void fsm_msgChangePin(ChangePin *msg)
{
bool removal = msg->has_remove && msg->remove;
bool confirmed = false;
if(removal)
{
if(storage_has_pin())
{
confirmed = confirm(ButtonRequestType_ButtonRequest_RemovePin,
"Remove PIN", "Do you want to remove PIN protection?");
}
else
{
fsm_sendSuccess("PIN removed");
return;
}
}
else
{
if(storage_has_pin())
confirmed = confirm(ButtonRequestType_ButtonRequest_ChangePin,
"Change PIN", "Do you want to change your PIN?");
else
confirmed = confirm(ButtonRequestType_ButtonRequest_CreatePin,
"Create PIN", "Do you want to add PIN protection?");
}
if(!confirmed)
{
fsm_sendFailure(FailureType_Failure_ActionCancelled,
removal ? "PIN removal cancelled" : "PIN change cancelled");
go_home();
return;
}
if(!pin_protect("Enter Current PIN"))
{
go_home();
return;
}
if(removal)
{
storage_set_pin(0);
storage_commit();
fsm_sendSuccess("PIN removed");
}
else
{
if(change_pin())
{
storage_commit();
fsm_sendSuccess("PIN changed");
}
}
go_home();
}
/*
* storage_init() - Validate storage content and copy data to shadow memory
*
* INPUT
* none
* OUTPUT
* none
*/
void storage_init(void)
{
ConfigFlash *stor_config;
/* Find storage sector with valid data and set storage_location variable */
if(find_active_storage(&storage_location))
{
stor_config = (ConfigFlash *)flash_write_helper(storage_location);
}
else
{
/* Set to storage sector1 as default if no sector has been initialized */
storage_location = STORAGE_SECT_DEFAULT;
stor_config = (ConfigFlash *)flash_write_helper(storage_location);
}
/* Reset shadow configuration in RAM */
storage_reset();
/* Verify storage partition is initialized */
if(memcmp((void *)stor_config->meta.magic , STORAGE_MAGIC_STR,
STORAGE_MAGIC_LEN) == 0)
{
/* Clear out stor_config before finding end config node */
memcpy(shadow_config.meta.uuid, (void *)&stor_config->meta.uuid,
sizeof(shadow_config.meta.uuid));
data2hex(shadow_config.meta.uuid, sizeof(shadow_config.meta.uuid),
shadow_config.meta.uuid_str);
if(stor_config->storage.version)
{
if(stor_config->storage.version <= STORAGE_VERSION)
{
storage_from_flash(stor_config);
}
}
/* New app with storage version changed! update the storage space */
if(stor_config->storage.version != STORAGE_VERSION)
{
storage_commit();
}
}
else
{
/* Keep storage area cleared */
storage_reset_uuid();
storage_commit();
}
}
void fsm_msgLoadDevice(LoadDevice *msg)
{
if(storage_is_initialized())
{
fsm_sendFailure(FailureType_Failure_UnexpectedMessage,
"Device is already initialized. Use Wipe first.");
return;
}
if(!confirm_load_device(msg->has_node))
{
fsm_sendFailure(FailureType_Failure_ActionCancelled, "Load cancelled");
go_home();
return;
}
if(msg->has_mnemonic && !(msg->has_skip_checksum && msg->skip_checksum))
{
if(!mnemonic_check(msg->mnemonic))
{
fsm_sendFailure(FailureType_Failure_ActionCancelled,
"Mnemonic with wrong checksum provided");
go_home();
return;
}
}
storage_load_device(msg);
storage_commit();
fsm_sendSuccess("Device loaded");
go_home();
}
void fsm_msgLoadDevice(LoadDevice *msg)
{
if (storage_isInitialized()) {
fsm_sendFailure(FailureType_Failure_UnexpectedMessage, "Device is already initialized. Use Wipe first.");
return;
}
