ocsp_lib.c revision 109998
1109998Smarkm/* ocsp_lib.c */ 2109998Smarkm/* Written by Tom Titchener <Tom_Titchener@groove.net> for the OpenSSL 3109998Smarkm * project. */ 4109998Smarkm 5109998Smarkm/* History: 6109998Smarkm This file was transfered to Richard Levitte from CertCo by Kathy 7109998Smarkm Weinhold in mid-spring 2000 to be included in OpenSSL or released 8109998Smarkm as a patch kit. */ 9109998Smarkm 10109998Smarkm/* ==================================================================== 11109998Smarkm * Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved. 12109998Smarkm * 13109998Smarkm * Redistribution and use in source and binary forms, with or without 14109998Smarkm * modification, are permitted provided that the following conditions 15109998Smarkm * are met: 16109998Smarkm * 17109998Smarkm * 1. Redistributions of source code must retain the above copyright 18109998Smarkm * notice, this list of conditions and the following disclaimer. 19109998Smarkm * 20109998Smarkm * 2. Redistributions in binary form must reproduce the above copyright 21109998Smarkm * notice, this list of conditions and the following disclaimer in 22109998Smarkm * the documentation and/or other materials provided with the 23109998Smarkm * distribution. 24109998Smarkm * 25109998Smarkm * 3. All advertising materials mentioning features or use of this 26109998Smarkm * software must display the following acknowledgment: 27109998Smarkm * "This product includes software developed by the OpenSSL Project 28109998Smarkm * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 29109998Smarkm * 30109998Smarkm * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 31109998Smarkm * endorse or promote products derived from this software without 32109998Smarkm * prior written permission. For written permission, please contact 33109998Smarkm * openssl-core@openssl.org. 34109998Smarkm * 35109998Smarkm * 5. Products derived from this software may not be called "OpenSSL" 36109998Smarkm * nor may "OpenSSL" appear in their names without prior written 37109998Smarkm * permission of the OpenSSL Project. 38109998Smarkm * 39109998Smarkm * 6. Redistributions of any form whatsoever must retain the following 40109998Smarkm * acknowledgment: 41109998Smarkm * "This product includes software developed by the OpenSSL Project 42109998Smarkm * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 43109998Smarkm * 44109998Smarkm * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 45109998Smarkm * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 46109998Smarkm * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 47109998Smarkm * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 48109998Smarkm * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 49109998Smarkm * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 50109998Smarkm * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 51109998Smarkm * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 52109998Smarkm * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 53109998Smarkm * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 54109998Smarkm * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 55109998Smarkm * OF THE POSSIBILITY OF SUCH DAMAGE. 56109998Smarkm * ==================================================================== 57109998Smarkm * 58109998Smarkm * This product includes cryptographic software written by Eric Young 59109998Smarkm * (eay@cryptsoft.com). This product includes software written by Tim 60109998Smarkm * Hudson (tjh@cryptsoft.com). 