567 lines
18 KiB
C
567 lines
18 KiB
C
/* ocsp_ext.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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* 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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* 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 <cryptlib.h>
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#include <openssl/objects.h>
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#include <openssl/x509.h>
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#include <openssl/ocsp.h>
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#include <openssl/rand.h>
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#include <openssl/x509v3.h>
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/* Standard wrapper functions for extensions */
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/* OCSP request extensions */
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int OCSP_REQUEST_get_ext_count(OCSP_REQUEST *x)
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{
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return (X509v3_get_ext_count(x->tbsRequest->requestExtensions));
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}
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int OCSP_REQUEST_get_ext_by_NID(OCSP_REQUEST *x, int nid, int lastpos)
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{
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return (X509v3_get_ext_by_NID
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(x->tbsRequest->requestExtensions, nid, lastpos));
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}
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int OCSP_REQUEST_get_ext_by_OBJ(OCSP_REQUEST *x, ASN1_OBJECT *obj,
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int lastpos)
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{
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return (X509v3_get_ext_by_OBJ
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(x->tbsRequest->requestExtensions, obj, lastpos));
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}
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int OCSP_REQUEST_get_ext_by_critical(OCSP_REQUEST *x, int crit, int lastpos)
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{
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return (X509v3_get_ext_by_critical
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(x->tbsRequest->requestExtensions, crit, lastpos));
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}
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X509_EXTENSION *OCSP_REQUEST_get_ext(OCSP_REQUEST *x, int loc)
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{
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return (X509v3_get_ext(x->tbsRequest->requestExtensions, loc));
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}
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X509_EXTENSION *OCSP_REQUEST_delete_ext(OCSP_REQUEST *x, int loc)
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{
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return (X509v3_delete_ext(x->tbsRequest->requestExtensions, loc));
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}
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void *OCSP_REQUEST_get1_ext_d2i(OCSP_REQUEST *x, int nid, int *crit, int *idx)
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{
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return X509V3_get_d2i(x->tbsRequest->requestExtensions, nid, crit, idx);
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}
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int OCSP_REQUEST_add1_ext_i2d(OCSP_REQUEST *x, int nid, void *value, int crit,
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unsigned long flags)
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{
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return X509V3_add1_i2d(&x->tbsRequest->requestExtensions, nid, value,
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crit, flags);
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}
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int OCSP_REQUEST_add_ext(OCSP_REQUEST *x, X509_EXTENSION *ex, int loc)
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{
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return (X509v3_add_ext(&(x->tbsRequest->requestExtensions), ex, loc) !=
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NULL);
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}
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/* Single extensions */
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int OCSP_ONEREQ_get_ext_count(OCSP_ONEREQ *x)
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{
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return (X509v3_get_ext_count(x->singleRequestExtensions));
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}
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int OCSP_ONEREQ_get_ext_by_NID(OCSP_ONEREQ *x, int nid, int lastpos)
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{
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return (X509v3_get_ext_by_NID(x->singleRequestExtensions, nid, lastpos));
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}
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int OCSP_ONEREQ_get_ext_by_OBJ(OCSP_ONEREQ *x, ASN1_OBJECT *obj, int lastpos)
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{
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return (X509v3_get_ext_by_OBJ(x->singleRequestExtensions, obj, lastpos));
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}
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int OCSP_ONEREQ_get_ext_by_critical(OCSP_ONEREQ *x, int crit, int lastpos)
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{
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return (X509v3_get_ext_by_critical
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(x->singleRequestExtensions, crit, lastpos));
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}
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X509_EXTENSION *OCSP_ONEREQ_get_ext(OCSP_ONEREQ *x, int loc)
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{
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return (X509v3_get_ext(x->singleRequestExtensions, loc));
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}
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X509_EXTENSION *OCSP_ONEREQ_delete_ext(OCSP_ONEREQ *x, int loc)
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{
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return (X509v3_delete_ext(x->singleRequestExtensions, loc));
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}
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void *OCSP_ONEREQ_get1_ext_d2i(OCSP_ONEREQ *x, int nid, int *crit, int *idx)
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{
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return X509V3_get_d2i(x->singleRequestExtensions, nid, crit, idx);
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}
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int OCSP_ONEREQ_add1_ext_i2d(OCSP_ONEREQ *x, int nid, void *value, int crit,
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unsigned long flags)
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{
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return X509V3_add1_i2d(&x->singleRequestExtensions, nid, value, crit,
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flags);
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}
