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implemented Entis archives decryption.

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This commit is contained in:
morkt 2015-05-27 13:57:34 +04:00
parent 6fa4b53299
commit d2eb1bbf8f
9 changed files with 459 additions and 11 deletions
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389
ArcFormats/ArcNOA.cs
View File

@ -1,4 +1,4 @@
//! \file ArcNOA.cs
//! \file ArcNOA.cs
//! \date Thu Apr 23 15:57:17 2015
//! \brief Entis GLS engine archives implementation.
//
@ -26,11 +26,21 @@
using System;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.Diagnostics;
using System.IO;
using System.Text;
using GameRes.Formats.Properties;
using GameRes.Formats.Strings;
using GameRes.Utility;
namespace GameRes.Formats.Entis
{
internal class NoaOptions : ResourceOptions
{
public string Scheme { get; set; }
public string PassPhrase { get; set; }
}
internal class NoaEntry : Entry
{
public byte[] Extra;
@ -38,6 +48,17 @@ namespace GameRes.Formats.Entis
public uint Attr;
}
internal class NoaArchive : ArcFile
{
public string Password;
public NoaArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, string password = null)
: base (arc, impl, dir)
{
Password = password;
}
}
[Export(typeof(ArchiveFormat))]
public class NoaOpener : ArchiveFormat
{
@ -47,6 +68,28 @@ namespace GameRes.Formats.Entis
public override bool IsHierarchic { get { return false; } }
public override bool CanCreate { get { return false; } }
public NoaOpener ()
{
Extensions = new string[] { "noa", "dat" };
}
public static readonly Dictionary<string, Dictionary<string, string>> KnownKeys =
new Dictionary<string, Dictionary<string, string>> {
{ arcStrings.NOAIgnoreEncryption, new Dictionary<string, string>() },
{ "Yatohime Zankikou", new Dictionary<string, string> {
{ "data1.noa", "arcdatapass" },
{ "data6.noa", "cfe7231hf9qccda" },
{ "data7.noa", "ceiuvw86680efq0hHDUHF673j" } } },
{ "You! Apron Chakuyou", new Dictionary<string, string> {
{ "containerb.noa", "7DQ1Xm7ZahIv1ZwlFgyMTMryKC6OP9V6cAgL64WD5JLyvmeEyqTSA5rUbRigOtebnnK4MuOptwsbOf4K8UBDH4kpAUOQgB71Qr1qxtHGxQl8KZKj6WIYWpPh0G3JOJat" } } },
{ "Do S Ane to Boku no Hounyou Kankei", new Dictionary<string, string> {
{ "d02.dat", "vwerc7s65r21bnfu" },
{ "d03.dat", "ctfvgbhnj67y8u" } } },
{ "Innyuu Famiresu", new Dictionary<string, string> {
{ "d01.dat", "vdiu$43AfUCfh9aksf" },
{ "d03.dat", "gaivnwq7365e021gf" } } },
};
public override ArcFile TryOpen (ArcView file)
{
if (!file.View.AsciiEqual (0, "Entis\x1a"))
@ -57,7 +100,27 @@ namespace GameRes.Formats.Entis
var reader = new IndexReader (file);
if (!reader.ParseDirEntry (0x40, ""))
return null;
return new ArcFile (file, this, reader.Dir);
if (!reader.HasEncrypted)
return new ArcFile (file, this, reader.Dir);
var options = Query<NoaOptions> (arcStrings.ArcEncryptedNotice);
string password = null;
if (!string.IsNullOrEmpty (options.PassPhrase))
{
