xref: /freebsd/crypto/openssl/crypto/evp/e_xcbc_d.c (revision 6990ffd8a95caaba6858ad44ff1b3157d1efba8f)
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 #ifndef NO_DES
60 #include <stdio.h>
61 #include "cryptlib.h"
62 #include <openssl/evp.h>
63 #include <openssl/objects.h>
64 
65 static int desx_cbc_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
66 			     const unsigned char *iv,int enc);
67 static int desx_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
68 			   const unsigned char *in, unsigned int inl);
69 static EVP_CIPHER d_xcbc_cipher=
70 	{
71 	NID_desx_cbc,
72 	8,24,8,
73 	EVP_CIPH_CBC_MODE,
74 	desx_cbc_init_key,
75 	desx_cbc_cipher,
76 	NULL,
77 	sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+
78 		sizeof((((EVP_CIPHER_CTX *)NULL)->c.desx_cbc)),
79 	EVP_CIPHER_set_asn1_iv,
80 	EVP_CIPHER_get_asn1_iv,
81 	NULL
82 	};
83 
84 EVP_CIPHER *EVP_desx_cbc(void)
85 	{
86 	return(&d_xcbc_cipher);
87 	}
88 
89 static int desx_cbc_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
90 			     const unsigned char *iv, int enc)
91 	{
92 	des_cblock *deskey = (des_cblock *)key;
93 
94 	des_set_key_unchecked(deskey,ctx->c.desx_cbc.ks);
95 	memcpy(&(ctx->c.desx_cbc.inw[0]),&(key[8]),8);
96 	memcpy(&(ctx->c.desx_cbc.outw[0]),&(key[16]),8);
97 
98 	return 1;
99 	}
100 
101 static int desx_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
102 			   const unsigned char *in, unsigned int inl)
103 	{
104 	des_xcbc_encrypt(in,out,inl,ctx->c.desx_cbc.ks,
105 		(des_cblock *)&(ctx->iv[0]),
106 		&ctx->c.desx_cbc.inw,
107 		&ctx->c.desx_cbc.outw,
108 		ctx->encrypt);
109 	return 1;
110 	}
111 #endif
112