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- #include "nrf_gzp.h"
- #include "nrf_gzll.h"
- #include <string.h>
- #include <stdint.h>
- #include <stdbool.h>
- #include "nrf_assert.h"
- #include "nrf_ecb.h"
- #include "nrf_nvmc.h"
- #define GZP_PARAMS_DB_ADR GZP_PARAMS_STORAGE_ADR
- typedef enum
- {
- GZP_ID_REQ_IDLE,
- GZP_ID_REQ_PENDING,
- GZP_ID_REQ_PENDING_AND_GRANTED,
- GZP_ID_REQ_PENDING_AND_REJECTED,
- } gzp_id_req_stat_t;
- static void gzp_session_counter_inc(void);
- static void gzp_get_session_counter(uint8_t* dst);
- static void gzp_process_address_req(uint8_t* gzp_req);
- static void gzp_process_id_req(uint8_t* rx_payload);
- static void gzp_process_id_fetch(uint8_t* rx_payload);
- static void gzp_process_key_update_prepare(void);
- static void gzp_process_key_update(uint8_t* rx_payload);
- static void gzp_process_encrypted_user_data(uint8_t* rx_payload, uint8_t length);
- static void gzp_preload_ack(uint8_t* src, uint8_t length, uint8_t pipe);
- void gzp_host_chip_id_read(uint8_t *dst, uint8_t n);
- static void gzp_set_host_id(const uint8_t* src);
- static void gzll_goto_idle(void);
- static void gzll_tx_fifo_flush(void);
- static void gzll_rx_fifo_flush(void);
- static void gzll_set_rx_timeout(uint32_t timeout);
- static gzp_id_req_stat_t gzp_id_req_stat;
- static bool gzp_pairing_enabled_f;
- static bool gzp_address_exchanged_f;
- static uint8_t gzp_session_counter[GZP_SESSION_TOKEN_LENGTH];
- static bool gzp_encrypted_user_data[GZP_ENCRYPTED_USER_DATA_MAX_LENGTH];
- static uint8_t gzp_encrypted_user_data_length;
- static nrf_gzll_host_rx_info_t prev_gzp_rx_info = {0, 0};
- #define REP4(X) X X X X
- #if defined(__ICCARM__)
- #if GZP_PARAMS_DB_ADR == 0x1000
- static const uint32_t database[GZP_DEVICE_PARAMS_STORAGE_SIZE/4] @ "gzp_dev_data"
- #elif GZP_PARAMS_DB_ADR == 0x15000
- static const uint32_t database[GZP_DEVICE_PARAMS_STORAGE_SIZE/4] @ "gzp_dev_data_sd"
- #else
- #error
- #endif
- #elif defined(__GNUC__)
- static const uint32_t database[GZP_DEVICE_PARAMS_STORAGE_SIZE / 4] __attribute__((section(".gzll_paring")))
- #else
- static const uint32_t database[GZP_DEVICE_PARAMS_STORAGE_SIZE / 4] __attribute__((at(GZP_PARAMS_DB_ADR)))
- #endif
- = {
- #define STATIC_INIT_VALUE 0xFFFFFFFF
- #define STATIC_INIT_COUNT (GZP_DEVICE_PARAMS_STORAGE_SIZE / 4)
- #define INIT_1 STATIC_INIT_VALUE,
- #define INIT_4 REP4(INIT_1)
- #define INIT_16 REP4(INIT_4)
- #define INIT_64 REP4(INIT_16)
- #define INIT_256 REP4(INIT_64)
- #define INIT_1024 REP4(INIT_256)
- #if (STATIC_INIT_COUNT == 256)
- INIT_256
- #elif (STATIC_INIT_COUNT == 1024)
- INIT_1024
- #else
- #error Gazell Pairing Library database not initialized properly!
