}
	if err = cert.CheckSignatureFrom(cert); err == nil {
		t.Fatalf("certificate verification succeeded incorrectly")
	}
	if _, ok := err.(InsecureAlgorithmError); !ok {
		t.Fatalf("certificate verification returned %v (%T), wanted InsecureAlgorithmError", err, err)
	}
}

func TestSHA1(t *testing.T) {
	pemBlock, _ := pem.Decode([]byte(ecdsaSHA1CertPem))
	cert, err := ParseCertificate(pemBlock.Bytes)