merge conflicts between 1.1.1t and 3.0.8

Import OpenSSL 3.0.8, last import was 1.1.1t

### Major changes between OpenSSL 3.0.7 and OpenSSL 3.0.8 [7 Feb 2023]

* Fixed NULL dereference during PKCS7 data verification ([CVE-2023-0401])
* F

Import OpenSSL 3.0.8, last import was 1.1.1t

### Major changes between OpenSSL 3.0.7 and OpenSSL 3.0.8 [7 Feb 2023]

* Fixed NULL dereference during PKCS7 data verification ([CVE-2023-0401])
* Fixed X.400 address type confusion in X.509 GeneralName ([CVE-2023-0286])
* Fixed NULL dereference validating DSA public key ([CVE-2023-0217])
* Fixed Invalid pointer dereference in d2i_PKCS7 functions ([CVE-2023-0216])
* Fixed Use-after-free following BIO_new_NDEF ([CVE-2023-0215])
* Fixed Double free after calling PEM_read_bio_ex ([CVE-2022-4450])
* Fixed Timing Oracle in RSA Decryption ([CVE-2022-4304])
* Fixed X.509 Name Constraints Read Buffer Overflow ([CVE-2022-4203])
* Fixed X.509 Policy Constraints Double Locking ([CVE-2022-3996])

### Major changes between OpenSSL 3.0.6 and OpenSSL 3.0.7 [1 Nov 2022]

* Added RIPEMD160 to the default provider.
* Fixed regressions introduced in 3.0.6 version.
* Fixed two buffer overflows in punycode decoding functions.
([CVE-2022-3786]) and ([CVE-2022-3602])

### Major changes between OpenSSL 3.0.5 and OpenSSL 3.0.6 [11 Oct 2022]

* Fix for custom ciphers to prevent accidental use of NULL encryption
([CVE-2022-3358])

### Major changes between OpenSSL 3.0.4 and OpenSSL 3.0.5 [5 Jul 2022]

* Fixed heap memory corruption with RSA private key operation
([CVE-2022-2274])
* Fixed AES OCB failure to encrypt some bytes on 32-bit x86 platforms
([CVE-2022-2097])

### Major changes between OpenSSL 3.0.3 and OpenSSL 3.0.4 [21 Jun 2022]

* Fixed additional bugs in the c_rehash script which was not properly
sanitising shell metacharacters to prevent command injection
([CVE-2022-2068])

### Major changes between OpenSSL 3.0.2 and OpenSSL 3.0.3 [3 May 2022]

* Fixed a bug in the c_rehash script which was not properly sanitising shell
metacharacters to prevent command injection ([CVE-2022-1292])
* Fixed a bug in the function `OCSP_basic_verify` that verifies the signer
certificate on an OCSP response ([CVE-2022-1343])
* Fixed a bug where the RC4-MD5 ciphersuite incorrectly used the
AAD data as the MAC key ([CVE-2022-1434])
* Fix a bug in the OPENSSL_LH_flush() function that breaks reuse of the memory
occuppied by the removed hash table entries ([CVE-2022-1473])

### Major changes between OpenSSL 3.0.1 and OpenSSL 3.0.2 [15 Mar 2022]

* Fixed a bug in the BN_mod_sqrt() function that can cause it to loop forever
for non-prime moduli ([CVE-2022-0778])

### Major changes between OpenSSL 3.0.0 and OpenSSL 3.0.1 [14 Dec 2021]

* Fixed invalid handling of X509_verify_cert() internal errors in libssl
([CVE-2021-4044])
* Allow fetching an operation from the provider that owns an unexportable key
as a fallback if that is still allowed by the property query.

### Major changes between OpenSSL 1.1.1 and OpenSSL 3.0.0 [7 sep 2021]

* Enhanced 'openssl list' with many new options.
* Added migration guide to man7.
* Implemented support for fully "pluggable" TLSv1.3 groups.
* Added suport for Kernel TLS (KTLS).
* Changed the license to the Apache License v2.0.
* Moved all variations of the EVP ciphers CAST5, BF, IDEA, SEED, RC2,
RC4, RC5, and DES to the legacy provider.
* Moved the EVP digests MD2, MD4, MDC2, WHIRLPOOL and RIPEMD-160 to the legacy
provider.
* Added convenience functions for generating asymmetric key pairs.
* Deprecated the `OCSP_REQ_CTX` type and functions.
* Deprecated the `EC_KEY` and `EC_KEY_METHOD` types and functions.
* Deprecated the `RSA` and `RSA_METHOD` types and functions.
* Deprecated the `DSA` and `DSA_METHOD` types and functions.
* Deprecated the `DH` and `DH_METHOD` types and functions.
* Deprecated the `ERR_load_` functions.
* Remove the `RAND_DRBG` API.
* Deprecated the `ENGINE` API.
* Added `OSSL_LIB_CTX`, a libcrypto library context.
* Added various `_ex` functions to the OpenSSL API that support using
a non-default `OSSL_LIB_CTX`.
* Interactive mode is removed from the 'openssl' program.
* The X25519, X448, Ed25519, Ed448, SHAKE128 and SHAKE256 algorithms are
included in the FIPS provider.
* X509 certificates signed using SHA1 are no longer allowed at security
level 1 or higher. The default security level for TLS is 1, so
certificates signed using SHA1 are by default no longer trusted to
authenticate servers or clients.
* enable-crypto-mdebug and enable-crypto-mdebug-backtrace were mostly
disabled; the project uses address sanitize/leak-detect instead.
* Added a Certificate Management Protocol (CMP, RFC 4210) implementation
also covering CRMF (RFC 4211) and HTTP transfer (RFC 6712).
It is part of the crypto lib and adds a 'cmp' app with a demo configuration.
All widely used CMP features are supported for both clients and servers.
* Added a proper HTTP client supporting GET with optional redirection, POST,
arbitrary request and response content types, TLS, persistent connections,
connections via HTTP(s) proxies, connections and exchange via user-defined
BIOs (allowing implicit connections), and timeout checks.
* Added util/check-format.pl for checking adherence to the coding guidelines.
* Added OSSL_ENCODER, a generic encoder API.
* Added OSSL_DECODER, a generic decoder API.
* Added OSSL_PARAM_BLD, an easier to use API to OSSL_PARAM.
* Added error raising macros, ERR_raise() and ERR_raise_data().
* Deprecated ERR_put_error(), ERR_get_error_line(), ERR_get_error_line_data(),
ERR_peek_error_line_data(), ERR_peek_last_error_line_data() and
ERR_func_error_string().
* Added OSSL_PROVIDER_available(), to check provider availibility.
* Added 'openssl mac' that uses the EVP_MAC API.
* Added 'openssl kdf' that uses the EVP_KDF API.
* Add OPENSSL_info() and 'openssl info' to get built-in data.
* Add support for enabling instrumentation through trace and debug
output.
* Changed our version number scheme and set the next major release to
3.0.0
* Added EVP_MAC, an EVP layer MAC API, and a generic EVP_PKEY to EVP_MAC
bridge. Supported MACs are: BLAKE2, CMAC, GMAC, HMAC, KMAC, POLY1305
and SIPHASH.
* Removed the heartbeat message in DTLS feature.
* Added EVP_KDF, an EVP layer KDF and PRF API, and a generic EVP_PKEY to
EVP_KDF bridge. Supported KDFs are: HKDF, KBKDF, KRB5 KDF, PBKDF2,
PKCS12 KDF, SCRYPT, SSH KDF, SSKDF, TLS1 PRF, X9.42 KDF and X9.63 KDF.
* All of the low-level MD2, MD4, MD5, MDC2, RIPEMD160, SHA1, SHA224,
SHA256, SHA384, SHA512 and Whirlpool digest functions have been
deprecated.
* All of the low-level AES, Blowfish, Camellia, CAST, DES, IDEA, RC2,
RC4, RC5 and SEED cipher functions have been deprecated.
* All of the low-level DH, DSA, ECDH, ECDSA and RSA public key functions
have been deprecated.
* SSL 3, TLS 1.0, TLS 1.1, and DTLS 1.0 only work at security level 0,
except when RSA key exchange without SHA1 is used.
* Added providers, a new pluggability concept that will replace the
ENGINE API and ENGINE implementations.

