344 lines
13 KiB
Java
344 lines
13 KiB
Java
/*
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* Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.thialfihar.android.apg;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.io.InputStream;
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import java.security.Security;
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import java.security.SignatureException;
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import java.util.regex.Matcher;
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import org.bouncycastle2.jce.provider.BouncyCastleProvider;
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import org.bouncycastle2.openpgp.PGPException;
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import org.bouncycastle2.util.Strings;
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import android.app.Activity;
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import android.app.Dialog;
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import android.app.ProgressDialog;
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import android.content.Intent;
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import android.net.Uri;
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import android.os.Bundle;
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import android.os.Handler;
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import android.os.Message;
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import android.text.ClipboardManager;
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import android.view.View;
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import android.view.View.OnClickListener;
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import android.widget.Button;
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import android.widget.EditText;
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import android.widget.ImageView;
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import android.widget.LinearLayout;
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import android.widget.TextView;
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import android.widget.Toast;
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public class DecryptMessageActivity extends Activity
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implements Runnable, ProgressDialogUpdater,
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AskForSecretKeyPassPhrase.PassPhraseCallbackInterface {
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static final int GET_PUCLIC_KEYS = 1;
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static final int GET_SECRET_KEY = 2;
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static final int DIALOG_DECRYPTING = 1;
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static final int MESSAGE_PROGRESS_UPDATE = 1;
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static final int MESSAGE_DONE = 2;
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private long mDecryptionKeyId = 0;
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private long mSignatureKeyId = 0;
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private String mReplyTo = null;
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private String mSubject = null;
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private ProgressDialog mProgressDialog = null;
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private Thread mRunningThread = null;
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private EditText mMessage = null;
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private LinearLayout mSignatureLayout = null;
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private ImageView mSignatureStatusImage = null;
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private TextView mUserId = null;
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private TextView mUserIdRest = null;
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private Button mDecryptButton = null;
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private Handler mHandler = new Handler() {
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@Override
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public void handleMessage(Message msg) {
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Bundle data = msg.getData();
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if (data != null) {
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int type = data.getInt("type");
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switch (type) {
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case MESSAGE_PROGRESS_UPDATE: {
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String message = data.getString("message");
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if (mProgressDialog != null) {
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if (message != null) {
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mProgressDialog.setMessage(message);
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}
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mProgressDialog.setMax(data.getInt("max"));
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mProgressDialog.setProgress(data.getInt("progress"));
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}
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break;
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}
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case MESSAGE_DONE: {
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removeDialog(DIALOG_DECRYPTING);
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mProgressDialog = null;
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mSignatureKeyId = 0;
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String error = data.getString("error");
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String decryptedMessage = data.getString("decryptedMessage");
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if (error != null) {
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Toast.makeText(DecryptMessageActivity.this,
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"Error: " + data.getString("error"),
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Toast.LENGTH_SHORT).show();
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}
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mSignatureLayout.setVisibility(View.INVISIBLE);
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if (decryptedMessage != null) {
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mMessage.setText(decryptedMessage);
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mDecryptButton.setText(R.string.btn_reply);
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mDecryptButton.setOnClickListener(new OnClickListener() {
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@Override
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public void onClick(View v) {
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replyClicked();
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}
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});
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if (data.getBoolean("signature")) {
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String userId = data.getString("signatureUserId");
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mSignatureKeyId = data.getLong("signatureKeyId");
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mUserIdRest.setText("id: " +
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Long.toHexString(mSignatureKeyId & 0xffffffffL));
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if (userId == null) {
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userId =
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getResources()
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.getString(
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R.string.unknown_user_id);
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}
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String chunks[] = userId.split(" <", 2);
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userId = chunks[0];
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if (chunks.length > 1) {
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mUserIdRest.setText("<" + chunks[1]);
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}
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mUserId.setText(userId);
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if (data.getBoolean("signatureSuccess")) {
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mSignatureStatusImage.setImageResource(R.drawable.overlay_ok);
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} else if (data.getBoolean("signatureUnknown")) {
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mSignatureStatusImage.setImageResource(R.drawable.overlay_error);
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} else {
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mSignatureStatusImage.setImageResource(R.drawable.overlay_error);
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}
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mSignatureLayout.setVisibility(View.VISIBLE);
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}
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}
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break;
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}
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}
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}
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}
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};
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@Override
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public void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.decrypt_message);
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Apg.initialize(this);
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mMessage = (EditText) findViewById(R.id.message);
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mDecryptButton = (Button) findViewById(R.id.btn_decrypt);
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mSignatureLayout = (LinearLayout) findViewById(R.id.layout_signature);
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mSignatureStatusImage = (ImageView) findViewById(R.id.ic_signature_status);
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mUserId = (TextView) findViewById(R.id.main_user_id);
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mUserIdRest = (TextView) findViewById(R.id.main_user_id_rest);
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Intent intent = getIntent();
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if (intent.getAction() != null && intent.getAction().equals(Intent.ACTION_VIEW)) {
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Uri uri = intent.getData();
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try {
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InputStream attachment = getContentResolver().openInputStream(uri);
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ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
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byte bytes[] = new byte[1 << 16];
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int length;
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while ((length = attachment.read(bytes)) > 0) {
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byteOut.write(bytes, 0, length);
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}
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byteOut.close();
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String data = Strings.fromUTF8ByteArray(byteOut.toByteArray());
