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(New page: This setup will enable you to authenticate a user via spnego into your webapp. To run with spengo enabled the following command line options are required: -Djava.security.krb5.conf=/pat...)
 
 
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This setup will enable you to authenticate a user via spnego into your  
 
This setup will enable you to authenticate a user via spnego into your  
 
webapp.
 
webapp.

Latest revision as of 13:46, 30 April 2013


This setup will enable you to authenticate a user via spnego into your webapp.

To run with spengo enabled the following command line options are required:

-Djava.security.krb5.conf=/path/to/jetty/etc/krb5.ini -Djava.security.auth.login.config=/path/to/jetty/etc/spnego.conf -Djavax.security.auth.useSubjectCredsOnly=false

The easiest place to put these lines are in the start.ini file.

For debugging the spengo authentication the following options are helpful:

Dorg.eclipse.jetty.util.log.DEBUG=true -Dsun.security.spnego.debug=all


Spengo Authentication is enabled in the webapp with the following setup.

 <security-constraint>
   <web-resource-collection>
     <web-resource-name>Secure Area</web-resource-name>
     <url-pattern>/secure/me/*</url-pattern>
   </web-resource-collection>
   <auth-constraint>
     <role-name>MORTBAY.ORG</role-name>  <-- this is the domain that the user is a member of
   </auth-constraint>
 </security-constraint>
 <login-config>
   <auth-method>SPNEGO</auth-method>
   <realm-name>Test Realm</realm-name>
   (optionally to add custom error page)
   <spnego-login-config>
     <spengo-error-page>/loginError.html?param=foo</spnego-error-page>
   </spnego-login-config>
 </login-config>
  

A corresponding UserRealm needs to be created either programmatically if embedded, via the jetty.xml or in a context file for the webapp.

(in the jetty.xml)

  <Call name="addBean">
     <Arg>
       <New class="org.eclipse.jetty.security.SpnegoLoginService">
         <Set name="name">Test Realm</Set>
         <Set name="config"><Property name="jetty.home" default="."/>/etc/spnego.properties</Set>
       </New>
     </Arg>
   </Call>

(context file)

 <Get name="securityHandler">
   <Set name="loginService">
     <New class="org.eclipse.jetty.security.SpnegoLoginService">

<Set name="name">Test Realm</Set> <Set name="config"><SystemProperty name="jetty.home" default="."/>/etc/spnego.properties</Set>

     </New>
   </Set>
   <Set name="checkWelcomeFiles">true</Set>
 </Get>
 
 

Important Configuration Files:

spengo.properties - configures the user realm with runtime properties krb5.ini - configures the underlying kerberos setup spnego.conf - configures the glue between gssapi and kerberos

It is important to note that the keytab file referenced in the krb5.ini and the spengo.conf files needs to contain the keytab for the targetName for the http server. To do this use a process similar to this:

On the windows active domain controller run:

> setspn -A HTTP/linux.mortbay.org ADUser

To create the keytab file use the following process:

> ktpass -out c:\dir\krb5.keytab -princ HTTP/linux.mortbay.org@MORTBAY.ORG -mapUser ADUser -mapOp set -pass ADUserPWD -crypto RC4-HMAC-NT -pType KRB5_NT_PRINCIPAL

This step should give you the keytab file which should then be copied over to the machine running this http server and referenced from the configuration files. For our testing we put the keytab into the etc directory of jetty and referenced it from there.

Setting up your Browser:

Firefox:

  • browse to about:config and agree to the warnings
  • search through to find the 'network' settings

IE:

  • Tools -> Options -> Security -> Local Intranet -> Sites
    • make sure everything is checked here
  • Tools -> Options -> Security -> Local Intranet -> Sites -> Advanced
    • add url to server (http:// and/or https://) making sure to use the hostname
  • Tools -> Options -> Security -> Local Intranet -> Sites -> Advanced -> Close
  • Tools -> Options -> Security -> Local Intranet -> Sites -> Ok
  • Tools -> Options -> Advanced -> Security (in the checkbox list)
    • locate and check 'Enable Integrated Windows Authentication'
  • Tools -> Options -> Advanced -> Security -> Ok
  • close IE then reopen and browse to your spengo protected resource

NOTE: you must go to the hostname and not the IP, if you go to the IP it will default to NTLM authentication...the following conditions apply to having spnego work

  • Intranet Zone
  • Accessing the server using a Hostname rather then IP
  • Integrated Windows Authentication in IE is enabled, the host is trusted in Firefox
  • The Server is not local to the browser
  • The client's Kerberos system is authenticated to a domain controller