end node on synchronous star LoRa network.
Dependencies: SX127x sx12xx_hal TSL2561
radio chip selection
Radio chip driver is not included, allowing choice of radio device.
If you're using SX1272 or SX1276, then import sx127x driver into your program.
if you're using SX1261 or SX1262, then import sx126x driver into your program.
if you're using SX1280, then import sx1280 driver into your program.
If you're using NAmote72 or Murata discovery, then you must import only sx127x driver.
This project for use with LoRaWAN_singlechannel_gateway project.
Alternately gateway running on raspberry pi can be used as gateway.
LoRaWAN on single radio channel
Network description is at gateway project page. Synchronous star network.
Hardware Support
This project supports SX1276 and SX1272, sx126x kit, sx126x shield, and sx128x 2.4GHz. The ST board B-L072Z-LRWAN1 is also supported (TypeABZ module). When B-L072Z-LRWAN1
target is selected, TARGET_DISCO_L072CZ_LRWAN1
is defined by tools, allowing correct radio driver configuration for this platform. Alternately, any mbed board that can use LoRa radio shield board should work, but NUCLEO boards are tested.
End-node Unique ID
DevEUI is created from CPU serial number. AppEUI and AppKey are declared as software constants.
End-node Configuration
Data rate definition LORAMAC_DEFAULT_DATARATE
configured in LoRaMac-definitions.h
. See gateway project page for configuration of gateway.
LoRaWAN addressing is configured in Comissioning.h
; only OTA mode is functional.
Header file board/lora_config.h
, selects application layer options (i.e. sensors) to be compiled in.
Serial Interface
Serial port operates at 115200bps.
Application layer single_us915_main.cpp
User button triggers uplink (i.e. blue button on nucleo board), or jumper enables continuously sends repeated uplink packets. The MAC layer holds each uplink request until the allocated timeslot.
command | arguments | description |
---|---|---|
? | - | print available commands |
. (period) | - | print status (DevEUI, DevAddr, etc) |
ul | length integer | set payload length of test uplink packets |
sensor demo
Selected grove sensors may be plugged into SX1272 shield.
To enable, edit lora_config.h
to define SENSORS
.
Sensor connections on SX1272MB2xAS:
D8 D9: button | RX TX: (unused) | A3 A4: Rotary Angle Sensor |
D6 D7: RGB LED | SCL SDA: digital light sensor | A1 A2: Rotary Angle Sensor |
Digital input pin, state reported via uplink: PC8
Digital output pin, controlled via downlink: PC6
PWM out: PB_10
Jumper enables auto-repeated transmit: PC10
and PC12
on NUCLEO board, located on end of morpho headers nearby JP4.
mac/LoRaMacCrypto.cpp@34:9c8966cd66a2, 2020-07-10 (annotated)
- Committer:
- Wayne Roberts
- Date:
- Fri Jul 10 11:12:59 2020 -0700
