Please have a look at WSS4J Wiki - there is a explanation of
this behavior and the reason behind.

Regards,
Werner

Brian Bonner wrote:
> The callback handler for Passwords is called for both the Plaintext
> and the Digest scenarios.
> 
> However, it appears that only in the Digest scenario are the passwords
> checked with one another.  This doesn't seem to be consistent.
> 
> If the password returned for plaintext authentication doesn't match
> the password being sent in on the request,  shouldn't a
> 
> WSSecurityException(WSSecurityException.FAILED_AUTHENTICATION);
> 
> also be thrown?
> 
> 
> I believe this is happening because of the following:
> 
> 1.  The UsernameToken has:
> 
> protected boolean hashed = true;
> 
> so the default is that the CallbackHandler is called regardless of if
> it's Plaintext or Digest.
> 
> Second, this agrees with the specification of WSHandlerConstants which
> state that the Default is PW_DIGEST.
> 
> Yet according to this documentation (line 173 on page 9). PW_TEXT
> should be the default.
> http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-username-token-profile-1.0.pdf
> 
> 
> I realize that for WSS4J the desire is to have people use Digest
> authentication by default, but this can cause confusion with people
> who are new to WSS4J and sending requests in using plaintext over SSL
> connections.
> 
> 2.  The UsernameTokenProcessor only hits the callback if the
> usernameToken is hashed.
> 
> Based on this it appears that the original intent was that the
> CallbackHandler would only be for Digest passwords.
> 
> This would also seem to indicate that the CallbackHandler is not the
> place to call a login module to verify that the user is authenticated.
> 
> To me, this is confusing.
> 
> 
> This can probably be fixed by changing hashed = false.  and changing
> the WSHandlerConstant docs, which would make it more consistent with
> the OASIS docs.  But it seems like there is an opportunity to hook
> into a login module here for security purposes.
> 
> Thanks,
> 
> Brian
> 
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