Line data    Source code

       1             : /* crypto/evp/e_idea.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             : 
      62             : #ifndef OPENSSL_NO_IDEA
      63             : # include <openssl/evp.h>
      64             : # include <openssl/objects.h>
      65             : # include "evp_locl.h"
      66             : # include <openssl/idea.h>
      67             : 
      68             : static int idea_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
      69             :                          const unsigned char *iv, int enc);
      70             : 
      71             : /*
      72             :  * NB idea_ecb_encrypt doesn't take an 'encrypt' argument so we treat it as a
      73             :  * special case
      74             :  */
      75             : 
      76           0 : static int idea_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
      77             :                            const unsigned char *in, size_t inl)
      78             : {
      79           0 :     BLOCK_CIPHER_ecb_loop()
      80           0 :         idea_ecb_encrypt(in + i, out + i, ctx->cipher_data);
      81             :     return 1;
      82             : }
      83             : 
      84             : /* Can't use IMPLEMENT_BLOCK_CIPHER because idea_ecb_encrypt is different */
      85             : 
      86             : typedef struct {
      87             :     IDEA_KEY_SCHEDULE ks;
      88             : } EVP_IDEA_KEY;
      89             : 
      90           0 : BLOCK_CIPHER_func_cbc(idea, idea, EVP_IDEA_KEY, ks)
      91           0 :     BLOCK_CIPHER_func_ofb(idea, idea, 64, EVP_IDEA_KEY, ks)
      92           0 :     BLOCK_CIPHER_func_cfb(idea, idea, 64, EVP_IDEA_KEY, ks)
      93             : 
      94         605 :     BLOCK_CIPHER_defs(idea, IDEA_KEY_SCHEDULE, NID_idea, 8, 16, 8, 64,
      95             :                   0, idea_init_key, NULL,
      96             :                   EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, NULL)
      97             : 
      98           0 : static int idea_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
      99             :                          const unsigned char *iv, int enc)
     100             : {
     101           0 :     if (!enc) {
     102           0 :         if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_OFB_MODE)
     103             :             enc = 1;
     104           0 :         else if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_CFB_MODE)
     105             :             enc = 1;
     106             :     }
     107           0 :     if (enc)
     108           0 :         idea_set_encrypt_key(key, ctx->cipher_data);
     109             :     else {
     110             :         IDEA_KEY_SCHEDULE tmp;
     111             : 
     112           0 :         idea_set_encrypt_key(key, &tmp);
     113           0 :         idea_set_decrypt_key(&tmp, ctx->cipher_data);
     114           0 :         OPENSSL_cleanse((unsigned char *)&tmp, sizeof(IDEA_KEY_SCHEDULE));
     115             :     }
     116           0 :     return 1;
     117             : }
     118             : 
     119             : #endif