Maxim Integrated / Mbed OS MAXREFDES155#

DeepCover Embedded Security in IoT: Public-key Secured Data Paths

Dependencies:   MaximInterface

The MAXREFDES155# is an internet-of-things (IoT) embedded-security reference design, built to authenticate and control a sensing node using elliptic-curve-based public-key cryptography with control and notification from a web server.

The hardware includes an ARM® mbed™ shield and attached sensor endpoint. The shield contains a DS2476 DeepCover® ECDSA/SHA-2 coprocessor, Wifi communication, LCD push-button controls, and status LEDs. The sensor endpoint is attached to the shield using a 300mm cable and contains a DS28C36 DeepCover ECDSA/SHA-2 authenticator, IR-thermal sensor, and aiming laser for the IR sensor. The MAXREFDES155# is equipped with a standard Arduino® form-factor shield connector for immediate testing using an mbed board such as the MAX32600MBED#. The combination of these two devices represent an IoT device. Communication to the web server is accomplished with the shield Wifi circuitry. Communication from the shield to the attached sensor module is accomplished over I2C . The sensor module represents an IoT endpoint that generates small data with a requirement for message authenticity/integrity and secure on/off operational control.

The design is hierarchical with each mbed platform and shield communicating data from the sensor node to a web server that maintains a centralized log and dispatches notifications as necessary. The simplicity of this design enables rapid integration into any star-topology IoT network to provide security with the low overhead and cost provided by the ECDSA-P256 asymmetric-key and SHA-256 symmetric-key algorithms.

More information about the MAXREFDES155# is available on the Maxim Integrated website.

simplelink/source/nonos.c@0:33d4e66780c0, 2017-02-24 (annotated)

