tls-psk: show warning dialog before actually sending a key

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/transfer/presenter/TransferPresenter.java

@@ -73,6 +73,7 @@ public class TransferPresenter implements KeyTransferCallback, LoaderCallbacks<L
     private final TransferMvpView view;
     private final LoaderManager loaderManager;
     private final int loaderId;
+    private final KeyRepository databaseInteractor;
 
     private final TransferKeyAdapter secretKeyAdapter;
     private final ReceivedKeyAdapter receivedKeyAdapter;
@@ -84,6 +85,7 @@ public class TransferPresenter implements KeyTransferCallback, LoaderCallbacks<L
     private boolean wasConnected = false;
     private boolean sentData = false;
     private boolean waitingForWifi = false;
+    private Long confirmingMasterKeyId;
 
 
     public TransferPresenter(Context context, LoaderManager loaderManager, int loaderId, TransferMvpView view) {
@@ -91,6 +93,7 @@ public class TransferPresenter implements KeyTransferCallback, LoaderCallbacks<L
         this.view = view;
         this.loaderManager = loaderManager;
         this.loaderId = loaderId;
+        this.databaseInteractor = KeyRepository.createDatabaseInteractor(context);
 
         secretKeyAdapter = new TransferKeyAdapter(context, LayoutInflater.from(context), this);
         view.setSecretKeyAdapter(secretKeyAdapter);
@@ -117,6 +120,7 @@ public class TransferPresenter implements KeyTransferCallback, LoaderCallbacks<L
 
         if (wasConnected) {
             view.showViewDisconnected();
+            view.dismissConfirmationIfExists();
             secretKeyAdapter.setAllDisabled(true);
         }
     }
@@ -143,17 +147,24 @@ public class TransferPresenter implements KeyTransferCallback, LoaderCallbacks<L
 
     @Override
     public void onUiClickTransferKey(long masterKeyId) {
-        try {
-            byte[] armoredSecretKey =
-                    KeyRepository.createDatabaseInteractor(context).getSecretKeyRingAsArmoredData(masterKeyId);
-            secretKeyAdapter.focusItem(masterKeyId);
-            connectionSend(armoredSecretKey, Long.toString(masterKeyId));
-        } catch (IOException | NotFoundException | PgpGeneralException e) {
-            // TODO
-            e.printStackTrace();
+        if (sentData) {
+            prepareAndSendKey(masterKeyId);
+        } else {
+            confirmingMasterKeyId = masterKeyId;
+            view.showConfirmSendDialog();
         }
     }
 
+    public void onUiClickConfirmSend() {
+        if (confirmingMasterKeyId == null) {
+            return;
+        }
+        long masterKeyId = confirmingMasterKeyId;
+        confirmingMasterKeyId = null;
+
+        prepareAndSendKey(masterKeyId);
+    }
+
     @Override
     public void onUiClickImportKey(final long masterKeyId, String keyData) {
         receivedKeyAdapter.focusItem(masterKeyId);
@@ -227,9 +238,13 @@ public class TransferPresenter implements KeyTransferCallback, LoaderCallbacks<L
     @Override
     public void onConnectionLost() {
         if (!wasConnected) {
-            view.showErrorConnectionFailed();
             checkWifiResetAndStartListen();
+
+            view.showErrorConnectionFailed();
         } else {
+            connectionClear();
+
+            view.dismissConfirmationIfExists();
             view.showViewDisconnected();
             secretKeyAdapter.setAllDisabled(true);
         }
@@ -349,6 +364,17 @@ public class TransferPresenter implements KeyTransferCallback, LoaderCallbacks<L
         }
     }
 
+    private void prepareAndSendKey(long masterKeyId) {
+        try {
+            byte[] armoredSecretKey = databaseInteractor.getSecretKeyRingAsArmoredData(masterKeyId);
+            secretKeyAdapter.focusItem(masterKeyId);
+            connectionSend(armoredSecretKey, Long.toString(masterKeyId));
+        } catch (IOException | NotFoundException | PgpGeneralException e) {
+            // TODO
+            e.printStackTrace();
+        }
+    }
+
     private void connectionSend(byte[] armoredSecretKey, String passthrough) {
         sentData = true;
         if (keyTransferClientInteractor != null) {
@@ -407,5 +433,8 @@ public class TransferPresenter implements KeyTransferCallback, LoaderCallbacks<L
         void addFakeBackStackItem(String tag);
 
         void finishFragmentOrActivity();
+
+        void showConfirmSendDialog();
+        void dismissConfirmationIfExists();
     }
 }

