MAXREFDES143#: DeepCover Embedded Security in IoT Authenticated Sensing & Notification
Dependencies: MaximInterface mbed
The MAXREFDES143# is an Internet of Things (IoT) embedded security reference design, built to protect an industrial sensing node by means of authentication and notification to a web server. The hardware includes a peripheral module representing a protected sensor node monitoring operating temperature and remaining life of a filter (simulated through ambient light sensing) and an mbed shield representing a controller node responsible for monitoring one or more sensor nodes. The design is hierarchical with each controller node communicating data from connected sensor nodes to a web server that maintains a centralized log and dispatches notifications as necessary. The mbed shield contains a Wi-Fi module, a DS2465 coprocessor with 1-Wire® master function, an LCD, LEDs, and pushbuttons. The protected sensor node contains a DS28E15 authenticator, a DS7505 temperature sensor, and a MAX44009 light sensor. The mbed shield communicates to a web server by the onboard Wi-Fi module and to the protected sensor node with I2C and 1-Wire. The MAXREFDES143# is equipped with a standard shield connector for immediate testing using an mbed board such as the MAX32600MBED#. The simplicity of this design enables rapid integration into any star-topology IoT network requiring the heightened security with low overhead provided by the SHA-256 symmetric-key algorithm.
More information about the MAXREFDES143# is available on the Maxim Integrated website.
SensorNode.cpp@17:41be4896ed6d, 2016-07-21 (annotated)
- Committer:
- IanBenzMaxim
- Date:
- Thu Jul 21 11:06:13 2016 -0500
- Revision:
- 17:41be4896ed6d
- Parent:
- 14:0962f818bf7f
- Child:
- 18:6fbf7e7b6ab6
Fixed issue with LCD controller initialization on some boards due to power instability. Updated following downstream restructuring in OneWire library.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
IanBenzMaxim | 1:e1c7c1c636af | 1 | /******************************************************************************* |
IanBenzMaxim | 1:e1c7c1c636af | 2 | * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved. |
IanBenzMaxim | 1:e1c7c1c636af | 3 | * |
IanBenzMaxim | 1:e1c7c1c636af | 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
IanBenzMaxim | 1:e1c7c1c636af | 5 | * copy of this software and associated documentation files (the "Software"), |
IanBenzMaxim | 1:e1c7c1c636af | 6 | * to deal in the Software without restriction, including without limitation |
IanBenzMaxim | 1:e1c7c1c636af | 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
IanBenzMaxim | 1:e1c7c1c636af | 8 | * and/or sell copies of the Software, and to permit persons to whom the |
