chacha20x

chacha20x.go

package main

import (
	"fmt"
	"golang.org/x/crypto/chacha20poly1305"
	"log"
)

func main() {
	key := []byte("D403842636B7D8E66FE5FB4E7BE6973A")
	aead, err := chacha20poly1305.NewX(key)
	if err != nil {
		log.Fatalln("Failed to instantiate XChaCha20-Poly1305:", err)
	}

	for _, msg := range []string{
		"test msg",
		"The eagle has landed.",
		"Gophers, gophers, gophers everywhere!",
	} {
		
		// Encryption.
		nonce := key[5 : chacha20poly1305.NonceSizeX+5]

		ciphertext := aead.Seal(nil, nonce, []byte(msg), nil)

		// Decryption.
		plaintext, err := aead.Open(nil, nonce, ciphertext, nil)
		if err != nil {
			log.Fatalln("Failed to decrypt or authenticate message:", err)
		}

		fmt.Printf("%s\n", plaintext)
	}

}