1 /* crypto/evp/e_des3.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59 #include <stdio.h> 60 #include "cryptlib.h" 61 #ifndef OPENSSL_NO_DES 62 # include <openssl/evp.h> 63 # include <openssl/objects.h> 64 # include "evp_locl.h" 65 # include <openssl/des.h> 66 # include <openssl/rand.h> 67 68 /* Block use of implementations in FIPS mode */ 69 # undef EVP_CIPH_FLAG_FIPS 70 # define EVP_CIPH_FLAG_FIPS 0 71 72 typedef struct { 73 union { 74 double align; 75 DES_key_schedule ks[3]; 76 } ks; 77 union { 78 void (*cbc) (const void *, void *, size_t, 79 const DES_key_schedule *, unsigned char *); 80 } stream; 81 } DES_EDE_KEY; 82 # define ks1 ks.ks[0] 83 # define ks2 ks.ks[1] 84 # define ks3 ks.ks[2] 85 86 # if defined(AES_ASM) && (defined(__sparc) || defined(__sparc__)) 87 /* ---------^^^ this is not a typo, just a way to detect that 88 * assembler support was in general requested... */ 89 # include "sparc_arch.h" 90 91 extern unsigned int OPENSSL_sparcv9cap_P[]; 92 93 # define SPARC_DES_CAPABLE (OPENSSL_sparcv9cap_P[1] & CFR_DES) 94 95 void des_t4_key_expand(const void *key, DES_key_schedule *ks); 96 void des_t4_ede3_cbc_encrypt(const void *inp, void *out, size_t len, 97 const DES_key_schedule ks[3], unsigned char iv[8]); 98 void des_t4_ede3_cbc_decrypt(const void *inp, void *out, size_t len, 99 const DES_key_schedule ks[3], unsigned char iv[8]); 100 # endif 101 102 static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 103 const unsigned char *iv, int enc); 104 105 static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 106 const unsigned char *iv, int enc); 107 108 static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr); 109 110 # define data(ctx) ((DES_EDE_KEY *)(ctx)->cipher_data) 111 112 /* 113 * Because of various casts and different args can't use 114 * IMPLEMENT_BLOCK_CIPHER 115 */ 116 117 static int des_ede_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 118 const unsigned char *in, size_t inl) 119 { 120 BLOCK_CIPHER_ecb_loop() 121 DES_ecb3_encrypt((const_DES_cblock *)(in + i), 122 (DES_cblock *)(out + i), 123 &data(ctx)->ks1, &data(ctx)->ks2, 124 &data(ctx)->ks3, ctx->encrypt); 125 return 1; 126 } 127 128 static int des_ede_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 129 const unsigned char *in, size_t inl) 130 { 131 while (inl >= EVP_MAXCHUNK) { 132 DES_ede3_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK, 133 &data(ctx)->ks1, &data(ctx)->ks2, 134 &data(ctx)->ks3, (DES_cblock *)ctx->iv, 135 &ctx->num); 136 inl -= EVP_MAXCHUNK; 137 in += EVP_MAXCHUNK; 138 out += EVP_MAXCHUNK; 139 } 140 if (inl) 141 DES_ede3_ofb64_encrypt(in, out, (long)inl, 142 &data(ctx)->ks1, &data(ctx)->ks2, 143 &data(ctx)->ks3, (DES_cblock *)ctx->iv, 144 &ctx->num); 145 146 return 1; 147 } 148 149 static int des_ede_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 150 const unsigned char *in, size_t inl) 151 { 152 DES_EDE_KEY *dat = data(ctx); 153 154 # ifdef KSSL_DEBUG 155 { 156 int i; 157 fprintf(stderr, "des_ede_cbc_cipher(ctx=%p, buflen=%d)\n", ctx, 158 ctx->buf_len); 159 fprintf(stderr, "\t iv= "); 160 for (i = 0; i < 8; i++) 161 fprintf(stderr, "%02X", ctx->iv[i]); 162 fprintf(stderr, "\n"); 163 } 164 # endif /* KSSL_DEBUG */ 165 if (dat->stream.cbc) { 166 (*dat->stream.cbc) (in, out, inl, dat->ks.ks, ctx->iv); 