authen::passphrase::nthash(3pm) [debian man page]
Authen::Passphrase::NTHash(3pm) User Contributed Perl Documentation Authen::Passphrase::NTHash(3pm) NAME
Authen::Passphrase::NTHash - passphrases using the NT-Hash algorithm SYNOPSIS
use Authen::Passphrase::NTHash; $ppr = Authen::Passphrase::NTHash->new( hash_hex => "7f8fe03093cc84b267b109625f6bbf4b"); $ppr = Authen::Passphrase::NTHash->new( passphrase => "passphrase"); $ppr = Authen::Passphrase::NTHash->from_crypt( '$3$$7f8fe03093cc84b267b109625f6bbf4b'); $ppr = Authen::Passphrase::NTHash->from_rfc2307( '{MSNT}7f8fe03093cc84b267b109625f6bbf4b'); $hash = $ppr->hash; $hash_hex = $ppr->hash_hex; if($ppr->match($passphrase)) { ... $passwd = $ppr->as_crypt; $userPassword = $ppr->as_rfc2307; DESCRIPTION
An object of this class encapsulates a passphrase hashed using the NT-Hash function. This is a subclass of Authen::Passphrase, and this document assumes that the reader is familiar with the documentation for that class. The NT-Hash scheme is based on the MD4 digest algorithm. Up to 128 characters of passphrase (characters beyond the 128th are ignored) are represented in Unicode, and hashed using MD4. No salt is used. Warning: MD4 is a weak hash algorithm by current standards, and the lack of salt is a design flaw in this scheme. Use this for compatibility only, not by choice. CONSTRUCTORS
Authen::Passphrase::NTHash->new(ATTR => VALUE, ...) Generates a new passphrase recogniser object using the NT-Hash algorithm. The following attributes may be given: hash The hash, as a string of 16 bytes. hash_hex The hash, as a string of 32 hexadecimal digits. passphrase A passphrase that will be accepted. Either the hash or the passphrase must be given. Authen::Passphrase::NTHash->from_crypt(PASSWD) Generates a new NT-Hash passphrase recogniser object from a crypt string. Two forms are accepted. In the first form, the he crypt string must consist of "$3$$" (note the extra "$") followed by the hash in lowercase hexadecimal. In the second form, the he crypt string must consist of "$NT$" followed by the hash in lowercase hexadecimal. Authen::Passphrase::NTHash->from_rfc2307(USERPASSWORD) Generates a new NT-Hash passphrase recogniser object from an RFC 2307 string. Two forms are accepted. In the first form, the string must consist of "{MSNT}" followed by the hash in hexadecimal; case is ignored. In the second form, the string must consist of "{CRYPT}" (case insensitive) followed by an acceptable crypt string. METHODS
$ppr->hash Returns the hash value, as a string of 16 bytes. $ppr->hash_hex Returns the hash value, as a string of 32 hexadecimal digits. $ppr->match(PASSPHRASE) $ppr->as_crypt $ppr->as_rfc2307 These methods are part of the standard Authen::Passphrase interface. SEE ALSO
Authen::Passphrase, Digest::MD4 AUTHOR
Andrew Main (Zefram) <zefram@fysh.org> COPYRIGHT
Copyright (C) 2006, 2007, 2009, 2010, 2012 Andrew Main (Zefram) <zefram@fysh.org> LICENSE
This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.14.2 2012-02-07 Authen::Passphrase::NTHash(3pm)
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Authen::Passphrase::LANManagerHalf(3pm) User Contributed Perl Documentation Authen::Passphrase::LANManagerHalf(3pm) NAME
Authen::Passphrase::LANManagerHalf - passphrases using half the LAN Manager algorithm SYNOPSIS
use Authen::Passphrase::LANManagerHalf; $ppr = Authen::Passphrase::LANManagerHalf->new( hash_hex => "855c3697d9979e78"); $ppr = Authen::Passphrase::LANManagerHalf->new( passphrase => "passphr"); $ppr = Authen::Passphrase::LANManagerHalf->from_crypt( '$LM$855c3697d9979e78'); $ppr = Authen::Passphrase::LANManagerHalf->from_rfc2307( '{CRYPT}$LM$855c3697d9979e78'); $hash = $ppr->hash; $hash_hex = $ppr->hash_hex; if($ppr->match($passphrase)) { ... $passwd = $ppr->as_crypt; $userPassword = $ppr->as_rfc2307; DESCRIPTION
An object of this class encapsulates half of a passphrase hashed using the Microsoft LAN Manager hash function. This is a subclass of Authen::Passphrase, and this document assumes that the reader is familiar with the documentation for that class. For the complete LAN Manager hash function, see Authen::Passphrase::LANManager. In a spectacularly bad design decision, the Microsoft LAN Manager hash function splits the passphrase into two parts and hashes them separately. It is therefore possible to separate the halves of a LAN Manager hash, and do things with them (such as crack them) separately. This class is about using such a hash half on its own. The half hash algorithm can be used on up to seven Latin-1 characters of passphrase. First the passphrase is folded to uppercase, and zero-padded to seven bytes. Then the seven bytes are used as a 56-bit DES key, to encrypt the fixed plaintext block "KGS!@#$%". The eight byte ciphertext block is the half hash. There is no salt. Warning: Don't even think about using this seriously. It's an exceptionally weak design, flawed in pretty much every respect. CONSTRUCTORS
Authen::Passphrase::LANManagerHalf->new(ATTR => VALUE, ...) Generates a new passphrase recogniser object using the LAN Manager half hash algorithm. The following attributes may be given: hash The hash, as a string of 8 bytes. hash_hex The hash, as a string of 16 hexadecimal digits. passphrase A passphrase that will be accepted. Either the hash or the passphrase must be given. Authen::Passphrase::LANManagerHalf->from_crypt(PASSWD) Generates a new LAN Manager half passphrase recogniser object from a crypt string. The crypt string must consist of "$LM$" followed by the hash in lowercase hexadecimal. Authen::Passphrase::LANManagerHalf->from_rfc2307(USERPASSWORD) Generates a new LAN Manager half passphrase recogniser object from an RFC 2307 string. The string must consist of "{CRYPT}" (case insensitive) followed by an acceptable crypt string. METHODS
$ppr->hash Returns the hash value, as a string of 8 bytes. $ppr->hash_hex Returns the hash value, as a string of 16 hexadecimal digits. $ppr->match(PASSPHRASE) $ppr->as_crypt $ppr->as_rfc2307 These methods are part of the standard Authen::Passphrase interface. SEE ALSO
Authen::Passphrase, Authen::Passphrase::LANManager, Crypt::DES AUTHOR
Andrew Main (Zefram) <zefram@fysh.org> COPYRIGHT
Copyright (C) 2006, 2007, 2009, 2010, 2012 Andrew Main (Zefram) <zefram@fysh.org> LICENSE
This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.14.2 2012-02-07 Authen::Passphrase::LANManagerHalf(3pm)