1592 lines
53 KiB
C#
1592 lines
53 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.IO;
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using System.Linq;
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using SharpCompress.Compressors.LZMA;
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using SharpCompress.Compressors.LZMA.Utilites;
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using SharpCompress.IO;
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namespace SharpCompress.Common.SevenZip
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{
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internal class ArchiveReader
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{
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internal Stream _stream;
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internal Stack<DataReader> _readerStack = new Stack<DataReader>();
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internal DataReader _currentReader;
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internal long _streamOrigin;
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internal long _streamEnding;
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internal byte[] _header;
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private readonly Dictionary<int, Stream> _cachedStreams = new Dictionary<int, Stream>();
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internal void AddByteStream(byte[] buffer, int offset, int length)
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{
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_readerStack.Push(_currentReader);
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_currentReader = new DataReader(buffer, offset, length);
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}
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internal void DeleteByteStream()
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{
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_currentReader = _readerStack.Pop();
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}
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#region Private Methods - Data Reader
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internal Byte ReadByte()
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{
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return _currentReader.ReadByte();
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}
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private void ReadBytes(byte[] buffer, int offset, int length)
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{
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_currentReader.ReadBytes(buffer, offset, length);
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}
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private ulong ReadNumber()
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{
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return _currentReader.ReadNumber();
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}
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internal int ReadNum()
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{
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return _currentReader.ReadNum();
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}
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private uint ReadUInt32()
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{
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return _currentReader.ReadUInt32();
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}
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private ulong ReadUInt64()
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{
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return _currentReader.ReadUInt64();
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}
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private BlockType? ReadId()
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{
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ulong id = _currentReader.ReadNumber();
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if (id > 25)
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{
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return null;
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}
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#if DEBUG
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Log.WriteLine("ReadId: {0}", (BlockType)id);
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#endif
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return (BlockType)id;
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}
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private void SkipData(long size)
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{
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_currentReader.SkipData(size);
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}
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private void SkipData()
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{
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_currentReader.SkipData();
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}
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private void WaitAttribute(BlockType attribute)
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{
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for (;;)
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{
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BlockType? type = ReadId();
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if (type == attribute)
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{
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return;
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}
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if (type == BlockType.End)
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{
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throw new InvalidOperationException();
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}
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SkipData();
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}
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}
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private void ReadArchiveProperties()
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{
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while (ReadId() != BlockType.End)
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{
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SkipData();
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}
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}
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#endregion
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#region Private Methods - Reader Utilities
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private BitVector ReadBitVector(int length)
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{
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var bits = new BitVector(length);
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byte data = 0;
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byte mask = 0;
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for (int i = 0; i < length; i++)
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{
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if (mask == 0)
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{
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data = ReadByte();
