Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/ec/ecp_mont.c	Lines:	63	92	68.5 %
Date:	2017-11-07	Branches:	20	40	50.0 %


/* $OpenBSD: ecp_mont.c,v 1.11 2017/01/29 17:49:23 beck Exp $ */
/*
 * Originally written by Bodo Moeller for the OpenSSL project.
 */
/* ====================================================================
 * Copyright (c) 1998-2001 The OpenSSL Project.  All rights reserved.
 *
 * 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.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */
/* ====================================================================
 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 * Portions of this software developed by SUN MICROSYSTEMS, INC.,
 * and contributed to the OpenSSL project.
 */

#include <openssl/err.h>

#include "ec_lcl.h"


const EC_METHOD *
EC_GFp_mont_method(void)
{
	static const EC_METHOD ret = {
		.flags = EC_FLAGS_DEFAULT_OCT,
		.field_type = NID_X9_62_prime_field,
		.group_init = ec_GFp_mont_group_init,
		.group_finish = ec_GFp_mont_group_finish,
		.group_clear_finish = ec_GFp_mont_group_clear_finish,
		.group_copy = ec_GFp_mont_group_copy,
		.group_set_curve = ec_GFp_mont_group_set_curve,
		.group_get_curve = ec_GFp_simple_group_get_curve,
		.group_get_degree = ec_GFp_simple_group_get_degree,
		.group_check_discriminant =
		ec_GFp_simple_group_check_discriminant,
		.point_init = ec_GFp_simple_point_init,
		.point_finish = ec_GFp_simple_point_finish,
		.point_clear_finish = ec_GFp_simple_point_clear_finish,
		.point_copy = ec_GFp_simple_point_copy,
		.point_set_to_infinity = ec_GFp_simple_point_set_to_infinity,
		.point_set_Jprojective_coordinates_GFp =
		ec_GFp_simple_set_Jprojective_coordinates_GFp,
		.point_get_Jprojective_coordinates_GFp =
		ec_GFp_simple_get_Jprojective_coordinates_GFp,
		.point_set_affine_coordinates =
		ec_GFp_simple_point_set_affine_coordinates,
		.point_get_affine_coordinates =
		ec_GFp_simple_point_get_affine_coordinates,
		.add = ec_GFp_simple_add,
		.dbl = ec_GFp_simple_dbl,
		.invert = ec_GFp_simple_invert,
		.is_at_infinity = ec_GFp_simple_is_at_infinity,
		.is_on_curve = ec_GFp_simple_is_on_curve,
		.point_cmp = ec_GFp_simple_cmp,
		.make_affine = ec_GFp_simple_make_affine,
		.points_make_affine = ec_GFp_simple_points_make_affine,
		.field_mul = ec_GFp_mont_field_mul,
		.field_sqr = ec_GFp_mont_field_sqr,
		.field_encode = ec_GFp_mont_field_encode,
		.field_decode = ec_GFp_mont_field_decode,
		.field_set_to_one = ec_GFp_mont_field_set_to_one
	};

	return &ret;
}


int
ec_GFp_mont_group_init(EC_GROUP * group)
{
	int ok;

	ok = ec_GFp_simple_group_init(group);
	group->field_data1 = NULL;
	group->field_data2 = NULL;
	return ok;
}


void
ec_GFp_mont_group_finish(EC_GROUP * group)
{
	BN_MONT_CTX_free(group->field_data1);
	group->field_data1 = NULL;
	BN_free(group->field_data2);
	group->field_data2 = NULL;
	ec_GFp_simple_group_finish(group);
}


void
ec_GFp_mont_group_clear_finish(EC_GROUP * group)
{
	BN_MONT_CTX_free(group->field_data1);
	group->field_data1 = NULL;
	BN_clear_free(group->field_data2);
	group->field_data2 = NULL;
	ec_GFp_simple_group_clear_finish(group);
}


int
ec_GFp_mont_group_copy(EC_GROUP * dest, const EC_GROUP * src)
{
	BN_MONT_CTX_free(dest->field_data1);
	dest->field_data1 = NULL;
	BN_clear_free(dest->field_data2);
	dest->field_data2 = NULL;

	if (!ec_GFp_simple_group_copy(dest, src))
		return 0;

