internal ZipArchiveEntry(ZipArchive archive, ZipCentralDirectoryFileHeader cd)
{
this._archive = archive;
this._originallyInArchive = true;
this._diskNumberStart = cd.DiskNumberStart;
this._versionToExtract = (ZipVersionNeededValues)cd.VersionNeededToExtract;
this._generalPurposeBitFlag = (ZipArchiveEntry.BitFlagValues)cd.GeneralPurposeBitFlag;
this.CompressionMethod = (ZipArchiveEntry.CompressionMethodValues)cd.CompressionMethod;
this._lastModified = new DateTimeOffset(ZipHelper.DosTimeToDateTime(cd.LastModified));
this._compressedSize = cd.CompressedSize;
this._uncompressedSize = cd.UncompressedSize;
this._externalFileAttr = cd.ExternalFileAttributes;
this._offsetOfLocalHeader = cd.RelativeOffsetOfLocalHeader;
this._storedOffsetOfCompressedData = null;
this._crc32 = cd.Crc32;
this._compressedBytes = null;
this._storedUncompressedData = null;
this._currentlyOpenForWrite = false;
this._everOpenedForWrite = false;
this._outstandingWriteStream = null;
this.FullName = this.DecodeEntryName(cd.Filename);
this._lhUnknownExtraFields = null;
this._cdUnknownExtraFields = cd.ExtraFields;
this._fileComment = cd.FileComment;
this._compressionLevel = null;
}
private void ReadCentralDirectory()
{
try
{
//assume ReadEndOfCentralDirectory has been called and has populated _centralDirectoryStart
_archiveStream.Seek(_centralDirectoryStart, SeekOrigin.Begin);
long numberOfEntries = 0;
//read the central directory
ZipCentralDirectoryFileHeader currentHeader;
bool saveExtraFieldsAndComments = Mode == ZipArchiveMode.Update;
while (ZipCentralDirectoryFileHeader.TryReadBlock(_archiveReader,
saveExtraFieldsAndComments, out currentHeader))
{
AddEntry(new ZipArchiveEntry(this, currentHeader));
numberOfEntries++;
}
if (numberOfEntries != _expectedNumberOfEntries)
{
throw new InvalidDataException(SR.NumEntriesWrong);
}
}
catch (EndOfStreamException ex)
{
throw new InvalidDataException(SR.Format(SR.CentralDirectoryInvalid, ex));
}
}
//Initializes, attaches it to archive
internal ZipArchiveEntry(ZipArchive archive, ZipCentralDirectoryFileHeader cd)
{
_archive = archive;
_originallyInArchive = true;
_diskNumberStart = cd.DiskNumberStart;
_versionToExtract = (ZipVersionNeededValues)cd.VersionNeededToExtract;
_generalPurposeBitFlag = (BitFlagValues)cd.GeneralPurposeBitFlag;
CompressionMethod = (CompressionMethodValues)cd.CompressionMethod;
_lastModified = new DateTimeOffset(ZipHelper.DosTimeToDateTime(cd.LastModified));
_compressedSize = cd.CompressedSize;
_uncompressedSize = cd.UncompressedSize;
_offsetOfLocalHeader = cd.RelativeOffsetOfLocalHeader;
/* we don't know this yet: should be _offsetOfLocalHeader + 30 + _storedEntryNameBytes.Length + extrafieldlength
* but entryname/extra length could be different in LH
*/
_storedOffsetOfCompressedData = null;
_crc32 = cd.Crc32;
_compressedBytes = null;
_storedUncompressedData = null;
_currentlyOpenForWrite = false;
_everOpenedForWrite = false;
_outstandingWriteStream = null;
FullName = DecodeEntryName(cd.Filename);
_lhUnknownExtraFields = null;
//the cd should have these as null if we aren't in Update mode
_cdUnknownExtraFields = cd.ExtraFields;
_fileComment = cd.FileComment;
_compressionLevel = null;
}
//Initializes, attaches it to archive
internal ZipArchiveEntry(ZipArchive archive, ZipCentralDirectoryFileHeader cd, CompressionLevel compressionLevel)
: this(archive, cd)
{
// Checking of compressionLevel is passed down to DeflateStream and the IDeflater implementation
// as it is a pugable component that completely encapsulates the meaning of compressionLevel.
