| public static IsValidCacheState ( ECacheState cachestate ) : bool | ||
| cachestate | ECacheState | |
| return | bool | |
private void ReadBlobHeader()
{
cacheState = (ECacheState)source.ReadByte();
processCode = (EAutoPreprocessCode)source.ReadByte();
bytesAvailable = source.ReadInt32();
spareAvailable = source.ReadInt32();
if (!BlobUtil.IsValidCacheState(cacheState) || !BlobUtil.IsValidProcess(processCode))
{
throw new InvalidBlobException("Invalid blob header");
}
TakeBytes(BlobHeaderLength);
UnpackBlobIfNeeded();
}
private bool TryReadBlob(UInt32 lengthHint)
{
if (!CanRead(BlobHeaderLength) || lengthHint < BlobHeaderLength)
{
return(false);
}
ECacheState cachestate;
EAutoPreprocessCode process;
Int32 serialized, spare;
Mark(BlobHeaderLength);
try
{
cachestate = (ECacheState)input.ReadByte();
process = (EAutoPreprocessCode)input.ReadByte();
serialized = input.ReadInt32();
spare = input.ReadInt32();
}
catch (Exception)
{
Reset();
throw new InvalidDataException("Corrupted blob");
}
if (!BlobUtil.IsValidCacheState(cachestate) || !BlobUtil.IsValidProcess(process) ||
serialized < 0 || spare < 0 ||
!CanReadMarked(serialized))
{
Reset();
return(false);
}
serialized -= BlobHeaderLength;
if (process != EAutoPreprocessCode.eAutoPreprocessCodePlaintext)
{
PeekableStream originalStream = input;
object extendedData = null;
input = HandleProcessCode(process, ref serialized, out extendedData);
bool result = TryReadBlob((uint)serialized);
input.ReadBytes(40); // read and dispose HMACs
// todo: validate them?
input.Close();
input = originalStream;
return(result);
}
if (Blob != null)
{
Blob(process, cachestate);
}
ProcessFields(serialized);
if (spare > 0)
{
byte[] spareData = new byte[spare];
input.Read(spareData, 0, spare);
if (Spare != null)
{
Spare(spareData);
}
}
if (EndBlob != null)
{
EndBlob();
}
return(true);
}
