release/src/router/openssl/crypto/evp/e_des3.c

   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     for (n = 0; n < inl; ++n) {
 216         c[0] = (in[n / 8] & (1 << (7 - n % 8))) ? 0x80 : 0;
 217         DES_ede3_cfb_encrypt(c, d, 1, 1,
 218                              &data(ctx)->ks1, &data(ctx)->ks2,
 219                              &data(ctx)->ks3, (DES_cblock *)ctx->iv,
 220                              ctx->encrypt);
 221         out[n / 8] = (out[n / 8] & ~(0x80 >> (unsigned int)(n % 8)))
 222             | ((d[0] & 0x80) >> (unsigned int)(n % 8));
 223     }
 224
 225     return 1;
 226 }
 227
 228 static int des_ede3_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 229                                 const unsigned char *in, size_t inl)
 230 {
 231     while (inl >= EVP_MAXCHUNK) {
 232         DES_ede3_cfb_encrypt(in, out, 8, (long)EVP_MAXCHUNK,
 233                              &data(ctx)->ks1, &data(ctx)->ks2,
 234                              &data(ctx)->ks3, (DES_cblock *)ctx->iv,
 235                              ctx->encrypt);
 236         inl -= EVP_MAXCHUNK;
 237         in += EVP_MAXCHUNK;
 238         out += EVP_MAXCHUNK;
 239     }
 240     if (inl)
 241         DES_ede3_cfb_encrypt(in, out, 8, (long)inl,
 242                              &data(ctx)->ks1, &data(ctx)->ks2,
 243                              &data(ctx)->ks3, (DES_cblock *)ctx->iv,
 244                              ctx->encrypt);
 245     return 1;
 246 }
 247
 248 BLOCK_CIPHER_defs(des_ede, DES_EDE_KEY, NID_des_ede, 8, 16, 8, 64,
 249                   EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_DEFAULT_ASN1,
 250                   des_ede_init_key, NULL, NULL, NULL, des3_ctrl)
 251 # define des_ede3_cfb64_cipher des_ede_cfb64_cipher
 252 # define des_ede3_ofb_cipher des_ede_ofb_cipher
 253 # define des_ede3_cbc_cipher des_ede_cbc_cipher
 254 # define des_ede3_ecb_cipher des_ede_ecb_cipher
 255     BLOCK_CIPHER_defs(des_ede3, DES_EDE_KEY, NID_des_ede3, 8, 24, 8, 64,
 256                   EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_FIPS |
 257                   EVP_CIPH_FLAG_DEFAULT_ASN1, des_ede3_init_key, NULL, NULL, NULL,
 258                   des3_ctrl)
 259
 260     BLOCK_CIPHER_def_cfb(des_ede3, DES_EDE_KEY, NID_des_ede3, 24, 8, 1,
 261                      EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_FIPS |
 262                      EVP_CIPH_FLAG_DEFAULT_ASN1, des_ede3_init_key, NULL, NULL,
 263                      NULL, des3_ctrl)
 264
 265     BLOCK_CIPHER_def_cfb(des_ede3, DES_EDE_KEY, NID_des_ede3, 24, 8, 8,
 266                      EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_FIPS |
 267                      EVP_CIPH_FLAG_DEFAULT_ASN1, des_ede3_init_key, NULL, NULL,
 268                      NULL, des3_ctrl)
 269
 270 static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 271                             const unsigned char *iv, int enc)
 272 {
 273     DES_cblock *deskey = (DES_cblock *)key;
 274     DES_EDE_KEY *dat = data(ctx);
 275
 276     dat->stream.cbc = NULL;
 277 # if defined(SPARC_DES_CAPABLE)
 278     if (SPARC_DES_CAPABLE) {
 279         int mode = ctx->cipher->flags & EVP_CIPH_MODE;
 280
 281         if (mode == EVP_CIPH_CBC_MODE) {
 282             des_t4_key_expand(&deskey[0], &dat->ks1);
 283             des_t4_key_expand(&deskey[1], &dat->ks2);
 284             memcpy(&dat->ks3, &dat->ks1, sizeof(dat->ks1));
 285             dat->stream.cbc = enc ? des_t4_ede3_cbc_encrypt :
 286                 des_t4_ede3_cbc_decrypt;
 287             return 1;
 288         }
 289     }
 290 # endif
 291 # ifdef EVP_CHECK_DES_KEY
 292     if (DES_set_key_checked(&deskey[0], &dat->ks1)