OpenSSL 1.1.1
-------------

### Major changes between OpenSSL 1.1.1k and OpenSSL 1.1.1l [24 Aug 2021]

* Fixed an SM2 Decryption Buffer Overflow ([CVE-2021-3711])
* Fixed various read buffer overruns processing ASN.1 strings ([CVE-2021-3712])

### Major changes between OpenSSL 1.1.1j and OpenSSL 1.1.1k [25 Mar 2021]

* Fixed a problem with verifying a certificate chain when using the
X509_V_FLAG_X509_STRICT flag ([CVE-2021-3450])
* Fixed an issue where an OpenSSL TLS server may crash if sent a maliciously
crafted renegotiation ClientHello message from a client ([CVE-2021-3449])

### Major changes between OpenSSL 1.1.1i and OpenSSL 1.1.1j [16 Feb 2021]

* Fixed a NULL pointer deref in the X509_issuer_and_serial_hash()
function ([CVE-2021-23841])
* Fixed the RSA_padding_check_SSLv23() function and the RSA_SSLV23_PADDING
padding mode to correctly check for rollback attacks
* Fixed an overflow in the EVP_CipherUpdate, EVP_EncryptUpdate and
EVP_DecryptUpdate functions ([CVE-2021-23840])
* Fixed SRP_Calc_client_key so that it runs in constant time

### Major changes between OpenSSL 1.1.1h and OpenSSL 1.1.1i [8 Dec 2020]

* Fixed NULL pointer deref in GENERAL_NAME_cmp ([CVE-2020-1971])

### Major changes between OpenSSL 1.1.1g and OpenSSL 1.1.1h [22 Sep 2020]

* Disallow explicit curve parameters in verifications chains when
X509_V_FLAG_X509_STRICT is used
* Enable 'MinProtocol' and 'MaxProtocol' to configure both TLS and DTLS
contexts
* Oracle Developer Studio will start reporting deprecation warnings

### Major changes between OpenSSL 1.1.1f and OpenSSL 1.1.1g [21 Apr 2020]

* Fixed segmentation fault in SSL_check_chain() ([CVE-2020-1967])

### Major changes between OpenSSL 1.1.1e and OpenSSL 1.1.1f [31 Mar 2020]

* Revert the unexpected EOF reporting via SSL_ERROR_SSL

### Major changes between OpenSSL 1.1.1d and OpenSSL 1.1.1e [17 Mar 2020]

* Fixed an overflow bug in the x64_64 Montgomery squaring procedure
used in exponentiation with 512-bit moduli ([CVE-2019-1551])

### Major changes between OpenSSL 1.1.1c and OpenSSL 1.1.1d [10 Sep 2019]

* Fixed a fork protection issue ([CVE-2019-1549])
* Fixed a padding oracle in PKCS7_dataDecode and CMS_decrypt_set1_pkey
([CVE-2019-1563])
* For built-in EC curves, ensure an EC_GROUP built from the curve name is
used even when parsing explicit parameters
* Compute ECC cofactors if not provided during EC_GROUP construction
([CVE-2019-1547])
* Early start up entropy quality from the DEVRANDOM seed source has been
improved for older Linux systems
* Correct the extended master secret constant on EBCDIC systems
* Use Windows installation paths in the mingw builds ([CVE-2019-1552])
* Changed DH_check to accept parameters with order q and 2q subgroups
* Significantly reduce secure memory usage by the randomness pools
* Revert the DEVRANDOM_WAIT feature for Linux systems

### Major changes between OpenSSL 1.1.1b and OpenSSL 1.1.1c [28 May 2019]

* Prevent over long nonces in ChaCha20-Poly1305 ([CVE-2019-1543])

### Major changes between OpenSSL 1.1.1a and OpenSSL 1.1.1b [26 Feb 2019]

* Change the info callback signals for the start and end of a post-handshake
message exchange in TLSv1.3.
* Fix a bug in DTLS over SCTP. This breaks interoperability with older
versions of OpenSSL like OpenSSL 1.1.0 and OpenSSL 1.0.2.

### Major changes between OpenSSL 1.1.1 and OpenSSL 1.1.1a [20 Nov 2018]

* Timing vulnerability in DSA signature generation ([CVE-2018-0734])
* Timing vulnerability in ECDSA signature generation ([CVE-2018-0735])

### Major changes between OpenSSL 1.1.0i and OpenSSL 1.1.1 [11 Sep 2018]

* Support for TLSv1.3 added. The TLSv1.3 implementation includes:
* Fully compliant implementation of RFC8446 (TLSv1.3) on by default
* Early data (0-RTT)
* Post-handshake authentication and key update
* Middlebox Compatibility Mode
* TLSv1.3 PSKs
* Support for all five RFC8446 ciphersuites
* RSA-PSS signature algorithms (backported to TLSv1.2)
* Configurable session ticket support
* Stateless server support
* Rewrite of the packet construction code for "safer" packet handling
* Rewrite of the extension handling code
For further important information, see the [TLS1.3 page](
https://wiki.openssl.org/index.php/TLS1.3) in the OpenSSL Wiki.

* Complete rewrite of the OpenSSL random number generator to introduce the
following capabilities
* The default RAND method now utilizes an AES-CTR DRBG according to
NIST standard SP 800-90Ar1.
* Support for multiple DRBG instances with seed chaining.
* There is a public and private DRBG instance.
* The DRBG instances are fork-safe.
* Keep all global DRBG instances on the secure heap if it is enabled.
* The public and private DRBG instance are per thread for lock free
operation
* Support for various new cryptographic algorithms including:
* SHA3
* SHA512/224 and SHA512/256
* EdDSA (both Ed25519 and Ed448) including X509 and TLS support
* X448 (adding to the existing X25519 support in 1.1.0)
* Multi-prime RSA
* SM2
* SM3
* SM4
* SipHash
* ARIA (including TLS support)
* Significant Side-Channel attack security improvements
* Add a new ClientHello callback to provide the ability to adjust the SSL
object at an early stage.
* Add 'Maximum Fragment Length' TLS extension negotiation and support
* A new STORE module, which implements a uniform and URI based reader of
stores that can contain keys, certificates, CRLs and numerous other
objects.
* Move the display of configuration data to configdata.pm.
* Allow GNU style "make variables" to be used with Configure.
* Claim the namespaces OSSL and OPENSSL, represented as symbol prefixes
* Rewrite of devcrypto engine

show more ...

OpenSSL CHANGES
_______________

This is a high-level summary of the most important changes.
For a full list of changes, see the git commit log; for example,
https://github.com/openssl/openssl/co

OpenSSL CHANGES
_______________

This is a high-level summary of the most important changes.
For a full list of changes, see the git commit log; for example,
https://github.com/openssl/openssl/commits/ and pick the appropriate
release branch.

Changes between 1.1.0i and 1.1.1 [11 Sep 2018]

*) Add a new ClientHello callback. Provides a callback interface that gives
the application the ability to adjust the nascent SSL object at the
earliest stage of ClientHello processing, immediately after extensions have
been collected but before they have been processed. In particular, this
callback can adjust the supported TLS versions in response to the contents
of the ClientHello
[Benjamin Kaduk]

*) Add SM2 base algorithm support.
[Jack Lloyd]

*) s390x assembly pack: add (improved) hardware-support for the following
cryptographic primitives: sha3, shake, aes-gcm, aes-ccm, aes-ctr, aes-ofb,
aes-cfb/cfb8, aes-ecb.
[Patrick Steuer]

*) Make EVP_PKEY_asn1_new() a bit stricter about its input. A NULL pem_str
parameter is no longer accepted, as it leads to a corrupt table. NULL
pem_str is reserved for alias entries only.
[Richard Levitte]

*) Use the new ec_scalar_mul_ladder scaffold to implement a specialized ladder
step for prime curves. The new implementation is based on formulae from
differential addition-and-doubling in homogeneous projective coordinates
from Izu-Takagi "A fast parallel elliptic curve multiplication resistant
against side channel attacks" and Brier-Joye "Weierstrass Elliptic Curves
and Side-Channel Attacks" Eq. (8) for y-coordinate recovery, modified
to work in projective coordinates.
[Billy Bob Brumley, Nicola Tuveri]

*) Change generating and checking of primes so that the error rate of not
being prime depends on the intended use based on the size of the input.
For larger primes this will result in more rounds of Miller-Rabin.
The maximal error rate for primes with more than 1080 bits is lowered
to 2^-128.
[Kurt Roeckx, Annie Yousar]

*) Increase the number of Miller-Rabin rounds for DSA key generating to 64.
[Kurt Roeckx]

*) The 'tsget' script is renamed to 'tsget.pl', to avoid confusion when
moving between systems, and to avoid confusion when a Windows build is
done with mingw vs with MSVC. For POSIX installs, there's still a
symlink or copy named 'tsget' to avoid that confusion as well.
[Richard Levitte]

*) Revert blinding in ECDSA sign and instead make problematic addition
length-invariant. Switch even to fixed-length Montgomery multiplication.
[Andy Polyakov]

*) Use the new ec_scalar_mul_ladder scaffold to implement a specialized ladder
step for binary curves. The new implementation is based on formulae from
differential addition-and-doubling in mixed Lopez-Dahab projective
coordinates, modified to independently blind the operands.
[Billy Bob Brumley, Sohaib ul Hassan, Nicola Tuveri]

*) Add a scaffold to optionally enhance the Montgomery ladder implementation
for `ec_scalar_mul_ladder` (formerly `ec_mul_consttime`) allowing
EC_METHODs to implement their own specialized "ladder step", to take
advantage of more favorable coordinate systems or more efficient
differential addition-and-doubling algorithms.
[Billy Bob Brumley, Sohaib ul Hassan, Nicola Tuveri]

*) Modified the random device based seed sources to keep the relevant
file descriptors open rather than reopening them on each access.
This allows such sources to operate in a chroot() jail without
the associated device nodes being available. This behaviour can be
controlled using RAND_keep_random_devices_open().
[Paul Dale]

*) Numerous side-channel attack mitigations have been applied. This may have
performance impacts for some algorithms for the benefit of improved
security. Specific changes are noted in this change log by their respective
authors.
[Matt Caswell]

*) AIX shared library support overhaul. Switch to AIX "natural" way of
handling shared libraries, which means collecting shared objects of
different versions and bitnesses in one common archive. This allows to
mitigate conflict between 1.0 and 1.1 side-by-side installations. It
doesn't affect the way 3rd party applications are linked, only how
multi-version installation is managed.
[Andy Polyakov]

*) Make ec_group_do_inverse_ord() more robust and available to other
EC cryptosystems, so that irrespective of BN_FLG_CONSTTIME, SCA
mitigations are applied to the fallback BN_mod_inverse().
When using this function rather than BN_mod_inverse() directly, new
EC cryptosystem implementations are then safer-by-default.
[Billy Bob Brumley]

