llsec: Allow for sharing CCM*

core/net/llsec/ccm.h

@@ -0,0 +1,85 @@
+/**
+ * \addtogroup llsec802154
+ * @{
+ */
+
+/*
+ * Copyright (c) 2013, Hasso-Plattner-Institut.
+ * 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. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS 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 INSTITUTE OR 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 file is part of the Contiki operating system.
+ *
+ */
+
+/**
+ * \file
+ *         CCM* header file.
+ * \author
+ *         Konrad Krentz <konrad.krentz@gmail.com>
+ */
+
+#ifndef CCM_H_
+#define CCM_H_
+
+#include "contiki.h"
+#include "net/mac/frame802154.h"
+
+/* see RFC 3610 */
+#define CCM_AUTH_FLAGS(Adata, M) ((Adata ? (1 << 6) : 0) | (((M - 2) >> 1) << 3) | 1)
+#define CCM_ENCRYPTION_FLAGS     1
+
+#ifdef CCM_CONF
+#define CCM CCM_CONF
+#else /* CCM_CONF */
+#define CCM ccm_driver
+#endif /* CCM_CONF */
+
+/**
+ * Structure of CCM drivers.
+ */
+struct ccm_driver {
+  
+   /**
+    * \brief         Generates a MIC over the frame in the packetbuf.
+    * \param result  The generated MIC will be put here
+    * \param mic_len  <= 16; set to LLSEC802154_MIC_LENGTH to be compliant
+    */
+  void (* mic)(const uint8_t *extended_source_address,
+      uint8_t *result,
+      uint8_t mic_len);
+  
+  /**
+   * \brief XORs the frame in the packetbuf with the key stream.
+   */
+  void (* ctr)(const uint8_t *extended_source_address);
+};
+
+extern const struct ccm_driver CCM;
+
+#endif /* CCM_H_ */
+
+/** @} */