1 /* dsa_asn1.c */ 2 /* Written by Dr Stephen N Henson (steve (at) openssl.org) for the OpenSSL 3 * project 2000. 4 */ 5 /* ==================================================================== 6 * Copyright (c) 2000-2005 The OpenSSL Project. 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 17 * the documentation and/or other materials provided with the 18 * distribution. 19 * 20 * 3. All advertising materials mentioning features or use of this 21 * software must display the following acknowledgment: 22 * "This product includes software developed by the OpenSSL Project 23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 24 * 25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 26 * endorse or promote products derived from this software without 27 * prior written permission. For written permission, please contact 28 * licensing (at) OpenSSL.org. 29 * 30 * 5. Products derived from this software may not be called "OpenSSL" 31 * nor may "OpenSSL" appear in their names without prior written 32 * permission of the OpenSSL Project. 33 * 34 * 6. Redistributions of any form whatsoever must retain the following 35 * acknowledgment: 36 * "This product includes software developed by the OpenSSL Project 37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 38 * 39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 50 * OF THE POSSIBILITY OF SUCH DAMAGE. 51 * ==================================================================== 52 * 53 * This product includes cryptographic software written by Eric Young 54 * (eay (at) cryptsoft.com). This product includes software written by Tim 55 * Hudson (tjh (at) cryptsoft.com). 56 * 57 */ 58 59 #include <stdio.h> 60 #include "cryptlib.h" 61 #include <openssl/dsa.h> 62 #include <openssl/asn1.h> 63 #include <openssl/asn1t.h> 64 65 /* Override the default new methods */ 66 static int sig_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, 67 void *exarg) 68 { 69 if(operation == ASN1_OP_NEW_PRE) { 70 DSA_SIG *sig; 71 sig = OPENSSL_malloc(sizeof(DSA_SIG)); 72 if (!sig) 73 { 74 DSAerr(DSA_F_SIG_CB, ERR_R_MALLOC_FAILURE); 75 return 0; 76 } 77 sig->r = NULL; 78 sig->s = NULL; 79 *pval = (ASN1_VALUE *)sig; 80 return 2; 81 } 82 return 1; 83 } 84 85 ASN1_SEQUENCE_cb(DSA_SIG, sig_cb) = { 86 ASN1_SIMPLE(DSA_SIG, r, CBIGNUM), 87 ASN1_SIMPLE(DSA_SIG, s, CBIGNUM) 88 } ASN1_SEQUENCE_END_cb(DSA_SIG, DSA_SIG) 89 90 IMPLEMENT_ASN1_FUNCTIONS_const(DSA_SIG) 91 92 /* Override the default free and new methods */ 93 static int dsa_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, 94 void *exarg) 95 { 96 if(operation == ASN1_OP_NEW_PRE) { 97 *pval = (ASN1_VALUE *)DSA_new(); 98 if(*pval) return 2; 99 return 0; 100 } else if(operation == ASN1_OP_FREE_PRE) { 101 DSA_free((DSA *)*pval); 102 *pval = NULL; 103 return 2; 104 } 105 return 1; 106 } 107 108 ASN1_SEQUENCE_cb(DSAPrivateKey, dsa_cb) = { 109 ASN1_SIMPLE(DSA, version, LONG), 110 ASN1_SIMPLE(DSA, p, BIGNUM), 111 ASN1_SIMPLE(DSA, q, BIGNUM), 112 ASN1_SIMPLE(DSA, g, BIGNUM), 113 ASN1_SIMPLE(DSA, pub_key, BIGNUM), 114 ASN1_SIMPLE(DSA, priv_key, BIGNUM) 115 } ASN1_SEQUENCE_END_cb(DSA, DSAPrivateKey) 116 117 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA, DSAPrivateKey, DSAPrivateKey) 118 119 ASN1_SEQUENCE_cb(DSAparams, dsa_cb) = { 120 ASN1_SIMPLE(DSA, p, BIGNUM), 121 ASN1_SIMPLE(DSA, q, BIGNUM), 122 ASN1_SIMPLE(DSA, g, BIGNUM), 123 } ASN1_SEQUENCE_END_cb(DSA, DSAparams) 124 125 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA, DSAparams, DSAparams) 126 127 /* DSA public key is a bit trickier... its effectively a CHOICE type 128 * decided by a field called write_params which can either write out 129 * just the public key as an INTEGER or the parameters and public key 130 * in a SEQUENCE 131 */ 132 133 ASN1_SEQUENCE(dsa_pub_internal) = { 134 ASN1_SIMPLE(DSA, pub_key, BIGNUM), 135 ASN1_SIMPLE(DSA, p, BIGNUM), 136 ASN1_SIMPLE(DSA, q, BIGNUM), 137 ASN1_SIMPLE(DSA, g, BIGNUM) 138 } ASN1_SEQUENCE_END_name(DSA, dsa_pub_internal) 139 140 ASN1_CHOICE_cb(DSAPublicKey, dsa_cb) = { 141 ASN1_SIMPLE(DSA, pub_key, BIGNUM), 142 ASN1_EX_COMBINE(0, 0, dsa_pub_internal) 143 } ASN1_CHOICE_END_cb(DSA, DSAPublicKey, write_params) 144 145 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA, DSAPublicKey, DSAPublicKey) 146 147 DSA *DSAparams_dup(DSA *dsa) 148 { 149 return ASN1_item_dup(ASN1_ITEM_rptr(DSAparams), dsa); 150 } 151
