620 lines
23 KiB
Java
620 lines
23 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.File;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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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 org.openintents.intents.FileManager;
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import android.app.Dialog;
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import android.content.ActivityNotFoundException;
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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.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.view.animation.AnimationUtils;
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import android.widget.Button;
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import android.widget.CheckBox;
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import android.widget.EditText;
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import android.widget.ImageButton;
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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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import android.widget.ViewFlipper;
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public class DecryptActivity extends BaseActivity {
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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 boolean mSignedOnly = false;
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private boolean mAssumeSymmetricEncryption = false;
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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 ViewFlipper mSource = null;
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private TextView mSourceLabel = null;
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private ImageView mSourcePrevious = null;
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private ImageView mSourceNext = null;
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private Button mDecryptButton = null;
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private Button mReplyButton = null;
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private int mDecryptTarget;
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private EditText mFilename = null;
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private CheckBox mDeleteAfter = null;
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private ImageButton mBrowse = null;
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private String mInputFilename = null;
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private String mOutputFilename = null;
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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);
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mSource = (ViewFlipper) findViewById(R.id.source);
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mSourceLabel = (TextView) findViewById(R.id.sourceLabel);
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mSourcePrevious = (ImageView) findViewById(R.id.sourcePrevious);
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mSourceNext = (ImageView) findViewById(R.id.sourceNext);
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mSourcePrevious.setClickable(true);
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mSourcePrevious.setOnClickListener(new OnClickListener() {
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@Override
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public void onClick(View v) {
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mSource.setInAnimation(AnimationUtils.loadAnimation(DecryptActivity.this,
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R.anim.push_right_in));
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mSource.setOutAnimation(AnimationUtils.loadAnimation(DecryptActivity.this,
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R.anim.push_right_out));
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mSource.showPrevious();
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updateSource();
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}
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});
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mSourceNext.setClickable(true);
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OnClickListener nextSourceClickListener = new OnClickListener() {
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@Override
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public void onClick(View v) {
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mSource.setInAnimation(AnimationUtils.loadAnimation(DecryptActivity.this,
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R.anim.push_left_in));
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mSource.setOutAnimation(AnimationUtils.loadAnimation(DecryptActivity.this,
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R.anim.push_left_out));
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mSource.showNext();
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updateSource();
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}
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};
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mSourceNext.setOnClickListener(nextSourceClickListener);
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mSourceLabel.setClickable(true);
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mSourceLabel.setOnClickListener(nextSourceClickListener);
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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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mReplyButton = (Button) findViewById(R.id.btn_reply);
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mSignatureLayout = (LinearLayout) findViewById(R.id.signature);
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mSignatureStatusImage = (ImageView) findViewById(R.id.ic_signature_status);
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mUserId = (TextView) findViewById(R.id.mainUserId);
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mUserIdRest = (TextView) findViewById(R.id.mainUserIdRest);
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// measure the height of the source_file view and set the message view's min height to that,
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// so it fills mSource fully... bit of a hack.
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View tmp = findViewById(R.id.sourceFile);
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tmp.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);
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int height = tmp.getMeasuredHeight();
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mMessage.setMinimumHeight(height);
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mFilename = (EditText) findViewById(R.id.filename);
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mBrowse = (ImageButton) findViewById(R.id.btn_browse);
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mBrowse.setOnClickListener(new View.OnClickListener() {
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@Override
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public void onClick(View v) {
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openFile();
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}
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});
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mDeleteAfter = (CheckBox) findViewById(R.id.deleteAfterDecryption);
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// default: message source
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mSource.setInAnimation(null);
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mSource.setOutAnimation(null);
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while (mSource.getCurrentView().getId() != R.id.sourceMessage) {
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mSource.showNext();
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}
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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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Bundle extras = intent.getExtras();
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if (extras == null) {
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extras = new Bundle();
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}
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String data = extras.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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// replace non breakable spaces
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data = data.replaceAll("\\xa0", " ");
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mMessage.setText(data);
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} else {
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matcher = Apg.PGP_SIGNED_MESSAGE.matcher(data);
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if (matcher.matches()) {
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data = matcher.group(1);
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// replace non breakable spaces
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data = data.replaceAll("\\xa0", " ");
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mMessage.setText(data);
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mDecryptButton.setText(R.string.btn_verify);
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}
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}
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}
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mReplyTo = extras.getString("replyTo");
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mSubject = extras.getString("subject");
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} else if (intent.getAction() != null && intent.getAction().equals(Apg.Intent.DECRYPT_FILE)) {
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mSource.setInAnimation(null);
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mSource.setOutAnimation(null);
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while (mSource.getCurrentView().getId() != R.id.sourceFile) {
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mSource.showNext();
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}
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}
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if (mSource.getCurrentView().getId() == R.id.sourceMessage &&
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mMessage.getText().length() == 0) {
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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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matcher = Apg.PGP_SIGNED_MESSAGE.matcher(clip.getText());
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}
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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.usingClipboardContent, Toast.LENGTH_SHORT).show();
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}
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}
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mSignatureLayout.setVisibility(View.GONE);
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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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mReplyButton.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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mReplyButton.setVisibility(View.INVISIBLE);
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if (mSource.getCurrentView().getId() == R.id.sourceMessage &&
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mMessage.getText().length() > 0) {
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mDecryptButton.performClick();
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}
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updateSource();
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}
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private void openFile() {
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String filename = mFilename.getText().toString();
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Intent intent = new Intent(FileManager.ACTION_PICK_FILE);
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intent.setData(Uri.parse("file://" + filename));
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intent.putExtra(FileManager.EXTRA_TITLE, getString(R.string.filemanager_titleDecrypt));
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intent.putExtra(FileManager.EXTRA_BUTTON_TEXT, R.string.filemanager_btnOpen);
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try {
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startActivityForResult(intent, Id.request.filename);
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} catch (ActivityNotFoundException e) {
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// No compatible file manager was found.
