import Foundation

extension Int

{

    func hexedString() -> String

    {

        return NSString(format:"%02x", self) as String

    }

}

extension NSData

{

    func hexedString() -> String

    {

        var string = String()

        let unsafePointer = bytes.assumingMemoryBound(to: UInt8.self)

        for i in UnsafeBufferPointer<UInt8>(start:unsafePointer, count: length)

        {

            string += Int(i).hexedString()

        }

        return string

    }

    func MD5() -> NSData

    {

        let result = NSMutableData(length: Int(CC_MD5_DIGEST_LENGTH))!

        let unsafePointer = result.mutableBytes.assumingMemoryBound(to: UInt8.self)

        CC_MD5(bytes, CC_LONG(length), UnsafeMutablePointer<UInt8>(unsafePointer))

        return NSData(data: result as Data)

    }

}

extension String

{

    func MD5() -> String

    {

        let data = (self as NSString).data(using: String.Encoding.utf8.rawValue)! as NSData

        return data.MD5().hexedString()

    }

}