mirror of
https://github.com/manuelbl/ttn-esp32.git
synced 2025-06-15 04:14:28 +02:00
Add provisioning task, refactor provisioning
This commit is contained in:
Manuel Bleichenbacher
parent
2dd5b05891
commit
b179ce6884
1
.gitignore
vendored
1
.gitignore
vendored
@ -1,4 +1,5 @@
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build/
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sdkconfig
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sdkconfig.old
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dev_keys.txt
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ttn-esp32
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8
.vscode/settings.json
vendored
Normal file
8
.vscode/settings.json
vendored
Normal file
@ -0,0 +1,8 @@
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{
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"files.associations": {
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"provisioning.h": "c",
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"config.h": "c",
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"sdkconfig.h": "c",
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"oslmic.h": "c"
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}
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}
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71
Kconfig
71
Kconfig
@ -68,4 +68,75 @@ config TTN_BG_TASK_PRIO
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the LoRaWAN radio chip. It needs a high priority as the timing is crucial.
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Higher numbers indicate higher priority.
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choice TTN_PROVISION_UART
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prompt "UART for provisioning"
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default TTN_PROVISION_UART_DEFAULT
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help
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Select whether to use UART for listening for provisioning commands.
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- Default is to use UART0 on pins GPIO1(TX) and GPIO3(RX).
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- If "Custom" is selected, UART0 or UART1 can be chosen,
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and any pins can be selected.
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- If "None" is selected, the feature is not available.
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config TTN_PROVISION_UART_DEFAULT
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bool "Default: UART0, TX=GPIO1, RX=GPIO3, 115,200 baud"
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config TTN_PROVISION_UART_CUSTOM
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bool "Custom"
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config TTN_PROVISION_UART_NONE
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bool "None"
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endchoice
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choice TTN_PROVISION_UART_INIT
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prompt "Initialize UART"
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default TTN_PROVISION_UART_INIT_NO
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depends on !TTN_PROVISION_UART_NONE
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help
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Select whether to initialize the UART, i.e. set the baud rate, the RX and TX
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pins. If the UART is shared with other features (e.g. the console), it
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should not be initialized.
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config TTN_PROVISION_UART_INIT_NO
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bool "No"
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config TTN_PROVISION_UART_INIT_YES
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bool "Yes"
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endchoice
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choice TTN_PROVISION_UART_NUM
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prompt "UART peripheral for provisioning (0-1)"
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depends on TTN_PROVISION_UART_CUSTOM
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default TTN_PROVISION_UART_CUSTOM_NUM_0
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config TTN_PROVISION_UART_CUSTOM_NUM_0
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bool "UART0"
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config TTN_PROVISION_UART_CUSTOM_NUM_1
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bool "UART1"
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endchoice
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config TTN_PROVISION_UART_NUM
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int
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default 0 if TTN_PROVISION_UART_DEFAULT || TTN_PROVISION_UART_NONE
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default 0 if TTN_PROVISION_UART_CUSTOM_NUM_0
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default 1 if TTN_PROVISION_UART_CUSTOM_NUM_1
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config TTN_PROVISION_UART_TX_GPIO
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int "Provisioning UART TX on GPIO#"
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depends on TTN_PROVISION_UART_CUSTOM && TTN_PROVISION_UART_INIT_YES
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range 0 33
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default 19
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config TTN_PROVISION_UART_RX_GPIO
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int "Provisioning UART RX on GPIO#"
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depends on TTN_PROVISION_UART_CUSTOM && TTN_PROVISION_UART_INIT_YES
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range 0 39
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default 21
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config TTN_PROVISION_UART_BAUDRATE
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int "Provisioning UART baud rate"
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depends on TTN_PROVISION_UART_CUSTOM && TTN_PROVISION_UART_INIT_YES
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default 115200
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range 1200 4000000
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endmenu
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@ -104,6 +104,13 @@ public:
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*/
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bool provision(const char *devEui, const char *appEui, const char *appKey);
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/**
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* @brief Start task that listens on configured UART for provisioning commands.
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*
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* Run 'make menuconfig' to configure it.
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*/
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void startProvisioningTask();
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/**
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* @brief Activate the device via OTAA.