*) Add coordinate blinding for EC_POINT and implement projective
coordinate blinding for generic prime curves as a countermeasure to
chosen point SCA attacks.
[Sohaib ul Hassan, Nicola Tuveri, Billy Bob Brumley]

*) Add blinding to ECDSA and DSA signatures to protect against side channel
attacks discovered by Keegan Ryan (NCC Group).
[Matt Caswell]

*) Enforce checking in the pkeyutl command line app to ensure that the input
length does not exceed the maximum supported digest length when performing
a sign, verify or verifyrecover operation.
[Matt Caswell]

*) SSL_MODE_AUTO_RETRY is enabled by default. Applications that use blocking
I/O in combination with something like select() or poll() will hang. This
can be turned off again using SSL_CTX_clear_mode().
Many applications do not properly handle non-application data records, and
TLS 1.3 sends more of such records. Setting SSL_MODE_AUTO_RETRY works
around the problems in those applications, but can also break some.
It's recommended to read the manpages about SSL_read(), SSL_write(),
SSL_get_error(), SSL_shutdown(), SSL_CTX_set_mode() and
SSL_CTX_set_read_ahead() again.
[Kurt Roeckx]

*) When unlocking a pass phrase protected PEM file or PKCS#8 container, we
now allow empty (zero character) pass phrases.
[Richard Levitte]

*) Apply blinding to binary field modular inversion and remove patent
pending (OPENSSL_SUN_GF2M_DIV) BN_GF2m_mod_div implementation.
[Billy Bob Brumley]

*) Deprecate ec2_mult.c and unify scalar multiplication code paths for
binary and prime elliptic curves.
[Billy Bob Brumley]

*) Remove ECDSA nonce padding: EC_POINT_mul is now responsible for
constant time fixed point multiplication.
[Billy Bob Brumley]

*) Revise elliptic curve scalar multiplication with timing attack
defenses: ec_wNAF_mul redirects to a constant time implementation
when computing fixed point and variable point multiplication (which
in OpenSSL are mostly used with secret scalars in keygen, sign,
ECDH derive operations).
[Billy Bob Brumley, Nicola Tuveri, Cesar Pereida García,
Sohaib ul Hassan]

*) Updated CONTRIBUTING
[Rich Salz]

*) Updated DRBG / RAND to request nonce and additional low entropy
randomness from the system.
[Matthias St. Pierre]

*) Updated 'openssl rehash' to use OpenSSL consistent default.
[Richard Levitte]

*) Moved the load of the ssl_conf module to libcrypto, which helps
loading engines that libssl uses before libssl is initialised.
[Matt Caswell]

*) Added EVP_PKEY_sign() and EVP_PKEY_verify() for EdDSA
[Matt Caswell]

*) Fixed X509_NAME_ENTRY_set to get multi-valued RDNs right in all cases.
[Ingo Schwarze, Rich Salz]

*) Added output of accepting IP address and port for 'openssl s_server'
[Richard Levitte]

*) Added a new API for TLSv1.3 ciphersuites:
SSL_CTX_set_ciphersuites()
SSL_set_ciphersuites()
[Matt Caswell]

*) Memory allocation failures consistenly add an error to the error
stack.
[Rich Salz]

*) Don't use OPENSSL_ENGINES and OPENSSL_CONF environment values
in libcrypto when run as setuid/setgid.
[Bernd Edlinger]

*) Load any config file by default when libssl is used.
[Matt Caswell]

*) Added new public header file <openssl/rand_drbg.h> and documentation
for the RAND_DRBG API. See manual page RAND_DRBG(7) for an overview.
[Matthias St. Pierre]

*) QNX support removed (cannot find contributors to get their approval
for the license change).
[Rich Salz]

*) TLSv1.3 replay protection for early data has been implemented. See the
SSL_read_early_data() man page for further details.
[Matt Caswell]

*) Separated TLSv1.3 ciphersuite configuration out from TLSv1.2 ciphersuite
configuration. TLSv1.3 ciphersuites are not compatible with TLSv1.2 and
below. Similarly TLSv1.2 ciphersuites are not compatible with TLSv1.3.
In order to avoid issues where legacy TLSv1.2 ciphersuite configuration
would otherwise inadvertently disable all TLSv1.3 ciphersuites the
configuration has been separated out. See the ciphers man page or the
SSL_CTX_set_ciphersuites() man page for more information.
[Matt Caswell]

*) On POSIX (BSD, Linux, ...) systems the ocsp(1) command running
in responder mode now supports the new "-multi" option, which
spawns the specified number of child processes to handle OCSP
requests. The "-timeout" option now also limits the OCSP
responder's patience to wait to receive the full client request
on a newly accepted connection. Child processes are respawned
as needed, and the CA index file is automatically reloaded
when changed. This makes it possible to run the "ocsp" responder
as a long-running service, making the OpenSSL CA somewhat more
feature-complete. In this mode, most diagnostic messages logged
after entering the event loop are logged via syslog(3) rather than
written to stderr.
[Viktor Dukhovni]

*) Added support for X448 and Ed448. Heavily based on original work by
Mike Hamburg.
[Matt Caswell]

*) Extend OSSL_STORE with capabilities to search and to narrow the set of
objects loaded. This adds the functions OSSL_STORE_expect() and
OSSL_STORE_find() as well as needed tools to construct searches and
get the search data out of them.
[Richard Levitte]

*) Support for TLSv1.3 added. Note that users upgrading from an earlier
version of OpenSSL should review their configuration settings to ensure
that they are still appropriate for TLSv1.3. For further information see:
https://wiki.openssl.org/index.php/TLS1.3
[Matt Caswell]

*) Grand redesign of the OpenSSL random generator

The default RAND method now utilizes an AES-CTR DRBG according to
NIST standard SP 800-90Ar1. The new random generator is essentially
a port of the default random generator from the OpenSSL FIPS 2.0
object module. It is a hybrid deterministic random bit generator
using an AES-CTR bit stream and which seeds and reseeds itself
automatically using trusted system entropy sources.

Some of its new features are:
o Support for multiple DRBG instances with seed chaining.
o The default RAND method makes use of a DRBG.
o There is a public and private DRBG instance.
o The DRBG instances are fork-safe.
o Keep all global DRBG instances on the secure heap if it is enabled.
o The public and private DRBG instance are per thread for lock free
operation
[Paul Dale, Benjamin Kaduk, Kurt Roeckx, Rich Salz, Matthias St. Pierre]

*) Changed Configure so it only says what it does and doesn't dump
so much data. Instead, ./configdata.pm should be used as a script
to display all sorts of configuration data.
[Richard Levitte]

*) Added processing of "make variables" to Configure.
[Richard Levitte]

*) Added SHA512/224 and SHA512/256 algorithm support.
[Paul Dale]

*) The last traces of Netware support, first removed in 1.1.0, have
now been removed.
[Rich Salz]

*) Get rid of Makefile.shared, and in the process, make the processing
of certain files (rc.obj, or the .def/.map/.opt files produced from
the ordinal files) more visible and hopefully easier to trace and
debug (or make silent).
[Richard Levitte]

*) Make it possible to have environment variable assignments as
arguments to config / Configure.
[Richard Levitte]

*) Add multi-prime RSA (RFC 8017) support.
[Paul Yang]

*) Add SM3 implemented according to GB/T 32905-2016
[ Jack Lloyd <jack.lloyd@ribose.com>,
Ronald Tse <ronald.tse@ribose.com>,
Erick Borsboom <erick.borsboom@ribose.com> ]

*) Add 'Maximum Fragment Length' TLS extension negotiation and support
as documented in RFC6066.
Based on a patch from Tomasz Moń
[Filipe Raimundo da Silva]

*) Add SM4 implemented according to GB/T 32907-2016.
[ Jack Lloyd <jack.lloyd@ribose.com>,
Ronald Tse <ronald.tse@ribose.com>,
Erick Borsboom <erick.borsboom@ribose.com> ]

*) Reimplement -newreq-nodes and ERR_error_string_n; the
original author does not agree with the license change.
[Rich Salz]

*) Add ARIA AEAD TLS support.
[Jon Spillett]

*) Some macro definitions to support VS6 have been removed. Visual
Studio 6 has not worked since 1.1.0
[Rich Salz]

*) Add ERR_clear_last_mark(), to allow callers to clear the last mark
without clearing the errors.
[Richard Levitte]

*) Add "atfork" functions. If building on a system that without
pthreads, see doc/man3/OPENSSL_fork_prepare.pod for application
requirements. The RAND facility now uses/requires this.
[Rich Salz]

*) Add SHA3.
[Andy Polyakov]

*) The UI API becomes a permanent and integral part of libcrypto, i.e.
not possible to disable entirely. However, it's still possible to
disable the console reading UI method, UI_OpenSSL() (use UI_null()
as a fallback).

