private void TypeStartBlob(EAutoPreprocessCode processCode, ECacheState cacheState)
{
if (expectingIndex >= 0)
{
throw new Exception("Could not parse type, expecting FieldValue but got Blob");
}
depth++;
}
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();
}
public static bool IsValidProcess(EAutoPreprocessCode process)
{
return (process == EAutoPreprocessCode.eAutoPreprocessCodePlaintext ||
process == EAutoPreprocessCode.eAutoPreprocessCodeCompressed ||
process == EAutoPreprocessCode.eAutoPreprocessCodeEncrypted);
}
private void XmlStartBlob(EAutoPreprocessCode processCode, ECacheState cacheState)
{
xmlOut.WriteStartElement("blob");
}
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 PeekableStream HandleProcessCode(EAutoPreprocessCode process, ref int serialized, out object extended)
{
try
{
switch (process)
{
case EAutoPreprocessCode.eAutoPreprocessCodeCompressed:
{
Mark(CompressedHeaderLength);
Int32 decompressedSize, unknown;
Int16 level;
decompressedSize = input.ReadInt32();
unknown = input.ReadInt32();
level = input.ReadInt16();
input.ReadInt16(); // skip zlib header
serialized -= CompressedHeaderLength + 2 /* for zlib header */;
extended = level;
DeflateStream deflate = new DeflateStream(new FramingStream(input, serialized), CompressionMode.Decompress, true);
return new PeekableStream(new BufferedStream(deflate, 0x1000));
}
case EAutoPreprocessCode.eAutoPreprocessCodeEncrypted:
{
Mark( EncryptedHeaderLength );
int decryptedSize;
byte[] aesIv;
decryptedSize = input.ReadInt32();
aesIv = input.ReadBytes( 16 );
serialized -= EncryptedHeaderLength;
// account for one hmac
// (but there's actually two!)
// how does this work? blatently lucky code!!
serialized -= 20;
extended = aesIv;
RijndaelManaged aes = new RijndaelManaged();
aes.BlockSize = aes.KeySize = 128;
aes.Mode = CipherMode.CBC;
ICryptoTransform aesTransform = aes.CreateDecryptor( aesKey, aesIv );
CryptoStream decryptStream = new CryptoStream( new FramingStream( input, serialized ), aesTransform, CryptoStreamMode.Read );
return new PeekableStream( new BufferedStream( decryptStream, 0x1000 ) );
}
}
}
catch (Exception ex)
{
Console.WriteLine("Exception processing code: " + ex);
Reset();
throw new Exception("Corrupted blob while handling process code");
}
throw new Exception("Process code went unhandled");
}
private PeekableStream HandleProcessCode(EAutoPreprocessCode process, ref int serialized, out object extended)
{
try
{
switch (process)
{
case EAutoPreprocessCode.eAutoPreprocessCodeCompressed:
{
Mark(CompressedHeaderLength);
Int32 decompressedSize, unknown;
Int16 level;
decompressedSize = input.ReadInt32();
unknown = input.ReadInt32();
level = input.ReadInt16();
input.ReadInt16(); // skip zlib header
serialized -= CompressedHeaderLength + 2 /* for zlib header */;
extended = level;
DeflateStream deflate = new DeflateStream(new FramingStream(input, serialized), CompressionMode.Decompress, true);
return(new PeekableStream(new BufferedStream(deflate, 0x1000)));
}
case EAutoPreprocessCode.eAutoPreprocessCodeEncrypted:
{
Mark(EncryptedHeaderLength);
int decryptedSize;
byte[] aesIv;
decryptedSize = input.ReadInt32();
aesIv = input.ReadBytes(16);
serialized -= EncryptedHeaderLength;
// account for one hmac
// (but there's actually two!)
// how does this work? blatently lucky code!!
serialized -= 20;
extended = aesIv;
RijndaelManaged aes = new RijndaelManaged();
aes.BlockSize = aes.KeySize = 128;
aes.Mode = CipherMode.CBC;
ICryptoTransform aesTransform = aes.CreateDecryptor(aesKey, aesIv);
CryptoStream decryptStream = new CryptoStream(new FramingStream(input, serialized), aesTransform, CryptoStreamMode.Read);
return(new PeekableStream(new BufferedStream(decryptStream, 0x1000)));
}
}
}
catch (Exception ex)
{
Console.WriteLine("Exception processing code: " + ex);
Reset();
throw new Exception("Corrupted blob while handling process code");
}
throw new Exception("Process code went unhandled");
}
public static bool IsValidProcess(EAutoPreprocessCode process)
{
return(process == EAutoPreprocessCode.eAutoPreprocessCodePlaintext ||
process == EAutoPreprocessCode.eAutoPreprocessCodeCompressed ||
process == EAutoPreprocessCode.eAutoPreprocessCodeEncrypted);
}
private void XmlStartBlob(EAutoPreprocessCode processCode, ECacheState cacheState)
{
xmlOut.WriteStartElement("blob");
}
