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more XP3 encryption schemes.

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This commit is contained in:
morkt 2016-03-04 07:02:53 +04:00
parent 1ef4c2f58f
commit 9020219476
1 changed files with 73 additions and 14 deletions
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87
ArcFormats/KiriKiri/CryptAlgorithms.cs
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@ -24,6 +24,7 @@
//
using System;
using GameRes.Utility;
namespace GameRes.Formats.KiriKiri
{
@ -170,24 +171,22 @@ namespace GameRes.Formats.KiriKiri
}
[Serializable]
public class SwanSongCrypt : ICrypt
public class FlyingShineCrypt : ICrypt
{
static private byte Adjust (uint hash, out int shift)
{
int cl = (int)(hash & 0xff);
if (0 == cl) cl = 0x0f;
shift = cl & 7;
int ch = (int)((hash >> 8) & 0xff);
if (0 == ch) ch = 0xf0;
return (byte)ch;
shift = (int)(hash & 0xff);
if (0 == shift) shift = 0x0f;
byte key = (byte)(hash >> 8);
if (0 == key) key = 0xf0;
return key;
}
public override byte Decrypt (Xp3Entry entry, long offset, byte value)
{
int shift;
byte xor = Adjust (entry.Hash, out shift);
uint data = (uint)(value ^ xor);
return (byte)((data >> shift) | (data << (8 - shift)));
return Binary.RotByteR ((byte)(value ^ xor), shift);
}
public override void Decrypt (Xp3Entry entry, long offset, byte[] values, int pos, int count)
@ -196,8 +195,8 @@ namespace GameRes.Formats.KiriKiri
byte xor = Adjust (entry.Hash, out shift);
for (int i = 0; i < count; ++i)
{
uint data = (uint)(values[pos+i] ^ xor);
values[pos+i] = (byte)((data >> shift) | (data << (8 - shift)));
byte data = (byte)(values[pos+i] ^ xor);
values[pos+i] = Binary.RotByteR (data, shift);
}
}
@ -207,8 +206,7 @@ namespace GameRes.Formats.KiriKiri
byte xor = Adjust (entry.Hash, out shift);
for (int i = 0; i < count; ++i)
{
uint data = values[pos+i];
data = (byte)((data << shift) | (data >> (8 - shift)));
byte data = Binary.RotByteL (values[pos+i], shift);
values[pos+i] = (byte)(data ^ xor);
}
}
@ -336,7 +334,7 @@ namespace GameRes.Formats.KiriKiri
}
[Serializable]
public class SaiminCrypt : ICrypt
public class DieselmineCrypt : ICrypt
{
public override byte Decrypt (Xp3Entry entry, long offset, byte value)
{
@ -527,4 +525,65 @@ namespace GameRes.Formats.KiriKiri
Decrypt (entry, offset, values, pos, count);
}
}
[Serializable]
public class AppliqueCrypt : ICrypt
{
public override byte Decrypt (Xp3Entry entry, long offset, byte value)
{
return (byte)(value ^ (entry.Hash >> 12));
}
public override void Decrypt (Xp3Entry entry, long offset, byte[] values, int pos, int count)
{
byte key = (byte)(entry.Hash >> 12);
for (int i = 0; i < count; ++i)
{
values[pos+i] ^= key;
}
}
public override void Encrypt (Xp3Entry entry, long offset, byte[] values, int pos, int count)
{
Decrypt (entry, offset, values, pos, count);
}
}
[Serializable]
public class TokidokiCrypt : ICrypt
{
public override bool HashAfterCrypt { get { return true; } }
public override void Decrypt (Xp3Entry entry, long offset, byte[] values, int pos, int count)
{
uint key;
uint limit = GetParameters (entry, out key);
for (int i = 0; i < count && offset < limit; ++i, ++offset)
{
values[pos+i] ^= (byte)(key >> (((int)offset & 3) << 3));
}
}
public override void Encrypt (Xp3Entry entry, long offset, byte[] values, int pos, int count)
{
Decrypt (entry, offset, values, pos, count);
}
uint GetParameters (Xp3Entry entry, out uint key)
{
var ext = System.IO.Path.GetExtension (entry.Name);
if (!string.IsNullOrEmpty (ext))
{
ext = ext.ToLowerInvariant();
var ext_bin = new byte[16];
Encodings.cp932.GetBytes (ext, 0, Math.Min (4, ext.Length), ext_bin, 0);
key = ~LittleEndian.ToUInt32 (ext_bin, 0);
if (".asd.ks.tjs".Contains (ext))
return entry.Size;
}
else
key = uint.MaxValue;
return Math.Min (entry.Size, 0x100u);
}
}
}