RSA Encrypt & Decrypt library

lib.rsa.php

<?php
	/**
	 * RSA Encrypt & Decrypt library
	 * 
	 * Original algorithm is orginated by Ron Rivest, Adi Shamir and Leonard Adleman.
	 * Produce PHP Code by Hx0A5F.
	 **/	
	
	class RSA {
		private $publicKey = 0;
		private $privateKey = 0;
		private $duplexKey = 0;
		
		public function __construct($_securityClass = 5) {
			if($_securityClass > 5) {
				$_securityClass = 5;
			} else if($_securityClass < 1) {
				$_securityClass = 1;
			}
			
			$_securityClass *= rand(2, 7);
			$_primeA = $this->getPrime(rand(4 * $_securityClass, 28), rand(16 * $_securityClass, 112));
			$_primeB = $this->getPrime(rand(4 * $_securityClass, 28), rand(16 * $_securityClass, 112));
			
			$this->duplexKey = $_primeA * $_primeB;
			$_eulerPhi = ($_primeA - 1) * ($_primeB - 1);
			$_eulerPhi = ($_primeA - 1) * ($_primeB - 1);
			
			for($_Loop = 2; $_Loop < $this->duplexKey; $_Loop++) {
				$_epDivs = $this->getDivisor($_eulerPhi);
				$_loopDivs = $this->getDivisor($_Loop);
				if($_eulerPhi % $_Loop == 0) {
					$this->privateKey = $_Loop;
				}
			}
			echo "\r\n<" . '[' . $_eulerPhi . ']{' . $_primeA . '/' . $_primeB . '}';
			for($_Loop = 1; $_Loop < $_eulerPhi; $_Loop++) {
				if(($this->privateKey * $_Loop) % $_eulerPhi == 1) {
					$this->publicKey = $_Loop;
				}
			} echo ">\r\n\r\n";
		}
		
		public function Machine($_targetText, $_duplexKey, $_whateverKey) {
			return pow($_targetText, $_whateverKey) % $_duplexKey;
		}
		
		private function getDivisor($_Number) {
			$_Divisors = array();
			
			for($_Loop = 1; $_Loop <= $_Number; $_Loop++) {
				if(($_Number % $_Loop) == 0) {
					$_Divisors[] = $_Loop;
				}
			}
			
			return $_Divisors;
		}
		
		private function getPrime($_minNum, $_maxNum) {
			if($_minNum != 2) { echo '<' . $_minNum . ' ' . $_maxNum . '>';
				$_Primes = $this->getPrime(2, $_maxNum);
				$_primesCount = count($_Primes);
				
				for($_Loop = 0; $_Loop < $_primesCount; $_Loop++) {
					if($_Primes[$_Loop] < $_minNum) {
						array_shift($_Primes);
					}
				}
				echo " (("; print_r($_Primes); echo "))\r\n\r\n";
				return $_Primes[rand(0, count($_Primes) - 1)];
			} else {
				$_Primes = range($_minNum, $_maxNum);
				
				for($_Loop = 2; $_Loop < $_maxNum; $_Loop++) {
					$_primesCount = count($_Primes);
					
					for($_subLoop = 0; $_subLoop < $_primesCount; $_subLoop++) {
						if($_Loop != $_Primes[$_subLoop] && $_Primes[$_subLoop] % $_Loop == 0) {
							unset($_Primes[$_subLoop]);
						}
					}
					
					sort($_Primes);
				}
				
				return $_Primes;
			}
		}
		
		public function getPublic() {
			return $this->publicKey;
		}
		
		public function getPrivate() {
			return $this->privateKey;
		}
		
		public function getDuplex() {
			return $this->duplexKey;
		}
	}
	
	function rsa_encrypt($_targetCode, $_primeA, $_primeB) {
		$_mPrime = $_primeA * $_primeB; // Get multiple value from twin prime number A and B
		$_eulerPhi = ($_primeA - 1) * ($_primeB - 1); // Get 'Euler phi' value from twin prime number A and B
		
		for($_Loop = 2; $_Loop < $_mPrime; $_Loop++) {
			if($_eulerPhi % $_Loop == 0) {
				$_epDiv = $_Loop; // Get greatest divisor value from 'Euler phi'
			}
		}
		
		for($_Loop = 1; $_Loop < $_eulerPhi; $_Loop++) {
			if(($_epDiv * $_Loop) % $_eulerPhi == 1) {
				$_publicKey = $_Loop;
			}
		}
		
		return ($_targetCode ^ $_epDiv) % $_mPrime;
	}
?>