lib/libcrypto/ocsp/ocsp_lib.c

   1 /* $OpenBSD: ocsp_lib.c,v 1.23 2018/08/24 20:03:21 tb 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 <stdio.h>
  65 #include <string.h>
  66
  67 #include <openssl/opensslconf.h>
  68
  69 #include <openssl/asn1t.h>
  70 #include <openssl/err.h>
  71 #include <openssl/objects.h>
  72 #include <openssl/ocsp.h>
  73 #include <openssl/pem.h>
  74 #include <openssl/x509.h>
  75 #include <openssl/x509v3.h>
  76
  77 /* Convert a certificate and its issuer to an OCSP_CERTID */
  78
  79 OCSP_CERTID *
  80 OCSP_cert_to_id(const EVP_MD *dgst, const X509 *subject, const X509 *issuer)
  81 {
  82         X509_NAME *iname;
  83         const ASN1_INTEGER *serial;
  84         ASN1_BIT_STRING *ikey;
  85
  86 #ifndef OPENSSL_NO_SHA1
  87         if (!dgst)
  88                 dgst = EVP_sha1();
  89 #endif
  90         if (subject) {
  91                 iname = X509_get_issuer_name(subject);
  92                 serial = X509_get0_serialNumber(subject);
  93         } else {
  94                 iname = X509_get_subject_name(issuer);
  95                 serial = NULL;
  96         }
  97         ikey = X509_get0_pubkey_bitstr(issuer);
  98         return OCSP_cert_id_new(dgst, iname, ikey, serial);
  99 }
 100
 101 OCSP_CERTID *
 102 OCSP_cert_id_new(const EVP_MD *dgst, const X509_NAME *issuerName,
 103     const ASN1_BIT_STRING *issuerKey, const ASN1_INTEGER *serialNumber)
 104 {
 105         int nid;
 106         unsigned int i;
 107         X509_ALGOR *alg;
 108         OCSP_CERTID *cid = NULL;
 109         unsigned char md[EVP_MAX_MD_SIZE];
 110
 111         if (!(cid = OCSP_CERTID_new()))
 112                 goto err;
 113
 114         alg = cid->hashAlgorithm;
 115         if (alg->algorithm != NULL)
 116                 ASN1_OBJECT_free(alg->algorithm);
 117         if ((nid = EVP_MD_type(dgst)) == NID_undef) {
 118                 OCSPerror(OCSP_R_UNKNOWN_NID);
 119                 goto err;
 120         }
 121         if (!(alg->algorithm = OBJ_nid2obj(nid)))
 122                 goto err;
 123         if ((alg->parameter = ASN1_TYPE_new()) == NULL)
 124                 goto err;
 125         alg->parameter->type = V_ASN1_NULL;
 126
 127         if (!X509_NAME_digest(issuerName, dgst, md, &i))
 128                 goto digerr;
 129         if (!(ASN1_OCTET_STRING_set(cid->issuerNameHash, md, i)))
 130                 goto err;
 131
 132         /* Calculate the issuerKey hash, excluding tag and length */
 133         if (!EVP_Digest(issuerKey->data, issuerKey->length, md, &i, dgst, NULL))
 134                 goto err;
 135
 136         if (!(ASN1_OCTET_STRING_set(cid->issuerKeyHash, md, i)))
 137                 goto err;
 138
 139         if (serialNumber) {
 140                 ASN1_INTEGER_free(cid->serialNumber);
 141                 if (!(cid->serialNumber = ASN1_INTEGER_dup(serialNumber)))
 142                         goto err;
 143         }
 144         return cid;
 145
 146 digerr:
 147         OCSPerror(OCSP_R_DIGEST_ERR);
 148 err:
 149         if (cid)
 150                 OCSP_CERTID_free(cid);
 151         return NULL;
 152 }
 153
 154 int
 155 OCSP_id_issuer_cmp(OCSP_CERTID *a, OCSP_CERTID *b)
 156 {
 157         int ret;
 158
 159         ret = OBJ_cmp(a->hashAlgorithm->algorithm, b->hashAlgorithm->algorithm);
 160         if (ret)
 161                 return ret;
 162         ret = ASN1_OCTET_STRING_cmp(a->issuerNameHash, b->issuerNameHash);
 163         if (ret)
 164                 return ret;
 165         return ASN1_OCTET_STRING_cmp(a->issuerKeyHash, b->issuerKeyHash);
 166 }
 167
 168 int
 169 OCSP_id_cmp(OCSP_CERTID *a, OCSP_CERTID *b)
 170 {
 171         int ret;
 172
 173         ret = OCSP_id_issuer_cmp(a, b);
 174         if (ret)
 175                 return ret;
 176         return ASN1_INTEGER_cmp(a->serialNumber, b->serialNumber);
 177 }
 178
 179 /* Parse a URL and split it up into host, port and path components and whether
 180  * it is SSL.
 181  */
 182 int
 183 OCSP_parse_url(const char *url, char **phost, char **pport, char **ppath,
 184     int *pssl)
 185 {
 186         char *host, *path, *port, *tmp;
 187
 188         *phost = *pport = *ppath = NULL;
 189         *pssl = 0;
 190
 191         if (strncmp(url, "https://", 8) == 0) {
 192                 *pssl = 1;
 193                 host = strdup(url + 8);
 194         } else if (strncmp(url, "http://", 7) == 0)
 195                 host = strdup(url + 7);
 196         else {
 197                 OCSPerror(OCSP_R_ERROR_PARSING_URL);
 198                 return 0;
 199         }
 200         if (host == NULL) {
 201                 OCSPerror(ERR_R_MALLOC_FAILURE);
 202                 return 0;
 203         }
 204
 205         if ((tmp = strchr(host, '/')) != NULL) {
 206                 path = strdup(tmp);
 207                 *tmp = '\0';
 208         } else
 209                 path = strdup("/");
 210
 211         if ((tmp = strchr(host, ':')) != NULL ) {
 212                 port = strdup(tmp + 1);
 213                 *tmp = '\0';
 214         } else {
 215                 if (*pssl)
 216                         port = strdup("443");
 217                 else
 218                         port = strdup("80");
 219         }
 220
 221         if (path == NULL || port == NULL) {
 222                 free(host);
 223                 free(path);
 224                 free(port);
 225                 OCSPerror(ERR_R_MALLOC_FAILURE);
 226                 return 0;
 227         }
 228
 229         *phost = host;
 230         *ppath = path;
 231         *pport = port;
 232         return 1;
 233 }
 234
 235 OCSP_CERTID *
 236 OCSP_CERTID_dup(OCSP_CERTID *x)
 237 {
 238         return ASN1_item_dup(&OCSP_CERTID_it, x);
 239 }