1mbed TLS ChangeLog (Sorted per branch, date) 2 3= mbed TLS 2.16.12 branch released 2021-12-17 4 5Security 6 * Zeroize several intermediate variables used to calculate the expected 7 value when verifying a MAC or AEAD tag. This hardens the library in 8 case the value leaks through a memory disclosure vulnerability. For 9 example, a memory disclosure vulnerability could have allowed a 10 man-in-the-middle to inject fake ciphertext into a DTLS connection. 11 * Fix a double-free that happened after mbedtls_ssl_set_session() or 12 mbedtls_ssl_get_session() failed with MBEDTLS_ERR_SSL_ALLOC_FAILED 13 (out of memory). After that, calling mbedtls_ssl_session_free() 14 and mbedtls_ssl_free() would cause an internal session buffer to 15 be free()'d twice. 16 17Bugfix 18 * Stop using reserved identifiers as local variables. Fixes #4630. 19 * The GNU makefiles invoke python3 in preference to python except on Windows. 20 The check was accidentally not performed when cross-compiling for Windows 21 on Linux. Fix this. Fixes #4774. 22 * Mark basic constraints critical as appropriate. Note that the previous 23 entry for this fix in the 2.16.10 changelog was in error, and it was not 24 included in the 2.16.10 release as was stated. 25 Make 'mbedtls_x509write_crt_set_basic_constraints' consistent with RFC 26 5280 4.2.1.9 which says: "Conforming CAs MUST include this extension in 27 all CA certificates that contain public keys used to validate digital 28 signatures on certificates and MUST mark the extension as critical in 29 such certificates." Previous to this change, the extension was always 30 marked as non-critical. This was fixed by #4044. 31 * Fix missing constraints on x86_64 assembly code for bignum multiplication 32 that broke some bignum operations with (at least) Clang 12. 33 Fixes #4116, #4786, #4917. 34 * Failures of alternative implementations of AES or DES single-block 35 functions enabled with MBEDTLS_AES_ENCRYPT_ALT, MBEDTLS_AES_DECRYPT_ALT, 36 MBEDTLS_DES_CRYPT_ECB_ALT or MBEDTLS_DES3_CRYPT_ECB_ALT were ignored. 37 This does not concern the implementation provided with Mbed TLS, 38 where this function cannot fail, or full-module replacements with 39 MBEDTLS_AES_ALT or MBEDTLS_DES_ALT. Reported by Armelle Duboc in #1092. 40 * Some failures of HMAC operations were ignored. These failures could only 41 happen with an alternative implementation of the underlying hash module. 42 * Fix the build of sample programs when neither MBEDTLS_ERROR_C nor 43 MBEDTLS_ERROR_STRERROR_DUMMY is enabled. 44 * Fix a bug in mbedtls_gcm_starts() when the bit length of the iv 45 exceeds 2^32. Fixes #4884. 46 * Fix the build when no SHA2 module is included. Fixes #4930. 47 * Fix the build when only the bignum module is included. Fixes #4929. 48 * Fix a potential invalid pointer dereference and infinite loop bugs in 49 pkcs12 functions when the password is empty. Fix the documentation to 50 better describe the inputs to these functions and their possible values. 51 Fixes #5136. 52 53Changes 54 * Improve the performance of base64 constant-flow code. The result is still 55 slower than the original non-constant-flow implementation, but much faster 56 than the previous constant-flow implementation. Fixes #4814. 57 58= mbed TLS 2.16.11 branch released 2021-07-07 59 60Security 61 * Fix a bias in the generation of finite-field Diffie-Hellman-Merkle (DHM) 62 private keys and of blinding values for DHM and elliptic curves (ECP) 63 computations. Reported by FlorianF89 in #4245. 64 * Fix a potential side channel vulnerability in ECDSA ephemeral key generation. 65 An adversary who is capable of very precise timing measurements could 66 learn partial information about the leading bits of the nonce used for the 67 signature, allowing the recovery of the private key after observing a 68 large number of signature operations. This completes a partial fix in 69 Mbed TLS 2.16.4. 70 * It was possible to configure MBEDTLS_ECP_MAX_BITS to a value that is 71 too small, leading to buffer overflows in ECC operations. Fail the build 72 in such a case. 73 * An adversary with access to precise enough information about memory 74 accesses (typically, an untrusted operating system attacking a secure 75 enclave) could recover an RSA private key after observing the victim 76 performing a single private-key operation. Found and reported by 77 Zili KOU, Wenjian HE, Sharad Sinha, and Wei ZHANG. 78 * An adversary with access to precise enough timing information (typically, a 79 co-located process) could recover a Curve25519 or Curve448 static ECDH key 80 after inputting a chosen public key and observing the victim performing the 81 corresponding private-key operation. Found and reported by Leila Batina, 82 Lukas Chmielewski, Björn Haase, Niels Samwel and Peter Schwabe. 83 84Bugfix 85 * Fix premature fopen() call in mbedtls_entropy_write_seed_file which may 86 lead to the seed file corruption in case if the path to the seed file is 87 equal to MBEDTLS_PLATFORM_STD_NV_SEED_FILE. Contributed by Victor 88 Krasnoshchok in #3616. 89 * Fix some cases in the bignum module where the library constructed an 90 unintended representation of the value 0 which was not processed 91 correctly by some bignum operations. This could happen when 92 mbedtls_mpi_read_string() was called on "-0", or when 93 mbedtls_mpi_mul_mpi() and mbedtls_mpi_mul_int() was called with one of 94 the arguments being negative and the other being 0. Fixes #4643. 95 * Fix a compilation error when MBEDTLS_ECP_RANDOMIZE_MXZ_ALT is 96 defined. Fixes #4217. 97 * Fix an incorrect error code when parsing a PKCS#8 private key. 98 * In a TLS client, enforce the Diffie-Hellman minimum parameter size 99 set with mbedtls_ssl_conf_dhm_min_bitlen() precisely. Before, the 100 minimum size was rounded down to the nearest multiple of 8. 101 * In library/net_sockets.c, _POSIX_C_SOURCE and _XOPEN_SOURCE are 102 defined to specific values. If the code is used in a context 103 where these are already defined, this can result in a compilation 104 error. Instead, assume that if they are defined, the values will 105 be adequate to build Mbed TLS. 106 * The cipher suite TLS-RSA-WITH-CAMELLIA-256-GCM-SHA384 was not available 107 when SHA-1 was disabled and was offered when SHA-1 was enabled but SHA-384 108 was disabled. Fix the dependency. Fixes #4472. 109 * Fix test suite code on platforms where int32_t is not int, such as 110 Arm Cortex-M. Fixes #4530. 111 * Fix some issues affecting MBEDTLS_ARIA_ALT implementations: a misplaced 112 directive in a header and a missing initialization in the self-test. 113 * Fix a missing initialization in the Camellia self-test, affecting 114 MBEDTLS_CAMELLIA_ALT implementations. 115 * Fix a regression introduced in 2.16.8 which broke (D)TLS CBC ciphersuites 116 (when the encrypt-then-MAC extension is not in use) with some ALT 117 implementations of the underlying hash (SHA-1, SHA-256, SHA-384), causing 118 the affected side to wrongly reject valid messages. Fixes #4118. 119 * Fix mbedtls_net_poll() and mbedtls_net_recv_timeout() often failing with 120 MBEDTLS_ERR_NET_POLL_FAILED on Windows. Fixes #4465. 121 * Fix a resource leak in a test suite with an alternative AES 122 implementation. Fixes #4176. 123 * Fix a crash in mbedtls_mpi_debug_mpi on a bignum having 0 limbs. 124 Reported by lhuang04 in #4578. Fixes #4608. 125 * Fix a null pointer dereference when mbedtls_mpi_exp_mod() was called with 126 A=0 represented with 0 limbs. This bug could not be triggered by code 127 that constructed A with one of the mbedtls_mpi_read_xxx functions 128 (including in particular TLS code) since those always built an mpi object 129 with at least one limb. Credit to OSS-Fuzz. Fixes #4641. 130 * Fix mbedtls_mpi_gcd(G,A,B) when the value of B is zero. This had no 131 effect on Mbed TLS's internal use of mbedtls_mpi_gcd(), but may affect 132 applications that call mbedtls_mpi_gcd() directly. Fixes #4642. 133 * mbedtls_pk_sign() and mbedtls_pk_verify() and their extended and 134 restartable variants now require at least the specified hash length if 135 nonzero. Before, for RSA, hash_len was ignored in favor of the length of 136 the specified hash algorithm. 137 * Fix which alert is sent in some cases to conform to the 138 applicable RFC: on an invalid Finished message value, an 139 invalid max_fragment_length extension, or an 140 unsupported extension used by the server. 141 142Changes 143 * Fix the setting of the read timeout in the DTLS sample programs. 144 * Remove the AES sample application programs/aes/aescrypt2 which shows 145 bad cryptographic practice. Fix #1906. 146 * When building the test suites with GNU make, invoke python3 or python, not 147 python2. The build still works with either Python 2.7 or 3.5+, but we 148 recommend using a version of Python that is supported upstream. 149 150= mbed TLS 2.16.10 branch released 2021-03-12 151 152Default behavior changes 153 * In mbedtls_rsa_context objects, the ver field was formerly documented 154 as always 0. It is now reserved for internal purposes and may take 155 different values. 156 157Security 158 * Fix a buffer overflow in mbedtls_mpi_sub_abs() when calculating 159 |A| - |B| where |B| is larger than |A| and has more limbs (so the 160 function should return MBEDTLS_ERR_MPI_NEGATIVE_VALUE). Only 161 applications calling mbedtls_mpi_sub_abs() directly are affected: 162 all calls inside the library were safe since this function is 163 only called with |A| >= |B|. Reported by Guido Vranken in #4042. 164 * Fix an errorneous estimation for an internal buffer in 165 mbedtls_pk_write_key_pem(). If MBEDTLS_MPI_MAX_SIZE is set to an odd 166 value the function might fail to write a private RSA keys of the largest 167 supported size. 168 Found by Daniel Otte, reported in #4093 and fixed in #4094, 169 backported in #4100. 170 * Fix a stack buffer overflow with mbedtls_net_poll() and 171 mbedtls_net_recv_timeout() when given a file descriptor that is 172 beyond FD_SETSIZE. Reported by FigBug in #4169. 173 * Guard against strong local side channel attack against base64 tables by 174 making access aceess to them use constant flow code. 175 176Bugfix 177 * Fix an incorrect error code if an RSA private operation glitched. 178 * Fix a resource leak in CTR_DRBG and HMAC_DRBG when MBEDTLS_THREADING_C 179 is enabled, on platforms where initializing a mutex allocates resources. 180 This was a regression introduced in the previous release. Reported in 181 #4017, #4045 and #4071. 182 * Ensure that calling mbedtls_rsa_free() or mbedtls_entropy_free() 183 twice is safe. This happens for RSA when some Mbed TLS library functions 184 fail. Such a double-free was not safe when MBEDTLS_THREADING_C was 185 enabled on platforms where freeing a mutex twice is not safe. 186 * Fix a resource leak in a bad-arguments case of mbedtls_rsa_gen_key() 187 when MBEDTLS_THREADING_C is enabled on platforms where initializing 188 a mutex allocates resources. 189 * This change makes 'mbedtls_x509write_crt_set_basic_constraints' 190 consistent with RFC 5280 4.2.1.9 which says: "Conforming CAs MUST 191 include this extension in all CA certificates that contain public keys 192 used to validate digital signatures on certificates and MUST mark the 193 extension as critical in such certificates." Previous to this change, 194 the extension was always marked as non-critical. This was fixed by 195 #4044. 196 197= mbed TLS 2.16.9 branch released 2020-12-11 198 199Security 200 * Limit the size of calculations performed by mbedtls_mpi_exp_mod to 201 MBEDTLS_MPI_MAX_SIZE to prevent a potential denial of service when 202 generating Diffie-Hellman key pairs. Credit to OSS-Fuzz. 203 * A failure of the random generator was ignored in mbedtls_mpi_fill_random(), 204 which is how most uses of randomization in asymmetric cryptography 205 (including key generation, intermediate value randomization and blinding) 206 are implemented. This could cause failures or the silent use of non-random 207 values. A random generator can fail if it needs reseeding and cannot not 208 obtain entropy, or due to an internal failure (which, for Mbed TLS's own 209 CTR_DRBG or HMAC_DRBG, can only happen due to a misconfiguration). 210 * Fix a compliance issue whereby we were not checking the tag on the 211 algorithm parameters (only the size) when comparing the signature in the 212 description part of the cert to the real signature. This meant that a 213 NULL algorithm parameters entry would look identical to an array of REAL 214 (size zero) to the library and thus the certificate would be considered 215 valid. However, if the parameters do not match in *any* way then the 216 certificate should be considered invalid, and indeed OpenSSL marks these 217 certs as invalid when mbedtls did not. 218 Many thanks to guidovranken who found this issue via differential fuzzing 219 and reported it in #3629. 220 * Zeroising of local buffers and variables which are used for calculations 221 in mbedtls_pkcs5_pbkdf2_hmac(), mbedtls_internal_sha*_process(), 222 mbedtls_internal_md*_process() and mbedtls_internal_ripemd160_process() 223 functions to erase sensitive data from memory. Reported by 224 Johan Malmgren and Johan Uppman Bruce from Sectra. 225 226Bugfix 227 * Fix an invalid (but nonzero) return code from mbedtls_pk_parse_subpubkey() 228 when the input has trailing garbage. Fixes #2512. 229 * Fix rsa_prepare_blinding() to retry when the blinding value is not 230 invertible (mod N), instead of returning MBEDTLS_ERR_RSA_RNG_FAILED. This 231 addresses a regression but is rare in practice (approx. 1 in 2/sqrt(N)). 232 Found by Synopsys Coverity, fix contributed by Peter Kolbus (Garmin). 233 Fixes #3647. 234 * Fix the build when the macro _GNU_SOURCE is defined to a non-empty value. 235 Fix #3432. 236 * Correct the default IV size for mbedtls_cipher_info_t structures using 237 MBEDTLS_MODE_ECB to 0, since ECB mode ciphers don't use IVs. 238 * Make arc4random_buf available on NetBSD and OpenBSD when _POSIX_C_SOURCE is 239 defined. Fix contributed in #3571. Adopted for LTS branch 2.16 in #3602. 240 * Fix build failures on GCC 11. Fixes #3782. 241 * Fix a memory leak in mbedtls_mpi_sub_abs() when the result was negative 242 (an error condition) and the second operand was aliased to the result. 243 * Fix a case in elliptic curve arithmetic where an out-of-memory condition 244 could go undetected, resulting in an incorrect result. 245 * In CTR_DRBG and HMAC_DRBG, don't reset the reseed interval in seed(). 246 Fixes #2927. 247 * In PEM writing functions, fill the trailing part of the buffer with null 248 bytes. This guarantees that the corresponding parsing function can read 249 the buffer back, which was the case for mbedtls_x509write_{crt,csr}_pem 250 until this property was inadvertently broken in Mbed TLS 2.19.0. 251 Fixes #3682. 252 * Fix a build failure that occurred with the MBEDTLS_AES_SETKEY_DEC_ALT 253 option on. In this configuration key management methods that are required 254 for MBEDTLS_CIPHER_MODE_XTS were excluded from the build and made it fail. 255 Fixes #3818. Reported by John Stroebel. 256 257Changes 258 * Reduce stack usage significantly during sliding window exponentiation. 259 Reported in #3591 and fix contributed in #3592 by Daniel Otte. 260 * Remove the zeroization of a pointer variable in AES rounds. It was valid 261 but spurious and misleading since it looked like a mistaken attempt to 262 zeroize the pointed-to buffer. Reported by Antonio de la Piedra, CEA 263 Leti, France. 264 265= mbed TLS 2.16.8 branch released 2020-09-01 266 267Features 268 * Support building on e2k (Elbrus) architecture: correctly enable 269 -Wformat-signedness, and fix the code that causes signed-one-bit-field 270 and sign-compare warnings. Contributed by makise-homura (Igor Molchanov) 271 <akemi_homura@kurisa.ch>. 272 273Security 274 * When checking X.509 CRLs, a certificate was only considered as revoked if 275 its revocationDate was in the past according to the local clock if 276 available. In particular, on builds without MBEDTLS_HAVE_TIME_DATE, 277 certificates were never considered as revoked. On builds with 278 MBEDTLS_HAVE_TIME_DATE, an attacker able to control the local clock (for 279 example, an untrusted OS attacking a secure enclave) could prevent 280 revocation of certificates via CRLs. Fixed by no longer checking the 281 revocationDate field, in accordance with RFC 5280. Reported by 282 yuemonangong in #3340. Reported independently and fixed by 283 Raoul Strackx and Jethro Beekman in #3433. 284 * In (D)TLS record decryption, when using a CBC ciphersuites without the 285 Encrypt-then-Mac extension, use constant code flow memory access patterns 286 to extract and check the MAC. This is an improvement to the existing 287 countermeasure against Lucky 13 attacks. The previous countermeasure was 288 effective against network-based attackers, but less so against local 289 attackers. The new countermeasure defends against local attackers, even 290 if they have access to fine-grained measurements. In particular, this 291 fixes a local Lucky 13 cache attack found and reported by Tuba Yavuz, 292 Farhaan Fowze, Ken (Yihan) Bai, Grant Hernandez, and Kevin Butler 293 (University of Florida) and Dave Tian (Purdue University). 294 * Fix side channel in RSA private key operations and static (finite-field) 295 Diffie-Hellman. An adversary with precise enough timing and memory access 296 information (typically an untrusted operating system attacking a secure 297 enclave) could bypass an existing counter-measure (base blinding) and 298 potentially fully recover the private key. 299 * Fix a 1-byte buffer overread in mbedtls_x509_crl_parse_der(). 300 Credit to OSS-Fuzz for detecting the problem and to Philippe Antoine 301 for pinpointing the problematic code. 302 * Zeroising of plaintext buffers in mbedtls_ssl_read() to erase unused 303 application data from memory. Reported in #689 by 304 Johan Uppman Bruce of Sectra. 305 306Bugfix 307 * Avoid use of statically sized stack buffers for certificate writing. 308 This previously limited the maximum size of DER encoded certificates 309 in mbedtls_x509write_crt_der() to 2Kb. Reported by soccerGB in #2631. 310 * Reduce the stack consumption of mbedtls_x509write_csr_der() which 311 previously could lead to stack overflow on constrained devices. 312 Contributed by Doru Gucea and Simon Leet in #3464. 313 * Use arc4random_buf on NetBSD instead of rand implementation with cyclical 314 lower bits. Fix contributed in #3540. 315 * Fix building library/net_sockets.c and the ssl_mail_client program on 316 NetBSD. NetBSD conditionals were added for the backport to avoid the risk 317 of breaking a platform. Original fix contributed by Nia Alarie in #3422. 318 Adapted for long-term support branch 2.16 in #3558. 319 * Fix bug in redirection of unit test outputs on platforms where stdout is 320 defined as a macro. First reported in #2311 and fix contributed in #3528. 321 Adopted for LTS branch 2.16 in #3601. 322 323Changes 324 * Update copyright notices to use Linux Foundation guidance. As a result, 325 the copyright of contributors other than Arm is now acknowledged, and the 326 years of publishing are no longer tracked in the source files. This also 327 eliminates the need for the lines declaring the files to be part of 328 MbedTLS. Fixes #3457. 329 330= mbed TLS 2.16.7 branch released 2020-07-01 331 332Security 333 * Fix a side channel vulnerability in modular exponentiation that could 334 reveal an RSA private key used in a secure enclave. Noticed by Sangho Lee, 335 Ming-Wei Shih, Prasun Gera, Taesoo Kim and Hyesoon Kim (Georgia Institute 336 of Technology); and Marcus Peinado (Microsoft Research). Reported by Raoul 337 Strackx (Fortanix) in #3394. 338 * Fix side channel in mbedtls_ecp_check_pub_priv() and 339 mbedtls_pk_parse_key() / mbedtls_pk_parse_keyfile() (when loading a 340 private key that didn't include the uncompressed public key), as well as 341 mbedtls_ecp_mul() / mbedtls_ecp_mul_restartable() when called with a NULL 342 f_rng argument. An attacker with access to precise enough timing and 343 memory access information (typically an untrusted operating system 344 attacking a secure enclave) could fully recover the ECC private key. 345 Found and reported by Alejandro Cabrera Aldaya and Billy Brumley. 346 * Fix issue in Lucky 13 counter-measure that could make it ineffective when 347 hardware accelerators were used (using one of the MBEDTLS_SHAxxx_ALT 348 macros). This would cause the original Lucky 13 attack to be possible in 349 those configurations, allowing an active network attacker to recover 350 plaintext after repeated timing measurements under some conditions. 351 Reported and fix suggested by Luc Perneel in #3246. 352 353Bugfix 354 * Fix the Visual Studio Release x64 build configuration for mbedtls itself. 355 Completes a previous fix in Mbed TLS 2.16.3 that only fixed the build for 356 the example programs. Reported in #1430 and fix contributed by irwir. 357 * Fix undefined behavior in X.509 certificate parsing if the 358 pathLenConstraint basic constraint value is equal to INT_MAX. 359 The actual effect with almost every compiler is the intended 360 behavior, so this is unlikely to be exploitable anywhere. #3197 361 * Include asn1.h in error.c. Fixes #3328 reported by David Hu. 362 * Fix potential memory leaks in ecp_randomize_jac() and ecp_randomize_mxz() 363 when PRNG function fails. Contributed by Jonas Lejeune in #3318. 364 * Add additional bounds checks in ssl_write_client_hello() preventing 365 output buffer overflow if the configuration declared a buffer that was 366 too small. 367 368Changes 369 * Unify the example programs termination to call mbedtls_exit() instead of 370 using a return command. This has been done to enable customization of the 371 behavior in bare metal environments. 372 * Abort the ClientHello writing function as soon as some extension doesn't 373 fit into the record buffer. Previously, such extensions were silently 374 dropped. As a consequence, the TLS handshake now fails when the output 375 buffer is not large enough to hold the ClientHello. 376 * The ECP module, enabled by `MBEDTLS_ECP_C`, now depends on 377 `MBEDTLS_CTR_DRBG_C`, `MBEDTLS_HMAC_DRBG_C`, `MBEDTLS_SHA512_C` or 378 `MBEDTLS_SHA256_C` for some side-channel coutermeasures. If side channels 379 are not a concern, this dependency can be avoided by enabling the new 380 option `MBEDTLS_ECP_NO_INTERNAL_RNG`. 381 382= mbed TLS 2.16.6 branch released 2020-04-14 383 384Security 385 * Fix side channel in ECC code that allowed an adversary with access to 386 precise enough timing and memory access information (typically an 387 untrusted operating system attacking a secure enclave) to fully recover 388 an ECDSA private key. Found and reported by Alejandro Cabrera Aldaya, 389 Billy Brumley and Cesar Pereida Garcia. CVE-2020-10932 390 * Fix a potentially remotely exploitable buffer overread in a 391 DTLS client when parsing the Hello Verify Request message. 392 393Bugfix 394 * Fix compilation failure when both MBEDTLS_SSL_PROTO_DTLS and 395 MBEDTLS_SSL_HW_RECORD_ACCEL are enabled. 396 * Fix a function name in a debug message. Contributed by Ercan Ozturk in 397 #3013. 398 399= mbed TLS 2.16.5 branch released 2020-02-20 400 401Security 402 * Fix potential memory overread when performing an ECDSA signature 403 operation. The overread only happens with cryptographically low 404 probability (of the order of 2^-n where n is the bitsize of the curve) 405 unless the RNG is broken, and could result in information disclosure or 406 denial of service (application crash or extra resource consumption). 407 Found by Auke Zeilstra and Peter Schwabe, using static analysis. 408 * To avoid a side channel vulnerability when parsing an RSA private key, 409 read all the CRT parameters from the DER structure rather than 410 reconstructing them. Found by Alejandro Cabrera Aldaya and Billy Bob 411 Brumley. Reported and fix contributed by Jack Lloyd. 412 ARMmbed/mbed-crypto#352 413 414Bugfix 415 * Fix an unchecked call to mbedtls_md() in the x509write module. 416 * Fix a bug in mbedtls_pk_parse_key() that would cause it to accept some 417 RSA keys that would later be rejected by functions expecting private 418 keys. Found by Catena cyber using oss-fuzz (issue 20467). 419 * Fix a bug in mbedtls_pk_parse_key() that would cause it to accept some 420 RSA keys with invalid values by silently fixing those values. 421 422= mbed TLS 2.16.4 branch released 2020-01-15 423 424Security 425 * Fix side channel vulnerability in ECDSA. Our bignum implementation is not 426 constant time/constant trace, so side channel attacks can retrieve the 427 blinded value, factor it (as it is smaller than RSA keys and not guaranteed 428 to have only large prime factors), and then, by brute force, recover the 429 key. Reported by Alejandro Cabrera Aldaya and Billy Brumley. 430 * Zeroize local variables in mbedtls_internal_aes_encrypt() and 431 mbedtls_internal_aes_decrypt() before exiting the function. The value of 432 these variables can be used to recover the last round key. To follow best 433 practice and to limit the impact of buffer overread vulnerabilities (like 434 Heartbleed) we need to zeroize them before exiting the function. 435 Issue reported by Tuba Yavuz, Farhaan Fowze, Ken (Yihang) Bai, 436 Grant Hernandez, and Kevin Butler (University of Florida) and 437 Dave Tian (Purdue University). 