To disable, configure with 'no-ui-console'. 'no-ui' is still
possible to use as an alias. Check at compile time with the
macro OPENSSL_NO_UI_CONSOLE. The macro OPENSSL_NO_UI is still
possible to check and is an alias for OPENSSL_NO_UI_CONSOLE.
[Richard Levitte]

*) Add a STORE module, which implements a uniform and URI based reader of
stores that can contain keys, certificates, CRLs and numerous other
objects. The main API is loosely based on a few stdio functions,
and includes OSSL_STORE_open, OSSL_STORE_load, OSSL_STORE_eof,
OSSL_STORE_error and OSSL_STORE_close.
The implementation uses backends called "loaders" to implement arbitrary
URI schemes. There is one built in "loader" for the 'file' scheme.
[Richard Levitte]

*) Add devcrypto engine. This has been implemented against cryptodev-linux,
then adjusted to work on FreeBSD 8.4 as well.
Enable by configuring with 'enable-devcryptoeng'. This is done by default
on BSD implementations, as cryptodev.h is assumed to exist on all of them.
[Richard Levitte]

*) Module names can prefixed with OSSL_ or OPENSSL_. This affects
util/mkerr.pl, which is adapted to allow those prefixes, leading to
error code calls like this:

OSSL_FOOerr(OSSL_FOO_F_SOMETHING, OSSL_FOO_R_WHATEVER);

With this change, we claim the namespaces OSSL and OPENSSL in a manner
that can be encoded in C. For the foreseeable future, this will only
affect new modules.
[Richard Levitte and Tim Hudson]

*) Removed BSD cryptodev engine.
[Rich Salz]

*) Add a build target 'build_all_generated', to build all generated files
and only that. This can be used to prepare everything that requires
things like perl for a system that lacks perl and then move everything
to that system and do the rest of the build there.
[Richard Levitte]

*) In the UI interface, make it possible to duplicate the user data. This
can be used by engines that need to retain the data for a longer time
than just the call where this user data is passed.
[Richard Levitte]

*) Ignore the '-named_curve auto' value for compatibility of applications
with OpenSSL 1.0.2.
[Tomas Mraz <tmraz@fedoraproject.org>]

*) Fragmented SSL/TLS alerts are no longer accepted. An alert message is 2
bytes long. In theory it is permissible in SSLv3 - TLSv1.2 to fragment such
alerts across multiple records (some of which could be empty). In practice
it make no sense to send an empty alert record, or to fragment one. TLSv1.3
prohibts this altogether and other libraries (BoringSSL, NSS) do not
support this at all. Supporting it adds significant complexity to the
record layer, and its removal is unlikely to cause inter-operability
issues.
[Matt Caswell]

*) Add the ASN.1 types INT32, UINT32, INT64, UINT64 and variants prefixed
with Z. These are meant to replace LONG and ZLONG and to be size safe.
The use of LONG and ZLONG is discouraged and scheduled for deprecation
in OpenSSL 1.2.0.
[Richard Levitte]

*) Add the 'z' and 'j' modifiers to BIO_printf() et al formatting string,
'z' is to be used for [s]size_t, and 'j' - with [u]int64_t.
[Richard Levitte, Andy Polyakov]

*) Add EC_KEY_get0_engine(), which does for EC_KEY what RSA_get0_engine()
does for RSA, etc.
[Richard Levitte]

*) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target
platform rather than 'mingw'.
[Richard Levitte]

*) The functions X509_STORE_add_cert and X509_STORE_add_crl return
success if they are asked to add an object which already exists
in the store. This change cascades to other functions which load
certificates and CRLs.
[Paul Dale]

*) x86_64 assembly pack: annotate code with DWARF CFI directives to
facilitate stack unwinding even from assembly subroutines.
[Andy Polyakov]

*) Remove VAX C specific definitions of OPENSSL_EXPORT, OPENSSL_EXTERN.
Also remove OPENSSL_GLOBAL entirely, as it became a no-op.
[Richard Levitte]

*) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c.
VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1,
which is the minimum version we support.
[Richard Levitte]

*) Certificate time validation (X509_cmp_time) enforces stricter
compliance with RFC 5280. Fractional seconds and timezone offsets
are no longer allowed.
[Emilia Käsper]

*) Add support for ARIA
[Paul Dale]

*) s_client will now send the Server Name Indication (SNI) extension by
default unless the new "-noservername" option is used. The server name is
based on the host provided to the "-connect" option unless overridden by
using "-servername".
[Matt Caswell]

*) Add support for SipHash
[Todd Short]

*) OpenSSL now fails if it receives an unrecognised record type in TLS1.0
or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to
prevent issues where no progress is being made and the peer continually
sends unrecognised record types, using up resources processing them.
[Matt Caswell]

*) 'openssl passwd' can now produce SHA256 and SHA512 based output,
using the algorithm defined in
https://www.akkadia.org/drepper/SHA-crypt.txt
[Richard Levitte]

*) Heartbeat support has been removed; the ABI is changed for now.
[Richard Levitte, Rich Salz]

*) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd.
[Emilia Käsper]

*) The RSA "null" method, which was partially supported to avoid patent
issues, has been replaced to always returns NULL.
[Rich Salz]

show more ...

Changes between 1.1.0f and 1.1.0g [2 Nov 2017]

*) bn_sqrx8x_internal carry bug on x86_64

There is a carry propagating bug in the x86_64 Montgomery squaring
procedure. No EC algorithms a

Changes between 1.1.0f and 1.1.0g [2 Nov 2017]

*) bn_sqrx8x_internal carry bug on x86_64

There is a carry propagating bug in the x86_64 Montgomery squaring
procedure. No EC algorithms are affected. Analysis suggests that attacks
against RSA and DSA as a result of this defect would be very difficult to
perform and are not believed likely. Attacks against DH are considered just
feasible (although very difficult) because most of the work necessary to
deduce information about a private key may be performed offline. The amount
of resources required for such an attack would be very significant and
likely only accessible to a limited number of attackers. An attacker would
additionally need online access to an unpatched system using the target
private key in a scenario with persistent DH parameters and a private
key that is shared between multiple clients.

This only affects processors that support the BMI1, BMI2 and ADX extensions
like Intel Broadwell (5th generation) and later or AMD Ryzen.

This issue was reported to OpenSSL by the OSS-Fuzz project.
(CVE-2017-3736)
[Andy Polyakov]

*) Malformed X.509 IPAddressFamily could cause OOB read

If an X.509 certificate has a malformed IPAddressFamily extension,
OpenSSL could do a one-byte buffer overread. The most likely result
would be an erroneous display of the certificate in text format.

This issue was reported to OpenSSL by the OSS-Fuzz project.
(CVE-2017-3735)
[Rich Salz]

*) Ignore the '-named_curve auto' value for compatibility of applications
with OpenSSL 1.0.2.
[Tomas Mraz <tmraz@fedoraproject.org>]

*) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd.
[Emilia Käsper]

Changes between 1.1.0e and 1.1.0f [25 May 2017]

*) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target
platform rather than 'mingw'.
[Richard Levitte]

*) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c.
VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1,
which is the minimum version we support.
[Richard Levitte]

Changes between 1.1.0d and 1.1.0e [16 Feb 2017]

*) Encrypt-Then-Mac renegotiation crash

During a renegotiation handshake if the Encrypt-Then-Mac extension is
negotiated where it was not in the original handshake (or vice-versa) then
this can cause OpenSSL to crash (dependant on ciphersuite). Both clients
and servers are affected.

This issue was reported to OpenSSL by Joe Orton (Red Hat).
(CVE-2017-3733)
[Matt Caswell]

Changes between 1.1.0c and 1.1.0d [26 Jan 2017]

*) Truncated packet could crash via OOB read

If one side of an SSL/TLS path is running on a 32-bit host and a specific
cipher is being used, then a truncated packet can cause that host to
perform an out-of-bounds read, usually resulting in a crash.

This issue was reported to OpenSSL by Robert Święcki of Google.
(CVE-2017-3731)
[Andy Polyakov]

*) Bad (EC)DHE parameters cause a client crash

If a malicious server supplies bad parameters for a DHE or ECDHE key
exchange then this can result in the client attempting to dereference a
NULL pointer leading to a client crash. This could be exploited in a Denial
of Service attack.

This issue was reported to OpenSSL by Guido Vranken.
(CVE-2017-3730)
[Matt Caswell]

*) BN_mod_exp may produce incorrect results on x86_64

There is a carry propagating bug in the x86_64 Montgomery squaring
procedure. No EC algorithms are affected. Analysis suggests that attacks
against RSA and DSA as a result of this defect would be very difficult to
perform and are not believed likely. Attacks against DH are considered just
feasible (although very difficult) because most of the work necessary to
deduce information about a private key may be performed offline. The amount
of resources required for such an attack would be very significant and
likely only accessible to a limited number of attackers. An attacker would
additionally need online access to an unpatched system using the target
private key in a scenario with persistent DH parameters and a private
key that is shared between multiple clients. For example this can occur by
default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very
similar to CVE-2015-3193 but must be treated as a separate problem.

This issue was reported to OpenSSL by the OSS-Fuzz project.
(CVE-2017-3732)
[Andy Polyakov]

Changes between 1.1.0b and 1.1.0c [10 Nov 2016]

*) ChaCha20/Poly1305 heap-buffer-overflow

TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to
a DoS attack by corrupting larger payloads. This can result in an OpenSSL
crash. This issue is not considered to be exploitable beyond a DoS.

This issue was reported to OpenSSL by Robert Święcki (Google Security Team)
(CVE-2016-7054)
[Richard Levitte]

*) CMS Null dereference

Applications parsing invalid CMS structures can crash with a NULL pointer
dereference. This is caused by a bug in the handling of the ASN.1 CHOICE
type in OpenSSL 1.1.0 which can result in a NULL value being passed to the
structure callback if an attempt is made to free certain invalid encodings.
Only CHOICE structures using a callback which do not handle NULL value are
affected.

