FOF30\Encrypt\Aes::encryptString PHP Method

    public function encryptString($stringToEncrypt, $base64encoded = true)
    {
        if (strlen($this->keyString) != 32) {
            $key = hash('sha256', $this->keyString, true);
        } else {
            $key = $this->keyString;
        }
        // Set up the IV (Initialization Vector)
        $iv_size = mcrypt_get_iv_size($this->cipherType, $this->cipherMode);
        $iv = mcrypt_create_iv($iv_size, MCRYPT_DEV_URANDOM);
        if (empty($iv)) {
            $iv = mcrypt_create_iv($iv_size, MCRYPT_DEV_RANDOM);
        }
        if (empty($iv)) {
            $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
        }
        // Encrypt the data
        $cipherText = mcrypt_encrypt($this->cipherType, $key, $stringToEncrypt, $this->cipherMode, $iv);
        // Prepend the IV to the ciphertext
        $cipherText = $iv . $cipherText;
        // Optionally pass the result through Base64 encoding
        if ($base64encoded) {
            $cipherText = base64_encode($cipherText);
        }
        // Return the result
        return $cipherText;
    }

 /**
  * @covers FOF30\Encrypt\Aes
  *
  * @return  void
  */
 public function testCryptProcessEcb()
 {
     if (function_exists('mcrypt_module_open')) {
         $this->aes = new Aes('The quick brown fox jumped over the lazy dog', 256, 'ecb');
         // Regular string
         $str = 'THATISINSANE';
         $es = $this->aes->encryptString($str, true);
         $ds = $this->aes->decryptString($es, true);
         $ds = rtrim($ds, "");
         $this->assertNotEquals($str, $es);
         $this->assertEquals($str, $ds);
         // UTF-8 data
         $str = 'Χρησιμοποιώντας μη λατινικούς χαρακτήρες';
         $es = $this->aes->encryptString($str, false);
         $ds = $this->aes->decryptString($es, false);
         $ds = rtrim($ds, "");
         $this->assertNotEquals($str, $es);
         $this->assertEquals($str, $ds);
         // Using an odd sized keystring (using sha256 to convert it to a key)
         $this->aes = new Aes('The quick brown fox jumped over the lazy dog');
         $str = 'This is some very secret stuff that you are not supposed to transmit in clear text';
         $es = $this->aes->encryptString($str, true);
         $ds = $this->aes->decryptString($es, true);
         $ds = rtrim($ds, "");
         $this->assertNotEquals($str, $es);
         $this->assertEquals($str, $ds);
     } else {
         $this->markTestSkipped('mcrypt is not supported on this system');
     }
 }