438 * Fix side channel vulnerability in ECDSA key generation. Obtaining precise 439 timings on the comparison in the key generation enabled the attacker to 440 learn leading bits of the ephemeral key used during ECDSA signatures and to 441 recover the private key. Reported by Jeremy Dubeuf. 442 * Catch failure of AES functions in mbedtls_ctr_drbg_random(). Uncaught 443 failures could happen with alternative implementations of AES. Bug 444 reported and fix proposed by Johan Uppman Bruce and Christoffer Lauri, 445 Sectra. 446 447Bugfix 448 * Remove redundant line for getting the bitlen of a bignum, since the variable 449 holding the returned value is overwritten a line after. 450 Found by irwir in #2377. 451 * Support mbedtls_hmac_drbg_set_entropy_len() and 452 mbedtls_ctr_drbg_set_entropy_len() before the DRBG is seeded. Before, 453 the initial seeding always reset the entropy length to the compile-time 454 default. 455 456Changes 457 * Add unit tests for AES-GCM when called through mbedtls_cipher_auth_xxx() 458 from the cipher abstraction layer. Fixes #2198. 459 * Clarify how the interface of the CTR_DRBG and HMAC modules relates to 460 NIST SP 800-90A. In particular CTR_DRBG requires an explicit nonce 461 to achieve a 256-bit strength if MBEDTLS_ENTROPY_FORCE_SHA256 is set. 462 463= mbed TLS 2.16.3 branch released 2019-09-06 464 465Security 466 * Fix a missing error detection in ECJPAKE. This could have caused a 467 predictable shared secret if a hardware accelerator failed and the other 468 side of the key exchange had a similar bug. 469 * The deterministic ECDSA calculation reused the scheme's HMAC-DRBG to 470 implement blinding. Because of this for the same key and message the same 471 blinding value was generated. This reduced the effectiveness of the 472 countermeasure and leaked information about the private key through side 473 channels. Reported by Jack Lloyd. 474 * When writing a private EC key, use a constant size for the private 475 value, as specified in RFC 5915. Previously, the value was written 476 as an ASN.1 INTEGER, which caused the size of the key to leak 477 about 1 bit of information on average and could cause the value to be 478 1 byte too large for the output buffer. 479 480API Changes 481 * The new function mbedtls_ecdsa_sign_det_ext() is similar to 482 mbedtls_ecdsa_sign_det() but allows passing an external RNG for the 483 purpose of blinding. 484 485Bugfix 486 * Fix to allow building test suites with any warning that detects unused 487 functions. Fixes #1628. 488 * Fix typo in net_would_block(). Fixes #528 reported by github-monoculture. 489 * Remove redundant include file in timing.c. Fixes #2640 reported by irwir. 490 * Fix Visual Studio Release x64 build configuration by inheriting 491 PlatformToolset from the project configuration. Fixes #1430 reported by 492 irwir. 493 * Enable Suite B with subset of ECP curves. Make sure the code compiles even 494 if some curves are not defined. Fixes #1591 reported by dbedev. 495 * Fix misuse of signed arithmetic in the HAVEGE module. #2598 496 * Update test certificates that were about to expire. Reported by 497 Bernhard M. Wiedemann in #2357. 498 * Fix the build on ARMv5TE in ARM mode to not use assembly instructions 499 that are only available in Thumb mode. Fix contributed by Aurelien Jarno 500 in #2169. 501 * Fix undefined memset(NULL) call in test_suite_nist_kw. 502 * Make NV seed test support MBEDTLS_ENTROPY_FORCE_SHA256. 503 * Fix propagation of restart contexts in restartable EC operations. 504 This could previously lead to segmentation faults in builds using an 505 address-sanitizer and enabling but not using MBEDTLS_ECP_RESTARTABLE. 506 * Fix memory leak in in mpi_miller_rabin(). Contributed by 507 Jens Wiklander <jens.wiklander@linaro.org> in #2363 508 * Improve code clarity in x509_crt module, removing false-positive 509 uninitialized variable warnings on some recent toolchains (GCC8, etc). 510 Discovered and fixed by Andy Gross (Linaro), #2392. 511 * Zero length buffer check for undefined behavior in 512 mbedtls_platform_zeroize(). Fixes ARMmbed/mbed-crypto#49. 513 * Fix bug in endianness conversion in bignum module. This lead to 514 functionally incorrect code on bigendian systems which don't have 515 __BYTE_ORDER__ defined. Reported by Brendan Shanks. Fixes #2622. 516 517Changes 518 * Make it easier to define MBEDTLS_PARAM_FAILED as assert (which config.h 519 suggests). #2671 520 * Make `make clean` clean all programs always. Fixes #1862. 521 522= mbed TLS 2.16.2 branch released 2019-06-11 523 524Security 525 * Make mbedtls_ecdh_get_params return an error if the second key 526 belongs to a different group from the first. Before, if an application 527 passed keys that belonged to different group, the first key's data was 528 interpreted according to the second group, which could lead to either 529 an error or a meaningless output from mbedtls_ecdh_get_params. In the 530 latter case, this could expose at most 5 bits of the private key. 531 532Bugfix 533 * Server's RSA certificate in certs.c was SHA-1 signed. In the default 534 mbedTLS configuration only SHA-2 signed certificates are accepted. 535 This certificate is used in the demo server programs, which lead the 536 client programs to fail at the peer's certificate verification 537 due to an unacceptable hash signature. The certificate has been 538 updated to one that is SHA-256 signed. Fix contributed by 539 Illya Gerasymchuk. 540 * Fix private key DER output in the key_app_writer example. File contents 541 were shifted by one byte, creating an invalid ASN.1 tag. Fixed by 542 Christian Walther in #2239. 543 * Fix potential memory leak in X.509 self test. Found and fixed by 544 Junhwan Park, #2106. 545 * Reduce stack usage of hkdf tests. Fixes #2195. 546 * Fix 1-byte buffer overflow in mbedtls_mpi_write_string() when 547 used with negative inputs. Found by Guido Vranken in #2404. Credit to 548 OSS-Fuzz. 549 * Fix bugs in the AEAD test suite which would be exposed by ciphers which 550 either used both encrypt and decrypt key schedules, or which perform padding. 551 GCM and CCM were not affected. Fixed by Jack Lloyd. 552 * Fix incorrect default port number in ssl_mail_client example's usage. 553 Found and fixed by irwir. #2337 554 * Add missing parentheses around parameters in the definition of the 555 public macro MBEDTLS_X509_ID_FLAG. This could lead to invalid evaluation 556 in case operators binding less strongly than subtraction were used 557 for the parameter. 558 * Add a check for MBEDTLS_X509_CRL_PARSE_C in ssl_server2, guarding the crl 559 sni entry parameter. Reported by inestlerode in #560. 560 * Add DER-encoded test CRTs to library/certs.c, allowing 561 the example programs ssl_server2 and ssl_client2 to be run 562 if MBEDTLS_FS_IO and MBEDTLS_PEM_PARSE_C are unset. Fixes #2254. 563 * Fix missing bounds checks in X.509 parsing functions that could 564 lead to successful parsing of ill-formed X.509 CRTs. Fixes #2437. 565 * Fix multiple X.509 functions previously returning ASN.1 low-level error 566 codes to always wrap these codes into X.509 high level error codes before 567 returning. Fixes #2431. 568 569Changes 570 * Return from various debugging routines immediately if the 571 provided SSL context is unset. 572 * Remove dead code from bignum.c in the default configuration. 573 Found by Coverity, reported and fixed by Peter Kolbus (Garmin). Fixes #2309. 574 * Add test for minimal value of MBEDTLS_MPI_WINDOW_SIZE to all.sh. 575 Contributed by Peter Kolbus (Garmin). 576 * Change wording in the `mbedtls_ssl_conf_max_frag_len()`'s documentation to 577 improve clarity. Fixes #2258. 578 * Replace multiple uses of MD2 by SHA-256 in X.509 test suite. Fixes #821. 579 580= mbed TLS 2.16.1 branch released 2019-03-19 581 582Features 583 * Add MBEDTLS_REMOVE_3DES_CIPHERSUITES to allow removing 3DES ciphersuites 584 from the default list (enabled by default). See 585 https://sweet32.info/SWEET32_CCS16.pdf. 586 587Bugfix 588 * Fix a compilation issue with mbedtls_ecp_restart_ctx not being defined 589 when MBEDTLS_ECP_ALT is defined. Reported by jwhui. Fixes #2242. 590 * Run the AD too long test only if MBEDTLS_CCM_ALT is not defined. 591 Raised as a comment in #1996. 592 * Reduce the stack consumption of mbedtls_mpi_fill_random() which could 593 previously lead to a stack overflow on constrained targets. 594 * Add `MBEDTLS_SELF_TEST` for the mbedtls_self_test functions 595 in the header files, which missed the precompilation check. #971 596 * Fix clobber list in MIPS assembly for large integer multiplication. 597 Previously, this could lead to functionally incorrect assembly being 598 produced by some optimizing compilers, showing up as failures in 599 e.g. RSA or ECC signature operations. Reported in #1722, fix suggested 600 by Aurelien Jarno and submitted by Jeffrey Martin. 601 * Fix signed-to-unsigned integer conversion warning 602 in X.509 module. Fixes #2212. 603 * Reduce stack usage of `mpi_write_hlp()` by eliminating recursion. 604 Fixes #2190. 605 * Remove a duplicate #include in a sample program. Fixed by Masashi Honma #2326. 606 * Remove the mbedtls namespacing from the header file, to fix a "file not found" 607 build error. Fixed by Haijun Gu #2319. 608 * Fix returning the value 1 when mbedtls_ecdsa_genkey failed. 609 * Fix false failure in all.sh when backup files exist in include/mbedtls 610 (e.g. config.h.bak). Fixed by Peter Kolbus (Garmin) #2407. 611 * Ensure that unused bits are zero when writing ASN.1 bitstrings when using 612 mbedtls_asn1_write_bitstring(). 613 * Fix issue when writing the named bitstrings in KeyUsage and NsCertType 614 extensions in CSRs and CRTs that caused these bitstrings to not be encoded 615 correctly as trailing zeroes were not accounted for as unused bits in the 616 leading content octet. Fixes #1610. 617 618Changes 619 * Include configuration file in all header files that use configuration, 620 instead of relying on other header files that they include. 621 Inserted as an enhancement for #1371 622 * Add support for alternative CSR headers, as used by Microsoft and defined 623 in RFC 7468. Found by Michael Ernst. Fixes #767. 624 * Fix configuration queries in ssl-opt.h. #2030 625 * Ensure that ssl-opt.h can be run in OS X. #2029 626 * Reduce the complexity of the timing tests. They were assuming more than the 627 underlying OS actually guarantees. 628 * Re-enable certain interoperability tests in ssl-opt.sh which had previously 629 been disabled for lack of a sufficiently recent version of GnuTLS on the CI. 630 * Ciphersuites based on 3DES now have the lowest priority by default when 631 they are enabled. 632 633= mbed TLS 2.16.0 branch released 2018-12-21 634 635Features 636 * Add a new config.h option of MBEDTLS_CHECK_PARAMS that enables validation 637 of parameters in the API. This allows detection of obvious misuses of the 638 API, such as passing NULL pointers. The API of existing functions hasn't 639 changed, but requirements on parameters have been made more explicit in 640 the documentation. See the corresponding API documentation for each 641 function to see for which parameter values it is defined. This feature is 642 disabled by default. See its API documentation in config.h for additional 643 steps you have to take when enabling it. 644 645API Changes 646 * The following functions in the random generator modules have been 647 deprecated and replaced as shown below. The new functions change 648 the return type from void to int to allow returning error codes when 649 using MBEDTLS_<MODULE>_ALT for the underlying AES or message digest 650 primitive. Fixes #1798. 651 mbedtls_ctr_drbg_update() -> mbedtls_ctr_drbg_update_ret() 652 mbedtls_hmac_drbg_update() -> mbedtls_hmac_drbg_update_ret() 653 * Extend ECDH interface to enable alternative implementations. 654 * Deprecate error codes of the form MBEDTLS_ERR_xxx_INVALID_KEY_LENGTH for 655 ARIA, CAMELLIA and Blowfish. These error codes will be replaced by 656 the more generic per-module error codes MBEDTLS_ERR_xxx_BAD_INPUT_DATA. 657 * Additional parameter validation checks have been added for the following 658 modules - AES, ARIA, Blowfish, CAMELLIA, CCM, GCM, DHM, ECP, ECDSA, ECDH, 659 ECJPAKE, SHA, Chacha20 and Poly1305, cipher, pk, RSA, and MPI. 660 Where modules have had parameter validation added, existing parameter 661 checks may have changed. Some modules, such as Chacha20 had existing 662 parameter validation whereas other modules had little. This has now been 663 changed so that the same level of validation is present in all modules, and 664 that it is now optional with the MBEDTLS_CHECK_PARAMS flag which by default 665 is off. That means that checks which were previously present by default 666 will no longer be. 667 668New deprecations 669 * Deprecate mbedtls_ctr_drbg_update and mbedtls_hmac_drbg_update 670 in favor of functions that can return an error code. 671 672Bugfix 673 * Fix for Clang, which was reporting a warning for the bignum.c inline 674 assembly for AMD64 targets creating string literals greater than those 675 permitted by the ISO C99 standard. Found by Aaron Jones. Fixes #482. 676 * Fix runtime error in `mbedtls_platform_entropy_poll()` when run 677 through qemu user emulation. Reported and fix suggested by randombit 678 in #1212. Fixes #1212. 679 * Fix an unsafe bounds check when restoring an SSL session from a ticket. 680 This could lead to a buffer overflow, but only in case ticket authentication 681 was broken. Reported and fix suggested by Guido Vranken in #659. 682 * Add explicit integer to enumeration type casts to example program 683 programs/pkey/gen_key which previously led to compilation failure 684 on some toolchains. Reported by phoenixmcallister. Fixes #2170. 685 * Fix double initialization of ECC hardware that made some accelerators 686 hang. 687 * Clarify documentation of mbedtls_ssl_set_own_cert() regarding the absence 688 of check for certificate/key matching. Reported by Attila Molnar, #507. 689 690= mbed TLS 2.14.1 branch released 2018-11-30 691 692Security 693 * Fix timing variations and memory access variations in RSA PKCS#1 v1.5 694 decryption that could lead to a Bleichenbacher-style padding oracle 695 attack. In TLS, this affects servers that accept ciphersuites based on 696 RSA decryption (i.e. ciphersuites whose name contains RSA but not 697 (EC)DH(E)). Discovered by Eyal Ronen (Weizmann Institute), Robert Gillham 698 (University of Adelaide), Daniel Genkin (University of Michigan), 699 Adi Shamir (Weizmann Institute), David Wong (NCC Group), and Yuval Yarom 700 (University of Adelaide, Data61). The attack is described in more detail 701 in the paper available here: http://cat.eyalro.net/cat.pdf CVE-2018-19608 702 * In mbedtls_mpi_write_binary(), don't leak the exact size of the number 703 via branching and memory access patterns. An attacker who could submit 704 a plaintext for RSA PKCS#1 v1.5 decryption but only observe the timing 705 of the decryption and not its result could nonetheless decrypt RSA 706 plaintexts and forge RSA signatures. Other asymmetric algorithms may 707 have been similarly vulnerable. Reported by Eyal Ronen, Robert Gillham, 708 Daniel Genkin, Adi Shamir, David Wong and Yuval Yarom. 709 * Wipe sensitive buffers on the stack in the CTR_DRBG and HMAC_DRBG 710 modules. 711 712API Changes 713 * The new functions mbedtls_ctr_drbg_update_ret() and 714 mbedtls_hmac_drbg_update_ret() are similar to mbedtls_ctr_drbg_update() 715 and mbedtls_hmac_drbg_update() respectively, but the new functions 716 report errors whereas the old functions return void. We recommend that 717 applications use the new functions. 718 719= mbed TLS 2.14.0 branch released 2018-11-19 720 721Security 722 * Fix overly strict DN comparison when looking for CRLs belonging to a 723 particular CA. This previously led to ignoring CRLs when the CRL's issuer 724 name and the CA's subject name differed in their string encoding (e.g., 725 one using PrintableString and the other UTF8String) or in the choice of 726 upper and lower case. Reported by Henrik Andersson of Bosch GmbH in issue 727 #1784. 728 * Fix a flawed bounds check in server PSK hint parsing. In case the 729 incoming message buffer was placed within the first 64KiB of address 730 space and a PSK-(EC)DHE ciphersuite was used, this allowed an attacker 731 to trigger a memory access up to 64KiB beyond the incoming message buffer, 732 potentially leading to an application crash or information disclosure. 733 * Fix mbedtls_mpi_is_prime() to use more rounds of probabilistic testing. The 734 previous settings for the number of rounds made it practical for an 735 adversary to construct non-primes that would be erroneously accepted as 736 primes with high probability. This does not have an impact on the 737 security of TLS, but can matter in other contexts with numbers chosen 738 potentially by an adversary that should be prime and can be validated. 739 For example, the number of rounds was enough to securely generate RSA key 740 pairs or Diffie-Hellman parameters, but was insufficient to validate 741 Diffie-Hellman parameters properly. 742 See "Prime and Prejudice" by by Martin R. Albrecht and Jake Massimo and 743 Kenneth G. Paterson and Juraj Somorovsky. 744 745Features 746 * Add support for temporarily suspending expensive ECC computations after 747 some configurable amount of operations. This is intended to be used in 748 constrained, single-threaded systems where ECC is time consuming and can 749 block other operations until they complete. This is disabled by default, 750 but can be enabled by MBEDTLS_ECP_RESTARTABLE at compile time and 751 configured by mbedtls_ecp_set_max_ops() at runtime. It applies to the new 752 xxx_restartable functions in ECP, ECDSA, PK and X.509 (CRL not supported 753 yet), and to existing functions in ECDH and SSL (currently only 754 implemented client-side, for ECDHE-ECDSA ciphersuites in TLS 1.2, 755 including client authentication). 756 * Add support for Arm CPU DSP extensions to accelerate asymmetric key 757 operations. On CPUs where the extensions are available, they can accelerate 758 MPI multiplications used in ECC and RSA cryptography. Contributed by 759 Aurelien Jarno. 760 * Extend RSASSA-PSS signature to allow a smaller salt size. Previously, PSS 761 signature always used a salt with the same length as the hash, and returned 762 an error if this was not possible. Now the salt size may be up to two bytes 763 shorter. This allows the library to support all hash and signature sizes 764 that comply with FIPS 186-4, including SHA-512 with a 1024-bit key. 765 * Add support for 128-bit keys in CTR_DRBG. Note that using keys shorter 766 than 256 bits limits the security of generated material to 128 bits. 767 768API Changes 769 * Add a common error code of `MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED` for 770 a feature that is not supported by underlying alternative 771 implementations implementing cryptographic primitives. This is useful for 772 hardware accelerators that don't implement all options or features. 773 774New deprecations 775 * All module specific errors following the form 776 MBEDTLS_ERR_XXX_FEATURE_UNAVAILABLE that indicate a feature is not 777 supported are deprecated and are now replaced by the new equivalent 778 platform error. 779 * All module specific generic hardware acceleration errors following the 780 form MBEDTLS_ERR_XXX_HW_ACCEL_FAILED that are deprecated and are replaced 781 by the equivalent plaform error. 782 * Deprecate the function mbedtls_mpi_is_prime() in favor of 783 mbedtls_mpi_is_prime_ext() which allows specifying the number of 784 Miller-Rabin rounds. 785 786Bugfix 787 * Fix wrong order of freeing in programs/ssl/ssl_server2 example 788 application leading to a memory leak in case both 789 MBEDTLS_MEMORY_BUFFER_ALLOC_C and MBEDTLS_MEMORY_BACKTRACE are set. 790 Fixes #2069. 791 * Fix a bug in the update function for SSL ticket keys which previously 792 invalidated keys of a lifetime of less than a 1s. Fixes #1968. 793 * Fix failure in hmac_drbg in the benchmark sample application, when 794 MBEDTLS_THREADING_C is defined. Found by TrinityTonic, #1095 795 * Fix a bug in the record decryption routine ssl_decrypt_buf() 796 which lead to accepting properly authenticated but improperly 797 padded records in case of CBC ciphersuites using Encrypt-then-MAC. 798 * Fix memory leak and freeing without initialization in the example 799 program programs/x509/cert_write. Fixes #1422. 800 * Ignore IV in mbedtls_cipher_set_iv() when the cipher mode is 801 MBEDTLS_MODE_ECB. Found by ezdevelop. Fixes #1091. 802 * Zeroize memory used for buffering or reassembling handshake messages 803 after use. 804 * Use `mbedtls_platform_zeroize()` instead of `memset()` for zeroization 805 of sensitive data in the example programs aescrypt2 and crypt_and_hash. 806 * Change the default string format used for various X.509 DN attributes to 807 UTF8String. Previously, the use of the PrintableString format led to 808 wildcards and non-ASCII characters being unusable in some DN attributes. 809 Reported by raprepo in #1860 and by kevinpt in #468. Fix contributed by 810 Thomas-Dee. 811 * Fix compilation failure for configurations which use compile time 812 replacements of standard calloc/free functions through the macros 813 MBEDTLS_PLATFORM_CALLOC_MACRO and MBEDTLS_PLATFORM_FREE_MACRO. 814 Reported by ole-de and ddhome2006. Fixes #882, #1642 and #1706. 815 816Changes 817 * Removed support for Yotta as a build tool. 818 * Add tests for session resumption in DTLS. 819 * Close a test gap in (D)TLS between the client side and the server side: 820 test the handling of large packets and small packets on the client side 821 in the same way as on the server side. 822 * Change the dtls_client and dtls_server samples to work by default over 823 IPv6 and optionally by a build option over IPv4. 824 * Change the use of Windows threading to use Microsoft Visual C++ runtime 825 calls, rather than Win32 API calls directly. This is necessary to avoid 826 conflict with C runtime usage. Found and fixed by irwir. 827 * Remember the string format of X.509 DN attributes when replicating 828 X.509 DNs. Previously, DN attributes were always written in their default 829 string format (mostly PrintableString), which could lead to CRTs being 830 created which used PrintableStrings in the issuer field even though the 831 signing CA used UTF8Strings in its subject field; while X.509 compliant, 832 such CRTs were rejected in some applications, e.g. some versions of 833 Firefox, curl and GnuTLS. Reported in #1033 by Moschn. Fix contributed by 834 Thomas-Dee. 835 * Improve documentation of mbedtls_ssl_get_verify_result(). 836 Fixes #517 reported by github-monoculture. 837 * Add MBEDTLS_MPI_GEN_PRIME_FLAG_LOW_ERR flag to mbedtls_mpi_gen_prime() and 838 use it to reduce error probability in RSA key generation to levels mandated 839 by FIPS-186-4. 840 841= mbed TLS 2.13.1 branch released 2018-09-06 842 843API Changes 844 * Extend the platform module with an abstraction mbedtls_platform_gmtime_r() 845 whose implementation should behave as a thread-safe version of gmtime(). 846 This allows users to configure such an implementation at compile time when 847 the target system cannot be deduced automatically, by setting the option 848 MBEDTLS_PLATFORM_GMTIME_R_ALT. At this stage Mbed TLS is only able to 849 automatically select implementations for Windows and POSIX C libraries. 850 851Bugfix 852 * Fix build failures on platforms where only gmtime() is available but 853 neither gmtime_r() nor gmtime_s() are present. Fixes #1907. 854 855= mbed TLS 2.13.0 branch released 2018-08-31 856 857Security 858 * Fix an issue in the X.509 module which could lead to a buffer overread 859 during certificate extensions parsing. In case of receiving malformed 860 input (extensions length field equal to 0), an illegal read of one byte 861 beyond the input buffer is made. Found and analyzed by Nathan Crandall. 862 863Features 864 * Add support for fragmentation of outgoing DTLS handshake messages. This 865 is controlled by the maximum fragment length as set locally or negotiated 866 with the peer, as well as by a new per-connection MTU option, set using 867 mbedtls_ssl_set_mtu(). 868 * Add support for auto-adjustment of MTU to a safe value during the 869 handshake when flights do not get through (RFC 6347, section 4.1.1.1, 870 last paragraph). 871 * Add support for packing multiple records within a single datagram, 872 enabled by default. 873 * Add support for buffering out-of-order handshake messages in DTLS. 874 The maximum amount of RAM used for this can be controlled by the 875 compile-time constant MBEDTLS_SSL_DTLS_MAX_BUFFERING defined 876 in mbedtls/config.h. 877 878API Changes 879 * Add function mbedtls_ssl_set_datagram_packing() to configure 880 the use of datagram packing (enabled by default). 881 882Bugfix 883 * Fix a potential memory leak in mbedtls_ssl_setup() function. An allocation 884 failure in the function could lead to other buffers being leaked. 885 * Fixes an issue with MBEDTLS_CHACHAPOLY_C which would not compile if 886 MBEDTLS_ARC4_C and MBEDTLS_CIPHER_NULL_CIPHER weren't also defined. #1890 887 * Fix a memory leak in ecp_mul_comb() if ecp_precompute_comb() fails. 888 Fix contributed by Espressif Systems. 889 * Add ecc extensions only if an ecc based ciphersuite is used. 890 This improves compliance to RFC 4492, and as a result, solves 891 interoperability issues with BouncyCastle. Raised by milenamil in #1157. 