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
  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);
  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         }