Last updated: Sat, 24 Mar 2007

LIV. hash Functions

Úvod

Message Digest (hash) engine. Allows direct or incremental processing of arbitrary length messages using a variety of hashing algorithms.

Požadavky

The Hash extension requires no external libraries and is enabled by default as of PHP 5.1.2. It may be explicitly disabled by using the --disable-hash switch to configure. Earlier versions of PHP may incorporate the Hash extension by installing the » PECL module.

Typy prostředků

This extension defines a Hashing Context resource returned by hash_init().

Předdefinované konstanty

Tyto konstanty jsou definovány tímto rozšířením a budou k dispozici pouze tehdy, bylo-li rozšíření zkompilováno společně s PHP nebo dynamicky zavedeno za běhu.

HASH_HMAC (integer): Optional flag for hash_init(). Indicates that the HMAC digest-keying algorithm should be applied to the current hashing context.

Obsah

hash_algos — Return a list of registered hashing algorithms
hash_file — Generate a hash value using the contents of a given file
hash_final — Finalize an incremental hash and return resulting digest
hash_hmac_file — Generate a keyed hash value using the HMAC method and the contents of a given file
hash_hmac — Generate a keyed hash value using the HMAC method
hash_init — Initialize an incremental 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
hash_update — Pump data into an active hashing context
hash — Generate a hash value (message digest)

hash_algos

HaruPage::textRect

Last updated: Sat, 24 Mar 2007

add a note User Contributed Notes
hash Functions

CraquePipe
24-Mar-2008 05:42


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.

rbemrose at vgmusic dot com
16-Oct-2007 06:55


martin:  That's because some distributions, such as FreeBSD's ports and Debian's apt split PHP's modules into different packages.

martin
27-Sep-2007 12:28


I tried to use Hash() function on my PHP 5.2.3 (FreeBSD 6.2) but there was no Hash() function. (it should be available by default from version 5.1.2)



Hash() function was working after installing "security/pecl-hash" port.

nb_removethis_ at wtal dot de
03-Sep-2007 05:24


Some tests with mhash and hash revealed on my machine that hash needs more than twice as long to create a hash than mhash. The average of one million cylces of Haval128, Haval256, Gost, CRC32, MD5, SHA1 and SHA256 was 450ms for mhash and 1150ms for hash.

add a note

hash_algos

HaruPage::textRect

Last updated: Sat, 24 Mar 2007