IanBenzMaxim | 1:e1c7c1c636af | 9 | * Software is furnished to do so, subject to the following conditions: |
IanBenzMaxim | 1:e1c7c1c636af | 10 | * |
IanBenzMaxim | 1:e1c7c1c636af | 11 | * The above copyright notice and this permission notice shall be included |
IanBenzMaxim | 1:e1c7c1c636af | 12 | * in all copies or substantial portions of the Software. |
IanBenzMaxim | 1:e1c7c1c636af | 13 | * |
IanBenzMaxim | 1:e1c7c1c636af | 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
IanBenzMaxim | 1:e1c7c1c636af | 15 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
IanBenzMaxim | 1:e1c7c1c636af | 16 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
IanBenzMaxim | 1:e1c7c1c636af | 17 | * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES |
IanBenzMaxim | 1:e1c7c1c636af | 18 | * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
IanBenzMaxim | 1:e1c7c1c636af | 19 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
IanBenzMaxim | 1:e1c7c1c636af | 20 | * OTHER DEALINGS IN THE SOFTWARE. |
IanBenzMaxim | 1:e1c7c1c636af | 21 | * |
IanBenzMaxim | 1:e1c7c1c636af | 22 | * Except as contained in this notice, the name of Maxim Integrated |
IanBenzMaxim | 1:e1c7c1c636af | 23 | * Products, Inc. shall not be used except as stated in the Maxim Integrated |
IanBenzMaxim | 1:e1c7c1c636af | 24 | * Products, Inc. Branding Policy. |
IanBenzMaxim | 1:e1c7c1c636af | 25 | * |
IanBenzMaxim | 1:e1c7c1c636af | 26 | * The mere transfer of this software does not imply any licenses |
IanBenzMaxim | 1:e1c7c1c636af | 27 | * of trade secrets, proprietary technology, copyrights, patents, |
IanBenzMaxim | 1:e1c7c1c636af | 28 | * trademarks, maskwork rights, or any other form of intellectual |
IanBenzMaxim | 1:e1c7c1c636af | 29 | * property whatsoever. Maxim Integrated Products, Inc. retains all |
IanBenzMaxim | 1:e1c7c1c636af | 30 | * ownership rights. |
IanBenzMaxim | 1:e1c7c1c636af | 31 | ******************************************************************************* |
IanBenzMaxim | 1:e1c7c1c636af | 32 | */ |
IanBenzMaxim | 1:e1c7c1c636af | 33 | |
IanBenzMaxim | 1:e1c7c1c636af | 34 | #include "SensorNode.hpp" |
IanBenzMaxim | 1:e1c7c1c636af | 35 | #include "common.hpp" |
IanBenzMaxim | 6:b6bafd0a7013 | 36 | #include "Masters/DS2465/DS2465.h" |
IanBenzMaxim | 17:41be4896ed6d | 37 | #include "RomId/RomCommands.h" |
IanBenzMaxim | 6:b6bafd0a7013 | 38 | #include "I2C.h" |
IanBenzMaxim | 1:e1c7c1c636af | 39 | |
IanBenzMaxim | 1:e1c7c1c636af | 40 | #ifdef TARGET_MAX32600 |
IanBenzMaxim | 1:e1c7c1c636af | 41 | #include "max32600.h" |
IanBenzMaxim | 1:e1c7c1c636af | 42 | #include "clkman_regs.h" |
IanBenzMaxim | 1:e1c7c1c636af | 43 | #include "tpu_regs.h" |
