Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/ecdsa/ecs_lib.c	Lines:	49	88	55.7 %
Date:	2017-11-13	Branches:	14	36	38.9 %


/* $OpenBSD: ecs_lib.c,v 1.12 2017/05/02 03:59:44 deraadt Exp $ */
/* ====================================================================
 * Copyright (c) 1998-2005 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).
 *
 */

#include <string.h>

#include <openssl/opensslconf.h>

#include "ecs_locl.h"
#ifndef OPENSSL_NO_ENGINE
#include <openssl/engine.h>
#endif
#include <openssl/err.h>
#include <openssl/bn.h>

static const ECDSA_METHOD *default_ECDSA_method = NULL;

static void *ecdsa_data_new(void);
static void *ecdsa_data_dup(void *);
static void  ecdsa_data_free(void *);

void
ECDSA_set_default_method(const ECDSA_METHOD *meth)
{
	default_ECDSA_method = meth;
}

const ECDSA_METHOD *
ECDSA_get_default_method(void)
{
	if (!default_ECDSA_method) {
		default_ECDSA_method = ECDSA_OpenSSL();
	}
	return default_ECDSA_method;
}

int
ECDSA_set_method(EC_KEY *eckey, const ECDSA_METHOD *meth)
{
	ECDSA_DATA *ecdsa;

	ecdsa = ecdsa_check(eckey);

	if (ecdsa == NULL)
		return 0;

#ifndef OPENSSL_NO_ENGINE
	if (ecdsa->engine) {
		ENGINE_finish(ecdsa->engine);
		ecdsa->engine = NULL;
	}
#endif
	ecdsa->meth = meth;

	return 1;
}

static ECDSA_DATA *
ECDSA_DATA_new_method(ENGINE *engine)
{
	ECDSA_DATA *ret;

	ret = malloc(sizeof(ECDSA_DATA));
	if (ret == NULL) {
		ECDSAerror(ERR_R_MALLOC_FAILURE);
		return (NULL);
	}

	ret->init = NULL;

	ret->meth = ECDSA_get_default_method();
	ret->engine = engine;
#ifndef OPENSSL_NO_ENGINE
	if (!ret->engine)
		ret->engine = ENGINE_get_default_ECDSA();
	if (ret->engine) {
		ret->meth = ENGINE_get_ECDSA(ret->engine);
		if (!ret->meth) {
			ECDSAerror(ERR_R_ENGINE_LIB);
			ENGINE_finish(ret->engine);
			free(ret);
			return NULL;
		}
	}
#endif

	ret->flags = ret->meth->flags;
	CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ECDSA, ret, &ret->ex_data);
	return (ret);
}

static void *
ecdsa_data_new(void)
{
	return (void *)ECDSA_DATA_new_method(NULL);
}

static void *
ecdsa_data_dup(void *data)
{
	ECDSA_DATA *r = (ECDSA_DATA *)data;

	/* XXX: dummy operation */
	if (r == NULL)
		return NULL;

	return ecdsa_data_new();
}

static void
ecdsa_data_free(void *data)
{
	ECDSA_DATA *r = (ECDSA_DATA *)data;

#ifndef OPENSSL_NO_ENGINE
	if (r->engine)
		ENGINE_finish(r->engine);
#endif
	CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDSA, r, &r->ex_data);

	freezero(r, sizeof(ECDSA_DATA));
}

ECDSA_DATA *
ecdsa_check(EC_KEY *key)
{
	ECDSA_DATA *ecdsa_data;

	void *data = EC_KEY_get_key_method_data(key, ecdsa_data_dup,
	    ecdsa_data_free, ecdsa_data_free);
	if (data == NULL) {
		ecdsa_data = (ECDSA_DATA *)ecdsa_data_new();
		if (ecdsa_data == NULL)
			return NULL;
		data = EC_KEY_insert_key_method_data(key, (void *)ecdsa_data,
		    ecdsa_data_dup, ecdsa_data_free, ecdsa_data_free);
		if (data != NULL) {
			/* Another thread raced us to install the key_method
			 * data and won. */
			ecdsa_data_free(ecdsa_data);
			ecdsa_data = (ECDSA_DATA *)data;
		}
	} else
		ecdsa_data = (ECDSA_DATA *)data;

	return ecdsa_data;
}

int
ECDSA_size(const EC_KEY *r)
{
	int ret, i;
	ASN1_INTEGER bs;
	BIGNUM	*order = NULL;
	unsigned char buf[4];
	const EC_GROUP *group;

	if (r == NULL)
		return 0;
	group = EC_KEY_get0_group(r);
	if (group == NULL)
		return 0;

	if ((order = BN_new()) == NULL)
		return 0;
	if (!EC_GROUP_get_order(group, order, NULL)) {
		BN_clear_free(order);
		return 0;
	}
	i = BN_num_bits(order);
	bs.length = (i + 7) / 8;
	bs.data = buf;
	bs.type = V_ASN1_INTEGER;
	/* If the top bit is set the asn1 encoding is 1 larger. */
	buf[0] = 0xff;