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int OCSP_ONEREQ_add_ext(OCSP_ONEREQ *x, X509_EXTENSION *ex, int loc)
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{
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return (X509v3_add_ext(&(x->singleRequestExtensions), ex, loc) != NULL);
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}
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/* OCSP Basic response */
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int OCSP_BASICRESP_get_ext_count(OCSP_BASICRESP *x)
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{
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return (X509v3_get_ext_count(x->tbsResponseData->responseExtensions));
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}
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int OCSP_BASICRESP_get_ext_by_NID(OCSP_BASICRESP *x, int nid, int lastpos)
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{
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return (X509v3_get_ext_by_NID
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(x->tbsResponseData->responseExtensions, nid, lastpos));
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}
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int OCSP_BASICRESP_get_ext_by_OBJ(OCSP_BASICRESP *x, ASN1_OBJECT *obj,
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int lastpos)
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{
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return (X509v3_get_ext_by_OBJ
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(x->tbsResponseData->responseExtensions, obj, lastpos));
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}
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int OCSP_BASICRESP_get_ext_by_critical(OCSP_BASICRESP *x, int crit,
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int lastpos)
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{
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return (X509v3_get_ext_by_critical
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(x->tbsResponseData->responseExtensions, crit, lastpos));
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}
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X509_EXTENSION *OCSP_BASICRESP_get_ext(OCSP_BASICRESP *x, int loc)
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{
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return (X509v3_get_ext(x->tbsResponseData->responseExtensions, loc));
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}
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X509_EXTENSION *OCSP_BASICRESP_delete_ext(OCSP_BASICRESP *x, int loc)
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{
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return (X509v3_delete_ext(x->tbsResponseData->responseExtensions, loc));
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}
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void *OCSP_BASICRESP_get1_ext_d2i(OCSP_BASICRESP *x, int nid, int *crit,
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int *idx)
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{
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return X509V3_get_d2i(x->tbsResponseData->responseExtensions, nid, crit,
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idx);
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}
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int OCSP_BASICRESP_add1_ext_i2d(OCSP_BASICRESP *x, int nid, void *value,
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int crit, unsigned long flags)
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{
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return X509V3_add1_i2d(&x->tbsResponseData->responseExtensions, nid,
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value, crit, flags);
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}
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int OCSP_BASICRESP_add_ext(OCSP_BASICRESP *x, X509_EXTENSION *ex, int loc)
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{
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return (X509v3_add_ext(&(x->tbsResponseData->responseExtensions), ex, loc)
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!= NULL);
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}
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/* OCSP single response extensions */
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int OCSP_SINGLERESP_get_ext_count(OCSP_SINGLERESP *x)
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{
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return (X509v3_get_ext_count(x->singleExtensions));
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}
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int OCSP_SINGLERESP_get_ext_by_NID(OCSP_SINGLERESP *x, int nid, int lastpos)
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{
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return (X509v3_get_ext_by_NID(x->singleExtensions, nid, lastpos));
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}
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int OCSP_SINGLERESP_get_ext_by_OBJ(OCSP_SINGLERESP *x, ASN1_OBJECT *obj,
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int lastpos)
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{
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return (X509v3_get_ext_by_OBJ(x->singleExtensions, obj, lastpos));
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}
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int OCSP_SINGLERESP_get_ext_by_critical(OCSP_SINGLERESP *x, int crit,
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int lastpos)
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{
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return (X509v3_get_ext_by_critical(x->singleExtensions, crit, lastpos));
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}
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X509_EXTENSION *OCSP_SINGLERESP_get_ext(OCSP_SINGLERESP *x, int loc)
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{
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return (X509v3_get_ext(x->singleExtensions, loc));
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}
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X509_EXTENSION *OCSP_SINGLERESP_delete_ext(OCSP_SINGLERESP *x, int loc)
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{
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return (X509v3_delete_ext(x->singleExtensions, loc));
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}
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void *OCSP_SINGLERESP_get1_ext_d2i(OCSP_SINGLERESP *x, int nid, int *crit,
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int *idx)
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{
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return X509V3_get_d2i(x->singleExtensions, nid, crit, idx);
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}
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int OCSP_SINGLERESP_add1_ext_i2d(OCSP_SINGLERESP *x, int nid, void *value,
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int crit, unsigned long flags)
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{
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return X509V3_add1_i2d(&x->singleExtensions, nid, value, crit, flags);
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}
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int OCSP_SINGLERESP_add_ext(OCSP_SINGLERESP *x, X509_EXTENSION *ex, int loc)
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{
