/* -*- 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 <resourcemanager.hxx>

#include <digitalsignaturesdialog.hxx>
#include <certificatechooser.hxx>
#include <certificateviewer.hxx>
#include <macrosecurity.hxx>
#include <biginteger.hxx>
#include <strings.hrc>
#include <pdfsignaturehelper.hxx>
#include <sax/tools/converter.hxx>

#include <com/sun/star/embed/XStorage.hpp>
#include <com/sun/star/embed/StorageFormats.hpp>
#include <com/sun/star/embed/XTransactedObject.hpp>
#include <com/sun/star/embed/ElementModes.hpp>
#include <com/sun/star/ucb/XContent.hpp>
#include <com/sun/star/ucb/XContentIdentifierFactory.hpp>
#include <com/sun/star/ucb/XCommandEnvironment.hpp>
#include <com/sun/star/ucb/XCommandProcessor.hpp>
#include <com/sun/star/ucb/Command.hpp>
#include <com/sun/star/uno/SecurityException.hpp>
#include <vcl/weld.hxx>
#include <unotools/securityoptions.hxx>
#include <com/sun/star/security/CertificateValidity.hpp>
#include <com/sun/star/security/CertificateKind.hpp>
#include <comphelper/base64.hxx>
#include <comphelper/documentconstants.hxx>
#include <comphelper/propertyvalue.hxx>
#include <comphelper/sequence.hxx>
#include <comphelper/xmlsechelper.hxx>
#include <cppuhelper/supportsservice.hxx>
#include <sal/log.hxx>
#include <com/sun/star/lang/IllegalArgumentException.hpp>
#include <com/sun/star/security/XDocumentDigitalSignatures.hpp>
#include <com/sun/star/xml/crypto/XXMLSecurityContext.hpp>

using namespace css;
using namespace css::uno;
using namespace css::lang;
using namespace css::security;
using namespace css::xml::crypto;

class DocumentDigitalSignatures
    : public cppu::WeakImplHelper<css::security::XDocumentDigitalSignatures,
                                  css::lang::XInitialization, css::lang::XServiceInfo>
{
private:
    css::uno::Reference<css::uno::XComponentContext> mxCtx;
    /// will be set by XInitialization. If not we assume true. false means an earlier version (whatever that means,
    /// this is a string, not a boolean).
    /// Note that the code talks about "ODF version" even if this class is also used to sign OOXML.
    OUString m_sODFVersion;
    /// The number of arguments which were passed in XInitialization::initialize
    int m_nArgumentsCount;
    /// Indicates if the document already contains a document signature
    bool m_bHasDocumentSignature;

    /// @throws css::uno::RuntimeException
    bool ImplViewSignatures(const css::uno::Reference<css::embed::XStorage>& rxStorage,
                            const css::uno::Reference<css::io::XStream>& xSignStream,
                            DocumentSignatureMode eMode, bool bReadOnly);
    /// @throws css::uno::RuntimeException
    void ImplViewSignatures(const css::uno::Reference<css::embed::XStorage>& rxStorage,
                            const css::uno::Reference<css::io::XInputStream>& xSignStream,
                            DocumentSignatureMode eMode, bool bReadOnly);
    /// @throws css::uno::RuntimeException
    css::uno::Sequence<css::security::DocumentSignatureInformation>
    ImplVerifySignatures(const css::uno::Reference<css::embed::XStorage>& rxStorage,
                         const ::com::sun::star::uno::Reference<css::io::XInputStream>& xSignStream,
                         DocumentSignatureMode eMode);

    css::uno::Sequence<css::uno::Reference<css::security::XCertificate>>
    chooseCertificatesImpl(std::map<OUString, OUString>& rProperties, const UserAction eAction,
                           const CertificateKind certificateKind=CertificateKind_NONE);

public:
    explicit DocumentDigitalSignatures(
        const css::uno::Reference<css::uno::XComponentContext>& rxCtx);

    //XInitialization
    void SAL_CALL initialize(const css::uno::Sequence<css::uno::Any>& aArguments) override;

    OUString SAL_CALL getImplementationName() override;

    sal_Bool SAL_CALL supportsService(OUString const& ServiceName) override;

    css::uno::Sequence<OUString> SAL_CALL getSupportedServiceNames() override;

