Merge pull request #6730 from EricLuehrsen/unbound_20180808

unbound: log openssl-1.0.2 lacks TLS host verification
2018-08-10 15:54:36 +02:00 · 2018-08-10 15:54:36 +02:00 · 17ab7a24aa
commit 17ab7a24aa
parent ba5e9aa945 1cccacf359
8 changed files with 118 additions and 23 deletions
--- a/net/unbound/Makefile
+++ b/net/unbound/Makefile
@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk

 PKG_NAME:=unbound
 PKG_VERSION:=1.7.3
-PKG_RELEASE:=4
+PKG_RELEASE:=5

 PKG_LICENSE:=BSD-3-Clause
 PKG_LICENSE_FILES:=LICENSE
--- a/net/unbound/files/README.md
+++ b/net/unbound/files/README.md
@ -166,11 +166,9 @@ config zone
 ```

 ## HOW TO: TLS Over DNS
-Unbound has the ability to be client and server in TLS mode. UCI can configure Unbound to be a client forwarding queries in TLS mode for selected domains. (Server is more complex to setup and needs to be done manually). This may be desired for privacy against stealth market tracking in some cases. Some public DNS servers seem to advertise help in this quest.
+Unbound can use TLS as a client or server. UCI supports Unbound as a forwarding client with TLS. Servers are more complex and need manual configuration. This may be desired for privacy against stealth tracking. Some public DNS servers seem to advertise help in this quest. If your looking for a better understanding, then some information can be found at [Cloudflare](https://www.cloudflare.com/) DNS [1.1.1.1](https://1.1.1.1/). The following is a generic example. You can mix providers by using complete server specificaiton to override the zones common port and certificate domain index.

-Unbound will make TLS connections without validation unless you install the 'ca-bundle' package. Do **not**  however forget to maintain the certification bundle. The validation chain otherwise will expire and connections will go dead. Unbound makes and breaks TCP connections per connection. To reduce the lag from TLS handshaking it may help to use more cache memory `resource`, increase record exirations `ttl_min`, enable `aggressive` searching, or manually enable prefetch options.
-
-The following is a generic example. If your looking for a better understanding, then some information can be found at [Cloudflare](https://www.cloudflare.com/) DNS [1.1.1.1](https://1.1.1.1/) for one place.
+**NOTICE:** Unbound requires openssl-1.1.0 to verify host certificates. OpenWrt at present is configured with openssl-1.0.2. Connections will be over TLS, but theoretically, certificates may not be from a trusted source. See report [Unbound #658](https://www.nlnetlabs.nl/bugs-script/show_bug.cgi?id=658). When this is resolved, it will be recommended again to install `ca-bundle`, maintain it, and be sure to include the TLS certificate domain index with the host addresses.

 **/etc/config/unbound**:
 ```
@ -179,10 +177,14 @@ config zone
  # question: do you want to recurse when TLS fails or not?
  option fallback '0'
  option tls_index 'dns.example.net'
+  option tls_port '853'
  option tls_upstream '1'
  option zone_type 'forward_zone'
+  # these servers assume a common TLS port/index
  list server '192.0.2.53'
  list server '2001:db8::53'
+  # this alternate server is fully specified inline
+  list server '192.0.2.153@443#dns.alternate.example.org'
  list zone_name '.'
 ```

--- a/net/unbound/files/dnsmasq.sh
+++ b/net/unbound/files/dnsmasq.sh
@ -80,7 +80,7 @@ create_host_record() {


    case $ip in
-      fe80:*|169.254.*)
+      fe[89ab][0-9a-f]:*|169.254.*)
        debug_ip="$ip@$host"
        ;;

--- a/net/unbound/files/iptools.sh
+++ b/net/unbound/files/iptools.sh
@ -124,6 +124,20 @@ valid_subnet4() {

 ##############################################################################

+valid_subnet_any() {
+  local subnet=$1
+  local validip4=$( valid_subnet4 $subnet )
+  local validip6=$( valid_subnet6 $subnet )
+
+
+  if [ "$validip4" = "ok" -o "$validip6" = "ok" ] ; then
+    echo "ok"
+  else
+    echo "not"
+  fi
+}
+##############################################################################
+
 private_subnet() {
  case "$1" in
    10"."*) echo "ok" ;;
--- a/net/unbound/files/unbound.init
+++ b/net/unbound/files/unbound.init
@ -64,10 +64,9 @@ service_triggers() {
  if [ ! -f "$UB_TOTAL_CONF" -o -n "$UB_BOOT" ] ; then
    # Unbound is can be a bit heavy, so wait some on first start but any
    # interface coming up affects the trigger and delay so guarantee start
-    procd_add_raw_trigger "interface.*.up" 5000 /etc/init.d/unbound restart
+    procd_add_raw_trigger "interface.*.up" 3000 /etc/init.d/unbound restart

  elif [ -n "$triggers" ] ; then
-    PROCD_RELOAD_DELAY=2000
    procd_add_reload_trigger "unbound" "dhcp"


@ -77,7 +76,6 @@ service_triggers() {
    done

  else
-    PROCD_RELOAD_DELAY=2000
    procd_add_reload_trigger "unbound" "dhcp"
  fi
 }
--- a/net/unbound/files/unbound.sh
+++ b/net/unbound/files/unbound.sh
@ -85,9 +85,8 @@ UB_LIST_ZONE_NAMES=""

