1 /* $OpenBSD: ocsp_lib.c,v 1.26 2023/07/08 10:44:00 beck 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 81 OCSP_CERTID * 82 OCSP_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 if ((ikey = X509_get0_pubkey_bitstr(issuer)) == NULL) 100 return NULL; 101 102 return OCSP_cert_id_new(dgst, iname, ikey, serial); 103 } 104 LCRYPTO_ALIAS(OCSP_cert_to_id); 105 106 OCSP_CERTID * 107 OCSP_cert_id_new(const EVP_MD *dgst, const X509_NAME *issuerName, 108 const ASN1_BIT_STRING *issuerKey, const ASN1_INTEGER *serialNumber) 109 { 110 int nid; 111 unsigned int i; 112 X509_ALGOR *alg; 113 OCSP_CERTID *cid = NULL; 114 unsigned char md[EVP_MAX_MD_SIZE]; 115 116 if (!(cid = OCSP_CERTID_new())) 117 goto err; 118 119 alg = cid->hashAlgorithm; 120 if (alg->algorithm != NULL) 121 ASN1_OBJECT_free(alg->algorithm); 122 if ((nid = EVP_MD_type(dgst)) == NID_undef) { 123 OCSPerror(OCSP_R_UNKNOWN_NID); 124 goto err; 125 } 126 if (!(alg->algorithm = OBJ_nid2obj(nid))) 127 goto err; 128 if ((alg->parameter = ASN1_TYPE_new()) == NULL) 129 goto err; 130 alg->parameter->type = V_ASN1_NULL; 131 132 if (!X509_NAME_digest(issuerName, dgst, md, &i)) 133 goto digerr; 134 if (!(ASN1_OCTET_STRING_set(cid->issuerNameHash, md, i))) 135 goto err; 136 137 /* Calculate the issuerKey hash, excluding tag and length */ 138 if (!EVP_Digest(issuerKey->data, issuerKey->length, md, &i, dgst, NULL)) 139 goto err; 140 141 if (!(ASN1_OCTET_STRING_set(cid->issuerKeyHash, md, i))) 142 goto err; 143 144 if (serialNumber) { 145 ASN1_INTEGER_free(cid->serialNumber); 146 if (!(cid->serialNumber = ASN1_INTEGER_dup(serialNumber))) 147 goto err; 148 } 149 return cid; 150 151 digerr: 152 OCSPerror(OCSP_R_DIGEST_ERR); 153 err: 154 if (cid) 155 OCSP_CERTID_free(cid); 156 return NULL; 157 } 158 LCRYPTO_ALIAS(OCSP_cert_id_new); 159 160 int 161 OCSP_id_issuer_cmp(OCSP_CERTID *a, OCSP_CERTID *b) 162 { 163 int ret; 164 165 ret = OBJ_cmp(a->hashAlgorithm->algorithm, b->hashAlgorithm->algorithm); 166 if (ret) 167 return ret; 168 ret = ASN1_OCTET_STRING_cmp(a->issuerNameHash, b->issuerNameHash); 169 if (ret) 170 return ret; 171 return ASN1_OCTET_STRING_cmp(a->issuerKeyHash, b->issuerKeyHash); 172 } 173 LCRYPTO_ALIAS(OCSP_id_issuer_cmp); 174 175 int 176 OCSP_id_cmp(OCSP_CERTID *a, OCSP_CERTID *b) 177 { 178 int ret; 179 180 ret = OCSP_id_issuer_cmp(a, b); 181 if (ret) 182 return ret; 183 return ASN1_INTEGER_cmp(a->serialNumber, b->serialNumber); 184 } 185 LCRYPTO_ALIAS(OCSP_id_cmp); 186 187 /* Parse a URL and split it up into host, port and path components and whether 188 * it is SSL. 189 */ 190 int 191 OCSP_parse_url(const char *url, char **phost, char **pport, char **ppath, 192 int *pssl) 193 { 194 char *host, *path, *port, *tmp; 195 196 *phost = *pport = *ppath = NULL; 197 *pssl = 0; 198 199 if (strncmp(url, "https://", 8) == 0) { 200 *pssl = 1; 201 host = strdup(url + 8); 202 } else if (strncmp(url, "http://", 7) == 0) 203 host = strdup(url + 7); 204 else { 205 OCSPerror(OCSP_R_ERROR_PARSING_URL); 206 return 0; 207 } 208 if (host == NULL) { 209 OCSPerror(ERR_R_MALLOC_FAILURE); 210 return 0; 211 } 212 213 if ((tmp = strchr(host, '/')) != NULL) { 214 path = strdup(tmp); 215 *tmp = '\0'; 216 } else 217 path = strdup("/"); 218 219 if ((tmp = strchr(host, ':')) != NULL ) { 220 port = strdup(tmp + 1); 221 *tmp = '\0'; 222 } else { 223 if (*pssl) 224 port = strdup("443"); 225 else 226 port = strdup("80"); 227 } 228 229 if (path == NULL || port == NULL) { 230 free(host); 231 free(path); 232 free(port); 233 OCSPerror(ERR_R_MALLOC_FAILURE); 234 return 0; 235 } 236 237 *phost = host; 238 *ppath = path; 239 *pport = port; 240 return 1; 241 } 242 LCRYPTO_ALIAS(OCSP_parse_url); 243 244 OCSP_CERTID * 245 OCSP_CERTID_dup(OCSP_CERTID *x) 246 { 247 return ASN1_item_dup(&OCSP_CERTID_it, x); 248 } 249 LCRYPTO_ALIAS(OCSP_CERTID_dup); 250