Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/ec/ec_key.c	Lines:	100	209	47.8 %
Date:	2017-11-13	Branches:	39	148	26.4 %


/* $OpenBSD: ec_key.c,v 1.14 2017/05/02 03:59:44 deraadt Exp $ */
/*
 * Written by Nils Larsch for the OpenSSL project.
 */
/* ====================================================================
 * 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).
 *
 */
/* ====================================================================
 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 * Portions originally developed by SUN MICROSYSTEMS, INC., and
 * contributed to the OpenSSL project.
 */

#include <string.h>

#include <openssl/opensslconf.h>

#include "ec_lcl.h"
#include <openssl/err.h>

EC_KEY *
EC_KEY_new(void)
{
	EC_KEY *ret;

	ret = malloc(sizeof(EC_KEY));
	if (ret == NULL) {
		ECerror(ERR_R_MALLOC_FAILURE);
		return (NULL);
	}
	ret->version = 1;
	ret->flags = 0;
	ret->group = NULL;
	ret->pub_key = NULL;
	ret->priv_key = NULL;
	ret->enc_flag = 0;
	ret->conv_form = POINT_CONVERSION_UNCOMPRESSED;
	ret->references = 1;
	ret->method_data = NULL;
	return (ret);
}

EC_KEY *
EC_KEY_new_by_curve_name(int nid)
{
	EC_KEY *ret = EC_KEY_new();
	if (ret == NULL)
		return NULL;
	ret->group = EC_GROUP_new_by_curve_name(nid);
	if (ret->group == NULL) {
		EC_KEY_free(ret);
		return NULL;
	}
	return ret;
}

void
EC_KEY_free(EC_KEY * r)
{
	int i;

	if (r == NULL)
		return;

	i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_EC);
	if (i > 0)
		return;

	EC_GROUP_free(r->group);
	EC_POINT_free(r->pub_key);
	BN_clear_free(r->priv_key);

	EC_EX_DATA_free_all_data(&r->method_data);

	freezero(r, sizeof(EC_KEY));
}

EC_KEY *
EC_KEY_copy(EC_KEY * dest, const EC_KEY * src)
{
	EC_EXTRA_DATA *d;

	if (dest == NULL || src == NULL) {
		ECerror(ERR_R_PASSED_NULL_PARAMETER);
		return NULL;
	}
	/* copy the parameters */
	if (src->group) {
		const EC_METHOD *meth = EC_GROUP_method_of(src->group);
		/* clear the old group */
		EC_GROUP_free(dest->group);
		dest->group = EC_GROUP_new(meth);
		if (dest->group == NULL)
			return NULL;
		if (!EC_GROUP_copy(dest->group, src->group))
			return NULL;
	}
	/* copy the public key */
	if (src->pub_key && src->group) {
		EC_POINT_free(dest->pub_key);
		dest->pub_key = EC_POINT_new(src->group);
		if (dest->pub_key == NULL)
			return NULL;
		if (!EC_POINT_copy(dest->pub_key, src->pub_key))
			return NULL;
	}
	/* copy the private key */
	if (src->priv_key) {
		if (dest->priv_key == NULL) {
			dest->priv_key = BN_new();
			if (dest->priv_key == NULL)
				return NULL;
		}
		if (!BN_copy(dest->priv_key, src->priv_key))
			return NULL;
	}
	/* copy method/extra data */
	EC_EX_DATA_free_all_data(&dest->method_data);

	for (d = src->method_data; d != NULL; d = d->next) {
		void *t = d->dup_func(d->data);

		if (t == NULL)
			return 0;
		if (!EC_EX_DATA_set_data(&dest->method_data, t, d->dup_func,
		    d->free_func, d->clear_free_func))
			return 0;
	}

	/* copy the rest */
	dest->enc_flag = src->enc_flag;
	dest->conv_form = src->conv_form;
	dest->version = src->version;
	dest->flags = src->flags;

	return dest;
}

EC_KEY *
EC_KEY_dup(const EC_KEY * ec_key)
{
	EC_KEY *ret = EC_KEY_new();
	if (ret == NULL)
		return NULL;
	if (EC_KEY_copy(ret, ec_key) == NULL) {
		EC_KEY_free(ret);
		return NULL;
	}
	return ret;
}

int
EC_KEY_up_ref(EC_KEY * r)
{
	int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_EC);
	return ((i > 1) ? 1 : 0);
}

int
EC_KEY_generate_key(EC_KEY * eckey)
{
	int ok = 0;
	BN_CTX *ctx = NULL;
	BIGNUM *priv_key = NULL, *order = NULL;
	EC_POINT *pub_key = NULL;

	if (!eckey || !eckey->group) {
		ECerror(ERR_R_PASSED_NULL_PARAMETER);
		return 0;
	}
	if ((order = BN_new()) == NULL)
		goto err;
	if ((ctx = BN_CTX_new()) == NULL)
		goto err;