61109998Smarkm * 62109998Smarkm */ 63109998Smarkm 64109998Smarkm#include <stdio.h> 65109998Smarkm#include <cryptlib.h> 66109998Smarkm#include <openssl/objects.h> 67109998Smarkm#include <openssl/rand.h> 68109998Smarkm#include <openssl/x509.h> 69109998Smarkm#include <openssl/pem.h> 70109998Smarkm#include <openssl/x509v3.h> 71109998Smarkm#include <openssl/ocsp.h> 72109998Smarkm 73109998Smarkm/* Convert a certificate and its issuer to an OCSP_CERTID */ 74109998Smarkm 75109998SmarkmOCSP_CERTID *OCSP_cert_to_id(const EVP_MD *dgst, X509 *subject, X509 *issuer) 76109998Smarkm{ 77109998Smarkm X509_NAME *iname; 78109998Smarkm ASN1_INTEGER *serial; 79109998Smarkm ASN1_BIT_STRING *ikey; 80109998Smarkm#ifndef OPENSSL_NO_SHA1 81109998Smarkm if(!dgst) dgst = EVP_sha1(); 82109998Smarkm#endif 83109998Smarkm if (subject) 84109998Smarkm { 85109998Smarkm iname = X509_get_issuer_name(subject); 86109998Smarkm serial = X509_get_serialNumber(subject); 87109998Smarkm } 88109998Smarkm else 89109998Smarkm { 90109998Smarkm iname = X509_get_subject_name(issuer); 91109998Smarkm serial = NULL; 92109998Smarkm } 93109998Smarkm ikey = X509_get0_pubkey_bitstr(issuer); 94109998Smarkm return OCSP_cert_id_new(dgst, iname, ikey, serial); 95109998Smarkm} 96109998Smarkm 97109998Smarkm 98109998SmarkmOCSP_CERTID *OCSP_cert_id_new(const EVP_MD *dgst, 99109998Smarkm X509_NAME *issuerName, 100109998Smarkm ASN1_BIT_STRING* issuerKey, 101109998Smarkm ASN1_INTEGER *serialNumber) 102109998Smarkm { 103109998Smarkm int nid; 104109998Smarkm unsigned int i; 105109998Smarkm X509_ALGOR *alg; 106109998Smarkm OCSP_CERTID *cid = NULL; 107109998Smarkm unsigned char md[EVP_MAX_MD_SIZE]; 108109998Smarkm 109109998Smarkm if (!(cid = OCSP_CERTID_new())) goto err; 110109998Smarkm 111109998Smarkm alg = cid->hashAlgorithm; 112109998Smarkm if (alg->algorithm != NULL) ASN1_OBJECT_free(alg->algorithm); 113109998Smarkm if ((nid = EVP_MD_type(dgst)) == NID_undef) 114109998Smarkm { 115109998Smarkm OCSPerr(OCSP_F_CERT_ID_NEW,OCSP_R_UNKNOWN_NID); 116109998Smarkm goto err; 117109998Smarkm } 118109998Smarkm if (!(alg->algorithm=OBJ_nid2obj(nid))) goto err; 119109998Smarkm if ((alg->parameter=ASN1_TYPE_new()) == NULL) goto err; 120109998Smarkm alg->parameter->type=V_ASN1_NULL; 121109998Smarkm 122109998Smarkm if (!X509_NAME_digest(issuerName, dgst, md, &i)) goto digerr; 123109998Smarkm if (!(ASN1_OCTET_STRING_set(cid->issuerNameHash, md, i))) goto err; 124109998Smarkm 125109998Smarkm /* Calculate the issuerKey hash, excluding tag and length */ 126109998Smarkm EVP_Digest(issuerKey->data, issuerKey->length, md, &i, dgst, NULL); 127109998Smarkm 128109998Smarkm if (!(ASN1_OCTET_STRING_set(cid->issuerKeyHash, md, i))) goto err; 129109998Smarkm 130109998Smarkm if (serialNumber) 131109998Smarkm { 132109998Smarkm ASN1_INTEGER_free(cid->serialNumber); 133109998Smarkm if (!(cid->serialNumber = ASN1_INTEGER_dup(serialNumber))) goto err; 134109998Smarkm } 135109998Smarkm return cid; 136109998Smarkmdigerr: 137109998Smarkm OCSPerr(OCSP_F_CERT_ID_NEW,OCSP_R_DIGEST_ERR); 138109998Smarkmerr: 139109998Smarkm if (cid) OCSP_CERTID_free(cid); 140109998Smarkm return NULL; 141109998Smarkm } 142109998Smarkm 143109998Smarkmint OCSP_id_issuer_cmp(OCSP_CERTID *a, OCSP_CERTID *b) 144109998Smarkm { 145109998Smarkm int ret; 146109998Smarkm ret = OBJ_cmp(a->hashAlgorithm->algorithm, b->hashAlgorithm->algorithm); 147109998Smarkm if (ret) return ret; 148109998Smarkm ret = ASN1_OCTET_STRING_cmp(a->issuerNameHash, b->issuerNameHash); 149109998Smarkm if (ret) return