crypt(3c) [osx man page]
crypt(n) crypt(n) __________________________________________________________________________________________________________________________________________________ NAME
crypt - Password hashing based on "crypt" SYNOPSIS
package require Tcl ?8.2? package require Trf ?2.1.4? crypt password salt _________________________________________________________________ DESCRIPTION
The command crypt is an interface to the crypt(3) function for the encryption of passwords. An alternative command for the same, but based on md5 is md5crypt. crypt password salt Encrypts the password using the specified salt and returns the generated hash value as the result of the command. SEE ALSO
md5crypt, trf-intro KEYWORDS
authentication, crypt, hash, hashing, mac, md5, message digest, password COPYRIGHT
Copyright (c) 1996-2003, Andreas Kupries <andreas_kupries@users.sourceforge.net> Trf transformer commands 2.1.4 crypt(n)
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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 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)