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implemented CPZ6 archives.

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morkt
2016-08-29 05:48:56 +04:00
parent 14f88049fc
commit f990fbb55e
3 changed files with 97 additions and 45 deletions
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114
ArcFormats/Cmvs/ArcCPZ.cs
View File

@@ -2,7 +2,7 @@
//! \date Tue Nov 24 11:27:23 2015 //! \date Tue Nov 24 11:27:23 2015
//! \brief Purple Software resource archive. //! \brief Purple Software resource archive.
// //
// Copyright (C) 2015 by morkt // Copyright (C) 2015-2016 by morkt
// //
// Permission is hereby granted, free of charge, to any person obtaining a copy // Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to // of this software and associated documentation files (the "Software"), to
@@ -36,18 +36,25 @@ namespace GameRes.Formats.Purple
[Serializable] [Serializable]
public class CmvsScheme public class CmvsScheme
{ {
public int Version;
public uint[] Cpz5Secret; public uint[] Cpz5Secret;
public Cmvs.Md5Variant Md5Variant; public Cmvs.Md5Variant Md5Variant;
public uint DecoderFactor; public uint DecoderFactor;
public uint EntryInitKey; public uint EntryInitKey;
public byte EntryTailKey; public byte EntryTailKey;
public byte EntryKeyPos = 9;
public uint IndexSeed = 0x2A65CB4E;
public uint IndexAddend = 0x784C5962;
public uint IndexSubtrahend = 0x79;
public uint[] DirKeyAddend = DefaultDirKeyAddend;
static readonly uint[] DefaultDirKeyAddend = { 0, 0x00112233, 0, 0x34258765 };
} }
internal class CpzEntry : Entry internal class CpzEntry : Entry
{ {
public uint CheckSum; public uint CheckSum;
public uint Key; public uint Key;
public uint DirKey;
} }
internal class CpzHeader internal class CpzHeader
@@ -58,7 +65,7 @@ namespace GameRes.Formats.Purple
public uint[] CmvsMd5 = new uint[4]; public uint[] CmvsMd5 = new uint[4];
public uint MasterKey; public uint MasterKey;
public bool IsEncrypted; public bool IsEncrypted;
public bool IsCompressed; public uint EntryKey;
} }
internal class CpzArchive : ArcFile internal class CpzArchive : ArcFile
@@ -89,6 +96,11 @@ namespace GameRes.Formats.Purple
public override bool IsHierarchic { get { return true; } } public override bool IsHierarchic { get { return true; } }
public override bool CanCreate { get { return false; } } public override bool CanCreate { get { return false; } }
public CpzOpener ()
{
Signatures = new uint[] { 0x355A5043, 0x365A5043 };
}
public static Dictionary<string, CmvsScheme> KnownSchemes = new Dictionary<string, CmvsScheme>(); public static Dictionary<string, CmvsScheme> KnownSchemes = new Dictionary<string, CmvsScheme>();
public override ResourceScheme Scheme public override ResourceScheme Scheme
@@ -105,21 +117,8 @@ namespace GameRes.Formats.Purple
var checksum = file.View.ReadUInt32 (0x3C); var checksum = file.View.ReadUInt32 (0x3C);
if (checksum != CheckSum (header, 0, 0x3C, 0x923A564Cu)) if (checksum != CheckSum (header, 0, 0x3C, 0x923A564Cu))
return null; return null;
var cpz = new CpzHeader int version = header[3] - '0';
{ CpzHeader cpz = 5 == version ? ReadHeaderV5 (header) : ReadHeaderV6 (header);
DirCount = -0x1C5AC27 ^ LittleEndian.ToInt32 (header, 4),
DirEntriesSize = 0x37F298E7 ^ LittleEndian.ToInt32 (header, 8),
