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 "internal/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()) == NULL)
 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)) == NULL)
 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         if (ASN1_STRING_copy(&cid->serialNumber, serialNumber) == 0)
 138             goto err;
 139     }
 140     return cid;
 141  digerr:
 142     OCSPerr(OCSP_F_OCSP_CERT_ID_NEW, OCSP_R_DIGEST_ERR);
 143  err:
 144     OCSP_CERTID_free(cid);
 145     return NULL;
 146 }
 147
 148 int OCSP_id_issuer_cmp(OCSP_CERTID *a, OCSP_CERTID *b)
 149 {
 150     int ret;
 151     ret = OBJ_cmp(a->hashAlgorithm.algorithm, b->hashAlgorithm.algorithm);
 152     if (ret)
 153         return ret;
 154     ret = ASN1_OCTET_STRING_cmp(&a->issuerNameHash, &b->issuerNameHash);
 155     if (ret)
 156         return ret;
 157     return ASN1_OCTET_STRING_cmp(&a->issuerKeyHash, &b->issuerKeyHash);
 158 }
 159
 160 int OCSP_id_cmp(OCSP_CERTID *a, OCSP_CERTID *b)
 161 {
 162     int ret;
 163     ret = OCSP_id_issuer_cmp(a, b);
 164     if (ret)
 165         return ret;
 166     return ASN1_INTEGER_cmp(&a->serialNumber, &b->serialNumber);
 167 }
 168
 169 /*
 170  * Parse a URL and split it up into host, port and path components and
 171  * whether it is SSL.
 172  */
 173
 174 int OCSP_parse_url(const char *url, char **phost, char **pport, char **ppath,
 175                    int *pssl)
 176 {
 177     char *p, *buf;
 178
 179     char *host, *port;
 180
 181     *phost = NULL;
 182     *pport = NULL;
 183     *ppath = NULL;
 184
 185     /* dup the buffer since we are going to mess with it */
 186     buf = OPENSSL_strdup(url);
 187     if (!buf)
 188         goto mem_err;
 189
 190     /* Check for initial colon */
 191     p = strchr(buf, ':');
 192
 193     if (!p)
 194         goto parse_err;
 195
 196     *(p++) = '\0';
 197
 198     if (strcmp(buf, "http") == 0) {
 199         *pssl = 0;
 200         port = "80";
 201     } else if (strcmp(buf, "https") == 0) {
 202         *pssl = 1;
 203         port = "443";
 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 = OPENSSL_strdup("/");
 221     else {
 222         *ppath = OPENSSL_strdup(p);
 223         /* Set start of path to 0 so hostname is valid */
 224         *p = '\0';
 225     }
 226
 227     if (!*ppath)
 228         goto mem_err;
 229
 230     p = host;
 231     if (host[0] == '[') {
 232         /* ipv6 literal */
 233         host++;
 234         p = strchr(host, ']');
 235         if (!p)
 236             goto parse_err;
 237         *p = '\0';
 238         p++;
 239     }
 240
 241     /* Look for optional ':' for port number */
 242     if ((p = strchr(p, ':'))) {
 243         *p = 0;
 244         port = p + 1;
 245     }
 246
 247     *pport = OPENSSL_strdup(port);
 248     if (!*pport)
 249         goto mem_err;
 250
 251     *phost = OPENSSL_strdup(host);
 252
 253     if (!*phost)
 254         goto mem_err;
 255
 256     OPENSSL_free(buf);
 257
 258     return 1;
 259
 260  mem_err:
 261     OCSPerr(OCSP_F_OCSP_PARSE_URL, ERR_R_MALLOC_FAILURE);
 262     goto err;
 263
 264  parse_err:
 265     OCSPerr(OCSP_F_OCSP_PARSE_URL, OCSP_R_ERROR_PARSING_URL);
 266
 267  err:
 268     OPENSSL_free(buf);
 269     OPENSSL_free(*ppath);
 270     OPENSSL_free(*pport);
 271     OPENSSL_free(*phost);
 272     return 0;
 273
 274 }
 275
 276 IMPLEMENT_ASN1_DUP_FUNCTION(OCSP_CERTID)