	if (src->field_data1 != NULL) {
		dest->field_data1 = BN_MONT_CTX_new();
		if (dest->field_data1 == NULL)
			return 0;
		if (!BN_MONT_CTX_copy(dest->field_data1, src->field_data1))
			goto err;
	}
	if (src->field_data2 != NULL) {
		dest->field_data2 = BN_dup(src->field_data2);
		if (dest->field_data2 == NULL)
			goto err;
	}
	return 1;

err:
	if (dest->field_data1 != NULL) {
		BN_MONT_CTX_free(dest->field_data1);
		dest->field_data1 = NULL;
	}
	return 0;
}


int
ec_GFp_mont_group_set_curve(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a,
    const BIGNUM *b, BN_CTX *ctx)
{
	BN_CTX *new_ctx = NULL;
	BN_MONT_CTX *mont = NULL;
	BIGNUM *one = NULL;
	int ret = 0;

	BN_MONT_CTX_free(group->field_data1);
	group->field_data1 = NULL;
	BN_free(group->field_data2);
	group->field_data2 = NULL;
	if (ctx == NULL) {
		ctx = new_ctx = BN_CTX_new();
		if (ctx == NULL)
			return 0;
	}
	mont = BN_MONT_CTX_new();
	if (mont == NULL)
		goto err;
	if (!BN_MONT_CTX_set(mont, p, ctx)) {
		ECerror(ERR_R_BN_LIB);
		goto err;
	}
	one = BN_new();
	if (one == NULL)
		goto err;
	if (!BN_to_montgomery(one, BN_value_one(), mont, ctx))
		goto err;

	group->field_data1 = mont;
	mont = NULL;
	group->field_data2 = one;
	one = NULL;

	ret = ec_GFp_simple_group_set_curve(group, p, a, b, ctx);

	if (!ret) {
		BN_MONT_CTX_free(group->field_data1);
		group->field_data1 = NULL;
		BN_free(group->field_data2);
		group->field_data2 = NULL;
	}
err:
	BN_CTX_free(new_ctx);
	BN_MONT_CTX_free(mont);
	BN_free(one);
	return ret;
}


int
ec_GFp_mont_field_mul(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a,
    const BIGNUM *b, BN_CTX *ctx)
{
	if (group->field_data1 == NULL) {
		ECerror(EC_R_NOT_INITIALIZED);
		return 0;
	}
	return BN_mod_mul_montgomery(r, a, b, group->field_data1, ctx);
}


int
ec_GFp_mont_field_sqr(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a,
    BN_CTX *ctx)
{
	if (group->field_data1 == NULL) {
		ECerror(EC_R_NOT_INITIALIZED);
		return 0;
	}
	return BN_mod_mul_montgomery(r, a, a, group->field_data1, ctx);
}


int
ec_GFp_mont_field_encode(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a,
    BN_CTX *ctx)
{
	if (group->field_data1 == NULL) {
		ECerror(EC_R_NOT_INITIALIZED);
		return 0;
	}
	return BN_to_montgomery(r, a, (BN_MONT_CTX *) group->field_data1, ctx);
}


int
ec_GFp_mont_field_decode(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a,
    BN_CTX *ctx)
{
	if (group->field_data1 == NULL) {
		ECerror(EC_R_NOT_INITIALIZED);
		return 0;
	}
	return BN_from_montgomery(r, a, group->field_data1, ctx);
}


