Nordic Semiconductor / nrf51-sdk

Nordic nrf51 sdk sources. Mirrored from https://github.com/ARMmbed/nrf51-sdk.

Dependents:   nRF51822 nRF51822

source/nordic_sdk/components/drivers_nrf/hal/nrf_ecb.c@28:041dac1366b2, 2016-04-07 (annotated)

Committer:
vcoubard
Date:
Thu Apr 07 17:37:56 2016 +0100
Revision:
28:041dac1366b2
Parent:
20:a90c48eb1d30
Child:
29:286940b7ee5a
Synchronized with git rev 012b8118

Author: Liyou Zhou

Pull in files from sdk 10.0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
vcoubard 28:041dac1366b2 1 /* Copyright (c) 2012 Nordic Semiconductor. All Rights Reserved.
vcoubard 28:041dac1366b2 2 *
vcoubard 28:041dac1366b2 3 * The information contained herein is property of Nordic Semiconductor ASA.
vcoubard 28:041dac1366b2 4 * Terms and conditions of usage are described in detail in NORDIC
vcoubard 28:041dac1366b2 5 * SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
vcoubard 28:041dac1366b2 6 *
vcoubard 28:041dac1366b2 7 * Licensees are granted free, non-transferable use of the information. NO
vcoubard 28:041dac1366b2 8 * WARRANTY of ANY KIND is provided. This heading must NOT be removed from
vcoubard 28:041dac1366b2 9 * the file.
vcoubard 28:041dac1366b2 10 *
vcoubard 28:041dac1366b2 11 * $LastChangedRevision: 25419 $
vcoubard 28:041dac1366b2 12 */
Vincent Coubard 0:f2542974c862 13
Vincent Coubard 0:f2542974c862 14 /**
Vincent Coubard 0:f2542974c862 15 * @file
Vincent Coubard 0:f2542974c862 16 * @brief Implementation of AES ECB driver
Vincent Coubard 0:f2542974c862 17 */
Vincent Coubard 0:f2542974c862 18
Vincent Coubard 0:f2542974c862 19
Vincent Coubard 0:f2542974c862 20 //lint -e438
Vincent Coubard 0:f2542974c862 21
Vincent Coubard 0:f2542974c862 22 #include <stdlib.h>
Vincent Coubard 0:f2542974c862 23 #include <stdbool.h>
Vincent Coubard 0:f2542974c862 24 #include <string.h>
Vincent Coubard 0:f2542974c862 25 #include "nrf.h"
Vincent Coubard 0:f2542974c862 26 #include "nrf_ecb.h"
Vincent Coubard 0:f2542974c862 27
Vincent Coubard 0:f2542974c862 28 static uint8_t ecb_data[48]; ///< ECB data structure for RNG peripheral to access.
Vincent Coubard 0:f2542974c862 29 static uint8_t* ecb_key; ///< Key: Starts at ecb_data
Vincent Coubard 0:f2542974c862 30 static uint8_t* ecb_cleartext; ///< Cleartext: Starts at ecb_data + 16 bytes.
Vincent Coubard 0:f2542974c862 31 static uint8_t* ecb_ciphertext; ///< Ciphertext: Starts at ecb_data + 32 bytes.
Vincent Coubard 0:f2542974c862 32
Vincent Coubard 0:f2542974c862 33 bool nrf_ecb_init(void)
Vincent Coubard 0:f2542974c862 34 {
Vincent Coubard 0:f2542974c862 35 ecb_key = ecb_data;
Vincent Coubard 0:f2542974c862 36 ecb_cleartext = ecb_data + 16;
Vincent Coubard 0:f2542974c862 37 ecb_ciphertext = ecb_data + 32;
Vincent Coubard 0:f2542974c862 38
Vincent Coubard 0:f2542974c862 39 NRF_ECB->ECBDATAPTR = (uint32_t)ecb_data;
Vincent Coubard 0:f2542974c862 40 return true;
Vincent Coubard 0:f2542974c862 41 }
Vincent Coubard 0:f2542974c862 42
Vincent Coubard 0:f2542974c862 43
Vincent Coubard 0:f2542974c862 44 bool nrf_ecb_crypt(uint8_t * dest_buf, const uint8_t * src_buf)
Vincent Coubard 0:f2542974c862 45 {
Vincent Coubard 0:f2542974c862 46 uint32_t counter = 0x1000000;
Vincent Coubard 0:f2542974c862 47 if(src_buf != ecb_cleartext)
Vincent Coubard 0:f2542974c862 48 {
Vincent Coubard 0:f2542974c862 49 memcpy(ecb_cleartext,src_buf,16);
Vincent Coubard 0:f2542974c862 50 }
Vincent Coubard 0:f2542974c862 51 NRF_ECB->EVENTS_ENDECB = 0;
Vincent Coubard 0:f2542974c862 52 NRF_ECB->TASKS_STARTECB = 1;
Vincent Coubard 0:f2542974c862 53 while(NRF_ECB->EVENTS_ENDECB == 0)
Vincent Coubard 0:f2542974c862 54 {
Vincent Coubard 0:f2542974c862 55 counter--;
Vincent Coubard 0:f2542974c862 56 if(counter == 0)
Vincent Coubard 0:f2542974c862 57 {
Vincent Coubard 0:f2542974c862 58 return false;
Vincent Coubard 0:f2542974c862 59 }
Vincent Coubard 0:f2542974c862 60 }
Vincent Coubard 0:f2542974c862 61 NRF_ECB->EVENTS_ENDECB = 0;
Vincent Coubard 0:f2542974c862 62 if(dest_buf != ecb_ciphertext)
Vincent Coubard 0:f2542974c862 63 {
Vincent Coubard 0:f2542974c862 64 memcpy(dest_buf,ecb_ciphertext,16);
Vincent Coubard 0:f2542974c862 65 }
Vincent Coubard 0:f2542974c862 66 return true;
Vincent Coubard 0:f2542974c862 67 }
Vincent Coubard 0:f2542974c862 68
Vincent Coubard 0:f2542974c862 69 void nrf_ecb_set_key(const uint8_t * key)
Vincent Coubard 0:f2542974c862 70 {
Vincent Coubard 0:f2542974c862 71 memcpy(ecb_key,key,16);
Vincent Coubard 0:f2542974c862 72 }
Vincent Coubard 0:f2542974c862 73
vcoubard 1:ebc0e0ef0a11 74