- #endif
- };
- void gzp_init()
- {
- uint8_t system_address[GZP_SYSTEM_ADDRESS_WIDTH];
-
-
- gzp_host_chip_id_read(system_address, GZP_SYSTEM_ADDRESS_WIDTH);
-
- (void)gzp_update_radio_params(system_address);
-
- (void)nrf_gzll_set_rx_pipes_enabled(nrf_gzll_get_rx_pipes_enabled() | (1 << GZP_DATA_PIPE));
- gzp_pairing_enabled_f = false;
- gzp_address_exchanged_f = false;
- gzp_id_req_stat = GZP_ID_REQ_IDLE;
- gzp_encrypted_user_data_length = 0;
-
- gzll_set_rx_timeout(0);
- }
- void gzp_pairing_enable(bool enable)
- {
- if (gzp_pairing_enabled_f != enable)
- {
- gzll_goto_idle();
- if (enable)
- {
- (void)nrf_gzll_set_rx_pipes_enabled(nrf_gzll_get_rx_pipes_enabled() | (1 << GZP_PAIRING_PIPE));
- }
- else
- {
- (void)nrf_gzll_set_rx_pipes_enabled(nrf_gzll_get_rx_pipes_enabled() & ~(1 << GZP_PAIRING_PIPE));
- gzp_id_req_stat = GZP_ID_REQ_IDLE;
- }
- gzp_pairing_enabled_f = enable;
- gzll_rx_start();
- }
- }
- void gzp_host_execute()
- {
- bool gzp_packet_received = false;
- uint32_t payload_length = NRF_GZLL_CONST_MAX_PAYLOAD_LENGTH;
- uint8_t rx_payload[NRF_GZLL_CONST_MAX_PAYLOAD_LENGTH];
- gzp_address_exchanged_f = false;
- if (nrf_gzll_get_rx_fifo_packet_count(GZP_PAIRING_PIPE) > 0)
- {
- gzp_packet_received = nrf_gzll_fetch_packet_from_rx_fifo(GZP_PAIRING_PIPE, rx_payload, &payload_length);
- }
- if (!gzp_packet_received && (gzp_encrypted_user_data_length == 0))
- {
- if (nrf_gzll_get_rx_fifo_packet_count(GZP_DATA_PIPE) > 0)
- {
- gzp_packet_received = nrf_gzll_fetch_packet_from_rx_fifo(GZP_DATA_PIPE, rx_payload, &payload_length);
- }
- }
- if (gzp_packet_received)
- {
-
- switch (rx_payload[0])
- {
- case GZP_CMD_HOST_ADDRESS_REQ:
- gzp_process_address_req(rx_payload);
- break;
- #ifndef GZP_CRYPT_DISABLE
- case GZP_CMD_HOST_ID_REQ:
- gzp_process_id_req(rx_payload);
- break;
- case GZP_CMD_HOST_ID_FETCH:
- gzp_process_id_fetch(rx_payload);
- break;
- case GZP_CMD_KEY_UPDATE_PREPARE:
- gzp_process_key_update_prepare();
- break;
- case GZP_CMD_KEY_UPDATE:
- gzp_process_key_update(rx_payload);
- break;
- case GZP_CMD_ENCRYPTED_USER_DATA:
- gzp_process_encrypted_user_data(rx_payload, payload_length);
- break;
- #endif
- case GZP_CMD_FETCH_RESP:
- default:
- break;
- }
- }
-
- if (!nrf_gzll_is_enabled())
- {
- gzll_set_rx_timeout(0);
- if (gzp_pairing_enabled_f)
- {
- (void)nrf_gzll_set_rx_pipes_enabled(nrf_gzll_get_rx_pipes_enabled() | (1 << GZP_PAIRING_PIPE));
- }
- gzll_rx_start();
- }
