ocsp_cl.c
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- /* ocsp_cl.c */
- /* Written by Tom Titchener <Tom_Titchener@groove.net> for the OpenSSL
- * project. */
- /* History:
- This file was transfered to Richard Levitte from CertCo by Kathy
- Weinhold in mid-spring 2000 to be included in OpenSSL or released
- as a patch kit. */
- /* ====================================================================
- * Copyright (c) 1998-2000 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 <time.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 requests and extracting
- * relevant information from the response.
- */
- /* Add an OCSP_CERTID to an OCSP request. Return new OCSP_ONEREQ
- * pointer: useful if we want to add extensions.
- */
- OCSP_ONEREQ *OCSP_request_add0_id(OCSP_REQUEST *req, OCSP_CERTID *cid)
- {
- OCSP_ONEREQ *one = NULL;
- if (!(one = OCSP_ONEREQ_new())) goto err;
- if (one->reqCert) OCSP_CERTID_free(one->reqCert);
- one->reqCert = cid;
- if (req &&
- !sk_OCSP_ONEREQ_push(req->tbsRequest->requestList, one))
- goto err;
- return one;
- err:
- OCSP_ONEREQ_free(one);
- return NULL;
- }
- /* Set requestorName from an X509_NAME structure */
- int OCSP_request_set1_name(OCSP_REQUEST *req, X509_NAME *nm)
- {
- GENERAL_NAME *gen;
- gen = GENERAL_NAME_new();
- if (gen == NULL)
- return 0;
- if (!X509_NAME_set(&gen->d.directoryName, nm))
- {
- GENERAL_NAME_free(gen);
- return 0;
- }
- gen->type = GEN_DIRNAME;
- if (req->tbsRequest->requestorName)
- GENERAL_NAME_free(req->tbsRequest->requestorName);
- req->tbsRequest->requestorName = gen;
- return 1;
- }
-
- /* Add a certificate to an OCSP request */
- int OCSP_request_add1_cert(OCSP_REQUEST *req, X509 *cert)
- {
- OCSP_SIGNATURE *sig;
- if (!req->optionalSignature)
- req->optionalSignature = OCSP_SIGNATURE_new();
- sig = req->optionalSignature;
- if (!sig) return 0;
- if (!cert) return 1;
- if (!sig->certs && !(sig->certs = sk_X509_new_null()))
- return 0;
- if(!sk_X509_push(sig->certs, cert)) return 0;
- CRYPTO_add(&cert->references, 1, CRYPTO_LOCK_X509);
- return 1;
- }
- /* Sign an OCSP request set the requestorName to the subjec
- * name of an optional signers certificate and include one
- * or more optional certificates in the request. Behaves
- * like PKCS7_sign().
- */
- int OCSP_request_sign(OCSP_REQUEST *req,
- X509 *signer,
- EVP_PKEY *key,
- const EVP_MD *dgst,
- STACK_OF(X509) *certs,
- unsigned long flags)
- {
- int i;
- OCSP_SIGNATURE *sig;
- X509 *x;
- if (!OCSP_request_set1_name(req, X509_get_subject_name(signer)))
- goto err;
- if (!(req->optionalSignature = sig = OCSP_SIGNATURE_new())) goto err;
- if (!dgst) dgst = EVP_sha1();
- if (key)
- {
- if (!X509_check_private_key(signer, key))
- {
- OCSPerr(OCSP_F_OCSP_REQUEST_SIGN, OCSP_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
- goto err;
- }
- if (!OCSP_REQUEST_sign(req, key, dgst)) goto err;
- }
- if (!(flags & OCSP_NOCERTS))
- {
- if(!OCSP_request_add1_cert(req, signer)) goto err;
- for (i = 0; i < sk_X509_num(certs); i++)
- {
- x = sk_X509_value(certs, i);
- if (!OCSP_request_add1_cert(req, x)) goto err;
- }
- }
- return 1;
- err:
- OCSP_SIGNATURE_free(req->optionalSignature);
- req->optionalSignature = NULL;
- return 0;
- }
- /* Get response status */
- int OCSP_response_status(OCSP_RESPONSE *resp)
- {
- return ASN1_ENUMERATED_get(resp->responseStatus);
- }
- /* Extract basic response from OCSP_RESPONSE or NULL if
- * no basic response present.
- */
-
- OCSP_BASICRESP *OCSP_response_get1_basic(OCSP_RESPONSE *resp)
- {
- OCSP_RESPBYTES *rb;
- rb = resp->responseBytes;
- if (!rb)
- {
- OCSPerr(OCSP_F_OCSP_RESPONSE_GET1_BASIC, OCSP_R_NO_RESPONSE_DATA);
- return NULL;
- }
- if (OBJ_obj2nid(rb->responseType) != NID_id_pkix_OCSP_basic)
- {
- OCSPerr(OCSP_F_OCSP_RESPONSE_GET1_BASIC, OCSP_R_NOT_BASIC_RESPONSE);
- return NULL;
- }
- return ASN1_item_unpack(rb->response, ASN1_ITEM_rptr(OCSP_BASICRESP));
- }
- /* Return number of OCSP_SINGLERESP reponses present in
- * a basic response.
