Add a test for records not on the record boundary

Test that we check that key change messages appear on a record boundary.
Reviewed-by: NRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2875)

test/recipes/70-test_sslrecords.t

@@ -34,19 +34,14 @@ my $proxy = TLSProxy::Proxy->new(
     (!$ENV{HARNESS_ACTIVE} || $ENV{HARNESS_VERBOSE})
 );
 
+my $boundary_test_type;
+
 #Test 1: Injecting out of context empty records should fail
 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 = 11;
-if (!disabled("tls1_1")) {
-    $num_tests++;
-}
-if (!disabled("tls1_3")) {
-    $num_tests += 3;
-}
-plan tests => $num_tests;
+plan tests => 18;
 ok(TLSProxy::Message->fail(), "Out of context empty records test");
 
 #Test 2: Injecting in context empty records should succeed
@@ -133,8 +128,10 @@ $proxy->filter(\&add_unknown_record_type);
 $proxy->start();
 ok(TLSProxy::Message->fail(), "Unrecognised record type in TLS1.2");
 
-#Test 11: Sending an unrecognised record type in TLS1.1 should fail
-if (!disabled("tls1_1")) {
+SKIP: {
+    skip "TLSv1.1 disabled", 1 if disabled("tls1_1");
+
+    #Test 11: Sending an unrecognised record type in TLS1.1 should fail
     $proxy->clear();
     $proxy->clientflags("-tls1_1");
     $proxy->start();
@@ -149,7 +146,9 @@ $proxy->start();
 ok(TLSProxy::Message->fail(), "Changed record version in TLS1.2");
 
 #TLS1.3 specific tests
-if (!disabled("tls1_3")) {
+SKIP: {
+    skip "TLSv1.3 disabled", 4 if disabled("tls1_3");
+
     #Test 13: Sending a different record version in TLS1.3 should succeed
     $proxy->clear();
     $proxy->filter(\&change_version);
@@ -168,6 +167,36 @@ if (!disabled("tls1_3")) {
     $proxy->filter(\&change_outer_record_type);
     $proxy->start();
     ok(TLSProxy::Message->fail(), "Wrong outer record type in TLS1.3");
+
+    use constant {
+        DATA_AFTER_SERVER_HELLO => 0,
+        DATA_AFTER_FINISHED => 1,
+        DATA_AFTER_KEY_UPDATE => 2
+    };
+
+    #Test 16: Sending a ServerHello which doesn't end on a record boundary
+    #         should fail
+    $proxy->clear();
+    $boundary_test_type = DATA_AFTER_SERVER_HELLO;
+    $proxy->filter(\&not_on_record_boundary);
+    $proxy->start();
+    ok(TLSProxy::Message->fail(), "Record not on bounday in TLS1.3 (ServerHello)");
+
+    #Test 17: Sending a Finished which doesn't end on a record boundary
+    #         should fail
+    $proxy->clear();
+    $boundary_test_type = DATA_AFTER_FINISHED;
+    $proxy->filter(\&not_on_record_boundary);
+    $proxy->start();
+    ok(TLSProxy::Message->fail(), "Record not on bounday in TLS1.3 (Finished)");
+
+    #Test 18: Sending a KeyUpdate which doesn't end on a record boundary
+    #         should fail
+    $proxy->clear();
+    $boundary_test_type = DATA_AFTER_KEY_UPDATE;
+    $proxy->filter(\&not_on_record_boundary);
+    $proxy->start();
+    ok(TLSProxy::Message->fail(), "Record not on bounday in TLS1.3 (KeyUpdate)");
  }
 
 
@@ -459,3 +488,75 @@ sub change_outer_record_type
     $i++;
     ${$proxy->record_list}[$i]->outer_content_type(TLSProxy::Record::RT_HANDSHAKE);
 }
+
+sub not_on_record_boundary
+{
+    my $proxy = shift;
+    my $data;
+
+    #Find server's first flight
+    if ($proxy->flight != 1) {
+        return;
+    }
+
+    if ($boundary_test_type == DATA_AFTER_SERVER_HELLO) {
+        #Merge the ServerHello and EncryptedExtensions records into one
+        my $i;
+        for ($i = 0; ${$proxy->record_list}[$i]->flight() < 1; $i++) {
+            next;
+        }
+        $data = ${$proxy->record_list}[$i]->data();
+        $data .= ${$proxy->record_list}[$i + 1]->decrypt_data();
+        ${$proxy->record_list}[$i]->data($data);
+        ${$proxy->record_list}[$i]->len(length $data);
+
+        #Delete the old EncryptedExtensions record
+        splice @{$proxy->record_list}, $i + 1, 1;
+    } elsif ($boundary_test_type == DATA_AFTER_FINISHED) {
+        $data = ${$proxy->record_list}[-1]->decrypt_data;
+
+        #Add a KeyUpdate message onto the end of the Finished record
+        my $keyupdate = pack "C5",
+            0x18, # KeyUpdate
+            0x00, 0x00, 0x01, # Message length
+            0x00; # Update not requested
+
+        $data .= $keyupdate;
+
+        #Add content type and tag
+        $data .= pack("C", TLSProxy::Record::RT_HANDSHAKE).("\0"x16);
+
+        #Update the record
+        ${$proxy->record_list}[-1]->data($data);
+        ${$proxy->record_list}[-1]->len(length $data);
+    } else {
+        #KeyUpdates must end on a record boundary
+
+        my $record = TLSProxy::Record->new(
+            1,
+            TLSProxy::Record::RT_APPLICATION_DATA,
+            TLSProxy::Record::VERS_TLS_1_0,
+            0,
+            0,
+            0,
+            0,
+            "",
+            ""
+        );
+
+        #Add two KeyUpdate messages into a single record
+        my $keyupdate = pack "C5",
+            0x18, # KeyUpdate
+            0x00, 0x00, 0x01, # Message length
+            0x00; # Update not requested
+
+        $data = $keyupdate.$keyupdate;
+
+        #Add content type and tag
+        $data .= pack("C", TLSProxy::Record::RT_HANDSHAKE).("\0"x16);
+
+        $record->data($data);
+        $record->len(length $data);
+        push @{$proxy->record_list}, $record;
+    }
+}