cas与NGINX整合（转）

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CAS (5) —— Nginx代理模式下浏览器访问CAS服务器配置详解

标签：服务器

2015-12-18 15:04 1633人阅读评论(0) 收藏举报

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网络（61）

目录(?)[+]

http://www.cnblogs.com/richaaaard/p/5053108.html

tomcat版本: tomcat-8.0.29

jdk版本: jdk1.8.0_65

nginx版本: nginx-1.9.8

cas版本: cas4.1.2
cas-client-3.4.1

参考来源:

jasig.github.io:CAS protocol

https://github.com/Jasig/java-cas-client

通过Proxy访问其它Cas应用

CAS负载均衡配置——SSL篇

CAS负载均衡配置

CAS客户端集群

以下的示例采用我博客的另外两篇文章中搭建好的测试环境举例

CAS (1) —— Mac下配置CAS到Tomcat（服务端）

CAS (2) —— Mac下配置CAS到Tomcat（客户端）

CAS (3) —— Mac下配置CAS客户端经代理访问Tomcat CAS

Mac为nginx安装nginx-sticky-module

【高可用HA】Nginx (1) —— Mac下配置Nginx Http负载均衡(Load Balancer)之101实例

Nginx (2) —— Mac下配置Apache Httpd的Https/SSL （待出）

目标架构

此代理非彼代理

在CAS官方网站上给出了一个“Proxy Web Flow Diagram”：

顺序图：(来源于http://jasig.github.io/cas/4.0.x/protocol/CAS-Protocol.html)

这个方案主要适用一种场景：

有两个应用App1和App2，它们都是受Cas Server保护的，即请求它们时都需要通过Cas Server的认证。现需要在App1中通过Http请求访问App2，显然该请求将会被App2配置的Cas的AuthenticationFilter拦截并转向Cas Server，Cas Server将引导用户进行登录认证，这样我们也就不能真正的访问到App2了。针对这种应用场景，Cas也提供了对应的支持。通过Proxy访问其它Cas应用

无论是用中文关键字在“度娘”，还是用英文关键字再“谷哥”上搜索，多数文章都是描述上面这样一个场景。

而我这里介绍的“代理”，并非是上述场景——依靠代理去验证ticket，“代理”在此的角色是：

只做分发反向代理（未来的负载均衡器）

* 注意：所以说“此代理非彼代理”

准备

要搭建上面这个环境会相对复杂，我们需要参照之前的文章准备以下必备的组件或环境：

2个Tomcat服务器作为客户端应用程序服务器（即cas的客户端）
app1.hoau.com:8081/8413(http/https) app2.hoau.com:8082/8423(http/https)
参照Tomcat Cluster、Tomcat SSL和CAS Client
1个配置好SSL的Nginx服务器作为中间层代理转发服务器（后可扩展为LoadBalancer）
proxy.sso.hoau.com:85/443(http/https)
参照Nginx Load Balancer与Nginx Sticky Session
另一个1个带有SSL的Tomcat服务器作为CAS服务器
sso.hoau.com:8083/8433(http/https)
参照Tomcat SSL与CAS Server

关键配置

代理服务器（Nginx x 1）
nginx.conf
- http
  server:
  server { listen 85; server_name proxy.sso.hoau.com; location / { #index index.html index.htm; #设置主机头和客户端真实地址，以便服务器获取客户端真实IP proxy_set_header Host $host; proxy_set_header Referer $http_referer; proxy_set_header Cookie $http_cookie; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_redirect off; #禁用缓存 #proxy_buffering off; proxy_connect_timeout 3; proxy_send_timeout 30; proxy_read_timeout 30; proxy_pass http://cas_server_http; }
  upstream:
  upstream cas_server_http { #根据ip计算将请求分配各那个后端tomcat，许多人误认为可以解决session问题，其实并不能。 #同一机器在多网情况下，路由切换，ip可能不同 #ip_hash; #sticky; #Richard: http server localhost:8083 weight=1 srun_id=c; #server localhost:8084 weight=1 srun_id=c; jvm_route $cookie_JSESSIONID|sessionid reverse; }
  *注意：
  （1）以上的“jvm_route $cookie_JSESSIONID|sessionid reverse;”是关键配置，因为CAS是依赖于Session和Cookie进行身份验证的。
  （2）srun_id=c，其中“c”需要与CAS服务器Tomcat server.xml文件里的jvmRoute配置“
  <Engine name="Catalina" defaultHost="localhost" jvmRoute="c">”
- https
  server:
  server { listen 443; server_name proxy.sso.hoau.com; ssl on; ssl_certificate /Users/Richard/Documents/Dev/servers/cluster/nginx/keys/server.crt; ssl_certificate_key /Users/Richard/Documents/Dev/servers/cluster/nginx/keys/server.key; ssl_session_timeout 5m; ssl_protocols SSLv3 TLSv1; ssl_ciphers ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP; ssl_prefer_server_ciphers on; location / { proxy_redirect off; proxy_set_header Host $host; proxy_set_header Referer $http_referer; proxy_set_header Cookie $http_cookie; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header X-FORWARDED-HOST $server_addr; proxy_set_header X-FORWARDED-PORT $server_port; proxy_connect_timeout 3; proxy_send_timeout 30; proxy_read_timeout 30; proxy_pass https://cas_server_ssl; } }
  *注意：以上的ssl为关键配置“ssl_certificate”和“ssl_certificate_key”需要指向正确的证书和密钥。
  upstream：
  upstream cas_server_ssl { #Richard: https todo server sso.hoau.com:8433 weight=1 srun_id=c; #server sso.hoau.com:8443 weight=1 srun_id=c; jvm_route $cookie_JSESSIONID|sessionid reverse; }

