mirror of
https://github.com/crskycode/GARbro.git
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implemented CPZ6 archives.
This commit is contained in:
morkt
parent
14f88049fc
commit
f990fbb55e
@ -2,7 +2,7 @@
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//! \date Tue Nov 24 11:27:23 2015
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//! \brief Purple Software resource archive.
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//
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// Copyright (C) 2015 by morkt
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// Copyright (C) 2015-2016 by morkt
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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@ -36,18 +36,25 @@ namespace GameRes.Formats.Purple
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[Serializable]
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public class CmvsScheme
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{
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public int Version;
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public uint[] Cpz5Secret;
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public Cmvs.Md5Variant Md5Variant;
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public uint DecoderFactor;
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public uint EntryInitKey;
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public byte EntryTailKey;
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public byte EntryKeyPos = 9;
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public uint IndexSeed = 0x2A65CB4E;
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public uint IndexAddend = 0x784C5962;
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public uint IndexSubtrahend = 0x79;
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public uint[] DirKeyAddend = DefaultDirKeyAddend;
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static readonly uint[] DefaultDirKeyAddend = { 0, 0x00112233, 0, 0x34258765 };
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}
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internal class CpzEntry : Entry
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{
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public uint CheckSum;
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public uint Key;
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public uint DirKey;
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}
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internal class CpzHeader
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@ -58,7 +65,7 @@ namespace GameRes.Formats.Purple
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public uint[] CmvsMd5 = new uint[4];
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public uint MasterKey;
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public bool IsEncrypted;
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public bool IsCompressed;
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public uint EntryKey;
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}
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internal class CpzArchive : ArcFile
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@ -89,6 +96,11 @@ namespace GameRes.Formats.Purple
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public override bool IsHierarchic { get { return true; } }
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public override bool CanCreate { get { return false; } }
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public CpzOpener ()
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{
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Signatures = new uint[] { 0x355A5043, 0x365A5043 };
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}
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public static Dictionary<string, CmvsScheme> KnownSchemes = new Dictionary<string, CmvsScheme>();
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public override ResourceScheme Scheme
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@ -105,21 +117,8 @@ namespace GameRes.Formats.Purple
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var checksum = file.View.ReadUInt32 (0x3C);
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if (checksum != CheckSum (header, 0, 0x3C, 0x923A564Cu))
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return null;
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var cpz = new CpzHeader
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{
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DirCount = -0x1C5AC27 ^ LittleEndian.ToInt32 (header, 4),
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DirEntriesSize = 0x37F298E7 ^ LittleEndian.ToInt32 (header, 8),
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FileEntriesSize = 0x7A6F3A2C ^ LittleEndian.ToInt32 (header, 0x0C),
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MasterKey = 0xAE7D39BF ^ LittleEndian.ToUInt32 (header, 0x30),
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IsEncrypted = 0 != (0xFB73A955 ^ LittleEndian.ToUInt32 (header, 0x34)),
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IsCompressed = 0 != (0x37ACF831 ^ LittleEndian.ToUInt32 (header, 0x38)),
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};
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var cmvs_md5 = new uint[] {
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0x43DE7C19 ^ LittleEndian.ToUInt32 (header, 0x20),
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0xCC65F415 ^ LittleEndian.ToUInt32 (header, 0x24),
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0xD016A93C ^ LittleEndian.ToUInt32 (header, 0x28),
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0x97A3BA9A ^ LittleEndian.ToUInt32 (header, 0x2C),
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};
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int version = header[3] - '0';
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CpzHeader cpz = 5 == version ? ReadHeaderV5 (header) : ReadHeaderV6 (header);
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int index_size = cpz.DirEntriesSize + cpz.FileEntriesSize;
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var index = file.View.ReadBytes (0x40, (uint)index_size);
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if (index.Length != index_size)
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@ -131,24 +130,63 @@ namespace GameRes.Formats.Purple
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if (!header.Skip (0x10).Take (0x10).SequenceEqual (hash))
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return null;