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*
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@ -176,12 +183,8 @@ public:
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private:
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TTNMessageCallback messageCallback;
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bool haveKeys;
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bool joinCore();
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bool decodeKeys(const char *devEui, const char *appEui, const char *appKey);
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bool saveKeys();
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bool restoreKeys(bool silent);
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};
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#endif
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@ -12,13 +12,13 @@
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#include "freertos/FreeRTOS.h"
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#include "esp_event.h"
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#include "nvs_flash.h"
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#include "TheThingsNetwork.h"
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#include "esp_log.h"
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#include "oslmic.h"
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#include "TheThingsNetwork.h"
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#include "hal.h"
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#include "hal_esp32.h"
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#include "lmic.h"
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#include "provisioning.h"
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enum ClientAction
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{
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@ -28,29 +28,14 @@ enum ClientAction
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};
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static const char *TAG = "ttn";
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static const char *NVS_FLASH_PARTITION = "ttn";
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static const char *NVS_FLASH_KEY_DEV_EUI = "devEui";
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static const char *NVS_FLASH_KEY_APP_EUI = "appEui";
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static const char *NVS_FLASH_KEY_APP_KEY = "appKey";
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static TheThingsNetwork* ttnInstance;
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static uint8_t devEui[8];
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static uint8_t appEui[8];
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static uint8_t appKey[16];
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static QueueHandle_t resultQueue;
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static ClientAction clientAction = eActionUnrelated;
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static bool readNvsValue(nvs_handle handle, const char* key, uint8_t* data, size_t expectedLength, bool silent);
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static bool writeNvsValue(nvs_handle handle, const char* key, const uint8_t* data, size_t len);
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static bool hexStringToBin(const char *hex, uint8_t *buf, int len);
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static int hexTupleToByte(const char *hex);
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static int hexDigitToVal(char ch);
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static void swapByteOrder(uint8_t* buf, int len);
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TheThingsNetwork::TheThingsNetwork()
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: messageCallback(NULL), haveKeys(false)
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: messageCallback(NULL)
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{
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ASSERT(ttnInstance == NULL);
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ttnInstance = this;
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@ -89,45 +74,23 @@ void TheThingsNetwork::reset()
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bool TheThingsNetwork::provision(const char *devEui, const char *appEui, const char *appKey)
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{
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if (!decodeKeys(devEui, appEui, appKey))
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if (!provisioning_decode_keys(devEui, appEui, appKey))
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return false;
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return saveKeys();
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return provisioning_save_keys();
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}
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bool TheThingsNetwork::decodeKeys(const char *devEui, const char *appEui, const char *appKey)
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void TheThingsNetwork::startProvisioningTask()
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{
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haveKeys = false;
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if (strlen(devEui) != 16 || !hexStringToBin(devEui, ::devEui, 8))
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{
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ESP_LOGW(TAG, "Invalid device EUI: %s", devEui);
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return false;
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}
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swapByteOrder(::devEui, 8);
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if (strlen(appEui) != 16 || !hexStringToBin(appEui, ::appEui, 8))
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{
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ESP_LOGW(TAG, "Invalid application EUI: %s", appEui);
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return false;
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}
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swapByteOrder(::appEui, 8);
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if (strlen(appKey) != 32 || !hexStringToBin(appKey, ::appKey, 16))
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{
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ESP_LOGW(TAG, "Invalid application key: %s", appEui);
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return false;
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}
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haveKeys = true;
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return true;
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#if !defined(CONFIG_TTN_PROVISION_UART_NONE)
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provisioning_start_task();
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#endif
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}
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bool TheThingsNetwork::join(const char *devEui, const char *appEui, const char *appKey)
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{
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if (!decodeKeys(devEui, appEui, appKey))
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if (!provisioning_decode_keys(devEui, appEui, appKey))
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return false;
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return joinCore();
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@ -135,9 +98,9 @@ bool TheThingsNetwork::join(const char *devEui, const char *appEui, const char *
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bool TheThingsNetwork::join()
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{
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if (!haveKeys)
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if (!provisioning_have_keys())
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{
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if (!restoreKeys(false))
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if (!provisioning_restore_keys(false))
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return false;
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}
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@ -146,7 +109,7 @@ bool TheThingsNetwork::join()
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bool TheThingsNetwork::joinCore()
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{
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if (!haveKeys)
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if (!provisioning_have_keys())
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{