*注意：以上http和https可以只配一项，或两者兼存皆可，端口不要冲突。

CAS客户端应用服务器（Tomcat x 2）
以下客户端的蓝本可以在github上收到（关键字：“cas-sample-java-webapp”），我这里只贴出自己的关键点和修改后的结果。
CAS客户端的应用服务器有两台，如果不使用Spring Security的集成，比较关键配置就只有pom.xml（编译）和web.xml（部署）：
- 两个环境编译类似，pom.xml（贴全了，有无冗余请自行解决）：
  *注意：以下Spring Security相关依赖为非必须
  <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>iamlabs.unicon.net</groupId> <artifactId>cas-sample-java-webapp</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>war</packaging> <name>CAS Example Java Web App</name> <description>A sample web application that exercises the CAS protocol features via the Java CAS Client.</description> <build> <finalName>cas-sample-java-webapp</finalName> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>2.5.1</version> <configuration> <source>1.7</source> <target>1.7</target> </configuration> </plugin> </plugins> </build> <properties> <spring.version>3.2.4.RELEASE</spring.version> <casclient.version>3.4.1</casclient.version> </properties> <dependencies> <dependency> <groupId>commons-logging</groupId> <artifactId>commons-logging</artifactId> <version>1.1.1</version> </dependency>  <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.7.13</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-simple</artifactId> <version>1.7.13</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>1.7.13</version> </dependency> <dependency> <groupId>org.opensaml</groupId> <artifactId>opensaml1</artifactId> <version>1.1</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.1.0</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.jasig.cas.client</groupId> <artifactId>cas-client-core</artifactId> <version>${casclient.version}</version> <exclusions> <exclusion> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.jasig.cas.client</groupId> <artifactId>cas-client-integration-tomcat-common</artifactId> <version>${casclient.version}</version> </dependency> <dependency> <groupId>commons-codec</groupId> <artifactId>commons-codec</artifactId> <version>1.6</version> </dependency> <dependency> <groupId>org.apache.santuario</groupId> <artifactId>xmlsec</artifactId> <version>1.4.3</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework.security</groupId> <artifactId>spring-security-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework.security</groupId> <artifactId>spring-security-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework.security</groupId> <artifactId>spring-security-config</artifactId> <version>${spring.version}</version> </dependency> </dependencies> </project>
- https://app1.hoau.com:8413
  web.xml:
  <?xml version="1.0" encoding="UTF-8"?> <web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <context-param> <param-name>log4jConfigLocation</param-name> <param-value>/WEB-INF/log4j.properties</param-value> </context-param> <listener> <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class> </listener>  <filter> <filter-name>CAS Validation Filter</filter-name> <filter-class>org.jasig.cas.client.validation.Cas20ProxyReceivingTicketValidationFilter</filter-class>   <init-param> <param-name>casServerUrlPrefix</param-name>  <param-value>https://proxy.sso.hoau.com:443/cas</param-value> </init-param>  <init-param> <param-name>serverName</param-name> <param-value>https://app1.hoau.com:8413</param-value> </init-param> <init-param> <param-name>redirectAfterValidation</param-name> <param-value>true</param-value> </init-param> <init-param> <param-name>useSession</param-name> <param-value>true</param-value> </init-param> <init-param> <param-name>acceptAnyProxy</param-name> <param-value>true</param-value> </init-param>   </filter><filter> <filter-name>CAS Authentication Filter</filter-name> <filter-class>org.jasig.cas.client.authentication.AuthenticationFilter</filter-class>   <init-param> <param-name>casServerLoginUrl</param-name>  <param-value>https://proxy.sso.hoau.com:443/cas/login</param-value> </init-param> <init-param> <param-name>serverName</param-name> <param-value>https://app1.hoau.com:8413</param-value> </init-param> </filter><filter> <filter-name>CAS HttpServletRequest Wrapper Filter</filter-name> <filter-class>org.jasig.cas.client.util.HttpServletRequestWrapperFilter</filter-class> </filter><filter-mapping> <filter-name>CAS Validation Filter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping><filter-mapping> <filter-name>CAS Authentication Filter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping><filter-mapping> <filter-name>CAS HttpServletRequest Wrapper Filter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <welcome-file-list> <welcome-file> index.jsp </welcome-file> </welcome-file-list> </web-app>
  *注意：
  - “CAS Validation Filter”需要放在“CAS Authentication Filter”之前
  - 此代理非彼代理
  网上一些文章说的需要配置诸如：
  1. “SingleSignOutHttpSessionListener”
  2. “SingleSignOutFilter”
  3. “ticketValidatorClass”
  4. “ProxyValidate”
  5. “ProxyTicketReceptor”
  均不需要
  - 如果误配了SingleSignOutFilter，会出现异常
    Caused by: java.io.IOException: Server returned HTTP response code: 500 for URL: https://proxy.sso.hoau.com:443/cas/proxyValidate?ticket=ST-31-TM9EbFoQbasNdXh11HaJ-cas01.sso.hoau.com&service=https%3A%2F%2Fapp2.hoau.com%3A8423%2Fcas2%3Bjsessionid%3D0CEB865B53E64FF31BF02A496DF73860.tomcat2
  at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1840) at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1441) at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254) at org.jasig.cas.client.util.CommonUtils.getResponseFromServer(CommonUtils.java:429) ... 24 more

* https://app2.hoau.com:8423 web.xml配置同上 >*注意：修改端口

CAS服务器（Tomcat x 1）
- 服务端https://sso.hoau.com:8433
  *注意：
  系列文章CAS (1) —— Mac下配置CAS到Tomcat（服务端）中介绍服务端配置也无需任何修改。
  以下配置：
  1. “Proxy (PGT acquisition)”
  2. “Modern proxy-service validation”
  均不需要