"encoding/pem"
	"errors"
	"fmt"
	"math/big"
	"os"
	"strings"
	"time"

	"istio.io/istio/pkg/log"
)

// SupportedECSignatureAlgorithms are the types of EC Signature Algorithms
// to be used in key generation (e.g. ECDSA or ED2551)
type SupportedECSignatureAlgorithms string

// SupportedEllipticCurves are the types of curves
// to be used in key generation (e.g. P256, P384)
type SupportedEllipticCurves string

// is used then an error is returned
func GetEllipticCurve(privKey *crypto.PrivateKey) (elliptic.Curve, error) {
	switch key := (*privKey).(type) {
	// this should agree with var SupportedECSignatureAlgorithms
	case *ecdsa.PrivateKey:
		if key.Curve == elliptic.P384() {
			return key.Curve, nil
		}
		return elliptic.P256(), nil
	default:
		return nil, fmt.Errorf("private key is not ECDSA based")
	}

			}
		})
	}
}

func createFakeCsr(t *testing.T) []byte {
	options := pkiutil.CertOptions{
		Host:       testCsrHostName,
		RSAKeySize: 2048,
		PKCS8Key:   false,
		ECSigAlg:   pkiutil.SupportedECSignatureAlgorithms("ECDSA"),
	}
	csrPEM, _, err := pkiutil.GenCSR(options)
	if err != nil {
		t.Fatalf("Error creating Mock CA client: %v", err)
		return nil
	}
	return csrPEM
}

			}
		})
	}
}

func createFakeCsr(t *testing.T) []byte {
	options := pkiutil.CertOptions{
		Host:       "fake.com",
		RSAKeySize: 2048,
		PKCS8Key:   false,
		ECSigAlg:   pkiutil.SupportedECSignatureAlgorithms("ECDSA"),
	}
	csrPEM, _, err := pkiutil.GenCSR(options)
	if err != nil {
		t.Fatalf("Error creating Mock CA client: %v", err)
		return nil
	}
	return csrPEM
}

		t.Fatalf("Private key does not match, want %v got %v", KeyPem, serverSecret.Data[PrivateKeyFile])
	}
}

func createCA(maxTTL time.Duration, ecSigAlg util.SupportedECSignatureAlgorithms) (*IstioCA, error) {
	// Generate root CA key and cert.
	rootCAOpts := util.CertOptions{
		IsCA:         true,
		IsSelfSigned: true,
		TTL:          time.Hour,
		Org:          "Root CA",

	options := pkiutil.CertOptions{
		Host:       csrHostName.String(),
		RSAKeySize: sc.configOptions.WorkloadRSAKeySize,
		PKCS8Key:   sc.configOptions.Pkcs8Keys,
		ECSigAlg:   pkiutil.SupportedECSignatureAlgorithms(sc.configOptions.ECCSigAlg),
		ECCCurve:   pkiutil.SupportedEllipticCurves(sc.configOptions.ECCCurve),
	}

	// Generate the cert/key, send CSR to CA.
	csrPEM, keyPEM, err := pkiutil.GenCSR(options)