diff --git a/crypto/src/math/raw/Nat384.cs b/crypto/src/math/raw/Nat384.cs
new file mode 100644
index 000000000..ed1c47e8c
--- /dev/null
+++ b/crypto/src/math/raw/Nat384.cs
@@ -0,0 +1,46 @@
+using System;
+using System.Diagnostics;
+
+namespace Org.BouncyCastle.Math.Raw
+{
+ internal abstract class Nat384
+ {
+ public static void Mul(uint[] x, uint[] y, uint[] zz)
+ {
+ Nat192.Mul(x, y, zz);
+ Nat192.Mul(x, 6, y, 6, zz, 12);
+
+ uint c18 = Nat192.AddToEachOther(zz, 6, zz, 12);
+ uint c12 = c18 + Nat192.AddTo(zz, 0, zz, 6, 0);
+ c18 += Nat192.AddTo(zz, 18, zz, 12, c12);
+
+ uint[] dx = Nat192.Create(), dy = Nat192.Create();
+ bool neg = Nat192.Diff(x, 6, x, 0, dx, 0) != Nat192.Diff(y, 6, y, 0, dy, 0);
+
+ uint[] tt = Nat192.CreateExt();
+ Nat192.Mul(dx, dy, tt);
+
+ c18 += neg ? Nat.AddTo(12, tt, 0, zz, 6) : (uint)Nat.SubFrom(12, tt, 0, zz, 6);
+ Nat.AddWordAt(24, c18, zz, 18);
+ }
+
+ public static void Square(uint[] x, uint[] zz)
+ {
+ Nat192.Square(x, zz);
+ Nat192.Square(x, 6, zz, 12);
+
+ uint c18 = Nat192.AddToEachOther(zz, 6, zz, 12);
+ uint c12 = c18 + Nat192.AddTo(zz, 0, zz, 6, 0);
+ c18 += Nat192.AddTo(zz, 18, zz, 12, c12);
+
+ uint[] dx = Nat192.Create();
+ Nat192.Diff(x, 6, x, 0, dx, 0);
+
+ uint[] m = Nat192.CreateExt();
+ Nat192.Square(dx, m);
+
+ c18 += (uint)Nat.SubFrom(12, m, 0, zz, 6);
+ Nat.AddWordAt(24, c18, zz, 18);
+ }
+ }
+}
|
