Liferay7 BPM门户开发之32: 实现自定义认证登陆（定制Authentication Hook）

第一步：修改liferay-hook.xml

<?xml version="1.0"?>
<!DOCTYPE hook PUBLIC "-//Liferay//DTD Hook 6.2.0//EN" "http://www.liferay.com/dtd/liferay-hook_6_2_0.dtd">

<hook>
<portal-properties>portal.properties</portal-properties>
</hook>

如果是liferay7则不需要这一步，只需要注解：

@Component(
immediate = true, property = {"key=auth.pipeline.pre"},
service = Authenticator.class
)

第二步：配置认证属性portal.properties

auth.pipeline.pre=com.proliferay.YourAuthenticator

配置auth.pipeline.post 还将进行密码检查，liferay的内部机制是2级检查，一级是身份认证，二级是密码检查，实际上可以通过SKIP_LIFERAY_CHECK来统一处理

第三步：开发定制的认证类

import java.util.Map;
import com.liferay.portal.security.auth.AuthException;
import com.liferay.portal.security.auth.Authenticator;

public class YourAuthenticator implements Authenticator {

    @Override
    public int authenticateByEmailAddress(long companyId, String emailAddress,
            String password, Map<String, String[]> headerMap,
            Map<String, String[]> parameterMap) throws AuthException {

        /**
         * 这里是认证的逻辑
         */

        return SKIP_LIFERAY_CHECK;
    }

    @Override
    public int authenticateByScreenName(long companyId, String screenName,
            String password, Map<String, String[]> headerMap,
            Map<String, String[]> parameterMap) throws AuthException {

        return DNE;
    }

    @Override
    public int authenticateByUserId(long companyId, long userId,
            String password, Map<String, String[]> headerMap,
            Map<String, String[]> parameterMap) throws AuthException {
        return DNE;
    }

}

常数定义：

• public static final int DNE = 0; //用户不存在
• public static final int FAILURE = -1;//认证失败
• public static final int SKIP_LIFERAY_CHECK = 2;
• public static final int SUCCESS = 1;

要注意SKIP_LIFERAY_CHECK和SUCCESS的区别，通过SKIP_LIFERAY_CHECK来统一处理身份认证，跳过门户的密码检查，如果返回SUCCESS，则必须配合auth.pipeline.post来进行密码检查。
通过图来说明：

一个具体的例子：

集成Apache Shiro的认证登陆

import com.liferay.portal.kernel.log.Log;
import com.liferay.portal.kernel.log.LogFactoryUtil;
import com.liferay.portal.kernel.security.auth.AuthException;
import com.liferay.portal.kernel.security.auth.Authenticator;

import java.util.Map;

import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.UsernamePasswordToken;
import org.apache.shiro.config.IniSecurityManagerFactory;
import org.apache.shiro.mgt.SecurityManager;
import org.apache.shiro.subject.Subject;
import org.apache.shiro.util.Factory;

import org.osgi.service.component.annotations.Activate;
import org.osgi.service.component.annotations.Component;

@Component(
    immediate = true, property = {"key=auth.pipeline.pre"},
    service = Authenticator.class
)
public class ShiroAuthenticatorPre implements Authenticator {

    @Activate
    public void activate() {
        Factory<SecurityManager> factory = new IniSecurityManagerFactory(
            "classpath:userauth.ini"); //shiro配置文件

        SecurityUtils.setSecurityManager(factory.getInstance());

        if (_log.isInfoEnabled()) {
            _log.info("activate");
        }
    }

    @Override
    public int authenticateByEmailAddress(
            long companyId, String emailAddress, String password,
            Map<String, String[]> headerMap, Map<String, String[]> parameterMap)
        throws AuthException {

        if (_log.isInfoEnabled()) {
            _log.info("authenticateByEmailAddress");
        }

        UsernamePasswordToken usernamePasswordToken = new UsernamePasswordToken(
            emailAddress, password);

