1 /* crypto/ecdsa/ecs_lib.c */
2 /* ====================================================================
3 * Copyright (c) 1998-2002 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).
57 #include <openssl/engine.h>
59 const char *ECDSA_version="ECDSA" OPENSSL_VERSION_PTEXT;
61 static const ECDSA_METHOD *default_ECDSA_method = NULL;
63 void ECDSA_set_default_method(const ECDSA_METHOD *meth)
65 default_ECDSA_method = meth;
68 const ECDSA_METHOD *ECDSA_get_default_method(void)
70 if(!default_ECDSA_method)
71 default_ECDSA_method = ECDSA_OpenSSL();
72 return default_ECDSA_method;
75 ECDSA *ECDSA_new(void)
77 return ECDSA_new_method(NULL);
80 int ECDSA_set_method(ECDSA *ecdsa, const ECDSA_METHOD *meth)
82 const ECDSA_METHOD *mtmp;
84 if (mtmp->finish) mtmp->finish(ecdsa);
87 ENGINE_finish(ecdsa->engine);
91 if (meth->init) meth->init(ecdsa);
95 ECDSA *ECDSA_new_method(ENGINE *engine)
99 ret=(ECDSA *)OPENSSL_malloc(sizeof(ECDSA));
102 ECDSAerr(ECDSA_F_ECDSA_NEW,ERR_R_MALLOC_FAILURE);
106 ret->meth = ECDSA_get_default_method();
107 ret->engine = engine;
109 ret->engine = ENGINE_get_default_ECDSA();
112 ret->meth = ENGINE_get_ECDSA(ret->engine);
115 ECDSAerr(ECDSA_R_ECDSA_F_ECDSA_NEW, ERR_R_ENGINE_LIB);
116 ENGINE_finish(ret->engine);
123 ret->conversion_form = ECDSA_get_default_conversion_form();
127 ret->priv_key = NULL;
135 ret->flags = ret->meth->flags;
136 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ECDSA, ret, &ret->ex_data);
137 if ((ret->meth->init != NULL) && !ret->meth->init(ret))
139 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDSA, ret, &ret->ex_data);
147 void ECDSA_free(ECDSA *r)
151 if (r == NULL) return;
153 i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_ECDSA);
155 REF_PRINT("ECDSA",r);
161 fprintf(stderr,"ECDSA_free, bad reference count\n");
169 ENGINE_finish(r->engine);
171 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDSA, r, &r->ex_data);
173 if (r->group != NULL) EC_GROUP_free(r->group);
174 if (r->pub_key != NULL) EC_POINT_free(r->pub_key);
175 if (r->priv_key != NULL) BN_clear_free(r->priv_key);
176 if (r->kinv != NULL) BN_clear_free(r->kinv);
177 if (r->r != NULL) BN_clear_free(r->r);
181 int ECDSA_size(const ECDSA *r)
186 unsigned char buf[4];
188 if (r == NULL || r->group == NULL)
190 if ((order = BN_new()) == NULL) return 0;
191 if (!EC_GROUP_get_order(r->group,order,NULL))
193 BN_clear_free(order);
196 i=BN_num_bits(order);
199 bs.type=V_ASN1_INTEGER;
200 /* If the top bit is set the asn1 encoding is 1 larger. */
203 i=i2d_ASN1_INTEGER(&bs,NULL);
205 ret=ASN1_object_size(1,i,V_ASN1_SEQUENCE);
206 BN_clear_free(order);
210 int ECDSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
211 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
213 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ECDSA, argl, argp,
214 new_func, dup_func, free_func);
217 int ECDSA_set_ex_data(ECDSA *d, int idx, void *arg)
219 return(CRYPTO_set_ex_data(&d->ex_data,idx,arg));
222 void *ECDSA_get_ex_data(ECDSA *d, int idx)
224 return(CRYPTO_get_ex_data(&d->ex_data,idx));
227 int ECDSA_up_ref(ECDSA *ecdsa)
229 int i = CRYPTO_add(&ecdsa->references, 1, CRYPTO_LOCK_ECDSA);
231 REF_PRINT("ECDSA",r);
236 fprintf(stderr, "ECDSA_up_ref, bad reference count\n");
240 return ((i > 1) ? 1 : 0);
243 void ECDSA_set_conversion_form(ECDSA *ecdsa, const point_conversion_form_t form)
245 if (ecdsa) ecdsa->conversion_form = form;
248 point_conversion_form_t ECDSA_get_conversion_form(const ECDSA *ecdsa)
250 return ecdsa ? ecdsa->conversion_form : 0;
253 static point_conversion_form_t default_conversion_form = POINT_CONVERSION_UNCOMPRESSED;
255 void ECDSA_set_default_conversion_form(const point_conversion_form_t form)
257 default_conversion_form = form;
260 point_conversion_form_t ECDSA_get_default_conversion_form(void)
262 return default_conversion_form;
265 unsigned int ECDSA_get_enc_flag(const ECDSA *ecdsa)
267 return ecdsa->enc_flag;
270 void ECDSA_set_enc_flag(ECDSA *ecdsa, unsigned int flag)
272 ecdsa->enc_flag = flag;