internal static ZipIOCentralDirectoryDigitalSignature ParseRecord(BinaryReader reader)
{
// this record is optional, so let's check for presence of signature rightaway
//let's ensure we have at least enough data to cover _fixedMinimalRecordSize bytes of signature
if ((reader.BaseStream.Length - reader.BaseStream.Position) < _fixedMinimalRecordSize)
{
return(null);
}
UInt32 signatureValue = reader.ReadUInt32();
if (signatureValue != _signatureConstant)
{
return(null);
}
//at this point we can assume that Digital Signature Record is there
// Convention is to throw
throw new NotSupportedException(SR.Get(SRID.ZipNotSupportedSignedArchive));
// disable creation/parsing of zip archive digital signatures
#if ArchiveSignaturesEnabled
ZipIOCentralDirectoryDigitalSignature record = new ZipIOCentralDirectoryDigitalSignature();
record._signature = signatureValue;
record._sizeOfData = reader.ReadUInt16();
record._signatureData = reader.ReadBytes(record._sizeOfData);
record.Validate();
return(record);
#endif
}
internal static ZipIOCentralDirectoryDigitalSignature ParseRecord(BinaryReader reader)
{
// this record is optional, so let's check for presence of signature rightaway
//let's ensure we have at least enough data to cover _fixedMinimalRecordSize bytes of signature
if ((reader.BaseStream.Length - reader.BaseStream.Position) < _fixedMinimalRecordSize)
{
return null;
}
UInt32 signatureValue = reader.ReadUInt32();
if (signatureValue != _signatureConstant)
{
return null;
}
//at this point we can assume that Digital Signature Record is there
// Convention is to throw
throw new NotSupportedException(SR.Get(SRID.ZipNotSupportedSignedArchive));
// Zeus PS 3: disable creation/parsing of zip archive digital signatures
#if ArchiveSignaturesEnabled
ZipIOCentralDirectoryDigitalSignature record = new ZipIOCentralDirectoryDigitalSignature ();
record._signature = signatureValue;
record._sizeOfData = reader.ReadUInt16();
record._signatureData = reader.ReadBytes(record._sizeOfData );
record.Validate();
return record;
#endif
}
private void ParseRecord(BinaryReader reader,
long centralDirectoryOffset,
int centralDirectoryCount,
long expectedCentralDirectorySize)
{
if (centralDirectoryCount > 0)
{
// collect all headers into a local array list for sorting
SortedList headerList = new SortedList(centralDirectoryCount);
ZipIOCentralDirectoryFileHeader header;
for (int i = 0; i < centralDirectoryCount; i++)
{
header = ZipIOCentralDirectoryFileHeader.ParseRecord(reader, _blockManager.Encoding);
headerList.Add(header.OffsetOfLocalHeader, header);
}
if (reader.BaseStream.Position - centralDirectoryOffset > expectedCentralDirectorySize)
{ // it looks like a corrupted file, as we have parsed more than central directory supposed to contain
throw new FileFormatException(SR.Get(SRID.CorruptedData));
}
// then add to the ordered dictionary in sorted order
foreach (ZipIOCentralDirectoryFileHeader fileHeader in headerList.Values)
{
// at this point fileHeader.FileName is normalized using
// the ZipIOBlockManager.ValidateNormalizeFileName
CentralDirectoryDictionary.Add(fileHeader.FileName, fileHeader);
}
//load central directory [digital signature] - this has nothing to
// do with OPC digital signing
// this record is optional, and the function might return null
_centralDirectoryDigitalSignature = ZipIOCentralDirectoryDigitalSignature.ParseRecord(reader);
}
_offset = centralDirectoryOffset;
_dirtyFlag = false;
Validate(expectedCentralDirectorySize);
}
internal static ZipIOCentralDirectoryDigitalSignature CreateNew()
{
ZipIOCentralDirectoryDigitalSignature record = new ZipIOCentralDirectoryDigitalSignature();
return(record);
}
internal static ZipIOCentralDirectoryDigitalSignature CreateNew()
{
ZipIOCentralDirectoryDigitalSignature record = new ZipIOCentralDirectoryDigitalSignature ();
return record;
}