password = options.PassPhrase;
}
else if (!string.IsNullOrEmpty (options.Scheme))
{
Dictionary<string, string> filemap;
if (KnownKeys.TryGetValue (options.Scheme, out filemap))
{
var filename = Path.GetFileName (file.Name).ToLowerInvariant();
filemap.TryGetValue (filename, out password);
}
}
if (string.IsNullOrEmpty (password))
return new ArcFile (file, this, reader.Dir);
return new NoaArchive (file, this, reader.Dir, password);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
@ -66,28 +129,84 @@ namespace GameRes.Formats.Entis
if (null == nent || !arc.File.View.AsciiEqual (entry.Offset, "filedata"))
return arc.File.CreateStream (entry.Offset, entry.Size);
ulong size = arc.File.View.ReadUInt64 (entry.Offset+8);
if (size > uint.MaxValue)
if (size > int.MaxValue)
throw new FileSizeException();
if (0 == nent.Encryption)
return arc.File.CreateStream (entry.Offset+0x10, (uint)size);
if (0x40000000 != nent.Encryption)
if (0 == size)
return Stream.Null;
var input = arc.File.CreateStream (entry.Offset+0x10, (uint)size);
try
{
System.Diagnostics.Trace.WriteLine (string.Format ("{0}: unknown encryption scheme 0x{1:x8}",
nent.Name, nent.Encryption));
return arc.File.CreateStream (entry.Offset+0x10, (uint)size);
var narc = arc as NoaArchive;
if (0 == nent.Encryption || size < 4 || null == narc || null == narc.Password)
return input;
if (0x40000000 != nent.Encryption)
{
Trace.WriteLine (string.Format ("{0}: unknown encryption scheme 0x{1:x8}",
nent.Name, nent.Encryption));
return input;
}
uint nTotalBytes = (uint)(size - 4);
var pBSHF = new BSHFDecodeContext (0x10000);
pBSHF.AttachInputFile (input);
pBSHF.PrepareToDecodeBSHFCode (narc.Password);
byte[] buf = new byte[nTotalBytes];
uint decoded = pBSHF.DecodeBSHFCodeBytes (buf, nTotalBytes);
if (decoded < nTotalBytes)
throw new EndOfStreamException ("Unexpected end of encrypted stream");
/*
byte[] bufCRC = new byte[4];
int iCRC = 0;
for (int i = 0; i < buf.Length; ++i)
{
bufCRC[iCRC] ^= buf[i];
iCRC = (iCRC + 1) & 0x03;
}
uint orgCRC = arc.File.View.ReadUInt32 (entry.Offset+0x10+nTotalBytes);
uint crc = LittleEndian.ToUInt32 (bufCRC, 0);
if (orgCRC != crc)
{
Trace.WriteLine (string.Format ("{0}: CRC mismatch", nent.Name));
input.Position = 0;
return input;
}
*/
input.Dispose();
return new MemoryStream (buf);
}
return arc.File.CreateStream (entry.Offset+0x10, (uint)size);
catch
{
input.Dispose();
throw;
}
}
public override ResourceOptions GetDefaultOptions ()
{
return new NoaOptions {
Scheme = Settings.Default.NOAScheme,
PassPhrase = Settings.Default.NOAPassPhrase,
};
}
public override object GetAccessWidget ()
{
return new GUI.WidgetNOA();
}
internal class IndexReader
{
ArcView m_file;
List<Entry> m_dir = new List<Entry>();
bool m_found_encrypted = false;
const char PathSeparatorChar = '/';
public List<Entry> Dir { get { return m_dir; } }
public bool HasEncrypted { get { return m_found_encrypted; } }
public IndexReader (ArcView file)
