org.apache.zeppelin.realm.PamRealm.java Source code

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Here is the source code for org.apache.zeppelin.realm.PamRealm.java

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/*
 * 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.zeppelin.realm;

import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.AuthenticationInfo;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.authc.SimpleAuthenticationInfo;
import org.apache.shiro.authc.UsernamePasswordToken;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;
import org.jvnet.libpam.PAM;
import org.jvnet.libpam.PAMException;
import org.jvnet.libpam.UnixUser;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.LinkedHashSet;
import java.util.Set;

/**
 * An {@code AuthorizingRealm} based on libpam4j.
 */
public class PamRealm extends AuthorizingRealm {
    private static final Logger LOG = LoggerFactory.getLogger(PamRealm.class);

    private String service;

    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals) {
        Set<String> roles = new LinkedHashSet<>();

        UserPrincipal user = principals.oneByType(UserPrincipal.class);

        if (user != null) {
            roles.addAll(user.getUnixUser().getGroups());
        }

        return new SimpleAuthorizationInfo(roles);
    }

    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {
        UsernamePasswordToken userToken = (UsernamePasswordToken) token;
        UnixUser user;

        try {
            user = (new PAM(this.getService())).authenticate(userToken.getUsername(),
                    new String(userToken.getPassword()));
        } catch (PAMException e) {
            throw new AuthenticationException("Authentication failed for PAM.", e);
        }

        return new SimpleAuthenticationInfo(new UserPrincipal(user), userToken.getCredentials(), getName());
    }

    public String getService() {
        return service;
    }

    public void setService(String service) {
        this.service = service;
    }
}