1 /* $OpenBSD: evp_lib.c,v 1.13 2014/07/11 08:44:48 jsing Exp $ */ 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 <string.h> 61 62 #include <openssl/err.h> 63 #include <openssl/evp.h> 64 #include <openssl/objects.h> 65 66 int 67 EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type) 68 { 69 int ret; 70 71 if (c->cipher->set_asn1_parameters != NULL) 72 ret = c->cipher->set_asn1_parameters(c, type); 73 else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) 74 ret = EVP_CIPHER_set_asn1_iv(c, type); 75 else 76 ret = -1; 77 return (ret); 78 } 79 80 int 81 EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type) 82 { 83 int ret; 84 85 if (c->cipher->get_asn1_parameters != NULL) 86 ret = c->cipher->get_asn1_parameters(c, type); 87 else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) 88 ret = EVP_CIPHER_get_asn1_iv(c, type); 89 else 90 ret = -1; 91 return (ret); 92 } 93 94 int 95 EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type) 96 { 97 int i = 0; 98 unsigned int l; 99 100 if (type != NULL) { 101 l = EVP_CIPHER_CTX_iv_length(c); 102 if (l > sizeof(c->iv)) { 103 EVPerr(EVP_F_EVP_CIPHER_GET_ASN1_IV, 104 EVP_R_IV_TOO_LARGE); 105 return 0; 106 } 107 i = ASN1_TYPE_get_octetstring(type, c->oiv, l); 108 if (i != (int)l) 109 return (-1); 110 else if (i > 0) 111 memcpy(c->iv, c->oiv, l); 112 } 113 return (i); 114 } 115 116 int 117 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 if (j > sizeof(c->iv)) { 125 EVPerr(EVP_F_EVP_CIPHER_SET_ASN1_IV, 126 EVP_R_IV_TOO_LARGE); 127 return 0; 128 } 129 i = ASN1_TYPE_set_octetstring(type, c->oiv, j); 130 } 131 return (i); 132 } 133 134 /* Convert the various cipher NIDs and dummies to a proper OID NID */ 135 int 136 EVP_CIPHER_type(const EVP_CIPHER *ctx) 137 { 138 int nid; 139 ASN1_OBJECT *otmp; 140 nid = EVP_CIPHER_nid(ctx); 141 142 switch (nid) { 143 case NID_rc2_cbc: 144 case NID_rc2_64_cbc: 145 case NID_rc2_40_cbc: 146 return NID_rc2_cbc; 147 148 case NID_rc4: 149 case NID_rc4_40: 150 return NID_rc4; 151 152 case NID_aes_128_cfb128: 153 case NID_aes_128_cfb8: 154 case NID_aes_128_cfb1: 155 return NID_aes_128_cfb128; 156 157 case NID_aes_192_cfb128: 158 case NID_aes_192_cfb8: 159 case NID_aes_192_cfb1: 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 return NID_aes_256_cfb128; 166 167 case NID_des_cfb64: 168 case NID_des_cfb8: 169 case NID_des_cfb1: 170 return NID_des_cfb64; 171 172 case NID_des_ede3_cfb64: 173 case NID_des_ede3_cfb8: 174 case NID_des_ede3_cfb1: 175 return NID_des_cfb64; 176 177 default: 178 /* Check it has an OID and it is valid */ 179 otmp = OBJ_nid2obj(nid); 180 if (!otmp || !otmp->data) 181 nid = NID_undef; 182 ASN1_OBJECT_free(otmp); 183 return nid; 184 } 185 } 186 187 int 188 EVP_CIPHER_block_size(const EVP_CIPHER *e) 189 { 190 return e->block_size; 191 } 192 193 int 194 EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx) 195 { 196 return ctx->cipher->block_size; 197 } 198 199 int 200 EVP_Cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, 201 unsigned int inl) 202 { 203 return ctx->cipher->do_cipher(ctx, out, in, inl); 204 } 205 206 const EVP_CIPHER * 207 EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx) 208 { 209 return ctx->cipher; 210 } 211 212 unsigned long 213 EVP_CIPHER_flags(const EVP_CIPHER *cipher) 214 { 215 return cipher->flags; 216 } 217 218 unsigned long 219 EVP_CIPHER_CTX_flags(const EVP_CIPHER_CTX *ctx) 220 { 221 return ctx->cipher->flags; 222 } 223 224 void * 225 EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx) 226 { 227 return ctx->app_data; 228 } 229 230 void 231 EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data) 232 { 233 ctx->app_data = data; 234 } 235 236 int 237 EVP_CIPHER_iv_length(const EVP_CIPHER *cipher) 238 { 239 return cipher->iv_len; 240 } 241 242 int 243 EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx) 244 { 245 return ctx->cipher->iv_len; 246 } 247 248 int 249 EVP_CIPHER_key_length(const EVP_CIPHER *cipher) 250 { 251 return cipher->key_len; 252 } 253 254 int 255 EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx) 256 { 257 return ctx->key_len; 258 } 259 260 int 261 EVP_CIPHER_nid(const EVP_CIPHER *cipher) 262 { 263 return cipher->nid; 264 } 265 266 int 267 EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx) 268 { 269 return ctx->cipher->nid; 270 } 271 272 int 273 EVP_MD_block_size(const EVP_MD *md) 274 { 275 return md->block_size; 276 } 277 278 int 279 EVP_MD_type(const EVP_MD *md) 280 { 281 return md->type; 282 } 283 284 int 285 EVP_MD_pkey_type(const EVP_MD *md) 286 { 287 return md->pkey_type; 288 } 289 290 int 291 EVP_MD_size(const EVP_MD *md) 292 { 293 if (!md) { 294 EVPerr(EVP_F_EVP_MD_SIZE, EVP_R_MESSAGE_DIGEST_IS_NULL); 295 return -1; 296 } 297 return md->md_size; 298 } 299 300 unsigned long 301 EVP_MD_flags(const EVP_MD *md) 302 { 303 return md->flags; 304 } 305 306 const EVP_MD * 307 EVP_MD_CTX_md(const EVP_MD_CTX *ctx) 308 { 309 if (!ctx) 310 return NULL; 311 return ctx->digest; 312 } 313 314 void 315 EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags) 316 { 317 ctx->flags |= flags; 318 } 319 320 void 321 EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags) 322 { 323 ctx->flags &= ~flags; 324 } 325 326 int 327 EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags) 328 { 329 return (ctx->flags & flags); 330 } 331 332 void 333 EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags) 334 { 335 ctx->flags |= flags; 336 } 337 338 void 339 EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags) 340 { 341 ctx->flags &= ~flags; 342 } 343 344 int 345 EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags) 346 { 347 return (ctx->flags & flags); 348 } 349