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383 lines
12 KiB
383 lines
12 KiB
/* ocsp_cl.c */ |
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/* |
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* Written by Tom Titchener <Tom_Titchener@groove.net> for the OpenSSL |
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* project. |
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*/ |
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|
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/* |
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* History: This file was transfered to Richard Levitte from CertCo by Kathy |
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* Weinhold in mid-spring 2000 to be included in OpenSSL or released as a |
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* patch kit. |
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*/ |
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|
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/* ==================================================================== |
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* Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. All advertising materials mentioning features or use of this |
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* software must display the following acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit. (http://www.openssl.org/)" |
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* |
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
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* endorse or promote products derived from this software without |
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* prior written permission. For written permission, please contact |
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* openssl-core@openssl.org. |
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* |
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* 5. Products derived from this software may not be called "OpenSSL" |
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* nor may "OpenSSL" appear in their names without prior written |
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* permission of the OpenSSL Project. |
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* |
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* 6. Redistributions of any form whatsoever must retain the following |
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* acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit (http://www.openssl.org/)" |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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* OF THE POSSIBILITY OF SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This product includes cryptographic software written by Eric Young |
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* (eay@cryptsoft.com). This product includes software written by Tim |
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* Hudson (tjh@cryptsoft.com). |
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* |
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*/ |
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#include <stdio.h> |
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#include <time.h> |
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#include <cryptlib.h> |
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#include <openssl/objects.h> |
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#include <openssl/rand.h> |
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#include <openssl/x509.h> |
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#include <openssl/pem.h> |
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#include <openssl/x509v3.h> |
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#include <openssl/ocsp.h> |
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/* |
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* Utility functions related to sending OCSP requests and extracting relevant |
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* information from the response. |
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*/ |
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|
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/* |
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* Add an OCSP_CERTID to an OCSP request. Return new OCSP_ONEREQ pointer: |
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* useful if we want to add extensions. |
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*/ |
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OCSP_ONEREQ *OCSP_request_add0_id(OCSP_REQUEST *req, OCSP_CERTID *cid) |
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{ |
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OCSP_ONEREQ *one = NULL; |
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if (!(one = OCSP_ONEREQ_new())) |
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goto err; |
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if (one->reqCert) |
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OCSP_CERTID_free(one->reqCert); |
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one->reqCert = cid; |
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if (req && !sk_OCSP_ONEREQ_push(req->tbsRequest->requestList, one)) |
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goto err; |
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return one; |
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err: |
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OCSP_ONEREQ_free(one); |
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return NULL; |
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} |
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/* Set requestorName from an X509_NAME structure */ |
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int OCSP_request_set1_name(OCSP_REQUEST *req, X509_NAME *nm) |
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{ |
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GENERAL_NAME *gen; |
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gen = GENERAL_NAME_new(); |
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if (gen == NULL) |
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return 0; |
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if (!X509_NAME_set(&gen->d.directoryName, nm)) { |
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GENERAL_NAME_free(gen); |
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return 0; |
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} |
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gen->type = GEN_DIRNAME; |
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if (req->tbsRequest->requestorName) |
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GENERAL_NAME_free(req->tbsRequest->requestorName); |
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req->tbsRequest->requestorName = gen; |
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return 1; |
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} |
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/* Add a certificate to an OCSP request */ |
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int OCSP_request_add1_cert(OCSP_REQUEST *req, X509 *cert) |
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{ |
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OCSP_SIGNATURE *sig; |
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if (!req->optionalSignature) |
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req->optionalSignature = OCSP_SIGNATURE_new(); |
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sig = req->optionalSignature; |
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if (!sig) |
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return 0; |
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if (!cert) |
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return 1; |
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if (!sig->certs && !(sig->certs = sk_X509_new_null())) |
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return 0; |
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if (!sk_X509_push(sig->certs, cert)) |
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return 0; |
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CRYPTO_add(&cert->references, 1, CRYPTO_LOCK_X509); |
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return 1; |
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} |
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/* |
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* Sign an OCSP request set the requestorName to the subjec name of an |
