crypto/evp/evp_lib.c

   1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   2  * All rights reserved.
   3  *
   4  * This package is an SSL implementation written
   5  * by Eric Young (eay@cryptsoft.com).
   6  * The implementation was written so as to conform with Netscapes SSL.
   7  *
   8  * This library is free for commercial and non-commercial use as long as
   9  * the following conditions are aheared to.  The following conditions
  10  * apply to all code found in this distribution, be it the RC4, RSA,
  11  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  12  * included with this distribution is covered by the same copyright terms
  13  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  14  *
  15  * Copyright remains Eric Young's, and as such any Copyright notices in
  16  * the code are not to be removed.
  17  * If this package is used in a product, Eric Young should be given attribution
  18  * as the author of the parts of the library used.
  19  * This can be in the form of a textual message at program startup or
  20  * in documentation (online or textual) provided with the package.
  21  *
  22  * Redistribution and use in source and binary forms, with or without
  23  * modification, are permitted provided that the following conditions
  24  * are met:
  25  * 1. Redistributions of source code must retain the copyright
  26  *    notice, this list of conditions and the following disclaimer.
  27  * 2. Redistributions in binary form must reproduce the above copyright
  28  *    notice, this list of conditions and the following disclaimer in the
  29  *    documentation and/or other materials provided with the distribution.
  30  * 3. All advertising materials mentioning features or use of this software
  31  *    must display the following acknowledgement:
  32  *    "This product includes cryptographic software written by
  33  *     Eric Young (eay@cryptsoft.com)"
  34  *    The word 'cryptographic' can be left out if the rouines from the library
  35  *    being used are not cryptographic related :-).
  36  * 4. If you include any Windows specific code (or a derivative thereof) from
  37  *    the apps directory (application code) you must include an acknowledgement:
  38  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  50  * SUCH DAMAGE.
  51  *
  52  * The licence and distribution terms for any publically available version or
  53  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  54  * copied and put under another distribution licence
  55  * [including the GNU Public Licence.]
  56  */
  57
  58 #include <stdio.h>
  59 #include "internal/cryptlib.h"
  60 #include <openssl/evp.h>
  61 #include <openssl/objects.h>
  62 #include "internal/evp_int.h"
  63 #include "evp_locl.h"
  64
  65 int EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
  66 {
  67     int ret;
  68
  69     if (c->cipher->set_asn1_parameters != NULL)
  70         ret = c->cipher->set_asn1_parameters(c, type);
  71     else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) {
  72         switch (EVP_CIPHER_CTX_mode(c)) {
  73         case EVP_CIPH_WRAP_MODE:
  74             if (EVP_CIPHER_CTX_nid(c) == NID_id_smime_alg_CMS3DESwrap)
  75                 ASN1_TYPE_set(type, V_ASN1_NULL, NULL);
  76             ret = 1;
  77             break;
  78
  79         case EVP_CIPH_GCM_MODE:
  80         case EVP_CIPH_CCM_MODE:
  81         case EVP_CIPH_XTS_MODE:
  82         case EVP_CIPH_OCB_MODE:
  83             ret = -1;
  84             break;
  85
  86         default:
  87             ret = EVP_CIPHER_set_asn1_iv(c, type);
  88         }
  89     } else
  90         ret = -1;
  91     return (ret);
  92 }
  93
  94 int EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
  95 {
  96     int ret;
  97
