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Diffstat (limited to 'OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/PassphraseDialogFragment.java')
-rw-r--r--OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/PassphraseDialogFragment.java328
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diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/PassphraseDialogFragment.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/PassphraseDialogFragment.java
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+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/PassphraseDialogFragment.java
@@ -0,0 +1,328 @@
+/*
+ * Copyright (C) 2012-2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.sufficientlysecure.keychain.ui.dialog;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.DialogInterface.OnClickListener;
+import android.os.Bundle;
+import android.os.Handler;
+import android.os.Message;
+import android.os.Messenger;
+import android.os.RemoteException;
+import android.support.v4.app.DialogFragment;
+import android.support.v4.app.FragmentActivity;
+import android.view.KeyEvent;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.WindowManager.LayoutParams;
+import android.view.inputmethod.EditorInfo;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.TextView;
+import android.widget.TextView.OnEditorActionListener;
+import android.widget.Toast;
+import org.spongycastle.openpgp.PGPException;
+import org.spongycastle.openpgp.PGPPrivateKey;
+import org.spongycastle.openpgp.PGPSecretKey;
+import org.spongycastle.openpgp.operator.PBESecretKeyDecryptor;
+import org.spongycastle.openpgp.operator.jcajce.JcePBESecretKeyDecryptorBuilder;
+import org.sufficientlysecure.keychain.Constants;
+import org.sufficientlysecure.keychain.Id;
+import org.sufficientlysecure.keychain.R;
+import org.sufficientlysecure.keychain.pgp.PgpKeyHelper;
+import org.sufficientlysecure.keychain.pgp.exception.PgpGeneralException;
+import org.sufficientlysecure.keychain.provider.ProviderHelper;
+import org.sufficientlysecure.keychain.service.PassphraseCacheService;
+import org.sufficientlysecure.keychain.util.Log;
+
+public class PassphraseDialogFragment extends DialogFragment implements OnEditorActionListener {
+ private static final String ARG_MESSENGER = "messenger";
+ private static final String ARG_SECRET_KEY_ID = "secret_key_id";
+
+ public static final int MESSAGE_OKAY = 1;
+ public static final int MESSAGE_CANCEL = 2;
+
+ public static final String MESSAGE_DATA_PASSPHRASE = "passphrase";
+
+ private Messenger mMessenger;
+ private EditText mPassphraseEditText;
+ private boolean mCanKB;
+
+ /**
+ * Shows passphrase dialog to cache a new passphrase the user enters for using it later for
+ * encryption. Based on mSecretKeyId it asks for a passphrase to open a private key or it asks
+ * for a symmetric passphrase
+ */
+ public static void show(FragmentActivity context, long keyId, Handler returnHandler) {
+ // Create a new Messenger for the communication back
+ Messenger messenger = new Messenger(returnHandler);
+
+ try {
+ PassphraseDialogFragment passphraseDialog = PassphraseDialogFragment.newInstance(context,
+ messenger, keyId);
+
+ passphraseDialog.show(context.getSupportFragmentManager(), "passphraseDialog");
+ } catch (PgpGeneralException e) {
+ Log.d(Constants.TAG, "No passphrase for this secret key, encrypt directly!");
+ // send message to handler to start encryption directly
+ returnHandler.sendEmptyMessage(PassphraseDialogFragment.MESSAGE_OKAY);
+ }
+ }
+
+ /**
