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 } 124