/// <summary>
/// Loads and decrypts the KIFINT archive entries using the V_CODE2.<para/>
/// Using this will initialize with the specified KIFINT archive type.
/// </summary>
/// <param name="kifintPath">The path to the KIFINT archive to decrypt.</param>
/// <param name="type">The type of archive to create.</param>
/// <param name="vcode2">The V_CODE2 key obtained from the exe, used to decrypt the file names.</param>
/// <param name="callback">The optional callback for progress made during loading.</param>
/// <returns>The <see cref="KifintArchive"/> with all of the loaded entries.</returns>
///
/// <exception cref="ArgumentNullException">
/// <paramref name="kifintPath"/> or <paramref name="vcode2"/> is null.
/// </exception>
public static KifintArchive LoadArchive(string kifintPath, KifintType type, string vcode2,
KifintProgressCallback callback = null)
{
if (kifintPath == null)
{
throw new ArgumentNullException(nameof(kifintPath));
}
if (vcode2 == null)
{
throw new ArgumentNullException(nameof(vcode2));
}
KifintArchive archive;
KifintProgressArgs progress = new KifintProgressArgs {
ArchiveType = type,
ArchiveIndex = 0,
ArchiveCount = 1,
};
progress.ArchiveName = Path.GetFileName(kifintPath);
using (Stream stream = File.OpenRead(kifintPath))
archive = LoadLookup(type, stream, kifintPath, vcode2, progress, callback);
progress.ArchiveIndex++;
progress.EntryName = null;
progress.EntryIndex = 0;
progress.EntryCount = 0;
callback?.Invoke(progress);
return(archive);
}
/*public static KifintLookupCollection DecryptLookups(KifintType type, string installDir, string vcode2,
* KifintProgressCallback callback = null)
* {
*
* }*/
#endregion
#region DecryptArchive
public static void DecryptArchives(string wildcard, string installDir, string vcode2,
KifintProgressCallback callback = null)
{
if (vcode2 == null)
{
throw new ArgumentNullException(nameof(vcode2));
}
KifintType type = KifintType.Unknown;
string[] files = Directory.GetFiles(installDir, wildcard);
KifintProgressArgs progress = new KifintProgressArgs {
ArchiveType = type,
ArchiveIndex = 0,
ArchiveCount = files.Length,
};
foreach (string kifintPath in files)
{
progress.ArchiveName = Path.GetFileName(kifintPath);
string kifintBackup = Path.Combine(Path.GetDirectoryName(installDir) + "intbackups");
using (Stream stream = File.OpenRead(kifintPath))
DecryptArchive(stream, kifintPath, kifintBackup, vcode2, false, progress, callback);
progress.ArchiveIndex++;
}
progress.EntryName = null;
progress.EntryIndex = 0;
progress.EntryCount = 0;
callback?.Invoke(progress);
}
/// <summary>
/// Decrypts the KIFINT archives using the wildcard search, install directory, and name of executable with the
/// V_CODE2 used to decrypt.<para/>
/// Using this will initialize with <see cref="KifintType.Unknown"/>.
/// </summary>
/// <param name="wildcard">The wildcard name of the files to look for and merge.</param>
/// <param name="installDir">The installation directory for both the archives and executable.</param>
/// <param name="vcode2">The V_CODE2 key obtained from the exe, used to decrypt the file names.</param>
/// <param name="callback">The optional callback for progress made during decryption.</param>
/// <returns>The <see cref="KifintLookup"/> merged with all loaded archives.</returns>
///
/// <exception cref="ArgumentNullException">
/// <paramref name="wildcard"/>, <paramref name="installDir"/>, or <paramref name="vcode2"/> is null.
/// </exception>
public static KifintLookup LoadLookup(string wildcard, string installDir, string vcode2,
KifintProgressCallback callback = null)
{
if (vcode2 == null)
{
throw new ArgumentNullException(nameof(vcode2));
}
KifintType type = KifintType.Unknown;
KifintLookup lookup = new KifintLookup(type);
string[] files = Directory.GetFiles(installDir, wildcard);
KifintProgressArgs progress = new KifintProgressArgs {
ArchiveType = type,
ArchiveIndex = 0,
ArchiveCount = files.Length,
};
foreach (string kifintPath in files)
{
progress.ArchiveName = Path.GetFileName(kifintPath);
using (Stream stream = File.OpenRead(kifintPath))
lookup.Merge(LoadLookup(type, stream, kifintPath, vcode2, progress, callback));
progress.ArchiveIndex++;
}
progress.EntryName = null;
progress.EntryIndex = 0;
progress.EntryCount = 0;
callback?.Invoke(progress);
return(lookup);
}
/// <summary>
/// Decrypts the KIFINT archives using the known archive type, install directory, and name of executable with
/// the V_CODE2 used to decrypt.