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/transfer/view/TransferFragment.java

@@ -21,6 +21,8 @@ package org.sufficientlysecure.keychain.ui.transfer.view;
 import android.app.Activity;
 import android.content.BroadcastReceiver;
 import android.content.Context;
+import android.content.DialogInterface;
+import android.content.DialogInterface.OnDismissListener;
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.graphics.Bitmap;
@@ -36,6 +38,8 @@ import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentActivity;
 import android.support.v4.app.FragmentManager;
 import android.support.v4.app.FragmentManager.OnBackStackChangedListener;
+import android.support.v7.app.AlertDialog;
+import android.support.v7.app.AlertDialog.Builder;
 import android.support.v7.widget.RecyclerView;
 import android.support.v7.widget.RecyclerView.Adapter;
 import android.view.LayoutInflater;
@@ -103,6 +107,7 @@ public class TransferFragment extends Fragment implements TransferMvpView {
         }
     };
     private boolean showDoneIcon;
+    private AlertDialog confirmationDialog;
 
     @Override
     public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
@@ -358,6 +363,41 @@ public class TransferFragment extends Fragment implements TransferMvpView {
         }
     }
 
+    @Override
+    public void showConfirmSendDialog() {
+        if (confirmationDialog != null) {
+            return;
+        }
+        confirmationDialog = new Builder(getContext())
+                .setTitle(R.string.transfer_confirm_title)
+                .setMessage(R.string.transfer_confirm_text)
+                .setPositiveButton(R.string.transfer_confirm_ok, new DialogInterface.OnClickListener() {
+                    public void onClick(DialogInterface dialog, int whichButton) {
+                        if (whichButton == DialogInterface.BUTTON_POSITIVE) {
+                            presenter.onUiClickConfirmSend();
+                        } else {
+                            dialog.dismiss();
+                        }
+                    }
+                })
+                .setNegativeButton(R.string.transfer_confirm_cancel, null)
+                .setOnDismissListener(new OnDismissListener() {
+                    @Override
+                    public void onDismiss(DialogInterface dialog) {
+                        confirmationDialog = null;
+                    }
+                })
+                .create();
+        confirmationDialog.show();
+    }
+
+    @Override
+    public void dismissConfirmationIfExists() {
+        if (confirmationDialog != null && confirmationDialog.isShowing()) {
+            confirmationDialog.dismiss();
+        }
+    }
+
     @Override
     public void onActivityResult(int requestCode, int resultCode, Intent data) {
         if (currentCryptoOperationHelper != null &&

OpenKeychain/src/main/res/values/strings.xml

@@ -1904,8 +1904,12 @@
     <string name="transfer_error_generic">"Unknown communication error!"</string>
     <string name="transfer_error_generic_msg">"Communication error: %s"</string>
     <string name="transfer_not_available">"Sorry, this feature can only be used on Android 5 or newer :("</string>
-    <string name="transfer_list_empty">No keys on this device that could be sent.  Waiting for incoming keys…</string>
-    <string name="transfer_connecting">Connecting…</string>
-    <string name="first_time_secure_device_setup">Secure Device Setup</string>
+    <string name="transfer_list_empty">"No keys on this device that could be sent.  Waiting for incoming keys…"</string>
+    <string name="transfer_connecting">"Connecting…"</string>
+    <string name="first_time_secure_device_setup">"Secure Device Setup"</string>
+    <string name="transfer_confirm_cancel">"Cancel"</string>
+    <string name="transfer_confirm_ok">"Send"</string>
+    <string name="transfer_confirm_title">"Send your key?"</string>
+    <string name="transfer_confirm_text">"This will transfer full access to your key to the connected device. You should never send your own keys to devices you don't own!"</string>
 
 </resources>