Add certificate store for access to NSS keys

WIP - add interfaces and methods to get access to NSS-via-poppler
sign certificates, and provide them for signing documents.

core/generator.h

@@ -20,6 +20,7 @@
 #include "global.h"
 #include "okularcore_export.h"
 #include "pagesize.h"
+#include "signatureutils.h"
 
 #include <QList>
 #include <QObject>
@@ -311,6 +312,8 @@ public:
 
     virtual bool sign( const Okular::Annotation* /*pWhichAnnotation*/, const QString& /*rFilename*/) { return false; }
 
+    virtual CertificateStore* getCertStore() { return nullptr; }
+
     /**
      * This method can be called to trigger the generation of
      * a new pixmap as described by @p request.

core/signatureutils.cpp

@@ -154,3 +154,16 @@ const CertificateInfo &SignatureInfo::certificateInfo() const
     static CertificateInfo dummy;
     return dummy;
 }
+
+CertificateStore::CertificateStore()
+{
+}
+
+CertificateStore::~CertificateStore()
+{
+}
+
+QList<CertificateInfo*> CertificateStore::getSigningCertificates() const
+{
+    return QList<CertificateInfo*>();
+}

core/signatureutils.h

@@ -239,6 +239,29 @@ private:
     Q_DISABLE_COPY(SignatureInfo)
 };
 
+/**
+ * @short A helper class to store information about x509 certificate
+ */
+class OKULARCORE_EXPORT CertificateStore
+{
+    public:
+        /**
+         * Destructor
+         */
+        virtual ~CertificateStore();
+
+        /**
+         * Returns list of valid, usable signing certificates
+         */
+        virtual QList<CertificateInfo*> getSigningCertificates() const;
+
+    protected:
+        CertificateStore();
+
+    private:
+        Q_DISABLE_COPY( CertificateStore )
+};
+
 }
 
 #endif

generators/poppler/generator_pdf.h

@@ -103,6 +103,8 @@ public:
     bool canSign() const override {return true;}
     bool sign( const Okular::Annotation* pWhichAnnotation, const QString& rFilename ) override;
 
+    Okular::CertificateStore* getCertStore() override;
+
 protected:
     SwapBackingFileResult swapBackingFile(QString const &newFileName, QVector<Okular::Page *> &newPagesVector) override;
     bool doCloseDocument() override;

generators/poppler/pdfsignatureutils.h

@@ -64,4 +64,18 @@ private:
     Okular::CertificateInfo *m_certfiticateInfo;
 };
 
+#ifdef HAVE_POPPLER_SIGNING
+
+class PopplerCertificateStore : public Okular::CertificateStore
+{
+    public:
+        PopplerCertificateStore();
+        ~PopplerCertificateStore();
+
+        QList<Okular::CertificateInfo*> getSigningCertificates() const override;
+        //QList<PopplerCertificateInfo*> getSigningCertificates() const override;
+};
+
+#endif
+
 #endif

part/certificatetools.cpp

@@ -44,6 +44,15 @@ void CertificateTools::setTools(const QStringList& /*items*/)
     foreach( const QString cert, certs )
     {
         QListWidgetItem * listEntry = new QListWidgetItem( cert, m_list );
+        (void)listEntry;
+    }
+    //QVector<Poppler::CertificateInfo*> nssCerts = Poppler::getAvailableSigningCertificates();
+    Poppler::getAvailableSigningCertificates();
+    foreach( auto cert, nssCerts )
+    {
+        QListWidgetItem * listEntry = new QListWidgetItem( cert->getSubjectInfo().commonName,
+                                                           m_list );
+        (void)listEntry;
     }
 
     updateButtons();