public static bool Save(string storagePassword)
{
Debug.Log($"[mStorage] Save file ({DbPath})");
var directory = Path.GetDirectoryName(DbPath);
if (!Directory.Exists(directory))
{
try
{
// ReSharper disable once AssignNullToNotNullAttribute
Directory.CreateDirectory(directory);
}
catch (Exception e)
{
Debug.LogWarning($"[mStorage] Create directory ({DbPath}) error ({e})");
return(false);
}
}
Stream stream;
try
{
stream = File.Open(DbPath, FileMode.OpenOrCreate, FileAccess.ReadWrite);
stream.SetLength(0);
}
catch (Exception e)
{
Debug.LogWarning($"[mStorage] Save file ({DbPath}) error ({e})");
return(false);
}
stream.WriteStruct(new DataFileVersionHeader
{
MagicArray = new[] { 'M', 'B', 'I', 'N' },
Version = Version
});
stream.Seek(Marshal.SizeOf <DataFileHeader>(), SeekOrigin.Current);
// encryption data
var symmetricKey = new RijndaelManaged
{
Mode = CipherMode.CBC,
Padding = PaddingMode.Zeros
};
var storageKeyBytes = new Rfc2898DeriveBytes(storagePassword,
Encoding.UTF8.GetBytes(SaltKey)).GetBytes(KeyLength / 8);
var encryptor = symmetricKey.CreateEncryptor(storageKeyBytes,
Encoding.UTF8.GetBytes(VIKey));
var dataStart = stream.Position;
var cryptoStream = new CryptoStream(stream, encryptor, CryptoStreamMode.Write);
foreach (var pair in _data)
{
var keyBytes = Encoding.UTF8.GetBytes(pair.Key);
cryptoStream.WriteStruct(new DataFileItem()
{
KeySize = (byte)keyBytes.Length,
DataSize = pair.Value.Length,
});
cryptoStream.Write(keyBytes, 0, keyBytes.Length);
cryptoStream.Write(pair.Value, 0, pair.Value.Length);
}
cryptoStream.FlushFinalBlock();
var encryptedSize = stream.Position - dataStart;
stream.Seek(Marshal.SizeOf <DataFileVersionHeader>(), SeekOrigin.Begin);
stream.WriteStruct(new DataFileHeader
{
ItemsNum = _data.Count,
EncryptedSize = encryptedSize,
});
cryptoStream.Close();
stream.Close();
return(true);
}
