internal static void ReadCrc(this Els_kom_Core.Classes.KOMStream kOMStream, string crcfile, out byte[] crcdata, ref int entry_count, ref int crc_size)
{
crcdata = System.IO.File.ReadAllBytes(crcfile);
System.IO.File.Delete(crcfile);
entry_count++;
crc_size = crcdata.Length;
}
public void Unpack(string in_path, string out_path, string KOMFileName)
{
System.IO.BinaryReader reader = new System.IO.BinaryReader(System.IO.File.OpenRead(in_path), System.Text.Encoding.ASCII);
reader.BaseStream.Position += 52;
int entry_count = (int)reader.ReadUInt64();
// trying to understand this crap... This is where it starts to fail
// for KOM V4 on Elsword's current data036.kom.
int compressed = reader.ReadInt32();
int file_time = reader.ReadInt32();
int xml_size = reader.ReadInt32();
byte[] xmldatabuffer = reader.ReadBytes(xml_size);
Els_kom_Core.Classes.KOMStream kOMStream = new Els_kom_Core.Classes.KOMStream();
kOMStream.DecryptCRCXml(compressed, ref xmldatabuffer, xml_size, System.Text.Encoding.ASCII);
string xmldata = System.Text.Encoding.ASCII.GetString(xmldatabuffer);
try
{
System.Collections.Generic.List <Els_kom_Core.Classes.EntryVer> entries = kOMStream.Make_entries_v4(xmldata, entry_count);
foreach (var entry in entries)
{
// we iterate through every entry here and unpack the data.
kOMStream.WriteOutput(reader, out_path, entry, SupportedKOMVersion);
}
}
catch (System.Xml.XmlException)
{
throw new Els_kom_Core.Classes.UnpackingError("failure with xml entry data reading...");
}
kOMStream.Dispose();
reader.Dispose();
}
internal static string GetSafeString(this Els_kom_Core.Classes.KOMStream kOMStream, string source)
{
if (source.Contains(new string(char.MinValue, 1)))
{
return(source.Substring(0, source.IndexOf(char.MinValue)));
}
return(source);
}
internal static void DecryptCRCXml(this Els_kom_Core.Classes.KOMStream kOMStream, int key, ref byte[] data, int length, System.Text.Encoding encoding)
{
// Load the KOM V4 keymap file.
LoadKeyMap();
if (!KeyMap.ContainsKey(key))
{
return;
}
string keyStr = KeyMap[key].ToString();
string sha1Key = System.BitConverter.ToString(new System.Security.Cryptography.SHA1CryptoServiceProvider().ComputeHash(encoding.GetBytes(keyStr))).Replace("-", "");
Els_kom_Core.Classes.BlowFish blowfish = new Els_kom_Core.Classes.BlowFish(sha1Key);
data = blowfish.Decrypt(data, System.Security.Cryptography.CipherMode.ECB);
blowfish.Dispose();
}
internal static bool ReadInFile(this Els_kom_Core.Classes.KOMStream kOMStream, System.IO.BinaryReader binaryReader, out int destInt)
{
if (binaryReader == null)
{
throw new System.ArgumentNullException(nameof(binaryReader));
}
long position = binaryReader.BaseStream.Position;
int readInt = binaryReader.ReadInt32();
if ((binaryReader.BaseStream.Position - position) == sizeof(int))
{
destInt = readInt;
return(true);
}
destInt = int.MinValue;
return(false);
}
public void Unpack(string in_path, string out_path, string KOMFileName)
{
System.IO.BinaryReader reader = new System.IO.BinaryReader(System.IO.File.OpenRead(in_path), System.Text.Encoding.ASCII);
reader.BaseStream.Position = 52;
Els_kom_Core.Classes.KOMStream kOMStream = new Els_kom_Core.Classes.KOMStream();
kOMStream.ReadInFile(reader, out int entry_count);
// without this dummy read the entry instances would not get the correct
// data leading to an crash when tring to make an file with the entry name in the output path.
kOMStream.ReadInFile(reader, out int size);
System.Collections.Generic.List <Els_kom_Core.Classes.EntryVer> entries = kOMStream.Make_entries_v2(entry_count, reader);
foreach (var entry in entries)
{
// we iterate through every entry here and unpack the data.
