|
|
 |
LXII. Mhash Functions
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.
To use it, download the mhash distribution from its web site and follow the included
installation instructions.
You need to compile PHP with the
--with-mhash[=DIR] parameter to enable
this extension. DIR is the mhash install directory.
由于这些常量是由该扩展模块定义的，因此只有在该扩展模块被编译到 PHP 中，或者在运行时被动态加载后，这些常量才有效。
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safely assume that this documentation is outdated.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_MD5
MHASH_SHA1
MHASH_HAVAL256
MHASH_HAVAL192
MHASH_HAVAL160
MHASH_HAVAL128
MHASH_RIPEMD160
MHASH_GOST
MHASH_TIGER
MHASH_CRC32
MHASH_CRC32B
例子 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 |
|
01-Aug-2001 10:13
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,...
| |
memcache_debug
