unsafe void DecryptV1(byte *data, int length, QlieEntry entry)
{
var file_name = entry.Name;
uint hash = 0x85F532;
uint seed = 0x33F641;
for (int i = 0; i < file_name.Length; i++)
{
hash += (uint)(file_name[i] << (i & 7));
seed ^= hash;
}
seed += ArcKey ^ (7 * ((uint)length & 0xFFFFFF) + (uint)length
+ hash + (hash ^ (uint)length ^ 0x8F32DCu));
seed = 9 * (seed & 0xFFFFFF);
var table = GenerateTable(0x20, seed); // originally 0x2C, 12 dwords not used
ulong *data64 = (ulong *)data;
int qword_length = length / 8;
uint k = 2 * (table[0xD] & 0xF);
ulong hash64 = table[6] | (ulong)table[7] << 32;
for (int i = 0; i < qword_length; ++i)
{
ulong t = table[k] | (ulong)table[k + 1] << 32;
hash64 = MMX.PAddD(hash64 ^ t, t);
ulong d = data64[i] ^ hash64;
data64[i] = d;
hash64 = MMX.PAddB(hash64, d) ^ d;
hash64 = MMX.PAddW(MMX.PSllD(hash64, 1), d);
k = (k + 2) & 0x1F;
}
}
public override void DecryptEntry(byte[] data, int offset, int length, QlieEntry entry)
{
if (offset < 0)
{
throw new ArgumentOutOfRangeException("offset");
}
if (length > data.Length || offset > data.Length - length)
{
throw new ArgumentOutOfRangeException("length");
}
uint arc_key = ArcKey;
ulong hash = 0xA73C5F9DA73C5F9Dul;
ulong xor = ((uint)length + arc_key) ^ 0xFEC9753Eu;
xor |= xor << 32;
unsafe
{
fixed(byte *raw = data)
{
ulong *encoded = (ulong *)(raw + offset);
for (int i = 0; i < length / 8; ++i)
{
hash = MMX.PAddD(hash, 0xCE24F523CE24F523ul) ^ xor;
xor = *encoded ^ hash;
*encoded++ = xor;
}
}
}
}
public override void DecryptEntry(byte[] data, int offset, int length, QlieEntry entry)
{
if (0 == entry.EncryptionMethod)
{
return;
}
if (offset < 0)
{
throw new ArgumentOutOfRangeException("offset");
}
if (length > data.Length || offset > data.Length - length)
{
throw new ArgumentOutOfRangeException("length");
}
if (length < 8)
{
return;
}
unsafe
{
fixed(byte *raw_data = &data[offset])
{
if (1 == entry.EncryptionMethod)
{
DecryptV1(raw_data, length, entry);
}
else
{
DecryptV2(raw_data, length, entry);
}
}
}
}
private byte[] ReadEntryBytes(ArcView file, QlieEntry entry, uint hash, byte[] game_key)
{
var data = new byte[entry.Size];
file.View.Read(entry.Offset, data, 0, entry.Size);
if (entry.IsEncrypted)
{
if (entry.KeyFile != null)
{
DecryptV3(data, 0, data.Length, entry.RawName, hash, entry.KeyFile, game_key);
}
else
{
Decrypt(data, 0, data.Length, hash);
}
}
if (entry.IsPacked)
{
var unpacked = Decompress(data);
if (null != unpacked)
{
data = unpacked;
}
}
return(data);
}
public override void DecryptEntry(byte[] data, int offset, int length, QlieEntry entry)
{
if (offset < 0)
{
throw new ArgumentOutOfRangeException("offset");
}
if (length > data.Length || offset > data.Length - length)
{
throw new ArgumentOutOfRangeException("length");
}
if (length < 8)
{
return;
}
var file_name = entry.Name;
uint hash = 0x85F532;
uint seed = 0x33F641;
for (int i = 0; i < file_name.Length; i++)
{
hash += (uint)(file_name[i] << (i & 7));
seed ^= hash;
}
seed += ArcKey ^ (7 * ((uint)length & 0xFFFFFF) + (uint)length
+ hash + (hash ^ (uint)length ^ 0x8F32DCu));
seed = 9 * (seed & 0xFFFFFF);
var table = GenerateTable(0x20, seed); // originally 0x2C, 12 dwords not used
unsafe
{
fixed(byte *raw_data = &data[offset])
{
ulong *data64 = (ulong *)raw_data;
int qword_length = length / 8;
uint k = 2 * (table[0xD] & 0xF);
ulong hash64 = table[6] | (ulong)table[7] << 32;
for (int i = 0; i < qword_length; ++i)
{
ulong t = table[k] | (ulong)table[k + 1] << 32;
hash64 = MMX.PAddD(hash64 ^ t, t);
ulong d = data64[i] ^ hash64;
data64[i] = d;