layoutDialogSwipe(DIALOG_ICON_QUESTION, "Cancel", "I take the risk", NULL, "Loading private seed", "is not recommended.", "Continue only if you", "know what you are", "doing!", NULL);
if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, "Load cancelled");
layoutHome();
return;
}
if (msg->has_mnemonic && !(msg->has_skip_checksum && msg->skip_checksum) ) {
if (!mnemonic_check(msg->mnemonic)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, "Mnemonic with wrong checksum provided");
layoutHome();
return;
}
}
storage_loadDevice(msg);
storage_commit();
fsm_sendSuccess("Device loaded");
layoutHome();
}
void fsm_msgApplySettings(ApplySettings *msg)
{
if (msg->has_label && msg->has_language) {
layoutDialogSwipe(DIALOG_ICON_QUESTION, "Cancel", "Confirm", NULL, "Do you really want to", "change label to", msg->label, "and language to", msg->language, "?");
} else
if (msg->has_label) {
layoutDialogSwipe(DIALOG_ICON_QUESTION, "Cancel", "Confirm", NULL, "Do you really want to", "change label to", msg->label, "?", NULL, NULL);
} else
if (msg->has_language) {
layoutDialogSwipe(DIALOG_ICON_QUESTION, "Cancel", "Confirm", NULL, "Do you really want to", "change language to", msg->language, "?", NULL, NULL);
} else {
fsm_sendFailure(FailureType_Failure_SyntaxError, "No setting provided");
return;
}
if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, "Apply settings cancelled");
layoutHome();
return;
}
if (!protectPin(true)) {
layoutHome();
return;
}
if (msg->has_label) {
storage_setLabel(msg->label);
}
if (msg->has_language) {
storage_setLanguage(msg->language);
}
storage_commit();
fsm_sendSuccess("Settings applied");
layoutHome();
}
void recovery_word(const char *word)
{
if (!awaiting_word) {
fsm_sendFailure(FailureType_Failure_UnexpectedMessage, "Not in Recovery mode");
layoutHome();
return;
}
if (word_pos == 0) { // fake word
if (strcmp(word, fake_word) != 0) {
storage_reset();
fsm_sendFailure(FailureType_Failure_SyntaxError, "Wrong word retyped");
layoutHome();
return;
}
} else { // real word
if (enforce_wordlist) { // check if word is valid
const char * const *wl = mnemonic_wordlist();
bool found = false;
while (*wl) {
if (strcmp(word, *wl) == 0) {
found = true;
break;
}
wl++;
}
if (!found) {
storage_reset();
fsm_sendFailure(FailureType_Failure_SyntaxError, "Word not found in a wordlist");
layoutHome();
return;
}
}
strlcpy(words[word_pos - 1], word, sizeof(words[word_pos - 1]));
}
if (word_index + 1 == 24) { // last one
uint32_t i;
strlcpy(storage.mnemonic, words[0], sizeof(storage.mnemonic));
for (i = 1; i < word_count; i++) {
strlcat(storage.mnemonic, " ", sizeof(storage.mnemonic));
strlcat(storage.mnemonic, words[i], sizeof(storage.mnemonic));
}
if (!enforce_wordlist || mnemonic_check(storage.mnemonic)) {
storage.has_mnemonic = true;
storage_commit();
fsm_sendSuccess("Device recovered");
} else {
storage_reset();
fsm_sendFailure(FailureType_Failure_SyntaxError, "Invalid mnemonic, are words in correct order?");
}
awaiting_word = false;
layoutHome();
} else {
word_index++;
next_word();
}
}
void fsm_msgApplySettings(ApplySettings *msg)
{
if (msg->has_label) {
layoutDialogSwipe(DIALOG_ICON_QUESTION, "Cancel", "Confirm", NULL, "Do you really want to", "change label to", msg->label, "?", NULL, NULL);
