e_des3.c revision 290207
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 72typedef struct { 73 union { 74 double align; 75 DES_key_schedule ks[3]; 76 } ks; 77 union { 78 void (*cbc) (const void *, void *, size_t, const void *, void *); 79 } stream; 80} DES_EDE_KEY; 81# define ks1 ks.ks[0] 82# define ks2 ks.ks[1] 83# define ks3 ks.ks[2] 84 85# if defined(AES_ASM) && (defined(__sparc) || defined(__sparc__)) 86/* ---------^^^ this is not a typo, just a way to detect that 87 * assembler support was in general requested... */ 88# include "sparc_arch.h" 89 90extern unsigned int OPENSSL_sparcv9cap_P[]; 91 92# define SPARC_DES_CAPABLE (OPENSSL_sparcv9cap_P[1] & CFR_DES) 93 94void des_t4_key_expand(const void *key, DES_key_schedule *ks); 95void des_t4_ede3_cbc_encrypt(const void *inp, void *out, size_t len, 96 DES_key_schedule *ks, unsigned char iv[8]); 97void des_t4_ede3_cbc_decrypt(const void *inp, void *out, size_t len, 98 DES_key_schedule *ks, unsigned char iv[8]); 99# endif 100 101static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 102 const unsigned char *iv, int enc); 103 104static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 105 const unsigned char *iv, int enc); 106 107static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr); 108 109# define data(ctx) ((DES_EDE_KEY *)(ctx)->cipher_data) 110 111/* 112 * Because of various casts and different args can't use 113 * IMPLEMENT_BLOCK_CIPHER 114 */ 115 116static int des_ede_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 117 const unsigned char *in, size_t inl) 118{ 119 BLOCK_CIPHER_ecb_loop() 120 DES_ecb3_encrypt((const_DES_cblock *)(in + i), 121 (DES_cblock *)(out + i), 122 &data(ctx)->ks1, &data(ctx)->ks2, 123 &data(ctx)->ks3, ctx->encrypt); 124 return 1; 125} 126 127static int des_ede_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 128 const unsigned char *in, size_t inl) 129{ 130 while (inl >= EVP_MAXCHUNK) { 131 DES_ede3_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK, 132 &data(ctx)->ks1, &data(ctx)->ks2, 133 &data(ctx)->ks3, (DES_cblock *)ctx->iv, 134 &ctx->num); 135 inl -= EVP_MAXCHUNK; 136 in += EVP_MAXCHUNK; 137 out += EVP_MAXCHUNK; 138 } 139 if (inl) 140 DES_ede3_ofb64_encrypt(in, out, (long)inl, 141 &data(ctx)->ks1, &data(ctx)->ks2, 142 &data(ctx)->ks3, (DES_cblock *)ctx->iv, 143 &ctx->num); 144 145 return 1; 146} 147 148static int des_ede_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 149 const unsigned char *in, size_t inl) 150{ 151 DES_EDE_KEY *dat = data(ctx); 152 153# ifdef KSSL_DEBUG 154 { 155 int i; 156 fprintf(stderr, "des_ede_cbc_cipher(ctx=%p, buflen=%d)\n", ctx, 157 ctx->buf_len); 158 fprintf(stderr, "\t iv= "); 159 for (i = 0; i < 8; i++) 160 fprintf(stderr, "%02X", ctx->iv[i]); 161 fprintf(stderr, "\n"); 162 } 163# endif /* KSSL_DEBUG */ 164 if (dat->stream.cbc) { 165 (*dat->stream.cbc) (in, out, inl, &dat->ks, ctx->iv); 166 return 1; 167 } 168 169 while (inl >= EVP_MAXCHUNK) { 170 DES_ede3_cbc_encrypt(in, out, (long)EVP_MAXCHUNK, 171 &dat->ks1, &dat->ks2, &dat->ks3, 172 (DES_cblock *)ctx->iv, ctx->encrypt); 173 inl -= EVP_MAXCHUNK; 174 in += EVP_MAXCHUNK; 175 