1 /* crypto/evp/e_xcbc_d.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_DES
63
64 #include <openssl/evp.h>
65 #include <openssl/objects.h>
66 #include <openssl/des.h>
67
68 static int desx_cbc_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
69 const unsigned char *iv,int enc);
70 static int desx_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
71 const unsigned char *in, unsigned int inl);
72
73
74 typedef struct
75 {
76 DES_key_schedule ks;/* key schedule */
77 DES_cblock inw;
78 DES_cblock outw;
79 } DESX_CBC_KEY;
80
81 #define data(ctx) ((DESX_CBC_KEY *)(ctx)->cipher_data)
82
83 static const EVP_CIPHER d_xcbc_cipher=
84 {
85 NID_desx_cbc,
86 8,24,8,
87 EVP_CIPH_CBC_MODE,
88 desx_cbc_init_key,
89 desx_cbc_cipher,
90 NULL,
91 sizeof(DESX_CBC_KEY),
92 EVP_CIPHER_set_asn1_iv,
93 EVP_CIPHER_get_asn1_iv,
94 NULL,
95 NULL
96 };
97
EVP_desx_cbc(void)98 const EVP_CIPHER *EVP_desx_cbc(void)
99 {
100 return(&d_xcbc_cipher);
101 }
102
desx_cbc_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc)103 static int desx_cbc_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
104 const unsigned char *iv, int enc)
105 {
106 DES_cblock *deskey = (DES_cblock *)key;
107
108 DES_set_key_unchecked(deskey,&data(ctx)->ks);
109 memcpy(&data(ctx)->inw[0],&key[8],8);
110 memcpy(&data(ctx)->outw[0],&key[16],8);
111
112 return 1;
113 }
114
desx_cbc_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,unsigned int inl)115 static int desx_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
116 const unsigned char *in, unsigned int inl)
117 {
118 DES_xcbc_encrypt(in,out,inl,&data(ctx)->ks,
119 (DES_cblock *)&(ctx->iv[0]),
120 &data(ctx)->inw,
121 &data(ctx)->outw,
122 ctx->encrypt);
123 return 1;
124 }
125 #endif
126