better handling of DH parameter generation - added new class DHParam, default DH param file dhparam4096.pem

git-svn-id: svn://localhost/project_picapica/trunk@277 fb96df88-216d-11de-830c-f3023f12d8ac

1 files changed, 95 insertions, 0 deletions

diff --git a/pica-client/dhparam.cpp b/pica-client/dhparam.cpp
new file mode 100644
index 0000000..0c3af31
--- /dev/null
+++ b/pica-client/dhparam.cpp
@@ -0,0 +1,95 @@
+#include "dhparam.h"
+#include <QFile>
+#include <QDir>
+
+
+DHParam *DHParam::dhparamgenerator = NULL;
+QString DHParam::current_dhparam_file;
+
+DHParam::DHParam(QObject *parent) :
+    QObject(parent)
+{
+}
+
+
+bool DHParam::VerifyDefault(QString *errormsg)
+{
+    if (!QFile::exists(config_defaultDHParam))
+    {
+        if (errormsg)
+            *errormsg =
+                QString(tr("Diffie-Hellman parameters file \"%1\" does not exist"))
+                .arg(config_defaultDHParam);
+
+        return false;
+    }
+
+    return true;
+}
+
+bool DHParam::VerifyGenerated(QString *errormsg)
+{
+    if (!QFile::exists(config_dir + QDir::separator() + PICA_CLIENT_DHPARAMFILE))
+        return false;
+
+    return true;
+}
+
+bool DHParam::UseDefault()
+{
+    return QFile::copy(config_defaultDHParam, config_dir + QDir::separator() + PICA_CLIENT_DHPARAMFILE);
+}
+
+bool DHParam::StartNewDHParamGeneration(QString *errormsg)
+{
+    if (dhparamgenerator)
+    {
+    if (errormsg)
+        *errormsg = QString(tr("Diffie-Hellman parameter generation process is already running"));
+        return false;
+    }
+
+    dhparamgenerator = new DHParam();
+
+    if (!dhparamgenerator)
+        return false;
+
+    QString tempdhfile = config_dir + QDir::separator() + PICA_CLIENT_DHPARAMFILE + ".temp";
+
+    if (QFile::exists(tempdhfile))
+        QFile::remove(tempdhfile);
+
+    return dhparamgenerator -> osslt.GenDHParamSignal(PICA_CLIENT_DHPARAMBITS,
+                    tempdhfile, dhparamgenerator, SLOT(DHParamGenFinished(int,QProcess::ExitStatus)));
+}
+
+QString DHParam::GetDHParamFilename()
+{
+    if (current_dhparam_file.isEmpty())
+    {
+        if (QFile::exists(config_dir + QDir::separator() + PICA_CLIENT_DHPARAMFILE))
+            current_dhparam_file = config_dir + QDir::separator() + PICA_CLIENT_DHPARAMFILE;
+        else
+            current_dhparam_file = config_defaultDHParam;
+    }
+
+    return current_dhparam_file;
+}
+
+void DHParam::DHParamGenFinished(int retval, QProcess::ExitStatus)
+{
+    if (retval == 0)
+    {
+        if (QFile::exists(config_dir + QDir::separator() + PICA_CLIENT_DHPARAMFILE))
+            QFile::remove(config_dir + QDir::separator() + PICA_CLIENT_DHPARAMFILE);
+
+        QFile::rename(config_dir + QDir::separator() + PICA_CLIENT_DHPARAMFILE + ".temp",
+                        config_dir + QDir::separator() + PICA_CLIENT_DHPARAMFILE);
+
+        current_dhparam_file = config_dir + QDir::separator() + PICA_CLIENT_DHPARAMFILE;
+
+        delete dhparamgenerator;
+
+        dhparamgenerator = NULL;
+    }
+}