Ssh: Get confirmation from user for overwriting an existing key.

Change-Id: I3d74423ef647fd59d303517b0a0e987b24973095
Reviewed-by: Robert Loehning <robert.loehning@digia.com>

src/libs/ssh/sshkeycreationdialog.cpp

@@ -69,6 +69,9 @@ void SshKeyCreationDialog::keyTypeChanged()
 
 void SshKeyCreationDialog::generateKeys()
 {
+    if (userForbidsOverwriting())
+        return;
+
     const SshKeyGenerator::KeyType keyType = m_ui->rsa->isChecked()
         ? SshKeyGenerator::Rsa
         : SshKeyGenerator::Dsa;
@@ -130,6 +133,16 @@ void SshKeyCreationDialog::saveKeys()
     accept();
 }
 
+bool SshKeyCreationDialog::userForbidsOverwriting()
+{
+    if (!QFileInfo(privateKeyFilePath()).exists() && !QFileInfo(publicKeyFilePath()).exists())
+        return false;
+    const QMessageBox::StandardButton reply = QMessageBox::question(this, tr("File Exists"),
+            tr("There already is a file of that name. Do you want to overwrite it?"),
+            QMessageBox::Yes | QMessageBox::No, QMessageBox::No);
+    return reply != QMessageBox::Yes;
+}
+
 QString SshKeyCreationDialog::privateKeyFilePath() const
 {
     return m_ui->privateKeyFileValueLabel->text();

src/libs/ssh/sshkeycreationdialog.h

@@ -57,6 +57,7 @@ private slots:
 private:
     void setPrivateKeyFile(const QString &filePath);
     void saveKeys();
+    bool userForbidsOverwriting();
 
 private:
     SshKeyGenerator *m_keyGenerator;