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