Empty session ticket: add a test

Reviewed-by: Matt Caswell <matt@openssl.org>

test/recipes/70-test_sslsessiontick.t

@@ -82,7 +82,7 @@ my $proxy = TLSProxy::Proxy->new(
     top_file("apps", "server.pem")
 );
 
-plan tests => 5;
+plan tests => 6;
 
 #Test 1: By default with no existing session we should get a session ticket
 #Expected result: ClientHello extension seen; ServerHello extension seen
@@ -135,6 +135,27 @@ $proxy->clientstart();
 checkmessages(5, "Session resumption with ticket capable client without a "
                  ."ticket", 1, 1, 1, 0);
 
+#Test 6: Client accepts empty ticket.
+#Expected result: ClientHello extension seen; ServerHello extension seen;
+#                 NewSessionTicket message seen; Full handshake.
+clearall();
+$proxy->filter(\&ticket_filter);
+$proxy->start();
+checkmessages(6, "Empty ticket test",  1, 1, 1, 1);
+
+
+sub ticket_filter
+{
+    my $proxy = shift;
+
+    foreach my $message (@{$proxy->message_list}) {
+        if ($message->mt == TLSProxy::Message::MT_NEW_SESSION_TICKET) {
+            $message->ticket("");
+            $message->repack();
+        }
+    }
+}
+
 sub checkmessages($$$$$$)
 {
     my ($testno, $testname, $testch, $testsh, $testtickseen, $testhand) = @_;
@@ -164,7 +185,7 @@ sub checkmessages($$$$$$)
 
 	plan tests => 5;
 
-	ok(TLSProxy::Message->success, "Hanshake");
+	ok(TLSProxy::Message->success, "Handshake");
 	ok(($testch && $chellotickext) || (!$testch && !$chellotickext),
 	   "ClientHello extension Session Ticket check");
 	ok(($testsh && $shellotickext) || (!$testsh && !$shellotickext),

util/TLSProxy/Message.pm

@@ -282,6 +282,15 @@ sub create_message
             [@message_frag_lens]
         );
         $message->parse();
+    } elsif ($mt == MT_NEW_SESSION_TICKET) {
+        $message = TLSProxy::NewSessionTicket->new(
+            $server,
+            $data,
+            [@message_rec_list],
+            $startoffset,
+            [@message_frag_lens]
+        );
+        $message->parse();
     } else {
         #Unknown message type
         $message = TLSProxy::Message->new(

util/TLSProxy/NewSessionTicket.pm

@@ -0,0 +1,125 @@
+# ====================================================================
+# Copyright (c) 1998-2015 The OpenSSL Project.  All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+#
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in
+#    the documentation and/or other materials provided with the
+#    distribution.
+#
+# 3. All advertising materials mentioning features or use of this
+#    software must display the following acknowledgment:
+#    "This product includes software developed by the OpenSSL Project
+#    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
+#
+# 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+#    endorse or promote products derived from this software without
+#    prior written permission. For written permission, please contact
+#    openssl-core@openssl.org.
+#
+# 5. Products derived from this software may not be called "OpenSSL"
+#    nor may "OpenSSL" appear in their names without prior written
+#    permission of the OpenSSL Project.
+#
+# 6. Redistributions of any form whatsoever must retain the following
+#    acknowledgment:
+#    "This product includes software developed by the OpenSSL Project
+#    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+#
+# THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+# EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+# PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
+# ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+# OF THE POSSIBILITY OF SUCH DAMAGE.
+# ====================================================================
+#
+# This product includes cryptographic software written by Eric Young
+# (eay@cryptsoft.com).  This product includes software written by Tim
+# Hudson (tjh@cryptsoft.com).
+
+use strict;
+
+package TLSProxy::NewSessionTicket;
+
+use parent 'TLSProxy::Message';
+
+sub new
+{
+    my $class = shift;
+    my ($server,
+        $data,
+        $records,
+        $startoffset,
+        $message_frag_lens) = @_;
+
+    my $self = $class->SUPER::new(
+        $server,
+        TLSProxy::Message::MT_NEW_SESSION_TICKET,
+        $data,
+        $records,
+        $startoffset,
+        $message_frag_lens);
+
+    $self->{ticket_lifetime_hint} = 0;
+    $self->{ticket} = "";
+
+    return $self;
+}
+
+sub parse
+{
+    my $self = shift;
+
+    my $ticket_lifetime_hint = unpack('N', $self->data);
+    my $ticket_len = unpack('n', $self->data);
+    my $ticket = substr($self->data, 6, $ticket_len);
+
+    $self->ticket_lifetime_hint($ticket_lifetime_hint);
+    $self->ticket($ticket);
+}
+
+
+#Reconstruct the on-the-wire message data following changes
+sub set_message_contents
+{
+    my $self = shift;
+    my $data;
+
+    $data = pack('N', $self->ticket_lifetime_hint);
+    $data .= pack('n', length($self->ticket));
+    $data .= $self->ticket;
+
+    $self->data($data);
+}
+
+#Read/write accessors
+sub ticket_lifetime_hint
+{
+    my $self = shift;
+    if (@_) {
+      $self->{ticket_lifetime_hint} = shift;
+    }
+    return $self->{ticket_lifetime_hint};
+}
+sub ticket
+{
+    my $self = shift;
+    if (@_) {
+      $self->{ticket} = shift;
+    }
+    return $self->{ticket};
+}
+1;

util/TLSProxy/Proxy.pm

@@ -63,6 +63,7 @@ use TLSProxy::Message;
 use TLSProxy::ClientHello;
 use TLSProxy::ServerHello;
 use TLSProxy::ServerKeyExchange;
+use TLSProxy::NewSessionTicket;
 
 sub new
 {