Android Open Source - google-authenticator-android Enter Key Activity

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License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright 2009 Google Inc. All Rights Reserved.
 *//from   ww  w . ja  v  a2s  .c o  m
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.android.apps.authenticator;

import com.google.android.apps.authenticator.AccountDb.OtpType;
import com.google.android.apps.authenticator.Base32String.DecodingException;
import com.google.android.apps.authenticator.wizard.WizardPageActivity;
import com.google.android.apps.authenticator2.R;

import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.Spinner;

import java.io.Serializable;

/**
 * The activity that lets the user manually add an account by entering its name, key, and type
 * (TOTP/HOTP).
 *
 * @author sweis@google.com (Steve Weis)
 */
public class EnterKeyActivity extends WizardPageActivity<Serializable> implements TextWatcher {
  private static final int MIN_KEY_BYTES = 10;
  private EditText mKeyEntryField;
  private EditText mAccountName;
  private Spinner mType;

  /**
   * Called when the activity is first created
   */
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setPageContentView(R.layout.enter_key);

    // Find all the views on the page
    mKeyEntryField = (EditText) findViewById(R.id.key_value);
    mAccountName = (EditText) findViewById(R.id.account_name);
    mType = (Spinner) findViewById(R.id.type_choice);

    ArrayAdapter<CharSequence> types = ArrayAdapter.createFromResource(this,
        R.array.type, android.R.layout.simple_spinner_item);
    types.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    mType.setAdapter(types);

    // Set listeners
    mKeyEntryField.addTextChangedListener(this);

    mRightButton.setText(R.string.enter_key_page_add_button);
  }

  /*
   * Return key entered by user, replacing visually similar characters 1 and 0.
   */
  private String getEnteredKey() {
    String enteredKey = mKeyEntryField.getText().toString();
    return enteredKey.replace('1', 'I').replace('0', 'O');
  }

  /*
   * Verify that the input field contains a valid base32 string,
   * and meets minimum key requirements.
   */
  private boolean validateKeyAndUpdateStatus(boolean submitting) {
    String userEnteredKey = getEnteredKey();
    try {
      byte[] decoded = Base32String.decode(userEnteredKey);
      if (decoded.length < MIN_KEY_BYTES) {
        // If the user is trying to submit a key that's too short, then
        // display a message saying it's too short.
        mKeyEntryField.setError(submitting ? getString(R.string.enter_key_too_short) : null);
        return false;
      } else {
        mKeyEntryField.setError(null);
        return true;
      }
    } catch (DecodingException e) {
      mKeyEntryField.setError(getString(R.string.enter_key_illegal_char));
      return false;
    }
  }

  @Override
  protected void onRightButtonPressed() {
    // TODO(cemp): This depends on the OtpType enumeration to correspond
    // to array indices for the dropdown with different OTP modes.
    OtpType mode = mType.getSelectedItemPosition() == OtpType.TOTP.value ?
                   OtpType.TOTP :
                   OtpType.HOTP;
    if (validateKeyAndUpdateStatus(true)) {
      AuthenticatorActivity.saveSecret(this,
          mAccountName.getText().toString(),
          getEnteredKey(),
          null,
          mode,
          AccountDb.DEFAULT_HOTP_COUNTER);
      exitWizard();
    }
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public void afterTextChanged(Editable userEnteredValue) {
    validateKeyAndUpdateStatus(false);
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {
    // Do nothing
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {
    // Do nothing
  }
}

Java Source Code List

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