892 * Replace printf with mbedtls_printf in the ARIA module. Found by 893 TrinityTonic in #1908. 894 * Fix potential use-after-free in mbedtls_ssl_get_max_frag_len() 895 and mbedtls_ssl_get_record_expansion() after a session reset. Fixes #1941. 896 * Fix a bug that caused SSL/TLS clients to incorrectly abort the handshake 897 with TLS versions 1.1 and earlier when the server requested authentication 898 without providing a list of CAs. This was due to an overly strict bounds 899 check in parsing the CertificateRequest message, 900 introduced in Mbed TLS 2.12.0. Fixes #1954. 901 * Fix a miscalculation of the maximum record expansion in 902 mbedtls_ssl_get_record_expansion() in case of ChachaPoly ciphersuites, 903 or CBC ciphersuites in (D)TLS versions 1.1 or higher. Fixes #1913, #1914. 904 * Fix undefined shifts with negative values in certificates parsing 905 (found by Catena cyber using oss-fuzz) 906 * Fix memory leak and free without initialization in pk_encrypt 907 and pk_decrypt example programs. Reported by Brace Stout. Fixes #1128. 908 * Remove redundant else statement. Raised by irwir. Fixes #1776. 909 910Changes 911 * Copy headers preserving timestamps when doing a "make install". 912 Contributed by xueruini. 913 * Allow the forward declaration of public structs. Contributed by Dawid 914 Drozd. Fixes #1215 raised by randombit. 915 * Improve compatibility with some alternative CCM implementations by using 916 CCM test vectors from RAM. 917 * Add support for buffering of out-of-order handshake messages. 918 * Add warnings to the documentation of the HKDF module to reduce the risk 919 of misusing the mbedtls_hkdf_extract() and mbedtls_hkdf_expand() 920 functions. Fixes #1775. Reported by Brian J. Murray. 921 922= mbed TLS 2.12.0 branch released 2018-07-25 923 924Security 925 * Fix a vulnerability in TLS ciphersuites based on CBC and using SHA-384, 926 in (D)TLS 1.0 to 1.2, that allowed an active network attacker to 927 partially recover the plaintext of messages under some conditions by 928 exploiting timing measurements. With DTLS, the attacker could perform 929 this recovery by sending many messages in the same connection. With TLS 930 or if mbedtls_ssl_conf_dtls_badmac_limit() was used, the attack only 931 worked if the same secret (for example a HTTP Cookie) has been repeatedly 932 sent over connections manipulated by the attacker. Connections using GCM 933 or CCM instead of CBC, using hash sizes other than SHA-384, or using 934 Encrypt-then-Mac (RFC 7366) were not affected. The vulnerability was 935 caused by a miscalculation (for SHA-384) in a countermeasure to the 936 original Lucky 13 attack. Found by Kenny Paterson, Eyal Ronen and Adi 937 Shamir. 938 * Fix a vulnerability in TLS ciphersuites based on CBC, in (D)TLS 1.0 to 939 1.2, that allowed a local attacker, able to execute code on the local 940 machine as well as manipulate network packets, to partially recover the 941 plaintext of messages under some conditions by using a cache attack 942 targeting an internal MD/SHA buffer. With TLS or if 943 mbedtls_ssl_conf_dtls_badmac_limit() was used, the attack only worked if 944 the same secret (for example a HTTP Cookie) has been repeatedly sent over 945 connections manipulated by the attacker. Connections using GCM or CCM 946 instead of CBC or using Encrypt-then-Mac (RFC 7366) were not affected. 947 Found by Kenny Paterson, Eyal Ronen and Adi Shamir. 948 * Add a counter-measure against a vulnerability in TLS ciphersuites based 949 on CBC, in (D)TLS 1.0 to 1.2, that allowed a local attacker, able to 950 execute code on the local machine as well as manipulate network packets, 951 to partially recover the plaintext of messages under some conditions (see 952 previous entry) by using a cache attack targeting the SSL input record 953 buffer. Connections using GCM or CCM instead of CBC or using 954 Encrypt-then-Mac (RFC 7366) were not affected. Found by Kenny Paterson, 955 Eyal Ronen and Adi Shamir. 956 957Features 958 * Add new crypto primitives from RFC 7539: stream cipher Chacha20, one-time 959 authenticator Poly1305 and AEAD construct Chacha20-Poly1305. Contributed 960 by Daniel King. 961 * Add support for CHACHA20-POLY1305 ciphersuites from RFC 7905. 962 * Add platform support for the Haiku OS. (https://www.haiku-os.org). 963 Contributed by Augustin Cavalier. 964 * Make the receive and transmit buffers independent sizes, for situations 965 where the outgoing buffer can be fixed at a smaller size than the incoming 966 buffer, which can save some RAM. If buffer lengths are kept equal, there 967 is no functional difference. Contributed by Angus Gratton, and also 968 independently contributed again by Paul Sokolovsky. 969 * Add support for key wrapping modes based on AES as defined by 970 NIST SP 800-38F algorithms KW and KWP and by RFC 3394 and RFC 5649. 971 972Bugfix 973 * Fix the key_app_writer example which was writing a leading zero byte which 974 was creating an invalid ASN.1 tag. Found by Aryeh R. Fixes #1257. 975 * Fix compilation error on C++, because of a variable named new. 976 Found and fixed by Hirotaka Niisato in #1783. 977 * Fix "no symbols" warning issued by ranlib when building on Mac OS X. Fix 978 contributed by tabascoeye. 979 * Clarify documentation for mbedtls_ssl_write() to include 0 as a valid 980 return value. Found by @davidwu2000. #839 981 * Fix a memory leak in mbedtls_x509_csr_parse(), found by catenacyber, 982 Philippe Antoine. Fixes #1623. 983 * Remove unused headers included in x509.c. Found by Chris Hanson and fixed 984 by Brendan Shanks. Part of a fix for #992. 985 * Fix compilation error when MBEDTLS_ARC4_C is disabled and 986 MBEDTLS_CIPHER_NULL_CIPHER is enabled. Found by TrinityTonic in #1719. 987 * Added length checks to some TLS parsing functions. Found and fixed by 988 Philippe Antoine from Catena cyber. #1663. 989 * Fix the inline assembly for the MPI multiply helper function for i386 and 990 i386 with SSE2. Found by László Langó. Fixes #1550 991 * Fix namespacing in header files. Remove the `mbedtls` namespacing in 992 the `#include` in the header files. Resolves #857 993 * Fix compiler warning of 'use before initialisation' in 994 mbedtls_pk_parse_key(). Found by Martin Boye Petersen and fixed by Dawid 995 Drozd. #1098 996 * Fix decryption for zero length messages (which contain all padding) when a 997 CBC based ciphersuite is used together with Encrypt-then-MAC. Previously, 998 such a message was wrongly reported as an invalid record and therefore lead 999 to the connection being terminated. Seen most often with OpenSSL using 1000 TLS 1.0. Reported by @kFYatek and by Conor Murphy on the forum. Fix 1001 contributed by Espressif Systems. Fixes #1632 1002 * Fix ssl_client2 example to send application data with 0-length content 1003 when the request_size argument is set to 0 as stated in the documentation. 1004 Fixes #1833. 1005 * Correct the documentation for `mbedtls_ssl_get_session()`. This API has 1006 deep copy of the session, and the peer certificate is not lost. Fixes #926. 1007 * Fix build using -std=c99. Fixed by Nick Wilson. 1008 1009Changes 1010 * Fail when receiving a TLS alert message with an invalid length, or invalid 1011 zero-length messages when using TLS 1.2. Contributed by Espressif Systems. 1012 * Change the default behaviour of mbedtls_hkdf_extract() to return an error 1013 when calling with a NULL salt and non-zero salt_len. Contributed by 1014 Brian J Murray 1015 * Change the shebang line in Perl scripts to look up perl in the PATH. 1016 Contributed by fbrosson. 1017 * Allow overriding the time on Windows via the platform-time abstraction. 1018 Fixed by Nick Wilson. 1019 * Use gmtime_r/gmtime_s for thread-safety. Fixed by Nick Wilson. 1020 1021= mbed TLS 2.11.0 branch released 2018-06-18 1022 1023Features 1024 * Add additional block mode, OFB (Output Feedback), to the AES module and 1025 cipher abstraction module. 1026 * Implement the HMAC-based extract-and-expand key derivation function 1027 (HKDF) per RFC 5869. Contributed by Thomas Fossati. 1028 * Add support for the CCM* block cipher mode as defined in IEEE Std. 802.15.4. 1029 * Add support for the XTS block cipher mode with AES (AES-XTS). 1030 Contributed by Aorimn in pull request #414. 1031 * In TLS servers, support offloading private key operations to an external 1032 cryptoprocessor. Private key operations can be asynchronous to allow 1033 non-blocking operation of the TLS server stack. 1034 1035Bugfix 1036 * Fix the cert_write example to handle certificates signed with elliptic 1037 curves as well as RSA. Fixes #777 found by dbedev. 1038 * Fix for redefinition of _WIN32_WINNT to avoid overriding a definition 1039 used by user applications. Found and fixed by Fabio Alessandrelli. 1040 * Fix compilation warnings with IAR toolchain, on 32 bit platform. 1041 Reported by rahmanih in #683 1042 * Fix braces in mbedtls_memory_buffer_alloc_status(). Found by sbranden, #552. 1043 1044Changes 1045 * Changed CMake defaults for IAR to treat all compiler warnings as errors. 1046 * Changed the Clang parameters used in the CMake build files to work for 1047 versions later than 3.6. Versions of Clang earlier than this may no longer 1048 work. Fixes #1072 1049 1050= mbed TLS 2.10.0 branch released 2018-06-06 1051 1052Features 1053 * Add support for ARIA cipher (RFC 5794) and associated TLS ciphersuites 1054 (RFC 6209). Disabled by default, see MBEDTLS_ARIA_C in config.h 1055 1056API Changes 1057 * Extend the platform module with a util component that contains 1058 functionality shared by multiple Mbed TLS modules. At this stage 1059 platform_util.h (and its associated platform_util.c) only contain 1060 mbedtls_platform_zeroize(), which is a critical function from a security 1061 point of view. mbedtls_platform_zeroize() needs to be regularly tested 1062 against compilers to ensure that calls to it are not removed from the 1063 output binary as part of redundant code elimination optimizations. 1064 Therefore, mbedtls_platform_zeroize() is moved to the platform module to 1065 facilitate testing and maintenance. 1066 1067Bugfix 1068 * Fix an issue with MicroBlaze support in bn_mul.h which was causing the 1069 build to fail. Found by zv-io. Fixes #1651. 1070 1071Changes 1072 * Support TLS testing in out-of-source builds using cmake. Fixes #1193. 1073 * Fix redundant declaration of mbedtls_ssl_list_ciphersuites. Raised by 1074 TrinityTonic. #1359. 1075 1076= mbed TLS 2.9.0 branch released 2018-04-30 1077 1078Security 1079 * Fix an issue in the X.509 module which could lead to a buffer overread 1080 during certificate validation. Additionally, the issue could also lead to 1081 unnecessary callback checks being made or to some validation checks to be 1082 omitted. The overread could be triggered remotely, while the other issues 1083 would require a non DER-compliant certificate to be correctly signed by a 1084 trusted CA, or a trusted CA with a non DER-compliant certificate. Found by 1085 luocm. Fixes #825. 1086 * Fix the buffer length assertion in the ssl_parse_certificate_request() 1087 function which led to an arbitrary overread of the message buffer. The 1088 overreads could be caused by receiving a malformed message at the point 1089 where an optional signature algorithms list is expected when the signature 1090 algorithms section is too short. In builds with debug output, the overread 1091 data is output with the debug data. 1092 * Fix a client-side bug in the validation of the server's ciphersuite choice 1093 which could potentially lead to the client accepting a ciphersuite it didn't 1094 offer or a ciphersuite that cannot be used with the TLS or DTLS version 1095 chosen by the server. This could lead to corruption of internal data 1096 structures for some configurations. 1097 1098Features 1099 * Add an option, MBEDTLS_AES_FEWER_TABLES, to dynamically compute smaller AES 1100 tables during runtime, thereby reducing the RAM/ROM footprint by ~6KiB. 1101 Suggested and contributed by jkivilin in pull request #394. 1102 * Add initial support for Curve448 (RFC 7748). Only mbedtls_ecp_mul() and 1103 ECDH primitive functions (mbedtls_ecdh_gen_public(), 1104 mbedtls_ecdh_compute_shared()) are supported for now. Contributed by 1105 Nicholas Wilson in pull request #348. 1106 1107API Changes 1108 * Extend the public API with the function of mbedtls_net_poll() to allow user 1109 applications to wait for a network context to become ready before reading 1110 or writing. 1111 * Add function mbedtls_ssl_check_pending() to the public API to allow 1112 a check for whether more more data is pending to be processed in the 1113 internal message buffers. 1114 This function is necessary to determine when it is safe to idle on the 1115 underlying transport in case event-driven IO is used. 1116 1117Bugfix 1118 * Fix a spurious uninitialized variable warning in cmac.c. Fix independently 1119 contributed by Brian J Murray and David Brown. 1120 * Add missing dependencies in test suites that led to build failures 1121 in configurations that omit certain hashes or public-key algorithms. 1122 Fixes #1040. 1123 * Fix C89 incompatibility in benchmark.c. Contributed by Brendan Shanks. 1124 #1353 1125 * Add missing dependencies for MBEDTLS_HAVE_TIME_DATE and 1126 MBEDTLS_VERSION_FEATURES in some test suites. Contributed by 1127 Deomid Ryabkov. Fixes #1299, #1475. 1128 * Fix the Makefile build process for building shared libraries on Mac OS X. 1129 Fixed by mnacamura. 1130 * Fix parsing of PKCS#8 encoded Elliptic Curve keys. Previously Mbed TLS was 1131 unable to parse keys which had only the optional parameters field of the 1132 ECPrivateKey structure. Found by Jethro Beekman, fixed in #1379. 1133 * Return the plaintext data more quickly on unpadded CBC decryption, as 1134 stated in the mbedtls_cipher_update() documentation. Contributed by 1135 Andy Leiserson. 1136 * Fix overriding and ignoring return values when parsing and writing to 1137 a file in pk_sign program. Found by kevlut in #1142. 1138 * Restrict usage of error code MBEDTLS_ERR_SSL_WANT_READ to situations 1139 where data needs to be fetched from the underlying transport in order 1140 to make progress. Previously, this error code was also occasionally 1141 returned when unexpected messages were being discarded, ignoring that 1142 further messages could potentially already be pending to be processed 1143 in the internal buffers; these cases led to deadlocks when event-driven 1144 I/O was used. Found and reported by Hubert Mis in #772. 1145 * Fix buffer length assertions in the ssl_parse_certificate_request() 1146 function which leads to a potential one byte overread of the message 1147 buffer. 1148 * Fix invalid buffer sizes passed to zlib during record compression and 1149 decompression. 1150 * Fix the soversion of libmbedcrypto to match the soversion of the 1151 maintained 2.7 branch. The soversion was increased in Mbed TLS 1152 version 2.7.1 to reflect breaking changes in that release, but the 1153 increment was missed in 2.8.0 and later releases outside of the 2.7 branch. 1154 1155Changes 1156 * Remove some redundant code in bignum.c. Contributed by Alexey Skalozub. 1157 * Support cmake builds where Mbed TLS is a subproject. Fix contributed 1158 independently by Matthieu Volat and Arne Schwabe. 1159 * Improve testing in configurations that omit certain hashes or 1160 public-key algorithms. Includes contributions by Gert van Dijk. 1161 * Improve negative testing of X.509 parsing. 1162 * Do not define global mutexes around readdir() and gmtime() in 1163 configurations where the feature is disabled. Found and fixed by Gergely 1164 Budai. 1165 * Harden the function mbedtls_ssl_config_free() against misuse, so that it 1166 doesn't leak memory if the user doesn't use mbedtls_ssl_conf_psk() and 1167 instead incorrectly manipulates the configuration structure directly. 1168 Found and fix submitted by junyeonLEE in #1220. 1169 * Provide an empty implementation of mbedtls_pkcs5_pbes2() when 1170 MBEDTLS_ASN1_PARSE_C is not enabled. This allows the use of PBKDF2 1171 without PBES2. Fixed by Marcos Del Sol Vives. 1172 * Add the order of the base point as N in the mbedtls_ecp_group structure 1173 for Curve25519 (other curves had it already). Contributed by Nicholas 1174 Wilson #481 1175 * Improve the documentation of mbedtls_net_accept(). Contributed by Ivan 1176 Krylov. 1177 * Improve the documentation of mbedtls_ssl_write(). Suggested by 1178 Paul Sokolovsky in #1356. 1179 * Add an option in the Makefile to support ar utilities where the operation 1180 letter must not be prefixed by '-', such as LLVM. Found and fixed by 1181 Alex Hixon. 1182 * Allow configuring the shared library extension by setting the DLEXT 1183 environment variable when using the project makefiles. 1184 * Optimize unnecessary zeroing in mbedtls_mpi_copy. Based on a contribution 1185 by Alexey Skalozub in #405. 1186 * In the SSL module, when f_send, f_recv or f_recv_timeout report 1187 transmitting more than the required length, return an error. Raised by 1188 Sam O'Connor in #1245. 1189 * Improve robustness of mbedtls_ssl_derive_keys against the use of 1190 HMAC functions with non-HMAC ciphersuites. Independently contributed 1191 by Jiayuan Chen in #1377. Fixes #1437. 1192 * Improve security of RSA key generation by including criteria from 1193 FIPS 186-4. Contributed by Jethro Beekman. #1380 1194 * Declare functions in header files even when an alternative implementation 1195 of the corresponding module is activated by defining the corresponding 1196 MBEDTLS_XXX_ALT macro. This means that alternative implementations do 1197 not need to copy the declarations, and ensures that they will have the 1198 same API. 1199 * Add platform setup and teardown calls in test suites. 1200 1201= mbed TLS 2.8.0 branch released 2018-03-16 1202 1203Default behavior changes 1204 * The truncated HMAC extension now conforms to RFC 6066. This means 1205 that when both sides of a TLS connection negotiate the truncated 1206 HMAC extension, Mbed TLS can now interoperate with other 1207 compliant implementations, but this breaks interoperability with 1208 prior versions of Mbed TLS. To restore the old behavior, enable 1209 the (deprecated) option MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT in 1210 config.h. Found by Andreas Walz (ivESK, Offenburg University of 1211 Applied Sciences). 1212 1213Security 1214 * Fix implementation of the truncated HMAC extension. The previous 1215 implementation allowed an offline 2^80 brute force attack on the 1216 HMAC key of a single, uninterrupted connection (with no 1217 resumption of the session). 1218 * Verify results of RSA private key operations to defend 1219 against Bellcore glitch attack. 1220 * Fix a buffer overread in ssl_parse_server_key_exchange() that could cause 1221 a crash on invalid input. 1222 * Fix a buffer overread in ssl_parse_server_psk_hint() that could cause a 1223 crash on invalid input. 1224 * Fix CRL parsing to reject CRLs containing unsupported critical 1225 extensions. Found by Falko Strenzke and Evangelos Karatsiolis. 1226 1227Features 1228 * Extend PKCS#8 interface by introducing support for the entire SHA 1229 algorithms family when encrypting private keys using PKCS#5 v2.0. 1230 This allows reading encrypted PEM files produced by software that 1231 uses PBKDF2-SHA2, such as OpenSSL 1.1. Submitted by Antonio Quartulli, 1232 OpenVPN Inc. Fixes #1339 1233 * Add support for public keys encoded in PKCS#1 format. #1122 1234 1235New deprecations 1236 * Deprecate support for record compression (configuration option 1237 MBEDTLS_ZLIB_SUPPORT). 1238 1239Bugfix 1240 * Fix the name of a DHE parameter that was accidentally changed in 2.7.0. 1241 Fixes #1358. 1242 * Fix test_suite_pk to work on 64-bit ILP32 systems. #849 1243 * Fix mbedtls_x509_crt_profile_suiteb, which used to reject all certificates 1244 with flag MBEDTLS_X509_BADCERT_BAD_PK even when the key type was correct. 1245 In the context of SSL, this resulted in handshake failure. Reported by 1246 daniel in the Mbed TLS forum. #1351 1247 * Fix Windows x64 builds with the included mbedTLS.sln file. #1347 1248 * Fix setting version TLSv1 as minimal version, even if TLS 1 1249 is not enabled. Set MBEDTLS_SSL_MIN_MAJOR_VERSION 1250 and MBEDTLS_SSL_MIN_MINOR_VERSION instead of 1251 MBEDTLS_SSL_MAJOR_VERSION_3 and MBEDTLS_SSL_MINOR_VERSION_1. #664 1252 * Fix compilation error on Mingw32 when _TRUNCATE is defined. Use _TRUNCATE 1253 only if __MINGW32__ not defined. Fix suggested by Thomas Glanzmann and 1254 Nick Wilson on issue #355 1255 * In test_suite_pk, pass valid parameters when testing for hash length 1256 overflow. #1179 1257 * Fix memory allocation corner cases in memory_buffer_alloc.c module. Found 1258 by Guido Vranken. #639 1259 * Log correct number of ciphersuites used in Client Hello message. #918 1260 * Fix X509 CRT parsing that would potentially accept an invalid tag when 1261 parsing the subject alternative names. 1262 * Fix a possible arithmetic overflow in ssl_parse_server_key_exchange() 1263 that could cause a key exchange to fail on valid data. 1264 * Fix a possible arithmetic overflow in ssl_parse_server_psk_hint() that 1265 could cause a key exchange to fail on valid data. 1266 * Don't define mbedtls_aes_decrypt and mbedtls_aes_encrypt under 1267 MBEDTLS_DEPRECATED_REMOVED. #1388 1268 * Fix a 1-byte heap buffer overflow (read-only) during private key parsing. 1269 Found through fuzz testing. 1270 1271Changes 1272 * Fix tag lengths and value ranges in the documentation of CCM encryption. 1273 Contributed by Mathieu Briand. 1274 * Fix typo in a comment ctr_drbg.c. Contributed by Paul Sokolovsky. 1275 * Remove support for the library reference configuration for picocoin. 1276 * MD functions deprecated in 2.7.0 are no longer inline, to provide 1277 a migration path for those depending on the library's ABI. 1278 * Clarify the documentation of mbedtls_ssl_setup. 1279 * Use (void) when defining functions with no parameters. Contributed by 1280 Joris Aerts. #678 1281 1282= mbed TLS 2.7.0 branch released 2018-02-03 1283 1284Security 1285 * Fix a heap corruption issue in the implementation of the truncated HMAC 1286 extension. When the truncated HMAC extension is enabled and CBC is used, 1287 sending a malicious application packet could be used to selectively corrupt 1288 6 bytes on the peer's heap, which could potentially lead to crash or remote 1289 code execution. The issue could be triggered remotely from either side in 1290 both TLS and DTLS. CVE-2018-0488 1291 * Fix a buffer overflow in RSA-PSS verification when the hash was too large 1292 for the key size, which could potentially lead to crash or remote code 1293 execution. Found by Seth Terashima, Qualcomm Product Security Initiative, 1294 Qualcomm Technologies Inc. CVE-2018-0487 1295 * Fix buffer overflow in RSA-PSS verification when the unmasked data is all 1296 zeros. 1297 * Fix an unsafe bounds check in ssl_parse_client_psk_identity() when adding 1298 64 KiB to the address of the SSL buffer and causing a wrap around. 1299 * Fix a potential heap buffer overflow in mbedtls_ssl_write(). When the (by 1300 default enabled) maximum fragment length extension is disabled in the 1301 config and the application data buffer passed to mbedtls_ssl_write 1302 is larger than the internal message buffer (16384 bytes by default), the 1303 latter overflows. The exploitability of this issue depends on whether the 1304 application layer can be forced into sending such large packets. The issue 1305 was independently reported by Tim Nordell via e-mail and by Florin Petriuc 1306 and sjorsdewit on GitHub. Fix proposed by Florin Petriuc in #1022. 1307 Fixes #707. 1308 * Add a provision to prevent compiler optimizations breaking the time 1309 constancy of mbedtls_ssl_safer_memcmp(). 1310 * Ensure that buffers are cleared after use if they contain sensitive data. 1311 Changes were introduced in multiple places in the library. 1312 * Set PEM buffer to zero before freeing it, to avoid decoded private keys 1313 being leaked to memory after release. 1314 * Fix dhm_check_range() failing to detect trivial subgroups and potentially 1315 leaking 1 bit of the private key. Reported by prashantkspatil. 1316 * Make mbedtls_mpi_read_binary() constant-time with respect to the input 1317 data. Previously, trailing zero bytes were detected and omitted for the 1318 sake of saving memory, but potentially leading to slight timing 1319 differences. Reported by Marco Macchetti, Kudelski Group. 1320 * Wipe stack buffer temporarily holding EC private exponent 1321 after keypair generation. 1322 * Fix a potential heap buffer over-read in ALPN extension parsing 1323 (server-side). Could result in application crash, but only if an ALPN 1324 name larger than 16 bytes had been configured on the server. 1325 * Change default choice of DHE parameters from untrustworthy RFC 5114 1326 to RFC 3526 containing parameters generated in a nothing-up-my-sleeve 1327 manner. 1328 1329Features 1330 * Allow comments in test data files. 1331 * The selftest program can execute a subset of the tests based on command 1332 line arguments. 1333 * New unit tests for timing. Improve the self-test to be more robust 1334 when run on a heavily-loaded machine. 