/src/libressl/crypto/ecdh/ech_lib.c

Source (jump to first uncovered line)
/* $OpenBSD: ech_lib.c,v 1.14 2018/04/14 07:09:21 tb Exp $ */
/* ====================================================================
 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 *
 * The Elliptic Curve Public-Key Crypto Library (ECC Code) included
 * herein is developed by SUN MICROSYSTEMS, INC., and is contributed
 * to the OpenSSL project.
 *
 * The ECC Code is licensed pursuant to the OpenSSL open source
 * license provided below.
 *
 * The ECDH software is originally written by Douglas Stebila of
 * Sun Microsystems Laboratories.
 *
 */
/* ====================================================================
 * Copyright (c) 1998-2003 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 "ech_locl.h"
#ifndef OPENSSL_NO_ENGINE
#include <openssl/engine.h>
#endif
#include <openssl/err.h>

static const ECDH_METHOD *default_ECDH_method = NULL;

static void *ecdh_data_new(void);
static void *ecdh_data_dup(void *);
static void  ecdh_data_free(void *);

void
ECDH_set_default_method(const ECDH_METHOD *meth)
{
  default_ECDH_method = meth;
}

const ECDH_METHOD *
ECDH_get_default_method(void)
{
  if (!default_ECDH_method) {
    default_ECDH_method = ECDH_OpenSSL();
  }
  return default_ECDH_method;
}

int
ECDH_set_method(EC_KEY *eckey, const ECDH_METHOD *meth)
{
  ECDH_DATA *ecdh;

  ecdh = ecdh_check(eckey);

  if (ecdh == NULL)
    return 0;

#ifndef OPENSSL_NO_ENGINE
  ENGINE_finish(ecdh->engine);
  ecdh->engine = NULL;
#endif
  ecdh->meth = meth;
  return 1;
}

static ECDH_DATA *
ECDH_DATA_new_method(ENGINE *engine)
{
  ECDH_DATA *ret;

  ret = malloc(sizeof(ECDH_DATA));
  if (ret == NULL) {
    ECDHerror(ERR_R_MALLOC_FAILURE);
    return (NULL);
  }

  ret->init = NULL;

  ret->meth = ECDH_get_default_method();
  ret->engine = engine;
#ifndef OPENSSL_NO_ENGINE
  if (!ret->engine)
    ret->engine = ENGINE_get_default_ECDH();
  if (ret->engine) {
    ret->meth = ENGINE_get_ECDH(ret->engine);
    if (ret->meth == NULL) {
      ECDHerror(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_ECDH, ret, &ret->ex_data);
  return (ret);
}

static void *
ecdh_data_new(void)
{
  return (void *)ECDH_DATA_new_method(NULL);
}

static void *
ecdh_data_dup(void *data)
{
  ECDH_DATA *r = (ECDH_DATA *)data;

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

  return (void *)ecdh_data_new();
}

void
ecdh_data_free(void *data)
{
  ECDH_DATA *r = (ECDH_DATA *)data;

#ifndef OPENSSL_NO_ENGINE
  ENGINE_finish(r->engine);
#endif

  CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDH, r, &r->ex_data);

  freezero(r, sizeof(ECDH_DATA));
}

ECDH_DATA *
ecdh_check(EC_KEY *key)
{
  ECDH_DATA *ecdh_data;

  void *data = EC_KEY_get_key_method_data(key, ecdh_data_dup,
      ecdh_data_free, ecdh_data_free);
  if (data == NULL) {
    ecdh_data = (ECDH_DATA *)ecdh_data_new();
    if (ecdh_data == NULL)
      return NULL;
    data = EC_KEY_insert_key_method_data(key, (void *)ecdh_data,
        ecdh_data_dup, ecdh_data_free, ecdh_data_free);
    if (data != NULL) {
      /* Another thread raced us to install the key_method
       * data and won. */
      ecdh_data_free(ecdh_data);
      ecdh_data = (ECDH_DATA *)data;
    }
  } else
    ecdh_data = (ECDH_DATA *)data;

  return ecdh_data;
}

int
ECDH_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_ECDH, argl, argp,
      new_func, dup_func, free_func);
}

int
ECDH_set_ex_data(EC_KEY *d, int idx, void *arg)
{
  ECDH_DATA *ecdh;
  ecdh = ecdh_check(d);
  if (ecdh == NULL)
    return 0;
  return (CRYPTO_set_ex_data(&ecdh->ex_data, idx, arg));
}

void *
ECDH_get_ex_data(EC_KEY *d, int idx)
{
  ECDH_DATA *ecdh;
  ecdh = ecdh_check(d);
  if (ecdh == NULL)
    return NULL;
  return (CRYPTO_get_ex_data(&ecdh->ex_data, idx));
}

int
ECDH_size(const EC_KEY *d)
{
  return ((EC_GROUP_get_degree(EC_KEY_get0_group(d)) + 7) / 8);
}

