private void SetKey(byte[] pbPasswordUtf8)
{
Debug.Assert(pbPasswordUtf8 != null);
if(pbPasswordUtf8 == null) throw new ArgumentNullException("pbPasswordUtf8");
#if (DEBUG && !KeePassLibSD)
Debug.Assert(ValidatePassword(pbPasswordUtf8));
#endif
SHA256Managed sha256 = new SHA256Managed();
byte[] pbRaw = sha256.ComputeHash(pbPasswordUtf8);
m_psPassword = new ProtectedString(true, pbPasswordUtf8);
m_pbKeyData = new ProtectedBinary(true, pbRaw);
}