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ESP_LOGW(TAG, "Device EUI, App EUI and/or App key have not been provided");
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return false;
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@ -205,118 +168,13 @@ void TheThingsNetwork::onMessage(TTNMessageCallback callback)
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messageCallback = callback;
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}
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bool TheThingsNetwork::saveKeys()
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{
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bool result = false;
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nvs_handle handle = 0;
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esp_err_t res = nvs_open(NVS_FLASH_PARTITION, NVS_READWRITE, &handle);
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if (res == ESP_ERR_NVS_NOT_INITIALIZED)
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{
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ESP_LOGW(TAG, "NVS storage is not initialized. Call 'nvs_flash_init()' first.");
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goto done;
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}
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ESP_ERROR_CHECK(res);
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if (res != ESP_OK)
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goto done;
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if (!writeNvsValue(handle, NVS_FLASH_KEY_DEV_EUI, ::devEui, sizeof(::devEui)))
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goto done;
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if (!writeNvsValue(handle, NVS_FLASH_KEY_APP_EUI, ::appEui, sizeof(::appEui)))
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goto done;
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if (!writeNvsValue(handle, NVS_FLASH_KEY_APP_KEY, ::appKey, sizeof(::appKey)))
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goto done;
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res = nvs_commit(handle);
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ESP_ERROR_CHECK(res);
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result = true;
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ESP_LOGI(TAG, "Dev and app EUI and app key saved in NVS storage");
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done:
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nvs_close(handle);
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return result;
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}
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bool TheThingsNetwork::restoreKeys(bool silent)
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{
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haveKeys = false;
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nvs_handle handle = 0;
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esp_err_t res = nvs_open(NVS_FLASH_PARTITION, NVS_READONLY, &handle);
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if (res == ESP_ERR_NVS_NOT_FOUND)
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return false; // partition does not exist yet
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if (res == ESP_ERR_NVS_NOT_INITIALIZED)
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{
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ESP_LOGW(TAG, "NVS storage is not initialized. Call 'nvs_flash_init()' first.");
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goto done;
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}
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ESP_ERROR_CHECK(res);
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if (res != ESP_OK)
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goto done;
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if (!readNvsValue(handle, NVS_FLASH_KEY_DEV_EUI, ::devEui, sizeof(::devEui), silent))
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goto done;
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if (!readNvsValue(handle, NVS_FLASH_KEY_APP_EUI, ::appEui, sizeof(::appEui), silent))
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goto done;
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if (!readNvsValue(handle, NVS_FLASH_KEY_APP_KEY, ::appKey, sizeof(::appKey), silent))
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goto done;
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haveKeys = true;
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ESP_LOGI(TAG, "Dev and app EUI and app key have been restored from NVS storage");
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done:
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nvs_close(handle);
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return haveKeys;
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}
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bool TheThingsNetwork::isProvisioned()
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{
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if (haveKeys)
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if (provisioning_have_keys())
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return true;
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return restoreKeys(true);
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}
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bool readNvsValue(nvs_handle handle, const char* key, uint8_t* data, size_t expectedLength, bool silent)
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{
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size_t size = expectedLength;
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esp_err_t res = nvs_get_blob(handle, key, data, &size);
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if (res == ESP_OK && size == expectedLength)
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return true;
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if (res == ESP_OK && size != expectedLength)
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{
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if (!silent)
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ESP_LOGW(TAG, "Invalid size of NVS data for %s", key);
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return false;
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}
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if (res == ESP_ERR_NVS_NOT_FOUND)
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{
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if (!silent)
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ESP_LOGW(TAG, "No NVS data found for %s", key);
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return false;
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}
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ESP_ERROR_CHECK(res);
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return false;
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}
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bool writeNvsValue(nvs_handle handle, const char* key, const uint8_t* data, size_t len)
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{
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uint8_t buf[16];
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if (readNvsValue(handle, key, buf, len, true) && memcmp(buf, data, len) == 0)
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return true; // unchanged
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esp_err_t res = nvs_set_blob(handle, key, data, len);
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ESP_ERROR_CHECK(res);
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return res == ESP_OK;
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return provisioning_restore_keys(true);
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}
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@ -333,29 +191,6 @@ static const char *eventNames[] = {
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};
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#endif
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// This EUI must be in little-endian format, so least-significant-byte first.
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// When copying an EUI from ttnctl output, this means to reverse the bytes.
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// For TTN issued EUIs the last bytes should be 0xD5, 0xB3, 0x70.
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// The order is swapped in TheThingsNetwork::provision().
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void os_getArtEui (u1_t* buf)
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{
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memcpy(buf, appEui, 8);
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}
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// This should also be in little endian format, see above.
