@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// do not allow screenshots of passphrase input
// to prevent "too easy" passphrase theft by root apps
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.HONEYCOMB) {
getWindow()
.setFlags(WindowManager.LayoutParams.FLAG_SECURE, WindowManager.LayoutParams.FLAG_SECURE);
}
CryptoInputParcel cryptoInputParcel = getIntent().getParcelableExtra(EXTRA_CRYPTO_INPUT);
if (cryptoInputParcel == null) {
cryptoInputParcel = new CryptoInputParcel();
getIntent().putExtra(EXTRA_CRYPTO_INPUT, cryptoInputParcel);
}
// this activity itself has no content view (see manifest)
RequiredInputParcel requiredInput = getIntent().getParcelableExtra(EXTRA_REQUIRED_INPUT);
if (requiredInput.mType != RequiredInputType.PASSPHRASE) {
return;
}
// handle empty passphrases by directly returning an empty crypto input parcel
try {
CanonicalizedSecretKeyRing pubRing =
new ProviderHelper(this).getCanonicalizedSecretKeyRing(requiredInput.getMasterKeyId());
// use empty passphrase for empty passphrase
if (pubRing.getSecretKey(requiredInput.getSubKeyId()).getSecretKeyType()
== SecretKeyType.PASSPHRASE_EMPTY) {
// also return passphrase back to activity
Intent returnIntent = new Intent();
cryptoInputParcel.mPassphrase = new Passphrase("");
returnIntent.putExtra(RESULT_CRYPTO_INPUT, cryptoInputParcel);
setResult(RESULT_OK, returnIntent);
finish();
}
} catch (NotFoundException e) {
Log.e(Constants.TAG, "Key not found?!", e);
setResult(RESULT_CANCELED);
finish();
}
}
@NonNull
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
final Activity activity = getActivity();
ContextThemeWrapper theme = ThemeChanger.getDialogThemeWrapper(activity);
mRequiredInput = getArguments().getParcelable(EXTRA_REQUIRED_INPUT);
CustomAlertDialogBuilder alert = new CustomAlertDialogBuilder(theme);
// No title, see http://www.google.com/design/spec/components/dialogs.html#dialogs-alerts
// alert.setTitle()
if (mRequiredInput.mType == RequiredInputType.BACKUP_CODE) {
LayoutInflater inflater = LayoutInflater.from(theme);
View view = inflater.inflate(R.layout.passphrase_dialog_backup_code, null);
alert.setView(view);
mBackupCodeEditText = new EditText[4];
mBackupCodeEditText[0] = (EditText) view.findViewById(R.id.backup_code_1);
mBackupCodeEditText[1] = (EditText) view.findViewById(R.id.backup_code_2);
mBackupCodeEditText[2] = (EditText) view.findViewById(R.id.backup_code_3);
mBackupCodeEditText[3] = (EditText) view.findViewById(R.id.backup_code_4);
setupEditTextFocusNext(mBackupCodeEditText);
AlertDialog dialog = alert.create();
dialog.setButton(
DialogInterface.BUTTON_POSITIVE,
activity.getString(R.string.btn_unlock),
(DialogInterface.OnClickListener) null);
return dialog;
}
long subKeyId = mRequiredInput.getSubKeyId();
LayoutInflater inflater = LayoutInflater.from(theme);
mLayout = (ViewAnimator) inflater.inflate(R.layout.passphrase_dialog, null);
alert.setView(mLayout);
mPassphraseText = (TextView) mLayout.findViewById(R.id.passphrase_text);
mPassphraseEditText = (EditText) mLayout.findViewById(R.id.passphrase_passphrase);
View vTimeToLiveLayout = mLayout.findViewById(R.id.remember_layout);
vTimeToLiveLayout.setVisibility(mRequiredInput.mSkipCaching ? View.GONE : View.VISIBLE);
mTimeToLiveSpinner = (CacheTTLSpinner) mLayout.findViewById(R.id.ttl_spinner);
alert.setNegativeButton(
android.R.string.cancel,
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
String userId;
CanonicalizedSecretKey.SecretKeyType keyType =
CanonicalizedSecretKey.SecretKeyType.PASSPHRASE;
String message;
String hint;
if (mRequiredInput.mType == RequiredInputType.PASSPHRASE_SYMMETRIC) {
message = getString(R.string.passphrase_for_symmetric_encryption);
hint = getString(R.string.label_passphrase);
} else {
try {
ProviderHelper helper = new ProviderHelper(activity);
mSecretRing =
helper.getCanonicalizedSecretKeyRing(
KeychainContract.KeyRings.buildUnifiedKeyRingsFindBySubkeyUri(subKeyId));
// yes the inner try/catch block is necessary, otherwise the final variable
// above can't be statically verified to have been set in all cases because
// the catch clause doesn't return.
