CC2538: Add AES-128 driver

cpu/cc2538/Makefile.cc2538

@@ -54,6 +54,7 @@ CONTIKI_CPU_DIRS += ../cc253x/usb/common ../cc253x/usb/common/cdc-acm
 CONTIKI_CPU_SOURCEFILES += clock.c rtimer-arch.c uart.c watchdog.c
 CONTIKI_CPU_SOURCEFILES += nvic.c cpu.c sys-ctrl.c gpio.c ioc.c spi.c adc.c
 CONTIKI_CPU_SOURCEFILES += crypto.c aes.c ecb.c ccm.c sha256.c
+CONTIKI_CPU_SOURCEFILES += cc2538-aes-128.c
 CONTIKI_CPU_SOURCEFILES += cc2538-rf.c udma.c lpm.c
 CONTIKI_CPU_SOURCEFILES += pka.c bignum-driver.c ecc-driver.c ecc-algorithm.c
 CONTIKI_CPU_SOURCEFILES += ecc-curve.c

cpu/cc2538/dev/cc2538-aes-128.c

@@ -0,0 +1,119 @@
+/*
+ * Copyright (c) 2015, 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.
+ */
+/**
+ * \addtogroup cc2538-aes-128
+ * @{
+ *
+ * \file
+ *         Implementation of the AES-128 driver for the CC2538 SoC
+ * \author
+ *         Konrad Krentz <konrad.krentz@gmail.com>
+ */
+#include "contiki.h"
+#include "dev/ecb.h"
+#include "dev/cc2538-aes-128.h"
+
+#include <stdint.h>
+#include <stdio.h>
+/*---------------------------------------------------------------------------*/
+#define MODULE_NAME     "cc2538-aes-128"
+
+#define DEBUG 0
+#if DEBUG
+#define PRINTF(...) printf(__VA_ARGS__)
+#else
+#define PRINTF(...)
+#endif
+/*---------------------------------------------------------------------------*/
+static uint8_t
+enable_crypto(void)
+{
+  uint8_t enabled = CRYPTO_IS_ENABLED();
+  if(!enabled) {
+    crypto_enable();
+  }
+  return enabled;
+}
+/*---------------------------------------------------------------------------*/
+static void
+restore_crypto(uint8_t enabled)
+{
+  if(!enabled) {
+    crypto_disable();
+  }
+}
+/*---------------------------------------------------------------------------*/
+static void
+set_key(const uint8_t *key)
+{
+  uint8_t crypto_enabled, ret;
+
+  crypto_enabled = enable_crypto();
+
+  ret = aes_load_keys(key, AES_KEY_STORE_SIZE_KEY_SIZE_128, 1,
+                      CC2538_AES_128_KEY_AREA);
+  if(ret != CRYPTO_SUCCESS) {
+    PRINTF("%s: aes_load_keys() error %u\n", MODULE_NAME, ret);
+  }
+
+  restore_crypto(crypto_enabled);
+}
+/*---------------------------------------------------------------------------*/
+static void
+encrypt(uint8_t *plaintext_and_result)
+{
+  uint8_t crypto_enabled, ret;
+  int8_t res;
+
+  crypto_enabled = enable_crypto();
+
+  ret = ecb_crypt_start(true, CC2538_AES_128_KEY_AREA, plaintext_and_result,
+                        plaintext_and_result, AES_128_BLOCK_SIZE, NULL);
+  if(ret != CRYPTO_SUCCESS) {
+    PRINTF("%s: ecb_crypt_start() error %u\n", MODULE_NAME, ret);
+    restore_crypto(crypto_enabled);
+    return;
+  }
+
+  while((res = ecb_crypt_check_status()) == CRYPTO_PENDING);
+  if(res != CRYPTO_SUCCESS) {
+    PRINTF("%s: ecb_crypt_check_status() error %d\n", MODULE_NAME, res);
+  }
+
+  restore_crypto(crypto_enabled);
+}
+/*---------------------------------------------------------------------------*/
+const struct aes_128_driver cc2538_aes_128_driver = {
+  set_key,
+  encrypt
+};
+
+/** @} */

cpu/cc2538/dev/cc2538-aes-128.h

@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2015, 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.
+ */
+/**
+ * \addtogroup cc2538-aes
+ * @{
+ *
+ * \defgroup cc2538-aes-128 CC2538 AES-128
+ *
+ * AES-128 driver for the CC2538 SoC
+ * @{
+ *
+ * \file
+ *         Header file of the AES-128 driver for the CC2538 SoC
+ * \author
+ *         Konrad Krentz <konrad.krentz@gmail.com>
+ */
+#ifndef CC2538_AES_128_H_
+#define CC2538_AES_128_H_
+
+#include "lib/aes-128.h"
+/*---------------------------------------------------------------------------*/
+#ifdef CC2538_AES_128_CONF_KEY_AREA
+#define CC2538_AES_128_KEY_AREA         CC2538_AES_128_CONF_KEY_AREA
+#else
+#define CC2538_AES_128_KEY_AREA         0
+#endif
+/*---------------------------------------------------------------------------*/
+extern const struct aes_128_driver cc2538_aes_128_driver;
+
+#endif /* CC2538_AES_128_H_ */
+
+/**
+ * @}
+ * @}
+ */

