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d02b48c6 | 1 | /* crypto/evp/e_xcbc_d.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
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. | |
0f113f3e | 8 | * |
d02b48c6 RE |
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). | |
0f113f3e | 15 | * |
d02b48c6 RE |
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. | |
0f113f3e | 22 | * |
d02b48c6 RE |
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 :-). | |
0f113f3e | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 40 | * |
d02b48c6 RE |
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. | |
0f113f3e | 52 | * |
d02b48c6 RE |
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> | |
b39fc560 | 60 | #include "internal/cryptlib.h" |
9e9e8cb6 RL |
61 | |
62 | #ifndef OPENSSL_NO_DES | |
63 | ||
0f113f3e MC |
64 | # include <openssl/evp.h> |
65 | # include <openssl/objects.h> | |
66 | # include "evp_locl.h" | |
67 | # include <openssl/des.h> | |
d02b48c6 | 68 | |
1921eaad | 69 | static int desx_cbc_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
0f113f3e | 70 | const unsigned char *iv, int enc); |
be06a934 | 71 | static int desx_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
0f113f3e | 72 | const unsigned char *in, size_t inl); |
dbad1690 | 73 | |
0f113f3e MC |
74 | typedef struct { |
75 | DES_key_schedule ks; /* key schedule */ | |
c2e4f17c RL |
76 | DES_cblock inw; |
77 | DES_cblock outw; | |
0f113f3e | 78 | } DESX_CBC_KEY; |
dbad1690 | 79 | |
0f113f3e | 80 | # define data(ctx) ((DESX_CBC_KEY *)(ctx)->cipher_data) |
dbad1690 | 81 | |
0f113f3e MC |
82 | static const EVP_CIPHER d_xcbc_cipher = { |
83 | NID_desx_cbc, | |
84 | 8, 24, 8, | |
85 | EVP_CIPH_CBC_MODE, | |
86 | desx_cbc_init_key, | |
87 | desx_cbc_cipher, | |
88 | NULL, | |
89 | sizeof(DESX_CBC_KEY), | |
90 | EVP_CIPHER_set_asn1_iv, | |
91 | EVP_CIPHER_get_asn1_iv, | |
92 | NULL, | |
93 | NULL | |
94 | }; | |
d02b48c6 | 95 | |
13588350 | 96 | const EVP_CIPHER *EVP_desx_cbc(void) |
0f113f3e MC |
97 | { |
98 | return (&d_xcbc_cipher); | |
99 | } | |
100 | ||
1921eaad | 101 | static int desx_cbc_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
0f113f3e MC |
102 | const unsigned char *iv, int enc) |
103 | { | |
104 | DES_cblock *deskey = (DES_cblock *)key; | |
edf0bfb5 | 105 | |
0f113f3e MC |
106 | DES_set_key_unchecked(deskey, &data(ctx)->ks); |
107 | memcpy(&data(ctx)->inw[0], &key[8], 8); | |
108 | memcpy(&data(ctx)->outw[0], &key[16], 8); | |
360370d9 | 109 | |
0f113f3e MC |
110 | return 1; |
111 | } | |
d02b48c6 | 112 | |
be06a934 | 113 | static int desx_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
0f113f3e MC |
114 | const unsigned char *in, size_t inl) |
115 | { | |
116 | while (inl >= EVP_MAXCHUNK) { | |
117 | DES_xcbc_encrypt(in, out, (long)EVP_MAXCHUNK, &data(ctx)->ks, | |
118 | (DES_cblock *)&(ctx->iv[0]), | |
119 | &data(ctx)->inw, &data(ctx)->outw, ctx->encrypt); | |
120 | inl -= EVP_MAXCHUNK; | |
121 | in += EVP_MAXCHUNK; | |
122 | out += EVP_MAXCHUNK; | |
123 | } | |
124 | if (inl) | |
125 | DES_xcbc_encrypt(in, out, (long)inl, &data(ctx)->ks, | |
126 | (DES_cblock *)&(ctx->iv[0]), | |
127 | &data(ctx)->inw, &data(ctx)->outw, ctx->encrypt); | |
128 | return 1; | |
129 | } | |
d02f751c | 130 | #endif |