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Fix Endfield

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This commit is contained in:
Maverick Chang
2025-02-17 14:30:24 +09:00
parent dbf3a8f16a
commit 8446538322
17 changed files with 481 additions and 157 deletions
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13
AssetStudio/Crypto/FairGuardUtils.cs
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@@ -11,11 +11,11 @@ namespace AssetStudio
Logger.Verbose($"Attempting to decrypt block with FairGuard encryption...");
var encryptedOffset = 0;
var encryptedSize = bytes.Length > 0x500 ? 0x500 : bytes.Length;
var encryptedSize = Math.Min(0x500, bytes.Length);
if (encryptedSize < 0x20)
{
Logger.Verbose($"block size is less that minimum, skipping...");
Logger.Verbose("block size is less that minimum, skipping...");
return;
}
@@ -27,11 +27,20 @@ namespace AssetStudio
encrypted[i] ^= 0xA6;
}
// old
/*
var seedPart0 = (uint)(encryptedInts[2] ^ 0x1274CBEC ^ encryptedInts[6] ^ 0x3F72EAF3);
var seedPart1 = (uint)(encryptedInts[3] ^ 0xBE482704 ^ encryptedInts[0] ^ encryptedSize);
var seedPart2 = (uint)(encryptedInts[1] ^ encryptedSize ^ encryptedInts[5] ^ 0x753BDCAA);
var seedPart3 = (uint)(encryptedInts[0] ^ 0x82C57E3C ^ encryptedInts[7] ^ 0xE3D947D3);
var seedPart4 = (uint)(encryptedInts[4] ^ 0x6F2A7347 ^ encryptedInts[7] ^ 0x4736C714);
*/
var seedPart0 = (uint)(encryptedInts[2] ^ encryptedInts[6] ^ 0x226a61b9);
var seedPart1 = (uint)(encryptedInts[3] ^ encryptedInts[0] ^ 0x7a39d018 ^ encryptedSize);
var seedPart2 = (uint)(encryptedInts[1] ^ encryptedInts[5] ^ 0x18f6d8aa ^ encryptedSize);
var seedPart3 = (uint)(encryptedInts[0] ^ encryptedInts[7] ^ 0xaa255fb1);
var seedPart4 = (uint)(encryptedInts[4] ^ encryptedInts[7] ^ 0xf78dd8eb);
var seedInts = new uint[] { seedPart0, seedPart1, seedPart2, seedPart3, seedPart4 };
var seedBytes = MemoryMarshal.AsBytes<uint>(seedInts);