1335 * Add alternative implementation support for CCM and CMAC (MBEDTLS_CCM_ALT, 1336 MBEDTLS_CMAC_ALT). Submitted by Steven Cooreman, Silicon Labs. 1337 * Add support for alternative implementations of GCM, selected by the 1338 configuration flag MBEDTLS_GCM_ALT. 1339 * Add support for alternative implementations for ECDSA, controlled by new 1340 configuration flags MBEDTLS_ECDSA_SIGN_ALT, MBEDTLS_ECDSA_VERIFY_ALT and 1341 MBEDTLS_ECDSDA_GENKEY_AT in config.h. 1342 The following functions from the ECDSA module can be replaced 1343 with alternative implementation: 1344 mbedtls_ecdsa_sign(), mbedtls_ecdsa_verify() and mbedtls_ecdsa_genkey(). 1345 * Add support for alternative implementation of ECDH, controlled by the 1346 new configuration flags MBEDTLS_ECDH_COMPUTE_SHARED_ALT and 1347 MBEDTLS_ECDH_GEN_PUBLIC_ALT in config.h. 1348 The following functions from the ECDH module can be replaced 1349 with an alternative implementation: 1350 mbedtls_ecdh_gen_public() and mbedtls_ecdh_compute_shared(). 1351 * Add support for alternative implementation of ECJPAKE, controlled by 1352 the new configuration flag MBEDTLS_ECJPAKE_ALT. 1353 * Add mechanism to provide alternative implementation of the DHM module. 1354 1355API Changes 1356 * Extend RSA interface by multiple functions allowing structure- 1357 independent setup and export of RSA contexts. Most notably, 1358 mbedtls_rsa_import() and mbedtls_rsa_complete() are introduced for setting 1359 up RSA contexts from partial key material and having them completed to the 1360 needs of the implementation automatically. This allows to setup private RSA 1361 contexts from keys consisting of N,D,E only, even if P,Q are needed for the 1362 purpose or CRT and/or blinding. 1363 * The configuration option MBEDTLS_RSA_ALT can be used to define alternative 1364 implementations of the RSA interface declared in rsa.h. 1365 * The following functions in the message digest modules (MD2, MD4, MD5, 1366 SHA1, SHA256, SHA512) have been deprecated and replaced as shown below. 1367 The new functions change the return type from void to int to allow 1368 returning error codes when using MBEDTLS_<MODULE>_ALT. 1369 mbedtls_<MODULE>_starts() -> mbedtls_<MODULE>_starts_ret() 1370 mbedtls_<MODULE>_update() -> mbedtls_<MODULE>_update_ret() 1371 mbedtls_<MODULE>_finish() -> mbedtls_<MODULE>_finish_ret() 1372 mbedtls_<MODULE>_process() -> mbedtls_internal_<MODULE>_process() 1373 1374New deprecations 1375 * Deprecate usage of RSA primitives with non-matching key-type 1376 (e.g. signing with a public key). 1377 * Direct manipulation of structure fields of RSA contexts is deprecated. 1378 Users are advised to use the extended RSA API instead. 1379 * Deprecate usage of message digest functions that return void 1380 (mbedtls_<MODULE>_starts, mbedtls_<MODULE>_update, 1381 mbedtls_<MODULE>_finish and mbedtls_<MODULE>_process where <MODULE> is 1382 any of MD2, MD4, MD5, SHA1, SHA256, SHA512) in favor of functions 1383 that can return an error code. 1384 * Deprecate untrustworthy DHE parameters from RFC 5114. Superseded by 1385 parameters from RFC 3526 or the newly added parameters from RFC 7919. 1386 * Deprecate hex string DHE constants MBEDTLS_DHM_RFC3526_MODP_2048_P etc. 1387 Supserseded by binary encoded constants MBEDTLS_DHM_RFC3526_MODP_2048_P_BIN 1388 etc. 1389 * Deprecate mbedtls_ssl_conf_dh_param() for setting default DHE parameters 1390 from hex strings. Superseded by mbedtls_ssl_conf_dh_param_bin() 1391 accepting DHM parameters in binary form, matching the new constants. 1392 1393Bugfix 1394 * Fix ssl_parse_record_header() to silently discard invalid DTLS records 1395 as recommended in RFC 6347 Section 4.1.2.7. 1396 * Fix memory leak in mbedtls_ssl_set_hostname() when called multiple times. 1397 Found by projectgus and Jethro Beekman, #836. 1398 * Fix usage help in ssl_server2 example. Found and fixed by Bei Lin. 1399 * Parse signature algorithm extension when renegotiating. Previously, 1400 renegotiated handshakes would only accept signatures using SHA-1 1401 regardless of the peer's preferences, or fail if SHA-1 was disabled. 1402 * Fix leap year calculation in x509_date_is_valid() to ensure that invalid 1403 dates on leap years with 100 and 400 intervals are handled correctly. Found 1404 by Nicholas Wilson. #694 1405 * Fix some invalid RSA-PSS signatures with keys of size 8N+1 that were 1406 accepted. Generating these signatures required the private key. 1407 * Fix out-of-memory problem when parsing 4096-bit PKCS8-encrypted RSA keys. 1408 Found independently by Florian in the mbed TLS forum and by Mishamax. 1409 #878, #1019. 1410 * Fix variable used before assignment compilation warnings with IAR 1411 toolchain. Found by gkerrien38. 1412 * Fix unchecked return codes from AES, DES and 3DES functions in 1413 pem_aes_decrypt(), pem_des_decrypt() and pem_des3_decrypt() respectively. 1414 If a call to one of the functions of the cryptographic primitive modules 1415 failed, the error may not be noticed by the function 1416 mbedtls_pem_read_buffer() causing it to return invalid values. Found by 1417 Guido Vranken. #756 1418 * Include configuration file in md.h, to fix compilation warnings. 1419 Reported by aaronmdjones in #1001 1420 * Correct extraction of signature-type from PK instance in X.509 CRT and CSR 1421 writing routines that prevented these functions to work with alternative 1422 RSA implementations. Raised by J.B. in the Mbed TLS forum. Fixes #1011. 1423 * Don't print X.509 version tag for v1 CRT's, and omit extensions for 1424 non-v3 CRT's. 1425 * Fix bugs in RSA test suite under MBEDTLS_NO_PLATFORM_ENTROPY. #1023 #1024 1426 * Fix net_would_block() to avoid modification by errno through fcntl() call. 1427 Found by nkolban. Fixes #845. 1428 * Fix handling of handshake messages in mbedtls_ssl_read() in case 1429 MBEDTLS_SSL_RENEGOTIATION is disabled. Found by erja-gp. 1430 * Add a check for invalid private parameters in mbedtls_ecdsa_sign(). 1431 Reported by Yolan Romailler. 1432 * Fix word size check in in pk.c to not depend on MBEDTLS_HAVE_INT64. 1433 * Fix incorrect unit in benchmark output. #850 1434 * Add size-checks for record and handshake message content, securing 1435 fragile yet non-exploitable code-paths. 1436 * Fix crash when calling mbedtls_ssl_cache_free() twice. Found by 1437 MilenkoMitrovic, #1104 1438 * Fix mbedtls_timing_alarm(0) on Unix and MinGW. 1439 * Fix use of uninitialized memory in mbedtls_timing_get_timer() when reset=1. 1440 * Fix possible memory leaks in mbedtls_gcm_self_test(). 1441 * Added missing return code checks in mbedtls_aes_self_test(). 1442 * Fix issues in RSA key generation program programs/x509/rsa_genkey and the 1443 RSA test suite where the failure of CTR DRBG initialization lead to 1444 freeing an RSA context and several MPI's without proper initialization 1445 beforehand. 1446 * Fix error message in programs/pkey/gen_key.c. Found and fixed by Chris Xue. 1447 * Fix programs/pkey/dh_server.c so that it actually works with dh_client.c. 1448 Found and fixed by Martijn de Milliano. 1449 * Fix an issue in the cipher decryption with the mode 1450 MBEDTLS_PADDING_ONE_AND_ZEROS that sometimes accepted invalid padding. 1451 Note, this padding mode is not used by the TLS protocol. Found and fixed by 1452 Micha Kraus. 1453 * Fix the entropy.c module to not call mbedtls_sha256_starts() or 1454 mbedtls_sha512_starts() in the mbedtls_entropy_init() function. 1455 * Fix the entropy.c module to ensure that mbedtls_sha256_init() or 1456 mbedtls_sha512_init() is called before operating on the relevant context 1457 structure. Do not assume that zeroizing a context is a correct way to 1458 reset it. Found independently by ccli8 on Github. 1459 * In mbedtls_entropy_free(), properly free the message digest context. 1460 * Fix status handshake status message in programs/ssl/dtls_client.c. Found 1461 and fixed by muddog. 1462 1463Changes 1464 * Extend cert_write example program by options to set the certificate version 1465 and the message digest. Further, allow enabling/disabling of authority 1466 identifier, subject identifier and basic constraints extensions. 1467 * Only check for necessary RSA structure fields in `mbedtls_rsa_private`. In 1468 particular, don't require P,Q if neither CRT nor blinding are 1469 used. Reported and fix proposed independently by satur9nine and sliai 1470 on GitHub. 1471 * Only run AES-192 self-test if AES-192 is available. Fixes #963. 1472 * Tighten the RSA PKCS#1 v1.5 signature verification code and remove the 1473 undeclared dependency of the RSA module on the ASN.1 module. 1474 * Update all internal usage of deprecated message digest functions to the 1475 new ones with return codes. In particular, this modifies the 1476 mbedtls_md_info_t structure. Propagate errors from these functions 1477 everywhere except some locations in the ssl_tls.c module. 1478 * Improve CTR_DRBG error handling by propagating underlying AES errors. 1479 * Add MBEDTLS_ERR_XXX_HW_ACCEL_FAILED error codes for all cryptography 1480 modules where the software implementation can be replaced by a hardware 1481 implementation. 1482 * Add explicit warnings for the use of MD2, MD4, MD5, SHA-1, DES and ARC4 1483 throughout the library. 1484 1485= mbed TLS 2.6.0 branch released 2017-08-10 1486 1487Security 1488 * Fix authentication bypass in SSL/TLS: when authmode is set to optional, 1489 mbedtls_ssl_get_verify_result() would incorrectly return 0 when the peer's 1490 X.509 certificate chain had more than MBEDTLS_X509_MAX_INTERMEDIATE_CA 1491 (default: 8) intermediates, even when it was not trusted. This could be 1492 triggered remotely from either side. (With authmode set to 'required' 1493 (the default), the handshake was correctly aborted). 1494 * Reliably wipe sensitive data after use in the AES example applications 1495 programs/aes/aescrypt2 and programs/aes/crypt_and_hash. 1496 Found by Laurent Simon. 1497 1498Features 1499 * Add the functions mbedtls_platform_setup() and mbedtls_platform_teardown() 1500 and the context struct mbedtls_platform_context to perform 1501 platform-specific setup and teardown operations. The macro 1502 MBEDTLS_PLATFORM_SETUP_TEARDOWN_ALT allows the functions to be overridden 1503 by the user in a platform_alt.h file. These new functions are required in 1504 some embedded environments to provide a means of initialising underlying 1505 cryptographic acceleration hardware. 1506 1507API Changes 1508 * Reverted API/ABI breaking changes introduced in mbed TLS 2.5.1, to make the 1509 API consistent with mbed TLS 2.5.0. Specifically removed the inline 1510 qualifier from the functions mbedtls_aes_decrypt, mbedtls_aes_encrypt, 1511 mbedtls_ssl_ciphersuite_uses_ec and mbedtls_ssl_ciphersuite_uses_psk. Found 1512 by James Cowgill. #978 1513 * Certificate verification functions now set flags to -1 in case the full 1514 chain was not verified due to an internal error (including in the verify 1515 callback) or chain length limitations. 1516 * With authmode set to optional, the TLS handshake is now aborted if the 1517 verification of the peer's certificate failed due to an overlong chain or 1518 a fatal error in the verify callback. 1519 1520Bugfix 1521 * Add a check if iv_len is zero in GCM, and return an error if it is zero. 1522 Reported by roberto. #716 1523 * Replace preprocessor condition from #if defined(MBEDTLS_THREADING_PTHREAD) 1524 to #if defined(MBEDTLS_THREADING_C) as the library cannot assume they will 1525 always be implemented by pthread support. #696 1526 * Fix a resource leak on Windows platforms in mbedtls_x509_crt_parse_path(), 1527 in the case of an error. Found by redplait. #590 1528 * Add MBEDTLS_MPI_CHK to check for error value of mbedtls_mpi_fill_random. 1529 Reported and fix suggested by guidovranken. #740 1530 * Fix conditional preprocessor directives in bignum.h to enable 64-bit 1531 compilation when using ARM Compiler 6. 1532 * Fix a potential integer overflow in the version verification for DER 1533 encoded X.509 CRLs. The overflow could enable maliciously constructed CRLs 1534 to bypass the version verification check. Found by Peng Li/Yueh-Hsun Lin, 1535 KNOX Security, Samsung Research America 1536 * Fix potential integer overflow in the version verification for DER 1537 encoded X.509 CSRs. The overflow could enable maliciously constructed CSRs 1538 to bypass the version verification check. Found by Peng Li/Yueh-Hsun Lin, 1539 KNOX Security, Samsung Research America 1540 * Fix a potential integer overflow in the version verification for DER 1541 encoded X.509 certificates. The overflow could enable maliciously 1542 constructed certificates to bypass the certificate verification check. 1543 * Fix a call to the libc function time() to call the platform abstraction 1544 function mbedtls_time() instead. Found by wairua. #666 1545 * Avoid shadowing of time and index functions through mbed TLS function 1546 arguments. Found by inestlerode. #557. 1547 1548Changes 1549 * Added config.h option MBEDTLS_NO_UDBL_DIVISION, to prevent the use of 1550 64-bit division. This is useful on embedded platforms where 64-bit division 1551 created a dependency on external libraries. #708 1552 * Removed mutexes from ECP hardware accelerator code. Now all hardware 1553 accelerator code in the library leaves concurrency handling to the 1554 platform. Reported by Steven Cooreman. #863 1555 * Define the macro MBEDTLS_AES_ROM_TABLES in the configuration file 1556 config-no-entropy.h to reduce the RAM footprint. 1557 * Added a test script that can be hooked into git that verifies commits 1558 before they are pushed. 1559 * Improve documentation of PKCS1 decryption functions. 1560 1561= mbed TLS 2.5.1 released 2017-06-21 1562 1563Security 1564 * Fixed unlimited overread of heap-based buffer in mbedtls_ssl_read(). 1565 The issue could only happen client-side with renegotiation enabled. 1566 Could result in DoS (application crash) or information leak 1567 (if the application layer sent data read from mbedtls_ssl_read() 1568 back to the server or to a third party). Can be triggered remotely. 1569 * Removed SHA-1 and RIPEMD-160 from the default hash algorithms for 1570 certificate verification. SHA-1 can be turned back on with a compile-time 1571 option if needed. 1572 * Fixed offset in FALLBACK_SCSV parsing that caused TLS server to fail to 1573 detect it sometimes. Reported by Hugo Leisink. #810 1574 * Tighten parsing of RSA PKCS#1 v1.5 signatures, to avoid a 1575 potential Bleichenbacher/BERserk-style attack. 1576 1577Bugfix 1578 * Remove size zero arrays from ECJPAKE test suite. Size zero arrays are not 1579 valid C and they prevented the test from compiling in Visual Studio 2015 1580 and with GCC using the -Wpedantic compilation option. 1581 * Fix insufficient support for signature-hash-algorithm extension, 1582 resulting in compatibility problems with Chrome. Found by hfloyrd. #823 1583 * Fix behaviour that hid the original cause of fatal alerts in some cases 1584 when sending the alert failed. The fix makes sure not to hide the error 1585 that triggered the alert. 1586 * Fix SSLv3 renegotiation behaviour and stop processing data received from 1587 peer after sending a fatal alert to refuse a renegotiation attempt. 1588 Previous behaviour was to keep processing data even after the alert has 1589 been sent. 1590 * Accept empty trusted CA chain in authentication mode 1591 MBEDTLS_SSL_VERIFY_OPTIONAL. Found by Jethro Beekman. #864 1592 * Fix implementation of mbedtls_ssl_parse_certificate() to not annihilate 1593 fatal errors in authentication mode MBEDTLS_SSL_VERIFY_OPTIONAL and to 1594 reflect bad EC curves within verification result. 1595 * Fix bug that caused the modular inversion function to accept the invalid 1596 modulus 1 and therefore to hang. Found by blaufish. #641. 1597 * Fix incorrect sign computation in modular exponentiation when the base is 1598 a negative MPI. Previously the result was always negative. Found by Guido 1599 Vranken. 1600 * Fix a numerical underflow leading to stack overflow in mpi_read_file() 1601 that was triggered uppon reading an empty line. Found by Guido Vranken. 1602 1603Changes 1604 * Send fatal alerts in more cases. The previous behaviour was to skip 1605 sending the fatal alert and just drop the connection. 1606 * Clarify ECDSA documentation and improve the sample code to avoid 1607 misunderstanding and potentially dangerous use of the API. Pointed out 1608 by Jean-Philippe Aumasson. 1609 1610= mbed TLS 2.5.0 branch released 2017-05-17 1611 1612Security 1613 * Wipe stack buffers in RSA private key operations 1614 (rsa_rsaes_pkcs1_v15_decrypt(), rsa_rsaes_oaep_decrypt). Found by Laurent 1615 Simon. 1616 * Add exponent blinding to RSA private operations as a countermeasure 1617 against side-channel attacks like the cache attack described in 1618 https://arxiv.org/abs/1702.08719v2. 1619 Found and fix proposed by Michael Schwarz, Samuel Weiser, Daniel Gruss, 1620 Clémentine Maurice and Stefan Mangard. 1621 1622Features 1623 * Add hardware acceleration support for the Elliptic Curve Point module. 1624 This involved exposing parts of the internal interface to enable 1625 replacing the core functions and adding and alternative, module level 1626 replacement support for enabling the extension of the interface. 1627 * Add a new configuration option to 'mbedtls_ssl_config' to enable 1628 suppressing the CA list in Certificate Request messages. The default 1629 behaviour has not changed, namely every configured CAs name is included. 1630 1631API Changes 1632 * The following functions in the AES module have been deprecated and replaced 1633 by the functions shown below. The new functions change the return type from 1634 void to int to allow returning error codes when using MBEDTLS_AES_ALT, 1635 MBEDTLS_AES_DECRYPT_ALT or MBEDTLS_AES_ENCRYPT_ALT. 1636 mbedtls_aes_decrypt() -> mbedtls_internal_aes_decrypt() 1637 mbedtls_aes_encrypt() -> mbedtls_internal_aes_encrypt() 1638 1639Bugfix 1640 * Remove macros from compat-1.3.h that correspond to deleted items from most 1641 recent versions of the library. Found by Kyle Keen. 1642 * Fixed issue in the Threading module that prevented mutexes from 1643 initialising. Found by sznaider. #667 #843 1644 * Add checks in the PK module for the RSA functions on 64-bit systems. 1645 The PK and RSA modules use different types for passing hash length and 1646 without these checks the type cast could lead to data loss. Found by Guido 1647 Vranken. 1648 1649= mbed TLS 2.4.2 branch released 2017-03-08 1650 1651Security 1652 * Add checks to prevent signature forgeries for very large messages while 1653 using RSA through the PK module in 64-bit systems. The issue was caused by 1654 some data loss when casting a size_t to an unsigned int value in the 1655 functions rsa_verify_wrap(), rsa_sign_wrap(), rsa_alt_sign_wrap() and 1656 mbedtls_pk_sign(). Found by Jean-Philippe Aumasson. 1657 * Fixed potential livelock during the parsing of a CRL in PEM format in 1658 mbedtls_x509_crl_parse(). A string containing a CRL followed by trailing 1659 characters after the footer could result in the execution of an infinite 1660 loop. The issue can be triggered remotely. Found by Greg Zaverucha, 1661 Microsoft. 1662 * Removed MD5 from the allowed hash algorithms for CertificateRequest and 1663 CertificateVerify messages, to prevent SLOTH attacks against TLS 1.2. 1664 Introduced by interoperability fix for #513. 1665 * Fixed a bug that caused freeing a buffer that was allocated on the stack, 1666 when verifying the validity of a key on secp224k1. This could be 1667 triggered remotely for example with a maliciously constructed certificate 1668 and potentially could lead to remote code execution on some platforms. 1669 Reported independently by rongsaws and Aleksandar Nikolic, Cisco Talos 1670 team. #569 CVE-2017-2784 1671 1672Bugfix 1673 * Fix output certificate verification flags set by x509_crt_verify_top() when 1674 traversing a chain of trusted CA. The issue would cause both flags, 1675 MBEDTLS_X509_BADCERT_NOT_TRUSTED and MBEDTLS_X509_BADCERT_EXPIRED, to be 1676 set when the verification conditions are not met regardless of the cause. 1677 Found by Harm Verhagen and inestlerode. #665 #561 1678 * Fix the redefinition of macro ssl_set_bio to an undefined symbol 1679 mbedtls_ssl_set_bio_timeout in compat-1.3.h, by removing it. 1680 Found by omlib-lin. #673 1681 * Fix unused variable/function compilation warnings in pem.c, x509_crt.c and 1682 x509_csr.c that are reported when building mbed TLS with a config.h that 1683 does not define MBEDTLS_PEM_PARSE_C. Found by omnium21. #562 1684 * Fix incorrect renegotiation condition in ssl_check_ctr_renegotiate() that 1685 would compare 64 bits of the record counter instead of 48 bits as indicated 1686 in RFC 6347 Section 4.3.1. This could cause the execution of the 1687 renegotiation routines at unexpected times when the protocol is DTLS. Found 1688 by wariua. #687 1689 * Fixed multiple buffer overreads in mbedtls_pem_read_buffer() when parsing 1690 the input string in PEM format to extract the different components. Found 1691 by Eyal Itkin. 1692 * Fixed potential arithmetic overflow in mbedtls_ctr_drbg_reseed() that could 1693 cause buffer bound checks to be bypassed. Found by Eyal Itkin. 1694 * Fixed potential arithmetic overflows in mbedtls_cipher_update() that could 1695 cause buffer bound checks to be bypassed. Found by Eyal Itkin. 1696 * Fixed potential arithmetic overflow in mbedtls_md2_update() that could 1697 cause buffer bound checks to be bypassed. Found by Eyal Itkin. 1698 * Fixed potential arithmetic overflow in mbedtls_base64_decode() that could 1699 cause buffer bound checks to be bypassed. Found by Eyal Itkin. 1700 * Fixed heap overreads in mbedtls_x509_get_time(). Found by Peng 1701 Li/Yueh-Hsun Lin, KNOX Security, Samsung Research America. 1702 * Fix potential memory leak in mbedtls_x509_crl_parse(). The leak was caused 1703 by missing calls to mbedtls_pem_free() in cases when a 1704 MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT error was encountered. Found and 1705 fix proposed by Guido Vranken. #722 1706 * Fixed the templates used to generate project and solution files for Visual 1707 Studio 2015 as well as the files themselves, to remove a build warning 1708 generated in Visual Studio 2015. Reported by Steve Valliere. #742 1709 * Fix a resource leak in ssl_cookie, when using MBEDTLS_THREADING_C. 1710 Raised and fix suggested by Alan Gillingham in the mbed TLS forum. #771 1711 * Fix 1 byte buffer overflow in mbedtls_mpi_write_string() when the MPI 1712 number to write in hexadecimal is negative and requires an odd number of 1713 digits. Found and fixed by Guido Vranken. 1714 * Fix unlisted DES configuration dependency in some pkparse test cases. Found 1715 by inestlerode. #555 1716 1717= mbed TLS 2.4.1 branch released 2016-12-13 1718 1719Changes 1720 * Update to CMAC test data, taken from - NIST Special Publication 800-38B - 1721 Recommendation for Block Cipher Modes of Operation: The CMAC Mode for 1722 Authentication – October 2016 1723 1724= mbed TLS 2.4.0 branch released 2016-10-17 1725 1726Security 1727 * Removed the MBEDTLS_SSL_AEAD_RANDOM_IV option, because it was not compliant 1728 with RFC-5116 and could lead to session key recovery in very long TLS 1729 sessions. "Nonce-Disrespecting Adversaries Practical Forgery Attacks on GCM in 1730 TLS" - H. Bock, A. Zauner, S. Devlin, J. Somorovsky, P. Jovanovic. 1731 https://eprint.iacr.org/2016/475.pdf 1732 * Fixed potential stack corruption in mbedtls_x509write_crt_der() and 1733 mbedtls_x509write_csr_der() when the signature is copied to the buffer 1734 without checking whether there is enough space in the destination. The 1735 issue cannot be triggered remotely. Found by Jethro Beekman. 1736 1737Features 1738 * Added support for CMAC for AES and 3DES and AES-CMAC-PRF-128, as defined by 1739 NIST SP 800-38B, RFC-4493 and RFC-4615. 1740 * Added hardware entropy selftest to verify that the hardware entropy source 1741 is functioning correctly. 1742 * Added a script to print build environment info for diagnostic use in test 1743 scripts, which is also now called by all.sh. 1744 * Added the macro MBEDTLS_X509_MAX_FILE_PATH_LEN that enables the user to 1745 configure the maximum length of a file path that can be buffered when 1746 calling mbedtls_x509_crt_parse_path(). 1747 * Added a configuration file config-no-entropy.h that configures the subset of 1748 library features that do not require an entropy source. 1749 * Added the macro MBEDTLS_ENTROPY_MIN_HARDWARE in config.h. This allows users 1750 to configure the minimum number of bytes for entropy sources using the 1751 mbedtls_hardware_poll() function. 1752 1753Bugfix 1754 * Fix for platform time abstraction to avoid dependency issues where a build 1755 may need time but not the standard C library abstraction, and added 1756 configuration consistency checks to check_config.h 1757 * Fix dependency issue in Makefile to allow parallel builds. 1758 * Fix incorrect handling of block lengths in crypt_and_hash.c sample program, 1759 when GCM is used. Found by udf2457. #441 1760 * Fix for key exchanges based on ECDH-RSA or ECDH-ECDSA which weren't 1761 enabled unless others were also present. Found by David Fernandez. #428 1762 * Fix for out-of-tree builds using CMake. Found by jwurzer, and fix based on 1763 a contribution from Tobias Tangemann. #541 1764 * Fixed cert_app.c sample program for debug output and for use when no root 1765 certificates are provided. 