    // XDocumentDigitalSignatures
    sal_Bool SAL_CALL
    signDocumentContent(const css::uno::Reference<css::embed::XStorage>& xStorage,
                        const css::uno::Reference<css::io::XStream>& xSignStream) override;
    sal_Bool SAL_CALL signSignatureLine(
        const css::uno::Reference<css::embed::XStorage>& Storage,
        const css::uno::Reference<css::io::XStream>& xSignStream, const OUString& aSignatureLineId,
        const Reference<css::security::XCertificate>& xCertificate,
        const Reference<css::graphic::XGraphic>& xValidGraphic,
        const Reference<css::graphic::XGraphic>& xInvalidGraphic,
        const OUString& aComment) override;
    css::uno::Sequence<css::security::DocumentSignatureInformation>
        SAL_CALL verifyDocumentContentSignatures(
            const css::uno::Reference<css::embed::XStorage>& xStorage,
            const css::uno::Reference<css::io::XInputStream>& xSignInStream) override;
    void SAL_CALL showDocumentContentSignatures(
        const css::uno::Reference<css::embed::XStorage>& xStorage,
        const css::uno::Reference<css::io::XInputStream>& xSignInStream) override;
    OUString SAL_CALL getDocumentContentSignatureDefaultStreamName() override;
    sal_Bool SAL_CALL
    signScriptingContent(const css::uno::Reference<css::embed::XStorage>& xStorage,
                         const css::uno::Reference<css::io::XStream>& xSignStream) override;
    css::uno::Sequence<css::security::DocumentSignatureInformation>
        SAL_CALL verifyScriptingContentSignatures(
            const css::uno::Reference<css::embed::XStorage>& xStorage,
            const css::uno::Reference<css::io::XInputStream>& xSignInStream) override;
    void SAL_CALL showScriptingContentSignatures(
        const css::uno::Reference<css::embed::XStorage>& xStorage,
        const css::uno::Reference<css::io::XInputStream>& xSignInStream) override;
    OUString SAL_CALL getScriptingContentSignatureDefaultStreamName() override;
    sal_Bool SAL_CALL
    signPackage(const css::uno::Reference<css::embed::XStorage>& Storage,
                const css::uno::Reference<css::io::XStream>& xSignStream) override;
    css::uno::Sequence<css::security::DocumentSignatureInformation>
        SAL_CALL verifyPackageSignatures(
            const css::uno::Reference<css::embed::XStorage>& Storage,
            const css::uno::Reference<css::io::XInputStream>& xSignInStream) override;
    void SAL_CALL
    showPackageSignatures(const css::uno::Reference<css::embed::XStorage>& xStorage,
                          const css::uno::Reference<css::io::XInputStream>& xSignInStream) override;
    OUString SAL_CALL getPackageSignatureDefaultStreamName() override;
    void SAL_CALL
    showCertificate(const css::uno::Reference<css::security::XCertificate>& Certificate) override;
    void SAL_CALL manageTrustedSources() override;
    sal_Bool SAL_CALL
    isAuthorTrusted(const css::uno::Reference<css::security::XCertificate>& Author) override;
    sal_Bool SAL_CALL isLocationTrusted(const OUString& Location) override;
    void SAL_CALL addAuthorToTrustedSources(
        const css::uno::Reference<css::security::XCertificate>& Author) override;
    void SAL_CALL addLocationToTrustedSources(const OUString& Location) override;

    css::uno::Reference<css::security::XCertificate>
        SAL_CALL chooseCertificate(OUString& rDescription) override;
    css::uno::Reference<css::security::XCertificate>
        SAL_CALL chooseSigningCertificate(OUString& rDescription) override;
    css::uno::Reference<css::security::XCertificate>
        SAL_CALL selectSigningCertificate(OUString& rDescription) override;
    css::uno::Reference<css::security::XCertificate>
        SAL_CALL selectSigningCertificateWithType(const CertificateKind certificateKind,
                                                  OUString& rDescription) override;
    css::uno::Sequence<css::uno::Reference<css::security::XCertificate>>
        SAL_CALL chooseEncryptionCertificate() override;
    css::uno::Reference<css::security::XCertificate> SAL_CALL chooseCertificateWithProps(
        css::uno::Sequence<::com::sun::star::beans::PropertyValue>& Properties) override;

    sal_Bool SAL_CALL signDocumentWithCertificate(
                            css::uno::Reference<css::security::XCertificate> const & xCertificate,
                            css::uno::Reference<css::embed::XStorage> const & xStoragexStorage,
                            css::uno::Reference<css::io::XStream> const & xStream) override;
};

