Adding upstream version 3.7.9.upstream/3.7.9upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 101 insertions, 0 deletions

diff --git a/lib/ext/post_handshake.c b/lib/ext/post_handshake.c
new file mode 100644
index 0000000..27fe1e7
--- /dev/null
+++ b/lib/ext/post_handshake.c
@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2017 Red Hat, Inc.
+ *
+ * Author: Nikos Mavrogiannopoulos
+ *
+ * This file is part of GnuTLS.
+ *
+ * The GnuTLS is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>
+ *
+ */
+
+/* This file contains the code for the Post-Handshake TLS 1.3 extension.
+ */
+
+#include "gnutls_int.h"
+#include "errors.h"
+#include "num.h"
+#include <hello_ext.h>
+#include <ext/post_handshake.h>
+#include "auth/cert.h"
+
+static int _gnutls_post_handshake_recv_params(gnutls_session_t session,
+					  const uint8_t * data,
+					  size_t data_size);
+static int _gnutls_post_handshake_send_params(gnutls_session_t session,
+					  gnutls_buffer_st * extdata);
+
+const hello_ext_entry_st ext_mod_post_handshake = {
+	.name = "Post Handshake Auth",
+	.tls_id = 49,
+	.gid = GNUTLS_EXTENSION_POST_HANDSHAKE,
+	.client_parse_point = GNUTLS_EXT_TLS,
+	.server_parse_point = GNUTLS_EXT_TLS,
+	.validity = GNUTLS_EXT_FLAG_TLS | GNUTLS_EXT_FLAG_CLIENT_HELLO,
+	.recv_func = _gnutls_post_handshake_recv_params,
+	.send_func = _gnutls_post_handshake_send_params,
+	.pack_func = NULL,
+	.unpack_func = NULL,
+	.deinit_func = NULL,
+	.cannot_be_overriden = 1
+};
+
+static int
+_gnutls_post_handshake_recv_params(gnutls_session_t session,
+			       const uint8_t * data, size_t _data_size)
+{
+	const version_entry_st *vers;
+
+	if (session->security_parameters.entity == GNUTLS_SERVER) {
+		vers = get_version(session);
+		if (unlikely(vers == NULL))
+			return 0;
+
+		if ((session->internals.flags & GNUTLS_POST_HANDSHAKE_AUTH) &&
+		    vers->post_handshake_auth)
+			session->security_parameters.post_handshake_auth = 1;
+	}
+
+	return 0;
+}
+
+/* returns data_size or a negative number on failure
+ */
+static int
+_gnutls_post_handshake_send_params(gnutls_session_t session,
+			       gnutls_buffer_st * extdata)
+{
+	gnutls_certificate_credentials_t cred;
+	const version_entry_st *max;
+
+	if (session->security_parameters.entity != GNUTLS_CLIENT ||
+	    !(session->internals.flags & GNUTLS_POST_HANDSHAKE_AUTH)) {
+		/* not sent on server side */
+		return 0;
+	}
+
+	cred = (gnutls_certificate_credentials_t)
+	    _gnutls_get_cred(session, GNUTLS_CRD_CERTIFICATE);
+	if (cred == NULL)	/* no certificate authentication */
+		return gnutls_assert_val(0);
+
+	max = _gnutls_version_max(session);
+	if (unlikely(max == NULL))
+		return gnutls_assert_val(0);
+
+	if (max->post_handshake_auth)
+		return GNUTLS_E_INT_RET_0;
+	else
+		return 0;
+}