 293         || DES_set_key_checked(&deskey[1], &dat->ks2))
 294         return 0;
 295 # else
 296     DES_set_key_unchecked(&deskey[0], &dat->ks1);
 297     DES_set_key_unchecked(&deskey[1], &dat->ks2);
 298 # endif
 299     memcpy(&dat->ks3, &dat->ks1, sizeof(dat->ks1));
 300     return 1;
 301 }
 302
 303 static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 304                              const unsigned char *iv, int enc)
 305 {
 306     DES_cblock *deskey = (DES_cblock *)key;
 307     DES_EDE_KEY *dat = data(ctx);
 308
 309 # ifdef KSSL_DEBUG
 310     {
 311         int i;
 312         fprintf(stderr, "des_ede3_init_key(ctx=%p)\n", ctx);
 313         fprintf(stderr, "\tKEY= ");
 314         for (i = 0; i < 24; i++)
 315             fprintf(stderr, "%02X", key[i]);
 316         fprintf(stderr, "\n");
 317         if (iv) {
 318             fprintf(stderr, "\t IV= ");
 319             for (i = 0; i < 8; i++)
 320                 fprintf(stderr, "%02X", iv[i]);
 321             fprintf(stderr, "\n");
 322         }
 323     }
 324 # endif                         /* KSSL_DEBUG */
 325
 326     dat->stream.cbc = NULL;
 327 # if defined(SPARC_DES_CAPABLE)
 328     if (SPARC_DES_CAPABLE) {
 329         int mode = ctx->cipher->flags & EVP_CIPH_MODE;
 330
 331         if (mode == EVP_CIPH_CBC_MODE) {
 332             des_t4_key_expand(&deskey[0], &dat->ks1);
 333             des_t4_key_expand(&deskey[1], &dat->ks2);
 334             des_t4_key_expand(&deskey[2], &dat->ks3);
 335             dat->stream.cbc = enc ? des_t4_ede3_cbc_encrypt :
 336                 des_t4_ede3_cbc_decrypt;
 337             return 1;
 338         }
 339     }
 340 # endif
 341 # ifdef EVP_CHECK_DES_KEY
 342     if (DES_set_key_checked(&deskey[0], &dat->ks1)
 343         || DES_set_key_checked(&deskey[1], &dat->ks2)
 344         || DES_set_key_checked(&deskey[2], &dat->ks3))
 345         return 0;
 346 # else
 347     DES_set_key_unchecked(&deskey[0], &dat->ks1);
 348     DES_set_key_unchecked(&deskey[1], &dat->ks2);
 349     DES_set_key_unchecked(&deskey[2], &dat->ks3);
 350 # endif
 351     return 1;
 352 }
 353
 354 static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
 355 {
 356
 357     DES_cblock *deskey = ptr;
 358
 359     switch (type) {
 360     case EVP_CTRL_RAND_KEY:
 361         if (RAND_bytes(ptr, c->key_len) <= 0)
 362             return 0;
 363         DES_set_odd_parity(deskey);
 364         if (c->key_len >= 16)
 365             DES_set_odd_parity(deskey + 1);
 366         if (c->key_len >= 24)
 367             DES_set_odd_parity(deskey + 2);
 368         return 1;
 369
 370     default:
 371         return -1;
 372     }
 373 }
 374
 375 const EVP_CIPHER *EVP_des_ede(void)
 376 {
 377     return &des_ede_ecb;
 378 }
 379
 380 const EVP_CIPHER *EVP_des_ede3(void)
 381 {
 382     return &des_ede3_ecb;
 383 }
 384
 385 # ifndef OPENSSL_NO_SHA
 386
 387 #  include <openssl/sha.h>
 388
 389 static const unsigned char wrap_iv[8] =
 390     { 0x4a, 0xdd, 0xa2, 0x2c, 0x79, 0xe8, 0x21, 0x05 };
 391
 392 static int des_ede3_unwrap(EVP_CIPHER_CTX *ctx, unsigned char *out,
 393                            const unsigned char *in, size_t inl)
 394 {
 395     unsigned char icv[8], iv[8], sha1tmp[SHA_DIGEST_LENGTH];
 396     int rv = -1;
 397     if (inl < 24)
 398         return -1;
 399     if (out == NULL)
 400         return inl - 16;
 401     memcpy(ctx->iv, wrap_iv, 8);
 402     /* Decrypt first block which will end up as icv */
 403     des_ede_cbc_cipher(ctx, icv, in, 8);
 404     /* Decrypt central blocks */
 405     /*
 406      * If decrypting in place move whole output along a block so the next
 407      * des_ede_cbc_cipher is in place.
