Signature verification UI

PdfForQtLib/sources/pdfsignaturehandler.cpp

@@ -861,8 +861,8 @@ QDateTime pdf::PDFPublicKeySignatureHandler::getDateTimeFromASN(const ASN1_TIME*
         tm internalTime = { };
         if (ASN1_TIME_to_tm(time, &internalTime) > 0)
         {
-            time_t localTime = mktime(&internalTime);
-            result = QDateTime::fromSecsSinceEpoch(localTime, Qt::LocalTime);
+            time_t localTime = _mkgmtime(&internalTime);
+            result = QDateTime::fromSecsSinceEpoch(localTime, Qt::UTC);
         }
     }
 

PdfForQtLib/sources/pdfsignaturehandler.h

@@ -280,6 +280,8 @@ public:
 
         Error_Signatures_Mask = Error_Signature_Invalid | Error_Signature_SourceCertificateMissing | Error_Signature_NoSignaturesFound |
                                 Error_Signature_DigestFailure | Error_Signature_DataOther | Error_Signature_DataCoveredBySignatureMissing,
+
+        Warnings_Mask = Warning_Signature_NotCoveredBytes
     };
     Q_DECLARE_FLAGS(VerificationFlags, VerificationFlag)
 
@@ -309,6 +311,7 @@ public:
     bool isCertificateValid() const { return hasFlag(Certificate_OK); }
     bool isSignatureValid() const { return hasFlag(Signature_OK); }
     bool hasError() const { return !isValid(); }
+    bool hasWarning() const { return m_flags & Warnings_Mask; }
     bool hasCertificateError() const { return m_flags & Error_Certificates_Mask; }
     bool hasSignatureError() const { return m_flags & Error_Signatures_Mask; }
     bool hasFlag(VerificationFlag flag) const { return m_flags.testFlag(flag); }
@@ -318,6 +321,7 @@ public:
     const QString& getSignatureFieldQualifiedName() const { return m_signatureFieldQualifiedName; }
     const QStringList& getErrors() const { return m_errors; }
     const QStringList& getWarnings() const { return m_warnings; }
+    const PDFCertificateInfos& getCertificateInfos() const { return m_certificateInfos; }
 
     void setSignatureFieldQualifiedName(const QString& signatureFieldQualifiedName);
     void setSignatureFieldReference(PDFObjectReference signatureFieldReference);

PdfForQtViewer/pdfforqtviewer.qrc

@@ -46,5 +46,9 @@
         <file>resources/form-settings.svg</file>
         <file>resources/undo.svg</file>
         <file>resources/redo.svg</file>
+        <file>resources/result-error.svg</file>
+        <file>resources/result-information.svg</file>
+        <file>resources/result-ok.svg</file>
+        <file>resources/result-warning.svg</file>
     </qresource>
 </RCC>

PdfForQtViewer/pdfsidebarwidget.cpp

@@ -24,6 +24,7 @@
 #include "pdfdocument.h"
 #include "pdfitemmodels.h"
 #include "pdfexception.h"
+#include "pdfsignaturehandler.h"
 #include "pdfdrawspacecontroller.h"
 
 #include <QMenu>
@@ -97,6 +98,7 @@ PDFSidebarWidget::PDFSidebarWidget(pdf::PDFDrawWidgetProxy* proxy, PDFTextToSpee
     m_pageInfo[Thumbnails] = { ui->thumbnailsButton, ui->thumbnailsPage };
     m_pageInfo[Attachments] = { ui->attachmentsButton, ui->attachmentsPage };
     m_pageInfo[Speech] = { ui->speechButton, ui->speechPage };
+    m_pageInfo[Signatures] = { ui->signaturesButton, ui->signaturesPage };
 
     for (const auto& pageInfo : m_pageInfo)
     {
@@ -121,7 +123,7 @@ PDFSidebarWidget::~PDFSidebarWidget()
     delete ui;
 }
 
-void PDFSidebarWidget::setDocument(const pdf::PDFModifiedDocument& document)
+void PDFSidebarWidget::setDocument(const pdf::PDFModifiedDocument& document, const std::vector<pdf::PDFSignatureVerificationResult>& signatures)
 {
     m_document = document;
     m_optionalContentActivity = document.getOptionalContentActivity();
@@ -196,6 +198,7 @@ void PDFSidebarWidget::setDocument(const pdf::PDFModifiedDocument& document)
     // Update GUI
     updateGUI(preferred);
     updateButtons();
+    updateSignatures(signatures);
 }
 
 bool PDFSidebarWidget::isEmpty() const
@@ -233,6 +236,9 @@ bool PDFSidebarWidget::isEmpty(Page page) const
         case Speech:
             return !m_textToSpeech->isValid();
 
