Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/crypto/../../libssl/src/crypto/dsa/dsa_key.c	Lines:	24	34	70.6 %
Date:	2016-12-06	Branches:	13	26	50.0 %


/* $OpenBSD: dsa_key.c,v 1.22 2016/06/30 02:02:06 bcook Exp $ */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 *
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 *
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 *
 * 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 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 acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 *
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS 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 AUTHOR OR 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.
 *
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

#include <stdio.h>
#include <time.h>

#include <openssl/opensslconf.h>

#ifndef OPENSSL_NO_SHA

#include <openssl/bn.h>
#include <openssl/dsa.h>

static int dsa_builtin_keygen(DSA *dsa);

int
DSA_generate_key(DSA *dsa)
{
	if (dsa->meth->dsa_keygen)
		return dsa->meth->dsa_keygen(dsa);
	return dsa_builtin_keygen(dsa);
}

static int
dsa_builtin_keygen(DSA *dsa)
{
	int ok = 0;
	BN_CTX *ctx = NULL;
	BIGNUM *pub_key = NULL, *priv_key = NULL;

	if ((ctx = BN_CTX_new()) == NULL)
		goto err;

	if (dsa->priv_key == NULL) {
		if ((priv_key = BN_new()) == NULL)
			goto err;
	} else
		priv_key=dsa->priv_key;

	do {
		if (!BN_rand_range(priv_key, dsa->q))
			goto err;
	} while (BN_is_zero(priv_key));

	if (dsa->pub_key == NULL) {
		if ((pub_key = BN_new()) == NULL)
			goto err;
	} else
		pub_key=dsa->pub_key;

	{
		BIGNUM prk;

		BN_with_flags(&prk, priv_key, BN_FLG_CONSTTIME);

		if (!BN_mod_exp(pub_key, dsa->g, &prk, dsa->p, ctx))
			goto err;
	}

	dsa->priv_key = priv_key;
	dsa->pub_key = pub_key;
	ok = 1;

err:
	if (pub_key != NULL && dsa->pub_key == NULL)
		BN_free(pub_key);
	if (priv_key != NULL && dsa->priv_key == NULL)
		BN_free(priv_key);
	BN_CTX_free(ctx);
	return ok;
}
#endif


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: dsa_key.c,v 1.22 2016/06/30 02:02:06 bcook Exp $ */
2			/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3			* All rights reserved.
4			*
5			* This package is an SSL implementation written
6			* by Eric Young (eay@cryptsoft.com).
7			* The implementation was written so as to conform with Netscapes SSL.
8			*
9			* This library is free for commercial and non-commercial use as long as
10			* the following conditions are aheared to. The following conditions
11			* apply to all code found in this distribution, be it the RC4, RSA,
12			* lhash, DES, etc., code; not just the SSL code. The SSL documentation
13			* included with this distribution is covered by the same copyright terms
14			* except that the holder is Tim Hudson (tjh@cryptsoft.com).
15			*
16			* Copyright remains Eric Young's, and as such any Copyright notices in
17			* the code are not to be removed.
18			* If this package is used in a product, Eric Young should be given attribution
19			* as the author of the parts of the library used.
20			* This can be in the form of a textual message at program startup or
21			* in documentation (online or textual) provided with the package.
22			*
23			* Redistribution and use in source and binary forms, with or without
24			* modification, are permitted provided that the following conditions
25			* are met:
26			* 1. Redistributions of source code must retain the copyright
27			* notice, this list of conditions and the following disclaimer.
28			* 2. Redistributions in binary form must reproduce the above copyright
29			* notice, this list of conditions and the following disclaimer in the
30			* documentation and/or other materials provided with the distribution.
31			* 3. All advertising materials mentioning features or use of this software
32			* must display the following acknowledgement:
33			* "This product includes cryptographic software written by
34			* Eric Young (eay@cryptsoft.com)"
35			* The word 'cryptographic' can be left out if the rouines from the library
36			* being used are not cryptographic related :-).
37			* 4. If you include any Windows specific code (or a derivative thereof) from
38			* the apps directory (application code) you must include an acknowledgement:
39			* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40			*
41			* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44			* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51			* SUCH DAMAGE.
52			*
53			* The licence and distribution terms for any publically available version or
54			* derivative of this code cannot be changed. i.e. this code cannot simply be
55			* copied and put under another distribution licence
56			* [including the GNU Public Licence.]
57			*/
58
59			#include <stdio.h>
60			#include <time.h>
61
62			#include <openssl/opensslconf.h>
63
64			#ifndef OPENSSL_NO_SHA
65
66			#include <openssl/bn.h>
67			#include <openssl/dsa.h>
68
69			static int dsa_builtin_keygen(DSA *dsa);
70
71			int
72			DSA_generate_key(DSA *dsa)
73		2	{
74	✗✓	2	if (dsa->meth->dsa_keygen)
75			return dsa->meth->dsa_keygen(dsa);
76		2	return dsa_builtin_keygen(dsa);
77			}
78
79			static int
80			dsa_builtin_keygen(DSA *dsa)
81		2	{
82		2	int ok = 0;
83		2	BN_CTX *ctx = NULL;
84		2	BIGNUM pub_key = NULL, priv_key = NULL;
85
86	✗✓	2	if ((ctx = BN_CTX_new()) == NULL)
87			goto err;
88
89	✓✗	2	if (dsa->priv_key == NULL) {
90	✗✓	2	if ((priv_key = BN_new()) == NULL)
91			goto err;
92			} else
93			priv_key=dsa->priv_key;
94
95			do {
96	✗✓	2	if (!BN_rand_range(priv_key, dsa->q))
97			goto err;
98	✗✓	2	} while (BN_is_zero(priv_key));
99
100	✓✗	2	if (dsa->pub_key == NULL) {
101	✗✓	2	if ((pub_key = BN_new()) == NULL)
102			goto err;
103			} else
104			pub_key=dsa->pub_key;
105
106			{
107			BIGNUM prk;
108
109		2	BN_with_flags(&prk, priv_key, BN_FLG_CONSTTIME);
110
111	✗✓	2	if (!BN_mod_exp(pub_key, dsa->g, &prk, dsa->p, ctx))
112			goto err;
113			}
114
115		2	dsa->priv_key = priv_key;
116		2	dsa->pub_key = pub_key;
117		2	ok = 1;
118
119		2	err:
120	✓✗✗✓	2	if (pub_key != NULL && dsa->pub_key == NULL)
121			BN_free(pub_key);
122	✓✗✗✓	2	if (priv_key != NULL && dsa->priv_key == NULL)
123			BN_free(priv_key);
124		2	BN_CTX_free(ctx);
125		2	return ok;
126			}
127			#endif