+ * Creates new instance of this dialog fragment
+ *
+ * @param secretKeyId secret key id you want to use
+ * @param messenger to communicate back after caching the passphrase
+ * @return
+ * @throws PgpGeneralException
+ */
+ public static PassphraseDialogFragment newInstance(Context context, Messenger messenger,
+ long secretKeyId) throws PgpGeneralException {
+ // check if secret key has a passphrase
+ if (!(secretKeyId == Id.key.symmetric || secretKeyId == Id.key.none)) {
+ if (!PassphraseCacheService.hasPassphrase(context, secretKeyId)) {
+ throw new PgpGeneralException("No passphrase! No passphrase dialog needed!");
+ }
+ }
+
+ PassphraseDialogFragment frag = new PassphraseDialogFragment();
+ Bundle args = new Bundle();
+ args.putLong(ARG_SECRET_KEY_ID, secretKeyId);
+ args.putParcelable(ARG_MESSENGER, messenger);
+
+ frag.setArguments(args);
+
+ return frag;
+ }
+
+ @Override
+ public void onCreate(Bundle savedInstanceState) {
+ super.onCreate(savedInstanceState);
+ }
+
+ /**
+ * Creates dialog
+ */
+ @Override
+ public Dialog onCreateDialog(Bundle savedInstanceState) {
+ final Activity activity = getActivity();
+ final long secretKeyId = getArguments().getLong(ARG_SECRET_KEY_ID);
+ mMessenger = getArguments().getParcelable(ARG_MESSENGER);
+
+ AlertDialog.Builder alert = new AlertDialog.Builder(activity);
+
+ alert.setTitle(R.string.title_authentication);
+
+ final PGPSecretKey secretKey;
+
+ if (secretKeyId == Id.key.symmetric || secretKeyId == Id.key.none) {
+ secretKey = null;
+ alert.setMessage(R.string.passphrase_for_symmetric_encryption);
+ } else {
+ secretKey = ProviderHelper.getPGPSecretKeyRing(activity, secretKeyId).getSecretKey();
+
+ if (secretKey == null) {
+ alert.setTitle(R.string.title_key_not_found);
+ alert.setMessage(getString(R.string.key_not_found, secretKeyId));
+ alert.setPositiveButton(android.R.string.ok, new OnClickListener() {
+ public void onClick(DialogInterface dialog, int which) {
+ dismiss();
+ }
+ });
+ alert.setCancelable(false);
+ mCanKB = false;
+ return alert.create();
+ }
+ String userId = PgpKeyHelper.getMainUserIdSafe(activity, secretKey);
+
+ Log.d(Constants.TAG, "User id: '" + userId + "'");
+ alert.setMessage(getString(R.string.passphrase_for, userId));
+ }
+
+ LayoutInflater inflater = activity.getLayoutInflater();
+ View view = inflater.inflate(R.layout.passphrase_dialog, null);
+ alert.setView(view);
+
+ mPassphraseEditText = (EditText) view.findViewById(R.id.passphrase_passphrase);
+
+ alert.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
+
+ @Override
+ public void onClick(DialogInterface dialog, int id) {
+ dismiss();
+ long curKeyIndex = 1;
+ boolean keyOK = true;
+ String passphrase = mPassphraseEditText.getText().toString();
+ long keyId;
+ PGPSecretKey clickSecretKey = secretKey;
+
+ if (clickSecretKey != null) {
+ while (keyOK) {
+ if (clickSecretKey != null) { // check again for loop
+ try {
+ PBESecretKeyDecryptor keyDecryptor = new JcePBESecretKeyDecryptorBuilder()
+ .setProvider(Constants.BOUNCY_CASTLE_PROVIDER_NAME).build(
+ passphrase.toCharArray());
+ PGPPrivateKey testKey = clickSecretKey
+ .extractPrivateKey(keyDecryptor);
+ if (testKey == null) {
+ if (!clickSecretKey.isMasterKey()) {
+ Toast.makeText(activity,
+ R.string.error_could_not_extract_private_key,
+ Toast.LENGTH_SHORT).show();
+
+ sendMessageToHandler(MESSAGE_CANCEL);
+ return;
+ } else {
+ clickSecretKey = PgpKeyHelper.getKeyNum(ProviderHelper
+ .getPGPSecretKeyRingWithKeyId(activity, secretKeyId),
+ curKeyIndex);
+ curKeyIndex++; // does post-increment work like C?
