private byte[] GetResourceBytes(byte[] buffer)
{
byte flags = 0;
int encryptKey = _random.Next(100, int.MaxValue);
// Compress
if (buffer.Length > 30)
{
buffer = CompressionUtils.GZipCompress(buffer);
flags |= 1;
}
// Encrypt
StrongCryptoUtils.Encrypt(buffer, encryptKey);
int pos = 0;
var blob = new Blob(buffer.Length + 14);
blob.Write(ref pos, (int)ResourceSignature); // Signature
blob.Write(ref pos, (int)StrongCryptoUtils.ComputeHash(buffer)); // Hash
blob.Write(ref pos, (int)encryptKey); // Encrypt Key
blob.Write(ref pos, (byte)flags); // Encrypt Key
blob.Write(ref pos, (byte)0); // Unused
blob.Write(ref pos, (byte[])buffer); // Data
return(blob.ToArray());
}
public int Add(byte[] buffer, int offset, int count, bool encrypt = false, bool compress = false)
{
int blobId = NextBlobID;
byte flags = 0;
// Compress
if (compress && count > 30)
{
buffer = CompressionUtils.GZipCompress(buffer, offset, count);
offset = 0;
count = buffer.Length;
flags |= 2;
_hasCompress = true;
}
// Encrypt
if (encrypt)
{
StrongCryptoUtils.Encrypt(buffer, _encryptKey, offset, count);
flags |= 1;
_hasEncrypt = true;
}
// Write
int pos = _blob.Length;
_blob.Write(ref pos, (byte)flags);
_blob.Write7BitEncodedInt(ref pos, count);
_blob.Write(ref pos, buffer, offset, count);
return(blobId);
}
