From f990fbb55e69f1bcb31187a4c1bd467dd72d44af Mon Sep 17 00:00:00 2001 From: morkt Date: Mon, 29 Aug 2016 05:48:56 +0400 Subject: [PATCH] implemented CPZ6 archives. --- ArcFormats/Cmvs/ArcCPZ.cs | 114 ++++++++++++++++++++++++------------- ArcFormats/Cmvs/CmvsMD5.cs | 24 ++++++-- supported.html | 4 +- 3 files changed, 97 insertions(+), 45 deletions(-) diff --git a/ArcFormats/Cmvs/ArcCPZ.cs b/ArcFormats/Cmvs/ArcCPZ.cs index 0b05074b..d30e0c5d 100644 --- a/ArcFormats/Cmvs/ArcCPZ.cs +++ b/ArcFormats/Cmvs/ArcCPZ.cs @@ -2,7 +2,7 @@ //! \date Tue Nov 24 11:27:23 2015 //! \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 // of this software and associated documentation files (the "Software"), to @@ -36,18 +36,25 @@ namespace GameRes.Formats.Purple [Serializable] public class CmvsScheme { + public int Version; public uint[] Cpz5Secret; public Cmvs.Md5Variant Md5Variant; public uint DecoderFactor; public uint EntryInitKey; 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 { public uint CheckSum; public uint Key; - public uint DirKey; } internal class CpzHeader @@ -58,7 +65,7 @@ namespace GameRes.Formats.Purple public uint[] CmvsMd5 = new uint[4]; public uint MasterKey; public bool IsEncrypted; - public bool IsCompressed; + public uint EntryKey; } internal class CpzArchive : ArcFile @@ -89,6 +96,11 @@ namespace GameRes.Formats.Purple public override bool IsHierarchic { get { return true; } } public override bool CanCreate { get { return false; } } + public CpzOpener () + { + Signatures = new uint[] { 0x355A5043, 0x365A5043 }; + } + public static Dictionary KnownSchemes = new Dictionary(); public override ResourceScheme Scheme @@ -105,21 +117,8 @@ namespace GameRes.Formats.Purple var checksum = file.View.ReadUInt32 (0x3C); if (checksum != CheckSum (header, 0, 0x3C, 0x923A564Cu)) return null; - 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)), - 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 version = header[3] - '0'; + CpzHeader cpz = 5 == version ? ReadHeaderV5 (header) : ReadHeaderV6 (header); int index_size = cpz.DirEntriesSize + cpz.FileEntriesSize; var index = file.View.ReadBytes (0x40, (uint)index_size); if (index.Length != index_size) @@ -131,24 +130,63 @@ namespace GameRes.Formats.Purple if (!header.Skip (0x10).Take (0x10).SequenceEqual (hash)) 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); if (null != 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); } 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) { var cmvs_md5 = Cmvs.MD5.Create (scheme.Md5Variant); 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]); decoder.Decode (index, 0, cpz.DirEntriesSize, 0x3A); @@ -191,12 +229,10 @@ namespace GameRes.Formats.Purple int cur_entries_end = cur_offset + cur_entries_size; decoder.Decode (index, cur_offset, cur_entries_size, 0x7E); - key[0] = cpz.CmvsMd5[0] ^ dir_key; - key[1] = cpz.CmvsMd5[1] ^ (dir_key + 0x112233); - key[2] = cpz.CmvsMd5[2] ^ dir_key; - key[3] = cpz.CmvsMd5[3] ^ (dir_key + 0x34258765); + for (int j = 0; j < 4; ++j) + key[j] = cpz.CmvsMd5[j] ^ (dir_key + scheme.DirKeyAddend[j]); - 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"; 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.Size = LittleEndian.ToUInt32 (index, cur_offset+0xC); entry.CheckSum = LittleEndian.ToUInt32 (index, cur_offset+0x10); - entry.Key = LittleEndian.ToUInt32 (index, cur_offset+0x14); - entry.DirKey = dir_key; + entry.Key = LittleEndian.ToUInt32 (index, cur_offset+0x14) + dir_key; if (!entry.CheckPlacement (file.MaxOffset)) return null; dir.Add (entry); @@ -236,7 +271,8 @@ namespace GameRes.Formats.Purple var data = carc.File.View.ReadBytes (entry.Offset, entry.Size); 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); } if (data.Length > 0x30 && Binary.AsciiEqual (data, 0, "PS2A")) @@ -246,12 +282,13 @@ namespace GameRes.Formats.Purple 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); for (int i = 0; i < secret_length; ++i) - sectet_key[i] = secret[i] - key; + secret_key[i] = secret[i] - key; uint shift = key; shift = (shift >> 8) ^ key; @@ -268,14 +305,14 @@ namespace GameRes.Formats.Purple int i = 5; 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; i = (i + 1) % 24; } byte* data8 = (byte*)data32; 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; 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) throw new ArgumentOutOfRangeException ("offset"); if (length < 0 || length > data.Length || length > data.Length-offset) throw new ArgumentException ("length"); - uint seed = 0x2A65CB4E; unsafe { 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); byte[] key_bytes = new byte[secret_length]; - uint[] secret_key = new uint[0x10]; uint key = cmvs_md5[1] >> 2; Buffer.BlockCopy (m_scheme.Cpz5Secret, 0, key_bytes, 0, secret_length); for (int i = 0; i < secret_length; ++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); for (int i = 0; i < secret_key.Length; ++i) secret_key[i] ^= seed; @@ -497,7 +533,7 @@ namespace GameRes.Formats.Purple { uint* data32 = (uint*)raw; key = m_scheme.EntryInitKey; - int k = 9; + int k = m_scheme.EntryKeyPos; 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); diff --git a/ArcFormats/Cmvs/CmvsMD5.cs b/ArcFormats/Cmvs/CmvsMD5.cs index d9bf714a..e9958952 100644 --- a/ArcFormats/Cmvs/CmvsMD5.cs +++ b/ArcFormats/Cmvs/CmvsMD5.cs @@ -27,7 +27,7 @@ using GameRes.Utility; namespace GameRes.Formats.Cmvs { - public enum Md5Variant { A, B } + public enum Md5Variant { A, B, Chrono } public abstract class MD5 : Cryptography.MD5Base { @@ -38,10 +38,13 @@ namespace GameRes.Formats.Cmvs static public MD5 Create (Md5Variant variant) { - if (Md5Variant.A == variant) - return new Md5VariantA(); - else - return new Md5VariantB(); + switch (variant) + { + case Md5Variant.A: return new Md5VariantA(); + 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 (); @@ -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 { protected override void InitState () diff --git a/supported.html b/supported.html index 94f80891..f5411c1d 100644 --- a/supported.html +++ b/supported.html @@ -397,6 +397,7 @@ Otome Chibaku Yuugi ShiinaRio v2.40
Otome Juurin Yuugi ShiinaRio v2.37
Ran→Sem ShiinaRio v2.47
Rin×Sen ShiinaRio v2.47
+Sabae no Ou ShiinaRio v2.36
Shinigami no Testament ShiinaRio v2.49
Shojo MamaShiinaRio v2.49
Tantei Shounen Asome old version, like 2.twenty-something
@@ -819,7 +820,8 @@ Otto no Mae de Okasarete...
Gakuen Saimin Reido
*.akbAKBNo -*.cpzCPZ5NoCMVS +*.cpzCPZ5
CPZ6NoCMVS +Chrono Clock
Hapymaher
Haruiro Ouse