public static void SubtractExt(uint[] xx, uint[] yy, uint[] zz)
{
if ((Nat.Sub(12, xx, yy, zz) != 0) && (Nat.SubFrom(PExtInv.Length, PExtInv, zz) != 0))
{
Nat.DecAt(12, zz, PExtInv.Length);
}
}
private static void SubPInvFrom(uint[] z)
{
long num = z[0] - 1L;
z[0] = (uint)num;
num = num >> 0x20;
num = ((long)((ulong)num)) + (z[1] + 1L);
z[1] = (uint)num;
num = num >> 0x20;
if (num != 0L)
{
num += z[2];
z[2] = (uint)num;
num = num >> 0x20;
}
num = ((long)((ulong)num)) + (z[3] - 1L);
z[3] = (uint)num;
num = num >> 0x20;
num = ((long)((ulong)num)) + (z[4] - 1L);
z[4] = (uint)num;
num = num >> 0x20;
if (num != 0L)
{
Nat.DecAt(12, z, 5);
}
}
private static void SubPInvFrom(uint[] z)
{
long c = (long)z[0] - 1;
z[0] = (uint)c;
c >>= 32;
c += (long)z[1] + 1;
z[1] = (uint)c;
c >>= 32;
if (c != 0)
{
c += (long)z[2];
z[2] = (uint)c;
c >>= 32;
}
c += (long)z[3] - 1;
z[3] = (uint)c;
c >>= 32;
c += (long)z[4] - 1;
z[4] = (uint)c;
c >>= 32;
if (c != 0)
{
Nat.DecAt(12, z, 5);
}
}
public static void SubtractExt(uint[] xx, uint[] yy, uint[] zz)
{
if (Nat.Sub(24, xx, yy, zz) != 0 && Nat.SubFrom(PExtInv.Length, PExtInv, zz) != 0)
{
Nat.DecAt(24, zz, PExtInv.Length);
}
}
private static void SubPInvFrom(uint[] z)
{
long num = (long)z[0] - 1L;
z[0] = (uint)num;
num >>= 32;
num += (long)z[1] + 1L;
z[1] = (uint)num;
num >>= 32;
if (num != 0L)
{
num += z[2];
z[2] = (uint)num;
num >>= 32;
}
num += (long)z[3] - 1L;
z[3] = (uint)num;
num >>= 32;
num += (long)z[4] - 1L;
z[4] = (uint)num;
num >>= 32;
if (num != 0L)
{
Nat.DecAt(12, z, 5);
}
}
public static void SubtractExt(uint[] xx, uint[] yy, uint[] zz)
{
int num = Nat.Sub(10, xx, yy, zz);
if (num != 0 && Nat.SubFrom(SecP160R2Field.PExtInv.Length, SecP160R2Field.PExtInv, zz) != 0)
{
Nat.DecAt(10, zz, SecP160R2Field.PExtInv.Length);
}
}
private static void SubPInvFrom(uint[] z)
{
long c = (long)z[0] - PInv;
z[0] = (uint)c;
c >>= 32;
if (c != 0)
{
Nat.DecAt(7, z, 1);
}
z[7] &= P7;
}
public static void SubtractExt(uint[] xx, uint[] yy, uint[] zz)
{
int c = Nat.Sub(10, xx, yy, zz);
if (c != 0)
{
if (Nat.SubFrom(PExtInv.Length, PExtInv, zz) != 0)
{
Nat.DecAt(10, zz, PExtInv.Length);
}
}
}
private static uint AddPTo(uint[] z)
{
long c = (long)z[0] - PInv;
z[0] = (uint)c;
c >>= 32;
if (c != 0)
{
c = Nat.DecAt(7, z, 1);
}
c += (long)z[7] + (P7 + 1);
z[7] = (uint)c;
c >>= 32;
return((uint)c);
}
private static uint AddPTo(uint[] z)
{
long num = (long)((ulong)z[0] - 19uL);
z[0] = (uint)num;
num >>= 32;
if (num != 0L)
{
num = (long)Nat.DecAt(7, z, 1);
}
num += (long)((ulong)z[7] + (ulong)-2147483648);
z[7] = (uint)num;
num >>= 32;
return((uint)num);
}
private static uint AddPTo(uint[] z)
{
long num = z[0] - 0x13L;
z[0] = (uint)num;
num = num >> 0x20;
if (num != 0L)
{
num = Nat.DecAt(7, z, 1);
}
num = (long)(((ulong)num) + (z[7] + 0x80000000L));
z[7] = (uint)num;
num = num >> 0x20;
return((uint)num);
}
private static uint AddPTo(uint[] z)
{
long num = (long)z[0] - 19L;
z[0] = (uint)num;
num >>= 32;
if (num != 0)
{
num = Nat.DecAt(7, z, 1);
}
num += (long)z[7] + 2147483648L;
z[7] = (uint)num;
num >>= 32;
return((uint)num);
}
private static void SubPInvFrom(uint[] z)
{
long num = (long)z[0] - 1L;
z[0] = (uint)num;
num >>= 32;
if (num != 0)
{
num += z[1];
z[1] = (uint)num;
num >>= 32;
}
num += (long)z[2] - 1L;
z[2] = (uint)num;
num >>= 32;
if (num != 0)
{
Nat.DecAt(6, z, 3);
}
}
private static void SubPInvFrom(uint[] z)
{
long c = (long)z[0] - 1;
z[0] = (uint)c;
c >>= 32;
if (c != 0)
{
c += (long)z[1];
z[1] = (uint)c;
c >>= 32;