kOMStream.WriteOutput(reader, out_path, entry, SupportedKOMVersion);
}
kOMStream.Dispose();
reader.Dispose();
}
internal static bool ReadInFile(this Els_kom_Core.Classes.KOMStream kOMStream, System.IO.BinaryReader binaryReader, out string destString, int length, System.Text.Encoding encoding)
{
if (binaryReader == null)
{
throw new System.ArgumentNullException(nameof(binaryReader));
}
if (encoding == null)
{
throw new System.ArgumentNullException(nameof(encoding));
}
long position = binaryReader.BaseStream.Position;
byte[] readBytes = binaryReader.ReadBytes(length);
if ((binaryReader.BaseStream.Position - position) == length)
{
destString = encoding.GetString(readBytes);
return(true);
}
destString = null;
return(false);
}
public void Unpack(string in_path, string out_path, string KOMFileName)
{
System.IO.BinaryReader reader = new System.IO.BinaryReader(System.IO.File.OpenRead(in_path), System.Text.Encoding.ASCII);
reader.BaseStream.Position += 52;
int entry_count = (int)reader.ReadUInt64();
reader.BaseStream.Position += 4;
int file_time = reader.ReadInt32();
int xml_size = reader.ReadInt32();
byte[] xmldatabuffer = reader.ReadBytes(xml_size);
string xmldata = System.Text.Encoding.ASCII.GetString(xmldatabuffer);
Els_kom_Core.Classes.KOMStream kOMStream = new Els_kom_Core.Classes.KOMStream();
System.Collections.Generic.List <Els_kom_Core.Classes.EntryVer> entries = kOMStream.Make_entries_v3(xmldata, entry_count);
foreach (var entry in entries)
{
// we iterate through every entry here and unpack the data.
kOMStream.WriteOutput(reader, out_path, entry, SupportedKOMVersion);
}
kOMStream.Dispose();
reader.Dispose();
}
public void Pack(string in_path, string out_path, string KOMFileName)
{
bool use_XoR = false;
if (System.IO.File.Exists(in_path + "\\XoRNeeded.dummy"))
{
use_XoR = true;
System.IO.File.Delete(in_path + "\\XoRNeeded.dummy");
}
System.IO.BinaryWriter writer = new System.IO.BinaryWriter(System.IO.File.Create(out_path), System.Text.Encoding.ASCII);
int entry_count = 0;
int crc_size = 0;
Els_kom_Core.Classes.KOMStream kOMStream = new Els_kom_Core.Classes.KOMStream();
kOMStream.ReadCrc(in_path + "\\crc.xml", out byte[] crc_data, ref entry_count, ref crc_size);
kOMStream.Dispose();
System.IO.DirectoryInfo di = new System.IO.DirectoryInfo(in_path);
int offset = 0;
System.Collections.Generic.List <Els_kom_Core.Classes.EntryVer> entries = new System.Collections.Generic.List <Els_kom_Core.Classes.EntryVer>();
foreach (var fi in di.GetFiles())
{
entry_count++;
byte[] file_data = System.IO.File.ReadAllBytes(in_path + "\\" + fi.Name);
int originalsize = file_data.Length;
if (use_XoR)
{
byte[] xorkey = System.Text.Encoding.UTF8.GetBytes("\xa9\xa9\xa9\xa9\xa9\xa9\xa9\xa9\xa9\xa9");
Els_kom_Core.Classes.BlowFish.XorBlock(ref file_data, xorkey);
}
byte[] compressedData;
try
{
Els_kom_Core.Classes.ZlibHelper.CompressData(file_data, out compressedData);
}
catch (Els_kom_Core.Classes.Zlib.ZStreamException)
{
throw new Els_kom_Core.Classes.PackingError("failed with zlib compression of entries.");
}
int compressedSize = compressedData.Length;
offset += compressedSize;
entries.Add(new Els_kom_Core.Classes.EntryVer(compressedData, fi.Name, originalsize, compressedSize, offset));
}
if (use_XoR)
{
byte[] xorkey = System.Text.Encoding.UTF8.GetBytes("\xa9\xa9\xa9\xa9\xa9\xa9\xa9\xa9\xa9\xa9");
Els_kom_Core.Classes.BlowFish.XorBlock(ref crc_data, xorkey);
}
byte[] compressedcrcData;
try
{
Els_kom_Core.Classes.ZlibHelper.CompressData(crc_data, out compressedcrcData);
}
catch (Els_kom_Core.Classes.Zlib.ZStreamException)
{
throw new Els_kom_Core.Classes.PackingError("failed with zlib compression of crc.xml.");
}
int compressedcrc = compressedcrcData.Length;
offset += compressedcrc;
entries.Add(new Els_kom_Core.Classes.EntryVer(compressedcrcData, "crc.xml", crc_size, compressedcrc, offset));
writer.Write(KOMHeaderString.ToCharArray(), 0, KOMHeaderString.Length);
writer.BaseStream.Position = 52;
writer.Write(entry_count);
writer.Write(1);
foreach (var entry in entries)
{
writer.Write(entry.name.ToCharArray(), 0, entry.name.Length);
int seek_amount = 60 - entry.name.Length;
writer.BaseStream.Position += seek_amount;
writer.Write(entry.uncompressed_size);
writer.Write(entry.compressed_size);
writer.Write(entry.relative_offset);
}
foreach (var entry in entries)
{