if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, "Apply settings cancelled");
layoutHome();
return;
}
}
if (msg->has_language) {
layoutDialogSwipe(DIALOG_ICON_QUESTION, "Cancel", "Confirm", NULL, "Do you really want to", "change language to", msg->language, "?", NULL, NULL);
if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, "Apply settings cancelled");
layoutHome();
return;
}
}
if (msg->has_use_passphrase) {
layoutDialogSwipe(DIALOG_ICON_QUESTION, "Cancel", "Confirm", NULL, "Do you really want to", msg->use_passphrase ? "enable passphrase" : "disable passphrase", "encryption?", NULL, NULL, NULL);
if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, "Apply settings cancelled");
layoutHome();
return;
}
}
if (msg->has_homescreen) {
layoutDialogSwipe(DIALOG_ICON_QUESTION, "Cancel", "Confirm", NULL, "Do you really want to", "change the home", "screen ?", NULL, NULL, NULL);
if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, "Apply settings cancelled");
layoutHome();
return;
}
}
if (!msg->has_label && !msg->has_language && !msg->has_use_passphrase && !msg->has_homescreen) {
fsm_sendFailure(FailureType_Failure_SyntaxError, "No setting provided");
return;
}
if (!protectPin(true)) {
layoutHome();
return;
}
if (msg->has_label) {
storage_setLabel(msg->label);
}
if (msg->has_language) {
storage_setLanguage(msg->language);
}
if (msg->has_use_passphrase) {
storage_setPassphraseProtection(msg->use_passphrase);
}
if (msg->has_homescreen) {
storage_setHomescreen(msg->homescreen.bytes, msg->homescreen.size);
}
storage_commit();
fsm_sendSuccess("Settings applied");
layoutHome();
}
void storage_increasePinFails(void)
{
if (!storage.has_pin_failed_attempts) {
storage.has_pin_failed_attempts = true;
storage.pin_failed_attempts = 1;
} else {
storage.pin_failed_attempts++;
}
storage_commit();
}
/*
* storage_reset_pin_fails() - Reset PIN failures
*
* INPUT
* none
* OUTPUT
* none
*/
void storage_reset_pin_fails(void)
{
/* Only write to flash if there's a change in status */
if(shadow_config.storage.has_pin_failed_attempts == true)
{
shadow_config.storage.has_pin_failed_attempts = false;
shadow_config.storage.pin_failed_attempts = 0;
storage_commit();
}
}
void storage_init(void)
{
storage_reset();
// if magic is ok
if (memcmp((void *)FLASH_STORAGE_START, "stor", 4) == 0) {
// load uuid
memcpy(storage_uuid, (void *)(FLASH_STORAGE_START + 4), sizeof(storage_uuid));
data2hex(storage_uuid, sizeof(storage_uuid), storage_uuid_str);
// load storage struct
uint32_t version = ((Storage *)(FLASH_STORAGE_START + 4 + sizeof(storage_uuid)))->version;
if (version && version <= STORAGE_VERSION) {
storage_from_flash(version);
}
if (version != STORAGE_VERSION) {
storage_commit();
}
} else {
storage_reset_uuid();
storage_commit();
}
}
void storage_setPin(const char *pin)
{
if (pin && strlen(pin) > 0) {
storage.has_pin = true;
strlcpy(storage.pin, pin, sizeof(storage.pin));
} else {
storage.has_pin = false;
storage.pin[0] = 0;
}
storage_commit();
sessionPinCached = false;
}
/*
* storage_set_root_node_cache() - Set root node in storage cache
*
* INPUT
* - node: hd node to cache
* OUTPUT
* none
*
*/
static void storage_set_root_node_cache(HDNode *node)
{
if(!(shadow_config.storage.has_passphrase_protection &&
