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陈彬
2020-07-09 08:50:24 +08:00
parent 13d25f4707
commit c523462b82
1818 changed files with 174940 additions and 582 deletions
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299
Assets/BestHTTP/SecureProtocol/math/ec/custom/sec/SecP384R1Field.cs Normal file
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#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
using System;
using System.Diagnostics;
using Org.BouncyCastle.Math.Raw;
namespace Org.BouncyCastle.Math.EC.Custom.Sec
{
internal class SecP384R1Field
{
// 2^384 - 2^128 - 2^96 + 2^32 - 1
internal static readonly uint[] P = new uint[]{ 0xFFFFFFFF, 0x00000000, 0x00000000, 0xFFFFFFFF, 0xFFFFFFFE, 0xFFFFFFFF,
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF };
internal static readonly uint[] PExt = new uint[]{ 0x00000001, 0xFFFFFFFE, 0x00000000, 0x00000002, 0x00000000, 0xFFFFFFFE,
0x00000000, 0x00000002, 0x00000001, 0x00000000, 0x00000000, 0x00000000, 0xFFFFFFFE, 0x00000001, 0x00000000,
0xFFFFFFFE, 0xFFFFFFFD, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF };
private static readonly uint[] PExtInv = new uint[]{ 0xFFFFFFFF, 0x00000001, 0xFFFFFFFF, 0xFFFFFFFD, 0xFFFFFFFF, 0x00000001,
0xFFFFFFFF, 0xFFFFFFFD, 0xFFFFFFFE, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000001, 0xFFFFFFFE, 0xFFFFFFFF,
0x00000001, 0x00000002 };
private const uint P11 = 0xFFFFFFFF;
private const uint PExt23 = 0xFFFFFFFF;
public static void Add(uint[] x, uint[] y, uint[] z)
{
uint c = Nat.Add(12, x, y, z);
if (c != 0 || (z[11] == P11 && Nat.Gte(12, z, P)))
{
AddPInvTo(z);
}
}
public static void AddExt(uint[] xx, uint[] yy, uint[] zz)
{
uint c = Nat.Add(24, xx, yy, zz);
if (c != 0 || (zz[23] == PExt23 && Nat.Gte(24, zz, PExt)))
{
if (Nat.AddTo(PExtInv.Length, PExtInv, zz) != 0)
{
Nat.IncAt(24, zz, PExtInv.Length);
}
}
}
public static void AddOne(uint[] x, uint[] z)
{
uint c = Nat.Inc(12, x, z);
if (c != 0 || (z[11] == P11 && Nat.Gte(12, z, P)))
{
AddPInvTo(z);
}
}
public static uint[] FromBigInteger(BigInteger x)
{
uint[] z = Nat.FromBigInteger(384, x);
if (z[11] == P11 && Nat.Gte(12, z, P))
{
Nat.SubFrom(12, P, z);
}
return z;
}
public static void Half(uint[] x, uint[] z)
{
if ((x[0] & 1) == 0)
{
Nat.ShiftDownBit(12, x, 0, z);
}
else
{
uint c = Nat.Add(12, x, P, z);
Nat.ShiftDownBit(12, z, c);
}
}
public static void Multiply(uint[] x, uint[] y, uint[] z)
{
uint[] tt = Nat.Create(24);
Nat384.Mul(x, y, tt);
Reduce(tt, z);
}
public static void Negate(uint[] x, uint[] z)
{
if (Nat.IsZero(12, x))
{
Nat.Zero(12, z);
}
else
{
Nat.Sub(12, P, x, z);
}
}
public static void Reduce(uint[] xx, uint[] z)
{
long xx16 = xx[16], xx17 = xx[17], xx18 = xx[18], xx19 = xx[19];
long xx20 = xx[20], xx21 = xx[21], xx22 = xx[22], xx23 = xx[23];
const long n = 1;
long t0 = (long)xx[12] + xx20 - n;
long t1 = (long)xx[13] + xx22;
long t2 = (long)xx[14] + xx22 + xx23;
long t3 = (long)xx[15] + xx23;
long t4 = xx17 + xx21;
