Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/crypto/../../libssl/src/crypto/gost/gost89_keywrap.c	Lines:	0	36	0.0 %
Date:	2016-12-06	Branches:	0	8	0.0 %


/* $OpenBSD: gost89_keywrap.c,v 1.3 2014/11/09 19:28:44 miod Exp $ */
/*
 * Copyright (c) 2014 Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
 * Copyright (c) 2005-2006 Cryptocom LTD
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 */

#include <string.h>

#include <openssl/opensslconf.h>

#ifndef OPENSSL_NO_GOST

#include <openssl/gost.h>

#include "gost_locl.h"

static void
key_diversify_crypto_pro(GOST2814789_KEY *ctx, const unsigned char *inputKey,
    const unsigned char *ukm, unsigned char *outputKey)
{
	unsigned long k, s1, s2;
	int i, mask;
	unsigned char S[8];
	unsigned char *p;

	memcpy(outputKey, inputKey, 32);
	for (i = 0; i < 8; i++) {
		/* Make array of integers from key */
		/* Compute IV S */
		s1 = 0, s2 = 0;
		p = outputKey;
		for (mask = 1; mask < 256; mask <<= 1) {
			c2l(p, k);
			if (mask & ukm[i]) {
				s1 += k;
			} else {
				s2 += k;
			}
		}
		p = S;
		l2c (s1, p);
		l2c (s2, p);
		Gost2814789_set_key(ctx, outputKey, 256);
		mask = 0;
		Gost2814789_cfb64_encrypt(outputKey, outputKey, 32, ctx, S,
		    &mask, 1);
	}
}

int
gost_key_wrap_crypto_pro(int nid, const unsigned char *keyExchangeKey,
    const unsigned char *ukm, const unsigned char *sessionKey,
    unsigned char *wrappedKey)
{
	GOST2814789_KEY ctx;
	unsigned char kek_ukm[32];

	Gost2814789_set_sbox(&ctx, nid);
	key_diversify_crypto_pro(&ctx, keyExchangeKey, ukm, kek_ukm);
	Gost2814789_set_key(&ctx, kek_ukm, 256);
	memcpy(wrappedKey, ukm, 8);
	Gost2814789_encrypt(sessionKey +  0, wrappedKey + 8 +  0, &ctx);
	Gost2814789_encrypt(sessionKey +  8, wrappedKey + 8 +  8, &ctx);
	Gost2814789_encrypt(sessionKey + 16, wrappedKey + 8 + 16, &ctx);
	Gost2814789_encrypt(sessionKey + 24, wrappedKey + 8 + 24, &ctx);
	GOST2814789IMIT(sessionKey, 32, wrappedKey + 40, nid, kek_ukm, ukm);
	return 1;
}

int
gost_key_unwrap_crypto_pro(int nid, const unsigned char *keyExchangeKey,
    const unsigned char *wrappedKey, unsigned char *sessionKey)
{
	unsigned char kek_ukm[32], cek_mac[4];
	GOST2814789_KEY ctx;

	Gost2814789_set_sbox(&ctx, nid);
	/* First 8 bytes of wrapped Key is ukm */
	key_diversify_crypto_pro(&ctx, keyExchangeKey, wrappedKey, kek_ukm);
	Gost2814789_set_key(&ctx, kek_ukm, 256);
	Gost2814789_decrypt(wrappedKey + 8 +  0, sessionKey +  0, &ctx);
	Gost2814789_decrypt(wrappedKey + 8 +  8, sessionKey +  8, &ctx);
	Gost2814789_decrypt(wrappedKey + 8 + 16, sessionKey + 16, &ctx);
	Gost2814789_decrypt(wrappedKey + 8 + 24, sessionKey + 24, &ctx);

	GOST2814789IMIT(sessionKey, 32, cek_mac, nid, kek_ukm, wrappedKey);
	if (memcmp(cek_mac, wrappedKey + 40, 4))
		return 0;

