[edit] Last updated: Mon, 01 Nov 2010

LXXX. Mhash Functions

Wstęp

These functions are intended to work with mhash. Mhash can be used to create checksums, message digests, message authentication codes, and more.

This is an interface to the mhash library. mhash supports a wide variety of hash algorithms such as MD5, SHA1, GOST, and many others. For a complete list of supported hashes, refer to the documentation of mhash. The general rule is that you can access the hash algorithm from PHP with MHASH_HASHNAME. For example, to access TIGER you use the PHP constant MHASH_TIGER.

Wymagania

To use it, download the mhash distribution from its web site and follow the included installation instructions.

Instalacja

You need to compile PHP with the --with-mhash[=DIR] parameter to enable this extension. DIR is the mhash install directory.

Konfiguracja czasu wykonywania

To rozszerzenie nie definiuje posiada żadnych dyrektyw konfiguracyjnych w pliku php.ini.

Typy zasobów

To rozszerzenie nie posiada żadnych rodzajów zasobów.

Stałe predefinopwane

Poniższe stałe są zdefiniowane w tym rozszerzeniu i stają się dostępne, gdy rozszerzenie jest dokompilowane do PHP, lub załadowane dynamicznie przy starcie.

Here is a list of hashes which are currently supported by mhash. If a hash is not listed here, but is listed by mhash as supported, you can safely assume that this documentation is outdated.

MHASH_ADLER32
MHASH_CRC32
MHASH_CRC32B
MHASH_GOST
MHASH_HAVAL128
MHASH_HAVAL160
MHASH_HAVAL192
MHASH_HAVAL256
MHASH_MD4
MHASH_MD5
MHASH_RIPEMD160
MHASH_SHA1
MHASH_SHA256
MHASH_TIGER
MHASH_TIGER128
MHASH_TIGER160

Przykłady

Przykład 1. Compute the MD5 digest and hmac and print it out as hex


<?php

$input = "what do ya want for nothing?";

$hash = mhash(MHASH_MD5, $input);

echo "The hash is " . bin2hex($hash) . "<br />\n";

$hash = mhash(MHASH_MD5, $input, "Jefe");

echo "The hmac is " . bin2hex($hash) . "<br />\n";

?>

This will produce:

The hash is d03cb659cbf9192dcd066272249f8412 
The hmac is 750c783e6ab0b503eaa86e310a5db738

Spis treści
mhash_count -- Get the highest available hash id
mhash_get_block_size -- Get the block size of the specified hash
mhash_get_hash_name -- Get the name of the specified hash
mhash_keygen_s2k -- Generates a key
mhash -- Compute hash

mhash_count

Memcache::setCompressThreshold

[edit] Last updated: Mon, 01 Nov 2010

add a note User Contributed Notes Mhash Functions

alexey dot kupershtokh at gmail dot com 27-Dec-2007 04:48


There's a class for generating TTH compatible with DC clients (DC++, StrongDC, ...) which uses mhash() with tiger algorithm:

http://kupershtokh.blogspot.com/2007/12/on-phpclub.html

ludicruz at yahoo dot com 07-Jul-2007 01:41


to robert at mediamonks dot com



This will work better, in your function you can just use the constant function to pull in the actual value of MHASH_SHA512 or whatever.



function getHashNotWorking($argStrHashMethod, $argStrString)

{

$strHashMethod = 'MHASH_' . $argStrHashMethod;

$strHashedString = bin2hex(mhash(constant($strHashMethod), $argStrString));



return $strHashedString;

}



now:



echo getHashNotWorking('SHA512', 'some string');



works how you want it.

robert at mediamonks dot com 06-Dec-2006 12:44


function getHashNotWorking($argStrHashMethod, $argStrString)

{

$strHashMethod = 'MHASH_' . $argStrHashMethod;

$strHashedString = bin2hex(mhash($strHashMethod, $argStrString));



return $strHashedString;

}



echo getHashNotWorking('SHA512', 'some string');



This will return an error about the mhash function expecting a long type instead of a string.



=============================



for ($intI = 0; $intI <= mhash_count(); $intI++)

{

$arrHashTypes[mhash_get_hash_name($intI)] = $intI;

}



function getHashWorking($argStrType, $argStrString)

{

global $arrHashTypes;

$strHashedString = bin2hex(mhash($arrHashTypes[$argStrType], $argStrString));



return $strHashedString;

}



echo getHashWorking('SHA512', 'some string');



This will return the hash with the desired hash method

brentdothansenatgmaildotcom 11-Aug-2005 04:43


Since it seems that the tiger hash bug has been labeled "bogus" here is a fix to give a correct result.  I'm not a binary expert so if you come up with a better fix please let us know. Just do your MHASH_TIGER as normal then send the unaltered binary into tigerfix and you get a proper HEX return.



function tigerfix ($binary_hash) {

     $my_split = str_split($binary_hash,8);

     $my_tiger ="";

     foreach($my_split as $key => $value) {

        $my_split[$key] = strrev($value);

        $my_tiger .= $my_split[$key];

     }

    $my_tiger_hex = bin2hex($my_tiger);

    return $my_tiger_hex;

}

m1tk4 at hotmail dot com 21-Jun-2004 10:43


To enable mhash on RHEL/Fedora Core/other RPM-based Linuxes without rebuilding PHP, get the php-mhash and mhash RPMs at http://phprpms.sourceforge.net/mhash

31-Jul-2001 07:13


MHASH_HAVAL256 , MHASH_HAVAL192, etc...


refers to the HAVAL hash with 3 rounds.





To use HAVAL with 4 or 5 rounds, you have to


recompile the mhash library and either add


new hash names, or just change in mhash.c 


the definitions of MHASH_HAVAL256,...

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