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LEARN ABOUT SUSE

md5crypt

md5crypt(n)						   MD5-based password encryption					       md5crypt(n)

__________________________________________________________________________________________________________________________________________________

NAME

       md5crypt - MD5-based password encryption

SYNOPSIS

       package require Tcl  8.2

       package require md5  2.0

       package require md5crypt  ?1.1.0?

       ::md5crypt::md5crypt password salt

       ::md5crypt::aprcrypt password salt

       ::md5crypt::salt ?length?

_________________________________________________________________

DESCRIPTION

       This  package  provides	an implementation of the MD5-crypt password encryption algorithm as pioneered by FreeBSD and currently in use as a
       replacement for the unix crypt(3) function in many modern systems. An implementation of the closely related Apache MD5-crypt is also avail-
       able.  The output of these commands are compatible with the BSD and OpenSSL implementation of md5crypt and the Apache 2 htpasswd program.

COMMANDS

       ::md5crypt::md5crypt password salt
	      Generate a BSD compatible md5-encoded password hash from the plaintext password and a random salt (see SALT).

       ::md5crypt::aprcrypt password salt
	      Generate an Apache compatible md5-encoded password hash from the plaintext password and a random salt (see SALT).

       ::md5crypt::salt ?length?
	      Generate a random salt string suitable for use with the md5crypt and aprcrypt commands.

SALT

       The salt passed to either of the encryption schemes implemented here is checked to see if it begins with the encryption scheme magic string
       (either "$1$" for MD5-crypt or "$apr1$" for Apache crypt). If so, this is removed. The remaining characters up to the next $ and  up  to  a
       maximum	of  8  characters  are then used as the salt. The salt text should probably be restricted the set of ASCII alphanumeric characters
       plus "./" (dot and forward-slash) - this is to preserve maximum compatability with the unix password file format.

       If a password is being generated rather than checked from a password file then the salt command may be used to generate a random salt.

EXAMPLES

       % md5crypt::md5crypt password 01234567
       $1$01234567$b5lh2mHyD2PdJjFfALlEz1

       % md5crypt::aprcrypt password 01234567
       $apr1$01234567$IXBaQywhAhc0d75ZbaSDp/

       % md5crypt::md5crypt password [md5crypt::salt]
       $1$dFmvyRmO$T.V3OmzqeEf3hqJp2WFcb.

BUGS, IDEAS, FEEDBACK
       This document, and the package it describes, will undoubtedly contain bugs and other problems.  Please report such in the category md5crypt
       of the Tcllib SF Trackers [http://sourceforge.net/tracker/?group_id=12883].  Please also report any ideas for enhancements you may have for
       either package and/or documentation.

SEE ALSO

       md5

KEYWORDS

       hashing, md5, md5crypt, message-digest, security

COPYRIGHT

       Copyright (c) 2003, Pat Thoyts <patthoyts@users.sourceforge.net>

md5crypt							       1.1.0							       md5crypt(n)