/**
* @brief Initialize the CPU, the board and the peripherals
*
* This function is called by ESP8266 SDK when all system initializations
* has been finished.
*/
void system_init(void)
{
LOG_INFO("\nStarting ESP8266 CPU with ID: %08x", system_get_chip_id());
LOG_INFO("\nSDK Version %s\n\n", system_get_sdk_version());
/* avoid reconnection all the time */
wifi_station_disconnect();
/* set exception handlers */
init_exceptions ();
/* init random number generator */
srand(hwrand());
/* init flash drive */
extern void flash_drive_init (void);
flash_drive_init();
/* trigger static peripheral initialization */
periph_init();
/* trigger board initialization */
board_init();
/* print the board config */
board_print_config();
}
static void rand_get_seed(struct rand_state *state,
uint8_t seed[CTR_DRBG_ENTROPY_LEN]) {
if (!state->last_block_valid) {
if (!hwrand(state->last_block, sizeof(state->last_block))) {
CRYPTO_sysrand(state->last_block, sizeof(state->last_block));
}
state->last_block_valid = 1;
}
// We overread from /dev/urandom or RDRAND by a factor of 10 and XOR to
// whiten.
#define FIPS_OVERREAD 10
uint8_t entropy[CTR_DRBG_ENTROPY_LEN * FIPS_OVERREAD];
if (!hwrand(entropy, sizeof(entropy))) {
CRYPTO_sysrand(entropy, sizeof(entropy));
}
// See FIPS 140-2, section 4.9.2. This is the “continuous random number
// generator test” which causes the program to randomly abort. Hopefully the
// rate of failure is small enough not to be a problem in practice.
if (CRYPTO_memcmp(state->last_block, entropy, CRNGT_BLOCK_SIZE) == 0) {
fprintf(stderr, "CRNGT failed.\n");
BORINGSSL_FIPS_abort();
}
for (size_t i = CRNGT_BLOCK_SIZE; i < sizeof(entropy);
i += CRNGT_BLOCK_SIZE) {
if (CRYPTO_memcmp(entropy + i - CRNGT_BLOCK_SIZE, entropy + i,
CRNGT_BLOCK_SIZE) == 0) {
fprintf(stderr, "CRNGT failed.\n");
BORINGSSL_FIPS_abort();
}
}
OPENSSL_memcpy(state->last_block,
entropy + sizeof(entropy) - CRNGT_BLOCK_SIZE,
CRNGT_BLOCK_SIZE);
OPENSSL_memcpy(seed, entropy, CTR_DRBG_ENTROPY_LEN);
for (size_t i = 1; i < FIPS_OVERREAD; i++) {
for (size_t j = 0; j < CTR_DRBG_ENTROPY_LEN; j++) {
seed[j] ^= entropy[CTR_DRBG_ENTROPY_LEN * i + j];
}
}
}
void RAND_bytes_with_additional_data(uint8_t *out, size_t out_len,
const uint8_t user_additional_data[32]) {
if (out_len == 0) {
return;
}
// Additional data is mixed into every CTR-DRBG call to protect, as best we
// can, against forks & VM clones. We do not over-read this information and
// don't reseed with it so, from the point of view of FIPS, this doesn't
// provide “prediction resistance”. But, in practice, it does.
uint8_t additional_data[32];
if (!hwrand(additional_data, sizeof(additional_data))) {
// Without a hardware RNG to save us from address-space duplication, the OS
// entropy is used. This can be expensive (one read per |RAND_bytes| call)
// and so can be disabled by applications that we have ensured don't fork
// and aren't at risk of VM cloning.
if (!rand_fork_unsafe_buffering_enabled()) {
CRYPTO_sysrand(additional_data, sizeof(additional_data));
} else {
OPENSSL_memset(additional_data, 0, sizeof(additional_data));
}
}
for (size_t i = 0; i < sizeof(additional_data); i++) {
additional_data[i] ^= user_additional_data[i];
}
struct rand_state stack_state;
struct rand_state *state = rand_state_get();
if (state == NULL) {
// If the system is out of memory, use an ephemeral state on the
// stack.
state = &stack_state;
rand_state_init(state);
}
if (state->calls >= kReseedInterval) {
uint8_t seed[CTR_DRBG_ENTROPY_LEN];
rand_get_seed(state, seed);
#if defined(BORINGSSL_FIPS)
// Take a read lock around accesses to |state->drbg|. This is needed to
// avoid returning bad entropy if we race with
// |rand_state_clear_all|.