  98     if (c->cipher->get_asn1_parameters != NULL)
  99         ret = c->cipher->get_asn1_parameters(c, type);
 100     else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) {
 101         switch (EVP_CIPHER_CTX_mode(c)) {
 102
 103         case EVP_CIPH_WRAP_MODE:
 104             ret = 1;
 105             break;
 106
 107         case EVP_CIPH_GCM_MODE:
 108         case EVP_CIPH_CCM_MODE:
 109         case EVP_CIPH_XTS_MODE:
 110         case EVP_CIPH_OCB_MODE:
 111             ret = -1;
 112             break;
 113
 114         default:
 115             ret = EVP_CIPHER_get_asn1_iv(c, type);
 116             break;
 117         }
 118     } else
 119         ret = -1;
 120     return (ret);
 121 }
 122
 123 int EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
 124 {
 125     int i = 0;
 126     unsigned int l;
 127
 128     if (type != NULL) {
 129         l = EVP_CIPHER_CTX_iv_length(c);
 130         OPENSSL_assert(l <= sizeof(c->iv));
 131         i = ASN1_TYPE_get_octetstring(type, c->oiv, l);
 132         if (i != (int)l)
 133             return (-1);
 134         else if (i > 0)
 135             memcpy(c->iv, c->oiv, l);
 136     }
 137     return (i);
 138 }
 139
 140 int EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
 141 {
 142     int i = 0;
 143     unsigned int j;
 144
 145     if (type != NULL) {
 146         j = EVP_CIPHER_CTX_iv_length(c);
 147         OPENSSL_assert(j <= sizeof(c->iv));
 148         i = ASN1_TYPE_set_octetstring(type, c->oiv, j);
 149     }
 150     return (i);
 151 }
 152
 153 /* Convert the various cipher NIDs and dummies to a proper OID NID */
 154 int EVP_CIPHER_type(const EVP_CIPHER *ctx)
 155 {
 156     int nid;
 157     ASN1_OBJECT *otmp;
 158     nid = EVP_CIPHER_nid(ctx);
 159
 160     switch (nid) {
 161
 162     case NID_rc2_cbc:
 163     case NID_rc2_64_cbc:
 164     case NID_rc2_40_cbc:
 165
 166         return NID_rc2_cbc;
 167
 168     case NID_rc4:
 169     case NID_rc4_40:
 170
 171         return NID_rc4;
 172
 173     case NID_aes_128_cfb128:
 174     case NID_aes_128_cfb8:
 175     case NID_aes_128_cfb1:
 176
 177         return NID_aes_128_cfb128;
 178
 179     case NID_aes_192_cfb128:
 180     case NID_aes_192_cfb8:
 181     case NID_aes_192_cfb1:
 182
 183         return NID_aes_192_cfb128;
 184
 185     case NID_aes_256_cfb128:
 186     case NID_aes_256_cfb8:
 187     case NID_aes_256_cfb1:
 188
 189         return NID_aes_256_cfb128;
 190
 191     case NID_des_cfb64:
 192     case NID_des_cfb8:
 193     case NID_des_cfb1:
 194
 195         return NID_des_cfb64;
 196
 197     case NID_des_ede3_cfb64:
 198     case NID_des_ede3_cfb8:
 199     case NID_des_ede3_cfb1:
 200
 201         return NID_des_cfb64;
 202
 203     default:
 204         /* Check it has an OID and it is valid */
 205         otmp = OBJ_nid2obj(nid);
 206         if (OBJ_get0_data(otmp) == NULL)
 207             nid = NID_undef;
 208         ASN1_OBJECT_free(otmp);
 209         return nid;
 210     }
 211 }
 212
 213 int EVP_CIPHER_block_size(const EVP_CIPHER *e)
 214 {
 215     return e->block_size;
 216 }
 217
 218 int EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx)
 219 {
 220     return ctx->cipher->block_size;
 221 }
 222
 223 int EVP_CIPHER_impl_ctx_size(const EVP_CIPHER *e)
 224 {
 225     return e->ctx_size;
 226 }
 227
 228 int EVP_Cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 229                const unsigned char *in, unsigned int inl)
 230 {
 231     return ctx->cipher->do_cipher(ctx, out, in, inl);
 232 }
 233
 234 const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx)
 235 {
 236     return ctx->cipher;
 237 }
 238
 239 int EVP_CIPHER_CTX_encrypting(const EVP_CIPHER_CTX *ctx)
 240 {
 241     return ctx->encrypt;
 242 }
 243