}
c += (long)z[2] - 1;
z[2] = (uint)c;
c >>= 32;
if (c != 0)
{
Nat.DecAt(6, z, 3);
}
}
private static int SubPExtFrom(uint[] zz)
{
long num = zz[0] - PExt[0];
zz[0] = (uint)num;
num = num >> 0x20;
if (num != 0L)
{
num = Nat.DecAt(8, zz, 1);
}
num = ((long)((ulong)num)) + (zz[8] + 0x13L);
zz[8] = (uint)num;
num = num >> 0x20;
if (num != 0L)
{
num = Nat.IncAt(15, zz, 9);
}
num = (long)(((ulong)num) + (zz[15] - (PExt[15] + 1)));
zz[15] = (uint)num;
num = num >> 0x20;
return((int)num);
}
private static int SubPExtFrom(uint[] zz)
{
long c = (long)zz[0] - PExt[0];
zz[0] = (uint)c;
c >>= 32;
if (c != 0)
{
c = Nat.DecAt(8, zz, 1);
}
c += (long)zz[8] + PInv;
zz[8] = (uint)c;
c >>= 32;
if (c != 0)
{
c = Nat.IncAt(15, zz, 9);
}
c += (long)zz[15] - (PExt[15] + 1);
zz[15] = (uint)c;
c >>= 32;
return((int)c);
}
private static uint AddPExtTo(uint[] zz)
{
long c = (long)zz[0] + PExt[0];
zz[0] = (uint)c;
c >>= 32;
if (c != 0)
{
c = Nat.IncAt(8, zz, 1);
}
c += (long)zz[8] - PInv;
zz[8] = (uint)c;
c >>= 32;
if (c != 0)
{
c = Nat.DecAt(15, zz, 9);
}
c += (long)zz[15] + (PExt[15] + 1);
zz[15] = (uint)c;
c >>= 32;
return((uint)c);
}
private static uint AddPExtTo(uint[] zz)
{
long num = (long)((ulong)zz[0] + (ulong)Curve25519Field.PExt[0]);
zz[0] = (uint)num;
num >>= 32;
if (num != 0L)
{
num = (long)((ulong)Nat.IncAt(8, zz, 1));
}
num += (long)((ulong)zz[8] - 19uL);
zz[8] = (uint)num;
num >>= 32;
if (num != 0L)
{
num = (long)Nat.DecAt(15, zz, 9);
}
num += (long)((ulong)zz[15] + (ulong)(Curve25519Field.PExt[15] + 1u));
zz[15] = (uint)num;
num >>= 32;
return((uint)num);
}
private static int SubPExtFrom(uint[] zz)
{
long num = (long)zz[0] - (long)PExt[0];
zz[0] = (uint)num;
num >>= 32;
if (num != 0)
{
num = Nat.DecAt(8, zz, 1);
}
num += (long)zz[8] + 19L;
zz[8] = (uint)num;
num >>= 32;
if (num != 0)
{
num = Nat.IncAt(15, zz, 9);
}
num += (long)zz[15] - (long)(PExt[15] + 1);
zz[15] = (uint)num;
num >>= 32;
return((int)num);
}
private static uint AddPExtTo(uint[] zz)
{
long num = (long)zz[0] + (long)PExt[0];
zz[0] = (uint)num;
num >>= 32;
if (num != 0)
{
num = Nat.IncAt(8, zz, 1);
}
num += (long)zz[8] - 19L;
zz[8] = (uint)num;
num >>= 32;
if (num != 0)
{
num = Nat.DecAt(15, zz, 9);
}
num += (long)zz[15] + (long)(PExt[15] + 1);
zz[15] = (uint)num;
num >>= 32;
return((uint)num);
}
private static uint AddPExtTo(uint[] zz)
{
long num = zz[0] + PExt[0];
zz[0] = (uint)num;
num = num >> 0x20;
if (num != 0L)
{
num = Nat.IncAt(8, zz, 1);
}
num = ((long)((ulong)num)) + (zz[8] - 0x13L);
zz[8] = (uint)num;
num = num >> 0x20;
if (num != 0L)
{
num = Nat.DecAt(15, zz, 9);
}
num = (long)(((ulong)num) + (zz[15] + (PExt[15] + 1)));
zz[15] = (uint)num;
num = num >> 0x20;
return((uint)num);
}
private static int SubPExtFrom(uint[] zz)
{
long num = (long)((ulong)zz[0] - (ulong)Curve25519Field.PExt[0]);
zz[0] = (uint)num;
num >>= 32;
if (num != 0L)
{
num = (long)Nat.DecAt(8, zz, 1);
}
num += (long)((ulong)zz[8] + 19uL);
zz[8] = (uint)num;
num >>= 32;
if (num != 0L)
{
num = (long)((ulong)Nat.IncAt(15, zz, 9));
}
num += (long)((ulong)zz[15] - (ulong)(Curve25519Field.PExt[15] + 1u));
zz[15] = (uint)num;
num >>= 32;
return((int)num);
}
private static void SubPInvFrom(uint[] z)
{
long num = (long)((ulong)z[0] + 1uL);
z[0] = (uint)num;
num >>= 32;
if (num != 0L)
{
num += (long)((ulong)z[1]);
z[1] = (uint)num;
num >>= 32;
num += (long)((ulong)z[2]);
z[2] = (uint)num;
num >>= 32;
}
num += (long)((ulong)z[3] - 1uL);
z[3] = (uint)num;
num >>= 32;
if (num != 0L)
{
Nat.DecAt(7, z, 4);
}
}
