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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 maxi-
       mum  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 compatabil-
       ity 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://source-
       forge.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

CATEGORY
       Hashes, checksums, and encryption

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

md5crypt			     1.1.0			   md5crypt(n)

NAME | SYNOPSIS | DESCRIPTION | COMMANDS | SALT | EXAMPLES | BUGS, IDEAS, FEEDBACK | SEE ALSO | KEYWORDS | CATEGORY | COPYRIGHT

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