- #ifndef GZP_CRYPT_DISABLE
- gzp_session_counter_inc();
- #endif
- }
- void gzll_rx_start(void)
- {
- if (nrf_gzll_get_mode() != NRF_GZLL_MODE_HOST)
- {
- gzll_goto_idle();
- (void)nrf_gzll_set_mode(NRF_GZLL_MODE_HOST);
- }
- if (!nrf_gzll_is_enabled())
- {
- (void)nrf_gzll_enable();
- }
- }
- bool gzp_id_req_received()
- {
- return (gzp_id_req_stat != GZP_ID_REQ_IDLE);
- }
- void gzp_id_req_reject()
- {
- if (gzp_id_req_received())
- {
- gzp_id_req_stat = GZP_ID_REQ_PENDING_AND_REJECTED;
- }
- }
- void gzp_id_req_grant()
- {
- if (gzp_id_req_received())
- {
- gzp_id_req_stat = GZP_ID_REQ_PENDING_AND_GRANTED;
- }
- }
- void gzp_id_req_cancel()
- {
- if (gzp_id_req_received())
- {
- gzp_id_req_stat = GZP_ID_REQ_IDLE;
- }
- }
- static void gzp_process_address_req(uint8_t* gzp_req)
- {
- uint8_t temp_rx_pipes;
- uint8_t pairing_resp[GZP_CMD_HOST_ADDRESS_RESP_PAYLOAD_LENGTH];
- uint32_t rx_payload_length = NRF_GZLL_CONST_MAX_PAYLOAD_LENGTH;
- gzp_address_exchanged_f = false;
- gzll_goto_idle();
- ASSERT(nrf_gzll_get_error_code() == NRF_GZLL_ERROR_CODE_NO_ERROR);
- temp_rx_pipes = nrf_gzll_get_rx_pipes_enabled();
- ASSERT(nrf_gzll_get_error_code() == NRF_GZLL_ERROR_CODE_NO_ERROR);
-
- if (prev_gzp_rx_info.rssi >= GZP_HOST_RX_POWER_THRESHOLD)
- {
- (void)nrf_gzll_set_rx_pipes_enabled(0);
- ASSERT(nrf_gzll_get_error_code() == NRF_GZLL_ERROR_CODE_NO_ERROR);
- gzll_set_rx_timeout(GZP_CLOSE_PROXIMITY_BACKOFF_RX_TIMEOUT);
- ASSERT(nrf_gzll_get_error_code() == NRF_GZLL_ERROR_CODE_NO_ERROR);
- gzll_rx_fifo_flush();
- ASSERT(nrf_gzll_get_error_code() == NRF_GZLL_ERROR_CODE_NO_ERROR);
-
- gzll_rx_start();
- ASSERT(nrf_gzll_get_error_code() == NRF_GZLL_ERROR_CODE_NO_ERROR);
- while (nrf_gzll_is_enabled())
- {}
-
- pairing_resp[0] = (uint8_t)GZP_CMD_HOST_ADDRESS_RESP;
- gzp_host_chip_id_read(&pairing_resp[GZP_CMD_HOST_ADDRESS_RESP_ADDRESS], GZP_SYSTEM_ADDRESS_WIDTH);
- (void)nrf_gzll_add_packet_to_tx_fifo(0, &pairing_resp[0], GZP_CMD_HOST_ADDRESS_RESP_PAYLOAD_LENGTH);
- ASSERT(nrf_gzll_get_error_code() == NRF_GZLL_ERROR_CODE_NO_ERROR);
- gzll_set_rx_timeout(GZP_STEP1_RX_TIMEOUT);
-
- (void)nrf_gzll_set_rx_pipes_enabled((1 << GZP_PAIRING_PIPE));
- gzll_rx_start();
- while (nrf_gzll_is_enabled())
- {
- if (nrf_gzll_get_rx_fifo_packet_count(GZP_PAIRING_PIPE))
- {
- (void)nrf_gzll_fetch_packet_from_rx_fifo(GZP_PAIRING_PIPE, &gzp_req[0], &rx_payload_length);
-
- if (gzp_req[0] == (uint8_t)GZP_CMD_HOST_ADDRESS_FETCH)
- {
