private static boolean fitsInLong(BigInteger big) {
    return big.bitLength() <= 63;
  }

  private static final BigInteger MAX_LONG = BigInteger.valueOf(Long.MAX_VALUE);
  private static final BigInteger MIN_LONG = BigInteger.valueOf(Long.MIN_VALUE);

  private static long saturatedCast(BigInteger big) {
    if (big.compareTo(MAX_LONG) > 0) {
      return Long.MAX_VALUE;
    }
    if (big.compareTo(MIN_LONG) < 0) {

  private static boolean fitsInLong(BigInteger big) {
    return big.bitLength() <= 63;
  }

  private static final BigInteger MAX_LONG = BigInteger.valueOf(Long.MAX_VALUE);
  private static final BigInteger MIN_LONG = BigInteger.valueOf(Long.MIN_VALUE);

  private static long saturatedCast(BigInteger big) {
    if (big.compareTo(MAX_LONG) > 0) {
      return Long.MAX_VALUE;
    }
    if (big.compareTo(MIN_LONG) < 0) {

	}
	p := d.p[0:n]
	d.p = d.p[n:]
	return p
}

func (d *dataIO) big4() (n uint32, ok bool) {
	p := d.read(4)
	if len(p) < 4 {
		d.error = true
		return 0, false
	}
	return uint32(p[3]) | uint32(p[2])<<8 | uint32(p[1])<<16 | uint32(p[0])<<24, true
}

func (d *dataIO) big8() (n uint64, ok bool) {
	n1, ok1 := d.big4()
	n2, ok2 := d.big4()
	if !ok1 || !ok2 {
		d.error = true
		return 0, false
	}

	}

	// Fill in the backwards-compatibility *big.Int values.
	if priv.Precomputed.Dp != nil {
		return
	}

	priv.Precomputed.Dp = new(big.Int).Sub(priv.Primes[0], bigOne)
	priv.Precomputed.Dp.Mod(priv.D, priv.Precomputed.Dp)

	priv.Precomputed.Dq = new(big.Int).Sub(priv.Primes[1], bigOne)
	priv.Precomputed.Dq.Mod(priv.D, priv.Precomputed.Dq)

	priv.Precomputed.Qinv = new(big.Int).ModInverse(priv.Primes[1], priv.Primes[0])

func TestZetas(t *testing.T) {
	ζ := big.NewInt(17)
	q := big.NewInt(q)
	for k, zeta := range zetas {
		// ζ^BitRev7(k) mod q
		exp := new(big.Int).Exp(ζ, big.NewInt(int64(BitRev7(uint8(k)))), q)
		if big.NewInt(int64(zeta)).Cmp(exp) != 0 {
			t.Errorf("zetas[%d] = %v, expected %v", k, zeta, exp)
		}
	}
}

func TestGammas(t *testing.T) {
	ζ := big.NewInt(17)
	q := big.NewInt(q)
	for k, gamma := range gammas {

					}
					x = int(big)

				case reflect.Uint:
					if m.Name == "Uint" {
						continue
					}
					big := uint64s[repeat%len(uint64s)]
					if uint64(uint(big)) != big {
						r.Uint64N(big) // what would happen on 64-bit machine, to keep stream in sync
						if *update {
							t.Fatalf("must run -update on 64-bit machine")
						}
						p++
						continue
					}
					x = uint(big)

				case reflect.Int32:

		},
		{
			name:         "service cidr is too big",
			expectErrors: true,
			options:      makeOptionsWithCIDRs("10.0.0.0/8", ""),
		},
		{
			name:         "service cidr IPv4 is too big but gate enbled",
			expectErrors: false,
			options:      makeOptionsWithCIDRs("10.0.0.0/8", ""),
			gate:         true,
		},
		{
			name:         "service cidr IPv6 is too big but gate enbled",
			expectErrors: false,

func (curve *nistCurve[Point]) pointToAffine(p Point) (x, y *big.Int, err error) {
	out := p.Bytes()
	if len(out) == 1 && out[0] == 0 {
		// This is the encoding of the point at infinity.
		return nil, nil, errors.New("ecdsa: public key point is the infinity")
	}
	byteLen := (curve.curve.Params().BitSize + 7) / 8
	x = new(big.Int).SetBytes(out[1 : 1+byteLen])
	y = new(big.Int).SetBytes(out[1+byteLen:])
	return x, y, nil
}

func TestLittleEndianPtrWrite(t *testing.T) { testWrite(t, LittleEndian, little, &s) }

func TestBigEndianRead(t *testing.T)     { testRead(t, BigEndian, big, s) }
func TestBigEndianWrite(t *testing.T)    { testWrite(t, BigEndian, big, s) }
func TestBigEndianPtrWrite(t *testing.T) { testWrite(t, BigEndian, big, &s) }

func TestReadSlice(t *testing.T) {
	t.Run("Read", func(t *testing.T) {
		slice := make([]int32, 2)

	}

	if r0.Cmp(r1) == 0 {
		t.Errorf("two signatures of the same message produced the same nonce")
	}
}

func fromHex(s string) *big.Int {
	r, ok := new(big.Int).SetString(s, 16)
	if !ok {
		panic("bad hex")
	}
	return r
}

func TestVectors(t *testing.T) {
	// This test runs the full set of NIST test vectors from