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mask = 0x80;
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}
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if ((data & mask) != 0)
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{
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bits.SetBit(i);
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}
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mask >>= 1;
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}
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return bits;
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}
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private BitVector ReadOptionalBitVector(int length)
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{
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byte allTrue = ReadByte();
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if (allTrue != 0)
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{
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return new BitVector(length, true);
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}
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return ReadBitVector(length);
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}
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private void ReadNumberVector(List<byte[]> dataVector, int numFiles, Action<int, long?> action)
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{
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var defined = ReadOptionalBitVector(numFiles);
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using (CStreamSwitch streamSwitch = new CStreamSwitch())
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{
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streamSwitch.Set(this, dataVector);
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for (int i = 0; i < numFiles; i++)
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{
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if (defined[i])
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{
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action(i, checked((long)ReadUInt64()));
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}
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else
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{
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action(i, null);
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}
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}
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}
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}
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private DateTime TranslateTime(long time)
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{
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// FILETIME = 100-nanosecond intervals since January 1, 1601 (UTC)
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return DateTime.FromFileTimeUtc(time).ToLocalTime();
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}
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private DateTime? TranslateTime(long? time)
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{
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if (time.HasValue && time.Value >= 0 && time.Value <= 2650467743999999999) //maximum Windows file time 31.12.9999
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{
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return TranslateTime(time.Value);
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}
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return null;
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}
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private void ReadDateTimeVector(List<byte[]> dataVector, int numFiles, Action<int, DateTime?> action)
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{
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ReadNumberVector(dataVector, numFiles, (index, value) => action(index, TranslateTime(value)));
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}
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private void ReadAttributeVector(List<byte[]> dataVector, int numFiles, Action<int, uint?> action)
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{
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BitVector boolVector = ReadOptionalBitVector(numFiles);
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using (var streamSwitch = new CStreamSwitch())
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{
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streamSwitch.Set(this, dataVector);
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for (int i = 0; i < numFiles; i++)
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{
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if (boolVector[i])
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{
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action(i, ReadUInt32());
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}
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else
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{
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action(i, null);
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}
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}
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}
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}
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#endregion
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#region Private Methods
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private void GetNextFolderItem(CFolder folder)
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{
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#if DEBUG
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Log.WriteLine("-- GetNextFolderItem --");
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Log.PushIndent();
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#endif
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try
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{
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int numCoders = ReadNum();
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#if DEBUG
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Log.WriteLine("NumCoders: " + numCoders);
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#endif
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folder._coders = new List<CCoderInfo>(numCoders);
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int numInStreams = 0;
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int numOutStreams = 0;
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for (int i = 0; i < numCoders; i++)
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{
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#if DEBUG
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Log.WriteLine("-- Coder --");
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Log.PushIndent();
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#endif
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try
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{
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CCoderInfo coder = new CCoderInfo();
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folder._coders.Add(coder);
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byte mainByte = ReadByte();
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int idSize = (mainByte & 0xF);
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byte[] longId = new byte[idSize];