Committer:
IanBenzMaxim
Date:
Fri Feb 24 11:23:12 2017 -0600
Revision:
0:33d4e66780c0
Initial commit.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
IanBenzMaxim 0:33d4e66780c0 1 /*
IanBenzMaxim 0:33d4e66780c0 2 * nonos.c - CC31xx/CC32xx Host Driver Implementation
IanBenzMaxim 0:33d4e66780c0 3 *
IanBenzMaxim 0:33d4e66780c0 4 * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
IanBenzMaxim 0:33d4e66780c0 5 *
IanBenzMaxim 0:33d4e66780c0 6 *
IanBenzMaxim 0:33d4e66780c0 7 * Redistribution and use in source and binary forms, with or without
IanBenzMaxim 0:33d4e66780c0 8 * modification, are permitted provided that the following conditions
IanBenzMaxim 0:33d4e66780c0 9 * are met:
IanBenzMaxim 0:33d4e66780c0 10 *
IanBenzMaxim 0:33d4e66780c0 11 * Redistributions of source code must retain the above copyright
IanBenzMaxim 0:33d4e66780c0 12 * notice, this list of conditions and the following disclaimer.
IanBenzMaxim 0:33d4e66780c0 13 *
IanBenzMaxim 0:33d4e66780c0 14 * Redistributions in binary form must reproduce the above copyright
IanBenzMaxim 0:33d4e66780c0 15 * notice, this list of conditions and the following disclaimer in the
IanBenzMaxim 0:33d4e66780c0 16 * documentation and/or other materials provided with the
IanBenzMaxim 0:33d4e66780c0 17 * distribution.
IanBenzMaxim 0:33d4e66780c0 18 *
IanBenzMaxim 0:33d4e66780c0 19 * Neither the name of Texas Instruments Incorporated nor the names of
IanBenzMaxim 0:33d4e66780c0 20 * its contributors may be used to endorse or promote products derived
IanBenzMaxim 0:33d4e66780c0 21 * from this software without specific prior written permission.
IanBenzMaxim 0:33d4e66780c0 22 *
IanBenzMaxim 0:33d4e66780c0 23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
IanBenzMaxim 0:33d4e66780c0 24 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
IanBenzMaxim 0:33d4e66780c0 25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
IanBenzMaxim 0:33d4e66780c0 26 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
IanBenzMaxim 0:33d4e66780c0 27 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
IanBenzMaxim 0:33d4e66780c0 28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
IanBenzMaxim 0:33d4e66780c0 29 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
IanBenzMaxim 0:33d4e66780c0 30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
IanBenzMaxim 0:33d4e66780c0 31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
IanBenzMaxim 0:33d4e66780c0 32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
IanBenzMaxim 0:33d4e66780c0 33 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
IanBenzMaxim 0:33d4e66780c0 34 *
IanBenzMaxim 0:33d4e66780c0 35 */
IanBenzMaxim 0:33d4e66780c0 36
IanBenzMaxim 0:33d4e66780c0 37
IanBenzMaxim 0:33d4e66780c0 38
IanBenzMaxim 0:33d4e66780c0 39 /*****************************************************************************/
IanBenzMaxim 0:33d4e66780c0 40 /* Include files */
IanBenzMaxim 0:33d4e66780c0 41 /*****************************************************************************/
IanBenzMaxim 0:33d4e66780c0 42 #include "simplelink.h"
IanBenzMaxim 0:33d4e66780c0 43 #include "protocol.h"
IanBenzMaxim 0:33d4e66780c0 44 #include "driver.h"
IanBenzMaxim 0:33d4e66780c0 45
IanBenzMaxim 0:33d4e66780c0 46
IanBenzMaxim 0:33d4e66780c0 47 #ifndef SL_PLATFORM_MULTI_THREADED
IanBenzMaxim 0:33d4e66780c0 48
IanBenzMaxim 0:33d4e66780c0 49 #include "nonos.h"
IanBenzMaxim 0:33d4e66780c0 50
IanBenzMaxim 0:33d4e66780c0 51
IanBenzMaxim 0:33d4e66780c0 52 _SlNonOsCB_t g__SlNonOsCB = {0};
IanBenzMaxim 0:33d4e66780c0 53
