1 /* $NetBSD: dsa.c,v 1.1.1.1 2011/04/13 18:14:49 elric Exp $ */
2
3 /*
4 * Copyright (c) 2006 Kungliga Tekniska Högskolan
5 * (Royal Institute of Technology, Stockholm, Sweden).
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * 3. Neither the name of the Institute nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 #include <config.h>
37
38 #include <stdio.h>
39 #include <stdlib.h>
40 #include <dsa.h>
41
42 #include <krb5/roken.h>
43
44 /*
45 *
46 */
47
48 DSA *
DSA_new(void)49 DSA_new(void)
50 {
51 DSA *dsa = calloc(1, sizeof(*dsa));
52 dsa->meth = rk_UNCONST(DSA_get_default_method());
53 dsa->references = 1;
54 return dsa;
55 }
56
57 void
DSA_free(DSA * dsa)58 DSA_free(DSA *dsa)
59 {
60 if (dsa->references <= 0)
61 abort();
62
63 if (--dsa->references > 0)
64 return;
65
66 (*dsa->meth->finish)(dsa);
67
68 #define free_if(f) if (f) { BN_free(f); }
69 free_if(dsa->p);
70 free_if(dsa->q);
71 free_if(dsa->g);
72 free_if(dsa->pub_key);
73 free_if(dsa->priv_key);
74 free_if(dsa->kinv);
75 free_if(dsa->r);
76 #undef free_if
77
78 memset(dsa, 0, sizeof(*dsa));
79 free(dsa);
80
81 }
82
83 int
DSA_up_ref(DSA * dsa)84 DSA_up_ref(DSA *dsa)
85 {
86 return ++dsa->references;
87 }
88
89 /*
90 *
91 */
92
93 static const DSA_METHOD dsa_null_method = {
94 "hcrypto null DSA"
95 };
96
97 const DSA_METHOD *
DSA_null_method(void)98 DSA_null_method(void)
99 {
100 return &dsa_null_method;
101 }
102
103
104 const DSA_METHOD *dsa_default_mech = &dsa_null_method;
105
106 void
DSA_set_default_method(const DSA_METHOD * mech)107 DSA_set_default_method(const DSA_METHOD *mech)
108 {
109 dsa_default_mech = mech;
110 }
111
112 const DSA_METHOD *
DSA_get_default_method(void)113 DSA_get_default_method(void)
114 {
115 return dsa_default_mech;
116 }
117
118 int
DSA_verify(int type,const unsigned char * digest,int digest_len,const unsigned char * sig,int sig_len,DSA * dsa)119 DSA_verify(int type, const unsigned char * digest, int digest_len,
120 const unsigned char *sig, int sig_len, DSA *dsa)
121 {
122 return -1;
123 }
124