ret; 150109998Smarkm return ASN1_OCTET_STRING_cmp(a->issuerKeyHash, b->issuerKeyHash); 151109998Smarkm } 152109998Smarkm 153109998Smarkmint OCSP_id_cmp(OCSP_CERTID *a, OCSP_CERTID *b) 154109998Smarkm { 155109998Smarkm int ret; 156109998Smarkm ret = OCSP_id_issuer_cmp(a, b); 157109998Smarkm if (ret) return ret; 158109998Smarkm return ASN1_INTEGER_cmp(a->serialNumber, b->serialNumber); 159109998Smarkm } 160109998Smarkm 161109998Smarkm 162109998Smarkm/* Parse a URL and split it up into host, port and path components and whether 163109998Smarkm * it is SSL. 164109998Smarkm */ 165109998Smarkm 166109998Smarkmint OCSP_parse_url(char *url, char **phost, char **pport, char **ppath, int *pssl) 167109998Smarkm { 168109998Smarkm char *p, *buf; 169109998Smarkm 170109998Smarkm char *host, *port; 171109998Smarkm 172109998Smarkm /* dup the buffer since we are going to mess with it */ 173109998Smarkm buf = BUF_strdup(url); 174109998Smarkm if (!buf) goto mem_err; 175109998Smarkm 176109998Smarkm *phost = NULL; 177109998Smarkm *pport = NULL; 178109998Smarkm *ppath = NULL; 179109998Smarkm 180109998Smarkm /* Check for initial colon */ 181109998Smarkm p = strchr(buf, ':'); 182109998Smarkm 183109998Smarkm if (!p) goto parse_err; 184109998Smarkm 185109998Smarkm *(p++) = '\0'; 186109998Smarkm 187109998Smarkm if (!strcmp(buf, "http")) 188109998Smarkm { 189109998Smarkm *pssl = 0; 190109998Smarkm port = "80"; 191109998Smarkm } 192109998Smarkm else if (!strcmp(buf, "https")) 193109998Smarkm { 194109998Smarkm *pssl = 1; 195109998Smarkm port = "443"; 196109998Smarkm } 197109998Smarkm else 198109998Smarkm goto parse_err; 199109998Smarkm 200109998Smarkm /* Check for double slash */ 201109998Smarkm if ((p[0] != '/') || (p[1] != '/')) 202109998Smarkm goto parse_err; 203109998Smarkm 204109998Smarkm p += 2; 205109998Smarkm 206109998Smarkm host = p; 207109998Smarkm 208109998Smarkm /* Check for trailing part of path */ 209109998Smarkm 210109998Smarkm p = strchr(p, '/'); 211109998Smarkm 212109998Smarkm if (!p) 213109998Smarkm *ppath = BUF_strdup("/"); 214109998Smarkm else 215109998Smarkm { 216109998Smarkm *ppath = BUF_strdup(p); 217109998Smarkm /* Set start of path to 0 so hostname is valid */ 218109998Smarkm *p = '\0'; 219109998Smarkm } 220109998Smarkm 221109998Smarkm if (!*ppath) goto mem_err; 222109998Smarkm 223109998Smarkm /* Look for optional ':' for port number */ 224109998Smarkm if ((p = strchr(host, ':'))) 225109998Smarkm { 226109998Smarkm *p = 0; 227109998Smarkm port = p + 1; 228109998Smarkm } 229109998Smarkm else 230109998Smarkm { 231109998Smarkm /* Not found: set default port */ 232109998Smarkm if (*pssl) port = "443"; 233109998Smarkm else port = "80"; 234109998Smarkm } 235109998Smarkm 236109998Smarkm *pport = BUF_strdup(port); 237109998Smarkm if (!*pport) goto mem_err; 238109998Smarkm 239109998Smarkm *phost = BUF_strdup(host); 240109998Smarkm 241109998Smarkm if (!*phost) goto mem_err; 242109998Smarkm 243109998Smarkm OPENSSL_free(buf); 244109998Smarkm 245109998Smarkm return 1; 246109998Smarkm 247109998Smarkm mem_err: 248109998Smarkm OCSPerr(OCSP_F_OCSP_PARSE_URL, ERR_R_MALLOC_FAILURE); 249109998Smarkm goto err; 250109998Smarkm 251109998Smarkm parse_err: 252109998Smarkm OCSPerr(OCSP_F_OCSP_PARSE_URL, OCSP_R_ERROR_PARSING_URL); 253109998Smarkm 254109998Smarkm 255109998Smarkm err: 256109998Smarkm if (*ppath) OPENSSL_free(*ppath); 257109998Smarkm if (*pport) OPENSSL_free(*pport); 258109998Smarkm if (*phost) OPENSSL_free(*phost); 259109998Smarkm return 0; 260109998Smarkm 261109998Smarkm } 262