Hash Funções

Índice

  • hash — Gera um valor hash (resumo da mensagem)
  • hash_algos — Retorna uma lista de algoritmos de hash registrados
  • hash_copy — Copia contexto de hash
  • hash_equals — Comparação de strings segura para ataque de temporização
  • hash_file — Gera um valor hash usando o conteúdo de um arquivo fornecido
  • hash_final — Finaliza um hash incremental e retorna o resumo resultante
  • hash_hkdf — Gera uma derivação de chave HKDF de uma entrada de chave fornecida
  • hash_hmac — Gera um valor de hash com chave usando o método HMAC
  • hash_hmac_algos — Retorna uma lista de algoritmos de hash registrados adequados para hash_hmac
  • hash_hmac_file — Gera um valor hash com chave usando o método HMAC e o conteúdo de um arquivo fornecido
  • hash_init — Inicializa um contexto de hash incremental
  • hash_pbkdf2 — Gera uma derivação de chave PBKDF2 de uma senha fornecida
  • hash_update — Injeta dados em um contexto de hash ativo
  • hash_update_file — Injeta dados em um contexto de hash ativo a partir de um arquivo
  • hash_update_stream — Injeta dados em um contexto de hash ativo a partir de um fluxo
adicione uma nota

Notas Enviadas por Usuários (em inglês) 4 notes

up
6
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?
up
5
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.
up
-4
kungla at gmail dot com
15 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
up
-5
ocarter at mirabeau dot nl
15 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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