shadow_config.storage.passphrase_protection && strlen(sessionPassphrase)))
{
memset(&shadow_config.cache.root_node_cache, 0,
sizeof(((ConfigFlash *)NULL)->cache.root_node_cache));
memcpy(&shadow_config.cache.root_node_cache, node,
sizeof(((ConfigFlash *)NULL)->cache.root_node_cache));
shadow_config.cache.root_node_cache_status = CACHE_EXISTS;
storage_commit();
}
}
/*
* storage_increase_pin_fails() - Increment PIN failed attempts
*
* INPUT
* none
* OUTPUT
* none
*/
void storage_increase_pin_fails(void)
{
if(!shadow_config.storage.has_pin_failed_attempts)
{
shadow_config.storage.has_pin_failed_attempts = true;
shadow_config.storage.pin_failed_attempts = 1;
}
else
{
shadow_config.storage.pin_failed_attempts++;
}
storage_commit();
}
void fsm_msgWipeDevice(WipeDevice *msg)
{
(void)msg;
layoutDialogSwipe(DIALOG_ICON_QUESTION, "Cancel", "Confirm", NULL, "Do you really want to", "wipe the device?", NULL, "All data will be lost.", NULL, NULL);
if (!protectButton(ButtonRequestType_ButtonRequest_WipeDevice, false)) {
fsm_sendFailure(FailureType_Failure_ActionCancelled, "Wipe cancelled");
layoutHome();
return;
}
storage_reset();
storage_reset_uuid();
storage_commit();
// the following does not work on Mac anyway :-/ Linux/Windows are fine, so it is not needed
// usbReconnect(); // force re-enumeration because of the serial number change
fsm_sendSuccess("Device wiped");
layoutHome();
}
void fsm_msgWipeDevice(WipeDevice *msg)
{
(void)msg;
if(!confirm(ButtonRequestType_ButtonRequest_WipeDevice, "Wipe Device",
"Do you want to erase your private keys and settings?"))
{
fsm_sendFailure(FailureType_Failure_ActionCancelled, "Wipe cancelled");
go_home();
return;
}
/* Wipe device */
storage_reset();
storage_reset_uuid();
storage_commit();
fsm_sendSuccess("Device wiped");
go_home();
}
void reset_entropy(const uint8_t *ext_entropy, uint32_t len)
{
if(!awaiting_entropy)
{
fsm_sendFailure(FailureType_Failure_UnexpectedMessage, "Not in Reset mode");
return;
}
SHA256_CTX ctx;
sha256_Init(&ctx);
sha256_Update(&ctx, int_entropy, 32);
sha256_Update(&ctx, ext_entropy, len);
sha256_Final(int_entropy, &ctx);
const char *temp_mnemonic = mnemonic_from_data(int_entropy, strength / 8);
memset(int_entropy, 0, 32);
awaiting_entropy = false;
/*
* Format mnemonic for user review
*/
uint32_t word_count = 0, current_page = 0, page_count;
char *tok;
char tokened_mnemonic[TOKENED_MNEMONIC_BUF];
char mnemonic_by_screen[MAX_PAGES][MNEMONIC_BY_SCREEN_BUF];
char formatted_mnemonic[MAX_PAGES][FORMATTED_MNEMONIC_BUF];
char mnemonic_display[FORMATTED_MNEMONIC_BUF];
char formatted_word[MAX_WORD_LEN + ADDITIONAL_WORD_PAD];
strlcpy(tokened_mnemonic, temp_mnemonic, TOKENED_MNEMONIC_BUF);
tok = strtok(tokened_mnemonic, " ");
while(tok)
{
snprintf(formatted_word, MAX_WORD_LEN + ADDITIONAL_WORD_PAD, "%lu.%s",
(unsigned long)(word_count + 1), tok);
/* Check that we have enough room on display to show word */
snprintf(mnemonic_display, FORMATTED_MNEMONIC_BUF, "%s %s",
formatted_mnemonic[current_page], formatted_word);
if(calc_str_line(get_body_font(), mnemonic_display, BODY_WIDTH) > 3)
{
page_count++;
current_page++;
snprintf(mnemonic_display, FORMATTED_MNEMONIC_BUF, "%s %s",
