private bool IsValidFile(Stream stream, ref byte[] contentBytes)
{
bool valid = false;
string md5Hash = null;
int headerLength = 0;
int contentLength = 0;
bool validHeader = SaveUtilities.DeserializeHeader(stream, ref headerLength, ref m_modifiedTime, ref m_deviceName, ref md5Hash, ref contentLength);
if (validHeader)
{
contentBytes = new byte[contentLength];
int contentRead = stream.Read(contentBytes, 0, contentLength);
if (contentRead == contentLength)
{
string contentHash = SaveUtilities.CalculateMD5Hash(contentBytes);
if (md5Hash == contentHash)
{
valid = true;
}
else
{
Debug.LogError(string.Format("SaveData :: MD5 Checksum Failed (Got {0} expected {1})", md5Hash, contentHash));
}
}
else
{
Debug.LogError(string.Format("SaveData :: Content length different to expected (Got {0} expected {1})", contentRead, contentLength));
}
}
else
{
Debug.LogError("SaveData :: Invalid header detected!");
}
return(valid);
}
public MemoryStream SaveToStream()
{
MemoryStream stream = null;
string json = m_saveData.ToJSON();
//Compress the data using LZF compression
byte[] compressed = null;
using (MemoryStream compMemStream = new MemoryStream())
{
using (StreamWriter writer = new StreamWriter(compMemStream, Encoding.UTF8))
{
writer.Write(json);
writer.Close();
compressed = CLZF2.Compress(compMemStream.ToArray());
}
}
if (compressed != null)
{
byte[] encrypted = AESEncryptor.Encrypt(m_cryptoKey, m_cryptoIV, compressed);
if (encrypted != null)
{
stream = new MemoryStream();
//Write version and headers!
byte[] version = SaveUtilities.SerializeVersion(HeaderVersion);
stream.Write(version, 0, version.Length);
byte[] header = SaveUtilities.SerializeHeader(m_modifiedTime, m_deviceName, SaveUtilities.CalculateMD5Hash(encrypted), encrypted.Length);
stream.Write(header, 0, header.Length);
//Write encrypted and compressed data to stream
stream.Write(encrypted, 0, encrypted.Length);
}
}
return(stream);
}