Add option to remove manually approved certificates

- "Remove certificates" option brings up a dialog that allows
  to delete certificates from MemorizingTrustManager's keystore
- Reconnect active accounts when certificate-settings are changed
- new preference category "Certificate options"

1 files changed, 91 insertions, 0 deletions

diff --git a/src/main/java/eu/siacs/conversations/ui/SettingsActivity.java b/src/main/java/eu/siacs/conversations/ui/SettingsActivity.java
index f91bc9536..eb5d9b2e0 100644
--- a/src/main/java/eu/siacs/conversations/ui/SettingsActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/SettingsActivity.java
@@ -1,20 +1,29 @@
 package eu.siacs.conversations.ui;
 
+import java.security.KeyStoreException;
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collections;
 import java.util.Locale;
 
+import de.duenndns.ssl.MemorizingTrustManager;
+
+import eu.siacs.conversations.R;
 import eu.siacs.conversations.entities.Account;
 import eu.siacs.conversations.xmpp.XmppConnection;
 
+import android.app.AlertDialog;
 import android.app.Fragment;
 import android.app.FragmentManager;
+import android.content.DialogInterface;
 import android.content.SharedPreferences;
 import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
 import android.os.Build;
 import android.os.Bundle;
 import android.preference.ListPreference;
+import android.preference.Preference;
 import android.preference.PreferenceManager;
+import android.widget.Toast;
 
 public class SettingsActivity extends XmppActivity implements
 		OnSharedPreferenceChangeListener {
@@ -49,6 +58,68 @@ public class SettingsActivity extends XmppActivity implements
 				resources.setEntryValues(entries.toArray(new CharSequence[entries.size()]));
 			}
 		}
+
+		final Preference removeCertsPreference = mSettingsFragment.findPreference("remove_trusted_certificates");
+		removeCertsPreference.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
+			@Override
+			public boolean onPreferenceClick(Preference preference) {
+				final MemorizingTrustManager mtm = xmppConnectionService.getMemorizingTrustManager();
+				final ArrayList<String> aliases = Collections.list(mtm.getCertificates());
+				if (aliases.size() == 0) {
+					displayToast(getString(R.string.toast_no_trusted_certs));
+					return true;
+				}
+				final ArrayList selectedItems = new ArrayList<Integer>();
+				final AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(SettingsActivity.this);
+				dialogBuilder.setTitle(getResources().getString(R.string.dialog_manage_certs_title));
+				dialogBuilder.setMultiChoiceItems(aliases.toArray(new CharSequence[aliases.size()]), null,
+						new DialogInterface.OnMultiChoiceClickListener() {
+							@Override
+							public void onClick(DialogInterface dialog, int indexSelected,
+												boolean isChecked) {
+								if (isChecked) {
+									selectedItems.add(indexSelected);
+								} else if (selectedItems.contains(indexSelected)) {
+									selectedItems.remove(Integer.valueOf(indexSelected));
+								}
+								if (selectedItems.size() > 0)
+									((AlertDialog) dialog).getButton(DialogInterface.BUTTON_POSITIVE).setEnabled(true);
+								else {
+									((AlertDialog) dialog).getButton(DialogInterface.BUTTON_POSITIVE).setEnabled(false);
+								}
+							}
+						});
+
+				dialogBuilder.setPositiveButton(
+						getResources().getString(R.string.dialog_manage_certs_positivebutton), new DialogInterface.OnClickListener() {
+							@Override
+							public void onClick(DialogInterface dialog, int which) {
+								int count = selectedItems.size();
+								if (count > 0) {
+									for (int i = 0; i < count; i++) {
+										try {
+											Integer item = Integer.valueOf(selectedItems.get(i).toString());
+											String alias = aliases.get(item);
+											mtm.deleteCertificate(alias);
+										} catch (KeyStoreException e) {
+											e.printStackTrace();
+											displayToast("Error: " + e.getLocalizedMessage());
+										}
+									}
+									if (xmppConnectionServiceBound) {
+										reconnectAccounts();
+									}
+									displayToast(getResources().getQuantityString(R.plurals.toast_delete_certificates, count, count));
+								}
+							}
+						});
+				dialogBuilder.setNegativeButton(getResources().getString(R.string.dialog_manage_certs_negativebutton), null);
+				AlertDialog removeCertsDialog = dialogBuilder.create();
+				removeCertsDialog.show();
+				removeCertsDialog.getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(false);
+				return true;
+			}
+		});
 	}
 
 	@Override
@@ -89,6 +160,26 @@ public class SettingsActivity extends XmppActivity implements
 			}
 		} else if (name.equals("dont_trust_system_cas")) {
 			xmppConnectionService.updateMemorizingTrustmanager();
+			reconnectAccounts();
+		}
+
+	}
+
+	private void displayToast(final String msg) {
+		runOnUiThread(new Runnable() {
+			@Override
+			public void run() {
+				Toast.makeText(SettingsActivity.this, msg, Toast.LENGTH_LONG).show();
+			}
+		});
+	}
+
+	private void reconnectAccounts() {
+		for (Account account : xmppConnectionService.getAccounts()) {
+			if (!account.isOptionSet(Account.OPTION_DISABLED)) {
+				xmppConnectionService.reconnectAccountInBackground(account);
+			}
 		}
 	}
+
 }