GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/gost/gost89_keywrap.c Lines: 0 41 0.0 %
Date: 2017-11-07 Branches: 0 8 0.0 %

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/* $OpenBSD: gost89_keywrap.c,v 1.3 2014/11/09 19:28:44 miod Exp $ */
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/*
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 * Copyright (c) 2014 Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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 * Copyright (c) 2005-2006 Cryptocom LTD
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 *
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in
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 *    the documentation and/or other materials provided with the
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 *    distribution.
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 *
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 * 3. All advertising materials mentioning features or use of this
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 *    software must display the following acknowledgment:
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 *    "This product includes software developed by the OpenSSL Project
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 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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 *
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 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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 *    endorse or promote products derived from this software without
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 *    prior written permission. For written permission, please contact
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 *    openssl-core@openssl.org.
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 *
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 * 5. Products derived from this software may not be called "OpenSSL"
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 *    nor may "OpenSSL" appear in their names without prior written
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 *    permission of the OpenSSL Project.
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 *
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 * 6. Redistributions of any form whatsoever must retain the following
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 *    acknowledgment:
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 *    "This product includes software developed by the OpenSSL Project
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 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
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 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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 * OF THE POSSIBILITY OF SUCH DAMAGE.
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 * ====================================================================
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 */
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#include <string.h>
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#include <openssl/opensslconf.h>
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#ifndef OPENSSL_NO_GOST
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#include <openssl/gost.h>
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#include "gost_locl.h"
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static void
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key_diversify_crypto_pro(GOST2814789_KEY *ctx, const unsigned char *inputKey,
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    const unsigned char *ukm, unsigned char *outputKey)
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{
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	unsigned long k, s1, s2;
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	int i, mask;
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	unsigned char S[8];
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	unsigned char *p;
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	memcpy(outputKey, inputKey, 32);
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	for (i = 0; i < 8; i++) {
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		/* Make array of integers from key */
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		/* Compute IV S */
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		s1 = 0, s2 = 0;
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		p = outputKey;
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		for (mask = 1; mask < 256; mask <<= 1) {
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			c2l(p, k);
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			if (mask & ukm[i]) {
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				s1 += k;
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			} else {
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				s2 += k;
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			}
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		}
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		p = S;
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		l2c (s1, p);
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		l2c (s2, p);
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		Gost2814789_set_key(ctx, outputKey, 256);
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		mask = 0;
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		Gost2814789_cfb64_encrypt(outputKey, outputKey, 32, ctx, S,
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		    &mask, 1);
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	}
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}
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int
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gost_key_wrap_crypto_pro(int nid, const unsigned char *keyExchangeKey,
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    const unsigned char *ukm, const unsigned char *sessionKey,
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    unsigned char *wrappedKey)
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{
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	GOST2814789_KEY ctx;
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	unsigned char kek_ukm[32];
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	Gost2814789_set_sbox(&ctx, nid);
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	key_diversify_crypto_pro(&ctx, keyExchangeKey, ukm, kek_ukm);
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	Gost2814789_set_key(&ctx, kek_ukm, 256);
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	memcpy(wrappedKey, ukm, 8);
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	Gost2814789_encrypt(sessionKey +  0, wrappedKey + 8 +  0, &ctx);
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	Gost2814789_encrypt(sessionKey +  8, wrappedKey + 8 +  8, &ctx);
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	Gost2814789_encrypt(sessionKey + 16, wrappedKey + 8 + 16, &ctx);
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	Gost2814789_encrypt(sessionKey + 24, wrappedKey + 8 + 24, &ctx);
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	GOST2814789IMIT(sessionKey, 32, wrappedKey + 40, nid, kek_ukm, ukm);
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	return 1;
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}
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int
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gost_key_unwrap_crypto_pro(int nid, const unsigned char *keyExchangeKey,
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    const unsigned char *wrappedKey, unsigned char *sessionKey)
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{
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	unsigned char kek_ukm[32], cek_mac[4];
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	GOST2814789_KEY ctx;
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	Gost2814789_set_sbox(&ctx, nid);
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	/* First 8 bytes of wrapped Key is ukm */
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	key_diversify_crypto_pro(&ctx, keyExchangeKey, wrappedKey, kek_ukm);
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	Gost2814789_set_key(&ctx, kek_ukm, 256);
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	Gost2814789_decrypt(wrappedKey + 8 +  0, sessionKey +  0, &ctx);
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	Gost2814789_decrypt(wrappedKey + 8 +  8, sessionKey +  8, &ctx);
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	Gost2814789_decrypt(wrappedKey + 8 + 16, sessionKey + 16, &ctx);
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	Gost2814789_decrypt(wrappedKey + 8 + 24, sessionKey + 24, &ctx);
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	GOST2814789IMIT(sessionKey, 32, cek_mac, nid, kek_ukm, wrappedKey);
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	if (memcmp(cek_mac, wrappedKey + 40, 4))
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		return 0;
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	return 1;
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}
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#endif