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

	if (!EC_GROUP_get_order(eckey->group, order, ctx))
		goto err;

	do
		if (!BN_rand_range(priv_key, order))
			goto err;
	while (BN_is_zero(priv_key));

	if (eckey->pub_key == NULL) {
		pub_key = EC_POINT_new(eckey->group);
		if (pub_key == NULL)
			goto err;
	} else
		pub_key = eckey->pub_key;

	if (!EC_POINT_mul(eckey->group, pub_key, priv_key, NULL, NULL, ctx))
		goto err;

	eckey->priv_key = priv_key;
	eckey->pub_key = pub_key;

	ok = 1;

err:
	BN_free(order);
	if (pub_key != NULL && eckey->pub_key == NULL)
		EC_POINT_free(pub_key);
	if (priv_key != NULL && eckey->priv_key == NULL)
		BN_free(priv_key);
	BN_CTX_free(ctx);
	return (ok);
}

int
EC_KEY_check_key(const EC_KEY * eckey)
{
	int ok = 0;
	BN_CTX *ctx = NULL;
	const BIGNUM *order = NULL;
	EC_POINT *point = NULL;

	if (!eckey || !eckey->group || !eckey->pub_key) {
		ECerror(ERR_R_PASSED_NULL_PARAMETER);
		return 0;
	}
	if (EC_POINT_is_at_infinity(eckey->group, eckey->pub_key) > 0) {
		ECerror(EC_R_POINT_AT_INFINITY);
		goto err;
	}
	if ((ctx = BN_CTX_new()) == NULL)
		goto err;
	if ((point = EC_POINT_new(eckey->group)) == NULL)
		goto err;

	/* testing whether the pub_key is on the elliptic curve */
	if (EC_POINT_is_on_curve(eckey->group, eckey->pub_key, ctx) <= 0) {
		ECerror(EC_R_POINT_IS_NOT_ON_CURVE);
		goto err;
	}
	/* testing whether pub_key * order is the point at infinity */
	order = &eckey->group->order;
	if (BN_is_zero(order)) {
		ECerror(EC_R_INVALID_GROUP_ORDER);
		goto err;
	}
	if (!EC_POINT_mul(eckey->group, point, NULL, eckey->pub_key, order, ctx)) {
		ECerror(ERR_R_EC_LIB);
		goto err;
	}
	if (EC_POINT_is_at_infinity(eckey->group, point) <= 0) {
		ECerror(EC_R_WRONG_ORDER);
		goto err;
	}
	/*
	 * in case the priv_key is present : check if generator * priv_key ==
	 * pub_key
	 */
	if (eckey->priv_key) {
		if (BN_cmp(eckey->priv_key, order) >= 0) {
			ECerror(EC_R_WRONG_ORDER);
			goto err;
		}
		if (!EC_POINT_mul(eckey->group, point, eckey->priv_key,
			NULL, NULL, ctx)) {
			ECerror(ERR_R_EC_LIB);
			goto err;
		}
		if (EC_POINT_cmp(eckey->group, point, eckey->pub_key,
			ctx) != 0) {
			ECerror(EC_R_INVALID_PRIVATE_KEY);
			goto err;
		}
	}
	ok = 1;
err:
	BN_CTX_free(ctx);
	EC_POINT_free(point);
	return (ok);
}

int
EC_KEY_set_public_key_affine_coordinates(EC_KEY * key, BIGNUM * x, BIGNUM * y)
{
	BN_CTX *ctx = NULL;
	BIGNUM *tx, *ty;
	EC_POINT *point = NULL;
	int ok = 0, tmp_nid, is_char_two = 0;

	if (!key || !key->group || !x || !y) {
		ECerror(ERR_R_PASSED_NULL_PARAMETER);
		return 0;
	}
	ctx = BN_CTX_new();
	if (!ctx)
		goto err;

	point = EC_POINT_new(key->group);

	if (!point)
		goto err;

	tmp_nid = EC_METHOD_get_field_type(EC_GROUP_method_of(key->group));

	if (tmp_nid == NID_X9_62_characteristic_two_field)
		is_char_two = 1;

	if ((tx = BN_CTX_get(ctx)) == NULL)
		goto err;
	if ((ty = BN_CTX_get(ctx)) == NULL)
		goto err;

