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/*
* Copyright (C) 2012-2014 Dominik Schürmann <dominik@dominikschuermann.de>
* Copyright (C) 2010-2014 Thialfihar <thi@thialfihar.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.sufficientlysecure.keychain.ui;
import android.app.ProgressDialog;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.os.Messenger;
import android.support.v4.app.Fragment;
import android.view.Menu;
import android.view.MenuItem;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.api.OpenKeychainIntents;
import org.sufficientlysecure.keychain.compatibility.ClipboardReflection;
import org.sufficientlysecure.keychain.helper.Preferences;
import org.sufficientlysecure.keychain.helper.ShareHelper;
import org.sufficientlysecure.keychain.pgp.KeyRing;
import org.sufficientlysecure.keychain.service.KeychainIntentService;
import org.sufficientlysecure.keychain.service.KeychainIntentServiceHandler;
import org.sufficientlysecure.keychain.service.PassphraseCacheService;
import org.sufficientlysecure.keychain.ui.dialog.DeleteFileDialogFragment;
import org.sufficientlysecure.keychain.ui.dialog.PassphraseDialogFragment;
import org.sufficientlysecure.keychain.util.Log;
import org.sufficientlysecure.keychain.util.Notify;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Set;
public class EncryptFileActivity extends DrawerActivity implements EncryptActivityInterface {
/* Intents */
public static final String ACTION_ENCRYPT_FILES = OpenKeychainIntents.ENCRYPT_DATA;
// enables ASCII Armor for file encryption when uri is given
public static final String EXTRA_ASCII_ARMOR = OpenKeychainIntents.ENCRYPT_EXTRA_ASCII_ARMOR;
// preselect ids, for internal use
public static final String EXTRA_SIGNATURE_KEY_ID = Constants.EXTRA_PREFIX + "EXTRA_SIGNATURE_KEY_ID";
public static final String EXTRA_ENCRYPTION_KEY_IDS = Constants.EXTRA_PREFIX + "EXTRA_ENCRYPTION_IDS";
// view
private int mCurrentMode = MODE_ASYMMETRIC;
// tabs
private static final int MODE_ASYMMETRIC = 0;
private static final int MODE_SYMMETRIC = 1;
// model used by fragments
private long mEncryptionKeyIds[] = null;
private String mEncryptionUserIds[] = null;
private long mSigningKeyId = Constants.key.none;
private String mPassphrase = "";
private boolean mUseArmor;
private boolean mDeleteAfterEncrypt = false;
private boolean mShareAfterEncrypt = false;
private ArrayList<Uri> mInputUris;
private ArrayList<Uri> mOutputUris;
private String mMessage = "";
public boolean isModeSymmetric() {
return MODE_SYMMETRIC == mCurrentMode;
}
@Override
public boolean isUseArmor() {
return mUseArmor;
}
@Override
public long getSignatureKey() {
return mSigningKeyId;
}
@Override
public long[] getEncryptionKeys() {
return mEncryptionKeyIds;
}
@Override
public String[] getEncryptionUsers() {
return mEncryptionUserIds;
}
@Override
public void setSignatureKey(long signatureKey) {
mSigningKeyId = signatureKey;
notifyUpdate();
}
@Override
public void setEncryptionKeys(long[] encryptionKeys) {
mEncryptionKeyIds = encryptionKeys;
notifyUpdate();
}
@Override
public void setEncryptionUsers(String[] encryptionUsers) {
mEncryptionUserIds = encryptionUsers;
notifyUpdate();
}
@Override
public void setPassphrase(String passphrase) {
mPassphrase = passphrase;
}
@Override
public ArrayList<Uri> getInputUris() {
if (mInputUris == null) mInputUris = new ArrayList<Uri>();
return mInputUris;
}
@Override
public ArrayList<Uri> getOutputUris() {
if (mOutputUris == null) mOutputUris = new ArrayList<Uri>();
return mOutputUris;
}
@Override
public void setInputUris(ArrayList<Uri> uris) {
mInputUris = uris;
notifyUpdate();
}
@Override
public void setOutputUris(ArrayList<Uri> uris) {
mOutputUris = uris;
notifyUpdate();
}
@Override
public String getMessage() {
return mMessage;
}
@Override
public void setMessage(String message) {
mMessage = message;
}
@Override
public void notifyUpdate() {
for (Fragment fragment : getSupportFragmentManager().getFragments()) {
if (fragment instanceof EncryptActivityInterface.UpdateListener) {
((UpdateListener) fragment).onNotifyUpdate();
}
}
}
@Override
public void startEncrypt(boolean share) {
mShareAfterEncrypt = share;
startEncrypt();
}
public void startEncrypt() {
if (!inputIsValid()) {
// Notify was created by inputIsValid.
