LXXVI. Mhash Functions

Введение

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.

Требования

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

Установка

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

Настройка во время выполнения

Данное расширение не определяет никакие директивы конфигурации в php.ini.

Типы ресурсов

Данное расширение не определяет никакие типы ресурсов.

Предопределенные константы

Перечисленные ниже константы определены данным расширением и могут быть доступны только в том случае, если PHP был собран с поддержкой этого расширения или же в том случае, если данное расширение подгружается во время выполнения.

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 If a hash is not listed here, but is listed by mhash as supported, you can safely assume that this documentation is outdated.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

Примеры

Пример 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

Содержание
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 Functions

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;

}

Keamos at gmail dot com
26-Mar-2005 05:16


The Tiger implementation in Mhash is broken--



http://pastebin.ca/8272



Cryptopp-PHP passes the test vectors (found at http://tinyurl.com/4g9su) but Mhash appears to not do so--use Cryptopp-PHP for now if you need to use Tiger.

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,...