| /** |
| * |
| * Copyright 2003-2005 The Apache Software Foundation |
| * |
| * 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 org.apache.geronimo.javamail.authentication; |
| |
| import java.io.UnsupportedEncodingException; |
| |
| import javax.mail.MessagingException; |
| |
| public class LoginAuthenticator implements ClientAuthenticator { |
| |
| // constants for the authentication stages |
| protected static final int USERNAME = 0; |
| |
| protected static final int PASSWORD = 1; |
| |
| protected static final int COMPLETE = 2; |
| |
| // the user we're authenticating |
| protected String username; |
| |
| // the user's password (the "shared secret") |
| protected String password; |
| |
| // indicates whether we've gone through the entire challenge process. |
| protected int stage = USERNAME; |
| |
| /** |
| * Main constructor. |
| * |
| * @param username |
| * The login user name. |
| * @param password |
| * The login password. |
| */ |
| public LoginAuthenticator(String username, String password) { |
| this.username = username; |
| this.password = password; |
| } |
| |
| /** |
| * Respond to the hasInitialResponse query. This mechanism does not have an |
| * initial response. |
| * |
| * @return Always returns false; |
| */ |
| public boolean hasInitialResponse() { |
| return false; |
| } |
| |
| /** |
| * Indicate whether the challenge/response process is complete. |
| * |
| * @return True if the last challenge has been processed, false otherwise. |
| */ |
| public boolean isComplete() { |
| return stage == COMPLETE; |
| } |
| |
| /** |
| * Retrieve the authenticator mechanism name. |
| * |
| * @return Always returns the string "LOGIN" |
| */ |
| public String getMechanismName() { |
| return "LOGIN"; |
| } |
| |
| /** |
| * Evaluate a PLAIN login challenge, returning the a result string that |
| * should satisfy the clallenge. |
| * |
| * @param challenge |
| * The decoded challenge data, as a byte array |
| * |
| * @return A formatted challege response, as an array of bytes. |
| * @exception MessagingException |
| */ |
| public byte[] evaluateChallenge(byte[] challenge) throws MessagingException { |
| |
| // process the correct stage for the challenge |
| switch (stage) { |
| // should never happen |
| case COMPLETE: |
| throw new MessagingException("Invalid LOGIN challenge"); |
| |
| case USERNAME: { |
| byte[] userBytes; |
| |
| try { |
| // get the username and password in an UTF-8 encoding to create |
| // the token |
| userBytes = username.getBytes("UTF-8"); |
| } catch (UnsupportedEncodingException e) { |
| // got an error, fail this (this should never happen). |
| throw new MessagingException("Invalid encoding"); |
| } |
| |
| // next time through we're looking for a password. |
| stage = PASSWORD; |
| // the user bytes are the entire challenge respose. |
| return userBytes; |
| } |
| |
| case PASSWORD: { |
| byte[] passBytes; |
| |
| try { |
| // get the username and password in an UTF-8 encoding to create |
| // the token |
| passBytes = password.getBytes("UTF-8"); |
| } catch (UnsupportedEncodingException e) { |
| // got an error, fail this (this should never happen). |
| throw new MessagingException("Invalid encoding"); |
| } |
| // we're finished |
| stage = COMPLETE; |
| return passBytes; |
| } |
| } |
| // should never get here. |
| throw new MessagingException("Invalid LOGIN challenge"); |
| } |
| } |