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baseline: OpenMU upstream b5a0961 (fresh source)

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Acentech Dev
2026-07-14 19:00:35 +03:00
parent 450402e47d
commit 36fc125d5c
11968 changed files with 748705 additions and 0 deletions
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192
src/Network/PacketTwister/PacketTwister42.cs Normal file
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// <copyright file="PacketTwister42.cs" company="MUnique">
// Licensed under the MIT License. See LICENSE file in the project root for full license information.
// </copyright>
namespace MUnique.OpenMU.Network.PacketTwister;
/// <summary>
/// PacketTwister implementation for packets of an unknown type.
/// </summary>
internal class PacketTwister42 : IPacketTwister
{
/// <inheritdoc/>
public void Twist(Span<byte> data)
{
if (data.Length >= 4)
{
if (data.Length >= 8)
{
if (data.Length >= 16)
{
if (data.Length >= 32)
{
var v8 = (byte)(data[8] >> 7);
data[8] *= 2;
data[8] |= v8;
var v9 = (byte)(data[10] >> 2);
data[10] <<= 6;
data[10] |= v9;
data[28] ^= 0xAE;
}
else
{
var v2 = (byte)((data[14] >> 2) & 1);
if (((data[14] >> 1) & 1) != 0)
{
data[14] |= 4;
}
else
{
data[14] &= 0xFB;
}
if (v2 != 0)
{
data[14] |= 2;
}
else
{
data[14] &= 0xFD;
}
data[4] ^= 0x40;
var v10 = (byte)((data[3] >> 2) & 1);
if (((data[3] >> 3) & 1) != 0)
{
data[3] |= 4;
}
else
{
data[3] &= 0xFB;
}
if (v10 != 0)
{
data[3] |= 8;
}
else
{
data[3] &= 0xF7;
}
data[0] ^= 0xC7;
var v7 = (byte)(data[4] >> 4);
data[4] *= 16;
data[4] |= v7;
}
}
else
{
var v4 = data[4];
data[4] = data[1];
data[1] = v4;
data[1] ^= 0x64;
var v5 = data[4];
data[4] = data[1];
data[1] = v5;
var v6 = (byte)(data[1] >> 5);
data[1] *= 8;
data[1] |= v6;
}
}
else
{
data[1] ^= 0x3C;
data[2] ^= 0x96;
var v3 = data[1];
data[1] = data[2];
data[2] = v3;
}
}
}
/// <inheritdoc/>
public void Correct(Span<byte> data)
{
if (data.Length >= 4)
{
if (data.Length >= 8)
{
if (data.Length >= 16)
{
if (data.Length >= 32)
{
data[28] ^= 0xAE;
var v8 = (byte)(data[10] >> 6);
data[10] *= 4;
data[10] |= v8;
var v9 = (byte)(data[8] >> 1);
data[8] <<= 7;
data[8] |= v9;
}
else
{
var v7 = (byte)(data[4] >> 4);
data[4] *= 16;
data[4] |= v7;
data[0] ^= 0xC7;
var v2 = (byte)((data[3] >> 2) & 1);
if (((data[3] >> 3) & 1) != 0)
{
data[3] |= 4;
}
else
{
data[3] &= 0xFB;
}
if (v2 != 0)
{
data[3] |= 8;
}
else
{
data[3] &= 0xF7;
}
data[4] ^= 0x40;
var v10 = (byte)((data[14] >> 2) & 1);
if (((data[14] >> 1) & 1) != 0)
{
data[14] |= 4;
}
else
{
data[14] &= 0xFB;
}
if (v10 != 0)
{
data[14] |= 2;
}
else
{
data[14] &= 0xFD;
}
}
}
else
{
var v4 = (byte)(data[1] >> 3);
data[1] *= 32;
data[1] |= v4;
var v5 = data[4];
data[4] = data[1];
data[1] = v5;
data[1] ^= 0x64;
var v6 = data[4];
data[4] = data[1];
data[1] = v6;
}
}
else
{
var v3 = data[1];
data[1] = data[2];
data[2] = v3;
data[2] ^= 0x96;
data[1] ^= 0x3C;
}
}
}
}