- */
- int OCSP_resp_count(OCSP_BASICRESP *bs)
- {
- if (!bs) return -1;
- return sk_OCSP_SINGLERESP_num(bs->tbsResponseData->responses);
- }
- /* Extract an OCSP_SINGLERESP response with a given index */
- OCSP_SINGLERESP *OCSP_resp_get0(OCSP_BASICRESP *bs, int idx)
- {
- if (!bs) return NULL;
- return sk_OCSP_SINGLERESP_value(bs->tbsResponseData->responses, idx);
- }
- /* Look single response matching a given certificate ID */
- int OCSP_resp_find(OCSP_BASICRESP *bs, OCSP_CERTID *id, int last)
- {
- int i;
- STACK_OF(OCSP_SINGLERESP) *sresp;
- OCSP_SINGLERESP *single;
- if (!bs) return -1;
- if (last < 0) last = 0;
- else last++;
- sresp = bs->tbsResponseData->responses;
- for (i = last; i < sk_OCSP_SINGLERESP_num(sresp); i++)
- {
- single = sk_OCSP_SINGLERESP_value(sresp, i);
- if (!OCSP_id_cmp(id, single->certId)) return i;
- }
- return -1;
- }
- /* Extract status information from an OCSP_SINGLERESP structure.
- * Note: the revtime and reason values are only set if the
- * certificate status is revoked. Returns numerical value of
- * status.
- */
- int OCSP_single_get0_status(OCSP_SINGLERESP *single, int *reason,
- ASN1_GENERALIZEDTIME **revtime,
- ASN1_GENERALIZEDTIME **thisupd,
- ASN1_GENERALIZEDTIME **nextupd)
- {
- int ret;
- OCSP_CERTSTATUS *cst;
- if(!single) return -1;
- cst = single->certStatus;
- ret = cst->type;
- if (ret == V_OCSP_CERTSTATUS_REVOKED)
- {
- OCSP_REVOKEDINFO *rev = cst->value.revoked;
- if (revtime) *revtime = rev->revocationTime;
- if (reason)
- {
- if(rev->revocationReason)
- *reason = ASN1_ENUMERATED_get(rev->revocationReason);
- else *reason = -1;
- }
- }
- if(thisupd) *thisupd = single->thisUpdate;
- if(nextupd) *nextupd = single->nextUpdate;
- return ret;
- }
- /* This function combines the previous ones: look up a certificate ID and
- * if found extract status information. Return 0 is successful.
- */
- int OCSP_resp_find_status(OCSP_BASICRESP *bs, OCSP_CERTID *id, int *status,
- int *reason,
- ASN1_GENERALIZEDTIME **revtime,
- ASN1_GENERALIZEDTIME **thisupd,
- ASN1_GENERALIZEDTIME **nextupd)
- {
- int i;
- OCSP_SINGLERESP *single;
- i = OCSP_resp_find(bs, id, -1);
- /* Maybe check for multiple responses and give an error? */
- if(i < 0) return 0;
- single = OCSP_resp_get0(bs, i);
- i = OCSP_single_get0_status(single, reason, revtime, thisupd, nextupd);
- if(status) *status = i;
- return 1;
- }
- /* Check validity of thisUpdate and nextUpdate fields. It is possible that the request will
- * take a few seconds to process and/or the time wont be totally accurate. Therefore to avoid
- * rejecting otherwise valid time we allow the times to be within 'nsec' of the current time.
- * Also to avoid accepting very old responses without a nextUpdate field an optional maxage
- * parameter specifies the maximum age the thisUpdate field can be.
- */
- int OCSP_check_validity(ASN1_GENERALIZEDTIME *thisupd, ASN1_GENERALIZEDTIME *nextupd, long nsec, long maxsec)
- {
- int ret = 1;
- time_t t_now, t_tmp;
- time(&t_now);
- /* Check thisUpdate is valid and not more than nsec in the future */
- if (!ASN1_GENERALIZEDTIME_check(thisupd))
- {
- OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_ERROR_IN_THISUPDATE_FIELD);
- ret = 0;
- }
- else
- {
- t_tmp = t_now + nsec;
- if (X509_cmp_time(thisupd, &t_tmp) > 0)
- {
- OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_STATUS_NOT_YET_VALID);
- ret = 0;
- }
- /* If maxsec specified check thisUpdate is not more than maxsec in the past */
- if (maxsec >= 0)
- {
- t_tmp = t_now - maxsec;
- if (X509_cmp_time(thisupd, &t_tmp) < 0)
- {
- OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_STATUS_TOO_OLD);
- ret = 0;
- }
- }
- }
-
- if (!nextupd) return ret;
- /* Check nextUpdate is valid and not more than nsec in the past */
- if (!ASN1_GENERALIZEDTIME_check(nextupd))
- {
- OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_ERROR_IN_NEXTUPDATE_FIELD);
- ret = 0;
- }
- else
- {
- t_tmp = t_now - nsec;
- if (X509_cmp_time(nextupd, &t_tmp) < 0)
- {
- OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_STATUS_EXPIRED);
- ret = 0;
- }
- }
- /* Also don't allow nextUpdate to precede thisUpdate */
- if (ASN1_STRING_cmp(nextupd, thisupd) < 0)
- {
- OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_NEXTUPDATE_BEFORE_THISUPDATE);
- ret = 0;
- }
- return ret;
- }