formatted_mnemonic[current_page], formatted_word);
}
strlcpy(formatted_mnemonic[current_page], mnemonic_display,
FORMATTED_MNEMONIC_BUF);
/* Save mnemonic for each screen */
if(strlen(mnemonic_by_screen[current_page]) == 0)
{
strlcpy(mnemonic_by_screen[current_page], tok, MNEMONIC_BY_SCREEN_BUF);
}
else
{
strlcat(mnemonic_by_screen[current_page], " ", MNEMONIC_BY_SCREEN_BUF);
strlcat(mnemonic_by_screen[current_page], tok, MNEMONIC_BY_SCREEN_BUF);
}
tok = strtok(NULL, " ");
word_count++;
}
/* Have user confirm mnemonic is sets of 12 words */
for(page_count = current_page + 1, current_page = 0; current_page < page_count; current_page++)
{
char title[MEDIUM_STR_BUF] = "Recovery Sentence";
/* make current screen mnemonic available via debuglink */
strlcpy(current_words, mnemonic_by_screen[current_page], MNEMONIC_BY_SCREEN_BUF);
if(page_count > 1)
{
/* snprintf: 20 + 10 (%d) + 1 (NULL) = 31 */
snprintf(title, MEDIUM_STR_BUF, "Recovery Sentence %lu/%lu", current_page + 1, page_count);
}
if(!confirm(ButtonRequestType_ButtonRequest_ConfirmWord, title, "%s",
formatted_mnemonic[current_page]))
{
fsm_sendFailure(FailureType_Failure_ActionCancelled, "Reset cancelled");
storage_reset();
go_home();
return;
}
}
/* Save mnemonic */
storage_set_mnemonic(temp_mnemonic);
storage_commit();
fsm_sendSuccess("Device reset");
go_home();
}
void storage_resetPinFails(void)
{
storage.has_pin_failed_attempts = true;
storage.pin_failed_attempts = 0;
storage_commit();
}
void fsm_msgApplySettings(ApplySettings *msg)
{
if(msg->has_label)
{
if(!confirm(ButtonRequestType_ButtonRequest_ChangeLabel,
"Change Label", "Do you want to change the label to \"%s\"?", msg->label))
{
fsm_sendFailure(FailureType_Failure_ActionCancelled,
"Apply settings cancelled");
go_home();
return;
}
}
if(msg->has_language)
{
if(!confirm(ButtonRequestType_ButtonRequest_ChangeLanguage,
"Change Language", "Do you want to change the language to %s?", msg->language))
{
fsm_sendFailure(FailureType_Failure_ActionCancelled,
"Apply settings cancelled");
go_home();
return;
}
}
if(msg->has_use_passphrase)
{
if(msg->use_passphrase)
{
if(!confirm(ButtonRequestType_ButtonRequest_EnablePassphrase,
"Enable Passphrase", "Do you want to enable passphrase encryption?",
msg->language))
{
fsm_sendFailure(FailureType_Failure_ActionCancelled,
"Apply settings cancelled");
go_home();
return;
}
}
else
{
if(!confirm(ButtonRequestType_ButtonRequest_DisablePassphrase,
"Disable Passphrase", "Do you want to disable passphrase encryption?",
msg->language))
{
fsm_sendFailure(FailureType_Failure_ActionCancelled,
"Apply settings cancelled");
go_home();
return;
}
}
}
if(!msg->has_label && !msg->has_language && !msg->has_use_passphrase)
{
fsm_sendFailure(FailureType_Failure_SyntaxError, "No setting provided");
return;
}
if(!pin_protect_cached())
{
go_home();
return;
}
if(msg->has_label)
{
storage_set_label(msg->label);
}
if(msg->has_language)
{
storage_set_language(msg->language);
}
if(msg->has_use_passphrase)
{
storage_set_passphrase_protected(msg->use_passphrase);
}
storage_commit();
fsm_sendSuccess("Settings applied");
go_home();
}
void recovery_word(const char *word)
{
if (!awaiting_word)
{
fsm_sendFailure(FailureType_Failure_UnexpectedMessage, "Not in Recovery mode");
