2 * Copyright (c) 2006 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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38 RCSID("$Id: dsa.c 17496 2006-05-07 11:31:58Z lha $");
53 DSA *dsa = calloc(1, sizeof(*dsa));
54 dsa->meth = rk_UNCONST(DSA_get_default_method());
62 if (dsa->references <= 0)
65 if (--dsa->references > 0)
68 (*dsa->meth->finish)(dsa);
70 #define free_if(f) if (f) { BN_free(f); }
74 free_if(dsa->pub_key);
75 free_if(dsa->priv_key);
80 memset(dsa, 0, sizeof(*dsa));
88 return ++dsa->references;
95 static const DSA_METHOD dsa_null_method = {
100 DSA_null_method(void)
102 return &dsa_null_method;
106 const DSA_METHOD *dsa_default_mech = &dsa_null_method;
109 DSA_set_default_method(const DSA_METHOD *mech)
111 dsa_default_mech = mech;
115 DSA_get_default_method(void)
117 return dsa_default_mech;
121 DSA_verify(int type, const unsigned char * digest, int digest_len,
122 const unsigned char *sig, int sig_len, DSA *dsa)