1 files changed, 0 insertions, 254 deletions
diff --git a/core/src/main/java/org/bouncycastle/math/ec/custom/djb/Curve25519Field.java b/core/src/main/java/org/bouncycastle/math/ec/custom/djb/Curve25519Field.java
deleted file mode 100644
index 2e8e335d..00000000
--- a/core/src/main/java/org/bouncycastle/math/ec/custom/djb/Curve25519Field.java
+++ /dev/null
@@ -1,254 +0,0 @@
-package org.bouncycastle.math.ec.custom.djb;
-
-import java.math.BigInteger;
-
-import org.bouncycastle.math.raw.Nat;
-import org.bouncycastle.math.raw.Nat256;
-
-public class Curve25519Field
-{
-    private static final long M = 0xFFFFFFFFL;
-
-    // 2^255 - 2^4 - 2^1 - 1
-    static final int[] P = new int[]{ 0xFFFFFFED, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
-        0xFFFFFFFF, 0x7FFFFFFF };
-    private static final int P7 = 0x7FFFFFFF;
-    private static final int[] PExt = new int[]{ 0x00000169, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
-        0x00000000, 0x00000000, 0x00000000, 0xFFFFFFED, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
-        0xFFFFFFFF, 0x3FFFFFFF };
-    private static final int PInv = 0x13;
-
-    public static void add(int[] x, int[] y, int[] z)
-    {
-        Nat256.add(x, y, z);
-        if (Nat256.gte(z, P))
-        {
-            subPFrom(z);
-        }
-    }
-
-    public static void addExt(int[] xx, int[] yy, int[] zz)
-    {
-        Nat.add(16, xx, yy, zz);
-        if (Nat.gte(16, zz, PExt))
-        {
-            subPExtFrom(zz);
-        }
-    }
-
-    public static void addOne(int[] x, int[] z)
-    {
-        Nat.inc(8, x, z);
-        if (Nat256.gte(z, P))
-        {
-            subPFrom(z);
-        }
-    }
-
-    public static int[] fromBigInteger(BigInteger x)
-    {
-        int[] z = Nat256.fromBigInteger(x);
-        while (Nat256.gte(z, P))
-        {
-            Nat256.subFrom(P, z);
-        }
-        return z;
-    }
-
-    public static void half(int[] x, int[] z)
-    {
-        if ((x[0] & 1) == 0)
-        {
-            Nat.shiftDownBit(8, x, 0, z);
-        }
-        else
-        {
-            Nat256.add(x, P, z);
-            Nat.shiftDownBit(8, z, 0);
-        }
-    }
-
-    public static void multiply(int[] x, int[] y, int[] z)
-    {
-        int[] tt = Nat256.createExt();
-        Nat256.mul(x, y, tt);
-        reduce(tt, z);
-    }
-
-    public static void multiplyAddToExt(int[] x, int[] y, int[] zz)
-    {
-        Nat256.mulAddTo(x, y, zz);
-        if (Nat.gte(16, zz, PExt))
-        {
-            subPExtFrom(zz);
-        }
-    }
-
-    public static void negate(int[] x, int[] z)
-    {
-        if (Nat256.isZero(x))
-        {
-            Nat256.zero(z);
-        }
-        else
-        {
-            Nat256.sub(P, x, z);
-        }
-    }
-
-    public static void reduce(int[] xx, int[] z)
-    {
-//        assert xx[15] >>> 30 == 0;
-
-        int xx07 = xx[7];
-        Nat.shiftUpBit(8, xx, 8, xx07, z, 0);
-        int c = Nat256.mulByWordAddTo(PInv, xx, z) << 1;
-        int z7 = z[7];
-        c += (z7 >>> 31) - (xx07 >>> 31);
-        z7 &= P7;
-        z7 += Nat.addWordTo(7, c * PInv, z);
-        z[7] = z7;
-        if (Nat256.gte(z, P))
-        {
-            subPFrom(z);
-        }
-    }
-
-    public static void reduce27(int x, int[] z)
-    {
-//        assert x >>> 26 == 0;
-
-        int z7 = z[7];
-        int c = (x << 1 | z7 >>> 31);
-        z7 &= P7;
-        z7 += Nat.addWordTo(7, c * PInv, z);
-        z[7] = z7;
-        if (Nat256.gte(z, P))
-        {
-            subPFrom(z);
-        }
-    }
-
-    public static void square(int[] x, int[] z)
-    {
-        int[] tt = Nat256.createExt();
-        Nat256.square(x, tt);
-        reduce(tt, z);
-    }
-
-    public static void squareN(int[] x, int n, int[] z)
-    {
-//        assert n > 0;
-
-        int[] tt = Nat256.createExt();
-        Nat256.square(x, tt);
-        reduce(tt, z);
-
-        while (--n > 0)
-        {
-            Nat256.square(z, tt);
-            reduce(tt, z);
-        }
-    }
-
-    public static void subtract(int[] x, int[] y, int[] z)
-    {
-        int c = Nat256.sub(x, y, z);
-        if (c != 0)
-        {
-            addPTo(z);
-        }
-    }
-
-    public static void subtractExt(int[] xx, int[] yy, int[] zz)
-    {
-        int c = Nat.sub(16, xx, yy, zz);
-        if (c != 0)
-        {
-            addPExtTo(zz);
-        }
-    }
-
-    public static void twice(int[] x, int[] z)
-    {
-        Nat.shiftUpBit(8, x, 0, z);
-        if (Nat256.gte(z, P))
-        {
-            subPFrom(z);
-        }
-    }
-
-    private static int addPTo(int[] z)
-    {
-        long c = (z[0] & M) - PInv;
-        z[0] = (int)c;
-        c >>= 32;
-        if (c != 0)
-        {
-            c = Nat.decAt(7, z, 1);
-        }
-        c += (z[7] & M) + ((P7 + 1) & M);
-        z[7] = (int)c;
-        c >>= 32;
-        return (int)c;
-    }
-
-    private static int addPExtTo(int[] zz)
-    {
-        long c = (zz[0] & M) + (PExt[0] & M);
-        zz[0] = (int)c;
-        c >>= 32;
-        if (c != 0)
-        {
-            c = Nat.incAt(8, zz, 1);
-        }
-        c += (zz[8] & M) - PInv;
-        zz[8] = (int)c;
-        c >>= 32;
-        if (c != 0)
-        {
-            c = Nat.decAt(15, zz, 9);
-        }
-        c += (zz[15] & M) + ((PExt[15] + 1) & M);
-        zz[15] = (int)c;
-        c >>= 32;
-        return (int)c;
-    }
-
-    private static int subPFrom(int[] z)
-    {
-        long c = (z[0] & M) + PInv;
-        z[0] = (int)c;
-        c >>= 32;
-        if (c != 0)
-        {
-            c = Nat.incAt(7, z, 1);
-        }
-        c += (z[7] & M) - ((P7 + 1) & M);
-        z[7] = (int)c;
-        c >>= 32;
-        return (int)c;
-    }
-
-    private static int subPExtFrom(int[] zz)
-    {
-        long c = (zz[0] & M) - (PExt[0] & M);
-        zz[0] = (int)c;
-        c >>= 32;
-        if (c != 0)
-        {
-            c = Nat.decAt(8, zz, 1);
-        }
-        c += (zz[8] & M) + PInv;
-        zz[8] = (int)c;
-        c >>= 32;
-        if (c != 0)
-        {
-            c = Nat.incAt(15, zz, 9);
-        }
-        c += (zz[15] & M) - ((PExt[15] + 1) & M);
-        zz[15] = (int)c;
-        c >>= 32;
-        return (int)c;
-    }
-}