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Merge PR #37: lock screen PIN (3urobeat), adapted

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The contributor's feature -- a PIN asked before the screen unlocks, on
boot, and when the magnet cover opens, stored as a salted SHA-256 -- on
top of this branch, with:

- ui-core/ScreenLock.h: set / check / isSet and the tries limit, shared by
  L1 and L2. isSet looks at every byte (the PR tested only the first, so one
  PIN in 256 silently disabled the lock). 5 misses pause entry for 30 s.
- NodePrefs: the fields at the tail after quiet hours, sentinel 0xC0DE0031,
  sizeof 2880; an older file's bytes there are cleared. A sentinel bump no
  longer resets display_brightness_pct from a file that already has it.
- DataStore: no AGPL header (the project is MIT), no whitespace churn.
- Keyboard: the number pad is a widget flag (pin_mode) with a prompt in the
  preview ("New PIN", "Again", "PIN"), not keyboard_type = 2 written into the
  prefs and restored after.
- L1 Settings: "Lock PIN" right after the schema's "Lock screen" row, typed
  twice, at least 4 characters, saved at once (a power-off right after
  setting it kept no PIN). Home is told about a boot-time lock once it
  exists (also fixes booting with the cover closed).
- L2: the screen PIN moves from plain text in NVS to the same hash in
  NodePrefs; the old one is migrated on first boot and removed. The pad
  unlocks as soon as the hash matches from 4 digits on.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Jakub
2026-09-29 00:06:01 +02:00
co-authored by Claude Opus 5.5
parent 0e1b3c9cfd 02726edcdc
commit 358f92222a
13 changed files with 540 additions and 71 deletions
Download Patch File Download Diff File Expand all files Collapse all files
examples/companion_radio/ui-lvgl/DeviceScreen.h
+25 -23
View File
@@ -4,7 +4,7 @@
// - lock screen (Settings > Display & power > Lock screen, NodePrefs::auto_lock):
// once the screen turns off, waking shows a clock card and nothing reacts
// until "slide to unlock" -- against touches in a pocket; with a screen PIN
// (NVS, lvport::loadPin) the card always comes up, also after a reboot, and
// (NodePrefs, ui-core/ScreenLock.h) the card always comes up, also after a reboot, and
// asks for the PIN on a keypad instead of the slider;
// - favourites dial (Home > Favourites, NodePrefs::favourite_contacts): six
// slots holding a contact, room or channel; tap opens it, hold changes /
@@ -24,8 +24,6 @@ static lv_obj_t* s_lock_slider = nullptr;
static lv_obj_t* s_pin_dots = nullptr; // lock card / setup popup: one dot per digit typed
static lv_obj_t* s_pin_msg = nullptr; // "Wrong PIN" / "Try again in 30 s" / setup step
static const uint8_t PIN_MIN = 4, PIN_MAX = 8;
static const uint8_t PIN_TRIES = 5; // misses before a pause
static const uint32_t PIN_PAUSE_MS = 30000;
static const char* const PIN_MAP[] = { "1", "2", "3", "\n", "4", "5", "6", "\n", "7", "8", "9", "\n",
LV_SYMBOL_BACKSPACE, "0", LV_SYMBOL_OK, "" };
@@ -174,7 +172,7 @@ void UITask::lockScreen() {
lv_obj_set_flex_align(s_lock, LV_FLEX_ALIGN_START, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER);
lv_obj_set_style_pad_top(s_lock, 18, 0);
lv_obj_set_style_pad_row(s_lock, 4, 0);
if (_pin[0]) { // compact card: the time and unread on one line, the keypad below
if (pinSet()) { // compact card: the time and unread on one line, the keypad below
lv_obj_set_style_pad_top(s_lock, 4, 0);
lv_obj_set_style_pad_row(s_lock, 2, 0);
lv_obj_t* top = lv_obj_create(s_lock);
@@ -297,9 +295,9 @@ void UITask::refreshLock() {
if (unread > 0) lv_label_set_text_fmt(s_lock_unread, LV_SYMBOL_ENVELOPE " %d", unread);
else lv_label_set_text(s_lock_unread, "");
if (!s_pin_msg) return;
int32_t left = (int32_t)(_pin_block_until - millis());
if (_pin_block_until && left > 0) lv_label_set_text_fmt(s_pin_msg, "Too many tries - wait %ld s", (long)((left + 999) / 1000));
else if (_pin_block_until) { _pin_block_until = 0; lv_label_set_text(s_pin_msg, "Enter PIN"); }
bool was = _pin_tries.block_until != 0;
if (_pin_tries.blocked()) lv_label_set_text_fmt(s_pin_msg, "Too many tries - wait %lu s", (unsigned long)_pin_tries.secondsLeft());
else if (was) lv_label_set_text(s_pin_msg, "Enter PIN");
else if (!lv_label_get_text(s_pin_msg)[0]) lv_label_set_text(s_pin_msg, "Enter PIN");
return;
}
@@ -309,28 +307,28 @@ void UITask::refreshLock() {
// ── Screen PIN ────────────────────────────────────────────────────────────────
// Lock card keypad: the PIN unlocks as soon as it's complete (OK checks a
// shorter entry); five misses pause entry for 30 s.