/// </summary>
/// <param name="type">The type of archive to look for and decrypt.</param>
/// <param name="installDir">The installation directory for both the archives and executable.</param>
/// <param name="vcode2">The V_CODE2 key obtained from the exe, used to decrypt the file names.</param>
/// <param name="callback">The optional callback for progress made during decryption.</param>
/// <returns>The <see cref="KifintLookup"/> merged with all loaded archives.</returns>
///
/// <exception cref="ArgumentNullException">
/// <paramref name="installDir"/> or <paramref name="vcode2"/> is null.
/// </exception>
/// <exception cref="ArgumentException">
/// <paramref name="type"/> is <see cref="KifintType.Unknown"/>.
/// </exception>
public static KifintLookup LoadLookup(KifintType type, string installDir, string vcode2,
KifintProgressCallback callback = null)
{
if (vcode2 == null)
{
throw new ArgumentNullException(nameof(vcode2));
}
if (type == KifintType.Unknown)
{
throw new ArgumentException($"{nameof(type)} cannot be {nameof(KifintType.Unknown)}!", nameof(type));
}
KifintLookup lookup = new KifintLookup(type);
var files = Enumerable.Empty <string>();
var wildcardAttr = EnumInfo.GetAttribute <KifintType, KifintWildcardAttribute>(type);
foreach (string wildcard in wildcardAttr.Wildcards)
{
files = files.Concat(Directory.GetFiles(installDir, wildcard));
}
//string wildcard = EnumInfo.GetAttribute<KifintType, KifintWildcardAttribute>(type).Wildcard;
//string[] files = Directory.GetFiles(installDir, wildcard);
KifintProgressArgs progress = new KifintProgressArgs {
ArchiveType = type,
ArchiveIndex = 0,
ArchiveCount = files.Count(),
};
foreach (string kifintPath in files)
{
progress.ArchiveName = Path.GetFileName(kifintPath);
using (Stream stream = File.OpenRead(kifintPath))
lookup.Merge(LoadLookup(type, stream, kifintPath, vcode2, progress, callback));
progress.ArchiveIndex++;
}
progress.EntryName = null;
progress.EntryIndex = 0;
progress.EntryCount = 0;
callback?.Invoke(progress);
return(lookup);
}
/// <summary>
/// Decrypts the KIFINT archives using the known archive type, install directory, and name of executable with
/// the V_CODE2 used to decrypt.
/// </summary>
/// <param name="type">The type of archive to look for and decrypt.</param>
/// <param name="stream">The stream to the open KIFINT archive.</param>
/// <param name="installDir">The installation directory for both the archives and executable.</param>
/// <param name="exePath">The path to the executable to extract the V_CODE2 key from.</param>
/// <returns>The <see cref="KifintLookup"/> merged with all loaded archives.</returns>
///
/// <exception cref="ArgumentNullException">
/// <paramref name="stream"/>, <paramref name="kifintPath"/>, or <paramref name="exePath"/> is null.
/// </exception>
/// <exception cref="ObjectDisposedException">
/// The <paramref name="stream"/> is closed.
/// </exception>
private static KifintArchive LoadLookup(KifintType type, Stream stream, string kifintPath, string vcode2,
KifintProgressArgs progress, KifintProgressCallback callback)
{
if (kifintPath == null)
{
throw new ArgumentNullException(nameof(kifintPath));
}
if (vcode2 == null)
{
throw new ArgumentNullException(nameof(vcode2));
}
BinaryReader reader = new BinaryReader(stream);
KIFHDR hdr = reader.ReadUnmanaged <KIFHDR>();
UnexpectedFileTypeException.ThrowIfInvalid(hdr.Signature, KIFHDR.ExpectedSignature);
KIFENTRY[] entries = reader.ReadUnmanagedArray <KIFENTRY>(hdr.EntryCount);
progress.EntryName = null;
progress.EntryIndex = 0;
progress.EntryCount = entries.Length;
// Table of contents seed
uint tocSeed = GenerateTocSeed(vcode2);
uint fileKey = 0;
int fileKeyIndex = -1;
Blowfish blowfish = null;
// Obtain the decryption file key if one exists
for (int i = 0; i < hdr.EntryCount; i++)
{
if (entries[i].FileName == KeyFileName)
{
fileKey = MersenneTwister.GenRand(entries[i].Length);
blowfish = CatDebug.NewBlowfish(fileKey);
fileKeyIndex = i;
break;
}
}
const int ProgressThreshold = 500;
// Decrypt the KIFINT entries using the file key
if (fileKeyIndex != -1)
{
for (uint i = 0; i < hdr.EntryCount; i++, progress.EntryIndex++)
{
if (unchecked ((int)i) == fileKeyIndex)
{
continue;
}
// Give the entry the correct name
UnobfuscateFileName(entries[i].FileNameRaw, unchecked (tocSeed + i));
// Apply the extra offset before decryption
entries[i].Offset += i;
// Decrypt the entry's offset and length
blowfish.Decrypt(ref entries[i].Info);