DocumentDigitalSignatures::DocumentDigitalSignatures( const Reference< XComponentContext >& rxCtx ):
    mxCtx(rxCtx),
    m_sODFVersion(ODFVER_012_TEXT),
    m_nArgumentsCount(0),
    m_bHasDocumentSignature(false)
{
}

void DocumentDigitalSignatures::initialize( const Sequence< Any >& aArguments)
{
    if (aArguments.getLength() > 2)
        throw css::lang::IllegalArgumentException(
          "DocumentDigitalSignatures::initialize requires zero, one, or two arguments",
          static_cast<XInitialization*>(this), 0);

    m_nArgumentsCount = aArguments.getLength();

    if (aArguments.getLength() > 0)
    {
        if (!(aArguments[0] >>= m_sODFVersion))
            throw css::lang::IllegalArgumentException(
                "DocumentDigitalSignatures::initialize: the first arguments must be a string",
                static_cast<XInitialization*>(this), 0);

        if (aArguments.getLength() == 2
            && !(aArguments[1] >>= m_bHasDocumentSignature))
            throw css::lang::IllegalArgumentException(
                "DocumentDigitalSignatures::initialize: the second arguments must be a bool",
                static_cast<XInitialization*>(this), 1);

        //the Version is supported as of ODF1.2, so for and 1.1 document or older we will receive the
        //an empty string. In this case we set it to ODFVER_010_TEXT. Then we can later check easily
        //if initialize was called. Only then m_sODFVersion.getLength() is greater than 0
        if (m_sODFVersion.isEmpty())
            m_sODFVersion = ODFVER_010_TEXT;
    }
}

OUString DocumentDigitalSignatures::getImplementationName()
{
    return OUString("com.sun.star.security.DocumentDigitalSignatures");
}

sal_Bool DocumentDigitalSignatures::supportsService(
    OUString const & ServiceName)
{
    return cppu::supportsService(this, ServiceName);
}

css::uno::Sequence<OUString>
DocumentDigitalSignatures::getSupportedServiceNames()
{
    Sequence<OUString> aRet{ "com.sun.star.security.DocumentDigitalSignatures" };
    return aRet;
}

sal_Bool DocumentDigitalSignatures::signDocumentContent(
    const Reference< css::embed::XStorage >& rxStorage,
    const Reference< css::io::XStream >& xSignStream)
{
    OSL_ENSURE(!m_sODFVersion.isEmpty(), "DocumentDigitalSignatures: ODF Version not set, assuming minimum 1.2");
    return ImplViewSignatures( rxStorage, xSignStream, DocumentSignatureMode::Content, false );
}

sal_Bool DocumentDigitalSignatures::signSignatureLine(
    const Reference<css::embed::XStorage>& rxStorage,
    const Reference<css::io::XStream>& xSignStream,
    const OUString& aSignatureLineId,
    const Reference<css::security::XCertificate>& xCertificate,
    const Reference<css::graphic::XGraphic>& xValidGraphic,
    const Reference<css::graphic::XGraphic>& xInvalidGraphic,
    const OUString& aComment)
{
    OSL_ENSURE(!m_sODFVersion.isEmpty(),
               "DocumentDigitalSignatures: ODF Version not set, assuming minimum 1.2");

    DocumentSignatureManager aSignatureManager(mxCtx, DocumentSignatureMode::Content);

    if (!aSignatureManager.init())
        return false;

    aSignatureManager.mxStore = rxStorage;
    aSignatureManager.maSignatureHelper.SetStorage(rxStorage, m_sODFVersion);
    aSignatureManager.mxSignatureStream = xSignStream;

    Reference<XXMLSecurityContext> xSecurityContext;
    Reference<XServiceInfo> xServiceInfo(xCertificate, UNO_QUERY);
    if (xServiceInfo->getImplementationName()
        == "com.sun.star.xml.security.gpg.XCertificate_GpgImpl")
        xSecurityContext = aSignatureManager.getGpgSecurityContext();
    else
        xSecurityContext = aSignatureManager.getSecurityContext();

    sal_Int32 nSecurityId;
    bool bSuccess = aSignatureManager.add(xCertificate, xSecurityContext, aComment, nSecurityId,
                                          true, aSignatureLineId, xValidGraphic, xInvalidGraphic);
    if (!bSuccess)
        return false;

    // Need to have this to verify the signature
    aSignatureManager.read(/*bUseTempStream=*/true, /*bCacheLastSignature=*/false);
    aSignatureManager.write(true);

    if (rxStorage.is() && !xSignStream.is())
    {
        uno::Reference<embed::XTransactedObject> xTrans(rxStorage, uno::UNO_QUERY);
        xTrans->commit();
    }

    return true;
}

Sequence< css::security::DocumentSignatureInformation >
DocumentDigitalSignatures::verifyDocumentContentSignatures(
    const Reference< css::embed::XStorage >& rxStorage,
    const Reference< css::io::XInputStream >& xSignInStream )
{
    OSL_ENSURE(!m_sODFVersion.isEmpty(),"DocumentDigitalSignatures: ODF Version not set, assuming minimum 1.2");
    return ImplVerifySignatures( rxStorage, xSignInStream, DocumentSignatureMode::Content );
}

void DocumentDigitalSignatures::showDocumentContentSignatures(
    const Reference< css::embed::XStorage >& rxStorage,
    const Reference< css::io::XInputStream >& xSignInStream )
{
    OSL_ENSURE(!m_sODFVersion.isEmpty(),"DocumentDigitalSignatures: ODF Version not set, assuming minimum 1.2");
    ImplViewSignatures( rxStorage, xSignInStream, DocumentSignatureMode::Content, true );
}