{
m_file = file;
@ -113,14 +232,20 @@ namespace GameRes.Formats.Entis
var entry = new NoaEntry();
entry.Size = m_file.View.ReadUInt32 (dir_offset);
dir_offset += 8;
entry.Attr = m_file.View.ReadUInt32 (dir_offset);
dir_offset += 4;
entry.Encryption = m_file.View.ReadUInt32 (dir_offset);
if (0 != entry.Encryption)
m_found_encrypted = true;
dir_offset += 4;
entry.Offset = base_offset + m_file.View.ReadInt64 (dir_offset);
if (!entry.CheckPlacement (m_file.MaxOffset))
return false;
dir_offset += 0x10;
uint extra_length = m_file.View.ReadUInt32 (dir_offset);
dir_offset += 4;
if (extra_length > 0 && 0 == (entry.Attr & 0x70))
@ -132,12 +257,15 @@ namespace GameRes.Formats.Entis
dir_offset += extra_length;
uint name_length = m_file.View.ReadUInt32 (dir_offset);
dir_offset += 4;
string name = m_file.View.ReadString (dir_offset, name_length);
dir_offset += name_length;
if (string.IsNullOrEmpty (cur_dir))
entry.Name = name;
else
entry.Name = cur_dir + PathSeparatorChar + name;
entry.Type = FormatCatalog.Instance.GetTypeFromName (name);
if (0x10 == entry.Attr)
{
if (!ParseDirEntry (entry.Offset+0x10, entry.Name))
@ -156,4 +284,245 @@ namespace GameRes.Formats.Entis
}
}
}
internal abstract class ERISADecodeContext
{
protected int m_nIntBufCount;
protected uint m_dwIntBuffer;
protected uint m_nBufferingSize;
protected uint m_nBufCount;
protected byte[] m_ptrBuffer;
protected int m_ptrNextBuf;
protected Stream m_pFile;
protected bool m_nFlagEOF;
public ERISADecodeContext (uint nBufferingSize)
{
m_nIntBufCount = 0;
m_nBufferingSize = (nBufferingSize + 0x03) & ~0x03u;
m_nBufCount = 0;
m_ptrBuffer = new byte[nBufferingSize];
m_pFile = null;
m_nFlagEOF = false;
}
public bool EofFlag { get { return m_nFlagEOF; } } // GetEOFFlag
public void AttachInputFile (Stream file)
{
m_pFile = file;
}
public uint ReadNextData (byte[] ptrBuffer, uint nBytes)
{
if (m_pFile != null)
{
uint read = (uint)m_pFile.Read (ptrBuffer, 0, (int)nBytes);
m_nFlagEOF = read != nBytes;
return read;
}
else
{
throw new ApplicationException ("Uninitialized ERISA encryption context");
}
}
public abstract uint DecodeBytes (Array ptrDst, uint nCount);
protected bool PrefetchBuffer()
{
if (0 == m_nIntBufCount)
{
if (0 == m_nBufCount)
{
m_ptrNextBuf = 0; // m_ptrBuffer;
m_nBufCount = ReadNextData (m_ptrBuffer, m_nBufferingSize);
if (0 == m_nBufCount)
{
return false;
}
if (0 != (m_nBufCount & 0x03))
{
uint i = m_nBufCount;
m_nBufCount += 4 - (m_nBufCount & 0x03);
while (i < m_nBufCount)
m_ptrBuffer[i ++] = 0;
}
}
m_nIntBufCount = 32;
m_dwIntBuffer =
((uint)m_ptrBuffer[m_ptrNextBuf] << 24) | ((uint)m_ptrBuffer[m_ptrNextBuf+1] << 16)
| ((uint)m_ptrBuffer[m_ptrNextBuf+2] << 8) | (uint)m_ptrBuffer[m_ptrNextBuf+3];
m_ptrNextBuf += 4;
m_nBufCount -= 4;
}
return true;
}
public void FlushBuffer ()
{
m_nIntBufCount = 0;
m_nBufCount = 0;
}
public int GetABit ()
{
if (!PrefetchBuffer())
{
return 1;
}
int nValue = ((int)m_dwIntBuffer) >> 31;
