finder39

extension String {
  func md5() -> String! {
    let str = self.cStringUsingEncoding(NSUTF8StringEncoding)
    let strLen = CUnsignedInt(self.lengthOfBytesUsingEncoding(NSUTF8StringEncoding))
    let digestLen = Int(CC_MD5_DIGEST_LENGTH)
    let result = UnsafeMutablePointer<CUnsignedChar>.alloc(digestLen)
    
    CC_MD5(str!, strLen, result)
    
    var hash = NSMutableString()