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/*
* BLESecurity.cpp
*
* Created on: Dec 17, 2017
* Author: chegewara
*/
#include "BLESecurity.h"
#include "sdkconfig.h"
#if defined(CONFIG_BT_ENABLED)
BLESecurity::BLESecurity() {
}
BLESecurity::~BLESecurity() {
}
/*
* @brief Set requested authentication mode
*/
void BLESecurity::setAuthenticationMode(esp_ble_auth_req_t auth_req) {
m_authReq = auth_req;
esp_ble_gap_set_security_param(ESP_BLE_SM_AUTHEN_REQ_MODE, &m_authReq, sizeof(uint8_t)); // <--- setup requested authentication mode
}
/**
* @brief Set our device IO capability to let end user perform authorization
* either by displaying or entering generated 6-digits pin code
*/
void BLESecurity::setCapability(esp_ble_io_cap_t iocap) {
m_iocap = iocap;
esp_ble_gap_set_security_param(ESP_BLE_SM_IOCAP_MODE, &iocap, sizeof(uint8_t));
} // setCapability
/**
* @brief Init encryption key by server
* @param key_size is value between 7 and 16
*/
void BLESecurity::setInitEncryptionKey(uint8_t init_key) {
m_initKey = init_key;
esp_ble_gap_set_security_param(ESP_BLE_SM_SET_INIT_KEY, &m_initKey, sizeof(uint8_t));
} // setInitEncryptionKey
/**
* @brief Init encryption key by client
* @param key_size is value between 7 and 16
*/
void BLESecurity::setRespEncryptionKey(uint8_t resp_key) {
m_respKey = resp_key;
esp_ble_gap_set_security_param(ESP_BLE_SM_SET_RSP_KEY, &m_respKey, sizeof(uint8_t));
} // setRespEncryptionKey
/**
*
*
*/
void BLESecurity::setKeySize(uint8_t key_size) {
m_keySize = key_size;
esp_ble_gap_set_security_param(ESP_BLE_SM_MAX_KEY_SIZE, &m_keySize, sizeof(uint8_t));
} //setKeySize
/**
* Setup for static PIN connection, call it first and then call setAuthenticationMode eventually to change it
*/
void BLESecurity::setStaticPIN(uint32_t pin){
uint32_t passkey = pin;
esp_ble_gap_set_security_param(ESP_BLE_SM_SET_STATIC_PASSKEY, &passkey, sizeof(uint32_t));
setCapability(ESP_IO_CAP_OUT);
setKeySize();
setAuthenticationMode(ESP_LE_AUTH_REQ_SC_ONLY);
setInitEncryptionKey(ESP_BLE_ENC_KEY_MASK | ESP_BLE_ID_KEY_MASK);
}
/**
* @brief Debug function to display what keys are exchanged by peers
*/
char* BLESecurity::esp_key_type_to_str(esp_ble_key_type_t key_type) {
char* key_str = nullptr;
switch (key_type) {
case ESP_LE_KEY_NONE:
key_str = (char*) "ESP_LE_KEY_NONE";
break;
case ESP_LE_KEY_PENC:
key_str = (char*) "ESP_LE_KEY_PENC";
break;
case ESP_LE_KEY_PID:
key_str = (char*) "ESP_LE_KEY_PID";
break;
case ESP_LE_KEY_PCSRK:
key_str = (char*) "ESP_LE_KEY_PCSRK";
break;
case ESP_LE_KEY_PLK:
key_str = (char*) "ESP_LE_KEY_PLK";
break;
case ESP_LE_KEY_LLK:
key_str = (char*) "ESP_LE_KEY_LLK";
break;
case ESP_LE_KEY_LENC:
key_str = (char*) "ESP_LE_KEY_LENC";
break;
case ESP_LE_KEY_LID:
key_str = (char*) "ESP_LE_KEY_LID";
break;
case ESP_LE_KEY_LCSRK:
key_str = (char*) "ESP_LE_KEY_LCSRK";
break;
default:
key_str = (char*) "INVALID BLE KEY TYPE";
break;
}
return key_str;
} // esp_key_type_to_str
#endif // CONFIG_BT_ENABLED
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