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| 1 /* dsa_asn1.c */ | |
| 2 /* Written by Dr Stephen N Henson (steve@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@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@cryptsoft.com). This product includes software written by Tim | |
| 55 * Hudson (tjh@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 #include <openssl/rand.h> | |
| 65 | |
| 66 /* Override the default new methods */ | |
| 67 static int sig_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, | |
| 68 void *exarg) | |
| 69 { | |
| 70 if(operation == ASN1_OP_NEW_PRE) { | |
| 71 DSA_SIG *sig; | |
| 72 sig = OPENSSL_malloc(sizeof(DSA_SIG)); | |
| 73 if (!sig) | |
| 74 { | |
| 75 DSAerr(DSA_F_SIG_CB, ERR_R_MALLOC_FAILURE); | |
| 76 return 0; | |
| 77 } | |
| 78 sig->r = NULL; | |
| 79 sig->s = NULL; | |
| 80 *pval = (ASN1_VALUE *)sig; | |
| 81 return 2; | |
| 82 } | |
| 83 return 1; | |
| 84 } | |
| 85 | |
| 86 ASN1_SEQUENCE_cb(DSA_SIG, sig_cb) = { | |
| 87 ASN1_SIMPLE(DSA_SIG, r, CBIGNUM), | |
| 88 ASN1_SIMPLE(DSA_SIG, s, CBIGNUM) | |
| 89 } ASN1_SEQUENCE_END_cb(DSA_SIG, DSA_SIG) | |
| 90 | |
| 91 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA_SIG, DSA_SIG, DSA_SIG) | |
| 92 | |
| 93 /* Override the default free and new methods */ | |
| 94 static int dsa_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, | |
| 95 void *exarg) | |
| 96 { | |
| 97 if(operation == ASN1_OP_NEW_PRE) { | |
| 98 *pval = (ASN1_VALUE *)DSA_new(); | |
| 99 if(*pval) return 2; | |
| 100 return 0; | |
| 101 } else if(operation == ASN1_OP_FREE_PRE) { | |
| 102 DSA_free((DSA *)*pval); | |
| 103 *pval = NULL; | |
| 104 return 2; | |
| 105 } | |
| 106 return 1; | |
| 107 } | |
| 108 | |
| 109 ASN1_SEQUENCE_cb(DSAPrivateKey, dsa_cb) = { | |
| 110 ASN1_SIMPLE(DSA, version, LONG), | |
| 111 ASN1_SIMPLE(DSA, p, BIGNUM), | |
| 112 ASN1_SIMPLE(DSA, q, BIGNUM), | |
| 113 ASN1_SIMPLE(DSA, g, BIGNUM), | |
| 114 ASN1_SIMPLE(DSA, pub_key, BIGNUM), | |
| 115 ASN1_SIMPLE(DSA, priv_key, BIGNUM) | |
| 116 } ASN1_SEQUENCE_END_cb(DSA, DSAPrivateKey) | |
| 117 | |
| 118 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA, DSAPrivateKey, DSAPrivateKey) | |
| 119 | |
| 120 ASN1_SEQUENCE_cb(DSAparams, dsa_cb) = { | |
| 121 ASN1_SIMPLE(DSA, p, BIGNUM), | |
| 122 ASN1_SIMPLE(DSA, q, BIGNUM), | |
| 123 ASN1_SIMPLE(DSA, g, BIGNUM), | |
| 124 } ASN1_SEQUENCE_END_cb(DSA, DSAparams) | |
| 125 | |
| 126 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA, DSAparams, DSAparams) | |
| 127 | |
| 128 /* DSA public key is a bit trickier... its effectively a CHOICE type | |
| 129 * decided by a field called write_params which can either write out | |
| 130 * just the public key as an INTEGER or the parameters and public key | |
| 131 * in a SEQUENCE | |
| 132 */ | |
| 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(DSA *dsa) | |
| 149 { | |
| 150 return ASN1_item_dup(ASN1_ITEM_rptr(DSAparams), dsa); | |
| 151 } | |
| 152 | |
| 153 int DSA_sign(int type, const unsigned char *dgst, int dlen, unsigned char *sig, | |
| 154 unsigned int *siglen, DSA *dsa) | |
| 155 { | |
| 156 DSA_SIG *s; | |
| 157 RAND_seed(dgst, dlen); | |
| 158 s=DSA_do_sign(dgst,dlen,dsa); | |
| 159 if (s == NULL) | |
| 160 { | |
| 161 *siglen=0; | |
| 162 return(0); | |
| 163 } | |
| 164 *siglen=i2d_DSA_SIG(s,&sig); | |
| 165 DSA_SIG_free(s); | |
| 166 return(1); | |
| 167 } | |
| 168 | |
| 169 /* data has already been hashed (probably with SHA or SHA-1). */ | |
| 170 /* returns | |
| 171 * 1: correct signature | |
| 172 * 0: incorrect signature | |
| 173 * -1: error | |
| 174 */ | |
| 175 int DSA_verify(int type, const unsigned char *dgst, int dgst_len, | |
| 176 const unsigned char *sigbuf, int siglen, DSA *dsa) | |
| 177 { | |
| 178 DSA_SIG *s; | |
| 179 int ret=-1; | |
| 180 | |
| 181 s = DSA_SIG_new(); | |
| 182 if (s == NULL) return(ret); | |
| 183 if (d2i_DSA_SIG(&s,&sigbuf,siglen) == NULL) goto err; | |
| 184 ret=DSA_do_verify(dgst,dgst_len,s,dsa); | |
| 185 err: | |
| 186 DSA_SIG_free(s); | |
| 187 return(ret); | |
| 188 } | |
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Chromium Code Reviews
Issue 2072073002:
Delete bundled copy of OpenSSL and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master