out += EVP_MAXCHUNK; 176 } 177 if (inl) 178 DES_ede3_cbc_encrypt(in, out, (long)inl, 179 &dat->ks1, &dat->ks2, &dat->ks3, 180 (DES_cblock *)ctx->iv, ctx->encrypt); 181 return 1; 182} 183 184static int des_ede_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 185 const unsigned char *in, size_t inl) 186{ 187 while (inl >= EVP_MAXCHUNK) { 188 DES_ede3_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK, 189 &data(ctx)->ks1, &data(ctx)->ks2, 190 &data(ctx)->ks3, (DES_cblock *)ctx->iv, 191 &ctx->num, ctx->encrypt); 192 inl -= EVP_MAXCHUNK; 193 in += EVP_MAXCHUNK; 194 out += EVP_MAXCHUNK; 195 } 196 if (inl) 197 DES_ede3_cfb64_encrypt(in, out, (long)inl, 198 &data(ctx)->ks1, &data(ctx)->ks2, 199 &data(ctx)->ks3, (DES_cblock *)ctx->iv, 200 &ctx->num, ctx->encrypt); 201 return 1; 202} 203 204/* 205 * Although we have a CFB-r implementation for 3-DES, it doesn't pack the 206 * right way, so wrap it here 207 */ 208static int des_ede3_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 209 const unsigned char *in, size_t inl) 210{ 211 size_t n; 212 unsigned char c[1], d[1]; 213 214 for (n = 0; n < inl; ++n) { 215 c[0] = (in[n / 8] & (1 << (7 - n % 8))) ? 0x80 : 0; 216 DES_ede3_cfb_encrypt(c, d, 1, 1, 217 &data(ctx)->ks1, &data(ctx)->ks2, 218 &data(ctx)->ks3, (DES_cblock *)ctx->iv, 219 ctx->encrypt); 220 out[n / 8] = (out[n / 8] & ~(0x80 >> (unsigned int)(n % 8))) 221 | ((d[0] & 0x80) >> (unsigned int)(n % 8)); 222 } 223 224 return 1; 225} 226 227static int des_ede3_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 228 const unsigned char *in, size_t inl) 229{ 230 while (inl >= EVP_MAXCHUNK) { 231 DES_ede3_cfb_encrypt(in, out, 8, (long)EVP_MAXCHUNK, 232 &data(ctx)->ks1, &data(ctx)->ks2, 233 &data(ctx)->ks3, (DES_cblock *)ctx->iv, 234 ctx->encrypt); 235 inl -= EVP_MAXCHUNK; 236 in += EVP_MAXCHUNK; 237 out += EVP_MAXCHUNK; 238 } 239 if (inl) 240 DES_ede3_cfb_encrypt(in, out, 8, (long)inl, 241 &data(ctx)->ks1, &data(ctx)->ks2, 242 &data(ctx)->ks3, (DES_cblock *)ctx->iv, 243 ctx->encrypt); 244 return 1; 245} 246 247BLOCK_CIPHER_defs(des_ede, DES_EDE_KEY, NID_des_ede, 8, 16, 8, 64, 248 EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_DEFAULT_ASN1, 249 des_ede_init_key, NULL, NULL, NULL, des3_ctrl) 250# define des_ede3_cfb64_cipher des_ede_cfb64_cipher 251# define des_ede3_ofb_cipher des_ede_ofb_cipher 252# define des_ede3_cbc_cipher des_ede_cbc_cipher 253# define des_ede3_ecb_cipher des_ede_ecb_cipher 254 BLOCK_CIPHER_defs(des_ede3, DES_EDE_KEY, NID_des_ede3, 8, 24, 8, 64, 255 EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_FIPS | 256 EVP_CIPH_FLAG_DEFAULT_ASN1, des_ede3_init_key, NULL, NULL, NULL, 257 des3_ctrl) 258 259 BLOCK_CIPHER_def_cfb(des_ede3, DES_EDE_KEY, NID_des_ede3, 24, 8, 1, 260 EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_FIPS | 261 EVP_CIPH_FLAG_DEFAULT_ASN1, des_ede3_init_key, NULL, NULL, 262 NULL, des3_ctrl) 263 264 BLOCK_CIPHER_def_cfb(des_ede3, DES_EDE_KEY, NID_des_ede3, 24, 8, 8, 265 EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_FIPS | 266 EVP_CIPH_FLAG_DEFAULT_ASN1, des_ede3_init_key, NULL, NULL, 267 NULL, des3_ctrl) 268 