500 lines
19 KiB
Java
500 lines
19 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.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.NoSuchAlgorithmException;
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import java.security.NoSuchProviderException;
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import java.security.SignatureException;
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import org.bouncycastle2.openpgp.PGPEncryptedData;
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import org.bouncycastle2.openpgp.PGPException;
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import org.bouncycastle2.openpgp.PGPSecretKey;
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import org.bouncycastle2.openpgp.PGPSecretKeyRing;
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import org.openintents.intents.FileManager;
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import org.thialfihar.android.apg.Apg.GeneralException;
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import org.thialfihar.android.apg.utils.Choice;
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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.Environment;
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import android.os.Message;
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import android.view.View;
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import android.view.ViewGroup;
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import android.view.View.OnClickListener;
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import android.widget.ArrayAdapter;
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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.RadioGroup;
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import android.widget.Spinner;
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import android.widget.TextView;
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import android.widget.Toast;
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import android.widget.RadioGroup.OnCheckedChangeListener;
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public class EncryptFileActivity extends BaseActivity {
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private EditText mFilename = null;
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private ImageButton mBrowse = null;
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private CheckBox mSign = null;
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private TextView mMainUserId = null;
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private TextView mMainUserIdRest = null;
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private Spinner mAlgorithm = null;
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private EditText mPassPhrase = null;
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private EditText mPassPhraseAgain = null;
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private CheckBox mAsciiArmour = null;
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private RadioGroup mEncryptionMode = null;
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private ViewGroup mAsymmetricLayout = null;
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private ViewGroup mSymmetricLayout = null;
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private Button mEncryptButton = null;
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private Button mSelectKeysButton = null;
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private long mEncryptionKeyIds[] = 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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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.encrypt_file);
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mAsciiArmour = (CheckBox) findViewById(R.id.ascii_armour);
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mAsciiArmour.setChecked(getDefaultAsciiArmour());
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// asymmetric tab
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mSelectKeysButton = (Button) findViewById(R.id.btn_selectEncryptKeys);
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mSelectKeysButton.setOnClickListener(new OnClickListener() {
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@Override
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public void onClick(View v) {
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selectPublicKeys();
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}
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});
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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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mEncryptButton = (Button) findViewById(R.id.btn_encrypt);
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mSign = (CheckBox) findViewById(R.id.sign);
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mMainUserId = (TextView) findViewById(R.id.main_user_id);
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mMainUserIdRest = (TextView) findViewById(R.id.main_user_id_rest);
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mSign.setOnClickListener(new OnClickListener() {
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@Override
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public void onClick(View v) {
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CheckBox checkBox = (CheckBox) v;
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if (checkBox.isChecked()) {
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selectSecretKey();
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} else {
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setSecretKeyId(0);
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Apg.setPassPhrase(null);
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updateView();
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}
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}
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});
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// symmetric tab
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mAlgorithm = (Spinner) findViewById(R.id.algorithm);
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Choice choices[] = {
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new Choice(PGPEncryptedData.AES_128, "AES 128"),
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new Choice(PGPEncryptedData.AES_192, "AES 192"),
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new Choice(PGPEncryptedData.AES_256, "AES 256"),
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new Choice(PGPEncryptedData.BLOWFISH, "Blowfish"),
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new Choice(PGPEncryptedData.TWOFISH, "Twofish"),
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new Choice(PGPEncryptedData.CAST5, "CAST5"),
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new Choice(PGPEncryptedData.DES, "DES"),
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new Choice(PGPEncryptedData.TRIPLE_DES, "Triple DES"),
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new Choice(PGPEncryptedData.IDEA, "IDEA"),
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};
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ArrayAdapter<Choice> adapter =
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new ArrayAdapter<Choice>(this, android.R.layout.simple_spinner_item, choices);
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adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
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mAlgorithm.setAdapter(adapter);
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for (int i = 0; i < choices.length; ++i) {
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if (choices[i].getId() == getDefaultEncryptionAlgorithm()) {
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mAlgorithm.setSelection(i);
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break;
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}
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}
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mEncryptionMode = (RadioGroup) findViewById(R.id.encryption_mode);
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mAsymmetricLayout = (ViewGroup) findViewById(R.id.layout_asymmetric);
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mSymmetricLayout = (ViewGroup) findViewById(R.id.layout_symmetric);
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mPassPhrase = (EditText) findViewById(R.id.pass_phrase);
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mPassPhraseAgain = (EditText) findViewById(R.id.pass_phrase_again);
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mEncryptionMode.check(R.id.use_asymmetric);
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mEncryptionMode.setOnCheckedChangeListener(new OnCheckedChangeListener() {
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@Override
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public void onCheckedChanged(RadioGroup group, int checkedId) {
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if (checkedId == R.id.use_symmetric) {
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mAsymmetricLayout.setVisibility(ViewGroup.GONE);
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mSymmetricLayout.setVisibility(ViewGroup.VISIBLE);
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mEncryptionKeyIds = null;
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setSecretKeyId(0);
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} else {
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mAsymmetricLayout.setVisibility(ViewGroup.VISIBLE);
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mSymmetricLayout.setVisibility(ViewGroup.GONE);
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mPassPhrase.setText("");
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mPassPhraseAgain.setText("");
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}