This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure.
(CVE-2016-7053)
[Stephen Henson]

*) Montgomery multiplication may produce incorrect results

There is a carry propagating bug in the Broadwell-specific Montgomery
multiplication procedure that handles input lengths divisible by, but
longer than 256 bits. Analysis suggests that attacks against RSA, DSA
and DH private keys are impossible. This is because the subroutine in
question is not used in operations with the private key itself and an input
of the attacker's direct choice. Otherwise the bug can manifest itself as
transient authentication and key negotiation failures or reproducible
erroneous outcome of public-key operations with specially crafted input.
Among EC algorithms only Brainpool P-512 curves are affected and one
presumably can attack ECDH key negotiation. Impact was not analyzed in
detail, because pre-requisites for attack are considered unlikely. Namely
multiple clients have to choose the curve in question and the server has to
share the private key among them, neither of which is default behaviour.
Even then only clients that chose the curve will be affected.

This issue was publicly reported as transient failures and was not
initially recognized as a security issue. Thanks to Richard Morgan for
providing reproducible case.
(CVE-2016-7055)
[Andy Polyakov]

*) OpenSSL now fails if it receives an unrecognised record type in TLS1.0
or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to
prevent issues where no progress is being made and the peer continually
sends unrecognised record types, using up resources processing them.
[Matt Caswell]

*) Removed automatic addition of RPATH in shared libraries and executables,
as this was a remainder from OpenSSL 1.0.x and isn't needed any more.
[Richard Levitte]

Changes between 1.1.0a and 1.1.0b [26 Sep 2016]

*) Fix Use After Free for large message sizes

The patch applied to address CVE-2016-6307 resulted in an issue where if a
message larger than approx 16k is received then the underlying buffer to
store the incoming message is reallocated and moved. Unfortunately a
dangling pointer to the old location is left which results in an attempt to
write to the previously freed location. This is likely to result in a
crash, however it could potentially lead to execution of arbitrary code.

This issue only affects OpenSSL 1.1.0a.

This issue was reported to OpenSSL by Robert Święcki.
(CVE-2016-6309)
[Matt Caswell]

Changes between 1.1.0 and 1.1.0a [22 Sep 2016]

*) OCSP Status Request extension unbounded memory growth

A malicious client can send an excessively large OCSP Status Request
extension. If that client continually requests renegotiation, sending a
large OCSP Status Request extension each time, then there will be unbounded
memory growth on the server. This will eventually lead to a Denial Of
Service attack through memory exhaustion. Servers with a default
configuration are vulnerable even if they do not support OCSP. Builds using
the "no-ocsp" build time option are not affected.

This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.)
(CVE-2016-6304)
[Matt Caswell]

*) SSL_peek() hang on empty record

OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer
sends an empty record. This could be exploited by a malicious peer in a
Denial Of Service attack.

This issue was reported to OpenSSL by Alex Gaynor.
(CVE-2016-6305)
[Matt Caswell]

*) Excessive allocation of memory in tls_get_message_header() and
dtls1_preprocess_fragment()

A (D)TLS message includes 3 bytes for its length in the header for the
message. This would allow for messages up to 16Mb in length. Messages of
this length are excessive and OpenSSL includes a check to ensure that a
peer is sending reasonably sized messages in order to avoid too much memory
being consumed to service a connection. A flaw in the logic of version
1.1.0 means that memory for the message is allocated too early, prior to
the excessive message length check. Due to way memory is allocated in
OpenSSL this could mean an attacker could force up to 21Mb to be allocated
to service a connection. This could lead to a Denial of Service through
memory exhaustion. However, the excessive message length check still takes
place, and this would cause the connection to immediately fail. Assuming
that the application calls SSL_free() on the failed connection in a timely
manner then the 21Mb of allocated memory will then be immediately freed
again. Therefore the excessive memory allocation will be transitory in
nature. This then means that there is only a security impact if:

1) The application does not call SSL_free() in a timely manner in the event
that the connection fails
or
2) The application is working in a constrained environment where there is
very little free memory
or
3) The attacker initiates multiple connection attempts such that there are
multiple connections in a state where memory has been allocated for the
connection; SSL_free() has not yet been called; and there is insufficient
memory to service the multiple requests.

Except in the instance of (1) above any Denial Of Service is likely to be
transitory because as soon as the connection fails the memory is
subsequently freed again in the SSL_free() call. However there is an
increased risk during this period of application crashes due to the lack of
memory - which would then mean a more serious Denial of Service.

This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.)
(CVE-2016-6307 and CVE-2016-6308)
[Matt Caswell]

*) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler,
had to be removed. Primary reason is that vendor assembler can't
assemble our modules with -KPIC flag. As result it, assembly
support, was not even available as option. But its lack means
lack of side-channel resistant code, which is incompatible with
security by todays standards. Fortunately gcc is readily available
prepackaged option, which we firmly point at...
[Andy Polyakov]

Changes between 1.0.2h and 1.1.0 [25 Aug 2016]

*) Windows command-line tool supports UTF-8 opt-in option for arguments
and console input. Setting OPENSSL_WIN32_UTF8 environment variable
(to any value) allows Windows user to access PKCS#12 file generated
with Windows CryptoAPI and protected with non-ASCII password, as well
as files generated under UTF-8 locale on Linux also protected with
non-ASCII password.
[Andy Polyakov]

*) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites
have been disabled by default and removed from DEFAULT, just like RC4.
See the RC4 item below to re-enable both.
[Rich Salz]

*) The method for finding the storage location for the Windows RAND seed file
has changed. First we check %RANDFILE%. If that is not set then we check
the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If
all else fails we fall back to C:\.
[Matt Caswell]

*) The EVP_EncryptUpdate() function has had its return type changed from void
to int. A return of 0 indicates and error while a return of 1 indicates
success.
[Matt Caswell]

*) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and
DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch
off the constant time implementation for RSA, DSA and DH have been made
no-ops and deprecated.
[Matt Caswell]

*) Windows RAND implementation was simplified to only get entropy by
calling CryptGenRandom(). Various other RAND-related tickets
were also closed.
[Joseph Wylie Yandle, Rich Salz]

*) The stack and lhash API's were renamed to start with OPENSSL_SK_
and OPENSSL_LH_, respectively. The old names are available
with API compatibility. They new names are now completely documented.
[Rich Salz]

*) Unify TYPE_up_ref(obj) methods signature.
SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(),
X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an
int (instead of void) like all others TYPE_up_ref() methods.
So now these methods also check the return value of CRYPTO_atomic_add(),
and the validity of object reference counter.
[fdasilvayy@gmail.com]

*) With Windows Visual Studio builds, the .pdb files are installed
alongside the installed libraries and executables. For a static
library installation, ossl_static.pdb is the associate compiler
generated .pdb file to be used when linking programs.
[Richard Levitte]

*) Remove openssl.spec. Packaging files belong with the packagers.
[Richard Levitte]

*) Automatic Darwin/OSX configuration has had a refresh, it will now
recognise x86_64 architectures automatically. You can still decide
to build for a different bitness with the environment variable
KERNEL_BITS (can be 32 or 64), for example:

KERNEL_BITS=32 ./config

[Richard Levitte]

*) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0,
256 bit AES and HMAC with SHA256.
[Steve Henson]

*) Remove support for MIPS o32 ABI on IRIX (and IRIX only).
[Andy Polyakov]

*) Triple-DES ciphers have been moved from HIGH to MEDIUM.
[Rich Salz]

*) To enable users to have their own config files and build file templates,
Configure looks in the directory indicated by the environment variable
OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/
directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical
name and is used as is.
[Richard Levitte]

*) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX,
X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type
X509_CERT_FILE_CTX was removed.
[Rich Salz]

*) "shared" builds are now the default. To create only static libraries use
the "no-shared" Configure option.
[Matt Caswell]

*) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options.
All of these option have not worked for some while and are fundamental
algorithms.
[Matt Caswell]

*) Make various cleanup routines no-ops and mark them as deprecated. Most
global cleanup functions are no longer required because they are handled
via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages).
Explicitly de-initing can cause problems (e.g. where a library that uses
OpenSSL de-inits, but an application is still using it). The affected
functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(),
EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(),
RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and
COMP_zlib_cleanup().
[Matt Caswell]

*) --strict-warnings no longer enables runtime debugging options
such as REF_DEBUG. Instead, debug options are automatically
enabled with '--debug' builds.
[Andy Polyakov, Emilia Käsper]

*) Made DH and DH_METHOD opaque. The structures for managing DH objects
have been moved out of the public header files. New functions for managing
these have been added.
[Matt Caswell]

*) Made RSA and RSA_METHOD opaque. The structures for managing RSA
objects have been moved out of the public header files. New
functions for managing these have been added.
[Richard Levitte]

*) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects
have been moved out of the public header files. New functions for managing
these have been added.
[Matt Caswell]

*) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been
moved out of the public header files. New functions for managing these
have been added.
[Matt Caswell]

*) Removed no-rijndael as a config option. Rijndael is an old name for AES.
[Matt Caswell]

*) Removed the mk1mf build scripts.
[Richard Levitte]

*) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so
it is always safe to #include a header now.
[Rich Salz]

*) Removed the aged BC-32 config and all its supporting scripts
[Richard Levitte]

*) Removed support for Ultrix, Netware, and OS/2.
[Rich Salz]

*) Add support for HKDF.
[Alessandro Ghedini]

*) Add support for blake2b and blake2s
[Bill Cox]

*) Added support for "pipelining". Ciphers that have the
EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple
encryptions/decryptions simultaneously. There are currently no built-in
ciphers with this property but the expectation is that engines will be able
to offer it to significantly improve throughput. Support has been extended
into libssl so that multiple records for a single connection can be
processed in one go (for >=TLS 1.1).
[Matt Caswell]

*) Added the AFALG engine. This is an async capable engine which is able to
offload work to the Linux kernel. In this initial version it only supports
AES128-CBC. The kernel must be version 4.1.0 or greater.
[Catriona Lucey]