int
ec_GFp_mont_field_set_to_one(const EC_GROUP *group, BIGNUM *r, BN_CTX *ctx)
{
	if (group->field_data2 == NULL) {
		ECerror(EC_R_NOT_INITIALIZED);
		return 0;
	}
	if (!BN_copy(r, group->field_data2))
		return 0;
	return 1;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: ecp_mont.c,v 1.11 2017/01/29 17:49:23 beck Exp $ */
2			/*
3			* Originally written by Bodo Moeller for the OpenSSL project.
4			*/
5			/* ====================================================================
6			* Copyright (c) 1998-2001 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			* openssl-core@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			* This product includes cryptographic software written by Eric Young
54			* (eay@cryptsoft.com). This product includes software written by Tim
55			* Hudson (tjh@cryptsoft.com).
56			*
57			*/
58			/* ====================================================================
59			* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
60			* Portions of this software developed by SUN MICROSYSTEMS, INC.,
61			* and contributed to the OpenSSL project.
62			*/
63
64			#include <openssl/err.h>
65
66			#include "ec_lcl.h"
67
68
69			const EC_METHOD *
70			EC_GFp_mont_method(void)
71			{
72			static const EC_METHOD ret = {
73			.flags = EC_FLAGS_DEFAULT_OCT,
74			.field_type = NID_X9_62_prime_field,
75			.group_init = ec_GFp_mont_group_init,
76			.group_finish = ec_GFp_mont_group_finish,
77			.group_clear_finish = ec_GFp_mont_group_clear_finish,
78			.group_copy = ec_GFp_mont_group_copy,
79			.group_set_curve = ec_GFp_mont_group_set_curve,
80			.group_get_curve = ec_GFp_simple_group_get_curve,
81			.group_get_degree = ec_GFp_simple_group_get_degree,
82			.group_check_discriminant =
83			ec_GFp_simple_group_check_discriminant,
84			.point_init = ec_GFp_simple_point_init,
85			.point_finish = ec_GFp_simple_point_finish,
86			.point_clear_finish = ec_GFp_simple_point_clear_finish,
87			.point_copy = ec_GFp_simple_point_copy,
88			.point_set_to_infinity = ec_GFp_simple_point_set_to_infinity,
89			.point_set_Jprojective_coordinates_GFp =
90			ec_GFp_simple_set_Jprojective_coordinates_GFp,
91			.point_get_Jprojective_coordinates_GFp =
92			ec_GFp_simple_get_Jprojective_coordinates_GFp,
93			.point_set_affine_coordinates =
94			ec_GFp_simple_point_set_affine_coordinates,
95			.point_get_affine_coordinates =
96			ec_GFp_simple_point_get_affine_coordinates,
97			.add = ec_GFp_simple_add,
98			.dbl = ec_GFp_simple_dbl,
99			.invert = ec_GFp_simple_invert,
100			.is_at_infinity = ec_GFp_simple_is_at_infinity,
101			.is_on_curve = ec_GFp_simple_is_on_curve,
102			.point_cmp = ec_GFp_simple_cmp,
103			.make_affine = ec_GFp_simple_make_affine,
104			.points_make_affine = ec_GFp_simple_points_make_affine,
105			.field_mul = ec_GFp_mont_field_mul,
106			.field_sqr = ec_GFp_mont_field_sqr,
107			.field_encode = ec_GFp_mont_field_encode,
108			.field_decode = ec_GFp_mont_field_decode,
109			.field_set_to_one = ec_GFp_mont_field_set_to_one
110			};
111
112		5194	return &ret;
113			}
114
115
116			int
117			ec_GFp_mont_group_init(EC_GROUP * group)
118			{
119			int ok;
120
121		10806	ok = ec_GFp_simple_group_init(group);
122		5403	group->field_data1 = NULL;
123		5403	group->field_data2 = NULL;
124		5403	return ok;
125			}
126
127
128			void
129			ec_GFp_mont_group_finish(EC_GROUP * group)
130			{
131		10804	BN_MONT_CTX_free(group->field_data1);
132		5402	group->field_data1 = NULL;
133		5402	BN_free(group->field_data2);
134		5402	group->field_data2 = NULL;
135		5402	ec_GFp_simple_group_finish(group);
136		5402	}
137
138
139			void
140			ec_GFp_mont_group_clear_finish(EC_GROUP * group)
141			{
142			BN_MONT_CTX_free(group->field_data1);
143			group->field_data1 = NULL;
144			BN_clear_free(group->field_data2);
145			group->field_data2 = NULL;
146			ec_GFp_simple_group_clear_finish(group);
147			}
148
149
150			int
