/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.wss4j.dom.common;
import org.apache.wss4j.common.ext.WSPasswordCallback;
import org.apache.wss4j.common.ext.WSSecurityException;
import org.apache.wss4j.dom.util.WSSecurityUtil;
import org.apache.xml.security.utils.Base64;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.UnsupportedCallbackException;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
/**
* A Callback Handler implementation for the case of storing a secret key.
*/
public class SecretKeyCallbackHandler implements CallbackHandler {
private Map<String, byte[]> secrets = new HashMap<String, byte[]>();
private byte[] outboundSecret = null;
public void handle(Callback[] callbacks)
throws IOException, UnsupportedCallbackException {
for (int i = 0; i < callbacks.length; i++) {
if (callbacks[i] instanceof WSPasswordCallback) {
WSPasswordCallback pc = (WSPasswordCallback) callbacks[i];
if ((pc.getUsage() == WSPasswordCallback.SECRET_KEY)
|| (pc.getUsage() == WSPasswordCallback.SECURITY_CONTEXT_TOKEN)) {
byte[] secret = this.secrets.get(pc.getIdentifier());
if (secret == null) {
secret = outboundSecret;
}
pc.setKey(secret);
break;
}
} else {
throw new UnsupportedCallbackException(callbacks[i], "Unrecognized Callback");
}
}
}
public void addSecretKey(String identifier, byte[] secretKey) {
secrets.put(identifier, secretKey);
}
public void setOutboundSecret(byte[] secret) throws WSSecurityException {
outboundSecret = secret;
byte[] encodedBytes = WSSecurityUtil.generateDigest(outboundSecret);
String identifier = Base64.encode(encodedBytes);
addSecretKey(identifier, outboundSecret);
}
}