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return (X509v3_add_ext(&(x->singleExtensions), ex, loc) != NULL);
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}
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/* also CRL Entry Extensions */
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#if 0
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ASN1_STRING *ASN1_STRING_encode(ASN1_STRING *s, i2d_of_void *i2d,
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void *data, STACK_OF(ASN1_OBJECT) *sk)
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{
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int i;
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unsigned char *p, *b = NULL;
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if (data) {
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if ((i = i2d(data, NULL)) <= 0)
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goto err;
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if (!(b = p = OPENSSL_malloc((unsigned int)i)))
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goto err;
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if (i2d(data, &p) <= 0)
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goto err;
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} else if (sk) {
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if ((i = i2d_ASN1_SET_OF_ASN1_OBJECT(sk, NULL,
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(I2D_OF(ASN1_OBJECT)) i2d,
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V_ASN1_SEQUENCE,
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V_ASN1_UNIVERSAL,
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IS_SEQUENCE)) <= 0)
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goto err;
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if (!(b = p = OPENSSL_malloc((unsigned int)i)))
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goto err;
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if (i2d_ASN1_SET_OF_ASN1_OBJECT(sk, &p, (I2D_OF(ASN1_OBJECT)) i2d,
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V_ASN1_SEQUENCE,
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V_ASN1_UNIVERSAL, IS_SEQUENCE) <= 0)
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goto err;
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} else {
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OCSPerr(OCSP_F_ASN1_STRING_ENCODE, OCSP_R_BAD_DATA);
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goto err;
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}
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if (!s && !(s = ASN1_STRING_new()))
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goto err;
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if (!(ASN1_STRING_set(s, b, i)))
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goto err;
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OPENSSL_free(b);
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return s;
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err:
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if (b)
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OPENSSL_free(b);
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return NULL;
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}
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#endif
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/* Nonce handling functions */
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/*
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* Add a nonce to an extension stack. A nonce can be specificed or if NULL a
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* random nonce will be generated. Note: OpenSSL 0.9.7d and later create an
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* OCTET STRING containing the nonce, previous versions used the raw nonce.
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*/
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static int ocsp_add1_nonce(STACK_OF(X509_EXTENSION) **exts,
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unsigned char *val, int len)
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{
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unsigned char *tmpval;
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ASN1_OCTET_STRING os;
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int ret = 0;
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if (len <= 0)
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len = OCSP_DEFAULT_NONCE_LENGTH;
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/*
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* Create the OCTET STRING manually by writing out the header and
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* appending the content octets. This avoids an extra memory allocation
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* operation in some cases. Applications should *NOT* do this because it
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* relies on library internals.
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*/
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os.length = ASN1_object_size(0, len, V_ASN1_OCTET_STRING);
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os.data = OPENSSL_malloc(os.length);
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if (os.data == NULL)
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goto err;
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tmpval = os.data;
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ASN1_put_object(&tmpval, 0, len, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL);
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if (val)
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memcpy(tmpval, val, len);
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else if (RAND_bytes(tmpval, len) <= 0)
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goto err;
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if (!X509V3_add1_i2d(exts, NID_id_pkix_OCSP_Nonce,
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&os, 0, X509V3_ADD_REPLACE))
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goto err;
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ret = 1;
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err:
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if (os.data)
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OPENSSL_free(os.data);
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return ret;
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}
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/* Add nonce to an OCSP request */
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int OCSP_request_add1_nonce(OCSP_REQUEST *req, unsigned char *val, int len)
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{
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return ocsp_add1_nonce(&req->tbsRequest->requestExtensions, val, len);
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}
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/* Same as above but for a response */
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int OCSP_basic_add1_nonce(OCSP_BASICRESP *resp, unsigned char *val, int len)
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{
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return ocsp_add1_nonce(&resp->tbsResponseData->responseExtensions, val,
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len);
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}
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/*-
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* Check nonce validity in a request and response.
