Pure-PHP implementations of keyed-hash message authentication codes (HMACs) and various cryptographic hashing functions.
Uses hash() or mhash() if available and an internal implementation, otherwise. Currently supports the following:
md2, md5, md5-96, sha1, sha1-96, sha256, sha384, and sha512
If {@link Crypt_Hash::setKey() setKey()} is called, {@link Crypt_Hash::hash() hash()} will return the HMAC as opposed to
the hash. If no valid algorithm is provided, sha1 will be used.
PHP versions 4 and 5
{@internal The variable names are the same as those in
{@link http://tools.ietf.org/html/rfc2104#section-2 RFC2104}.}}
Here's a short example of how to use this library:
setKey('abcdefg');
echo base64_encode($hash->hash('abcdefg'));
?>
LICENSE: Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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The above copyright notice and this permission notice shall be included in
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THE SOFTWARE.
Constants
CRYPT_HASH_MODE_INTERNAL
= 1
Toggles the internal implementation
CRYPT_HASH_MODE_MHASH
= 2
Toggles the mhash() implementation, which has been deprecated on PHP 5.3.0+.
CRYPT_HASH_MODE_HASH
= 3
Toggles the hash() implementation, which works on PHP 5.1.2+.
Add _sha256() adds multiple unsigned 32-bit integers. Since PHP doesn't support unsigned integers and since the
possibility of overflow exists, care has to be taken. Math_BigInteger() could be used but this should be faster.
Return value
Type
Description
String
Tags
Name
Description
see
access
private
_md2(
$m,
)
:
n/a
Description
Pure-PHP implementation of MD2 See {@link http://tools.ietf.org/html/rfc1319 RFC1319}.
Pure-PHP implementation of SHA256 See {@link http://en.wikipedia.org/wiki/SHA_hash_functions#SHA-256_.28a_SHA-2_variant.29_pseudocode SHA-256 (a SHA-2 variant) pseudocode - Wikipedia}.