IanBenzMaxim | 1:e1c7c1c636af | 44 | #else |
IanBenzMaxim | 1:e1c7c1c636af | 45 | #include <cstdlib> |
IanBenzMaxim | 1:e1c7c1c636af | 46 | #endif |
IanBenzMaxim | 1:e1c7c1c636af | 47 | |
IanBenzMaxim | 8:594529956266 | 48 | using namespace OneWire; |
IanBenzMaxim | 17:41be4896ed6d | 49 | using namespace OneWire::RomCommands; |
IanBenzMaxim | 6:b6bafd0a7013 | 50 | |
IanBenzMaxim | 1:e1c7c1c636af | 51 | bool SensorNode::rngInitialized = false; |
IanBenzMaxim | 1:e1c7c1c636af | 52 | |
IanBenzMaxim | 1:e1c7c1c636af | 53 | void SensorNode::initializeRng() |
IanBenzMaxim | 1:e1c7c1c636af | 54 | { |
IanBenzMaxim | 1:e1c7c1c636af | 55 | #ifdef TARGET_MAX32600 |
IanBenzMaxim | 1:e1c7c1c636af | 56 | MXC_CLKMAN->clk_config |= (MXC_F_CLKMAN_CLK_CONFIG_CRYPTO_ENABLE | MXC_F_CLKMAN_CLK_CONFIG_CRYPTO_RESET_N); // Enable crypto oscillator |
IanBenzMaxim | 1:e1c7c1c636af | 57 | while ((MXC_CLKMAN->intfl & MXC_F_CLKMAN_INTFL_CRYPTO_STABLE) != MXC_F_CLKMAN_INTFL_CRYPTO_STABLE) ; // Wait for crypto oscillator stability |
IanBenzMaxim | 1:e1c7c1c636af | 58 | MXC_CLKMAN->clk_ctrl |= MXC_F_CLKMAN_CLK_CTRL_CRYPTO_GATE_N; // Disable crypto clock gating |
IanBenzMaxim | 1:e1c7c1c636af | 59 | MXC_CLKMAN->crypt_clk_ctrl_2_prng = MXC_CLKMAN->clk_ctrl_10_prng = 1; // Set PRNG clock to crypto clock |
IanBenzMaxim | 1:e1c7c1c636af | 60 | MXC_CLKMAN->clk_gate_ctrl2 |= (1 << MXC_F_CLKMAN_CLK_GATE_CTRL2_TPU_CLK_GATER_POS); // Use dynamic clock gating |
IanBenzMaxim | 1:e1c7c1c636af | 61 | #endif |
IanBenzMaxim | 1:e1c7c1c636af | 62 | } |
IanBenzMaxim | 1:e1c7c1c636af | 63 | |
IanBenzMaxim | 6:b6bafd0a7013 | 64 | SensorNode::SensorNode(mbed::I2C & i2c, uint8_t ds7505_i2c_addr, uint8_t max44009_i2c_addr, DS2465 & ds2465) |
IanBenzMaxim | 9:bc3d211d75ce | 65 | : m_initialLux(1),ds2465(ds2465), selector(ds2465), ds28e15_22_25(selector), ds7505(i2c, ds7505_i2c_addr), max44009(i2c, max44009_i2c_addr) |
IanBenzMaxim | 1:e1c7c1c636af | 66 | { |
IanBenzMaxim | 1:e1c7c1c636af | 67 | if (!rngInitialized) |
IanBenzMaxim | 1:e1c7c1c636af | 68 | { |
IanBenzMaxim | 1:e1c7c1c636af | 69 | initializeRng(); |
IanBenzMaxim | 1:e1c7c1c636af | 70 | rngInitialized = true; |
IanBenzMaxim | 1:e1c7c1c636af | 71 | } |
IanBenzMaxim | 1:e1c7c1c636af | 72 | } |
IanBenzMaxim | 1:e1c7c1c636af | 73 | |
IanBenzMaxim | 1:e1c7c1c636af | 74 | bool SensorNode::initializeSensors() |
IanBenzMaxim | 1:e1c7c1c636af | 75 | { |
IanBenzMaxim | 1:e1c7c1c636af | 76 | return (max44009.read_current_lux(m_initialLux) == MAX44009::Success); |
IanBenzMaxim | 1:e1c7c1c636af | 77 | } |
IanBenzMaxim | 1:e1c7c1c636af | 78 | |
IanBenzMaxim | 1:e1c7c1c636af | 79 | bool SensorNode::setSecret() |
IanBenzMaxim | 1:e1c7c1c636af | 80 | { |