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* optional signers certificate and include one or more optional certificates |
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* in the request. Behaves like PKCS7_sign(). |
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*/ |
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int OCSP_request_sign(OCSP_REQUEST *req, |
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X509 *signer, |
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EVP_PKEY *key, |
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const EVP_MD *dgst, |
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STACK_OF(X509) *certs, unsigned long flags) |
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{ |
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int i; |
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OCSP_SIGNATURE *sig; |
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X509 *x; |
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if (!OCSP_request_set1_name(req, X509_get_subject_name(signer))) |
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goto err; |
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if (!(req->optionalSignature = sig = OCSP_SIGNATURE_new())) |
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goto err; |
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if (key) { |
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if (!X509_check_private_key(signer, key)) { |
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OCSPerr(OCSP_F_OCSP_REQUEST_SIGN, |
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OCSP_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE); |
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goto err; |
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} |
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if (!OCSP_REQUEST_sign(req, key, dgst)) |
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goto err; |
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} |
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if (!(flags & OCSP_NOCERTS)) { |
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if (!OCSP_request_add1_cert(req, signer)) |
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goto err; |
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for (i = 0; i < sk_X509_num(certs); i++) { |
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x = sk_X509_value(certs, i); |
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if (!OCSP_request_add1_cert(req, x)) |
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goto err; |
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} |
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} |
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return 1; |
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err: |
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OCSP_SIGNATURE_free(req->optionalSignature); |
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req->optionalSignature = NULL; |
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return 0; |
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} |
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/* Get response status */ |
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int OCSP_response_status(OCSP_RESPONSE *resp) |
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{ |
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return ASN1_ENUMERATED_get(resp->responseStatus); |
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} |
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/* |
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* Extract basic response from OCSP_RESPONSE or NULL if no basic response |
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* present. |
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*/ |
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OCSP_BASICRESP *OCSP_response_get1_basic(OCSP_RESPONSE *resp) |
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{ |
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OCSP_RESPBYTES *rb; |
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rb = resp->responseBytes; |
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if (!rb) { |
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OCSPerr(OCSP_F_OCSP_RESPONSE_GET1_BASIC, OCSP_R_NO_RESPONSE_DATA); |
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return NULL; |
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} |
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if (OBJ_obj2nid(rb->responseType) != NID_id_pkix_OCSP_basic) { |
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OCSPerr(OCSP_F_OCSP_RESPONSE_GET1_BASIC, OCSP_R_NOT_BASIC_RESPONSE); |
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return NULL; |
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} |
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return ASN1_item_unpack(rb->response, ASN1_ITEM_rptr(OCSP_BASICRESP)); |
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} |
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/* |
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* Return number of OCSP_SINGLERESP reponses present in a basic response. |
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*/ |
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int OCSP_resp_count(OCSP_BASICRESP *bs) |
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{ |
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if (!bs) |
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return -1; |
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return sk_OCSP_SINGLERESP_num(bs->tbsResponseData->responses); |
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} |
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/* Extract an OCSP_SINGLERESP response with a given index */ |
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OCSP_SINGLERESP *OCSP_resp_get0(OCSP_BASICRESP *bs, int idx) |
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{ |
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if (!bs) |
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return NULL; |
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return sk_OCSP_SINGLERESP_value(bs->tbsResponseData->responses, idx); |
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} |
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/* Look single response matching a given certificate ID */ |
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int OCSP_resp_find(OCSP_BASICRESP *bs, OCSP_CERTID *id, int last) |
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{ |
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int i; |
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STACK_OF(OCSP_SINGLERESP) *sresp; |
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OCSP_SINGLERESP *single; |
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if (!bs) |
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return -1; |
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if (last < 0) |
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last = 0; |
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else |
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last++; |
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sresp = bs->tbsResponseData->responses; |
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for (i = last; i < sk_OCSP_SINGLERESP_num(sresp); i++) { |
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single = sk_OCSP_SINGLERESP_value(sresp, i); |
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if (!OCSP_id_cmp(id, single->certId)) |
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return i; |
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} |
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return -1; |
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} |
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/* |
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* Extract status information from an OCSP_SINGLERESP structure. Note: the |
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* revtime and reason values are only set if the certificate status is |
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* revoked. Returns numerical value of status. |
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*/ |
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int OCSP_single_get0_status(OCSP_SINGLERESP *single, int *reason, |
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ASN1_GENERALIZEDTIME **revtime, |
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ASN1_GENERALIZEDTIME **thisupd, |