+        case Signatures:
+            return !m_signatures.empty();
+
         default:
             Q_ASSERT(false);
             break;
@@ -331,6 +337,201 @@ void PDFSidebarWidget::updateButtons()
     }
 }
 
+void PDFSidebarWidget::updateSignatures(const std::vector<pdf::PDFSignatureVerificationResult>& signatures)
+{
+    ui->signatureTreeWidget->setUpdatesEnabled(false);
+    ui->signatureTreeWidget->clear();
+
+    QIcon okIcon(":/resources/result-ok.svg");
+    QIcon errorIcon(":/resources/result-error.svg");
+    QIcon warningIcon(":/resources/result-warning.svg");
+    QIcon infoIcon(":/resources/result-information.svg");
+
+    for (const pdf::PDFSignatureVerificationResult& signature : signatures)
+    {
+        const pdf::PDFCertificateInfos& certificateInfos = signature.getCertificateInfos();
+        const pdf::PDFCertificateInfo* certificateInfo = !certificateInfos.empty() ? &certificateInfos.front() : nullptr;
+
+        QString text = tr("Signed by - %1").arg(certificateInfo ? certificateInfo->getName(pdf::PDFCertificateInfo::CommonName) : tr("Unknown"));
+        QTreeWidgetItem* rootItem = new QTreeWidgetItem(QStringList(text));
+
+        if (signature.hasError())
+        {
+            rootItem->setIcon(0, errorIcon);
+        }
+        else if (signature.hasWarning())
+        {
+            rootItem->setIcon(0, warningIcon);
+        }
+        else
+        {
+            rootItem->setIcon(0, okIcon);
+        }
+
+        if (signature.isCertificateValid())
+        {
+            QTreeWidgetItem* certificateItem = new QTreeWidgetItem(rootItem, QStringList(tr("Certificate is valid.")));
+            certificateItem->setIcon(0, okIcon);
+        }
+
+        if (signature.isSignatureValid())
+        {
+            QTreeWidgetItem* signatureItem = new QTreeWidgetItem(rootItem, QStringList(tr("Signature is valid.")));
+            signatureItem->setIcon(0, okIcon);
+        }
+
+        for (const QString& error : signature.getErrors())
+        {
+            QTreeWidgetItem* item = new QTreeWidgetItem(rootItem, QStringList(error));
+            item->setIcon(0, errorIcon);
+        }
+
+        for (const QString& error : signature.getWarnings())
+        {
+            QTreeWidgetItem* item = new QTreeWidgetItem(rootItem, QStringList(error));
+            item->setIcon(0, warningIcon);
+        }
+
+        if (certificateInfo)
+        {
+            QTreeWidgetItem* certChainRoot = new QTreeWidgetItem(rootItem, QStringList(tr("Certificate validation chain")));
+            certChainRoot->setIcon(0, infoIcon);
+            for (const pdf::PDFCertificateInfo& currentCertificateInfo : certificateInfos)
+            {
+                QTreeWidgetItem* certRoot = new QTreeWidgetItem(certChainRoot, QStringList(currentCertificateInfo.getName(pdf::PDFCertificateInfo::CommonName)));
+                certRoot->setIcon(0, infoIcon);
+
+                auto addName = [certRoot, &currentCertificateInfo, &infoIcon](pdf::PDFCertificateInfo::NameEntry nameEntry, QString caption)
+                {
+                    QString text = currentCertificateInfo.getName(nameEntry);
+                    if (!text.isEmpty())
+                    {
+                        QTreeWidgetItem* item = new QTreeWidgetItem(certRoot, QStringList(QString("%1: %2").arg(caption, text)));
+                        item->setIcon(0, infoIcon);
+                    }
+                };
+
+                QString publicKeyMethod;
+                switch (currentCertificateInfo.getPublicKey())
+                {
+                    case pdf::PDFCertificateInfo::KeyRSA:
+                        publicKeyMethod = tr("Protected by RSA method, %1-bit key").arg(currentCertificateInfo.getKeySize());
+                        break;
+
+                    case pdf::PDFCertificateInfo::KeyDSA:
+                        publicKeyMethod = tr("Protected by DSA method, %1-bit key").arg(currentCertificateInfo.getKeySize());
+                        break;
+
+                    case pdf::PDFCertificateInfo::KeyEC:
+                        publicKeyMethod = tr("Protected by EC method, %1-bit key").arg(currentCertificateInfo.getKeySize());
+                        break;
+
+                    case pdf::PDFCertificateInfo::KeyDH:
+                        publicKeyMethod = tr("Protected by DH method, %1-bit key").arg(currentCertificateInfo.getKeySize());
+                        break;
+
+                    case pdf::PDFCertificateInfo::KeyUnknown:
+                        publicKeyMethod = tr("Unknown protection method, %1-bit key").arg(currentCertificateInfo.getKeySize());
+                        break;
+
+                    default:
+                        Q_ASSERT(false);
+                        break;
+                }
+
+                addName(pdf::PDFCertificateInfo::CountryName, tr("Country"));
