Hash Funzioni

Indice dei contenuti

hash — Generate a hash value (message digest)
hash_algos — Return a list of registered hashing algorithms
hash_copy — Copy hashing context
hash_equals — Timing attack safe string comparison
hash_file — Generate a hash value using the contents of a given file
hash_final — Finalize an incremental hash and return resulting digest
hash_hkdf — Generate a HKDF key derivation of a supplied key input
hash_hmac — Generate a keyed hash value using the HMAC method
hash_hmac_algos — Return a list of registered hashing algorithms suitable for hash_hmac
hash_hmac_file — Generate a keyed hash value using the HMAC method and the contents of a given file
hash_init — Initialize an incremental hashing context
hash_pbkdf2 — Generate a PBKDF2 key derivation of a supplied password
hash_update — Pump data into an active hashing context
hash_update_file — Pump data into an active hashing context from a file
hash_update_stream — Pump data into an active hashing context from an open stream

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User Contributed Notes 4 notes

down

artem at it-nt dot ru ¶

16 years ago

And some code for LM hash:

<?php
function LMhash($string)
{
    $string = strtoupper(substr($string,0,14));

    $p1 = LMhash_DESencrypt(substr($string, 0, 7));
    $p2 = LMhash_DESencrypt(substr($string, 7, 7));

    return strtoupper($p1.$p2);
}

function LMhash_DESencrypt($string)
{
    $key = array();
    $tmp = array();
    $len = strlen($string);

    for ($i=0; $i<7; ++$i)
        $tmp[] = $i < $len ? ord($string[$i]) : 0;

    $key[] = $tmp[0] & 254;
    $key[] = ($tmp[0] << 7) | ($tmp[1] >> 1);
    $key[] = ($tmp[1] << 6) | ($tmp[2] >> 2);
    $key[] = ($tmp[2] << 5) | ($tmp[3] >> 3);
    $key[] = ($tmp[3] << 4) | ($tmp[4] >> 4);
    $key[] = ($tmp[4] << 3) | ($tmp[5] >> 5);
    $key[] = ($tmp[5] << 2) | ($tmp[6] >> 6);
    $key[] = $tmp[6] << 1;
   
    $is = mcrypt_get_iv_size(MCRYPT_DES, MCRYPT_MODE_ECB);
    $iv = mcrypt_create_iv($is, MCRYPT_RAND);
    $key0 = "";
   
    foreach ($key as $k)
        $key0 .= chr($k);
    $crypt = mcrypt_encrypt(MCRYPT_DES, $key0, "KGS!@#$%", MCRYPT_MODE_ECB, $iv);

    return bin2hex($crypt);
}
?>

Some optimization?

down

CraquePipe ¶

16 years ago

For thoes of you who're looking to generate an NTLM hash (not an LM hash), I found out it's quite simple..

It uses the basic MD4 function, but the password needs to be in Unicode Little Endian encode first (this canbe achieved by the iconv function).

This can be done easily by using the following code:

<?php
function NTLMHash($Input) {
  // Convert the password from UTF8 to UTF16 (little endian)
  $Input=iconv('UTF-8','UTF-16LE',$Input);

  // Encrypt it with the MD4 hash
  $MD4Hash=bin2hex(mhash(MHASH_MD4,$Input));

  // You could use this instead, but mhash works on PHP 4 and 5 or above
  // The hash function only works on 5 or above
  //$MD4Hash=hash('md4',$Input);

  // Make it uppercase, not necessary, but it's common to do so with NTLM hashes
  $NTLMHash=strtoupper($MD4Hash);

  // Return the result
  return($NTLMHash);
}
?>

To produce an LM hash requires a fully-written script containing the algorithm used to make it.

Enjoy,
CraquePipe.

down

-4

kungla at gmail dot com ¶

14 years ago

For Samba ueserPassword you can use:



(I am not very sure aboute the salt part, but it works for me like that)



<?php

function CRYPThash($string, $salt = null)

{

    if (!$salt)

        $salt = rand(10,99);

    

    return "{CRYPT}".crypt($string, $salt);

}

?>



In posted NTLMHash function you can also use:



<?php

// Encrypt it with the MD4 hash

$MD4Hash=hash('md4',$Input);

?>



So you don't need to install mhash libraries

down

-5

ocarter at mirabeau dot nl ¶

14 years ago

Note for FreeBSD with PHP-5. 

This is disabled by default; use the security/php5-hash port:
cd /usr/ports/security/php5-hash ; make install clean
(do not use the security/pecl-hash port as in the past, see the /usr/ports/UPDATING post from 20081211)

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