evp_lib.c revision 290207
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 68int 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 85int 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 100int 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 117int 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 */ 131int 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 190int EVP_CIPHER_block_size(const EVP_CIPHER *e) 191{ 192 return e->block_size; 193} 194 195int EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx) 196{ 197 return ctx->cipher->block_size; 198} 199 200int 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 206const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx) 207{ 208 return ctx->cipher; 209} 210 211unsigned 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 222unsigned 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 231void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx) 232{ 233 return ctx->app_data; 234} 235 236void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data) 237{ 238 ctx->app_data = data; 239} 240 241int EVP_CIPHER_iv_length(const EVP_CIPHER *cipher) 242{ 243 return cipher->iv_len; 244} 245 246int EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx) 247{ 248 return ctx->cipher->iv_len; 249} 250 251int EVP_CIPHER_key_length(const EVP_CIPHER *cipher) 252{ 253 return cipher->key_len; 254} 255 256int EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx) 257{ 258 return ctx->key_len; 259} 260 261int EVP_CIPHER_nid(const EVP_CIPHER *cipher) 262{ 263 return cipher->nid; 264} 265 266int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx) 267{ 268 return ctx->cipher->nid; 269} 270 271int EVP_MD_block_size(const EVP_MD *md) 272{ 273 return md->block_size; 274} 275 276int EVP_MD_type(const EVP_MD *md) 277{ 278 return md->type; 279} 280 281int EVP_MD_pkey_type(const EVP_MD *md) 282{ 283 return md->pkey_type; 284} 285 286int 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 297const 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 310const 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 321unsigned 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 332const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx) 333{ 334 if (!ctx) 335 return NULL; 336 return ctx->digest; 337} 338 339void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags) 340{ 341 ctx->flags |= flags; 342} 343 344void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags) 345{ 346 ctx->flags &= ~flags; 347} 348 349int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags) 350{ 351 return (ctx->flags & flags); 352} 353 354void EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags) 355{ 356 ctx->flags |= flags; 357} 358 359void EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags) 360{ 361 ctx->flags &= ~flags; 362} 363 364int EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags) 365{ 366 return (ctx->flags & flags); 367} 368