diff options
Diffstat (limited to 'core/src/main/java/org/bouncycastle/math/ec/custom/sec/SecP192K1Field.java')
-rw-r--r-- | core/src/main/java/org/bouncycastle/math/ec/custom/sec/SecP192K1Field.java | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/core/src/main/java/org/bouncycastle/math/ec/custom/sec/SecP192K1Field.java b/core/src/main/java/org/bouncycastle/math/ec/custom/sec/SecP192K1Field.java deleted file mode 100644 index 1a0bde81..00000000 --- a/core/src/main/java/org/bouncycastle/math/ec/custom/sec/SecP192K1Field.java +++ /dev/null @@ -1,177 +0,0 @@ -package org.bouncycastle.math.ec.custom.sec; - -import java.math.BigInteger; - -import org.bouncycastle.math.raw.Nat; -import org.bouncycastle.math.raw.Nat192; - -public class SecP192K1Field -{ - // 2^192 - 2^32 - 2^12 - 2^8 - 2^7 - 2^6 - 2^3 - 1 - static final int[] P = new int[]{ 0xFFFFEE37, 0xFFFFFFFE, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF }; - static final int[] PExt = new int[]{ 0x013C4FD1, 0x00002392, 0x00000001, 0x00000000, 0x00000000, - 0x00000000, 0xFFFFDC6E, 0xFFFFFFFD, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF }; - private static final int[] PExtInv = new int[]{ 0xFEC3B02F, 0xFFFFDC6D, 0xFFFFFFFE, 0xFFFFFFFF, 0xFFFFFFFF, - 0xFFFFFFFF, 0x00002391, 0x00000002 }; - private static final int P5 = 0xFFFFFFFF; - private static final int PExt11 = 0xFFFFFFFF; - private static final int PInv33 = 0x11C9; - - public static void add(int[] x, int[] y, int[] z) - { - int c = Nat192.add(x, y, z); - if (c != 0 || (z[5] == P5 && Nat192.gte(z, P))) - { - Nat.add33To(6, PInv33, z); - } - } - - public static void addExt(int[] xx, int[] yy, int[] zz) - { - int c = Nat.add(12, xx, yy, zz); - if (c != 0 || (zz[11] == PExt11 && Nat.gte(12, zz, PExt))) - { - if (Nat.addTo(PExtInv.length, PExtInv, zz) != 0) - { - Nat.incAt(12, zz, PExtInv.length); - } - } - } - - public static void addOne(int[] x, int[] z) - { - int c = Nat.inc(6, x, z); - if (c != 0 || (z[5] == P5 && Nat192.gte(z, P))) - { - Nat.add33To(6, PInv33, z); - } - } - - public static int[] fromBigInteger(BigInteger x) - { - int[] z = Nat192.fromBigInteger(x); - if (z[5] == P5 && Nat192.gte(z, P)) - { - Nat192.subFrom(P, z); - } - return z; - } - - public static void half(int[] x, int[] z) - { - if ((x[0] & 1) == 0) - { - Nat.shiftDownBit(6, x, 0, z); - } - else - { - int c = Nat192.add(x, P, z); - Nat.shiftDownBit(6, z, c); - } - } - - public static void multiply(int[] x, int[] y, int[] z) - { - int[] tt = Nat192.createExt(); - Nat192.mul(x, y, tt); - reduce(tt, z); - } - - public static void multiplyAddToExt(int[] x, int[] y, int[] zz) - { - int c = Nat192.mulAddTo(x, y, zz); - if (c != 0 || (zz[11] == PExt11 && Nat.gte(12, zz, PExt))) - { - if (Nat.addTo(PExtInv.length, PExtInv, zz) != 0) - { - Nat.incAt(12, zz, PExtInv.length); - } - } - } - - public static void negate(int[] x, int[] z) - { - if (Nat192.isZero(x)) - { - Nat192.zero(z); - } - else - { - Nat192.sub(P, x, z); - } - } - - public static void reduce(int[] xx, int[] z) - { - long cc = Nat192.mul33Add(PInv33, xx, 6, xx, 0, z, 0); - int c = Nat192.mul33DWordAdd(PInv33, cc, z, 0); - - // assert c == 0L || c == 1L; - - if (c != 0 || (z[5] == P5 && Nat192.gte(z, P))) - { - Nat.add33To(6, PInv33, z); - } - } - - public static void reduce32(int x, int[] z) - { - if ((x != 0 && Nat192.mul33WordAdd(PInv33, x, z, 0) != 0) - || (z[5] == P5 && Nat192.gte(z, P))) - { - Nat.add33To(6, PInv33, z); - } - } - - public static void square(int[] x, int[] z) - { - int[] tt = Nat192.createExt(); - Nat192.square(x, tt); - reduce(tt, z); - } - - public static void squareN(int[] x, int n, int[] z) - { -// assert n > 0; - - int[] tt = Nat192.createExt(); - Nat192.square(x, tt); - reduce(tt, z); - - while (--n > 0) - { - Nat192.square(z, tt); - reduce(tt, z); - } - } - - public static void subtract(int[] x, int[] y, int[] z) - { - int c = Nat192.sub(x, y, z); - if (c != 0) - { - Nat.sub33From(6, PInv33, z); - } - } - - public static void subtractExt(int[] xx, int[] yy, int[] zz) - { - int c = Nat.sub(12, xx, yy, zz); - if (c != 0) - { - if (Nat.subFrom(PExtInv.length, PExtInv, zz) != 0) - { - Nat.decAt(12, zz, PExtInv.length); - } - } - } - - public static void twice(int[] x, int[] z) - { - int c = Nat.shiftUpBit(6, x, 0, z); - if (c != 0 || (z[5] == P5 && Nat192.gte(z, P))) - { - Nat.add33To(6, PInv33, z); - } - } -} |