Blowfish.php

<?
	
	/*
	 * How to Use
	 * 
	 * Supply a message to encrypt, optionally supply a salt as well, otherwise a random one will be created
	 * Salt MUST be 22 characters to work reliably
	 * You will receive an array with $arr['salt'] being the salt and $arr['digest'] being the encrypted result
	*/
	
	// Generates a random salt and encrypts a string with Blowfish using specified number of rounds
    function crypt_blowfish($message, $salt = "none") {
		// Must be TWO digits between 04-31
		$rounds = "09";
		
		if ($salt == "none")
			$salt = bin2hex(openssl_random_pseudo_bytes(11));
		
		// Remove null characters from message
		$message = str_replace("\x00", "", $message)
		
		$crypted = crypt($message, '$2a$'.$rounds.'$'.$salt.'$');
		
		$toReturn = array();
		
		$toReturn['salt'] = $salt;
		$toReturn['digest'] = substr($crypted, 28);
		
		return $toReturn;
    }
	
?>