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void os_getDevEui (u1_t* buf)
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{
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memcpy(buf, devEui, 8);
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}
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// This key should be in big endian format (or, since it is not really a number
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// but a block of memory, endianness does not really apply). In practice, a key
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// taken from ttnctl can be copied as-is.
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void os_getDevKey (u1_t* buf)
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{
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memcpy(buf, appKey, 16);
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}
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void onEvent (ev_t ev) {
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#if CONFIG_LOG_DEFAULT_LEVEL >= 3
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ESP_LOGI(TAG, "event %s", eventNames[ev]);
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@ -385,56 +220,3 @@ void onEvent (ev_t ev) {
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clientAction = eActionUnrelated;
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xQueueSend(resultQueue, &result, 100 / portTICK_PERIOD_MS);
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}
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// --- Helper functions ---
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bool hexStringToBin(const char *hex, uint8_t *buf, int len)
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{
|
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const char* ptr = hex;
|
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for (int i = 0; i < len; i++)
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{
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int val = hexTupleToByte(ptr);
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if (val < 0)
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return false;
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buf[i] = val;
|
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ptr += 2;
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}
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return true;
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}
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int hexTupleToByte(const char *hex)
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{
|
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int nibble1 = hexDigitToVal(hex[0]);
|
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if (nibble1 < 0)
|
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return -1;
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int nibble2 = hexDigitToVal(hex[1]);
|
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if (nibble2 < 0)
|
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return -1;
|
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return (nibble1 << 4) | nibble2;
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}
|
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|
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int hexDigitToVal(char ch)
|
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{
|
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if (ch >= '0' && ch <= '9')
|
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return ch - '0';
|
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if (ch >= 'A' && ch <= 'F')
|
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return ch + 10 - 'A';
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if (ch >= 'a' && ch <= 'f')
|
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return ch + 10 - 'a';
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return -1;
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}
|
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void swapByteOrder(uint8_t* buf, int len)
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{
|
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uint8_t* p1 = buf;
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uint8_t* p2 = buf + len - 1;
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while (p1 < p2)
|
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{
|
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uint8_t t = *p1;
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*p1 = *p2;
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*p2 = t;
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p1++;
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p2--;
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}
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}
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@ -28,6 +28,9 @@
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#ifndef _hal_hpp_
|
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#define _hal_hpp_
|
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|
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#include "oslmic.h"
|
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|
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|
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#ifdef __cplusplus
|
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extern "C" {
|
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#endif
|
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|
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453
src/provisioning.c
Normal file
453
src/provisioning.c
Normal file
@ -0,0 +1,453 @@
|
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/*******************************************************************************
|
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*
|
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* ttn-esp32 - The Things Network device library for ESP-IDF / SX127x
|
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*
|
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* Copyright (c) 2018 Manuel Bleichenbacher
|
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*
|
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* Licensed under MIT License
|
||||
* https://opensource.org/licenses/MIT
|
||||
*
|
||||
* Task listening on a UART port for provisioning commands.
|
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*******************************************************************************/
|
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|
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#include "freertos/FreeRTOS.h"
|
||||
#include "driver/uart.h"
|
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#include "esp_event.h"
|
||||
#include "esp_log.h"
|
||||
#include "nvs_flash.h"
|
||||
#include "provisioning.h"
|
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|
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#define UART_NUM CONFIG_TTN_PROVISION_UART_NUM
|
||||
#define MAX_LINE_LENGTH 128
|
||||
|
||||
static const char *TAG = "ttn_prov";
|
||||
static const char *NVS_FLASH_PARTITION = "ttn";
|
||||
static const char *NVS_FLASH_KEY_DEV_EUI = "devEui";
|
||||
static const char *NVS_FLASH_KEY_APP_EUI = "appEui";
|
||||
static const char *NVS_FLASH_KEY_APP_KEY = "appKey";
|
||||
|
||||
static void provisioning_task(void* pvParameter);
|
||||
static void provisioning_add_line_data(int numBytes);
|
||||
static void provisioning_detect_line_end(int start_at);
|
||||
static void provisioning_process_line();
|
||||
static bool read_nvs_value(nvs_handle handle, const char* key, uint8_t* data, size_t expected_length, bool silent);
|
||||
static bool write_nvs_value(nvs_handle handle, const char* key, const uint8_t* data, size_t len);
|
||||
static bool hex_str_to_bin(const char *hex, uint8_t *buf, int len);
|
||||
static int hex_tuple_to_byte(const char *hex);
|
||||
static int hex_digit_to_val(char ch);
|
||||
static void bin_to_hex_str(const uint8_t* buf, int len, char* hex);
|
||||
static char val_to_hex_digit(int val);
|
||||
static void swap_bytes(uint8_t* buf, int len);
|
||||
|
||||
|
||||
static QueueHandle_t uart_queue = NULL;
|
||||
static char* line_buf;
|
||||
static int line_length;
|
||||
static uint8_t last_line_end_char = 0;
|
||||
static uint8_t global_dev_eui[8];
|
||||
static uint8_t global_app_eui[8];
|
||||
static uint8_t global_app_key[16];
|
||||
static bool have_keys = false;
|
||||
|
||||
|
||||
#if defined(CONFIG_TTN_PROVISION_UART_INIT_YES)
|
||||
static void provisioning_init_uart();
|
||||
#endif
|
||||
|
||||
|
||||
// --- LMIC callbacks
|
||||
|
||||
// This EUI must be in little-endian format, so least-significant-byte first.