// Lock card keypad: the PIN unlocks as soon as it matches (from 4 digits on;
// only its hash is kept, so not its length); OK or a full 8 digits that
// don't match count a miss, and five misses pause entry for 30 s.
void UITask::pinKey(const char* key) {
using namespace devview;
if (!s_lock || !_pin[0]) return;
if (_pin_block_until && (int32_t)(_pin_block_until - millis()) > 0) return;
if (!s_lock || !pinSet()) return;
if (_pin_tries.blocked()) return;
bool ok = pinEdit(_pin_entry, key);
size_t n = strlen(_pin_entry);
if (!ok && n < strlen(_pin)) {
if (n >= PIN_MIN && screenlock::check(*_prefs, _pin_entry)) { _pin_tries.ok(); unlockScreen(); return; }
if (!ok && n < PIN_MAX) {
if (n && s_pin_msg) lv_label_set_text(s_pin_msg, "Enter PIN");
return;
}
if (!n) return;
if (!strcmp(_pin_entry, _pin)) { _pin_fails = 0; unlockScreen(); return; }
_pin_entry[0] = '\0';
showDots(_pin_entry);
if (++_pin_fails >= PIN_TRIES) {
_pin_fails = 0;
_pin_block_until = (millis() + PIN_PAUSE_MS) | 1;
if (_pin_tries.miss()) {
refreshLock();
} else if (s_pin_msg) {
lv_label_set_text_fmt(s_pin_msg, "Wrong PIN - %d tr%s left", PIN_TRIES - _pin_fails, PIN_TRIES - _pin_fails == 1 ? "y" : "ies");
int left = _pin_tries.left();
lv_label_set_text_fmt(s_pin_msg, "Wrong PIN - %d tr%s left", left, left == 1 ? "y" : "ies");
}
}
@@ -339,10 +337,10 @@ void UITask::pinKey(const char* key) {
void UITask::pinSetupPopup() {
using namespace devview;
_pin_entry[0] = _pin_new[0] = '\0';
lv_obj_t* panel = navPopupPanel(_pin[0] ? "Change PIN" : "Set screen PIN", true);
lv_obj_t* panel = navPopupPanel(pinSet() ? "Change PIN" : "Set screen PIN", true);
lv_obj_set_flex_align(panel, LV_FLEX_ALIGN_START, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER);
lv_obj_set_style_pad_row(panel, 2, 0);
if (_pin[0]) { // next to the close button
if (pinSet()) { // next to the close button
lv_obj_t* l;
headerButton(lv_obj_get_child(panel, 0), LV_SYMBOL_TRASH " Remove", onPinRemove, 44, &l);
lv_obj_set_style_text_color(l, lv_color_hex(theme::FAIL), 0);
@@ -369,8 +367,10 @@ void UITask::pinSetupKey(const char* key) {
lv_label_set_text(s_pin_msg, "Didn't match - new PIN again");
return;
}
strcpy(_pin, _pin_new);
lvport::savePin(_pin);
if (_prefs) {
screenlock::set(*_prefs, _pin_new, the_mesh.getRNG());
the_mesh.savePrefs();
}
_pin_new[0] = _pin_entry[0] = '\0';
navClosePopup();
showToast("PIN set - asked each time the screen wakes", 3000);
@@ -378,8 +378,10 @@ void UITask::pinSetupKey(const char* key) {
}
void UITask::pinRemove() {
_pin[0] = '\0';
lvport::savePin("");
if (_prefs) {
screenlock::clear(*_prefs);
the_mesh.savePrefs();
}
navClosePopup();
showToast("PIN removed");
pinRowRefresh();