518 lines
		
	
	
		
			16 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
			
		
		
	
	
			518 lines
		
	
	
		
			16 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
/* ocsp_ext.c */
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/* Written by Tom Titchener <Tom_Titchener@groove.net> for the OpenSSL
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 * project. */
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/* History:
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   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
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   as a patch kit. */
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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(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, int lastpos)
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	{
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	return(X509v3_get_ext_by_OBJ(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(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, 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) != 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(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, 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(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, int lastpos)
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	{
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	return(X509v3_get_ext_by_OBJ(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, int lastpos)
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	{
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	return(X509v3_get_ext_by_critical(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, int *idx)
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	{
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	return X509V3_get_d2i(x->tbsResponseData->responseExtensions, nid, crit, idx);
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	}
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int OCSP_BASICRESP_add1_ext_i2d(OCSP_BASICRESP *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->tbsResponseData->responseExtensions, nid, 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) != 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, 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, 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, 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, int crit,
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							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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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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	        {
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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;
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	        if (i2d(data, &p) <= 0) goto err;
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		}
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	else if (sk)
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	        {
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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) 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,
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						IS_SEQUENCE)<=0) goto err;
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		}
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	else
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		{
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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())) goto err;
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	if (!(ASN1_STRING_set(s, b, i))) 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) OPENSSL_free(b);
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	return NULL;
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	}
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/* Nonce handling functions */
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/* Add a nonce to an extension stack. A nonce can be specificed or if NULL
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 * a random nonce will be generated.
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 * Note: OpenSSL 0.9.7d and later create an OCTET STRING containing the 
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 * 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, 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) len = OCSP_DEFAULT_NONCE_LENGTH;
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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
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         * it 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
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		RAND_pseudo_bytes(tmpval, len);
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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, len);
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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);
 | 
						|
	/* 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;
 | 
						|
	}
 | 
						|
 |