 408      */
 409     if (out == in) {
 410         memmove(out, out + 8, inl - 8);
 411         in -= 8;
 412     }
 413     des_ede_cbc_cipher(ctx, out, in + 8, inl - 16);
 414     /* Decrypt final block which will be IV */
 415     des_ede_cbc_cipher(ctx, iv, in + inl - 8, 8);
 416     /* Reverse order of everything */
 417     BUF_reverse(icv, NULL, 8);
 418     BUF_reverse(out, NULL, inl - 16);
 419     BUF_reverse(ctx->iv, iv, 8);
 420     /* Decrypt again using new IV */
 421     des_ede_cbc_cipher(ctx, out, out, inl - 16);
 422     des_ede_cbc_cipher(ctx, icv, icv, 8);
 423     /* Work out SHA1 hash of first portion */
 424     SHA1(out, inl - 16, sha1tmp);
 425
 426     if (!CRYPTO_memcmp(sha1tmp, icv, 8))
 427         rv = inl - 16;
 428     OPENSSL_cleanse(icv, 8);
 429     OPENSSL_cleanse(sha1tmp, SHA_DIGEST_LENGTH);
 430     OPENSSL_cleanse(iv, 8);
 431     OPENSSL_cleanse(ctx->iv, 8);
 432     if (rv == -1)
 433         OPENSSL_cleanse(out, inl - 16);
 434
 435     return rv;
 436 }
 437
 438 static int des_ede3_wrap(EVP_CIPHER_CTX *ctx, unsigned char *out,
 439                          const unsigned char *in, size_t inl)
 440 {
 441     unsigned char sha1tmp[SHA_DIGEST_LENGTH];
 442     if (out == NULL)
 443         return inl + 16;
 444     /* Copy input to output buffer + 8 so we have space for IV */
 445     memmove(out + 8, in, inl);
 446     /* Work out ICV */
 447     SHA1(in, inl, sha1tmp);
 448     memcpy(out + inl + 8, sha1tmp, 8);
 449     OPENSSL_cleanse(sha1tmp, SHA_DIGEST_LENGTH);
 450     /* Generate random IV */
 451     if (RAND_bytes(ctx->iv, 8) <= 0)
 452         return -1;
 453     memcpy(out, ctx->iv, 8);
 454     /* Encrypt everything after IV in place */
 455     des_ede_cbc_cipher(ctx, out + 8, out + 8, inl + 8);
 456     BUF_reverse(out, NULL, inl + 16);
 457     memcpy(ctx->iv, wrap_iv, 8);
 458     des_ede_cbc_cipher(ctx, out, out, inl + 16);
 459     return inl + 16;
 460 }
 461
 462 static int des_ede3_wrap_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 463                                 const unsigned char *in, size_t inl)
 464 {
 465     /*
 466      * Sanity check input length: we typically only wrap keys so EVP_MAXCHUNK
 467      * is more than will ever be needed. Also input length must be a multiple
 468      * of 8 bits.
 469      */
 470     if (inl >= EVP_MAXCHUNK || inl % 8)
 471         return -1;
 472     if (ctx->encrypt)
 473         return des_ede3_wrap(ctx, out, in, inl);
 474     else
 475         return des_ede3_unwrap(ctx, out, in, inl);
 476 }
 477
 478 static const EVP_CIPHER des3_wrap = {
 479     NID_id_smime_alg_CMS3DESwrap,
 480     8, 24, 0,
 481     EVP_CIPH_WRAP_MODE | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
 482         | EVP_CIPH_FLAG_DEFAULT_ASN1,
 483     des_ede3_init_key, des_ede3_wrap_cipher,
 484     NULL,
 485     sizeof(DES_EDE_KEY),
 486     NULL, NULL, NULL, NULL
 487 };
 488
 489 const EVP_CIPHER *EVP_des_ede3_wrap(void)
 490 {
 491     return &des3_wrap;
 492 }
 493
 494 # endif
 495 #endif