crypto/external/bsd/heimdal/dist/lib/hcrypto/dsa.c

   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 *
  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
  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
  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 *
  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
 107 DSA_set_default_method(const DSA_METHOD *mech)
 108 {
 109     dsa_default_mech = mech;
 110 }
 111
 112 const DSA_METHOD *
 113 DSA_get_default_method(void)
 114 {
 115     return dsa_default_mech;
 116 }
 117
 118 int
 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 }