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* Return value reflects result:
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* 1: nonces present and equal.
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* 2: nonces both absent.
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* 3: nonce present in response only.
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* 0: nonces both present and not equal.
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* -1: nonce in request only.
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*
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* For most responders clients can check return > 0.
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* If responder doesn't handle nonces return != 0 may be
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* necessary. return == 0 is always an error.
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*/
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int OCSP_check_nonce(OCSP_REQUEST *req, OCSP_BASICRESP *bs)
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{
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/*
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* Since we are only interested in the presence or absence of
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* the nonce and comparing its value there is no need to use
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* the X509V3 routines: this way we can avoid them allocating an
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* ASN1_OCTET_STRING structure for the value which would be
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* freed immediately anyway.
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*/
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int req_idx, resp_idx;
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X509_EXTENSION *req_ext, *resp_ext;
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req_idx = OCSP_REQUEST_get_ext_by_NID(req, NID_id_pkix_OCSP_Nonce, -1);
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resp_idx = OCSP_BASICRESP_get_ext_by_NID(bs, NID_id_pkix_OCSP_Nonce, -1);
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/* Check both absent */
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if ((req_idx < 0) && (resp_idx < 0))
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return 2;
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/* Check in request only */
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if ((req_idx >= 0) && (resp_idx < 0))
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return -1;
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/* Check in response but not request */
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if ((req_idx < 0) && (resp_idx >= 0))
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return 3;
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/*
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* Otherwise nonce in request and response so retrieve the extensions
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*/
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req_ext = OCSP_REQUEST_get_ext(req, req_idx);
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resp_ext = OCSP_BASICRESP_get_ext(bs, resp_idx);
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if (ASN1_OCTET_STRING_cmp(req_ext->value, resp_ext->value))
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return 0;
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return 1;
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}
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/*
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* Copy the nonce value (if any) from an OCSP request to a response.
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*/
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int OCSP_copy_nonce(OCSP_BASICRESP *resp, OCSP_REQUEST *req)
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{
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X509_EXTENSION *req_ext;
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int req_idx;
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/* Check for nonce in request */
