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71 lines
2.6 KiB
Java
71 lines
2.6 KiB
Java
/**
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* Copyright 2015 LinkedIn Corp. All rights reserved.
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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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*/
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package security;
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import javax.security.auth.callback.NameCallback;
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import javax.security.auth.callback.PasswordCallback;
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import javax.security.auth.callback.UnsupportedCallbackException;
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import javax.naming.AuthenticationException;
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import javax.naming.NamingException;
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import javax.security.auth.login.LoginContext;
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import javax.security.auth.login.LoginException;
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import javax.security.auth.callback.CallbackHandler;
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import javax.security.auth.callback.Callback;
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import com.google.common.base.Preconditions;
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public class AuthenticationManager {
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public static void authenticateUser(String userName, String password) throws NamingException {
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Preconditions.checkNotNull(userName, "Username String cannot be null");
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Preconditions.checkNotNull(password, "Password String cannot be null");
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Preconditions.checkArgument(!userName.isEmpty(), "Username cannot be empty");
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Preconditions.checkArgument(!password.isEmpty(), "Password cannot be empty");
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try {
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LoginContext lc = new LoginContext("WHZ-Authentication", new WHZCallbackHandler(userName, password));
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lc.login();
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} catch (LoginException le) {
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throw new AuthenticationException(le.toString());
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}
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}
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private static class WHZCallbackHandler implements CallbackHandler {
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private String password = null;
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private String username = null;
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private WHZCallbackHandler(String username, String password) {
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this.username = username;
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this.password = password;
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}
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@Override
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public void handle(Callback[] callbacks)
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throws UnsupportedCallbackException {
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NameCallback nc = null;
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PasswordCallback pc = null;
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for (Callback callback : callbacks) {
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if (callback instanceof NameCallback) {
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nc = (NameCallback) callback;
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nc.setName(this.username);
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} else if (callback instanceof PasswordCallback) {
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pc = (PasswordCallback) callback;
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pc.setPassword(this.password.toCharArray());
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} else {
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throw new UnsupportedCallbackException(callback, "The submitted Callback is unsupported");
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}
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}
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}
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}
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}
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