return;
}
// Send all information needed to service to edit key in other thread
Intent intent = new Intent(this, KeychainIntentService.class);
intent.setAction(KeychainIntentService.ACTION_ENCRYPT_SIGN);
intent.putExtra(KeychainIntentService.EXTRA_DATA, createEncryptBundle());
// Message is received after encrypting is done in KeychainIntentService
KeychainIntentServiceHandler serviceHandler = new KeychainIntentServiceHandler(this,
getString(R.string.progress_encrypting), ProgressDialog.STYLE_HORIZONTAL) {
public void handleMessage(Message message) {
// handle messages by standard KeychainIntentServiceHandler first
super.handleMessage(message);
if (message.arg1 == KeychainIntentServiceHandler.MESSAGE_OKAY) {
Notify.showNotify(EncryptFileActivity.this, R.string.encrypt_sign_successful, Notify.Style.INFO);
if (mDeleteAfterEncrypt) {
for (Uri inputUri : mInputUris) {
DeleteFileDialogFragment deleteFileDialog = DeleteFileDialogFragment.newInstance(inputUri);
deleteFileDialog.show(getSupportFragmentManager(), "deleteDialog");
}
mInputUris.clear();
notifyUpdate();
}
if (mShareAfterEncrypt) {
// Share encrypted message/file
startActivity(sendWithChooserExcludingEncrypt(message));
} else {
// Copy to clipboard
copyToClipboard(message);
Notify.showNotify(EncryptFileActivity.this,
R.string.encrypt_sign_clipboard_successful, Notify.Style.INFO);
}
}
}
};
// Create a new Messenger for the communication back
Messenger messenger = new Messenger(serviceHandler);
intent.putExtra(KeychainIntentService.EXTRA_MESSENGER, messenger);
// show progress dialog
serviceHandler.showProgressDialog(this);
// start service with intent
startService(intent);
}
private Bundle createEncryptBundle() {
// fill values for this action
Bundle data = new Bundle();
data.putInt(KeychainIntentService.SOURCE, KeychainIntentService.IO_URIS);
data.putParcelableArrayList(KeychainIntentService.ENCRYPT_INPUT_URIS, mInputUris);
data.putInt(KeychainIntentService.TARGET, KeychainIntentService.IO_URIS);
data.putParcelableArrayList(KeychainIntentService.ENCRYPT_OUTPUT_URIS, mOutputUris);
data.putInt(KeychainIntentService.ENCRYPT_COMPRESSION_ID,
Preferences.getPreferences(this).getDefaultFileCompression());
// Always use armor for messages
data.putBoolean(KeychainIntentService.ENCRYPT_USE_ASCII_ARMOR, mUseArmor);
if (isModeSymmetric()) {
Log.d(Constants.TAG, "Symmetric encryption enabled!");
String passphrase = mPassphrase;
if (passphrase.length() == 0) {
passphrase = null;
}
data.putString(KeychainIntentService.ENCRYPT_SYMMETRIC_PASSPHRASE, passphrase);
} else {
data.putLong(KeychainIntentService.ENCRYPT_SIGNATURE_KEY_ID, mSigningKeyId);
data.putLongArray(KeychainIntentService.ENCRYPT_ENCRYPTION_KEYS_IDS, mEncryptionKeyIds);
}
return data;
}
private void copyToClipboard(Message message) {
ClipboardReflection.copyToClipboard(this, new String(message.getData().getByteArray(KeychainIntentService.RESULT_BYTES)));
}
/**
* Create Intent Chooser but exclude OK's EncryptActivity.
*/
private Intent sendWithChooserExcludingEncrypt(Message message) {
Intent prototype = createSendIntent(message);
String title = getString(R.string.title_share_file);
// we don't want to encrypt the encrypted, no inception ;)
String[] blacklist = new String[]{
Constants.PACKAGE_NAME + ".ui.EncryptFileActivity",
"org.thialfihar.android.apg.ui.EncryptActivity"
};
return new ShareHelper(this).createChooserExcluding(prototype, title, blacklist);
}
private Intent createSendIntent(Message message) {
Intent sendIntent;
// file
if (mOutputUris.size() == 1) {
sendIntent = new Intent(Intent.ACTION_SEND);
sendIntent.putExtra(Intent.EXTRA_STREAM, mOutputUris.get(0));
} else {
sendIntent = new Intent(Intent.ACTION_SEND_MULTIPLE);
sendIntent.putExtra(Intent.EXTRA_STREAM, mOutputUris);
}
sendIntent.setType("application/octet-stream");
if (!isModeSymmetric() && mEncryptionUserIds != null) {
Set<String> users = new HashSet<String>();
for (String user : mEncryptionUserIds) {
String[] userId = KeyRing.splitUserId(user);
if (userId[1] != null) {
users.add(userId[1]);
}
}
sendIntent.putExtra(Intent.EXTRA_EMAIL, users.toArray(new String[users.size()]));
}
return sendIntent;
}
private boolean inputIsValid() {
// file checks
if (mInputUris.isEmpty()) {
Notify.showNotify(this, R.string.no_file_selected, Notify.Style.ERROR);
return false;
} else if (mInputUris.size() > 1 && !mShareAfterEncrypt) {
// This should be impossible...
