New variable $exim_version. Bug 306

[users/jgh/exim.git] / doc / doc-txt / experimental-spec.txt

diff --git a/doc/doc-txt/experimental-spec.txt b/doc/doc-txt/experimental-spec.txt
index 2d34de0f76d2e9a7c5c3f29e30ee90c2e8143070..4bcfecf048e72fdfbb4230e84563b898818d4414 100644 (file)
--- a/doc/doc-txt/experimental-spec.txt
+++ b/doc/doc-txt/experimental-spec.txt
@@ -791,7 +791,7 @@ expansion is done.  The current list of events is:
  msg:fail:internal     after  main       per recipient
  tcp:connect           before transport  per connection
  tcp:close             after  transport  per connection
- tls:cert              before transport  per certificate in verification chain
+ tls:cert              before both       per certificate in verification chain
  smtp:connect          after  transport  per connection
 
 The expansion is called for all event types, and should use the $event_name
@@ -816,12 +816,12 @@ The following variables are likely to be useful depending on the event type:
        tls_out_peercert
        lookup_dnssec_authenticated, tls_out_dane
        sending_ip_address, sending_port
-       message_exim_id
+       message_exim_id, verify_mode
 
 
 An example might look like:
 
-event_action = ${if = {msg:delivery}{$event_name} \
+event_action = ${if eq {msg:delivery}{$event_name} \
 {${lookup pgsql {SELECT * FROM record_Delivery( \
     '${quote_pgsql:$sender_address_domain}',\
     '${quote_pgsql:${lc:$sender_address_local_part}}', \
@@ -852,6 +852,10 @@ following will be forced:
 No other use is made of the result string.
 
 
+Known issues:
+- the tls:cert event is only called for the cert chain elements
+  received over the wire, with GnuTLS.  OpenSSL gives the entire
+  chain including thse loaded locally.
 
 
 Redis Lookup
@@ -1140,22 +1144,6 @@ the next hop does not support DSN.
 Adding it to a redirect router makes no difference.
 
 
-Certificate name checking
---------------------------------------------------------------
-The X509 certificates used for TLS are supposed be verified
-that they are owned by the expected host.  The coding of TLS
-support to date has not made these checks.
-
-If built with EXPERIMENTAL_CERTNAMES defined, code is
-included to do so, and a new smtp transport option
-"tls_verify_cert_hostname" supported which takes a list of
-names for which the checks must be made.  The host must
-also be in "tls_verify_hosts".
-
-Both Subject and Subject-Alternate-Name certificate fields
-are supported, as are wildcard certificates (limited to
-a single wildcard being the initial component of a 3-or-more
-component FQDN).
 
 
 DANE
@@ -1279,12 +1267,13 @@ MX, A and TLSA records.
 
 A TLSA lookup will be done if either of the above options match
 and the host-lookup succeded using dnssec.
-If the TLSA lookup succeeds, a TLS connection will be required
-for the host.
+If a TLSA lookup is done and succeeds, a DANE-verified TLS connection
+will be required for the host.
 
 (TODO: specify when fallback happens vs. when the host is not used)
 
-If dane is in use the following transport options are ignored:
+If DANE is requested and useable (see above) the following transport
+options are ignored:
   hosts_require_tls
   tls_verify_hosts
   tls_try_verify_hosts
@@ -1292,6 +1281,10 @@ If dane is in use the following transport options are ignored:
   tls_crl
   tls_verify_cert_hostnames
 
+If DANE is not usable, whether requested or not, and CA-anchored
+verification evaluation is wanted, the above variables should be set
+appropriately.
+
 Currently dnssec_request_domains must be active (need to think about that)
 and dnssec_require_domains is ignored.
 
@@ -1300,7 +1293,7 @@ in the delivery log line will show as "CV=dane".
 
 There is a new variable $tls_out_dane which will have "yes" if
 verification succeeded using DANE and "no" otherwise (only useful
-in combination with EXPERIMENTAL_TPDA), and a new variable
+in combination with EXPERIMENTAL_EVENT), and a new variable
 $tls_out_tlsa_usage (detailed above).