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