	i = i2d_ASN1_INTEGER(&bs, NULL);
	i += i; /* r and s */
	ret = ASN1_object_size(1, i, V_ASN1_SEQUENCE);
	BN_clear_free(order);
	return (ret);
}

int
ECDSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
    CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
{
	return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ECDSA, argl, argp,
	    new_func, dup_func, free_func);
}

int
ECDSA_set_ex_data(EC_KEY *d, int idx, void *arg)
{
	ECDSA_DATA *ecdsa;
	ecdsa = ecdsa_check(d);
	if (ecdsa == NULL)
		return 0;
	return (CRYPTO_set_ex_data(&ecdsa->ex_data, idx, arg));
}

void *
ECDSA_get_ex_data(EC_KEY *d, int idx)
{
	ECDSA_DATA *ecdsa;
	ecdsa = ecdsa_check(d);
	if (ecdsa == NULL)
		return NULL;
	return (CRYPTO_get_ex_data(&ecdsa->ex_data, idx));
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: ecs_lib.c,v 1.12 2017/05/02 03:59:44 deraadt Exp $ */
2			/* ====================================================================
3			* Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved.
4			*
5			* Redistribution and use in source and binary forms, with or without
6			* modification, are permitted provided that the following conditions
7			* are met:
8			*
9			* 1. Redistributions of source code must retain the above copyright
10			* notice, this list of conditions and the following disclaimer.
11			*
12			* 2. Redistributions in binary form must reproduce the above copyright
13			* notice, this list of conditions and the following disclaimer in
14			* the documentation and/or other materials provided with the
15			* distribution.
16			*
17			* 3. All advertising materials mentioning features or use of this
18			* software must display the following acknowledgment:
19			* "This product includes software developed by the OpenSSL Project
20			* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
21			*
22			* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
23			* endorse or promote products derived from this software without
24			* prior written permission. For written permission, please contact
25			* openssl-core@OpenSSL.org.
26			*
27			* 5. Products derived from this software may not be called "OpenSSL"
28			* nor may "OpenSSL" appear in their names without prior written
29			* permission of the OpenSSL Project.
30			*
31			* 6. Redistributions of any form whatsoever must retain the following
32			* acknowledgment:
33			* "This product includes software developed by the OpenSSL Project
34			* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
35			*
36			* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
37			* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
38			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
39			* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
40			* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41			* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
42			* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
43			* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
44			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
45			* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
46			* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
47			* OF THE POSSIBILITY OF SUCH DAMAGE.
48			* ====================================================================
49			*
50			* This product includes cryptographic software written by Eric Young
51			* (eay@cryptsoft.com). This product includes software written by Tim
52			* Hudson (tjh@cryptsoft.com).
53			*
54			*/
55
56			#include <string.h>
57
58			#include <openssl/opensslconf.h>
59
60			#include "ecs_locl.h"
61			#ifndef OPENSSL_NO_ENGINE
62			#include <openssl/engine.h>
63			#endif
64			#include <openssl/err.h>
65			#include <openssl/bn.h>
66
67			static const ECDSA_METHOD *default_ECDSA_method = NULL;
68
69			static void *ecdsa_data_new(void);
70			static void ecdsa_data_dup(void );
71			static void ecdsa_data_free(void *);
72
73			void
74			ECDSA_set_default_method(const ECDSA_METHOD *meth)
75			{
76			default_ECDSA_method = meth;
77			}
78
79			const ECDSA_METHOD *
80			ECDSA_get_default_method(void)
81			{
82	✓✓	912	if (!default_ECDSA_method) {
83		3	default_ECDSA_method = ECDSA_OpenSSL();
84		3	}
85		456	return default_ECDSA_method;
86			}
87
88			int
89			ECDSA_set_method(EC_KEY eckey, const ECDSA_METHOD meth)
90			{