_compressionLevel = compressionLevel;
}
// Initializes, attaches it to archive
internal ZipArchiveEntry(ZipArchive archive, ZipCentralDirectoryFileHeader cd)
{
_archive = archive;
_originallyInArchive = true;
_diskNumberStart = cd.DiskNumberStart;
_versionMadeByPlatform = (ZipVersionMadeByPlatform)cd.VersionMadeByCompatibility;
_versionMadeBySpecification = (ZipVersionNeededValues)cd.VersionMadeBySpecification;
_versionToExtract = (ZipVersionNeededValues)cd.VersionNeededToExtract;
_generalPurposeBitFlag = (BitFlagValues)cd.GeneralPurposeBitFlag;
CompressionMethod = (CompressionMethodValues)cd.CompressionMethod;
_lastModified = new DateTimeOffset(ZipHelper.DosTimeToDateTime(cd.LastModified));
_compressedSize = cd.CompressedSize;
_uncompressedSize = cd.UncompressedSize;
_externalFileAttr = cd.ExternalFileAttributes;
_offsetOfLocalHeader = cd.RelativeOffsetOfLocalHeader;
// we don't know this yet: should be _offsetOfLocalHeader + 30 + _storedEntryNameBytes.Length + extrafieldlength
// but entryname/extra length could be different in LH
_storedOffsetOfCompressedData = null;
_crc32 = cd.Crc32;
_compressedBytes = null;
_storedUncompressedData = null;
_currentlyOpenForWrite = false;
_everOpenedForWrite = false;
_outstandingWriteStream = null;
FullName = DecodeEntryName(cd.Filename);
_lhUnknownExtraFields = null;
// the cd should have these as null if we aren't in Update mode
_cdUnknownExtraFields = cd.ExtraFields;
_fileComment = cd.FileComment;
_compressionLevel = null;
}
private void ReadCentralDirectory()
{
ZipCentralDirectoryFileHeader zipCentralDirectoryFileHeader;
try
{
this._archiveStream.Seek(this._centralDirectoryStart, SeekOrigin.Begin);
long num = (long)0;
bool mode = this.Mode == ZipArchiveMode.Update;
while (ZipCentralDirectoryFileHeader.TryReadBlock(this._archiveReader, mode, out zipCentralDirectoryFileHeader))
{
this.AddEntry(new ZipArchiveEntry(this, zipCentralDirectoryFileHeader));
num += (long)1;
}
if (num != this._expectedNumberOfEntries)
{
throw new InvalidDataException(Messages.NumEntriesWrong);
}
}
catch (EndOfStreamException endOfStreamException)
{
throw new InvalidDataException(Messages.CentralDirectoryInvalid, endOfStreamException);
}
}
// if saveExtraFieldsAndComments is false, FileComment and ExtraFields will be null
// in either case, the zip64 extra field info will be incorporated into other fields
public static bool TryReadBlock(BinaryReader reader, bool saveExtraFieldsAndComments, out ZipCentralDirectoryFileHeader header)
{
header = new ZipCentralDirectoryFileHeader();
if (reader.ReadUInt32() != SignatureConstant)
{
return(false);
}
header.VersionMadeBySpecification = reader.ReadByte();
header.VersionMadeByCompatibility = reader.ReadByte();
header.VersionNeededToExtract = reader.ReadUInt16();
header.GeneralPurposeBitFlag = reader.ReadUInt16();
header.CompressionMethod = reader.ReadUInt16();
header.LastModified = reader.ReadUInt32();
header.Crc32 = reader.ReadUInt32();
uint compressedSizeSmall = reader.ReadUInt32();
uint uncompressedSizeSmall = reader.ReadUInt32();
header.FilenameLength = reader.ReadUInt16();
header.ExtraFieldLength = reader.ReadUInt16();
header.FileCommentLength = reader.ReadUInt16();
ushort diskNumberStartSmall = reader.ReadUInt16();
header.InternalFileAttributes = reader.ReadUInt16();
header.ExternalFileAttributes = reader.ReadUInt32();
uint relativeOffsetOfLocalHeaderSmall = reader.ReadUInt32();
header.Filename = reader.ReadBytes(header.FilenameLength);
bool uncompressedSizeInZip64 = uncompressedSizeSmall == ZipHelper.Mask32Bit;
bool compressedSizeInZip64 = compressedSizeSmall == ZipHelper.Mask32Bit;
bool relativeOffsetInZip64 = relativeOffsetOfLocalHeaderSmall == ZipHelper.Mask32Bit;
bool diskNumberStartInZip64 = diskNumberStartSmall == ZipHelper.Mask16Bit;
Zip64ExtraField zip64;
long endExtraFields = reader.BaseStream.Position + header.ExtraFieldLength;
using (Stream str = new SubReadStream(reader.BaseStream, reader.BaseStream.Position, header.ExtraFieldLength))
{
if (saveExtraFieldsAndComments)
{
header.ExtraFields = ZipGenericExtraField.ParseExtraField(str);
zip64 = Zip64ExtraField.GetAndRemoveZip64Block(header.ExtraFields,
uncompressedSizeInZip64, compressedSizeInZip64,
relativeOffsetInZip64, diskNumberStartInZip64);
}
else
{
header.ExtraFields = null;
zip64 = Zip64ExtraField.GetJustZip64Block(str,
uncompressedSizeInZip64, compressedSizeInZip64,
relativeOffsetInZip64, diskNumberStartInZip64);
}
}
// There are zip files that have malformed ExtraField blocks in which GetJustZip64Block() silently bails out without reading all the way to the end
// of the ExtraField block. Thus we must force the stream's position to the proper place.
