diff options
Diffstat (limited to 'org_apg/src/org/thialfihar/android/apg/ui/dialog/FileDialogFragment.java')
| -rw-r--r-- | org_apg/src/org/thialfihar/android/apg/ui/dialog/FileDialogFragment.java | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/org_apg/src/org/thialfihar/android/apg/ui/dialog/FileDialogFragment.java b/org_apg/src/org/thialfihar/android/apg/ui/dialog/FileDialogFragment.java new file mode 100644 index 000000000..ff4052257 --- /dev/null +++ b/org_apg/src/org/thialfihar/android/apg/ui/dialog/FileDialogFragment.java @@ -0,0 +1,211 @@ +/* + * Copyright (C) 2012 Dominik Schürmann <dominik@dominikschuermann.de> + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.thialfihar.android.apg.ui.dialog; + +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.thialfihar.android.apg.Apg; +import org.thialfihar.android.apg.Apg.GeneralException; +import org.thialfihar.android.apg.Constants; +import org.thialfihar.android.apg.Id; +import org.thialfihar.android.apg.R; + +import android.app.Activity; +import android.app.AlertDialog; +import android.app.Dialog; +import android.content.DialogInterface; +import android.content.DialogInterface.OnClickListener; +import android.os.Bundle; +import android.os.Message; +import android.os.Messenger; +import android.os.RemoteException; +import android.support.v4.app.DialogFragment; +import android.util.Log; +import android.view.LayoutInflater; +import android.view.View; +import android.widget.EditText; +import android.widget.TextView; +import android.widget.Toast; + +public class FileDialogFragment extends DialogFragment { + + private Messenger mMessenger; + + 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; + + /** + * Instantiates new instance of this dialog fragment + * + */ + public static FileDialogFragment newInstance(long secretKeyId, Messenger messenger){ + FileDialogFragment frag = new FileDialogFragment(); + Bundle args = new Bundle(); + args.putLong(ARG_SECRET_KEY_ID, secretKeyId); + args.putParcelable(ARG_MESSENGER, messenger); + + frag.setArguments(args); + + return frag; + } + + /** + * Checks if key has a passphrase + * + * @param secretKeyId + * @return true if it has a passphrase + */ + private static boolean hasPassphrase(long secretKeyId) { + // check if the key has no passphrase + try { + PGPSecretKey secretKey = Apg.getMasterKey(Apg.getSecretKeyRing(secretKeyId)); + + Log.d(Constants.TAG, "Check if key has no passphrase..."); + PBESecretKeyDecryptor keyDecryptor = new JcePBESecretKeyDecryptorBuilder().setProvider( + "SC").build("".toCharArray()); + PGPPrivateKey testKey = secretKey.extractPrivateKey(keyDecryptor); + if (testKey != null) { + Log.d(Constants.TAG, "Key has no passphrase! Caches empty passphrase!"); + + // cache empty passphrase + Apg.setCachedPassPhrase(secretKey.getKeyID(), ""); + + return false; + } + } catch (PGPException e) { + // silently catch + } + + return true; + } + + /** + * Creates dialog + */ + @Override + public Dialog onCreateDialog(Bundle savedInstanceState) { + final Activity activity = getActivity(); + + 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(getString(R.string.passPhraseForSymmetricEncryption)); + } else { + secretKey = Apg.getMasterKey(Apg.getSecretKeyRing(secretKeyId)); + if (secretKey == null) { + alert.setTitle(R.string.title_keyNotFound); + alert.setMessage(getString(R.string.keyNotFound, secretKeyId)); + alert.setPositiveButton(android.R.string.ok, new OnClickListener() { + public void onClick(DialogInterface dialog, int which) { + dismiss(); + } + }); + alert.setCancelable(false); + return alert.create(); + } + String userId = Apg.getMainUserIdSafe(activity, secretKey); + alert.setMessage(getString(R.string.passPhraseFor, userId)); + } + + LayoutInflater inflater = activity.getLayoutInflater(); + View view = inflater.inflate(R.layout.passphrase, null); + final EditText input = (EditText) view.findViewById(R.id.passphrase_passphrase); + + final TextView labelNotUsed = (TextView) view + .findViewById(R.id.passphrase_label_passphrase_again); + labelNotUsed.setVisibility(View.GONE); + final EditText inputNotUsed = (EditText) view + .findViewById(R.id.passphrase_passphrase_again); + inputNotUsed.setVisibility(View.GONE); + + alert.setView(view); + + alert.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() { + public void onClick(DialogInterface dialog, int id) { + dismiss(); + + String passPhrase = input.getText().toString(); + long keyId; + if (secretKey != null) { + try { + PBESecretKeyDecryptor keyDecryptor = new JcePBESecretKeyDecryptorBuilder() + .setProvider("SC").build(passPhrase.toCharArray()); + PGPPrivateKey testKey = secretKey.extractPrivateKey(keyDecryptor); + if (testKey == null) { + Toast.makeText(activity, R.string.error_couldNotExtractPrivateKey, + Toast.LENGTH_SHORT).show(); + return; + } + } catch (PGPException e) { + Toast.makeText(activity, R.string.wrongPassPhrase, Toast.LENGTH_SHORT) + .show(); + return; + } + keyId = secretKey.getKeyID(); + } else { + keyId = Id.key.symmetric; + } + + // cache the new passphrase + Log.d(Constants.TAG, "Everything okay! Caching entered passphrase"); + Apg.setCachedPassPhrase(keyId, passPhrase); + + sendMessageToHandler(MESSAGE_OKAY); + } + }); + + alert.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() { + public void onClick(DialogInterface dialog, int id) { + dismiss(); + } + }); + + return alert.create(); + } + + /** + * 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); + } + } +}
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