Question

How to XOR byte arrays in Go

Answer 1

package main

import (
	"fmt"
)

type T [5]byte

func main() {
	var a, b T
	copy(a[:], "Aeryn")
	copy(b[:], "Albus")

	var c T
	for i := range a {
		c[i] = a[i] ^ b[i]
	}

	fmt.Printf("a: %08b\n", a)
	fmt.Printf("b: %08b\n", b)
	fmt.Printf("c: %08b\n", c)
	fmt.Println("c:", c)
	fmt.Printf("c as string: %q\n", string(c[:]))
}



/*
run:

a: [01000001 01100101 01110010 01111001 01101110]
b: [01000001 01101100 01100010 01110101 01110011]
c: [00000000 00001001 00010000 00001100 00011101]
c: [0 9 16 12 29]
c as string: "\x00\t\x10\f\x1d"

*/

 

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Answer 2

package main

import (
	"fmt"
)

func main() {
	a, b := []byte("Aeryn"), []byte("Albus")

	c := make([]byte, len(a))
	for i := range a {
		c[i] = a[i] ^ b[i]
	}

    fmt.Printf("a: %08b\n", a)
    fmt.Printf("b: %08b\n", b)
    fmt.Printf("c: %08b\n", c)
    fmt.Println("c:", c)
    fmt.Printf("c as string: %q\n", string(c[:]))
}



/*
run:

a: [01000001 01100101 01110010 01111001 01101110]
b: [01000001 01101100 01100010 01110101 01110011]
c: [00000000 00001001 00010000 00001100 00011101]
c: [0 9 16 12 29]
c as string: "\x00\t\x10\f\x1d"

*/

 

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