1 |
|
|
/* $OpenBSD: e_xcbc_d.c,v 1.12 2014/07/11 08:44:48 jsing Exp $ */ |
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 <string.h> |
61 |
|
|
|
62 |
|
|
#include <openssl/opensslconf.h> |
63 |
|
|
|
64 |
|
|
#ifndef OPENSSL_NO_DES |
65 |
|
|
|
66 |
|
|
#include <openssl/des.h> |
67 |
|
|
#include <openssl/evp.h> |
68 |
|
|
#include <openssl/objects.h> |
69 |
|
|
|
70 |
|
|
#include "evp_locl.h" |
71 |
|
|
|
72 |
|
|
static int desx_cbc_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
73 |
|
|
const unsigned char *iv, int enc); |
74 |
|
|
static int desx_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
75 |
|
|
const unsigned char *in, size_t inl); |
76 |
|
|
|
77 |
|
|
|
78 |
|
|
typedef struct { |
79 |
|
|
DES_key_schedule ks;/* key schedule */ |
80 |
|
|
DES_cblock inw; |
81 |
|
|
DES_cblock outw; |
82 |
|
|
} DESX_CBC_KEY; |
83 |
|
|
|
84 |
|
|
#define data(ctx) ((DESX_CBC_KEY *)(ctx)->cipher_data) |
85 |
|
|
|
86 |
|
|
static const EVP_CIPHER d_xcbc_cipher = { |
87 |
|
|
NID_desx_cbc, |
88 |
|
|
8, 24, 8, |
89 |
|
|
EVP_CIPH_CBC_MODE, |
90 |
|
|
desx_cbc_init_key, |
91 |
|
|
desx_cbc_cipher, |
92 |
|
|
NULL, |
93 |
|
|
sizeof(DESX_CBC_KEY), |
94 |
|
|
EVP_CIPHER_set_asn1_iv, |
95 |
|
|
EVP_CIPHER_get_asn1_iv, |
96 |
|
|
NULL, |
97 |
|
|
NULL |
98 |
|
|
}; |
99 |
|
|
|
100 |
|
|
const EVP_CIPHER * |
101 |
|
|
EVP_desx_cbc(void) |
102 |
|
12 |
{ |
103 |
|
12 |
return (&d_xcbc_cipher); |
104 |
|
|
} |
105 |
|
|
|
106 |
|
|
static int |
107 |
|
|
desx_cbc_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
108 |
|
|
const unsigned char *iv, int enc) |
109 |
|
2 |
{ |
110 |
|
2 |
DES_cblock *deskey = (DES_cblock *)key; |
111 |
|
|
|
112 |
|
2 |
DES_set_key_unchecked(deskey, &data(ctx)->ks); |
113 |
|
2 |
memcpy(&data(ctx)->inw[0], &key[8], 8); |
114 |
|
2 |
memcpy(&data(ctx)->outw[0], &key[16], 8); |
115 |
|
|
|
116 |
|
2 |
return 1; |
117 |
|
|
} |
118 |
|
|
|
119 |
|
|
static int |
120 |
|
|
desx_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
121 |
|
|
const unsigned char *in, size_t inl) |
122 |
|
2 |
{ |
123 |
✗✓ |
4 |
while (inl >= EVP_MAXCHUNK) { |
124 |
|
|
DES_xcbc_encrypt(in, out, (long)EVP_MAXCHUNK, &data(ctx)->ks, |
125 |
|
|
(DES_cblock *)&(ctx->iv[0]), &data(ctx)->inw, |
126 |
|
|
&data(ctx)->outw, ctx->encrypt); |
127 |
|
|
inl -= EVP_MAXCHUNK; |
128 |
|
|
in += EVP_MAXCHUNK; |
129 |
|
|
out += EVP_MAXCHUNK; |
130 |
|
|
} |
131 |
✓✗ |
2 |
if (inl) |
132 |
|
2 |
DES_xcbc_encrypt(in, out, (long)inl, &data(ctx)->ks, |
133 |
|
|
(DES_cblock *)&(ctx->iv[0]), &data(ctx)->inw, |
134 |
|
|
&data(ctx)->outw, ctx->encrypt); |
135 |
|
2 |
return 1; |
136 |
|
|
} |
137 |
|
|
#endif |