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ocsp_srv.c

/* ocsp_srv.c */
/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
 * project 2001.
 */
/* ====================================================================
 * Copyright (c) 1998-2001 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

#include <stdio.h>
#include <cryptlib.h>
#include <openssl/objects.h>
#include <openssl/rand.h>
#include <openssl/x509.h>
#include <openssl/pem.h>
#include <openssl/x509v3.h>
#include <openssl/ocsp.h>

/* Utility functions related to sending OCSP responses and extracting
 * relevant information from the request.
 */

int OCSP_request_onereq_count(OCSP_REQUEST *req)
      {
      return sk_OCSP_ONEREQ_num(req->tbsRequest->requestList);
      }

OCSP_ONEREQ *OCSP_request_onereq_get0(OCSP_REQUEST *req, int i)
      {
      return sk_OCSP_ONEREQ_value(req->tbsRequest->requestList, i);
      }

OCSP_CERTID *OCSP_onereq_get0_id(OCSP_ONEREQ *one)
      {
      return one->reqCert;
      }

int OCSP_id_get0_info(ASN1_OCTET_STRING **piNameHash, ASN1_OBJECT **pmd,
                  ASN1_OCTET_STRING **pikeyHash,
                  ASN1_INTEGER **pserial, OCSP_CERTID *cid)
      {
      if (!cid) return 0;
      if (pmd) *pmd = cid->hashAlgorithm->algorithm;
      if(piNameHash) *piNameHash = cid->issuerNameHash;
      if (pikeyHash) *pikeyHash = cid->issuerKeyHash;
      if (pserial) *pserial = cid->serialNumber;
      return 1;
      }

int OCSP_request_is_signed(OCSP_REQUEST *req)
      {
      if(req->optionalSignature) return 1;
      return 0;
      }

/* Create an OCSP response and encode an optional basic response */
OCSP_RESPONSE *OCSP_response_create(int status, OCSP_BASICRESP *bs)
        {
        OCSP_RESPONSE *rsp = NULL;

      if (!(rsp = OCSP_RESPONSE_new())) goto err;
      if (!(ASN1_ENUMERATED_set(rsp->responseStatus, status))) goto err;
      if (!bs) return rsp;
      if (!(rsp->responseBytes = OCSP_RESPBYTES_new())) goto err;
      rsp->responseBytes->responseType = OBJ_nid2obj(NID_id_pkix_OCSP_basic);
      if (!ASN1_item_pack(bs, ASN1_ITEM_rptr(OCSP_BASICRESP), &rsp->responseBytes->response))
                        goto err;
      return rsp;
err:
      if (rsp) OCSP_RESPONSE_free(rsp);
      return NULL;
      }


OCSP_SINGLERESP *OCSP_basic_add1_status(OCSP_BASICRESP *rsp,
                                    OCSP_CERTID *cid,
                                    int status, int reason,
                                    ASN1_TIME *revtime,
                              ASN1_TIME *thisupd, ASN1_TIME *nextupd)
      {
      OCSP_SINGLERESP *single = NULL;
      OCSP_CERTSTATUS *cs;
      OCSP_REVOKEDINFO *ri;

      if(!rsp->tbsResponseData->responses &&
          !(rsp->tbsResponseData->responses = sk_OCSP_SINGLERESP_new_null()))
            goto err;

      if (!(single = OCSP_SINGLERESP_new()))
            goto err;



      if (!ASN1_TIME_to_generalizedtime(thisupd, &single->thisUpdate))
            goto err;
      if (nextupd &&
            !ASN1_TIME_to_generalizedtime(nextupd, &single->nextUpdate))
            goto err;

      OCSP_CERTID_free(single->certId);

      if(!(single->certId = OCSP_CERTID_dup(cid)))
            goto err;

      cs = single->certStatus;
      switch(cs->type = status)
            {
      case V_OCSP_CERTSTATUS_REVOKED:
            if (!revtime)
                    {
                    OCSPerr(OCSP_F_OCSP_BASIC_ADD1_STATUS,OCSP_R_NO_REVOKED_TIME);
                  goto err;
                    }
            if (!(cs->value.revoked = ri = OCSP_REVOKEDINFO_new())) goto err;
            if (!ASN1_TIME_to_generalizedtime(revtime, &ri->revocationTime))
                  goto err;   
            if (reason != OCSP_REVOKED_STATUS_NOSTATUS)
                    {
                  if (!(ri->revocationReason = ASN1_ENUMERATED_new())) 
                          goto err;
                  if (!(ASN1_ENUMERATED_set(ri->revocationReason, 
                                      reason)))
                          goto err; 
                  }
            break;

      case V_OCSP_CERTSTATUS_GOOD:
            cs->value.good = ASN1_NULL_new();
            break;

      case V_OCSP_CERTSTATUS_UNKNOWN:
            cs->value.unknown = ASN1_NULL_new();
            break;

      default:
            goto err;

            }
      if (!(sk_OCSP_SINGLERESP_push(rsp->tbsResponseData->responses, single)))
            goto err;
      return single;
err:
      OCSP_SINGLERESP_free(single);
      return NULL;
      }

/* Add a certificate to an OCSP request */

int OCSP_basic_add1_cert(OCSP_BASICRESP *resp, X509 *cert)
      {
      if (!resp->certs && !(resp->certs = sk_X509_new_null()))
            return 0;

      if(!sk_X509_push(resp->certs, cert)) return 0;
      CRYPTO_add(&cert->references, 1, CRYPTO_LOCK_X509);
      return 1;
      }

int OCSP_basic_sign(OCSP_BASICRESP *brsp, 
                  X509 *signer, EVP_PKEY *key, const EVP_MD *dgst,
                  STACK_OF(X509) *certs, unsigned long flags)
        {
      int i;
      OCSP_RESPID *rid;

      if (!X509_check_private_key(signer, key))
            {
            OCSPerr(OCSP_F_OCSP_BASIC_SIGN, OCSP_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
            goto err;
            }

      if(!(flags & OCSP_NOCERTS))
            {
            if(!OCSP_basic_add1_cert(brsp, signer))
                  goto err;
            for (i = 0; i < sk_X509_num(certs); i++)
                  {
                  X509 *tmpcert = sk_X509_value(certs, i);
                  if(!OCSP_basic_add1_cert(brsp, tmpcert))
                        goto err;
                  }
            }

      rid = brsp->tbsResponseData->responderId;
      if (flags & OCSP_RESPID_KEY)
            {
            unsigned char md[SHA_DIGEST_LENGTH];
            X509_pubkey_digest(signer, EVP_sha1(), md, NULL);
            if (!(rid->value.byKey = ASN1_OCTET_STRING_new()))
                  goto err;
            if (!(ASN1_OCTET_STRING_set(rid->value.byKey, md, SHA_DIGEST_LENGTH)))
                        goto err;
            rid->type = V_OCSP_RESPID_KEY;
            }
      else
            {
            if (!X509_NAME_set(&rid->value.byName,
                              X509_get_subject_name(signer)))
                        goto err;
            rid->type = V_OCSP_RESPID_NAME;
            }

      if (!(flags & OCSP_NOTIME) &&
            !X509_gmtime_adj(brsp->tbsResponseData->producedAt, 0))
            goto err;

      /* Right now, I think that not doing double hashing is the right
         thing.   -- Richard Levitte */

      if (!OCSP_BASICRESP_sign(brsp, key, dgst, 0)) goto err;

      return 1;
err:
      return 0;
      }

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