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This commit is contained in:
stevesensei
2026-06-15 18:18:16 +08:00
parent 97c9fba14e
commit 2b9f134e5f
4164 changed files with 386922 additions and 79 deletions
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42
Packages/com.tivadar.best.http/Runtime/3rdParty/BouncyCastle/crypto/modes/gcm/BasicGcmExponentiator.cs vendored Normal file
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#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
#pragma warning disable
using System;
namespace Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto.Modes.Gcm
{
public class BasicGcmExponentiator
: IGcmExponentiator
{
private GcmUtilities.FieldElement x;
public void Init(byte[] x)
{
GcmUtilities.AsFieldElement(x, out this.x);
}
public void ExponentiateX(long pow, byte[] output)
{
GcmUtilities.FieldElement y;
GcmUtilities.One(out y);
if (pow > 0)
{
GcmUtilities.FieldElement powX = x;
do
{
if ((pow & 1L) != 0)
{
GcmUtilities.Multiply(ref y, ref powX);
}
GcmUtilities.Square(ref powX);
pow >>= 1;
}
while (pow > 0);
}
GcmUtilities.AsBytes(ref y, output);
}
}
}
#pragma warning restore
#endif

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Packages/com.tivadar.best.http/Runtime/3rdParty/BouncyCastle/crypto/modes/gcm/BasicGcmExponentiator.cs.meta vendored Normal file
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Packages/com.tivadar.best.http/Runtime/3rdParty/BouncyCastle/crypto/modes/gcm/BasicGcmMultiplier.cs vendored Normal file
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#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
#pragma warning disable
using System;
namespace Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto.Modes.Gcm
{
public class BasicGcmMultiplier
: IGcmMultiplier
{
private GcmUtilities.FieldElement H;
public void Init(byte[] H)
{
GcmUtilities.AsFieldElement(H, out this.H);
}
public void MultiplyH(byte[] x)
{
GcmUtilities.AsFieldElement(x, out var T);
GcmUtilities.Multiply(ref T, ref H);
GcmUtilities.AsBytes(ref T, x);
}
}
}
#pragma warning restore
#endif

11
Packages/com.tivadar.best.http/Runtime/3rdParty/BouncyCastle/crypto/modes/gcm/BasicGcmMultiplier.cs.meta vendored Normal file
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302
Packages/com.tivadar.best.http/Runtime/3rdParty/BouncyCastle/crypto/modes/gcm/GcmUtilities.cs vendored Normal file
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#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
#pragma warning disable
using System;
using System.Diagnostics;
#if NETSTANDARD1_0_OR_GREATER || NETCOREAPP1_0_OR_GREATER || UNITY_2021_2_OR_NEWER
using System.Runtime.CompilerServices;
#endif
#if NETCOREAPP3_0_OR_GREATER
using System.Runtime.Intrinsics;
using System.Runtime.Intrinsics.X86;
#endif
using Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto.Utilities;
using Best.HTTP.SecureProtocol.Org.BouncyCastle.Math.Raw;
using Best.HTTP.SecureProtocol.Org.BouncyCastle.Utilities;
namespace Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto.Modes.Gcm
{
internal abstract class GcmUtilities