#ifndef OPENSSL_NO_EC2M
	if (is_char_two) {
		if (!EC_POINT_set_affine_coordinates_GF2m(key->group, point,
			x, y, ctx))
			goto err;
		if (!EC_POINT_get_affine_coordinates_GF2m(key->group, point,
			tx, ty, ctx))
			goto err;
	} else
#endif
	{
		if (!EC_POINT_set_affine_coordinates_GFp(key->group, point,
			x, y, ctx))
			goto err;
		if (!EC_POINT_get_affine_coordinates_GFp(key->group, point,
			tx, ty, ctx))
			goto err;
	}
	/*
	 * Check if retrieved coordinates match originals: if not values are
	 * out of range.
	 */
	if (BN_cmp(x, tx) || BN_cmp(y, ty)) {
		ECerror(EC_R_COORDINATES_OUT_OF_RANGE);
		goto err;
	}
	if (!EC_KEY_set_public_key(key, point))
		goto err;

	if (EC_KEY_check_key(key) == 0)
		goto err;

	ok = 1;

err:
	BN_CTX_free(ctx);
	EC_POINT_free(point);
	return ok;

}

const EC_GROUP *
EC_KEY_get0_group(const EC_KEY * key)
{
	return key->group;
}

int
EC_KEY_set_group(EC_KEY * key, const EC_GROUP * group)
{
	EC_GROUP_free(key->group);
	key->group = EC_GROUP_dup(group);
	return (key->group == NULL) ? 0 : 1;
}

const BIGNUM *
EC_KEY_get0_private_key(const EC_KEY * key)
{
	return key->priv_key;
}

int
EC_KEY_set_private_key(EC_KEY * key, const BIGNUM * priv_key)
{
	BN_clear_free(key->priv_key);
	key->priv_key = BN_dup(priv_key);
	return (key->priv_key == NULL) ? 0 : 1;
}

const EC_POINT *
EC_KEY_get0_public_key(const EC_KEY * key)
{
	return key->pub_key;
}

int
EC_KEY_set_public_key(EC_KEY * key, const EC_POINT * pub_key)
{
	EC_POINT_free(key->pub_key);
	key->pub_key = EC_POINT_dup(pub_key, key->group);
	return (key->pub_key == NULL) ? 0 : 1;
}

unsigned int
EC_KEY_get_enc_flags(const EC_KEY * key)
{
	return key->enc_flag;
}

void
EC_KEY_set_enc_flags(EC_KEY * key, unsigned int flags)
{
	key->enc_flag = flags;
}

point_conversion_form_t
EC_KEY_get_conv_form(const EC_KEY * key)
{
	return key->conv_form;
}

void
EC_KEY_set_conv_form(EC_KEY * key, point_conversion_form_t cform)
{
	key->conv_form = cform;
	if (key->group != NULL)
		EC_GROUP_set_point_conversion_form(key->group, cform);
}

void *
EC_KEY_get_key_method_data(EC_KEY *key,
    void *(*dup_func) (void *),
    void (*free_func) (void *),
    void (*clear_free_func) (void *))
{
	void *ret;

	CRYPTO_r_lock(CRYPTO_LOCK_EC);
	ret = EC_EX_DATA_get_data(key->method_data, dup_func, free_func, clear_free_func);
	CRYPTO_r_unlock(CRYPTO_LOCK_EC);

	return ret;
}

void *
EC_KEY_insert_key_method_data(EC_KEY * key, void *data,
    void *(*dup_func) (void *),
    void (*free_func) (void *),
    void (*clear_free_func) (void *))
{
	EC_EXTRA_DATA *ex_data;

