I dont think you can get the cleartext from the password. 
The file which does the job of authenticating is d3des.c file in the source
code. 

The way it works on the vnc is 
server sends a challenge to client ->16 bytes
client reads the challenget and then encyrpt it with the password
and send back the response. 
Server knows the challenge it sent and then compare it with what it expects



-----Original Message-----
From: Alex K. Angelopoulos [mailto:[EMAIL PROTECTED]]
Sent: Friday, April 19, 2002 9:06 AM
To: VNC Mailing List
Subject: vncpasswd for Windows


I asked about this over the weekend and didn't get a response at the time
(it
*is* an oddball question).

I'm looking for some info on implementing an equivalent of the Unix
vncpasswd on
Windows.  I can't seem to port the Unix version very easily, even with
substantial changes, probably due to my limited knowledge of C/C++. I'm a
little
curious about the actual algorithm used for the DES3 encryption; I have also
found a *decryption* scheme which works on Windows, but I am having issues
with
un-reversing it and would find it much easier if anyone can point out some
basic
info on how the encryption process is done.
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