xmloff/source/draw/SignatureLineContext.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
   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
  10 #include "SignatureLineContext.hxx"
  11
  12 #include <com/sun/star/beans/XPropertySet.hpp>
  13 #include <com/sun/star/embed/XStorage.hpp>
  14 #include <com/sun/star/frame/XModel.hpp>
  15 #include <com/sun/star/frame/XStorable.hpp>
  16 #include <com/sun/star/graphic/XGraphic.hpp>
  17 #include <com/sun/star/security/DocumentDigitalSignatures.hpp>
  18 #include <com/sun/star/security/XDocumentDigitalSignatures.hpp>
  19 #include <com/sun/star/xml/sax/XAttributeList.hpp>
  20
  21 #include <sal/log.hxx>
  22 #include <comphelper/processfactory.hxx>
  23 #include <comphelper/storagehelper.hxx>
  24 #include <xmloff/xmltoken.hxx>
  25 #include <xmloff/xmlimp.hxx>
  26 #include <xmloff/xmlnamespace.hxx>
  27
  28 using namespace css;
  29 using namespace css::xml::sax;
  30 using namespace css::uno;
  31 using namespace css::drawing;
  32 using namespace css::embed;
  33 using namespace css::frame;
  34 using namespace css::io;
  35 using namespace css::graphic;
  36 using namespace css::security;
  37 using namespace xmloff::token;
  38
  39 SignatureLineContext::SignatureLineContext(SvXMLImport& rImport, sal_Int32 /*nElement*/,
  40                                            const Reference<XFastAttributeList>& xAttrList,
  41                                            const Reference<XShape>& rxShape)
  42     : SvXMLImportContext(rImport)
  43 {
  44     Reference<beans::XPropertySet> xPropSet(rxShape, UNO_QUERY_THROW);
  45
  46     xPropSet->setPropertyValue("IsSignatureLine", Any(true));
  47
  48     xPropSet->setPropertyValue("SignatureLineId",
  49                                Any(xAttrList->getOptionalValue(XML_ELEMENT(LO_EXT, XML_ID))));
  50     xPropSet->setPropertyValue(
  51         "SignatureLineSuggestedSignerName",
  52         Any(xAttrList->getOptionalValue(XML_ELEMENT(LO_EXT, XML_SUGGESTED_SIGNER_NAME))));
  53     xPropSet->setPropertyValue(
  54         "SignatureLineSuggestedSignerTitle",
  55         Any(xAttrList->getOptionalValue(XML_ELEMENT(LO_EXT, XML_SUGGESTED_SIGNER_TITLE))));
  56     xPropSet->setPropertyValue(
  57         "SignatureLineSuggestedSignerEmail",
  58         Any(xAttrList->getOptionalValue(XML_ELEMENT(LO_EXT, XML_SUGGESTED_SIGNER_EMAIL))));
  59     xPropSet->setPropertyValue(
  60         "SignatureLineSigningInstructions",
  61         Any(xAttrList->getOptionalValue(XML_ELEMENT(LO_EXT, XML_SIGNING_INSTRUCTIONS))));
  62
  63     bool bShowSignDate = xAttrList->getOptionalValue(XML_ELEMENT(LO_EXT, XML_SHOW_SIGN_DATE))
  64                          == GetXMLToken(XML_TRUE);
  65     bool bCanAddComment = xAttrList->getOptionalValue(XML_ELEMENT(LO_EXT, XML_CAN_ADD_COMMENT))
  66                           == GetXMLToken(XML_TRUE);
  67     xPropSet->setPropertyValue("SignatureLineShowSignDate", Any(bShowSignDate));
  68     xPropSet->setPropertyValue("SignatureLineCanAddComment", Any(bCanAddComment));
  69
  70     // Save unsigned graphic (need it when exporting)
  71     Reference<XGraphic> xUnsignedGraphic;
  72     xPropSet->getPropertyValue("Graphic") >>= xUnsignedGraphic;
  73     if (xUnsignedGraphic.is())
  74         xPropSet->setPropertyValue("SignatureLineUnsignedImage", Any(xUnsignedGraphic));
  75
  76     Reference<XGraphic> xGraphic;
  77     try
  78     {
  79         // Get the document signatures
  80         css::uno::Reference<XStorable> xStorable(GetImport().GetModel(), UNO_QUERY_THROW);
  81         Reference<XStorage> xStorage = comphelper::OStorageHelper::GetStorageOfFormatFromURL(
  82             ZIP_STORAGE_FORMAT_STRING, xStorable->getLocation(), ElementModes::READ);
  83
  84         if (!xStorage.is())
  85         {
  86             SAL_WARN("xmloff", "No xStorage!");
  87             return;
  88         }
  89
  90         OUString const aODFVersion(comphelper::OStorageHelper::GetODFVersionFromStorage(xStorage));
  91         Reference<XDocumentDigitalSignatures> xSignatures(
  92             security::DocumentDigitalSignatures::createWithVersion(
  93                 comphelper::getProcessComponentContext(), aODFVersion));
  94
  95         const Sequence<DocumentSignatureInformation> xSignatureInfo
  96             = xSignatures->verifyDocumentContentSignatures(xStorage, Reference<XInputStream>());
  97
  98         // Try to find matching signature line image - if none exists that is fine,
  99         // then the signature line is not digitally signed.
 100         auto pSignatureInfo
 101             = std::find_if(xSignatureInfo.begin(), xSignatureInfo.end(),
 102                            [&xAttrList](const DocumentSignatureInformation& rSignatureInfo) {
 103                                return rSignatureInfo.SignatureLineId
 104                                       == xAttrList->getOptionalValue(XML_ELEMENT(LO_EXT, XML_ID));
 105                            });
 106         bool bIsSigned(false);
 107         if (pSignatureInfo != xSignatureInfo.end())
 108         {
 109             bIsSigned = true;
 110             if (pSignatureInfo->SignatureIsValid)
 111             {
 112                 // Signature is valid, use the 'valid' image
 113                 SAL_WARN_IF(!pSignatureInfo->ValidSignatureLineImage.is(), "xmloff",
 114                             "No ValidSignatureLineImage!");
 115                 xGraphic = pSignatureInfo->ValidSignatureLineImage;
 116             }
 117             else
 118             {
 119                 // Signature is invalid, use the 'invalid' image
 120                 SAL_WARN_IF(!pSignatureInfo->InvalidSignatureLineImage.is(), "xmloff",
 121                             "No InvalidSignatureLineImage!");
 122                 xGraphic = pSignatureInfo->InvalidSignatureLineImage;
 123             }
 124
 125             xPropSet->setPropertyValue("Graphic", Any(xGraphic));
 126         }
 127         xPropSet->setPropertyValue("SignatureLineIsSigned", Any(bIsSigned));
 128     }
 129     catch (css::uno::Exception&)
 130     {
 131         // DocumentDigitalSignatures service not available.
 132         // We render the "unsigned" shape instead.
 133     }
 134 }
 135
 136 /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */