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 switch (EVP_CIPHER_CTX_mode(c)) { 76 case EVP_CIPH_WRAP_MODE: 77 if (EVP_CIPHER_CTX_nid(c) == NID_id_smime_alg_CMS3DESwrap) 78 ASN1_TYPE_set(type, V_ASN1_NULL, NULL); 79 ret = 1; 80 break; 81 82 case EVP_CIPH_GCM_MODE: 83 case EVP_CIPH_CCM_MODE: 84 case EVP_CIPH_XTS_MODE: 85 ret = -1; 86 break; 87 88 default: 89 ret = EVP_CIPHER_set_asn1_iv(c, type); 90 } 91 } else 92 ret = -1; 93 return (ret); 94} 95 96int EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type) 97{ 98 int ret; 99 100 if (c->cipher->get_asn1_parameters != NULL) 101 ret = c->cipher->get_asn1_parameters(c, type); 102 else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) { 103 switch (EVP_CIPHER_CTX_mode(c)) { 104 105 case EVP_CIPH_WRAP_MODE: 106 ret = 1; 107 break; 108 109 case EVP_CIPH_GCM_MODE: 110 case EVP_CIPH_CCM_MODE: 111 case EVP_CIPH_XTS_MODE: 112 ret = -1; 113 break; 114 115 default: 116 ret = EVP_CIPHER_get_asn1_iv(c, type); 117 break; 118 } 119 } else 120 ret = -1; 121 return (ret); 122} 123 124int EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type) 125{ 126 int i = 0; 127 unsigned int l; 128 129 if (type != NULL) { 130 l = EVP_CIPHER_CTX_iv_length(c); 131 OPENSSL_assert(l <= sizeof(c->iv)); 132 i = ASN1_TYPE_get_octetstring(type, c->oiv, l); 133 if (i != (int)l) 134 return (-1); 135 else if (i > 0) 136 memcpy(c->iv, c->oiv, l); 137 } 138 return (i); 139} 140 141int EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type) 142{ 143 int i = 0; 144 unsigned int j; 145 146 if (type != NULL) { 147 j = EVP_CIPHER_CTX_iv_length(c); 148 OPENSSL_assert(j <= sizeof(c->iv)); 149 i = ASN1_TYPE_set_octetstring(type, c->oiv, j); 150 } 151 return (i); 152} 153 154/* Convert the various cipher NIDs and dummies to a proper OID NID */ 155int EVP_CIPHER_type(const EVP_CIPHER *ctx) 156{ 157 int nid; 158 ASN1_OBJECT *otmp; 159 nid = EVP_CIPHER_nid(ctx); 160 161 switch (nid) { 162 163 case NID_rc2_cbc: 164 case NID_rc2_64_cbc: 165 case NID_rc2_40_cbc: 166 167 return NID_rc2_cbc; 168 169 case NID_rc4: 170 case NID_rc4_40: 171 172 return NID_rc4; 173 174 case NID_aes_128_cfb128: 175 case NID_aes_128_cfb8: 176 case NID_aes_128_cfb1: 177 178 return NID_aes_128_cfb128; 179 180 case NID_aes_192_cfb128: 181 case NID_aes_192_cfb8: 182 case NID_aes_192_cfb1: 183 184 return NID_aes_192_cfb128; 185 186 case NID_aes_256_cfb128: 187 case NID_aes_256_cfb8: 188 case NID_aes_256_cfb1: 189 190 return NID_aes_256_cfb128; 191 192 case NID_des_cfb64: 193 case NID_des_cfb8: 194 case NID_des_cfb1: 195 196 return NID_des_cfb64; 197 198 case NID_des_ede3_cfb64: 199 case NID_des_ede3_cfb8: 200 case NID_des_ede3_cfb1: 201 202 return NID_des_cfb64; 203 204 default: 205 /* Check it has an OID and it is valid */ 206 otmp = OBJ_nid2obj(nid); 207 if (!otmp || !otmp->data) 208 nid = NID_undef; 209 ASN1_OBJECT_free(otmp); 210 return nid; 211 } 212} 213 214int EVP_CIPHER_block_size(const EVP_CIPHER *e) 215{ 216 return e->block_size; 217} 218 219int EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx) 220{ 221 return ctx->cipher->block_size; 222} 223 224int EVP_Cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 225 const unsigned char *in, unsigned int inl) 226{ 227 return ctx->cipher->do_cipher(ctx, out, in, inl); 228} 229 230const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx) 231{ 232 return ctx->cipher; 233} 234 235unsigned long EVP_CIPHER_flags(const EVP_CIPHER *cipher) 236{ 237#ifdef OPENSSL_FIPS 238 const EVP_CIPHER *fcipher; 239 fcipher = evp_get_fips_cipher(cipher); 240 if (fcipher && fcipher->flags & EVP_CIPH_FLAG_FIPS) 241 return cipher->flags | EVP_CIPH_FLAG_FIPS; 242#endif 243 return cipher->flags; 244} 245 246unsigned long EVP_CIPHER_CTX_flags(const EVP_CIPHER_CTX *ctx) 247{ 248#ifdef OPENSSL_FIPS 249 return EVP_CIPHER_flags(ctx->cipher); 250#else 251 return ctx->cipher->flags; 252#endif 253} 254 255void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx) 256{ 257 return ctx->app_data; 258} 259 260void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data) 261{ 262 ctx->app_data = data; 263} 264 265int EVP_CIPHER_iv_length(const EVP_CIPHER *cipher) 266{ 267 return cipher->iv_len; 268} 269 270int EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx) 271{ 272 return ctx->cipher->iv_len; 273} 274 275int EVP_CIPHER_key_length(const EVP_CIPHER *cipher) 276{ 277 return cipher->key_len; 278} 279 280int EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx) 281{ 282 return ctx->key_len; 283} 284 285int EVP_CIPHER_nid(const EVP_CIPHER *cipher) 286{ 287 return cipher->nid; 288} 289 290int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx) 291{ 292 return ctx->cipher->nid; 293} 294 295int EVP_MD_block_size(const EVP_MD *md) 296{ 297 return md->block_size; 298} 299 300int EVP_MD_type(const EVP_MD *md) 301{ 302 return md->type; 303} 304 305int EVP_MD_pkey_type(const EVP_MD *md) 306{ 307 return md->pkey_type; 308} 309 310int EVP_MD_size(const EVP_MD *md) 311{ 312 if (!md) { 313 EVPerr(EVP_F_EVP_MD_SIZE, EVP_R_MESSAGE_DIGEST_IS_NULL); 314 return -1; 315 } 316 return md->md_size; 317} 318 319#ifdef OPENSSL_FIPS 320 321const EVP_MD *evp_get_fips_md(const EVP_MD *md) 322{ 323 int nid = EVP_MD_type(md); 324 if (nid == NID_dsa) 325 return FIPS_evp_dss1(); 326 else if (nid == NID_dsaWithSHA) 327 return FIPS_evp_dss(); 328 else if (nid == NID_ecdsa_with_SHA1) 329 return FIPS_evp_ecdsa(); 330 else 331 return FIPS_get_digestbynid(nid); 332} 333 334const EVP_CIPHER *evp_get_fips_cipher(const EVP_CIPHER *cipher) 335{ 336 int nid = cipher->nid; 337 if (nid == NID_undef) 338 return FIPS_evp_enc_null(); 339 else 340 return FIPS_get_cipherbynid(nid); 341} 342 343#endif 344 345unsigned long EVP_MD_flags(const EVP_MD *md) 346{ 347#ifdef OPENSSL_FIPS 348 const EVP_MD *fmd; 349 fmd = evp_get_fips_md(md); 350 if (fmd && fmd->flags & EVP_MD_FLAG_FIPS) 351 return md->flags | EVP_MD_FLAG_FIPS; 352#endif 353 return md->flags; 354} 355 356const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx) 357{ 358 if (!ctx) 359 return NULL; 360 return ctx->digest; 361} 362 363void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags) 364{ 365 ctx->flags |= flags; 366} 367 368void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags) 369{ 370 ctx->flags &= ~flags; 371} 372 373int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags) 374{ 375 return (ctx->flags & flags); 376} 377 378void EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags) 379{ 380 ctx->flags |= flags; 381} 382 383void EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags) 384{ 385 ctx->flags &= ~flags; 386} 387 388int EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags) 389{ 390 return (ctx->flags & flags); 391} 392