IanBenzMaxim 0:33d4e66780c0 54
IanBenzMaxim 0:33d4e66780c0 55 _SlNonOsRetVal_t _SlNonOsSemSet(_SlNonOsSemObj_t* pSemObj , _SlNonOsSemObj_t Value)
IanBenzMaxim 0:33d4e66780c0 56 {
IanBenzMaxim 0:33d4e66780c0 57 *pSemObj = Value;
IanBenzMaxim 0:33d4e66780c0 58 return NONOS_RET_OK;
IanBenzMaxim 0:33d4e66780c0 59 }
IanBenzMaxim 0:33d4e66780c0 60
IanBenzMaxim 0:33d4e66780c0 61 _SlNonOsRetVal_t _SlNonOsSemGet(_SlNonOsSemObj_t* pSyncObj, _SlNonOsSemObj_t WaitValue, _SlNonOsSemObj_t SetValue, _SlNonOsTime_t Timeout)
IanBenzMaxim 0:33d4e66780c0 62 {
IanBenzMaxim 0:33d4e66780c0 63 #if (!defined (SL_TINY)) && (defined(sl_GetTimestamp))
IanBenzMaxim 0:33d4e66780c0 64 _SlTimeoutParams_t TimeoutInfo={0};
IanBenzMaxim 0:33d4e66780c0 65 #endif
IanBenzMaxim 0:33d4e66780c0 66
IanBenzMaxim 0:33d4e66780c0 67 /* If timeout 0 configured, just detect the value and return */
IanBenzMaxim 0:33d4e66780c0 68 if ((Timeout ==0) && (WaitValue == *pSyncObj))
IanBenzMaxim 0:33d4e66780c0 69 {
IanBenzMaxim 0:33d4e66780c0 70 *pSyncObj = SetValue;
IanBenzMaxim 0:33d4e66780c0 71 return NONOS_RET_OK;
IanBenzMaxim 0:33d4e66780c0 72 }
IanBenzMaxim 0:33d4e66780c0 73
IanBenzMaxim 0:33d4e66780c0 74 #if (!defined (SL_TINY)) && (defined(sl_GetTimestamp))
IanBenzMaxim 0:33d4e66780c0 75 if ((Timeout != NONOS_WAIT_FOREVER) && (Timeout != NONOS_NO_WAIT))
IanBenzMaxim 0:33d4e66780c0 76 {
IanBenzMaxim 0:33d4e66780c0 77 _SlDrvStartMeasureTimeout(&TimeoutInfo, Timeout);
IanBenzMaxim 0:33d4e66780c0 78 }
IanBenzMaxim 0:33d4e66780c0 79 #endif
IanBenzMaxim 0:33d4e66780c0 80
IanBenzMaxim 0:33d4e66780c0 81 #ifdef _SlSyncWaitLoopCallback
IanBenzMaxim 0:33d4e66780c0 82 _SlNonOsTime_t timeOutRequest = Timeout;
IanBenzMaxim 0:33d4e66780c0 83 #endif
IanBenzMaxim 0:33d4e66780c0 84 while (Timeout>0)
IanBenzMaxim 0:33d4e66780c0 85 {
IanBenzMaxim 0:33d4e66780c0 86 if (WaitValue == *pSyncObj)
IanBenzMaxim 0:33d4e66780c0 87 {
IanBenzMaxim 0:33d4e66780c0 88 *pSyncObj = SetValue;
IanBenzMaxim 0:33d4e66780c0 89 break;
IanBenzMaxim 0:33d4e66780c0 90 }
IanBenzMaxim 0:33d4e66780c0 91 #if (!defined (sl_GetTimestamp)) || (defined (SL_TINY_EXT))
IanBenzMaxim 0:33d4e66780c0 92 if (Timeout != NONOS_WAIT_FOREVER)
IanBenzMaxim 0:33d4e66780c0 93 {
IanBenzMaxim 0:33d4e66780c0 94 Timeout--;
IanBenzMaxim 0:33d4e66780c0 95 }
IanBenzMaxim 0:33d4e66780c0 96 #else
IanBenzMaxim 0:33d4e66780c0 97 if ((Timeout != NONOS_WAIT_FOREVER) && (Timeout != NONOS_NO_WAIT))
IanBenzMaxim 0:33d4e66780c0 98 {
IanBenzMaxim 0:33d4e66780c0 99 if (_SlDrvIsTimeoutExpired(&TimeoutInfo))
IanBenzMaxim 0:33d4e66780c0 100 {
IanBenzMaxim 0:33d4e66780c0 101 return (_SlNonOsRetVal_t)NONOS_RET_ERR;
IanBenzMaxim 0:33d4e66780c0 102 }
IanBenzMaxim 0:33d4e66780c0 103
IanBenzMaxim 0:33d4e66780c0 104 }
IanBenzMaxim 0:33d4e66780c0 105 #endif
IanBenzMaxim 0:33d4e66780c0 106
IanBenzMaxim 0:33d4e66780c0 107 /* If we are in cmd context and waiting for its cmd response
IanBenzMaxim 0:33d4e66780c0 108 * do not handle spawn async events as the global lock was already taken */
IanBenzMaxim 0:33d4e66780c0 109 if (FALSE == g_pCB->IsCmdRespWaited)
IanBenzMaxim 0:33d4e66780c0 110 {
IanBenzMaxim 0:33d4e66780c0 111 (void)_SlNonOsMainLoopTask();
IanBenzMaxim 0:33d4e66780c0 112 }
IanBenzMaxim 0:33d4e66780c0 113 #ifdef _SlSyncWaitLoopCallback
IanBenzMaxim 0:33d4e66780c0 114 if( (__NON_OS_SYNC_OBJ_SIGNAL_VALUE == WaitValue) && (timeOutRequest != NONOS_NO_WAIT) )
IanBenzMaxim 0:33d4e66780c0 115 {
IanBenzMaxim 0:33d4e66780c0 116 if (WaitValue == *pSyncObj)
IanBenzMaxim 0:33d4e66780c0 117 {
IanBenzMaxim 0:33d4e66780c0 118 *pSyncObj = SetValue;
