key, err := x509.ParseECPrivateKey(b)
		if err != nil {
			return nil, err
		}
		return key.Public(), nil
	})
}

func loadECDSAPrivKey(t *testing.T, filepath string, alg jose.SignatureAlgorithm) *jose.JSONWebKey {
	return loadKey(t, filepath, alg, func(b []byte) (interface{}, error) {
		return x509.ParseECPrivateKey(b)
	})
}

	hexKey        string
	errorContains string
}{
	{hexKey: hexPKCS1TestPKCS8Key, errorContains: "use ParsePKCS8PrivateKey instead"},
	{hexKey: hexPKCS1TestECKey, errorContains: "use ParseECPrivateKey instead"},
}

func TestPKCS1MismatchKeyFormat(t *testing.T) {
	for i, test := range pkcs1MismatchKeyTests {
		derBytes, _ := hex.DecodeString(test.hexKey)
		_, err := ParsePKCS1PrivateKey(derBytes)