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Difference between revisions of "Developing a preauth plugin"

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(Notes and Debugging Tips)
(Notes and Debugging Tips)
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* Include <code><syslog.h></code>, link against <code>kadm5<something></code> and make liberal use of <code>krb5_klog_syslog</code>
 
* Include <code><syslog.h></code>, link against <code>kadm5<something></code> and make liberal use of <code>krb5_klog_syslog</code>
 
* Testing a FAST factor preauth plugin such as <code>encrypted-challenge</code> : http://mailman.mit.edu/pipermail/krbdev/2010-April/008935.html
 
* Testing a FAST factor preauth plugin such as <code>encrypted-challenge</code> : http://mailman.mit.edu/pipermail/krbdev/2010-April/008935.html
* Make use of <code>preferred_preauth_types</code> in <code>krb5.conf</code>'s <code>[libdefaults]</code>
+
* Make use of <code>preferred_preauth_types</code> in the <code>[libdefaults]</code> section of <code>krb5.conf</code>

Revision as of 12:44, 30 April 2010

Recommended Reading

  • Read RFC 4210
  • Read draft-ietf-krb-wg-preauth-framework (version 16 current as of 4/27/2010)
  • Read src/include/krb5/preauth_plugin.h
  • Read src/plugins/preauth/encrypted_challenge/* for a (tragically) comment-less implementation of a preauth plugin implemented using FAST
  • ghudson's quick flow overview at http://mailman.mit.edu/pipermail/krbdev/2010-April/008891.html

Pre-authentication Limitations

  • There is no way to require that a certain preauth method is used.
  • Likewise, there is also no way to indicate a preferred preauth flow (method A, then B, then C).

References for above: http://mailman.mit.edu/pipermail/krbdev/2010-April/008902.html

Notes and Debugging Tips

  • Define DEBUG as part of your build to tickle logging of more info in your KDC log file (proabably krb5kdc.log).
  • Include <syslog.h>, link against kadm5<something> and make liberal use of krb5_klog_syslog
  • Testing a FAST factor preauth plugin such as encrypted-challenge : http://mailman.mit.edu/pipermail/krbdev/2010-April/008935.html
  • Make use of preferred_preauth_types in the [libdefaults] section of krb5.conf