--m_nIntBufCount;
m_dwIntBuffer <<= 1;
return nValue;
}
public uint GetNBits (int n)
{
uint nCode = 0;
while (n != 0)
{
if (!PrefetchBuffer())
break;
int nCopyBits = Math.Min (n, m_nIntBufCount);
nCode = (nCode << nCopyBits) | (m_dwIntBuffer >> (32 - nCopyBits));
n -= nCopyBits;
m_nIntBufCount -= nCopyBits;
m_dwIntBuffer <<= nCopyBits;
}
return nCode;
}
}
internal class BSHFDecodeContext : ERISADecodeContext
{
ERIBshfBuffer m_pBshfBuf;
uint m_dwBufPos;
public BSHFDecodeContext (uint nBufferingSize) : base (nBufferingSize)
{
m_pBshfBuf = null;
}
public void PrepareToDecodeBSHFCode (string pszPassword)
{
if (null == m_pBshfBuf)
{
m_pBshfBuf = new ERIBshfBuffer();
}
if (string.IsNullOrEmpty (pszPassword))
{
pszPassword = " ";
}
int char_count = Encoding.ASCII.GetByteCount (pszPassword);
int length = Math.Max (char_count, 32);
var pass_bytes = new byte[length];
char_count = Encoding.ASCII.GetBytes (pszPassword, 0, pszPassword.Length, pass_bytes, 0);
if (char_count < 32)
{
pass_bytes[char_count++] = 0x1b;
for (int i = char_count; i < 32; ++i)
{
pass_bytes[i] = (byte)(pass_bytes[i % char_count] + pass_bytes[i - 1]);
}
}
m_pBshfBuf.m_strPassword = pass_bytes;
m_pBshfBuf.m_dwPassOffset = 0;
m_dwBufPos = 32;
}
public override uint DecodeBytes (Array ptrDst, uint nCount)
{
return DecodeBSHFCodeBytes (ptrDst as byte[], nCount);
}
public uint DecodeBSHFCodeBytes (byte[] ptrDst, uint nCount)
{
uint nDecoded = 0;
while (nDecoded < nCount)
{
if (m_dwBufPos >= 32)
{
for (int i = 0; i < 32; ++i)
{
if (0 == m_nBufCount)
{
m_ptrNextBuf = 0;
m_nBufCount = ReadNextData (m_ptrBuffer, m_nBufferingSize);
if (0 == m_nBufCount)
{
return nDecoded;
}
}
m_pBshfBuf.m_srcBSHF[i] = m_ptrBuffer[m_ptrNextBuf++];
m_nBufCount--;
}
m_pBshfBuf.DecodeBuffer();
m_dwBufPos = 0;
}
ptrDst[nDecoded++] = m_pBshfBuf.m_bufBSHF[m_dwBufPos++];
}
return nDecoded;
}
}
internal class ERIBshfBuffer
{
public byte[] m_strPassword;
public uint m_dwPassOffset = 0;
public byte[] m_bufBSHF = new byte[32];
public byte[] m_srcBSHF = new byte[32];
public byte[] m_maskBSHF = new byte[32];
public void DecodeBuffer ()
{
int nPassLen = m_strPassword.Length;
if ((int)m_dwPassOffset >= nPassLen)
{
m_dwPassOffset = 0;
}
for (int i = 0; i < 32; ++i)
{
m_bufBSHF[i] = 0;
m_maskBSHF[i] = 0;
}
int iPos = (int) m_dwPassOffset++;
int iBit = 0;
for (int i = 0; i < 256; ++i)
{
iBit = (iBit + m_strPassword[iPos++]) & 0xFF;
if (iPos >= nPassLen)
{
iPos = 0;
}
int iOffset = (iBit >> 3);
int iMask = (0x80 >> (iBit & 0x07));
while (0xFF == m_maskBSHF[iOffset])
{
iBit = (iBit + 8) & 0xFF;
iOffset = (iBit >> 3);
}
while (0 != (m_maskBSHF[iOffset] & iMask))
{
iBit ++;
iMask >>= 1;
if (0 == iMask)
{
iBit = (iBit + 8) & 0xFF;
iOffset = (iBit >> 3);
iMask = 0x80;
}
}
Debug.Assert (iMask != 0);
m_maskBSHF[iOffset] |= (byte) iMask;
if (0 != (m_srcBSHF[(i >> 3)] & (0x80 >> (i & 0x07))))
{
m_bufBSHF[iOffset] |= (byte)iMask;
}
}
}
}
}

