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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <sal/config.h>
#include <sal/log.hxx>
#include <rtl/uuid.h>
#include <xmlsec-wrapper.h>
#include <xmlsec/mscng/x509.h>
#include <com/sun/star/xml/crypto/SecurityOperationStatus.hpp>
#include <com/sun/star/xml/crypto/XXMLSignature.hpp>
#include "securityenvironment_mscryptimpl.hxx"
#include <xmlsec/xmldocumentwrapper_xmlsecimpl.hxx>
#include <xmlelementwrapper_xmlsecimpl.hxx>
#include <xmlsec/xmlstreamio.hxx>
#include <xmlsec/errorcallback.hxx>
#include <cppuhelper/supportsservice.hxx>
using namespace ::com::sun::star;
using namespace ::com::sun::star::uno ;
using namespace ::com::sun::star::lang ;
using ::com::sun::star::lang::XMultiServiceFactory ;
using ::com::sun::star::lang::XSingleServiceFactory ;
using ::com::sun::star::xml::wrapper::XXMLElementWrapper ;
using ::com::sun::star::xml::wrapper::XXMLDocumentWrapper ;
using ::com::sun::star::xml::crypto::XSecurityEnvironment ;
using ::com::sun::star::xml::crypto::XXMLSignature ;
using ::com::sun::star::xml::crypto::XXMLSignatureTemplate ;
using ::com::sun::star::xml::crypto::XXMLSecurityContext ;
using ::com::sun::star::xml::crypto::XUriBinding ;
namespace {
class XMLSignature_MSCryptImpl : public ::cppu::WeakImplHelper<
css::xml::crypto::XXMLSignature ,
css::lang::XServiceInfo >
{
public:
explicit XMLSignature_MSCryptImpl();
//Methods from XXMLSignature
virtual css::uno::Reference< css::xml::crypto::XXMLSignatureTemplate > SAL_CALL generate(
const css::uno::Reference< css::xml::crypto::XXMLSignatureTemplate >& aTemplate ,
const css::uno::Reference< css::xml::crypto::XSecurityEnvironment >& aEnvironment
) override;
virtual css::uno::Reference< css::xml::crypto::XXMLSignatureTemplate > SAL_CALL validate(
const css::uno::Reference< css::xml::crypto::XXMLSignatureTemplate >& aTemplate ,
const css::uno::Reference< css::xml::crypto::XXMLSecurityContext >& aContext
) override;
//Methods from XServiceInfo
virtual OUString SAL_CALL getImplementationName() override;
virtual sal_Bool SAL_CALL supportsService(
const OUString& ServiceName
) override;
virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
} ;
}
XMLSignature_MSCryptImpl::XMLSignature_MSCryptImpl() {
}
/* XXMLSignature */
Reference< XXMLSignatureTemplate >
SAL_CALL XMLSignature_MSCryptImpl::generate(
const Reference< XXMLSignatureTemplate >& aTemplate ,
const Reference< XSecurityEnvironment >& aEnvironment
)
{
xmlSecKeysMngrPtr pMngr = nullptr ;
xmlSecDSigCtxPtr pDsigCtx = nullptr ;
xmlNodePtr pNode = nullptr ;
if( !aTemplate.is() )
throw RuntimeException() ;
if( !aEnvironment.is() )
throw RuntimeException() ;
//Get Keys Manager
Reference< XUnoTunnel > xSecTunnel( aEnvironment , UNO_QUERY_THROW ) ;
SecurityEnvironment_MSCryptImpl* pSecEnv = comphelper::getFromUnoTunnel<SecurityEnvironment_MSCryptImpl>(xSecTunnel);
if( pSecEnv == nullptr )
throw RuntimeException() ;
//Get the xml node
Reference< XXMLElementWrapper > xElement = aTemplate->getTemplate() ;
if( !xElement.is() ) {
throw RuntimeException() ;
}
Reference< XUnoTunnel > xNodTunnel( xElement , UNO_QUERY_THROW ) ;