|
||||
// When copying an EUI from ttnctl output, this means to reverse the bytes.
|
||||
// For TTN issued EUIs the last bytes should be 0xD5, 0xB3, 0x70.
|
||||
// The order is swapped in provisioning_decode_keys().
|
||||
void os_getArtEui (u1_t* buf)
|
||||
{
|
||||
memcpy(buf, global_app_eui, 8);
|
||||
}
|
||||
|
||||
// This should also be in little endian format, see above.
|
||||
void os_getDevEui (u1_t* buf)
|
||||
{
|
||||
memcpy(buf, global_dev_eui, 8);
|
||||
}
|
||||
|
||||
// This key should be in big endian format (or, since it is not really a number
|
||||
// but a block of memory, endianness does not really apply). In practice, a key
|
||||
// taken from ttnctl can be copied as-is.
|
||||
void os_getDevKey (u1_t* buf)
|
||||
{
|
||||
memcpy(buf, global_app_key, 16);
|
||||
}
|
||||
|
||||
|
||||
// --- Provisioning task
|
||||
|
||||
void provisioning_start_task()
|
||||
{
|
||||
#if defined(CONFIG_TTN_PROVISION_UART_INIT_YES)
|
||||
provisioning_init_uart();
|
||||
#endif
|
||||
|
||||
esp_err_t err = uart_driver_install(UART_NUM, 2048, 2048, 20, &uart_queue, 0);
|
||||
ESP_ERROR_CHECK(err);
|
||||
|
||||
xTaskCreate(provisioning_task, "provisioning", 2048, NULL, 1, NULL);
|
||||
}
|
||||
|
||||
void provisioning_task(void* pvParameter)
|
||||
{
|
||||
line_buf = (char*)malloc(MAX_LINE_LENGTH + 1);
|
||||
line_length = 0;
|
||||
|
||||
uart_event_t event;
|
||||
|
||||
ESP_LOGI(TAG, "Provisioning task started");
|
||||
|
||||
while (true)
|
||||
{
|
||||
if (!xQueueReceive(uart_queue, &event, portMAX_DELAY))
|
||||
continue;
|
||||
|
||||
switch (event.type)
|
||||
{
|
||||
case UART_DATA:
|
||||
provisioning_add_line_data(event.size);
|
||||
break;
|
||||
|
||||
case UART_FIFO_OVF:
|
||||
case UART_BUFFER_FULL:
|
||||
uart_flush_input(UART_NUM);
|
||||
xQueueReset(uart_queue);
|
||||
break;
|
||||
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void provisioning_add_line_data(int numBytes)
|
||||
{
|
||||
int n;
|
||||
top:
|
||||
n = numBytes;
|
||||
if (line_length + n > MAX_LINE_LENGTH)
|
||||
n = MAX_LINE_LENGTH - line_length;
|
||||
|
||||
uart_read_bytes(UART_NUM, (uint8_t*)line_buf + line_length, n, portMAX_DELAY);
|
||||
int start_at = line_length;
|
||||
line_length += n;
|
||||
|
||||
provisioning_detect_line_end(start_at);
|
||||
|
||||
if (n < numBytes)
|
||||
{
|
||||
numBytes -= n;
|
||||
goto top;
|
||||
}
|
||||
}
|
||||
|
||||
void provisioning_detect_line_end(int start_at)
|
||||
{
|
||||
top:
|
||||
for (int p = start_at; p < line_length; p++)
|
||||
{
|
||||
char ch = line_buf[p];
|
||||
if (ch == 0x0d || ch == 0x0a)
|
||||
{
|
||||
if (p > 0)
|
||||
uart_write_bytes(UART_NUM, line_buf + start_at, line_length - start_at - 1);
|
||||
if (p > 0 || ch == 0x0d || last_line_end_char == 0x0a)
|
||||
uart_write_bytes(UART_NUM, "\r\n", 2);
|
||||
|
||||
line_buf[p] = 0;
|
||||
last_line_end_char = ch;
|
||||
|
||||
if (p > 0)
|
||||
provisioning_process_line();
