OpenSSL: Fix aggregation of messages.

Broken-by: a5ffa9b475

diff --git a/doc/doc-txt/ChangeLog b/doc/doc-txt/ChangeLog
index 7a0a9c6d3edfa89257cecda114f0eeab321f1429..2085a3b7bc5248c794d5b5e3eeb7fc58d3356a1e 100644 (file)
--- a/doc/doc-txt/ChangeLog
+++ b/doc/doc-txt/ChangeLog
@@ -42,6 +42,11 @@ JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
       the OS reports them interleaved with other addresses.
 
+JH/10 OpenSSL: Fix aggregation of messages.  Previously, when PIPELINING was
+      used both for input and for a verify callout, both encrypted, SMTP
+      responses being sent by the server could be lost.  This resulted in
+      dropped connections and sometimes bounces generated by a peer sending
+      to this system.
 
 
 Exim version 4.92

diff --git a/src/src/tls-openssl.c b/src/src/tls-openssl.c
index d37c789704336c119e09a62b76bec61c3c588a00..5a5e1464ba5665d7518e251c320764fb99f35505 100644 (file)
--- a/src/src/tls-openssl.c
+++ b/src/src/tls-openssl.c
@@ -289,6 +289,7 @@ Server:
 typedef struct {
   SSL_CTX *    ctx;
   SSL *                ssl;
+  gstring *    corked;
 } exim_openssl_client_tls_ctx;
 
 static SSL_CTX *server_ctx = NULL;
@@ -2523,6 +2524,7 @@ BOOL require_ocsp = FALSE;
 rc = store_pool;
 store_pool = POOL_PERM;
 exim_client_ctx = store_get(sizeof(exim_openssl_client_tls_ctx));
+exim_client_ctx->corked = NULL;
 store_pool = rc;
 
 #ifdef SUPPORT_DANE
@@ -2979,8 +2981,12 @@ tls_write(void * ct_ctx, const uschar *buff, size_t len, BOOL more)
 {
 size_t olen = len;
 int outbytes, error;
-SSL * ssl = ct_ctx ? ((exim_openssl_client_tls_ctx *)ct_ctx)->ssl : server_ssl;
-static gstring * corked = NULL;
+SSL * ssl = ct_ctx
+  ? ((exim_openssl_client_tls_ctx *)ct_ctx)->ssl : server_ssl;
+static gstring * server_corked = NULL;
+gstring ** corkedp = ct_ctx
+  ? &((exim_openssl_client_tls_ctx *)ct_ctx)->corked : &server_corked;
+gstring * corked = *corkedp;
 
 DEBUG(D_tls) debug_printf("%s(%p, %lu%s)\n", __FUNCTION__,
   buff, (unsigned long)len, more ? ", more" : "");
@@ -2988,7 +2994,9 @@ DEBUG(D_tls) debug_printf("%s(%p, %lu%s)\n", __FUNCTION__,
 /* Lacking a CORK or MSG_MORE facility (such as GnuTLS has) we copy data when
 "more" is notified.  This hack is only ok if small amounts are involved AND only
 one stream does it, in one context (i.e. no store reset).  Currently it is used
-for the responses to the received SMTP MAIL , RCPT, DATA sequence, only. */
+for the responses to the received SMTP MAIL , RCPT, DATA sequence, only.
+We support callouts done by the server process by using a separate client
+context for the stashed information. */
 /* + if PIPE_COMMAND, banner & ehlo-resp for smmtp-on-connect. Suspect there's
 a store reset there, so use POOL_PERM. */
 /* + if CHUNKING, cmds EHLO,MAIL,RCPT(s),BDAT */
@@ -3007,10 +3015,13 @@ if ((more || corked))
 #endif
 
   if (more)
+    {
+    *corkedp = corked;
     return len;
+    }
   buff = CUS corked->s;
   len = corked->ptr;
-  corked = NULL;
+  *corkedp = NULL;
   }
 
 for (int left = len; left > 0;)

diff --git a/test/confs/2152 b/test/confs/2152
new file mode 100644 (file)
index 0000000..f783192
--- /dev/null
+++ b/test/confs/2152
@@ -0,0 +1,76 @@
+# Exim test configuration 2152
+
+SERVER=
+
+.include DIR/aux-var/tls_conf_prefix
+
+primary_hostname = myhost.test.ex
+
+# ----- Main settings -----
+
+acl_smtp_rcpt = chk_r
+
+#log_selector =  +tls_peerdn
+
+queue_only
+queue_run_in_order
+
+tls_advertise_hosts = *
+
+tls_certificate = DIR/aux-fixed/cert1
+tls_privatekey =  DIR/aux-fixed/cert1
+
+
+# ----- ACL -----
+
+begin acl
+
+chk_r:
+  accept       condition =     ${if = {$received_port}{PORT_D2}}
+  accept       verify =        recipient/callout
+
+# ----- Routers -----
+
+begin routers
+
+client:
+  driver = accept
+  condition = ${if !eq {SERVER}{server}}
+  transport = send_to_server
+
+srvr_v:
+  driver = accept
+  verify_only
+  transport = send_to_server_v
+
+
+# ----- Transports -----
+
+begin transports
+
+send_to_server:
+  driver =     smtp
+  allow_localhost
+  hosts =      127.0.0.1
+  port =       PORT_D
+  tls_verify_certificates = DIR/aux-fixed/cert1
+  tls_verify_cert_hostnames = :
+
+send_to_server_v:
+  driver =     smtp
+  allow_localhost
+  hosts =      127.0.0.1
+  port =       PORT_D2
+  tls_verify_certificates = DIR/aux-fixed/cert1
+  tls_verify_cert_hostnames = :
+
+
+# ----- Retry -----
+
+
+begin retry
+
+* * F,5d,10s
+
+
+# End

diff --git a/test/log/2152 b/test/log/2152
new file mode 100644 (file)
index 0000000..6796211
--- /dev/null
+++ b/test/log/2152
@@ -0,0 +1,9 @@
+1999-03-02 09:44:33 10HmaX-0005vi-00 <= CALLER@myhost.test.ex U=CALLER P=local S=sss
+1999-03-02 09:44:33 Start queue run: pid=pppp -qf
+1999-03-02 09:44:33 10HmaX-0005vi-00 => a@test.ex R=client T=send_to_server H=127.0.0.1 [127.0.0.1] X=TLS1.x:ke-RSA-AES256-SHAnnn:xxx CV=yes C="250 OK id=10HmaY-0005vi-00"
+1999-03-02 09:44:33 10HmaX-0005vi-00 Completed
+1999-03-02 09:44:33 End queue run: pid=pppp -qf
+
+******** SERVER ********
+1999-03-02 09:44:33 exim x.yz daemon started: pid=pppp, no queue runs, listening for SMTP on port PORT_D port PORT_D2
+1999-03-02 09:44:33 10HmaY-0005vi-00 <= CALLER@myhost.test.ex H=localhost (myhost.test.ex) [127.0.0.1] P=esmtps X=TLS1.x:ke-RSA-AES256-SHAnnn:xxx CV=no S=sss id=E10HmaX-0005vi-00@myhost.test.ex