{
internal struct FieldElement
{
internal ulong n0, n1;
}
private const uint E1 = 0xe1000000;
private const ulong E1UL = (ulong)E1 << 32;
internal static void One(out FieldElement x)
{
x.n0 = 1UL << 63;
x.n1 = 0UL;
}
#if NETSTANDARD1_0_OR_GREATER || NETCOREAPP1_0_OR_GREATER || UNITY_2021_2_OR_NEWER
[MethodImpl(MethodImplOptions.AggressiveInlining)]
#endif
internal static void AsBytes(ulong x0, ulong x1, byte[] z)
{
Pack.UInt64_To_BE(x0, z, 0);
Pack.UInt64_To_BE(x1, z, 8);
}
#if NETSTANDARD1_0_OR_GREATER || NETCOREAPP1_0_OR_GREATER || UNITY_2021_2_OR_NEWER
[MethodImpl(MethodImplOptions.AggressiveInlining)]
#endif
internal static void AsBytes(ref FieldElement x, byte[] z)
{
AsBytes(x.n0, x.n1, z);
}
#if NETSTANDARD1_0_OR_GREATER || NETCOREAPP1_0_OR_GREATER || UNITY_2021_2_OR_NEWER
[MethodImpl(MethodImplOptions.AggressiveInlining)]
#endif
internal static void AsFieldElement(byte[] x, out FieldElement z)
{
z.n0 = Pack.BE_To_UInt64(x, 0);
z.n1 = Pack.BE_To_UInt64(x, 8);
}
internal static void DivideP(ref FieldElement x, out FieldElement z)
{
ulong x0 = x.n0, x1 = x.n1;
ulong m = (ulong)((long)x0 >> 63);
x0 ^= (m & E1UL);
z.n0 = (x0 << 1) | (x1 >> 63);
z.n1 = (x1 << 1) | (ulong)(-(long)m);
}
internal static void Multiply(byte[] x, byte[] y)
{
AsFieldElement(x, out FieldElement X);
AsFieldElement(y, out FieldElement Y);
Multiply(ref X, ref Y);
AsBytes(ref X, x);
}
internal static void Multiply(ref FieldElement x, ref FieldElement y)
{
ulong z0, z1, z2, z3;
#if NETCOREAPP3_0_OR_GREATER
if (Pclmulqdq.IsSupported)
{
var X = Vector128.Create(x.n1, x.n0);
var Y = Vector128.Create(y.n1, y.n0);
var Z0 = Pclmulqdq.CarrylessMultiply(X, Y, 0x00);
var Z1 = Sse2.Xor(
Pclmulqdq.CarrylessMultiply(X, Y, 0x01),
Pclmulqdq.CarrylessMultiply(X, Y, 0x10));
var Z2 = Pclmulqdq.CarrylessMultiply(X, Y, 0x11);
ulong t3 = Z0.GetElement(0);
ulong t2 = Z0.GetElement(1) ^ Z1.GetElement(0);
ulong t1 = Z2.GetElement(0) ^ Z1.GetElement(1);
ulong t0 = Z2.GetElement(1);
z0 = (t0 << 1) | (t1 >> 63);
z1 = (t1 << 1) | (t2 >> 63);
z2 = (t2 << 1) | (t3 >> 63);
z3 = (t3 << 1);
}
else
#endif
{
/*
* "Three-way recursion" as described in "Batch binary Edwards", Daniel J. Bernstein.
*
* Without access to the high part of a 64x64 product x * y, we use a bit reversal to calculate it:
* rev(x) * rev(y) == rev((x * y) << 1)
*/
ulong x0 = x.n0, x1 = x.n1;
ulong y0 = y.n0, y1 = y.n1;
ulong x0r = Longs.Reverse(x0), x1r = Longs.Reverse(x1);
ulong y0r = Longs.Reverse(y0), y1r = Longs.Reverse(y1);
ulong h0 = Longs.Reverse(ImplMul64(x0r, y0r));
ulong h1 = ImplMul64(x0, y0) << 1;
ulong h2 = Longs.Reverse(ImplMul64(x1r, y1r));
ulong h3 = ImplMul64(x1, y1) << 1;
ulong h4 = Longs.Reverse(ImplMul64(x0r ^ x1r, y0r ^ y1r));
ulong h5 = ImplMul64(x0 ^ x1, y0 ^ y1) << 1;
z0 = h0;
z1 = h1 ^ h0 ^ h2 ^ h4;
z2 = h2 ^ h1 ^ h3 ^ h5;
z3 = h3;
}
Debug.Assert(z3 << 63 == 0);
z1 ^= z3 ^ (z3 >> 1) ^ (z3 >> 2) ^ (z3 >> 7);
// z2 ^= (z3 << 63) ^ (z3 << 62) ^ (z3 << 57);
z2 ^= (z3 << 62) ^ (z3 << 57);
z0 ^= z2 ^ (z2 >> 1) ^ (z2 >> 2) ^ (z2 >> 7);
z1 ^= (z2 << 63) ^ (z2 << 62) ^ (z2 << 57);
x.n0 = z0;
