crypto/evp/evp_lib.c

   1 /*
   2  * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <stdio.h>
  11 #include "internal/cryptlib.h"
  12 #include <openssl/evp.h>
  13 #include <openssl/objects.h>
  14 #include "internal/evp_int.h"
  15 #include "evp_locl.h"
  16
  17 int EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
  18 {
  19     int ret;
  20
  21     if (c->cipher->set_asn1_parameters != NULL)
  22         ret = c->cipher->set_asn1_parameters(c, type);
  23     else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) {
  24         switch (EVP_CIPHER_CTX_mode(c)) {
  25         case EVP_CIPH_WRAP_MODE:
  26             if (EVP_CIPHER_CTX_nid(c) == NID_id_smime_alg_CMS3DESwrap)
  27                 ASN1_TYPE_set(type, V_ASN1_NULL, NULL);
  28             ret = 1;
  29             break;
  30
  31         case EVP_CIPH_GCM_MODE:
  32         case EVP_CIPH_CCM_MODE:
  33         case EVP_CIPH_XTS_MODE:
  34         case EVP_CIPH_OCB_MODE:
  35             ret = -2;
  36             break;
  37
  38         default:
  39             ret = EVP_CIPHER_set_asn1_iv(c, type);
  40         }
  41     } else
  42         ret = -1;
  43     if (ret <= 0)
  44         EVPerr(EVP_F_EVP_CIPHER_PARAM_TO_ASN1, ret == -2 ?
  45                ASN1_R_UNSUPPORTED_CIPHER :
  46                EVP_R_CIPHER_PARAMETER_ERROR);
  47     if (ret < -1)
  48         ret = -1;
  49     return ret;
  50 }
  51
  52 int EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
  53 {
  54     int ret;
  55
  56     if (c->cipher->get_asn1_parameters != NULL)
  57         ret = c->cipher->get_asn1_parameters(c, type);
  58     else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) {
  59         switch (EVP_CIPHER_CTX_mode(c)) {
  60
  61         case EVP_CIPH_WRAP_MODE:
  62             ret = 1;
  63             break;
  64
  65         case EVP_CIPH_GCM_MODE:
  66         case EVP_CIPH_CCM_MODE:
  67         case EVP_CIPH_XTS_MODE:
  68         case EVP_CIPH_OCB_MODE:
  69             ret = -2;
  70             break;
  71
  72         default:
  73             ret = EVP_CIPHER_get_asn1_iv(c, type);
  74             break;
  75         }
  76     } else
  77         ret = -1;
  78     if (ret <= 0)
  79         EVPerr(EVP_F_EVP_CIPHER_ASN1_TO_PARAM, ret == -2 ?
  80                EVP_R_UNSUPPORTED_CIPHER :
  81                EVP_R_CIPHER_PARAMETER_ERROR);
  82     if (ret < -1)
  83         ret = -1;
  84     return ret;
  85 }
  86
  87 int EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
  88 {
  89     int i = 0;
  90     unsigned int l;
  91
  92     if (type != NULL) {
  93         l = EVP_CIPHER_CTX_iv_length(c);
  94         OPENSSL_assert(l <= sizeof(c->iv));
  95         i = ASN1_TYPE_get_octetstring(type, c->oiv, l);
  96         if (i != (int)l)
  97             return -1;
  98         else if (i > 0)
  99             memcpy(c->iv, c->oiv, l);
 100     }
 101     return i;
 102 }
 103
 104 int EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
 105 {
 106     int i = 0;
 107     unsigned int j;
 108
 109     if (type != NULL) {
 110         j = EVP_CIPHER_CTX_iv_length(c);
 111         OPENSSL_assert(j <= sizeof(c->iv));
 112         i = ASN1_TYPE_set_octetstring(type, c->oiv, j);
 113     }
 114     return i;
 115 }
 116
 117 /* Convert the various cipher NIDs and dummies to a proper OID NID */