- gzp_address_exchanged_f = true;
- }
- }
- }
- gzll_tx_fifo_flush();
- gzll_rx_fifo_flush();
- gzll_set_rx_timeout(0);
- (void)nrf_gzll_set_rx_pipes_enabled(temp_rx_pipes);
-
- gzll_rx_start();
- }
- else
- {
- (void)nrf_gzll_set_rx_pipes_enabled(temp_rx_pipes & ~(1 << GZP_PAIRING_PIPE));
- gzll_set_rx_timeout(GZP_NOT_PROXIMITY_BACKOFF_RX_TIMEOUT);
-
- gzll_rx_start();
- }
- }
- static void gzp_preload_ack(uint8_t* src, uint8_t length, uint8_t pipe)
- {
- gzll_goto_idle();
- gzll_tx_fifo_flush();
- (void)nrf_gzll_add_packet_to_tx_fifo(pipe, src, length);
- gzll_rx_start();
- }
- static void gzll_set_rx_timeout(uint32_t timeout)
- {
- timeout *= 2;
- nrf_gzll_set_auto_disable(timeout);
- }
- bool gzp_address_exchanged()
- {
- return gzp_address_exchanged_f;
- }
- #ifndef GZP_CRYPT_DISABLE
- bool gzp_crypt_user_data_received()
- {
- return (gzp_encrypted_user_data_length > 0);
- }
- bool gzp_crypt_user_data_read(uint8_t* dst, uint8_t* length)
- {
- if (gzp_encrypted_user_data_length > 0)
- {
- memcpy(dst, (void*)gzp_encrypted_user_data, gzp_encrypted_user_data_length);
- if (length != NULL)
- {
- *length = gzp_encrypted_user_data_length;
- }
- gzp_encrypted_user_data_length = 0;
- return true;
- }
- else
- {
- return false;
- }
- }
- static void gzp_session_counter_inc()
- {
- uint8_t i;
- for (i = 0; i < GZP_SESSION_TOKEN_LENGTH; i++)
- {
- gzp_session_counter[i]++;
- if (gzp_session_counter[i] != 0)
- {
- break;
- }
- }
- }
- static void gzp_get_session_counter(uint8_t* dst)
- {
- memcpy(dst, (void*)gzp_session_counter, GZP_SESSION_TOKEN_LENGTH);
- }
- static void gzp_set_host_id(const uint8_t* src)
- {
- if (*((uint8_t*)database) == 0xff)
- {
- nrf_nvmc_write_bytes(GZP_PARAMS_STORAGE_ADR + 1, src, GZP_HOST_ID_LENGTH);
- nrf_nvmc_write_byte(GZP_PARAMS_STORAGE_ADR, 0x00);
- }
- }
- void gzp_get_host_id(uint8_t *dst)
- {
- memcpy(dst, (uint8_t*)GZP_PARAMS_STORAGE_ADR + 1, GZP_HOST_ID_LENGTH);
- }
- static void gzp_process_id_req(uint8_t* rx_payload)
- {
- int i;
- uint8_t temp_host_id[GZP_HOST_ID_LENGTH];
- if (gzp_pairing_enabled_f)
- {
- if (!gzp_id_req_received())
- {
- gzp_crypt_set_session_token(&rx_payload[GZP_CMD_HOST_ID_REQ_SESSION_TOKEN]);
- gzp_id_req_stat = GZP_ID_REQ_PENDING;
- }
- gzp_get_host_id(temp_host_id);
-
- for (i = 0; i < GZP_HOST_ID_LENGTH; i++)
- {
- if (temp_host_id[i] != 0xFF)
- {
- break;
- }
- }
- if (i == GZP_HOST_ID_LENGTH)
- {
- gzp_get_session_counter(temp_host_id);