	CRYPTO_w_lock(CRYPTO_LOCK_EC);
	ex_data = EC_EX_DATA_get_data(key->method_data, dup_func, free_func, clear_free_func);
	if (ex_data == NULL)
		EC_EX_DATA_set_data(&key->method_data, data, dup_func, free_func, clear_free_func);
	CRYPTO_w_unlock(CRYPTO_LOCK_EC);

	return ex_data;
}

void
EC_KEY_set_asn1_flag(EC_KEY * key, int flag)
{
	if (key->group != NULL)
		EC_GROUP_set_asn1_flag(key->group, flag);
}

int
EC_KEY_precompute_mult(EC_KEY * key, BN_CTX * ctx)
{
	if (key->group == NULL)
		return 0;
	return EC_GROUP_precompute_mult(key->group, ctx);
}

int
EC_KEY_get_flags(const EC_KEY * key)
{
	return key->flags;
}

void
EC_KEY_set_flags(EC_KEY * key, int flags)
{
	key->flags |= flags;
}

void
EC_KEY_clear_flags(EC_KEY * key, int flags)
{
	key->flags &= ~flags;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: ec_key.c,v 1.14 2017/05/02 03:59:44 deraadt Exp $ */
2			/*
3			* Written by Nils Larsch for the OpenSSL project.
4			*/
5			/* ====================================================================
6			* Copyright (c) 1998-2005 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 originally developed by SUN MICROSYSTEMS, INC., and
61			* contributed to the OpenSSL project.
62			*/
63
64			#include <string.h>
65
66			#include <openssl/opensslconf.h>
67
68			#include "ec_lcl.h"
69			#include <openssl/err.h>
70
71			EC_KEY *
72			EC_KEY_new(void)
73			{
74			EC_KEY *ret;
75
76		7786	ret = malloc(sizeof(EC_KEY));
77	✗✓	3893	if (ret == NULL) {
78			ECerror(ERR_R_MALLOC_FAILURE);
79			return (NULL);
80			}
81		3893	ret->version = 1;
82		3893	ret->flags = 0;
83		3893	ret->group = NULL;
84		3893	ret->pub_key = NULL;
85		3893	ret->priv_key = NULL;
86		3893	ret->enc_flag = 0;
87		3893	ret->conv_form = POINT_CONVERSION_UNCOMPRESSED;
88		3893	ret->references = 1;
89		3893	ret->method_data = NULL;
90		3893	return (ret);
91		3893	}
92
93			EC_KEY *
94			EC_KEY_new_by_curve_name(int nid)
95			{
96		1034	EC_KEY *ret = EC_KEY_new();
97	✗✓	517	if (ret == NULL)
98			return NULL;
99		517	ret->group = EC_GROUP_new_by_curve_name(nid);
100	✗✓	517	if (ret->group == NULL) {
101			EC_KEY_free(ret);
102			return NULL;
103			}
104		517	return ret;
105		517	}
106
107			void
108			EC_KEY_free(EC_KEY * r)
109			{
110			int i;
111
112	✓✓	64386	if (r == NULL)
113		27932	return;
114
115		4261	i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_EC);
116	✓✓	4261	if (i > 0)
117		368	return;
118
119		3893	EC_GROUP_free(r->group);
120		3893	EC_POINT_free(r->pub_key);
121		3893	BN_clear_free(r->priv_key);
122
123		3893	EC_EX_DATA_free_all_data(&r->method_data);
124
125		3893	freezero(r, sizeof(EC_KEY));
126		36086	}
127
128			EC_KEY *
129			EC_KEY_copy(EC_KEY * dest, const EC_KEY * src)
130			{
131			EC_EXTRA_DATA *d;
132
133			if (dest == NULL \|\| src == NULL) {
134			ECerror(ERR_R_PASSED_NULL_PARAMETER);
135			return NULL;
136			}
137			/* copy the parameters */
138			if (src->group) {
139			const EC_METHOD *meth = EC_GROUP_method_of(src->group);
140			/* clear the old group */
141			EC_GROUP_free(dest->group);
142			dest->group = EC_GROUP_new(meth);
143			if (dest->group == NULL)
144			return NULL;
145			if (!EC_GROUP_copy(dest->group, src->group))
146			return NULL;
147			}
148			/* copy the public key */
149			if (src->pub_key && src->group) {
150			EC_POINT_free(dest->pub_key);