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}
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foreach (var scheme in KnownSchemes.Values)
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var cmvs_md5 = cpz.CmvsMd5.Clone() as uint[];
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foreach (var scheme in KnownSchemes.Values.Where (s => s.Version == version))
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{
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// both CmvsMd5 and index will be altered by ReadIndex in decryption attempt
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Array.Copy (cmvs_md5, cpz.CmvsMd5, 4);
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var arc = ReadIndex (file, scheme, cpz, index);
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if (null != arc)
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return arc;
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// both CmvsMd5 and index was altered by ReadIndex in decryption attempt
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Array.Copy (cmvs_md5, cpz.CmvsMd5, 4);
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file.View.Read (0x40, index, 0, (uint)index_size);
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}
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throw new UnknownEncryptionScheme();
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}
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CpzHeader ReadHeaderV5 (byte[] header)
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{
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uint entry_key = 0x37ACF831 ^ LittleEndian.ToUInt32 (header, 0x38);
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var cpz = new CpzHeader
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{
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DirCount = -0x1C5AC27 ^ LittleEndian.ToInt32 (header, 4),
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DirEntriesSize = 0x37F298E7 ^ LittleEndian.ToInt32 (header, 8),
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FileEntriesSize = 0x7A6F3A2C ^ LittleEndian.ToInt32 (header, 0x0C),
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MasterKey = 0xAE7D39BF ^ LittleEndian.ToUInt32 (header, 0x30),
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IsEncrypted = 0 != (0xFB73A955 ^ LittleEndian.ToUInt32 (header, 0x34)),
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EntryKey = 0,
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};
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cpz.CmvsMd5[0] = 0x43DE7C19 ^ LittleEndian.ToUInt32 (header, 0x20);
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cpz.CmvsMd5[1] = 0xCC65F415 ^ LittleEndian.ToUInt32 (header, 0x24);
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cpz.CmvsMd5[2] = 0xD016A93C ^ LittleEndian.ToUInt32 (header, 0x28);
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cpz.CmvsMd5[3] = 0x97A3BA9A ^ LittleEndian.ToUInt32 (header, 0x2C);
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return cpz;
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}
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CpzHeader ReadHeaderV6 (byte[] header)
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{
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uint entry_key = 0x37ACF832 ^ LittleEndian.ToUInt32 (header, 0x38);
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var cpz = new CpzHeader
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{
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DirCount = -0x1C5AC26 ^ LittleEndian.ToInt32 (header, 4),
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DirEntriesSize = 0x37F298E8 ^ LittleEndian.ToInt32 (header, 8),
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FileEntriesSize = 0x7A6F3A2D ^ LittleEndian.ToInt32 (header, 0x0C),
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MasterKey = 0xAE7D39B7 ^ LittleEndian.ToUInt32 (header, 0x30),
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IsEncrypted = 0 != (0xFB73A956 ^ LittleEndian.ToUInt32 (header, 0x34)),
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EntryKey = 0x7DA8F173 * Binary.RotR (entry_key, 5) + 0x13712765,
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};
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cpz.CmvsMd5[0] = 0x43DE7C1A ^ LittleEndian.ToUInt32 (header, 0x20);
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cpz.CmvsMd5[1] = 0xCC65F416 ^ LittleEndian.ToUInt32 (header, 0x24);
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cpz.CmvsMd5[2] = 0xD016A93D ^ LittleEndian.ToUInt32 (header, 0x28);
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cpz.CmvsMd5[3] = 0x97A3BA9B ^ LittleEndian.ToUInt32 (header, 0x2C);
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return cpz;
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}
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ArcFile ReadIndex (ArcView file, CmvsScheme scheme, CpzHeader cpz, byte[] index)
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{
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var cmvs_md5 = Cmvs.MD5.Create (scheme.Md5Variant);
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cmvs_md5.Compute (cpz.CmvsMd5);
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DecryptIndexStage1 (index, cpz.MasterKey ^ 0x3795B39A, scheme.Cpz5Secret);
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DecryptIndexStage1 (index, cpz.MasterKey ^ 0x3795B39A, scheme);
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var decoder = new Cpz5Decoder (scheme, cpz.MasterKey, cpz.CmvsMd5[1]);
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decoder.Decode (index, 0, cpz.DirEntriesSize, 0x3A);
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@ -191,12 +229,10 @@ namespace GameRes.Formats.Purple
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int cur_entries_end = cur_offset + cur_entries_size;
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decoder.Decode (index, cur_offset, cur_entries_size, 0x7E);
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key[0] = cpz.CmvsMd5[0] ^ dir_key;
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key[1] = cpz.CmvsMd5[1] ^ (dir_key + 0x112233);
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key[2] = cpz.CmvsMd5[2] ^ dir_key;
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key[3] = cpz.CmvsMd5[3] ^ (dir_key + 0x34258765);
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for (int j = 0; j < 4; ++j)
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key[j] = cpz.CmvsMd5[j] ^ (dir_key + scheme.DirKeyAddend[j]);
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DecryptIndexEntry (index, cur_offset, cur_entries_size, key);