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ReadBytes(longId, 0, idSize);
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#if DEBUG
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Log.WriteLine("MethodId: " + String.Join("", Enumerable.Range(0, idSize).Select(x => longId[x].ToString("x2")).ToArray()));
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#endif
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if (idSize > 8)
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{
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throw new NotSupportedException();
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}
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ulong id = 0;
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for (int j = 0; j < idSize; j++)
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{
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id |= (ulong)longId[idSize - 1 - j] << (8 * j);
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}
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coder._methodId = new CMethodId(id);
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if ((mainByte & 0x10) != 0)
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{
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coder._numInStreams = ReadNum();
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coder._numOutStreams = ReadNum();
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#if DEBUG
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Log.WriteLine("Complex Stream (In: " + coder._numInStreams + " - Out: " + coder._numOutStreams + ")");
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#endif
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}
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else
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{
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#if DEBUG
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Log.WriteLine("Simple Stream (In: 1 - Out: 1)");
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#endif
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coder._numInStreams = 1;
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coder._numOutStreams = 1;
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}
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if ((mainByte & 0x20) != 0)
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{
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int propsSize = ReadNum();
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coder._props = new byte[propsSize];
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ReadBytes(coder._props, 0, propsSize);
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#if DEBUG
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Log.WriteLine("Settings: " + String.Join("", coder._props.Select(bt => bt.ToString("x2")).ToArray()));
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#endif
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}
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if ((mainByte & 0x80) != 0)
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{
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throw new NotSupportedException();
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}
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numInStreams += coder._numInStreams;
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numOutStreams += coder._numOutStreams;
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}
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finally
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{
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#if DEBUG
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Log.PopIndent();
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#endif
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}
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}
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int numBindPairs = numOutStreams - 1;
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folder._bindPairs = new List<CBindPair>(numBindPairs);
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#if DEBUG
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Log.WriteLine("BindPairs: " + numBindPairs);
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Log.PushIndent();
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#endif
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for (int i = 0; i < numBindPairs; i++)
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{
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CBindPair bp = new CBindPair();
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bp._inIndex = ReadNum();
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bp._outIndex = ReadNum();
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folder._bindPairs.Add(bp);
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#if DEBUG
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Log.WriteLine("#" + i + " - In: " + bp._inIndex + " - Out: " + bp._outIndex);
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#endif
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}
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#if DEBUG
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Log.PopIndent();
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#endif
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if (numInStreams < numBindPairs)
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{
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throw new NotSupportedException();
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}
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int numPackStreams = numInStreams - numBindPairs;
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//folder.PackStreams.Reserve(numPackStreams);
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if (numPackStreams == 1)
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{
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for (int i = 0; i < numInStreams; i++)
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{
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if (folder.FindBindPairForInStream(i) < 0)
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{
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#if DEBUG
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Log.WriteLine("Single PackStream: #" + i);
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#endif
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folder._packStreams.Add(i);
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break;
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}
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}
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if (folder._packStreams.Count != 1)
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{
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throw new NotSupportedException();
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}
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}
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else
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{
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#if DEBUG
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Log.WriteLine("Multiple PackStreams ...");
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Log.PushIndent();
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#endif
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for (int i = 0; i < numPackStreams; i++)