x.n1 = z1;
}
internal static void MultiplyP7(ref FieldElement x)
{
ulong x0 = x.n0, x1 = x.n1;
ulong c = x1 << 57;
x.n0 = (x0 >> 7) ^ c ^ (c >> 1) ^ (c >> 2) ^ (c >> 7);
x.n1 = (x1 >> 7) | (x0 << 57);
}
internal static void MultiplyP8(ref FieldElement x)
{
ulong x0 = x.n0, x1 = x.n1;
ulong c = x1 << 56;
x.n0 = (x0 >> 8) ^ c ^ (c >> 1) ^ (c >> 2) ^ (c >> 7);
x.n1 = (x1 >> 8) | (x0 << 56);
}
internal static void MultiplyP8(ref FieldElement x, out FieldElement y)
{
ulong x0 = x.n0, x1 = x.n1;
ulong c = x1 << 56;
y.n0 = (x0 >> 8) ^ c ^ (c >> 1) ^ (c >> 2) ^ (c >> 7);
y.n1 = (x1 >> 8) | (x0 << 56);
}
internal static void MultiplyP16(ref FieldElement x)
{
ulong x0 = x.n0, x1 = x.n1;
ulong c = x1 << 48;
x.n0 = (x0 >> 16) ^ c ^ (c >> 1) ^ (c >> 2) ^ (c >> 7);
x.n1 = (x1 >> 16) | (x0 << 48);
}
internal static void Square(ref FieldElement x)
{
ulong z1 = Interleave.Expand64To128Rev(x.n0, out ulong z0);
ulong z3 = Interleave.Expand64To128Rev(x.n1, out ulong z2);
Debug.Assert(z3 << 63 == 0);
z1 ^= z3 ^ (z3 >> 1) ^ (z3 >> 2) ^ (z3 >> 7);
// z2 ^= (z3 << 63) ^ (z3 << 62) ^ (z3 << 57);
z2 ^= (z3 << 62) ^ (z3 << 57);
Debug.Assert(z2 << 63 == 0);
z0 ^= z2 ^ (z2 >> 1) ^ (z2 >> 2) ^ (z2 >> 7);
// z1 ^= (z2 << 63) ^ (z2 << 62) ^ (z2 << 57);
z1 ^= (z2 << 62) ^ (z2 << 57);
x.n0 = z0;
x.n1 = z1;
}
internal static void Xor(byte[] x, byte[] y)
{
int i = 0;
do
{
x[i] ^= y[i]; ++i;
x[i] ^= y[i]; ++i;
x[i] ^= y[i]; ++i;
x[i] ^= y[i]; ++i;
}
while (i < 16);
}
internal static void Xor(byte[] x, byte[] y, int yOff)
{
int i = 0;
do
{
x[i] ^= y[yOff + i]; ++i;
x[i] ^= y[yOff + i]; ++i;
x[i] ^= y[yOff + i]; ++i;
x[i] ^= y[yOff + i]; ++i;
}
while (i < 16);
}
internal static void Xor(byte[] x, byte[] y, int yOff, int yLen)
{
while (--yLen >= 0)
{
x[yLen] ^= y[yOff + yLen];
}
}
internal static void Xor(byte[] x, int xOff, byte[] y, int yOff, int len)
{
while (--len >= 0)
{
x[xOff + len] ^= y[yOff + len];
}
}
internal static void Xor(ref FieldElement x, ref FieldElement y)
{
x.n0 ^= y.n0;
x.n1 ^= y.n1;
}
internal static void Xor(ref FieldElement x, ref FieldElement y, out FieldElement z)
{
z.n0 = x.n0 ^ y.n0;
z.n1 = x.n1 ^ y.n1;
}
#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER || UNITY_2021_2_OR_NEWER
internal static void Xor(Span<byte> x, ReadOnlySpan<byte> y)
{
int i = 0;
do
{
x[i] ^= y[i]; ++i;
x[i] ^= y[i]; ++i;
x[i] ^= y[i]; ++i;
x[i] ^= y[i]; ++i;
}
while (i < 16);
}
internal static void Xor(Span<byte> x, ReadOnlySpan<byte> y, int len)
{
for (int i = 0; i < len; ++i)
{
x[i] ^= y[i];
}
}
#endif
private static ulong ImplMul64(ulong x, ulong y)
{
ulong x0 = x & 0x1111111111111111UL;
ulong x1 = x & 0x2222222222222222UL;
ulong x2 = x & 0x4444444444444444UL;
ulong x3 = x & 0x8888888888888888UL;
ulong y0 = y & 0x1111111111111111UL;
ulong y1 = y & 0x2222222222222222UL;
ulong y2 = y & 0x4444444444444444UL;
ulong y3 = y & 0x8888888888888888UL;
ulong z0 = (x0 * y0) ^ (x1 * y3) ^ (x2 * y2) ^ (x3 * y1);
ulong z1 = (x0 * y1) ^ (x1 * y0) ^ (x2 * y3) ^ (x3 * y2);
ulong z2 = (x0 * y2) ^ (x1 * y1) ^ (x2 * y0) ^ (x3 * y3);
ulong z3 = (x0 * y3) ^ (x1 * y2) ^ (x2 * y1) ^ (x3 * y0);