FileEntriesSize = 0x7A6F3A2C ^ LittleEndian.ToInt32 (header, 0x0C),
MasterKey = 0xAE7D39BF ^ LittleEndian.ToUInt32 (header, 0x30),
IsEncrypted = 0 != (0xFB73A955 ^ LittleEndian.ToUInt32 (header, 0x34)),
IsCompressed = 0 != (0x37ACF831 ^ LittleEndian.ToUInt32 (header, 0x38)),
};
var cmvs_md5 = new uint[] {
0x43DE7C19 ^ LittleEndian.ToUInt32 (header, 0x20),
0xCC65F415 ^ LittleEndian.ToUInt32 (header, 0x24),
0xD016A93C ^ LittleEndian.ToUInt32 (header, 0x28),
0x97A3BA9A ^ LittleEndian.ToUInt32 (header, 0x2C),
};
int index_size = cpz.DirEntriesSize + cpz.FileEntriesSize; int index_size = cpz.DirEntriesSize + cpz.FileEntriesSize;
var index = file.View.ReadBytes (0x40, (uint)index_size); var index = file.View.ReadBytes (0x40, (uint)index_size);
if (index.Length != index_size) if (index.Length != index_size)
@@ -131,24 +130,63 @@ namespace GameRes.Formats.Purple
if (!header.Skip (0x10).Take (0x10).SequenceEqual (hash)) if (!header.Skip (0x10).Take (0x10).SequenceEqual (hash))
return null; return null;
} }
foreach (var scheme in KnownSchemes.Values) var cmvs_md5 = cpz.CmvsMd5.Clone() as uint[];
foreach (var scheme in KnownSchemes.Values.Where (s => s.Version == version))
{ {
// both CmvsMd5 and index will be altered by ReadIndex in decryption attempt
Array.Copy (cmvs_md5, cpz.CmvsMd5, 4);
var arc = ReadIndex (file, scheme, cpz, index); var arc = ReadIndex (file, scheme, cpz, index);
if (null != arc) if (null != arc)
return arc; return arc;
// both CmvsMd5 and index was altered by ReadIndex in decryption attempt
Array.Copy (cmvs_md5, cpz.CmvsMd5, 4);
file.View.Read (0x40, index, 0, (uint)index_size); file.View.Read (0x40, index, 0, (uint)index_size);
} }
throw new UnknownEncryptionScheme(); throw new UnknownEncryptionScheme();
} }
CpzHeader ReadHeaderV5 (byte[] header)
{
uint entry_key = 0x37ACF831 ^ LittleEndian.ToUInt32 (header, 0x38);
var cpz = new CpzHeader
{
DirCount = -0x1C5AC27 ^ LittleEndian.ToInt32 (header, 4),
DirEntriesSize = 0x37F298E7 ^ LittleEndian.ToInt32 (header, 8),
FileEntriesSize = 0x7A6F3A2C ^ LittleEndian.ToInt32 (header, 0x0C),
MasterKey = 0xAE7D39BF ^ LittleEndian.ToUInt32 (header, 0x30),
IsEncrypted = 0 != (0xFB73A955 ^ LittleEndian.ToUInt32 (header, 0x34)),
EntryKey = 0,
};
cpz.CmvsMd5[0] = 0x43DE7C19 ^ LittleEndian.ToUInt32 (header, 0x20);
cpz.CmvsMd5[1] = 0xCC65F415 ^ LittleEndian.ToUInt32 (header, 0x24);
cpz.CmvsMd5[2] = 0xD016A93C ^ LittleEndian.ToUInt32 (header, 0x28);
cpz.CmvsMd5[3] = 0x97A3BA9A ^ LittleEndian.ToUInt32 (header, 0x2C);
return cpz;
}
CpzHeader ReadHeaderV6 (byte[] header)
{
uint entry_key = 0x37ACF832 ^ LittleEndian.ToUInt32 (header, 0x38);
var cpz = new CpzHeader
{
DirCount = -0x1C5AC26 ^ LittleEndian.ToInt32 (header, 4),
DirEntriesSize = 0x37F298E8 ^ LittleEndian.ToInt32 (header, 8),
FileEntriesSize = 0x7A6F3A2D ^ LittleEndian.ToInt32 (header, 0x0C),
MasterKey = 0xAE7D39B7 ^ LittleEndian.ToUInt32 (header, 0x30),
IsEncrypted = 0 != (0xFB73A956 ^ LittleEndian.ToUInt32 (header, 0x34)),
EntryKey = 0x7DA8F173 * Binary.RotR (entry_key, 5) + 0x13712765,
};
cpz.CmvsMd5[0] = 0x43DE7C1A ^ LittleEndian.ToUInt32 (header, 0x20);
cpz.CmvsMd5[1] = 0xCC65F416 ^ LittleEndian.ToUInt32 (header, 0x24);
cpz.CmvsMd5[2] = 0xD016A93D ^ LittleEndian.ToUInt32 (header, 0x28);