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DecryptIndexEntry (index, cur_offset, cur_entries_size, key, scheme.IndexSeed);
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bool is_root_dir = dir_name == "root";
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dir.Capacity = dir.Count + file_count;
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@ -212,8 +248,7 @@ namespace GameRes.Formats.Purple
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entry.Offset = LittleEndian.ToInt64 (index, cur_offset+4) + base_offset;
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entry.Size = LittleEndian.ToUInt32 (index, cur_offset+0xC);
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entry.CheckSum = LittleEndian.ToUInt32 (index, cur_offset+0x10);
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entry.Key = LittleEndian.ToUInt32 (index, cur_offset+0x14);
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entry.DirKey = dir_key;
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entry.Key = LittleEndian.ToUInt32 (index, cur_offset+0x14) + dir_key;
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if (!entry.CheckPlacement (file.MaxOffset))
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return null;
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dir.Add (entry);
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@ -236,7 +271,8 @@ namespace GameRes.Formats.Purple
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var data = carc.File.View.ReadBytes (entry.Offset, entry.Size);
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if (carc.Header.IsEncrypted)
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{
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uint key = (carc.Header.MasterKey ^ (cent.DirKey + cent.Key)) + (uint)carc.Header.DirCount - 0x5C29E87B;
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uint key = (carc.Header.MasterKey ^ cent.Key) + (uint)carc.Header.DirCount - 0x5C29E87B;
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key ^= carc.Header.EntryKey;
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carc.Decoder.DecryptEntry (data, carc.Header.CmvsMd5, key);
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}
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if (data.Length > 0x30 && Binary.AsciiEqual (data, 0, "PS2A"))
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@ -246,12 +282,13 @@ namespace GameRes.Formats.Purple
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return new MemoryStream (data);
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}
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void DecryptIndexStage1 (byte[] data, uint key, uint[] secret)
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void DecryptIndexStage1 (byte[] data, uint key, CmvsScheme scheme)
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{
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var sectet_key = new uint[24];
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var secret = scheme.Cpz5Secret;
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var secret_key = new uint[24];
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int secret_length = Math.Min (24, secret.Length);
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for (int i = 0; i < secret_length; ++i)
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sectet_key[i] = secret[i] - key;
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secret_key[i] = secret[i] - key;
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uint shift = key;
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shift = (shift >> 8) ^ key;
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@ -268,14 +305,14 @@ namespace GameRes.Formats.Purple
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int i = 5;
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for (int n = data.Length / 4; n > 0; --n)
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{
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*data32 = Binary.RotR ((sectet_key[i] ^ *data32) + 0x784C5962, (int)shift) + 0x01010101;
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*data32 = Binary.RotR ((secret_key[i] ^ *data32) + scheme.IndexAddend, (int)shift) + 0x01010101;
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++data32;
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i = (i + 1) % 24;
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}
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byte* data8 = (byte*)data32;
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for (int n = data.Length & 3; n > 0; --n)
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{
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*data8 = (byte)((*data8 ^ (sectet_key[i] >> (n * 4))) - 0x79);
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*data8 = (byte)((*data8 ^ (secret_key[i] >> (n * 4))) - scheme.IndexSubtrahend);
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++data8;
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i = (i + 1) % 24;
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}
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@ -308,13 +345,12 @@ namespace GameRes.Formats.Purple
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}
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}
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void DecryptIndexEntry (byte[] data, int offset, int length, uint[] key)
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void DecryptIndexEntry (byte[] data, int offset, int length, uint[] key, uint seed)
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{
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if (offset < 0 || offset > data.Length)
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throw new ArgumentOutOfRangeException ("offset");
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if (length < 0 || length > data.Length || length > data.Length-offset)
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throw new ArgumentException ("length");
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uint seed = 0x2A65CB4E;
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unsafe
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{
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fixed (byte* raw = &data[offset])
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@ -480,13 +516,13 @@ namespace GameRes.Formats.Purple
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int secret_length = Math.Min (m_scheme.Cpz5Secret.Length, 0x10) * sizeof(uint);
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byte[] key_bytes = new byte[secret_length];
