Diff: TARGET_MCU_NRF51822/sdk/source/drivers_nrf/hal/nrf_ecb.c

Revision:

640:c90ae1400bf2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TARGET_MCU_NRF51822/sdk/source/drivers_nrf/hal/nrf_ecb.c	Wed Sep 14 14:39:43 2016 +0100
@@ -0,0 +1,93 @@
+/*
+ * Copyright (c) Nordic Semiconductor ASA
+ * 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 Nordic Semiconductor ASA nor the names of other
+ *   contributors to this software may be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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.
+ *
+ */ 
+
+/** 
+ * @file
+ * @brief Implementation of AES ECB driver
+ */
+
+
+//lint -e438
+
+#include <stdlib.h>
+#include <stdbool.h>
+#include <string.h>
+#include "nrf.h" 
+#include "nrf_ecb.h"
+
+static uint8_t  ecb_data[48];   ///< ECB data structure for RNG peripheral to access.
+static uint8_t* ecb_key;        ///< Key:        Starts at ecb_data 
+static uint8_t* ecb_cleartext;  ///< Cleartext:  Starts at ecb_data + 16 bytes.
+static uint8_t* ecb_ciphertext; ///< Ciphertext: Starts at ecb_data + 32 bytes.
+
+bool nrf_ecb_init(void)
+{
+  ecb_key = ecb_data;
+  ecb_cleartext  = ecb_data + 16;
+  ecb_ciphertext = ecb_data + 32;
+
+  NRF_ECB->ECBDATAPTR = (uint32_t)ecb_data;
+  return true;
+}
+
+
+bool nrf_ecb_crypt(uint8_t * dest_buf, const uint8_t * src_buf)
+{
+   uint32_t counter = 0x1000000;
+   if(src_buf != ecb_cleartext)
+   {
+     memcpy(ecb_cleartext,src_buf,16);
+   }
+   NRF_ECB->EVENTS_ENDECB = 0;
+   NRF_ECB->TASKS_STARTECB = 1;
+   while(NRF_ECB->EVENTS_ENDECB == 0)
+   {
+    counter--;
+    if(counter == 0)
+    {
+      return false;
+    }
+   }
+   NRF_ECB->EVENTS_ENDECB = 0;
+   if(dest_buf != ecb_ciphertext)
+   {
+     memcpy(dest_buf,ecb_ciphertext,16);
+   }
+   return true;
+}
+
+void nrf_ecb_set_key(const uint8_t * key)
+{
+  memcpy(ecb_key,key,16);
+}
+
+