cpz.CmvsMd5[3] = 0x97A3BA9B ^ LittleEndian.ToUInt32 (header, 0x2C);
return cpz;
}
ArcFile ReadIndex (ArcView file, CmvsScheme scheme, CpzHeader cpz, byte[] index) ArcFile ReadIndex (ArcView file, CmvsScheme scheme, CpzHeader cpz, byte[] index)
{ {
var cmvs_md5 = Cmvs.MD5.Create (scheme.Md5Variant); var cmvs_md5 = Cmvs.MD5.Create (scheme.Md5Variant);
cmvs_md5.Compute (cpz.CmvsMd5); cmvs_md5.Compute (cpz.CmvsMd5);
DecryptIndexStage1 (index, cpz.MasterKey ^ 0x3795B39A, scheme.Cpz5Secret); DecryptIndexStage1 (index, cpz.MasterKey ^ 0x3795B39A, scheme);
var decoder = new Cpz5Decoder (scheme, cpz.MasterKey, cpz.CmvsMd5[1]); var decoder = new Cpz5Decoder (scheme, cpz.MasterKey, cpz.CmvsMd5[1]);
decoder.Decode (index, 0, cpz.DirEntriesSize, 0x3A); decoder.Decode (index, 0, cpz.DirEntriesSize, 0x3A);
@@ -191,12 +229,10 @@ namespace GameRes.Formats.Purple
int cur_entries_end = cur_offset + cur_entries_size; int cur_entries_end = cur_offset + cur_entries_size;
decoder.Decode (index, cur_offset, cur_entries_size, 0x7E); decoder.Decode (index, cur_offset, cur_entries_size, 0x7E);
key[0] = cpz.CmvsMd5[0] ^ dir_key; for (int j = 0; j < 4; ++j)
key[1] = cpz.CmvsMd5[1] ^ (dir_key + 0x112233); key[j] = cpz.CmvsMd5[j] ^ (dir_key + scheme.DirKeyAddend[j]);
key[2] = cpz.CmvsMd5[2] ^ dir_key;
key[3] = cpz.CmvsMd5[3] ^ (dir_key + 0x34258765);
DecryptIndexEntry (index, cur_offset, cur_entries_size, key); DecryptIndexEntry (index, cur_offset, cur_entries_size, key, scheme.IndexSeed);
bool is_root_dir = dir_name == "root"; bool is_root_dir = dir_name == "root";
dir.Capacity = dir.Count + file_count; dir.Capacity = dir.Count + file_count;
@@ -212,8 +248,7 @@ namespace GameRes.Formats.Purple
entry.Offset = LittleEndian.ToInt64 (index, cur_offset+4) + base_offset; entry.Offset = LittleEndian.ToInt64 (index, cur_offset+4) + base_offset;
entry.Size = LittleEndian.ToUInt32 (index, cur_offset+0xC); entry.Size = LittleEndian.ToUInt32 (index, cur_offset+0xC);
entry.CheckSum = LittleEndian.ToUInt32 (index, cur_offset+0x10); entry.CheckSum = LittleEndian.ToUInt32 (index, cur_offset+0x10);
entry.Key = LittleEndian.ToUInt32 (index, cur_offset+0x14); entry.Key = LittleEndian.ToUInt32 (index, cur_offset+0x14) + dir_key;
entry.DirKey = dir_key;
if (!entry.CheckPlacement (file.MaxOffset)) if (!entry.CheckPlacement (file.MaxOffset))
return null; return null;
dir.Add (entry); dir.Add (entry);
@@ -236,7 +271,8 @@ namespace GameRes.Formats.Purple
var data = carc.File.View.ReadBytes (entry.Offset, entry.Size); var data = carc.File.View.ReadBytes (entry.Offset, entry.Size);
if (carc.Header.IsEncrypted) if (carc.Header.IsEncrypted)
{ {
uint key = (carc.Header.MasterKey ^ (cent.DirKey + cent.Key)) + (uint)carc.Header.DirCount - 0x5C29E87B; uint key = (carc.Header.MasterKey ^ cent.Key) + (uint)carc.Header.DirCount - 0x5C29E87B;
key ^= carc.Header.EntryKey;
carc.Decoder.DecryptEntry (data, carc.Header.CmvsMd5, key); carc.Decoder.DecryptEntry (data, carc.Header.CmvsMd5, key);
} }
if (data.Length > 0x30 && Binary.AsciiEqual (data, 0, "PS2A")) if (data.Length > 0x30 && Binary.AsciiEqual (data, 0, "PS2A"))
@@ -246,12 +282,13 @@ namespace GameRes.Formats.Purple
return new MemoryStream (data); return new MemoryStream (data);
} }