- Revision:
- 34:9c8966cd66a2
- Parent:
- 29:ad409c68c0a6
update to using mbed-6
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Wayne Roberts |
34:9c8966cd66a2 | 1 | /* */ |
dudmuck | 0:8f0d0ae0a077 | 2 | |
dudmuck | 0:8f0d0ae0a077 | 3 | #include <stdlib.h> |
dudmuck | 0:8f0d0ae0a077 | 4 | #include <stdint.h> |
dudmuck | 0:8f0d0ae0a077 | 5 | #include "utilities.h" |
dudmuck | 0:8f0d0ae0a077 | 6 | |
Wayne Roberts |
34:9c8966cd66a2 | 7 | #include "cmac.h" |
Wayne Roberts |
34:9c8966cd66a2 | 8 | #include "aes.h" |
dudmuck | 0:8f0d0ae0a077 | 9 | |
dudmuck | 0:8f0d0ae0a077 | 10 | #include "LoRaMacCrypto.h" |
dudmuck | 0:8f0d0ae0a077 | 11 | |
dudmuck | 0:8f0d0ae0a077 | 12 | /*! |
dudmuck | 0:8f0d0ae0a077 | 13 | * CMAC/AES Message Integrity Code (MIC) Block B0 size |
dudmuck | 0:8f0d0ae0a077 | 14 | */ |
dudmuck | 0:8f0d0ae0a077 | 15 | #define LORAMAC_MIC_BLOCK_B0_SIZE 16 |
dudmuck | 0:8f0d0ae0a077 | 16 | |
dudmuck | 0:8f0d0ae0a077 | 17 | /*! |
dudmuck | 0:8f0d0ae0a077 | 18 | * MIC field computation initial data |
dudmuck | 0:8f0d0ae0a077 | 19 | */ |
dudmuck | 0:8f0d0ae0a077 | 20 | static uint8_t MicBlockB0[] = { 0x49, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
dudmuck | 0:8f0d0ae0a077 | 21 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 |
dudmuck | 0:8f0d0ae0a077 | 22 | }; |
dudmuck | 0:8f0d0ae0a077 | 23 | |
dudmuck | 0:8f0d0ae0a077 | 24 | /*! |
dudmuck | 0:8f0d0ae0a077 | 25 | * Contains the computed MIC field. |
dudmuck | 0:8f0d0ae0a077 | 26 | * |
dudmuck | 0:8f0d0ae0a077 | 27 | * \remark Only the 4 first bytes are used |
dudmuck | 0:8f0d0ae0a077 | 28 | */ |
dudmuck | 0:8f0d0ae0a077 | 29 | static uint8_t Mic[16]; |
dudmuck | 0:8f0d0ae0a077 | 30 | |
dudmuck | 0:8f0d0ae0a077 | 31 | /*! |
dudmuck | 0:8f0d0ae0a077 | 32 | * Encryption aBlock and sBlock |
dudmuck | 0:8f0d0ae0a077 | 33 | */ |
dudmuck | 0:8f0d0ae0a077 | 34 | static uint8_t aBlock[] = { 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
dudmuck | 0:8f0d0ae0a077 | 35 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 |
dudmuck | 0:8f0d0ae0a077 | 36 | }; |
dudmuck | 0:8f0d0ae0a077 | 37 | static uint8_t sBlock[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
dudmuck | 0:8f0d0ae0a077 | 38 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 |
dudmuck | 0:8f0d0ae0a077 | 39 | }; |
dudmuck | 0:8f0d0ae0a077 | 40 | |
Wayne Roberts |
34:9c8966cd66a2 | 41 | static mbedtls_cipher_context_t ctx; |
dudmuck | 0:8f0d0ae0a077 | 42 | |
dudmuck | 0:8f0d0ae0a077 | 43 | /*! |
dudmuck | 0:8f0d0ae0a077 | 44 | * \brief Computes the LoRaMAC frame MIC field |
dudmuck | 0:8f0d0ae0a077 | 45 | * |
dudmuck | 0:8f0d0ae0a077 | 46 | * \param [IN] buffer Data buffer |
dudmuck | 0:8f0d0ae0a077 | 47 | * \param [IN] size Data buffer size |