return false;
} else if (mInputUris.size() != mOutputUris.size()) {
// This as well
return false;
}
if (isModeSymmetric()) {
// symmetric encryption checks
if (mPassphrase == null) {
Notify.showNotify(this, R.string.passphrases_do_not_match, Notify.Style.ERROR);
return false;
}
if (mPassphrase.isEmpty()) {
Notify.showNotify(this, R.string.passphrase_must_not_be_empty, Notify.Style.ERROR);
return false;
}
} else {
// asymmetric encryption checks
boolean gotEncryptionKeys = (mEncryptionKeyIds != null
&& mEncryptionKeyIds.length > 0);
// Files must be encrypted, only text can be signed-only right now
if (!gotEncryptionKeys) {
Notify.showNotify(this, R.string.select_encryption_key, Notify.Style.ERROR);
return false;
}
try {
if (mSigningKeyId != 0 && PassphraseCacheService.getCachedPassphrase(this, mSigningKeyId) == null) {
PassphraseDialogFragment.show(this, mSigningKeyId,
new Handler() {
@Override
public void handleMessage(Message message) {
if (message.what == PassphraseDialogFragment.MESSAGE_OKAY) {
// restart
startEncrypt();
}
}
}
);
return false;
}
} catch (PassphraseCacheService.KeyNotFoundException e) {
Log.e(Constants.TAG, "Key not found!", e);
}
}
return true;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.encrypt_file_activity);
// if called with an intent action, do not init drawer navigation
if (ACTION_ENCRYPT_FILES.equals(getIntent().getAction())) {
// lock drawer
deactivateDrawerNavigation();
// TODO: back button to key?
} else {
activateDrawerNavigation(savedInstanceState);
}
// Handle intent actions
handleActions(getIntent());
updateModeFragment();
mUseArmor = Preferences.getPreferences(this).getDefaultAsciiArmor();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.encrypt_file_activity, menu);
menu.findItem(R.id.check_use_armor).setChecked(mUseArmor);
return super.onCreateOptionsMenu(menu);
}
private void updateModeFragment() {
getSupportFragmentManager().beginTransaction()
.replace(R.id.encrypt_pager_mode,
mCurrentMode == MODE_SYMMETRIC
? new EncryptSymmetricFragment()
: new EncryptAsymmetricFragment()
)
.commitAllowingStateLoss();
getSupportFragmentManager().executePendingTransactions();
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.isCheckable()) {
item.setChecked(!item.isChecked());
}
switch (item.getItemId()) {
case R.id.check_use_symmetric:
mCurrentMode = item.isChecked() ? MODE_SYMMETRIC : MODE_ASYMMETRIC;
updateModeFragment();
notifyUpdate();
break;
case R.id.check_use_armor:
mUseArmor = item.isChecked();
notifyUpdate();
break;
case R.id.check_delete_after_encrypt:
mDeleteAfterEncrypt = item.isChecked();
notifyUpdate();
break;
default:
return super.onOptionsItemSelected(item);
}
return true;
}
/**
* Handles all actions with this intent
*
* @param intent
*/
private void handleActions(Intent intent) {
String action = intent.getAction();
Bundle extras = intent.getExtras();
String type = intent.getType();
ArrayList<Uri> uris = new ArrayList<Uri>();
if (extras == null) {
extras = new Bundle();
}
if (intent.getData() != null) {
uris.add(intent.getData());
}
/*
* Android's Action
*/
if (Intent.ACTION_SEND.equals(action) && type != null) {
// When sending to OpenKeychain Encrypt via share menu
/* if ("text/plain".equals(type)) {
// TODO handle, maybe forward to "encrypt text" activity?
Plain text
String sharedText = intent.getStringExtra(Intent.EXTRA_TEXT);
if (sharedText != null) {
// handle like normal text encryption, override action and extras to later
// executeServiceMethod ACTION_ENCRYPT_TEXT in main actions
extras.putString(EXTRA_TEXT, sharedText);
extras.putBoolean(EXTRA_ASCII_ARMOR, true);
action = ACTION_ENCRYPT_TEXT;
}
} else */
{
// Files via content provider, override uri and action
uris.clear();
uris.add(intent.<Uri>getParcelableExtra(Intent.EXTRA_STREAM));
}
}
if (Intent.ACTION_SEND_MULTIPLE.equals(action) && type != null) {
uris = intent.getParcelableArrayListExtra(Intent.EXTRA_STREAM);
}
if (extras.containsKey(EXTRA_ASCII_ARMOR)) {
mUseArmor = extras.getBoolean(EXTRA_ASCII_ARMOR, true);
}
// preselect keys given by intent
mSigningKeyId = extras.getLong(EXTRA_SIGNATURE_KEY_ID);
mEncryptionKeyIds = extras.getLongArray(EXTRA_ENCRYPTION_KEY_IDS);
// Save uris
mInputUris = uris;
}
}
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