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{
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var num = ReadNum();
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#if DEBUG
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Log.WriteLine("#" + i + " - " + num);
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#endif
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folder._packStreams.Add(num);
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}
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#if DEBUG
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Log.PopIndent();
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#endif
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}
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}
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finally
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{
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#if DEBUG
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Log.PopIndent();
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#endif
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}
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}
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private List<uint?> ReadHashDigests(int count)
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{
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#if DEBUG
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Log.Write("ReadHashDigests:");
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#endif
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var defined = ReadOptionalBitVector(count);
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var digests = new List<uint?>(count);
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for (int i = 0; i < count; i++)
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{
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if (defined[i])
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{
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uint crc = ReadUInt32();
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#if DEBUG
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Log.Write(" " + crc.ToString("x8"));
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#endif
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digests.Add(crc);
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}
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else
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{
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#if DEBUG
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Log.Write(" ########");
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#endif
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digests.Add(null);
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}
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}
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#if DEBUG
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Log.WriteLine();
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#endif
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return digests;
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}
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private void ReadPackInfo(out long dataOffset, out List<long> packSizes, out List<uint?> packCrCs)
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{
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#if DEBUG
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Log.WriteLine("-- ReadPackInfo --");
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Log.PushIndent();
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#endif
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try
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{
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packCrCs = null;
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dataOffset = checked((long)ReadNumber());
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#if DEBUG
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Log.WriteLine("DataOffset: " + dataOffset);
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#endif
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int numPackStreams = ReadNum();
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#if DEBUG
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Log.WriteLine("NumPackStreams: " + numPackStreams);
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#endif
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WaitAttribute(BlockType.Size);
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packSizes = new List<long>(numPackStreams);
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#if DEBUG
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Log.Write("Sizes:");
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#endif
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for (int i = 0; i < numPackStreams; i++)
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{
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var size = checked((long)ReadNumber());
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#if DEBUG
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Log.Write(" " + size);
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#endif
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packSizes.Add(size);
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}
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#if DEBUG
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Log.WriteLine();
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#endif
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BlockType? type;
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for (;;)
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{
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type = ReadId();
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if (type == BlockType.End)
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{
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break;
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}
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if (type == BlockType.Crc)
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{
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packCrCs = ReadHashDigests(numPackStreams);
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continue;
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}
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SkipData();
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}
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if (packCrCs == null)
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{
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packCrCs = new List<uint?>(numPackStreams);
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for (int i = 0; i < numPackStreams; i++)
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{
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packCrCs.Add(null);
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}
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}
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}
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finally
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{
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#if DEBUG
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Log.PopIndent();
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#endif
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}
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}
