1 /* crypto/ecdsa/ecs_lib.c */
2 /* ====================================================================
3 * Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
31 * 6. Redistributions of any form whatsoever must retain the following
33 * "This product includes software developed by the OpenSSL Project
34 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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).
58 #ifndef OPENSSL_NO_ENGINE
59 # include <openssl/engine.h>
61 #include <openssl/err.h>
62 #include <openssl/bn.h>
64 static const ECDSA_METHOD *default_ECDSA_method = NULL;
66 static void *ecdsa_data_new(void);
67 static void *ecdsa_data_dup(void *);
68 static void ecdsa_data_free(void *);
70 void ECDSA_set_default_method(const ECDSA_METHOD *meth)
72 default_ECDSA_method = meth;
75 const ECDSA_METHOD *ECDSA_get_default_method(void)
77 return default_ECDSA_method;
80 int ECDSA_set_method(EC_KEY *eckey, const ECDSA_METHOD *meth)
84 ecdsa = ecdsa_check(eckey);
89 #ifndef OPENSSL_NO_ENGINE
91 ENGINE_finish(ecdsa->engine);
100 static ECDSA_DATA *ECDSA_DATA_new_method(ENGINE *engine)
104 ret = OPENSSL_malloc(sizeof(*ret));
106 ECDSAerr(ECDSA_F_ECDSA_DATA_NEW_METHOD, ERR_R_MALLOC_FAILURE);
112 ret->meth = ECDSA_get_default_method();
113 ret->engine = engine;
114 #ifndef OPENSSL_NO_ENGINE
116 ret->engine = ENGINE_get_default_ECDSA();
118 ret->meth = ENGINE_get_ECDSA(ret->engine);
120 ECDSAerr(ECDSA_F_ECDSA_DATA_NEW_METHOD, ERR_R_ENGINE_LIB);
121 ENGINE_finish(ret->engine);
128 ret->flags = ret->meth->flags;
129 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ECDSA, ret, &ret->ex_data);
133 static void *ecdsa_data_new(void)
135 return (void *)ECDSA_DATA_new_method(NULL);
138 static void *ecdsa_data_dup(void *data)
140 ECDSA_DATA *r = (ECDSA_DATA *)data;
142 /* XXX: dummy operation */
146 return ecdsa_data_new();
149 static void ecdsa_data_free(void *data)
151 ECDSA_DATA *r = (ECDSA_DATA *)data;
153 #ifndef OPENSSL_NO_ENGINE
155 ENGINE_finish(r->engine);
157 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDSA, r, &r->ex_data);
159 OPENSSL_clear_free((void *)r, sizeof(ECDSA_DATA));
162 ECDSA_DATA *ecdsa_check(EC_KEY *key)
164 ECDSA_DATA *ecdsa_data;
166 void *data = EC_KEY_get_key_method_data(key, ecdsa_data_dup,
167 ecdsa_data_free, ecdsa_data_free);
169 ecdsa_data = (ECDSA_DATA *)ecdsa_data_new();
170 if (ecdsa_data == NULL)
172 data = EC_KEY_insert_key_method_data(key, (void *)ecdsa_data,
173 ecdsa_data_dup, ecdsa_data_free,
177 * Another thread raced us to install the key_method data and
180 ecdsa_data_free(ecdsa_data);
181 ecdsa_data = (ECDSA_DATA *)data;
184 ecdsa_data = (ECDSA_DATA *)data;
189 int ECDSA_size(const EC_KEY *r)
193 BIGNUM *order = NULL;
194 unsigned char buf[4];
195 const EC_GROUP *group;
199 group = EC_KEY_get0_group(r);
203 if ((order = BN_new()) == NULL)
205 if (!EC_GROUP_get_order(group, order, NULL)) {
206 BN_clear_free(order);
209 i = BN_num_bits(order);
210 bs.length = (i + 7) / 8;
212 bs.type = V_ASN1_INTEGER;
213 /* If the top bit is set the asn1 encoding is 1 larger. */
216 i = i2d_ASN1_INTEGER(&bs, NULL);
217 i += i; /* r and s */
218 ret = ASN1_object_size(1, i, V_ASN1_SEQUENCE);
219 BN_clear_free(order);
223 int ECDSA_set_ex_data(EC_KEY *d, int idx, void *arg)
226 ecdsa = ecdsa_check(d);
229 return (CRYPTO_set_ex_data(&ecdsa->ex_data, idx, arg));
232 void *ECDSA_get_ex_data(EC_KEY *d, int idx)
235 ecdsa = ecdsa_check(d);
238 return (CRYPTO_get_ex_data(&ecdsa->ex_data, idx));
241 ECDSA_METHOD *ECDSA_METHOD_new(const ECDSA_METHOD *ecdsa_meth)
245 ret = OPENSSL_zalloc(sizeof(*ret));
247 ECDSAerr(ECDSA_F_ECDSA_METHOD_NEW, ERR_R_MALLOC_FAILURE);
253 ret->flags |= ECDSA_METHOD_FLAG_ALLOCATED;
257 void ECDSA_METHOD_set_sign(ECDSA_METHOD *ecdsa_method,
258 ECDSA_SIG *(*ecdsa_do_sign) (const unsigned char
264 ecdsa_method->ecdsa_do_sign = ecdsa_do_sign;
267 void ECDSA_METHOD_set_sign_setup(ECDSA_METHOD *ecdsa_method,
268 int (*ecdsa_sign_setup) (EC_KEY *eckey,
273 ecdsa_method->ecdsa_sign_setup = ecdsa_sign_setup;
276 void ECDSA_METHOD_set_verify(ECDSA_METHOD *ecdsa_method,
277 int (*ecdsa_do_verify) (const unsigned char
279 const ECDSA_SIG *sig,
282 ecdsa_method->ecdsa_do_verify = ecdsa_do_verify;
285 void ECDSA_METHOD_set_flags(ECDSA_METHOD *ecdsa_method, int flags)
287 ecdsa_method->flags = flags | ECDSA_METHOD_FLAG_ALLOCATED;
290 void ECDSA_METHOD_set_name(ECDSA_METHOD *ecdsa_method, char *name)
292 ecdsa_method->name = name;
295 void ECDSA_METHOD_free(ECDSA_METHOD *ecdsa_method)
299 if (ecdsa_method->flags & ECDSA_METHOD_FLAG_ALLOCATED)
300 OPENSSL_free(ecdsa_method);
303 void ECDSA_METHOD_set_app_data(ECDSA_METHOD *ecdsa_method, void *app)
305 ecdsa_method->app_data = app;
308 void *ECDSA_METHOD_get_app_data(ECDSA_METHOD *ecdsa_method)
310 return ecdsa_method->app_data;