Coverage Report

Created: 2022-08-24 06:30

Line	Count	Source (jump to first uncovered line)
1		/* $OpenBSD: ech_lib.c,v 1.14 2018/04/14 07:09:21 tb Exp $ */
2		/* ====================================================================
3		* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
4		*
5		* The Elliptic Curve Public-Key Crypto Library (ECC Code) included
6		* herein is developed by SUN MICROSYSTEMS, INC., and is contributed
7		* to the OpenSSL project.
8		*
9		* The ECC Code is licensed pursuant to the OpenSSL open source
10		* license provided below.
11		*
12		* The ECDH software is originally written by Douglas Stebila of
13		* Sun Microsystems Laboratories.
14		*
15		*/
16		/* ====================================================================
17		* Copyright (c) 1998-2003 The OpenSSL Project. All rights reserved.
18		*
19		* Redistribution and use in source and binary forms, with or without
20		* modification, are permitted provided that the following conditions
21		* are met:
22		*
23		* 1. Redistributions of source code must retain the above copyright
24		* notice, this list of conditions and the following disclaimer.
25		*
26		* 2. Redistributions in binary form must reproduce the above copyright
27		* notice, this list of conditions and the following disclaimer in
28		* the documentation and/or other materials provided with the
29		* distribution.
30		*
31		* 3. All advertising materials mentioning features or use of this
32		* software must display the following acknowledgment:
33		* "This product includes software developed by the OpenSSL Project
34		* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
35		*
36		* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
37		* endorse or promote products derived from this software without
38		* prior written permission. For written permission, please contact
39		* openssl-core@OpenSSL.org.
40		*
41		* 5. Products derived from this software may not be called "OpenSSL"
42		* nor may "OpenSSL" appear in their names without prior written
43		* permission of the OpenSSL Project.
44		*
45		* 6. Redistributions of any form whatsoever must retain the following
46		* acknowledgment:
47		* "This product includes software developed by the OpenSSL Project
48		* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
49		*
50		* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
51		* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
52		* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
53		* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
54		* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
55		* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
56		* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
57		* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
58		* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
59		* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
60		* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
61		* OF THE POSSIBILITY OF SUCH DAMAGE.
62		* ====================================================================
63		*
64		* This product includes cryptographic software written by Eric Young
65		* (eay@cryptsoft.com). This product includes software written by Tim
66		* Hudson (tjh@cryptsoft.com).
67		*
68		*/
69
70		#include <string.h>
71
72		#include <openssl/opensslconf.h>
73
74		#include "ech_locl.h"
75		#ifndef OPENSSL_NO_ENGINE
76		#include <openssl/engine.h>
77		#endif
78		#include <openssl/err.h>
79
80		static const ECDH_METHOD *default_ECDH_method = NULL;
81
82		static void *ecdh_data_new(void);
83		static void ecdh_data_dup(void );
84		static void ecdh_data_free(void *);
85
86		void
