release/src/router/openssl/crypto/evp/evp_lib.c

   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);
  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
  77 int 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
  90 int 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
 107 int 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 */
 121 int 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
 180 int EVP_CIPHER_block_size(const EVP_CIPHER *e)
 181 {
 182     return e->block_size;
 183 }
 184
 185 int EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx)
 186 {
 187     return ctx->cipher->block_size;
 188 }
 189
 190 int 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
 196 const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx)
 197 {
 198     return ctx->cipher;
 199 }
 200
 201 unsigned long EVP_CIPHER_flags(const EVP_CIPHER *cipher)
 202 {
 203     return cipher->flags;
 204 }
 205
 206 unsigned long EVP_CIPHER_CTX_flags(const EVP_CIPHER_CTX *ctx)
 207 {
 208     return ctx->cipher->flags;
 209 }
 210
 211 void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx)
 212 {
 213     return ctx->app_data;
 214 }
 215
 216 void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data)
 217 {
 218     ctx->app_data = data;
 219 }
 220
 221 int EVP_CIPHER_iv_length(const EVP_CIPHER *cipher)
 222 {
 223     return cipher->iv_len;
 224 }
 225
 226 int EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx)
 227 {
 228     return ctx->cipher->iv_len;
 229 }
 230
 231 int EVP_CIPHER_key_length(const EVP_CIPHER *cipher)
 232 {
 233     return cipher->key_len;
 234 }
 235
 236 int EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx)
 237 {
 238     return ctx->key_len;
 239 }
 240
 241 int EVP_CIPHER_nid(const EVP_CIPHER *cipher)
 242 {
 243     return cipher->nid;
 244 }
 245
 246 int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx)
 247 {
 248     return ctx->cipher->nid;
 249 }
 250
 251 int EVP_MD_block_size(const EVP_MD *md)
 252 {
 253     return md->block_size;
 254 }
 255
 256 int EVP_MD_type(const EVP_MD *md)
 257 {
 258     return md->type;
 259 }
 260
 261 int EVP_MD_pkey_type(const EVP_MD *md)
 262 {
 263     return md->pkey_type;
 264 }
 265
 266 int 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
 275 unsigned long EVP_MD_flags(const EVP_MD *md)
 276 {
 277     return md->flags;
 278 }
 279
 280 const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx)
 281 {
 282     if (!ctx)
 283         return NULL;
 284     return ctx->digest;
 285 }
 286
 287 void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags)
 288 {
 289     ctx->flags |= flags;
 290 }
 291
 292 void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags)
 293 {
 294     ctx->flags &= ~flags;
 295 }
 296
 297 int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags)
 298 {
 299     return (ctx->flags & flags);
 300 }
 301
 302 void EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags)
 303 {
 304     ctx->flags |= flags;
 305 }
 306
 307 void EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags)
 308 {
 309     ctx->flags &= ~flags;
 310 }
 311
 312 int EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags)
 313 {
 314     return (ctx->flags & flags);
 315 }