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 const char *ECDSA_version="ECDSA" OPENSSL_VERSION_PTEXT;
66 static const ECDSA_METHOD *default_ECDSA_method = NULL;
68 static void *ecdsa_data_dup(void *);
69 static void ecdsa_data_free(void *);
71 void ECDSA_set_default_method(const ECDSA_METHOD *meth)
73 default_ECDSA_method = meth;
76 const ECDSA_METHOD *ECDSA_get_default_method(void)
78 if(!default_ECDSA_method)
79 default_ECDSA_method = ECDSA_OpenSSL();
80 return default_ECDSA_method;
83 int ECDSA_set_method(EC_KEY *eckey, const ECDSA_METHOD *meth)
85 const ECDSA_METHOD *mtmp;
88 ecdsa = ecdsa_check(eckey);
94 #ifndef OPENSSL_NO_ENGINE
97 ENGINE_finish(ecdsa->engine);
106 static ECDSA_DATA *ECDSA_DATA_new_method(ENGINE *engine)
110 ret=(ECDSA_DATA *)OPENSSL_malloc(sizeof(ECDSA_DATA));
113 ECDSAerr(ECDSA_F_ECDSA_DATA_NEW_METHOD, ERR_R_MALLOC_FAILURE);
119 ret->meth = ECDSA_get_default_method();
120 ret->engine = engine;
121 #ifndef OPENSSL_NO_ENGINE
123 ret->engine = ENGINE_get_default_ECDSA();
126 ret->meth = ENGINE_get_ECDSA(ret->engine);
129 ECDSAerr(ECDSA_F_ECDSA_DATA_NEW_METHOD, ERR_R_ENGINE_LIB);
130 ENGINE_finish(ret->engine);
137 ret->flags = ret->meth->flags;
138 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ECDSA, ret, &ret->ex_data);
140 if ((ret->meth->init != NULL) && !ret->meth->init(ret))
142 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDSA, ret, &ret->ex_data);
150 void *ecdsa_data_new(void)
152 return (void *)ECDSA_DATA_new_method(NULL);
155 static void *ecdsa_data_dup(void *data)
157 ECDSA_DATA *r = (ECDSA_DATA *)data;
159 /* XXX: dummy operation */
163 return ecdsa_data_new();
166 static void ecdsa_data_free(void *data)
168 ECDSA_DATA *r = (ECDSA_DATA *)data;
170 #ifndef OPENSSL_NO_ENGINE
172 ENGINE_finish(r->engine);
174 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDSA, r, &r->ex_data);
176 OPENSSL_cleanse((void *)r, sizeof(ECDSA_DATA));
181 ECDSA_DATA *ecdsa_check(EC_KEY *key)
183 ECDSA_DATA *ecdsa_data;
185 void *data = EC_KEY_get_key_method_data(key, ecdsa_data_dup,
186 ecdsa_data_free, ecdsa_data_free);
189 ecdsa_data = (ECDSA_DATA *)ecdsa_data_new();
190 if (ecdsa_data == NULL)
192 EC_KEY_insert_key_method_data(key, (void *)ecdsa_data,
193 ecdsa_data_dup, ecdsa_data_free, ecdsa_data_free);
196 ecdsa_data = (ECDSA_DATA *)data;
202 int ECDSA_size(const EC_KEY *r)
207 unsigned char buf[4];
208 const EC_GROUP *group = EC_KEY_get0_group(r);
210 if (r == NULL || group == NULL)
212 if ((order = BN_new()) == NULL) return 0;
213 if (!EC_GROUP_get_order(group,order,NULL))
215 BN_clear_free(order);
218 i=BN_num_bits(order);
221 bs.type=V_ASN1_INTEGER;
222 /* If the top bit is set the asn1 encoding is 1 larger. */
225 i=i2d_ASN1_INTEGER(&bs,NULL);
227 ret=ASN1_object_size(1,i,V_ASN1_SEQUENCE);
228 BN_clear_free(order);
233 int ECDSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
234 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
236 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ECDSA, argl, argp,
237 new_func, dup_func, free_func);
240 int ECDSA_set_ex_data(EC_KEY *d, int idx, void *arg)
243 ecdsa = ecdsa_check(d);
246 return(CRYPTO_set_ex_data(&ecdsa->ex_data,idx,arg));
249 void *ECDSA_get_ex_data(EC_KEY *d, int idx)
252 ecdsa = ecdsa_check(d);
255 return(CRYPTO_get_ex_data(&ecdsa->ex_data,idx));