Add a test for the wrong version number in a record

Prior to TLS1.3 we check that the received record version number is correct.
In TLS1.3 we need to ignore the record version number. This adds a test to
make sure we do it correctly.
Reviewed-by: NRich Salz <rsalz@openssl.org>

test/recipes/70-test_sslrecords.t

@@ -39,10 +39,13 @@ my $content_type = TLSProxy::Record::RT_APPLICATION_DATA;
 my $inject_recs_num = 1;
 $proxy->serverflags("-tls1_2");
 $proxy->start() or plan skip_all => "Unable to start up Proxy for tests";
-my $num_tests = 10;
+my $num_tests = 11;
 if (!disabled("tls1_1")) {
     $num_tests++;
 }
+if (!disabled("tls1_3")) {
+    $num_tests++;
+}
 plan tests => $num_tests;
 ok(TLSProxy::Message->fail(), "Out of context empty records test");
 
@@ -137,6 +140,21 @@ if (!disabled("tls1_1")) {
     ok(TLSProxy::Message->fail(), "Unrecognised record type in TLS1.1");
 }
 
+#Test 12: Sending a different record version in TLS1.2 should fail
+$proxy->clear();
+$proxy->clientflags("-tls1_2");
+$proxy->filter(\&change_version);
+$proxy->start();
+ok(TLSProxy::Message->fail(), "Changed record version in TLS1.2");
+
+#Test 13: Sending a different record version in TLS1.3 should succeed
+if (!disabled("tls1_3")) {
+    $proxy->clear();
+    $proxy->filter(\&change_version);
+    $proxy->start();
+    ok(TLSProxy::Message->success(), "Changed record version in TLS1.3");
+}
+
 sub add_empty_recs_filter
 {
     my $proxy = shift;
@@ -388,3 +406,15 @@ sub add_unknown_record_type
 
     unshift @{$proxy->record_list}, $record;
 }
+
+sub change_version
+{
+    my $proxy = shift;
+
+    # We'll change a version after the initial version neg has taken place
+    if ($proxy->flight != 2) {
+        return;
+    }
+
+    (${$proxy->record_list}[-1])->version(TLSProxy::Record::VERS_TLS_1_1);
+}

util/TLSProxy/Record.pm

@@ -278,11 +278,6 @@ sub content_type
     my $self = shift;
     return $self->{content_type};
 }
-sub version
-{
-    my $self = shift;
-    return $self->{version};
-}
 sub sslv2
 {
     my $self = shift;
@@ -332,4 +327,12 @@ sub len
     }
     return $self->{len};
 }
+sub version
+{
+    my $self = shift;
+    if (@_) {
+      $self->{version} = shift;
+    }
+    return $self->{version};
+}
 1;