 244 unsigned long EVP_CIPHER_flags(const EVP_CIPHER *cipher)
 245 {
 246     return cipher->flags;
 247 }
 248
 249 void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx)
 250 {
 251     return ctx->app_data;
 252 }
 253
 254 void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data)
 255 {
 256     ctx->app_data = data;
 257 }
 258
 259 void *EVP_CIPHER_CTX_cipher_data(const EVP_CIPHER_CTX *ctx)
 260 {
 261     return ctx->cipher_data;
 262 }
 263
 264 int EVP_CIPHER_iv_length(const EVP_CIPHER *cipher)
 265 {
 266     return cipher->iv_len;
 267 }
 268
 269 int EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx)
 270 {
 271     return ctx->cipher->iv_len;
 272 }
 273
 274 const unsigned char *EVP_CIPHER_CTX_original_iv(const EVP_CIPHER_CTX *ctx)
 275 {
 276     return ctx->oiv;
 277 }
 278
 279 const unsigned char *EVP_CIPHER_CTX_iv(const EVP_CIPHER_CTX *ctx)
 280 {
 281     return ctx->iv;
 282 }
 283
 284 unsigned char *EVP_CIPHER_CTX_iv_noconst(EVP_CIPHER_CTX *ctx)
 285 {
 286     return ctx->iv;
 287 }
 288
 289 unsigned char *EVP_CIPHER_CTX_buf_noconst(EVP_CIPHER_CTX *ctx)
 290 {
 291     return ctx->buf;
 292 }
 293
 294 int EVP_CIPHER_CTX_num(const EVP_CIPHER_CTX *ctx)
 295 {
 296     return ctx->num;
 297 }
 298
 299 void EVP_CIPHER_CTX_set_num(EVP_CIPHER_CTX *ctx, int num)
 300 {
 301     ctx->num = num;
 302 }
 303
 304 int EVP_CIPHER_key_length(const EVP_CIPHER *cipher)
 305 {
 306     return cipher->key_len;
 307 }
 308
 309 int EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx)
 310 {
 311     return ctx->key_len;
 312 }
 313
 314 int EVP_CIPHER_nid(const EVP_CIPHER *cipher)
 315 {
 316     return cipher->nid;
 317 }
 318
 319 int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx)
 320 {
 321     return ctx->cipher->nid;
 322 }
 323
 324 int EVP_MD_block_size(const EVP_MD *md)
 325 {
 326     return md->block_size;
 327 }
 328
 329 int EVP_MD_type(const EVP_MD *md)
 330 {
 331     return md->type;
 332 }
 333
 334 int EVP_MD_pkey_type(const EVP_MD *md)
 335 {
 336     return md->pkey_type;
 337 }
 338
 339 int EVP_MD_size(const EVP_MD *md)
 340 {
 341     if (!md) {
 342         EVPerr(EVP_F_EVP_MD_SIZE, EVP_R_MESSAGE_DIGEST_IS_NULL);
 343         return -1;
 344     }
 345     return md->md_size;
 346 }
 347
 348 unsigned long EVP_MD_flags(const EVP_MD *md)
 349 {
 350     return md->flags;
 351 }
 352
 353 EVP_MD *EVP_MD_meth_new(int md_type, int pkey_type)
 354 {
 355     EVP_MD *md = (EVP_MD *)OPENSSL_zalloc(sizeof(EVP_MD));
 356     if (md != NULL) {
 357         md->type = md_type;
 358         md->pkey_type = pkey_type;
 359     }
 360     return md;
 361 }
 362 EVP_MD *EVP_MD_meth_dup(const EVP_MD *md)
 363 {
 364     EVP_MD *to = EVP_MD_meth_new(md->type, md->pkey_type);
 365     if (md != NULL)
 366         memcpy(to, md, sizeof(*to));
 367     return to;
 368 }
 369 void EVP_MD_meth_free(EVP_MD *md)
 370 {
 371     OPENSSL_free(md);
 372 }
 373 int EVP_MD_meth_set_input_blocksize(EVP_MD *md, int blocksize)
 374 {
 375     md->block_size = blocksize;
 376     return 1;
 377 }
 378 int EVP_MD_meth_set_result_size(EVP_MD *md, int resultsize)
 379 {
 380     md->md_size = resultsize;
 381     return 1;
 382 }
 383 int EVP_MD_meth_set_app_datasize(EVP_MD *md, int datasize)
 384 {
 385     md->ctx_size = datasize;
 386     return 1;
 387 }
 388 int EVP_MD_meth_set_flags(EVP_MD *md, unsigned long flags)
 389 {
 390     md->flags = flags;
 391     return 1;
 392 }
 393 int EVP_MD_meth_set_init(EVP_MD *md, int (*init)(EVP_MD_CTX *ctx))
 394 {
 395     md->init = init;
 396     return 1;
 397 }
 398 int EVP_MD_meth_set_update(EVP_MD *md, int (*update)(EVP_MD_CTX *ctx,
 399                                                      const void *data,
 400                                                      size_t count))
 401 {
