-----END PUBLIC KEY-----`

// Obtained by:
//
//  1. Serializing ecdsaPublicKey as DER
//  2. Taking the SHA256 of the DER bytes
//  3. URLSafe Base64-encoding the sha bytes
const ecdsaKeyID = "SoABiieYuNx4UdqYvZRVeuC6SihxgLrhLy9peHMHpTc"

func getPrivateKey(data string) interface{} {
	key, err := keyutil.ParsePrivateKeyPEM([]byte(data))
	if err != nil {
		panic(fmt.Errorf("unexpected error parsing private key: %v", err))
	}