151			ec_GFp_mont_group_copy(EC_GROUP * dest, const EC_GROUP * src)
152			{
153		5612	BN_MONT_CTX_free(dest->field_data1);
154		2806	dest->field_data1 = NULL;
155		2806	BN_clear_free(dest->field_data2);
156		2806	dest->field_data2 = NULL;
157
158	✗✓	2806	if (!ec_GFp_simple_group_copy(dest, src))
159			return 0;
160
161	✓✗	2806	if (src->field_data1 != NULL) {
162		2806	dest->field_data1 = BN_MONT_CTX_new();
163	✗✓	2806	if (dest->field_data1 == NULL)
164			return 0;
165	✓✗	2806	if (!BN_MONT_CTX_copy(dest->field_data1, src->field_data1))
166			goto err;
167			}
168	✓✗	2806	if (src->field_data2 != NULL) {
169		2806	dest->field_data2 = BN_dup(src->field_data2);
170	✓✗	2806	if (dest->field_data2 == NULL)
171			goto err;
172			}
173		2806	return 1;
174
175			err:
176			if (dest->field_data1 != NULL) {
177			BN_MONT_CTX_free(dest->field_data1);
178			dest->field_data1 = NULL;
179			}
180			return 0;
181		2806	}
182
183
184			int
185			ec_GFp_mont_group_set_curve(EC_GROUP group, const BIGNUM p, const BIGNUM *a,
186			const BIGNUM b, BN_CTX ctx)
187			{
188			BN_CTX *new_ctx = NULL;
189			BN_MONT_CTX *mont = NULL;
190			BIGNUM *one = NULL;
191			int ret = 0;
192
193		5266	BN_MONT_CTX_free(group->field_data1);
194		2633	group->field_data1 = NULL;
195		2633	BN_free(group->field_data2);
196		2633	group->field_data2 = NULL;
197	✓✓	2633	if (ctx == NULL) {
198		102	ctx = new_ctx = BN_CTX_new();
199	✗✓	102	if (ctx == NULL)
200			return 0;
201			}
202		2633	mont = BN_MONT_CTX_new();
203	✓✗	2633	if (mont == NULL)
204			goto err;
205	✗✓	2633	if (!BN_MONT_CTX_set(mont, p, ctx)) {
206			ECerror(ERR_R_BN_LIB);
207			goto err;
208			}
209		2633	one = BN_new();
210	✓✗	2633	if (one == NULL)
211			goto err;
212	✓✗	2633	if (!BN_to_montgomery(one, BN_value_one(), mont, ctx))
213			goto err;
214
215		2633	group->field_data1 = mont;
216			mont = NULL;
217		2633	group->field_data2 = one;
218			one = NULL;
219
220		2633	ret = ec_GFp_simple_group_set_curve(group, p, a, b, ctx);
221
222	✗✓	2633	if (!ret) {
223			BN_MONT_CTX_free(group->field_data1);
224			group->field_data1 = NULL;
225			BN_free(group->field_data2);
226			group->field_data2 = NULL;
227			}
228			err:
229		2633	BN_CTX_free(new_ctx);
230		2633	BN_MONT_CTX_free(mont);
231		2633	BN_free(one);
232		2633	return ret;
233		2633	}
234
235
236			int
237			ec_GFp_mont_field_mul(const EC_GROUP group, BIGNUM r, const BIGNUM *a,
238			const BIGNUM b, BN_CTX ctx)
239			{
240	✗✓	19331734	if (group->field_data1 == NULL) {
241			ECerror(EC_R_NOT_INITIALIZED);
242			return 0;
243			}
244		9665867	return BN_mod_mul_montgomery(r, a, b, group->field_data1, ctx);
245		9665867	}
246
247
248			int
249			ec_GFp_mont_field_sqr(const EC_GROUP group, BIGNUM r, const BIGNUM *a,
250			BN_CTX *ctx)
251			{
252	✗✓	16221536	if (group->field_data1 == NULL) {
253			ECerror(EC_R_NOT_INITIALIZED);
254			return 0;
255			}
256		8110768	return BN_mod_mul_montgomery(r, a, a, group->field_data1, ctx);
257		8110768	}
258
259
260			int
261			ec_GFp_mont_field_encode(const EC_GROUP group, BIGNUM r, const BIGNUM *a,
262			BN_CTX *ctx)
263			{
264	✗✓	49696	if (group->field_data1 == NULL) {
265			ECerror(EC_R_NOT_INITIALIZED);
266			return 0;
267			}
268		24848	return BN_to_montgomery(r, a, (BN_MONT_CTX *) group->field_data1, ctx);
269		24848	}
270
271
272			int
273			ec_GFp_mont_field_decode(const EC_GROUP group, BIGNUM r, const BIGNUM *a,
274			BN_CTX *ctx)
275			{
276	✗✓	20048	if (group->field_data1 == NULL) {
277			ECerror(EC_R_NOT_INITIALIZED);
278			return 0;
279			}
280		10024	return BN_from_montgomery(r, a, group->field_data1, ctx);
281		10024	}
282
283
284			int
285			ec_GFp_mont_field_set_to_one(const EC_GROUP group, BIGNUM r, BN_CTX *ctx)
286			{
287	✗✓	95826	if (group->field_data2 == NULL) {
288			ECerror(EC_R_NOT_INITIALIZED);
289			return 0;
290			}
291	✗✓	47913	if (!BN_copy(r, group->field_data2))
292			return 0;
293		47913	return 1;
294		47913	}