Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/gost/gostr341194.c	Lines:	99	108	91.7 %
Date:	2017-11-07	Branches:	18	22	81.8 %


/* $OpenBSD: gostr341194.c,v 1.5 2015/09/10 15:56:25 jsing 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/crypto.h>
#include <openssl/objects.h>
#include <openssl/gost.h>

#include "gost_locl.h"

/* Following functions are various bit meshing routines used in
 * GOST R 34.11-94 algorithms */
static void
swap_bytes(unsigned char *w, unsigned char *k)
{
	int i, j;

	for (i = 0; i < 4; i++)
		for (j = 0; j < 8; j++)
			k[i + 4 * j] = w[8 * i + j];
}

/* was A_A */
static void
circle_xor8(const unsigned char *w, unsigned char *k)
{
	unsigned char buf[8];
	int i;

	memcpy(buf, w, 8);
	memmove(k, w + 8, 24);
	for (i = 0; i < 8; i++)
		k[i + 24] = buf[i] ^ k[i];
}

/* was R_R */
static void
transform_3(unsigned char *data)
{
	unsigned short int acc;

	acc = (data[0] ^ data[2] ^ data[4] ^ data[6] ^ data[24] ^ data[30]) |
	     ((data[1] ^ data[3] ^ data[5] ^ data[7] ^ data[25] ^ data[31]) << 8);
	memmove(data, data + 2, 30);
	data[30] = acc & 0xff;
	data[31] = acc >> 8;
}

/* Adds blocks of N bytes modulo 2**(8*n). Returns carry*/
static int
add_blocks(int n, unsigned char *left, const unsigned char *right)
{
	int i;
	int carry = 0;
	int sum;

	for (i = 0; i < n; i++) {
		sum = (int)left[i] + (int)right[i] + carry;
		left[i] = sum & 0xff;
		carry = sum >> 8;
	}
	return carry;
}

/* Xor two sequences of bytes */
static void
xor_blocks(unsigned char *result, const unsigned char *a,
    const unsigned char *b, size_t len)
{
	size_t i;

	for (i = 0; i < len; i++)
		result[i] = a[i] ^ b[i];
}

/*
 * 	Calculate H(i+1) = Hash(Hi,Mi)
 * 	Where H and M are 32 bytes long
 */
static int
hash_step(GOSTR341194_CTX *c, unsigned char *H, const unsigned char *M)
{
	unsigned char U[32], W[32], V[32], S[32], Key[32];
	int i;

	/* Compute first key */
	xor_blocks(W, H, M, 32);
	swap_bytes(W, Key);
	/* Encrypt first 8 bytes of H with first key */
	Gost2814789_set_key(&c->cipher, Key, 256);
	Gost2814789_encrypt(H, S, &c->cipher);

	/* Compute second key */
	circle_xor8(H, U);
	circle_xor8(M, V);
	circle_xor8(V, V);
	xor_blocks(W, U, V, 32);
	swap_bytes(W, Key);
	/* encrypt second 8 bytes of H with second key */
	Gost2814789_set_key(&c->cipher, Key, 256);
	Gost2814789_encrypt(H+8, S+8, &c->cipher);

	/* compute third key */
	circle_xor8(U, U);
	U[31] = ~U[31];
	U[29] = ~U[29];
	U[28] = ~U[28];
	U[24] = ~U[24];
	U[23] = ~U[23];
	U[20] = ~U[20];
	U[18] = ~U[18];
	U[17] = ~U[17];
	U[14] = ~U[14];
	U[12] = ~U[12];
	U[10] = ~U[10];
	U[8] = ~U[8];
	U[7] = ~U[7];
	U[5] = ~U[5];
	U[3] = ~U[3];
	U[1] = ~U[1];
	circle_xor8(V, V);
	circle_xor8(V, V);
	xor_blocks(W, U, V, 32);
	swap_bytes(W, Key);
	/* encrypt third 8 bytes of H with third key */
	Gost2814789_set_key(&c->cipher, Key, 256);
	Gost2814789_encrypt(H+16, S+16, &c->cipher);

	/* Compute fourth key */
	circle_xor8(U, U);
	circle_xor8(V, V);
	circle_xor8(V, V);
	xor_blocks(W, U, V, 32);
	swap_bytes(W, Key);
	/* Encrypt last 8 bytes with fourth key */
	Gost2814789_set_key(&c->cipher, Key, 256);
	Gost2814789_encrypt(H+24, S+24, &c->cipher);

	for (i = 0; i < 12; i++)
		transform_3(S);
	xor_blocks(S, S, M, 32);
	transform_3(S);
	xor_blocks(S, S, H, 32);
	for (i = 0; i < 61; i++)
		transform_3(S);
	memcpy(H, S, 32);
	return 1;
}

int
GOSTR341194_Init(GOSTR341194_CTX *c, int nid)
{
	memset(c, 0, sizeof(*c));
	return Gost2814789_set_sbox(&c->cipher, nid);
}

static void
GOSTR341194_block_data_order(GOSTR341194_CTX *ctx, const unsigned char *p,
    size_t num)
{
	int i;

	for (i = 0; i < num; i++) {
		hash_step(ctx, ctx->H, p);
		add_blocks(32, ctx->S, p);
		p += 32;
	}
}

