| /* 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 (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; |
| } |