73 lines
2.8 KiB
C#
73 lines
2.8 KiB
C#
|
using System;
|
|||
|
|
using System.Collections.Generic;
|
|||
|
|
using System.IO;
|
|||
|
|
using System.Text;
|
|||
|
|
using Org.BouncyCastle.Asn1;
|
|||
|
|
|
|||
|
|
namespace VipNetExtract
|
|||
|
|
{
|
|||
|
|
class VipNetContainer
|
|||
|
|
{
|
|||
|
|
private VipNetContainer(
|
|||
|
|
string type, uint version, int headerSize,
|
|||
|
|
byte[] header, IList<VipNetContainerEntry> entries)
|
|||
|
|
{
|
|||
|
|
Type = type;
|
|||
|
|
Version = version;
|
|||
|
|
HeaderSize = headerSize;
|
|||
|
|
Header = header;
|
|||
|
|
Entries = entries;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public string Type { get; }
|
|||
|
|
public uint Version { get; }
|
|||
|
|
public int HeaderSize { get; }
|
|||
|
|
public byte[] Header { get; }
|
|||
|
|
public IList<VipNetContainerEntry> Entries { get; }
|
|||
|
|
|
|||
|
|
public static VipNetContainer LoadFromStream(Stream strm)
|
|||
|
|
{
|
|||
|
|
using (var reader = new BinaryReader(strm)) {
|
|||
|
|
var type = Encoding.ASCII.GetString(reader.ReadBytes(4));
|
|||
|
|
if (type != "ITCS" && type != "PKEY" && type != "_CCK" && type != "_LCK")
|
|||
|
|
throw new NotSupportedException($"Неподдерживаемый тип контейнера: {type}.");
|
|||
|
|
|
|||
|
|
var version = reader.ReadUInt32();
|
|||
|
|
if (LoWord(version) > 0xFF || HiWord(version) > 2)
|
|||
|
|
throw new NotSupportedException($"Неподдерживаемая версия контейнера: {version}.");
|
|||
|
|
|
|||
|
|
var headerSize = reader.ReadInt32();
|
|||
|
|
var header = new byte[headerSize];
|
|||
|
|
if (headerSize > 0)
|
|||
|
|
header = reader.ReadBytes(headerSize);
|
|||
|
|
|
|||
|
|
var entries = new List<VipNetContainerEntry>();
|
|||
|
|
while (strm.Position < strm.Length) {
|
|||
|
|
var entrySize = reader.ReadInt32();
|
|||
|
|
var entryStartPos = strm.Position;
|
|||
|
|
var entrySeq = (Asn1Sequence)Asn1Object.FromStream(strm);
|
|||
|
|
var keySize = reader.ReadInt32();
|
|||
|
|
if (keySize < 0 || strm.Position + keySize - entryStartPos != entrySize)
|
|||
|
|
throw new InvalidOperationException($"Некорректный размер блока с ключом: {keySize}.");
|
|||
|
|
var key = reader.ReadBytes(keySize);
|
|||
|
|
entries.Add(new VipNetContainerEntry(entrySeq, key));
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (entries.Count == 0)
|
|||
|
|
throw new InvalidOperationException("Контейнер не содержит записей.");
|
|||
|
|
|
|||
|
|
return new VipNetContainer(type, version, headerSize, header, entries);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public static VipNetContainer LoadFromFile(string fileName)
|
|||
|
|
{
|
|||
|
|
using (var strm = File.OpenRead(fileName))
|
|||
|
|
return LoadFromStream(strm);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
static uint LoWord(uint x) => x & 0x0000FFFF;
|
|||
|
|
static uint HiWord(uint x) => x >> 16;
|
|||
|
|
}
|
|||
|
|
}
|