reader.BaseStream.AdvanceToPosition(endExtraFields);
if (saveExtraFieldsAndComments)
{
header.FileComment = reader.ReadBytes(header.FileCommentLength);
}
else
{
reader.BaseStream.Position += header.FileCommentLength;
header.FileComment = null;
}
header.UncompressedSize = zip64.UncompressedSize == null
? uncompressedSizeSmall
: zip64.UncompressedSize.Value;
header.CompressedSize = zip64.CompressedSize == null
? compressedSizeSmall
: zip64.CompressedSize.Value;
header.RelativeOffsetOfLocalHeader = zip64.LocalHeaderOffset == null
? relativeOffsetOfLocalHeaderSmall
: zip64.LocalHeaderOffset.Value;
header.DiskNumberStart = zip64.StartDiskNumber == null
? diskNumberStartSmall
: zip64.StartDiskNumber.Value;
return(true);
}
internal ZipArchiveEntry(ZipArchive archive, ZipCentralDirectoryFileHeader cd, CompressionLevel compressionLevel) : this(archive, cd)
{
this._compressionLevel = new CompressionLevel?(compressionLevel);
}
//Initializes, attaches it to archive
internal ZipArchiveEntry(ZipArchive archive, ZipCentralDirectoryFileHeader cd, CompressionLevel compressionLevel)
: this(archive, cd)
{
_compressionLevel = compressionLevel;
}
public static bool TryReadBlock(BinaryReader reader, bool saveExtraFieldsAndComments, out ZipCentralDirectoryFileHeader header)
{
Zip64ExtraField justZip64Block;
long? uncompressedSize;
long value;
long num;
long value1;
header = new ZipCentralDirectoryFileHeader();
if (reader.ReadUInt32() != 33639248)
{
return(false);
}
header.VersionMadeBy = reader.ReadUInt16();
header.VersionNeededToExtract = reader.ReadUInt16();
header.GeneralPurposeBitFlag = reader.ReadUInt16();
header.CompressionMethod = reader.ReadUInt16();
header.LastModified = reader.ReadUInt32();
header.Crc32 = reader.ReadUInt32();
uint num1 = reader.ReadUInt32();
uint num2 = reader.ReadUInt32();
header.FilenameLength = reader.ReadUInt16();
header.ExtraFieldLength = reader.ReadUInt16();
header.FileCommentLength = reader.ReadUInt16();
ushort num3 = reader.ReadUInt16();
header.InternalFileAttributes = reader.ReadUInt16();
header.ExternalFileAttributes = reader.ReadUInt32();
uint num4 = reader.ReadUInt32();
header.Filename = reader.ReadBytes((int)header.FilenameLength);
bool flag = num2 == -1;
bool flag1 = num1 == -1;
bool flag2 = num4 == -1;
bool flag3 = num3 == 65535;
long position = (long)(reader.BaseStream.Position + (ulong)header.ExtraFieldLength);
using (Stream subReadStream = new SubReadStream(reader.BaseStream, reader.BaseStream.Position, (long)header.ExtraFieldLength))
{
if (!saveExtraFieldsAndComments)
{
header.ExtraFields = null;
justZip64Block = Zip64ExtraField.GetJustZip64Block(subReadStream, flag, flag1, flag2, flag3);
}
else
{
header.ExtraFields = ZipGenericExtraField.ParseExtraField(subReadStream);
justZip64Block = Zip64ExtraField.GetAndRemoveZip64Block(header.ExtraFields, flag, flag1, flag2, flag3);
}
}
reader.BaseStream.AdvanceToPosition(position);
if (!saveExtraFieldsAndComments)
{
Stream baseStream = reader.BaseStream;
baseStream.Position = (long)(baseStream.Position + (ulong)header.FileCommentLength);
header.FileComment = null;
}
else
{
header.FileComment = reader.ReadBytes((int)header.FileCommentLength);
}
if (!justZip64Block.UncompressedSize.HasValue)