1766 * Fix conditional statement that would cause a 1 byte overread in 1767 mbedtls_asn1_get_int(). Found and fixed by Guido Vranken. #599 1768 * Fixed pthread implementation to avoid unintended double initialisations 1769 and double frees. Found by Niklas Amnebratt. 1770 * Fixed the sample applications gen_key.c, cert_req.c and cert_write.c for 1771 builds where the configuration MBEDTLS_PEM_WRITE_C is not defined. Found 1772 by inestlerode. #559. 1773 * Fix mbedtls_x509_get_sig() to update the ASN1 type in the mbedtls_x509_buf 1774 data structure until after error checks are successful. Found by 1775 subramanyam-c. #622 1776 * Fix documentation and implementation missmatch for function arguments of 1777 mbedtls_gcm_finish(). Found by cmiatpaar. #602 1778 * Guarantee that P>Q at RSA key generation. Found by inestlerode. #558 1779 * Fix potential byte overread when verifying malformed SERVER_HELLO in 1780 ssl_parse_hello_verify_request() for DTLS. Found by Guido Vranken. 1781 * Fix check for validity of date when parsing in mbedtls_x509_get_time(). 1782 Found by subramanyam-c. #626 1783 * Fix compatibility issue with Internet Explorer client authentication, 1784 where the limited hash choices prevented the client from sending its 1785 certificate. Found by teumas. #513 1786 * Fix compilation without MBEDTLS_SELF_TEST enabled. 1787 1788Changes 1789 * Extended test coverage of special cases, and added new timing test suite. 1790 * Removed self-tests from the basic-built-test.sh script, and added all 1791 missing self-tests to the test suites, to ensure self-tests are only 1792 executed once. 1793 * Added support for 3 and 4 byte lengths to mbedtls_asn1_write_len(). 1794 * Added support for a Yotta specific configuration file - 1795 through the symbol YOTTA_CFG_MBEDTLS_TARGET_CONFIG_FILE. 1796 * Added optimization for code space for X.509/OID based on configured 1797 features. Contributed by Aviv Palivoda. 1798 * Renamed source file library/net.c to library/net_sockets.c to avoid 1799 naming collision in projects which also have files with the common name 1800 net.c. For consistency, the corresponding header file, net.h, is marked as 1801 deprecated, and its contents moved to net_sockets.h. 1802 * Changed the strategy for X.509 certificate parsing and validation, to no 1803 longer disregard certificates with unrecognised fields. 1804 1805= mbed TLS 2.3.0 branch released 2016-06-28 1806 1807Security 1808 * Fix missing padding length check in mbedtls_rsa_rsaes_pkcs1_v15_decrypt 1809 required by PKCS1 v2.2 1810 * Fix potential integer overflow to buffer overflow in 1811 mbedtls_rsa_rsaes_pkcs1_v15_encrypt and mbedtls_rsa_rsaes_oaep_encrypt 1812 (not triggerable remotely in (D)TLS). 1813 * Fix a potential integer underflow to buffer overread in 1814 mbedtls_rsa_rsaes_oaep_decrypt. It is not triggerable remotely in 1815 SSL/TLS. 1816 1817Features 1818 * Support for platform abstraction of the standard C library time() 1819 function. 1820 1821Bugfix 1822 * Fix bug in mbedtls_mpi_add_mpi() that caused wrong results when the three 1823 arguments where the same (in-place doubling). Found and fixed by Janos 1824 Follath. #309 1825 * Fix potential build failures related to the 'apidoc' target, introduced 1826 in the previous patch release. Found by Robert Scheck. #390 #391 1827 * Fix issue in Makefile that prevented building using armar. #386 1828 * Fix memory leak that occurred only when ECJPAKE was enabled and ECDHE and 1829 ECDSA was disabled in config.h . The leak didn't occur by default. 1830 * Fix an issue that caused valid certificates to be rejected whenever an 1831 expired or not yet valid certificate was parsed before a valid certificate 1832 in the trusted certificate list. 1833 * Fix bug in mbedtls_x509_crt_parse that caused trailing extra data in the 1834 buffer after DER certificates to be included in the raw representation. 1835 * Fix issue that caused a hang when generating RSA keys of odd bitlength 1836 * Fix bug in mbedtls_rsa_rsaes_pkcs1_v15_encrypt that made null pointer 1837 dereference possible. 1838 * Fix issue that caused a crash if invalid curves were passed to 1839 mbedtls_ssl_conf_curves. #373 1840 * Fix issue in ssl_fork_server which was preventing it from functioning. #429 1841 * Fix memory leaks in test framework 1842 * Fix test in ssl-opt.sh that does not run properly with valgrind 1843 * Fix unchecked calls to mmbedtls_md_setup(). Fix by Brian Murray. #502 1844 1845Changes 1846 * On ARM platforms, when compiling with -O0 with GCC, Clang or armcc5, 1847 don't use the optimized assembly for bignum multiplication. This removes 1848 the need to pass -fomit-frame-pointer to avoid a build error with -O0. 1849 * Disabled SSLv3 in the default configuration. 1850 * Optimized mbedtls_mpi_zeroize() for MPI integer size. (Fix by Alexey 1851 Skalozub). 1852 * Fix non-compliance server extension handling. Extensions for SSLv3 are now 1853 ignored, as required by RFC6101. 1854 1855= mbed TLS 2.2.1 released 2016-01-05 1856 1857Security 1858 * Fix potential double free when mbedtls_asn1_store_named_data() fails to 1859 allocate memory. Only used for certificate generation, not triggerable 1860 remotely in SSL/TLS. Found by Rafał Przywara. #367 1861 * Disable MD5 handshake signatures in TLS 1.2 by default to prevent the 1862 SLOTH attack on TLS 1.2 server authentication (other attacks from the 1863 SLOTH paper do not apply to any version of mbed TLS or PolarSSL). 1864 https://www.mitls.org/pages/attacks/SLOTH 1865 1866Bugfix 1867 * Fix over-restrictive length limit in GCM. Found by Andreas-N. #362 1868 * Fix bug in certificate validation that caused valid chains to be rejected 1869 when the first intermediate certificate has pathLenConstraint=0. Found by 1870 Nicholas Wilson. Introduced in mbed TLS 2.2.0. #280 1871 * Removed potential leak in mbedtls_rsa_rsassa_pkcs1_v15_sign(), found by 1872 JayaraghavendranK. #372 1873 * Fix suboptimal handling of unexpected records that caused interop issues 1874 with some peers over unreliable links. Avoid dropping an entire DTLS 1875 datagram if a single record in a datagram is unexpected, instead only 1876 drop the record and look at subsequent records (if any are present) in 1877 the same datagram. Found by jeannotlapin. #345 1878 1879= mbed TLS 2.2.0 released 2015-11-04 1880 1881Security 1882 * Fix potential double free if mbedtls_ssl_conf_psk() is called more than 1883 once and some allocation fails. Cannot be forced remotely. Found by Guido 1884 Vranken, Intelworks. 1885 * Fix potential heap corruption on Windows when 1886 mbedtls_x509_crt_parse_path() is passed a path longer than 2GB. Cannot be 1887 triggered remotely. Found by Guido Vranken, Intelworks. 1888 * Fix potential buffer overflow in some asn1_write_xxx() functions. 1889 Cannot be triggered remotely unless you create X.509 certificates based 1890 on untrusted input or write keys of untrusted origin. Found by Guido 1891 Vranken, Intelworks. 1892 * The X509 max_pathlen constraint was not enforced on intermediate 1893 certificates. Found by Nicholas Wilson, fix and tests provided by 1894 Janos Follath. #280 and #319 1895 1896Features 1897 * Experimental support for EC J-PAKE as defined in Thread 1.0.0. 1898 Disabled by default as the specification might still change. 1899 * Added a key extraction callback to accees the master secret and key 1900 block. (Potential uses include EAP-TLS and Thread.) 1901 1902Bugfix 1903 * Self-signed certificates were not excluded from pathlen counting, 1904 resulting in some valid X.509 being incorrectly rejected. Found and fix 1905 provided by Janos Follath. #319 1906 * Fix build error with configurations where ECDHE-PSK is the only key 1907 exchange. Found and fix provided by Chris Hammond. #270 1908 * Fix build error with configurations where RSA, RSA-PSK, ECDH-RSA or 1909 ECHD-ECDSA if the only key exchange. Multiple reports. #310 1910 * Fixed a bug causing some handshakes to fail due to some non-fatal alerts 1911 not being properly ignored. Found by mancha and Kasom Koht-arsa, #308 1912 * mbedtls_x509_crt_verify(_with_profile)() now also checks the key type and 1913 size/curve against the profile. Before that, there was no way to set a 1914 minimum key size for end-entity certificates with RSA keys. Found by 1915 Matthew Page of Scannex Electronics Ltd. 1916 * Fix failures in MPI on Sparc(64) due to use of bad assembly code. 1917 Found by Kurt Danielson. #292 1918 * Fix typo in name of the extKeyUsage OID. Found by inestlerode, #314 1919 * Fix bug in ASN.1 encoding of booleans that caused generated CA 1920 certificates to be rejected by some applications, including OS X 1921 Keychain. Found and fixed by Jonathan Leroy, Inikup. 1922 1923Changes 1924 * Improved performance of mbedtls_ecp_muladd() when one of the scalars is 1 1925 or -1. 1926 1927= mbed TLS 2.1.2 released 2015-10-06 1928 1929Security 1930 * Added fix for CVE-2015-5291 to prevent heap corruption due to buffer 1931 overflow of the hostname or session ticket. Found by Guido Vranken, 1932 Intelworks. 1933 * Fix potential double-free if mbedtls_ssl_set_hs_psk() is called more than 1934 once in the same handhake and mbedtls_ssl_conf_psk() was used. 1935 Found and patch provided by Guido Vranken, Intelworks. Cannot be forced 1936 remotely. 1937 * Fix stack buffer overflow in pkcs12 decryption (used by 1938 mbedtls_pk_parse_key(file)() when the password is > 129 bytes. 1939 Found by Guido Vranken, Intelworks. Not triggerable remotely. 1940 * Fix potential buffer overflow in mbedtls_mpi_read_string(). 1941 Found by Guido Vranken, Intelworks. Not exploitable remotely in the context 1942 of TLS, but might be in other uses. On 32 bit machines, requires reading a 1943 string of close to or larger than 1GB to exploit; on 64 bit machines, would 1944 require reading a string of close to or larger than 2^62 bytes. 1945 * Fix potential random memory allocation in mbedtls_pem_read_buffer() 1946 on crafted PEM input data. Found and fix provided by Guido Vranken, 1947 Intelworks. Not triggerable remotely in TLS. Triggerable remotely if you 1948 accept PEM data from an untrusted source. 1949 * Fix possible heap buffer overflow in base64_encoded() when the input 1950 buffer is 512MB or larger on 32-bit platforms. Found by Guido Vranken, 1951 Intelworks. Not trigerrable remotely in TLS. 1952 * Fix potential double-free if mbedtls_conf_psk() is called repeatedly on 1953 the same mbedtls_ssl_config object and memory allocation fails. Found by 1954 Guido Vranken, Intelworks. Cannot be forced remotely. 1955 * Fix potential heap buffer overflow in servers that perform client 1956 authentication against a crafted CA cert. Cannot be triggered remotely 1957 unless you allow third parties to pick trust CAs for client auth. 1958 Found by Guido Vranken, Intelworks. 1959 1960Bugfix 1961 * Fix compile error in net.c with musl libc. Found and patch provided by 1962 zhasha (#278). 1963 * Fix macroization of 'inline' keyword when building as C++. (#279) 1964 1965Changes 1966 * Added checking of hostname length in mbedtls_ssl_set_hostname() to ensure 1967 domain names are compliant with RFC 1035. 1968 * Fixed paths for check_config.h in example config files. (Found by bachp) 1969 (#291) 1970 1971= mbed TLS 2.1.1 released 2015-09-17 1972 1973Security 1974 * Add countermeasure against Lenstra's RSA-CRT attack for PKCS#1 v1.5 1975 signatures. (Found by Florian Weimer, Red Hat.) 1976 https://securityblog.redhat.com/2015/09/02/factoring-rsa-keys-with-tls-perfect-forward-secrecy/ 1977 * Fix possible client-side NULL pointer dereference (read) when the client 1978 tries to continue the handshake after it failed (a misuse of the API). 1979 (Found and patch provided by Fabian Foerg, Gotham Digital Science using 1980 afl-fuzz.) 1981 1982Bugfix 1983 * Fix warning when using a 64bit platform. (found by embedthis) (#275) 1984 * Fix off-by-one error in parsing Supported Point Format extension that 1985 caused some handshakes to fail. 1986 1987Changes 1988 * Made X509 profile pointer const in mbedtls_ssl_conf_cert_profile() to allow 1989 use of mbedtls_x509_crt_profile_next. (found by NWilson) 1990 * When a client initiates a reconnect from the same port as a live 1991 connection, if cookie verification is available 1992 (MBEDTLS_SSL_DTLS_HELLO_VERIFY defined in config.h, and usable cookie 1993 callbacks set with mbedtls_ssl_conf_dtls_cookies()), this will be 1994 detected and mbedtls_ssl_read() will return 1995 MBEDTLS_ERR_SSL_CLIENT_RECONNECT - it is then possible to start a new 1996 handshake with the same context. (See RFC 6347 section 4.2.8.) 1997 1998= mbed TLS 2.1.0 released 2015-09-04 1999 2000Features 2001 * Added support for yotta as a build system. 2002 * Primary open source license changed to Apache 2.0 license. 2003 2004Bugfix 2005 * Fix segfault in the benchmark program when benchmarking DHM. 2006 * Fix build error with CMake and pre-4.5 versions of GCC (found by Hugo 2007 Leisink). 2008 * Fix bug when parsing a ServerHello without extensions (found by David 2009 Sears). 2010 * Fix bug in CMake lists that caused libmbedcrypto.a not to be installed 2011 (found by Benoit Lecocq). 2012 * Fix bug in Makefile that caused libmbedcrypto and libmbedx509 not to be 2013 installed (found by Rawi666). 2014 * Fix compile error with armcc 5 with --gnu option. 2015 * Fix bug in Makefile that caused programs not to be installed correctly 2016 (found by robotanarchy) (#232). 2017 * Fix bug in Makefile that prevented from installing without building the 2018 tests (found by robotanarchy) (#232). 2019 * Fix missing -static-libgcc when building shared libraries for Windows 2020 with make. 2021 * Fix link error when building shared libraries for Windows with make. 2022 * Fix error when loading libmbedtls.so. 2023 * Fix bug in mbedtls_ssl_conf_default() that caused the default preset to 2024 be always used (found by dcb314) (#235) 2025 * Fix bug in mbedtls_rsa_public() and mbedtls_rsa_private() that could 2026 result trying to unlock an unlocked mutex on invalid input (found by 2027 Fredrik Axelsson) (#257) 2028 * Fix -Wshadow warnings (found by hnrkp) (#240) 2029 * Fix memory corruption on client with overlong PSK identity, around 2030 SSL_MAX_CONTENT_LEN or higher - not triggerrable remotely (found by 2031 Aleksandrs Saveljevs) (#238) 2032 * Fix unused function warning when using MBEDTLS_MDx_ALT or 2033 MBEDTLS_SHAxxx_ALT (found by Henrik) (#239) 2034 * Fix memory corruption in pkey programs (found by yankuncheng) (#210) 2035 2036Changes 2037 * The PEM parser now accepts a trailing space at end of lines (#226). 2038 * It is now possible to #include a user-provided configuration file at the 2039 end of the default config.h by defining MBEDTLS_USER_CONFIG_FILE on the 2040 compiler's command line. 2041 * When verifying a certificate chain, if an intermediate certificate is 2042 trusted, no later cert is checked. (suggested by hannes-landeholm) 2043 (#220). 2044 * Prepend a "thread identifier" to debug messages (issue pointed out by 2045 Hugo Leisink) (#210). 2046 * Add mbedtls_ssl_get_max_frag_len() to query the current maximum fragment 2047 length. 2048 2049= mbed TLS 2.0.0 released 2015-07-13 2050 2051Features 2052 * Support for DTLS 1.0 and 1.2 (RFC 6347). 2053 * Ability to override core functions from MDx, SHAx, AES and DES modules 2054 with custom implementation (eg hardware accelerated), complementing the 2055 ability to override the whole module. 2056 * New server-side implementation of session tickets that rotate keys to 2057 preserve forward secrecy, and allows sharing across multiple contexts. 2058 * Added a concept of X.509 cerificate verification profile that controls 2059 which algorithms and key sizes (curves for ECDSA) are acceptable. 2060 * Expanded configurability of security parameters in the SSL module with 2061 mbedtls_ssl_conf_dhm_min_bitlen() and mbedtls_ssl_conf_sig_hashes(). 2062 * Introduced a concept of presets for SSL security-relevant configuration 2063 parameters. 2064 2065API Changes 2066 * The library has been split into libmbedcrypto, libmbedx509, libmbedtls. 2067 You now need to link to all of them if you use TLS for example. 2068 * All public identifiers moved to the mbedtls_* or MBEDTLS_* namespace. 2069 Some names have been further changed to make them more consistent. 2070 Migration helpers scripts/rename.pl and include/mbedtls/compat-1.3.h are 2071 provided. Full list of renamings in scripts/data_files/rename-1.3-2.0.txt 2072 * Renamings of fields inside structures, not covered by the previous list: 2073 mbedtls_cipher_info_t.key_length -> key_bitlen 2074 mbedtls_cipher_context_t.key_length -> key_bitlen 2075 mbedtls_ecp_curve_info.size -> bit_size 2076 * Headers are now found in the 'mbedtls' directory (previously 'polarssl'). 2077 * The following _init() functions that could return errors have 2078 been split into an _init() that returns void and another function that 2079 should generally be the first function called on this context after init: 2080 mbedtls_ssl_init() -> mbedtls_ssl_setup() 2081 mbedtls_ccm_init() -> mbedtls_ccm_setkey() 2082 mbedtls_gcm_init() -> mbedtls_gcm_setkey() 2083 mbedtls_hmac_drbg_init() -> mbedtls_hmac_drbg_seed(_buf)() 2084 mbedtls_ctr_drbg_init() -> mbedtls_ctr_drbg_seed() 2085 Note that for mbedtls_ssl_setup(), you need to be done setting up the 2086 ssl_config structure before calling it. 2087 * Most ssl_set_xxx() functions (all except ssl_set_bio(), ssl_set_hostname(), 2088 ssl_set_session() and ssl_set_client_transport_id(), plus 2089 ssl_legacy_renegotiation()) have been renamed to mbedtls_ssl_conf_xxx() 2090 (see rename.pl and compat-1.3.h above) and their first argument's type 2091 changed from ssl_context to ssl_config. 2092 * ssl_set_bio() changed signature (contexts merged, order switched, one 2093 additional callback for read-with-timeout). 2094 * The following functions have been introduced and must be used in callback 2095 implementations (SNI, PSK) instead of their *conf counterparts: 2096 mbedtls_ssl_set_hs_own_cert() 2097 mbedtls_ssl_set_hs_ca_chain() 2098 mbedtls_ssl_set_hs_psk() 2099 * mbedtls_ssl_conf_ca_chain() lost its last argument (peer_cn), now set 2100 using mbedtls_ssl_set_hostname(). 2101 * mbedtls_ssl_conf_session_cache() changed prototype (only one context 2102 pointer, parameters reordered). 2103 * On server, mbedtls_ssl_conf_session_tickets_cb() must now be used in 2104 place of mbedtls_ssl_conf_session_tickets() to enable session tickets. 2105 * The SSL debug callback gained two new arguments (file name, line number). 2106 * Debug modes were removed. 2107 * mbedtls_ssl_conf_truncated_hmac() now returns void. 2108 * mbedtls_memory_buffer_alloc_init() now returns void. 2109 * X.509 verification flags are now an uint32_t. Affect the signature of: 2110 mbedtls_ssl_get_verify_result() 2111 mbedtls_x509_ctr_verify_info() 2112 mbedtls_x509_crt_verify() (flags, f_vrfy -> needs to be updated) 2113 mbedtls_ssl_conf_verify() (f_vrfy -> needs to be updated) 2114 * The following functions changed prototype to avoid an in-out length 2115 parameter: 2116 mbedtls_base64_encode() 2117 mbedtls_base64_decode() 2118 mbedtls_mpi_write_string() 2119 mbedtls_dhm_calc_secret() 2120 * In the NET module, all "int" and "int *" arguments for file descriptors 2121 changed type to "mbedtls_net_context *". 2122 * net_accept() gained new arguments for the size of the client_ip buffer. 2123 * In the threading layer, mbedtls_mutex_init() and mbedtls_mutex_free() now 2124 return void. 2125 * ecdsa_write_signature() gained an additional md_alg argument and 2126 ecdsa_write_signature_det() was deprecated. 2127 * pk_sign() no longer accepts md_alg == POLARSSL_MD_NONE with ECDSA. 2128 * Last argument of x509_crt_check_key_usage() and 2129 mbedtls_x509write_crt_set_key_usage() changed from int to unsigned. 2130 * test_ca_list (from certs.h) is renamed to test_cas_pem and is only 2131 available if POLARSSL_PEM_PARSE_C is defined (it never worked without). 2132 * Test certificates in certs.c are no longer guaranteed to be nul-terminated 2133 strings; use the new *_len variables instead of strlen(). 2134 * Functions mbedtls_x509_xxx_parse(), mbedtls_pk_parse_key(), 2135 mbedtls_pk_parse_public_key() and mbedtls_dhm_parse_dhm() now expect the 2136 length parameter to include the terminating null byte for PEM input. 2137 * Signature of mpi_mul_mpi() changed to make the last argument unsigned 2138 * calloc() is now used instead of malloc() everywhere. API of platform 2139 layer and the memory_buffer_alloc module changed accordingly. 2140 (Thanks to Mansour Moufid for helping with the replacement.) 2141 * Change SSL_DISABLE_RENEGOTIATION config.h flag to SSL_RENEGOTIATION 2142 (support for renegotiation now needs explicit enabling in config.h). 2143 * Split MBEDTLS_HAVE_TIME into MBEDTLS_HAVE_TIME and MBEDTLS_HAVE_TIME_DATE 2144 in config.h 2145 * net_connect() and net_bind() have a new 'proto' argument to choose 2146 between TCP and UDP, using the macros NET_PROTO_TCP or NET_PROTO_UDP. 2147 Their 'port' argument type is changed to a string. 2148 * Some constness fixes 2149 2150Removals 2151 * Removed mbedtls_ecp_group_read_string(). Only named groups are supported. 2152 * Removed mbedtls_ecp_sub() and mbedtls_ecp_add(), use 2153 mbedtls_ecp_muladd(). 2154 * Removed individual mdX_hmac, shaX_hmac, mdX_file and shaX_file functions 2155 (use generic functions from md.h) 2156 * Removed mbedtls_timing_msleep(). Use mbedtls_net_usleep() or a custom 2157 waiting function. 2158 * Removed test DHM parameters from the test certs module. 2159 * Removed the PBKDF2 module (use PKCS5). 2160 * Removed POLARSSL_ERROR_STRERROR_BC (use mbedtls_strerror()). 2161 * Removed compat-1.2.h (helper for migrating from 1.2 to 1.3). 2162 * Removed openssl.h (very partial OpenSSL compatibility layer). 2163 * Configuration options POLARSSL_HAVE_LONGLONG was removed (now always on). 2164 * Configuration options POLARSSL_HAVE_INT8 and POLARSSL_HAVE_INT16 have 2165 been removed (compiler is required to support 32-bit operations). 2166 * Configuration option POLARSSL_HAVE_IPV6 was removed (always enabled). 2167 * Removed test program o_p_test, the script compat.sh does more. 2168 * Removed test program ssl_test, superseded by ssl-opt.sh. 2169 * Removed helper script active-config.pl 2170 2171New deprecations 2172 * md_init_ctx() is deprecated in favour of md_setup(), that adds a third 2173 argument (allowing memory savings if HMAC is not used) 2174 2175Semi-API changes (technically public, morally private) 2176 * Renamed a few headers to include _internal in the name. Those headers are 2177 not supposed to be included by users. 2178 * Changed md_info_t into an opaque structure (use md_get_xxx() accessors). 2179 * Changed pk_info_t into an opaque structure. 2180 * Changed cipher_base_t into an opaque structure. 2181 * Removed sig_oid2 and rename sig_oid1 to sig_oid in x509_crt and x509_crl. 2182 * x509_crt.key_usage changed from unsigned char to unsigned int. 2183 * Removed r and s from ecdsa_context 2184 * Removed mode from des_context and des3_context 2185 2186Default behavior changes 2187 * The default minimum TLS version is now TLS 1.0. 2188 * RC4 is now blacklisted by default in the SSL/TLS layer, and excluded from the 2189 default ciphersuite list returned by ssl_list_ciphersuites() 2190 * Support for receiving SSLv2 ClientHello is now disabled by default at 2191 compile time. 2192 * The default authmode for SSL/TLS clients is now REQUIRED. 2193 * Support for RSA_ALT contexts in the PK layer is now optional. Since is is 2194 enabled in the default configuration, this is only noticeable if using a 2195 custom config.h 2196 * Default DHM parameters server-side upgraded from 1024 to 2048 bits. 2197 * A minimum RSA key size of 2048 bits is now enforced during ceritificate 2198 chain verification. 2199 * Negotiation of truncated HMAC is now disabled by default on server too. 2200 * The following functions are now case-sensitive: 2201 mbedtls_cipher_info_from_string() 2202 mbedtls_ecp_curve_info_from_name() 2203 mbedtls_md_info_from_string() 2204 mbedtls_ssl_ciphersuite_from_string() 2205 mbedtls_version_check_feature() 2206 2207Requirement changes 2208 * The minimum MSVC version required is now 2010 (better C99 support). 2209 * The NET layer now unconditionnaly relies on getaddrinfo() and select(). 2210 * Compiler is required to support C99 types such as long long and uint32_t. 2211 2212API changes from the 1.4 preview branch 2213 * ssl_set_bio_timeout() was removed, split into mbedtls_ssl_set_bio() with 2214 new prototype, and mbedtls_ssl_set_read_timeout(). 2215 * The following functions now return void: 2216 mbedtls_ssl_conf_transport() 2217 mbedtls_ssl_conf_max_version() 2218 mbedtls_ssl_conf_min_version() 2219 * DTLS no longer hard-depends on TIMING_C, but uses a callback interface 2220 instead, see mbedtls_ssl_set_timer_cb(), with the Timing module providing 2221 an example implementation, see mbedtls_timing_delay_context and 2222 mbedtls_timing_set/get_delay(). 2223 * With UDP sockets, it is no longer necessary to call net_bind() again 2224 after a successful net_accept(). 2225 2226Changes 2227 * mbedtls_ctr_drbg_random() and mbedtls_hmac_drbg_random() are now 2228 thread-safe if MBEDTLS_THREADING_C is enabled. 2229 * Reduced ROM fooprint of SHA-256 and added an option to reduce it even 2230 more (at the expense of performance) MBEDTLS_SHA256_SMALLER. 2231 2232= mbed TLS 1.3 branch 2233 2234Security 2235 * With authmode set to SSL_VERIFY_OPTIONAL, verification of keyUsage and 2236 extendedKeyUsage on the leaf certificate was lost (results not accessible 2237 via ssl_get_verify_results()). 