10-01-2004
Shadow file encryption method
Hi all,
I'd like to use the encryption method used to generate the /etc/shadow passwords.
The goal is to write a script that get a plain-text password as argument and returns an encrycped one.
Can you help me, please?
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LEARN ABOUT CENTOS
vncpasswd
vncpasswd(1) Virtual Network Computing vncpasswd(1)
NAME
vncpasswd - change the VNC password
SYNOPSIS
vncpasswd [passwd-file]
vncpasswd -f
DESCRIPTION
vncpasswd allows you to set the password used to access VNC desktops. Its default behavior is to prompt for a VNC password and then store
an obfuscated version of this password to passwd-file (or to $HOME/.vnc/passwd if no password file is specified.) The vncserver script
runs vncpasswd the first time you start a VNC desktop, and it invokes Xvnc with the appropriate -rfbauth option. vncviewer can also be
given a password file to use via the -passwd option.
The password must be at least six characters long (unless the -f command-line option is used-- see below), and only the first eight charac-
ters are significant. Note that the stored password is not encrypted securely - anyone who has access to this file can trivially find out
the plain-text password, so vncpasswd always sets appropriate permissions (read and write only by the owner.) However, when accessing a
VNC desktop, a challenge-response mechanism is used over the wire making it hard for anyone to crack the password simply by snooping on the
network.
OPTIONS
-f Filter mode. Read a plain-text password from stdin and write an encrypted version to stdout. Note that in filter mode, short or
even empty passwords will be silently accepted.
FILES
$HOME/.vnc/passwd
Default location of the VNC password file.
SEE ALSO
vncviewer(1), vncserver(1), Xvnc(1) vncconfig(1),
http://www.tigervnc.org
AUTHORS
Tristan Richardson, RealVNC Ltd.
Antoine Martin
D. R. Commander
VNC was originally developed by the RealVNC team while at Olivetti Research Ltd / AT&T Laboratories Cambridge. TightVNC additions were
implemented by Constantin Kaplinsky. Many other people participated in development, testing and support.
TigerVNC 09 Jul 2010 vncpasswd(1)