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-rw-r--r--src/lib/libcrypto/evp/e_xcbc_d.c139
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diff --git a/src/lib/libcrypto/evp/e_xcbc_d.c b/src/lib/libcrypto/evp/e_xcbc_d.c
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1/* $OpenBSD: e_xcbc_d.c,v 1.18 2024/04/09 13:52:41 beck 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_local.h"
71
72static int desx_cbc_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
73 const unsigned char *iv, int enc);
74static int desx_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
75 const unsigned char *in, size_t inl);
76
77
78typedef 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
86static const EVP_CIPHER d_xcbc_cipher = {
87 .nid = NID_desx_cbc,
88 .block_size = 8,
89 .key_len = 24,
90 .iv_len = 8,
91 .flags = EVP_CIPH_CBC_MODE,
92 .init = desx_cbc_init_key,
93 .do_cipher = desx_cbc_cipher,
94 .cleanup = NULL,
95 .ctx_size = sizeof(DESX_CBC_KEY),
96 .set_asn1_parameters = EVP_CIPHER_set_asn1_iv,
97 .get_asn1_parameters = EVP_CIPHER_get_asn1_iv,
98 .ctrl = NULL,
99};
100
101const EVP_CIPHER *
102EVP_desx_cbc(void)
103{
104 return (&d_xcbc_cipher);
105}
106LCRYPTO_ALIAS(EVP_desx_cbc);
107
108static int
109desx_cbc_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
110 const unsigned char *iv, int enc)
111{
112 DES_cblock *deskey = (DES_cblock *)key;
113
114 DES_set_key_unchecked(deskey, &data(ctx)->ks);
115 memcpy(&data(ctx)->inw[0], &key[8], 8);
116 memcpy(&data(ctx)->outw[0], &key[16], 8);
117
118 return 1;
119}
120
121static int
122desx_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
123 const unsigned char *in, size_t inl)
124{
125 while (inl >= EVP_MAXCHUNK) {
126 DES_xcbc_encrypt(in, out, (long)EVP_MAXCHUNK, &data(ctx)->ks,
127 (DES_cblock *)&(ctx->iv[0]), &data(ctx)->inw,
128 &data(ctx)->outw, ctx->encrypt);
129 inl -= EVP_MAXCHUNK;
130 in += EVP_MAXCHUNK;
131 out += EVP_MAXCHUNK;
132 }
133 if (inl)
134 DES_xcbc_encrypt(in, out, (long)inl, &data(ctx)->ks,
135 (DES_cblock *)&(ctx->iv[0]), &data(ctx)->inw,
136 &data(ctx)->outw, ctx->encrypt);
137 return 1;
138}
139#endif
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