long t5 = xx21 - xx23;
long t6 = xx22 - xx23;
long t7 = t0 + t5;
long cc = 0;
cc += (long)xx[0] + t7;
z[0] = (uint)cc;
cc >>= 32;
cc += (long)xx[1] + xx23 - t0 + t1;
z[1] = (uint)cc;
cc >>= 32;
cc += (long)xx[2] - xx21 - t1 + t2;
z[2] = (uint)cc;
cc >>= 32;
cc += (long)xx[3] - t2 + t3 + t7;
z[3] = (uint)cc;
cc >>= 32;
cc += (long)xx[4] + xx16 + xx21 + t1 - t3 + t7;
z[4] = (uint)cc;
cc >>= 32;
cc += (long)xx[5] - xx16 + t1 + t2 + t4;
z[5] = (uint)cc;
cc >>= 32;
cc += (long)xx[6] + xx18 - xx17 + t2 + t3;
z[6] = (uint)cc;
cc >>= 32;
cc += (long)xx[7] + xx16 + xx19 - xx18 + t3;
z[7] = (uint)cc;
cc >>= 32;
cc += (long)xx[8] + xx16 + xx17 + xx20 - xx19;
z[8] = (uint)cc;
cc >>= 32;
cc += (long)xx[9] + xx18 - xx20 + t4;
z[9] = (uint)cc;
cc >>= 32;
cc += (long)xx[10] + xx18 + xx19 - t5 + t6;
z[10] = (uint)cc;
cc >>= 32;
cc += (long)xx[11] + xx19 + xx20 - t6;
z[11] = (uint)cc;
cc >>= 32;
cc += n;
Debug.Assert(cc >= 0);
Reduce32((uint)cc, z);
}
public static void Reduce32(uint x, uint[] z)
{
long cc = 0;
if (x != 0)
{
long xx12 = x;
cc += (long)z[0] + xx12;
z[0] = (uint)cc;
cc >>= 32;
cc += (long)z[1] - xx12;
z[1] = (uint)cc;
cc >>= 32;
if (cc != 0)
{
cc += (long)z[2];
z[2] = (uint)cc;
cc >>= 32;
}
cc += (long)z[3] + xx12;
z[3] = (uint)cc;
cc >>= 32;
cc += (long)z[4] + xx12;
z[4] = (uint)cc;
cc >>= 32;
Debug.Assert(cc == 0 || cc == 1);
}
if ((cc != 0 && Nat.IncAt(12, z, 5) != 0)
|| (z[11] == P11 && Nat.Gte(12, z, P)))
{
AddPInvTo(z);
}
}
public static void Square(uint[] x, uint[] z)
{
uint[] tt = Nat.Create(24);
Nat384.Square(x, tt);
Reduce(tt, z);
}
public static void SquareN(uint[] x, int n, uint[] z)
{
Debug.Assert(n > 0);
uint[] tt = Nat.Create(24);
Nat384.Square(x, tt);
Reduce(tt, z);
while (--n > 0)
{
Nat384.Square(z, tt);
Reduce(tt, z);
}
}
public static void Subtract(uint[] x, uint[] y, uint[] z)
{
int c = Nat.Sub(12, x, y, z);
if (c != 0)
{
SubPInvFrom(z);
}
}
public static void SubtractExt(uint[] xx, uint[] yy, uint[] zz)
{
int c = Nat.Sub(24, xx, yy, zz);
if (c != 0)
{
if (Nat.SubFrom(PExtInv.Length, PExtInv, zz) != 0)
{
Nat.DecAt(24, zz, PExtInv.Length);
}
}
}
public static void Twice(uint[] x, uint[] z)
{
uint c = Nat.ShiftUpBit(12, x, 0, z);
if (c != 0 || (z[11] == P11 && Nat.Gte(12, z, P)))
{
AddPInvTo(z);
}
}
private static void AddPInvTo(uint[] z)
{
long c = (long)z[0] + 1;
z[0] = (uint)c;
c >>= 32;
c += (long)z[1] - 1;
z[1] = (uint)c;
c >>= 32;
if (c != 0)
{
c += (long)z[2];
z[2] = (uint)c;
c >>= 32;
}
c += (long)z[3] + 1;
z[3] = (uint)c;
c >>= 32;
c += (long)z[4] + 1;
z[4] = (uint)c;
c >>= 32;
if (c != 0)
{
Nat.IncAt(12, z, 5);
}
}
private static void SubPInvFrom(uint[] z)
{
long c = (long)z[0] - 1;
z[0] = (uint)c;
c >>= 32;
c += (long)z[1] + 1;
z[1] = (uint)c;
c >>= 32;
if (c != 0)
{
c += (long)z[2];
z[2] = (uint)c;
c >>= 32;
}
c += (long)z[3] - 1;
z[3] = (uint)c;
c >>= 32;
c += (long)z[4] - 1;
z[4] = (uint)c;
c >>= 32;
if (c != 0)
{
Nat.DecAt(12, z, 5);
}
}
}
}
#endif