103 lines
3.0 KiB
Java
103 lines
3.0 KiB
Java
/* Copyright 2012 Google Inc.
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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 fr.xephi.authme.mail;
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import java.io.IOException;
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import java.util.logging.Logger;
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import javax.security.auth.callback.Callback;
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import javax.security.auth.callback.CallbackHandler;
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import javax.security.auth.callback.NameCallback;
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import javax.security.auth.callback.UnsupportedCallbackException;
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import javax.security.sasl.SaslClient;
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import javax.security.sasl.SaslException;
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/**
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* An OAuth2 implementation of SaslClient.
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*/
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class OAuth2SaslClient implements SaslClient {
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private static final Logger logger =
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Logger.getLogger(OAuth2SaslClient.class.getName());
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private final String oauthToken;
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private final CallbackHandler callbackHandler;
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private boolean isComplete = false;
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/**
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* Creates a new instance of the OAuth2SaslClient. This will ordinarily only
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* be called from OAuth2SaslClientFactory.
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*/
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public OAuth2SaslClient(String oauthToken,
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CallbackHandler callbackHandler) {
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this.oauthToken = oauthToken;
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this.callbackHandler = callbackHandler;
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}
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public String getMechanismName() {
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return "XOAUTH2";
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}
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public boolean hasInitialResponse() {
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return true;
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}
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public byte[] evaluateChallenge(byte[] challenge) throws SaslException {
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if (isComplete) {
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// Empty final response from server, just ignore it.
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return new byte[] { };
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}
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NameCallback nameCallback = new NameCallback("Enter name");
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Callback[] callbacks = new Callback[] { nameCallback };
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try {
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callbackHandler.handle(callbacks);
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} catch (UnsupportedCallbackException e) {
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throw new SaslException("Unsupported callback: " + e);
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} catch (IOException e) {
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throw new SaslException("Failed to execute callback: " + e);
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}
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String email = nameCallback.getName();
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byte[] response = String.format("user=%s\1auth=Bearer %s\1\1", email,
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oauthToken).getBytes();
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isComplete = true;
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return response;
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}
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public boolean isComplete() {
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return isComplete;
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}
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public byte[] unwrap(byte[] incoming, int offset, int len)
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throws SaslException {
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throw new IllegalStateException();
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}
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public byte[] wrap(byte[] outgoing, int offset, int len)
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throws SaslException {
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throw new IllegalStateException();
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}
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public Object getNegotiatedProperty(String propName) {
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if (!isComplete()) {
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throw new IllegalStateException();
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}
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return null;
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}
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public void dispose() throws SaslException {
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}
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} |