OUString DocumentDigitalSignatures::getDocumentContentSignatureDefaultStreamName()
{
    return DocumentSignatureHelper::GetDocumentContentSignatureDefaultStreamName();
}

sal_Bool DocumentDigitalSignatures::signScriptingContent(
    const Reference< css::embed::XStorage >& rxStorage,
    const Reference< css::io::XStream >& xSignStream )
{
    OSL_ENSURE(!m_sODFVersion.isEmpty(),"DocumentDigitalSignatures: ODF Version not set, assuming minimum 1.2");
    OSL_ENSURE(m_nArgumentsCount == 2, "DocumentDigitalSignatures: Service was not initialized properly");
    return ImplViewSignatures( rxStorage, xSignStream, DocumentSignatureMode::Macros, false );
}

Sequence< css::security::DocumentSignatureInformation >
DocumentDigitalSignatures::verifyScriptingContentSignatures(
    const Reference< css::embed::XStorage >& rxStorage,
    const Reference< css::io::XInputStream >& xSignInStream )
{
    OSL_ENSURE(!m_sODFVersion.isEmpty(),"DocumentDigitalSignatures: ODF Version not set, assuming minimum 1.2");
    return ImplVerifySignatures( rxStorage, xSignInStream, DocumentSignatureMode::Macros );
}

void DocumentDigitalSignatures::showScriptingContentSignatures(
    const Reference< css::embed::XStorage >& rxStorage,
    const Reference< css::io::XInputStream >& xSignInStream )
{
    OSL_ENSURE(!m_sODFVersion.isEmpty(),"DocumentDigitalSignatures: ODF Version not set, assuming minimum 1.2");
    ImplViewSignatures( rxStorage, xSignInStream, DocumentSignatureMode::Macros, true );
}

OUString DocumentDigitalSignatures::getScriptingContentSignatureDefaultStreamName()
{
    return DocumentSignatureHelper::GetScriptingContentSignatureDefaultStreamName();
}


sal_Bool DocumentDigitalSignatures::signPackage(
    const Reference< css::embed::XStorage >& rxStorage,
    const Reference< css::io::XStream >& xSignStream  )
{
    OSL_ENSURE(!m_sODFVersion.isEmpty(),"DocumentDigitalSignatures: ODF Version not set, assuming minimum 1.2");
    return ImplViewSignatures( rxStorage, xSignStream, DocumentSignatureMode::Package, false );
}

Sequence< css::security::DocumentSignatureInformation >
DocumentDigitalSignatures::verifyPackageSignatures(
    const Reference< css::embed::XStorage >& rxStorage,
    const Reference< css::io::XInputStream >& xSignInStream )
{
    OSL_ENSURE(!m_sODFVersion.isEmpty(),"DocumentDigitalSignatures: ODF Version not set, assuming minimum 1.2");
    return ImplVerifySignatures( rxStorage, xSignInStream, DocumentSignatureMode::Package );
}

void DocumentDigitalSignatures::showPackageSignatures(
    const Reference< css::embed::XStorage >& rxStorage,
    const Reference< css::io::XInputStream >& xSignInStream )
{
    OSL_ENSURE(!m_sODFVersion.isEmpty(),"DocumentDigitalSignatures: ODF Version not set, assuming minimum 1.2");
    ImplViewSignatures( rxStorage, xSignInStream, DocumentSignatureMode::Package, true );
}

