popa3d-users - Re: virtual.c another question

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Date: Sun, 30 Mar 2003 15:57:08 +0400
From: Solar Designer <solar@...nwall.com>
To: popa3d-users@...ts.openwall.com
Subject: Re: virtual.c another question

On Sun, Mar 30, 2003 at 05:18:05PM +0600, Boris Kovalenko wrote:
> Solar Designer wrote:
> >On Sun, Mar 30, 2003 at 01:29:38PM +0600, Boris Kovalenko wrote:
> >>Why to run other code if we already know that user is invalid? Why lstat 
> >>directory and try to open file for this "INVALID" user?
> >
> >This is to reduce information leaks via timing.
> 
> What type of information?

It's primarily whether a username corresponds to an existing mail
account or not.

> May be I need do the same within my module? 

Very likely so.

I'm afraid these discussions on programming topics are of no use to
most popa3d-users subscribers.  If anyone is annoyed by them, please
let me know and I'll be bringing them off-list in the future.

-- 
/sd