1 /* Written by Dr Stephen N Henson (steve (at) openssl.org) for the OpenSSL 2 * project 2000. */ 3 /* ==================================================================== 4 * Copyright (c) 2000-2005 The OpenSSL Project. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 18 * 3. All advertising materials mentioning features or use of this 19 * software must display the following acknowledgment: 20 * "This product includes software developed by the OpenSSL Project 21 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 22 * 23 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 24 * endorse or promote products derived from this software without 25 * prior written permission. For written permission, please contact 26 * licensing (at) OpenSSL.org. 27 * 28 * 5. Products derived from this software may not be called "OpenSSL" 29 * nor may "OpenSSL" appear in their names without prior written 30 * permission of the OpenSSL Project. 31 * 32 * 6. Redistributions of any form whatsoever must retain the following 33 * acknowledgment: 34 * "This product includes software developed by the OpenSSL Project 35 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 36 * 37 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 38 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 39 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 40 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 43 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 44 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 45 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 46 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 47 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 48 * OF THE POSSIBILITY OF SUCH DAMAGE. 49 * ==================================================================== 50 * 51 * This product includes cryptographic software written by Eric Young 52 * (eay (at) cryptsoft.com). This product includes software written by Tim 53 * Hudson (tjh (at) cryptsoft.com). */ 54 55 #include <openssl/dsa.h> 56 57 #include <string.h> 58 59 #include <openssl/asn1.h> 60 #include <openssl/asn1t.h> 61 #include <openssl/err.h> 62 #include <openssl/mem.h> 63 64 #include "internal.h" 65 66 67 static int dsa_sig_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, 68 void *exarg) { 69 if (operation != ASN1_OP_NEW_PRE) { 70 return 1; 71 } 72 73 DSA_SIG *sig; 74 sig = OPENSSL_malloc(sizeof(DSA_SIG)); 75 if (!sig) { 76 OPENSSL_PUT_ERROR(DSA, ERR_R_MALLOC_FAILURE); 77 return 0; 78 } 79 80 memset(sig, 0, sizeof(DSA_SIG)); 81 *pval = (ASN1_VALUE *)sig; 82 return 2; 83 } 84 85 ASN1_SEQUENCE_cb(DSA_SIG, dsa_sig_cb) = { 86 ASN1_SIMPLE(DSA_SIG, r, CBIGNUM), 87 ASN1_SIMPLE(DSA_SIG, s, CBIGNUM)} ASN1_SEQUENCE_END_cb(DSA_SIG, DSA_SIG); 88 89 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA_SIG, DSA_SIG, DSA_SIG); 90 91 92 static int dsa_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, 93 void *exarg) { 94 switch (operation) { 95 case ASN1_OP_NEW_PRE: 96 *pval = (ASN1_VALUE *)DSA_new(); 97 if (*pval) { 98 return 2; 99 } 100 return 0; 101 102 case ASN1_OP_FREE_PRE: 103 DSA_free((DSA *)*pval); 104 *pval = NULL; 105 return 2; 106 107 default: 108 return 1; 109 } 110 } 111 112 ASN1_SEQUENCE_cb(DSAPrivateKey, dsa_cb) = { 113 ASN1_SIMPLE(DSA, version, LONG), 114 ASN1_SIMPLE(DSA, p, BIGNUM), 115 ASN1_SIMPLE(DSA, q, BIGNUM), 116 ASN1_SIMPLE(DSA, g, BIGNUM), 117 ASN1_SIMPLE(DSA, pub_key, BIGNUM), 118 ASN1_SIMPLE(DSA, priv_key, BIGNUM)} ASN1_SEQUENCE_END_cb(DSA, 119 DSAPrivateKey); 120 121 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA, DSAPrivateKey, DSAPrivateKey); 122 123 ASN1_SEQUENCE_cb(DSAparams, dsa_cb) = { 124 ASN1_SIMPLE(DSA, p, BIGNUM), ASN1_SIMPLE(DSA, q, BIGNUM), 125 ASN1_SIMPLE(DSA, g, BIGNUM), } ASN1_SEQUENCE_END_cb(DSA, DSAparams); 126 127 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA, DSAparams, DSAparams); 128 129 130 /* DSA public key is a bit trickier... its effectively a CHOICE type decided by 131 * a field called write_params which can either write out just the public key 132 * as an INTEGER or the parameters and public key in a SEQUENCE. */ 133 134 ASN1_SEQUENCE(dsa_pub_internal) = { 135 ASN1_SIMPLE(DSA, pub_key, BIGNUM), 136 ASN1_SIMPLE(DSA, p, BIGNUM), 137 ASN1_SIMPLE(DSA, q, BIGNUM), 138 ASN1_SIMPLE(DSA, g, BIGNUM) 139 } ASN1_SEQUENCE_END_name(DSA, dsa_pub_internal); 140 141 ASN1_CHOICE_cb(DSAPublicKey, dsa_cb) = { 142 ASN1_SIMPLE(DSA, pub_key, BIGNUM), 143 ASN1_EX_COMBINE(0, 0, dsa_pub_internal) 144 } ASN1_CHOICE_END_cb(DSA, DSAPublicKey, write_params); 145 146 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA, DSAPublicKey, DSAPublicKey); 147 148 DSA *DSAparams_dup(const DSA *dsa) { 149 return ASN1_item_dup(ASN1_ITEM_rptr(DSAparams), (DSA*) dsa); 150 } 151
