-
-
Notifications
You must be signed in to change notification settings - Fork 21
/
Copy pathGT4ReplayCrypto.cs
152 lines (140 loc) · 7.85 KB
/
GT4ReplayCrypto.cs
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
using System;
using System.Buffers.Binary;
using System.Collections.Generic;
using System.Text;
namespace PDTools.Crypto;
public class GT4ReplayCrypto
{
public const float Mult1 = 0.22973239f;
public const float Mult2 = 0.69584757f;
/// <summary>
/// Do not use. Does not work due to PS2 floats.
/// </summary>
/// <param name="encReplay"></param>
/// <returns></returns>
public static bool DecryptReplay(byte[] encReplay)
{
if (SharedCrypto.EncryptUnit_Decrypt(encReplay, encReplay.Length, 0, 0.22973239f, 0.69584757f, useMt: false, bigEndian: false, randomUpdateOld1_OldVersion: false) == -1)
return false;
// Read Serialize header
// Names are from GTHD 1668.elf (with asserts)
Span<byte> serializeHeader = encReplay.AsSpan(0x08);
int header_size = BinaryPrimitives.ReadInt32LittleEndian(serializeHeader);
uint data_size = BinaryPrimitives.ReadUInt32LittleEndian(serializeHeader.Slice(0x04));
int minor_version = BinaryPrimitives.ReadInt16LittleEndian(serializeHeader.Slice(0x08));
int major_version = BinaryPrimitives.ReadInt16LittleEndian(serializeHeader.Slice(0x0A)); // GT4: 4.0, GT4O: 5.0
uint encode_param = BinaryPrimitives.ReadUInt32LittleEndian(serializeHeader.Slice(0x0C)); // aka CRC
// _type_name[0] = v4 + 0x10
Span<byte> data = serializeHeader.Slice(header_size);
// NOTE: Data cannot be decoded. PS2 float fail - Might be intentional from PDI
// CRC32_PS2_Float(data, data, dataSize, encode_param);
return false;
}
/*
/// <summary>
/// THIS FUNCTION DOES NOT WORK - LOGIC IS CORRECT - BUT PS2 FLOATS PROBLEMS
/// </summary>
/// <param name="input"></param>
/// <param name="output"></param>
/// <param name="length"></param>
/// <param name="crc"></param>
public static void CRC32_PS2_Float(Span<byte> input, Span<byte> output, uint length, uint crc)
{
float currentFloat = BitConverter.Int32BitsToSingle((int)(crc & 0xFFFFFF | 0x3F000000));
for (var i = 0; i < length; i++)
{
int currentVal = BitConverter.SingleToInt32Bits(currentFloat);
byte inByte = input[i];
output[i] = (byte)(inByte ^ (currentVal >> 16 & 0xFF) ^ (currentVal >> 8 & 0xFF) ^ (currentVal & 0xFF));
currentFloat = (FloatTable[inByte] * currentFloat) / BitConverter.Int32BitsToSingle( (ShufTable[(byte)(currentVal & 0xFF)] << 16) | (ShufTable[(currentVal >> 8) & 0xFF] << 8) | (ShufTable[(currentVal >> 16) & 0xFF]) | 0x3F000000);
}
// CRC check should be here
}*/
private static readonly float[] FloatTable = /* new float[256] */
[
1.001955f, 1.0058651f, 1.0097752f, 1.0136852f, 1.0175953f,
1.0215054f, 1.0254154f, 1.0293255f, 1.0332355f, 1.0371456f,
1.0410557f, 1.0449657f, 1.0488758f, 1.0527859f, 1.0566959f,
1.060606f, 1.0645161f, 1.0684261f, 1.0723362f, 1.0762463f,
1.0801563f, 1.0840664f, 1.0879765f, 1.0918865f, 1.0957966f,
1.0997066f, 1.1036167f, 1.1075268f, 1.1114368f, 1.1153469f,
1.119257f, 1.123167f, 1.1270772f, 1.1309873f, 1.1348974f,
1.1388074f, 1.1427175f, 1.1466275f, 1.1505376f, 1.1544477f,
1.1583577f, 1.1622678f, 1.1661779f, 1.1700879f, 1.173998f,
1.1779081f, 1.1818181f, 1.1857282f, 1.1896383f, 1.1935483f,
1.1974584f, 1.2013685f, 1.2052785f, 1.2091886f, 1.2130986f,
1.2170087f, 1.2209188f, 1.2248288f, 1.2287389f, 1.232649f,
1.236559f, 1.2404691f, 1.2443792f, 1.2482892f, 1.2521994f,
1.2561095f, 1.2600195f, 1.2639296f, 1.2678397f, 1.2717497f,
1.2756598f, 1.2795699f, 1.2834799f, 1.28739f, 1.2913001f,
1.2952101f, 1.2991202f, 1.3030303f, 1.3069403f, 1.3108504f,
1.3147604f, 1.3186705f, 1.3225806f, 1.3264906f, 1.3304007f,
1.3343108f, 1.3382208f, 1.3421309f, 1.346041f, 1.349951f,
1.3538611f, 1.3577712f, 1.3616812f, 1.3655913f, 1.3695014f,