*) OpenSSL now uses a new threading API. It is no longer necessary to
set locking callbacks to use OpenSSL in a multi-threaded environment. There
are two supported threading models: pthreads and windows threads. It is
also possible to configure OpenSSL at compile time for "no-threads". The
old threading API should no longer be used. The functions have been
replaced with "no-op" compatibility macros.
[Alessandro Ghedini, Matt Caswell]

*) Modify behavior of ALPN to invoke callback after SNI/servername
callback, such that updates to the SSL_CTX affect ALPN.
[Todd Short]

*) Add SSL_CIPHER queries for authentication and key-exchange.
[Todd Short]

*) Changes to the DEFAULT cipherlist:
- Prefer (EC)DHE handshakes over plain RSA.
- Prefer AEAD ciphers over legacy ciphers.
- Prefer ECDSA over RSA when both certificates are available.
- Prefer TLSv1.2 ciphers/PRF.
- Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the
default cipherlist.
[Emilia Käsper]

*) Change the ECC default curve list to be this, in order: x25519,
secp256r1, secp521r1, secp384r1.
[Rich Salz]

*) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are
disabled by default. They can be re-enabled using the
enable-weak-ssl-ciphers option to Configure.
[Matt Caswell]

*) If the server has ALPN configured, but supports no protocols that the
client advertises, send a fatal "no_application_protocol" alert.
This behaviour is SHALL in RFC 7301, though it isn't universally
implemented by other servers.
[Emilia Käsper]

*) Add X25519 support.
Add ASN.1 and EVP_PKEY methods for X25519. This includes support
for public and private key encoding using the format documented in
draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports
key generation and key derivation.

TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses
X25519(29).
[Steve Henson]

*) Deprecate SRP_VBASE_get_by_user.
SRP_VBASE_get_by_user had inconsistent memory management behaviour.
In order to fix an unavoidable memory leak (CVE-2016-0798),
SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP
seed, even if the seed is configured.

Users should use SRP_VBASE_get1_by_user instead. Note that in
SRP_VBASE_get1_by_user, caller must free the returned value. Note
also that even though configuring the SRP seed attempts to hide
invalid usernames by continuing the handshake with fake
credentials, this behaviour is not constant time and no strong
guarantees are made that the handshake is indistinguishable from
that of a valid user.
[Emilia Käsper]

*) Configuration change; it's now possible to build dynamic engines
without having to build shared libraries and vice versa. This
only applies to the engines in engines/, those in crypto/engine/
will always be built into libcrypto (i.e. "static").

Building dynamic engines is enabled by default; to disable, use
the configuration option "disable-dynamic-engine".

The only requirements for building dynamic engines are the
presence of the DSO module and building with position independent
code, so they will also automatically be disabled if configuring
with "disable-dso" or "disable-pic".

The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE
are also taken away from openssl/opensslconf.h, as they are
irrelevant.
[Richard Levitte]

*) Configuration change; if there is a known flag to compile
position independent code, it will always be applied on the
libcrypto and libssl object files, and never on the application
object files. This means other libraries that use routines from
libcrypto / libssl can be made into shared libraries regardless
of how OpenSSL was configured.

If this isn't desirable, the configuration options "disable-pic"
or "no-pic" can be used to disable the use of PIC. This will
also disable building shared libraries and dynamic engines.
[Richard Levitte]

*) Removed JPAKE code. It was experimental and has no wide use.
[Rich Salz]

*) The INSTALL_PREFIX Makefile variable has been renamed to
DESTDIR. That makes for less confusion on what this variable
is for. Also, the configuration option --install_prefix is
removed.
[Richard Levitte]

*) Heartbeat for TLS has been removed and is disabled by default
for DTLS; configure with enable-heartbeats. Code that uses the
old #define's might need to be updated.
[Emilia Käsper, Rich Salz]

*) Rename REF_CHECK to REF_DEBUG.
[Rich Salz]

*) New "unified" build system

The "unified" build system is aimed to be a common system for all
platforms we support. With it comes new support for VMS.

This system builds supports building in a different directory tree
than the source tree. It produces one Makefile (for unix family
or lookalikes), or one descrip.mms (for VMS).

The source of information to make the Makefile / descrip.mms is
small files called 'build.info', holding the necessary
information for each directory with source to compile, and a
template in Configurations, like unix-Makefile.tmpl or
descrip.mms.tmpl.

With this change, the library names were also renamed on Windows
and on VMS. They now have names that are closer to the standard
on Unix, and include the major version number, and in certain
cases, the architecture they are built for. See "Notes on shared
libraries" in INSTALL.

We rely heavily on the perl module Text::Template.
[Richard Levitte]

*) Added support for auto-initialisation and de-initialisation of the library.
OpenSSL no longer requires explicit init or deinit routines to be called,
except in certain circumstances. See the OPENSSL_init_crypto() and
OPENSSL_init_ssl() man pages for further information.
[Matt Caswell]

*) The arguments to the DTLSv1_listen function have changed. Specifically the
"peer" argument is now expected to be a BIO_ADDR object.

*) Rewrite of BIO networking library. The BIO library lacked consistent
support of IPv6, and adding it required some more extensive
modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types,
which hold all types of addresses and chains of address information.
It also introduces a new API, with functions like BIO_socket,
BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept.
The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram
have been adapted accordingly.
[Richard Levitte]

*) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without
the leading 0-byte.
[Emilia Käsper]

*) CRIME protection: disable compression by default, even if OpenSSL is
compiled with zlib enabled. Applications can still enable compression
by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by
using the SSL_CONF library to configure compression.
[Emilia Käsper]

*) The signature of the session callback configured with
SSL_CTX_sess_set_get_cb was changed. The read-only input buffer
was explicitly marked as 'const unsigned char*' instead of
'unsigned char*'.
[Emilia Käsper]

*) Always DPURIFY. Remove the use of uninitialized memory in the
RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op.
[Emilia Käsper]

*) Removed many obsolete configuration items, including
DES_PTR, DES_RISC1, DES_RISC2, DES_INT
MD2_CHAR, MD2_INT, MD2_LONG
BF_PTR, BF_PTR2
IDEA_SHORT, IDEA_LONG
RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX
[Rich Salz, with advice from Andy Polyakov]

*) Many BN internals have been moved to an internal header file.
[Rich Salz with help from Andy Polyakov]

*) Configuration and writing out the results from it has changed.
Files such as Makefile include/openssl/opensslconf.h and are now
produced through general templates, such as Makefile.in and
crypto/opensslconf.h.in and some help from the perl module
Text::Template.

Also, the center of configuration information is no longer
Makefile. Instead, Configure produces a perl module in
configdata.pm which holds most of the config data (in the hash
table %config), the target data that comes from the target
configuration in one of the Configurations/*.conf files (in
%target).
[Richard Levitte]

*) To clarify their intended purposes, the Configure options
--prefix and --openssldir change their semantics, and become more
straightforward and less interdependent.

--prefix shall be used exclusively to give the location INSTALLTOP
where programs, scripts, libraries, include files and manuals are
going to be installed. The default is now /usr/local.

--openssldir shall be used exclusively to give the default
location OPENSSLDIR where certificates, private keys, CRLs are
managed. This is also where the default openssl.cnf gets
installed.
If the directory given with this option is a relative path, the
values of both the --prefix value and the --openssldir value will
be combined to become OPENSSLDIR.
The default for --openssldir is INSTALLTOP/ssl.

Anyone who uses --openssldir to specify where OpenSSL is to be
installed MUST change to use --prefix instead.
[Richard Levitte]

*) The GOST engine was out of date and therefore it has been removed. An up
to date GOST engine is now being maintained in an external repository.
See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains
support for GOST ciphersuites (these are only activated if a GOST engine
is present).
[Matt Caswell]

*) EGD is no longer supported by default; use enable-egd when
configuring.
[Ben Kaduk and Rich Salz]

*) The distribution now has Makefile.in files, which are used to
create Makefile's when Configure is run. *Configure must be run
before trying to build now.*
[Rich Salz]

*) The return value for SSL_CIPHER_description() for error conditions
has changed.
[Rich Salz]

*) Support for RFC6698/RFC7671 DANE TLSA peer authentication.

Obtaining and performing DNSSEC validation of TLSA records is
the application's responsibility. The application provides
the TLSA records of its choice to OpenSSL, and these are then
used to authenticate the peer.

The TLSA records need not even come from DNS. They can, for
example, be used to implement local end-entity certificate or
trust-anchor "pinning", where the "pin" data takes the form
of TLSA records, which can augment or replace verification
based on the usual WebPKI public certification authorities.
[Viktor Dukhovni]

*) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL
continues to support deprecated interfaces in default builds.
However, applications are strongly advised to compile their
source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides
the declarations of all interfaces deprecated in 0.9.8, 1.0.0
or the 1.1.0 releases.

In environments in which all applications have been ported to
not use any deprecated interfaces OpenSSL's Configure script
should be used with the --api=1.1.0 option to entirely remove
support for the deprecated features from the library and
unconditionally disable them in the installed headers.
Essentially the same effect can be achieved with the "no-deprecated"
argument to Configure, except that this will always restrict
the build to just the latest API, rather than a fixed API
version.

As applications are ported to future revisions of the API,
they should update their compile-time OPENSSL_API_COMPAT define
accordingly, but in most cases should be able to continue to
compile with later releases.