 118 int EVP_CIPHER_type(const EVP_CIPHER *ctx)
 119 {
 120     int nid;
 121     ASN1_OBJECT *otmp;
 122     nid = EVP_CIPHER_nid(ctx);
 123
 124     switch (nid) {
 125
 126     case NID_rc2_cbc:
 127     case NID_rc2_64_cbc:
 128     case NID_rc2_40_cbc:
 129
 130         return NID_rc2_cbc;
 131
 132     case NID_rc4:
 133     case NID_rc4_40:
 134
 135         return NID_rc4;
 136
 137     case NID_aes_128_cfb128:
 138     case NID_aes_128_cfb8:
 139     case NID_aes_128_cfb1:
 140
 141         return NID_aes_128_cfb128;
 142
 143     case NID_aes_192_cfb128:
 144     case NID_aes_192_cfb8:
 145     case NID_aes_192_cfb1:
 146
 147         return NID_aes_192_cfb128;
 148
 149     case NID_aes_256_cfb128:
 150     case NID_aes_256_cfb8:
 151     case NID_aes_256_cfb1:
 152
 153         return NID_aes_256_cfb128;
 154
 155     case NID_des_cfb64:
 156     case NID_des_cfb8:
 157     case NID_des_cfb1:
 158
 159         return NID_des_cfb64;
 160
 161     case NID_des_ede3_cfb64:
 162     case NID_des_ede3_cfb8:
 163     case NID_des_ede3_cfb1:
 164
 165         return NID_des_cfb64;
 166
 167     default:
 168         /* Check it has an OID and it is valid */
 169         otmp = OBJ_nid2obj(nid);
 170         if (OBJ_get0_data(otmp) == NULL)
 171             nid = NID_undef;
 172         ASN1_OBJECT_free(otmp);
 173         return nid;
 174     }
 175 }
 176
 177 int EVP_CIPHER_block_size(const EVP_CIPHER *e)
 178 {
 179     return e->block_size;
 180 }
 181
 182 int EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx)
 183 {
 184     return ctx->cipher->block_size;
 185 }
 186
 187 int EVP_CIPHER_impl_ctx_size(const EVP_CIPHER *e)
 188 {
 189     return e->ctx_size;
 190 }
 191
 192 int EVP_Cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 193                const unsigned char *in, unsigned int inl)
 194 {
 195     return ctx->cipher->do_cipher(ctx, out, in, inl);
 196 }
 197
 198 const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx)
 199 {
 200     return ctx->cipher;
 201 }
 202
 203 int EVP_CIPHER_CTX_encrypting(const EVP_CIPHER_CTX *ctx)
 204 {
 205     return ctx->encrypt;
 206 }
 207
 208 unsigned long EVP_CIPHER_flags(const EVP_CIPHER *cipher)
 209 {
 210     return cipher->flags;
 211 }
 212
 213 void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx)
 214 {
 215     return ctx->app_data;
 216 }
 217
 218 void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data)
 219 {
 220     ctx->app_data = data;
 221 }
 222
 223 void *EVP_CIPHER_CTX_get_cipher_data(const EVP_CIPHER_CTX *ctx)
 224 {
 225     return ctx->cipher_data;
 226 }
 227
 228 void *EVP_CIPHER_CTX_set_cipher_data(EVP_CIPHER_CTX *ctx, void *cipher_data)
 229 {
 230     void *old_cipher_data;
 231
 232     old_cipher_data = ctx->cipher_data;
 233     ctx->cipher_data = cipher_data;
 234
 235     return old_cipher_data;
 236 }
 237
 238 int EVP_CIPHER_iv_length(const EVP_CIPHER *cipher)
 239 {
 240     return cipher->iv_len;
 241 }
 242
 243 int EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx)
 244 {
 245     return ctx->cipher->iv_len;
 246 }
 247
 248 const unsigned char *EVP_CIPHER_CTX_original_iv(const EVP_CIPHER_CTX *ctx)
 249 {
 250     return ctx->oiv;
 251 }
 252
 253 const unsigned char *EVP_CIPHER_CTX_iv(const EVP_CIPHER_CTX *ctx)
 254 {
 255     return ctx->iv;