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updateView();
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}
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});
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if (mEncryptionMode.getCheckedRadioButtonId() == R.id.use_symmetric) {
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mAsymmetricLayout.setVisibility(ViewGroup.GONE);
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mSymmetricLayout.setVisibility(ViewGroup.VISIBLE);
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} else {
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mAsymmetricLayout.setVisibility(ViewGroup.VISIBLE);
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mSymmetricLayout.setVisibility(ViewGroup.GONE);
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}
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mEncryptButton.setOnClickListener(new OnClickListener() {
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@Override
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public void onClick(View v) {
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encryptClicked();
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}
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});
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updateView();
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}
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private void updateView() {
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if (mEncryptionKeyIds == null || mEncryptionKeyIds.length == 0) {
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mSelectKeysButton.setText(R.string.no_keys_selected);
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} else if (mEncryptionKeyIds.length == 1) {
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mSelectKeysButton.setText(R.string.one_key_selected);
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} else {
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mSelectKeysButton.setText("" + mEncryptionKeyIds.length + " " +
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getResources().getString(R.string.n_keys_selected));
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}
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if (getSecretKeyId() == 0) {
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mSign.setChecked(false);
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mMainUserId.setText("");
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mMainUserIdRest.setText("");
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} else {
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String uid = getResources().getString(R.string.unknown_user_id);
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String uidExtra = "";
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PGPSecretKeyRing keyRing = Apg.getSecretKeyRing(getSecretKeyId());
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if (keyRing != null) {
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PGPSecretKey key = Apg.getMasterKey(keyRing);
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if (key != null) {
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String userId = Apg.getMainUserIdSafe(this, key);
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String chunks[] = userId.split(" <", 2);
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uid = chunks[0];
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if (chunks.length > 1) {
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uidExtra = "<" + chunks[1];
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}
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}
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}
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mMainUserId.setText(uid);
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mMainUserIdRest.setText(uidExtra);
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mSign.setChecked(true);
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}
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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, "Select file to encrypt...");
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intent.putExtra(FileManager.EXTRA_BUTTON_TEXT, "Open");
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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.no_filemanager_installed, Toast.LENGTH_SHORT).show();
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}
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}
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private void selectSecretKey() {
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Intent intent = new Intent(this, SelectSecretKeyListActivity.class);
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startActivityForResult(intent, Id.request.secret_keys);
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}
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private void selectPublicKeys() {
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Intent intent = new Intent(this, SelectPublicKeyListActivity.class);
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intent.putExtra("selection", mEncryptionKeyIds);
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startActivityForResult(intent, Id.request.public_keys);
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}
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private void encryptClicked() {
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String currentFilename = mFilename.getText().toString();
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if (mInputFilename == null || !mInputFilename.equals(currentFilename)) {
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mInputFilename = mFilename.getText().toString();
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File file = new File(mInputFilename);
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String ending = (mAsciiArmour.isChecked() ? ".asc" : ".gpg");
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mOutputFilename = Constants.path.app_dir + "/" + file.getName() + ending;
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}
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if (mInputFilename.equals("")) {
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Toast.makeText(this, "Select a file first.", Toast.LENGTH_SHORT).show();
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return;
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}
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// symmetric encryption
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if (mEncryptionMode.getCheckedRadioButtonId() == R.id.use_symmetric) {
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boolean gotPassPhrase = false;
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String passPhrase = mPassPhrase.getText().toString();
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String passPhraseAgain = mPassPhraseAgain.getText().toString();
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if (!passPhrase.equals(passPhraseAgain)) {
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Toast.makeText(this, "Pass phrases don't match.",
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Toast.LENGTH_SHORT).show();
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return;
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}
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gotPassPhrase = (passPhrase.length() != 0);
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if (!gotPassPhrase) {
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Toast.makeText(this, "Enter a pass phrase.",
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Toast.LENGTH_SHORT).show();
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return;
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}
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} else {
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boolean encryptIt = mEncryptionKeyIds != null && mEncryptionKeyIds.length > 0;
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// for now require at least one form of encryption
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if (!encryptIt) {
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Toast.makeText(this, "Select at least one encryption key.",
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Toast.LENGTH_SHORT).show();
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return;
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}
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if (getSecretKeyId() != 0 && Apg.getPassPhrase() == null) {
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showDialog(Id.dialog.pass_phrase);
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return;
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}
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}
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askForOutputFilename();
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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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askForOutputFilename();
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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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private void encryptStart() {
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showDialog(Id.dialog.encrypting);
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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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Bundle data = new Bundle();
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Message msg = new Message();
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try {
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if (mInputFilename.startsWith(Environment.getExternalStorageDirectory().getAbsolutePath()) ||
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mOutputFilename.startsWith(Environment.getExternalStorageDirectory().getAbsolutePath())) {