hash64 = MMX.PAddB(hash64, d) ^ d;
hash64 = MMX.PAddW(MMX.PSllD(hash64, 1), d);
k = (k + 2) & 0x1F;
}
}
}
}
private byte[] ReadEntryBytes(ArcView file, QlieEntry entry, IEncryption enc)
{
var data = file.View.ReadBytes(entry.Offset, entry.Size);
if (entry.IsEncrypted)
{
enc.DecryptEntry(data, 0, data.Length, entry);
}
if (entry.IsPacked)
{
data = Decompress(data) ?? data;
}
return(data);
}
unsafe void DecryptV2(byte *data, int length, QlieEntry entry)
{
var file_name = entry.Name;
uint hash = 0x86F7E2;
uint seed = 0x4437F1;
for (int i = 0; i < file_name.Length; i++)
{
hash += (uint)(file_name[i] << (i & 7));
seed ^= hash;
}
seed += ArcKey ^ (13 * ((uint)length & 0xFFFFFF) + (uint)length
+ hash + (hash ^ (uint)length ^ 0x56E213u));
seed = 13 * (seed & 0xFFFFFF);
var table = GenerateTable(0x20, seed, 0x8A77F473u); // originally 0x40
var key_data = GenerateKeyData(entry.KeyFile);
ulong *data64 = (ulong *)data;
int qword_length = length / 8;
int k = (8 * ((int)table[8] & 0xD)) & 0x7F;
ulong hash64 = table[6] | (ulong)table[7] << 32;
for (int i = 0; i < qword_length; ++i)
{
int t_index = 2 * (k & 0xF);
ulong t = table[t_index] | (ulong)table[t_index + 1] << 32;
t ^= LittleEndian.ToUInt64(key_data, 8 * k);
hash64 = MMX.PAddD(hash64 ^ t, t);
ulong d = data64[i] ^ hash64;
data64[i] = d;
hash64 = MMX.PAddB(hash64, d) ^ d;
hash64 = MMX.PAddW(MMX.PSllD(hash64, 1), d);
k = (k + 1) & 0x7F;
}
}
public abstract void DecryptEntry(byte[] data, int offset, int length, QlieEntry entry);
public override void DecryptEntry(byte[] data, int offset, int length, QlieEntry entry)
{
var key_file = entry.KeyFile;
if (null == key_file)
{
base.DecryptEntry(data, offset, length, entry);
return;
}
// play it safe with 'unsafe' sections
if (offset < 0)
{
throw new ArgumentOutOfRangeException("offset");
}
if (length > data.Length || offset > data.Length - length)
{
throw new ArgumentOutOfRangeException("length");
}
if (length < 8)
{
return;
}
var file_name = entry.RawName;
uint hash = 0x85F532;
uint seed = 0x33F641;
for (uint i = 0; i < file_name.Length; i++)
{
hash += (i & 0xFF) * file_name[i];
seed ^= hash;
}
seed += ArcKey ^ (7 * ((uint)length & 0xFFFFFF) + (uint)length
+ hash + (hash ^ (uint)length ^ 0x8F32DCu));
seed = 9 * (seed & 0xFFFFFF);
if (GameKeyData != null)
{
seed ^= 0x453A;
}
var mt = new QlieMersenneTwister(seed);
if (key_file != null)
{
mt.XorState(key_file);
}
if (GameKeyData != null)
{
mt.XorState(GameKeyData);
}
// game code fills dword[41] table, but only the first 16 qwords are used
ulong[] table = new ulong[16];
for (int i = 0; i < table.Length; ++i)
{
table[i] = mt.Rand64();
}
// compensate for 9 discarded dwords
for (int i = 0; i < 9; ++i)
{
mt.Rand();
}
ulong hash64 = mt.Rand64();
uint t = mt.Rand() & 0xF;
unsafe
{
fixed(byte *raw_data = &data[offset])
{
ulong *data64 = (ulong *)raw_data;
int qword_length = length / 8;
for (int i = 0; i < qword_length; ++i)
{
hash64 = MMX.PAddD(hash64 ^ table[t], table[t]);
ulong d = data64[i] ^ hash64;
data64[i] = d;
hash64 = MMX.PAddB(hash64, d) ^ d;
hash64 = MMX.PAddW(MMX.PSllD(hash64, 1), d);
t++;
t &= 0xF;
}
}
}
}
private byte[] ReadEntryBytes(ArcView file, QlieEntry entry, uint hash, byte[] game_key)
{
var data = file.View.ReadBytes (entry.Offset, entry.Size);
if (entry.IsEncrypted)
{
if (entry.KeyFile != null)
DecryptV3 (data, 0, data.Length, entry.RawName, hash, entry.KeyFile, game_key);
else
Decrypt (data, 0, data.Length, hash);
}
if (entry.IsPacked)
{
var unpacked = Decompress (data);
if (null != unpacked)
data = unpacked;
}
return data;
}