 256 }
 257
 258 unsigned char *EVP_CIPHER_CTX_iv_noconst(EVP_CIPHER_CTX *ctx)
 259 {
 260     return ctx->iv;
 261 }
 262
 263 unsigned char *EVP_CIPHER_CTX_buf_noconst(EVP_CIPHER_CTX *ctx)
 264 {
 265     return ctx->buf;
 266 }
 267
 268 int EVP_CIPHER_CTX_num(const EVP_CIPHER_CTX *ctx)
 269 {
 270     return ctx->num;
 271 }
 272
 273 void EVP_CIPHER_CTX_set_num(EVP_CIPHER_CTX *ctx, int num)
 274 {
 275     ctx->num = num;
 276 }
 277
 278 int EVP_CIPHER_key_length(const EVP_CIPHER *cipher)
 279 {
 280     return cipher->key_len;
 281 }
 282
 283 int EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx)
 284 {
 285     return ctx->key_len;
 286 }
 287
 288 int EVP_CIPHER_nid(const EVP_CIPHER *cipher)
 289 {
 290     return cipher->nid;
 291 }
 292
 293 int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx)
 294 {
 295     return ctx->cipher->nid;
 296 }
 297
 298 int EVP_MD_block_size(const EVP_MD *md)
 299 {
 300     return md->block_size;
 301 }
 302
 303 int EVP_MD_type(const EVP_MD *md)
 304 {
 305     return md->type;
 306 }
 307
 308 int EVP_MD_pkey_type(const EVP_MD *md)
 309 {
 310     return md->pkey_type;
 311 }
 312
 313 int EVP_MD_size(const EVP_MD *md)
 314 {
 315     if (!md) {
 316         EVPerr(EVP_F_EVP_MD_SIZE, EVP_R_MESSAGE_DIGEST_IS_NULL);
 317         return -1;
 318     }
 319     return md->md_size;
 320 }
 321
 322 unsigned long EVP_MD_flags(const EVP_MD *md)
 323 {
 324     return md->flags;
 325 }
 326
 327 EVP_MD *EVP_MD_meth_new(int md_type, int pkey_type)
 328 {
 329     EVP_MD *md = OPENSSL_zalloc(sizeof(*md));
 330
 331     if (md != NULL) {
 332         md->type = md_type;
 333         md->pkey_type = pkey_type;
 334     }
 335     return md;
 336 }
 337 EVP_MD *EVP_MD_meth_dup(const EVP_MD *md)
 338 {
 339     EVP_MD *to = EVP_MD_meth_new(md->type, md->pkey_type);
 340
 341     if (to != NULL)
 342         memcpy(to, md, sizeof(*to));
 343     return to;
 344 }
 345 void EVP_MD_meth_free(EVP_MD *md)
 346 {
 347     OPENSSL_free(md);
 348 }
 349 int EVP_MD_meth_set_input_blocksize(EVP_MD *md, int blocksize)
 350 {
 351     md->block_size = blocksize;
 352     return 1;
 353 }
 354 int EVP_MD_meth_set_result_size(EVP_MD *md, int resultsize)
 355 {
 356     md->md_size = resultsize;
 357     return 1;
 358 }
 359 int EVP_MD_meth_set_app_datasize(EVP_MD *md, int datasize)
 360 {
 361     md->ctx_size = datasize;
 362     return 1;
 363 }
 364 int EVP_MD_meth_set_flags(EVP_MD *md, unsigned long flags)
 365 {
 366     md->flags = flags;
 367     return 1;
 368 }
 369 int EVP_MD_meth_set_init(EVP_MD *md, int (*init)(EVP_MD_CTX *ctx))
 370 {
 371     md->init = init;
 372     return 1;
 373 }
 374 int EVP_MD_meth_set_update(EVP_MD *md, int (*update)(EVP_MD_CTX *ctx,
 375                                                      const void *data,
 376                                                      size_t count))
 377 {
 378     md->update = update;
 379     return 1;
 380 }
 381 int EVP_MD_meth_set_final(EVP_MD *md, int (*final)(EVP_MD_CTX *ctx,
 382                                                    unsigned char *md))
 383 {
 384     md->final = final;
 385     return 1;
 386 }
 387 int EVP_MD_meth_set_copy(EVP_MD *md, int (*copy)(EVP_MD_CTX *to,
 388                                                  const EVP_MD_CTX *from))
 389 {
 390     md->copy = copy;
