ocsp_lib.c revision 1.12
1/* $OpenBSD: ocsp_lib.c,v 1.12 2014/07/10 13:58:23 jsing 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 <cryptlib.h> 65#include <stdio.h> 66#include <string.h> 67 68#include <openssl/objects.h> 69#include <openssl/rand.h> 70#include <openssl/x509.h> 71#include <openssl/pem.h> 72#include <openssl/x509v3.h> 73#include <openssl/ocsp.h> 74#include <openssl/asn1t.h> 75 76/* Convert a certificate and its issuer to an OCSP_CERTID */ 77 78OCSP_CERTID * 79OCSP_cert_to_id(const EVP_MD *dgst, X509 *subject, X509 *issuer) 80{ 81 X509_NAME *iname; 82 ASN1_INTEGER *serial; 83 ASN1_BIT_STRING *ikey; 84 85#ifndef OPENSSL_NO_SHA1 86 if (!dgst) 87 dgst = EVP_sha1(); 88#endif 89 if (subject) { 90 iname = X509_get_issuer_name(subject); 91 serial = X509_get_serialNumber(subject); 92 } else { 93 iname = X509_get_subject_name(issuer); 94 serial = NULL; 95 } 96 ikey = X509_get0_pubkey_bitstr(issuer); 97 return OCSP_cert_id_new(dgst, iname, ikey, serial); 98} 99 100OCSP_CERTID * 101OCSP_cert_id_new(const EVP_MD *dgst, X509_NAME *issuerName, 102 ASN1_BIT_STRING* issuerKey, ASN1_INTEGER *serialNumber) 103{ 104 int nid; 105 unsigned int i; 106 X509_ALGOR *alg; 107 OCSP_CERTID *cid = NULL; 108 unsigned char md[EVP_MAX_MD_SIZE]; 109 110 if (!(cid = OCSP_CERTID_new())) 111 goto err; 112 113 alg = cid->hashAlgorithm; 114 if (alg->algorithm != NULL) 115 ASN1_OBJECT_free(alg->algorithm); 116 if ((nid = EVP_MD_type(dgst)) == NID_undef) { 117 OCSPerr(OCSP_F_OCSP_CERT_ID_NEW, OCSP_R_UNKNOWN_NID); 118 goto err; 119 } 120 if (!(alg->algorithm = OBJ_nid2obj(nid))) 121 goto err; 122 if ((alg->parameter = ASN1_TYPE_new()) == NULL) 123 goto err; 124 alg->parameter->type = V_ASN1_NULL; 125 126 if (!X509_NAME_digest(issuerName, dgst, md, &i)) 127 goto digerr; 128 if (!(ASN1_OCTET_STRING_set(cid->issuerNameHash, md, i))) 129 goto err; 130 131 /* Calculate the issuerKey hash, excluding tag and length */ 132 if (!EVP_Digest(issuerKey->data, issuerKey->length, md, &i, dgst, NULL)) 133 goto err; 134 135 if (!(ASN1_OCTET_STRING_set(cid->issuerKeyHash, md, i))) 136 goto err; 137 138 if (serialNumber) { 139 ASN1_INTEGER_free(cid->serialNumber); 140 if (!(cid->serialNumber = ASN1_INTEGER_dup(serialNumber))) 141 goto err; 142 } 143 return cid; 144 145digerr: 146 OCSPerr(OCSP_F_OCSP_CERT_ID_NEW, OCSP_R_DIGEST_ERR); 147err: 148 if (cid) 149 OCSP_CERTID_free(cid); 150 return NULL; 151} 152 153int 154OCSP_id_issuer_cmp(OCSP_CERTID *a, OCSP_CERTID *b) 155{ 156 int ret; 157 158 ret = OBJ_cmp(a->hashAlgorithm->algorithm, b->hashAlgorithm->algorithm); 159 if (ret) 160 return ret; 161 ret = ASN1_OCTET_STRING_cmp(a->issuerNameHash, b->issuerNameHash); 162 if (ret) 163 return ret; 164 return ASN1_OCTET_STRING_cmp(a->issuerKeyHash, b->issuerKeyHash); 165} 166 167int 168OCSP_id_cmp(OCSP_CERTID *a, OCSP_CERTID *b) 169{ 170 int ret; 171 172 ret = OCSP_id_issuer_cmp(a, b); 173 if (ret) 174 return ret; 175 return ASN1_INTEGER_cmp(a->serialNumber, b->serialNumber); 176} 177 178/* Parse a URL and split it up into host, port and path components and whether 179 * it is SSL. 180 */ 181int 182OCSP_parse_url(char *url, char **phost, char **pport, char **ppath, int *pssl) 183{ 184 char *p, *buf; 185 char *host, *port; 186 187 *phost = NULL; 188 *pport = NULL; 189 *ppath = NULL; 190 191 /* dup the buffer since we are going to mess with it */ 192 buf = BUF_strdup(url); 193 if (!buf) 194 goto mem_err; 195 196 /* Check for initial colon */ 197 p = strchr(buf, ':'); 198 if (!p) 199 goto parse_err; 200 201 *(p++) = '\0'; 202 203 if (!strcmp(buf, "http")) { 204 *pssl = 0; 205 port = "80"; 206 } else if (!strcmp(buf, "https")) { 207 *pssl = 1; 208 port = "443"; 209 } else 210 goto parse_err; 211 212 /* Check for double slash */ 213 if ((p[0] != '/') || (p[1] != '/')) 214 goto parse_err; 215 216 p += 2; 217 218 host = p; 219 220 /* Check for trailing part of path */ 221 p = strchr(p, '/'); 222 if (!p) 223 *ppath = BUF_strdup("/"); 224 else { 225 *ppath = BUF_strdup(p); 226 /* Set start of path to 0 so hostname is valid */ 227 *p = '\0'; 228 } 229 230 if (!*ppath) 231 goto mem_err; 232 233 /* Look for optional ':' for port number */ 234 if ((p = strchr(host, ':'))) { 235 *p = 0; 236 port = p + 1; 237 } else { 238 /* Not found: set default port */ 239 if (*pssl) 240 port = "443"; 241 else 242 port = "80"; 243 } 244 245 *pport = BUF_strdup(port); 246 if (!*pport) 247 goto mem_err; 248 249 *phost = BUF_strdup(host); 250 251 if (!*phost) 252 goto mem_err; 253 254 free(buf); 255 256 return 1; 257 258mem_err: 259 OCSPerr(OCSP_F_OCSP_PARSE_URL, ERR_R_MALLOC_FAILURE); 260 goto err; 261 262parse_err: 263 OCSPerr(OCSP_F_OCSP_PARSE_URL, OCSP_R_ERROR_PARSING_URL); 264 265err: 266 free(buf); 267 free(*ppath); 268 free(*pport); 269 free(*phost); 270 *phost = NULL; 271 *pport = NULL; 272 *ppath = NULL; 273 return 0; 274} 275 276IMPLEMENT_ASN1_DUP_FUNCTION(OCSP_CERTID) 277