        Subject currentUser = SecurityUtils.getSubject();

        try {
            //shiro的代理登陆
            currentUser.login(usernamePasswordToken);

            boolean authenticated = currentUser.isAuthenticated();

            if (authenticated) {
                if (_log.isInfoEnabled()) {
                    _log.info("authenticated");
                }

                return SKIP_LIFERAY_CHECK; //认证通过
            }
            else {
                return FAILURE;
            }
        }
        catch (AuthenticationException ae) {
            _log.error(ae.getMessage(), ae);
            throw new AuthException(ae.getMessage(), ae);
        }
    }

    @Override
    public int authenticateByScreenName(
            long companyId, String screenName, String password,
            Map<String, String[]> headerMap, Map<String, String[]> parameterMap)
        throws AuthException {

        if (_log.isInfoEnabled()) {
            _log.info("authenticateByScreenName  - not implemented ");
        }

        return SUCCESS;
    }

    @Override
    public int authenticateByUserId(
            long companyId, long userId, String password,
            Map<String, String[]> headerMap, Map<String, String[]> parameterMap)
        throws AuthException {

        if (_log.isInfoEnabled()) {
            _log.info("authenticateByScreenName  - not implemented ");
        }

        return SUCCESS;
    }

    private static final Log _log = LogFactoryUtil.getLog(
        ShiroAuthenticatorPre.class);

}

apache shiro框架结构

apache shiro是一套非常著名的安全框架，提供了认证、授权、加密和会话管理功能
了解更多apache shiro的知识：http://www.infoq.com/cn/articles/apache-shiro

Authentication的Token令牌机制
了解更多Authentication Token：https://web.liferay.com/zh/community/wiki/-/wiki/Main/Authentication+Token

Token令牌是为了避免CSRF跨站伪造。
了解更多CSRF：https://www.owasp.org/index.php/Cross-Site_Request_Forgery_(CSRF)

定义认证失败的扩展处理

import com.liferay.portal.kernel.exception.PortalException;
import com.liferay.portal.kernel.log.Log;
import com.liferay.portal.kernel.log.LogFactoryUtil;
import com.liferay.portal.kernel.model.User;
import com.liferay.portal.kernel.security.auth.AuthException;
import com.liferay.portal.kernel.security.auth.AuthFailure;
import com.liferay.portal.kernel.service.UserLocalServiceUtil;
import java.util.Map;
import org.osgi.service.component.annotations.Component;

@Component(
    immediate = true, property = {"key=auth.failure"},
    service = AuthFailure.class
)
public class LogAuthFailure implements AuthFailure {

    @Override
    public void onFailureByEmailAddress(
            long companyId, String emailAddress,
            Map<String, String[]> headerMap, Map<String, String[]> parameterMap)
        throws AuthException {

        try {
            User user = UserLocalServiceUtil.getUserByEmailAddress(
                companyId, emailAddress);

            int failures = user.getFailedLoginAttempts();

            if (_log.isInfoEnabled()) {
                _log.info(
                    "onFailureByEmailAddress: " + emailAddress +
                        " has failed to login " + failures + " times");
            }
        }
        catch (PortalException pe) {
        }
    }

    @Override
    public void onFailureByScreenName(
            long companyId, String screenName, Map<String, String[]> headerMap,
            Map<String, String[]> parameterMap)
        throws AuthException {

        try {
            User user = UserLocalServiceUtil.getUserByScreenName(
                companyId, screenName);

            int failures = user.getFailedLoginAttempts();

            if (_log.isInfoEnabled()) {
                _log.info(
                    "onFailureByScreenName: " + screenName +
                        " has failed to login " + failures + " times");
            }
        }
        catch (PortalException pe) {
        }
    }

    @Override
    public void onFailureByUserId(
            long companyId, long userId, Map<String, String[]> headerMap,
            Map<String, String[]> parameterMap)
        throws AuthException {

        try {
            User user = UserLocalServiceUtil.getUserById(userId);

            int failures = user.getFailedLoginAttempts();

            if (_log.isInfoEnabled()) {
                _log.info(
                    "onFailureByUserId: userId " + userId +
                        " has failed to login " + failures + " times");
            }
        }
        catch (PortalException pe) {
        }
    }

    private static final Log _log = LogFactoryUtil.getLog(LogAuthFailure.class);

}

优秀的平台必然松耦合、易扩展。