cpu/cc2538/dev/crypto.h

@@ -44,6 +44,8 @@
 #define CRYPTO_H_
 
 #include "contiki.h"
+#include "dev/sys-ctrl.h"
+#include "reg.h"
 /*---------------------------------------------------------------------------*/
 /** \name Crypto drivers return codes
  * @{
@@ -54,6 +56,18 @@
 #define CRYPTO_NULL_ERROR             2
 #define CRYPTO_RESOURCE_IN_USE        3
 #define CRYPTO_DMA_BUS_ERROR          4
+/** @} */
+/*---------------------------------------------------------------------------*/
+/** \name Crypto macros
+ * @{
+ */
+
+/** \brief Indicates whether the AES/SHA cryptoprocessor is enabled
+ * \return Boolean value indicating whether the AES/SHA cryptoprocessor is
+ * enabled
+ */
+#define CRYPTO_IS_ENABLED() (!!(REG(SYS_CTRL_RCGCSEC) & SYS_CTRL_RCGCSEC_AES))
+
 /** @} */
 /*---------------------------------------------------------------------------*/
 /** \name Crypto functions

platform/cc2538dk/Makefile.cc2538dk

@@ -26,7 +26,7 @@ include $(CONTIKI_CPU)/Makefile.cc2538
 
 MODULES += core/net core/net/mac \
            core/net/mac/contikimac \
-           core/net/llsec
+           core/net/llsec core/net/llsec/noncoresec
 
 PYTHON = python
 BSL_FLAGS += -e -w -v

platform/cc2538dk/contiki-conf.h

@@ -500,6 +500,20 @@ typedef uint32_t rtimer_clock_t;
 #endif /* NETSTACK_CONF_WITH_IPV6 */
 /** @} */
 /*---------------------------------------------------------------------------*/
+/**
+ * \name Security
+ *
+ * @{
+ */
+#ifndef CRYPTO_CONF_INIT
+#define CRYPTO_CONF_INIT        1 /**< Whether to init cryptoprocessor */
+#endif
+
+#ifndef AES_128_CONF
+#define AES_128_CONF            cc2538_aes_128_driver /**< AES-128 driver */
+#endif
+/** @} */
+/*---------------------------------------------------------------------------*/
 
 #endif /* CONTIKI_CONF_H_ */
 

platform/cc2538dk/contiki-main.c

@@ -56,6 +56,7 @@
 #include "dev/slip.h"
 #include "dev/cc2538-rf.h"
 #include "dev/udma.h"
+#include "dev/crypto.h"
 #include "usb/usb-serial.h"
 #include "lib/random.h"
 #include "net/netstack.h"
@@ -201,6 +202,12 @@ main(void)
   ctimer_init();
 
   set_rf_params();
+
+#if CRYPTO_CONF_INIT
+  crypto_init();
+  crypto_disable();
+#endif
+
   netstack_init();
 
 #if NETSTACK_CONF_WITH_IPV6

platform/zoul/Makefile.zoul

@@ -45,7 +45,7 @@ include $(CONTIKI_CPU)/Makefile.cc2538
 
 MODULES += core/net core/net/mac \
            core/net/mac/contikimac \
-           core/net/llsec dev/cc1200
+           core/net/llsec core/net/llsec/noncoresec dev/cc1200
 
 BSL = $(CONTIKI)/tools/cc2538-bsl/cc2538-bsl.py
 

platform/zoul/contiki-conf.h

@@ -568,6 +568,20 @@ typedef uint32_t rtimer_clock_t;
 #endif /* NETSTACK_CONF_WITH_IPV6 */
 /** @} */
 /*---------------------------------------------------------------------------*/
+/**
+ * \name Security
+ *
+ * @{
+ */
+#ifndef CRYPTO_CONF_INIT
+#define CRYPTO_CONF_INIT        1 /**< Whether to init cryptoprocessor */
+#endif
+
+#ifndef AES_128_CONF
+#define AES_128_CONF            cc2538_aes_128_driver /**< AES-128 driver */
+#endif
+/** @} */
+/*---------------------------------------------------------------------------*/
 
 #endif /* CONTIKI_CONF_H_ */
 

platform/zoul/contiki-main.c

@@ -57,6 +57,7 @@
 #include "dev/slip.h"
 #include "dev/cc2538-rf.h"
 #include "dev/udma.h"
+#include "dev/crypto.h"
 #include "usb/usb-serial.h"
 #include "lib/random.h"
 #include "net/netstack.h"
@@ -195,6 +196,11 @@ main(void)
 
   board_init();
 
+#if CRYPTO_CONF_INIT
+  crypto_init();
+  crypto_disable();
+#endif
+
   netstack_init();
   set_rf_params();