+ continue;
+ }
+ } else {
+ keyOK = false;
+ }
+ } catch (PGPException e) {
+ Toast.makeText(activity, R.string.wrong_passphrase,
+ Toast.LENGTH_SHORT).show();
+
+ sendMessageToHandler(MESSAGE_CANCEL);
+ return;
+ }
+ } else {
+ Toast.makeText(activity, R.string.error_could_not_extract_private_key,
+ Toast.LENGTH_SHORT).show();
+
+ sendMessageToHandler(MESSAGE_CANCEL);
+ return; // ran out of keys to try
+ }
+ }
+ keyId = secretKey.getKeyID();
+ } else {
+ keyId = Id.key.symmetric;
+ }
+
+ // cache the new passphrase
+ Log.d(Constants.TAG, "Everything okay! Caching entered passphrase");
+ PassphraseCacheService.addCachedPassphrase(activity, keyId, passphrase);
+ if (!keyOK && clickSecretKey.getKeyID() != keyId) {
+ PassphraseCacheService.addCachedPassphrase(activity, clickSecretKey.getKeyID(),
+ passphrase);
+ }
+
+ // also return passphrase back to activity
+ Bundle data = new Bundle();
+ data.putString(MESSAGE_DATA_PASSPHRASE, passphrase);
+
+ sendMessageToHandler(MESSAGE_OKAY, data);
+ }
+ });
+
+ alert.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
+
+ @Override
+ public void onClick(DialogInterface dialog, int id) {
+ dialog.cancel();
+ }
+ });
+
+ mCanKB = true;
+ return alert.create();
+ }
+
+ @Override
+ public void onActivityCreated(Bundle arg0) {
+ super.onActivityCreated(arg0);
+ if (mCanKB) {
+ // request focus and open soft keyboard
+ mPassphraseEditText.requestFocus();
+ getDialog().getWindow().setSoftInputMode(LayoutParams.SOFT_INPUT_STATE_VISIBLE);
+
+ mPassphraseEditText.setOnEditorActionListener(this);
+ }
+ }
+
+ @Override
+ public void onCancel(DialogInterface dialog) {
+ super.onCancel(dialog);
+
+ dismiss();
+ sendMessageToHandler(MESSAGE_CANCEL);
+ }
+
+ /**
+ * Associate the "done" button on the soft keyboard with the okay button in the view
+ */
+ @Override
+ public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
+ if (EditorInfo.IME_ACTION_DONE == actionId) {
+ AlertDialog dialog = ((AlertDialog) getDialog());
+ Button bt = dialog.getButton(AlertDialog.BUTTON_POSITIVE);
+
+ bt.performClick();
+ return true;
+ }
+ return false;
+ }
+
+ /**
+ * Send message back to handler which is initialized in a activity
+ *
+ * @param what Message integer you want to send
+ */
+ private void sendMessageToHandler(Integer what) {
+ Message msg = Message.obtain();
+ msg.what = what;
+
+ try {
+ mMessenger.send(msg);
+ } catch (RemoteException e) {
+ Log.w(Constants.TAG, "Exception sending message, Is handler present?", e);
+ } catch (NullPointerException e) {
+ Log.w(Constants.TAG, "Messenger is null!", e);
+ }
+ }
+
+ /**
+ * Send message back to handler which is initialized in a activity
+ *
+ * @param what Message integer you want to send
+ */
+ private void sendMessageToHandler(Integer what, Bundle data) {
+ Message msg = Message.obtain();
+ msg.what = what;
+ if (data != null) {
+ msg.setData(data);
+ }
+
+ try {
+ mMessenger.send(msg);
+ } catch (RemoteException e) {
+ Log.w(Constants.TAG, "Exception sending message, Is handler present?", e);
+ } catch (NullPointerException e) {
+ Log.w(Constants.TAG, "Messenger is null!", e);
+ }
+ }
+
+}
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