The implementation of md5_hash(...) and md5_hmac(...) in bro.bif is
identical:
%{
unsigned char digest[16];
hmac_md5_val(@ARG@, digest);
return new StringVal(md5_digest_print(digest));
%}
It seems that md5_hmac should support providing the secret key. Does
anyone know more details about this?
Matthias