167 return 1; 168 } 169 170 while (inl >= EVP_MAXCHUNK) { 171 DES_ede3_cbc_encrypt(in, out, (long)EVP_MAXCHUNK, 172 &dat->ks1, &dat->ks2, &dat->ks3, 173 (DES_cblock *)ctx->iv, ctx->encrypt); 174 inl -= EVP_MAXCHUNK; 175 in += EVP_MAXCHUNK; 176 out += EVP_MAXCHUNK; 177 } 178 if (inl) 179 DES_ede3_cbc_encrypt(in, out, (long)inl, 180 &dat->ks1, &dat->ks2, &dat->ks3, 181 (DES_cblock *)ctx->iv, ctx->encrypt); 182 return 1; 183 } 184 185 static int des_ede_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 186 const unsigned char *in, size_t inl) 187 { 188 while (inl >= EVP_MAXCHUNK) { 189 DES_ede3_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK, 190 &data(ctx)->ks1, &data(ctx)->ks2, 191 &data(ctx)->ks3, (DES_cblock *)ctx->iv, 192 &ctx->num, ctx->encrypt); 193 inl -= EVP_MAXCHUNK; 194 in += EVP_MAXCHUNK; 195 out += EVP_MAXCHUNK; 196 } 197 if (inl) 198 DES_ede3_cfb64_encrypt(in, out, (long)inl, 199 &data(ctx)->ks1, &data(ctx)->ks2, 200 &data(ctx)->ks3, (DES_cblock *)ctx->iv, 201 &ctx->num, ctx->encrypt); 202 return 1; 203 } 204 205 /* 206 * Although we have a CFB-r implementation for 3-DES, it doesn't pack the 207 * right way, so wrap it here 208 */ 209 static int des_ede3_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 210 const unsigned char *in, size_t inl) 211 { 212 size_t n; 213 unsigned char c[1], d[1]; 214 215 if (!EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) 216 inl *= 8; 217 for (n = 0; n < inl; ++n) { 218 c[0] = (in[n / 8] & (1 << (7 - n % 8))) ? 0x80 : 0; 219 DES_ede3_cfb_encrypt(c, d, 1, 1, 220 &data(ctx)->ks1, &data(ctx)->ks2, 221 &data(ctx)->ks3, (DES_cblock *)ctx->iv, 222 ctx->encrypt); 223 out[n / 8] = (out[n / 8] & ~(0x80 >> (unsigned int)(n % 8))) 224 | ((d[0] & 0x80) >> (unsigned int)(n % 8)); 225 } 226 227 return 1; 228 } 229 230 static int des_ede3_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 231 const unsigned char *in, size_t inl) 232 { 233 while (inl >= EVP_MAXCHUNK) { 234 DES_ede3_cfb_encrypt(in, out, 8, (long)EVP_MAXCHUNK, 235 &data(ctx)->ks1, &data(ctx)->ks2, 236 &data(ctx)->ks3, (DES_cblock *)ctx->iv, 237 ctx->encrypt); 238 inl -= EVP_MAXCHUNK; 239 in += EVP_MAXCHUNK; 240 out += EVP_MAXCHUNK; 241 } 242 if (inl) 243 DES_ede3_cfb_encrypt(in, out, 8, (long)inl, 244 &data(ctx)->ks1, &data(ctx)->ks2, 245 &data(ctx)->ks3, (DES_cblock *)ctx->iv, 246 ctx->encrypt); 247 return 1; 248 } 249 250 BLOCK_CIPHER_defs(des_ede, DES_EDE_KEY, NID_des_ede, 8, 16, 8, 64, 251 EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_DEFAULT_ASN1, 252 des_ede_init_key, NULL, NULL, NULL, des3_ctrl) 253 # define des_ede3_cfb64_cipher des_ede_cfb64_cipher 254 # define des_ede3_ofb_cipher des_ede_ofb_cipher 255 # define des_ede3_cbc_cipher des_ede_cbc_cipher 256 # define des_ede3_ecb_cipher des_ede_ecb_cipher 257 BLOCK_CIPHER_defs(des_ede3, DES_EDE_KEY, NID_des_ede3, 8, 24, 8, 64, 258 EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_FIPS | 259 EVP_CIPH_FLAG_DEFAULT_ASN1, des_ede3_init_key, NULL, NULL, NULL, 260 des3_ctrl) 261 262 BLOCK_CIPHER_def_cfb(des_ede3, DES_EDE_KEY, NID_des_ede3, 24, 8, 1, 263 EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_FIPS | 264 EVP_CIPH_FLAG_DEFAULT_ASN1, des_ede3_init_key, NULL, NULL, 265 NULL, des3_ctrl) 266 267 