70 lines
1.4 KiB
Go
70 lines
1.4 KiB
Go
package main
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import (
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"crypto/rand"
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"crypto/sha256"
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"fmt"
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"log"
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secp "p8k.mleku.dev"
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)
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func main() {
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ctx, err := secp.NewContext(secp.ContextSign | secp.ContextVerify)
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if err != nil {
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log.Fatal(err)
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}
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defer ctx.Destroy()
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// Generate private key
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privKey := make([]byte, 32)
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if _, err := rand.Read(privKey); err != nil {
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log.Fatal(err)
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}
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// Create keypair for Schnorr
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keypair, err := ctx.CreateKeypair(privKey)
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if err != nil {
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log.Fatal(err)
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}
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// Extract x-only public key
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xonly, pkParity, err := ctx.KeypairXOnlyPub(keypair)
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if err != nil {
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log.Fatal(err)
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}
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fmt.Printf("X-only public key: %x\n", xonly)
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fmt.Printf("Public key parity: %d\n", pkParity)
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// Sign with Schnorr
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message := []byte("Hello, Schnorr!")
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msgHash := sha256.Sum256(message)
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auxRand := make([]byte, 32)
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if _, err := rand.Read(auxRand); err != nil {
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log.Fatal(err)
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}
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sig, err := ctx.SchnorrSign(msgHash[:], keypair, auxRand)
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if err != nil {
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log.Fatal(err)
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}
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fmt.Printf("Schnorr signature: %x\n", sig)
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// Verify Schnorr signature
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valid, err := ctx.SchnorrVerify(sig, msgHash[:], xonly[:])
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if err != nil {
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log.Fatal(err)
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}
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fmt.Printf("Schnorr signature valid: %v\n", valid)
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// Test with wrong message
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wrongMsg := []byte("Wrong message!")
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wrongHash := sha256.Sum256(wrongMsg)
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valid2, err := ctx.SchnorrVerify(sig, wrongHash[:], xonly[:])
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if err != nil {
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log.Fatal(err)
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}
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fmt.Printf("Schnorr signature valid (wrong msg): %v\n", valid2)
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}
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