public RarPackedFileBlock(SrrBlockHeader srrBlockHeader, long startOffset, ref BinaryReader reader) : base(srrBlockHeader, startOffset, ref reader)
{
//this.PackedSize = reader.ReadUInt32(); //already read when reading "addsize"
this.PackedSize = this.SrrBlockHeader.AddSize;
this.UnpackedSize = reader.ReadUInt32();
reader.ReadByte(); //os (skip)
this.FileCrc = reader.ReadUInt32();
reader.ReadUInt32(); //datetime (skip)
reader.ReadByte(); //unpackVersion (skip)
this.CompressionMethod = reader.ReadByte();
ushort nameLength = reader.ReadUInt16();
reader.ReadUInt32(); //file attributes (skip)
// if large file flag is set, next are 4 bytes each for high order bits of file sizes
if ((this.SrrBlockHeader.Flags & 0x100) != 0)
{
//read additional bytes
this.PackedSize += reader.ReadUInt32() * 0x100000000ul;
this.UnpackedSize += reader.ReadUInt32() * 0x100000000ul;
}
this.FileName = new string(reader.ReadChars(nameLength));
// the file name can be null-terminated, especially in the case of utf-encoded ones. cut it off if necessary
if (this.FileName.IndexOf('\0') >= 0)
{
this.FileName = this.FileName.Substring(0, this.FileName.IndexOf('\0'));
}
}
//public SrrHeaderBlock(byte[] blockBytes, long filePos) : base(blockBytes, filePos)
public SrrHeaderBlock(SrrBlockHeader srrBlockHeader, long startOffset, ref BinaryReader reader) : base(srrBlockHeader, startOffset, ref reader)
{
this.AppName = new string(reader.ReadChars(reader.ReadUInt16()));
//ushort fileNameLength = BitConverter.ToUInt16(blockBytes, 7);
//byte[] fileName = new byte[fileNameLength];
//Buffer.BlockCopy(blockBytes, 9, fileName, 0, fileNameLength);
//this.AppName = Encoding.UTF8.GetString(fileName);
}
public RarOldRecoveryBlock(SrrBlockHeader srrBlockHeader, long startOffset, ref BinaryReader reader) : base(srrBlockHeader, startOffset, ref reader)
{
this.PackedSize = reader.ReadUInt32();
reader.BaseStream.Seek(1, SeekOrigin.Current); //rar version
this.RecoverySectors = reader.ReadUInt16();
this.DataSectors = reader.ReadUInt32();
}
public RarVolumeHeaderBlock(SrrBlockHeader srrBlockHeader, long startOffset, ref BinaryReader reader) : base(srrBlockHeader, startOffset, ref reader)
{
}
public SrrRarFileBlock(SrrBlockHeader srrBlockHeader, long startOffset, ref BinaryReader reader) : base(srrBlockHeader, startOffset, ref reader)
{
this.FileName = new string(reader.ReadChars(reader.ReadUInt16()));
}
public SrrStoredFileBlock(SrrBlockHeader srrBlockHeader, long startOffset, ref BinaryReader reader) : base(srrBlockHeader, startOffset, ref reader)
{
this.FileName = new string(reader.ReadChars(reader.ReadUInt16()));
this.FileOffset = reader.BaseStream.Position;
this.FileLength = this.SrrBlockHeader.AddSize;
}
public RarRecoveryBlock(SrrBlockHeader srrBlockHeader, long startOffset, ref BinaryReader reader) : base(srrBlockHeader, startOffset, ref reader)
{
this.FileName = new string(reader.ReadChars(8)); //'Protect+', overwrites 'RR'
this.RecoverySectors = reader.ReadUInt32();
this.DataSectors = reader.ReadUInt64();
}
public Block(SrrBlockHeader srrBlockHeader, long startOffset, ref BinaryReader reader)
{
this.BlockPosition = startOffset;
this.SrrBlockHeader = srrBlockHeader;
}
private void ReadSrr_New(BinaryReader reader)
{
this.FileSize = reader.BaseStream.Length;