BLOCK_CIPHER_def_cfb(des_ede3, DES_EDE_KEY, NID_des_ede3, 24, 8, 8, 268 EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_FIPS | 269 EVP_CIPH_FLAG_DEFAULT_ASN1, des_ede3_init_key, NULL, NULL, 270 NULL, des3_ctrl) 271 272 static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 273 const unsigned char *iv, int enc) 274 { 275 DES_cblock *deskey = (DES_cblock *)key; 276 DES_EDE_KEY *dat = data(ctx); 277 278 dat->stream.cbc = NULL; 279 # if defined(SPARC_DES_CAPABLE) 280 if (SPARC_DES_CAPABLE) { 281 int mode = ctx->cipher->flags & EVP_CIPH_MODE; 282 283 if (mode == EVP_CIPH_CBC_MODE) { 284 des_t4_key_expand(&deskey[0], &dat->ks1); 285 des_t4_key_expand(&deskey[1], &dat->ks2); 286 memcpy(&dat->ks3, &dat->ks1, sizeof(dat->ks1)); 287 dat->stream.cbc = enc ? des_t4_ede3_cbc_encrypt : 288 des_t4_ede3_cbc_decrypt; 289 return 1; 290 } 291 } 292 # endif 293 # ifdef EVP_CHECK_DES_KEY 294 if (DES_set_key_checked(&deskey[0], &dat->ks1) 295 || DES_set_key_checked(&deskey[1], &dat->ks2)) 296 return 0; 297 # else 298 DES_set_key_unchecked(&deskey[0], &dat->ks1); 299 DES_set_key_unchecked(&deskey[1], &dat->ks2); 300 # endif 301 memcpy(&dat->ks3, &dat->ks1, sizeof(dat->ks1)); 302 return 1; 303 } 304 305 static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 306 const unsigned char *iv, int enc) 307 { 308 DES_cblock *deskey = (DES_cblock *)key; 309 DES_EDE_KEY *dat = data(ctx); 310 311 # ifdef KSSL_DEBUG 312 { 313 int i; 314 fprintf(stderr, "des_ede3_init_key(ctx=%p)\n", ctx); 315 fprintf(stderr, "\tKEY= "); 316 for (i = 0; i < 24; i++) 317 fprintf(stderr, "%02X", key[i]); 318 fprintf(stderr, "\n"); 319 if (iv) { 320 fprintf(stderr, "\t IV= "); 321 for (i = 0; i < 8; i++) 322 fprintf(stderr, "%02X", iv[i]); 323 fprintf(stderr, "\n"); 324 } 325 } 326 # endif /* KSSL_DEBUG */ 327 328 dat->stream.cbc = NULL; 329 # if defined(SPARC_DES_CAPABLE) 330 if (SPARC_DES_CAPABLE) { 331 int mode = ctx->cipher->flags & EVP_CIPH_MODE; 332 333 if (mode == EVP_CIPH_CBC_MODE) { 334 des_t4_key_expand(&deskey[0], &dat->ks1); 335 des_t4_key_expand(&deskey[1], &dat->ks2); 336 des_t4_key_expand(&deskey[2], &dat->ks3); 337 dat->stream.cbc = enc ? des_t4_ede3_cbc_encrypt : 338 des_t4_ede3_cbc_decrypt; 339 return 1; 340 } 341 } 342 # endif 343 # ifdef EVP_CHECK_DES_KEY 344 if (DES_set_key_checked(&deskey[0], &dat->ks1) 345 || DES_set_key_checked(&deskey[1], &dat->ks2) 346 || DES_set_key_checked(&deskey[2], &dat->ks3)) 347 return 0; 348 # else 349 DES_set_key_unchecked(&deskey[0], &dat->ks1); 350 DES_set_key_unchecked(&deskey[1], &dat->ks2); 351 DES_set_key_unchecked(&deskey[2], &dat->ks3); 352 # endif 353 return 1; 354 } 355 356 static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) 357 { 358 359 DES_cblock *deskey = ptr; 360 361 switch (type) { 362 case EVP_CTRL_RAND_KEY: 363 if (RAND_bytes(ptr, c->key_len) <= 0) 364 return 0; 365 DES_set_odd_parity(deskey); 366 if (c->key_len >= 16) 367 DES_set_odd_parity(deskey + 1); 368 if (c->key_len >= 24) 369 DES_set_odd_parity(deskey + 2); 370 return 1; 371 372 default: 373 return -1; 374 } 375 } 376 377 const EVP_CIPHER *EVP_des_ede(void) 378 { 379 return &des_ede_ecb; 380 } 381 382 const EVP_CIPHER *EVP_des_ede3(void) 383 { 384 return &des_ede3_ecb; 385 } 386 387 # ifndef OPENSSL_NO_SHA 388 389 # include <openssl/sha.h> 390 391 static const unsigned char wrap_iv[8] = 392 { 0x4a, 0xdd, 0xa2, 0x2c, 0x79, 0xe8, 0x21, 0x05 }; 393 394 static int des_ede3_unwrap(EVP_CIPHER_CTX *ctx, unsigned char *out, 395 const unsigned char *in, size_t inl) 396 { 397 unsigned char icv[8], iv[8], sha1tmp[SHA_DIGEST_LENGTH]; 398 int rv = -1; 399 if (inl < 24) 400 return -1; 401 if (out == NULL) 402 return inl - 16; 403 memcpy(ctx->iv, wrap_iv, 8); 404 /* Decrypt first block which will end up as icv */ 405 des_ede_cbc_cipher(ctx, icv, in, 8); 406 /* Decrypt central blocks */ 407 /* 408 * If decrypting in place move whole output along a block so the next 409 * des_ede_cbc_cipher is in place. 410 */ 411 if (out == in) { 412 memmove(out, out + 8, inl - 8); 413 in -= 8; 414 } 415 des_ede_cbc_cipher(ctx, out, in + 8, inl - 16); 416 /* Decrypt final block which will be IV */ 417 des_ede_cbc_cipher(ctx, iv, in + inl - 8, 8); 418 /* Reverse order of everything */ 419 BUF_reverse(icv, NULL, 8); 420 BUF_reverse(out, NULL, inl - 16); 421 BUF_reverse(ctx->iv, iv, 8); 422 /* Decrypt again using new IV */ 423 des_ede_cbc_cipher(ctx, out, out, inl - 16); 424 des_ede_cbc_cipher(ctx, icv, icv, 8); 425 /* Work out SHA1 hash of first portion */ 426 SHA1(out, inl - 16, sha1tmp); 427 428 if (!CRYPTO_memcmp(sha1tmp, icv, 8)) 429 rv = inl - 16; 430 OPENSSL_cleanse(icv, 8); 431 OPENSSL_cleanse(sha1tmp, SHA_DIGEST_LENGTH); 432 OPENSSL_cleanse(iv, 8); 433 OPENSSL_cleanse(ctx->iv, 8); 434 if (rv == -1) 435 OPENSSL_cleanse(out, inl - 16); 436 437 return rv; 438 } 439 440 static int des_ede3_wrap(EVP_CIPHER_CTX *ctx, unsigned char *out, 441 const unsigned char *in, size_t inl) 442 { 443 unsigned char sha1tmp[SHA_DIGEST_LENGTH]; 444 if (out == NULL) 445 return inl + 16; 446 /* Copy input to output buffer + 8 so we have space for IV */ 447 memmove(out + 8, in, inl); 448 /* Work out ICV */ 449 SHA1(in, inl, sha1tmp); 450 memcpy(out + inl + 8, sha1tmp, 8); 451 OPENSSL_cleanse(sha1tmp, SHA_DIGEST_LENGTH); 452 /* Generate random IV */ 453 if (RAND_bytes(ctx->iv, 8) <= 0) 454 return -1; 455 memcpy(out, ctx->iv, 8); 456 /* Encrypt everything after IV in place */ 457 des_ede_cbc_cipher(ctx, out + 8, out + 8, inl + 8); 458 BUF_reverse(out, NULL, inl + 16); 459 memcpy(ctx->iv, wrap_iv, 8); 460 des_ede_cbc_cipher(ctx, out, out, inl + 16); 461 return inl + 16; 462 } 463 464 static int des_ede3_wrap_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 465 const unsigned char *in, size_t inl) 466 { 467 /* 468 * Sanity check input length: we typically only wrap keys so EVP_MAXCHUNK 469 * is more than will ever be needed. Also input length must be a multiple 470 * of 8 bits. 471 */ 472 if (inl >= EVP_MAXCHUNK || inl % 8) 473 return -1; 474 if (ctx->encrypt) 475 return des_ede3_wrap(ctx, out, in, inl); 476 else 477 return des_ede3_unwrap(ctx, out, in, inl); 478 } 479 480 static const EVP_CIPHER des3_wrap = { 481 NID_id_smime_alg_CMS3DESwrap, 482 8, 24, 0, 483 EVP_CIPH_WRAP_MODE | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER 484 | EVP_CIPH_FLAG_DEFAULT_ASN1, 485 des_ede3_init_key, des_ede3_wrap_cipher, 486 NULL, 487 sizeof(DES_EDE_KEY), 488 NULL, NULL, NULL, NULL 489 }; 490 491 const EVP_CIPHER *EVP_des_ede3_wrap(void) 492 { 493 return &des3_wrap; 494 } 495 496 # endif 497 #endif 498