{
value = (long)((ulong)num2);
}
else
{
uncompressedSize = justZip64Block.UncompressedSize;
value = uncompressedSize.Value;
}
header.UncompressedSize = value;
if (!justZip64Block.CompressedSize.HasValue)
{
num = (long)((ulong)num1);
}
else
{
uncompressedSize = justZip64Block.CompressedSize;
num = uncompressedSize.Value;
}
header.CompressedSize = num;
if (!justZip64Block.LocalHeaderOffset.HasValue)
{
value1 = (long)((ulong)num4);
}
else
{
uncompressedSize = justZip64Block.LocalHeaderOffset;
value1 = uncompressedSize.Value;
}
header.RelativeOffsetOfLocalHeader = value1;
header.DiskNumberStart = (!justZip64Block.StartDiskNumber.HasValue ? (int)num3 : justZip64Block.StartDiskNumber.Value);
return(true);
}
//if saveExtraFieldsAndComments is false, FileComment and ExtraFields will be null
//in either case, the zip64 extra field info will be incorporated into other fields
static public bool TryReadBlock(BinaryReader reader, bool saveExtraFieldsAndComments, out ZipCentralDirectoryFileHeader header)
{
header = new ZipCentralDirectoryFileHeader();
if (reader.ReadUInt32() != SignatureConstant)
return false;
header.VersionMadeBySpecification = reader.ReadByte();
header.VersionMadeByCompatibility = reader.ReadByte();
header.VersionNeededToExtract = reader.ReadUInt16();
header.GeneralPurposeBitFlag = reader.ReadUInt16();
header.CompressionMethod = reader.ReadUInt16();
header.LastModified = reader.ReadUInt32();
header.Crc32 = reader.ReadUInt32();
uint compressedSizeSmall = reader.ReadUInt32();
uint uncompressedSizeSmall = reader.ReadUInt32();
header.FilenameLength = reader.ReadUInt16();
header.ExtraFieldLength = reader.ReadUInt16();
header.FileCommentLength = reader.ReadUInt16();
ushort diskNumberStartSmall = reader.ReadUInt16();
header.InternalFileAttributes = reader.ReadUInt16();
header.ExternalFileAttributes = reader.ReadUInt32();
uint relativeOffsetOfLocalHeaderSmall = reader.ReadUInt32();
header.Filename = reader.ReadBytes(header.FilenameLength);
bool uncompressedSizeInZip64 = uncompressedSizeSmall == ZipHelper.Mask32Bit;
bool compressedSizeInZip64 = compressedSizeSmall == ZipHelper.Mask32Bit;
bool relativeOffsetInZip64 = relativeOffsetOfLocalHeaderSmall == ZipHelper.Mask32Bit;
bool diskNumberStartInZip64 = diskNumberStartSmall == ZipHelper.Mask16Bit;
Zip64ExtraField zip64;
long endExtraFields = reader.BaseStream.Position + header.ExtraFieldLength;
using (Stream str = new SubReadStream(reader.BaseStream, reader.BaseStream.Position, header.ExtraFieldLength))
{
if (saveExtraFieldsAndComments)
{
header.ExtraFields = ZipGenericExtraField.ParseExtraField(str);
zip64 = Zip64ExtraField.GetAndRemoveZip64Block(header.ExtraFields,
uncompressedSizeInZip64, compressedSizeInZip64,
relativeOffsetInZip64, diskNumberStartInZip64);
}
else
{
header.ExtraFields = null;
zip64 = Zip64ExtraField.GetJustZip64Block(str,
uncompressedSizeInZip64, compressedSizeInZip64,
relativeOffsetInZip64, diskNumberStartInZip64);
}
}
// There are zip files that have malformed ExtraField blocks in which GetJustZip64Block() silently bails out without reading all the way to the end
// of the ExtraField block. Thus we must force the stream's position to the proper place.
