Extension provides native implementations of common message digest algorithms
using a generic factory method.
At the moment it supports the following hashing algorithms:

 * md2, md4, md5
 * sha1, sha256, sha384, sha512
 * ripemd128, ripemd160
 * tiger128, tiger160, tiger192 (3 and 4 passes)
 * haval128, haval160, haval192, haval224, haval256 (3, 4 and 5 passes)
 * crc32, crc32b, adler32, gost, snefru, whirlpool

WWW: http://pecl.php.net/package/hash