1.3734114f, 1.3773216f, 1.3812317f, 1.3851417f, 1.3890518f,
1.3929619f, 1.3968719f, 1.400782f, 1.4046921f, 1.4086021f,
1.4125122f, 1.4164222f, 1.4203323f, 1.4242424f, 1.4281524f,
1.4320625f, 1.4359726f, 1.4398826f, 1.4437927f, 1.4477028f,
1.4516128f, 1.4555229f, 1.459433f, 1.463343f, 1.4672531f,
1.4711632f, 1.4750732f, 1.4789833f, 1.4828933f, 1.4868034f,
1.4907135f, 1.4946235f, 1.4985336f, 1.5024438f, 1.5063539f,
1.5102639f, 1.514174f, 1.518084f, 1.5219941f, 1.5259042f,
1.5298142f, 1.5337243f, 1.5376344f, 1.5415444f, 1.5454545f,
1.5493646f, 1.5532746f, 1.5571847f, 1.5610948f, 1.5650048f,
1.5689149f, 1.572825f, 1.576735f, 1.5806451f, 1.5845551f,
1.5884652f, 1.5923753f, 1.5962853f, 1.6001954f, 1.6041055f,
1.6080155f, 1.6119256f, 1.6158357f, 1.6197457f, 1.6236558f,
1.627566f, 1.631476f, 1.6353861f, 1.6392962f, 1.6432062f,
1.6471163f, 1.6510264f, 1.6549364f, 1.6588465f, 1.6627566f,
1.6666666f, 1.6705767f, 1.6744868f, 1.6783968f, 1.6823069f,
1.686217f, 1.690127f, 1.6940371f, 1.6979471f, 1.7018572f,
1.7057673f, 1.7096773f, 1.7135874f, 1.7174975f, 1.7214075f,
1.7253176f, 1.7292277f, 1.7331377f, 1.7370478f, 1.7409579f,
1.7448679f, 1.748778f, 1.7526882f, 1.7565982f, 1.7605083f,
1.7644184f, 1.7683284f, 1.7722385f, 1.7761486f, 1.7800586f,
1.7839687f, 1.7878788f, 1.7917888f, 1.7956989f, 1.7996089f,
1.803519f, 1.8074291f, 1.8113391f, 1.8152492f, 1.8191593f,
1.8230693f, 1.8269794f, 1.8308895f, 1.8347995f, 1.8387096f,
1.8426197f, 1.8465297f, 1.8504398f, 1.8543499f, 1.8582599f,
1.86217f, 1.86608f, 1.8699901f, 1.8739002f, 1.8778104f,
1.8817204f, 1.8856305f, 1.8895406f, 1.8934506f, 1.8973607f,
1.9012707f, 1.9051808f, 1.9090909f, 1.9130009f, 1.916911f,
1.9208211f, 1.9247311f, 1.9286412f, 1.9325513f, 1.9364613f,
1.9403714f, 1.9442815f, 1.9481915f, 1.9521016f, 1.9560117f,
1.9599217f, 1.9638318f, 1.9677418f, 1.9716519f, 1.975562f,
1.979472f, 1.9833821f, 1.9872922f, 1.9912022f, 1.9951123f,
1.9990224f,
];
public static byte[] ShufTable = /* new byte[256] */
[
0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0, 0x10,
0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0, 0x08, 0x88,
0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8, 0x18, 0x98, 0x58,
0xD8, 0x38, 0xB8, 0x78, 0xF8, 0x04, 0x84, 0x44, 0xC4,
0x24, 0xA4, 0x64, 0xE4, 0x14, 0x94, 0x54, 0xD4, 0x34,
0xB4, 0x74, 0xF4, 0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC,
0x6C, 0xEC, 0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C,
0xFC, 0x02, 0x82, 0x42, 0xC2, 0x22, 0xA2, 0x62, 0xE2,
0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2, 0x72, 0xF2, 0x0A,
0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA, 0x1A, 0x9A,
0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA, 0x06, 0x86, 0x46,
0xC6, 0x26, 0xA6, 0x66, 0xE6, 0x16, 0x96, 0x56, 0xD6,
0x36, 0xB6, 0x76, 0xF6, 0x0E, 0x8E, 0x4E, 0xCE, 0x2E,
0xAE, 0x6E, 0xEE, 0x1E, 0x9E, 0x5E, 0xDE, 0x3E, 0xBE,
0x7E, 0xFE, 0x01, 0x81, 0x41, 0xC1, 0x21, 0xA1, 0x61,
0xE1, 0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1,
0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9, 0x19,
0x99, 0x59, 0xD9, 0x39, 0xB9, 0x79, 0xF9, 0x05, 0x85,
0x45, 0xC5, 0x25, 0xA5, 0x65, 0xE5, 0x15, 0x95, 0x55,
0xD5, 0x35, 0xB5, 0x75, 0xF5, 0x0D, 0x8D, 0x4D, 0xCD,
0x2D, 0xAD, 0x6D, 0xED, 0x1D, 0x9D, 0x5D, 0xDD, 0x3D,
0xBD, 0x7D, 0xFD, 0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3,
0x63, 0xE3, 0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73,
0xF3, 0x0B, 0x8B, 0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB,
0x1B, 0x9B, 0x5B, 0xDB, 0x3B, 0xBB, 0x7B, 0xFB, 0x07,
0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7, 0x17, 0x97,
0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7, 0x0F, 0x8F, 0x4F,
0xCF, 0x2F, 0xAF, 0x6F, 0xEF, 0x1F, 0x9F, 0x5F, 0xDF,
0x3F, 0xBF, 0x7F, 0xFF,
];
}