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(KiriKiri): consider MD5-hashed filenames.

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This commit is contained in:
morkt 2016-11-26 08:54:01 +04:00
parent 7b0c116ea6
commit a6452693cb
1 changed files with 61 additions and 10 deletions
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71
ArcFormats/KiriKiri/ArcXP3.cs
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@ -32,6 +32,7 @@ using System.Linq;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.Runtime.InteropServices;
using System.Security.Cryptography;
using System.Diagnostics;
using GameRes.Compression;
using GameRes.Utility;
@ -140,10 +141,10 @@ namespace GameRes.Formats.KiriKiri
var crypt_algorithm = new Lazy<ICrypt> (() => QueryCryptAlgorithm (file), false);
var filename_map = new Dictionary<uint, string>();
var dir = new List<Entry>();
dir_offset = 0;
using (var header = new BinaryReader (header_stream, Encoding.Unicode))
using (var filename_map = new FilenameMap())
{
while (-1 != header.PeekChar())
{
@ -161,7 +162,8 @@ namespace GameRes.Formats.KiriKiri
entry_size -= 6;
if (name_size * 2 <= entry_size)
{
filename_map[hash] = new string (header.ReadChars (name_size));
var filename = new string (header.ReadChars (name_size));
filename_map.Add (hash, filename);
}
}
else if (0x656C6946 == entry_signature) // "File"
@ -204,17 +206,15 @@ namespace GameRes.Formats.KiriKiri
else
entry.Cipher = NoCryptAlgorithm;
string name = null;
if (0 == filename_map.Count || !filename_map.TryGetValue (entry.Hash, out name))
var name = new string (header.ReadChars (name_size));
if (entry.Cipher.ObfuscatedIndex && ObfuscatedPathRe.IsMatch (name))
{
name = new string (header.ReadChars (name_size));
if (entry.Cipher.ObfuscatedIndex && ObfuscatedPathRe.IsMatch (name))
{
goto NextEntry;
}
goto NextEntry;
}
if (filename_map.Count > 0)
name = filename_map.Get (entry.Hash, name);
entry.Name = name;
entry.Type = FormatCatalog.Instance.GetTypeFromName (entry.Name);
entry.Type = FormatCatalog.Instance.GetTypeFromName (name);
entry.IsEncrypted = !(entry.Cipher is NoCrypt)
&& !(entry.Cipher.StartupTjsNotEncrypted && "startup.tjs" == name);
break;
@ -896,4 +896,55 @@ NextEntry:
}
#endregion
}
/// <summary>
/// Class that maps file hashes to filenames.
/// </summary>
internal sealed class FilenameMap : IDisposable
{
Dictionary<uint, string> m_hash_map = new Dictionary<uint, string>();
Dictionary<string, string> m_md5_map = new Dictionary<string, string>();
MD5 m_md5 = MD5.Create();
StringBuilder m_md5_str = new StringBuilder();
public int Count { get { return m_md5_map.Count; } }
public void Add (uint hash, string filename)
{
if (!m_hash_map.ContainsKey (hash))
m_hash_map[hash] = filename;
m_md5_map[GetMd5Hash (filename)] = filename;
}
public string Get (uint hash, string md5)
{
string filename;
if (m_md5_map.TryGetValue (md5, out filename))
return filename;
if (m_hash_map.TryGetValue (hash, out filename))
return filename;
return md5;
}
string GetMd5Hash (string text)
{
var text_bytes = Encoding.Unicode.GetBytes (text.ToLowerInvariant());
var md5 = m_md5.ComputeHash (text_bytes);
m_md5_str.Clear();
for (int i = 0; i < md5.Length; ++i)
m_md5_str.AppendFormat ("{0:x2}", md5[i]);
return m_md5_str.ToString();
}
bool _disposed = false;
public void Dispose ()
{
if (!_disposed)
{
m_md5.Dispose();
_disposed = true;
}
}
}
}