2238 * Add countermeasure against "Lucky 13 strikes back" cache-based attack, 2239 https://dl.acm.org/citation.cfm?id=2714625 2240 2241Features 2242 * Improve ECC performance by using more efficient doubling formulas 2243 (contributed by Peter Dettman). 2244 * Add x509_crt_verify_info() to display certificate verification results. 2245 * Add support for reading DH parameters with privateValueLength included 2246 (contributed by Daniel Kahn Gillmor). 2247 * Add support for bit strings in X.509 names (request by Fredrik Axelsson). 2248 * Add support for id-at-uniqueIdentifier in X.509 names. 2249 * Add support for overriding snprintf() (except on Windows) and exit() in 2250 the platform layer. 2251 * Add an option to use macros instead of function pointers in the platform 2252 layer (helps get rid of unwanted references). 2253 * Improved Makefiles for Windows targets by fixing library targets and making 2254 cross-compilation easier (thanks to Alon Bar-Lev). 2255 * The benchmark program also prints heap usage for public-key primitives 2256 if POLARSSL_MEMORY_BUFFER_ALLOC_C and POLARSSL_MEMORY_DEBUG are defined. 2257 * New script ecc-heap.sh helps measuring the impact of ECC parameters on 2258 speed and RAM (heap only for now) usage. 2259 * New script memory.sh helps measuring the ROM and RAM requirements of two 2260 reduced configurations (PSK-CCM and NSA suite B). 2261 * Add config flag POLARSSL_DEPRECATED_WARNING (off by default) to produce 2262 warnings on use of deprecated functions (with GCC and Clang only). 2263 * Add config flag POLARSSL_DEPRECATED_REMOVED (off by default) to produce 2264 errors on use of deprecated functions. 2265 2266Bugfix 2267 * Fix compile errors with PLATFORM_NO_STD_FUNCTIONS. 2268 * Fix compile error with PLATFORM_EXIT_ALT (thanks to Rafał Przywara). 2269 * Fix bug in entropy.c when THREADING_C is also enabled that caused 2270 entropy_free() to crash (thanks to Rafał Przywara). 2271 * Fix memory leak when gcm_setkey() and ccm_setkey() are used more than 2272 once on the same context. 2273 * Fix bug in ssl_mail_client when password is longer that username (found 2274 by Bruno Pape). 2275 * Fix undefined behaviour (memcmp( NULL, NULL, 0 );) in X.509 modules 2276 (detected by Clang's 3.6 UBSan). 2277 * mpi_size() and mpi_msb() would segfault when called on an mpi that is 2278 initialized but not set (found by pravic). 2279 * Fix detection of support for getrandom() on Linux (reported by syzzer) by 2280 doing it at runtime (using uname) rather that compile time. 2281 * Fix handling of symlinks by "make install" (found by Gaël PORTAY). 2282 * Fix potential NULL pointer dereference (not trigerrable remotely) when 2283 ssl_write() is called before the handshake is finished (introduced in 2284 1.3.10) (first reported by Martin Blumenstingl). 2285 * Fix bug in pk_parse_key() that caused some valid private EC keys to be 2286 rejected. 2287 * Fix bug in Via Padlock support (found by Nikos Mavrogiannopoulos). 2288 * Fix thread safety bug in RSA operations (found by Fredrik Axelsson). 2289 * Fix hardclock() (only used in the benchmarking program) with some 2290 versions of mingw64 (found by kxjhlele). 2291 * Fix warnings from mingw64 in timing.c (found by kxjklele). 2292 * Fix potential unintended sign extension in asn1_get_len() on 64-bit 2293 platforms. 2294 * Fix potential memory leak in ssl_set_psk() (found by Mansour Moufid). 2295 * Fix compile error when POLARSSL_SSL_DISABLE_RENEGOTATION and 2296 POLARSSL_SSL_SSESSION_TICKETS where both enabled in config.h (introduced 2297 in 1.3.10). 2298 * Add missing extern "C" guard in aesni.h (reported by amir zamani). 2299 * Add missing dependency on SHA-256 in some x509 programs (reported by 2300 Gergely Budai). 2301 * Fix bug related to ssl_set_curves(): the client didn't check that the 2302 curve picked by the server was actually allowed. 2303 2304Changes 2305 * Remove bias in mpi_gen_prime (contributed by Pascal Junod). 2306 * Remove potential sources of timing variations (some contributed by Pascal 2307 Junod). 2308 * Options POLARSSL_HAVE_INT8 and POLARSSL_HAVE_INT16 are deprecated. 2309 * Enabling POLARSSL_NET_C without POLARSSL_HAVE_IPV6 is deprecated. 2310 * compat-1.2.h and openssl.h are deprecated. 2311 * Adjusting/overriding CFLAGS and LDFLAGS with the make build system is now 2312 more flexible (warning: OFLAGS is not used any more) (see the README) 2313 (contributed by Alon Bar-Lev). 2314 * ssl_set_own_cert() no longer calls pk_check_pair() since the 2315 performance impact was bad for some users (this was introduced in 1.3.10). 2316 * Move from SHA-1 to SHA-256 in example programs using signatures 2317 (suggested by Thorsten Mühlfelder). 2318 * Remove some unneeded inclusions of header files from the standard library 2319 "minimize" others (eg use stddef.h if only size_t is needed). 2320 * Change #include lines in test files to use double quotes instead of angle 2321 brackets for uniformity with the rest of the code. 2322 * Remove dependency on sscanf() in X.509 parsing modules. 2323 2324= mbed TLS 1.3.10 released 2015-02-09 2325Security 2326 * NULL pointer dereference in the buffer-based allocator when the buffer is 2327 full and polarssl_free() is called (found by Mark Hasemeyer) 2328 (only possible if POLARSSL_MEMORY_BUFFER_ALLOC_C is enabled, which it is 2329 not by default). 2330 * Fix remotely-triggerable uninitialised pointer dereference caused by 2331 crafted X.509 certificate (TLS server is not affected if it doesn't ask for a 2332 client certificate) (found using Codenomicon Defensics). 2333 * Fix remotely-triggerable memory leak caused by crafted X.509 certificates 2334 (TLS server is not affected if it doesn't ask for a client certificate) 2335 (found using Codenomicon Defensics). 2336 * Fix potential stack overflow while parsing crafted X.509 certificates 2337 (TLS server is not affected if it doesn't ask for a client certificate) 2338 (found using Codenomicon Defensics). 2339 * Fix timing difference that could theoretically lead to a 2340 Bleichenbacher-style attack in the RSA and RSA-PSK key exchanges 2341 (reported by Sebastian Schinzel). 2342 2343Features 2344 * Add support for FALLBACK_SCSV (draft-ietf-tls-downgrade-scsv). 2345 * Add support for Extended Master Secret (draft-ietf-tls-session-hash). 2346 * Add support for Encrypt-then-MAC (RFC 7366). 2347 * Add function pk_check_pair() to test if public and private keys match. 2348 * Add x509_crl_parse_der(). 2349 * Add compile-time option POLARSSL_X509_MAX_INTERMEDIATE_CA to limit the 2350 length of an X.509 verification chain. 2351 * Support for renegotiation can now be disabled at compile-time 2352 * Support for 1/n-1 record splitting, a countermeasure against BEAST. 2353 * Certificate selection based on signature hash, preferring SHA-1 over SHA-2 2354 for pre-1.2 clients when multiple certificates are available. 2355 * Add support for getrandom() syscall on recent Linux kernels with Glibc or 2356 a compatible enough libc (eg uClibc). 2357 * Add ssl_set_arc4_support() to make it easier to disable RC4 at runtime 2358 while using the default ciphersuite list. 2359 * Added new error codes and debug messages about selection of 2360 ciphersuite/certificate. 2361 2362Bugfix 2363 * Stack buffer overflow if ctr_drbg_update() is called with too large 2364 add_len (found by Jean-Philippe Aumasson) (not triggerable remotely). 2365 * Possible buffer overflow of length at most POLARSSL_MEMORY_ALIGN_MULTIPLE 2366 if memory_buffer_alloc_init() was called with buf not aligned and len not 2367 a multiple of POLARSSL_MEMORY_ALIGN_MULTIPLE (not triggerable remotely). 2368 * User set CFLAGS were ignored by Cmake with gcc (introduced in 1.3.9, found 2369 by Julian Ospald). 2370 * Fix potential undefined behaviour in Camellia. 2371 * Fix potential failure in ECDSA signatures when POLARSSL_ECP_MAX_BITS is a 2372 multiple of 8 (found by Gergely Budai). 2373 * Fix unchecked return code in x509_crt_parse_path() on Windows (found by 2374 Peter Vaskovic). 2375 * Fix assembly selection for MIPS64 (thanks to James Cowgill). 2376 * ssl_get_verify_result() now works even if the handshake was aborted due 2377 to a failed verification (found by Fredrik Axelsson). 2378 * Skip writing and parsing signature_algorithm extension if none of the 2379 key exchanges enabled needs certificates. This fixes a possible interop 2380 issue with some servers when a zero-length extension was sent. (Reported 2381 by Peter Dettman.) 2382 * On a 0-length input, base64_encode() did not correctly set output length 2383 (found by Hendrik van den Boogaard). 2384 2385Changes 2386 * Use deterministic nonces for AEAD ciphers in TLS by default (possible to 2387 switch back to random with POLARSSL_SSL_AEAD_RANDOM_IV in config.h). 2388 * Blind RSA private operations even when POLARSSL_RSA_NO_CRT is defined. 2389 * ssl_set_own_cert() now returns an error on key-certificate mismatch. 2390 * Forbid repeated extensions in X.509 certificates. 2391 * debug_print_buf() now prints a text view in addition to hexadecimal. 2392 * A specific error is now returned when there are ciphersuites in common 2393 but none of them is usable due to external factors such as no certificate 2394 with a suitable (extended)KeyUsage or curve or no PSK set. 2395 * It is now possible to disable negotiation of truncated HMAC server-side 2396 at runtime with ssl_set_truncated_hmac(). 2397 * Example programs for SSL client and server now disable SSLv3 by default. 2398 * Example programs for SSL client and server now disable RC4 by default. 2399 * Use platform.h in all test suites and programs. 2400 2401= PolarSSL 1.3.9 released 2014-10-20 2402Security 2403 * Lowest common hash was selected from signature_algorithms extension in 2404 TLS 1.2 (found by Darren Bane) (introduced in 1.3.8). 2405 * Remotely-triggerable memory leak when parsing some X.509 certificates 2406 (server is not affected if it doesn't ask for a client certificate) 2407 (found using Codenomicon Defensics). 2408 * Remotely-triggerable memory leak when parsing crafted ClientHello 2409 (not affected if ECC support was compiled out) (found using Codenomicon 2410 Defensics). 2411 2412Bugfix 2413 * Support escaping of commas in x509_string_to_names() 2414 * Fix compile error in ssl_pthread_server (found by Julian Ospald). 2415 * Fix net_accept() regarding non-blocking sockets (found by Luca Pesce). 2416 * Don't print uninitialised buffer in ssl_mail_client (found by Marc Abel). 2417 * Fix warnings from Clang's scan-build (contributed by Alfred Klomp). 2418 * Fix compile error in timing.c when POLARSSL_NET_C and POLARSSL_SELFTEST 2419 are defined but not POLARSSL_HAVE_TIME (found by Stephane Di Vito). 2420 * Remove non-existent file from VS projects (found by Peter Vaskovic). 2421 * ssl_read() could return non-application data records on server while 2422 renegotation was pending, and on client when a HelloRequest was received. 2423 * Server-initiated renegotiation would fail with non-blocking I/O if the 2424 write callback returned WANT_WRITE when requesting renegotiation. 2425 * ssl_close_notify() could send more than one message in some circumstances 2426 with non-blocking I/O. 2427 * Fix compiler warnings on iOS (found by Sander Niemeijer). 2428 * x509_crt_parse() did not increase total_failed on PEM error 2429 * Fix compile error with armcc in mpi_is_prime() 2430 * Fix potential bad read in parsing ServerHello (found by Adrien 2431 Vialletelle). 2432 2433Changes 2434 * Ciphersuites using SHA-256 or SHA-384 now require TLS 1.x (there is no 2435 standard defining how to use SHA-2 with SSL 3.0). 2436 * Ciphersuites using RSA-PSK key exchange new require TLS 1.x (the spec is 2437 ambiguous on how to encode some packets with SSL 3.0). 2438 * Made buffer size in pk_write_(pub)key_pem() more dynamic, eg smaller if 2439 RSA is disabled, larger if POLARSSL_MPI_MAX_SIZE is larger. 2440 * ssl_read() now returns POLARSSL_ERR_NET_WANT_READ rather than 2441 POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE on harmless alerts. 2442 * POLARSSL_MPI_MAX_SIZE now defaults to 1024 in order to allow 8192 bits 2443 RSA keys. 2444 * Accept spaces at end of line or end of buffer in base64_decode(). 2445 * X.509 certificates with more than one AttributeTypeAndValue per 2446 RelativeDistinguishedName are not accepted any more. 2447 2448= PolarSSL 1.3.8 released 2014-07-11 2449Security 2450 * Fix length checking for AEAD ciphersuites (found by Codenomicon). 2451 It was possible to crash the server (and client) using crafted messages 2452 when a GCM suite was chosen. 2453 2454Features 2455 * Add CCM module and cipher mode to Cipher Layer 2456 * Support for CCM and CCM_8 ciphersuites 2457 * Support for parsing and verifying RSASSA-PSS signatures in the X.509 2458 modules (certificates, CRLs and CSRs). 2459 * Blowfish in the cipher layer now supports variable length keys. 2460 * Add example config.h for PSK with CCM, optimized for low RAM usage. 2461 * Optimize for RAM usage in example config.h for NSA Suite B profile. 2462 * Add POLARSSL_REMOVE_ARC4_CIPHERSUITES to allow removing RC4 ciphersuites 2463 from the default list (inactive by default). 2464 * Add server-side enforcement of sent renegotiation requests 2465 (ssl_set_renegotiation_enforced()) 2466 * Add SSL_CIPHERSUITES config.h flag to allow specifying a list of 2467 ciphersuites to use and save some memory if the list is small. 2468 2469Changes 2470 * Add LINK_WITH_PTHREAD option in CMake for explicit linking that is 2471 required on some platforms (e.g. OpenBSD) 2472 * Migrate zeroizing of data to polarssl_zeroize() instead of memset() 2473 against unwanted compiler optimizations 2474 * md_list() now returns hashes strongest first 2475 * Selection of hash for signing ServerKeyExchange in TLS 1.2 now picks 2476 strongest offered by client. 2477 * All public contexts have _init() and _free() functions now for simpler 2478 usage pattern 2479 2480Bugfix 2481 * Fix in debug_print_msg() 2482 * Enforce alignment in the buffer allocator even if buffer is not aligned 2483 * Remove less-than-zero checks on unsigned numbers 2484 * Stricter check on SSL ClientHello internal sizes compared to actual packet 2485 size (found by TrustInSoft) 2486 * Fix WSAStartup() return value check (found by Peter Vaskovic) 2487 * Other minor issues (found by Peter Vaskovic) 2488 * Fix symlink command for cross compiling with CMake (found by Andre 2489 Heinecke) 2490 * Fix DER output of gen_key app (found by Gergely Budai) 2491 * Very small records were incorrectly rejected when truncated HMAC was in 2492 use with some ciphersuites and versions (RC4 in all versions, CBC with 2493 versions < TLS 1.1). 2494 * Very large records using more than 224 bytes of padding were incorrectly 2495 rejected with CBC-based ciphersuites and TLS >= 1.1 2496 * Very large records using less padding could cause a buffer overread of up 2497 to 32 bytes with CBC-based ciphersuites and TLS >= 1.1 2498 * Restore ability to use a v1 cert as a CA if trusted locally. (This had 2499 been removed in 1.3.6.) 2500 * Restore ability to locally trust a self-signed cert that is not a proper 2501 CA for use as an end entity certificate. (This had been removed in 2502 1.3.6.) 2503 * Fix preprocessor checks for bn_mul PPC asm (found by Barry K. Nathan). 2504 * Use \n\t rather than semicolons for bn_mul asm, since some assemblers 2505 interpret semicolons as comment delimiters (found by Barry K. Nathan). 2506 * Fix off-by-one error in parsing Supported Point Format extension that 2507 caused some handshakes to fail. 2508 * Fix possible miscomputation of the premaster secret with DHE-PSK key 2509 exchange that caused some handshakes to fail with other implementations. 2510 (Failure rate <= 1/255 with common DHM moduli.) 2511 * Disable broken Sparc64 bn_mul assembly (found by Florian Obser). 2512 * Fix base64_decode() to return and check length correctly (in case of 2513 tight buffers) 2514 * Fix mpi_write_string() to write "00" as hex output for empty MPI (found 2515 by Hui Dong) 2516 2517= PolarSSL 1.3.7 released on 2014-05-02 2518Features 2519 * debug_set_log_mode() added to determine raw or full logging 2520 * debug_set_threshold() added to ignore messages over threshold level 2521 * version_check_feature() added to check for compile-time options at 2522 run-time 2523 2524Changes 2525 * POLARSSL_CONFIG_OPTIONS has been removed. All values are individually 2526 checked and filled in the relevant module headers 2527 * Debug module only outputs full lines instead of parts 2528 * Better support for the different Attribute Types from IETF PKIX (RFC 5280) 2529 * AES-NI now compiles with "old" assemblers too 2530 * Ciphersuites based on RC4 now have the lowest priority by default 2531 2532Bugfix 2533 * Only iterate over actual certificates in ssl_write_certificate_request() 2534 (found by Matthew Page) 2535 * Typos in platform.c and pkcs11.c (found by Daniel Phillips and Steffan 2536 Karger) 2537 * cert_write app should use subject of issuer certificate as issuer of cert 2538 * Fix false reject in padding check in ssl_decrypt_buf() for CBC 2539 ciphersuites, for full SSL frames of data. 2540 * Improve interoperability by not writing extension length in ClientHello / 2541 ServerHello when no extensions are present (found by Matthew Page) 2542 * rsa_check_pubkey() now allows an E up to N 2543 * On OpenBSD, use arc4random_buf() instead of rand() to prevent warnings 2544 * mpi_fill_random() was creating numbers larger than requested on 2545 big-endian platform when size was not an integer number of limbs 2546 * Fix dependencies issues in X.509 test suite. 2547 * Some parts of ssl_tls.c were compiled even when the module was disabled. 2548 * Fix detection of DragonflyBSD in net.c (found by Markus Pfeiffer) 2549 * Fix detection of Clang on some Apple platforms with CMake 2550 (found by Barry K. Nathan) 2551 2552= PolarSSL 1.3.6 released on 2014-04-11 2553 2554Features 2555 * Support for the ALPN SSL extension 2556 * Add option 'use_dev_random' to gen_key application 2557 * Enable verification of the keyUsage extension for CA and leaf 2558 certificates (POLARSSL_X509_CHECK_KEY_USAGE) 2559 * Enable verification of the extendedKeyUsage extension 2560 (POLARSSL_X509_CHECK_EXTENDED_KEY_USAGE) 2561 2562Changes 2563 * x509_crt_info() now prints information about parsed extensions as well 2564 * pk_verify() now returns a specific error code when the signature is valid 2565 but shorter than the supplied length. 2566 * Use UTC time to check certificate validity. 2567 * Reject certificates with times not in UTC, per RFC 5280. 2568 2569Security 2570 * Avoid potential timing leak in ecdsa_sign() by blinding modular division. 2571 (Found by Watson Ladd.) 2572 * The notAfter date of some certificates was no longer checked since 1.3.5. 2573 This affects certificates in the user-supplied chain except the top 2574 certificate. If the user-supplied chain contains only one certificates, 2575 it is not affected (ie, its notAfter date is properly checked). 2576 * Prevent potential NULL pointer dereference in ssl_read_record() (found by 2577 TrustInSoft) 2578 2579Bugfix 2580 * The length of various ClientKeyExchange messages was not properly checked. 2581 * Some example server programs were not sending the close_notify alert. 2582 * Potential memory leak in mpi_exp_mod() when error occurs during 2583 calculation of RR. 2584 * Fixed malloc/free default #define in platform.c (found by Gergely Budai). 2585 * Fixed type which made POLARSSL_ENTROPY_FORCE_SHA256 uneffective (found by 2586 Gergely Budai). 2587 * Fix #include path in ecdsa.h which wasn't accepted by some compilers. 2588 (found by Gergely Budai) 2589 * Fix compile errors when POLARSSL_ERROR_STRERROR_BC is undefined (found by 2590 Shuo Chen). 2591 * oid_get_numeric_string() used to truncate the output without returning an 2592 error if the output buffer was just 1 byte too small. 2593 * dhm_parse_dhm() (hence dhm_parse_dhmfile()) did not set dhm->len. 2594 * Calling pk_debug() on an RSA-alt key would segfault. 2595 * pk_get_size() and pk_get_len() were off by a factor 8 for RSA-alt keys. 2596 * Potential buffer overwrite in pem_write_buffer() because of low length 2597 indication (found by Thijs Alkemade) 2598 * EC curves constants, which should be only in ROM since 1.3.3, were also 2599 stored in RAM due to missing 'const's (found by Gergely Budai). 2600 2601= PolarSSL 1.3.5 released on 2014-03-26 2602Features 2603 * HMAC-DRBG as a separate module 2604 * Option to set the Curve preference order (disabled by default) 2605 * Single Platform compatilibity layer (for memory / printf / fprintf) 2606 * Ability to provide alternate timing implementation 2607 * Ability to force the entropy module to use SHA-256 as its basis 2608 (POLARSSL_ENTROPY_FORCE_SHA256) 2609 * Testing script ssl-opt.sh added for testing 'live' ssl option 2610 interoperability against OpenSSL and PolarSSL 2611 * Support for reading EC keys that use SpecifiedECDomain in some cases. 2612 * Entropy module now supports seed writing and reading 2613 2614Changes 2615 * Deprecated the Memory layer 2616 * entropy_add_source(), entropy_update_manual() and entropy_gather() 2617 now thread-safe if POLARSSL_THREADING_C defined 2618 * Improvements to the CMake build system, contributed by Julian Ospald. 2619 * Work around a bug of the version of Clang shipped by Apple with Mavericks 2620 that prevented bignum.c from compiling. (Reported by Rafael Baptista.) 2621 * Revamped the compat.sh interoperatibility script to include support for 2622 testing against GnuTLS 2623 * Deprecated ssl_set_own_cert_rsa() and ssl_set_own_cert_rsa_alt() 2624 * Improvements to tests/Makefile, contributed by Oden Eriksson. 2625 2626Security 2627 * Forbid change of server certificate during renegotiation to prevent 2628 "triple handshake" attack when authentication mode is 'optional' (the 2629 attack was already impossible when authentication is required). 2630 * Check notBefore timestamp of certificates and CRLs from the future. 2631 * Forbid sequence number wrapping 2632 * Fixed possible buffer overflow with overlong PSK 2633 * Possible remotely-triggered out-of-bounds memory access fixed (found by 2634 TrustInSoft) 2635 2636Bugfix 2637 * ecp_gen_keypair() does more tries to prevent failure because of 2638 statistics 2639 * Fixed bug in RSA PKCS#1 v1.5 "reversed" operations 2640 * Fixed testing with out-of-source builds using cmake 2641 * Fixed version-major intolerance in server 2642 * Fixed CMake symlinking on out-of-source builds 2643 * Fixed dependency issues in test suite 2644 * Programs rsa_sign_pss and rsa_verify_pss were not using PSS since 1.3.0 2645 * Bignum's MIPS-32 assembly was used on MIPS-64, causing chaos. (Found by 2646 Alex Wilson.) 2647 * ssl_cache was creating entries when max_entries=0 if TIMING_C was enabled. 2648 * m_sleep() was sleeping twice too long on most Unix platforms. 2649 * Fixed bug with session tickets and non-blocking I/O in the unlikely case 2650 send() would return an EAGAIN error when sending the ticket. 2651 * ssl_cache was leaking memory when reusing a timed out entry containing a 2652 client certificate. 