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Toast.makeText(this, R.string.oiFilemanagerNotInstalled, Toast.LENGTH_SHORT).show();
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}
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}
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private void guessOutputFilename() {
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mInputFilename = mFilename.getText().toString();
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File file = new File(mInputFilename);
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String filename = file.getName();
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if (filename.endsWith(".asc") || filename.endsWith(".gpg")) {
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filename = filename.substring(0, filename.length() - 4);
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}
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mOutputFilename = Constants.path.app_dir + "/" + filename;
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}
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private void updateSource() {
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switch (mSource.getCurrentView().getId()) {
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case R.id.sourceFile: {
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mSourceLabel.setText(R.string.label_file);
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mDecryptButton.setText(R.string.btn_decrypt);
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break;
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}
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case R.id.sourceMessage: {
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mSourceLabel.setText(R.string.label_message);
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mDecryptButton.setText(R.string.btn_decrypt);
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break;
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}
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default: {
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break;
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}
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}
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}
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private void decryptClicked() {
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if (mSource.getCurrentView().getId() == R.id.sourceFile) {
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mDecryptTarget = Id.target.file;
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} else {
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mDecryptTarget = Id.target.message;
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}
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initiateDecryption();
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}
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private void initiateDecryption() {
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if (mDecryptTarget == Id.target.file) {
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String currentFilename = mFilename.getText().toString();
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if (mInputFilename == null || !mInputFilename.equals(currentFilename)) {
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guessOutputFilename();
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}
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if (mInputFilename.equals("")) {
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Toast.makeText(this, R.string.noFileSelected, Toast.LENGTH_SHORT).show();
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return;
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}
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File file = new File(mInputFilename);
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if (!file.exists() || !file.isFile()) {
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Toast.makeText(this, getString(R.string.errorMessage,
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getString(R.string.error_fileNotFound)),
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Toast.LENGTH_SHORT).show();
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return;
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}
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}
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if (mDecryptTarget == Id.target.message) {
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String messageData = mMessage.getText().toString();
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Matcher matcher = Apg.PGP_SIGNED_MESSAGE.matcher(messageData);
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if (matcher.matches()) {
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mSignedOnly = true;
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decryptStart();
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return;
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}
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}
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// else treat it as an decrypted message/file
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mSignedOnly = false;
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String error = null;
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try {
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InputStream in;
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if (mDecryptTarget == Id.target.file) {
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in = new FileInputStream(mInputFilename);
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} else {
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in = new ByteArrayInputStream(mMessage.getText().toString().getBytes());
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}
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try {
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setSecretKeyId(Apg.getDecryptionKeyId(in));
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if (getSecretKeyId() == 0) {
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throw new Apg.GeneralException(getString(R.string.error_noSecretKeyFound));
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}
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mAssumeSymmetricEncryption = false;
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} catch (Apg.NoAsymmetricEncryptionException e) {
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setSecretKeyId(0);
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// reopen the file/message to check whether there's
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// symmetric encryption data in there
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if (mDecryptTarget == Id.target.file) {
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in = new FileInputStream(mInputFilename);
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} else {
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in = new ByteArrayInputStream(mMessage.getText().toString().getBytes());
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}
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if (!Apg.hasSymmetricEncryption(in)) {
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throw new Apg.GeneralException(getString(R.string.error_noKnownEncryptionFound));
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}
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mAssumeSymmetricEncryption = true;
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}
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showDialog(Id.dialog.pass_phrase);
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} catch (FileNotFoundException e) {
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error = getString(R.string.error_fileNotFound);
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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, getString(R.string.errorMessage, error),
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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, EncryptActivity.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", getSecretKeyId());
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intent.putExtra("encryptionKeyIds", new long[] { mSignatureKeyId });
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startActivity(intent);
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}
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private void askForOutputFilename() {
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showDialog(Id.dialog.output_filename);
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}
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@Override
