org.springframework.security.oauth2.client.token.DefaultClientKeyGenerator Maven / Gradle / Ivy
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/*
* Copyright 2006-2011 the original author or authors.
*
* 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
*
* https://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.springframework.security.oauth2.client.token;
import java.io.UnsupportedEncodingException;
import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.LinkedHashMap;
import java.util.Map;
import org.springframework.security.core.Authentication;
import org.springframework.security.oauth2.client.resource.OAuth2ProtectedResourceDetails;
import org.springframework.security.oauth2.common.util.OAuth2Utils;
/**
* Basic key generator taking into account the client id, scope and username (principal name) if they exist.
*
*
* @deprecated See the OAuth 2.0 Migration Guide for Spring Security 5.
*
* @author Dave Syer
*
*/
@Deprecated
public class DefaultClientKeyGenerator implements ClientKeyGenerator {
private static final String CLIENT_ID = "client_id";
private static final String SCOPE = "scope";
private static final String USERNAME = "username";
public String extractKey(OAuth2ProtectedResourceDetails resource, Authentication authentication) {
Map values = new LinkedHashMap();
if (authentication != null) {
values.put(USERNAME, authentication.getName());
}
values.put(CLIENT_ID, resource.getClientId());
if (resource.getScope() != null) {
values.put(SCOPE, OAuth2Utils.formatParameterList(resource.getScope()));
}
MessageDigest digest;
try {
digest = MessageDigest.getInstance("MD5");
}
catch (NoSuchAlgorithmException e) {
throw new IllegalStateException("MD5 algorithm not available. Fatal (should be in the JDK).");
}
try {
byte[] bytes = digest.digest(values.toString().getBytes("UTF-8"));
return String.format("%032x", new BigInteger(1, bytes));
}
catch (UnsupportedEncodingException e) {
throw new IllegalStateException("UTF-8 encoding not available. Fatal (should be in the JDK).");
}
}
}