+                addName(pdf::PDFCertificateInfo::OrganizationName, tr("Organization"));
+                addName(pdf::PDFCertificateInfo::OrganizationalUnitName, tr("Org. unit"));
+                addName(pdf::PDFCertificateInfo::DistinguishedName, tr("Name"));
+                addName(pdf::PDFCertificateInfo::StateOrProvinceName, tr("State"));
+                addName(pdf::PDFCertificateInfo::SerialNumber, tr("Serial number"));
+                addName(pdf::PDFCertificateInfo::LocalityName, tr("Locality"));
+                addName(pdf::PDFCertificateInfo::Title, tr("Title"));
+                addName(pdf::PDFCertificateInfo::Surname, tr("Surname"));
+                addName(pdf::PDFCertificateInfo::GivenName, tr("Forename"));
+                addName(pdf::PDFCertificateInfo::Initials, tr("Initials"));
+                addName(pdf::PDFCertificateInfo::Pseudonym, tr("Pseudonym"));
+                addName(pdf::PDFCertificateInfo::GenerationalQualifier, tr("Qualifier"));
+                addName(pdf::PDFCertificateInfo::Email, tr("Email"));
+
+                QTreeWidgetItem* publicKeyItem = new QTreeWidgetItem(certRoot, QStringList(publicKeyMethod));
+                publicKeyItem->setIcon(0, infoIcon);
+
+                QDateTime notValidBefore = currentCertificateInfo.getNotValidBefore().toLocalTime();
+                QDateTime notValidAfter = currentCertificateInfo.getNotValidAfter().toLocalTime();
+
+                if (notValidBefore.isValid())
+                {
+                    QTreeWidgetItem* item = new QTreeWidgetItem(certRoot, QStringList(QString("Valid from: %2").arg(notValidBefore.toString(Qt::DefaultLocaleShortDate))));
+                    item->setIcon(0, infoIcon);
+                }
+
+                if (notValidAfter.isValid())
+                {
+                    QTreeWidgetItem* item = new QTreeWidgetItem(certRoot, QStringList(QString("Valid to: %2").arg(notValidAfter.toString(Qt::DefaultLocaleShortDate))));
+                    item->setIcon(0, infoIcon);
+                }
+
+                QStringList keyUsages;
+                pdf::PDFCertificateInfo::KeyUsageFlags keyUsageFlags = currentCertificateInfo.getKeyUsage();
+                if (keyUsageFlags.testFlag(pdf::PDFCertificateInfo::KeyUsageDigitalSignature))
+                {
+                    keyUsages << tr("Digital signatures");
+                }
+                if (keyUsageFlags.testFlag(pdf::PDFCertificateInfo::KeyUsageNonRepudiation))
+                {
+                    keyUsages << tr("Non-repudiation");
+                }
+                if (keyUsageFlags.testFlag(pdf::PDFCertificateInfo::KeyUsageKeyEncipherment))
+                {
+                    keyUsages << tr("Key encipherement");
+                }
+                if (keyUsageFlags.testFlag(pdf::PDFCertificateInfo::KeyUsageDataEncipherment))
+                {
+                    keyUsages << tr("Application data encipherement");
+                }
+                if (keyUsageFlags.testFlag(pdf::PDFCertificateInfo::KeyUsageAgreement))
+                {
+                    keyUsages << tr("Key agreement");
+                }
+                if (keyUsageFlags.testFlag(pdf::PDFCertificateInfo::KeyUsageCertSign))
+                {
+                    keyUsages << tr("Verify signatures on certificates");
+                }
+                if (keyUsageFlags.testFlag(pdf::PDFCertificateInfo::KeyUsageCrlSign))
+                {
+                    keyUsages << tr("Verify signatures on revocation information");
+                }
+                if (keyUsageFlags.testFlag(pdf::PDFCertificateInfo::KeyUsageEncipherOnly))
+                {
+                    keyUsages << tr("Encipher data during key agreement");
+                }
+                if (keyUsageFlags.testFlag(pdf::PDFCertificateInfo::KeyUsageDecipherOnly))
+                {
+                    keyUsages << tr("Decipher data during key agreement");
+                }
+
+                if (!keyUsages.isEmpty())
+                {
+                    QTreeWidgetItem* keyUsageRoot = new QTreeWidgetItem(certRoot, QStringList(tr("Key usages")));
+                    keyUsageRoot->setIcon(0, infoIcon);
+
+                    for (const QString& keyUsage : keyUsages)
+                    {
+                        QTreeWidgetItem* keyUsageItem = new QTreeWidgetItem(keyUsageRoot, QStringList(keyUsage));
+                        keyUsageItem->setIcon(0, infoIcon);
+                    }
+                }
+            }
+        }
+
+        ui->signatureTreeWidget->addTopLevelItem(rootItem);
+    }
+
+    ui->signatureTreeWidget->expandToDepth(1);
+    ui->signatureTreeWidget->setUpdatesEnabled(true);
+}
+
 void PDFSidebarWidget::onPageButtonClicked()
 {
     QObject* pushButton = sender();