z0 &= 0x1111111111111111UL;
z1 &= 0x2222222222222222UL;
z2 &= 0x4444444444444444UL;
z3 &= 0x8888888888888888UL;
return z0 | z1 | z2 | z3;
}
}
}
#pragma warning restore
#endif

11
Packages/com.tivadar.best.http/Runtime/3rdParty/BouncyCastle/crypto/modes/gcm/GcmUtilities.cs.meta vendored Normal file
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14
Packages/com.tivadar.best.http/Runtime/3rdParty/BouncyCastle/crypto/modes/gcm/IGcmExponentiator.cs vendored Normal file
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#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
#pragma warning disable
using System;
namespace Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto.Modes.Gcm
{
public interface IGcmExponentiator
{
void Init(byte[] x);
void ExponentiateX(long pow, byte[] output);
}
}
#pragma warning restore
#endif

11
Packages/com.tivadar.best.http/Runtime/3rdParty/BouncyCastle/crypto/modes/gcm/IGcmExponentiator.cs.meta vendored Normal file
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14
Packages/com.tivadar.best.http/Runtime/3rdParty/BouncyCastle/crypto/modes/gcm/IGcmMultiplier.cs vendored Normal file
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#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
#pragma warning disable
using System;
namespace Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto.Modes.Gcm
{
public interface IGcmMultiplier
{
void Init(byte[] H);
void MultiplyH(byte[] x);
}
}
#pragma warning restore
#endif

11
Packages/com.tivadar.best.http/Runtime/3rdParty/BouncyCastle/crypto/modes/gcm/IGcmMultiplier.cs.meta vendored Normal file
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63
Packages/com.tivadar.best.http/Runtime/3rdParty/BouncyCastle/crypto/modes/gcm/Tables1kGcmExponentiator.cs vendored Normal file
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#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
#pragma warning disable
using System;
using System.Collections.Generic;
namespace Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto.Modes.Gcm
{
public class Tables1kGcmExponentiator
: IGcmExponentiator
{
// A lookup table of the power-of-two powers of 'x'
// - lookupPowX2[i] = x^(2^i)
private IList<GcmUtilities.FieldElement> lookupPowX2;
public void Init(byte[] x)
{
GcmUtilities.FieldElement y;
GcmUtilities.AsFieldElement(x, out y);
if (lookupPowX2 != null && y.Equals(lookupPowX2[0]))
return;
lookupPowX2 = new List<GcmUtilities.FieldElement>(8);
lookupPowX2.Add(y);
}
public void ExponentiateX(long pow, byte[] output)
{
GcmUtilities.FieldElement y;
GcmUtilities.One(out y);
int bit = 0;
while (pow > 0)
{
if ((pow & 1L) != 0)
{
EnsureAvailable(bit);
GcmUtilities.FieldElement powX2 = (GcmUtilities.FieldElement)lookupPowX2[bit];
GcmUtilities.Multiply(ref y, ref powX2);
}
++bit;
pow >>= 1;
}
GcmUtilities.AsBytes(ref y, output);
}
private void EnsureAvailable(int bit)
{
int count = lookupPowX2.Count;
if (count <= bit)
{
GcmUtilities.FieldElement powX2 = (GcmUtilities.FieldElement)lookupPowX2[count - 1];
do
{
GcmUtilities.Square(ref powX2);