|
||||
|
||||
memcpy(line_buf, line_buf + p + 1, line_length - p - 1);
|
||||
line_length -= p + 1;
|
||||
start_at = 0;
|
||||
goto top;
|
||||
}
|
||||
}
|
||||
|
||||
if (line_length > 0)
|
||||
uart_write_bytes(UART_NUM, line_buf + start_at, line_length - start_at);
|
||||
|
||||
if (line_length == MAX_LINE_LENGTH)
|
||||
line_length = 0; // Line too long; flush it
|
||||
}
|
||||
|
||||
void provisioning_process_line()
|
||||
{
|
||||
bool is_ok = true;
|
||||
// Expected format:
|
||||
// AT+PROV?
|
||||
// AT+PROV=hex16-hex16-hex32
|
||||
if (strcmp(line_buf, "AT+PROV?") == 0)
|
||||
{
|
||||
uint8_t binbuf[8];
|
||||
char hexbuf[16];
|
||||
|
||||
memcpy(binbuf, global_dev_eui, 8);
|
||||
swap_bytes(binbuf, 8);
|
||||
bin_to_hex_str(binbuf, 8, hexbuf);
|
||||
uart_write_bytes(UART_NUM, hexbuf, 16);
|
||||
uart_write_bytes(UART_NUM, "-", 1);
|
||||
|
||||
memcpy(binbuf, global_app_eui, 8);
|
||||
swap_bytes(binbuf, 8);
|
||||
bin_to_hex_str(binbuf, 8, hexbuf);
|
||||
uart_write_bytes(UART_NUM, hexbuf, 16);
|
||||
|
||||
uart_write_bytes(UART_NUM, "-00000000000000000000000000000000\r\n", 35);
|
||||
}
|
||||
else if (strncmp(line_buf, "AT+PROV=", 8) == 0)
|
||||
{
|
||||
if (strlen(line_buf) == 74 && line_buf[24] == '-' && line_buf[41] == '-')
|
||||
{
|
||||
line_buf[24] = 0;
|
||||
line_buf[41] = 0;
|
||||
is_ok = provisioning_decode_keys(line_buf + 8, line_buf + 25, line_buf + 42);
|
||||
}
|
||||
else
|
||||
{
|
||||
is_ok = false;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
is_ok = false;
|
||||
}
|
||||
|
||||
uart_write_bytes(UART_NUM, is_ok ? "OK\r\n" : "ERROR\r\n", is_ok ? 4 : 7);
|
||||
}
|
||||
|
||||
#if defined(CONFIG_TTN_PROVISION_UART_INIT_YES)
|
||||
|
||||
void provisioning_init_uart()
|
||||
{
|
||||
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
// --- Key handling
|
||||
|
||||
bool provisioning_have_keys()
|
||||
{
|
||||
return have_keys;
|
||||
}
|
||||
|
||||
bool provisioning_decode_keys(const char *dev_eui, const char *app_eui, const char *app_key)
|
||||
{
|
||||
have_keys = false;
|
||||
|
||||
if (strlen(dev_eui) != 16 || !hex_str_to_bin(dev_eui, global_dev_eui, 8))
|
||||
{
|
||||
ESP_LOGW(TAG, "Invalid device EUI: %s", dev_eui);
|
||||
return false;
|
||||
}
|
||||
|
||||
swap_bytes(global_dev_eui, 8);
|
||||
|
||||
if (strlen(app_eui) != 16 || !hex_str_to_bin(app_eui, global_app_eui, 8))
|
||||
{
|
||||
ESP_LOGW(TAG, "Invalid application EUI: %s", app_eui);
|
||||
return false;
|
||||
}
|
||||
|
||||
swap_bytes(global_app_eui, 8);
|
||||
|
||||
if (strlen(app_key) != 32 || !hex_str_to_bin(app_key, global_app_key, 16))
|
||||
{
|
||||
ESP_LOGW(TAG, "Invalid application key: %s", app_key);
|
||||
return false;
|
||||
}
|
||||
|
||||
have_keys = true;
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
// --- Non-volatile storage
|
||||
|
||||
bool provisioning_save_keys()
|
||||
{
|
||||
bool result = false;
|
||||
|
||||
