1md5crypt(n)              MD5-based password encryption             md5crypt(n)
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NAME

8       md5crypt - MD5-based password encryption
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SYNOPSIS

11       package require Tcl  8.2
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13       package require md5  2.0
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15       package require md5crypt  ?1.0.0?
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17       ::md5crypt::md5crypt password salt
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19       ::md5crypt::aprcrypt password salt
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DESCRIPTION

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

32       ::md5crypt::md5crypt password salt
33              Generate a BSD compatible md5-encoded  password  hash  from  the
34              plaintext password and a random salt (see SALT).
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36       ::md5crypt::aprcrypt password salt
37              Generate an Apache compatible md5-encoded password hash from the
38              plaintext password and a random salt (see SALT).
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SALT

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

51       % md5crypt::md5crypt password 01234567
52       $1$01234567$b5lh2mHyD2PdJjFfALlEz1
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55       % md5crypt::aprcrypt password 01234567
56       $apr1$01234567$IXBaQywhAhc0d75ZbaSDp/
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SEE ALSO

60       md5
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KEYWORDS

63       hashing, md5, md5crypt, message-digest, security
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66       Copyright (c) 2003, Pat Thoyts <patthoyts@users.sourceforge.net>
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71md5crypt                             1.0.0                         md5crypt(n)
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