[jcifs] Version 1.3.1 bug (and fix)

John.Baker at barclayscapital.com John.Baker at barclayscapital.com
Wed Dec 3 11:44:53 GMT 2008


I think I've found a bug in version 1.3.1 when using the NtlmHttpFilter.
Having configured the system and watched it work, I then configured


Restarted and it failed with this exception:

jcifs.smb.SmbException: NTLMv2 requires extended security
(jcifs.smb.client.useExtendedSecurity must be true if
jcifs.smb.lmCompatibility >= 3)
	at jcifs.smb.SmbSession.sessionSetup(SmbSession.java:295)
	at jcifs.smb.SmbSession.send(SmbSession.java:234)
	at jcifs.smb.SmbTree.treeConnect(SmbTree.java:161)
	at jcifs.smb.SmbSession.interrogate(SmbSession.java:83)
	at jcifs.http.NtlmHttpFilter.negotiate(NtlmHttpFilter.java:157)
	at jcifs.http.NtlmHttpFilter.doFilter(NtlmHttpFilter.java:121)

(Be sure to start a new browser window.)

Looking at NtlmPasswordAuthentication:

    private static final int LM_COMPATIBILITY =
            Config.getInt("jcifs.smb.lmCompatibility", 3);

That is clearly wrong as it sets the compatibility when the class is
first created (but I guess, never again).  Hence, when the logging
occurs, the value is set incorrectly and before it's been reset by the

Removing 'static' fixes the problem.



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