reader.BaseStream.AdvanceToPosition(endExtraFields);
if (saveExtraFieldsAndComments)
header.FileComment = reader.ReadBytes(header.FileCommentLength);
else
{
reader.BaseStream.Position += header.FileCommentLength;
header.FileComment = null;
}
header.UncompressedSize = zip64.UncompressedSize == null
? uncompressedSizeSmall
: zip64.UncompressedSize.Value;
header.CompressedSize = zip64.CompressedSize == null
? compressedSizeSmall
: zip64.CompressedSize.Value;
header.RelativeOffsetOfLocalHeader = zip64.LocalHeaderOffset == null
? relativeOffsetOfLocalHeaderSmall
: zip64.LocalHeaderOffset.Value;
header.DiskNumberStart = zip64.StartDiskNumber == null
? diskNumberStartSmall
: zip64.StartDiskNumber.Value;
return true;
}
//if saveExtraFieldsAndComments is false, FileComment and ExtraFields will be null
//in either case, the zip64 extra field info will be incorporated into other fields
static public Boolean TryReadBlock(BinaryReader reader, Boolean saveExtraFieldsAndComments, out ZipCentralDirectoryFileHeader header)
{
header = new ZipCentralDirectoryFileHeader();
if (reader.ReadUInt32() != SignatureConstant)
{
return(false);
}
header.VersionMadeBy = reader.ReadUInt16();
header.VersionNeededToExtract = reader.ReadUInt16();
header.GeneralPurposeBitFlag = reader.ReadUInt16();
header.CompressionMethod = reader.ReadUInt16();
header.LastModified = reader.ReadUInt32();
header.Crc32 = reader.ReadUInt32();
UInt32 compressedSizeSmall = reader.ReadUInt32();
UInt32 uncompressedSizeSmall = reader.ReadUInt32();
header.FilenameLength = reader.ReadUInt16();
header.ExtraFieldLength = reader.ReadUInt16();
header.FileCommentLength = reader.ReadUInt16();
UInt16 diskNumberStartSmall = reader.ReadUInt16();
header.InternalFileAttributes = reader.ReadUInt16();
header.ExternalFileAttributes = reader.ReadUInt32();
UInt32 relativeOffsetOfLocalHeaderSmall = reader.ReadUInt32();
header.Filename = reader.ReadBytes(header.FilenameLength);
Boolean uncompressedSizeInZip64 = uncompressedSizeSmall == ZipHelper.Mask32Bit;
Boolean compressedSizeInZip64 = compressedSizeSmall == ZipHelper.Mask32Bit;
Boolean relativeOffsetInZip64 = relativeOffsetOfLocalHeaderSmall == ZipHelper.Mask32Bit;
Boolean diskNumberStartInZip64 = diskNumberStartSmall == ZipHelper.Mask16Bit;
Zip64ExtraField zip64;
using (Stream str = new SubReadStream(reader.BaseStream, reader.BaseStream.Position, header.ExtraFieldLength))
{
if (saveExtraFieldsAndComments)
{
header.ExtraFields = ZipGenericExtraField.ParseExtraField(str);
zip64 = Zip64ExtraField.GetAndRemoveZip64Block(header.ExtraFields,
uncompressedSizeInZip64, compressedSizeInZip64,
relativeOffsetInZip64, diskNumberStartInZip64);
}
else
{
header.ExtraFields = null;
zip64 = Zip64ExtraField.GetJustZip64Block(str,
uncompressedSizeInZip64, compressedSizeInZip64,
relativeOffsetInZip64, diskNumberStartInZip64);
}
}
if (saveExtraFieldsAndComments)
{
header.FileComment = reader.ReadBytes(header.FileCommentLength);
}
else
{
reader.BaseStream.Position += header.FileCommentLength;
header.FileComment = null;
}
header.UncompressedSize = zip64.UncompressedSize == null
? uncompressedSizeSmall
: zip64.UncompressedSize.Value;
header.CompressedSize = zip64.CompressedSize == null
? compressedSizeSmall
: zip64.CompressedSize.Value;
header.RelativeOffsetOfLocalHeader = zip64.LocalHeaderOffset == null
? relativeOffsetOfLocalHeaderSmall
: zip64.LocalHeaderOffset.Value;
header.DiskNumberStart = zip64.StartDiskNumber == null
? diskNumberStartSmall
: zip64.StartDiskNumber.Value;
return(true);
}
