Quote Originally Posted by homoon View Post
I don't know the data type of "rsa"
Well, it is type "pointer to RSA". I don't know what type RSA is however. It is either something you defined, or something from a third party library that you are using. If it's from a library, you need to look up the documentation for that library.

What do you need input_string for if you're going to generate a key anyway?