140 lines
5.0 KiB
C
140 lines
5.0 KiB
C
/*
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* MIT License
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*
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* Copyright (c) 2022 Wesley Ellis (https://github.com/tahnok)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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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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typedef struct {
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unsigned char labels[2];
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hmac_alg algorithm;
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uint32_t period;
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size_t key_length;
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uint8_t *key;
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} totp_t;
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#define TOTP_INITIALIZER(label_1, label_2, key_array, algo, timestep) \
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(const totp_t) { \
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.key = (key_array), \
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.key_length = sizeof(key_array), \
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.period = (timestep), \
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.labels = { (label_1), (label_2) }, \
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.algorithm = (algo), \
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}
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////////////////////////////////////////////////////////////////////////////////
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// Enter your TOTP key data below
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static uint8_t key_1[] = {
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0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x21, 0xde, 0xad, 0xbe, 0xef, // 1 - JBSWY3DPEHPK3PXP
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};
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static uint8_t key_2[] = {
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0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x21, 0xde, 0xad, 0xbe, 0xef, // 2 - JBSWY3DPEHPK3PXP
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};
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static totp_t totp_data[] = {
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TOTP_INITIALIZER('2', 'F', key_1, SHA1, 30),
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TOTP_INITIALIZER('A', 'C', key_2, SHA1, 30),
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};
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// END OF KEY DATA.
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////////////////////////////////////////////////////////////////////////////////
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static void _update_display(totp_state_t *totp_state) {
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char buf[14];
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div_t result;
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uint8_t valid_for;
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result = div(totp_state->timestamp, timesteps[totp_state->current_index]);
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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 = timesteps[totp_state->current_index] - result.rem;
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sprintf(buf, "%c%c%2d%06lu", labels[totp_state->current_index][0], labels[totp_state->current_index][1], valid_for, totp_state->current_code);
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watch_display_string(buf, 0);
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}
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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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}
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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(keys, key_sizes[0], timesteps[0], algorithms[0]);
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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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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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_update_display(totp_state);
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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_UP:
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if (totp_state->current_index + 1 < num_keys) {
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totp_state->current_key_offset += key_sizes[totp_state->current_index];
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totp_state->current_index++;
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} else {
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// wrap around to first key
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totp_state->current_key_offset = 0;
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totp_state->current_index = 0;
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}
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TOTP(keys + totp_state->current_key_offset, key_sizes[totp_state->current_index], timesteps[totp_state->current_index], algorithms[totp_state->current_index]);
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_update_display(totp_state);
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break;
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case EVENT_ALARM_BUTTON_DOWN:
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case EVENT_ALARM_LONG_PRESS:
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break;
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default:
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movement_default_loop_handler(event, settings);
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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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