 bundle_all_networks() {
  local cfg="$1"
-  local ifname ifdashname
+  local ifname ifdashname validip
  local subnet subnets subnets4 subnets6
-  local validip4 validip6

  network_get_subnets  subnets4 "$cfg"
  network_get_subnets6 subnets6 "$cfg"
@ -99,11 +98,10 @@ bundle_all_networks() {

  if [ -n "$subnets" ] ; then
    for subnet in $subnets ; do
-      validip4=$( valid_subnet4 $subnet )
-      validip6=$( valid_subnet6 $subnet )
+      validip=$( valid_subnet_any $subnet )


-      if [ "$validip4" = "ok" -o "$validip6" = "ok" ] ; then
+      if [ "$validip" = "ok" ] ; then
        UB_LIST_NETW_ALL="$UB_LIST_NETW_ALL $ifdashname@$subnet"
      fi
    done
@ -375,8 +373,10 @@ unbound_control() {

 unbound_zone() {
  local cfg=$1
+  local servers_ip=""
+  local servers_host=""
  local zone_sym zone_name zone_type zone_enabled zone_file
-  local tls_upstream fallback proivder
+  local tls_upstream fallback
  local server port tls_port tls_index tls_suffix url_dir

  if [ ! -f "$UB_ZONE_CONF" ] ; then
@ -464,17 +464,50 @@ unbound_zone() {


      if [ -n "$UB_LIST_ZONE_NAMES" -a -n "$UB_LIST_ZONE_SERVERS" ] ; then
+        for server in $UB_LIST_ZONE_SERVERS ; do
+          if [ "$( valid_subnet_any $server )" = "not" ] ; then
+            case $server in
+              *@[0-9]*)
+                # unique Unbound option for server host name
+                servers_host="$servers_host $server"
+                ;;
+
+              *)
+                if [ "$tls_upstream" = "yes" ] ; then
+                  servers_host="$servers_host $server${tls_port:+@${tls_port}}"
+                else
+                  servers_host="$servers_host $server${port:+@${port}}"
+                fi
+            esac
+
+          else
+            case $server in
+              *[0-9]@[0-9]*)
+                # unique Unbound option for server address
+                servers_ip="$servers_ip $server"
+                ;;
+
+              *)
+                if [ "$tls_upstream" = "yes" ] ; then
+                  servers_ip="$servers_ip $server$tls_suffix"
+                else
+                  servers_ip="$servers_ip $server${port:+@${port}}"
+                fi
+            esac
+          fi
+        done
+
+
        for zonename in $UB_LIST_ZONE_NAMES ; do
          {
            # generate a forward-zone with or without tls
            echo "forward-zone:"
            echo "  name: $zonename"
-            for server in $UB_LIST_ZONE_SERVERS ; do
-              if [ "$tls_upstream" = "yes" ] ; then
-                echo "  forward-addr: $server${tls_suffix}"
-              else
-                echo "  forward-addr: $server${port:+@${port}}"
-              fi
+            for server in $servers_host ; do
+              echo "  forward-host: $server"
+            done
+            for server in $servers_ip ; do
+              echo "  forward-addr: $server"
            done
            echo "  forward-first: $fallback"
            echo "  forward-tls-upstream: $tls_upstream"
--- a/net/unbound/patches/100-example-conf-in.patch
+++ b/net/unbound/patches/100-example-conf-in.patch
@ -1,5 +1,5 @@
-diff --git a/doc/example.conf.in b/doc/example.conf.in
-index be83bda..7317b23 100644
+Index: doc/example.conf.in
+===================================================================
 --- a/doc/example.conf.in
 +++ b/doc/example.conf.in
@@ -15,6 +15,76 @@ server:
--- a/net/unbound/patches/200-openssl-log-err.patch
+++ b/net/unbound/patches/200-openssl-log-err.patch
@ -0,0 +1,48 @@
+Index: daemon/remote.c
+===================================================================
+--- a/daemon/remote.c
+++ b/daemon/remote.c
+@@ -1950,6 +1950,11 @@
+ 				return NULL;
+ 			}
+ 		} else {
+#ifndef HAVE_SSL_SET1_HOST
+			if(auth_name)
+			  log_err("no name verification functionality in "
+				"ssl library, ignored name for %s", todo);
+#endif
+ 			/* add address */
+ 			if(!delegpt_add_addr_mlc(dp, &addr, addrlen, 0, 0,
+ 				auth_name)) {
+Index: iterator/iter_fwd.c
+===================================================================
+--- a/iterator/iter_fwd.c
+++ b/iterator/iter_fwd.c
+@@ -239,6 +239,11 @@
+ 				s->name, p->str);
+ 			return 0;
+ 		}
+#ifndef HAVE_SSL_SET1_HOST
+		if(tls_auth_name)
+			log_err("no name verification functionality in "
+				"ssl library, ignored name for %s", p->str);
+#endif
+ 		if(!delegpt_add_addr_mlc(dp, &addr, addrlen, 0, 0,
+ 			tls_auth_name)) {
+ 			log_err("out of memory");
+Index: iterator/iter_hints.c
+===================================================================
+--- a/iterator/iter_hints.c
+++ b/iterator/iter_hints.c
+@@ -252,6 +252,11 @@
+ 				s->name, p->str);
+ 			return 0;
+ 		}
+#ifndef HAVE_SSL_SET1_HOST
+		if(auth_name)
+			log_err("no name verification functionality in "
+				"ssl library, ignored name for %s", p->str);
+#endif
+ 		if(!delegpt_add_addr_mlc(dp, &addr, addrlen, 0, 0,
+ 			auth_name)) {
+ 			log_err("out of memory");