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mMessage.setText(data);
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} catch (FileNotFoundException e) {
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// ignore, then
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} catch (IOException e) {
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// ignore, then
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}
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} else if (intent.getAction() != null && intent.getAction().equals(Apg.Intent.DECRYPT)) {
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String data = intent.getExtras().getString("data");
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if (data != null) {
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Matcher matcher = Apg.PGP_MESSAGE.matcher(data);
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if (matcher.matches()) {
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data = matcher.group(1);
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mMessage.setText(data);
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}
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}
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mReplyTo = intent.getExtras().getString("replyTo");
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mSubject = intent.getExtras().getString("subject");
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} else {
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ClipboardManager clip = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
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String data = "";
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Matcher matcher = Apg.PGP_MESSAGE.matcher(clip.getText());
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if (matcher.matches()) {
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data = matcher.group(1);
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mMessage.setText(data);
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Toast.makeText(this, R.string.using_clipboard_content, Toast.LENGTH_SHORT).show();
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}
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}
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mSignatureLayout.setVisibility(View.INVISIBLE);
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mDecryptButton.setOnClickListener(new OnClickListener() {
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@Override
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public void onClick(View v) {
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decryptClicked();
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}
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});
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if (mMessage.getText().length() > 0) {
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mDecryptButton.performClick();
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}
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}
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@Override
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protected Dialog onCreateDialog(int id) {
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switch (id) {
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case DIALOG_DECRYPTING: {
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mProgressDialog = new ProgressDialog(this);
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mProgressDialog.setMessage("initializing...");
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mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
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mProgressDialog.setCancelable(false);
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return mProgressDialog;
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}
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case AskForSecretKeyPassPhrase.DIALOG_PASS_PHRASE: {
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return AskForSecretKeyPassPhrase.createDialog(this, mDecryptionKeyId, this);
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}
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}
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return super.onCreateDialog(id);
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}
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@Override
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public void setProgress(int progress, int max) {
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Message msg = new Message();
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Bundle data = new Bundle();
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data.putInt("type", MESSAGE_PROGRESS_UPDATE);
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data.putInt("progress", progress);
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data.putInt("max", max);
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msg.setData(data);
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mHandler.sendMessage(msg);
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}
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@Override
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public void setProgress(String message, int progress, int max) {
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Message msg = new Message();
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Bundle data = new Bundle();
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data.putInt("type", MESSAGE_PROGRESS_UPDATE);
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data.putString("message", message);
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data.putInt("progress", progress);
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data.putInt("max", max);
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msg.setData(data);
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mHandler.sendMessage(msg);
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}
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private void decryptClicked() {
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String error = null;
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ByteArrayInputStream in =
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new ByteArrayInputStream(mMessage.getText().toString().getBytes());
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try {
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mDecryptionKeyId = Apg.getDecryptionKeyId(in);
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showDialog(AskForSecretKeyPassPhrase.DIALOG_PASS_PHRASE);
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} catch (IOException e) {
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error = e.getLocalizedMessage();
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} catch (Apg.GeneralException e) {
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error = e.getLocalizedMessage();
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}
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if (error != null) {
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Toast.makeText(this, "Error: " + error, Toast.LENGTH_SHORT).show();
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}
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}
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private void replyClicked() {
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Intent intent = new Intent(this, EncryptMessageActivity.class);
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intent.setAction(Apg.Intent.ENCRYPT);
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String data = mMessage.getText().toString();
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data = data.replaceAll("(?m)^", "> ");
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data = "\n\n" + data;
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intent.putExtra("data", data);
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intent.putExtra("subject", "Re: " + mSubject);
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intent.putExtra("sendTo", mReplyTo);
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intent.putExtra("eyId", mSignatureKeyId);
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intent.putExtra("signatureKeyId", mDecryptionKeyId);
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intent.putExtra("encryptionKeyIds", new long[] { mSignatureKeyId });
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startActivity(intent);
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}
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public void passPhraseCallback(String passPhrase) {
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Apg.setPassPhrase(passPhrase);
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decryptStart();
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}
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private void decryptStart() {
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showDialog(DIALOG_DECRYPTING);
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mRunningThread = new Thread(this);
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mRunningThread.start();
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}
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public void run() {
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String error = null;
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Security.addProvider(new BouncyCastleProvider());
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Bundle data = new Bundle();
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Message msg = new Message();
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ByteArrayInputStream in =
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new ByteArrayInputStream(mMessage.getText().toString().getBytes());
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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try {
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data = Apg.decrypt(in, out, Apg.getPassPhrase(), this);
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} catch (PGPException e) {
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error = e.getMessage();
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} catch (IOException e) {
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error = e.getMessage();
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} catch (SignatureException e) {
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error = e.getMessage();
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e.printStackTrace();
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} catch (Apg.GeneralException e) {
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error = e.getMessage();
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}
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data.putInt("type", MESSAGE_DONE);
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if (error != null) {
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data.putString("error", error);
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} else {
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data.putString("decryptedMessage", Strings.fromUTF8ByteArray(out.toByteArray()));
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}
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msg.setData(data);
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mHandler.sendMessage(msg);
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}
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}
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