crypto/ocsp/ocsp_lib.c

   1 /* ocsp_lib.c */
   2 /*
   3  * Written by Tom Titchener <Tom_Titchener@groove.net> for the OpenSSL
   4  * project.
   5  */
   6
   7 /*
   8  * History: This file was transfered to Richard Levitte from CertCo by Kathy
   9  * Weinhold in mid-spring 2000 to be included in OpenSSL or released as a
  10  * patch kit.
  11  */
  12
  13 /* ====================================================================
  14  * Copyright (c) 1998-2000 The OpenSSL Project.  All rights reserved.
  15  *
  16  * Redistribution and use in source and binary forms, with or without
  17  * modification, are permitted provided that the following conditions
  18  * are met:
  19  *
  20  * 1. Redistributions of source code must retain the above copyright
  21  *    notice, this list of conditions and the following disclaimer.
  22  *
  23  * 2. Redistributions in binary form must reproduce the above copyright
  24  *    notice, this list of conditions and the following disclaimer in
  25  *    the documentation and/or other materials provided with the
  26  *    distribution.
  27  *
  28  * 3. All advertising materials mentioning features or use of this
  29  *    software must display the following acknowledgment:
  30  *    "This product includes software developed by the OpenSSL Project
  31  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  32  *
  33  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  34  *    endorse or promote products derived from this software without
  35  *    prior written permission. For written permission, please contact
  36  *    openssl-core@openssl.org.
  37  *
  38  * 5. Products derived from this software may not be called "OpenSSL"
  39  *    nor may "OpenSSL" appear in their names without prior written
  40  *    permission of the OpenSSL Project.
  41  *
  42  * 6. Redistributions of any form whatsoever must retain the following
  43  *    acknowledgment:
  44  *    "This product includes software developed by the OpenSSL Project
  45  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  46  *
  47  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  48  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  49  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  50  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  51  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  52  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  53  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  54  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  56  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  57  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  58  * OF THE POSSIBILITY OF SUCH DAMAGE.
  59  * ====================================================================
  60  *
  61  * This product includes cryptographic software written by Eric Young
  62  * (eay@cryptsoft.com).  This product includes software written by Tim
  63  * Hudson (tjh@cryptsoft.com).
  64  *
  65  */
  66
  67 #include <stdio.h>
  68 #include <cryptlib.h>
  69 #include <openssl/objects.h>
  70 #include <openssl/rand.h>
  71 #include <openssl/x509.h>
  72 #include <openssl/pem.h>
  73 #include <openssl/x509v3.h>
  74 #include <openssl/ocsp.h>
  75 #include "ocsp_lcl.h"
  76 #include <openssl/asn1t.h>
  77
  78 /* Convert a certificate and its issuer to an OCSP_CERTID */
  79
  80 OCSP_CERTID *OCSP_cert_to_id(const EVP_MD *dgst, X509 *subject, X509 *issuer)
  81 {
  82     X509_NAME *iname;
  83     ASN1_INTEGER *serial;
  84     ASN1_BIT_STRING *ikey;
  85     if (!dgst)
  86         dgst = EVP_sha1();
  87     if (subject) {
  88         iname = X509_get_issuer_name(subject);
  89         serial = X509_get_serialNumber(subject);
  90     } else {
  91         iname = X509_get_subject_name(issuer);
  92         serial = NULL;
  93     }
  94     ikey = X509_get0_pubkey_bitstr(issuer);
  95     return OCSP_cert_id_new(dgst, iname, ikey, serial);
  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()))
 110         goto err;
 111
 112     alg = cid->hashAlgorithm;
 113     ASN1_OBJECT_free(alg->algorithm);
 114     if ((nid = EVP_MD_type(dgst)) == NID_undef) {
 115         OCSPerr(OCSP_F_OCSP_CERT_ID_NEW, OCSP_R_UNKNOWN_NID);
 116         goto err;
 117     }
 118     if (!(alg->algorithm = OBJ_nid2obj(nid)))
 119         goto err;