void DecryptIndexStage1 (byte[] data, uint key, uint[] secret) void DecryptIndexStage1 (byte[] data, uint key, CmvsScheme scheme)
{ {
var sectet_key = new uint[24]; var secret = scheme.Cpz5Secret;
var secret_key = new uint[24];
int secret_length = Math.Min (24, secret.Length); int secret_length = Math.Min (24, secret.Length);
for (int i = 0; i < secret_length; ++i) for (int i = 0; i < secret_length; ++i)
sectet_key[i] = secret[i] - key; secret_key[i] = secret[i] - key;
uint shift = key; uint shift = key;
shift = (shift >> 8) ^ key; shift = (shift >> 8) ^ key;
@@ -268,14 +305,14 @@ namespace GameRes.Formats.Purple
int i = 5; int i = 5;
for (int n = data.Length / 4; n > 0; --n) for (int n = data.Length / 4; n > 0; --n)
{ {
*data32 = Binary.RotR ((sectet_key[i] ^ *data32) + 0x784C5962, (int)shift) + 0x01010101; *data32 = Binary.RotR ((secret_key[i] ^ *data32) + scheme.IndexAddend, (int)shift) + 0x01010101;
++data32; ++data32;
i = (i + 1) % 24; i = (i + 1) % 24;
} }
byte* data8 = (byte*)data32; byte* data8 = (byte*)data32;
for (int n = data.Length & 3; n > 0; --n) for (int n = data.Length & 3; n > 0; --n)
{ {
*data8 = (byte)((*data8 ^ (sectet_key[i] >> (n * 4))) - 0x79); *data8 = (byte)((*data8 ^ (secret_key[i] >> (n * 4))) - scheme.IndexSubtrahend);
++data8; ++data8;
i = (i + 1) % 24; i = (i + 1) % 24;
} }
@@ -308,13 +345,12 @@ namespace GameRes.Formats.Purple
} }
} }
void DecryptIndexEntry (byte[] data, int offset, int length, uint[] key) void DecryptIndexEntry (byte[] data, int offset, int length, uint[] key, uint seed)
{ {
if (offset < 0 || offset > data.Length) if (offset < 0 || offset > data.Length)
throw new ArgumentOutOfRangeException ("offset"); throw new ArgumentOutOfRangeException ("offset");
if (length < 0 || length > data.Length || length > data.Length-offset) if (length < 0 || length > data.Length || length > data.Length-offset)
throw new ArgumentException ("length"); throw new ArgumentException ("length");
uint seed = 0x2A65CB4E;
unsafe unsafe
{ {
fixed (byte* raw = &data[offset]) fixed (byte* raw = &data[offset])
@@ -480,13 +516,13 @@ namespace GameRes.Formats.Purple
int secret_length = Math.Min (m_scheme.Cpz5Secret.Length, 0x10) * sizeof(uint); int secret_length = Math.Min (m_scheme.Cpz5Secret.Length, 0x10) * sizeof(uint);
byte[] key_bytes = new byte[secret_length]; byte[] key_bytes = new byte[secret_length];
uint[] secret_key = new uint[0x10];
uint key = cmvs_md5[1] >> 2; uint key = cmvs_md5[1] >> 2;
Buffer.BlockCopy (m_scheme.Cpz5Secret, 0, key_bytes, 0, secret_length); Buffer.BlockCopy (m_scheme.Cpz5Secret, 0, key_bytes, 0, secret_length);
for (int i = 0; i < secret_length; ++i) for (int i = 0; i < secret_length; ++i)
key_bytes[i] = (byte)(key ^ m_decode_table[key_bytes[i]]); key_bytes[i] = (byte)(key ^ m_decode_table[key_bytes[i]]);
uint[] secret_key = new uint[0x10];
Buffer.BlockCopy (key_bytes, 0, secret_key, 0, secret_length); Buffer.BlockCopy (key_bytes, 0, secret_key, 0, secret_length);
for (int i = 0; i < secret_key.Length; ++i) for (int i = 0; i < secret_key.Length; ++i)
secret_key[i] ^= seed; secret_key[i] ^= seed;
@@ -497,7 +533,7 @@ namespace GameRes.Formats.Purple
{ {
uint* data32 = (uint*)raw; uint* data32 = (uint*)raw;
key = m_scheme.EntryInitKey; key = m_scheme.EntryInitKey;
