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WIP: totp watch face read from file

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This commit is contained in:
Joey Castillo
2022-05-12 10:41:04 -04:00
parent ed526355f6
commit cc4275694b
6 changed files with 348 additions and 16 deletions
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69
movement/watch_faces/complication/totp_face.c
View File

@@ -8,28 +8,57 @@
#include "watch.h"
#include "watch_utility.h"
#include "TOTP.h"
#include "base32.h"
#include "filesystem.h"
// test key: JBSWY3DPEHPK3PXP
// Use https://cryptii.com/pipes/base32-to-hex to convert base32 to hex
// Use https://totp.danhersam.com/ to generate test codes for verification
static uint8_t hmacKey[] = {0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x21, 0xde, 0xad, 0xbe, 0xef}; // Secret key
static uint8_t last_filename_index = 0;
static const uint32_t TIMESTEP = 30;
static void read_totp_file(totp_state_t *totp_state) {
totp_state->valid = false;
char filename[12];
sprintf(filename, "totp%d.txt", totp_state->my_filename_index);
int32_t size = filesystem_get_file_size(filename);
if (size > 0) {
char *buf = malloc(size + 1);
filesystem_read_file(filename, buf, size);
char *site_name = strtok(buf, " \n");
char *hmac_string = strtok(NULL, " \n");
if (strlen(hmac_string) == 16) {
memcpy(totp_state->site_name, site_name, min(strlen(site_name), 2));
base32_decode(hmac_string, totp_state->hmac_key);
totp_state->valid = true;
}
free(buf);
}
}
void totp_face_setup(movement_settings_t *settings, uint8_t watch_face_index, void ** context_ptr) {
(void) settings;
(void) watch_face_index;
if (*context_ptr == NULL) *context_ptr = malloc(sizeof(totp_state_t));
TOTP(hmacKey, sizeof(hmacKey), TIMESTEP);
if (*context_ptr == NULL) {
*context_ptr = malloc(sizeof(totp_state_t));
(((totp_state_t *)(*context_ptr))->my_filename_index) = ++last_filename_index;
read_totp_file((totp_state_t *)(*context_ptr));
}
}
void totp_face_activate(movement_settings_t *settings, void *context) {
(void) settings;
memset(context, 0, sizeof(totp_state_t));
totp_state_t *totp_state = (totp_state_t *)context;
totp_state->timestamp = watch_utility_date_time_to_unix_time(watch_rtc_get_date_time(), movement_timezone_offsets[settings->bit.time_zone] * 60);
totp_state->current_code = getCodeFromTimestamp(totp_state->timestamp);
if (!totp_state->valid) {
read_totp_file(totp_state);
}
if (totp_state->valid) {
TOTP(totp_state->hmac_key, sizeof(totp_state->hmac_key), TIMESTEP);
totp_state->steps = 0;
totp_state->timestamp = watch_utility_date_time_to_unix_time(watch_rtc_get_date_time(), movement_timezone_offsets[settings->bit.time_zone] * 60);
totp_state->current_code = getCodeFromTimestamp(totp_state->timestamp);
}
}
bool totp_face_loop(movement_event_t event, movement_settings_t *settings, void *context) {
@@ -45,15 +74,25 @@ bool totp_face_loop(movement_event_t event, movement_settings_t *settings, void
totp_state->timestamp++;
// fall through
case EVENT_ACTIVATE:
result = div(totp_state->timestamp, TIMESTEP);
if (result.quot != totp_state->steps) {
totp_state->current_code = getCodeFromTimestamp(totp_state->timestamp);
totp_state->steps = result.quot;
if (totp_state->valid) {
result = div(totp_state->timestamp, TIMESTEP);
if (result.quot != totp_state->steps) {
totp_state->current_code = getCodeFromTimestamp(totp_state->timestamp);
totp_state->steps = result.quot;
}
valid_for = TIMESTEP - result.rem;
sprintf(buf, "%s%2d%06lu", totp_state->site_name, valid_for, totp_state->current_code);
watch_display_string(buf, 0);
} else {
watch_display_string("2f noCode", 0);
read_totp_file(totp_state);
if (totp_state->valid) {
TOTP(totp_state->hmac_key, sizeof(totp_state->hmac_key), TIMESTEP);
totp_state->steps = 0;
totp_state->timestamp = watch_utility_date_time_to_unix_time(watch_rtc_get_date_time(), movement_timezone_offsets[settings->bit.time_zone] * 60);
totp_state->current_code = getCodeFromTimestamp(totp_state->timestamp);
}
}
valid_for = TIMESTEP - result.rem;
sprintf(buf, "2f%2d%06lu", valid_for, totp_state->current_code);
watch_display_string(buf, 0);
break;
case EVENT_MODE_BUTTON_UP:
movement_move_to_next_face();

5
movement/watch_faces/complication/totp_face.h
View File

@@ -4,10 +4,13 @@
#include "movement.h"
typedef struct {
char site_name[3];
uint8_t hmac_key[10];
uint32_t timestamp;
uint8_t steps;
uint32_t current_code;
uint8_t my_filename_index;
bool valid;
} totp_state_t;
void totp_face_setup(movement_settings_t *settings, uint8_t watch_face_index, void ** context_ptr);