xmlsecurity/source/helper/UriBindingHelper.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <UriBindingHelper.hxx>
  21
  22 #include <tools/stream.hxx>
  23 #include <unotools/streamwrap.hxx>
  24
  25 #include <com/sun/star/embed/XStorage.hpp>
  26 #include <com/sun/star/embed/ElementModes.hpp>
  27 #include <osl/diagnose.h>
  28 #include <rtl/uri.hxx>
  29 #include <sal/log.hxx>
  30
  31 #include <documentsignaturehelper.hxx>
  32
  33 using namespace com::sun::star;
  34
  35 // XUriBinding
  36
  37 UriBindingHelper::UriBindingHelper()
  38 {
  39 }
  40
  41 UriBindingHelper::UriBindingHelper( const css::uno::Reference < css::embed::XStorage >& rxStorage, const uno::Reference<io::XStream>& xScriptingSignatureStream )
  42 {
  43     mxStorage = rxStorage;
  44     mxScriptingSignatureStream = xScriptingSignatureStream;
  45 }
  46
  47 void SAL_CALL UriBindingHelper::setUriBinding( const OUString& /*uri*/, const uno::Reference< io::XInputStream >&)
  48 {
  49 }
  50
  51 uno::Reference< io::XInputStream > SAL_CALL UriBindingHelper::getUriBinding( const OUString& uri )
  52 {
  53     uno::Reference< io::XInputStream > xInputStream;
  54     if ( mxStorage.is() )
  55     {
  56         xInputStream = OpenInputStream( mxStorage, uri, mxScriptingSignatureStream );
  57     }
  58     else
  59     {
  60         std::unique_ptr<SvFileStream> pStream(new SvFileStream( uri, StreamMode::READ ));
  61         xInputStream = new utl::OInputStreamWrapper( std::move(pStream) );
  62     }
  63     return xInputStream;
  64 }
  65
  66 uno::Reference < io::XInputStream > UriBindingHelper::OpenInputStream( const uno::Reference < embed::XStorage >& rxStore, const OUString& rURI, const css::uno::Reference<css::io::XStream>& xScriptingSignatureStream )
  67 {
  68     OSL_ASSERT(!rURI.isEmpty());
  69     uno::Reference < io::XInputStream > xInStream;
  70
  71     OUString aURI(rURI);
  72     // Ignore leading slash, don't attempt to open a storage with name "".
  73     if (aURI.startsWith("/"))
  74         aURI = aURI.copy(1);
  75     // Ignore query part of the URI.
  76     sal_Int32 nQueryPos = aURI.indexOf('?');
  77     if (nQueryPos != -1)
  78         aURI = aURI.copy(0, nQueryPos);
  79
  80
  81     sal_Int32 nSepPos = aURI.indexOf( '/' );
  82     if ( nSepPos == -1 )
  83     {
  84         // Cloning because of I can't keep all storage references open
  85         // MBA with think about a better API...
  86         const OUString sName = ::rtl::Uri::decode(
  87             aURI, rtl_UriDecodeStrict, rtl_UriCharClassRelSegment);
  88         if (sName.isEmpty() && !aURI.isEmpty())
  89             throw uno::Exception(u"Could not decode URI for stream element."_ustr, nullptr);
  90
  91         uno::Reference< io::XStream > xStream;
  92         if (!rxStore->hasByName(sName))
  93         {
  94             if (xScriptingSignatureStream.is() && sName == DocumentSignatureHelper::GetScriptingContentSignatureDefaultStreamName())
  95             {
  96                 xStream = xScriptingSignatureStream;
  97                 uno::Reference<io::XSeekable> xSeekable(xScriptingSignatureStream, uno::UNO_QUERY);
  98                 if (xSeekable.is())
  99                 {
 100                     // Cloned streams are always positioned at the start, do the same in the overlay
 101                     // case.
 102                     xSeekable->seek(0);
 103                 }
 104             }
 105             else
 106             {
 107                 SAL_WARN("xmlsecurity.helper", "expected stream, but not found: " << sName);
 108             }
 109         }
 110         else
 111             xStream = rxStore->cloneStreamElement( sName );
 112         if ( !xStream.is() )
 113             throw uno::RuntimeException();
 114         xInStream = xStream->getInputStream();
 115     }
 116     else
 117     {
 118         const OUString aStoreName = ::rtl::Uri::decode(
 119             aURI.copy( 0, nSepPos ), rtl_UriDecodeStrict, rtl_UriCharClassRelSegment);
 120         if (aStoreName.isEmpty() && !aURI.isEmpty())
 121             throw uno::Exception(u"Could not decode URI for stream element."_ustr, nullptr);
 122
 123         OUString aElement = aURI.copy( nSepPos+1 );
 124         uno::Reference < embed::XStorage > xSubStore = rxStore->openStorageElement( aStoreName, embed::ElementModes::READ );
 125         xInStream = OpenInputStream( xSubStore, aElement, xScriptingSignatureStream );
 126     }
 127     return xInStream;
 128 }
 129
 130 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */