34 lines
865 B
Swift
34 lines
865 B
Swift
//
|
||
// XOREncryption.swift
|
||
// XOREncryption
|
||
//
|
||
// Created by Denis Simon on 2019-01-08.
|
||
//
|
||
|
||
import Foundation
|
||
|
||
extension Character {
|
||
func utf8() -> UInt8 {
|
||
let utf8 = String(self).utf8
|
||
return utf8[utf8.startIndex]
|
||
}
|
||
}
|
||
|
||
func encryptDecrypt(_ input: String) -> String {
|
||
let key = "KCQ".characters.map { $0 } //Can be any chars, and any length array
|
||
let length = key.count
|
||
var output = ""
|
||
|
||
for i in input.characters.enumerated() {
|
||
let byte = [i.element.utf8() ^ key[i.offset % length].utf8()]
|
||
output.append(String(bytes: byte, encoding: .utf8)!)
|
||
}
|
||
|
||
return output
|
||
}
|
||
|
||
let encrypted = encryptDecrypt("Hello, World!")
|
||
print("Encrypted: \(encrypted)") // output: Encrypted: &=',}k>9/5j
|
||
let decrypted = encryptDecrypt(encrypted)
|
||
print("Decrypted: \(decrypted)") // output: Decrypted: Hello, World!
|