2653 * ssl_srv was leaking memory when client presented a timed out ticket 2654 containing a client certificate 2655 * ssl_init() was leaving a dirty pointer in ssl_context if malloc of 2656 out_ctr failed 2657 * ssl_handshake_init() was leaving dirty pointers in subcontexts if malloc 2658 of one of them failed 2659 * Fix typo in rsa_copy() that impacted PKCS#1 v2 contexts 2660 * x509_get_current_time() uses localtime_r() to prevent thread issues 2661 2662= PolarSSL 1.3.4 released on 2014-01-27 2663Features 2664 * Support for the Koblitz curves: secp192k1, secp224k1, secp256k1 2665 * Support for RIPEMD-160 2666 * Support for AES CFB8 mode 2667 * Support for deterministic ECDSA (RFC 6979) 2668 2669Bugfix 2670 * Potential memory leak in bignum_selftest() 2671 * Replaced expired test certificate 2672 * ssl_mail_client now terminates lines with CRLF, instead of LF 2673 * net module handles timeouts on blocking sockets better (found by Tilman 2674 Sauerbeck) 2675 * Assembly format fixes in bn_mul.h 2676 2677Security 2678 * Missing MPI_CHK calls added around unguarded mpi calls (found by 2679 TrustInSoft) 2680 2681= PolarSSL 1.3.3 released on 2013-12-31 2682Features 2683 * EC key generation support in gen_key app 2684 * Support for adhering to client ciphersuite order preference 2685 (POLARSSL_SSL_SRV_RESPECT_CLIENT_PREFERENCE) 2686 * Support for Curve25519 2687 * Support for ECDH-RSA and ECDH-ECDSA key exchanges and ciphersuites 2688 * Support for IPv6 in the NET module 2689 * AES-NI support for AES, AES-GCM and AES key scheduling 2690 * SSL Pthread-based server example added (ssl_pthread_server) 2691 2692Changes 2693 * gen_prime() speedup 2694 * Speedup of ECP multiplication operation 2695 * Relaxed some SHA2 ciphersuite's version requirements 2696 * Dropped use of readdir_r() instead of readdir() with threading support 2697 * More constant-time checks in the RSA module 2698 * Split off curves from ecp.c into ecp_curves.c 2699 * Curves are now stored fully in ROM 2700 * Memory usage optimizations in ECP module 2701 * Removed POLARSSL_THREADING_DUMMY 2702 2703Bugfix 2704 * Fixed bug in mpi_set_bit() on platforms where t_uint is wider than int 2705 * Fixed X.509 hostname comparison (with non-regular characters) 2706 * SSL now gracefully handles missing RNG 2707 * Missing defines / cases for RSA_PSK key exchange 2708 * crypt_and_hash app checks MAC before final decryption 2709 * Potential memory leak in ssl_ticket_keys_init() 2710 * Memory leak in benchmark application 2711 * Fixed x509_crt_parse_path() bug on Windows platforms 2712 * Added missing MPI_CHK() around some statements in mpi_div_mpi() (found by 2713 TrustInSoft) 2714 * Fixed potential overflow in certificate size verification in 2715 ssl_write_certificate() (found by TrustInSoft) 2716 2717Security 2718 * Possible remotely-triggered out-of-bounds memory access fixed (found by 2719 TrustInSoft) 2720 2721= PolarSSL 1.3.2 released on 2013-11-04 2722Features 2723 * PK tests added to test framework 2724 * Added optional optimization for NIST MODP curves (POLARSSL_ECP_NIST_OPTIM) 2725 * Support for Camellia-GCM mode and ciphersuites 2726 2727Changes 2728 * Padding checks in cipher layer are now constant-time 2729 * Value comparisons in SSL layer are now constant-time 2730 * Support for serialNumber, postalAddress and postalCode in X509 names 2731 * SSL Renegotiation was refactored 2732 2733Bugfix 2734 * More stringent checks in cipher layer 2735 * Server does not send out extensions not advertised by client 2736 * Prevent possible alignment warnings on casting from char * to 'aligned *' 2737 * Misc fixes and additions to dependency checks 2738 * Const correctness 2739 * cert_write with selfsign should use issuer_name as subject_name 2740 * Fix ECDSA corner case: missing reduction mod N (found by DualTachyon) 2741 * Defines to handle UEFI environment under MSVC 2742 * Server-side initiated renegotiations send HelloRequest 2743 2744= PolarSSL 1.3.1 released on 2013-10-15 2745Features 2746 * Support for Brainpool curves and TLS ciphersuites (RFC 7027) 2747 * Support for ECDHE-PSK key-exchange and ciphersuites 2748 * Support for RSA-PSK key-exchange and ciphersuites 2749 2750Changes 2751 * RSA blinding locks for a smaller amount of time 2752 * TLS compression only allocates working buffer once 2753 * Introduced POLARSSL_HAVE_READDIR_R for systems without it 2754 * config.h is more script-friendly 2755 2756Bugfix 2757 * Missing MSVC defines added 2758 * Compile errors with POLARSSL_RSA_NO_CRT 2759 * Header files with 'polarssl/' 2760 * Const correctness 2761 * Possible naming collision in dhm_context 2762 * Better support for MSVC 2763 * threading_set_alt() name 2764 * Added missing x509write_crt_set_version() 2765 2766= PolarSSL 1.3.0 released on 2013-10-01 2767Features 2768 * Elliptic Curve Cryptography module added 2769 * Elliptic Curve Diffie Hellman module added 2770 * Ephemeral Elliptic Curve Diffie Hellman support for SSL/TLS 2771 (ECDHE-based ciphersuites) 2772 * Ephemeral Elliptic Curve Digital Signature Algorithm support for SSL/TLS 2773 (ECDSA-based ciphersuites) 2774 * Ability to specify allowed ciphersuites based on the protocol version. 2775 * PSK and DHE-PSK based ciphersuites added 2776 * Memory allocation abstraction layer added 2777 * Buffer-based memory allocator added (no malloc() / free() / HEAP usage) 2778 * Threading abstraction layer added (dummy / pthread / alternate) 2779 * Public Key abstraction layer added 2780 * Parsing Elliptic Curve keys 2781 * Parsing Elliptic Curve certificates 2782 * Support for max_fragment_length extension (RFC 6066) 2783 * Support for truncated_hmac extension (RFC 6066) 2784 * Support for zeros-and-length (ANSI X.923) padding, one-and-zeros 2785 (ISO/IEC 7816-4) padding and zero padding in the cipher layer 2786 * Support for session tickets (RFC 5077) 2787 * Certificate Request (CSR) generation with extensions (key_usage, 2788 ns_cert_type) 2789 * X509 Certificate writing with extensions (basic_constraints, 2790 issuer_key_identifier, etc) 2791 * Optional blinding for RSA, DHM and EC 2792 * Support for multiple active certificate / key pairs in SSL servers for 2793 the same host (Not to be confused with SNI!) 2794 2795Changes 2796 * Ability to enable / disable SSL v3 / TLS 1.0 / TLS 1.1 / TLS 1.2 2797 individually 2798 * Introduced separate SSL Ciphersuites module that is based on 2799 Cipher and MD information 2800 * Internals for SSL module adapted to have separate IV pointer that is 2801 dynamically set (Better support for hardware acceleration) 2802 * Moved all OID functionality to a separate module. RSA function 2803 prototypes for the RSA sign and verify functions changed as a result 2804 * Split up the GCM module into a starts/update/finish cycle 2805 * Client and server now filter sent and accepted ciphersuites on minimum 2806 and maximum protocol version 2807 * Ability to disable server_name extension (RFC 6066) 2808 * Renamed error_strerror() to the less conflicting polarssl_strerror() 2809 (Ability to keep old as well with POLARSSL_ERROR_STRERROR_BC) 2810 * SHA2 renamed to SHA256, SHA4 renamed to SHA512 and functions accordingly 2811 * All RSA operations require a random generator for blinding purposes 2812 * X509 core refactored 2813 * x509_crt_verify() now case insensitive for cn (RFC 6125 6.4) 2814 * Also compiles / runs without time-based functions (!POLARSSL_HAVE_TIME) 2815 * Support faulty X509 v1 certificates with extensions 2816 (POLARSSL_X509_ALLOW_EXTENSIONS_NON_V3) 2817 2818Bugfix 2819 * Fixed parse error in ssl_parse_certificate_request() 2820 * zlib compression/decompression skipped on empty blocks 2821 * Support for AIX header locations in net.c module 2822 * Fixed file descriptor leaks 2823 2824Security 2825 * RSA blinding on CRT operations to counter timing attacks 2826 (found by Cyril Arnaud and Pierre-Alain Fouque) 2827 2828 2829= Version 1.2.14 released 2015-05-?? 2830 2831Security 2832 * Fix potential invalid memory read in the server, that allows a client to 2833 crash it remotely (found by Caj Larsson). 2834 * Fix potential invalid memory read in certificate parsing, that allows a 2835 client to crash the server remotely if client authentication is enabled 2836 (found using Codenomicon Defensics). 2837 * Add countermeasure against "Lucky 13 strikes back" cache-based attack, 2838 https://dl.acm.org/citation.cfm?id=2714625 2839 2840Bugfix 2841 * Fix bug in Via Padlock support (found by Nikos Mavrogiannopoulos). 2842 * Fix hardclock() (only used in the benchmarking program) with some 2843 versions of mingw64 (found by kxjhlele). 2844 * Fix warnings from mingw64 in timing.c (found by kxjklele). 2845 * Fix potential unintended sign extension in asn1_get_len() on 64-bit 2846 platforms (found with Coverity Scan). 2847 2848= Version 1.2.13 released 2015-02-16 2849Note: Although PolarSSL has been renamed to mbed TLS, no changes reflecting 2850 this will be made in the 1.2 branch at this point. 2851 2852Security 2853 * Fix remotely-triggerable uninitialised pointer dereference caused by 2854 crafted X.509 certificate (TLS server is not affected if it doesn't ask 2855 for a client certificate) (found using Codenomicon Defensics). 2856 * Fix remotely-triggerable memory leak caused by crafted X.509 certificates 2857 (TLS server is not affected if it doesn't ask for a client certificate) 2858 (found using Codenomicon Defensics). 2859 * Fix potential stack overflow while parsing crafted X.509 certificates 2860 (TLS server is not affected if it doesn't ask for a client certificate) 2861 found using Codenomicon Defensics). 2862 * Fix buffer overread of size 1 when parsing crafted X.509 certificates 2863 (TLS server is not affected if it doesn't ask for a client certificate). 2864 2865Bugfix 2866 * Fix potential undefined behaviour in Camellia. 2867 * Fix memory leaks in PKCS#5 and PKCS#12. 2868 * Stack buffer overflow if ctr_drbg_update() is called with too large 2869 add_len (found by Jean-Philippe Aumasson) (not triggerable remotely). 2870 * Fix bug in MPI/bignum on s390/s390x (reported by Dan Horák) (introduced 2871 in 1.2.12). 2872 * Fix unchecked return code in x509_crt_parse_path() on Windows (found by 2873 Peter Vaskovic). 2874 * Fix assembly selection for MIPS64 (thanks to James Cowgill). 2875 * ssl_get_verify_result() now works even if the handshake was aborted due 2876 to a failed verification (found by Fredrik Axelsson). 2877 * Skip writing and parsing signature_algorithm extension if none of the 2878 key exchanges enabled needs certificates. This fixes a possible interop 2879 issue with some servers when a zero-length extension was sent. (Reported 2880 by Peter Dettman.) 2881 * On a 0-length input, base64_encode() did not correctly set output length 2882 (found by Hendrik van den Boogaard). 2883 2884Changes 2885 * Blind RSA private operations even when POLARSSL_RSA_NO_CRT is defined. 2886 * Forbid repeated extensions in X.509 certificates. 2887 * Add compile-time option POLARSSL_X509_MAX_INTERMEDIATE_CA to limit the 2888 length of an X.509 verification chain (default = 8). 2889= Version 1.2.12 released 2014-10-24 2890 2891Security 2892 * Remotely-triggerable memory leak when parsing some X.509 certificates 2893 (server is not affected if it doesn't ask for a client certificate). 2894 (Found using Codenomicon Defensics.) 2895 2896Bugfix 2897 * Fix potential bad read in parsing ServerHello (found by Adrien 2898 Vialletelle). 2899 * ssl_close_notify() could send more than one message in some circumstances 2900 with non-blocking I/O. 2901 * x509_crt_parse() did not increase total_failed on PEM error 2902 * Fix compiler warnings on iOS (found by Sander Niemeijer). 2903 * Don't print uninitialised buffer in ssl_mail_client (found by Marc Abel). 2904 * Fix net_accept() regarding non-blocking sockets (found by Luca Pesce). 2905 * ssl_read() could return non-application data records on server while 2906 renegotation was pending, and on client when a HelloRequest was received. 2907 * Fix warnings from Clang's scan-build (contributed by Alfred Klomp). 2908 2909Changes 2910 * X.509 certificates with more than one AttributeTypeAndValue per 2911 RelativeDistinguishedName are not accepted any more. 2912 * ssl_read() now returns POLARSSL_ERR_NET_WANT_READ rather than 2913 POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE on harmless alerts. 2914 * Accept spaces at end of line or end of buffer in base64_decode(). 2915 2916= Version 1.2.11 released 2014-07-11 2917Features 2918 * Entropy module now supports seed writing and reading 2919 2920Changes 2921 * Introduced POLARSSL_HAVE_READDIR_R for systems without it 2922 * Improvements to the CMake build system, contributed by Julian Ospald. 2923 * Work around a bug of the version of Clang shipped by Apple with Mavericks 2924 that prevented bignum.c from compiling. (Reported by Rafael Baptista.) 2925 * Improvements to tests/Makefile, contributed by Oden Eriksson. 2926 * Use UTC time to check certificate validity. 2927 * Reject certificates with times not in UTC, per RFC 5280. 2928 * Migrate zeroizing of data to polarssl_zeroize() instead of memset() 2929 against unwanted compiler optimizations 2930 2931Security 2932 * Forbid change of server certificate during renegotiation to prevent 2933 "triple handshake" attack when authentication mode is optional (the 2934 attack was already impossible when authentication is required). 2935 * Check notBefore timestamp of certificates and CRLs from the future. 2936 * Forbid sequence number wrapping 2937 * Prevent potential NULL pointer dereference in ssl_read_record() (found by 2938 TrustInSoft) 2939 * Fix length checking for AEAD ciphersuites (found by Codenomicon). 2940 It was possible to crash the server (and client) using crafted messages 2941 when a GCM suite was chosen. 2942 2943Bugfix 2944 * Fixed X.509 hostname comparison (with non-regular characters) 2945 * SSL now gracefully handles missing RNG 2946 * crypt_and_hash app checks MAC before final decryption 2947 * Fixed x509_crt_parse_path() bug on Windows platforms 2948 * Added missing MPI_CHK() around some statements in mpi_div_mpi() (found by 2949 TrustInSoft) 2950 * Fixed potential overflow in certificate size verification in 2951 ssl_write_certificate() (found by TrustInSoft) 2952 * Fix ASM format in bn_mul.h 2953 * Potential memory leak in bignum_selftest() 2954 * Replaced expired test certificate 2955 * ssl_mail_client now terminates lines with CRLF, instead of LF 2956 * Fix bug in RSA PKCS#1 v1.5 "reversed" operations 2957 * Fixed testing with out-of-source builds using cmake 2958 * Fixed version-major intolerance in server 2959 * Fixed CMake symlinking on out-of-source builds 2960 * Bignum's MIPS-32 assembly was used on MIPS-64, causing chaos. (Found by 2961 Alex Wilson.) 2962 * ssl_init() was leaving a dirty pointer in ssl_context if malloc of 2963 out_ctr failed 2964 * ssl_handshake_init() was leaving dirty pointers in subcontexts if malloc 2965 of one of them failed 2966 * x509_get_current_time() uses localtime_r() to prevent thread issues 2967 * Some example server programs were not sending the close_notify alert. 2968 * Potential memory leak in mpi_exp_mod() when error occurs during 2969 calculation of RR. 2970 * Improve interoperability by not writing extension length in ClientHello 2971 when no extensions are present (found by Matthew Page) 2972 * rsa_check_pubkey() now allows an E up to N 2973 * On OpenBSD, use arc4random_buf() instead of rand() to prevent warnings 2974 * mpi_fill_random() was creating numbers larger than requested on 2975 big-endian platform when size was not an integer number of limbs 2976 * Fix detection of DragonflyBSD in net.c (found by Markus Pfeiffer) 2977 * Stricter check on SSL ClientHello internal sizes compared to actual packet 2978 size (found by TrustInSoft) 2979 * Fix preprocessor checks for bn_mul PPC asm (found by Barry K. Nathan). 2980 * Use \n\t rather than semicolons for bn_mul asm, since some assemblers 2981 interpret semicolons as comment delimiters (found by Barry K. Nathan). 2982 * Disable broken Sparc64 bn_mul assembly (found by Florian Obser). 2983 * Fix base64_decode() to return and check length correctly (in case of 2984 tight buffers) 2985 2986= Version 1.2.10 released 2013-10-07 2987Changes 2988 * Changed RSA blinding to a slower but thread-safe version 2989 2990Bugfix 2991 * Fixed memory leak in RSA as a result of introduction of blinding 2992 * Fixed ssl_pkcs11_decrypt() prototype 2993 * Fixed MSVC project files 2994 2995= Version 1.2.9 released 2013-10-01 2996Changes 2997 * x509_verify() now case insensitive for cn (RFC 6125 6.4) 2998 2999Bugfix 3000 * Fixed potential memory leak when failing to resume a session 3001 * Fixed potential file descriptor leaks (found by Remi Gacogne) 3002 * Minor fixes 3003 3004Security 3005 * Fixed potential heap buffer overflow on large hostname setting 3006 * Fixed potential negative value misinterpretation in load_file() 3007 * RSA blinding on CRT operations to counter timing attacks 3008 (found by Cyril Arnaud and Pierre-Alain Fouque) 3009 3010= Version 1.2.8 released 2013-06-19 3011Features 3012 * Parsing of PKCS#8 encrypted private key files 3013 * PKCS#12 PBE and derivation functions 3014 * Centralized module option values in config.h to allow user-defined 3015 settings without editing header files by using POLARSSL_CONFIG_OPTIONS 3016 3017Changes 3018 * HAVEGE random generator disabled by default 3019 * Internally split up x509parse_key() into a (PEM) handler function 3020 and specific DER parser functions for the PKCS#1 and unencrypted 3021 PKCS#8 private key formats 3022 * Added mechanism to provide alternative implementations for all 3023 symmetric cipher and hash algorithms (e.g. POLARSSL_AES_ALT in 3024 config.h) 3025 * PKCS#5 module added. Moved PBKDF2 functionality inside and deprecated 3026 old PBKDF2 module 3027 3028Bugfix 3029 * Secure renegotiation extension should only be sent in case client 3030 supports secure renegotiation 3031 * Fixed offset for cert_type list in ssl_parse_certificate_request() 3032 * Fixed const correctness issues that have no impact on the ABI 3033 * x509parse_crt() now better handles PEM error situations 3034 * ssl_parse_certificate() now calls x509parse_crt_der() directly 3035 instead of the x509parse_crt() wrapper that can also parse PEM 3036 certificates 3037 * x509parse_crtpath() is now reentrant and uses more portable stat() 3038 * Fixed bignum.c and bn_mul.h to support Thumb2 and LLVM compiler 3039 * Fixed values for 2-key Triple DES in cipher layer 3040 * ssl_write_certificate_request() can handle empty ca_chain 3041 3042Security 3043 * A possible DoS during the SSL Handshake, due to faulty parsing of 3044 PEM-encoded certificates has been fixed (found by Jack Lloyd) 3045 3046= Version 1.2.7 released 2013-04-13 3047Features 3048 * Ability to specify allowed ciphersuites based on the protocol version. 3049 3050Changes 3051 * Default Blowfish keysize is now 128-bits 3052 * Test suites made smaller to accommodate Raspberry Pi 3053 3054Bugfix 3055 * Fix for MPI assembly for ARM 3056 * GCM adapted to support sizes > 2^29 3057 3058= Version 1.2.6 released 2013-03-11 3059Bugfix 3060 * Fixed memory leak in ssl_free() and ssl_reset() for active session 3061 * Corrected GCM counter incrementation to use only 32-bits instead of 3062 128-bits (found by Yawning Angel) 3063 * Fixes for 64-bit compilation with MS Visual Studio 3064 * Fixed net_bind() for specified IP addresses on little endian systems 3065 * Fixed assembly code for ARM (Thumb and regular) for some compilers 3066 3067Changes 3068 * Internally split up rsa_pkcs1_encrypt(), rsa_pkcs1_decrypt(), 3069 rsa_pkcs1_sign() and rsa_pkcs1_verify() to separate PKCS#1 v1.5 and 3070 PKCS#1 v2.1 functions 3071 * Added support for custom labels when using rsa_rsaes_oaep_encrypt() 3072 or rsa_rsaes_oaep_decrypt() 3073 * Re-added handling for SSLv2 Client Hello when the define 3074 POLARSSL_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO is set 3075 * The SSL session cache module (ssl_cache) now also retains peer_cert 3076 information (not the entire chain) 3077 3078Security 3079 * Removed further timing differences during SSL message decryption in 3080 ssl_decrypt_buf() 3081 * Removed timing differences due to bad padding from 3082 rsa_rsaes_pkcs1_v15_decrypt() and rsa_pkcs1_decrypt() for PKCS#1 v1.5 3083 operations 3084 3085= Version 1.2.5 released 2013-02-02 3086Changes 3087 * Allow enabling of dummy error_strerror() to support some use-cases 3088 * Debug messages about padding errors during SSL message decryption are 3089 disabled by default and can be enabled with POLARSSL_SSL_DEBUG_ALL 3090 * Sending of security-relevant alert messages that do not break 3091 interoperability can be switched on/off with the flag 3092 POLARSSL_SSL_ALL_ALERT_MESSAGES 3093 3094Security 3095 * Removed timing differences during SSL message decryption in 3096 ssl_decrypt_buf() due to badly formatted padding 3097 3098= Version 1.2.4 released 2013-01-25 3099Changes 3100 * More advanced SSL ciphersuite representation and moved to more dynamic 3101 SSL core 3102 * Added ssl_handshake_step() to allow single stepping the handshake process 3103 3104Bugfix 3105 * Memory leak when using RSA_PKCS_V21 operations fixed 3106 * Handle future version properly in ssl_write_certificate_request() 3107 * Correctly handle CertificateRequest message in client for <= TLS 1.1 3108 without DN list 3109 3110= Version 1.2.3 released 2012-11-26 3111Bugfix 3112 * Server not always sending correct CertificateRequest message 3113 3114= Version 1.2.2 released 2012-11-24 3115Changes 3116 * Added p_hw_data to ssl_context for context specific hardware acceleration 3117 data 3118 * During verify trust-CA is only checked for expiration and CRL presence 3119 3120Bugfixes 3121 * Fixed client authentication compatibility 3122 * Fixed dependency on POLARSSL_SHA4_C in SSL modules 3123 3124= Version 1.2.1 released 2012-11-20 3125Changes 3126 * Depth that the certificate verify callback receives is now numbered 3127 bottom-up (Peer cert depth is 0) 3128 3129Bugfixes 3130 * Fixes for MSVC6 3131 * Moved mpi_inv_mod() outside POLARSSL_GENPRIME 3132 * Allow R and A to point to same mpi in mpi_div_mpi (found by Manuel 3133 Pégourié-Gonnard) 3134 * Fixed possible segfault in mpi_shift_r() (found by Manuel 3135 Pégourié-Gonnard) 3136 * Added max length check for rsa_pkcs1_sign with PKCS#1 v2.1 3137 3138= Version 1.2.0 released 2012-10-31 3139Features 3140 * Added support for NULL cipher (POLARSSL_CIPHER_NULL_CIPHER) and weak 3141 ciphersuites (POLARSSL_ENABLE_WEAK_CIPHERSUITES). They are disabled by 3142 default! 3143 * Added support for wildcard certificates 3144 * Added support for multi-domain certificates through the X509 Subject 3145 Alternative Name extension 3146 * Added preliminary ASN.1 buffer writing support 3147 * Added preliminary X509 Certificate Request writing support 3148 * Added key_app_writer example application 3149 * Added cert_req example application 3150 * Added base Galois Counter Mode (GCM) for AES 3151 * Added TLS 1.2 support (RFC 5246) 3152 * Added GCM suites to TLS 1.2 (RFC 5288) 3153 * Added commandline error code convertor (util/strerror) 3154 * Added support for Hardware Acceleration hooking in SSL/TLS 3155 * Added OpenSSL / PolarSSL compatibility script (tests/compat.sh) and 3156 example application (programs/ssl/o_p_test) (requires OpenSSL) 3157 * Added X509 CA Path support 3158 * Added Thumb assembly optimizations 3159 * Added DEFLATE compression support as per RFC3749 (requires zlib) 3160 * Added blowfish algorithm (Generic and cipher layer) 3161 * Added PKCS#5 PBKDF2 key derivation function 3162 * Added Secure Renegotiation (RFC 5746) 3163 * Added predefined DHM groups from RFC 5114 3164 * Added simple SSL session cache implementation 3165 * Added ServerName extension parsing (SNI) at server side 3166 * Added option to add minimum accepted SSL/TLS protocol version 3167 3168Changes 3169 * Removed redundant POLARSSL_DEBUG_MSG define 3170 * AES code only check for Padlock once 3171 * Fixed const-correctness mpi_get_bit() 3172 * Documentation for mpi_lsb() and mpi_msb() 3173 * Moved out_msg to out_hdr + 32 to support hardware acceleration 3174 * Changed certificate verify behaviour to comply with RFC 6125 section 6.3 3175 to not match CN if subjectAltName extension is present (Closes ticket #56) 3176 * Cipher layer cipher_mode_t POLARSSL_MODE_CFB128 is renamed to 3177 POLARSSL_MODE_CFB, to also handle different block size CFB modes. 3178 * Removed handling for SSLv2 Client Hello (as per RFC 5246 recommendation) 3179 * Revamped session resumption handling 3180 * Generalized external private key implementation handling (like PKCS#11) 3181 in SSL/TLS 3182 * Revamped x509_verify() and the SSL f_vrfy callback implementations 3183 * Moved from unsigned long to fixed width uint32_t types throughout code 3184 * Renamed ciphersuites naming scheme to IANA reserved names 3185 3186Bugfix 3187 * Fixed handling error in mpi_cmp_mpi() on longer B values (found by 3188 Hui Dong) 3189 * Fixed potential heap corruption in x509_name allocation 3190 * Fixed single RSA test that failed on Big Endian systems (Closes ticket #54) 3191 * mpi_exp_mod() now correctly handles negative base numbers (Closes ticket 3192 #52) 3193 * Handle encryption with private key and decryption with public key as per 3194 RFC 2313 3195 * Handle empty certificate subject names 3196 * Prevent reading over buffer boundaries on X509 certificate parsing 3197 * mpi_add_abs() now correctly handles adding short numbers to long numbers 3198 with carry rollover (found by Ruslan Yushchenko) 3199 * Handle existence of OpenSSL Trust Extensions at end of X.509 DER blob 3200 * Fixed MPI assembly for SPARC64 platform 3201 3202Security 3203 * Fixed potential memory zeroization on miscrafted RSA key (found by Eloi 3204 Vanderbeken) 3205 3206= Version 1.1.8 released on 2013-10-01 3207Bugfix 3208 * Fixed potential memory leak when failing to resume a session 3209 * Fixed potential file descriptor leaks 3210 3211Security 3212 * Potential buffer-overflow for ssl_read_record() (independently found by 3213 both TrustInSoft and Paul Brodeur of Leviathan Security Group) 3214 * Potential negative value misinterpretation in load_file() 3215 * Potential heap buffer overflow on large hostname setting 3216 3217= Version 1.1.7 released on 2013-06-19 3218Changes 3219 * HAVEGE random generator disabled by default 3220 3221Bugfix 3222 * x509parse_crt() now better handles PEM error situations 3223 * ssl_parse_certificate() now calls x509parse_crt_der() directly 3224 instead of the x509parse_crt() wrapper that can also parse PEM 3225 certificates 3226 * Fixed values for 2-key Triple DES in cipher layer 3227 * ssl_write_certificate_request() can handle empty ca_chain 3228 3229Security 3230 * A possible DoS during the SSL Handshake, due to faulty parsing of 3231 PEM-encoded certificates has been fixed (found by Jack Lloyd) 3232 3233= Version 1.1.6 released on 2013-03-11 3234Bugfix 3235 * Fixed net_bind() for specified IP addresses on little endian systems 3236 3237Changes 3238 * Allow enabling of dummy error_strerror() to support some use-cases 3239 * Debug messages about padding errors during SSL message decryption are 3240 disabled by default and can be enabled with POLARSSL_SSL_DEBUG_ALL 3241 3242Security 3243 * Removed timing differences during SSL message decryption in 3244 ssl_decrypt_buf() 3245 * Removed timing differences due to bad padding from 3246 rsa_rsaes_pkcs1_v15_decrypt() and rsa_pkcs1_decrypt() for PKCS#1 v1.5 3247 operations 3248 3249= Version 1.1.5 released on 2013-01-16 3250Bugfix 3251 * Fixed MPI assembly for SPARC64 platform 3252 * Handle existence of OpenSSL Trust Extensions at end of X.509 DER blob 3253 * mpi_add_abs() now correctly handles adding short numbers to long numbers 3254 with carry rollover 3255 * Moved mpi_inv_mod() outside POLARSSL_GENPRIME 3256 * Prevent reading over buffer boundaries on X509 certificate parsing 3257 * mpi_exp_mod() now correctly handles negative base numbers (Closes ticket 3258 #52) 3259 * Fixed possible segfault in mpi_shift_r() (found by Manuel 3260 Pégourié-Gonnard) 3261 * Allow R and A to point to same mpi in mpi_div_mpi (found by Manuel 3262 Pégourié-Gonnard) 3263 * Added max length check for rsa_pkcs1_sign with PKCS#1 v2.1 3264 * Memory leak when using RSA_PKCS_V21 operations fixed 3265 * Handle encryption with private key and decryption with public key as per 3266 RFC 2313 3267 * Fixes for MSVC6 3268 3269Security 3270 * Fixed potential memory zeroization on miscrafted RSA key (found by Eloi 3271 Vanderbeken) 3272 3273= Version 1.1.4 released on 2012-05-31 3274Bugfix 3275 * Correctly handle empty SSL/TLS packets (Found by James Yonan) 3276 * Fixed potential heap corruption in x509_name allocation 3277 * Fixed single RSA test that failed on Big Endian systems (Closes ticket #54) 3278 3279= Version 1.1.3 released on 2012-04-29 3280Bugfix 3281 * Fixed random MPI generation to not generate more size than requested. 