#define DATA_ORDER_IS_LITTLE_ENDIAN

#define HASH_CBLOCK	GOSTR341194_CBLOCK
#define HASH_LONG	GOSTR341194_LONG
#define HASH_CTX	GOSTR341194_CTX
#define HASH_UPDATE	GOSTR341194_Update
#define HASH_TRANSFORM	GOSTR341194_Transform
#define HASH_NO_FINAL	1
#define HASH_BLOCK_DATA_ORDER	GOSTR341194_block_data_order

#include "md32_common.h"

int
GOSTR341194_Final(unsigned char *md, GOSTR341194_CTX * c)
{
	unsigned char *p = (unsigned char *)c->data;
	unsigned char T[32];

	if (c->num > 0) {
		memset(p + c->num, 0, 32 - c->num);
		hash_step(c, c->H, p);
		add_blocks(32, c->S, p);
	}

	p = T;
	HOST_l2c(c->Nl, p);
	HOST_l2c(c->Nh, p);
	memset(p, 0, 32 - 8);
	hash_step(c, c->H, T);
	hash_step(c, c->H, c->S);

	memcpy(md, c->H, 32);

	return 1;
}

unsigned char *
GOSTR341194(const unsigned char *d, size_t n, unsigned char *md, int nid)
{
	GOSTR341194_CTX c;
	static unsigned char m[GOSTR341194_LENGTH];

	if (md == NULL)
		md = m;
	if (!GOSTR341194_Init(&c, nid))
		return 0;
	GOSTR341194_Update(&c, d, n);
	GOSTR341194_Final(md, &c);
	explicit_bzero(&c, sizeof(c));
	return (md);
}
#endif