dudmuck | 0:8f0d0ae0a077 | 48 | * \param [IN] key AES key to be used |
dudmuck | 0:8f0d0ae0a077 | 49 | * \param [IN] address Frame address |
dudmuck | 0:8f0d0ae0a077 | 50 | * \param [IN] dir Frame direction [0: uplink, 1: downlink] |
dudmuck | 0:8f0d0ae0a077 | 51 | * \param [IN] sequenceCounter Frame sequence counter |
dudmuck | 0:8f0d0ae0a077 | 52 | * \param [OUT] mic Computed MIC field |
dudmuck | 0:8f0d0ae0a077 | 53 | */ |
Wayne Roberts |
34:9c8966cd66a2 | 54 | int LoRaMacComputeMic( const uint8_t *buffer, uint16_t size, const uint8_t *key, uint32_t address, uint8_t dir, uint32_t sequenceCounter, uint32_t *mic ) |
dudmuck | 0:8f0d0ae0a077 | 55 | { |
Wayne Roberts |
34:9c8966cd66a2 | 56 | //tls_printf("LoRaMacComputeMic:\r\n"); |
dudmuck | 0:8f0d0ae0a077 | 57 | MicBlockB0[5] = dir; |
dudmuck | 0:8f0d0ae0a077 | 58 | |
dudmuck | 0:8f0d0ae0a077 | 59 | MicBlockB0[6] = ( address ) & 0xFF; |
dudmuck | 0:8f0d0ae0a077 | 60 | MicBlockB0[7] = ( address >> 8 ) & 0xFF; |
dudmuck | 0:8f0d0ae0a077 | 61 | MicBlockB0[8] = ( address >> 16 ) & 0xFF; |
dudmuck | 0:8f0d0ae0a077 | 62 | MicBlockB0[9] = ( address >> 24 ) & 0xFF; |
dudmuck | 0:8f0d0ae0a077 | 63 | |
dudmuck | 0:8f0d0ae0a077 | 64 | MicBlockB0[10] = ( sequenceCounter ) & 0xFF; |
dudmuck | 0:8f0d0ae0a077 | 65 | MicBlockB0[11] = ( sequenceCounter >> 8 ) & 0xFF; |
dudmuck | 0:8f0d0ae0a077 | 66 | MicBlockB0[12] = ( sequenceCounter >> 16 ) & 0xFF; |
dudmuck | 0:8f0d0ae0a077 | 67 | MicBlockB0[13] = ( sequenceCounter >> 24 ) & 0xFF; |
dudmuck | 0:8f0d0ae0a077 | 68 | |
dudmuck | 0:8f0d0ae0a077 | 69 | MicBlockB0[15] = size & 0xFF; |
dudmuck | 0:8f0d0ae0a077 | 70 | |
Wayne Roberts |
34:9c8966cd66a2 | 71 | if (mbedtls_cipher_cmac_starts(&ctx, key, 128)) |
Wayne Roberts |
34:9c8966cd66a2 | 72 | return -1; |
Wayne Roberts |
34:9c8966cd66a2 | 73 | |
Wayne Roberts |
34:9c8966cd66a2 | 74 | mbedtls_cipher_cmac_update(&ctx, MicBlockB0, LORAMAC_MIC_BLOCK_B0_SIZE); |
Wayne Roberts |
34:9c8966cd66a2 | 75 | |
Wayne Roberts |
34:9c8966cd66a2 | 76 | mbedtls_cipher_cmac_update(&ctx, buffer, size & 0xff); |
Wayne Roberts |
34:9c8966cd66a2 | 77 | |
Wayne Roberts |
34:9c8966cd66a2 | 78 | mbedtls_cipher_cmac_finish(&ctx, Mic); |
dudmuck | 0:8f0d0ae0a077 | 79 | *mic = ( uint32_t )( ( uint32_t )Mic[3] << 24 | ( uint32_t )Mic[2] << 16 | ( uint32_t )Mic[1] << 8 | ( uint32_t )Mic[0] ); |
Wayne Roberts |
34:9c8966cd66a2 | 80 | return 0; |
dudmuck | 0:8f0d0ae0a077 | 81 | } |
dudmuck | 0:8f0d0ae0a077 | 82 | |
dudmuck | 0:8f0d0ae0a077 | 83 | void LoRaMacPayloadEncrypt( const uint8_t *buffer, uint16_t size, const uint8_t *key, uint32_t address, uint8_t dir, uint32_t sequenceCounter, uint8_t *encBuffer ) |
dudmuck | 0:8f0d0ae0a077 | 84 | { |
Wayne Roberts |
34:9c8966cd66a2 | 85 | mbedtls_aes_context actx; |