3282 3283= Version 1.1.2 released on 2012-04-26 3284Bugfix 3285 * Fixed handling error in mpi_cmp_mpi() on longer B values (found by 3286 Hui Dong) 3287 3288Security 3289 * Fixed potential memory corruption on miscrafted client messages (found by 3290 Frama-C team at CEA LIST) 3291 * Fixed generation of DHM parameters to correct length (found by Ruslan 3292 Yushchenko) 3293 3294= Version 1.1.1 released on 2012-01-23 3295Bugfix 3296 * Check for failed malloc() in ssl_set_hostname() and x509_get_entries() 3297 (Closes ticket #47, found by Hugo Leisink) 3298 * Fixed issues with Intel compiler on 64-bit systems (Closes ticket #50) 3299 * Fixed multiple compiler warnings for VS6 and armcc 3300 * Fixed bug in CTR_CRBG selftest 3301 3302= Version 1.1.0 released on 2011-12-22 3303Features 3304 * Added ssl_session_reset() to allow better multi-connection pools of 3305 SSL contexts without needing to set all non-connection-specific 3306 data and pointers again. Adapted ssl_server to use this functionality. 3307 * Added ssl_set_max_version() to allow clients to offer a lower maximum 3308 supported version to a server to help buggy server implementations. 3309 (Closes ticket #36) 3310 * Added cipher_get_cipher_mode() and cipher_get_cipher_operation() 3311 introspection functions (Closes ticket #40) 3312 * Added CTR_DRBG based on AES-256-CTR (NIST SP 800-90) random generator 3313 * Added a generic entropy accumulator that provides support for adding 3314 custom entropy sources and added some generic and platform dependent 3315 entropy sources 3316 3317Changes 3318 * Documentation for AES and Camellia in modes CTR and CFB128 clarified. 3319 * Fixed rsa_encrypt and rsa_decrypt examples to use public key for 3320 encryption and private key for decryption. (Closes ticket #34) 3321 * Inceased maximum size of ASN1 length reads to 32-bits. 3322 * Added an EXPLICIT tag number parameter to x509_get_ext() 3323 * Added a separate CRL entry extension parsing function 3324 * Separated the ASN.1 parsing code from the X.509 specific parsing code. 3325 So now there is a module that is controlled with POLARSSL_ASN1_PARSE_C. 3326 * Changed the defined key-length of DES ciphers in cipher.h to include the 3327 parity bits, to prevent mistakes in copying data. (Closes ticket #33) 3328 * Loads of minimal changes to better support WINCE as a build target 3329 (Credits go to Marco Lizza) 3330 * Added POLARSSL_MPI_WINDOW_SIZE definition to allow easier time to memory 3331 trade-off 3332 * Introduced POLARSSL_MPI_MAX_SIZE and POLARSSL_MPI_MAX_BITS for MPI size 3333 management (Closes ticket #44) 3334 * Changed the used random function pointer to more flexible format. Renamed 3335 havege_rand() to havege_random() to prevent mistakes. Lots of changes as 3336 a consequence in library code and programs 3337 * Moved all examples programs to use the new entropy and CTR_DRBG 3338 * Added permissive certificate parsing to x509parse_crt() and 3339 x509parse_crtfile(). With permissive parsing the parsing does not stop on 3340 encountering a parse-error. Beware that the meaning of return values has 3341 changed! 3342 * All error codes are now negative. Even on mermory failures and IO errors. 3343 3344Bugfix 3345 * Fixed faulty HMAC-MD2 implementation. Found by dibac. (Closes 3346 ticket #37) 3347 * Fixed a bug where the CRL parser expected an EXPLICIT ASN.1 tag 3348 before version numbers 3349 * Allowed X509 key usage parsing to accept 4 byte values instead of the 3350 standard 1 byte version sometimes used by Microsoft. (Closes ticket #38) 3351 * Fixed incorrect behaviour in case of RSASSA-PSS with a salt length 3352 smaller than the hash length. (Closes ticket #41) 3353 * If certificate serial is longer than 32 octets, serial number is now 3354 appended with '....' after first 28 octets 3355 * Improved build support for s390x and sparc64 in bignum.h 3356 * Fixed MS Visual C++ name clash with int64 in sha4.h 3357 * Corrected removal of leading "00:" in printing serial numbers in 3358 certificates and CRLs 3359 3360= Version 1.0.0 released on 2011-07-27 3361Features 3362 * Expanded cipher layer with support for CFB128 and CTR mode 3363 * Added rsa_encrypt and rsa_decrypt simple example programs. 3364 3365Changes 3366 * The generic cipher and message digest layer now have normal error 3367 codes instead of integers 3368 3369Bugfix 3370 * Undid faulty bug fix in ssl_write() when flushing old data (Ticket 3371 #18) 3372 3373= Version 0.99-pre5 released on 2011-05-26 3374Features 3375 * Added additional Cipher Block Modes to symmetric ciphers 3376 (AES CTR, Camellia CTR, XTEA CBC) including the option to 3377 enable and disable individual modes when needed 3378 * Functions requiring File System functions can now be disabled 3379 by undefining POLARSSL_FS_IO 3380 * A error_strerror function() has been added to translate between 3381 error codes and their description. 3382 * Added mpi_get_bit() and mpi_set_bit() individual bit setter/getter 3383 functions. 3384 * Added ssl_mail_client and ssl_fork_server as example programs. 3385 3386Changes 3387 * Major argument / variable rewrite. Introduced use of size_t 3388 instead of int for buffer lengths and loop variables for 3389 better unsigned / signed use. Renamed internal bigint types 3390 t_int and t_dbl to t_uint and t_udbl in the process 3391 * mpi_init() and mpi_free() now only accept a single MPI 3392 argument and do not accept variable argument lists anymore. 3393 * The error codes have been remapped and combining error codes 3394 is now done with a PLUS instead of an OR as error codes 3395 used are negative. 3396 * Changed behaviour of net_read(), ssl_fetch_input() and ssl_recv(). 3397 net_recv() now returns 0 on EOF instead of 3398 POLARSSL_ERR_NET_CONN_RESET. ssl_fetch_input() returns 3399 POLARSSL_ERR_SSL_CONN_EOF on an EOF from its f_recv() function. 3400 ssl_read() returns 0 if a POLARSSL_ERR_SSL_CONN_EOF is received 3401 after the handshake. 3402 * Network functions now return POLARSSL_ERR_NET_WANT_READ or 3403 POLARSSL_ERR_NET_WANT_WRITE instead of the ambiguous 3404 POLARSSL_ERR_NET_TRY_AGAIN 3405 3406= Version 0.99-pre4 released on 2011-04-01 3407Features 3408 * Added support for PKCS#1 v2.1 encoding and thus support 3409 for the RSAES-OAEP and RSASSA-PSS operations. 3410 * Reading of Public Key files incorporated into default x509 3411 functionality as well. 3412 * Added mpi_fill_random() for centralized filling of big numbers 3413 with random data (Fixed ticket #10) 3414 3415Changes 3416 * Debug print of MPI now removes leading zero octets and 3417 displays actual bit size of the value. 3418 * x509parse_key() (and as a consequence x509parse_keyfile()) 3419 does not zeroize memory in advance anymore. Use rsa_init() 3420 before parsing a key or keyfile! 3421 3422Bugfix 3423 * Debug output of MPI's now the same independent of underlying 3424 platform (32-bit / 64-bit) (Fixes ticket #19, found by Mads 3425 Kiilerich and Mihai Militaru) 3426 * Fixed bug in ssl_write() when flushing old data (Fixed ticket 3427 #18, found by Nikolay Epifanov) 3428 * Fixed proper handling of RSASSA-PSS verification with variable 3429 length salt lengths 3430 3431= Version 0.99-pre3 released on 2011-02-28 3432This release replaces version 0.99-pre2 which had possible copyright issues. 3433Features 3434 * Parsing PEM private keys encrypted with DES and AES 3435 are now supported as well (Fixes ticket #5) 3436 * Added crl_app program to allow easy reading and 3437 printing of X509 CRLs from file 3438 3439Changes 3440 * Parsing of PEM files moved to separate module (Fixes 3441 ticket #13). Also possible to remove PEM support for 3442 systems only using DER encoding 3443 3444Bugfixes 3445 * Corrected parsing of UTCTime dates before 1990 and 3446 after 1950 3447 * Support more exotic OID's when parsing certificates 3448 (found by Mads Kiilerich) 3449 * Support more exotic name representations when parsing 3450 certificates (found by Mads Kiilerich) 3451 * Replaced the expired test certificates 3452 * Do not bail out if no client certificate specified. Try 3453 to negotiate anonymous connection (Fixes ticket #12, 3454 found by Boris Krasnovskiy) 3455 3456Security fixes 3457 * Fixed a possible Man-in-the-Middle attack on the 3458 Diffie Hellman key exchange (thanks to Larry Highsmith, 3459 Subreption LLC) 3460 3461= Version 0.99-pre1 released on 2011-01-30 3462Features 3463Note: Most of these features have been donated by Fox-IT 3464 * Added Doxygen source code documentation parts 3465 * Added reading of DHM context from memory and file 3466 * Improved X509 certificate parsing to include extended 3467 certificate fields, including Key Usage 3468 * Improved certificate verification and verification 3469 against the available CRLs 3470 * Detection for DES weak keys and parity bits added 3471 * Improvements to support integration in other 3472 applications: 3473 + Added generic message digest and cipher wrapper 3474 + Improved information about current capabilities, 3475 status, objects and configuration 3476 + Added verification callback on certificate chain 3477 verification to allow external blacklisting 3478 + Additional example programs to show usage 3479 * Added support for PKCS#11 through the use of the 3480 libpkcs11-helper library 3481 3482Changes 3483 * x509parse_time_expired() checks time in addition to 3484 the existing date check 3485 * The ciphers member of ssl_context and the cipher member 3486 of ssl_session have been renamed to ciphersuites and 3487 ciphersuite respectively. This clarifies the difference 3488 with the generic cipher layer and is better naming 3489 altogether 3490 3491= Version 0.14.0 released on 2010-08-16 3492Features 3493 * Added support for SSL_EDH_RSA_AES_128_SHA and 3494 SSL_EDH_RSA_CAMELLIA_128_SHA ciphersuites 3495 * Added compile-time and run-time version information 3496 * Expanded ssl_client2 arguments for more flexibility 3497 * Added support for TLS v1.1 3498 3499Changes 3500 * Made Makefile cleaner 3501 * Removed dependency on rand() in rsa_pkcs1_encrypt(). 3502 Now using random fuction provided to function and 3503 changed the prototype of rsa_pkcs1_encrypt(), 3504 rsa_init() and rsa_gen_key(). 3505 * Some SSL defines were renamed in order to avoid 3506 future confusion 3507 3508Bug fixes 3509 * Fixed CMake out of source build for tests (found by 3510 kkert) 3511 * rsa_check_private() now supports PKCS1v2 keys as well 3512 * Fixed deadlock in rsa_pkcs1_encrypt() on failing random 3513 generator 3514 3515= Version 0.13.1 released on 2010-03-24 3516Bug fixes 3517 * Fixed Makefile in library that was mistakenly merged 3518 * Added missing const string fixes 3519 3520= Version 0.13.0 released on 2010-03-21 3521Features 3522 * Added option parsing for host and port selection to 3523 ssl_client2 3524 * Added support for GeneralizedTime in X509 parsing 3525 * Added cert_app program to allow easy reading and 3526 printing of X509 certificates from file or SSL 3527 connection. 3528 3529Changes 3530 * Added const correctness for main code base 3531 * X509 signature algorithm determination is now 3532 in a function to allow easy future expansion 3533 * Changed symmetric cipher functions to 3534 identical interface (returning int result values) 3535 * Changed ARC4 to use separate input/output buffer 3536 * Added reset function for HMAC context as speed-up 3537 for specific use-cases 3538 3539Bug fixes 3540 * Fixed bug resulting in failure to send the last 3541 certificate in the chain in ssl_write_certificate() and 3542 ssl_write_certificate_request() (found by fatbob) 3543 * Added small fixes for compiler warnings on a Mac 3544 (found by Frank de Brabander) 3545 * Fixed algorithmic bug in mpi_is_prime() (found by 3546 Smbat Tonoyan) 3547 3548= Version 0.12.1 released on 2009-10-04 3549Changes 3550 * Coverage test definitions now support 'depends_on' 3551 tagging system. 3552 * Tests requiring specific hashing algorithms now honor 3553 the defines. 3554 3555Bug fixes 3556 * Changed typo in #ifdef in x509parse.c (found 3557 by Eduardo) 3558 3559= Version 0.12.0 released on 2009-07-28 3560Features 3561 * Added CMake makefiles as alternative to regular Makefiles. 3562 * Added preliminary Code Coverage tests for AES, ARC4, 3563 Base64, MPI, SHA-family, MD-family, HMAC-SHA-family, 3564 Camellia, DES, 3-DES, RSA PKCS#1, XTEA, Diffie-Hellman 3565 and X509parse. 3566 3567Changes 3568 * Error codes are not (necessarily) negative. Keep 3569 this is mind when checking for errors. 3570 * RSA_RAW renamed to SIG_RSA_RAW for consistency. 3571 * Fixed typo in name of POLARSSL_ERR_RSA_OUTPUT_TOO_LARGE. 3572 * Changed interface for AES and Camellia setkey functions 3573 to indicate invalid key lengths. 3574 3575Bug fixes 3576 * Fixed include location of endian.h on FreeBSD (found by 3577 Gabriel) 3578 * Fixed include location of endian.h and name clash on 3579 Apples (found by Martin van Hensbergen) 3580 * Fixed HMAC-MD2 by modifying md2_starts(), so that the 3581 required HMAC ipad and opad variables are not cleared. 3582 (found by code coverage tests) 3583 * Prevented use of long long in bignum if 3584 POLARSSL_HAVE_LONGLONG not defined (found by Giles 3585 Bathgate). 3586 * Fixed incorrect handling of negative strings in 3587 mpi_read_string() (found by code coverage tests). 3588 * Fixed segfault on handling empty rsa_context in 3589 rsa_check_pubkey() and rsa_check_privkey() (found by 3590 code coverage tests). 3591 * Fixed incorrect handling of one single negative input 3592 value in mpi_add_abs() (found by code coverage tests). 3593 * Fixed incorrect handling of negative first input 3594 value in mpi_sub_abs() (found by code coverage tests). 3595 * Fixed incorrect handling of negative first input 3596 value in mpi_mod_mpi() and mpi_mod_int(). Resulting 3597 change also affects mpi_write_string() (found by code 3598 coverage tests). 3599 * Corrected is_prime() results for 0, 1 and 2 (found by 3600 code coverage tests). 3601 * Fixed Camellia and XTEA for 64-bit Windows systems. 3602 3603= Version 0.11.1 released on 2009-05-17 3604 * Fixed missing functionality for SHA-224, SHA-256, SHA384, 3605 SHA-512 in rsa_pkcs1_sign() 3606 3607= Version 0.11.0 released on 2009-05-03 3608 * Fixed a bug in mpi_gcd() so that it also works when both 3609 input numbers are even and added testcases to check 3610 (found by Pierre Habouzit). 3611 * Added support for SHA-224, SHA-256, SHA-384 and SHA-512 3612 one way hash functions with the PKCS#1 v1.5 signing and 3613 verification. 3614 * Fixed minor bug regarding mpi_gcd located within the 3615 POLARSSL_GENPRIME block. 3616 * Fixed minor memory leak in x509parse_crt() and added better 3617 handling of 'full' certificate chains (found by Mathias 3618 Olsson). 3619 * Centralized file opening and reading for x509 files into 3620 load_file() 3621 * Made definition of net_htons() endian-clean for big endian 3622 systems (Found by Gernot). 3623 * Undefining POLARSSL_HAVE_ASM now also handles prevents asm in 3624 padlock and timing code. 3625 * Fixed an off-by-one buffer allocation in ssl_set_hostname() 3626 responsible for crashes and unwanted behaviour. 3627 * Added support for Certificate Revocation List (CRL) parsing. 3628 * Added support for CRL revocation to x509parse_verify() and 3629 SSL/TLS code. 3630 * Fixed compatibility of XTEA and Camellia on a 64-bit system 3631 (found by Felix von Leitner). 3632 3633= Version 0.10.0 released on 2009-01-12 3634 * Migrated XySSL to PolarSSL 3635 * Added XTEA symmetric cipher 3636 * Added Camellia symmetric cipher 3637 * Added support for ciphersuites: SSL_RSA_CAMELLIA_128_SHA, 3638 SSL_RSA_CAMELLIA_256_SHA and SSL_EDH_RSA_CAMELLIA_256_SHA 3639 * Fixed dangerous bug that can cause a heap overflow in 3640 rsa_pkcs1_decrypt (found by Christophe Devine) 3641 3642================================================================ 3643XySSL ChangeLog 3644 3645= Version 0.9 released on 2008-03-16 3646 3647 * Added support for ciphersuite: SSL_RSA_AES_128_SHA 3648 * Enabled support for large files by default in aescrypt2.c 3649 * Preliminary openssl wrapper contributed by David Barrett 3650 * Fixed a bug in ssl_write() that caused the same payload to 3651 be sent twice in non-blocking mode when send returns EAGAIN 3652 * Fixed ssl_parse_client_hello(): session id and challenge must 3653 not be swapped in the SSLv2 ClientHello (found by Greg Robson) 3654 * Added user-defined callback debug function (Krystian Kolodziej) 3655 * Before freeing a certificate, properly zero out all cert. data 3656 * Fixed the "mode" parameter so that encryption/decryption are 3657 not swapped on PadLock; also fixed compilation on older versions 3658 of gcc (bug reported by David Barrett) 3659 * Correctly handle the case in padlock_xcryptcbc() when input or 3660 output data is non-aligned by falling back to the software 3661 implementation, as VIA Nehemiah cannot handle non-aligned buffers 3662 * Fixed a memory leak in x509parse_crt() which was reported by Greg 3663 Robson-Garth; some x509write.c fixes by Pascal Vizeli, thanks to 3664 Matthew Page who reported several bugs 3665 * Fixed x509_get_ext() to accept some rare certificates which have 3666 an INTEGER instead of a BOOLEAN for BasicConstraints::cA. 3667 * Added support on the client side for the TLS "hostname" extension 3668 (patch contributed by David Patino) 3669 * Make x509parse_verify() return BADCERT_CN_MISMATCH when an empty 3670 string is passed as the CN (bug reported by spoofy) 3671 * Added an option to enable/disable the BN assembly code 3672 * Updated rsa_check_privkey() to verify that (D*E) = 1 % (P-1)*(Q-1) 3673 * Disabled obsolete hash functions by default (MD2, MD4); updated 3674 selftest and benchmark to not test ciphers that have been disabled 3675 * Updated x509parse_cert_info() to correctly display byte 0 of the 3676 serial number, setup correct server port in the ssl client example 3677 * Fixed a critical denial-of-service with X.509 cert. verification: 3678 peer may cause xyssl to loop indefinitely by sending a certificate 3679 for which the RSA signature check fails (bug reported by Benoit) 3680 * Added test vectors for: AES-CBC, AES-CFB, DES-CBC and 3DES-CBC, 3681 HMAC-MD5, HMAC-SHA1, HMAC-SHA-256, HMAC-SHA-384, and HMAC-SHA-512 3682 * Fixed HMAC-SHA-384 and HMAC-SHA-512 (thanks to Josh Sinykin) 3683 * Modified ssl_parse_client_key_exchange() to protect against 3684 Daniel Bleichenbacher attack on PKCS#1 v1.5 padding, as well 3685 as the Klima-Pokorny-Rosa extension of Bleichenbacher's attack 3686 * Updated rsa_gen_key() so that ctx->N is always nbits in size 3687 * Fixed assembly PPC compilation errors on Mac OS X, thanks to 3688 David Barrett and Dusan Semen 3689 3690= Version 0.8 released on 2007-10-20 3691 3692 * Modified the HMAC functions to handle keys larger 3693 than 64 bytes, thanks to Stephane Desneux and gary ng 3694 * Fixed ssl_read_record() to properly update the handshake 3695 message digests, which fixes IE6/IE7 client authentication 3696 * Cleaned up the XYSSL* #defines, suggested by Azriel Fasten 3697 * Fixed net_recv(), thanks to Lorenz Schori and Egon Kocjan 3698 * Added user-defined callbacks for handling I/O and sessions 3699 * Added lots of debugging output in the SSL/TLS functions 3700 * Added preliminary X.509 cert. writing by Pascal Vizeli 3701 * Added preliminary support for the VIA PadLock routines 3702 * Added AES-CFB mode of operation, contributed by chmike 3703 * Added an SSL/TLS stress testing program (ssl_test.c) 3704 * Updated the RSA PKCS#1 code to allow choosing between 3705 RSA_PUBLIC and RSA_PRIVATE, as suggested by David Barrett 3706 * Updated ssl_read() to skip 0-length records from OpenSSL 3707 * Fixed the make install target to comply with *BSD make 3708 * Fixed a bug in mpi_read_binary() on 64-bit platforms 3709 * mpi_is_prime() speedups, thanks to Kevin McLaughlin 3710 * Fixed a long standing memory leak in mpi_is_prime() 3711 * Replaced realloc with malloc in mpi_grow(), and set 3712 the sign of zero as positive in mpi_init() (reported 3713 by Jonathan M. McCune) 3714 3715= Version 0.7 released on 2007-07-07 3716 3717 * Added support for the MicroBlaze soft-core processor 3718 * Fixed a bug in ssl_tls.c which sometimes prevented SSL 3719 connections from being established with non-blocking I/O 3720 * Fixed a couple bugs in the VS6 and UNIX Makefiles 3721 * Fixed the "PIC register ebx clobbered in asm" bug 3722 * Added HMAC starts/update/finish support functions 3723 * Added the SHA-224, SHA-384 and SHA-512 hash functions 3724 * Fixed the net_set_*block routines, thanks to Andreas 3725 * Added a few demonstration programs: md5sum, sha1sum, 3726 dh_client, dh_server, rsa_genkey, rsa_sign, rsa_verify 3727 * Added new bignum import and export helper functions 3728 * Rewrote README.txt in program/ssl/ca to better explain 3729 how to create a test PKI 3730 3731= Version 0.6 released on 2007-04-01 3732 3733 * Ciphers used in SSL/TLS can now be disabled at compile 3734 time, to reduce the memory footprint on embedded systems 3735 * Added multiply assembly code for the TriCore and modified 3736 havege_struct for this processor, thanks to David Patiño 3737 * Added multiply assembly code for 64-bit PowerPCs, 3738 thanks to Peking University and the OSU Open Source Lab 3739 * Added experimental support of Quantum Cryptography 3740 * Added support for autoconf, contributed by Arnaud Cornet 3741 * Fixed "long long" compilation issues on IA-64 and PPC64 3742 * Fixed a bug introduced in xyssl-0.5/timing.c: hardclock 3743 was not being correctly defined on ARM and MIPS 3744 3745= Version 0.5 released on 2007-03-01 3746 3747 * Added multiply assembly code for SPARC and Alpha 3748 * Added (beta) support for non-blocking I/O operations 3749 * Implemented session resuming and client authentication 3750 * Fixed some portability issues on WinCE, MINIX 3, Plan9 3751 (thanks to Benjamin Newman), HP-UX, FreeBSD and Solaris 3752 * Improved the performance of the EDH key exchange 3753 * Fixed a bug that caused valid packets with a payload 3754 size of 16384 bytes to be rejected 3755 3756= Version 0.4 released on 2007-02-01 3757 3758 * Added support for Ephemeral Diffie-Hellman key exchange 3759 * Added multiply asm code for SSE2, ARM, PPC, MIPS and M68K 3760 * Various improvement to the modular exponentiation code 3761 * Rewrote the headers to generate the API docs with doxygen 3762 * Fixed a bug in ssl_encrypt_buf (incorrect padding was 3763 generated) and in ssl_parse_client_hello (max. client 3764 version was not properly set), thanks to Didier Rebeix 3765 * Fixed another bug in ssl_parse_client_hello: clients with 3766 cipherlists larger than 96 bytes were incorrectly rejected 3767 * Fixed a couple memory leak in x509_read.c 3768 3769= Version 0.3 released on 2007-01-01 3770 3771 * Added server-side SSLv3 and TLSv1.0 support 3772 * Multiple fixes to enhance the compatibility with g++, 3773 thanks to Xosé Antón Otero Ferreira 3774 * Fixed a bug in the CBC code, thanks to dowst; also, 3775 the bignum code is no longer dependent on long long 3776 * Updated rsa_pkcs1_sign to handle arbitrary large inputs 3777 * Updated timing.c for improved compatibility with i386 3778 and 486 processors, thanks to Arnaud Cornet 3779 3780= Version 0.2 released on 2006-12-01 3781 3782 * Updated timing.c to support ARM and MIPS arch 3783 * Updated the MPI code to support 8086 on MSVC 1.5 3784 * Added the copyright notice at the top of havege.h 3785 * Fixed a bug in sha2_hmac, thanks to newsoft/Wenfang Zhang 3786 * Fixed a bug reported by Adrian Rüegsegger in x509_read_key 3787 * Fixed a bug reported by Torsten Lauter in ssl_read_record 3788 * Fixed a bug in rsa_check_privkey that would wrongly cause 3789 valid RSA keys to be dismissed (thanks to oldwolf) 3790 * Fixed a bug in mpi_is_prime that caused some primes to fail 3791 the Miller-Rabin primality test 3792 3793 I'd also like to thank Younès Hafri for the CRUX linux port, 3794 Khalil Petit who added XySSL into pkgsrc and Arnaud Cornet 3795 who maintains the Debian package :-) 3796 3797= Version 0.1 released on 2006-11-01 3798