151			dest->pub_key = EC_POINT_new(src->group);
152			if (dest->pub_key == NULL)
153			return NULL;
154			if (!EC_POINT_copy(dest->pub_key, src->pub_key))
155			return NULL;
156			}
157			/* copy the private key */
158			if (src->priv_key) {
159			if (dest->priv_key == NULL) {
160			dest->priv_key = BN_new();
161			if (dest->priv_key == NULL)
162			return NULL;
163			}
164			if (!BN_copy(dest->priv_key, src->priv_key))
165			return NULL;
166			}
167			/* copy method/extra data */
168			EC_EX_DATA_free_all_data(&dest->method_data);
169
170			for (d = src->method_data; d != NULL; d = d->next) {
171			void *t = d->dup_func(d->data);
172
173			if (t == NULL)
174			return 0;
175			if (!EC_EX_DATA_set_data(&dest->method_data, t, d->dup_func,
176			d->free_func, d->clear_free_func))
177			return 0;
178			}
179
180			/* copy the rest */
181			dest->enc_flag = src->enc_flag;
182			dest->conv_form = src->conv_form;
183			dest->version = src->version;
184			dest->flags = src->flags;
185
186			return dest;
187			}
188
189			EC_KEY *
190			EC_KEY_dup(const EC_KEY * ec_key)
191			{
192			EC_KEY *ret = EC_KEY_new();
193			if (ret == NULL)
194			return NULL;
195			if (EC_KEY_copy(ret, ec_key) == NULL) {
196			EC_KEY_free(ret);
197			return NULL;
198			}
199			return ret;
200			}
201
202			int
203			EC_KEY_up_ref(EC_KEY * r)
204			{
205		736	int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_EC);
206		368	return ((i > 1) ? 1 : 0);
207			}
208
209			int
210			EC_KEY_generate_key(EC_KEY * eckey)
211			{
212			int ok = 0;
213			BN_CTX *ctx = NULL;
214			BIGNUM priv_key = NULL, order = NULL;
215			EC_POINT *pub_key = NULL;
216
217	✓✗✗✓	6186	if (!eckey \|\| !eckey->group) {
218			ECerror(ERR_R_PASSED_NULL_PARAMETER);
219			return 0;
220			}
221	✓✗	2062	if ((order = BN_new()) == NULL)
222			goto err;
223	✓✗	2062	if ((ctx = BN_CTX_new()) == NULL)
224			goto err;
225
226	✓✗	2062	if (eckey->priv_key == NULL) {
227		2062	priv_key = BN_new();
228	✓✗	2062	if (priv_key == NULL)
229			goto err;
230			} else
231			priv_key = eckey->priv_key;
232
233	✓✗	2062	if (!EC_GROUP_get_order(eckey->group, order, ctx))
234			goto err;
235
236		2062	do
237	✓✗✗✓	4124	if (!BN_rand_range(priv_key, order))
238			goto err;
239		2062	while (BN_is_zero(priv_key));
240
241	✓✗	2062	if (eckey->pub_key == NULL) {
242		2062	pub_key = EC_POINT_new(eckey->group);
243	✓✗	2062	if (pub_key == NULL)
244			goto err;
245			} else
246			pub_key = eckey->pub_key;
247
248	✓✗	2062	if (!EC_POINT_mul(eckey->group, pub_key, priv_key, NULL, NULL, ctx))
249			goto err;
250
251		2062	eckey->priv_key = priv_key;
252		2062	eckey->pub_key = pub_key;
253
254		2062	ok = 1;
255
256			err:
257		2062	BN_free(order);
258	✓✗✗✓	4124	if (pub_key != NULL && eckey->pub_key == NULL)
259			EC_POINT_free(pub_key);
260	✓✗✗✓	4124	if (priv_key != NULL && eckey->priv_key == NULL)
261			BN_free(priv_key);
262		2062	BN_CTX_free(ctx);
263		2062	return (ok);
264		2062	}
265
266			int
267			EC_KEY_check_key(const EC_KEY * eckey)
268			{
269			int ok = 0;
270			BN_CTX *ctx = NULL;
271			const BIGNUM *order = NULL;
272			EC_POINT *point = NULL;
273
274	✓✗✓✗ ✗✓	1616	if (!eckey \|\| !eckey->group \|\| !eckey->pub_key) {
275			ECerror(ERR_R_PASSED_NULL_PARAMETER);
276			return 0;
277			}
278	✗✓	404	if (EC_POINT_is_at_infinity(eckey->group, eckey->pub_key) > 0) {
