DANE: do not trust a non-dnssec NXDOMAIN return for the TLSA lookup

diff --git a/src/src/transports/smtp.c b/src/src/transports/smtp.c
index 8f1e0bff8ac7592fe4a303b93c9eb68b8732cca5..9c95a412487073f325d1920206d3f45366289504 100644 (file)
--- a/src/src/transports/smtp.c
+++ b/src/src/transports/smtp.c
@@ -1209,7 +1209,7 @@ switch (rc)
 
   case DNS_NODATA:     /* no TLSA RR for this lookup */
   case DNS_NOMATCH:    /* no records at all for this lookup */
 
   case DNS_NODATA:     /* no TLSA RR for this lookup */
   case DNS_NOMATCH:    /* no records at all for this lookup */

-    return dane_required ? FAIL : FAIL_FORCED;
+    return dane_required ? FAIL : sec ? FAIL_FORCED : DEFER;

 
   default:
   case DNS_FAIL:
 
   default:
   case DNS_FAIL:

diff --git a/test/log/5840 b/test/log/5840
index 6d65bf25ee7c01785167d943f7cd0d1778658421..8d309e088a8a2b4e7d53d576ebe98424072711a0 100644 (file)
--- a/test/log/5840
+++ b/test/log/5840
@@ -33,10 +33,8 @@
 1999-03-02 09:44:33 10HmbI-0005vi-00 ** CALLER@dane.no.1.test.ex R=client T=send_to_server: DANE error: tlsa lookup FAIL
 1999-03-02 09:44:33 10HmbI-0005vi-00 CALLER@dane.no.1.test.ex: error ignored
 1999-03-02 09:44:33 10HmbI-0005vi-00 Completed
 1999-03-02 09:44:33 10HmbI-0005vi-00 ** CALLER@dane.no.1.test.ex R=client T=send_to_server: DANE error: tlsa lookup FAIL
 1999-03-02 09:44:33 10HmbI-0005vi-00 CALLER@dane.no.1.test.ex: error ignored
 1999-03-02 09:44:33 10HmbI-0005vi-00 Completed

-1999-03-02 09:44:33 10HmbJ-0005vi-00 [127.0.0.1] SSL verify error: depth=0 error=self signed certificate cert=/C=UK/O=The Exim Maintainers/OU=Test Suite/CN=Phil Pennock
-1999-03-02 09:44:33 10HmbJ-0005vi-00 [127.0.0.1] SSL verify error: certificate name mismatch: DN="/C=UK/O=The Exim Maintainers/OU=Test Suite/CN=Phil Pennock" H="dane.no.2.test.ex"
-1999-03-02 09:44:33 10HmbJ-0005vi-00 => CALLER@dane.no.2.test.ex R=client T=send_to_server H=dane.no.2.test.ex [127.0.0.1] X=TLSv1:AES256-SHA:256 CV=no DN="/C=UK/O=The Exim Maintainers/OU=Test Suite/CN=Phil Pennock" C="250 OK id=10HmbK-0005vi-00"
-1999-03-02 09:44:33 10HmbJ-0005vi-00 Completed
+1999-03-02 09:44:33 10HmbJ-0005vi-00 H=dane.no.2.test.ex [127.0.0.1]: DANE error: tlsa lookup DEFER
+1999-03-02 09:44:33 10HmbJ-0005vi-00 == CALLER@dane.no.2.test.ex R=client T=send_to_server defer (-36): DANE error: tlsa lookup DEFER

 1999-03-02 09:44:33 End queue run: pid=pppp -qf
 
 ******** SERVER ********
 1999-03-02 09:44:33 End queue run: pid=pppp -qf
 
 ******** SERVER ********


@@ -60,6 +58,3 @@
 1999-03-02 09:44:33 10HmbG-0005vi-00 => :blackhole: <CALLER@thishost.test.ex> R=server
 1999-03-02 09:44:33 10HmbG-0005vi-00 Completed
 1999-03-02 09:44:33 exim x.yz daemon started: pid=pppp, no queue runs, listening for SMTP on port 1225
 1999-03-02 09:44:33 10HmbG-0005vi-00 => :blackhole: <CALLER@thishost.test.ex> R=server
 1999-03-02 09:44:33 10HmbG-0005vi-00 Completed
 1999-03-02 09:44:33 exim x.yz daemon started: pid=pppp, no queue runs, listening for SMTP on port 1225

-1999-03-02 09:44:33 10HmbK-0005vi-00 <= <> H=localhost (myhost.test.ex) [127.0.0.1] P=esmtps X=TLSv1:AES256-SHA:256 CV=no S=sss id=E10HmbJ-0005vi-00@myhost.test.ex for CALLER@dane.no.2.test.ex
-1999-03-02 09:44:33 10HmbK-0005vi-00 => :blackhole: <CALLER@dane.no.2.test.ex> R=server
-1999-03-02 09:44:33 10HmbK-0005vi-00 Completed