Welcome to mirror list, hosted at ThFree Co, Russian Federation.

gitlab.com/quite/humla-spongycastle.git - Unnamed repository; edit this file 'description' to name the repository.
summaryrefslogtreecommitdiff
path: root/core/src/main/java/org/bouncycastle/math/ec/custom/sec/SecP224R1Field.java
diff options
context:
space:
mode:
Diffstat (limited to 'core/src/main/java/org/bouncycastle/math/ec/custom/sec/SecP224R1Field.java')
-rw-r--r--core/src/main/java/org/bouncycastle/math/ec/custom/sec/SecP224R1Field.java298
1 files changed, 0 insertions, 298 deletions
diff --git a/core/src/main/java/org/bouncycastle/math/ec/custom/sec/SecP224R1Field.java b/core/src/main/java/org/bouncycastle/math/ec/custom/sec/SecP224R1Field.java
deleted file mode 100644
index 02a86f0f..00000000
--- a/core/src/main/java/org/bouncycastle/math/ec/custom/sec/SecP224R1Field.java
+++ /dev/null
@@ -1,298 +0,0 @@
-package org.bouncycastle.math.ec.custom.sec;
-
-import java.math.BigInteger;
-
-import org.bouncycastle.math.raw.Nat;
-import org.bouncycastle.math.raw.Nat224;
-
-public class SecP224R1Field
-{
- private static final long M = 0xFFFFFFFFL;
-
- // 2^224 - 2^96 + 1
- static final int[] P = new int[]{ 0x00000001, 0x00000000, 0x00000000, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF };
- static final int[] PExt = new int[]{ 0x00000001, 0x00000000, 0x00000000, 0xFFFFFFFE, 0xFFFFFFFF,
- 0xFFFFFFFF, 0x00000000, 0x00000002, 0x00000000, 0x00000000, 0xFFFFFFFE, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF };
- private static final int[] PExtInv = new int[]{ 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000001, 0x00000000,
- 0x00000000, 0xFFFFFFFF, 0xFFFFFFFD, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000001 };
- private static final int P6 = 0xFFFFFFFF;
- private static final int PExt13 = 0xFFFFFFFF;
-
- public static void add(int[] x, int[] y, int[] z)
- {
- int c = Nat224.add(x, y, z);
- if (c != 0 || (z[6] == P6 && Nat224.gte(z, P)))
- {
- addPInvTo(z);
- }
- }
-
- public static void addExt(int[] xx, int[] yy, int[] zz)
- {
- int c = Nat.add(14, xx, yy, zz);
- if (c != 0 || (zz[13] == PExt13 && Nat.gte(14, zz, PExt)))
- {
- if (Nat.addTo(PExtInv.length, PExtInv, zz) != 0)
- {
- Nat.incAt(14, zz, PExtInv.length);
- }
- }
- }
-
- public static void addOne(int[] x, int[] z)
- {
- int c = Nat.inc(7, x, z);
- if (c != 0 || (z[6] == P6 && Nat224.gte(z, P)))
- {
- addPInvTo(z);
- }
- }
-
- public static int[] fromBigInteger(BigInteger x)
- {
- int[] z = Nat224.fromBigInteger(x);
- if (z[6] == P6 && Nat224.gte(z, P))
- {
- Nat224.subFrom(P, z);
- }
- return z;
- }
-
- public static void half(int[] x, int[] z)
- {
- if ((x[0] & 1) == 0)
- {
- Nat.shiftDownBit(7, x, 0, z);
- }
- else
- {
- int c = Nat224.add(x, P, z);
- Nat.shiftDownBit(7, z, c);
- }
- }
-
- public static void multiply(int[] x, int[] y, int[] z)
- {
- int[] tt = Nat224.createExt();
- Nat224.mul(x, y, tt);
- reduce(tt, z);
- }
-
- public static void multiplyAddToExt(int[] x, int[] y, int[] zz)
- {
- int c = Nat224.mulAddTo(x, y, zz);
- if (c != 0 || (zz[13] == PExt13 && Nat.gte(14, zz, PExt)))
- {
- if (Nat.addTo(PExtInv.length, PExtInv, zz) != 0)
- {
- Nat.incAt(14, zz, PExtInv.length);
- }
- }
- }
-
- public static void negate(int[] x, int[] z)
- {
- if (Nat224.isZero(x))
