Question

I have chosen an algorithm to encrypt a file. i may encrypt text or image files. How can I write a generic type of encryption method that works with both text and image files? I’m working with Objective-C.

Answer 1

What ever you are encrypting you might be using the data or specifically NSData, then converting it to char array and then applying the algorithm. So make a method that takes NSData as an argument, and return encrypted NSData.

e.g.

-(NSData*)encrypt:(NSData*)data{
  ///your algorithm

  return enCryptedData;
}

Convert your Image or File into NSData and pass it to the method.