	return 1;
}

#endif


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: gost89_keywrap.c,v 1.3 2014/11/09 19:28:44 miod Exp $ */
2			/*
3			* Copyright (c) 2014 Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
4			* Copyright (c) 2005-2006 Cryptocom LTD
5			*
6			* Redistribution and use in source and binary forms, with or without
7			* modification, are permitted provided that the following conditions
8			* are met:
9			*
10			* 1. Redistributions of source code must retain the above copyright
11			* notice, this list of conditions and the following disclaimer.
12			*
13			* 2. Redistributions in binary form must reproduce the above copyright
14			* notice, this list of conditions and the following disclaimer in
15			* the documentation and/or other materials provided with the
16			* distribution.
17			*
18			* 3. All advertising materials mentioning features or use of this
19			* software must display the following acknowledgment:
20			* "This product includes software developed by the OpenSSL Project
21			* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
22			*
23			* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
24			* endorse or promote products derived from this software without
25			* prior written permission. For written permission, please contact
26			* openssl-core@openssl.org.
27			*
28			* 5. Products derived from this software may not be called "OpenSSL"
29			* nor may "OpenSSL" appear in their names without prior written
30			* permission of the OpenSSL Project.
31			*
32			* 6. Redistributions of any form whatsoever must retain the following
33			* acknowledgment:
34			* "This product includes software developed by the OpenSSL Project
35			* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
36			*
37			* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
38			* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
39			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
40			* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
41			* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42			* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
43			* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
44			* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
45			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
46			* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
47			* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
48			* OF THE POSSIBILITY OF SUCH DAMAGE.
49			* ====================================================================
50			*/
51
52			#include <string.h>
53
54			#include <openssl/opensslconf.h>
55
56			#ifndef OPENSSL_NO_GOST
57
58			#include <openssl/gost.h>
59
60			#include "gost_locl.h"
61
62			static void
63			key_diversify_crypto_pro(GOST2814789_KEY ctx, const unsigned char inputKey,
64			const unsigned char ukm, unsigned char outputKey)
65			{
66			unsigned long k, s1, s2;
67			int i, mask;
68			unsigned char S[8];
69			unsigned char *p;
70
71			memcpy(outputKey, inputKey, 32);
72			for (i = 0; i < 8; i++) {
73			/* Make array of integers from key */
74			/* Compute IV S */
75			s1 = 0, s2 = 0;
76			p = outputKey;
77			for (mask = 1; mask < 256; mask <<= 1) {
78			c2l(p, k);
79			if (mask & ukm[i]) {
80			s1 += k;
81			} else {
82			s2 += k;
83			}
84			}
85			p = S;
86			l2c (s1, p);
87			l2c (s2, p);
88			Gost2814789_set_key(ctx, outputKey, 256);
89			mask = 0;
90			Gost2814789_cfb64_encrypt(outputKey, outputKey, 32, ctx, S,
91			&mask, 1);
92			}
93			}
94
95			int
96			gost_key_wrap_crypto_pro(int nid, const unsigned char *keyExchangeKey,
97			const unsigned char ukm, const unsigned char sessionKey,
98			unsigned char *wrappedKey)
99			{
100			GOST2814789_KEY ctx;
101			unsigned char kek_ukm[32];
102
103			Gost2814789_set_sbox(&ctx, nid);
104			key_diversify_crypto_pro(&ctx, keyExchangeKey, ukm, kek_ukm);
105			Gost2814789_set_key(&ctx, kek_ukm, 256);
106			memcpy(wrappedKey, ukm, 8);
107			Gost2814789_encrypt(sessionKey + 0, wrappedKey + 8 + 0, &ctx);
108			Gost2814789_encrypt(sessionKey + 8, wrappedKey + 8 + 8, &ctx);
109			Gost2814789_encrypt(sessionKey + 16, wrappedKey + 8 + 16, &ctx);
110			Gost2814789_encrypt(sessionKey + 24, wrappedKey + 8 + 24, &ctx);
111			GOST2814789IMIT(sessionKey, 32, wrappedKey + 40, nid, kek_ukm, ukm);
112			return 1;
113			}
114
115			int
116			gost_key_unwrap_crypto_pro(int nid, const unsigned char *keyExchangeKey,
117			const unsigned char wrappedKey, unsigned char sessionKey)
118			{
119			unsigned char kek_ukm[32], cek_mac[4];
120			GOST2814789_KEY ctx;
121
122			Gost2814789_set_sbox(&ctx, nid);
123			/* First 8 bytes of wrapped Key is ukm */
124			key_diversify_crypto_pro(&ctx, keyExchangeKey, wrappedKey, kek_ukm);
125			Gost2814789_set_key(&ctx, kek_ukm, 256);
126			Gost2814789_decrypt(wrappedKey + 8 + 0, sessionKey + 0, &ctx);
127			Gost2814789_decrypt(wrappedKey + 8 + 8, sessionKey + 8, &ctx);
128			Gost2814789_decrypt(wrappedKey + 8 + 16, sessionKey + 16, &ctx);
129			Gost2814789_decrypt(wrappedKey + 8 + 24, sessionKey + 24, &ctx);
130
131			GOST2814789IMIT(sessionKey, 32, cek_mac, nid, kek_ukm, wrappedKey);
132			if (memcmp(cek_mac, wrappedKey + 40, 4))
133			return 0;
134
135			return 1;
136			}
137
138			#endif