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