279			ECerror(EC_R_POINT_AT_INFINITY);
280			goto err;
281			}
282	✓✗	404	if ((ctx = BN_CTX_new()) == NULL)
283			goto err;
284	✓✗	404	if ((point = EC_POINT_new(eckey->group)) == NULL)
285			goto err;
286
287			/* testing whether the pub_key is on the elliptic curve */
288	✗✓	404	if (EC_POINT_is_on_curve(eckey->group, eckey->pub_key, ctx) <= 0) {
289			ECerror(EC_R_POINT_IS_NOT_ON_CURVE);
290			goto err;
291			}
292			/* testing whether pub_key * order is the point at infinity */
293		404	order = &eckey->group->order;
294	✗✓	404	if (BN_is_zero(order)) {
295			ECerror(EC_R_INVALID_GROUP_ORDER);
296			goto err;
297			}
298	✗✓	404	if (!EC_POINT_mul(eckey->group, point, NULL, eckey->pub_key, order, ctx)) {
299			ECerror(ERR_R_EC_LIB);
300			goto err;
301			}
302	✗✓	404	if (EC_POINT_is_at_infinity(eckey->group, point) <= 0) {
303			ECerror(EC_R_WRONG_ORDER);
304			goto err;
305			}
306			/*
307			* in case the priv_key is present : check if generator * priv_key ==
308			* pub_key
309			*/
310	✓✓	404	if (eckey->priv_key) {
311	✗✓	316	if (BN_cmp(eckey->priv_key, order) >= 0) {
312			ECerror(EC_R_WRONG_ORDER);
313			goto err;
314			}
315	✗✓	316	if (!EC_POINT_mul(eckey->group, point, eckey->priv_key,
316			NULL, NULL, ctx)) {
317			ECerror(ERR_R_EC_LIB);
318			goto err;
319			}
320	✗✓	632	if (EC_POINT_cmp(eckey->group, point, eckey->pub_key,
321		316	ctx) != 0) {
322			ECerror(EC_R_INVALID_PRIVATE_KEY);
323			goto err;
324			}
325			}
326		404	ok = 1;
327			err:
328		404	BN_CTX_free(ctx);
329		404	EC_POINT_free(point);
330		404	return (ok);
331		404	}
332
333			int
334			EC_KEY_set_public_key_affine_coordinates(EC_KEY * key, BIGNUM * x, BIGNUM * y)
335			{
336			BN_CTX *ctx = NULL;
337			BIGNUM tx, ty;
338			EC_POINT *point = NULL;
339			int ok = 0, tmp_nid, is_char_two = 0;
340
341			if (!key \|\| !key->group \|\| !x \|\| !y) {
342			ECerror(ERR_R_PASSED_NULL_PARAMETER);
343			return 0;
344			}
345			ctx = BN_CTX_new();
346			if (!ctx)
347			goto err;
348
349			point = EC_POINT_new(key->group);
350
351			if (!point)
352			goto err;
353
354			tmp_nid = EC_METHOD_get_field_type(EC_GROUP_method_of(key->group));
355
356			if (tmp_nid == NID_X9_62_characteristic_two_field)
357			is_char_two = 1;
358
359			if ((tx = BN_CTX_get(ctx)) == NULL)
360			goto err;
361			if ((ty = BN_CTX_get(ctx)) == NULL)
362			goto err;
363
364			#ifndef OPENSSL_NO_EC2M
365			if (is_char_two) {
366			if (!EC_POINT_set_affine_coordinates_GF2m(key->group, point,
367			x, y, ctx))
368			goto err;
369			if (!EC_POINT_get_affine_coordinates_GF2m(key->group, point,
370			tx, ty, ctx))
371			goto err;
372			} else
373			#endif
374			{
375			if (!EC_POINT_set_affine_coordinates_GFp(key->group, point,
376			x, y, ctx))
377			goto err;
378			if (!EC_POINT_get_affine_coordinates_GFp(key->group, point,
379			tx, ty, ctx))
380			goto err;
381			}
382			/*
383			* Check if retrieved coordinates match originals: if not values are
384			* out of range.
385			*/
386			if (BN_cmp(x, tx) \|\| BN_cmp(y, ty)) {
387			ECerror(EC_R_COORDINATES_OUT_OF_RANGE);
388			goto err;
389			}
390			if (!EC_KEY_set_public_key(key, point))
391			goto err;
392
393			if (EC_KEY_check_key(key) == 0)
394			goto err;
395
396			ok = 1;
397
398			err:
399			BN_CTX_free(ctx);
400			EC_POINT_free(point);
