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).
55 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
56 * All rights reserved.
58 * This package is an SSL implementation written
59 * by Eric Young (eay@cryptsoft.com).
60 * The implementation was written so as to conform with Netscapes SSL.
62 * This library is free for commercial and non-commercial use as long as
63 * the following conditions are aheared to. The following conditions
64 * apply to all code found in this distribution, be it the RC4, RSA,
65 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
66 * included with this distribution is covered by the same copyright terms
67 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
69 * Copyright remains Eric Young's, and as such any Copyright notices in
70 * the code are not to be removed.
71 * If this package is used in a product, Eric Young should be given attribution
72 * as the author of the parts of the library used.
73 * This can be in the form of a textual message at program startup or
74 * in documentation (online or textual) provided with the package.
76 * Redistribution and use in source and binary forms, with or without
77 * modification, are permitted provided that the following conditions
79 * 1. Redistributions of source code must retain the copyright
80 * notice, this list of conditions and the following disclaimer.
81 * 2. Redistributions in binary form must reproduce the above copyright
82 * notice, this list of conditions and the following disclaimer in the
83 * documentation and/or other materials provided with the distribution.
84 * 3. All advertising materials mentioning features or use of this software
85 * must display the following acknowledgement:
86 * "This product includes cryptographic software written by
87 * Eric Young (eay@cryptsoft.com)"
88 * The word 'cryptographic' can be left out if the rouines from the library
89 * being used are not cryptographic related :-).
90 * 4. If you include any Windows specific code (or a derivative thereof) from
91 * the apps directory (application code) you must include an acknowledgement:
92 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
94 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
95 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
96 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
97 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
98 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
99 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
100 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
101 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
102 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
103 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
106 * The licence and distribution terms for any publically available version or
107 * derivative of this code cannot be changed. i.e. this code cannot simply be
108 * copied and put under another distribution licence
109 * [including the GNU Public Licence.]
112 #include "cryptlib.h"
113 #include "ecs_locl.h"
114 #include <openssl/engine.h>
116 const char *ECDSA_version="ECDSA" OPENSSL_VERSION_PTEXT;
118 static const ECDSA_METHOD *default_ECDSA_method = NULL;
120 void ECDSA_set_default_method(const ECDSA_METHOD *meth)
122 default_ECDSA_method = meth;
125 const ECDSA_METHOD *ECDSA_get_default_method(void)
127 if(!default_ECDSA_method)
128 default_ECDSA_method = ECDSA_OpenSSL();
129 return default_ECDSA_method;
132 ECDSA *ECDSA_new(void)
134 return ECDSA_new_method(NULL);
137 int ECDSA_set_method(ECDSA *ecdsa, const ECDSA_METHOD *meth)
139 const ECDSA_METHOD *mtmp;
141 if (mtmp->finish) mtmp->finish(ecdsa);
144 ENGINE_finish(ecdsa->engine);
145 ecdsa->engine = NULL;
148 if (meth->init) meth->init(ecdsa);
152 ECDSA *ECDSA_new_method(ENGINE *engine)
156 ret=(ECDSA *)OPENSSL_malloc(sizeof(ECDSA));
159 ECDSAerr(ECDSA_F_ECDSA_NEW,ERR_R_MALLOC_FAILURE);
163 ret->meth = ECDSA_get_default_method();
164 ret->engine = engine;
166 ret->engine = ENGINE_get_default_ECDSA();
169 ret->meth = ENGINE_get_ECDSA(ret->engine);
172 ECDSAerr(ECDSA_R_ECDSA_F_ECDSA_NEW, ERR_R_ENGINE_LIB);
173 ENGINE_finish(ret->engine);
184 ret->priv_key = NULL;
192 ret->parameter_flags = 0;
195 ret->flags = ret->meth->flags;
196 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ECDSA, ret, &ret->ex_data);
197 if ((ret->meth->init != NULL) && !ret->meth->init(ret))
199 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDSA, ret, &ret->ex_data);
207 void ECDSA_free(ECDSA *r)
211 if (r == NULL) return;
213 i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_ECDSA);
215 REF_PRINT("ECDSA",r);
221 fprintf(stderr,"ECDSA_free, bad reference count\n");
229 ENGINE_finish(r->engine);
231 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDSA, r, &r->ex_data);
233 if (r->group != NULL) EC_GROUP_free(r->group);
234 if (r->pub_key != NULL) EC_POINT_free(r->pub_key);
235 if (r->priv_key != NULL) BN_clear_free(r->priv_key);
236 if (r->kinv != NULL) BN_clear_free(r->kinv);
237 if (r->r != NULL) BN_clear_free(r->r);
238 if (r->seed != NULL) OPENSSL_free(r->seed);
242 int ECDSA_size(const ECDSA *r)
247 unsigned char buf[4];
249 if (r == NULL || r->group == NULL)
251 if ((order = BN_new()) == NULL) return 0;
252 if (!EC_GROUP_get_order(r->group,order,NULL))
254 BN_clear_free(order);
257 i=BN_num_bits(order);
260 bs.type=V_ASN1_INTEGER;
261 /* If the top bit is set the asn1 encoding is 1 larger. */
264 i=i2d_ASN1_INTEGER(&bs,NULL);
266 ret=ASN1_object_size(1,i,V_ASN1_SEQUENCE);
267 BN_clear_free(order);
271 int ECDSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
272 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
274 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ECDSA, argl, argp,
275 new_func, dup_func, free_func);
278 int ECDSA_set_ex_data(ECDSA *d, int idx, void *arg)
280 return(CRYPTO_set_ex_data(&d->ex_data,idx,arg));
283 void *ECDSA_get_ex_data(ECDSA *d, int idx)
285 return(CRYPTO_get_ex_data(&d->ex_data,idx));
288 int ECDSA_up_ref(ECDSA *ecdsa)
290 int i = CRYPTO_add(&ecdsa->references, 1, CRYPTO_LOCK_ECDSA);
292 REF_PRINT("ECDSA",r);
297 fprintf(stderr, "ECDSA_up_ref, bad reference count\n");
301 return ((i > 1) ? 1 : 0);
304 void ECDSA_set_parameter_flags(ECDSA *ecdsa, int flag)
306 ecdsa->parameter_flags = flag;
309 int ECDSA_get_parameter_flags(const ECDSA *ecdsa)
311 return ecdsa->parameter_flags;