dudmuck | 0:8f0d0ae0a077 | 86 | uint16_t i; |
dudmuck | 0:8f0d0ae0a077 | 87 | uint8_t bufferIndex = 0; |
dudmuck | 0:8f0d0ae0a077 | 88 | uint16_t ctr = 1; |
dudmuck | 0:8f0d0ae0a077 | 89 | |
Wayne Roberts |
34:9c8966cd66a2 | 90 | mbedtls_aes_init(&actx); |
Wayne Roberts |
34:9c8966cd66a2 | 91 | mbedtls_aes_setkey_enc(&actx, key, 128); |
dudmuck | 0:8f0d0ae0a077 | 92 | |
dudmuck | 0:8f0d0ae0a077 | 93 | aBlock[5] = dir; |
dudmuck | 0:8f0d0ae0a077 | 94 | |
dudmuck | 0:8f0d0ae0a077 | 95 | aBlock[6] = ( address ) & 0xFF; |
dudmuck | 0:8f0d0ae0a077 | 96 | aBlock[7] = ( address >> 8 ) & 0xFF; |
dudmuck | 0:8f0d0ae0a077 | 97 | aBlock[8] = ( address >> 16 ) & 0xFF; |
dudmuck | 0:8f0d0ae0a077 | 98 | aBlock[9] = ( address >> 24 ) & 0xFF; |
dudmuck | 0:8f0d0ae0a077 | 99 | |
dudmuck | 0:8f0d0ae0a077 | 100 | aBlock[10] = ( sequenceCounter ) & 0xFF; |
dudmuck | 0:8f0d0ae0a077 | 101 | aBlock[11] = ( sequenceCounter >> 8 ) & 0xFF; |
dudmuck | 0:8f0d0ae0a077 | 102 | aBlock[12] = ( sequenceCounter >> 16 ) & 0xFF; |
dudmuck | 0:8f0d0ae0a077 | 103 | aBlock[13] = ( sequenceCounter >> 24 ) & 0xFF; |
dudmuck | 0:8f0d0ae0a077 | 104 | |
dudmuck | 0:8f0d0ae0a077 | 105 | while( size >= 16 ) |
dudmuck | 0:8f0d0ae0a077 | 106 | { |
dudmuck | 0:8f0d0ae0a077 | 107 | aBlock[15] = ( ( ctr ) & 0xFF ); |
dudmuck | 0:8f0d0ae0a077 | 108 | ctr++; |
Wayne Roberts |
34:9c8966cd66a2 | 109 | mbedtls_aes_encrypt(&actx, aBlock, sBlock); |
dudmuck | 0:8f0d0ae0a077 | 110 | for( i = 0; i < 16; i++ ) |
dudmuck | 0:8f0d0ae0a077 | 111 | { |
dudmuck | 0:8f0d0ae0a077 | 112 | encBuffer[bufferIndex + i] = buffer[bufferIndex + i] ^ sBlock[i]; |
dudmuck | 0:8f0d0ae0a077 | 113 | } |
dudmuck | 0:8f0d0ae0a077 | 114 | size -= 16; |
dudmuck | 0:8f0d0ae0a077 | 115 | bufferIndex += 16; |
dudmuck | 0:8f0d0ae0a077 | 116 | } |
dudmuck | 0:8f0d0ae0a077 | 117 | |
Wayne Roberts |
34:9c8966cd66a2 | 118 | if (size > 0) |
dudmuck | 0:8f0d0ae0a077 | 119 | { |
dudmuck | 0:8f0d0ae0a077 | 120 | aBlock[15] = ( ( ctr ) & 0xFF ); |
Wayne Roberts |
34:9c8966cd66a2 | 121 | mbedtls_aes_encrypt(&actx, aBlock, sBlock); |
dudmuck | 0:8f0d0ae0a077 | 122 | for( i = 0; i < size; i++ ) |
dudmuck | 0:8f0d0ae0a077 | 123 | { |
dudmuck | 0:8f0d0ae0a077 | 124 | encBuffer[bufferIndex + i] = buffer[bufferIndex + i] ^ sBlock[i]; |
dudmuck | 0:8f0d0ae0a077 | 125 | } |
dudmuck | 0:8f0d0ae0a077 | 126 | } |
Wayne Roberts |
34:9c8966cd66a2 | 127 | |
Wayne Roberts |
34:9c8966cd66a2 | 128 | mbedtls_aes_free(&actx); |
dudmuck | 0:8f0d0ae0a077 | 129 | } |
dudmuck | 0:8f0d0ae0a077 | 130 | |
Wayne Roberts |
34:9c8966cd66a2 | 131 | void LoRaMacPayloadDecrypt( |
Wayne Roberts |
34:9c8966cd66a2 | 132 | const uint8_t *buffer, |
Wayne Roberts |
34:9c8966cd66a2 | 133 | uint16_t size, |
Wayne Roberts |