//
// This lock must be taken after any calls to |CRYPTO_sysrand| to avoid a
// bug on ppc64le. glibc may implement pthread locks by wrapping user code
// in a hardware transaction, but, on some older versions of glibc and the
// kernel, syscalls made with |syscall| did not abort the transaction.
CRYPTO_STATIC_MUTEX_lock_read(rand_drbg_lock_bss_get());
#endif
if (!CTR_DRBG_reseed(&state->drbg, seed, NULL, 0)) {
abort();
}
state->calls = 0;
} else {
#if defined(BORINGSSL_FIPS)
CRYPTO_STATIC_MUTEX_lock_read(rand_drbg_lock_bss_get());
#endif
}
int first_call = 1;
while (out_len > 0) {
size_t todo = out_len;
if (todo > CTR_DRBG_MAX_GENERATE_LENGTH) {
todo = CTR_DRBG_MAX_GENERATE_LENGTH;
}
if (!CTR_DRBG_generate(&state->drbg, out, todo, additional_data,
first_call ? sizeof(additional_data) : 0)) {
abort();
}
out += todo;
out_len -= todo;
state->calls++;
first_call = 0;
}
if (state == &stack_state) {
CTR_DRBG_clear(&state->drbg);
}
#if defined(BORINGSSL_FIPS)
CRYPTO_STATIC_MUTEX_unlock_read(rand_drbg_lock_bss_get());
#endif
if (state != &stack_state) {
rand_state_put(state);
}
}
int RAND_bytes(uint8_t *buf, size_t len) {
if (len == 0) {
return 1;
}
if (!hwrand(buf, len)) {
/* Without a hardware RNG to save us from address-space duplication, the OS
* entropy is used directly. */
CRYPTO_sysrand(buf, len);
return 1;
}
struct rand_thread_state *state =
CRYPTO_get_thread_local(OPENSSL_THREAD_LOCAL_RAND);
if (state == NULL) {
state = OPENSSL_malloc(sizeof(struct rand_thread_state));
if (state == NULL ||
!CRYPTO_set_thread_local(OPENSSL_THREAD_LOCAL_RAND, state,
rand_thread_state_free)) {
CRYPTO_sysrand(buf, len);
return 1;
}
memset(state->partial_block, 0, sizeof(state->partial_block));
state->calls_used = kMaxCallsPerRefresh;
}
if (state->calls_used >= kMaxCallsPerRefresh ||
state->bytes_used >= kMaxBytesPerRefresh) {
CRYPTO_sysrand(state->key, sizeof(state->key));
state->calls_used = 0;
state->bytes_used = 0;
state->partial_block_used = sizeof(state->partial_block);
}
if (len >= sizeof(state->partial_block)) {
size_t remaining = len;
while (remaining > 0) {
/* kMaxBytesPerCall is only 2GB, while ChaCha can handle 256GB. But this
* is sufficient and easier on 32-bit. */
static const size_t kMaxBytesPerCall = 0x80000000;
size_t todo = remaining;
if (todo > kMaxBytesPerCall) {
todo = kMaxBytesPerCall;
}
uint8_t nonce[12];
memset(nonce, 0, 4);
memcpy(nonce + 4, &state->calls_used, sizeof(state->calls_used));
CRYPTO_chacha_20(buf, buf, todo, state->key, nonce, 0);
buf += todo;
remaining -= todo;
state->calls_used++;
}
} else {
if (sizeof(state->partial_block) - state->partial_block_used < len) {
uint8_t nonce[12];
memset(nonce, 0, 4);
memcpy(nonce + 4, &state->calls_used, sizeof(state->calls_used));
CRYPTO_chacha_20(state->partial_block, state->partial_block,
sizeof(state->partial_block), state->key, nonce, 0);
state->partial_block_used = 0;
}
unsigned i;
for (i = 0; i < len; i++) {
buf[i] ^= state->partial_block[state->partial_block_used++];
}
state->calls_used++;
}
state->bytes_used += len;
return 1;
}
