1 /* $NetBSD: dsa.c,v 1.2 2017/01/28 21:31:47 christos 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 #include <krb5/roken.h>
38
39 #include <dsa.h>
40
41 /*
42 *
43 */
44
45 DSA *
DSA_new(void)46 DSA_new(void)
47 {
48 DSA *dsa = calloc(1, sizeof(*dsa));
49 dsa->meth = rk_UNCONST(DSA_get_default_method());
50 dsa->references = 1;
51 return dsa;
52 }
53
54 void
DSA_free(DSA * dsa)55 DSA_free(DSA *dsa)
56 {
57 if (dsa->references <= 0)
58 abort();
59
60 if (--dsa->references > 0)
61 return;
62
63 (*dsa->meth->finish)(dsa);
64
65 #define free_if(f) if (f) { BN_free(f); }
66 free_if(dsa->p);
67 free_if(dsa->q);
68 free_if(dsa->g);
69 free_if(dsa->pub_key);
70 free_if(dsa->priv_key);
71 free_if(dsa->kinv);
72 free_if(dsa->r);
73 #undef free_if
74
75 memset(dsa, 0, sizeof(*dsa));
76 free(dsa);
77
78 }
79
80 int
DSA_up_ref(DSA * dsa)81 DSA_up_ref(DSA *dsa)
82 {
83 return ++dsa->references;
84 }
85
86 /*
87 *
88 */
89
90 static const DSA_METHOD dsa_null_method = {
91 "hcrypto null DSA",
92 NULL,
93 NULL,
94 NULL,
95 NULL,
96 NULL,
97 NULL,
98 NULL,
99 0,
100 NULL
101 };
102
103 const DSA_METHOD *
DSA_null_method(void)104 DSA_null_method(void)
105 {
106 return &dsa_null_method;
107 }
108
109
110 const DSA_METHOD *dsa_default_mech = &dsa_null_method;
111
112 void
DSA_set_default_method(const DSA_METHOD * mech)113 DSA_set_default_method(const DSA_METHOD *mech)
114 {
115 dsa_default_mech = mech;
116 }
117
118 const DSA_METHOD *
DSA_get_default_method(void)119 DSA_get_default_method(void)
120 {
121 return dsa_default_mech;
122 }
123
124 int
DSA_verify(int type,const unsigned char * digest,int digest_len,const unsigned char * sig,int sig_len,DSA * dsa)125 DSA_verify(int type, const unsigned char * digest, int digest_len,
126 const unsigned char *sig, int sig_len, DSA *dsa)
127 {
128 return -1;
129 }
130