XMLElementWrapper_XmlSecImpl* pElement = comphelper::getFromUnoTunnel<XMLElementWrapper_XmlSecImpl>(xNodTunnel);
if( pElement == nullptr ) {
throw RuntimeException() ;
}
pNode = pElement->getNativeElement() ;
//Get the stream/URI binding
Reference< XUriBinding > xUriBinding = aTemplate->getBinding() ;
if( xUriBinding.is() ) {
//Register the stream input callbacks into libxml2
if( xmlRegisterStreamInputCallbacks( xUriBinding ) < 0 )
throw RuntimeException() ;
}
setErrorRecorder( );
pMngr = pSecEnv->createKeysManager();
if( !pMngr ) {
throw RuntimeException() ;
}
//Create Signature context
pDsigCtx = xmlSecDSigCtxCreate( pMngr ) ;
if( pDsigCtx == nullptr )
{
//throw XMLSignatureException() ;
SecurityEnvironment_MSCryptImpl::destroyKeysManager( pMngr );
clearErrorRecorder();
return aTemplate;
}
//Sign the template
if( xmlSecDSigCtxSign( pDsigCtx , pNode ) == 0 )
{
if (pDsigCtx->status == xmlSecDSigStatusSucceeded)
aTemplate->setStatus(css::xml::crypto::SecurityOperationStatus_OPERATION_SUCCEEDED);
else
aTemplate->setStatus(css::xml::crypto::SecurityOperationStatus_UNKNOWN);
}
else
{
aTemplate->setStatus(css::xml::crypto::SecurityOperationStatus_UNKNOWN);
}
xmlSecDSigCtxDestroy( pDsigCtx ) ;
SecurityEnvironment_MSCryptImpl::destroyKeysManager( pMngr );
//Unregistered the stream/URI binding
if( xUriBinding.is() )
xmlUnregisterStreamInputCallbacks() ;
clearErrorRecorder();
return aTemplate ;
}
/* XXMLSignature */
Reference< XXMLSignatureTemplate >
SAL_CALL XMLSignature_MSCryptImpl::validate(
const Reference< XXMLSignatureTemplate >& aTemplate ,
const Reference< XXMLSecurityContext >& aSecurityCtx
) {
xmlSecKeysMngrPtr pMngr = nullptr ;
xmlSecDSigCtxPtr pDsigCtx = nullptr ;
xmlNodePtr pNode = nullptr ;
if( !aTemplate.is() )
throw RuntimeException() ;
if( !aSecurityCtx.is() )
throw RuntimeException() ;
//Get Keys Manager
Reference< XSecurityEnvironment > xSecEnv
= aSecurityCtx->getSecurityEnvironmentByIndex(
aSecurityCtx->getDefaultSecurityEnvironmentIndex());
Reference< XUnoTunnel > xSecTunnel( xSecEnv , UNO_QUERY_THROW ) ;
SecurityEnvironment_MSCryptImpl* pSecEnv = comphelper::getFromUnoTunnel<SecurityEnvironment_MSCryptImpl>(xSecTunnel);
if( pSecEnv == nullptr )
throw RuntimeException() ;
//Get the xml node
Reference< XXMLElementWrapper > xElement = aTemplate->getTemplate() ;
if( !xElement.is() )
throw RuntimeException() ;
Reference< XUnoTunnel > xNodTunnel( xElement , UNO_QUERY_THROW ) ;
XMLElementWrapper_XmlSecImpl* pElement = comphelper::getFromUnoTunnel<XMLElementWrapper_XmlSecImpl>(xNodTunnel);
if( pElement == nullptr )
throw RuntimeException() ;
pNode = pElement->getNativeElement() ;
//Get the stream/URI binding
Reference< XUriBinding > xUriBinding = aTemplate->getBinding() ;
if( xUriBinding.is() ) {
//Register the stream input callbacks into libxml2
if( xmlRegisterStreamInputCallbacks( xUriBinding ) < 0 )
throw RuntimeException() ;
}
setErrorRecorder( );
pMngr = pSecEnv->createKeysManager();
if( !pMngr ) {
throw RuntimeException() ;
}
//Create Signature context
pDsigCtx = xmlSecDSigCtxCreate( pMngr ) ;
if( pDsigCtx == nullptr )
{
SecurityEnvironment_MSCryptImpl::destroyKeysManager( pMngr );
clearErrorRecorder();
return aTemplate;
}
// We do certificate verification ourselves.
