--- /dev/null
+<?php
+/**
+ * A class for arbitrary precision math functions implemented using GMP
+ *
+ * PHP version 5.3
+ *
+ * @category PHPCryptLib
+ * @package Core
+ * @subpackage BigMath
+ * @author Anthony Ferrara <ircmaxell@ircmaxell.com>
+ * @copyright 2011 The Authors
+ * @license http://www.opensource.org/licenses/mit-license.html MIT License
+ * @version Build @@version@@
+ */
+namespace CryptLib\Core\BigMath;
+
+/**
+ * A class for arbitrary precision math functions implemented using GMP
+ *
+ * @category PHPCryptLib
+ * @package Core
+ * @subpackage BigMath
+ */
+class GMP extends \CryptLib\Core\BigMath {
+
+ /**
+ * Add two numbers together
+ *
+ * @param string $left The left argument
+ * @param string $right The right argument
+ *
+ * @return A base-10 string of the sum of the two arguments
+ */
+ public function add($left, $right) {
+ return gmp_strval(gmp_add($left, $right));
+ }
+
+ /**
+ * Subtract two numbers
+ *
+ * @param string $left The left argument
+ * @param string $right The right argument
+ *
+ * @return A base-10 string of the difference of the two arguments
+ */
+ public function subtract($left, $right) {
+ return gmp_strval(gmp_sub($left, $right));
+ }
+
+}
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