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private void ReadUnpackInfo(List<byte[]> dataVector, out List<CFolder> folders)
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{
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#if DEBUG
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Log.WriteLine("-- ReadUnpackInfo --");
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Log.PushIndent();
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#endif
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try
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{
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WaitAttribute(BlockType.Folder);
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int numFolders = ReadNum();
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#if DEBUG
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Log.WriteLine("NumFolders: {0}", numFolders);
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#endif
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using (CStreamSwitch streamSwitch = new CStreamSwitch())
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{
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streamSwitch.Set(this, dataVector);
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//folders.Clear();
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//folders.Reserve(numFolders);
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folders = new List<CFolder>(numFolders);
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int index = 0;
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for (int i = 0; i < numFolders; i++)
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{
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var f = new CFolder {_firstPackStreamId = index};
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folders.Add(f);
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GetNextFolderItem(f);
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index += f._packStreams.Count;
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}
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}
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WaitAttribute(BlockType.CodersUnpackSize);
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#if DEBUG
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Log.WriteLine("UnpackSizes:");
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#endif
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for (int i = 0; i < numFolders; i++)
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{
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CFolder folder = folders[i];
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#if DEBUG
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Log.Write(" #" + i + ":");
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#endif
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int numOutStreams = folder.GetNumOutStreams();
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for (int j = 0; j < numOutStreams; j++)
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{
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long size = checked((long)ReadNumber());
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#if DEBUG
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Log.Write(" " + size);
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#endif
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folder._unpackSizes.Add(size);
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}
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#if DEBUG
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Log.WriteLine();
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#endif
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}
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|
|
|
for (;;)
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{
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BlockType? type = ReadId();
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if (type == BlockType.End)
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{
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return;
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}
|
|
|
|
if (type == BlockType.Crc)
|
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{
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List<uint?> crcs = ReadHashDigests(numFolders);
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for (int i = 0; i < numFolders; i++)
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{
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folders[i]._unpackCrc = crcs[i];
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}
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continue;
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}
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|
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SkipData();
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}
|
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}
|
|
finally
|
|
{
|
|
#if DEBUG
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|
Log.PopIndent();
|
|
#endif
|
|
}
|
|
}
|
|
|
|
private void ReadSubStreamsInfo(List<CFolder> folders, out List<int> numUnpackStreamsInFolders,
|
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out List<long> unpackSizes, out List<uint?> digests)
|
|
{
|
|
#if DEBUG
|
|
Log.WriteLine("-- ReadSubStreamsInfo --");
|
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Log.PushIndent();
|
|
#endif
|
|
try
|
|
{
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numUnpackStreamsInFolders = null;
|
|
|
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BlockType? type;
|
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for (;;)
|
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{
|
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type = ReadId();
|
|
if (type == BlockType.NumUnpackStream)
|
|
{
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numUnpackStreamsInFolders = new List<int>(folders.Count);
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#if DEBUG
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|
Log.Write("NumUnpackStreams:");
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#endif
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for (int i = 0; i < folders.Count; i++)
|
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{
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var num = ReadNum();
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#if DEBUG
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Log.Write(" " + num);
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|
#endif
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numUnpackStreamsInFolders.Add(num);
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}
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|
#if DEBUG
|
|
Log.WriteLine();
|
|
#endif
|
|
continue;
|
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}
|
|
if (type == BlockType.Crc || type == BlockType.Size)
|
|
{
|
|
break;
|
|
}
|
|
if (type == BlockType.End)
|
|
{
|
|
break;
|
|
}
|
|
SkipData();
|
|
}
|
|
|
|
if (numUnpackStreamsInFolders == null)
|
|
{
|
|
numUnpackStreamsInFolders = new List<int>(folders.Count);
|
|
for (int i = 0; i < folders.Count; i++)
|
|
{
|
|
numUnpackStreamsInFolders.Add(1);
|
|
}
|
|
}
|
|
|
|
unpackSizes = new List<long>(folders.Count);
|
|
for (int i = 0; i < numUnpackStreamsInFolders.Count; i++)
|
|
{
|
|
// v3.13 incorrectly worked with empty folders
|
|
// v4.07: we check that folder is empty
|
|
