krb5_nfold
krb5_nfold(concatlen*8, concat, keybytes*8, foldstring);
krb5_nfold((keybytes * 2) * 8, combined, keybytes * 8, rnd);
krb5_nfold(in_constant->length*8, (unsigned char *) in_constant->data,
krb5_nfold(in_constant->length*8,
void krb5_nfold