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_USER_DATA_PACKET_OVERHEAD; memcpy((void*)gzp_encrypted_user_data, &rx_payload[GZP_CMD_ENCRYPTED_USER_DATA_PAYLOAD], gzp_encrypted_user_data_length); } // Build response packet tx_payload[0] = 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]); // Update "session token" only if no ID request is pending if(!gzp_id_req_received()) { gzp_crypt_set_session_token(&tx_payload[GZP_CMD_ENCRYPTED_USER_DATA_RESP_SESSION_TOKEN]); } gzp_preload_ack(tx_payload, GZP_CMD_ENCRYPTED_USER_DATA_RESP_PAYLOAD_LENGTH, GZP_DATA_PIPE); }
static void gzp_process_id_req(uint8_t* rx_payload) { 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; } // If host ID not generated yet if(!gzp_get_host_id(temp_host_id)) { // Generate new host ID from "session counter" and received "session token" 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); } gzp_set_host_id(temp_host_id); } } }
static void gzp_process_key_update_prepare() { uint8_t tx_payload[GZP_CMD_KEY_UPDATE_PREPARE_RESP_PAYLOAD_LENGTH]; tx_payload[0] = GZP_CMD_KEY_UPDATE_PREPARE_RESP; gzp_get_session_counter(&tx_payload[GZP_CMD_KEY_UPDATE_PREPARE_RESP_SESSION_TOKEN]); // Update session token if no ID request is pending 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); }
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]); // Update session token if no ID request is pending 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_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); // Added: for(i = 0; i < GZP_HOST_ID_LENGTH; i++) { if(temp_host_id[i] != 0xFF) { break; } } if(i == GZP_HOST_ID_LENGTH) // If host not generated yet { gzp_get_session_counter(temp_host_id); //lint -save -e506 Constantvalue Boolean if(GZP_HOST_ID_LENGTH > GZP_SESSION_TOKEN_LENGTH) { //lint -restore 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); } gzp_set_host_id(temp_host_id); } } }