IanBenzMaxim | 1:e1c7c1c636af | 81 | DS28E15_22_25::Scratchpad scratchpad; |
IanBenzMaxim | 1:e1c7c1c636af | 82 | DS28E15_22_25::Page pageData; |
IanBenzMaxim | 1:e1c7c1c636af | 83 | |
IanBenzMaxim | 1:e1c7c1c636af | 84 | // Create constant partial secret |
IanBenzMaxim | 1:e1c7c1c636af | 85 | std::memset(scratchpad, defaultPaddingByte, scratchpad.length); |
IanBenzMaxim | 1:e1c7c1c636af | 86 | // Read page data |
IanBenzMaxim | 11:aeaa77b488c0 | 87 | bool result = (ds2465.readMemory(DS2465::UserMemoryPage0, pageData, pageData.length, false) == OneWireMaster::Success); |
IanBenzMaxim | 1:e1c7c1c636af | 88 | // Calculate secret |
IanBenzMaxim | 1:e1c7c1c636af | 89 | if (result) |
IanBenzMaxim | 1:e1c7c1c636af | 90 | { |
IanBenzMaxim | 14:0962f818bf7f | 91 | result = (DS28E15_22_25::computeNextSecret(ds2465, pageData, authData.pageNum, scratchpad, ds28e15_22_25.romId(), ds28e15_22_25.manId()) == ISha256MacCoproc::Success); |
IanBenzMaxim | 1:e1c7c1c636af | 92 | } |
IanBenzMaxim | 1:e1c7c1c636af | 93 | return result; |
IanBenzMaxim | 1:e1c7c1c636af | 94 | } |
IanBenzMaxim | 1:e1c7c1c636af | 95 | |
IanBenzMaxim | 1:e1c7c1c636af | 96 | bool SensorNode::checkProvisioned(bool & provisioned) |
IanBenzMaxim | 1:e1c7c1c636af | 97 | { |
IanBenzMaxim | 1:e1c7c1c636af | 98 | DS28E15_22_25::BlockProtection protectionStatus; |
IanBenzMaxim | 1:e1c7c1c636af | 99 | bool result; |
IanBenzMaxim | 1:e1c7c1c636af | 100 | |
IanBenzMaxim | 9:bc3d211d75ce | 101 | |
IanBenzMaxim | 9:bc3d211d75ce | 102 | result = (ds28e15_22_25.readBlockProtection(0, protectionStatus) == OneWireSlave::Success); |
IanBenzMaxim | 1:e1c7c1c636af | 103 | if (result) |
IanBenzMaxim | 1:e1c7c1c636af | 104 | { |
IanBenzMaxim | 1:e1c7c1c636af | 105 | if (!protectionStatus.noProtection()) |
IanBenzMaxim | 1:e1c7c1c636af | 106 | { |
IanBenzMaxim | 9:bc3d211d75ce | 107 | result = (ds28e15_22_25.readSegment(authData.pageNum, authData.segmentNum, authData.segment) == OneWireSlave::Success); |
IanBenzMaxim | 1:e1c7c1c636af | 108 | if (result) |
IanBenzMaxim | 1:e1c7c1c636af | 109 | provisioned = true; |
IanBenzMaxim | 1:e1c7c1c636af | 110 | } |
IanBenzMaxim | 1:e1c7c1c636af | 111 | else |
IanBenzMaxim | 1:e1c7c1c636af | 112 | { |
IanBenzMaxim | 1:e1c7c1c636af | 113 | provisioned = false; |
IanBenzMaxim | 1:e1c7c1c636af | 114 | } |
IanBenzMaxim | 1:e1c7c1c636af | 115 | } |
IanBenzMaxim | 1:e1c7c1c636af | 116 | return result; |
IanBenzMaxim | 1:e1c7c1c636af | 117 | } |
IanBenzMaxim | 1:e1c7c1c636af | 118 | |
IanBenzMaxim | 1:e1c7c1c636af | 119 | bool SensorNode::checkAuthentic(unsigned int userEntropy) |
IanBenzMaxim | 1:e1c7c1c636af | 120 | { |
IanBenzMaxim | 1:e1c7c1c636af | 121 | DS28E15_22_25::Scratchpad challenge; |