The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are
0x10000000L and 0x00908000L, respectively. However those
versions did not support the OPENSSL_API_COMPAT feature, and
so applications are not typically tested for explicit support
of just the undeprecated features of either release.
[Viktor Dukhovni]

*) Add support for setting the minimum and maximum supported protocol.
It can bet set via the SSL_set_min_proto_version() and
SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and
MaxProtcol. It's recommended to use the new APIs to disable
protocols instead of disabling individual protocols using
SSL_set_options() or SSL_CONF's Protocol. This change also
removes support for disabling TLS 1.2 in the OpenSSL TLS
client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT.
[Kurt Roeckx]

*) Support for ChaCha20 and Poly1305 added to libcrypto and libssl.
[Andy Polyakov]

*) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD
and integrates ECDSA and ECDH functionality into EC. Implementations can
now redirect key generation and no longer need to convert to or from
ECDSA_SIG format.

Note: the ecdsa.h and ecdh.h headers are now no longer needed and just
include the ec.h header file instead.
[Steve Henson]

*) Remove support for all 40 and 56 bit ciphers. This includes all the export
ciphers who are no longer supported and drops support the ephemeral RSA key
exchange. The LOW ciphers currently doesn't have any ciphers in it.
[Kurt Roeckx]

*) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX
opaque. For HMAC_CTX, the following constructors and destructors
were added:

HMAC_CTX *HMAC_CTX_new(void);
void HMAC_CTX_free(HMAC_CTX *ctx);

For EVP_MD and EVP_CIPHER, complete APIs to create, fill and
destroy such methods has been added. See EVP_MD_meth_new(3) and
EVP_CIPHER_meth_new(3) for documentation.

Additional changes:
1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and
HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and
EVP_MD_CTX_reset() should be called instead to reinitialise
an already created structure.
2) For consistency with the majority of our object creators and
destructors, EVP_MD_CTX_(create|destroy) were renamed to
EVP_MD_CTX_(new|free). The old names are retained as macros
for deprecated builds.
[Richard Levitte]

*) Added ASYNC support. Libcrypto now includes the async sub-library to enable
cryptographic operations to be performed asynchronously as long as an
asynchronous capable engine is used. See the ASYNC_start_job() man page for
further details. Libssl has also had this capability integrated with the
introduction of the new mode SSL_MODE_ASYNC and associated error
SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man
pages. This work was developed in partnership with Intel Corp.
[Matt Caswell]

*) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is
always enabled now. If you want to disable the support you should
exclude it using the list of supported ciphers. This also means that the
"-no_ecdhe" option has been removed from s_server.
[Kurt Roeckx]

*) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls
SSL_{CTX_}set1_curves() which can set a list.
[Kurt Roeckx]

*) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the
curve you want to support using SSL_{CTX_}set1_curves().
[Kurt Roeckx]

*) State machine rewrite. The state machine code has been significantly
refactored in order to remove much duplication of code and solve issues
with the old code (see ssl/statem/README for further details). This change
does have some associated API changes. Notably the SSL_state() function
has been removed and replaced by SSL_get_state which now returns an
"OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed
altogether. The previous handshake states defined in ssl.h and ssl3.h have
also been removed.
[Matt Caswell]

*) All instances of the string "ssleay" in the public API were replaced
with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's)
Some error codes related to internal RSA_eay API's were renamed.
[Rich Salz]

*) The demo files in crypto/threads were moved to demo/threads.
[Rich Salz]

*) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp,
sureware and ubsec.
[Matt Caswell, Rich Salz]

*) New ASN.1 embed macro.

New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the
structure is not allocated: it is part of the parent. That is instead of

FOO *x;

it must be:

FOO x;

This reduces memory fragmentation and make it impossible to accidentally
set a mandatory field to NULL.

This currently only works for some fields specifically a SEQUENCE, CHOICE,
or ASN1_STRING type which is part of a parent SEQUENCE. Since it is
equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or
SEQUENCE OF.
[Steve Henson]

*) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled.
[Emilia Käsper]

*) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although
in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also
an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add
DES and RC4 ciphersuites.
[Matt Caswell]

*) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs.
This changes the decoding behaviour for some invalid messages,
though the change is mostly in the more lenient direction, and
legacy behaviour is preserved as much as possible.
[Emilia Käsper]

*) Fix no-stdio build.
[ David Woodhouse <David.Woodhouse@intel.com> and also
Ivan Nestlerode <ivan.nestlerode@sonos.com> ]

*) New testing framework
The testing framework has been largely rewritten and is now using
perl and the perl modules Test::Harness and an extended variant of
Test::More called OpenSSL::Test to do its work. All test scripts in
test/ have been rewritten into test recipes, and all direct calls to
executables in test/Makefile have become individual recipes using the
simplified testing OpenSSL::Test::Simple.

For documentation on our testing modules, do:

perldoc test/testlib/OpenSSL/Test/Simple.pm
perldoc test/testlib/OpenSSL/Test.pm

[Richard Levitte]

*) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT
are used; the latter aborts on memory leaks (usually checked on exit).
Some undocumented "set malloc, etc., hooks" functions were removed
and others were changed. All are now documented.
[Rich Salz]

*) In DSA_generate_parameters_ex, if the provided seed is too short,
return an error
[Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>]

*) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites
from RFC4279, RFC4785, RFC5487, RFC5489.

Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the
original RSA_PSK patch.
[Steve Henson]

*) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay
era flag was never set throughout the codebase (only read). Also removed
SSL3_FLAGS_POP_BUFFER which was only used if
SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set.
[Matt Caswell]

*) Changed the default name options in the "ca", "crl", "req" and "x509"
to be "oneline" instead of "compat".
[Richard Levitte]

*) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're
not aware of clients that still exhibit this bug, and the workaround
hasn't been working properly for a while.
[Emilia Käsper]

*) The return type of BIO_number_read() and BIO_number_written() as well as
the corresponding num_read and num_write members in the BIO structure has
changed from unsigned long to uint64_t. On platforms where an unsigned
long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is
transferred.
[Matt Caswell]

*) Given the pervasive nature of TLS extensions it is inadvisable to run
OpenSSL without support for them. It also means that maintaining
the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably
not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed.
[Matt Caswell]

*) Removed support for the two export grade static DH ciphersuites
EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites
were newly added (along with a number of other static DH ciphersuites) to
1.0.2. However the two export ones have *never* worked since they were
introduced. It seems strange in any case to be adding new export
ciphersuites, and given "logjam" it also does not seem correct to fix them.
[Matt Caswell]

*) Version negotiation has been rewritten. In particular SSLv23_method(),
SSLv23_client_method() and SSLv23_server_method() have been deprecated,
and turned into macros which simply call the new preferred function names
TLS_method(), TLS_client_method() and TLS_server_method(). All new code
should use the new names instead. Also as part of this change the ssl23.h
header file has been removed.
[Matt Caswell]

*) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This
code and the associated standard is no longer considered fit-for-purpose.
[Matt Caswell]

*) RT2547 was closed. When generating a private key, try to make the
output file readable only by the owner. This behavior change might
be noticeable when interacting with other software.

*) Documented all exdata functions. Added CRYPTO_free_ex_index.
Added a test.
[Rich Salz]

*) Added HTTP GET support to the ocsp command.
[Rich Salz]

*) Changed default digest for the dgst and enc commands from MD5 to
sha256
[Rich Salz]

*) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead.
[Matt Caswell]

*) Added support for TLS extended master secret from
draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an
initial patch which was a great help during development.
[Steve Henson]

*) All libssl internal structures have been removed from the public header
files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is
now redundant). Users should not attempt to access internal structures
directly. Instead they should use the provided API functions.
[Matt Caswell]

*) config has been changed so that by default OPENSSL_NO_DEPRECATED is used.
Access to deprecated functions can be re-enabled by running config with
"enable-deprecated". In addition applications wishing to use deprecated
functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour
will, by default, disable some transitive includes that previously existed
in the header files (e.g. ec.h will no longer, by default, include bn.h)
[Matt Caswell]

*) Added support for OCB mode. OpenSSL has been granted a patent license
compatible with the OpenSSL license for use of OCB. Details are available
at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support
for OCB can be removed by calling config with no-ocb.
[Matt Caswell]

*) SSLv2 support has been removed. It still supports receiving a SSLv2
compatible client hello.
[Kurt Roeckx]

*) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz],
done while fixing the error code for the key-too-small case.
[Annie Yousar <a.yousar@informatik.hu-berlin.de>]

*) CA.sh has been removed; use CA.pl instead.
[Rich Salz]

*) Removed old DES API.
[Rich Salz]

*) Remove various unsupported platforms:
Sony NEWS4
BEOS and BEOS_R5
NeXT
SUNOS
MPE/iX
Sinix/ReliantUNIX RM400
DGUX
NCR
Tandem
Cray
16-bit platforms such as WIN16
[Rich Salz]

*) Clean up OPENSSL_NO_xxx #define's
Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF
Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx
OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC
OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160
OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO
Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY
OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP
OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK
OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY
Remove MS_STATIC; it's a relic from platforms <32 bits.
[Rich Salz]

*) Cleaned up dead code
Remove all but one '#ifdef undef' which is to be looked at.
[Rich Salz]

*) Clean up calling of xxx_free routines.
Just like free(), fix most of the xxx_free routines to accept
NULL. Remove the non-null checks from callers. Save much code.
[Rich Salz]

*) Add secure heap for storage of private keys (when possible).
Add BIO_s_secmem(), CBIGNUM, etc.
Contributed by Akamai Technologies under our Corporate CLA.
[Rich Salz]

*) Experimental support for a new, fast, unbiased prime candidate generator,
bn_probable_prime_dh_coprime(). Not currently used by any prime generator.
[Felix Laurie von Massenbach <felix@erbridge.co.uk>]

*) New output format NSS in the sess_id command line tool. This allows
exporting the session id and the master key in NSS keylog format.
[Martin Kaiser <martin@kaiser.cx>]

*) Harmonize version and its documentation. -f flag is used to display
compilation flags.
[mancha <mancha1@zoho.com>]

*) Fix eckey_priv_encode so it immediately returns an error upon a failure
in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue.
[mancha <mancha1@zoho.com>]

*) Fix some double frees. These are not thought to be exploitable.
[mancha <mancha1@zoho.com>]

*) A missing bounds check in the handling of the TLS heartbeat extension
can be used to reveal up to 64k of memory to a connected client or
server.

