GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/crypto/../../libssl/src/crypto/cmac/cm_pmeth.c Lines: 0 59 0.0 %
Date: 2016-12-06 Branches: 0 40 0.0 %

Line Branch Exec Source
1
/* $OpenBSD: cm_pmeth.c,v 1.8 2014/07/11 08:44:48 jsing Exp $ */
2
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3
 * project 2010.
4
 */
5
/* ====================================================================
6
 * Copyright (c) 2010 The OpenSSL Project.  All rights reserved.
7
 *
8
 * Redistribution and use in source and binary forms, with or without
9
 * modification, are permitted provided that the following conditions
10
 * are met:
11
 *
12
 * 1. Redistributions of source code must retain the above copyright
13
 *    notice, this list of conditions and the following disclaimer.
14
 *
15
 * 2. Redistributions in binary form must reproduce the above copyright
16
 *    notice, this list of conditions and the following disclaimer in
17
 *    the documentation and/or other materials provided with the
18
 *    distribution.
19
 *
20
 * 3. All advertising materials mentioning features or use of this
21
 *    software must display the following acknowledgment:
22
 *    "This product includes software developed by the OpenSSL Project
23
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24
 *
25
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26
 *    endorse or promote products derived from this software without
27
 *    prior written permission. For written permission, please contact
28
 *    licensing@OpenSSL.org.
29
 *
30
 * 5. Products derived from this software may not be called "OpenSSL"
31
 *    nor may "OpenSSL" appear in their names without prior written
32
 *    permission of the OpenSSL Project.
33
 *
34
 * 6. Redistributions of any form whatsoever must retain the following
35
 *    acknowledgment:
36
 *    "This product includes software developed by the OpenSSL Project
37
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38
 *
39
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
43
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50
 * OF THE POSSIBILITY OF SUCH DAMAGE.
51
 * ====================================================================
52
 */
53
54
#include <stdio.h>
55
#include <string.h>
56
57
#include <openssl/cmac.h>
58
#include <openssl/evp.h>
59
#include <openssl/x509.h>
60
#include <openssl/x509v3.h>
61
62
#include "evp_locl.h"
63
64
/* The context structure and "key" is simply a CMAC_CTX */
65
66
static int
67
pkey_cmac_init(EVP_PKEY_CTX *ctx)
68
{
69
	ctx->data = CMAC_CTX_new();
70
	if (!ctx->data)
71
		return 0;
72
	ctx->keygen_info_count = 0;
73
	return 1;
74
}
75
76
static int
77
pkey_cmac_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
78
{
79
	if (!pkey_cmac_init(dst))
80
		return 0;
81
	if (!CMAC_CTX_copy(dst->data, src->data))
82
		return 0;
83
	return 1;
84
}
85
86
static void
87
pkey_cmac_cleanup(EVP_PKEY_CTX *ctx)
88
{
89
	CMAC_CTX_free(ctx->data);
90
}
91
92
static int
93
pkey_cmac_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
94
{
95
	CMAC_CTX *cmkey = CMAC_CTX_new();
96
	CMAC_CTX *cmctx = ctx->data;
97
98
	if (!cmkey)
99
		return 0;
100
	if (!CMAC_CTX_copy(cmkey, cmctx)) {
101
		CMAC_CTX_free(cmkey);
102
		return 0;
103
	}
104
	EVP_PKEY_assign(pkey, EVP_PKEY_CMAC, cmkey);
105
106
	return 1;
107
}
108
109
static int
110
int_update(EVP_MD_CTX *ctx, const void *data, size_t count)
111
{
112
	if (!CMAC_Update(ctx->pctx->data, data, count))
113
		return 0;
114
	return 1;
115
}
116
117
static int
118
cmac_signctx_init(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx)
119
{
120
	EVP_MD_CTX_set_flags(mctx, EVP_MD_CTX_FLAG_NO_INIT);
121
	mctx->update = int_update;
122
	return 1;
123
}
124
125
static int
126
cmac_signctx(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
127
    EVP_MD_CTX *mctx)
128
{
129
	return CMAC_Final(ctx->data, sig, siglen);
130
}
131
132
static int
133
pkey_cmac_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
134
{
135
	CMAC_CTX *cmctx = ctx->data;
136
137
	switch (type) {
138
	case EVP_PKEY_CTRL_SET_MAC_KEY:
139
		if (!p2 || p1 < 0)
140
			return 0;
141
		if (!CMAC_Init(cmctx, p2, p1, NULL, NULL))
142
			return 0;
143
		break;
144
145
	case EVP_PKEY_CTRL_CIPHER:
146
		if (!CMAC_Init(cmctx, NULL, 0, p2, ctx->engine))
147
			return 0;
148
		break;
149
150
	case EVP_PKEY_CTRL_MD:
151
		if (ctx->pkey && !CMAC_CTX_copy(ctx->data,
152
		    (CMAC_CTX *)ctx->pkey->pkey.ptr))
153
			return 0;
154
		if (!CMAC_Init(cmctx, NULL, 0, NULL, NULL))
155
			return 0;
156
		break;
157
158
	default:
159
		return -2;
160
	}
161
	return 1;
162
}
163
164
static int
165
pkey_cmac_ctrl_str(EVP_PKEY_CTX *ctx, const char *type, const char *value)
166
{
167
	if (!value)
168
		return 0;
169
	if (!strcmp(type, "key")) {
170
		void *p = (void *)value;
171
		return pkey_cmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY,
172
		    strlen(p), p);
173
	}
174
	if (!strcmp(type, "cipher")) {
175
		const EVP_CIPHER *c;
176
177
		c = EVP_get_cipherbyname(value);
178
		if (!c)
179
			return 0;
180
		return pkey_cmac_ctrl(ctx, EVP_PKEY_CTRL_CIPHER, -1, (void *)c);
181
	}
182
	if (!strcmp(type, "hexkey")) {
183
		unsigned char *key;
184
		int r;
185
		long keylen;
186
187
		key = string_to_hex(value, &keylen);
188
		if (!key)
189
			return 0;
190
		r = pkey_cmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, keylen, key);
191
		free(key);
192
		return r;
193
	}
194
195
	return -2;
196
}
197
198
const EVP_PKEY_METHOD cmac_pkey_meth = {
199
	.pkey_id = EVP_PKEY_CMAC,
200
	.flags = EVP_PKEY_FLAG_SIGCTX_CUSTOM,
201
202
	.init = pkey_cmac_init,
203
	.copy = pkey_cmac_copy,
204
	.cleanup = pkey_cmac_cleanup,
205
206
	.keygen = pkey_cmac_keygen,
207
208
	.signctx_init = cmac_signctx_init,
209
	.signctx = cmac_signctx,
210
211
	.ctrl = pkey_cmac_ctrl,
212
	.ctrl_str = pkey_cmac_ctrl_str
213
};