OUString DocumentDigitalSignatures::getPackageSignatureDefaultStreamName(  )
{
    return DocumentSignatureHelper::GetPackageSignatureDefaultStreamName();
}


void DocumentDigitalSignatures::ImplViewSignatures(
    const Reference< css::embed::XStorage >& rxStorage,
    const Reference< css::io::XInputStream >& xSignStream,
    DocumentSignatureMode eMode, bool bReadOnly )
{
    Reference< io::XStream > xStream;
    if ( xSignStream.is() )
        xStream.set( xSignStream, UNO_QUERY );
    ImplViewSignatures( rxStorage, xStream, eMode, bReadOnly );
}

bool DocumentDigitalSignatures::ImplViewSignatures(
    const Reference< css::embed::XStorage >& rxStorage, const Reference< css::io::XStream >& xSignStream,
    DocumentSignatureMode eMode, bool bReadOnly )
{
    bool bChanges = false;
    ScopedVclPtrInstance<DigitalSignaturesDialog> aSignaturesDialog(
        nullptr, mxCtx, eMode, bReadOnly, m_sODFVersion,
        m_bHasDocumentSignature);
    bool bInit = aSignaturesDialog->Init();
    SAL_WARN_IF( !bInit, "xmlsecurity.comp", "Error initializing security context!" );
    if ( bInit )
    {
        aSignaturesDialog->SetStorage(rxStorage);

        aSignaturesDialog->SetSignatureStream( xSignStream );
        if ( aSignaturesDialog->Execute() )
        {
            if ( aSignaturesDialog->SignaturesChanged() )
            {
                bChanges = true;
                // If we have a storage and no stream, we are responsible for commit
                if ( rxStorage.is() && !xSignStream.is() )
                {
                    uno::Reference< embed::XTransactedObject > xTrans( rxStorage, uno::UNO_QUERY );
                    xTrans->commit();
                }
            }
        }
    }
    else
    {
        std::unique_ptr<weld::MessageDialog> xBox(Application::CreateMessageDialog(nullptr,
                                                  VclMessageType::Warning, VclButtonsType::Ok,
                                                  XsResId(RID_XMLSECWB_NO_MOZILLA_PROFILE)));
        xBox->run();
    }

    return bChanges;
}

Sequence< css::security::DocumentSignatureInformation >
DocumentDigitalSignatures::ImplVerifySignatures(
    const Reference< css::embed::XStorage >& rxStorage,
    const Reference< css::io::XInputStream >& xSignStream, DocumentSignatureMode eMode )
{
    DocumentSignatureManager aSignatureManager(mxCtx, eMode);

    bool bInit = aSignatureManager.init();

    SAL_WARN_IF(!bInit, "xmlsecurity.comp", "Error initializing security context!");

    if (!bInit)
        return uno::Sequence<security::DocumentSignatureInformation>(0);

    if (!rxStorage.is())
    {
        if (xSignStream.is())
        {
            // Something not ZIP-based, try PDF.
            PDFSignatureHelper& rSignatureHelper = aSignatureManager.getPDFSignatureHelper();
            if (rSignatureHelper.ReadAndVerifySignature(xSignStream))
                return rSignatureHelper.GetDocumentSignatureInformations(aSignatureManager.getSecurityEnvironment());
        }

        SAL_WARN( "xmlsecurity.comp", "Error, no XStorage provided");
        return Sequence<css::security::DocumentSignatureInformation>();
    }
    // First check for the InputStream, to avoid unnecessary initialization of the security environment...
    SignatureStreamHelper aStreamHelper;
    Reference< io::XInputStream > xInputStream = xSignStream;

    if ( !xInputStream.is() )
    {
        aStreamHelper = DocumentSignatureHelper::OpenSignatureStream( rxStorage, embed::ElementModes::READ, eMode );
        if ( aStreamHelper.xSignatureStream.is() )
            xInputStream.set( aStreamHelper.xSignatureStream, UNO_QUERY );
    }

    if (!xInputStream.is() && aStreamHelper.nStorageFormat != embed::StorageFormats::OFOPXML)
        return Sequence< css::security::DocumentSignatureInformation >(0);


    XMLSignatureHelper& rSignatureHelper = aSignatureManager.maSignatureHelper;
    rSignatureHelper.SetStorage(rxStorage, m_sODFVersion);

    rSignatureHelper.StartMission(aSignatureManager.mxSecurityContext);

    if (xInputStream.is())
        rSignatureHelper.ReadAndVerifySignature(xInputStream);
    else if (aStreamHelper.nStorageFormat == embed::StorageFormats::OFOPXML)
        rSignatureHelper.ReadAndVerifySignatureStorage(aStreamHelper.xSignatureStorage);

    rSignatureHelper.EndMission();

    uno::Reference<xml::crypto::XSecurityEnvironment> xSecEnv = aSignatureManager.getSecurityEnvironment();
    uno::Reference<xml::crypto::XSecurityEnvironment> xGpgSecEnv = aSignatureManager.getGpgSecurityEnvironment();