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if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
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throw new GeneralException("external storage not ready");
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}
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}
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InputStream in = new FileInputStream(mInputFilename);
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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String passPhrase = null;
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if (mEncryptionMode.getCheckedRadioButtonId() == R.id.use_symmetric) {
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passPhrase = mPassPhrase.getText().toString();
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if (passPhrase.length() == 0) {
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passPhrase = null;
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}
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}
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Apg.encrypt(in, out, mAsciiArmour.isChecked(),
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mEncryptionKeyIds, getSecretKeyId(),
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Apg.getPassPhrase(), this,
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((Choice) mAlgorithm.getSelectedItem()).getId(),
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getDefaultHashAlgorithm(),
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passPhrase);
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out.close();
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OutputStream fileOut = new FileOutputStream(mOutputFilename);
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fileOut.write(out.toByteArray());
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fileOut.close();
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} catch (FileNotFoundException e) {
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error = "file not found: " + e.getMessage();
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}
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catch (IOException e) {
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error = e.getMessage();
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} catch (PGPException e) {
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error = e.getMessage();
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} catch (NoSuchProviderException e) {
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error = e.getMessage();
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} catch (NoSuchAlgorithmException 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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} 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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// delete the file if an error occurred
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File file = new File(mOutputFilename);
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file.delete();
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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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protected Dialog onCreateDialog(int id) {
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switch (id) {
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case Id.dialog.output_filename: {
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return FileDialog.build(this, "Encrypt to file",
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"Please specify which file to encrypt to.\n" +
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"WARNING! File will be overwritten if it exists.",
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mOutputFilename,
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new FileDialog.OnClickListener() {
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@Override
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public void onOkClick(String filename) {
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removeDialog(Id.dialog.output_filename);
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mOutputFilename = filename;
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encryptStart();
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}
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@Override
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public void onCancelClick() {
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removeDialog(Id.dialog.output_filename);
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}
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},
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getString(R.string.filemanager_title_save),
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getString(R.string.filemanager_btn_save),
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Id.request.output_filename);
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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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return super.onCreateDialog(id);
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}
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@Override
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protected void onActivityResult(int requestCode, int resultCode, Intent data) {
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switch (requestCode) {
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case Id.request.filename: {
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if (resultCode == RESULT_OK && data != null) {
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String filename = data.getDataString();
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if (filename != null) {
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// Get rid of URI prefix:
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if (filename.startsWith("file://")) {
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filename = filename.substring(7);
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}
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// replace %20 and so on
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filename = Uri.decode(filename);
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mFilename.setText(filename);
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}
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}
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return;
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}
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case Id.request.output_filename: {
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if (resultCode == RESULT_OK && data != null) {
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String filename = data.getDataString();
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if (filename != null) {
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// Get rid of URI prefix:
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if (filename.startsWith("file://")) {
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filename = filename.substring(7);
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}
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// replace %20 and so on
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filename = Uri.decode(filename);
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FileDialog.setFilename(filename);
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}
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}
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return;
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}
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case Id.request.secret_keys: {
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if (resultCode == RESULT_OK) {
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super.onActivityResult(requestCode, resultCode, data);
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updateView();
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}
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break;
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}
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case Id.request.public_keys: {
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if (resultCode == RESULT_OK) {
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Bundle bundle = data.getExtras();
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mEncryptionKeyIds = bundle.getLongArray("selection");
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updateView();
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}
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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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super.onActivityResult(requestCode, resultCode, data);
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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.encrypting);
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String error = data.getString("error");
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if (error != null) {
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Toast.makeText(EncryptFileActivity.this,
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"Error: " + data.getString("error"),
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Toast.LENGTH_SHORT).show();
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} else {
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Toast.makeText(EncryptFileActivity.this,
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"Successfully encrypted.",
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Toast.LENGTH_SHORT).show();
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}
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}
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}
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