How to Generate and Use Ed25519 Keys in Go

Stdlib
2026-04-17T12:05:42+00:00
Generate Ed25519 keys in Go using crypto/ed25519.GenerateKey and verify signatures with ed25519.Verify.

Use the crypto/ed25519 package to generate a key pair with ed25519.GenerateKey() and sign or verify data using the public key and signature bytes.

package main

import (
	"crypto/ed25519"
	"fmt"
)

func main() {
	// Generate key pair
	public, private, err := ed25519.GenerateKey(nil)
	if err != nil {
		panic(err)
	}

	// Sign a message
	message := []byte("Hello, World!")
	signature := ed25519.Sign(private, message)

	// Verify the signature
	if ed25519.Verify(public, message, signature) {
		fmt.Println("Signature is valid")
	} else {
		fmt.Println("Signature is invalid")
	}
}