crypto/ocsp/ocsp_lib.c

   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         iname = X509_get_issuer_name(subject);
  84         serial = X509_get_serialNumber(subject);
  85         ikey = X509_get0_pubkey_bitstr(issuer);
  86         return OCSP_cert_id_new(dgst, iname, ikey, serial);
  87 }
  88
  89
  90 OCSP_CERTID *OCSP_cert_id_new(const EVP_MD *dgst,
  91                               X509_NAME *issuerName,
  92                               ASN1_BIT_STRING* issuerKey,
  93                               ASN1_INTEGER *serialNumber)
  94         {
  95         int nid;
  96         unsigned int i;
  97         X509_ALGOR *alg;
  98         OCSP_CERTID *cid = NULL;
  99         unsigned char md[EVP_MAX_MD_SIZE];
 100
 101         if (!(cid = OCSP_CERTID_new())) goto err;
 102
 103         alg = cid->hashAlgorithm;
 104         if (alg->algorithm != NULL) ASN1_OBJECT_free(alg->algorithm);
 105         if ((nid = EVP_MD_type(dgst)) == NID_undef)
 106                 {
 107                 OCSPerr(OCSP_F_CERT_ID_NEW,OCSP_R_UNKNOWN_NID);
 108                 goto err;
 109                 }
 110         if (!(alg->algorithm=OBJ_nid2obj(nid))) goto err;
 111         if ((alg->parameter=ASN1_TYPE_new()) == NULL) goto err;
 112         alg->parameter->type=V_ASN1_NULL;
 113
 114         if (!X509_NAME_digest(issuerName, dgst, md, &i)) goto digerr;
 115         if (!(ASN1_OCTET_STRING_set(cid->issuerNameHash, md, i))) goto err;
 116
 117         /* Calculate the issuerKey hash, excluding tag and length */
 118         EVP_Digest(issuerKey->data, issuerKey->length, md, &i, dgst);
 119
 120         if (!(ASN1_OCTET_STRING_set(cid->issuerKeyHash, md, i))) goto err;
 121
 122         if (cid->serialNumber != NULL) ASN1_INTEGER_free(cid->serialNumber);
 123         if (!(cid->serialNumber = ASN1_INTEGER_dup(serialNumber))) goto err;
 124         return cid;
 125 digerr:
 126         OCSPerr(OCSP_F_CERT_ID_NEW,OCSP_R_DIGEST_ERR);
 127 err:
 128         if (cid) OCSP_CERTID_free(cid);
 129         return NULL;
 130         }
 131
 132 int OCSP_id_issuer_cmp(OCSP_CERTID *a, OCSP_CERTID *b)
 133         {
 134         int ret;
 135         ret = OBJ_cmp(a->hashAlgorithm->algorithm, b->hashAlgorithm->algorithm);
 136         if (ret) return ret;
 137         ret = ASN1_OCTET_STRING_cmp(a->issuerNameHash, b->issuerNameHash);
 138         if (ret) return ret;
 139         return ASN1_OCTET_STRING_cmp(a->issuerKeyHash, b->issuerKeyHash);
 140         }
 141
 142 int OCSP_id_cmp(OCSP_CERTID *a, OCSP_CERTID *b)
 143         {
 144         int ret;
 145         ret = OCSP_id_issuer_cmp(a, b);
 146         if (ret) return ret;
 147         return ASN1_INTEGER_cmp(a->serialNumber, b->serialNumber);
 148         }
 149
 150 /* XXX assumes certs in signature are sorted root to leaf XXX */
 151 int OCSP_request_verify(OCSP_REQUEST *req, EVP_PKEY *pkey)
 152         {
 153         STACK_OF(X509) *sk;
 154
 155         if (!req->optionalSignature) return 0;
 156         if (pkey == NULL)
 157                 {
 158                 if (!(sk = req->optionalSignature->certs)) return 0;
 159                 if (!(pkey=X509_get_pubkey(sk_X509_value(sk, sk_X509_num(sk)-1))))
 160                         {
 161                         OCSPerr(OCSP_F_REQUEST_VERIFY,OCSP_R_NO_PUBLIC_KEY);
 162                         return 0;
 163                         }
 164                 }
 165         return OCSP_REQUEST_verify(req, pkey);
 166         }
 167
 168
 169 /* Parse a URL and split it up into host, port and path components and whether
 170  * it is SSL.
 171  */
 172
 173 int OCSP_parse_url(char *url, char **phost, char **pport, char **ppath, int *pssl)
 174         {
 175         char *p, *buf;
 176
 177         char *host, *port;
 178
 179         /* dup the buffer since we are going to mess with it */
 180         buf = BUF_strdup(url);
 181         if (!buf) goto mem_err;
 182
 183         *phost = NULL;
 184         *pport = NULL;
 185         *ppath = NULL;
 186
 187         /* Check for initial colon */
 188         p = strchr(buf, ':');
 189
 190         if (!p) goto parse_err;
 191
 192         *(p++) = '\0';
 193
 194         if (!strcmp(buf, "http"))
 195                 {
 196                 *pssl = 0;
 197                 port = "80";
 198                 }
 199         else if (!strcmp(buf, "https"))
 200                 {
 201                 *pssl = 1;
 202                 port = "443";
 203                 }
 204         else
 205                 goto parse_err;
 206
 207         /* Check for double slash */
 208         if ((p[0] != '/') || (p[1] != '/'))
 209                 goto parse_err;
 210
 211         p += 2;
 212
 213         host = p;
 214
 215         /* Check for trailing part of path */
 216
 217         p = strchr(p, '/');
 218
 219         if (!p)
 220                 *ppath = BUF_strdup("/");
 221         else
 222                 {
 223                 *ppath = BUF_strdup(p);
 224                 /* Set start of path to 0 so hostname is valid */
 225                 *p = '\0';
 226                 }
 227
 228         if (!*ppath) goto mem_err;
 229
 230         /* Look for optional ':' for port number */
 231         if ((p = strchr(host, ':')))
 232                 {
 233                 *p = 0;
 234                 port = p + 1;
 235                 }
 236         else
 237                 {
 238                 /* Not found: set default port */
 239                 if (*pssl) port = "443";
 240                 else port = "80";
 241                 }
 242
 243         *pport = BUF_strdup(port);
 244         if (!*pport) goto mem_err;
 245
 246         *phost = BUF_strdup(host);
 247
 248         if (!*phost) goto mem_err;
 249
 250         OPENSSL_free(buf);
 251
 252         return 1;
 253
 254         mem_err:
 255         OCSPerr(OCSP_F_OCSP_PARSE_URL, ERR_R_MALLOC_FAILURE);
 256         goto err;
 257
 258         parse_err:
 259         OCSPerr(OCSP_F_OCSP_PARSE_URL, OCSP_R_ERROR_PARSING_URL);
 260
 261
 262         err:
 263         if (*ppath) OPENSSL_free(*ppath);
 264         if (*pport) OPENSSL_free(*pport);
 265         if (*phost) OPENSSL_free(*phost);
 266         return 0;
 267
 268         }