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

   1 /* crypto/evp/evp_lib.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 #include <openssl/evp.h>
  62 #include <openssl/objects.h>
  63 #ifdef OPENSSL_FIPS
  64 # include <openssl/fips.h>
  65 # include "evp_locl.h"
  66 #endif
  67
  68 int EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
  69 {
  70     int ret;
  71
  72     if (c->cipher->set_asn1_parameters != NULL)
  73         ret = c->cipher->set_asn1_parameters(c, type);
  74     else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) {
  75         if (EVP_CIPHER_CTX_mode(c) == EVP_CIPH_WRAP_MODE) {
  76             ASN1_TYPE_set(type, V_ASN1_NULL, NULL);
  77             ret = 1;
  78         } else
  79             ret = EVP_CIPHER_set_asn1_iv(c, type);
  80     } else
  81         ret = -1;
  82     return (ret);
  83 }
  84
  85 int EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
  86 {
  87     int ret;
  88
  89     if (c->cipher->get_asn1_parameters != NULL)
  90         ret = c->cipher->get_asn1_parameters(c, type);
  91     else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) {
  92         if (EVP_CIPHER_CTX_mode(c) == EVP_CIPH_WRAP_MODE)
  93             return 1;
  94         ret = EVP_CIPHER_get_asn1_iv(c, type);
  95     } else
  96         ret = -1;
  97     return (ret);
  98 }
  99
 100 int EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
 101 {
 102     int i = 0;
 103     unsigned int l;
 104
 105     if (type != NULL) {
 106         l = EVP_CIPHER_CTX_iv_length(c);
 107         OPENSSL_assert(l <= sizeof(c->iv));
 108         i = ASN1_TYPE_get_octetstring(type, c->oiv, l);
 109         if (i != (int)l)
 110             return (-1);
 111         else if (i > 0)
 112             memcpy(c->iv, c->oiv, l);
 113     }
 114     return (i);
 115 }
 116
 117 int EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
 118 {
 119     int i = 0;
 120     unsigned int j;
 121
 122     if (type != NULL) {
 123         j = EVP_CIPHER_CTX_iv_length(c);
 124         OPENSSL_assert(j <= sizeof(c->iv));
 125         i = ASN1_TYPE_set_octetstring(type, c->oiv, j);
 126     }
 127     return (i);
 128 }
 129
 130 /* Convert the various cipher NIDs and dummies to a proper OID NID */
 131 int EVP_CIPHER_type(const EVP_CIPHER *ctx)
 132 {
 133     int nid;
 134     ASN1_OBJECT *otmp;
 135     nid = EVP_CIPHER_nid(ctx);
 136
 137     switch (nid) {
 138
 139     case NID_rc2_cbc:
 140     case NID_rc2_64_cbc:
 141     case NID_rc2_40_cbc:
 142
 143         return NID_rc2_cbc;
 144
 145     case NID_rc4:
 146     case NID_rc4_40:
 147
 148         return NID_rc4;
 149
 150     case NID_aes_128_cfb128:
 151     case NID_aes_128_cfb8:
 152     case NID_aes_128_cfb1:
 153
 154         return NID_aes_128_cfb128;
 155
 156     case NID_aes_192_cfb128:
 157     case NID_aes_192_cfb8:
 158     case NID_aes_192_cfb1:
 159
 160         return NID_aes_192_cfb128;
 161
 162     case NID_aes_256_cfb128:
 163     case NID_aes_256_cfb8:
 164     case NID_aes_256_cfb1:
 165
 166         return NID_aes_256_cfb128;
 167
 168     case NID_des_cfb64:
 169     case NID_des_cfb8:
 170     case NID_des_cfb1:
 171
 172         return NID_des_cfb64;
 173
 174     case NID_des_ede3_cfb64:
 175     case NID_des_ede3_cfb8:
 176     case NID_des_ede3_cfb1:
 177
 178         return NID_des_cfb64;
 179
 180     default:
 181         /* Check it has an OID and it is valid */
 182         otmp = OBJ_nid2obj(nid);
 183         if (!otmp || !otmp->data)
 184             nid = NID_undef;
 185         ASN1_OBJECT_free(otmp);
 186         return nid;
 187     }
 188 }
 189
 190 int EVP_CIPHER_block_size(const EVP_CIPHER *e)
 191 {
 192     return e->block_size;
 193 }
 194
 195 int EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx)
 196 {
 197     return ctx->cipher->block_size;
 198 }
 199
 200 int EVP_Cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 201                const unsigned char *in, unsigned int inl)
