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