md5crypt(3tcl) 1.0.0 md5crypt "MD5-based password encryption"

NAME

md5crypt - MD5-based password encryption

    TABLE OF CONTENTS
    SYNOPSIS
    DESCRIPTION
    COMMANDS
    SALT
    EXAMPLES
    BUGS, IDEAS, FEEDBACK
    SEE ALSO
    KEYWORDS
    COPYRIGHT

SYNOPSIS

package require Tcl 8.2
package require md5 2.0
package require md5crypt ?1.0.0?

::md5crypt::md5crypt password salt

::md5crypt::aprcrypt password salt

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 available. 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).

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.

EXAMPLES

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

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

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. Please also report any ideas for enhancements you may have for either package and/or documentation.

KEYWORDS

hashing, md5, md5crypt, message-digest, security