34:9c8966cd66a2 | 134 | const uint8_t *key, |
Wayne Roberts |
34:9c8966cd66a2 | 135 | uint32_t address, |
Wayne Roberts |
34:9c8966cd66a2 | 136 | uint8_t dir, |
Wayne Roberts |
34:9c8966cd66a2 | 137 | uint32_t sequenceCounter, |
Wayne Roberts |
34:9c8966cd66a2 | 138 | uint8_t *decBuffer ) |
dudmuck | 0:8f0d0ae0a077 | 139 | { |
dudmuck | 0:8f0d0ae0a077 | 140 | LoRaMacPayloadEncrypt( buffer, size, key, address, dir, sequenceCounter, decBuffer ); |
dudmuck | 0:8f0d0ae0a077 | 141 | } |
dudmuck | 0:8f0d0ae0a077 | 142 | |
Wayne Roberts |
34:9c8966cd66a2 | 143 | int LoRaMacJoinComputeMic( const uint8_t *buffer, uint16_t size, const uint8_t *key, uint32_t *mic ) |
dudmuck | 0:8f0d0ae0a077 | 144 | { |
Wayne Roberts |
34:9c8966cd66a2 | 145 | int ret; |
Wayne Roberts |
34:9c8966cd66a2 | 146 | uint8_t Mic[16]; |
Wayne Roberts |
34:9c8966cd66a2 | 147 | ret = mbedtls_cipher_cmac_starts(&ctx, key, 128); |
Wayne Roberts |
34:9c8966cd66a2 | 148 | if (ret < 0) |
Wayne Roberts |
34:9c8966cd66a2 | 149 | return ret; |
Wayne Roberts |
34:9c8966cd66a2 | 150 | ret = mbedtls_cipher_cmac_update(&ctx, buffer, size & 0xff); |
Wayne Roberts |
34:9c8966cd66a2 | 151 | if (ret < 0) |
Wayne Roberts |
34:9c8966cd66a2 | 152 | return ret; |
Wayne Roberts |
34:9c8966cd66a2 | 153 | ret = mbedtls_cipher_cmac_finish(&ctx, Mic); |
Wayne Roberts |
34:9c8966cd66a2 | 154 | if (ret < 0) |
Wayne Roberts |
34:9c8966cd66a2 | 155 | return ret; |
dudmuck | 0:8f0d0ae0a077 | 156 | *mic = ( uint32_t )( ( uint32_t )Mic[3] << 24 | ( uint32_t )Mic[2] << 16 | ( uint32_t )Mic[1] << 8 | ( uint32_t )Mic[0] ); |
Wayne Roberts |
34:9c8966cd66a2 | 157 | return 0; |
dudmuck | 0:8f0d0ae0a077 | 158 | } |
dudmuck | 0:8f0d0ae0a077 | 159 | |
Wayne Roberts |
34:9c8966cd66a2 | 160 | int LoRaMacJoinDecrypt( const uint8_t *buffer, uint16_t size, const uint8_t *key, uint8_t *decBuffer ) |
dudmuck | 0:8f0d0ae0a077 | 161 | { |
Wayne Roberts |
34:9c8966cd66a2 | 162 | int ret; |
Wayne Roberts |
34:9c8966cd66a2 | 163 | mbedtls_aes_context actx; |
Wayne Roberts |
34:9c8966cd66a2 | 164 | |
Wayne Roberts |
34:9c8966cd66a2 | 165 | mbedtls_aes_init(&actx); |
Wayne Roberts |
34:9c8966cd66a2 | 166 | ret = mbedtls_aes_setkey_enc(&actx, key, 128); |
Wayne Roberts |
34:9c8966cd66a2 | 167 | if (ret < 0) |
Wayne Roberts |
34:9c8966cd66a2 | 168 | return -1; |
Wayne Roberts |
34:9c8966cd66a2 | 169 | |
Wayne Roberts |
34:9c8966cd66a2 | 170 | mbedtls_aes_encrypt(&actx, buffer, decBuffer); |
Wayne Roberts |
34:9c8966cd66a2 | 171 | |
Wayne Roberts |
34:9c8966cd66a2 | 172 | if (size >= 16) { |
Wayne Roberts |
34:9c8966cd66a2 | 173 | mbedtls_aes_encrypt(&actx, buffer + 16, decBuffer + 16); |
dudmuck | 0:8f0d0ae0a077 | 174 | } |
Wayne Roberts |
34:9c8966cd66a2 | 175 | |
Wayne Roberts |
