1 /* ocsp_lib.c */ 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 <cryptlib.h> 66 #include <openssl/objects.h> 67 #include <openssl/rand.h> 68 #include <openssl/x509.h> 69 #include <openssl/pem.h> 70 #include <openssl/x509v3.h> 71 #include <openssl/ocsp.h> 72 73 /* Convert a certificate and its issuer to an OCSP_CERTID */ 74 75 OCSP_CERTID *OCSP_cert_to_id(const EVP_MD *dgst, X509 *subject, X509 *issuer) 76 { 77 X509_NAME *iname; 78 ASN1_INTEGER *serial; 79 ASN1_BIT_STRING *ikey; 80 #ifndef OPENSSL_NO_SHA1 81 if(!dgst) dgst = EVP_sha1(); 82 #endif 83 if (subject) 84 { 85 iname = X509_get_issuer_name(subject); 86 serial = X509_get_serialNumber(subject); 87 } 88 else 89 { 90 iname = X509_get_subject_name(issuer); 91 serial = NULL; 92 } 93 ikey = X509_get0_pubkey_bitstr(issuer); 94 return OCSP_cert_id_new(dgst, iname, ikey, serial); 95 } 96 97 98 OCSP_CERTID *OCSP_cert_id_new(const EVP_MD *dgst, 99 X509_NAME *issuerName, 100 ASN1_BIT_STRING* issuerKey, 101 ASN1_INTEGER *serialNumber) 102 { 103 int nid; 104 unsigned int i; 105 X509_ALGOR *alg; 106 OCSP_CERTID *cid = NULL; 107 unsigned char md[EVP_MAX_MD_SIZE]; 108 109 if (!(cid = OCSP_CERTID_new())) goto err; 110 111 alg = cid->hashAlgorithm; 112 if (alg->algorithm != NULL) ASN1_OBJECT_free(alg->algorithm); 113 if ((nid = EVP_MD_type(dgst)) == NID_undef) 114 { 115 OCSPerr(OCSP_F_OCSP_CERT_ID_NEW,OCSP_R_UNKNOWN_NID); 116 goto err; 117 } 118 if (!(alg->algorithm=OBJ_nid2obj(nid))) goto err; 119 if ((alg->parameter=ASN1_TYPE_new()) == NULL) goto err; 120 alg->parameter->type=V_ASN1_NULL; 121 122 if (!X509_NAME_digest(issuerName, dgst, md, &i)) goto digerr; 123 if (!(ASN1_OCTET_STRING_set(cid->issuerNameHash, md, i))) goto err; 124 125 /* Calculate the issuerKey hash, excluding tag and length */ 126 EVP_Digest(issuerKey->data, issuerKey->length, md, &i, dgst, NULL); 127 128 if (!(ASN1_OCTET_STRING_set(cid->issuerKeyHash, md, i))) goto err; 129 130 if (serialNumber) 131 { 132 ASN1_INTEGER_free(cid->serialNumber); 133 if (!(cid->serialNumber = ASN1_INTEGER_dup(serialNumber))) goto err; 134 } 135 return cid; 136 digerr: 137 OCSPerr(OCSP_F_OCSP_CERT_ID_NEW,OCSP_R_DIGEST_ERR); 138 err: 139 if (cid) OCSP_CERTID_free(cid); 140 return NULL; 141 } 142 143 int OCSP_id_issuer_cmp(OCSP_CERTID *a, OCSP_CERTID *b) 144 { 145 int ret; 146 ret = OBJ_cmp(a->hashAlgorithm->algorithm, b->hashAlgorithm->algorithm); 147 if (ret) return ret; 148 ret = ASN1_OCTET_STRING_cmp(a->issuerNameHash, b->issuerNameHash); 149 if (ret) return ret; 150 return ASN1_OCTET_STRING_cmp(a->issuerKeyHash, b->issuerKeyHash); 151 } 152 153 int OCSP_id_cmp(OCSP_CERTID *a, OCSP_CERTID *b) 154 { 155 int ret; 156 ret = OCSP_id_issuer_cmp(a, b); 157 if (ret) return ret; 158 return ASN1_INTEGER_cmp(a->serialNumber, b->serialNumber); 159 } 160 161 162 /* Parse a URL and split it up into host, port and path components and whether 163 * it is SSL. 164 */ 165 166 int OCSP_parse_url(char *url, char **phost, char **pport, char **ppath, int *pssl) 167 { 168 char *p, *buf; 169 170 char *host, *port; 171 172 /* dup the buffer since we are going to mess with it */ 173 buf = BUF_strdup(url); 174 if (!buf) goto mem_err; 175 176 *phost = NULL; 177 *pport = NULL; 178 *ppath = NULL; 179 180 /* Check for initial colon */ 181 p = strchr(buf, ':'); 182 183 if (!p) goto parse_err; 184 185 *(p++) = '\0'; 186 187 if (!strcmp(buf, "http")) 188 { 189 *pssl = 0; 190 port = "80"; 191 } 192 else if (!strcmp(buf, "https")) 193 { 194 *pssl = 1; 195 port = "443"; 196 } 197 else 198 goto parse_err; 199 200 /* Check for double slash */ 201 if ((p[0] != '/') || (p[1] != '/')) 202 goto parse_err; 203 204 p += 2; 205 206 host = p; 207 208 /* Check for trailing part of path */ 209 210 p = strchr(p, '/'); 211 212 if (!p) 213 *ppath = BUF_strdup("/"); 214 else 215 { 216 *ppath = BUF_strdup(p); 217 /* Set start of path to 0 so hostname is valid */ 218 *p = '\0'; 219 } 220 221 if (!*ppath) goto mem_err; 222 223 /* Look for optional ':' for port number */ 224 if ((p = strchr(host, ':'))) 225 { 226 *p = 0; 227 port = p + 1; 228 } 229 else 230 { 231 /* Not found: set default port */ 232 if (*pssl) port = "443"; 233 else port = "80"; 234 } 235 236 *pport = BUF_strdup(port); 237 if (!*pport) goto mem_err; 238 239 *phost = BUF_strdup(host); 240 241 if (!*phost) goto mem_err; 242 243 OPENSSL_free(buf); 244 245 return 1; 246 247 mem_err: 248 OCSPerr(OCSP_F_OCSP_PARSE_URL, ERR_R_MALLOC_FAILURE); 249 goto err; 250 251 parse_err: 252 OCSPerr(OCSP_F_OCSP_PARSE_URL, OCSP_R_ERROR_PARSING_URL); 253 254 255 err: 256 if (buf) OPENSSL_free(buf); 257 if (*ppath) OPENSSL_free(*ppath); 258 if (*pport) OPENSSL_free(*pport); 259 if (*phost) OPENSSL_free(*phost); 260 return 0; 261 262 } 263