int numSubstreams = numUnpackStreamsInFolders[i];
|
|
if (numSubstreams == 0)
|
|
{
|
|
continue;
|
|
}
|
|
#if DEBUG
|
|
Log.Write("#{0} StreamSizes:", i);
|
|
#endif
|
|
long sum = 0;
|
|
for (int j = 1; j < numSubstreams; j++)
|
|
{
|
|
if (type == BlockType.Size)
|
|
{
|
|
long size = checked((long)ReadNumber());
|
|
#if DEBUG
|
|
Log.Write(" " + size);
|
|
#endif
|
|
unpackSizes.Add(size);
|
|
sum += size;
|
|
}
|
|
}
|
|
unpackSizes.Add(folders[i].GetUnpackSize() - sum);
|
|
#if DEBUG
|
|
Log.WriteLine(" - rest: " + unpackSizes.Last());
|
|
#endif
|
|
}
|
|
if (type == BlockType.Size)
|
|
{
|
|
type = ReadId();
|
|
}
|
|
|
|
int numDigests = 0;
|
|
int numDigestsTotal = 0;
|
|
for (int i = 0; i < folders.Count; i++)
|
|
{
|
|
int numSubstreams = numUnpackStreamsInFolders[i];
|
|
if (numSubstreams != 1 || !folders[i].UnpackCrcDefined)
|
|
{
|
|
numDigests += numSubstreams;
|
|
}
|
|
numDigestsTotal += numSubstreams;
|
|
}
|
|
|
|
digests = null;
|
|
|
|
for (;;)
|
|
{
|
|
if (type == BlockType.Crc)
|
|
{
|
|
digests = new List<uint?>(numDigestsTotal);
|
|
|
|
List<uint?> digests2 = ReadHashDigests(numDigests);
|
|
|
|
int digestIndex = 0;
|
|
for (int i = 0; i < folders.Count; i++)
|
|
{
|
|
int numSubstreams = numUnpackStreamsInFolders[i];
|
|
CFolder folder = folders[i];
|
|
if (numSubstreams == 1 && folder.UnpackCrcDefined)
|
|
{
|
|
digests.Add(folder._unpackCrc.Value);
|
|
}
|
|
else
|
|
{
|
|
for (int j = 0; j < numSubstreams; j++, digestIndex++)
|
|
{
|
|
digests.Add(digests2[digestIndex]);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (digestIndex != numDigests || numDigestsTotal != digests.Count)
|
|
{
|
|
Debugger.Break();
|
|
}
|
|
}
|
|
else if (type == BlockType.End)
|
|
{
|
|
if (digests == null)
|
|
{
|
|
digests = new List<uint?>(numDigestsTotal);
|
|
for (int i = 0; i < numDigestsTotal; i++)
|
|
{
|
|
digests.Add(null);
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
else
|
|
{
|
|
SkipData();
|
|
}
|
|
|
|
type = ReadId();
|
|
}
|
|
}
|
|
finally
|
|
{
|
|
#if DEBUG
|
|
Log.PopIndent();
|
|
#endif
|
|
}
|
|
}
|
|
|
|
private void ReadStreamsInfo(
|
|
List<byte[]> dataVector,
|
|
out long dataOffset,
|
|
out List<long> packSizes,
|
|
out List<uint?> packCrCs,
|
|
out List<CFolder> folders,
|
|
out List<int> numUnpackStreamsInFolders,
|
|
out List<long> unpackSizes,
|
|
out List<uint?> digests)
|
|
{
|
|
#if DEBUG
|
|
Log.WriteLine("-- ReadStreamsInfo --");
|
|
Log.PushIndent();
|
|
#endif
|
|
try
|
|
{
|
|
dataOffset = long.MinValue;
|
|
packSizes = null;
|
|
packCrCs = null;
|
|
folders = null;
|
|
numUnpackStreamsInFolders = null;
|
|
unpackSizes = null;
|
|
digests = null;
|
|
|
|
for (;;)
|
|
{
|
|
switch (ReadId())
|
|
{
|
|
case BlockType.End:
|
|
return;
|
|
case BlockType.PackInfo:
|
|
ReadPackInfo(out dataOffset, out packSizes, out packCrCs);
|
|
break;
|
|
case BlockType.UnpackInfo:
|
|
ReadUnpackInfo(dataVector, out folders);
|
|
break;
|
|
case BlockType.SubStreamsInfo:
|
|
ReadSubStreamsInfo(folders, out numUnpackStreamsInFolders, out unpackSizes, out digests);
|
|
break;
|
|
default:
|
|
throw new InvalidOperationException();
|
|
}
|
|
}
|
|
}
|
|
finally
|
|
{
|
|
#if DEBUG
|
|
Log.PopIndent();
|
|
#endif
|
|
}
|
|
}
|
|
|
|
private List<byte[]> ReadAndDecodePackedStreams(long baseOffset, IPasswordProvider pass)
|
|
{
|
|
#if DEBUG
|
|
Log.WriteLine("-- ReadAndDecodePackedStreams --");
|
|
Log.PushIndent();
|
|
#endif
|
|
try
|
|
{
|
|
long dataStartPos;
|
|
List<long> packSizes;
|
|
List<uint?> packCrCs;
|
|
List<CFolder> folders;
|
|
List<int> numUnpackStreamsInFolders;
|
|
List<long> unpackSizes;
|
|
List<uint?> digests;
|
|
|
|
ReadStreamsInfo(null,
|
|
out dataStartPos,
|
|
out packSizes,
|
|
out packCrCs,
|
|
out folders,
|
|
out numUnpackStreamsInFolders,
|
|
out unpackSizes,
|
|
out digests);
|
|
|
|
dataStartPos += baseOffset;
|
|
|
|
var dataVector = new List<byte[]>(folders.Count);
|
|
int packIndex = 0;
|
|
foreach (var folder in folders)
|
|
{
|
|
long oldDataStartPos = dataStartPos;
|
|
long[] myPackSizes = new long[folder._packStreams.Count];
|
|
for (int i = 0; i < myPackSizes.Length; i++)
|
|
{
|
|
long packSize = packSizes[packIndex + i];
|
|
myPackSizes[i] = packSize;
|
|
dataStartPos += packSize;
|
|
}
|
|
|
|
var outStream = DecoderStreamHelper.CreateDecoderStream(_stream, oldDataStartPos, myPackSizes,
|
|
folder, pass);
|
|
|
|
int unpackSize = checked((int)folder.GetUnpackSize());
|
|
byte[] data = new byte[unpackSize];
|
|
outStream.ReadExact(data, 0, data.Length);
|
|
if (outStream.ReadByte() >= 0)
|
|
{
|
|
throw new InvalidOperationException("Decoded stream is longer than expected.");
|
|
}
|
|
dataVector.Add(data);
|
|
|
|
if (folder.UnpackCrcDefined)
|
|
{
|
|
if (Crc.Finish(Crc.Update(Crc.INIT_CRC, data, 0, unpackSize)) != folder._unpackCrc)
|
|
{
|
|
throw new InvalidOperationException("Decoded stream does not match expected CRC.");
|
|
}
|
|
}
|
|
}
|
|
return dataVector;
|
|
}
|
|
finally
|
|
{
|
|
#if DEBUG
|
|
Log.PopIndent();
|
|
#endif
|
|
}
|
|
}
|
|
|
|
private void ReadHeader(ArchiveDatabase db, IPasswordProvider getTextPassword)
|
|
{
|
|
#if DEBUG
|
|
Log.WriteLine("-- ReadHeader --");
|
|
Log.PushIndent();
|
|
#endif
|
|
try
|
|
{
|
|
BlockType? type = ReadId();
|
|
|
|
if (type == BlockType.ArchiveProperties)
|
|
{
|
|
ReadArchiveProperties();
|
|
type = ReadId();
|
|
}
|
|
|
|
List<byte[]> dataVector = null;
|
|
if (type == BlockType.AdditionalStreamsInfo)
|
|
{
|
|
dataVector = ReadAndDecodePackedStreams(db._startPositionAfterHeader, getTextPassword);
|
|
type = ReadId();
|
|
}
|
|
|
|
List<long> unpackSizes;
|
|
List<uint?> digests;
|
|
|
|
if (type == BlockType.MainStreamsInfo)
|
|
{
|
|
ReadStreamsInfo(dataVector,
|
|
out db._dataStartPosition,
|
|
out db._packSizes,
|
|
out db._packCrCs,
|
|
out db._folders,
|
|
out db._numUnpackStreamsVector,
|
|
out unpackSizes,
|
|
out digests);
|
|
|
|
db._dataStartPosition += db._startPositionAfterHeader;
|
|
type = ReadId();
|
|
}
|
|
else
|
|
{
|
|
unpackSizes = new List<long>(db._folders.Count);
|
|
digests = new List<uint?>(db._folders.Count);
|
|
db._numUnpackStreamsVector = new List<int>(db._folders.Count);
|
|
for (int i = 0; i < db._folders.Count; i++)
|
|
{
|
|
var folder = db._folders[i];
|
|
unpackSizes.Add(folder.GetUnpackSize());
|
|
digests.Add(folder._unpackCrc);
|
|
db._numUnpackStreamsVector.Add(1);
|
|
}
|
|
}
|
|
|
|
db._files.Clear();
|
|
|
|
if (type == BlockType.End)
|
|
{
|
|
return;
|
|
}
|
|
|
|
if (type != BlockType.FilesInfo)
|
|
{
|
|
throw new InvalidOperationException();
|
|
}
|
|
|
|
int numFiles = ReadNum();
|
|
#if DEBUG
|
|
Log.WriteLine("NumFiles: " + numFiles);
|
|
#endif
|
|
db._files = new List<CFileItem>(numFiles);
|
|
for (int i = 0; i < numFiles; i++)
|
|
{
|
|
db._files.Add(new CFileItem());
|
|
}
|
|
|
|
BitVector emptyStreamVector = new BitVector(numFiles);
|
|
BitVector emptyFileVector = null;
|
|
BitVector antiFileVector = null;
|
|
int numEmptyStreams = 0;
|
|
|
|
for (;;)
|
|
{
|
|
type = ReadId();
|
|
if (type == BlockType.End)
|
|
{
|
|
break;
|
|
}
|
|
|
|
long size = checked((long)ReadNumber()); // TODO: throw invalid data on negative
|
|
int oldPos = _currentReader.Offset;
|
|
switch (type)
|
|
{
|
|
case BlockType.Name:
|
|
using (var streamSwitch = new CStreamSwitch())
|
|
{
|
|
streamSwitch.Set(this, dataVector);
|
|
#if DEBUG
|
|
Log.Write("FileNames:");
|
|
#endif
|
|
for (int i = 0; i < db._files.Count; i++)
|
|
{
|
|
db._files[i].Name = _currentReader.ReadString();
|
|
#if DEBUG
|
|
Log.Write(" " + db._files[i].Name);
|
|
#endif
|
|
}
|
|
#if DEBUG
|
|
Log.WriteLine();
|
|
#endif
|
|
}
|
|
break;
|
|
case BlockType.WinAttributes:
|
|
#if DEBUG
|
