package secp256r1

import (
	"crypto/ecdsa"
	"math/big"
)

// Verifies the given signature (r, s) for the given hash and public key (x, y).
func Verify(hash []byte, r, s, x, y *big.Int) bool {
	// Create the public key format
	publicKey := newPublicKey(x, y)

	// Check if they are invalid public key coordinates
	if publicKey == nil {
		return false
	}

	// Verify the signature with the public key,
	// then return true if it's valid, false otherwise
	return ecdsa.Verify(publicKey, hash, r, s)
}