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uint[] secret_key = new uint[0x10];
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uint key = cmvs_md5[1] >> 2;
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Buffer.BlockCopy (m_scheme.Cpz5Secret, 0, key_bytes, 0, secret_length);
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for (int i = 0; i < secret_length; ++i)
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key_bytes[i] = (byte)(key ^ m_decode_table[key_bytes[i]]);
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uint[] secret_key = new uint[0x10];
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Buffer.BlockCopy (key_bytes, 0, secret_key, 0, secret_length);
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for (int i = 0; i < secret_key.Length; ++i)
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secret_key[i] ^= seed;
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@ -497,7 +533,7 @@ namespace GameRes.Formats.Purple
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{
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uint* data32 = (uint*)raw;
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key = m_scheme.EntryInitKey;
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int k = 9;
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int k = m_scheme.EntryKeyPos;
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for (int i = data.Length / 4; i > 0; --i)
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{
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*data32 = cmvs_md5[key & 3] ^ ((*data32 ^ secret_key[(key >> 6) & 0xf] ^ (secret_key[k] >> 1)) - seed);
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@ -27,7 +27,7 @@ using GameRes.Utility;
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namespace GameRes.Formats.Cmvs
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{
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public enum Md5Variant { A, B }
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public enum Md5Variant { A, B, Chrono }
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public abstract class MD5 : Cryptography.MD5Base
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{
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@ -38,10 +38,13 @@ namespace GameRes.Formats.Cmvs
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static public MD5 Create (Md5Variant variant)
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{
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if (Md5Variant.A == variant)
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return new Md5VariantA();
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else
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return new Md5VariantB();
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switch (variant)
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{
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case Md5Variant.A: return new Md5VariantA();
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case Md5Variant.B: return new Md5VariantB();
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case Md5Variant.Chrono: return new Md5Chrono();
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default: throw new System.ArgumentException ("Unknown MD5 variant", "variant");
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}
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}
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protected abstract void InitState ();
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@ -79,6 +82,17 @@ namespace GameRes.Formats.Cmvs
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}
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}
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public class Md5Chrono : Md5VariantA
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{
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protected override void SetResult (uint[] data)
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{
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data[0] = m_state[2] ^ 0x45A76C2F;
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data[1] = m_state[1] - 0x5BA17FCB;
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data[2] = m_state[0] ^ 0x79ABE8AD;
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data[3] = m_state[3] - 0x1C08561B;
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}
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}
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public class Md5VariantB : MD5
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{
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protected override void InitState ()
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@ -397,6 +397,7 @@ Otome Chibaku Yuugi <span class="footnote">ShiinaRio v2.40</span><br/>
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Otome Juurin Yuugi <span class="footnote">ShiinaRio v2.37</span><br/>
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Ran→Sem <span class="footnote">ShiinaRio v2.47</span><br/>
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Rin×Sen <span class="footnote">ShiinaRio v2.47</span><br/>
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Sabae no Ou <span class="footnote">ShiinaRio v2.36</span><br/>
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Shinigami no Testament <span class="footnote">ShiinaRio v2.49</span><br/>
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Shojo Mama<span class="footnote">ShiinaRio v2.49</span><br/>
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Tantei Shounen A<span class="footnote">some old version, like 2.twenty-something</span><br/>
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@ -819,7 +820,8 @@ Otto no Mae de Okasarete...<br/>
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Gakuen Saimin Reido<br/>
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</td></tr>
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<tr class="odd"><td>*.akb</td><td><tt>AKB</tt></td><td>No</td></tr>
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<tr><td>*.cpz</td><td><tt>CPZ5</tt></td><td>No</td><td rowspan="2">CMVS</td><td rowspan="2">
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<tr><td>*.cpz</td><td><tt>CPZ5</tt><br/><tt>CPZ6</tt></td><td>No</td><td rowspan="2">CMVS</td><td rowspan="2">
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Chrono Clock<br/>
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Hapymaher<br/>
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Haruiro Ouse<br/>
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</td></tr>
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