Moved TLS stack to its own library

1 files changed, 170 insertions, 0 deletions

diff --git a/src/libtls/tls.h b/src/libtls/tls.h
new file mode 100644
index 000000000..67ee74230
--- /dev/null
+++ b/src/libtls/tls.h
@@ -0,0 +1,170 @@
+/*
+ * Copyright (C) 2010 Martin Willi
+ * Copyright (C) 2010 revosec AG
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program 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 General Public License
+ * for more details.
+ */
+
+/**
+ * @defgroup libtls libtls
+ *
+ * @addtogroup libtls
+ * TLS implementation on top of libstrongswan
+ *
+ * @defgroup tls tls
+ * @{ @ingroup libtls
+ */
+
+#ifndef TLS_H_
+#define TLS_H_
+
+typedef enum tls_version_t tls_version_t;
+typedef enum tls_content_type_t tls_content_type_t;
+typedef enum tls_handshake_type_t tls_handshake_type_t;
+typedef struct tls_t tls_t;
+
+#include <library.h>
+
+/**
+ * TLS/SSL version numbers
+ */
+enum tls_version_t {
+	SSL_2_0 = 0x0200,
+	SSL_3_0 = 0x0300,
+	TLS_1_0 = 0x0301,
+	TLS_1_1 = 0x0302,
+	TLS_1_2 = 0x0303,
+};
+
+/**
+ * Enum names for tls_version_t
+ */
+extern enum_name_t *tls_version_names;
+
+/**
+ * TLS higher level content type
+ */
+enum tls_content_type_t {
+	TLS_CHANGE_CIPHER_SPEC = 20,
+	TLS_ALERT = 21,
+	TLS_HANDSHAKE = 22,
+	TLS_APPLICATION_DATA = 23,
+};
+
+/**
+ * Enum names for tls_content_type_t
+ */
+extern enum_name_t *tls_content_type_names;
+
+/**
+ * TLS handshake subtype
+ */
+enum tls_handshake_type_t {
+	TLS_HELLO_REQUEST = 0,
+	TLS_CLIENT_HELLO = 1,
+	TLS_SERVER_HELLO = 2,
+	TLS_CERTIFICATE = 11,
+	TLS_SERVER_KEY_EXCHANGE = 12,
+	TLS_CERTIFICATE_REQUEST = 13,
+	TLS_SERVER_HELLO_DONE = 14,
+	TLS_CERTIFICATE_VERIFY = 15,
+	TLS_CLIENT_KEY_EXCHANGE = 16,
+	TLS_FINISHED = 20,
+};
+
+/**
+ * Enum names for tls_handshake_type_t
+ */
+extern enum_name_t *tls_handshake_type_names;
+
+/**
+ * A bottom-up driven TLS stack, suitable for EAP implementations.
+ */
+struct tls_t {
+
+	/**
+	 * Process a TLS record, pass it to upper layers.
+	 *
+	 * @param type		type of the TLS record to process
+	 * @param data		associated TLS record data
+	 * @return
+	 *					- SUCCESS if TLS negotiation complete
+	 *					- FAILED if TLS handshake failed
+	 *					- NEED_MORE if more invocations to process/build needed
+	 */
+	status_t (*process)(tls_t *this, tls_content_type_t type, chunk_t data);
+
+	/**
+	 * Query upper layer for TLS record, build protected record.
+	 *
+	 * @param type		type of the built TLS record
+	 * @param data		allocated data of the built TLS record
+	 * @return
+	 *					- SUCCESS if TLS negotiation complete
+	 *					- FAILED if TLS handshake failed
+	 *					- NEED_MORE if upper layers have more records to send
+	 *					- INVALID_STATE if more input records required
+	 */
+	status_t (*build)(tls_t *this, tls_content_type_t *type, chunk_t *data);
+
+	/**
+	 * Check if TLS stack is acting as a server.
+	 *
+	 * @return			TRUE if server, FALSE if peer
+	 */
+	bool (*is_server)(tls_t *this);
+
+	/**
+	 * Get the negotiated TLS/SSL version.
+	 *
+	 * @return			negotiated TLS version
+	 */
+	tls_version_t (*get_version)(tls_t *this);
+
+	/**
+	 * Set the negotiated TLS/SSL version.
+	 *
+	 * @param version	negotiated TLS version
+	 */
+	void (*set_version)(tls_t *this, tls_version_t version);
+
+	/**
+	 * Check if TLS negotiation completed successfully.
+	 *
+	 * @return			TRUE if TLS negotation and authentication complete
+	 */
+	bool (*is_complete)(tls_t *this);
+
+	/**
+	 * Get the MSK for EAP-TLS.
+	 *
+	 * @return			MSK, internal data
+	 */
+	chunk_t (*get_eap_msk)(tls_t *this);
+
+	/**
+	 * Destroy a tls_t.
+	 */
+	void (*destroy)(tls_t *this);
+};
+
+/**
+ * Create a tls instance.
+ *
+ * @param is_server		TRUE to act as server, FALSE for client
+ * @param server		server identity
+ * @param peer			peer identity
+ * @return				TLS stack
+ */
+tls_t *tls_create(bool is_server, identification_t *server,
+				  identification_t *peer);
+
+#endif /** TLS_H_ @}*/