pDsigCtx->keyInfoReadCtx.flags |= XMLSEC_KEYINFO_FLAGS_X509DATA_DONT_VERIFY_CERTS;
// limit possible key data to valid X509 certificates only, no KeyValues
if (xmlSecPtrListAdd(&(pDsigCtx->keyInfoReadCtx.enabledKeyData), BAD_CAST xmlSecMSCngKeyDataX509GetKlass()) < 0)
throw RuntimeException("failed to limit allowed key data");
//Verify signature
//The documentation says that the signature is only valid if the return value is 0 (that is, not < 0)
//AND pDsigCtx->status == xmlSecDSigStatusSucceeded. That is, we must not make any assumptions, if
//the return value is < 0. Then we must regard the signature as INVALID. We cannot use the
//error recorder feature to get the ONE error that made the verification fail, because there is no
//documentation/specification as to how to interpret the number of recorded errors and what is the initial
//error.
int rs = xmlSecDSigCtxVerify(pDsigCtx , pNode);
// Also verify manifest: this is empty for ODF, but contains everything (except signature metadata) for OOXML.
xmlSecSize nReferenceCount = xmlSecPtrListGetSize(&pDsigCtx->manifestReferences);
// Require that all manifest references are also good.
xmlSecSize nReferenceGood = 0;
for (xmlSecSize nReference = 0; nReference < nReferenceCount; ++nReference)
{
xmlSecDSigReferenceCtxPtr pReference = static_cast<xmlSecDSigReferenceCtxPtr>(xmlSecPtrListGetItem(&pDsigCtx->manifestReferences, nReference));
if (pReference)
{
if (pReference->status == xmlSecDSigStatusSucceeded)
++nReferenceGood;
}
}
SAL_INFO("xmlsecurity.xmlsec", "xmlSecDSigCtxVerify status " << pDsigCtx->status << ", references good " << nReferenceGood << " of " << nReferenceCount);
if (rs == 0 && nReferenceCount == nReferenceGood)
{
if (pDsigCtx->status == xmlSecDSigStatusSucceeded)
aTemplate->setStatus(css::xml::crypto::SecurityOperationStatus_OPERATION_SUCCEEDED);
else
aTemplate->setStatus(css::xml::crypto::SecurityOperationStatus_UNKNOWN);
}
else
{
aTemplate->setStatus(css::xml::crypto::SecurityOperationStatus_UNKNOWN);
}
xmlSecDSigCtxDestroy( pDsigCtx ) ;
SecurityEnvironment_MSCryptImpl::destroyKeysManager( pMngr );
//Unregistered the stream/URI binding
if( xUriBinding.is() )
xmlUnregisterStreamInputCallbacks() ;
clearErrorRecorder();
return aTemplate;
}
/* XServiceInfo */
OUString SAL_CALL XMLSignature_MSCryptImpl::getImplementationName() {
return "com.sun.star.xml.crypto.XMLSignature";
}
/* XServiceInfo */
sal_Bool SAL_CALL XMLSignature_MSCryptImpl::supportsService( const OUString& serviceName) {
return cppu::supportsService(this, serviceName);
}
/* XServiceInfo */
Sequence< OUString > SAL_CALL XMLSignature_MSCryptImpl::getSupportedServiceNames() {
return { "com.sun.star.xml.crypto.XMLSignature" };
}
extern "C" SAL_DLLPUBLIC_EXPORT uno::XInterface*
com_sun_star_xml_crypto_XMLSignature_get_implementation(uno::XComponentContext* /*pCtx*/,
uno::Sequence<uno::Any> const& /*rSeq*/)
{
return cppu::acquire(new XMLSignature_MSCryptImpl);
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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