lookupPowX2.Add(powX2);
}
while (++count <= bit);
}
}
}
}
#pragma warning restore
#endif

11
Packages/com.tivadar.best.http/Runtime/3rdParty/BouncyCastle/crypto/modes/gcm/Tables1kGcmExponentiator.cs.meta vendored Normal file
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72
Packages/com.tivadar.best.http/Runtime/3rdParty/BouncyCastle/crypto/modes/gcm/Tables4kGcmMultiplier.cs vendored Normal file
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#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
#pragma warning disable
using System;
using Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto.Utilities;
using Best.HTTP.SecureProtocol.Org.BouncyCastle.Utilities;
namespace Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto.Modes.Gcm
{
public class Tables4kGcmMultiplier
: IGcmMultiplier
{
private byte[] H;
private GcmUtilities.FieldElement[] T;
public void Init(byte[] H)
{
if (T == null)
{
T = new GcmUtilities.FieldElement[256];
}
else if (Arrays.AreEqual(this.H, H))
{
return;
}
this.H = Arrays.Clone(H);
// T[0] = 0
// T[1] = H.p^7
GcmUtilities.AsFieldElement(this.H, out T[1]);
GcmUtilities.MultiplyP7(ref T[1]);
for (int n = 1; n < 128; ++n)
{
// T[2.n] = T[n].p^-1
GcmUtilities.DivideP(ref T[n], out T[n << 1]);
// T[2.n + 1] = T[2.n] + T[1]
GcmUtilities.Xor(ref T[n << 1], ref T[1], out T[(n << 1) + 1]);
}
}
public void MultiplyH(byte[] x)
{
//GcmUtilities.FieldElement z = T[x[15]];
//for (int i = 14; i >= 0; --i)
//{
// GcmUtilities.MultiplyP8(ref z);
// GcmUtilities.Xor(ref z, ref T[x[i]]);
//}
//GcmUtilities.AsBytes(ref z, x);
int pos = x[15];
ulong z0 = T[pos].n0, z1 = T[pos].n1;
for (int i = 14; i >= 0; --i)
{
pos = x[i];
ulong c = z1 << 56;
z1 = T[pos].n1 ^ ((z1 >> 8) | (z0 << 56));
z0 = T[pos].n0 ^ (z0 >> 8) ^ c ^ (c >> 1) ^ (c >> 2) ^ (c >> 7);
}
GcmUtilities.AsBytes(z0, z1, x);
}
}
}
#pragma warning restore
#endif

11
Packages/com.tivadar.best.http/Runtime/3rdParty/BouncyCastle/crypto/modes/gcm/Tables4kGcmMultiplier.cs.meta vendored Normal file
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Packages/com.tivadar.best.http/Runtime/3rdParty/BouncyCastle/crypto/modes/gcm/Tables64kGcmMultiplier.cs vendored Normal file
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#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
#pragma warning disable
using System;
using Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto.Utilities;
using Best.HTTP.SecureProtocol.Org.BouncyCastle.Utilities;
namespace Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto.Modes.Gcm
{
public class Tables64kGcmMultiplier
: IGcmMultiplier
{
private byte[] H;
private GcmUtilities.FieldElement[][] T;
public void Init(byte[] H)
{
if (T == null)
{
T = new GcmUtilities.FieldElement[16][];
}
else if (Arrays.AreEqual(this.H, H))
{
return;
}
this.H = Arrays.Clone(H);
for (int i = 0; i < 16; ++i)
{
GcmUtilities.FieldElement[] t = T[i] = new GcmUtilities.FieldElement[256];
// t[0] = 0
if (i == 0)
{
// t[1] = H.p^7
GcmUtilities.AsFieldElement(this.H, out t[1]);
GcmUtilities.MultiplyP7(ref t[1]);
}
else
{
// t[1] = T[i-1][1].p^8
