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 * 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 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 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 * 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 113 DSA_set_default_method(const DSA_METHOD *mech) 114 { 115 dsa_default_mech = mech; 116 } 117 118 const DSA_METHOD * 119 DSA_get_default_method(void) 120 { 121 return dsa_default_mech; 122 } 123 124 int 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