81 lines
2.5 KiB
C
81 lines
2.5 KiB
C
/**
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* TODO:
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* - Support for multiple codes
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*/
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#include <stdlib.h>
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#include <string.h>
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#include "totp_face.h"
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#include "watch.h"
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#include "watch_utility.h"
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#include "TOTP.h"
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// test key: JBSWY3DPEHPK3PXP
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// Use https://cryptii.com/pipes/base32-to-hex to convert base32 to hex
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// Use https://totp.danhersam.com/ to generate test codes for verification
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static uint8_t hmacKey[] = {0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x21, 0xde, 0xad, 0xbe, 0xef}; // Secret key
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static const uint32_t TIMESTEP = 30;
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void totp_face_setup(movement_settings_t *settings, uint8_t watch_face_index, void ** context_ptr) {
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(void) settings;
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(void) watch_face_index;
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if (*context_ptr == NULL) *context_ptr = malloc(sizeof(totp_state_t));
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TOTP(hmacKey, sizeof(hmacKey), TIMESTEP);
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}
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void totp_face_activate(movement_settings_t *settings, void *context) {
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(void) settings;
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memset(context, 0, sizeof(totp_state_t));
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totp_state_t *totp_state = (totp_state_t *)context;
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totp_state->timestamp = watch_utility_date_time_to_unix_time(watch_rtc_get_date_time(), movement_timezone_offsets[settings->bit.time_zone] * 60);
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totp_state->current_code = getCodeFromTimestamp(totp_state->timestamp);
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}
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bool totp_face_loop(movement_event_t event, movement_settings_t *settings, void *context) {
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(void) settings;
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totp_state_t *totp_state = (totp_state_t *)context;
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char buf[14];
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uint8_t valid_for;
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div_t result;
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switch (event.event_type) {
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case EVENT_TICK:
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totp_state->timestamp++;
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// fall through
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case EVENT_ACTIVATE:
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result = div(totp_state->timestamp, TIMESTEP);
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if (result.quot != totp_state->steps) {
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totp_state->current_code = getCodeFromTimestamp(totp_state->timestamp);
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totp_state->steps = result.quot;
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}
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valid_for = TIMESTEP - result.rem;
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sprintf(buf, "2f%2d%06lu", valid_for, totp_state->current_code);
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watch_display_string(buf, 0);
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break;
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case EVENT_MODE_BUTTON_UP:
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movement_move_to_next_face();
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break;
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case EVENT_LIGHT_BUTTON_DOWN:
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movement_illuminate_led();
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break;
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case EVENT_TIMEOUT:
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movement_move_to_face(0);
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break;
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case EVENT_ALARM_BUTTON_DOWN:
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case EVENT_ALARM_BUTTON_UP:
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case EVENT_ALARM_LONG_PRESS:
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default:
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break;
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}
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return true;
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}
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void totp_face_resign(movement_settings_t *settings, void *context) {
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(void) settings;
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(void) context;
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}
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