golang x/crypto/salsa20 example

salsa20_example.go

// https://play.golang.org/p/UPn9o_AMpmr

package main

import (
	"fmt"
	"golang.org/x/crypto/salsa20"
)

var key = [32]byte{}
var nonce = [8]byte{}

func main() {
	in := []byte("abcd")
	out := make([]byte, len(in))
	salsa20.XORKeyStream(out, in, nonce[:], &key)
	fmt.Println(in, out) // [97 98 99 100] [251 245 149 63]
	
	in2 := make([]byte, len(out))
	copy(in2, out)
	out2 := make([]byte, len(in2))
	salsa20.XORKeyStream(out2, in2, nonce[:], &key)
	fmt.Println(in2, out2)	// [251 245 149 63] [97 98 99 100]
}