87		ECDH_set_default_method(const ECDH_METHOD *meth)
88	0	{
89	0	default_ECDH_method = meth;
90	0	}
91
92		const ECDH_METHOD *
93		ECDH_get_default_method(void)
94	0	{
95	0	if (!default_ECDH_method) {
96	0	default_ECDH_method = ECDH_OpenSSL();
97	0	}
98	0	return default_ECDH_method;
99	0	}
100
101		int
102		ECDH_set_method(EC_KEY eckey, const ECDH_METHOD meth)
103	0	{
104	0	ECDH_DATA *ecdh;
105
106	0	ecdh = ecdh_check(eckey);
107
108	0	if (ecdh == NULL)
109	0	return 0;
110
111	0	#ifndef OPENSSL_NO_ENGINE
112	0	ENGINE_finish(ecdh->engine);
113	0	ecdh->engine = NULL;
114	0	#endif
115	0	ecdh->meth = meth;
116	0	return 1;
117	0	}
118
119		static ECDH_DATA *
120		ECDH_DATA_new_method(ENGINE *engine)
121	0	{
122	0	ECDH_DATA *ret;
123
124	0	ret = malloc(sizeof(ECDH_DATA));
125	0	if (ret == NULL) {
126	0	ECDHerror(ERR_R_MALLOC_FAILURE);
127	0	return (NULL);
128	0	}
129
130	0	ret->init = NULL;
131
132	0	ret->meth = ECDH_get_default_method();
133	0	ret->engine = engine;
134	0	#ifndef OPENSSL_NO_ENGINE
135	0	if (!ret->engine)
136	0	ret->engine = ENGINE_get_default_ECDH();
137	0	if (ret->engine) {
138	0	ret->meth = ENGINE_get_ECDH(ret->engine);
139	0	if (ret->meth == NULL) {
140	0	ECDHerror(ERR_R_ENGINE_LIB);
141	0	ENGINE_finish(ret->engine);
142	0	free(ret);
143	0	return NULL;
144	0	}
145	0	}
146	0	#endif
147
148	0	ret->flags = ret->meth->flags;
149	0	CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ECDH, ret, &ret->ex_data);
150	0	return (ret);
151	0	}
152
153		static void *
154		ecdh_data_new(void)
155	0	{
156	0	return (void *)ECDH_DATA_new_method(NULL);
157	0	}
158
159		static void *
160		ecdh_data_dup(void *data)
161	0	{
162	0	ECDH_DATA r = (ECDH_DATA )data;
163
164		/* XXX: dummy operation */
165	0	if (r == NULL)
166	0	return NULL;
167
168	0	return (void *)ecdh_data_new();
169	0	}
170
171		void
172		ecdh_data_free(void *data)
173	0	{
174	0	ECDH_DATA r = (ECDH_DATA )data;
175
176	0	#ifndef OPENSSL_NO_ENGINE
177	0	ENGINE_finish(r->engine);
178	0	#endif
179
180	0	CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDH, r, &r->ex_data);
181
182	0	freezero(r, sizeof(ECDH_DATA));
183	0	}
184
185		ECDH_DATA *
186		ecdh_check(EC_KEY *key)
187	0	{
188	0	ECDH_DATA *ecdh_data;
189
190	0	void *data = EC_KEY_get_key_method_data(key, ecdh_data_dup,
191	0	ecdh_data_free, ecdh_data_free);
192	0	if (data == NULL) {
193	0	ecdh_data = (ECDH_DATA *)ecdh_data_new();
194	0	if (ecdh_data == NULL)
195	0	return NULL;
196	0	data = EC_KEY_insert_key_method_data(key, (void *)ecdh_data,
197	0	ecdh_data_dup, ecdh_data_free, ecdh_data_free);
198	0	if (data != NULL) {
199		/* Another thread raced us to install the key_method
200		* data and won. */
201	0	ecdh_data_free(ecdh_data);
202	0	ecdh_data = (ECDH_DATA *)data;
203	0	}
204	0	} else
205	0	ecdh_data = (ECDH_DATA *)data;
206
207	0	return ecdh_data;
208	0	}
209
210		int
211		ECDH_get_ex_new_index(long argl, void argp, CRYPTO_EX_new new_func,
212		CRYPTO_EX_dup dup_func, CRYPTO_EX_free free_func)
213	0	{
214	0	return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ECDH, argl, argp,
215	0	new_func, dup_func, free_func);
216	0	}
217
218		int
219		ECDH_set_ex_data(EC_KEY d, int idx, void arg)
220	0	{
221	0	ECDH_DATA *ecdh;
222	0	ecdh = ecdh_check(d);
223	0	if (ecdh == NULL)
224	0	return 0;
225	0	return (CRYPTO_set_ex_data(&ecdh->ex_data, idx, arg));
226	0	}
227
228		void *
229		ECDH_get_ex_data(EC_KEY *d, int idx)
230	0	{
231	0	ECDH_DATA *ecdh;
232	0	ecdh = ecdh_check(d);
233	0	if (ecdh == NULL)
234	0	return NULL;
235	0	return (CRYPTO_get_ex_data(&ecdh->ex_data, idx));
236	0	}
237
238		int
239		ECDH_size(const EC_KEY *d)
240	0	{
241	0	return ((EC_GROUP_get_degree(EC_KEY_get0_group(d)) + 7) / 8);
242	0	}