24
ArcFormats/Properties/Settings.Designer.cs generated
View File

@ -297,5 +297,29 @@ namespace GameRes.Formats.Properties {
this["LPKScheme"] = value;
}
}
[global::System.Configuration.UserScopedSettingAttribute()]
[global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
[global::System.Configuration.DefaultSettingValueAttribute("")]
public string NOAScheme {
get {
return ((string)(this["NOAScheme"]));
}
set {
this["NOAScheme"] = value;
}
}
[global::System.Configuration.UserScopedSettingAttribute()]
[global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
[global::System.Configuration.DefaultSettingValueAttribute("")]
public string NOAPassPhrase {
get {
return ((string)(this["NOAPassPhrase"]));
}
set {
this["NOAPassPhrase"] = value;
}
}
}
}

6
ArcFormats/Properties/Settings.settings
View File

@ -71,5 +71,11 @@
<Setting Name="LPKScheme" Type="System.String" Scope="User">
<Value Profile="(Default)">Default</Value>
</Setting>
<Setting Name="NOAScheme" Type="System.String" Scope="User">
<Value Profile="(Default)" />
</Setting>
<Setting Name="NOAPassPhrase" Type="System.String" Scope="User">
<Value Profile="(Default)" />
</Setting>
</Settings>
</SettingsFile>

11
ArcFormats/Strings/arcStrings.Designer.cs generated
View File

@ -1,7 +1,7 @@
//------------------------------------------------------------------------------
// <auto-generated>
// This code was generated by a tool.
// Runtime Version:4.0.30319.18444
// Runtime Version:4.0.30319.34209
//
// Changes to this file may cause incorrect behavior and will be lost if
// the code is regenerated.
@ -387,6 +387,15 @@ namespace GameRes.Formats.Strings {
}
}
/// <summary>
/// Looks up a localized string similar to Ignore encryption.
/// </summary>
public static string NOAIgnoreEncryption {
get {
return ResourceManager.GetString("NOAIgnoreEncryption", resourceCulture);
}
}
/// <summary>
/// Looks up a localized string similar to Compress contents.
/// </summary>

3
ArcFormats/Strings/arcStrings.resx
View File

@ -315,4 +315,7 @@ predefined encryption scheme.</value>
<value>Archive directory is encrypted.
Enter archive encryption key.</value>
</data>
<data name="NOAIgnoreEncryption" xml:space="preserve">
<value>Ignore encryption</value>
</data>
</root>

3
ArcFormats/Strings/arcStrings.ru-RU.resx
View File

@ -210,6 +210,9 @@
<data name="MsgWritingIndex" xml:space="preserve">
<value>Записывается оглавление...</value>
</data>
<data name="NOAIgnoreEncryption" xml:space="preserve">
<value>Игнорировать шифрование</value>
</data>
<data name="NPACompressContents" xml:space="preserve">
<value>Сжать содержимое</value>
</data>

10
ArcFormats/WidgetNOA.xaml Normal file
View File

@ -0,0 +1,10 @@
<Grid x:Class="GameRes.Formats.GUI.WidgetNOA"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:entis="clr-namespace:GameRes.Formats.Entis"
xmlns:p="clr-namespace:GameRes.Formats.Properties"
MaxWidth="300">
<ComboBox Name="Scheme" ItemsSource="{Binding Source={x:Static entis:NoaOpener.KnownKeys}, Path=Keys, Mode=OneWay}"
SelectedValue="{Binding Source={x:Static p:Settings.Default}, Path=NOAScheme, Mode=TwoWay}"
Width="200"/>
</Grid>

18
ArcFormats/WidgetNOA.xaml.cs Normal file
View File

@ -0,0 +1,18 @@
using System.Windows.Controls;
namespace GameRes.Formats.GUI
{
/// <summary>
/// Interaction logic for WidgetNOA.xaml
/// </summary>
public partial class WidgetNOA : Grid
{
public WidgetNOA ()
{
InitializeComponent ();
// select first scheme as default
if (-1 == Scheme.SelectedIndex)
Scheme.SelectedIndex = 0;
}
}
}

6
ArcFormats/app.config
View File

@ -73,6 +73,12 @@
<setting name="LPKScheme" serializeAs="String">
<value>Default</value>
</setting>
<setting name="NOAScheme" serializeAs="String">
<value />
</setting>
<setting name="NOAPassPhrase" serializeAs="String">
<value />
</setting>
</GameRes.Formats.Properties.Settings>
</userSettings>
<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5"/></startup></configuration>