writer.Write(entry.entrydata, 0, entry.compressed_size);
}
writer.Dispose();
}
internal static System.Collections.Generic.List <Els_kom_Core.Classes.EntryVer> Make_entries_v3(this Els_kom_Core.Classes.KOMStream kOMStream, string xmldata, int entry_count)
{
System.Collections.Generic.List <Els_kom_Core.Classes.EntryVer> entries = new System.Collections.Generic.List <Els_kom_Core.Classes.EntryVer>();
var xml = System.Xml.Linq.XElement.Parse(xmldata);
foreach (var fileElement in xml.Elements("File"))
{
var nameAttribute = fileElement.Attribute("Name");
var name = nameAttribute?.Value ?? "no value";
var sizeAttribute = fileElement.Attribute("Size");
var size = sizeAttribute == null ? -1 : System.Convert.ToInt32(sizeAttribute.Value);
var CompressedSizeAttribute = fileElement.Attribute("CompressedSize");
var CompressedSize = CompressedSizeAttribute == null ? -1 : System.Convert.ToInt32(CompressedSizeAttribute.Value);
var ChecksumAttribute = fileElement.Attribute("Checksum");
var Checksum = ChecksumAttribute == null ? -1 : int.Parse(ChecksumAttribute.Value, System.Globalization.NumberStyles.HexNumber);
var FileTimeAttribute = fileElement.Attribute("FileTime");
var FileTime = FileTimeAttribute == null ? -1 : int.Parse(FileTimeAttribute.Value, System.Globalization.NumberStyles.HexNumber);
var AlgorithmAttribute = fileElement.Attribute("Algorithm");
var Algorithm = AlgorithmAttribute == null ? -1 : System.Convert.ToInt32(AlgorithmAttribute.Value);
var entry = new Els_kom_Core.Classes.EntryVer(name, size, CompressedSize, Checksum, FileTime, Algorithm);
entries.Add(entry);
}
return(entries);
}
internal static System.Collections.Generic.List <Els_kom_Core.Classes.EntryVer> Make_entries_v2(this Els_kom_Core.Classes.KOMStream kOMStream, int entrycount, System.IO.BinaryReader reader)
{
System.Collections.Generic.List <Els_kom_Core.Classes.EntryVer> entries = new System.Collections.Generic.List <Els_kom_Core.Classes.EntryVer>();
for (int i = 0; i < entrycount; i++)
{
kOMStream.ReadInFile(reader, out string key, 60, System.Text.Encoding.ASCII);
kOMStream.ReadInFile(reader, out int originalsize);
kOMStream.ReadInFile(reader, out int compressedSize);
kOMStream.ReadInFile(reader, out int offset);
var entry = new Els_kom_Core.Classes.EntryVer(kOMStream.GetSafeString(key), originalsize, compressedSize, offset);
entries.Add(entry);
}
return(entries);
}
internal static System.Collections.Generic.List <Els_kom_Core.Classes.EntryVer> Make_entries_v4(this Els_kom_Core.Classes.KOMStream kOMStream, string xmldata, int entry_count)
{
System.Collections.Generic.List <Els_kom_Core.Classes.EntryVer> entries = new System.Collections.Generic.List <Els_kom_Core.Classes.EntryVer>();
var xml = System.Xml.Linq.XElement.Parse(xmldata);
foreach (var fileElement in xml.Elements("File"))
{
var nameAttribute = fileElement.Attribute("Name");
var name = nameAttribute?.Value ?? "no value";
var sizeAttribute = fileElement.Attribute("Size");
var size = sizeAttribute == null ? -1 : System.Convert.ToInt32(sizeAttribute.Value);
var CompressedSizeAttribute = fileElement.Attribute("CompressedSize");
var CompressedSize = CompressedSizeAttribute == null ? -1 : System.Convert.ToInt32(CompressedSizeAttribute.Value);
var ChecksumAttribute = fileElement.Attribute("Checksum");
var Checksum = ChecksumAttribute == null ? -1 : int.Parse(ChecksumAttribute.Value, System.Globalization.NumberStyles.HexNumber);
var FileTimeAttribute = fileElement.Attribute("FileTime");
var FileTime = FileTimeAttribute == null ? -1 : int.Parse(FileTimeAttribute.Value, System.Globalization.NumberStyles.HexNumber);
var AlgorithmAttribute = fileElement.Attribute("Algorithm");
var Algorithm = AlgorithmAttribute == null ? -1 : System.Convert.ToInt32(AlgorithmAttribute.Value);
// on v4 at least on Elsword there is now an MappedID attribute.
// this is even more of an reason to store some cache
// file for not only kom v3 for the algorithm 2 & 3
// files to be able to get repacked to those
// algorithm’s but also to store these unique
// map id’s to this version of kom.
var MappedIDAttribute = fileElement.Attribute("MappedID");
var MappedID = MappedIDAttribute?.Value ?? "no value";
var entry = new Els_kom_Core.Classes.EntryVer(name, size, CompressedSize, Checksum, FileTime, Algorithm, MappedID);
entries.Add(entry);
}
return(entries);
}
