Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 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 | |
| 64 | int 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); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 70 | else |
| 71 | ret=-1; |
| 72 | return(ret); |
| 73 | } |
| 74 | |
| 75 | int 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); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 81 | else |
| 82 | ret=-1; |
| 83 | return(ret); |
| 84 | } |
| 85 | |
| 86 | int 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 | |
| 104 | int 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 */ |
| 119 | int 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 | case NID_des_ede3_cfb64: |
| 163 | case NID_des_ede3_cfb8: |
| 164 | case NID_des_ede3_cfb1: |
| 165 | |
| 166 | return NID_des_cfb64; |
| 167 | |
| 168 | default: |
| 169 | /* Check it has an OID and it is valid */ |
| 170 | otmp = OBJ_nid2obj(nid); |
| 171 | if(!otmp || !otmp->data) nid = NID_undef; |
| 172 | ASN1_OBJECT_free(otmp); |
| 173 | return nid; |
| 174 | } |
| 175 | } |
| 176 | |
| 177 | int EVP_CIPHER_block_size(const EVP_CIPHER *e) |
| 178 | { |
| 179 | return e->block_size; |
| 180 | } |
| 181 | |
| 182 | int EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx) |
| 183 | { |
| 184 | return ctx->cipher->block_size; |
| 185 | } |
| 186 | |
| 187 | int EVP_Cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, unsigned int inl) |
| 188 | { |
| 189 | return ctx->cipher->do_cipher(ctx,out,in,inl); |
| 190 | } |
| 191 | |
| 192 | const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx) |
| 193 | { |
| 194 | return ctx->cipher; |
| 195 | } |
| 196 | |
| 197 | unsigned long EVP_CIPHER_flags(const EVP_CIPHER *cipher) |
| 198 | { |
| 199 | return cipher->flags; |
| 200 | } |
| 201 | |
| 202 | unsigned long EVP_CIPHER_CTX_flags(const EVP_CIPHER_CTX *ctx) |
| 203 | { |
| 204 | return ctx->cipher->flags; |
| 205 | } |
| 206 | |
| 207 | void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx) |
| 208 | { |
| 209 | return ctx->app_data; |
| 210 | } |
| 211 | |
| 212 | void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data) |
| 213 | { |
| 214 | ctx->app_data = data; |
| 215 | } |
| 216 | |
| 217 | int EVP_CIPHER_iv_length(const EVP_CIPHER *cipher) |
| 218 | { |
| 219 | return cipher->iv_len; |
| 220 | } |
| 221 | |
| 222 | int EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx) |
| 223 | { |
| 224 | return ctx->cipher->iv_len; |
| 225 | } |
| 226 | |
| 227 | int EVP_CIPHER_key_length(const EVP_CIPHER *cipher) |
| 228 | { |
| 229 | return cipher->key_len; |
| 230 | } |
| 231 | |
| 232 | int EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx) |
| 233 | { |
| 234 | return ctx->key_len; |
| 235 | } |
| 236 | |
| 237 | int EVP_CIPHER_nid(const EVP_CIPHER *cipher) |
| 238 | { |
| 239 | return cipher->nid; |
| 240 | } |
| 241 | |
| 242 | int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx) |
| 243 | { |
| 244 | return ctx->cipher->nid; |
| 245 | } |
| 246 | |
| 247 | int EVP_MD_block_size(const EVP_MD *md) |
| 248 | { |
| 249 | return md->block_size; |
| 250 | } |
| 251 | |
| 252 | int EVP_MD_type(const EVP_MD *md) |
| 253 | { |
| 254 | return md->type; |
| 255 | } |
| 256 | |
| 257 | int EVP_MD_pkey_type(const EVP_MD *md) |
| 258 | { |
| 259 | return md->pkey_type; |
| 260 | } |
| 261 | |
| 262 | int EVP_MD_size(const EVP_MD *md) |
| 263 | { |
| 264 | if (!md) |
| 265 | { |
| 266 | EVPerr(EVP_F_EVP_MD_SIZE, EVP_R_MESSAGE_DIGEST_IS_NULL); |
| 267 | return -1; |
| 268 | } |
| 269 | return md->md_size; |
| 270 | } |
| 271 | |
| 272 | unsigned long EVP_MD_flags(const EVP_MD *md) |
| 273 | { |
| 274 | return md->flags; |
| 275 | } |
| 276 | |
| 277 | const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx) |
| 278 | { |
| 279 | if (!ctx) |
| 280 | return NULL; |
| 281 | return ctx->digest; |
| 282 | } |
| 283 | |
| 284 | void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags) |
| 285 | { |
| 286 | ctx->flags |= flags; |
| 287 | } |
| 288 | |
| 289 | void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags) |
| 290 | { |
| 291 | ctx->flags &= ~flags; |
| 292 | } |
| 293 | |
| 294 | int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags) |
| 295 | { |
| 296 | return (ctx->flags & flags); |
| 297 | } |
| 298 | |
| 299 | void EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags) |
| 300 | { |
| 301 | ctx->flags |= flags; |
| 302 | } |
| 303 | |
| 304 | void EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags) |
| 305 | { |
| 306 | ctx->flags &= ~flags; |
| 307 | } |
| 308 | |
| 309 | int EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags) |
| 310 | { |
| 311 | return (ctx->flags & flags); |
| 312 | } |