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req_idx = OCSP_REQUEST_get_ext_by_NID(req, NID_id_pkix_OCSP_Nonce, -1);
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/* If no nonce that's OK */
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if (req_idx < 0)
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return 2;
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req_ext = OCSP_REQUEST_get_ext(req, req_idx);
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return OCSP_BASICRESP_add_ext(resp, req_ext, -1);
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}
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X509_EXTENSION *OCSP_crlID_new(char *url, long *n, char *tim)
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{
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X509_EXTENSION *x = NULL;
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OCSP_CRLID *cid = NULL;
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if (!(cid = OCSP_CRLID_new()))
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goto err;
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if (url) {
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if (!(cid->crlUrl = ASN1_IA5STRING_new()))
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goto err;
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if (!(ASN1_STRING_set(cid->crlUrl, url, -1)))
|
|
goto err;
|
|
}
|
|
if (n) {
|
|
if (!(cid->crlNum = ASN1_INTEGER_new()))
|
|
goto err;
|
|
if (!(ASN1_INTEGER_set(cid->crlNum, *n)))
|
|
goto err;
|
|
}
|
|
if (tim) {
|
|
if (!(cid->crlTime = ASN1_GENERALIZEDTIME_new()))
|
|
goto err;
|
|
if (!(ASN1_GENERALIZEDTIME_set_string(cid->crlTime, tim)))
|
|
goto err;
|
|
}
|
|
x = X509V3_EXT_i2d(NID_id_pkix_OCSP_CrlID, 0, cid);
|
|
err:
|
|
if (cid)
|
|
OCSP_CRLID_free(cid);
|
|
return x;
|
|
}
|
|
|
|
/* AcceptableResponses ::= SEQUENCE OF OBJECT IDENTIFIER */
|
|
X509_EXTENSION *OCSP_accept_responses_new(char **oids)
|
|
{
|
|
int nid;
|
|
STACK_OF(ASN1_OBJECT) *sk = NULL;
|
|
ASN1_OBJECT *o = NULL;
|
|
X509_EXTENSION *x = NULL;
|
|
|
|
if (!(sk = sk_ASN1_OBJECT_new_null()))
|
|
goto err;
|
|
while (oids && *oids) {
|
|
if ((nid = OBJ_txt2nid(*oids)) != NID_undef && (o = OBJ_nid2obj(nid)))
|
|
sk_ASN1_OBJECT_push(sk, o);
|
|
oids++;
|
|
}
|
|
x = X509V3_EXT_i2d(NID_id_pkix_OCSP_acceptableResponses, 0, sk);
|
|
err:
|
|
if (sk)
|
|
sk_ASN1_OBJECT_pop_free(sk, ASN1_OBJECT_free);
|
|
return x;
|
|
}
|
|
|
|
/* ArchiveCutoff ::= GeneralizedTime */
|
|
X509_EXTENSION *OCSP_archive_cutoff_new(char *tim)
|
|
{
|
|
X509_EXTENSION *x = NULL;
|
|
ASN1_GENERALIZEDTIME *gt = NULL;
|
|
|
|
if (!(gt = ASN1_GENERALIZEDTIME_new()))
|
|
goto err;
|
|
if (!(ASN1_GENERALIZEDTIME_set_string(gt, tim)))
|
|
goto err;
|
|
x = X509V3_EXT_i2d(NID_id_pkix_OCSP_archiveCutoff, 0, gt);
|
|
err:
|
|
if (gt)
|
|
ASN1_GENERALIZEDTIME_free(gt);
|
|
return x;
|
|
}
|
|
|
|
/*
|
|
* per ACCESS_DESCRIPTION parameter are oids, of which there are currently
|
|
* two--NID_ad_ocsp, NID_id_ad_caIssuers--and GeneralName value. This method
|
|
* forces NID_ad_ocsp and uniformResourceLocator [6] IA5String.
|
|
*/
|
|
X509_EXTENSION *OCSP_url_svcloc_new(X509_NAME *issuer, char **urls)
|
|
{
|
|
X509_EXTENSION *x = NULL;
|
|
ASN1_IA5STRING *ia5 = NULL;
|
|
OCSP_SERVICELOC *sloc = NULL;
|
|
ACCESS_DESCRIPTION *ad = NULL;
|
|
|
|
if (!(sloc = OCSP_SERVICELOC_new()))
|
|
goto err;
|
|
if (!(sloc->issuer = X509_NAME_dup(issuer)))
|
|
goto err;
|
|
if (urls && *urls && !(sloc->locator = sk_ACCESS_DESCRIPTION_new_null()))
|
|
goto err;
|
|
while (urls && *urls) {
|
|
if (!(ad = ACCESS_DESCRIPTION_new()))
|
|
goto err;
|
|
if (!(ad->method = OBJ_nid2obj(NID_ad_OCSP)))
|
|
goto err;
|
|
if (!(ad->location = GENERAL_NAME_new()))
|
|
goto err;
|
|
if (!(ia5 = ASN1_IA5STRING_new()))
|
|
goto err;
|
|
if (!ASN1_STRING_set((ASN1_STRING *)ia5, *urls, -1))
|
|
goto err;
|
|
ad->location->type = GEN_URI;
|
|
ad->location->d.ia5 = ia5;
|
|
if (!sk_ACCESS_DESCRIPTION_push(sloc->locator, ad))
|
|
goto err;
|
|
urls++;
|
|
}
|
|
x = X509V3_EXT_i2d(NID_id_pkix_OCSP_serviceLocator, 0, sloc);
|
|
err:
|
|
if (sloc)
|
|
OCSP_SERVICELOC_free(sloc);
|
|
return x;
|
|
}
|