Kerberos Auth与JAAS和多个领域

Question

所有,

任何人都可以提供有关如何使用JAAS LoginContext对多个KDC/Realm组合进行身份验证的建议.换句话说,如果尝试1对领域A失败,请尝试领域B.

像下面的伪代码.

一如既往,非常感谢任何帮助.

查看plaincopy到clipboardprint？

[realms]   
  some.address.for.auth.one  
  {  
     kdc = some.address.one  
  }  

  some.address.for.auth.two  
  {  
     kdc = some.address.two  
  }  

boolean loginSuccess = false;  

try  
{  
   LoginContext lc = new LoginContext(...);  
   //Try Realm 1  
   lc.login();  
   loginSuccess = true;  
}  
catch(LoginException le)  
{  
  try  
  {  
     LoginContext lc2 = new LoginContext(...);  
     //Try Realm 2  
     lc2.login();  
     loginSuccess = true;  
  }  
  catch(LoginException le)  
  {  
     //...  
  }  
}  

return loginSuccess;  

Answer 1

这是可能的。例如，您可以将每个配置放在单独的文件中，然后在每次尝试开始时将 Java 路径传递给 krb5.ini 和 login.conf 文件：

boolean loginSuccess = false;  

try  
{  
   System.setProperty("java.security.krb5.conf", "C:\kerb\conf1\krb5.ini");
   System.setProperty("java.security.auth.login.config", "C:\kerb\conf1\login.conf");
   // in login.conf you can have defined path to keytab for this configuration

   LoginContext lc = new LoginContext(...);  
   //Try Realm 1  
   lc.login();  
   loginSuccess = true;  
}  
catch(LoginException le)  
{  
  try  
  {  
     System.setProperty("java.security.krb5.conf", "C:\kerb\conf2\krb5.ini");
     System.setProperty("java.security.auth.login.config", "C:\kerb\conf2\login.conf");
     // in login.conf you can have defined path to keytab for this configuration

     LoginContext lc2 = new LoginContext(...);  
     //Try Realm 2  
     lc2.login();  
     loginSuccess = true;  
  }  
  catch(LoginException le)  
  {  
     //...  
  }  
}  

return loginSuccess;  

这两个系统属性如下所述： http://docs.oracle.com/javase/7/docs/technotes/guides/security/jgss/tutorials/LoginConfigFile.html和 http://docs.oracle.com/javase/ 7/docs/technotes/guides/security/jgss/tutorials/KerberosReq.html

另一种可能性是没有文件的配置。有一个 LoginContext 构造函数，它接受 CallbackHandler（在这里您传递用户名和密码）和 Configuration（在这里您传递 login.conf 中的参数）。Kdc和realm可以在系统属性java.security.krb5.realm和java.security.krb5.kdc中传递

http://docs.oracle.com/javase/8/docs/api/javax/security/auth/login/LoginContext.html#LoginContext-java.lang.String-javax.security.auth.Subject-javax.security。 auth.callback.CallbackHandler-javax.security.auth.login.Configuration-