try {
String mainUserId = mSecretRing.getPrimaryUserIdWithFallback();
KeyRing.UserId mainUserIdSplit = KeyRing.splitUserId(mainUserId);
if (mainUserIdSplit.name != null) {
userId = mainUserIdSplit.name;
} else {
userId = getString(R.string.user_id_no_name);
}
} catch (PgpKeyNotFoundException e) {
userId = null;
}
keyType = mSecretRing.getSecretKey(subKeyId).getSecretKeyType();
switch (keyType) {
case PASSPHRASE:
message = getString(R.string.passphrase_for, userId);
hint = getString(R.string.label_passphrase);
break;
case PIN:
message = getString(R.string.pin_for, userId);
hint = getString(R.string.label_pin);
break;
case DIVERT_TO_CARD:
message = getString(R.string.yubikey_pin_for, userId);
hint = getString(R.string.label_pin);
break;
// special case: empty passphrase just returns the empty passphrase
case PASSPHRASE_EMPTY:
finishCaching(new Passphrase(""));
default:
throw new AssertionError("Unhandled SecretKeyType (should not happen)");
}
} catch (ProviderHelper.NotFoundException e) {
alert.setTitle(R.string.title_key_not_found);
alert.setMessage(getString(R.string.key_not_found, mRequiredInput.getSubKeyId()));
alert.setPositiveButton(
android.R.string.ok,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dismiss();
}
});
alert.setCancelable(false);
return alert.create();
}
}
mPassphraseText.setText(message);
mPassphraseEditText.setHint(hint);
// Hack to open keyboard.
// This is the only method that I found to work across all Android versions
// http://turbomanage.wordpress.com/2012/05/02/show-soft-keyboard-automatically-when-edittext-receives-focus/
// Notes: * onCreateView can't be used because we want to add buttons to the dialog
// * opening in onActivityCreated does not work on Android 4.4
mPassphraseEditText.setOnFocusChangeListener(
new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View v, boolean hasFocus) {
mPassphraseEditText.post(
new Runnable() {
@Override
public void run() {
if (getActivity() == null || mPassphraseEditText == null) {
return;
}
InputMethodManager imm =
(InputMethodManager)
getActivity().getSystemService(Context.INPUT_METHOD_SERVICE);
imm.showSoftInput(mPassphraseEditText, InputMethodManager.SHOW_IMPLICIT);
}
});
}
});
mPassphraseEditText.requestFocus();
mPassphraseEditText.setImeActionLabel(
getString(android.R.string.ok), EditorInfo.IME_ACTION_DONE);
mPassphraseEditText.setOnEditorActionListener(this);
if ((keyType == CanonicalizedSecretKey.SecretKeyType.DIVERT_TO_CARD
&& Preferences.getPreferences(activity).useNumKeypadForYubiKeyPin())
|| keyType == CanonicalizedSecretKey.SecretKeyType.PIN) {
mPassphraseEditText.setInputType(InputType.TYPE_CLASS_NUMBER);
mPassphraseEditText.setTransformationMethod(PasswordTransformationMethod.getInstance());
} else {
mPassphraseEditText.setRawInputType(
InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);
}
mPassphraseEditText.setTransformationMethod(PasswordTransformationMethod.getInstance());
AlertDialog dialog = alert.create();
dialog.setButton(
DialogInterface.BUTTON_POSITIVE,
activity.getString(R.string.btn_unlock),
(DialogInterface.OnClickListener) null);
return dialog;
}