269static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 270 const unsigned char *iv, int enc) 271{ 272 DES_cblock *deskey = (DES_cblock *)key; 273 DES_EDE_KEY *dat = data(ctx); 274 275 dat->stream.cbc = NULL; 276# if defined(SPARC_DES_CAPABLE) 277 if (SPARC_DES_CAPABLE) { 278 int mode = ctx->cipher->flags & EVP_CIPH_MODE; 279 280 if (mode == EVP_CIPH_CBC_MODE) { 281 des_t4_key_expand(&deskey[0], &dat->ks1); 282 des_t4_key_expand(&deskey[1], &dat->ks2); 283 memcpy(&dat->ks3, &dat->ks1, sizeof(dat->ks1)); 284 dat->stream.cbc = enc ? des_t4_ede3_cbc_encrypt : 285 des_t4_ede3_cbc_decrypt; 286 return 1; 287 } 288 } 289# endif 290# ifdef EVP_CHECK_DES_KEY 291 if (DES_set_key_checked(&deskey[0], &dat->ks1) 292 ! !DES_set_key_checked(&deskey[1], &dat->ks2)) 293 return 0; 294# else 295 DES_set_key_unchecked(&deskey[0], &dat->ks1); 296 DES_set_key_unchecked(&deskey[1], &dat->ks2); 297# endif 298 memcpy(&dat->ks3, &dat->ks1, sizeof(dat->ks1)); 299 return 1; 300} 301 302static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 303 const unsigned char *iv, int enc) 304{ 305 DES_cblock *deskey = (DES_cblock *)key; 306 DES_EDE_KEY *dat = data(ctx); 307 308# ifdef KSSL_DEBUG 309 { 310 int i; 311 fprintf(stderr, "des_ede3_init_key(ctx=%p)\n", ctx); 312 fprintf(stderr, "\tKEY= "); 313 for (i = 0; i < 24; i++) 314 fprintf(stderr, "%02X", key[i]); 315 fprintf(stderr, "\n"); 316 if (iv) { 317 fprintf(stderr, "\t IV= "); 318 for (i = 0; i < 8; i++) 319 fprintf(stderr, "%02X", iv[i]); 320 fprintf(stderr, "\n"); 321 } 322 } 323# endif /* KSSL_DEBUG */ 324 325 dat->stream.cbc = NULL; 326# if defined(SPARC_DES_CAPABLE) 327 if (SPARC_DES_CAPABLE) { 328 int mode = ctx->cipher->flags & EVP_CIPH_MODE; 329 330 if (mode == EVP_CIPH_CBC_MODE) { 331 des_t4_key_expand(&deskey[0], &dat->ks1); 332 des_t4_key_expand(&deskey[1], &dat->ks2); 333 des_t4_key_expand(&deskey[2], &dat->ks3); 334 dat->stream.cbc = enc ? des_t4_ede3_cbc_encrypt : 335 des_t4_ede3_cbc_decrypt; 336 return 1; 337 } 338 } 339# endif 340# ifdef EVP_CHECK_DES_KEY 341 if (DES_set_key_checked(&deskey[0], &dat->ks1) 342 || DES_set_key_checked(&deskey[1], &dat->ks2) 343 || DES_set_key_checked(&deskey[2], &dat->ks3)) 344 return 0; 345# else 346 DES_set_key_unchecked(&deskey[0], &dat->ks1); 347 DES_set_key_unchecked(&deskey[1], &dat->ks2); 348 DES_set_key_unchecked(&deskey[2], &dat->ks3); 349# endif 350 return 1; 351} 352 353static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) 354{ 355 356 DES_cblock *deskey = ptr; 357 358 switch (type) { 359 case EVP_CTRL_RAND_KEY: 360 if (RAND_bytes(ptr, c->key_len) <= 0) 361 return 0; 362 DES_set_odd_parity(deskey); 363 if (c->key_len >= 16) 364 DES_set_odd_parity(deskey + 1); 365 if (c->key_len >= 24) 366 DES_set_odd_parity(deskey + 2); 367 return 1; 368 369 default: 370 return -1; 371 } 372} 373 374const EVP_CIPHER *EVP_des_ede(void) 375{ 376 return &des_ede_ecb; 377} 378 379const EVP_CIPHER *EVP_des_ede3(void) 380{ 381 return &des_ede3_ecb; 382} 383 384# ifndef OPENSSL_NO_SHA 385 386# include <openssl/sha.h> 387 388static const unsigned char wrap_iv[8] = 389 { 0x4a, 0xdd, 0xa2, 0x2c, 0x79, 0xe8, 0x21, 0x05 }; 390 391static int des_ede3_unwrap(EVP_CIPHER_CTX *ctx, unsigned char *out, 392 const unsigned char *in, size_t inl) 393{ 394 unsigned char icv[8], iv[8], sha1tmp[SHA_DIGEST_LENGTH]; 395 int rv = -1; 396 if (inl < 24) 397 return -1; 398 if (!out) 399 return inl - 16; 400 memcpy(ctx->iv, wrap_iv, 8); 401 /* Decrypt first block which will end up as icv */ 402 des_ede_cbc_cipher(ctx, icv, in, 8); 403 /* Decrypt central blocks */ 404 /* 405 * If decrypting in place move whole output along a block so the next 406 * des_ede_cbc_cipher is in place. 407 */ 408 if (out == in) { 409 memmove(out, out + 8, inl - 8); 410 in -= 8; 411 } 412 des_ede_cbc_cipher(ctx, out, in + 8, inl - 16); 413 /* Decrypt final block which will be IV */ 414 des_ede_cbc_cipher(ctx, iv, in + inl - 8, 8); 415 /* Reverse order of everything */ 416 BUF_reverse(icv, NULL, 8); 417 BUF_reverse(out, NULL, inl - 16); 418 BUF_reverse(ctx->iv, iv, 8); 419 /* Decrypt again using new IV */ 420 des_ede_cbc_cipher(ctx, out, out, inl - 16); 421 des_ede_cbc_cipher(ctx, icv, icv, 8); 422 /* Work out SHA1 hash of first portion */ 423 SHA1(out, inl - 16, sha1tmp); 424 425 if (!CRYPTO_memcmp(sha1tmp, icv, 8)) 426 rv = inl - 16; 427 OPENSSL_cleanse(icv, 8); 428 OPENSSL_cleanse(sha1tmp, SHA_DIGEST_LENGTH); 429 OPENSSL_cleanse(iv, 8); 430 OPENSSL_cleanse(ctx->iv, 8); 431 if (rv == -1) 432 OPENSSL_cleanse(out, inl - 16); 433 434 return rv; 435} 436 437static int des_ede3_wrap(EVP_CIPHER_CTX *ctx, unsigned char *out, 438 const unsigned char *in, size_t inl) 439{ 440 unsigned char sha1tmp[SHA_DIGEST_LENGTH]; 441 if (!out) 442 return inl + 16; 443 /* Copy input to output buffer + 8 so we have space for IV */ 444 memmove(out + 8, in, inl); 445 /* Work out ICV */ 446 SHA1(in, inl, sha1tmp); 447 memcpy(out + inl + 8, sha1tmp, 8); 448 OPENSSL_cleanse(sha1tmp, SHA_DIGEST_LENGTH); 449 /* Generate random IV */ 450 if (RAND_bytes(ctx->iv, 8) <= 0) 451 return -1; 452 memcpy(out, ctx->iv, 8); 453 /* Encrypt everything after IV in place */ 454 des_ede_cbc_cipher(ctx, out + 8, out + 8, inl + 8); 455 BUF_reverse(out, NULL, inl + 16); 456 memcpy(ctx->iv, wrap_iv, 8); 457 des_ede_cbc_cipher(ctx, out, out, inl + 16); 458 return inl + 16; 459} 460 461static int des_ede3_wrap_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 462 const unsigned char *in, size_t inl) 463{ 464 /* 465 * Sanity check input length: we typically only wrap keys so EVP_MAXCHUNK 466 * is more than will ever be needed. Also input length must be a multiple 467 * of 8 bits. 468 */ 469 if (inl >= EVP_MAXCHUNK || inl % 8) 470 return -1; 471 if (ctx->encrypt) 472 return des_ede3_wrap(ctx, out, in, inl); 473 else 474 return des_ede3_unwrap(ctx, out, in, inl); 475} 476 477static const EVP_CIPHER des3_wrap = { 478 NID_id_smime_alg_CMS3DESwrap, 479 8, 24, 0, 480 EVP_CIPH_WRAP_MODE | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER 481 | EVP_CIPH_FLAG_DEFAULT_ASN1, 482 des_ede3_init_key, des_ede3_wrap_cipher, 483 NULL, 484 sizeof(DES_EDE_KEY), 485 NULL, NULL, NULL, NULL 486}; 487 488const EVP_CIPHER *EVP_des_ede3_wrap(void) 489{ 490 return &des3_wrap; 491} 492 493# endif 494#endif 495