 391     return 1;
 392 }
 393 int EVP_MD_meth_set_cleanup(EVP_MD *md, int (*cleanup)(EVP_MD_CTX *ctx))
 394 {
 395     md->cleanup = cleanup;
 396     return 1;
 397 }
 398 int EVP_MD_meth_set_ctrl(EVP_MD *md, int (*ctrl)(EVP_MD_CTX *ctx, int cmd,
 399                                                  int p1, void *p2))
 400 {
 401     md->md_ctrl = ctrl;
 402     return 1;
 403 }
 404
 405 int EVP_MD_meth_get_input_blocksize(const EVP_MD *md)
 406 {
 407     return md->block_size;
 408 }
 409 int EVP_MD_meth_get_result_size(const EVP_MD *md)
 410 {
 411     return md->md_size;
 412 }
 413 int EVP_MD_meth_get_app_datasize(const EVP_MD *md)
 414 {
 415     return md->ctx_size;
 416 }
 417 unsigned long EVP_MD_meth_get_flags(const EVP_MD *md)
 418 {
 419     return md->flags;
 420 }
 421 int (*EVP_MD_meth_get_init(const EVP_MD *md))(EVP_MD_CTX *ctx)
 422 {
 423     return md->init;
 424 }
 425 int (*EVP_MD_meth_get_update(const EVP_MD *md))(EVP_MD_CTX *ctx,
 426                                                 const void *data,
 427                                                 size_t count)
 428 {
 429     return md->update;
 430 }
 431 int (*EVP_MD_meth_get_final(const EVP_MD *md))(EVP_MD_CTX *ctx,
 432                                                unsigned char *md)
 433 {
 434     return md->final;
 435 }
 436 int (*EVP_MD_meth_get_copy(const EVP_MD *md))(EVP_MD_CTX *to,
 437                                               const EVP_MD_CTX *from)
 438 {
 439     return md->copy;
 440 }
 441 int (*EVP_MD_meth_get_cleanup(const EVP_MD *md))(EVP_MD_CTX *ctx)
 442 {
 443     return md->cleanup;
 444 }
 445 int (*EVP_MD_meth_get_ctrl(const EVP_MD *md))(EVP_MD_CTX *ctx, int cmd,
 446                                               int p1, void *p2)
 447 {
 448     return md->md_ctrl;
 449 }
 450
 451 const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx)
 452 {
 453     if (!ctx)
 454         return NULL;
 455     return ctx->digest;
 456 }
 457
 458 EVP_PKEY_CTX *EVP_MD_CTX_pkey_ctx(const EVP_MD_CTX *ctx)
 459 {
 460     return ctx->pctx;
 461 }
 462
 463 void *EVP_MD_CTX_md_data(const EVP_MD_CTX *ctx)
 464 {
 465     return ctx->md_data;
 466 }
 467
 468 int (*EVP_MD_CTX_update_fn(EVP_MD_CTX *ctx))(EVP_MD_CTX *ctx,
 469                                              const void *data, size_t count)
 470 {
 471     return ctx->update;
 472 }
 473
 474 void EVP_MD_CTX_set_update_fn(EVP_MD_CTX *ctx,
 475                               int (*update) (EVP_MD_CTX *ctx,
 476                                              const void *data, size_t count))
 477 {
 478     ctx->update = update;
 479 }
 480
 481 void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags)
 482 {
 483     ctx->flags |= flags;
 484 }
 485
 486 void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags)
 487 {
 488     ctx->flags &= ~flags;
 489 }
 490
 491 int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags)
 492 {
 493     return (ctx->flags & flags);
 494 }
 495
 496 void EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags)
 497 {
 498     ctx->flags |= flags;
 499 }
 500
 501 void EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags)
 502 {
 503     ctx->flags &= ~flags;
 504 }
 505
 506 int EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags)
 507 {
 508     return (ctx->flags & flags);
 509 }