1Authen::Passphrase::NTHUassehr(3C)ontributed Perl DocumeAnuttahteino:n:Passphrase::NTHash(3)
2
3
4

NAME

6       Authen::Passphrase::NTHash - passphrases using the NT-Hash algorithm
7

SYNOPSIS

9               use Authen::Passphrase::NTHash;
10
11               $ppr = Authen::Passphrase::NTHash->new(
12                       hash_hex => "7f8fe03093cc84b267b109625f6bbf4b");
13
14               $ppr = Authen::Passphrase::NTHash->new(
15                       passphrase => "passphrase");
16
17               $ppr = Authen::Passphrase::NTHash->from_crypt(
18                       '$3$$7f8fe03093cc84b267b109625f6bbf4b');
19
20               $ppr = Authen::Passphrase::NTHash->from_rfc2307(
21                       '{MSNT}7f8fe03093cc84b267b109625f6bbf4b');
22
23               $hash = $ppr->hash;
24               $hash_hex = $ppr->hash_hex;
25
26               if($ppr->match($passphrase)) { ...
27
28               $passwd = $ppr->as_crypt;
29               $userPassword = $ppr->as_rfc2307;
30

DESCRIPTION

32       An object of this class encapsulates a passphrase hashed using the NT-
33       Hash function.  This is a subclass of Authen::Passphrase, and this
34       document assumes that the reader is familiar with the documentation for
35       that class.
36
37       The NT-Hash scheme is based on the MD4 digest algorithm.  Up to 128
38       characters of passphrase (characters beyond the 128th are ignored) are
39       represented in Unicode, and hashed using MD4.  No salt is used.
40
41       Warning: MD4 is a weak hash algorithm by current standards, and the
42       lack of salt is a design flaw in this scheme.  Use this for
43       compatibility only, not by choice.
44

CONSTRUCTORS

46       Authen::Passphrase::NTHash->new(ATTR => VALUE, ...)
47           Generates a new passphrase recogniser object using the NT-Hash
48           algorithm.  The following attributes may be given:
49
50           hash
51               The hash, as a string of 16 bytes.
52
53           hash_hex
54               The hash, as a string of 32 hexadecimal digits.
55
56           passphrase
57               A passphrase that will be accepted.
58
59           Either the hash or the passphrase must be given.
60
61       Authen::Passphrase::NTHash->from_crypt(PASSWD)
62           Generates a new NT-Hash passphrase recogniser object from a crypt
63           string.  Two forms are accepted.  In the first form, the he crypt
64           string must consist of "$3$$" (note the extra "$") followed by the
65           hash in lowercase hexadecimal.  In the second form, the he crypt
66           string must consist of "$NT$" followed by the hash in lowercase
67           hexadecimal.
68
69       Authen::Passphrase::NTHash->from_rfc2307(USERPASSWORD)
70           Generates a new NT-Hash passphrase recogniser object from an RFC
71           2307 string.  Two forms are accepted.  In the first form, the
72           string must consist of "{MSNT}" followed by the hash in
73           hexadecimal; case is ignored.  In the second form, the string must
74           consist of "{CRYPT}" (case insensitive) followed by an acceptable
75           crypt string.
76

METHODS

78       $ppr->hash
79           Returns the hash value, as a string of 16 bytes.
80
81       $ppr->hash_hex
82           Returns the hash value, as a string of 32 hexadecimal digits.
83
84       $ppr->match(PASSPHRASE)
85       $ppr->as_crypt
86       $ppr->as_rfc2307
87           These methods are part of the standard Authen::Passphrase
88           interface.
89

SEE ALSO

91       Authen::Passphrase, Digest::MD4
92

AUTHOR

94       Andrew Main (Zefram) <zefram@fysh.org>
95

97       Copyright (C) 2006, 2007, 2009, 2010, 2012 Andrew Main (Zefram)
98       <zefram@fysh.org>
99

LICENSE

101       This module is free software; you can redistribute it and/or modify it
102       under the same terms as Perl itself.
103
104
105
106perl v5.36.0                      2023-01-20     Authen::Passphrase::NTHash(3)
Impressum