private byte[] DecryptDatabaseFile(byte[] fileData)
{
using var reader = new BinaryReader(new MemoryStream(fileData));
var dataEncryptionFlagRawData = reader.ReadBytes(1);
var dataEncryptionFlag = BitConverter.ToBoolean(dataEncryptionFlagRawData, 0);
if (dataEncryptionFlag)
{
var key = reader.ReadBytes(EncryptionKeyLength);
var cipherData = reader.ReadBytes(fileData.Length - dataEncryptionFlagRawData.Length - EncryptionKeyLength);
return(CryptoUtility.AesDecrypt(cipherData, key));
}
else
{
return(reader.ReadBytes(fileData.Length - dataEncryptionFlagRawData.Length));
}
}
