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- [Core] fix bug with certain files [GI]

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This commit is contained in:
Razmoth
2024-02-03 17:27:38 +04:00
parent c5870c9328
commit 50e0af05b2
1 changed files with 5 additions and 5 deletions
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10
AssetStudio/MhyFile.cs
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@@ -193,23 +193,23 @@ namespace AssetStudio
private void DescrambleChunk(Span<byte> input)
{
byte[] vector = new byte[0x10];
byte[] vector = new byte[input.Length];
for (int i = 0; i < 3; i++)
{
for (int j = 0; j < 0x10; j++)
for (int j = 0; j < input.Length; j++)
{
int k = mhy.MhyShiftRow[(2 - i) * 0x10 + j];
int idx = j % 8;
vector[j] = (byte)(mhy.MhyKey[idx] ^ mhy.SBox[(j % 4 * 0x100) | GF256Mul(mhy.MhyMul[idx], input[k])]);
vector[j] = (byte)(mhy.MhyKey[idx] ^ mhy.SBox[(j % 4 * 0x100) | GF256Mul(mhy.MhyMul[idx], input[k % input.Length])]);
}
vector.CopyTo(input);
vector.AsSpan(0, input.Length).CopyTo(input);
}
}
private void Descramble(Span<byte> input, int blockSize, int entrySize)
{
var roundedEntrySize = (entrySize + 0xF) / 0x10 * 0x10;
for (int i = 0; i < roundedEntrySize; i += 0x10)
DescrambleChunk(input.Slice(i + 4, 0x10));
DescrambleChunk(input.Slice(i + 4, Math.Min(input.Length - 4, 0x10)));
for (int i = 0; i < 4; i++)
input[i] ^= input[i + 4];