int k = 9; int k = m_scheme.EntryKeyPos;
for (int i = data.Length / 4; i > 0; --i) for (int i = data.Length / 4; i > 0; --i)
{ {
*data32 = cmvs_md5[key & 3] ^ ((*data32 ^ secret_key[(key >> 6) & 0xf] ^ (secret_key[k] >> 1)) - seed); *data32 = cmvs_md5[key & 3] ^ ((*data32 ^ secret_key[(key >> 6) & 0xf] ^ (secret_key[k] >> 1)) - seed);

24
ArcFormats/Cmvs/CmvsMD5.cs
View File

@@ -27,7 +27,7 @@ using GameRes.Utility;
namespace GameRes.Formats.Cmvs namespace GameRes.Formats.Cmvs
{ {
public enum Md5Variant { A, B } public enum Md5Variant { A, B, Chrono }
public abstract class MD5 : Cryptography.MD5Base public abstract class MD5 : Cryptography.MD5Base
{ {
@@ -38,10 +38,13 @@ namespace GameRes.Formats.Cmvs
static public MD5 Create (Md5Variant variant) static public MD5 Create (Md5Variant variant)
{ {
if (Md5Variant.A == variant) switch (variant)
return new Md5VariantA(); {
else case Md5Variant.A: return new Md5VariantA();
return new Md5VariantB(); case Md5Variant.B: return new Md5VariantB();
case Md5Variant.Chrono: return new Md5Chrono();
default: throw new System.ArgumentException ("Unknown MD5 variant", "variant");
}
} }
protected abstract void InitState (); protected abstract void InitState ();
@@ -79,6 +82,17 @@ namespace GameRes.Formats.Cmvs
} }
} }
public class Md5Chrono : Md5VariantA
{
protected override void SetResult (uint[] data)
{
data[0] = m_state[2] ^ 0x45A76C2F;
data[1] = m_state[1] - 0x5BA17FCB;
data[2] = m_state[0] ^ 0x79ABE8AD;
data[3] = m_state[3] - 0x1C08561B;
}
}
public class Md5VariantB : MD5 public class Md5VariantB : MD5
{ {
protected override void InitState () protected override void InitState ()

4
supported.html
View File

@@ -397,6 +397,7 @@ Otome Chibaku Yuugi <span class="footnote">ShiinaRio v2.40</span><br/>
Otome Juurin Yuugi <span class="footnote">ShiinaRio v2.37</span><br/> Otome Juurin Yuugi <span class="footnote">ShiinaRio v2.37</span><br/>
Ran→Sem <span class="footnote">ShiinaRio v2.47</span><br/> Ran→Sem <span class="footnote">ShiinaRio v2.47</span><br/>
Rin×Sen <span class="footnote">ShiinaRio v2.47</span><br/> Rin×Sen <span class="footnote">ShiinaRio v2.47</span><br/>
Sabae no Ou <span class="footnote">ShiinaRio v2.36</span><br/>
Shinigami no Testament <span class="footnote">ShiinaRio v2.49</span><br/> Shinigami no Testament <span class="footnote">ShiinaRio v2.49</span><br/>
Shojo Mama<span class="footnote">ShiinaRio v2.49</span><br/> Shojo Mama<span class="footnote">ShiinaRio v2.49</span><br/>
Tantei Shounen A<span class="footnote">some old version, like 2.twenty-something</span><br/> Tantei Shounen A<span class="footnote">some old version, like 2.twenty-something</span><br/>
@@ -819,7 +820,8 @@ Otto no Mae de Okasarete...<br/>
Gakuen Saimin Reido<br/> Gakuen Saimin Reido<br/>
</td></tr> </td></tr>
<tr class="odd"><td>*.akb</td><td><tt>AKB</tt></td><td>No</td></tr> <tr class="odd"><td>*.akb</td><td><tt>AKB</tt></td><td>No</td></tr>
<tr><td>*.cpz</td><td><tt>CPZ5</tt></td><td>No</td><td rowspan="2">CMVS</td><td rowspan="2"> <tr><td>*.cpz</td><td><tt>CPZ5</tt><br/><tt>CPZ6</tt></td><td>No</td><td rowspan="2">CMVS</td><td rowspan="2">
Chrono Clock<br/>
Hapymaher<br/> Hapymaher<br/>
Haruiro Ouse<br/> Haruiro Ouse<br/>
</td></tr> </td></tr>