401			return ok;
402
403			}
404
405			const EC_GROUP *
406			EC_KEY_get0_group(const EC_KEY * key)
407			{
408		19186	return key->group;
409			}
410
411			int
412			EC_KEY_set_group(EC_KEY * key, const EC_GROUP * group)
413			{
414		6380	EC_GROUP_free(key->group);
415		3190	key->group = EC_GROUP_dup(group);
416		3190	return (key->group == NULL) ? 0 : 1;
417			}
418
419			const BIGNUM *
420			EC_KEY_get0_private_key(const EC_KEY * key)
421			{
422		3980	return key->priv_key;
423			}
424
425			int
426			EC_KEY_set_private_key(EC_KEY * key, const BIGNUM * priv_key)
427			{
428		174	BN_clear_free(key->priv_key);
429		87	key->priv_key = BN_dup(priv_key);
430		87	return (key->priv_key == NULL) ? 0 : 1;
431			}
432
433			const EC_POINT *
434			EC_KEY_get0_public_key(const EC_KEY * key)
435			{
436		10420	return key->pub_key;
437			}
438
439			int
440			EC_KEY_set_public_key(EC_KEY * key, const EC_POINT * pub_key)
441			{
442		2566	EC_POINT_free(key->pub_key);
443		1283	key->pub_key = EC_POINT_dup(pub_key, key->group);
444		1283	return (key->pub_key == NULL) ? 0 : 1;
445			}
446
447			unsigned int
448			EC_KEY_get_enc_flags(const EC_KEY * key)
449			{
450		8	return key->enc_flag;
451			}
452
453			void
454			EC_KEY_set_enc_flags(EC_KEY * key, unsigned int flags)
455			{
456		16	key->enc_flag = flags;
457		8	}
458
459			point_conversion_form_t
460			EC_KEY_get_conv_form(const EC_KEY * key)
461			{
462		364	return key->conv_form;
463			}
464
465			void
466			EC_KEY_set_conv_form(EC_KEY * key, point_conversion_form_t cform)
467			{
468			key->conv_form = cform;
469			if (key->group != NULL)
470			EC_GROUP_set_point_conversion_form(key->group, cform);
471			}
472
473			void *
474			EC_KEY_get_key_method_data(EC_KEY *key,
475			void (dup_func) (void *),
476			void (free_func) (void ),
477			void (clear_free_func) (void ))
478			{
479			void *ret;
480
481		6356	CRYPTO_r_lock(CRYPTO_LOCK_EC);
482		3178	ret = EC_EX_DATA_get_data(key->method_data, dup_func, free_func, clear_free_func);
483		3178	CRYPTO_r_unlock(CRYPTO_LOCK_EC);
484
485		3178	return ret;
486			}
487
488			void *
489			EC_KEY_insert_key_method_data(EC_KEY * key, void *data,
490			void (dup_func) (void *),
491			void (free_func) (void ),
492			void (clear_free_func) (void ))
493			{
494			EC_EXTRA_DATA *ex_data;
495
496		3620	CRYPTO_w_lock(CRYPTO_LOCK_EC);
497		1810	ex_data = EC_EX_DATA_get_data(key->method_data, dup_func, free_func, clear_free_func);
498	✓✗	1810	if (ex_data == NULL)
499		1810	EC_EX_DATA_set_data(&key->method_data, data, dup_func, free_func, clear_free_func);
500		1810	CRYPTO_w_unlock(CRYPTO_LOCK_EC);
501
502		1810	return ex_data;
503			}
504
505			void
506			EC_KEY_set_asn1_flag(EC_KEY * key, int flag)
507			{
508			if (key->group != NULL)
509			EC_GROUP_set_asn1_flag(key->group, flag);
510			}
511
512			int
513			EC_KEY_precompute_mult(EC_KEY * key, BN_CTX * ctx)
514			{
515			if (key->group == NULL)
516			return 0;
517			return EC_GROUP_precompute_mult(key->group, ctx);
518			}
519
520			int
521			EC_KEY_get_flags(const EC_KEY * key)
522			{
523			return key->flags;
524			}
525
526			void
527			EC_KEY_set_flags(EC_KEY * key, int flags)
528			{
529			key->flags \|= flags;
530			}
531
532			void
533			EC_KEY_clear_flags(EC_KEY * key, int flags)
534			{
535			key->flags &= ~flags;
536			}