crypto/evp/e_des.c

   1 /* crypto/evp/e_des.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 #ifndef NO_DES
  60 #include <stdio.h>
  61 #include "cryptlib.h"
  62 #include <openssl/evp.h>
  63 #include <openssl/objects.h>
  64 #include "evp_locl.h"
  65
  66 static int des_init_key(EVP_CIPHER_CTX *ctx, unsigned char *key,
  67         unsigned char *iv,int enc);
  68
  69 /* Because of various casts and different names can't use IMPLEMENT_BLOCK_CIPHER */
  70
  71 static int des_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, unsigned char *in, unsigned int inl)
  72 {
  73         BLOCK_CIPHER_ecb_loop()
  74                 des_ecb_encrypt((des_cblock *)(in + i), (des_cblock *)(out + i), ctx->c.des_ks, ctx->encrypt);
  75         return 1;
  76 }
  77
  78 static int des_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, unsigned char *in, unsigned int inl)
  79 {
  80         des_ofb64_encrypt(in, out, (long)inl, ctx->c.des_ks, (des_cblock *)ctx->iv, &ctx->num);
  81         return 1;
  82 }
  83
  84 static int des_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, unsigned char *in, unsigned int inl)
  85 {
  86         des_ncbc_encrypt(in, out, (long)inl, ctx->c.des_ks, (des_cblock *)ctx->iv, ctx->encrypt);
  87         return 1;
  88 }
  89
  90 static int des_cfb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, unsigned char *in, unsigned int inl)
  91 {
  92         des_cfb64_encrypt(in, out, (long)inl, ctx->c.des_ks, (des_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
  93         return 1;
  94 }
  95
  96 BLOCK_CIPHER_defs(des, des_ks, NID_des, 8, 8, 8,
  97                         0, des_init_key, NULL,
  98                         EVP_CIPHER_set_asn1_iv,
  99                         EVP_CIPHER_get_asn1_iv,
 100                         NULL)
 101
 102
 103 static int des_init_key(EVP_CIPHER_CTX *ctx, unsigned char *key,
 104              unsigned char *iv, int enc)
 105         {
 106         des_cblock *deskey = (des_cblock *)key;
 107
 108         des_set_key_unchecked(deskey,ctx->c.des_ks);
 109         return 1;
 110         }
 111
 112 #endif