IanBenzMaxim | 1:e1c7c1c636af | 122 | DS28E15_22_25::Page pageData; |
IanBenzMaxim | 1:e1c7c1c636af | 123 | |
IanBenzMaxim | 1:e1c7c1c636af | 124 | // Read page data |
IanBenzMaxim | 1:e1c7c1c636af | 125 | if (ds28e15_22_25.readPage(authData.pageNum, pageData, false) != OneWireSlave::Success) |
IanBenzMaxim | 1:e1c7c1c636af | 126 | return false; |
IanBenzMaxim | 1:e1c7c1c636af | 127 | |
IanBenzMaxim | 1:e1c7c1c636af | 128 | // Create random challenge |
IanBenzMaxim | 1:e1c7c1c636af | 129 | // Use hardare RNG on MAX32600 |
IanBenzMaxim | 1:e1c7c1c636af | 130 | #ifdef TARGET_MAX32600 |
IanBenzMaxim | 1:e1c7c1c636af | 131 | MXC_TPU->prng_user_entropy = userEntropy; |
IanBenzMaxim | 1:e1c7c1c636af | 132 | #else |
IanBenzMaxim | 1:e1c7c1c636af | 133 | std::srand(userEntropy); |
IanBenzMaxim | 1:e1c7c1c636af | 134 | #endif |
IanBenzMaxim | 6:b6bafd0a7013 | 135 | for (size_t i = 0; i < challenge.length; i++) |
IanBenzMaxim | 1:e1c7c1c636af | 136 | { |
IanBenzMaxim | 1:e1c7c1c636af | 137 | #ifdef TARGET_MAX32600 |
IanBenzMaxim | 1:e1c7c1c636af | 138 | challenge[i] = MXC_TPU->prng_rnd_num; |
IanBenzMaxim | 1:e1c7c1c636af | 139 | #else |
IanBenzMaxim | 1:e1c7c1c636af | 140 | challenge[i] = std::rand(); |
IanBenzMaxim | 1:e1c7c1c636af | 141 | #endif |
IanBenzMaxim | 1:e1c7c1c636af | 142 | } |
IanBenzMaxim | 1:e1c7c1c636af | 143 | |
IanBenzMaxim | 1:e1c7c1c636af | 144 | // Write challenge to scratchpad |
IanBenzMaxim | 1:e1c7c1c636af | 145 | if (ds28e15_22_25.writeScratchpad(challenge) != OneWireSlave::Success) |
IanBenzMaxim | 1:e1c7c1c636af | 146 | return false; |
IanBenzMaxim | 1:e1c7c1c636af | 147 | // Have device compute MAC |
IanBenzMaxim | 1:e1c7c1c636af | 148 | DS28E15_22_25::Mac nodeMac; |
IanBenzMaxim | 1:e1c7c1c636af | 149 | if (ds28e15_22_25.computeReadPageMac(0, false, nodeMac) != OneWireSlave::Success) |
IanBenzMaxim | 1:e1c7c1c636af | 150 | return false; |
IanBenzMaxim | 1:e1c7c1c636af | 151 | // Compute expected MAC |
IanBenzMaxim | 1:e1c7c1c636af | 152 | DS28E15_22_25::Mac controllerMac; |
IanBenzMaxim | 14:0962f818bf7f | 153 | if (DS28E15_22_25::computeAuthMac(ds2465, pageData, authData.pageNum, challenge, ds28e15_22_25.romId(), ds28e15_22_25.manId(), controllerMac) != ISha256MacCoproc::Success) |
IanBenzMaxim | 1:e1c7c1c636af | 154 | return false; |
IanBenzMaxim | 1:e1c7c1c636af | 155 | // Check if authentic |
IanBenzMaxim | 1:e1c7c1c636af | 156 | return (nodeMac == controllerMac); |
IanBenzMaxim | 1:e1c7c1c636af | 157 | } |
IanBenzMaxim | 1:e1c7c1c636af | 158 | |
IanBenzMaxim | 1:e1c7c1c636af | 159 | bool SensorNode::readSensorData(SensorData & sensorData) |
IanBenzMaxim | 1:e1c7c1c636af | 160 | { |
IanBenzMaxim | 1:e1c7c1c636af | 161 | bool result; |
