ocsp_lib.c revision 1.24
1/* $OpenBSD: ocsp_lib.c,v 1.24 2022/01/07 09:45:52 tb Exp $ */ 2/* Written by Tom Titchener <Tom_Titchener@groove.net> for the OpenSSL 3 * project. */ 4 5/* History: 6 This file was transfered to Richard Levitte from CertCo by Kathy 7 Weinhold in mid-spring 2000 to be included in OpenSSL or released 8 as a patch kit. */ 9 10/* ==================================================================== 11 * Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in 22 * the documentation and/or other materials provided with the 23 * distribution. 24 * 25 * 3. All advertising materials mentioning features or use of this 26 * software must display the following acknowledgment: 27 * "This product includes software developed by the OpenSSL Project 28 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 29 * 30 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 31 * endorse or promote products derived from this software without 32 * prior written permission. For written permission, please contact 33 * openssl-core@openssl.org. 34 * 35 * 5. Products derived from this software may not be called "OpenSSL" 36 * nor may "OpenSSL" appear in their names without prior written 37 * permission of the OpenSSL Project. 38 * 39 * 6. Redistributions of any form whatsoever must retain the following 40 * acknowledgment: 41 * "This product includes software developed by the OpenSSL Project 42 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 43 * 44 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 45 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 46 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 47 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 48 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 49 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 50 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 51 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 52 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 53 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 54 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 55 * OF THE POSSIBILITY OF SUCH DAMAGE. 56 * ==================================================================== 57 * 58 * This product includes cryptographic software written by Eric Young 59 * (eay@cryptsoft.com). This product includes software written by Tim 60 * Hudson (tjh@cryptsoft.com). 61 * 62 */ 63 64#include <stdio.h> 65#include <string.h> 66 67#include <openssl/opensslconf.h> 68 69#include <openssl/asn1t.h> 70#include <openssl/err.h> 71#include <openssl/objects.h> 72#include <openssl/ocsp.h> 73#include <openssl/pem.h> 74#include <openssl/x509.h> 75#include <openssl/x509v3.h> 76 77#include "ocsp_local.h" 78 79/* Convert a certificate and its issuer to an OCSP_CERTID */ 80 81OCSP_CERTID * 82OCSP_cert_to_id(const EVP_MD *dgst, const X509 *subject, const X509 *issuer) 83{ 84 X509_NAME *iname; 85 const ASN1_INTEGER *serial; 86 ASN1_BIT_STRING *ikey; 87 88#ifndef OPENSSL_NO_SHA1 89 if (!dgst) 90 dgst = EVP_sha1(); 91#endif 92 if (subject) { 93 iname = X509_get_issuer_name(subject); 94 serial = X509_get0_serialNumber(subject); 95 } else { 96 iname = X509_get_subject_name(issuer); 97 serial = NULL; 98 } 99 ikey = X509_get0_pubkey_bitstr(issuer); 100 return OCSP_cert_id_new(dgst, iname, ikey, serial); 101} 102 103OCSP_CERTID * 104OCSP_cert_id_new(const EVP_MD *dgst, const X509_NAME *issuerName, 105 const ASN1_BIT_STRING *issuerKey, const ASN1_INTEGER *serialNumber) 106{ 107 int nid; 108 unsigned int i; 109 X509_ALGOR *alg; 110 OCSP_CERTID *cid = NULL; 111 unsigned char md[EVP_MAX_MD_SIZE]; 112 113 if (!(cid = OCSP_CERTID_new())) 114 goto err; 115 116 alg = cid->hashAlgorithm; 117 if (alg->algorithm != NULL) 118 ASN1_OBJECT_free(alg->algorithm); 119 if ((nid = EVP_MD_type(dgst)) == NID_undef) { 120 OCSPerror(OCSP_R_UNKNOWN_NID); 121 goto err; 122 } 123 if (!(alg->algorithm = OBJ_nid2obj(nid))) 124 goto err; 125 if ((alg->parameter = ASN1_TYPE_new()) == NULL) 126 goto err; 127 alg->parameter->type = V_ASN1_NULL; 128 129 if (!X509_NAME_digest(issuerName, dgst, md, &i)) 130 goto digerr; 131 if (!(ASN1_OCTET_STRING_set(cid->issuerNameHash, md, i))) 132 goto err; 133 134 /* Calculate the issuerKey hash, excluding tag and length */ 135 if (!EVP_Digest(issuerKey->data, issuerKey->length, md, &i, dgst, NULL)) 136 goto err; 137 138 if (!(ASN1_OCTET_STRING_set(cid->issuerKeyHash, md, i))) 139 goto err; 140 141 if (serialNumber) { 142 ASN1_INTEGER_free(cid->serialNumber); 143 if (!(cid->serialNumber = ASN1_INTEGER_dup(serialNumber))) 144 goto err; 145 } 146 return cid; 147 148digerr: 149 OCSPerror(OCSP_R_DIGEST_ERR); 150err: 151 if (cid) 152 OCSP_CERTID_free(cid); 153 return NULL; 154} 155 156int 157OCSP_id_issuer_cmp(OCSP_CERTID *a, OCSP_CERTID *b) 158{ 159 int ret; 160 161 ret = OBJ_cmp(a->hashAlgorithm->algorithm, b->hashAlgorithm->algorithm); 162 if (ret) 163 return ret; 164 ret = ASN1_OCTET_STRING_cmp(a->issuerNameHash, b->issuerNameHash); 165 if (ret) 166 return ret; 167 return ASN1_OCTET_STRING_cmp(a->issuerKeyHash, b->issuerKeyHash); 168} 169 170int 171OCSP_id_cmp(OCSP_CERTID *a, OCSP_CERTID *b) 172{ 173 int ret; 174 175 ret = OCSP_id_issuer_cmp(a, b); 176 if (ret) 177 return ret; 178 return ASN1_INTEGER_cmp(a->serialNumber, b->serialNumber); 179} 180 181/* Parse a URL and split it up into host, port and path components and whether 182 * it is SSL. 183 */ 184int 185OCSP_parse_url(const char *url, char **phost, char **pport, char **ppath, 186 int *pssl) 187{ 188 char *host, *path, *port, *tmp; 189 190 *phost = *pport = *ppath = NULL; 191 *pssl = 0; 192 193 if (strncmp(url, "https://", 8) == 0) { 194 *pssl = 1; 195 host = strdup(url + 8); 196 } else if (strncmp(url, "http://", 7) == 0) 197 host = strdup(url + 7); 198 else { 199 OCSPerror(OCSP_R_ERROR_PARSING_URL); 200 return 0; 201 } 202 if (host == NULL) { 203 OCSPerror(ERR_R_MALLOC_FAILURE); 204 return 0; 205 } 206 207 if ((tmp = strchr(host, '/')) != NULL) { 208 path = strdup(tmp); 209 *tmp = '\0'; 210 } else 211 path = strdup("/"); 212 213 if ((tmp = strchr(host, ':')) != NULL ) { 214 port = strdup(tmp + 1); 215 *tmp = '\0'; 216 } else { 217 if (*pssl) 218 port = strdup("443"); 219 else 220 port = strdup("80"); 221 } 222 223 if (path == NULL || port == NULL) { 224 free(host); 225 free(path); 226 free(port); 227 OCSPerror(ERR_R_MALLOC_FAILURE); 228 return 0; 229 } 230 231 *phost = host; 232 *ppath = path; 233 *pport = port; 234 return 1; 235} 236 237OCSP_CERTID * 238OCSP_CERTID_dup(OCSP_CERTID *x) 239{ 240 return ASN1_item_dup(&OCSP_CERTID_it, x); 241} 242