 202 {
 203     return ctx->cipher->do_cipher(ctx, out, in, inl);
 204 }
 205
 206 const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx)
 207 {
 208     return ctx->cipher;
 209 }
 210
 211 unsigned long EVP_CIPHER_flags(const EVP_CIPHER *cipher)
 212 {
 213 #ifdef OPENSSL_FIPS
 214     const EVP_CIPHER *fcipher;
 215     fcipher = evp_get_fips_cipher(cipher);
 216     if (fcipher && fcipher->flags & EVP_CIPH_FLAG_FIPS)
 217         return cipher->flags | EVP_CIPH_FLAG_FIPS;
 218 #endif
 219     return cipher->flags;
 220 }
 221
 222 unsigned long EVP_CIPHER_CTX_flags(const EVP_CIPHER_CTX *ctx)
 223 {
 224 #ifdef OPENSSL_FIPS
 225     return EVP_CIPHER_flags(ctx->cipher);
 226 #else
 227     return ctx->cipher->flags;
 228 #endif
 229 }
 230
 231 void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx)
 232 {
 233     return ctx->app_data;
 234 }
 235
 236 void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data)
 237 {
 238     ctx->app_data = data;
 239 }
 240
 241 int EVP_CIPHER_iv_length(const EVP_CIPHER *cipher)
 242 {
 243     return cipher->iv_len;
 244 }
 245
 246 int EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx)
 247 {
 248     return ctx->cipher->iv_len;
 249 }
 250
 251 int EVP_CIPHER_key_length(const EVP_CIPHER *cipher)
 252 {
 253     return cipher->key_len;
 254 }
 255
 256 int EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx)
 257 {
 258     return ctx->key_len;
 259 }
 260
 261 int EVP_CIPHER_nid(const EVP_CIPHER *cipher)
 262 {
 263     return cipher->nid;
 264 }
 265
 266 int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx)
 267 {
 268     return ctx->cipher->nid;
 269 }
 270
 271 int EVP_MD_block_size(const EVP_MD *md)
 272 {
 273     return md->block_size;
 274 }
 275
 276 int EVP_MD_type(const EVP_MD *md)
 277 {
 278     return md->type;
 279 }
 280
 281 int EVP_MD_pkey_type(const EVP_MD *md)
 282 {
 283     return md->pkey_type;
 284 }
 285
 286 int EVP_MD_size(const EVP_MD *md)
 287 {
 288     if (!md) {
 289         EVPerr(EVP_F_EVP_MD_SIZE, EVP_R_MESSAGE_DIGEST_IS_NULL);
 290         return -1;
 291     }
 292     return md->md_size;
 293 }
 294
 295 #ifdef OPENSSL_FIPS
 296
 297 const EVP_MD *evp_get_fips_md(const EVP_MD *md)
 298 {
 299     int nid = EVP_MD_type(md);
 300     if (nid == NID_dsa)
 301         return FIPS_evp_dss1();
 302     else if (nid == NID_dsaWithSHA)
 303         return FIPS_evp_dss();
 304     else if (nid == NID_ecdsa_with_SHA1)
 305         return FIPS_evp_ecdsa();
 306     else
 307         return FIPS_get_digestbynid(nid);
 308 }
 309
 310 const EVP_CIPHER *evp_get_fips_cipher(const EVP_CIPHER *cipher)
 311 {
 312     int nid = cipher->nid;
 313     if (nid == NID_undef)
 314         return FIPS_evp_enc_null();
 315     else
 316         return FIPS_get_cipherbynid(nid);
 317 }
 318
 319 #endif
 320
 321 unsigned long EVP_MD_flags(const EVP_MD *md)
 322 {
 323 #ifdef OPENSSL_FIPS
 324     const EVP_MD *fmd;
 325     fmd = evp_get_fips_md(md);
 326     if (fmd && fmd->flags & EVP_MD_FLAG_FIPS)
 327         return md->flags | EVP_MD_FLAG_FIPS;
 328 #endif
 329     return md->flags;
 330 }
 331
 332 const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx)
 333 {
 334     if (!ctx)
 335         return NULL;
 336     return ctx->digest;
 337 }
 338
 339 void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags)
 340 {
 341     ctx->flags |= flags;
 342 }
 343
 344 void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags)
 345 {
 346     ctx->flags &= ~flags;
 347 }
 348
 349 int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags)
 350 {
 351     return (ctx->flags & flags);
 352 }
 353
 354 void EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags)
 355 {
 356     ctx->flags |= flags;
 357 }
 358
 359 void EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags)
 360 {
 361     ctx->flags &= ~flags;
 362 }
 363
 364 int EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags)
 365 {
 366     return (ctx->flags & flags);
 367 }