IanBenzMaxim 0:33d4e66780c0 119 break;
IanBenzMaxim 0:33d4e66780c0 120 }
IanBenzMaxim 0:33d4e66780c0 121 _SlSyncWaitLoopCallback();
IanBenzMaxim 0:33d4e66780c0 122 }
IanBenzMaxim 0:33d4e66780c0 123 #endif
IanBenzMaxim 0:33d4e66780c0 124 }
IanBenzMaxim 0:33d4e66780c0 125
IanBenzMaxim 0:33d4e66780c0 126 if (0 == Timeout)
IanBenzMaxim 0:33d4e66780c0 127 {
IanBenzMaxim 0:33d4e66780c0 128 return NONOS_RET_ERR;
IanBenzMaxim 0:33d4e66780c0 129 }
IanBenzMaxim 0:33d4e66780c0 130 else
IanBenzMaxim 0:33d4e66780c0 131 {
IanBenzMaxim 0:33d4e66780c0 132 return NONOS_RET_OK;
IanBenzMaxim 0:33d4e66780c0 133 }
IanBenzMaxim 0:33d4e66780c0 134 }
IanBenzMaxim 0:33d4e66780c0 135
IanBenzMaxim 0:33d4e66780c0 136
IanBenzMaxim 0:33d4e66780c0 137 _SlNonOsRetVal_t _SlNonOsSpawn(_SlSpawnEntryFunc_t pEntry , void* pValue , _u32 flags)
IanBenzMaxim 0:33d4e66780c0 138 {
IanBenzMaxim 0:33d4e66780c0 139 _i8 i = 0;
IanBenzMaxim 0:33d4e66780c0 140
IanBenzMaxim 0:33d4e66780c0 141 (void)flags;
IanBenzMaxim 0:33d4e66780c0 142
IanBenzMaxim 0:33d4e66780c0 143 #ifndef SL_TINY_EXT
IanBenzMaxim 0:33d4e66780c0 144 for (i=0 ; i<NONOS_MAX_SPAWN_ENTRIES ; i++)
IanBenzMaxim 0:33d4e66780c0 145 #endif
IanBenzMaxim 0:33d4e66780c0 146 {
IanBenzMaxim 0:33d4e66780c0 147 _SlNonOsSpawnEntry_t* pE = &g__SlNonOsCB.SpawnEntries[i];
IanBenzMaxim 0:33d4e66780c0 148
IanBenzMaxim 0:33d4e66780c0 149 if (pE->IsAllocated == FALSE)
IanBenzMaxim 0:33d4e66780c0 150 {
IanBenzMaxim 0:33d4e66780c0 151 pE->pValue = pValue;
IanBenzMaxim 0:33d4e66780c0 152 pE->pEntry = pEntry;
IanBenzMaxim 0:33d4e66780c0 153 pE->IsAllocated = TRUE;
IanBenzMaxim 0:33d4e66780c0 154 #ifndef SL_TINY_EXT
IanBenzMaxim 0:33d4e66780c0 155 break;
IanBenzMaxim 0:33d4e66780c0 156 #endif
IanBenzMaxim 0:33d4e66780c0 157 }
IanBenzMaxim 0:33d4e66780c0 158 }
IanBenzMaxim 0:33d4e66780c0 159
IanBenzMaxim 0:33d4e66780c0 160
IanBenzMaxim 0:33d4e66780c0 161 return NONOS_RET_OK;
IanBenzMaxim 0:33d4e66780c0 162 }
IanBenzMaxim 0:33d4e66780c0 163
IanBenzMaxim 0:33d4e66780c0 164
IanBenzMaxim 0:33d4e66780c0 165 _SlNonOsRetVal_t _SlNonOsMainLoopTask(void)
IanBenzMaxim 0:33d4e66780c0 166 {
IanBenzMaxim 0:33d4e66780c0 167 _i8 i=0;
IanBenzMaxim 0:33d4e66780c0 168 void* pValue;
IanBenzMaxim 0:33d4e66780c0 169
IanBenzMaxim 0:33d4e66780c0 170 #ifndef SL_TINY_EXT
IanBenzMaxim 0:33d4e66780c0 171 for (i=0 ; i<NONOS_MAX_SPAWN_ENTRIES ; i++)
IanBenzMaxim 0:33d4e66780c0 172 #endif
IanBenzMaxim 0:33d4e66780c0 173 {
IanBenzMaxim 0:33d4e66780c0 174 _SlNonOsSpawnEntry_t* pE = &g__SlNonOsCB.SpawnEntries[i];
IanBenzMaxim 0:33d4e66780c0 175
IanBenzMaxim 0:33d4e66780c0 176
IanBenzMaxim 0:33d4e66780c0 177 if (pE->IsAllocated == TRUE)
IanBenzMaxim 0:33d4e66780c0 178 {
IanBenzMaxim 0:33d4e66780c0 179 _SlSpawnEntryFunc_t pF = pE->pEntry;
IanBenzMaxim 0:33d4e66780c0 180 pValue = pE->pValue;
IanBenzMaxim 0:33d4e66780c0 181
IanBenzMaxim 0:33d4e66780c0 182
IanBenzMaxim 0:33d4e66780c0 183 /* Clear the entry */
IanBenzMaxim 0:33d4e66780c0 184 pE->pEntry = NULL;
IanBenzMaxim 0:33d4e66780c0 185 pE->pValue = NULL;
IanBenzMaxim 0:33d4e66780c0 186 pE->IsAllocated = FALSE;
IanBenzMaxim 0:33d4e66780c0 187
IanBenzMaxim 0:33d4e66780c0 188 /* execute the spawn function */
IanBenzMaxim 0:33d4e66780c0 189 pF(pValue);
IanBenzMaxim 0:33d4e66780c0 190 }
IanBenzMaxim 0:33d4e66780c0 191 }
IanBenzMaxim 0:33d4e66780c0 192
IanBenzMaxim 0:33d4e66780c0 193 return NONOS_RET_OK;
IanBenzMaxim 0:33d4e66780c0 194 }
IanBenzMaxim 0:33d4e66780c0 195
IanBenzMaxim 0:33d4e66780c0 196
IanBenzMaxim 0:33d4e66780c0 197 #endif /*(SL_PLATFORM != SL_PLATFORM_NON_OS)*/