 402     md->update = update;
 403     return 1;
 404 }
 405 int EVP_MD_meth_set_final(EVP_MD *md, int (*final)(EVP_MD_CTX *ctx,
 406                                                    unsigned char *md))
 407 {
 408     md->final = final;
 409     return 1;
 410 }
 411 int EVP_MD_meth_set_copy(EVP_MD *md, int (*copy)(EVP_MD_CTX *to,
 412                                                  const EVP_MD_CTX *from))
 413 {
 414     md->copy = copy;
 415     return 1;
 416 }
 417 int EVP_MD_meth_set_cleanup(EVP_MD *md, int (*cleanup)(EVP_MD_CTX *ctx))
 418 {
 419     md->cleanup = cleanup;
 420     return 1;
 421 }
 422 int EVP_MD_meth_set_ctrl(EVP_MD *md, int (*ctrl)(EVP_MD_CTX *ctx, int cmd,
 423                                                  int p1, void *p2))
 424 {
 425     md->md_ctrl = ctrl;
 426     return 1;
 427 }
 428
 429 int EVP_MD_meth_get_input_blocksize(const EVP_MD *md)
 430 {
 431     return md->block_size;
 432 }
 433 int EVP_MD_meth_get_result_size(const EVP_MD *md)
 434 {
 435     return md->md_size;
 436 }
 437 int EVP_MD_meth_get_app_datasize(const EVP_MD *md)
 438 {
 439     return md->ctx_size;
 440 }
 441 unsigned long EVP_MD_meth_get_flags(const EVP_MD *md)
 442 {
 443     return md->block_size;
 444 }
 445 int (*EVP_MD_meth_get_init(const EVP_MD *md))(EVP_MD_CTX *ctx)
 446 {
 447     return md->init;
 448 }
 449 int (*EVP_MD_meth_get_update(const EVP_MD *md))(EVP_MD_CTX *ctx,
 450                                                 const void *data,
 451                                                 size_t count)
 452 {
 453     return md->update;
 454 }
 455 int (*EVP_MD_meth_get_final(const EVP_MD *md))(EVP_MD_CTX *ctx,
 456                                                unsigned char *md)
 457 {
 458     return md->final;
 459 }
 460 int (*EVP_MD_meth_get_copy(const EVP_MD *md))(EVP_MD_CTX *to,
 461                                               const EVP_MD_CTX *from)
 462 {
 463     return md->copy;
 464 }
 465 int (*EVP_MD_meth_get_cleanup(const EVP_MD *md))(EVP_MD_CTX *ctx)
 466 {
 467     return md->cleanup;
 468 }
 469 int (*EVP_MD_meth_get_ctrl(const EVP_MD *md))(EVP_MD_CTX *ctx, int cmd,
 470                                               int p1, void *p2)
 471 {
 472     return md->md_ctrl;
 473 }
 474
 475 const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx)
 476 {
 477     if (!ctx)
 478         return NULL;
 479     return ctx->digest;
 480 }
 481
 482 EVP_PKEY_CTX *EVP_MD_CTX_pkey_ctx(const EVP_MD_CTX *ctx)
 483 {
 484     return ctx->pctx;
 485 }
 486
 487 void *EVP_MD_CTX_md_data(const EVP_MD_CTX *ctx)
 488 {
 489     return ctx->md_data;
 490 }
 491
 492 int (*EVP_MD_CTX_update_fn(EVP_MD_CTX *ctx))(EVP_MD_CTX *ctx,
 493                                              const void *data, size_t count)
 494 {
 495     return ctx->update;
 496 }
 497
 498 void EVP_MD_CTX_set_update_fn(EVP_MD_CTX *ctx,
 499                               int (*update) (EVP_MD_CTX *ctx,
 500                                              const void *data, size_t count))
 501 {
 502     ctx->update = update;
 503 }
 504
 505 void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags)
 506 {
 507     ctx->flags |= flags;
 508 }
 509
 510 void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags)
 511 {
 512     ctx->flags &= ~flags;
 513 }
 514
 515 int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags)
 516 {
 517     return (ctx->flags & flags);
 518 }
 519
 520 void EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags)
 521 {
 522     ctx->flags |= flags;
 523 }
 524
 525 void EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags)
 526 {
 527     ctx->flags &= ~flags;
 528 }
 529
 530 int EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags)
 531 {
 532     return (ctx->flags & flags);
 533 }