- #if (GZP_HOST_ID_LENGTH > GZP_SESSION_TOKEN_LENGTH)
- gzp_xor_cipher(temp_host_id, temp_host_id, &rx_payload[GZP_CMD_HOST_ID_REQ_SESSION_TOKEN], GZP_SESSION_TOKEN_LENGTH);
- #else
- gzp_xor_cipher(temp_host_id, temp_host_id, &rx_payload[GZP_CMD_HOST_ID_REQ_SESSION_TOKEN], GZP_HOST_ID_LENGTH);
- #endif
- gzp_set_host_id(temp_host_id);
- }
- }
- }
- static void gzp_process_id_fetch(uint8_t* rx_payload)
- {
- uint8_t tx_payload[GZP_CMD_HOST_ID_FETCH_RESP_PAYLOAD_LENGTH];
- if (gzp_id_req_received())
- {
- gzp_crypt_select_key(GZP_ID_EXCHANGE);
- gzp_crypt(&rx_payload[1], &rx_payload[1], GZP_CMD_HOST_ID_FETCH_PAYLOAD_LENGTH - 1);
- if (gzp_validate_id(&rx_payload[GZP_CMD_HOST_ID_FETCH_VALIDATION_ID]))
- {
- switch (gzp_id_req_stat)
- {
- case GZP_ID_REQ_PENDING_AND_GRANTED:
- tx_payload[GZP_CMD_HOST_ID_FETCH_RESP_STATUS] = (uint8_t)GZP_ID_RESP_GRANTED;
- gzp_get_host_id(&tx_payload[GZP_CMD_HOST_ID_FETCH_RESP_HOST_ID]);
- gzp_id_req_stat = GZP_ID_REQ_IDLE;
- break;
- case GZP_ID_REQ_PENDING_AND_REJECTED:
- tx_payload[GZP_CMD_HOST_ID_FETCH_RESP_STATUS] = (uint8_t)GZP_ID_RESP_REJECTED;
- gzp_id_req_stat = GZP_ID_REQ_IDLE;
- break;
- case GZP_ID_REQ_PENDING:
- default:
- tx_payload[GZP_CMD_HOST_ID_FETCH_RESP_STATUS] = (uint8_t)GZP_ID_RESP_PENDING;
- break;
- }
- tx_payload[0] = (uint8_t)GZP_CMD_HOST_ID_FETCH_RESP;
- gzp_add_validation_id(&tx_payload[GZP_CMD_HOST_ID_FETCH_RESP_VALIDATION_ID]);
- gzp_crypt(&tx_payload[1], &tx_payload[1], GZP_CMD_HOST_ID_FETCH_RESP_PAYLOAD_LENGTH - 1);
- ASSERT(nrf_gzll_get_error_code() == NRF_GZLL_ERROR_CODE_NO_ERROR);
- gzp_preload_ack(tx_payload, GZP_CMD_HOST_ID_FETCH_RESP_PAYLOAD_LENGTH, GZP_DATA_PIPE);
- ASSERT(nrf_gzll_get_error_code() == NRF_GZLL_ERROR_CODE_NO_ERROR);
- }
- }
- }
- static void gzp_process_key_update_prepare()
- {
- uint8_t tx_payload[GZP_CMD_KEY_UPDATE_PREPARE_RESP_PAYLOAD_LENGTH];
- tx_payload[0] = (uint8_t)GZP_CMD_KEY_UPDATE_PREPARE_RESP;
- gzp_get_session_counter(&tx_payload[GZP_CMD_KEY_UPDATE_PREPARE_RESP_SESSION_TOKEN]);
-
- if (!gzp_id_req_received())
- {
- gzp_crypt_set_session_token(&tx_payload[GZP_CMD_KEY_UPDATE_PREPARE_RESP_SESSION_TOKEN]);
- }
- gzp_preload_ack(tx_payload, GZP_CMD_KEY_UPDATE_PREPARE_RESP_PAYLOAD_LENGTH, GZP_DATA_PIPE);
- ASSERT(nrf_gzll_get_error_code() == NRF_GZLL_ERROR_CODE_NO_ERROR);
- }
- static void gzp_process_key_update(uint8_t* rx_payload)
- {
- gzp_crypt_select_key(GZP_KEY_EXCHANGE);
- gzp_crypt(&rx_payload[1], &rx_payload[1], GZP_CMD_KEY_UPDATE_PAYLOAD_LENGTH - 1);