nvs_handle handle = 0;
|
||||
esp_err_t res = nvs_open(NVS_FLASH_PARTITION, NVS_READWRITE, &handle);
|
||||
if (res == ESP_ERR_NVS_NOT_INITIALIZED)
|
||||
{
|
||||
ESP_LOGW(TAG, "NVS storage is not initialized. Call 'nvs_flash_init()' first.");
|
||||
goto done;
|
||||
}
|
||||
ESP_ERROR_CHECK(res);
|
||||
if (res != ESP_OK)
|
||||
goto done;
|
||||
|
||||
if (!write_nvs_value(handle, NVS_FLASH_KEY_DEV_EUI, global_dev_eui, sizeof(global_dev_eui)))
|
||||
goto done;
|
||||
|
||||
if (!write_nvs_value(handle, NVS_FLASH_KEY_APP_EUI, global_app_eui, sizeof(global_app_eui)))
|
||||
goto done;
|
||||
|
||||
if (!write_nvs_value(handle, NVS_FLASH_KEY_APP_KEY, global_app_key, sizeof(global_app_key)))
|
||||
goto done;
|
||||
|
||||
res = nvs_commit(handle);
|
||||
ESP_ERROR_CHECK(res);
|
||||
|
||||
result = true;
|
||||
ESP_LOGI(TAG, "Dev and app EUI and app key saved in NVS storage");
|
||||
|
||||
done:
|
||||
nvs_close(handle);
|
||||
return result;
|
||||
}
|
||||
|
||||
bool provisioning_restore_keys(bool silent)
|
||||
{
|
||||
have_keys = false;
|
||||
|
||||
nvs_handle handle = 0;
|
||||
esp_err_t res = nvs_open(NVS_FLASH_PARTITION, NVS_READONLY, &handle);
|
||||
if (res == ESP_ERR_NVS_NOT_FOUND)
|
||||
return false; // partition does not exist yet
|
||||
if (res == ESP_ERR_NVS_NOT_INITIALIZED)
|
||||
{
|
||||
ESP_LOGW(TAG, "NVS storage is not initialized. Call 'nvs_flash_init()' first.");
|
||||
goto done;
|
||||
}
|
||||
ESP_ERROR_CHECK(res);
|
||||
if (res != ESP_OK)
|
||||
goto done;
|
||||
|
||||
if (!read_nvs_value(handle, NVS_FLASH_KEY_DEV_EUI, global_dev_eui, sizeof(global_dev_eui), silent))
|
||||
goto done;
|
||||
|
||||
if (!read_nvs_value(handle, NVS_FLASH_KEY_APP_EUI, global_app_eui, sizeof(global_app_eui), silent))
|
||||
goto done;
|
||||
|
||||
if (!read_nvs_value(handle, NVS_FLASH_KEY_APP_KEY, global_app_key, sizeof(global_app_key), silent))
|
||||
goto done;
|
||||
|
||||
have_keys = true;
|
||||
ESP_LOGI(TAG, "Dev and app EUI and app key have been restored from NVS storage");
|
||||
|
||||
done:
|
||||
nvs_close(handle);
|
||||
return have_keys;
|
||||
}
|
||||
|
||||
bool read_nvs_value(nvs_handle handle, const char* key, uint8_t* data, size_t expected_length, bool silent)
|
||||
{
|
||||
size_t size = expected_length;
|
||||
esp_err_t res = nvs_get_blob(handle, key, data, &size);
|
||||
if (res == ESP_OK && size == expected_length)
|
||||
return true;
|
||||
|
||||
if (res == ESP_OK && size != expected_length)
|
||||
{
|
||||
if (!silent)
|
||||
ESP_LOGW(TAG, "Invalid size of NVS data for %s", key);
|
||||
return false;
|
||||
}
|
||||
|
||||
if (res == ESP_ERR_NVS_NOT_FOUND)
|
||||
{
|
||||
if (!silent)
|
||||
ESP_LOGW(TAG, "No NVS data found for %s", key);
|
||||
return false;
|
||||
}
|
||||
|
||||
ESP_ERROR_CHECK(res);
|
||||
return false;
|
||||
}
|
||||
|
||||
bool write_nvs_value(nvs_handle handle, const char* key, const uint8_t* data, size_t len)
|
||||
{
|
||||
