Msglen    uint16
	Version   uint8
	Type      uint8
	Addrs     int32
	Flags     int32
	Index     uint16
	Pad_cgo_0 [2]byte
	Data      IfData
}

type IfData struct {
	Type       uint8
	Typelen    uint8
	Physical   uint8
	Addrlen    uint8
	Hdrlen     uint8
	Recvquota  uint8
	Xmitquota  uint8
	Unused1    uint8
	Mtu        uint32
	Metric     uint32
	Baudrate   uint32
	Ipackets   uint32

	Msglen    uint16
	Version   uint8
	Type      uint8
	Addrs     int32
	Flags     int32
	Index     uint16
	Pad_cgo_0 [2]byte
	Data      IfData
}

type IfData struct {
	Type       uint8
	Typelen    uint8
	Physical   uint8
	Addrlen    uint8
	Hdrlen     uint8
	Recvquota  uint8
	Xmitquota  uint8
	Unused1    uint8
	Mtu        uint32
	Metric     uint32
	Baudrate   uint32
	Ipackets   uint32

)

type IfMsghdr struct {
	Msglen  uint16
	Version uint8
	Type    uint8
	Addrs   int32
	Flags   int32
	Index   uint16
	Data    IfData
}

type IfData struct {
	Type       uint8
	Typelen    uint8
	Physical   uint8
	Addrlen    uint8
	Hdrlen     uint8
	Recvquota  uint8
	Xmitquota  uint8
	Unused1    uint8
	Mtu        uint32
	Metric     uint32
	Baudrate   uint32
	Ipackets   uint32

)

type IfMsghdr struct {
	Msglen  uint16
	Version uint8
	Type    uint8
	Addrs   int32
	Flags   int32
	Index   uint16
	Data    IfData
}

type IfData struct {
	Type       uint8
	Typelen    uint8
	Physical   uint8
	Addrlen    uint8
	Hdrlen     uint8
	Recvquota  uint8
	Xmitquota  uint8
	Unused1    uint8
	Mtu        uint32
	Metric     uint32
	Baudrate   uint32
	Ipackets   uint32

		return p, errors.New("overflowing coordinate")
	}
	// Encode the coordinates and let SetBytes reject invalid points.
	byteLen := (curve.params.BitSize + 7) / 8
	buf := make([]byte, 1+2*byteLen)
	buf[0] = 4 // uncompressed point
	x.FillBytes(buf[1 : 1+byteLen])
	y.FillBytes(buf[1+byteLen : 1+2*byteLen])
	return curve.newPoint().SetBytes(buf)
}

func (curve *nistCurve[Point]) pointToAffine(p Point) (x, y *big.Int) {

		if curve.IsOnCurve(x, y) {
			t.Errorf("point off curve is claimed to be on the curve")
		}

		byteLen := (curve.Params().BitSize + 7) / 8
		b := make([]byte, 1+2*byteLen)
		b[0] = 4 // uncompressed point
		x.FillBytes(b[1 : 1+byteLen])
		y.FillBytes(b[1+byteLen : 1+2*byteLen])

		x1, y1 := Unmarshal(curve, b)
		if x1 != nil || y1 != nil {
			t.Errorf("unmarshaling a point not on the curve succeeded")

func Marshal(curve Curve, x, y *big.Int) []byte {
	panicIfNotOnCurve(curve, x, y)

	byteLen := (curve.Params().BitSize + 7) / 8

	ret := make([]byte, 1+2*byteLen)
	ret[0] = 4 // uncompressed point

	x.FillBytes(ret[1 : 1+byteLen])
	y.FillBytes(ret[1+byteLen : 1+2*byteLen])

	return ret
}

// MarshalCompressed converts a point on the curve into the compressed form

		if !bytes.Equal(g1.Bytes(), newPoint().Bytes()) {
			t.Error("[N - k]G + [k]G != ∞")
		}
	}

	byteLen := len(c.Params().N.Bytes())
	bitLen := c.Params().N.BitLen()
	t.Run("0", func(t *testing.T) { checkScalar(t, make([]byte, byteLen)) })
	t.Run("1", func(t *testing.T) {
		checkScalar(t, big.NewInt(1).FillBytes(make([]byte, byteLen)))
	})
	t.Run("N-1", func(t *testing.T) {

		return p, errors.New("overflowing coordinate")
	}
	// Encode the coordinates and let SetBytes reject invalid points.
	byteLen := (bitSize + 7) / 8
	buf := make([]byte, 1+2*byteLen)
	buf[0] = 4 // uncompressed point
	x.FillBytes(buf[1 : 1+byteLen])
	y.FillBytes(buf[1+byteLen : 1+2*byteLen])
	return curve.newPoint().SetBytes(buf)
}

// pointToAffine is used to convert a nistec Point to a PublicKey.

			}
			var byteLen int
			for shift := uint(0); ; shift += 7 {
				if shift >= 64 {
					return ErrIntOverflowGenerated
				}
				if iNdEx >= l {
					return io.ErrUnexpectedEOF
				}
				b := dAtA[iNdEx]
				iNdEx++
				byteLen |= int(b&0x7F) << shift
				if b < 0x80 {
					break
				}
			}
			if byteLen < 0 {
				return ErrInvalidLengthGenerated
			}