AES-256 加密代码,PHP代码库,德仔网

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【PHP】 AES-256 加密

作者:DDIAN / 发布于2015/5/19/ 643


	class aes {
	
	 static public $mode = MCRYPT_MODE_NOFB;
	
	 static public function generateKey($length=32) {
	 if (!in_array($length,array(16,24,32)))
	 return False;
	
	 $str = '';
	 for ($i=0;$i<$length;$i++) {
	 $str .= chr(rand(33,126));
	 }
	
	 return $str;
	 }
	
	 static public function encrypt($data, $key) {
	
	 if (strlen($key) > 32 || !$key)
	 return trigger_error('key too large or key is empty.', E_USER_WARNING) && False;
	
	 $ivSize = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, self::$mode);
	 $iv = mcrypt_create_iv($ivSize, (substr(PHP_OS,0,1) == 'W' ? MCRYPT_RAND : MCRYPT_DEV_URANDOM ));
	 $encryptedData = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $data, self::$mode, $iv);
	 $encryptedData = $iv . $encryptedData;
	
	 return base64_encode($encryptedData);
	 }
	
	 static public function decrypt($data, $key) {
	
	 if (strlen($key) > 32 || !$key)
	 return trigger_error('key too large or key is empty.', E_USER_WARNING) && False;
	
	 $data = base64_decode($data);
	 if (!$data)
	 return False;
	
	 $ivSize = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, self::$mode);
	 $iv = substr($data, 0, $ivSize);
	
	 $data = substr($data, $ivSize);
	
	 $decryptData = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, $data, self::$mode, $iv);
	
	 return $decryptData;
	 }
	}

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　AES-256　　加密　

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