- if (gzp_validate_id(&rx_payload[GZP_CMD_KEY_UPDATE_VALIDATION_ID]))
- {
- gzp_crypt_set_dyn_key(&rx_payload[GZP_CMD_KEY_UPDATE_NEW_KEY]);
- }
- }
- static void gzp_process_encrypted_user_data(uint8_t* rx_payload, uint8_t length)
- {
- uint8_t tx_payload[GZP_CMD_ENCRYPTED_USER_DATA_RESP_PAYLOAD_LENGTH];
- if (gzp_id_req_received())
- {
- gzp_crypt_select_key(GZP_ID_EXCHANGE);
- }
- else
- {
- gzp_crypt_select_key(GZP_DATA_EXCHANGE);
- }
- gzp_crypt(&rx_payload[1], &rx_payload[1], length - 1);
- if (gzp_validate_id(&rx_payload[GZP_CMD_ENCRYPTED_USER_DATA_VALIDATION_ID]))
- {
- gzp_encrypted_user_data_length = length - GZP_ENCRYPTED_USER_DATA_PACKET_OVERHEAD;
- memcpy((void*)gzp_encrypted_user_data, &rx_payload[GZP_CMD_ENCRYPTED_USER_DATA_PAYLOAD], gzp_encrypted_user_data_length);
- }
-
- tx_payload[0] = (uint8_t)GZP_CMD_ENCRYPTED_USER_DATA_RESP;
- gzp_add_validation_id(&tx_payload[GZP_CMD_ENCRYPTED_USER_DATA_RESP_VALIDATION_ID]);
- gzp_crypt(&tx_payload[GZP_CMD_ENCRYPTED_USER_DATA_RESP_VALIDATION_ID], &tx_payload[GZP_CMD_ENCRYPTED_USER_DATA_RESP_VALIDATION_ID], GZP_VALIDATION_ID_LENGTH);
- gzp_get_session_counter(&tx_payload[GZP_CMD_ENCRYPTED_USER_DATA_RESP_SESSION_TOKEN]);
-
- if (!gzp_id_req_received())
- {
- gzp_crypt_set_session_token(&tx_payload[GZP_CMD_ENCRYPTED_USER_DATA_RESP_SESSION_TOKEN]);
- }
- ASSERT(nrf_gzll_get_error_code() == NRF_GZLL_ERROR_CODE_NO_ERROR);
- gzp_preload_ack(tx_payload, GZP_CMD_ENCRYPTED_USER_DATA_RESP_PAYLOAD_LENGTH, GZP_DATA_PIPE);
- ASSERT(nrf_gzll_get_error_code() == NRF_GZLL_ERROR_CODE_NO_ERROR);
- }
- static void gzll_goto_idle()
- {
- nrf_gzll_disable();
- while (nrf_gzll_is_enabled())
- {}
- }
- static void gzll_tx_fifo_flush(void)
- {
- int i;
- for (i = 0; i < NRF_GZLL_CONST_PIPE_COUNT; i++)
- {
- (void)nrf_gzll_flush_tx_fifo(i);
- }
- }
- static void gzll_rx_fifo_flush(void)
- {
- int i;
- for (i = 0; i < NRF_GZLL_CONST_PIPE_COUNT; i++)
- {
- (void)nrf_gzll_flush_rx_fifo(i);
- }
- }
- void nrf_gzll_device_tx_failed(uint32_t pipe, nrf_gzll_device_tx_info_t tx_info)
- {
- }
- void nrf_gzll_device_tx_success(uint32_t pipe, nrf_gzll_device_tx_info_t tx_info)
- {
- }
- void nrf_gzll_disabled(void)
- {
- }
- void nrf_gzll_host_rx_data_ready(uint32_t pipe, nrf_gzll_host_rx_info_t rx_info)
- {
- if (pipe == GZP_PAIRING_PIPE)
- {
- prev_gzp_rx_info = rx_info;
- }
- }
- #endif
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