Hashing

Fluent interface to hashing functions provided by PHP, extended with Murmur3.

Examples

Calculate hash for a string, output using base32:

use text\hash\Hashing;

$hash= Hashing::murmur3_32()->new($seed= 0x2a);
$base32= $hash->digest('The quick brown fox jumps over the lazy dog.')->base32();

Incrementally updating hash, output hex (much like the builtin md5() function does):

use text\hash\Hashing;

$hash= Hashing::md5()->new();
while ($stream->available()) {
  $hash->update($stream->read());
}

$hex= $hash->digest()->hex();

Comparing hashes using constant time comparison:

use text\hash\{Hashing, HashCode};

$computed= Hashing::sha256()->digest($req->param('password')); // From request
$stored= HashCode::fromHex($record['password_hash']);          // From database

if ($computed->equals($stored)) {
  // Not susceptible to timing attacks
}

Algorithms

The following algorithms exist as shortcuts inside the entry point class:

• Hashing::md5()
• Hashing::sha1()
• Hashing::sha256()
• Hashing::sha512()
• Hashing::murmur3_32()
• Hashing::murmur3_128()

Other algorithms can be instantiated via Hashing::algorithm(string $name, var... $args), which may raise an IllegalArgumentException if the given algorithm is not available.