Thanks for Neel Mehta of Google Security for discovering this bug and to
Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for
preparing the fix (CVE-2014-0160)
[Adam Langley, Bodo Moeller]

*) Fix for the attack described in the paper "Recovering OpenSSL
ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack"
by Yuval Yarom and Naomi Benger. Details can be obtained from:
http://eprint.iacr.org/2014/140

Thanks to Yuval Yarom and Naomi Benger for discovering this
flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076)
[Yuval Yarom and Naomi Benger]

*) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file():
this fixes a limitation in previous versions of OpenSSL.
[Steve Henson]

*) Experimental encrypt-then-mac support.

Experimental support for encrypt then mac from
draft-gutmann-tls-encrypt-then-mac-02.txt

To enable it set the appropriate extension number (0x42 for the test
server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42

For non-compliant peers (i.e. just about everything) this should have no
effect.

WARNING: EXPERIMENTAL, SUBJECT TO CHANGE.

[Steve Henson]

*) Add EVP support for key wrapping algorithms, to avoid problems with
existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in
the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap
algorithms and include tests cases.
[Steve Henson]

*) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for
enveloped data.
[Steve Henson]

*) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest,
MGF1 digest and OAEP label.
[Steve Henson]

*) Make openssl verify return errors.
[Chris Palmer <palmer@google.com> and Ben Laurie]

*) New function ASN1_TIME_diff to calculate the difference between two
ASN1_TIME structures or one structure and the current time.
[Steve Henson]

*) Update fips_test_suite to support multiple command line options. New
test to induce all self test errors in sequence and check expected
failures.
[Steve Henson]

*) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and
sign or verify all in one operation.
[Steve Henson]

*) Add fips_algvs: a multicall fips utility incorporating all the algorithm
test programs and fips_test_suite. Includes functionality to parse
the minimal script output of fipsalgest.pl directly.
[Steve Henson]

*) Add authorisation parameter to FIPS_module_mode_set().
[Steve Henson]

*) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves.
[Steve Henson]

*) Use separate DRBG fields for internal and external flags. New function
FIPS_drbg_health_check() to perform on demand health checking. Add
generation tests to fips_test_suite with reduced health check interval to
demonstrate periodic health checking. Add "nodh" option to
fips_test_suite to skip very slow DH test.
[Steve Henson]

*) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers
based on NID.
[Steve Henson]

*) More extensive health check for DRBG checking many more failure modes.
New function FIPS_selftest_drbg_all() to handle every possible DRBG
combination: call this in fips_test_suite.
[Steve Henson]

*) Add support for canonical generation of DSA parameter 'g'. See
FIPS 186-3 A.2.3.

*) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and
POST to handle HMAC cases.
[Steve Henson]

*) Add functions FIPS_module_version() and FIPS_module_version_text()
to return numerical and string versions of the FIPS module number.
[Steve Henson]

*) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and
FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented
outside the validated module in the FIPS capable OpenSSL.
[Steve Henson]

*) Minor change to DRBG entropy callback semantics. In some cases
there is no multiple of the block length between min_len and
max_len. Allow the callback to return more than max_len bytes
of entropy but discard any extra: it is the callback's responsibility
to ensure that the extra data discarded does not impact the
requested amount of entropy.
[Steve Henson]

*) Add PRNG security strength checks to RSA, DSA and ECDSA using
information in FIPS186-3, SP800-57 and SP800-131A.
[Steve Henson]

*) CCM support via EVP. Interface is very similar to GCM case except we
must supply all data in one chunk (i.e. no update, final) and the
message length must be supplied if AAD is used. Add algorithm test
support.
[Steve Henson]

*) Initial version of POST overhaul. Add POST callback to allow the status
of POST to be monitored and/or failures induced. Modify fips_test_suite
to use callback. Always run all selftests even if one fails.
[Steve Henson]

*) XTS support including algorithm test driver in the fips_gcmtest program.
Note: this does increase the maximum key length from 32 to 64 bytes but
there should be no binary compatibility issues as existing applications
will never use XTS mode.
[Steve Henson]

*) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies
to OpenSSL RAND code and replace with a tiny FIPS RAND API which also
performs algorithm blocking for unapproved PRNG types. Also do not
set PRNG type in FIPS_mode_set(): leave this to the application.
Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with
the standard OpenSSL PRNG: set additional data to a date time vector.
[Steve Henson]

*) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*.
This shouldn't present any incompatibility problems because applications
shouldn't be using these directly and any that are will need to rethink
anyway as the X9.31 PRNG is now deprecated by FIPS 140-2
[Steve Henson]

*) Extensive self tests and health checking required by SP800-90 DRBG.
Remove strength parameter from FIPS_drbg_instantiate and always
instantiate at maximum supported strength.
[Steve Henson]

*) Add ECDH code to fips module and fips_ecdhvs for primitives only testing.
[Steve Henson]

*) New algorithm test program fips_dhvs to handle DH primitives only testing.
[Steve Henson]

*) New function DH_compute_key_padded() to compute a DH key and pad with
leading zeroes if needed: this complies with SP800-56A et al.
[Steve Henson]

*) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by
anything, incomplete, subject to change and largely untested at present.
[Steve Henson]

*) Modify fipscanisteronly build option to only build the necessary object
files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile.
[Steve Henson]

*) Add experimental option FIPSSYMS to give all symbols in
fipscanister.o and FIPS or fips prefix. This will avoid
conflicts with future versions of OpenSSL. Add perl script
util/fipsas.pl to preprocess assembly language source files
and rename any affected symbols.
[Steve Henson]

*) Add selftest checks and algorithm block of non-fips algorithms in
FIPS mode. Remove DES2 from selftests.
[Steve Henson]

*) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just
return internal method without any ENGINE dependencies. Add new
tiny fips sign and verify functions.
[Steve Henson]

*) New build option no-ec2m to disable characteristic 2 code.
[Steve Henson]

*) New build option "fipscanisteronly". This only builds fipscanister.o
and (currently) associated fips utilities. Uses the file Makefile.fips
instead of Makefile.org as the prototype.
[Steve Henson]

*) Add some FIPS mode restrictions to GCM. Add internal IV generator.
Update fips_gcmtest to use IV generator.
[Steve Henson]

*) Initial, experimental EVP support for AES-GCM. AAD can be input by
setting output buffer to NULL. The *Final function must be
called although it will not retrieve any additional data. The tag
can be set or retrieved with a ctrl. The IV length is by default 12
bytes (96 bits) but can be set to an alternative value. If the IV
length exceeds the maximum IV length (currently 16 bytes) it cannot be
set before the key.
[Steve Henson]

*) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the
underlying do_cipher function handles all cipher semantics itself
including padding and finalisation. This is useful if (for example)
an ENGINE cipher handles block padding itself. The behaviour of
do_cipher is subtly changed if this flag is set: the return value
is the number of characters written to the output buffer (zero is
no longer an error code) or a negative error code. Also if the
input buffer is NULL and length 0 finalisation should be performed.
[Steve Henson]

*) If a candidate issuer certificate is already part of the constructed
path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case.
[Steve Henson]

*) Improve forward-security support: add functions

void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure))
void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure))

for use by SSL/TLS servers; the callback function will be called whenever a
new session is created, and gets to decide whether the session may be
cached to make it resumable (return 0) or not (return 1). (As by the
SSL/TLS protocol specifications, the session_id sent by the server will be
empty to indicate that the session is not resumable; also, the server will
not generate RFC 4507 (RFC 5077) session tickets.)

A simple reasonable callback implementation is to return is_forward_secure.
This parameter will be set to 1 or 0 depending on the ciphersuite selected
by the SSL/TLS server library, indicating whether it can provide forward
security.
[Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]

*) New -verify_name option in command line utilities to set verification
parameters by name.
[Steve Henson]

*) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE.
Add CMAC pkey methods.
[Steve Henson]

*) Experimental renegotiation in s_server -www mode. If the client
browses /reneg connection is renegotiated. If /renegcert it is
renegotiated requesting a certificate.
[Steve Henson]

*) Add an "external" session cache for debugging purposes to s_server. This
should help trace issues which normally are only apparent in deployed
multi-process servers.
[Steve Henson]

*) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where
return value is ignored. NB. The functions RAND_add(), RAND_seed(),
BIO_set_cipher() and some obscure PEM functions were changed so they
can now return an error. The RAND changes required a change to the
RAND_METHOD structure.
[Steve Henson]

*) New macro __owur for "OpenSSL Warn Unused Result". This makes use of
a gcc attribute to warn if the result of a function is ignored. This
is enable if DEBUG_UNUSED is set. Add to several functions in evp.h
whose return value is often ignored.
[Steve Henson]

*) New -noct, -requestct, -requirect and -ctlogfile options for s_client.
These allow SCTs (signed certificate timestamps) to be requested and
validated when establishing a connection.
[Rob Percival <robpercival@google.com>]

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