|
Log.Write("WinAttributes:");
|
|
#endif
|
|
ReadAttributeVector(dataVector, numFiles, delegate(int i, uint? attr)
|
|
{
|
|
// Some third party implementations established an unofficial extension
|
|
// of the 7z archive format by placing posix file attributes in the high
|
|
// bits of the windows file attributes. This makes use of the fact that
|
|
// the official implementation does not perform checks on this value.
|
|
//
|
|
// Newer versions of the official 7z GUI client will try to parse this
|
|
// extension, thus acknowledging the unofficial use of these bits.
|
|
//
|
|
// For us it is safe to just discard the upper bits if they are set and
|
|
// keep the windows attributes from the lower bits (which should be set
|
|
// properly even if posix file attributes are present, in order to be
|
|
// compatible with older 7z archive readers)
|
|
//
|
|
// Note that the 15th bit is used by some implementations to indicate
|
|
// presence of the extension, but not all implementations do that so
|
|
// we can't trust that bit and must ignore it.
|
|
//
|
|
if (attr.HasValue && (attr.Value >> 16) != 0)
|
|
{
|
|
attr = attr.Value & 0x7FFFu;
|
|
}
|
|
|
|
db._files[i].Attrib = attr;
|
|
#if DEBUG
|
|
Log.Write(" " + (attr.HasValue ? attr.Value.ToString("x8") : "n/a"));
|
|
#endif
|
|
});
|
|
#if DEBUG
|
|
Log.WriteLine();
|
|
#endif
|
|
break;
|
|
case BlockType.EmptyStream:
|
|
emptyStreamVector = ReadBitVector(numFiles);
|
|
#if DEBUG
|
|
|
|
Log.Write("EmptyStream: ");
|
|
#endif
|
|
for (int i = 0; i < emptyStreamVector.Length; i++)
|
|
{
|
|
if (emptyStreamVector[i])
|
|
{
|
|
#if DEBUG
|
|
Log.Write("x");
|
|
#endif
|
|
numEmptyStreams++;
|
|
}
|
|
else
|
|
{
|
|
#if DEBUG
|
|
Log.Write(".");
|
|
#endif
|
|
}
|
|
}
|
|
#if DEBUG
|
|
Log.WriteLine();
|
|
#endif
|
|
|
|
emptyFileVector = new BitVector(numEmptyStreams);
|
|
antiFileVector = new BitVector(numEmptyStreams);
|
|
break;
|
|
case BlockType.EmptyFile:
|
|
emptyFileVector = ReadBitVector(numEmptyStreams);
|
|
#if DEBUG
|
|
Log.Write("EmptyFile: ");
|
|
for (int i = 0; i < numEmptyStreams; i++)
|
|
{
|
|
Log.Write(emptyFileVector[i] ? "x" : ".");
|
|
}
|
|
Log.WriteLine();
|
|
#endif
|
|
break;
|
|
case BlockType.Anti:
|
|
antiFileVector = ReadBitVector(numEmptyStreams);
|
|
#if DEBUG
|
|
Log.Write("Anti: ");
|
|
for (int i = 0; i < numEmptyStreams; i++)
|
|
{
|
|
Log.Write(antiFileVector[i] ? "x" : ".");
|
|
}
|
|
Log.WriteLine();
|
|
#endif
|
|
break;
|
|
case BlockType.StartPos:
|
|
#if DEBUG
|
|
Log.Write("StartPos:");
|
|
#endif
|
|
ReadNumberVector(dataVector, numFiles, delegate(int i, long? startPos)
|
|
{
|
|
db._files[i].StartPos = startPos;
|
|
#if DEBUG
|
|
Log.Write(" " + (startPos.HasValue ? startPos.Value.ToString() : "n/a"));
|
|
#endif
|
|
});
|
|
#if DEBUG
|
|
Log.WriteLine();
|
|
#endif
|
|
break;
|
|
case BlockType.CTime:
|
|
#if DEBUG
|
|
Log.Write("CTime:");
|
|
#endif
|
|
ReadDateTimeVector(dataVector, numFiles, delegate(int i, DateTime? time)
|
|
{
|
|
db._files[i].CTime = time;
|
|
#if DEBUG
|
|
Log.Write(" " + (time.HasValue ? time.Value.ToString() : "n/a"));
|
|
#endif
|
|
});
|
|
#if DEBUG
|
|
Log.WriteLine();
|
|
#endif
|
|
break;
|
|
case BlockType.ATime:
|
|
#if DEBUG
|
|
Log.Write("ATime:");
|
|
#endif
|
|
ReadDateTimeVector(dataVector, numFiles, delegate(int i, DateTime? time)
|
|
{
|
|
db._files[i].ATime = time;
|
|
#if DEBUG
|
|
Log.Write(" " + (time.HasValue ? time.Value.ToString() : "n/a"));
|
|
#endif
|
|
});
|
|
#if DEBUG
|
|
Log.WriteLine();
|
|
#endif
|
|
break;
|
|
case BlockType.MTime:
|
|
#if DEBUG
|
|
Log.Write("MTime:");
|
|
#endif
|
|
ReadDateTimeVector(dataVector, numFiles, delegate(int i, DateTime? time)
|
|
{
|
|
db._files[i].MTime = time;
|
|
#if DEBUG
|
|
Log.Write(" " + (time.HasValue ? time.Value.ToString() : "n/a"));
|
|
#endif
|
|
});
|
|
#if DEBUG
|
|
Log.WriteLine();
|
|
#endif
|
|
break;
|
|
case BlockType.Dummy:
|
|
#if DEBUG
|
|
Log.Write("Dummy: " + size);
|
|
#endif
|
|
for (long j = 0; j < size; j++)
|
|
{
|
|
if (ReadByte() != 0)
|
|
{
|
|
throw new InvalidOperationException();
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
SkipData(size);
|
|
break;
|
|
}
|
|
|
|
// since 0.3 record sizes must be correct
|
|
bool checkRecordsSize = (db._majorVersion > 0 || db._minorVersion > 2);
|
|
if (checkRecordsSize && _currentReader.Offset - oldPos != size)
|
|
{
|
|
throw new InvalidOperationException();
|
|
}
|
|
}
|
|
|
|
int emptyFileIndex = 0;
|
|
int sizeIndex = 0;
|
|
for (int i = 0; i < numFiles; i++)
|
|
{
|
|
CFileItem file = db._files[i];
|
|
file.HasStream = !emptyStreamVector[i];
|
|
if (file.HasStream)
|
|
{
|
|
file.IsDir = false;
|
|
file.IsAnti = false;
|
|
file.Size = unpackSizes[sizeIndex];
|
|
file.Crc = digests[sizeIndex];
|
|
sizeIndex++;
|
|
}
|
|
else
|
|
{
|
|
file.IsDir = !emptyFileVector[emptyFileIndex];
|
|
file.IsAnti = antiFileVector[emptyFileIndex];
|
|
emptyFileIndex++;
|
|
file.Size = 0;
|
|
file.Crc = null;
|
|
}
|
|
}
|
|
}
|
|
finally
|
|
{
|
|
#if DEBUG
|
|
Log.PopIndent();
|
|
#endif
|
|
}
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Public Methods
|
|
|
|
public void Open(Stream stream)
|
|
{
|
|
Close();
|
|
|
|
_streamOrigin = stream.Position;
|
|
_streamEnding = stream.Length;
|
|
|
|
// TODO: Check Signature!
|
|
_header = new byte[0x20];
|
|
for (int offset = 0; offset < 0x20;)
|
|
{
|
|
int delta = stream.Read(_header, offset, 0x20 - offset);
|
|
if (delta == 0)
|
|
{
|
|
throw new EndOfStreamException();
|
|
}
|
|
offset += delta;
|
|
}
|
|
|
|
_stream = stream;
|
|
}
|
|
|
|
public void Close()
|
|
{
|
|
if (_stream != null)
|
|
{
|
|
_stream.Dispose();
|
|
}
|
|
|
|
foreach (var stream in _cachedStreams.Values)
|
|
{
|
|
stream.Dispose();
|
|
}
|
|
|
|
_cachedStreams.Clear();
|
|
}
|
|
|
|
public ArchiveDatabase ReadDatabase(IPasswordProvider pass)
|
|
{
|
|
var db = new ArchiveDatabase(pass);
|
|
db.Clear();
|
|
|
|
db._majorVersion = _header[6];
|
|
db._minorVersion = _header[7];
|
|
|
|
if (db._majorVersion != 0)
|
|
{
|
|
throw new InvalidOperationException();
|
|
}
|
|
|
|
uint crcFromArchive = DataReader.Get32(_header, 8);
|
|
long nextHeaderOffset = (long)DataReader.Get64(_header, 0xC);
|
|
long nextHeaderSize = (long)DataReader.Get64(_header, 0x14);
|
|
uint nextHeaderCrc = DataReader.Get32(_header, 0x1C);
|
|
|
|
uint crc = Crc.INIT_CRC;
|
|
crc = Crc.Update(crc, nextHeaderOffset);
|
|
crc = Crc.Update(crc, nextHeaderSize);
|
|
crc = Crc.Update(crc, nextHeaderCrc);
|
|
crc = Crc.Finish(crc);
|
|
|
|
if (crc != crcFromArchive)
|
|
{
|
|
throw new InvalidOperationException();
|
|
}
|
|
|
|
db._startPositionAfterHeader = _streamOrigin + 0x20;
|
|
|
|
// empty header is ok
|
|
if (nextHeaderSize == 0)
|
|
{
|
|
db.Fill();
|
|
return db;
|
|
}
|
|
|
|
if (nextHeaderOffset < 0 || nextHeaderSize < 0 || nextHeaderSize > Int32.MaxValue)
|
|
{
|
|
throw new InvalidOperationException();
|
|
}
|
|
|
|
if (nextHeaderOffset > _streamEnding - db._startPositionAfterHeader)
|
|
{
|
|
throw new IndexOutOfRangeException();
|
|
}
|
|
|
|
_stream.Seek(nextHeaderOffset, SeekOrigin.Current);
|
|
|
|
byte[] header = new byte[nextHeaderSize];
|
|
_stream.ReadExact(header, 0, header.Length);
|
|
|
|
if (Crc.Finish(Crc.Update(Crc.INIT_CRC, header, 0, header.Length)) != nextHeaderCrc)
|
|
{
|
|
throw new InvalidOperationException();
|
|
}
|
|
|
|
using (CStreamSwitch streamSwitch = new CStreamSwitch())
|
|
{
|
|
streamSwitch.Set(this, header);
|
|
|
|
BlockType? type = ReadId();
|
|
if (type != BlockType.Header)
|
|
{
|
|
if (type != BlockType.EncodedHeader)
|
|
{
|
|
throw new InvalidOperationException();
|
|
}
|
|
|
|
var dataVector = ReadAndDecodePackedStreams(db._startPositionAfterHeader, db.PasswordProvider);
