public override ECFieldElement SquarePlusProduct(ECFieldElement x, ECFieldElement y)
{
ulong[] numArray = this.x;
ulong[] numArray2 = ((SecT283FieldElement)x).x;
ulong[] numArray3 = ((SecT283FieldElement)y).x;
ulong[] zz = Nat.Create64(9);
SecT283Field.SquareAddToExt(numArray, zz);
SecT283Field.MultiplyAddToExt(numArray2, numArray3, zz);
ulong[] z = Nat320.Create64();
SecT283Field.Reduce(zz, z);
return(new SecT283FieldElement(z));
}
public override ECFieldElement MultiplyPlusProduct(ECFieldElement b, ECFieldElement x, ECFieldElement y)
{
ulong[] ax = this.x, bx = ((SecT283FieldElement)b).x;
ulong[] xx = ((SecT283FieldElement)x).x, yx = ((SecT283FieldElement)y).x;
ulong[] tt = Nat.Create64(9);
SecT283Field.MultiplyAddToExt(ax, bx, tt);
SecT283Field.MultiplyAddToExt(xx, yx, tt);
ulong[] z = Nat320.Create64();
SecT283Field.Reduce(tt, z);
return(new SecT283FieldElement(z));
}
public override ECFieldElement MultiplyPlusProduct(ECFieldElement b, ECFieldElement x, ECFieldElement y)
{
ulong[] array = this.x;
ulong[] y2 = ((SecT283FieldElement)b).x;
ulong[] array2 = ((SecT283FieldElement)x).x;
ulong[] y3 = ((SecT283FieldElement)y).x;
ulong[] array3 = Nat.Create64(9);
SecT283Field.MultiplyAddToExt(array, y2, array3);
SecT283Field.MultiplyAddToExt(array2, y3, array3);
ulong[] z = Nat320.Create64();
SecT283Field.Reduce(array3, z);
return(new SecT283FieldElement(z));
}
public override ECPoint LookupVar(int index)
{
ulong[] x = Nat320.Create64(), y = Nat320.Create64();
int pos = index * SECT283R1_FE_LONGS * 2;
for (int j = 0; j < SECT283R1_FE_LONGS; ++j)
{
x[j] = m_table[pos + j];
y[j] = m_table[pos + SECT283R1_FE_LONGS + j];
}
return(CreatePoint(x, y));
}
public virtual ECPoint Lookup(int index)
{
ulong[] x = Nat320.Create64(), y = Nat320.Create64();
int pos = 0;
for (int i = 0; i < m_size; ++i)
{
ulong MASK = (ulong)(long)(((i ^ index) - 1) >> 31);
for (int j = 0; j < SECT283R1_FE_LONGS; ++j)
{
x[j] ^= m_table[pos + j] & MASK;
y[j] ^= m_table[pos + SECT283R1_FE_LONGS + j] & MASK;
}
pos += (SECT283R1_FE_LONGS * 2);
}
return(m_outer.CreateRawPoint(new SecT283FieldElement(x), new SecT283FieldElement(y), false));
}
public override ECPoint Lookup(int index)
{
ulong[] x = Nat320.Create64(), y = Nat320.Create64();
int pos = 0;
for (int i = 0; i < m_size; ++i)
{
ulong MASK = (ulong)(long)(((i ^ index) - 1) >> 31);
for (int j = 0; j < SECT283R1_FE_LONGS; ++j)
{
x[j] ^= m_table[pos + j] & MASK;
y[j] ^= m_table[pos + SECT283R1_FE_LONGS + j] & MASK;
}
pos += (SECT283R1_FE_LONGS * 2);
}
return(CreatePoint(x, y));
}
public static void Sqrt(ulong[] x, ulong[] z)
{
ulong[] array = Nat320.Create64();
ulong num = Interleave.Unshuffle(x[0]);
ulong num2 = Interleave.Unshuffle(x[1]);
ulong num3 = (num & 0xFFFFFFFFu) | (num2 << 32);
array[0] = (num >> 32) | (num2 & 0xFFFFFFFF00000000uL);
num = Interleave.Unshuffle(x[2]);
num2 = Interleave.Unshuffle(x[3]);
ulong num4 = (num & 0xFFFFFFFFu) | (num2 << 32);
array[1] = (num >> 32) | (num2 & 0xFFFFFFFF00000000uL);
num = Interleave.Unshuffle(x[4]);
ulong num5 = num & 0xFFFFFFFFu;
array[2] = num >> 32;
Multiply(array, ROOT_Z, z);
ulong[] array2;
(array2 = z)[0] = array2[0] ^ num3;
(array2 = z)[1] = array2[1] ^ num4;
(array2 = z)[2] = array2[2] ^ num5;
}
public static void Invert(ulong[] x, ulong[] z)
{
if (Nat320.IsZero64(x))
{
throw new InvalidOperationException();
}
// Itoh-Tsujii inversion
ulong[] t0 = Nat320.Create64();
ulong[] t1 = Nat320.Create64();
Square(x, t0);
Multiply(t0, x, t0);
SquareN(t0, 2, t1);
Multiply(t1, t0, t1);
SquareN(t1, 4, t0);
Multiply(t0, t1, t0);
SquareN(t0, 8, t1);
Multiply(t1, t0, t1);
Square(t1, t1);
Multiply(t1, x, t1);
SquareN(t1, 17, t0);
Multiply(t0, t1, t0);
Square(t0, t0);
Multiply(t0, x, t0);
SquareN(t0, 35, t1);
Multiply(t1, t0, t1);
SquareN(t1, 70, t0);
Multiply(t0, t1, t0);
Square(t0, t0);
Multiply(t0, x, t0);
SquareN(t0, 141, t1);
Multiply(t1, t0, t1);
Square(t1, z);
}
public override ECFieldElement Multiply(ECFieldElement b)
{
ulong[] z = Nat320.Create64();
SecT283Field.Multiply(x, ((SecT283FieldElement)b).x, z);
return(new SecT283FieldElement(z));
}
public override ECFieldElement AddOne()
{
ulong[] z = Nat320.Create64();
SecT283Field.AddOne(x, z);
return(new SecT283FieldElement(z));
}
public SecT283FieldElement()
{
this.x = Nat320.Create64();
}
public override ECFieldElement Square()
{
ulong[] z = Nat320.Create64();
SecT283Field.Square(this.x, z);
return(new SecT283FieldElement(z));
}
public override ECFieldElement Add(ECFieldElement b)
{
ulong[] z = Nat320.Create64();
SecT283Field.Add(this.x, ((SecT283FieldElement)b).x, z);
return(new SecT283FieldElement(z));
}