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ASN1_GENERALIZEDTIME **nextupd) |
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{ |
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int ret; |
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OCSP_CERTSTATUS *cst; |
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if (!single) |
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return -1; |
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cst = single->certStatus; |
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ret = cst->type; |
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if (ret == V_OCSP_CERTSTATUS_REVOKED) { |
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OCSP_REVOKEDINFO *rev = cst->value.revoked; |
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if (revtime) |
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*revtime = rev->revocationTime; |
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if (reason) { |
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if (rev->revocationReason) |
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*reason = ASN1_ENUMERATED_get(rev->revocationReason); |
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else |
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*reason = -1; |
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} |
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} |
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if (thisupd) |
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*thisupd = single->thisUpdate; |
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if (nextupd) |
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*nextupd = single->nextUpdate; |
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return ret; |
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} |
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/* |
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* This function combines the previous ones: look up a certificate ID and if |
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* found extract status information. Return 0 is successful. |
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*/ |
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int OCSP_resp_find_status(OCSP_BASICRESP *bs, OCSP_CERTID *id, int *status, |
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int *reason, |
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ASN1_GENERALIZEDTIME **revtime, |
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ASN1_GENERALIZEDTIME **thisupd, |
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ASN1_GENERALIZEDTIME **nextupd) |
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{ |
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int i; |
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OCSP_SINGLERESP *single; |
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i = OCSP_resp_find(bs, id, -1); |
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/* Maybe check for multiple responses and give an error? */ |
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if (i < 0) |
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return 0; |
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single = OCSP_resp_get0(bs, i); |
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i = OCSP_single_get0_status(single, reason, revtime, thisupd, nextupd); |
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if (status) |
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*status = i; |
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return 1; |
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} |
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/* |
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* Check validity of thisUpdate and nextUpdate fields. It is possible that |
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* the request will take a few seconds to process and/or the time wont be |
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* totally accurate. Therefore to avoid rejecting otherwise valid time we |
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* allow the times to be within 'nsec' of the current time. Also to avoid |
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* accepting very old responses without a nextUpdate field an optional maxage |
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* parameter specifies the maximum age the thisUpdate field can be. |
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*/ |
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int OCSP_check_validity(ASN1_GENERALIZEDTIME *thisupd, |
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ASN1_GENERALIZEDTIME *nextupd, long nsec, long maxsec) |
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{ |
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int ret = 1; |
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time_t t_now, t_tmp; |
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time(&t_now); |
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/* Check thisUpdate is valid and not more than nsec in the future */ |
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if (!ASN1_GENERALIZEDTIME_check(thisupd)) { |
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OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_ERROR_IN_THISUPDATE_FIELD); |
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ret = 0; |
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} else { |
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t_tmp = t_now + nsec; |
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if (X509_cmp_time(thisupd, &t_tmp) > 0) { |
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OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_STATUS_NOT_YET_VALID); |
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ret = 0; |
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} |
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/* |
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* If maxsec specified check thisUpdate is not more than maxsec in |
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* the past |
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*/ |
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if (maxsec >= 0) { |
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t_tmp = t_now - maxsec; |
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if (X509_cmp_time(thisupd, &t_tmp) < 0) { |
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OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_STATUS_TOO_OLD); |
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ret = 0; |
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} |
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} |
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} |
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if (!nextupd) |
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return ret; |
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/* Check nextUpdate is valid and not more than nsec in the past */ |
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if (!ASN1_GENERALIZEDTIME_check(nextupd)) { |
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OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_ERROR_IN_NEXTUPDATE_FIELD); |
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ret = 0; |
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} else { |
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t_tmp = t_now - nsec; |
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if (X509_cmp_time(nextupd, &t_tmp) < 0) { |
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OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, OCSP_R_STATUS_EXPIRED); |
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ret = 0; |
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} |
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} |
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/* Also don't allow nextUpdate to precede thisUpdate */ |
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if (ASN1_STRING_cmp(nextupd, thisupd) < 0) { |
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OCSPerr(OCSP_F_OCSP_CHECK_VALIDITY, |
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OCSP_R_NEXTUPDATE_BEFORE_THISUPDATE); |
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ret = 0; |
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} |
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return ret; |
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}
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