- {
- Nat224.zero(z);
- }
- else
- {
- Nat224.sub(P, x, z);
- }
- }
-
- public static void reduce(int[] xx, int[] z)
- {
- long xx10 = xx[10] & M, xx11 = xx[11] & M, xx12 = xx[12] & M, xx13 = xx[13] & M;
-
- final long n = 1;
-
- long t0 = (xx[7] & M) + xx11 - n;
- long t1 = (xx[8] & M) + xx12;
- long t2 = (xx[9] & M) + xx13;
-
- long cc = 0;
- cc += (xx[0] & M) - t0;
- long z0 = cc & M;
- cc >>= 32;
- cc += (xx[1] & M) - t1;
- z[1] = (int)cc;
- cc >>= 32;
- cc += (xx[2] & M) - t2;
- z[2] = (int)cc;
- cc >>= 32;
- cc += (xx[3] & M) + t0 - xx10;
- long z3 = cc & M;
- cc >>= 32;
- cc += (xx[4] & M) + t1 - xx11;
- z[4] = (int)cc;
- cc >>= 32;
- cc += (xx[5] & M) + t2 - xx12;
- z[5] = (int)cc;
- cc >>= 32;
- cc += (xx[6] & M) + xx10 - xx13;
- z[6] = (int)cc;
- cc >>= 32;
- cc += n;
-
-// assert cc >= 0;
-
- z3 += cc;
-
- z0 -= cc;
- z[0] = (int)z0;
- cc = z0 >> 32;
- if (cc != 0)
- {
- cc += (z[1] & M);
- z[1] = (int)cc;
- cc >>= 32;
- cc += (z[2] & M);
- z[2] = (int)cc;
- z3 += cc >> 32;
- }
- z[3] = (int)z3;
- cc = z3 >> 32;
-
-// assert cc == 0 || cc == 1;
-
- if ((cc != 0 && Nat.incAt(7, z, 4) != 0)
- || (z[6] == P6 && Nat224.gte(z, P)))
- {
- addPInvTo(z);
- }
- }
-
- public static void reduce32(int x, int[] z)
- {
- long cc = 0;
-
- if (x != 0)
- {
- long xx07 = x & M;
-
- cc += (z[0] & M) - xx07;
- z[0] = (int)cc;
- cc >>= 32;
- if (cc != 0)
- {
- cc += (z[1] & M);
- z[1] = (int)cc;
- cc >>= 32;
- cc += (z[2] & M);
- z[2] = (int)cc;
- cc >>= 32;
- }
- cc += (z[3] & M) + xx07;
- z[3] = (int)cc;
- cc >>= 32;
-
-// assert cc == 0 || cc == 1;
- }
-
- if ((cc != 0 && Nat.incAt(7, z, 4) != 0)
- || (z[6] == P6 && Nat224.gte(z, P)))
- {
- addPInvTo(z);
- }
- }
-
- public static void square(int[] x, int[] z)
- {
- int[] tt = Nat224.createExt();
- Nat224.square(x, tt);
- reduce(tt, z);
- }
-
- public static void squareN(int[] x, int n, int[] z)
- {
-// assert n > 0;
-
- int[] tt = Nat224.createExt();
- Nat224.square(x, tt);
- reduce(tt, z);
-
- while (--n > 0)
- {
- Nat224.square(z, tt);
- reduce(tt, z);
- }
- }
-
- public static void subtract(int[] x, int[] y, int[] z)
- {
- int c = Nat224.sub(x, y, z);
- if (c != 0)
- {
- subPInvFrom(z);
- }
- }
-
- public static void subtractExt(int[] xx, int[] yy, int[] zz)
- {
- int c = Nat.sub(14, xx, yy, zz);
- if (c != 0)
- {
- if (Nat.subFrom(PExtInv.length, PExtInv, zz) != 0)
- {
- Nat.decAt(14, zz, PExtInv.length);
- }
- }
- }
-
- public static void twice(int[] x, int[] z)
- {
- int c = Nat.shiftUpBit(7, x, 0, z);
- if (c != 0 || (z[6] == P6 && Nat224.gte(z, P)))
- {
- addPInvTo(z);
- }
- }
-
- private static void addPInvTo(int[] z)
- {
- long c = (z[0] & M) - 1;
- z[0] = (int)c;
- c >>= 32;
- if (c != 0)
- {
- c += (z[1] & M);
- z[1] = (int)c;
- c >>= 32;
- c += (z[2] & M);
- z[2] = (int)c;
- c >>= 32;
- }
- c += (z[3] & M) + 1;
- z[3] = (int)c;
- c >>= 32;
- if (c != 0)
- {
- Nat.incAt(7, z, 4);
- }
- }
-
- private static void subPInvFrom(int[] z)
- {
- long c = (z[0] & M) + 1;
- z[0] = (int)c;
- c >>= 32;
- if (c != 0)
- {
- c += (z[1] & M);
- z[1] = (int)c;
- c >>= 32;
- c += (z[2] & M);
- z[2] = (int)c;
- c >>= 32;
- }
- c += (z[3] & M) - 1;
- z[3] = (int)c;
- c >>= 32;
- if (c != 0)
- {
- Nat.decAt(7, z, 4);
- }
- }
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-23 09:06:58 +0300