    SignatureInformations aSignInfos = rSignatureHelper.GetSignatureInformations();
    int nInfos = aSignInfos.size();
    Sequence< css::security::DocumentSignatureInformation > aInfos(nInfos);
    css::security::DocumentSignatureInformation* arInfos = aInfos.getArray();

    if ( nInfos )
    {
        for( int n = 0; n < nInfos; ++n )
        {
            DocumentSignatureAlgorithm mode = DocumentSignatureHelper::getDocumentAlgorithm(
                m_sODFVersion, aSignInfos[n]);
            const std::vector< OUString > aElementsToBeVerified =
                DocumentSignatureHelper::CreateElementList(
                rxStorage, eMode, mode);

            const SignatureInformation& rInfo = aSignInfos[n];
            css::security::DocumentSignatureInformation& rSigInfo = arInfos[n];

            if (!rInfo.X509Datas.empty()) // X.509
            {
                std::vector<uno::Reference<security::XCertificate>> certs(
                    rSignatureHelper.CheckAndUpdateSignatureInformation(
                        xSecEnv, rInfo));
                if (certs.empty())
                {
                    rSigInfo.CertificateStatus = css::security::CertificateValidity::INVALID;
                }
                else
                {
                    rSigInfo.Signer = certs.back();
                    // get only intermediates
                    certs.pop_back();
                // On Windows checking the certificate path is buggy. It does name matching (issuer, subject name)
                // to find the parent certificate. It does not take into account that there can be several certificates
                // with the same subject name.
                    try
                    {
                        rSigInfo.CertificateStatus = xSecEnv->verifyCertificate(
                            rSigInfo.Signer, comphelper::containerToSequence(certs));
                    }
                    catch (SecurityException&)
                    {
                        SAL_WARN("xmlsecurity.comp", "Verification of certificate failed");
                        rSigInfo.CertificateStatus = css::security::CertificateValidity::INVALID;
                    }
                }
            }
            else if (!rInfo.ouGpgCertificate.isEmpty() && xGpgSecEnv.is()) // GPG
            {
                // TODO not ideal to retrieve cert by keyID, might
                // collide, or PGPKeyID format might change - can't we
                // keep the xCert itself in rInfo?
                rSigInfo.Signer = xGpgSecEnv->getCertificate( rInfo.ouGpgKeyID, xmlsecurity::numericStringToBigInteger("") );
                rSigInfo.CertificateStatus = xGpgSecEnv->verifyCertificate(rSigInfo.Signer,
                                                                           Sequence<Reference<css::security::XCertificate> >());
            }

            // Time support again (#i38744#)
            Date aDate( rInfo.stDateTime.Day, rInfo.stDateTime.Month, rInfo.stDateTime.Year );
            tools::Time aTime( rInfo.stDateTime.Hours, rInfo.stDateTime.Minutes,
                        rInfo.stDateTime.Seconds, rInfo.stDateTime.NanoSeconds );
            rSigInfo.SignatureDate = aDate.GetDate();
            rSigInfo.SignatureTime = aTime.GetTime() / tools::Time::nanoPerCenti;

            rSigInfo.SignatureIsValid = ( rInfo.nStatus == css::xml::crypto::SecurityOperationStatus_OPERATION_SUCCEEDED );

            // Signature line info (ID + Images)
            if (!rInfo.ouSignatureLineId.isEmpty())
                rSigInfo.SignatureLineId = rInfo.ouSignatureLineId;

            if (rInfo.aValidSignatureImage.is())
                rSigInfo.ValidSignatureLineImage = rInfo.aValidSignatureImage;

            if (rInfo.aInvalidSignatureImage.is())
                rSigInfo.InvalidSignatureLineImage = rInfo.aInvalidSignatureImage;

            // OOXML intentionally doesn't sign metadata.
            if ( rSigInfo.SignatureIsValid && aStreamHelper.nStorageFormat != embed::StorageFormats::OFOPXML)
            {
                 rSigInfo.SignatureIsValid =
                      DocumentSignatureHelper::checkIfAllFilesAreSigned(
                      aElementsToBeVerified, rInfo, mode);
            }
            if (eMode == DocumentSignatureMode::Content)
            {
                if (aStreamHelper.nStorageFormat == embed::StorageFormats::OFOPXML)
                    rSigInfo.PartialDocumentSignature = true;
                else
                    rSigInfo.PartialDocumentSignature = !DocumentSignatureHelper::isOOo3_2_Signature(aSignInfos[n]);
            }

        }
    }
    return aInfos;

}

void DocumentDigitalSignatures::manageTrustedSources(  )
{
    // MT: i45295
    // SecEnv is only needed to display certificate information from trusted sources.
    // Macro Security also has some options where no security environment is needed, so raise dialog anyway.
    // Later I should change the code so the Dialog creates the SecEnv on demand...

