• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 /* crypto/ecdsa/ecdsa_sign.c */
2 /* ====================================================================
3  * Copyright (c) 1998-2002 The OpenSSL Project.  All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  *
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  *
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
15  *    distribution.
16  *
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/)"
21  *
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.
26  *
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.
30  *
31  * 6. Redistributions of any form whatsoever must retain the following
32  *    acknowledgment:
33  *    "This product includes software developed by the OpenSSL Project
34  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
35  *
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  * ====================================================================
49  *
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).
53  *
54  */
55 
56 #include "ecs_locl.h"
57 #ifndef OPENSSL_NO_ENGINE
58 #include <openssl/engine.h>
59 #endif
60 #include <openssl/rand.h>
61 
ECDSA_do_sign(const unsigned char * dgst,int dlen,EC_KEY * eckey)62 ECDSA_SIG *ECDSA_do_sign(const unsigned char *dgst, int dlen, EC_KEY *eckey)
63 {
64 	return ECDSA_do_sign_ex(dgst, dlen, NULL, NULL, eckey);
65 }
66 
ECDSA_do_sign_ex(const unsigned char * dgst,int dlen,const BIGNUM * kinv,const BIGNUM * rp,EC_KEY * eckey)67 ECDSA_SIG *ECDSA_do_sign_ex(const unsigned char *dgst, int dlen,
68 	const BIGNUM *kinv, const BIGNUM *rp, EC_KEY *eckey)
69 {
70 	ECDSA_DATA *ecdsa = ecdsa_check(eckey);
71 	if (ecdsa == NULL)
72 		return NULL;
73 	return ecdsa->meth->ecdsa_do_sign(dgst, dlen, kinv, rp, eckey);
74 }
75 
ECDSA_sign(int type,const unsigned char * dgst,int dlen,unsigned char * sig,unsigned int * siglen,EC_KEY * eckey)76 int ECDSA_sign(int type, const unsigned char *dgst, int dlen, unsigned char
77 		*sig, unsigned int *siglen, EC_KEY *eckey)
78 {
79 	return ECDSA_sign_ex(type, dgst, dlen, sig, siglen, NULL, NULL, eckey);
80 }
81 
ECDSA_sign_ex(int type,const unsigned char * dgst,int dlen,unsigned char * sig,unsigned int * siglen,const BIGNUM * kinv,const BIGNUM * r,EC_KEY * eckey)82 int ECDSA_sign_ex(int type, const unsigned char *dgst, int dlen, unsigned char
83 	*sig, unsigned int *siglen, const BIGNUM *kinv, const BIGNUM *r,
84 	EC_KEY *eckey)
85 {
86 	ECDSA_SIG *s;
87 	RAND_seed(dgst, dlen);
88 	s = ECDSA_do_sign_ex(dgst, dlen, kinv, r, eckey);
89 	if (s == NULL)
90 	{
91 		*siglen=0;
92 		return 0;
93 	}
94 	*siglen = i2d_ECDSA_SIG(s, &sig);
95 	ECDSA_SIG_free(s);
96 	return 1;
97 }
98 
ECDSA_sign_setup(EC_KEY * eckey,BN_CTX * ctx_in,BIGNUM ** kinvp,BIGNUM ** rp)99 int ECDSA_sign_setup(EC_KEY *eckey, BN_CTX *ctx_in, BIGNUM **kinvp,
100 		BIGNUM **rp)
101 {
102 	ECDSA_DATA *ecdsa = ecdsa_check(eckey);
103 	if (ecdsa == NULL)
104 		return 0;
105 	return ecdsa->meth->ecdsa_sign_setup(eckey, ctx_in, kinvp, rp);
106 }
107