 120     if ((alg->parameter = ASN1_TYPE_new()) == NULL)
 121         goto err;
 122     alg->parameter->type = V_ASN1_NULL;
 123
 124     if (!X509_NAME_digest(issuerName, dgst, md, &i))
 125         goto digerr;
 126     if (!(ASN1_OCTET_STRING_set(cid->issuerNameHash, md, i)))
 127         goto err;
 128
 129     /* Calculate the issuerKey hash, excluding tag and length */
 130     if (!EVP_Digest(issuerKey->data, issuerKey->length, md, &i, dgst, NULL))
 131         goto err;
 132
 133     if (!(ASN1_OCTET_STRING_set(cid->issuerKeyHash, md, i)))
 134         goto err;
 135
 136     if (serialNumber) {
 137         ASN1_INTEGER_free(cid->serialNumber);
 138         if (!(cid->serialNumber = ASN1_INTEGER_dup(serialNumber)))
 139             goto err;
 140     }
 141     return cid;
 142  digerr:
 143     OCSPerr(OCSP_F_OCSP_CERT_ID_NEW, OCSP_R_DIGEST_ERR);
 144  err:
 145     if (cid)
 146         OCSP_CERTID_free(cid);
 147     return NULL;
 148 }
 149
 150 int OCSP_id_issuer_cmp(OCSP_CERTID *a, OCSP_CERTID *b)
 151 {
 152     int ret;
 153     ret = OBJ_cmp(a->hashAlgorithm->algorithm, b->hashAlgorithm->algorithm);
 154     if (ret)
 155         return ret;
 156     ret = ASN1_OCTET_STRING_cmp(a->issuerNameHash, b->issuerNameHash);
 157     if (ret)
 158         return ret;
 159     return ASN1_OCTET_STRING_cmp(a->issuerKeyHash, b->issuerKeyHash);
 160 }
 161
 162 int OCSP_id_cmp(OCSP_CERTID *a, OCSP_CERTID *b)
 163 {
 164     int ret;
 165     ret = OCSP_id_issuer_cmp(a, b);
 166     if (ret)
 167         return ret;
 168     return ASN1_INTEGER_cmp(a->serialNumber, b->serialNumber);
 169 }
 170
 171 /*
 172  * Parse a URL and split it up into host, port and path components and
 173  * whether it is SSL.
 174  */
 175
 176 int OCSP_parse_url(const char *url, char **phost, char **pport, char **ppath,
 177                    int *pssl)
 178 {
 179     char *p, *buf;
 180
 181     char *host, *port;
 182
 183     *phost = NULL;
 184     *pport = NULL;
 185     *ppath = NULL;
 186
 187     /* dup the buffer since we are going to mess with it */
 188     buf = BUF_strdup(url);
 189     if (!buf)
 190         goto mem_err;
 191
 192     /* Check for initial colon */
 193     p = strchr(buf, ':');
 194
 195     if (!p)
 196         goto parse_err;
 197
 198     *(p++) = '\0';
 199
 200     if (!strcmp(buf, "http")) {
 201         *pssl = 0;
 202         port = "80";
 203     } else if (!strcmp(buf, "https")) {
 204         *pssl = 1;
 205         port = "443";
 206     } else
 207         goto parse_err;
 208
 209     /* Check for double slash */
 210     if ((p[0] != '/') || (p[1] != '/'))
 211         goto parse_err;
 212
 213     p += 2;
 214
 215     host = p;
 216
 217     /* Check for trailing part of path */
 218
 219     p = strchr(p, '/');
 220
 221     if (!p)
 222         *ppath = BUF_strdup("/");
 223     else {
 224         *ppath = BUF_strdup(p);
 225         /* Set start of path to 0 so hostname is valid */
 226         *p = '\0';
 227     }
 228
 229     if (!*ppath)
 230         goto mem_err;
 231
 232     p = host;
 233     if (host[0] == '[') {
 234         /* ipv6 literal */
 235         host++;
 236         p = strchr(host, ']');
 237         if (!p)
 238             goto parse_err;
 239         *p = '\0';
 240         p++;
 241     }
 242
 243     /* Look for optional ':' for port number */
 244     if ((p = strchr(p, ':'))) {
 245         *p = 0;
 246         port = p + 1;
 247     } else {
 248         /* Not found: set default port */
 249         if (*pssl)
 250             port = "443";
 251         else
 252             port = "80";
 253     }
 254
 255     *pport = BUF_strdup(port);
 256     if (!*pport)
 257         goto mem_err;
 258
 259     *phost = BUF_strdup(host);
 260
 261     if (!*phost)
 262         goto mem_err;
 263
 264     OPENSSL_free(buf);
 265
 266     return 1;
 267
 268  mem_err:
 269     OCSPerr(OCSP_F_OCSP_PARSE_URL, ERR_R_MALLOC_FAILURE);
 270     goto err;
 271
 272  parse_err:
 273     OCSPerr(OCSP_F_OCSP_PARSE_URL, OCSP_R_ERROR_PARSING_URL);
 274
 275  err:
 276     if (buf)
 277         OPENSSL_free(buf);
 278     if (*ppath)
 279         OPENSSL_free(*ppath);
 280     if (*pport)
 281         OPENSSL_free(*pport);
 282     if (*phost)
 283         OPENSSL_free(*phost);
 284     return 0;
 285
 286 }
 287
 288 IMPLEMENT_ASN1_DUP_FUNCTION(OCSP_CERTID)