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566 lines
18 KiB
566 lines
18 KiB
/* 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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|
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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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|
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/* Standard wrapper functions for extensions */ |
|
|
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/* OCSP request extensions */ |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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/* OCSP single response extensions */ |
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|
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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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|
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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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|
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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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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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return (X509v3_add_ext(&(x->singleExtensions), ex, loc) != NULL); |
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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; |
|
|
|
if (data) { |
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if ((i = i2d(data, NULL)) <= 0) |
|
goto err; |
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if (!(b = p = OPENSSL_malloc((unsigned int)i))) |
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goto err; |
|
if (i2d(data, &p) <= 0) |
|
goto err; |
|
} else if (sk) { |
|
if ((i = i2d_ASN1_SET_OF_ASN1_OBJECT(sk, NULL, |
|
(I2D_OF(ASN1_OBJECT)) i2d, |
|
V_ASN1_SEQUENCE, |
|
V_ASN1_UNIVERSAL, |
|
IS_SEQUENCE)) <= 0) |
|
goto err; |
|
if (!(b = p = OPENSSL_malloc((unsigned int)i))) |
|
goto err; |
|
if (i2d_ASN1_SET_OF_ASN1_OBJECT(sk, &p, (I2D_OF(ASN1_OBJECT)) i2d, |
|
V_ASN1_SEQUENCE, |
|
V_ASN1_UNIVERSAL, IS_SEQUENCE) <= 0) |
|
goto err; |
|
} else { |
|
OCSPerr(OCSP_F_ASN1_STRING_ENCODE, OCSP_R_BAD_DATA); |
|
goto err; |
|
} |
|
if (!s && !(s = ASN1_STRING_new())) |
|
goto err; |
|
if (!(ASN1_STRING_set(s, b, i))) |
|
goto err; |
|
OPENSSL_free(b); |
|
return s; |
|
err: |
|
if (b) |
|
OPENSSL_free(b); |
|
return NULL; |
|
} |
|
#endif |
|
|
|
/* Nonce handling functions */ |
|
|
|
/* |
|
* Add a nonce to an extension stack. A nonce can be specificed or if NULL a |
|
* random nonce will be generated. Note: OpenSSL 0.9.7d and later create an |
|
* OCTET STRING containing the nonce, previous versions used the raw nonce. |
|
*/ |
|
|
|
static int ocsp_add1_nonce(STACK_OF(X509_EXTENSION) **exts, |
|
unsigned char *val, int len) |
|
{ |
|
unsigned char *tmpval; |
|
ASN1_OCTET_STRING os; |
|
int ret = 0; |
|
if (len <= 0) |
|
len = OCSP_DEFAULT_NONCE_LENGTH; |
|
/* |
|
* Create the OCTET STRING manually by writing out the header and |
|
* appending the content octets. This avoids an extra memory allocation |
|
* operation in some cases. Applications should *NOT* do this because it |
|
* relies on library internals. |
|
*/ |
|
os.length = ASN1_object_size(0, len, V_ASN1_OCTET_STRING); |
|
os.data = OPENSSL_malloc(os.length); |
|
if (os.data == NULL) |
|
goto err; |
|
tmpval = os.data; |
|
ASN1_put_object(&tmpval, 0, len, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL); |
|
if (val) |
|
memcpy(tmpval, val, len); |
|
else if (RAND_bytes(tmpval, len) <= 0) |
|
goto err; |
|
if (!X509V3_add1_i2d(exts, NID_id_pkix_OCSP_Nonce, |
|
&os, 0, X509V3_ADD_REPLACE)) |
|
goto err; |
|
ret = 1; |
|
err: |
|
if (os.data) |
|
OPENSSL_free(os.data); |
|
return ret; |
|
} |
|
|
|
/* Add nonce to an OCSP request */ |
|
|
|
int OCSP_request_add1_nonce(OCSP_REQUEST *req, unsigned char *val, int len) |
|
{ |
|
return ocsp_add1_nonce(&req->tbsRequest->requestExtensions, val, len); |
|
} |
|
|
|
/* Same as above but for a response */ |
|
|
|
int OCSP_basic_add1_nonce(OCSP_BASICRESP *resp, unsigned char *val, int len) |
|
{ |
|
return ocsp_add1_nonce(&resp->tbsResponseData->responseExtensions, val, |
|
len); |
|
} |
|
|
|
/*- |
|
* Check nonce validity in a request and response. |
|
* Return value reflects result: |
|
* 1: nonces present and equal. |
|
* 2: nonces both absent. |
|
* 3: nonce present in response only. |
|
* 0: nonces both present and not equal. |
|
* -1: nonce in request only. |
|
* |
|
* For most responders clients can check return > 0. |
|
* If responder doesn't handle nonces return != 0 may be |
|
* necessary. return == 0 is always an error. |
|
*/ |
|
|
|
int OCSP_check_nonce(OCSP_REQUEST *req, OCSP_BASICRESP *bs) |
|
{ |
|
/* |
|
* Since we are only interested in the presence or absence of |
|
* the nonce and comparing its value there is no need to use |
|
* the X509V3 routines: this way we can avoid them allocating an |
|
* ASN1_OCTET_STRING structure for the value which would be |
|
* freed immediately anyway. |
|
*/ |
|
|
|
int req_idx, resp_idx; |
|
X509_EXTENSION *req_ext, *resp_ext; |
|
req_idx = OCSP_REQUEST_get_ext_by_NID(req, NID_id_pkix_OCSP_Nonce, -1); |
|
resp_idx = OCSP_BASICRESP_get_ext_by_NID(bs, NID_id_pkix_OCSP_Nonce, -1); |
|
/* Check both absent */ |
|
if ((req_idx < 0) && (resp_idx < 0)) |
|
return 2; |
|
/* Check in request only */ |
|
if ((req_idx >= 0) && (resp_idx < 0)) |
|
return -1; |
|
/* Check in response but not request */ |
|
if ((req_idx < 0) && (resp_idx >= 0)) |
|
return 3; |
|
/* |
|
* Otherwise nonce in request and response so retrieve the extensions |
|
*/ |
|
req_ext = OCSP_REQUEST_get_ext(req, req_idx); |
|
resp_ext = OCSP_BASICRESP_get_ext(bs, resp_idx); |
|
if (ASN1_OCTET_STRING_cmp(req_ext->value, resp_ext->value)) |
|
return 0; |
|
return 1; |
|
} |
|
|
|
/* |
|
* Copy the nonce value (if any) from an OCSP request to a response. |
|
*/ |
|
|
|
int OCSP_copy_nonce(OCSP_BASICRESP *resp, OCSP_REQUEST *req) |
|
{ |
|
X509_EXTENSION *req_ext; |
|
int req_idx; |
|
/* Check for nonce in request */ |
|
req_idx = OCSP_REQUEST_get_ext_by_NID(req, NID_id_pkix_OCSP_Nonce, -1); |
|
/* If no nonce that's OK */ |
|
if (req_idx < 0) |
|
return 2; |
|
req_ext = OCSP_REQUEST_get_ext(req, req_idx); |
|
return OCSP_BASICRESP_add_ext(resp, req_ext, -1); |
|
} |
|
|
|
X509_EXTENSION *OCSP_crlID_new(char *url, long *n, char *tim) |
|
{ |
|
X509_EXTENSION *x = NULL; |
|
OCSP_CRLID *cid = NULL; |
|
|
|
if (!(cid = OCSP_CRLID_new())) |
|
goto err; |
|
if (url) { |
|
if (!(cid->crlUrl = ASN1_IA5STRING_new())) |
|
goto err; |
|
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; |
|
}
|
|
|