PdfForQtViewer/pdfsidebarwidget.h

@@ -37,10 +37,11 @@ class PDFAction;
 class PDFDocument;
 class PDFDrawWidgetProxy;
 class PDFModifiedDocument;
-class PDFOutlineTreeItemModel;
 class PDFThumbnailsItemModel;
-class PDFAttachmentsTreeItemModel;
+class PDFOutlineTreeItemModel;
 class PDFOptionalContentActivity;
+class PDFAttachmentsTreeItemModel;
+class PDFSignatureVerificationResult;
 class PDFOptionalContentTreeItemModel;
 }
 
@@ -67,10 +68,11 @@ public:
         OptionalContent,
         Attachments,
         Speech,
+        Signatures,
         _END
     };
 
-    void setDocument(const pdf::PDFModifiedDocument& document);
+    void setDocument(const pdf::PDFModifiedDocument& document, const std::vector<pdf::PDFSignatureVerificationResult>& signatures);
 
     /// Returns true, if all items in sidebar are empty
     bool isEmpty() const;
@@ -93,6 +95,7 @@ signals:
 private:
     void updateGUI(Page preferredPage);
     void updateButtons();
+    void updateSignatures(const std::vector<pdf::PDFSignatureVerificationResult>& signatures);
 
     void onPageButtonClicked();
     void onOutlineItemClicked(const QModelIndex& index);
@@ -116,6 +119,7 @@ private:
     pdf::PDFOptionalContentActivity* m_optionalContentActivity;
     pdf::PDFAttachmentsTreeItemModel* m_attachmentsTreeModel;
     std::map<Page, PageInfo> m_pageInfo;
+    std::vector<pdf::PDFSignatureVerificationResult> m_signatures;
 };
 
 }   // namespace pdfviewer

PdfForQtViewer/pdfsidebarwidget.ui

@@ -93,6 +93,19 @@
        </property>
       </widget>
      </item>
+     <item>
+      <widget class="QPushButton" name="signaturesButton">
+       <property name="text">
+        <string>Signatures</string>
+       </property>
+       <property name="checkable">
+        <bool>true</bool>
+       </property>
+       <property name="flat">
+        <bool>true</bool>
+       </property>
+      </widget>
+     </item>
      <item>
       <spacer name="buttonSpacer">
        <property name="orientation">
@@ -111,7 +124,7 @@
    <item>
     <widget class="QStackedWidget" name="stackedWidget">
      <property name="currentIndex">
-      <number>5</number>
+      <number>6</number>
      </property>
      <widget class="QWidget" name="emptyPage"/>
      <widget class="QWidget" name="bookmarksPage">
@@ -392,6 +405,37 @@
        </item>
       </layout>
      </widget>
+     <widget class="QWidget" name="signaturesPage">
+      <layout class="QVBoxLayout" name="signaturesPageLayout">
+       <property name="leftMargin">
+        <number>0</number>
+       </property>
+       <property name="topMargin">
+        <number>0</number>
+       </property>
+       <property name="rightMargin">
+        <number>0</number>
+       </property>
+       <property name="bottomMargin">
+        <number>0</number>
+       </property>
+       <item>
+        <widget class="QTreeWidget" name="signatureTreeWidget">
+         <property name="wordWrap">
+          <bool>true</bool>
+         </property>
+         <property name="headerHidden">
+          <bool>true</bool>
+         </property>
+         <column>
+          <property name="text">
+           <string notr="true">1</string>
+          </property>
+         </column>
+        </widget>
+       </item>
+      </layout>
+     </widget>
     </widget>
    </item>
   </layout>