    Reference< css::xml::crypto::XSecurityEnvironment > xSecEnv;

    DocumentSignatureManager aSignatureManager(mxCtx, {});
    if (aSignatureManager.init())
        xSecEnv = aSignatureManager.getSecurityEnvironment();

    ScopedVclPtrInstance< MacroSecurity > aDlg( nullptr, xSecEnv );
    aDlg->Execute();
}

void DocumentDigitalSignatures::showCertificate(
    const Reference< css::security::XCertificate >& Certificate )
{
    DocumentSignatureManager aSignatureManager(mxCtx, {});

    bool bInit = aSignatureManager.init();

    SAL_WARN_IF( !bInit, "xmlsecurity.comp", "Error initializing security context!" );

    if ( bInit )
    {
        ScopedVclPtrInstance<CertificateViewer> aViewer(nullptr, aSignatureManager.getSecurityEnvironment(), Certificate, false);
        aViewer->Execute();
    }

}

sal_Bool DocumentDigitalSignatures::isAuthorTrusted(
    const Reference<css::security::XCertificate>& xAuthor)
{
    if (!xAuthor.is())
    {
        return false;
    }
    bool bFound = false;

    OUString sSerialNum = xmlsecurity::bigIntegerToNumericString(xAuthor->getSerialNumber());

    Sequence< SvtSecurityOptions::Certificate > aTrustedAuthors = SvtSecurityOptions().GetTrustedAuthors();
    const SvtSecurityOptions::Certificate* pAuthors = aTrustedAuthors.getConstArray();
    const SvtSecurityOptions::Certificate* pAuthorsEnd = pAuthors + aTrustedAuthors.getLength();
    for ( ; pAuthors != pAuthorsEnd; ++pAuthors )
    {
        SvtSecurityOptions::Certificate aAuthor = *pAuthors;
        if (xmlsecurity::EqualDistinguishedNames(aAuthor[0], xAuthor->getIssuerName())
            && (aAuthor[1] == sSerialNum))
        {
            bFound = true;
            break;
        }
    }

    return bFound;
}

uno::Sequence<Reference<css::security::XCertificate>>
DocumentDigitalSignatures::chooseCertificatesImpl(std::map<OUString, OUString>& rProperties,
                                                  const UserAction eAction,
                                                  const CertificateKind certificateKind)
{
    std::vector< Reference< css::xml::crypto::XXMLSecurityContext > > xSecContexts;

    DocumentSignatureManager aSignatureManager(mxCtx, {});
    if (aSignatureManager.init()) {
        xSecContexts.push_back(aSignatureManager.getSecurityContext());
        // Don't include OpenPGP if only X.509 certs are requested
        if (certificateKind == CertificateKind_NONE || certificateKind == CertificateKind_OPENPGP)
            xSecContexts.push_back(aSignatureManager.getGpgSecurityContext());
    }

    ScopedVclPtrInstance< CertificateChooser > aChooser(nullptr, mxCtx, xSecContexts, eAction);

    uno::Sequence< Reference< css::security::XCertificate > > xCerts(1);
    xCerts[0] = Reference< css::security::XCertificate >(nullptr);

    if (aChooser->Execute() != RET_OK)
        return xCerts;

    xCerts = aChooser->GetSelectedCertificates();
    rProperties["Description"] = aChooser->GetDescription();
    rProperties["Usage"] = aChooser->GetUsageText();

    return xCerts;
}

Reference< css::security::XCertificate > DocumentDigitalSignatures::chooseCertificate(OUString& rDescription)
{
    return chooseSigningCertificate( rDescription );
}

Reference< css::security::XCertificate > DocumentDigitalSignatures::chooseSigningCertificate(OUString& rDescription)
{
    std::map<OUString, OUString> aProperties;
    Reference< css::security::XCertificate > xCert = chooseCertificatesImpl( aProperties, UserAction::Sign )[0];
    rDescription = aProperties["Description"];
    return xCert;
}

Reference< css::security::XCertificate > DocumentDigitalSignatures::selectSigningCertificate(OUString& rDescription)
{
    std::map<OUString, OUString> aProperties;
    Reference< css::security::XCertificate > xCert = chooseCertificatesImpl( aProperties, UserAction::SelectSign )[0];
    rDescription = aProperties["Description"];
    return xCert;
}

