1 /* $OpenBSD: ecs_sign.c,v 1.5 2014/10/18 17:20:40 jsing Exp $ */
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 <openssl/opensslconf.h>
57 
58 #include "ecs_locl.h"
59 #ifndef OPENSSL_NO_ENGINE
60 #include <openssl/engine.h>
61 #endif
62 
63 ECDSA_SIG *
64 ECDSA_do_sign(const unsigned char *dgst, int dlen, EC_KEY *eckey)
65 {
66 	return ECDSA_do_sign_ex(dgst, dlen, NULL, NULL, eckey);
67 }
68 
69 ECDSA_SIG *
70 ECDSA_do_sign_ex(const unsigned char *dgst, int dlen, const BIGNUM *kinv,
71     const BIGNUM *rp, EC_KEY *eckey)
72 {
73 	ECDSA_DATA *ecdsa = ecdsa_check(eckey);
74 
75 	if (ecdsa == NULL)
76 		return NULL;
77 	return ecdsa->meth->ecdsa_do_sign(dgst, dlen, kinv, rp, eckey);
78 }
79 
80 int
81 ECDSA_sign(int type, const unsigned char *dgst, int dlen, unsigned char *sig,
82     unsigned int *siglen, EC_KEY *eckey)
83 {
84 	return ECDSA_sign_ex(type, dgst, dlen, sig, siglen, NULL, NULL, eckey);
85 }
86 
87 int
88 ECDSA_sign_ex(int type, const unsigned char *dgst, int dlen, unsigned char *sig,
89     unsigned int *siglen, const BIGNUM *kinv, const BIGNUM *r, EC_KEY *eckey)
90 {
91 	ECDSA_SIG *s;
92 
93 	s = ECDSA_do_sign_ex(dgst, dlen, kinv, r, eckey);
94 	if (s == NULL) {
95 		*siglen = 0;
96 		return 0;
97 	}
98 	*siglen = i2d_ECDSA_SIG(s, &sig);
99 	ECDSA_SIG_free(s);
100 	return 1;
101 }
102 
103 int
104 ECDSA_sign_setup(EC_KEY *eckey, BN_CTX *ctx_in, BIGNUM **kinvp, BIGNUM **rp)
105 {
106 	ECDSA_DATA *ecdsa = ecdsa_check(eckey);
107 
108 	if (ecdsa == NULL)
109 		return 0;
110 	return ecdsa->meth->ecdsa_sign_setup(eckey, ctx_in, kinvp, rp);
111 }
112