uint8_t buf[16];
|
||||
if (read_nvs_value(handle, key, buf, len, true) && memcmp(buf, data, len) == 0)
|
||||
return true; // unchanged
|
||||
|
||||
esp_err_t res = nvs_set_blob(handle, key, data, len);
|
||||
ESP_ERROR_CHECK(res);
|
||||
|
||||
return res == ESP_OK;
|
||||
}
|
||||
|
||||
|
||||
// --- Helper functions ---
|
||||
|
||||
bool hex_str_to_bin(const char *hex, uint8_t *buf, int len)
|
||||
{
|
||||
const char* ptr = hex;
|
||||
for (int i = 0; i < len; i++)
|
||||
{
|
||||
int val = hex_tuple_to_byte(ptr);
|
||||
if (val < 0)
|
||||
return false;
|
||||
buf[i] = val;
|
||||
ptr += 2;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
int hex_tuple_to_byte(const char *hex)
|
||||
{
|
||||
int nibble1 = hex_digit_to_val(hex[0]);
|
||||
if (nibble1 < 0)
|
||||
return -1;
|
||||
int nibble2 = hex_digit_to_val(hex[1]);
|
||||
if (nibble2 < 0)
|
||||
return -1;
|
||||
return (nibble1 << 4) | nibble2;
|
||||
}
|
||||
|
||||
int hex_digit_to_val(char ch)
|
||||
{
|
||||
if (ch >= '0' && ch <= '9')
|
||||
return ch - '0';
|
||||
if (ch >= 'A' && ch <= 'F')
|
||||
return ch + 10 - 'A';
|
||||
if (ch >= 'a' && ch <= 'f')
|
||||
return ch + 10 - 'a';
|
||||
return -1;
|
||||
}
|
||||
|
||||
void bin_to_hex_str(const uint8_t* buf, int len, char* hex)
|
||||
{
|
||||
for (int i = 0; i < len; i++)
|
||||
{
|
||||
uint8_t b = buf[i];
|
||||
*hex = val_to_hex_digit((b & 0xf0) >> 4);
|
||||
hex++;
|
||||
*hex = val_to_hex_digit(b & 0x0f);
|
||||
hex++;
|
||||
}
|
||||
}
|
||||
|
||||
char val_to_hex_digit(int val)
|
||||
{
|
||||
return "0123456789ABCDEF"[val];
|
||||
}
|
||||
|
||||
void swap_bytes(uint8_t* buf, int len)
|
||||
{
|
||||
uint8_t* p1 = buf;
|
||||
uint8_t* p2 = buf + len - 1;
|
||||
while (p1 < p2)
|
||||
{
|
||||
uint8_t t = *p1;
|
||||
*p1 = *p2;
|
||||
*p2 = t;
|
||||
p1++;
|
||||
p2--;
|
||||
}
|
||||
}
|
||||
35
src/provisioning.h
Normal file
35
src/provisioning.h
Normal file
@ -0,0 +1,35 @@
|
||||
/*******************************************************************************
|
||||
*
|
||||
* ttn-esp32 - The Things Network device library for ESP-IDF / SX127x
|
||||
*
|
||||
* Copyright (c) 2018 Manuel Bleichenbacher
|
||||
*
|
||||
* Licensed under MIT License
|
||||
* https://opensource.org/licenses/MIT
|
||||
*
|
||||
* Task listening on a UART port for provisioning commands.
|
||||
*******************************************************************************/
|
||||
|
||||
#ifndef _provision_task_h_
|
||||
#define _provision_task_h_
|
||||
|
||||
#include "oslmic.h"
|
||||
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
|
||||
void provisioning_start_task();
|
||||
bool provisioning_have_keys();
|
||||
bool provisioning_decode_keys(const char *dev_eui, const char *app_eui, const char *app_key);
|
||||
bool provisioning_save_keys();
|
||||
bool provisioning_restore_keys(bool silent);
|
||||
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue
Block a user