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: gostr341194.c,v 1.5 2015/09/10 15:56:25 jsing 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			#include <openssl/crypto.h>
58			#include <openssl/objects.h>
59			#include <openssl/gost.h>
60
61			#include "gost_locl.h"
62
63			/* Following functions are various bit meshing routines used in
64			* GOST R 34.11-94 algorithms */
65			static void
66			swap_bytes(unsigned char w, unsigned char k)
67			{
68			int i, j;
69
70	✓✓	298848	for (i = 0; i < 4; i++)
71	✓✓	1956096	for (j = 0; j < 8; j++)
72		869376	k[i + 4 * j] = w[8 * i + j];
73		27168	}
74
75			/* was A_A */
76			static void
77			circle_xor8(const unsigned char w, unsigned char k)
78			{
79		122256	unsigned char buf[8];
80			int i;
81
82		61128	memcpy(buf, w, 8);
83		61128	memmove(k, w + 8, 24);
84	✓✓	1100304	for (i = 0; i < 8; i++)
85		489024	k[i + 24] = buf[i] ^ k[i];
86		61128	}
87
88			/* was R_R */
89			static void
90			transform_3(unsigned char *data)
91			{
92			unsigned short int acc;
93
94		1507824	acc = (data[0] ^ data[2] ^ data[4] ^ data[6] ^ data[24] ^ data[30]) \|
95		502608	((data[1] ^ data[3] ^ data[5] ^ data[7] ^ data[25] ^ data[31]) << 8);
96		502608	memmove(data, data + 2, 30);
97		502608	data[30] = acc & 0xff;
98		502608	data[31] = acc >> 8;
99		502608	}
100
101			/* Adds blocks of N bytes modulo 2*(8n). Returns carry*/
102			static int
103			add_blocks(int n, unsigned char left, const unsigned char right)
104			{
105			int i;
106			int carry = 0;
107			int sum;
108
109	✓✓	263444	for (i = 0; i < n; i++) {
110		125824	sum = (int)left[i] + (int)right[i] + carry;
111		125824	left[i] = sum & 0xff;
112		125824	carry = sum >> 8;
113			}
114		3932	return carry;
115			}
116
117			/* Xor two sequences of bytes */
118			static void
119			xor_blocks(unsigned char result, const unsigned char a,
120			const unsigned char *b, size_t len)
121			{
122			size_t i;
123
124	✓✓	2730384	for (i = 0; i < len; i++)
125		1304064	result[i] = a[i] ^ b[i];
126		40752	}
127
128			/*
129			* Calculate H(i+1) = Hash(Hi,Mi)
130			* Where H and M are 32 bytes long
131			*/
132			static int
133			hash_step(GOSTR341194_CTX c, unsigned char H, const unsigned char *M)
134			{
135		13584	unsigned char U[32], W[32], V[32], S[32], Key[32];
136			int i;
137
138			/* Compute first key */
139		6792	xor_blocks(W, H, M, 32);
140		6792	swap_bytes(W, Key);
141			/* Encrypt first 8 bytes of H with first key */
142		6792	Gost2814789_set_key(&c->cipher, Key, 256);
143		6792	Gost2814789_encrypt(H, S, &c->cipher);
144
145			/* Compute second key */
146		6792	circle_xor8(H, U);
147		6792	circle_xor8(M, V);
148		6792	circle_xor8(V, V);
149		6792	xor_blocks(W, U, V, 32);
150		6792	swap_bytes(W, Key);
151			/* encrypt second 8 bytes of H with second key */
152		6792	Gost2814789_set_key(&c->cipher, Key, 256);
153		6792	Gost2814789_encrypt(H+8, S+8, &c->cipher);
154
155			/* compute third key */
156		6792	circle_xor8(U, U);
157		6792	U[31] = ~U[31];
158		6792	U[29] = ~U[29];
159		6792	U[28] = ~U[28];
160		6792	U[24] = ~U[24];
161		6792	U[23] = ~U[23];
162		6792	U[20] = ~U[20];
163		6792	U[18] = ~U[18];
164		6792	U[17] = ~U[17];
165		6792	U[14] = ~U[14];
166		6792	U[12] = ~U[12];
167		6792	U[10] = ~U[10];
168		6792	U[8] = ~U[8];
169		6792	U[7] = ~U[7];
170		6792	U[5] = ~U[5];
171		6792	U[3] = ~U[3];
172		6792	U[1] = ~U[1];
173		6792	circle_xor8(V, V);
174		6792	circle_xor8(V, V);
175		6792	xor_blocks(W, U, V, 32);
176		6792	swap_bytes(W, Key);
177			/* encrypt third 8 bytes of H with third key */
178		6792	Gost2814789_set_key(&c->cipher, Key, 256);
179		6792	Gost2814789_encrypt(H+16, S+16, &c->cipher);
180
181			/* Compute fourth key */
182		6792	circle_xor8(U, U);
183		6792	circle_xor8(V, V);
184		6792	circle_xor8(V, V);
185		6792	xor_blocks(W, U, V, 32);
186		6792	swap_bytes(W, Key);
187			/* Encrypt last 8 bytes with fourth key */
188		6792	Gost2814789_set_key(&c->cipher, Key, 256);
189		6792	Gost2814789_encrypt(H+24, S+24, &c->cipher);
190
191	✓✓	176592	for (i = 0; i < 12; i++)
192		81504	transform_3(S);
193		6792	xor_blocks(S, S, M, 32);
194		6792	transform_3(S);
195		6792	xor_blocks(S, S, H, 32);
196	✓✓	842208	for (i = 0; i < 61; i++)
197		414312	transform_3(S);
198		6792	memcpy(H, S, 32);
199		6792	return 1;
200		6792	}
201
202			int
203			GOSTR341194_Init(GOSTR341194_CTX *c, int nid)
204			{
205		2872	memset(c, 0, sizeof(*c));
206		1436	return Gost2814789_set_sbox(&c->cipher, nid);
207			}
208
209			static void
210			GOSTR341194_block_data_order(GOSTR341194_CTX ctx, const unsigned char p,
211			size_t num)
212			{
213			int i;
214
215	✓✓	16710	for (i = 0; i < num; i++) {
216		3342	hash_step(ctx, ctx->H, p);
217		3342	add_blocks(32, ctx->S, p);
218		3342	p += 32;
219			}
220		3342	}
221
222			#define DATA_ORDER_IS_LITTLE_ENDIAN
223
224			#define HASH_CBLOCK GOSTR341194_CBLOCK
225			#define HASH_LONG GOSTR341194_LONG
226			#define HASH_CTX GOSTR341194_CTX
227			#define HASH_UPDATE GOSTR341194_Update
228			#define HASH_TRANSFORM GOSTR341194_Transform
229			#define HASH_NO_FINAL 1
230			#define HASH_BLOCK_DATA_ORDER GOSTR341194_block_data_order
231
232			#include "md32_common.h"
233
234			int
235			GOSTR341194_Final(unsigned char md, GOSTR341194_CTX c)
236			{
237		2860	unsigned char p = (unsigned char )c->data;
238		1430	unsigned char T[32];
239
240	✓✓	1430	if (c->num > 0) {
241		590	memset(p + c->num, 0, 32 - c->num);
242		590	hash_step(c, c->H, p);
243		590	add_blocks(32, c->S, p);
244		590	}
245
246		1430	p = T;
247		1430	HOST_l2c(c->Nl, p);
248		1430	HOST_l2c(c->Nh, p);
249		1430	memset(p, 0, 32 - 8);
250		1430	hash_step(c, c->H, T);
251		1430	hash_step(c, c->H, c->S);
252
253		1430	memcpy(md, c->H, 32);
254
255		1430	return 1;
256		1430	}
257
258			unsigned char *
259			GOSTR341194(const unsigned char d, size_t n, unsigned char md, int nid)
260			{
261			GOSTR341194_CTX c;
262			static unsigned char m[GOSTR341194_LENGTH];
263
264			if (md == NULL)
265			md = m;
266			if (!GOSTR341194_Init(&c, nid))
267			return 0;
268			GOSTR341194_Update(&c, d, n);
269			GOSTR341194_Final(md, &c);
270			explicit_bzero(&c, sizeof(c));
271			return (md);
272			}
273			#endif