SrrRarFileBlock currentRarFile = null;
while (reader.BaseStream.Position < reader.BaseStream.Length)
{
long startOffset = reader.BaseStream.Position;
byte[] header = reader.ReadBytes(HEADERLENGTH);
SrrBlockHeader srrBlockHeader = new SrrBlockHeader
{
HeaderCrc = BitConverter.ToUInt16(header, 0),
BlockType = Enum.IsDefined(typeof(RarBlockType), header[2]) ? (RarBlockType)header[2] : RarBlockType.Unknown,
Flags = BitConverter.ToUInt16(header, 3),
HeaderSize = BitConverter.ToUInt16(header, 5)
};
int addSizeFlag = srrBlockHeader.Flags & 0x8000;
if (addSizeFlag > 0 || srrBlockHeader.BlockType == RarBlockType.RarPackedFile || srrBlockHeader.BlockType == RarBlockType.RarNewSub)
{
srrBlockHeader.AddSize = reader.ReadUInt32();
}
//calculate rar file size
if (currentRarFile != null && srrBlockHeader.BlockType != RarBlockType.SrrRarFile)
{
currentRarFile.FileLength += srrBlockHeader.FullSize;
}
switch (srrBlockHeader.BlockType)
{
case RarBlockType.SrrHeader:
this.BlockList.Add(new SrrHeaderBlock(srrBlockHeader, startOffset, ref reader));
break;
case RarBlockType.SrrStoredFile:
SrrStoredFileBlock srrStoredFileBlock = new SrrStoredFileBlock(srrBlockHeader, startOffset, ref reader);
this.BlockList.Add(srrStoredFileBlock);
reader.ReadBytes((int)srrBlockHeader.AddSize); //skip stored file data
break;
case RarBlockType.SrrRarFile:
currentRarFile = new SrrRarFileBlock(srrBlockHeader, startOffset, ref reader);
this.BlockList.Add(currentRarFile);
break;
case RarBlockType.RarVolumeHeader:
this.BlockList.Add(new RarVolumeHeaderBlock(srrBlockHeader, startOffset, ref reader));
reader.ReadBytes((int)srrBlockHeader.HeaderSize - HEADERLENGTH); //this skip block?
break;
case RarBlockType.RarPackedFile:
RarPackedFileBlock rarPackedFileBlock = new RarPackedFileBlock(srrBlockHeader, startOffset, ref reader);
this.BlockList.Add(rarPackedFileBlock);
reader.BaseStream.Seek(startOffset + rarPackedFileBlock.SrrBlockHeader.HeaderSize, SeekOrigin.Begin);
break;
case RarBlockType.RarOldRecovery:
this.BlockList.Add(new RarOldRecoveryBlock(srrBlockHeader, startOffset, ref reader));
break;
case RarBlockType.RarNewSub:
//if (isRecovery)
if (true)
{
RarRecoveryBlock rarRecoveryBlock = new RarRecoveryBlock(srrBlockHeader, startOffset, ref reader); //BROKEN 2020-11-22 04:18:00
this.BlockList.Add(rarRecoveryBlock);
reader.BaseStream.Seek(startOffset + rarRecoveryBlock.SrrBlockHeader.HeaderSize, SeekOrigin.Begin);
}
else
{
this.BlockList.Add(new Block(srrBlockHeader, startOffset, ref reader));
}
break;
case RarBlockType.Unknown: //TODO: fix
break;
case RarBlockType.SrrOsoHash: //wont implement
case RarBlockType.RarMin:
case RarBlockType.RarMax:
case RarBlockType.OldComment:
case RarBlockType.OldAuthenticity1:
case RarBlockType.OldSubblock:
case RarBlockType.OldAuthenticity2:
//case RarBlockType.SrrRarPadding:
reader.ReadBytes(srrBlockHeader.HeaderSize - 7); //skip block
break;
default:
//new Block(srrBlockHeader, startOffset, ref reader);
reader.BaseStream.Seek(startOffset + srrBlockHeader.FullSize, SeekOrigin.Begin);
break;
}
}
//sfv processing
foreach (SrrFileInfo sfvFile in this.StoredFileInfos.Where(x => x.FileName.ToLower().EndsWith(".sfv")))
{
byte[] sfvData = this.GetStoredFileData(sfvFile.FileName);
this.ProcessSfv(Encoding.UTF8.GetString(sfvData));
}
}