uint32_t homekit_random() {
return hwrand();
}
uint_t random()
{
return hwrand();
}
void user_init(void) {
uart_set_baud(0, 921600);
printf("\n\nESP8266 UMAC\n\n");
bridge_init();
umac_cfg um_cfg = {
.timer_fn = umac_impl_request_future_tick,
.cancel_timer_fn = umac_impl_cancel_future_tick,
.now_fn = umac_impl_now_tick,
.tx_byte_fn = umac_impl_tx_byte,
.tx_buf_fn = umac_impl_tx_buf,
.rx_pkt_fn = umac_impl_rx_pkt,
.rx_pkt_ack_fn = bridge_pkt_acked,
.timeout_fn = bridge_timeout,
.nonprotocol_data_fn = NULL
};
umac_init(&um, &um_cfg, rx_buf);
um_tim_hdl = xTimerCreate(
(signed char *)"umac_tim",
10,
false,
(void *)um_tim_id, um_tim_cb);
char ap_cred[128];
struct sdk_station_config config;
bool setup_ap = true;
systask_init();
device_id = 0;
fs_init();
if (fs_mount() >= 0) {
#if 0
spiffs_DIR d;
struct spiffs_dirent e;
struct spiffs_dirent *pe = &e;
fs_opendir("/", &d);
while ((pe = fs_readdir(&d, pe))) {
printf("%s [%04x] size:%i\n", pe->name, pe->obj_id, pe->size);
}
fs_closedir(&d);
#endif
// read preferred ssid
spiffs_file fd_ssid = fs_open(".ssid", SPIFFS_RDONLY, 0);
if (fd_ssid > 0) {
if (fs_read(fd_ssid, (uint8_t *)ap_cred, sizeof(ap_cred)) > 0) {
fs_close(fd_ssid);
char *nl_ix = strchr(ap_cred, '\n');
if (nl_ix > 0) {
memset(&config, 0, sizeof(struct sdk_station_config));
strncpy((char *)&config.ssid, ap_cred, nl_ix - ap_cred);
char *nl_ix2 = strchr(nl_ix + 1, '\n');
if (nl_ix2 > 0) {
strncpy((char *)&config.password, nl_ix + 1, nl_ix2 - (nl_ix + 1));
setup_ap = false;
}
}
printf("ssid:%s\n", config.ssid);
} // if read
else {
printf("could not read .ssid\n");
}
} // if fs_ssid
else {
printf("no .ssid found, running softAP\n");
}
// find device id or create one
spiffs_file fd_devid = fs_open(".devid", SPIFFS_RDONLY, 0);
if (fd_devid < 0) {
device_id = hwrand();
fd_devid = fs_open(".devid", SPIFFS_O_CREAT | SPIFFS_O_TRUNC | SPIFFS_O_WRONLY | SPIFFS_O_APPEND, 0);
fs_write(fd_devid, &device_id, 4);
printf("create devid\n");
} else {
fs_read(fd_devid, &device_id, 4);
}
fs_close(fd_devid);
printf("devid %08x\n", device_id);
// remove previous scan results
fs_remove(SYSTASK_AP_SCAN_FILENAME);
} // if mount
if (setup_ap) {
sdk_wifi_set_opmode(SOFTAP_MODE);
struct ip_info ap_ip;
IP4_ADDR(&ap_ip.ip, 192, 169, 1, 1);
IP4_ADDR(&ap_ip.gw, 0, 0, 0, 0);
IP4_ADDR(&ap_ip.netmask, 255, 255, 255, 0);
sdk_wifi_set_ip_info(1, &ap_ip);
struct sdk_softap_config ap_cfg = {
.ssid = "WISLEEP",
.password = "",
.ssid_len = 7,
.channel = 1,
.authmode = AUTH_OPEN,
.ssid_hidden = false,
.max_connection = 255,
.beacon_interval = 100
};
sdk_wifi_softap_set_config(&ap_cfg);
ip_addr_t first_client_ip;
IP4_ADDR(&first_client_ip, 192, 169, 1, 100);
dhcpserver_start(&first_client_ip, 4);
} else {
// required to call wifi_set_opmode before station_set_config
sdk_wifi_set_opmode(STATION_MODE);
sdk_wifi_station_set_config(&config);
}
server_init(server_actions);
um_mutex = xSemaphoreCreateMutex();
xTaskCreate(uart_task, (signed char * )"uart_task", 512, NULL, 2, NULL);
xTaskCreate(server_task, (signed char *)"server_task", 1024, NULL, 2, NULL);
}