91			ECDSA_DATA *ecdsa;
92
93			ecdsa = ecdsa_check(eckey);
94
95			if (ecdsa == NULL)
96			return 0;
97
98			#ifndef OPENSSL_NO_ENGINE
99			if (ecdsa->engine) {
100			ENGINE_finish(ecdsa->engine);
101			ecdsa->engine = NULL;
102			}
103			#endif
104			ecdsa->meth = meth;
105
106			return 1;
107			}
108
109			static ECDSA_DATA *
110			ECDSA_DATA_new_method(ENGINE *engine)
111			{
112			ECDSA_DATA *ret;
113
114		912	ret = malloc(sizeof(ECDSA_DATA));
115	✗✓	456	if (ret == NULL) {
116			ECDSAerror(ERR_R_MALLOC_FAILURE);
117			return (NULL);
118			}
119
120		456	ret->init = NULL;
121
122		456	ret->meth = ECDSA_get_default_method();
123		456	ret->engine = engine;
124			#ifndef OPENSSL_NO_ENGINE
125	✓✗	456	if (!ret->engine)
126		456	ret->engine = ENGINE_get_default_ECDSA();
127	✗✓	456	if (ret->engine) {
128			ret->meth = ENGINE_get_ECDSA(ret->engine);
129			if (!ret->meth) {
130			ECDSAerror(ERR_R_ENGINE_LIB);
131			ENGINE_finish(ret->engine);
132			free(ret);
133			return NULL;
134			}
135			}
136			#endif
137
138		456	ret->flags = ret->meth->flags;
139		456	CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ECDSA, ret, &ret->ex_data);
140		456	return (ret);
141		456	}
142
143			static void *
144			ecdsa_data_new(void)
145			{
146		912	return (void *)ECDSA_DATA_new_method(NULL);
147			}
148
149			static void *
150			ecdsa_data_dup(void *data)
151			{
152			ECDSA_DATA r = (ECDSA_DATA )data;
153
154			/* XXX: dummy operation */
155			if (r == NULL)
156			return NULL;
157
158			return ecdsa_data_new();
159			}
160
161			static void
162			ecdsa_data_free(void *data)
163			{
164		912	ECDSA_DATA r = (ECDSA_DATA )data;
165
166			#ifndef OPENSSL_NO_ENGINE
167	✗✓	456	if (r->engine)
168			ENGINE_finish(r->engine);
169			#endif
170		456	CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDSA, r, &r->ex_data);
171
172		456	freezero(r, sizeof(ECDSA_DATA));
173		456	}
174
175			ECDSA_DATA *
176			ecdsa_check(EC_KEY *key)
177			{
178			ECDSA_DATA *ecdsa_data;
179
180		3648	void *data = EC_KEY_get_key_method_data(key, ecdsa_data_dup,
181			ecdsa_data_free, ecdsa_data_free);
182	✓✓	1824	if (data == NULL) {
183		456	ecdsa_data = (ECDSA_DATA *)ecdsa_data_new();
184	✗✓	456	if (ecdsa_data == NULL)
185			return NULL;
186		456	data = EC_KEY_insert_key_method_data(key, (void *)ecdsa_data,
187			ecdsa_data_dup, ecdsa_data_free, ecdsa_data_free);
188	✗✓	456	if (data != NULL) {
189			/* Another thread raced us to install the key_method
190			* data and won. */
191			ecdsa_data_free(ecdsa_data);
192			ecdsa_data = (ECDSA_DATA *)data;
193			}
194			} else
195		1368	ecdsa_data = (ECDSA_DATA *)data;
196
197		1824	return ecdsa_data;
198		1824	}
199
200			int
201			ECDSA_size(const EC_KEY *r)
202			{
203			int ret, i;
204		456	ASN1_INTEGER bs;
205			BIGNUM *order = NULL;
206		228	unsigned char buf[4];
207			const EC_GROUP *group;
208
209	✗✓	228	if (r == NULL)
210			return 0;
211		228	group = EC_KEY_get0_group(r);
212	✗✓	228	if (group == NULL)
213			return 0;
214
215	✗✓	228	if ((order = BN_new()) == NULL)
216			return 0;
217	✗✓	228	if (!EC_GROUP_get_order(group, order, NULL)) {
218			BN_clear_free(order);
219			return 0;
220			}
221		228	i = BN_num_bits(order);
222		228	bs.length = (i + 7) / 8;
223		228	bs.data = buf;
224		228	bs.type = V_ASN1_INTEGER;
225			/* If the top bit is set the asn1 encoding is 1 larger. */
226		228	buf[0] = 0xff;
227
228		228	i = i2d_ASN1_INTEGER(&bs, NULL);
229		228	i += i; /* r and s */
230		228	ret = ASN1_object_size(1, i, V_ASN1_SEQUENCE);
231		228	BN_clear_free(order);
232		228	return (ret);
233		228	}
234
235			int
236			ECDSA_get_ex_new_index(long argl, void argp, CRYPTO_EX_new new_func,
237			CRYPTO_EX_dup dup_func, CRYPTO_EX_free free_func)
238			{
239			return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ECDSA, argl, argp,
240			new_func, dup_func, free_func);
241			}
242
243			int
244			ECDSA_set_ex_data(EC_KEY d, int idx, void arg)
245			{
246			ECDSA_DATA *ecdsa;
247			ecdsa = ecdsa_check(d);
248			if (ecdsa == NULL)
249			return 0;
250			return (CRYPTO_set_ex_data(&ecdsa->ex_data, idx, arg));
251			}
252
253			void *
254			ECDSA_get_ex_data(EC_KEY *d, int idx)
255			{
256			ECDSA_DATA *ecdsa;
257			ecdsa = ecdsa_check(d);
258			if (ecdsa == NULL)
259			return NULL;
260			return (CRYPTO_get_ex_data(&ecdsa->ex_data, idx));
261			}