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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 16:51:28 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 16:51:28 +0000 |
commit | 940b4d1848e8c70ab7642901a68594e8016caffc (patch) | |
tree | eb72f344ee6c3d9b80a7ecc079ea79e9fba8676d /xmlsecurity/source/xmlsec/saxhelper.cxx | |
parent | Initial commit. (diff) | |
download | libreoffice-upstream.tar.xz libreoffice-upstream.zip |
Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'xmlsecurity/source/xmlsec/saxhelper.cxx')
-rw-r--r-- | xmlsecurity/source/xmlsec/saxhelper.cxx | 361 |
1 files changed, 361 insertions, 0 deletions
diff --git a/xmlsecurity/source/xmlsec/saxhelper.cxx b/xmlsecurity/source/xmlsec/saxhelper.cxx new file mode 100644 index 000000000..f34766666 --- /dev/null +++ b/xmlsecurity/source/xmlsec/saxhelper.cxx @@ -0,0 +1,361 @@ +/* -*- 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 <rtl/ustring.hxx> + +#include <xmlsec/saxhelper.hxx> +#include <libxml/parserInternals.h> + +#include <com/sun/star/xml/csax/XMLAttribute.hpp> +#include <com/sun/star/uno/Sequence.hxx> + +#ifndef XMLSEC_NO_XSLT +#include "libxslt/xslt.h" +#endif + +/** + * The return value is NULL terminated. The application has the responsibility to + * deallocate the return value. + */ +static xmlChar* ous_to_xmlstr( const OUString& oustr ) +{ + OString ostr = OUStringToOString( oustr , RTL_TEXTENCODING_UTF8 ) ; + return xmlStrndup( reinterpret_cast<xmlChar const *>(ostr.getStr()), static_cast<int>(ostr.getLength()) ) ; +} + +/** + * The return value is NULL terminated. The application has the responsibility to + * deallocate the return value. + */ +static xmlChar* ous_to_nxmlstr( const OUString& oustr, int& length ) +{ + OString ostr = OUStringToOString( oustr , RTL_TEXTENCODING_UTF8 ) ; + length = ostr.getLength(); + + return xmlStrndup( reinterpret_cast<xmlChar const *>(ostr.getStr()), length ) ; +} + +/** + * The return value and the referenced value must be NULL terminated. + * The application has the responsibility to deallocate the return value. + */ +static const xmlChar** attrlist_to_nxmlstr( const css::uno::Sequence< css::xml::csax::XMLAttribute >& aAttributes ) +{ + xmlChar* attname = nullptr ; + xmlChar* attvalue = nullptr ; + const xmlChar** attrs = nullptr ; + + sal_Int32 nLength = aAttributes.getLength(); + + if( nLength != 0 ) + { + attrs = static_cast<const xmlChar**>(xmlMalloc( ( nLength * 2 + 2 ) * sizeof( xmlChar* ) )); + } + else + { + return nullptr ; + } + + int i = 0; + for( const auto& rAttr : aAttributes ) + { + attname = ous_to_xmlstr( rAttr.sName ) ; + attvalue = ous_to_xmlstr( rAttr.sValue ) ; + + if( attname != nullptr && attvalue != nullptr ) + { + attrs[i++] = attname ; + attrs[i++] = attvalue ; + attrs[i] = nullptr ; + attrs[i+1] = nullptr ; + } + else + { + if( attname != nullptr ) + xmlFree( attname ) ; + if( attvalue != nullptr ) + xmlFree( attvalue ) ; + } + } + + return attrs ; +} + +/** + * Constructor + * + * In this constructor, a libxml sax parser context is initialized. a libxml + * default sax handler is initialized with the context. + */ +SAXHelper::SAXHelper( ) + : m_pParserCtxt( nullptr ), + m_pSaxHandler( nullptr ) +{ + xmlInitParser() ; + LIBXML_TEST_VERSION ; + + /* + * compile error: + * xmlLoadExtDtdDefaultValue = XML_DETECT_IDS | XML_COMPLETE_ATTRS ; + */ + xmlSubstituteEntitiesDefault(0) ; + +#ifndef XMLSEC_NO_XSLT + xmlIndentTreeOutput = 1 ; +#endif /* XMLSEC_NO_XSLT */ + + m_pParserCtxt = xmlNewParserCtxt() ; + + if( m_pParserCtxt == nullptr ) + { +// see issue i74334, we cannot call xmlCleanupParser when libxml is still used +// in other parts of the office. +// xmlCleanupParser() ; +// and neither can we call xsltCleanupGlobals() + throw css::uno::RuntimeException() ; + } + + xmlSAXVersion(m_pParserCtxt->sax, 1); + + if (m_pParserCtxt->inputTab != nullptr) + { + m_pParserCtxt->inputTab[0] = nullptr ; + } + + if( m_pParserCtxt->sax == nullptr ) + { + xmlFreeParserCtxt( m_pParserCtxt ) ; + +// see issue i74334, we cannot call xmlCleanupParser when libxml is still used +// in other parts of the office. +// xmlCleanupParser() ; +// and neither can we call xsltCleanupGlobals() + m_pParserCtxt = nullptr ; + throw css::uno::RuntimeException() ; + } + else + { + m_pSaxHandler = m_pParserCtxt->sax ; + + //Adjust the context + m_pParserCtxt->recovery = 1 ; + } +} + +/** + * Destructor + * + * In this destructor, a libxml sax parser context is destructed. The XML tree + * in the context is not deallocated because the tree is bind with a document + * model by the setTargetDocument method, which delegate the target document to + * destruct the xml tree. + */ +SAXHelper::~SAXHelper() { + if( m_pParserCtxt != nullptr ) + { + /* + * In the situation that no object refer the Document, this destructor + * must deallocate the Document memory + */ + if( m_pSaxHandler == m_pParserCtxt->sax ) + { + m_pSaxHandler = nullptr ; + } + + xmlFreeParserCtxt( m_pParserCtxt ) ; + m_pParserCtxt = nullptr ; + } + + if( m_pSaxHandler != nullptr ) + { + xmlFree( m_pSaxHandler ) ; + m_pSaxHandler = nullptr ; + } +// see issue i74334, we cannot call xmlCleanupParser when libxml is still used +// in other parts of the office. +// xmlCleanupParser() ; +} + + +void SAXHelper::setCurrentNode(const xmlNodePtr pNode) +{ + /* + * This is really a black trick. + * When the current node is replaced, the nodeTab + * stack's top has to been replaced with the same + * node, in order to make compatibility. + */ + m_pParserCtxt->nodeTab[m_pParserCtxt->nodeNr - 1] + = m_pParserCtxt->node + = pNode; +} + + +/** + * XDocumentHandler -- start an xml document + */ +void SAXHelper::startDocument() +{ + if( m_pParserCtxt == nullptr) + { + throw css::uno::RuntimeException() ; + } + /* + * Adjust inputTab + */ + xmlParserInputPtr pInput = xmlNewInputStream( m_pParserCtxt ) ; + + if( m_pParserCtxt->inputTab != nullptr && m_pParserCtxt->inputMax != 0 ) + { + m_pParserCtxt->inputTab[0] = pInput ; + m_pParserCtxt->input = pInput ; + } + + m_pSaxHandler->startDocument( m_pParserCtxt ) ; + + if( m_pParserCtxt->myDoc == nullptr ) + { + throw css::uno::RuntimeException() ; + } +} + +/** + * XDocumentHandler -- end an xml document + */ +void SAXHelper::endDocument() +{ + m_pSaxHandler->endDocument( m_pParserCtxt ) ; +} + +/** + * XDocumentHandler -- start an xml element + */ +void SAXHelper::startElement( + const OUString& aName, + const css::uno::Sequence< css::xml::csax::XMLAttribute >& aAttributes ) +{ + const xmlChar* fullName = nullptr ; + const xmlChar** attrs = nullptr ; + + fullName = ous_to_xmlstr( aName ) ; + attrs = attrlist_to_nxmlstr( aAttributes ) ; + + if( fullName != nullptr || attrs != nullptr ) + { + m_pSaxHandler->startElement( m_pParserCtxt , fullName , attrs ) ; + } + + if( fullName != nullptr ) + { + xmlFree( const_cast<xmlChar*>(fullName) ) ; + fullName = nullptr ; + } + + if( attrs != nullptr ) + { + for( int i = 0 ; attrs[i] != nullptr ; ++i ) + { + xmlFree( const_cast<xmlChar*>(attrs[i]) ) ; + attrs[i] = nullptr ; + } + + xmlFree( static_cast<void*>(attrs) ) ; + attrs = nullptr ; + } +} + +/** + * XDocumentHandler -- end an xml element + */ +void SAXHelper::endElement( const OUString& aName ) +{ + xmlChar* fullname = ous_to_xmlstr( aName ) ; + m_pSaxHandler->endElement( m_pParserCtxt , fullname ) ; + + if( fullname != nullptr ) + { + xmlFree( fullname ) ; + fullname = nullptr ; + } +} + +/** + * XDocumentHandler -- an xml element or cdata characters + */ +void SAXHelper::characters( const OUString& aChars ) +{ + const xmlChar* chars = nullptr ; + int length = 0 ; + + chars = ous_to_nxmlstr( aChars, length ) ; + m_pSaxHandler->characters( m_pParserCtxt , chars , length ) ; + + if( chars != nullptr ) + { + xmlFree( const_cast<xmlChar*>(chars) ) ; + } +} + +/** + * XDocumentHandler -- ignorable xml white space + */ +void SAXHelper::ignorableWhitespace( const OUString& aWhitespaces ) +{ + const xmlChar* chars = nullptr ; + int length = 0 ; + + chars = ous_to_nxmlstr( aWhitespaces, length ) ; + m_pSaxHandler->ignorableWhitespace( m_pParserCtxt , chars , length ) ; + + if( chars != nullptr ) + { + xmlFree( const_cast<xmlChar*>(chars) ) ; + } +} + +/** + * XDocumentHandler -- preprocessing instruction + */ +void SAXHelper::processingInstruction( + const OUString& aTarget, + const OUString& aData ) +{ + xmlChar* target = nullptr ; + xmlChar* data = nullptr ; + + target = ous_to_xmlstr( aTarget ) ; + data = ous_to_xmlstr( aData ) ; + + m_pSaxHandler->processingInstruction( m_pParserCtxt , target , data ) ; + + if( target != nullptr ) + { + xmlFree( target ) ; + target = nullptr ; + } + + if( data != nullptr ) + { + xmlFree( data ) ; + data = nullptr ; + } +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |