private static byte[] UseKeyfile(byte[] passwordBytes, string keyfilePath)
{
try
{
byte[] keyfileBytes = Keyfiles.ReadKeyfile(keyfilePath);
return(passwordBytes == null ? keyfileBytes : CombineKeyfileAndPassword(passwordBytes, keyfileBytes));
}
catch (Exception ex) when(ExceptionFilters.FileAccess(ex))
{
DisplayMessage.Exception(ex.GetType().Name, "Unable to read keyfile. The keyfile has not been used.");
return(passwordBytes);
}
}
private static byte[] GetKeyfileBytes(byte[] passwordBytes, string keyfilePath)
{
if (!string.IsNullOrEmpty(keyfilePath))
{
byte[] keyfileBytes = Keyfiles.ReadKeyfile(keyfilePath);
if (keyfileBytes != null)
{
MemoryEncryption.DecryptByteArray(ref passwordBytes);
// Combine password and keyfile bytes
passwordBytes = HashingAlgorithms.Blake2(passwordBytes, keyfileBytes);
MemoryEncryption.EncryptByteArray(ref passwordBytes);
Utilities.ZeroArray(keyfileBytes);
}
}
return(passwordBytes);
}
private static byte[] KeyfileAsPassword(string keyfilePath)
{
// If only a keyfile was selected, use the keyfile bytes as the password
byte[] passwordBytes = Keyfiles.ReadKeyfile(keyfilePath);
return(HashPasswordBytes(passwordBytes));
}