34:9c8966cd66a2 | 176 | mbedtls_aes_free(&actx); |
Wayne Roberts |
34:9c8966cd66a2 | 177 | |
Wayne Roberts |
34:9c8966cd66a2 | 178 | return 0; |
dudmuck | 0:8f0d0ae0a077 | 179 | } |
dudmuck | 0:8f0d0ae0a077 | 180 | |
Wayne Roberts |
34:9c8966cd66a2 | 181 | int LoRaMacJoinComputeSKeys( const uint8_t *key, const uint8_t *appNonce, uint16_t devNonce, uint8_t *nwkSKey, uint8_t *appSKey ) |
dudmuck | 0:8f0d0ae0a077 | 182 | { |
Wayne Roberts |
34:9c8966cd66a2 | 183 | mbedtls_aes_context actx; |
dudmuck | 0:8f0d0ae0a077 | 184 | uint8_t nonce[16]; |
dudmuck | 0:8f0d0ae0a077 | 185 | uint8_t *pDevNonce = ( uint8_t * )&devNonce; |
Wayne Roberts |
34:9c8966cd66a2 | 186 | |
Wayne Roberts |
34:9c8966cd66a2 | 187 | mbedtls_aes_init(&actx); |
Wayne Roberts |
34:9c8966cd66a2 | 188 | if (mbedtls_aes_setkey_enc(&actx, key, 128) < 0) |
Wayne Roberts |
34:9c8966cd66a2 | 189 | return -1; |
dudmuck | 0:8f0d0ae0a077 | 190 | |
dudmuck | 0:8f0d0ae0a077 | 191 | memset1( nonce, 0, sizeof( nonce ) ); |
dudmuck | 0:8f0d0ae0a077 | 192 | nonce[0] = 0x01; |
dudmuck | 0:8f0d0ae0a077 | 193 | memcpy1( nonce + 1, appNonce, 6 ); |
dudmuck | 0:8f0d0ae0a077 | 194 | memcpy1( nonce + 7, pDevNonce, 2 ); |
Wayne Roberts |
34:9c8966cd66a2 | 195 | mbedtls_aes_encrypt(&actx, nonce, nwkSKey); |
dudmuck | 0:8f0d0ae0a077 | 196 | |
dudmuck | 0:8f0d0ae0a077 | 197 | memset1( nonce, 0, sizeof( nonce ) ); |
dudmuck | 0:8f0d0ae0a077 | 198 | nonce[0] = 0x02; |
dudmuck | 0:8f0d0ae0a077 | 199 | memcpy1( nonce + 1, appNonce, 6 ); |
dudmuck | 0:8f0d0ae0a077 | 200 | memcpy1( nonce + 7, pDevNonce, 2 ); |
Wayne Roberts |
34:9c8966cd66a2 | 201 | mbedtls_aes_encrypt(&actx, nonce, appSKey); |
Wayne Roberts |
34:9c8966cd66a2 | 202 | |
Wayne Roberts |
34:9c8966cd66a2 | 203 | mbedtls_aes_free(&actx); |
Wayne Roberts |
34:9c8966cd66a2 | 204 | |
Wayne Roberts |
34:9c8966cd66a2 | 205 | return 0; |
dudmuck | 0:8f0d0ae0a077 | 206 | } |
Wayne Roberts |
34:9c8966cd66a2 | 207 | |
Wayne Roberts |
34:9c8966cd66a2 | 208 | int LoRaMacCryptoInit() |
Wayne Roberts |
34:9c8966cd66a2 | 209 | { |
Wayne Roberts |
34:9c8966cd66a2 | 210 | int ret; |
Wayne Roberts |
34:9c8966cd66a2 | 211 | const mbedtls_cipher_info_t *cipher_info; |
Wayne Roberts |
34:9c8966cd66a2 | 212 | mbedtls_cipher_init(&ctx); |
Wayne Roberts |
34:9c8966cd66a2 | 213 | cipher_info = mbedtls_cipher_info_from_type( MBEDTLS_CIPHER_AES_128_ECB ); |
Wayne Roberts |
34:9c8966cd66a2 | 214 | if (cipher_info == NULL) { |
Wayne Roberts |
34:9c8966cd66a2 | 215 | return -1; |
Wayne Roberts |
34:9c8966cd66a2 | 216 | } |
Wayne Roberts |
34:9c8966cd66a2 | 217 | ret = mbedtls_cipher_setup(&ctx, cipher_info); |
Wayne Roberts |
34:9c8966cd66a2 | 218 | return ret; |
Wayne Roberts |
34:9c8966cd66a2 | 219 | } |
Wayne Roberts |
34:9c8966cd66a2 | 220 |