evp_lib.c revision 296341
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 64int EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type) 65{ 66 int ret; 67 68 if (c->cipher->set_asn1_parameters != NULL) 69 ret = c->cipher->set_asn1_parameters(c, type); 70 else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) 71 ret = EVP_CIPHER_set_asn1_iv(c, type); 72 else 73 ret = -1; 74 return (ret); 75} 76 77int EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type) 78{ 79 int ret; 80 81 if (c->cipher->get_asn1_parameters != NULL) 82 ret = c->cipher->get_asn1_parameters(c, type); 83 else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) 84 ret = EVP_CIPHER_get_asn1_iv(c, type); 85 else 86 ret = -1; 87 return (ret); 88} 89 90int EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type) 91{ 92 int i = 0; 93 unsigned int l; 94 95 if (type != NULL) { 96 l = EVP_CIPHER_CTX_iv_length(c); 97 OPENSSL_assert(l <= sizeof(c->iv)); 98 i = ASN1_TYPE_get_octetstring(type, c->oiv, l); 99 if (i != (int)l) 100 return (-1); 101 else if (i > 0) 102 memcpy(c->iv, c->oiv, l); 103 } 104 return (i); 105} 106 107int EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type) 108{ 109 int i = 0; 110 unsigned int j; 111 112 if (type != NULL) { 113 j = EVP_CIPHER_CTX_iv_length(c); 114 OPENSSL_assert(j <= sizeof(c->iv)); 115 i = ASN1_TYPE_set_octetstring(type, c->oiv, j); 116 } 117 return (i); 118} 119 120/* Convert the various cipher NIDs and dummies to a proper OID NID */ 121int EVP_CIPHER_type(const EVP_CIPHER *ctx) 122{ 123 int nid; 124 ASN1_OBJECT *otmp; 125 nid = EVP_CIPHER_nid(ctx); 126 127 switch (nid) { 128 129 case NID_rc2_cbc: 130 case NID_rc2_64_cbc: 131 case NID_rc2_40_cbc: 132 133 return NID_rc2_cbc; 134 135 case NID_rc4: 136 case NID_rc4_40: 137 138 return NID_rc4; 139 140 case NID_aes_128_cfb128: 141 case NID_aes_128_cfb8: 142 case NID_aes_128_cfb1: 143 144 return NID_aes_128_cfb128; 145 146 case NID_aes_192_cfb128: 147 case NID_aes_192_cfb8: 148 case NID_aes_192_cfb1: 149 150 return NID_aes_192_cfb128; 151 152 case NID_aes_256_cfb128: 153 case NID_aes_256_cfb8: 154 case NID_aes_256_cfb1: 155 156 return NID_aes_256_cfb128; 157 158 case NID_des_cfb64: 159 case NID_des_cfb8: 160 case NID_des_cfb1: 161 162 return NID_des_cfb64; 163 164 case NID_des_ede3_cfb64: 165 case NID_des_ede3_cfb8: 166 case NID_des_ede3_cfb1: 167 168 return NID_des_cfb64; 169 170 default: 171 /* Check it has an OID and it is valid */ 172 otmp = OBJ_nid2obj(nid); 173 if (!otmp || !otmp->data) 174 nid = NID_undef; 175 ASN1_OBJECT_free(otmp); 176 return nid; 177 } 178} 179 180int EVP_CIPHER_block_size(const EVP_CIPHER *e) 181{ 182 return e->block_size; 183} 184 185int EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx) 186{ 187 return ctx->cipher->block_size; 188} 189 190int EVP_Cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 191 const unsigned char *in, unsigned int inl) 192{ 193 return ctx->cipher->do_cipher(ctx, out, in, inl); 194} 195 196const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx) 197{ 198 return ctx->cipher; 199} 200 201unsigned long EVP_CIPHER_flags(const EVP_CIPHER *cipher) 202{ 203 return cipher->flags; 204} 205 206unsigned long EVP_CIPHER_CTX_flags(const EVP_CIPHER_CTX *ctx) 207{ 208 return ctx->cipher->flags; 209} 210 211void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx) 212{ 213 return ctx->app_data; 214} 215 216void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data) 217{ 218 ctx->app_data = data; 219} 220 221int EVP_CIPHER_iv_length(const EVP_CIPHER *cipher) 222{ 223 return cipher->iv_len; 224} 225 226int EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx) 227{ 228 return ctx->cipher->iv_len; 229} 230 231int EVP_CIPHER_key_length(const EVP_CIPHER *cipher) 232{ 233 return cipher->key_len; 234} 235 236int EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx) 237{ 238 return ctx->key_len; 239} 240 241int EVP_CIPHER_nid(const EVP_CIPHER *cipher) 242{ 243 return cipher->nid; 244} 245 246int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx) 247{ 248 return ctx->cipher->nid; 249} 250 251int EVP_MD_block_size(const EVP_MD *md) 252{ 253 return md->block_size; 254} 255 256int EVP_MD_type(const EVP_MD *md) 257{ 258 return md->type; 259} 260 261int EVP_MD_pkey_type(const EVP_MD *md) 262{ 263 return md->pkey_type; 264} 265 266int EVP_MD_size(const EVP_MD *md) 267{ 268 if (!md) { 269 EVPerr(EVP_F_EVP_MD_SIZE, EVP_R_MESSAGE_DIGEST_IS_NULL); 270 return -1; 271 } 272 return md->md_size; 273} 274 275unsigned long EVP_MD_flags(const EVP_MD *md) 276{ 277 return md->flags; 278} 279 280const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx) 281{ 282 if (!ctx) 283 return NULL; 284 return ctx->digest; 285} 286 287void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags) 288{ 289 ctx->flags |= flags; 290} 291 292void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags) 293{ 294 ctx->flags &= ~flags; 295} 296 297int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags) 298{ 299 return (ctx->flags & flags); 300} 301 302void EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags) 303{ 304 ctx->flags |= flags; 305} 306 307void EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags) 308{ 309 ctx->flags &= ~flags; 310} 311 312int EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags) 313{ 314 return (ctx->flags & flags); 315} 316