1 files changed, 43 insertions, 0 deletions
diff --git a/bcprov/src/main/java/org/bouncycastle/math/raw/Nat384.java b/bcprov/src/main/java/org/bouncycastle/math/raw/Nat384.java
new file mode 100644
index 0000000..889550e
--- /dev/null
+++ b/bcprov/src/main/java/org/bouncycastle/math/raw/Nat384.java
@@ -0,0 +1,43 @@
+package org.bouncycastle.math.raw;
+
+
+public abstract class Nat384
+{
+    public static void mul(int[] x, int[] y, int[] zz)
+    {
+        Nat192.mul(x, y, zz);
+        Nat192.mul(x, 6, y, 6, zz, 12);
+
+        int c18 = Nat192.addToEachOther(zz, 6, zz, 12);
+        int c12 = c18 + Nat192.addTo(zz, 0, zz, 6, 0);
+        c18 += Nat192.addTo(zz, 18, zz, 12, c12);
+
+        int[] dx = Nat192.create(), dy = Nat192.create();
+        boolean neg = Nat192.diff(x, 6, x, 0, dx, 0) != Nat192.diff(y, 6, y, 0, dy, 0);
+
+        int[] tt = Nat192.createExt();
+        Nat192.mul(dx, dy, tt);
+
+        c18 += neg ? Nat.addTo(12, tt, 0, zz, 6) : Nat.subFrom(12, tt, 0, zz, 6);
+        Nat.addWordAt(24, c18, zz, 18); 
+    }
+
+    public static void square(int[] x, int[] zz)
+    {
+        Nat192.square(x, zz);
+        Nat192.square(x, 6, zz, 12);
+
+        int c18 = Nat192.addToEachOther(zz, 6, zz, 12);
+        int c12 = c18 + Nat192.addTo(zz, 0, zz, 6, 0);
+        c18 += Nat192.addTo(zz, 18, zz, 12, c12);
+
+        int[] dx = Nat192.create();
+        Nat192.diff(x, 6, x, 0, dx, 0);
+
+        int[] tt = Nat192.createExt();
+        Nat192.square(dx, tt);
+
+        c18 += Nat.subFrom(12, tt, 0, zz, 6);
+        Nat.addWordAt(24, c18, zz, 18); 
+    }
+}