ecs_sign.c revision 296465 
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
62ECDSA_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
67ECDSA_SIG *ECDSA_do_sign_ex(const unsigned char *dgst, int dlen,
68                            const BIGNUM *kinv, const BIGNUM *rp,
69                            EC_KEY *eckey)
70{
71    ECDSA_DATA *ecdsa = ecdsa_check(eckey);
72    if (ecdsa == NULL)
73        return NULL;
74    return ecdsa->meth->ecdsa_do_sign(dgst, dlen, kinv, rp, eckey);
75}
76
77int ECDSA_sign(int type, const unsigned char *dgst, int dlen, unsigned char
78               *sig, unsigned int *siglen, EC_KEY *eckey)
79{
80    return ECDSA_sign_ex(type, dgst, dlen, sig, siglen, NULL, NULL, eckey);
81}
82
83int ECDSA_sign_ex(int type, const unsigned char *dgst, int dlen, unsigned char
84                  *sig, unsigned int *siglen, const BIGNUM *kinv,
85                  const BIGNUM *r, EC_KEY *eckey)
86{
87    ECDSA_SIG *s;
88    RAND_seed(dgst, dlen);
89    s = ECDSA_do_sign_ex(dgst, dlen, kinv, r, eckey);
90    if (s == NULL) {
91        *siglen = 0;
92        return 0;
93    }
94    *siglen = i2d_ECDSA_SIG(s, &sig);
95    ECDSA_SIG_free(s);
96    return 1;
97}
98
99int 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