remove "realm" from hmackey for Long Term credentials

[quadriq]

Hi,

I would like to remove the "realm" value from hmackey for LT-creadentials. Because I would like to have long-term creadentials in a database which are valid for different realms.

here the coed of ns_turn_msg.c, which generates str, which is then used to generate the hmackey

  strncpy((char *)str, (const char *)uname, sz);
  str[ulen] = ':';
  strncpy((char *)str + ulen + 1, (const char *)realm, sz - ulen - 1);
  str[ulen + 1 + rlen] = ':';
  strncpy((char *)str + ulen + 1 + rlen + 1, (const char *)upwd, sz - ulen - 1 - rlen - 1);
  str[strl] = 0;

I can remove the "realm" part from here.. this works. But then I would fail by stun_check_message_integrity_by_key_str method. So ath the end the connection is 401.

however I am not able to understand, how this integrity check involves the realm part.. Can someone give me a hint how to rewrite the integrity check if I would remove "realm" from the key-generation?

Thanks