|
|
|
|
// compressed header without content is odd but ok
|
|
if (dataVector.Count == 0)
|
|
{
|
|
db.Fill();
|
|
return db;
|
|
}
|
|
|
|
if (dataVector.Count != 1)
|
|
{
|
|
throw new InvalidOperationException();
|
|
}
|
|
|
|
streamSwitch.Set(this, dataVector[0]);
|
|
|
|
if (ReadId() != BlockType.Header)
|
|
{
|
|
throw new InvalidOperationException();
|
|
}
|
|
}
|
|
|
|
ReadHeader(db, db.PasswordProvider);
|
|
}
|
|
db.Fill();
|
|
return db;
|
|
}
|
|
|
|
internal class CExtractFolderInfo
|
|
{
|
|
internal int _fileIndex;
|
|
internal int _folderIndex;
|
|
internal List<bool> _extractStatuses = new List<bool>();
|
|
|
|
internal CExtractFolderInfo(int fileIndex, int folderIndex)
|
|
{
|
|
_fileIndex = fileIndex;
|
|
_folderIndex = folderIndex;
|
|
if (fileIndex != -1)
|
|
{
|
|
_extractStatuses.Add(true);
|
|
}
|
|
}
|
|
}
|
|
|
|
private class FolderUnpackStream : Stream
|
|
{
|
|
private readonly ArchiveDatabase _db;
|
|
private readonly int _startIndex;
|
|
private readonly List<bool> _extractStatuses;
|
|
|
|
public FolderUnpackStream(ArchiveDatabase db, int p, int startIndex, List<bool> list)
|
|
{
|
|
_db = db;
|
|
_startIndex = startIndex;
|
|
_extractStatuses = list;
|
|
}
|
|
|
|
#region Stream
|
|
|
|
public override bool CanRead => true;
|
|
|
|
public override bool CanSeek => false;
|
|
|
|
public override bool CanWrite => false;
|
|
|
|
public override void Flush()
|
|
{
|
|
throw new NotSupportedException();
|
|
}
|
|
|
|
public override long Length => throw new NotSupportedException();
|
|
|
|
public override long Position { get => throw new NotSupportedException(); set => throw new NotSupportedException(); }
|
|
|
|
public override int Read(byte[] buffer, int offset, int count)
|
|
{
|
|
throw new NotSupportedException();
|
|
}
|
|
|
|
public override long Seek(long offset, SeekOrigin origin)
|
|
{
|
|
throw new NotSupportedException();
|
|
}
|
|
|
|
public override void SetLength(long value)
|
|
{
|
|
throw new NotSupportedException();
|
|
}
|
|
|
|
private Stream _stream;
|
|
private long _rem;
|
|
private int _currentIndex;
|
|
|
|
private void ProcessEmptyFiles()
|
|
{
|
|
while (_currentIndex < _extractStatuses.Count && _db._files[_startIndex + _currentIndex].Size == 0)
|
|
{
|
|
OpenFile();
|
|
_stream.Dispose();
|
|
_stream = null;
|
|
_currentIndex++;
|
|
}
|
|
}
|
|
|
|
private void OpenFile()
|
|
{
|
|
int index = _startIndex + _currentIndex;
|
|
#if DEBUG
|
|
Log.WriteLine(_db._files[index].Name);
|
|
#endif
|
|
if (_db._files[index].CrcDefined)
|
|
{
|
|
_stream = new CrcCheckStream(_db._files[index].Crc.Value);
|
|
}
|
|
else
|
|
{
|
|
_stream = new MemoryStream();
|
|
}
|
|
_rem = _db._files[index].Size;
|
|
}
|
|
|
|
public override void Write(byte[] buffer, int offset, int count)
|
|
{
|
|
while (count != 0)
|
|
{
|
|
if (_stream != null)
|
|
{
|
|
int write = count;
|
|
if (write > _rem)
|
|
{
|
|
write = (int)_rem;
|
|
}
|
|
_stream.Write(buffer, offset, write);
|
|
count -= write;
|
|
_rem -= write;
|
|
offset += write;
|
|
if (_rem == 0)
|
|
{
|
|
_stream.Dispose();
|
|
_stream = null;
|
|
_currentIndex++;
|
|
ProcessEmptyFiles();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
ProcessEmptyFiles();
|
|
if (_currentIndex == _extractStatuses.Count)
|
|
{
|
|
// we support partial extracting
|
|
Debugger.Break();
|
|
throw new NotSupportedException();
|
|
}
|
|
OpenFile();
|
|
}
|
|
}
|
|
}
|
|
|
|
#endregion
|
|
}
|
|
|
|
private Stream GetCachedDecoderStream(ArchiveDatabase db, int folderIndex)
|
|
{
|
|
Stream s;
|
|
if (!_cachedStreams.TryGetValue(folderIndex, out s))
|
|
{
|
|
CFolder folderInfo = db._folders[folderIndex];
|
|
int packStreamIndex = db._folders[folderIndex]._firstPackStreamId;
|
|
long folderStartPackPos = db.GetFolderStreamPos(folderInfo, 0);
|
|
List<long> packSizes = new List<long>();
|
|
for (int j = 0; j < folderInfo._packStreams.Count; j++)
|
|
{
|
|
packSizes.Add(db._packSizes[packStreamIndex + j]);
|
|
}
|
|
|
|
s = DecoderStreamHelper.CreateDecoderStream(_stream, folderStartPackPos, packSizes.ToArray(), folderInfo,
|
|
db.PasswordProvider);
|
|
_cachedStreams.Add(folderIndex, s);
|
|
}
|
|
return s;
|
|
}
|
|
|
|
public Stream OpenStream(ArchiveDatabase db, int fileIndex)
|
|
{
|
|
int folderIndex = db._fileIndexToFolderIndexMap[fileIndex];
|
|
int numFilesInFolder = db._numUnpackStreamsVector[folderIndex];
|
|
int firstFileIndex = db._folderStartFileIndex[folderIndex];
|
|
if (firstFileIndex > fileIndex || fileIndex - firstFileIndex >= numFilesInFolder)
|
|
{
|
|
throw new InvalidOperationException();
|
|
}
|
|
|
|
int skipCount = fileIndex - firstFileIndex;
|
|
long skipSize = 0;
|
|
for (int i = 0; i < skipCount; i++)
|
|
{
|
|
skipSize += db._files[firstFileIndex + i].Size;
|
|
}
|
|
|
|
Stream s = GetCachedDecoderStream(db, folderIndex);
|
|
s.Position = skipSize;
|
|
return new ReadOnlySubStream(s, db._files[fileIndex].Size);
|
|
}
|
|
|
|
public void Extract(ArchiveDatabase db, int[] indices)
|
|
{
|
|
int numItems;
|
|
bool allFilesMode = (indices == null);
|
|
if (allFilesMode)
|
|
{
|
|
numItems = db._files.Count;
|
|
}
|
|
else
|
|
{
|
|
numItems = indices.Length;
|
|
}
|
|
|
|
if (numItems == 0)
|
|
{
|
|
return;
|
|
}
|
|
|
|
List<CExtractFolderInfo> extractFolderInfoVector = new List<CExtractFolderInfo>();
|
|
for (int i = 0; i < numItems; i++)
|
|
{
|
|
int fileIndex = allFilesMode ? i : indices[i];
|
|
|
|
int folderIndex = db._fileIndexToFolderIndexMap[fileIndex];
|
|
if (folderIndex == -1)
|
|
{
|
|
extractFolderInfoVector.Add(new CExtractFolderInfo(fileIndex, -1));
|
|
continue;
|
|
}
|
|
|
|
if (extractFolderInfoVector.Count == 0 || folderIndex != extractFolderInfoVector.Last()._folderIndex)
|
|
{
|
|
extractFolderInfoVector.Add(new CExtractFolderInfo(-1, folderIndex));
|
|
}
|
|
|
|
CExtractFolderInfo efi = extractFolderInfoVector.Last();
|
|
|
|
int startIndex = db._folderStartFileIndex[folderIndex];
|
|
for (int index = efi._extractStatuses.Count; index <= fileIndex - startIndex; index++)
|
|
{
|
|
efi._extractStatuses.Add(index == fileIndex - startIndex);
|
|
}
|
|
}
|
|
|
|
foreach (CExtractFolderInfo efi in extractFolderInfoVector)
|
|
{
|
|
int startIndex;
|
|
if (efi._fileIndex != -1)
|
|
{
|
|
startIndex = efi._fileIndex;
|
|
}
|
|
else
|
|
{
|
|
startIndex = db._folderStartFileIndex[efi._folderIndex];
|
|
}
|
|
|
|
var outStream = new FolderUnpackStream(db, 0, startIndex, efi._extractStatuses);
|
|
|
|
if (efi._fileIndex != -1)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
int folderIndex = efi._folderIndex;
|
|
CFolder folderInfo = db._folders[folderIndex];
|
|
|
|
int packStreamIndex = db._folders[folderIndex]._firstPackStreamId;
|
|
long folderStartPackPos = db.GetFolderStreamPos(folderInfo, 0);
|
|
|
|
List<long> packSizes = new List<long>();
|
|
for (int j = 0; j < folderInfo._packStreams.Count; j++)
|
|
{
|
|
packSizes.Add(db._packSizes[packStreamIndex + j]);
|
|
}
|
|
|
|
// TODO: If the decoding fails the last file may be extracted incompletely. Delete it?
|
|
|
|
Stream s = DecoderStreamHelper.CreateDecoderStream(_stream, folderStartPackPos, packSizes.ToArray(),
|
|
folderInfo, db.PasswordProvider);
|
|
byte[] buffer = new byte[4 << 10];
|
|
for (;;)
|
|
{
|
|
int processed = s.Read(buffer, 0, buffer.Length);
|
|
if (processed == 0)
|
|
{
|
|
break;
|
|
}
|
|
outStream.Write(buffer, 0, processed);
|
|
}
|
|
}
|
|
}
|
|
|
|
public IEnumerable<CFileItem> GetFiles(ArchiveDatabase db)
|
|
{
|
|
return db._files;
|
|
}
|
|
|
|
public int GetFileIndex(ArchiveDatabase db, CFileItem item)
|
|
{
|
|
return db._files.IndexOf(item);
|
|
}
|
|
|
|
#endregion
|
|
}
|
|
}
|