/* Copyright 2010 Google Inc.
*
* 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.code.samples.xoauth;
import net.oauth.OAuth;
import net.oauth.OAuthAccessor;
import net.oauth.OAuthConsumer;
import net.oauth.OAuthException;
import net.oauth.OAuthMessage;
import java.io.IOException;
import java.net.URISyntaxException;
import java.util.HashMap;
import java.util.Map;
/**
* Builds the XOAUTH SASL client response. This class has no internal state.
*/
public class XoauthSaslResponseBuilder {
/**
* Builds an XOAUTH SASL client response.
*
* @param userEmail The email address of the user, for example
* "xoauth@gmail.com".
* @param protocol The XoauthProtocol for which to generate an authentication
* string.
* @param tokenAndTokenSecret The OAuth token and token_secret.
* @param consumer The OAuth consumer that is trying to authenticate.
*
* @return A byte array containing the auth string suitable for being returned
* from {@code SaslClient.evaluateChallenge}. It needs to be base64-encoded
* before actually being sent over the network.
*/
public byte[] buildResponse(String userEmail,
XoauthProtocol protocol,
String oauthToken,
String oauthTokenSecret,
OAuthConsumer consumer)
throws IOException, OAuthException, URISyntaxException {
OAuthAccessor accessor = new OAuthAccessor(consumer);
accessor.tokenSecret = oauthTokenSecret;
Map<String, String> parameters = new HashMap<String, String>();
parameters.put(OAuth.OAUTH_SIGNATURE_METHOD, "HMAC-SHA1");
parameters.put(OAuth.OAUTH_TOKEN, oauthToken);
String url = String.format("https://mail.google.com/mail/b/%s/%s/",
userEmail,
protocol.getName());
OAuthMessage message = new OAuthMessage(
"GET",
url,
parameters.entrySet());
message.addRequiredParameters(accessor);
StringBuilder authString = new StringBuilder();
authString.append("GET ");
authString.append(url);
authString.append(" ");
int i = 0;
for (Map.Entry<String, String> entry : message.getParameters()) {
if (i++ > 0) {
authString.append(",");
}
authString.append(OAuth.percentEncode(entry.getKey()));
authString.append("=\"");
authString.append(OAuth.percentEncode(entry.getValue()));
authString.append("\"");
}
return authString.toString().getBytes();
}
}