Reference<css::security::XCertificate>
DocumentDigitalSignatures::selectSigningCertificateWithType(const CertificateKind certificateKind,
                                                            OUString& rDescription)
{
    std::map<OUString, OUString> aProperties;
    Reference<css::security::XCertificate> xCert
        = chooseCertificatesImpl(aProperties, UserAction::SelectSign, certificateKind)[0];
    rDescription = aProperties["Description"];
    return xCert;
}

css::uno::Sequence< Reference< css::security::XCertificate > > DocumentDigitalSignatures::chooseEncryptionCertificate()
{
    std::map<OUString, OUString> aProperties;
    uno::Sequence< Reference< css::security::XCertificate > > aCerts=
        chooseCertificatesImpl( aProperties, UserAction::Encrypt );
    if (aCerts.getLength() == 1 && !aCerts[0].is())
        // our error case contract is: empty sequence, so map that!
        return uno::Sequence< Reference< css::security::XCertificate > >();
    else
        return aCerts;
}

css::uno::Reference< css::security::XCertificate > DocumentDigitalSignatures::chooseCertificateWithProps(Sequence<::com::sun::star::beans::PropertyValue>& rProperties)
{
    std::map<OUString, OUString> aProperties;
    auto xCert = chooseCertificatesImpl( aProperties, UserAction::Sign )[0];

    std::vector<css::beans::PropertyValue> vec;
    vec.reserve(aProperties.size());
    for (const auto& pair : aProperties)
    {
        vec.emplace_back(comphelper::makePropertyValue(pair.first, pair.second));
    }

    rProperties = comphelper::containerToSequence(vec);
    return xCert;
}

sal_Bool DocumentDigitalSignatures::isLocationTrusted( const OUString& Location )
{
    return SvtSecurityOptions().isTrustedLocationUri(Location);
}

void DocumentDigitalSignatures::addAuthorToTrustedSources(
    const Reference< css::security::XCertificate >& Author )
{
    SvtSecurityOptions aSecOpts;

    SvtSecurityOptions::Certificate aNewCert( 3 );
    aNewCert[ 0 ] = Author->getIssuerName();
    aNewCert[ 1 ] = xmlsecurity::bigIntegerToNumericString( Author->getSerialNumber() );

    OUStringBuffer aStrBuffer;
    ::comphelper::Base64::encode(aStrBuffer, Author->getEncoded());
    aNewCert[ 2 ] = aStrBuffer.makeStringAndClear();


    Sequence< SvtSecurityOptions::Certificate > aTrustedAuthors = aSecOpts.GetTrustedAuthors();
    sal_Int32 nCnt = aTrustedAuthors.getLength();
    aTrustedAuthors.realloc( nCnt + 1 );
    aTrustedAuthors[ nCnt ] = aNewCert;

    aSecOpts.SetTrustedAuthors( aTrustedAuthors );
}

void DocumentDigitalSignatures::addLocationToTrustedSources( const OUString& Location )
{
    SvtSecurityOptions aSecOpt;

    Sequence< OUString > aSecURLs = aSecOpt.GetSecureURLs();
    sal_Int32 nCnt = aSecURLs.getLength();
    aSecURLs.realloc( nCnt + 1 );
    aSecURLs[ nCnt ] = Location;

    aSecOpt.SetSecureURLs( aSecURLs );
}

sal_Bool DocumentDigitalSignatures::signDocumentWithCertificate(
            css::uno::Reference<css::security::XCertificate> const & xCertificate,
            css::uno::Reference<css::embed::XStorage> const & xStorage,
            css::uno::Reference<css::io::XStream> const & xStream)
{
    DocumentSignatureManager aSignatureManager(mxCtx, DocumentSignatureMode::Content);

    if (!aSignatureManager.init())
        return false;

    aSignatureManager.mxStore = xStorage;
    aSignatureManager.maSignatureHelper.SetStorage(xStorage, m_sODFVersion);
    aSignatureManager.mxSignatureStream = xStream;

    Reference<XXMLSecurityContext> xSecurityContext;
    Reference<XServiceInfo> xServiceInfo(xCertificate, UNO_QUERY);
    xSecurityContext = aSignatureManager.getSecurityContext();

    sal_Int32 nSecurityId;

    bool bSuccess = aSignatureManager.add(xCertificate, xSecurityContext, "", nSecurityId, true);
    if (!bSuccess)
        return false;

    aSignatureManager.read(/*bUseTempStream=*/true, /*bCacheLastSignature=*/false);
    aSignatureManager.write(true);

    if (xStorage.is() && !xStream.is())
    {
        uno::Reference<embed::XTransactedObject> xTransaction(xStorage, uno::UNO_QUERY);
        xTransaction->commit();
    }

    return true;
}

extern "C" SAL_DLLPUBLIC_EXPORT uno::XInterface*
com_sun_star_security_DocumentDigitalSignatures_get_implementation(
    uno::XComponentContext* pCtx, uno::Sequence<uno::Any> const& /*rSeq*/)
{
    return cppu::acquire(
        new DocumentDigitalSignatures(uno::Reference<uno::XComponentContext>(pCtx)));
}

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