IanBenzMaxim | 1:e1c7c1c636af | 162 | std::int8_t temp; |
IanBenzMaxim | 1:e1c7c1c636af | 163 | |
IanBenzMaxim | 1:e1c7c1c636af | 164 | // Read temperature sensor |
IanBenzMaxim | 1:e1c7c1c636af | 165 | result = (ds7505.read_current_temp(temp) == DS7505::Success); |
IanBenzMaxim | 1:e1c7c1c636af | 166 | |
IanBenzMaxim | 1:e1c7c1c636af | 167 | if (result) |
IanBenzMaxim | 1:e1c7c1c636af | 168 | { |
IanBenzMaxim | 1:e1c7c1c636af | 169 | sensorData.temp = temp; |
IanBenzMaxim | 1:e1c7c1c636af | 170 | |
IanBenzMaxim | 1:e1c7c1c636af | 171 | // Read light sensor |
IanBenzMaxim | 1:e1c7c1c636af | 172 | double currentLux; |
IanBenzMaxim | 1:e1c7c1c636af | 173 | result = (max44009.read_current_lux(currentLux) == MAX44009::Success); |
IanBenzMaxim | 1:e1c7c1c636af | 174 | if (result) |
IanBenzMaxim | 1:e1c7c1c636af | 175 | { |
IanBenzMaxim | 1:e1c7c1c636af | 176 | // Convert lux to remaining filter life |
IanBenzMaxim | 1:e1c7c1c636af | 177 | sensorData.filterLife = (unsigned int)((currentLux / m_initialLux) * 100); |
IanBenzMaxim | 1:e1c7c1c636af | 178 | } |
IanBenzMaxim | 1:e1c7c1c636af | 179 | } |
IanBenzMaxim | 1:e1c7c1c636af | 180 | |
IanBenzMaxim | 1:e1c7c1c636af | 181 | return result; |
IanBenzMaxim | 1:e1c7c1c636af | 182 | } |
IanBenzMaxim | 1:e1c7c1c636af | 183 | |
IanBenzMaxim | 1:e1c7c1c636af | 184 | bool SensorNode::checkAndWriteAuthData(SensorData & sensorData) |
IanBenzMaxim | 1:e1c7c1c636af | 185 | { |
IanBenzMaxim | 1:e1c7c1c636af | 186 | bool result = true; |
IanBenzMaxim | 1:e1c7c1c636af | 187 | |
IanBenzMaxim | 1:e1c7c1c636af | 188 | if (sensorData.filterLife > authData.filterLife) |
IanBenzMaxim | 1:e1c7c1c636af | 189 | { |
IanBenzMaxim | 1:e1c7c1c636af | 190 | sensorData.filterLife = authData.filterLife; |
IanBenzMaxim | 1:e1c7c1c636af | 191 | } |
IanBenzMaxim | 1:e1c7c1c636af | 192 | else if (sensorData.filterLife < authData.filterLife) |
IanBenzMaxim | 1:e1c7c1c636af | 193 | { |
IanBenzMaxim | 1:e1c7c1c636af | 194 | AuthData oldAuthData(authData); |
IanBenzMaxim | 1:e1c7c1c636af | 195 | authData.filterLife = sensorData.filterLife; |
IanBenzMaxim | 1:e1c7c1c636af | 196 | // Write new filter life to DS28E15 |
IanBenzMaxim | 9:bc3d211d75ce | 197 | result = (ds28e15_22_25.writeAuthSegment(ds2465, authData.pageNum, authData.segmentNum, authData.segment, oldAuthData.segment, false) == OneWireSlave::Success); |
IanBenzMaxim | 1:e1c7c1c636af | 198 | } |
IanBenzMaxim | 1:e1c7c1c636af | 199 | |
IanBenzMaxim | 1:e1c7c1c636af | 200 | return result; |
IanBenzMaxim | 1:e1c7c1c636af | 201 | } |
IanBenzMaxim | 1:e1c7c1c636af | 202 | |
IanBenzMaxim | 1:e1c7c1c636af | 203 | SensorNode::State SensorNode::detect(unsigned int userEntropy) |
