GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/evp/e_xcbc_d.c Lines: 12 18 66.7 %
Date: 2017-11-13 Branches: 2 4 50.0 %

Line Branch Exec Source
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
{
103
2856
	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
{
110
36
	DES_cblock *deskey = (DES_cblock *)key;
111
112
18
	DES_set_key_unchecked(deskey, &data(ctx)->ks);
113
18
	memcpy(&data(ctx)->inw[0], &key[8], 8);
114
18
	memcpy(&data(ctx)->outw[0], &key[16], 8);
115
116
18
	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
{
123
360
	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
120
	if (inl)
132
240
		DES_xcbc_encrypt(in, out, (long)inl, &data(ctx)->ks,
133
120
		    (DES_cblock *)&(ctx->iv[0]), &data(ctx)->inw,
134
120
		    &data(ctx)->outw, ctx->encrypt);
135
120
	return 1;
136
}
137
#endif