Branch data Line data Source code
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 "evp_locl.h"
67 : : #include <openssl/des.h>
68 : :
69 : : static int desx_cbc_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
70 : : const unsigned char *iv,int enc);
71 : : static int desx_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
72 : : const unsigned char *in, size_t inl);
73 : :
74 : :
75 : : typedef struct
76 : : {
77 : : DES_key_schedule ks;/* key schedule */
78 : : DES_cblock inw;
79 : : DES_cblock outw;
80 : : } DESX_CBC_KEY;
81 : :
82 : : #define data(ctx) ((DESX_CBC_KEY *)(ctx)->cipher_data)
83 : :
84 : : static const EVP_CIPHER d_xcbc_cipher=
85 : : {
86 : : NID_desx_cbc,
87 : : 8,24,8,
88 : : EVP_CIPH_CBC_MODE,
89 : : desx_cbc_init_key,
90 : : desx_cbc_cipher,
91 : : NULL,
92 : : sizeof(DESX_CBC_KEY),
93 : : EVP_CIPHER_set_asn1_iv,
94 : : EVP_CIPHER_get_asn1_iv,
95 : : NULL,
96 : : NULL
97 : : };
98 : :
99 : 726 : const EVP_CIPHER *EVP_desx_cbc(void)
100 : : {
101 : 726 : return(&d_xcbc_cipher);
102 : : }
103 : :
104 : 6 : static int desx_cbc_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
105 : : const unsigned char *iv, int enc)
106 : : {
107 : 6 : DES_cblock *deskey = (DES_cblock *)key;
108 : :
109 : 6 : DES_set_key_unchecked(deskey,&data(ctx)->ks);
110 : 6 : memcpy(&data(ctx)->inw[0],&key[8],8);
111 : 6 : memcpy(&data(ctx)->outw[0],&key[16],8);
112 : :
113 : 6 : return 1;
114 : : }
115 : :
116 : 62 : static int desx_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
117 : : const unsigned char *in, size_t inl)
118 : : {
119 [ - + ]: 62 : while (inl>=EVP_MAXCHUNK)
120 : : {
121 : 0 : DES_xcbc_encrypt(in,out,(long)EVP_MAXCHUNK,&data(ctx)->ks,
122 : 0 : (DES_cblock *)&(ctx->iv[0]),
123 : 0 : &data(ctx)->inw,
124 : 0 : &data(ctx)->outw,
125 : : ctx->encrypt);
126 : 0 : inl-=EVP_MAXCHUNK;
127 : 0 : in +=EVP_MAXCHUNK;
128 : 0 : out+=EVP_MAXCHUNK;
129 : : }
130 [ + - ]: 62 : if (inl)
131 : 62 : DES_xcbc_encrypt(in,out,(long)inl,&data(ctx)->ks,
132 : 62 : (DES_cblock *)&(ctx->iv[0]),
133 : 62 : &data(ctx)->inw,
134 : 62 : &data(ctx)->outw,
135 : : ctx->encrypt);
136 : 62 : return 1;
137 : : }
138 : : #endif
|