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public void passPhraseCallback(String passPhrase) {
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super.passPhraseCallback(passPhrase);
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if (mDecryptTarget == Id.target.file) {
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askForOutputFilename();
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} else {
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decryptStart();
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}
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}
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private void decryptStart() {
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showDialog(Id.dialog.decrypting);
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startThread();
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}
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@Override
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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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try {
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InputStream in = null;
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OutputStream out = null;
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if (mDecryptTarget == Id.target.message) {
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String messageData = mMessage.getText().toString();
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in = new ByteArrayInputStream(messageData.getBytes());
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out = new ByteArrayOutputStream();
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} else {
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in = new FileInputStream(mInputFilename);
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out = new FileOutputStream(mOutputFilename);
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}
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if (mSignedOnly) {
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data = Apg.verifyText(in, out, this);
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} else {
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data = Apg.decrypt(in, out, Apg.getPassPhrase(), this, mAssumeSymmetricEncryption);
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}
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out.close();
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if (mDecryptTarget == Id.target.message) {
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data.putString("decryptedMessage",
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Strings.fromUTF8ByteArray(((ByteArrayOutputStream)
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out).toByteArray()));
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}
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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", Id.message.done);
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if (error != null) {
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data.putString("error", error);
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}
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msg.setData(data);
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sendMessage(msg);
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}
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@Override
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public void doneCallback(Message msg) {
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super.doneCallback(msg);
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Bundle data = msg.getData();
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removeDialog(Id.dialog.decrypting);
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mSignatureKeyId = 0;
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mSignatureLayout.setVisibility(View.GONE);
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mReplyButton.setVisibility(View.INVISIBLE);
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String error = data.getString("error");
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if (error != null) {
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Toast.makeText(DecryptActivity.this,
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getString(R.string.errorMessage,
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data.getString("error")),
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Toast.LENGTH_SHORT).show();
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return;
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}
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Toast.makeText(this, R.string.decryptionSuccessful, Toast.LENGTH_SHORT).show();
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switch (mDecryptTarget) {
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case Id.target.message: {
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String decryptedMessage = data.getString("decryptedMessage");
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mMessage.setText(decryptedMessage);
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mReplyButton.setVisibility(View.VISIBLE);
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break;
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}
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case Id.target.file: {
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if (mDeleteAfter.isChecked()) {
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setDeleteFile(mInputFilename);
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showDialog(Id.dialog.delete_file);
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}
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break;
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}
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default: {
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// shouldn't happen
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break;
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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: " + Long.toHexString(mSignatureKeyId & 0xffffffffL));
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if (userId == null) {
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userId = getResources().getString(R.string.unknownUserId);
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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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}
|
|
mUserId.setText(userId);
|
|
|
|
if (data.getBoolean("signatureSuccess")) {
|
|
mSignatureStatusImage.setImageResource(R.drawable.overlay_ok);
|
|
} else if (data.getBoolean("signatureUnknown")) {
|
|
mSignatureStatusImage.setImageResource(R.drawable.overlay_error);
|
|
} else {
|
|
mSignatureStatusImage.setImageResource(R.drawable.overlay_error);
|
|
}
|
|
mSignatureLayout.setVisibility(View.VISIBLE);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
|
|
switch (requestCode) {
|
|
case Id.request.filename: {
|
|
if (resultCode == RESULT_OK && data != null) {
|
|
String filename = data.getDataString();
|
|
if (filename != null) {
|
|
// Get rid of URI prefix:
|
|
if (filename.startsWith("file://")) {
|
|
filename = filename.substring(7);
|
|
}
|
|
// replace %20 and so on
|
|
filename = Uri.decode(filename);
|
|
|
|
mFilename.setText(filename);
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
case Id.request.output_filename: {
|
|
if (resultCode == RESULT_OK && data != null) {
|
|
String filename = data.getDataString();
|
|
if (filename != null) {
|
|
// Get rid of URI prefix:
|
|
if (filename.startsWith("file://")) {
|
|
filename = filename.substring(7);
|
|
}
|
|
// replace %20 and so on
|
|
filename = Uri.decode(filename);
|
|
|
|
FileDialog.setFilename(filename);
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
default: {
|
|
break;
|
|
}
|
|
}
|
|
|
|
super.onActivityResult(requestCode, resultCode, data);
|
|
}
|
|
|
|
@Override
|
|
protected Dialog onCreateDialog(int id) {
|
|
switch (id) {
|
|
case Id.dialog.output_filename: {
|
|
return FileDialog.build(this, getString(R.string.title_decryptToFile),
|
|
getString(R.string.specifyFileToDecryptTo),
|
|
mOutputFilename,
|
|
new FileDialog.OnClickListener() {
|
|
|
|
@Override
|
|
public void onOkClick(String filename) {
|
|
removeDialog(Id.dialog.output_filename);
|
|
mOutputFilename = filename;
|
|
decryptStart();
|
|
}
|
|
|
|
@Override
|
|
public void onCancelClick() {
|
|
removeDialog(Id.dialog.output_filename);
|
|
}
|
|
},
|
|
getString(R.string.filemanager_titleSave),
|
|
getString(R.string.filemanager_btnSave),
|
|
Id.request.output_filename);
|
|
}
|
|
|
|
default: {
|
|
break;
|
|
}
|
|
}
|
|
|
|
return super.onCreateDialog(id);
|
|
}
|
|
}
|