IanBenzMaxim | 1:e1c7c1c636af | 204 | { |
IanBenzMaxim | 1:e1c7c1c636af | 205 | bool provisioned; |
IanBenzMaxim | 1:e1c7c1c636af | 206 | |
IanBenzMaxim | 7:e24f0b29f1f7 | 207 | ds2465.OWSetSpeed(DS2465::OverdriveSpeed); |
IanBenzMaxim | 1:e1c7c1c636af | 208 | |
IanBenzMaxim | 14:0962f818bf7f | 209 | RomId romId; |
IanBenzMaxim | 17:41be4896ed6d | 210 | if (OWReadRom(ds2465, romId) != OneWireMaster::Success) |
IanBenzMaxim | 1:e1c7c1c636af | 211 | return UnableToCommunicate; |
IanBenzMaxim | 14:0962f818bf7f | 212 | ds28e15_22_25.setRomId(romId); |
IanBenzMaxim | 1:e1c7c1c636af | 213 | |
IanBenzMaxim | 1:e1c7c1c636af | 214 | if (!checkProvisioned(provisioned)) |
IanBenzMaxim | 1:e1c7c1c636af | 215 | return UnableToCommunicate; |
IanBenzMaxim | 1:e1c7c1c636af | 216 | |
IanBenzMaxim | 1:e1c7c1c636af | 217 | if (!provisioned) |
IanBenzMaxim | 1:e1c7c1c636af | 218 | return NotProvisioned; |
IanBenzMaxim | 1:e1c7c1c636af | 219 | |
IanBenzMaxim | 1:e1c7c1c636af | 220 | if (!setSecret()) |
IanBenzMaxim | 1:e1c7c1c636af | 221 | return UnableToCommunicate; |
IanBenzMaxim | 1:e1c7c1c636af | 222 | |
IanBenzMaxim | 1:e1c7c1c636af | 223 | if (!checkAuthentic(userEntropy)) |
IanBenzMaxim | 1:e1c7c1c636af | 224 | return NotAuthentic; |
IanBenzMaxim | 1:e1c7c1c636af | 225 | |
IanBenzMaxim | 1:e1c7c1c636af | 226 | if (!initializeSensors()) |
IanBenzMaxim | 1:e1c7c1c636af | 227 | return UnableToCommunicate; |
IanBenzMaxim | 1:e1c7c1c636af | 228 | |
IanBenzMaxim | 1:e1c7c1c636af | 229 | return Authentic; |
IanBenzMaxim | 1:e1c7c1c636af | 230 | } |
IanBenzMaxim | 1:e1c7c1c636af | 231 | |
IanBenzMaxim | 1:e1c7c1c636af | 232 | SensorNode::State SensorNode::authenticatedReadSensorData(unsigned int userEntropy, SensorData & sensorData) |
IanBenzMaxim | 1:e1c7c1c636af | 233 | { |
IanBenzMaxim | 7:e24f0b29f1f7 | 234 | ds2465.OWSetSpeed(DS2465::OverdriveSpeed); |
IanBenzMaxim | 1:e1c7c1c636af | 235 | |
IanBenzMaxim | 1:e1c7c1c636af | 236 | if (!setSecret()) |
IanBenzMaxim | 1:e1c7c1c636af | 237 | return UnableToCommunicate; |
IanBenzMaxim | 1:e1c7c1c636af | 238 | |
IanBenzMaxim | 1:e1c7c1c636af | 239 | if (!checkAuthentic(userEntropy)) |
IanBenzMaxim | 1:e1c7c1c636af | 240 | return NotAuthentic; |
IanBenzMaxim | 1:e1c7c1c636af | 241 | |
IanBenzMaxim | 1:e1c7c1c636af | 242 | if (!readSensorData(sensorData)) |
IanBenzMaxim | 1:e1c7c1c636af | 243 | return UnableToCommunicate; |
IanBenzMaxim | 1:e1c7c1c636af | 244 | |
IanBenzMaxim | 1:e1c7c1c636af | 245 | if (!checkAndWriteAuthData(sensorData)) |
IanBenzMaxim | 1:e1c7c1c636af | 246 | return NotAuthentic; |
IanBenzMaxim | 1:e1c7c1c636af | 247 | |
IanBenzMaxim | 1:e1c7c1c636af | 248 | return Authentic; |
IanBenzMaxim | 1:e1c7c1c636af | 249 | } |