Commit 86352430 authored by bol-van's avatar bol-van
Browse files

nfqws: fix slen=0 case

parent e5f20d05

nfq/nfqws.c

+13 −3
Original line number Diff line number Diff line
@@ -1025,9 +1025,19 @@ static void onetime_tls_mod(struct desync_profile *dp) 
	}

	if (dp->fake_tls_mod & FAKE_TLS_MOD_RND_SNI)

	{

		if (!TLSFindExt(dp->fake_tls,dp->fake_tls_size,0,&ext,&extlen,false) || !TLSAdvanceToHostInSNI(&ext,&extlen,&slen))

		if (!TLSFindExt(dp->fake_tls,dp->fake_tls_size,0,&ext,&extlen,false))

		{

			DLOG_ERR("profile %d rndsni set but tls fake structure invalid or does not have SNI\n", dp->n);

			DLOG_ERR("profile %d rndsni set but tls fake does not have SNI\n", dp->n);

			exit_clean(1);

		}

		if (!TLSAdvanceToHostInSNI(&ext,&extlen,&slen))

		{

			DLOG_ERR("profile %d rndsni set but tls fake has invalid SNI structure\n", dp->n);

			exit_clean(1);

		}

		if (!slen)

		{

			DLOG_ERR("profile %d rndsni set but tls fake has zero sized SNI\n", dp->n);

			exit_clean(1);

		}

		uint8_t *sni = dp->fake_tls + (ext - dp->fake_tls);
@@ -1048,7 +1058,7 @@ static void onetime_tls_mod(struct desync_profile *dp) 
			sni[slen-4] = '.';

			memcpy(sni+slen-3,tld[random()%(sizeof(tld)/sizeof(*tld))],3);

		}

		else if (slen>=1)

		else

			fill_random_az09(sni+1,slen-1);



		if (params.debug)