PdfForQtViewer/pdfviewermainwindow.cpp

@@ -967,8 +967,7 @@ void PDFViewerMainWindow::openDocument(const QString& fileName)
         {
             // Verify signatures
             pdf::PDFForm form = pdf::PDFForm::parse(&document, document.getCatalog()->getFormObject());
-            std::vector<pdf::PDFSignatureVerificationResult> signaturesVerifications = pdf::PDFSignatureHandler::verifySignatures(form, reader.getSource());
-
+            result.signatures = pdf::PDFSignatureHandler::verifySignatures(form, reader.getSource());
             result.document.reset(new pdf::PDFDocument(qMove(document)));
         }
 
@@ -1001,7 +1000,8 @@ void PDFViewerMainWindow::onDocumentReadingFinished()
             // We add file to recent files only, if we have successfully read the document
             m_recentFileManager->addRecentFile(m_fileInfo.originalFileName);
 
-            m_pdfDocument = result.document;
+            m_pdfDocument = qMove(result.document);
+            m_signatures = qMove(result.signatures);
             pdf::PDFModifiedDocument document(m_pdfDocument.data(), m_optionalContentActivity);
             setDocument(document);
 
@@ -1072,7 +1072,7 @@ void PDFViewerMainWindow::setDocument(pdf::PDFModifiedDocument document)
     m_toolManager->setDocument(document);
     m_textToSpeech->setDocument(document);
     m_pdfWidget->setDocument(document);
-    m_sidebarWidget->setDocument(document);
+    m_sidebarWidget->setDocument(document, m_signatures);
     m_advancedFindWidget->setDocument(document);
 
     if (m_sidebarWidget->isEmpty())
@@ -1109,6 +1109,7 @@ void PDFViewerMainWindow::setDocument(pdf::PDFModifiedDocument document)
 
 void PDFViewerMainWindow::closeDocument()
 {
+    m_signatures.clear();
     setDocument(pdf::PDFModifiedDocument());
     m_pdfDocument.reset();
     updateActionsAvailability();

PdfForQtViewer/pdfviewermainwindow.h

@@ -158,6 +158,7 @@ private:
         pdf::PDFDocumentPointer document;
         QString errorMessage;
         pdf::PDFDocumentReader::Result result = pdf::PDFDocumentReader::Result::Cancelled;
+        std::vector<pdf::PDFSignatureVerificationResult> signatures;
     };
 
     Ui::PDFViewerMainWindow* ui;
@@ -179,6 +180,7 @@ private:
     QWinTaskbarButton* m_taskbarButton;
     QWinTaskbarProgress* m_progressTaskbarIndicator;
     PDFFileInfo m_fileInfo;
+    std::vector<pdf::PDFSignatureVerificationResult> m_signatures;
 
     QFuture<AsyncReadingResult> m_future;
     QFutureWatcher<AsyncReadingResult>* m_futureWatcher;

PdfForQtViewer/resources/result-error.svg

@@ -0,0 +1,101 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="30mm"
+   height="30mm"
+   viewBox="0 0 30 30"
+   version="1.1"
+   id="svg8"
+   inkscape:version="0.92.4 (5da689c313, 2019-01-14)"
+   sodipodi:docname="result-error.svg">
+  <defs
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+     inkscape:document-units="mm"
+     inkscape:current-layer="layer1"
+     showgrid="false"
+     inkscape:window-width="3840"
+     inkscape:window-height="2035"
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+        <dc:title />
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+           rdf:resource="http://creativecommons.org/licenses/by-sa/4.0/" />
+        <dc:creator>
+          <cc:Agent>
+            <dc:title>Jakub Melka</dc:title>
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+        </dc:creator>
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+      <cc:License
+         rdf:about="http://creativecommons.org/licenses/by-sa/4.0/">
+        <cc:permits
+           rdf:resource="http://creativecommons.org/ns#Reproduction" />
+        <cc:permits
+           rdf:resource="http://creativecommons.org/ns#Distribution" />
+        <cc:requires
+           rdf:resource="http://creativecommons.org/ns#Notice" />
+        <cc:requires
+           rdf:resource="http://creativecommons.org/ns#Attribution" />
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+           rdf:resource="http://creativecommons.org/ns#DerivativeWorks" />
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PdfForQtViewer/resources/result-information.svg

@@ -0,0 +1,101 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
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+   height="30mm"
+   viewBox="0 0 30 30"
+   version="1.1"
+   id="svg8"
+   inkscape:version="0.92.4 (5da689c313, 2019-01-14)"
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