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, 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
  90 extern unsigned int OPENSSL_sparcv9cap_P[];
  91
  92 #  define SPARC_DES_CAPABLE       (OPENSSL_sparcv9cap_P[1] & CFR_DES)
  93
  94 void des_t4_key_expand(const void *key, DES_key_schedule *ks);
  95 void des_t4_ede3_cbc_encrypt(const void *inp, void *out, size_t len,
  96                              DES_key_schedule *ks, unsigned char iv[8]);
  97 void 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
 101 static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 102                             const unsigned char *iv, int enc);
 103
 104 static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 105                              const unsigned char *iv, int enc);
 106
 107 static 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
 116 static 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
 127 static 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
 148 static 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
 184 static 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  */
 208 static 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
 227 static 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
 247 BLOCK_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
 269 static 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
 302 static 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
 353 static 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
 374 const EVP_CIPHER *EVP_des_ede(void)
 375 {
 376     return &des_ede_ecb;
 377 }
 378
 379 const 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
 388 static const unsigned char wrap_iv[8] =
 389     { 0x4a, 0xdd, 0xa2, 0x2c, 0x79, 0xe8, 0x21, 0x05 };
 390
 391 static 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
 437 static 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
 461 static 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
 477 static 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
 488 const EVP_CIPHER *EVP_des_ede3_wrap(void)
 489 {
 490     return &des3_wrap;
 491 }
 492
 493 # endif
 494 #endif