GcmUtilities.MultiplyP8(ref T[i - 1][1], out t[1]);
}
for (int n = 1; n < 128; ++n)
{
// t[2.n] = t[n].p^-1
GcmUtilities.DivideP(ref t[n], out t[n << 1]);
// t[2.n + 1] = t[2.n] + t[1]
GcmUtilities.Xor(ref t[n << 1], ref t[1], out t[(n << 1) + 1]);
}
}
}
public void MultiplyH(byte[] x)
{
//GcmUtilities.FieldElement z = T[15][x[15]];
//for (int i = 14; i >= 0; --i)
//{
// GcmUtilities.Xor(ref z, ref T[i][x[i]]);
//}
//GcmUtilities.AsBytes(ref z, x);
GcmUtilities.FieldElement[] t = T[15];
int tPos = x[15];
ulong z0 = t[tPos].n0, z1 = t[tPos].n1;
for (int i = 14; i >= 0; --i)
{
t = T[i];
tPos = x[i];
z0 ^= t[tPos].n0;
z1 ^= t[tPos].n1;
}
GcmUtilities.AsBytes(z0, z1, x);
}
}
}
#pragma warning restore
#endif

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Packages/com.tivadar.best.http/Runtime/3rdParty/BouncyCastle/crypto/modes/gcm/Tables64kGcmMultiplier.cs.meta vendored Normal file
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Packages/com.tivadar.best.http/Runtime/3rdParty/BouncyCastle/crypto/modes/gcm/Tables8kGcmMultiplier.cs vendored Normal file
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#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
#pragma warning disable
using System;
using Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto.Utilities;
using Best.HTTP.SecureProtocol.Org.BouncyCastle.Utilities;
namespace Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto.Modes.Gcm
{
public sealed class Tables8kGcmMultiplier
: IGcmMultiplier
{
private byte[] H;
private GcmUtilities.FieldElement[][] T;
public void Init(byte[] H)
{
if (T == null)
{
T = new GcmUtilities.FieldElement[2][];
}
else if (Arrays.AreEqual(this.H, H))
{
return;
}
this.H = Arrays.Clone(H);
for (int i = 0; i < 2; ++i)
{
GcmUtilities.FieldElement[] t = T[i] = new GcmUtilities.FieldElement[256];
// t[0] = 0
if (i == 0)
{
// t[1] = H.p^7
GcmUtilities.AsFieldElement(this.H, out t[1]);
GcmUtilities.MultiplyP7(ref t[1]);
}
else
{
// t[1] = T[i-1][1].p^8
GcmUtilities.MultiplyP8(ref T[i - 1][1], out t[1]);
}
for (int n = 1; n < 128; ++n)
{
// t[2.n] = t[n].p^-1
GcmUtilities.DivideP(ref t[n], out t[n << 1]);
// t[2.n + 1] = t[2.n] + t[1]
GcmUtilities.Xor(ref t[n << 1], ref t[1], out t[(n << 1) + 1]);
}
}
}
uint[] z = new uint[4];
public void MultiplyH(byte[] x)
{
GcmUtilities.FieldElement[] T0 = T[0], T1 = T[1];
//GcmUtilities.FieldElement z;
//GcmUtilities.Xor(ref T0[x[14]], ref T1[x[15]], out z);
//for (int i = 12; i >= 0; i -= 2)
//{
// GcmUtilities.MultiplyP16(ref z);
// GcmUtilities.Xor(ref z, ref T0[x[i]]);
// GcmUtilities.Xor(ref z, ref T1[x[i + 1]]);
//}
//GcmUtilities.AsBytes(ref z, x);
int vPos = x[15];
int uPos = x[14];
ulong z1 = T0[uPos].n1 ^ T1[vPos].n1;
ulong z0 = T0[uPos].n0 ^ T1[vPos].n0;
for (int i = 12; i >= 0; i -= 2)
{
vPos = x[i + 1];
uPos = x[i];
ulong c = z1 << 48;
z1 = T0[uPos].n1 ^ T1[vPos].n1 ^ ((z1 >> 16) | (z0 << 48));
z0 = T0[uPos].n0 ^ T1[vPos].n0 ^ (z0 >> 16) ^ c ^ (c >> 1) ^ (c >> 2) ^ (c >> 7);
}
GcmUtilities.AsBytes(z0, z1, x);
}
}
}
#pragma warning restore
#endif

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