go_home();
return;
}
if (word_pos == 0)
{ // fake word
if (strcmp(word, fake_word) != 0) {
storage_reset();
fsm_sendFailure(FailureType_Failure_SyntaxError, "Wrong word retyped");
go_home();
return;
}
} else { // real word
if (enforce_wordlist)
{ // check if word is valid
const char * const *wl = mnemonic_wordlist();
bool found = false;
while (*wl)
{
if (strcmp(word, *wl) == 0)
{
found = true;
break;
}
wl++;
}
if (!found)
{
storage_reset();
fsm_sendFailure(FailureType_Failure_SyntaxError, "Word not found in a wordlist");
go_home();
return;
}
}
strlcpy(words[word_pos - 1], word, sizeof(words[word_pos - 1]));
}
if (word_index + 1 == 24)
{ // last one
storage_set_mnemonic_from_words((const char (*)[])words, word_count);
if (!enforce_wordlist || mnemonic_check(storage_get_shadow_mnemonic()))
{
storage_commit();
fsm_sendSuccess("Device recovered");
} else {
storage_reset();
fsm_sendFailure(FailureType_Failure_SyntaxError, "Invalid mnemonic, are words in correct order?");
}
awaiting_word = false;
go_home();
} else {
word_index++;
next_word();
}
}
void reset_entropy(const uint8_t *ext_entropy, uint32_t len)
{
if (!awaiting_entropy) {
fsm_sendFailure(FailureType_Failure_UnexpectedMessage, "Not in Reset mode");
return;
}
SHA256_CTX ctx;
sha256_Init(&ctx);
sha256_Update(&ctx, int_entropy, 32);
sha256_Update(&ctx, ext_entropy, len);
sha256_Final(int_entropy, &ctx);
strlcpy(storage.mnemonic, mnemonic_from_data(int_entropy, strength / 8), sizeof(storage.mnemonic));
memset(int_entropy, 0, 32);
awaiting_entropy = false;
int pass, word_pos, i = 0, j;
for (pass = 0; pass < 2; pass++) {
i = 0;
for (word_pos = 1; word_pos <= (int)strength/32*3; word_pos++) {
// copy current_word
j = 0;
while (storage.mnemonic[i] != ' ' && storage.mnemonic[i] != 0 && j + 1 < (int)sizeof(current_word)) {
current_word[j] = storage.mnemonic[i];
i++;
j++;
}
current_word[j] = 0;
if (storage.mnemonic[i] != 0) i++;
char desc[] = "##th word is:";
if (word_pos < 10) {
desc[0] = ' ';
} else {
desc[0] = '0' + word_pos / 10;
}
desc[1] = '0' + word_pos % 10;
if (word_pos == 1 || word_pos == 21) {
desc[2] = 's';
desc[3] = 't';
} else if (word_pos == 2 || word_pos == 22) {
desc[2] = 'n';
desc[3] = 'd';
} else if (word_pos == 3 || word_pos == 23) {
desc[2] = 'r';
desc[3] = 'd';
}
if (word_pos == (int)strength/32*3) { // last word
if (pass == 1) {
layoutDialogSwipe(DIALOG_ICON_INFO, NULL, "Finish", NULL, "Please check the seed", NULL, (word_pos < 10 ? desc + 1 : desc), NULL, current_word, NULL);
} else {
layoutDialogSwipe(DIALOG_ICON_INFO, NULL, "Again", NULL, "Write down the seed", NULL, (word_pos < 10 ? desc + 1 : desc), NULL, current_word, NULL);
}
} else {
if (pass == 1) {
layoutDialogSwipe(DIALOG_ICON_INFO, NULL, "Next", NULL, "Please check the seed", NULL, (word_pos < 10 ? desc + 1 : desc), NULL, current_word, NULL);
} else {
layoutDialogSwipe(DIALOG_ICON_INFO, NULL, "Next", NULL, "Write down the seed", NULL, (word_pos < 10 ? desc + 1 : desc), NULL, current_word, NULL);
}
}
if (!protectButton(ButtonRequestType_ButtonRequest_ConfirmWord, true)) {
storage_reset();
layoutHome();
return;
}
}
}
storage.has_mnemonic = true;
storage_commit();
fsm_sendSuccess("Device reset");
layoutHome();
}