Merge pull request #432 from nextcloud/feature/157/show_mnemonic

Add a button to E2E accounts to show the mnemonic

src/gui/accountsettings.cpp

@@ -115,6 +115,7 @@ AccountSettings::AccountSettings(AccountState *accountState, QWidget *parent)
     , _wasDisabledBefore(false)
     , _accountState(accountState)
     , _quotaInfo(accountState)
+    , _menuShown(false)
 {
     ui->setupUi(this);
 
@@ -189,12 +190,19 @@ AccountSettings::AccountSettings(AccountState *accountState, QWidget *parent)
 
     connect(&_quotaInfo, &QuotaInfo::quotaUpdated,
         this, &AccountSettings::slotUpdateQuota);
+
+    // Connect E2E stuff
+    connect(this, &AccountSettings::requesetMnemonic, _accountState->account()->e2e(), &ClientSideEncryption::slotRequestMnemonic);
+    connect(_accountState->account()->e2e(), &ClientSideEncryption::showMnemonic, this, &AccountSettings::slotShowMnemonic);
 }
 
 
 void AccountSettings::createAccountToolbox()
 {
     QMenu *menu = new QMenu();
+
+    connect(menu, &QMenu::aboutToShow, this, &AccountSettings::slotMenuBeforeShow);
+
     _addAccountAction = new QAction(tr("Add new"), this);
     menu->addAction(_addAccountAction);
     connect(_addAccountAction, &QAction::triggered, this, &AccountSettings::slotOpenAccountWizard);
@@ -214,6 +222,24 @@ void AccountSettings::createAccountToolbox()
     slotAccountAdded(_accountState);
 }
 
+void AccountSettings::slotMenuBeforeShow() {
+    if (_menuShown) {
+        return;
+    }
+
+    auto menu = ui->_accountToolbox->menu();
+
+    // We can't check this during the initial creation as there is no account yet then
+    if (_accountState->account()->capabilities().clientSideEncryptionAvaliable()) {
+        QAction *mnemonic = new QAction(tr("Show E2E mnemonic"), this);
+        connect(mnemonic, &QAction::triggered, this, &AccountSettings::requesetMnemonic);
+        menu->addAction(mnemonic);
+    }
+
+    _menuShown = true;
+}
+
+
 QString AccountSettings::selectedFolderAlias() const
 {
     QModelIndex selected = ui->_folderList->selectionModel()->currentIndex();
@@ -257,6 +283,13 @@ void AccountSettings::doExpand()
     ui->_folderList->expandToDepth(0);
 }
 
+void AccountSettings::slotShowMnemonic(const QString &mnemonic) {
+    QMessageBox msgBox;
+    msgBox.setText(tr("Your end to end encryption mnemonic is:"));
+    msgBox.setInformativeText(mnemonic);
+    msgBox.exec();
+}
+
 void AccountSettings::slotEncryptionFlagSuccess(const QByteArray& fileId)
 {
     if (auto info = _model->infoForFileId(fileId)) {

src/gui/accountsettings.h

@@ -62,6 +62,7 @@ signals:
     void folderChanged();
     void openFolderAlias(const QString &);
     void showIssuesList(const QString &folderAlias);
+    void requesetMnemonic();
 
 public slots:
     void slotOpenOC();
@@ -94,15 +95,19 @@ protected slots:
     void doExpand();
     void slotLinkActivated(const QString &link);
 
+    void slotMenuBeforeShow();
+
     // Encryption Related Stuff.
+    void slotShowMnemonic(const QString &mnemonic);
+
     void slotEncryptionFlagSuccess(const QByteArray &folderId);
     void slotEncryptionFlagError(const QByteArray &folderId, int httpReturnCode);
     void slotLockForEncryptionSuccess(const QByteArray& folderId, const QByteArray& token);
     void slotLockForEncryptionError(const QByteArray &folderId, int httpReturnCode);
     void slotUnlockFolderSuccess(const QByteArray& folderId);
     void slotUnlockFolderError(const QByteArray& folderId, int httpReturnCode);
-		void slotUploadMetadataSuccess(const QByteArray& folderId);
-		void slotUpdateMetadataError(const QByteArray& folderId, int httpReturnCode);
+    void slotUploadMetadataSuccess(const QByteArray& folderId);
+    void slotUpdateMetadataError(const QByteArray& folderId, int httpReturnCode);
 
     // Remove Encryotion Bit.
     void slotLockForDecryptionSuccess(const QByteArray& folderId, const QByteArray& token);
@@ -132,6 +137,8 @@ private:
     QuotaInfo _quotaInfo;
     QAction *_toggleSignInOutAction;
     QAction *_addAccountAction;
+
+    bool _menuShown;
 };
 
 } // namespace OCC

src/libsync/clientsideencryption.cpp

@@ -809,6 +809,10 @@ void ClientSideEncryption::forgetSensitiveData()
     startDeleteJob(user + e2e_mnemonic);
 }
 
+void ClientSideEncryption::slotRequestMnemonic() {
+    emit showMnemonic(_mnemonic);
+}
+
 bool ClientSideEncryption::hasPrivateKey() const
 {
     return !_privateKey.isNull();

src/libsync/clientsideencryption.h

@@ -87,6 +87,9 @@ public:
 
     void forgetSensitiveData();
 
+public slots:
+    void slotRequestMnemonic();
+
 private slots:
     void folderEncryptedStatusFetched(const QMap<QString, bool> &values);
     void folderEncryptedStatusError(int error);
@@ -98,6 +101,7 @@ private slots:
 signals:
     void initializationFinished();
     void mnemonicGenerated(const QString& mnemonic);
+    void showMnemonic(const QString& mnemonic);
 
 private:
     void getPrivateKeyFromServer();