progress.EntryName = entries[i].FileName;
if (i % ProgressThreshold == 0 || i + 1 == hdr.EntryCount)
{
callback?.Invoke(progress);
}
}
}
return(new KifintArchive(kifintPath, entries, fileKeyIndex != -1, fileKey, type, blowfish));
}
private static void DecryptArchiveSave(KIFHDR hdr, List <KIFENTRY> entries, uint tocSeed, uint fileKey,
Blowfish blowfish, int keyIndex, Stream inStream, Stream outStream, KifintProgressArgs progress,
KifintProgressCallback callback)
{
BinaryReader reader = new BinaryReader(inStream);
BinaryWriter writer = new BinaryWriter(outStream);
const int ProgressThreshold = 1;
progress.EntryName = null;
progress.EntryIndex = 0;
progress.EntryCount = entries.Count;
// Decrypt the KIFINT entries using the file key
for (uint i = 0; i < hdr.EntryCount; i++, progress.EntryIndex++)
{
if (unchecked ((int)i) == keyIndex)
{
continue;
}
KIFENTRY entry = entries[unchecked ((int)i)];
// Give the entry the correct name
UnobfuscateFileName(entry.FileNameRaw, unchecked (tocSeed + i));
// Apply the extra offset to be decrypted
entry.Offset += i;
// Decrypt the entry's length and offset
blowfish.Decrypt(ref entry.Info);
progress.EntryName = entry.FileName;
if (i % ProgressThreshold == 0 || i + 1 == hdr.EntryCount)
{
callback?.Invoke(progress);
}
// Goto the entry's decrypted offset, read the buffer, then decrypt it
inStream.Position = entry.Offset;
byte[] buffer = reader.ReadBytes(entry.Length);
blowfish.Decrypt(buffer, entry.Length & ~7);
// Move to the entry's offset in the output stream and write the buffer
outStream.Position = entry.Offset;
writer.Write(buffer);
// Make sure to reassign the entry to the list, because
// it's not an array and does not return struct references.
entries[unchecked ((int)i)] = entry;
}
entries.RemoveAt(keyIndex);
hdr.EntryCount--;
outStream.Position = 0;
writer.WriteUnmanaged(hdr);
writer.WriteUnmanagedArray(entries);
}
private static bool DecryptArchive(Stream inStream, string kifintPath, string kifintBackup, string vcode2, bool isBackup,
KifintProgressArgs progress, KifintProgressCallback callback)
{
if (kifintPath == null)
{
throw new ArgumentNullException(nameof(kifintPath));
}
if (vcode2 == null)
{
throw new ArgumentNullException(nameof(vcode2));
}
/*const string BackupName = "intbackup";
* string dir = Path.GetDirectoryName(kifintPath);
* string name = Path.GetFileName(kifintPath);
* string kifintBackup = Path.Combine(dir, BackupName, name);
* bool isBackup = Path.GetFileName(dir).ToLower() == BackupName;
* if (isBackup) {
* dir = Path.GetDirectoryName(dir);
* kifintPath = Path.Combine(dir, name);
* }
* else {
*
* }*/
Directory.CreateDirectory(Path.GetDirectoryName(kifintBackup));
BinaryReader reader = new BinaryReader(inStream);
KIFHDR hdr = reader.ReadUnmanaged <KIFHDR>();
try {
UnexpectedFileTypeException.ThrowIfInvalid(hdr.Signature, KIFHDR.ExpectedSignature);
} catch (UnexpectedFileTypeException) {
if (!isBackup && File.Exists(kifintBackup))
{
inStream.Close();
// We must have stopped while decrypting an archive. Let's restart from the already-made backup
using (inStream = File.OpenRead(kifintBackup))
DecryptArchive(inStream, kifintPath, kifintBackup, vcode2, true, progress, callback);
return(true);
}
throw;
}
List <KIFENTRY> entries = new List <KIFENTRY>(hdr.EntryCount);
entries.AddRange(reader.ReadUnmanagedArray <KIFENTRY>(hdr.EntryCount));
// Table of contents seed
uint tocSeed = GenerateTocSeed(vcode2);
uint fileKey = 0;
bool decrypt = false;
Blowfish blowfish = null;
int keyIndex = -1;
// Obtain the decryption file key if one exists
for (int i = 0; i < hdr.EntryCount; i++)
{
if (entries[i].FileName == KeyFileName)
{
fileKey = MersenneTwister.GenRand(entries[i].Length);
decrypt = true;
blowfish = CatDebug.NewBlowfish(fileKey);
keyIndex = i;
break;
}
}
// This archive is already decrypted, return and let the calling method know
if (!decrypt)
{
return(false);
}
if (isBackup)
{
using (Stream outStream = File.Create(kifintPath))
DecryptArchiveSave(hdr, entries, tocSeed, fileKey, blowfish, keyIndex, inStream, outStream,
progress, callback);
}
else
{
if (File.Exists(kifintBackup))
{
File.Delete(kifintBackup);
}
inStream.Close();
File.Move(kifintPath, kifintBackup);
using (inStream = File.OpenRead(kifintBackup))
using (Stream outStream = File.Create(kifintPath))
DecryptArchiveSave(hdr, entries, tocSeed, fileKey, blowfish, keyIndex, inStream, outStream,
progress, callback);
}
return(true);
}
