const char *words_from_data(const uint8_t *data, int len)
{
if (len > 32)
return NULL;
int mlen = len * 3 / 4;
static char mnemo[24 * 10];
const char *const *wordlist = mnemonic_wordlist();
int i, j, idx;
char *p = mnemo;
for (i = 0; i < mlen; i++) {
idx = 0;
for (j = 0; j < 11; j++) {
idx <<= 1;
idx += (data[(i * 11 + j) / 8] & (1 << (7 - ((i * 11 + j) % 8)))) > 0;
}
strcpy(p, wordlist[idx]);
p += strlen(wordlist[idx]);
*p = (i < mlen - 1) ? ' ' : 0;
p++;
}
return mnemo;
}
void next_word(void) {
word_pos = word_order[word_index];
if (word_pos == 0) {
const char * const *wl = mnemonic_wordlist();
strlcpy(fake_word, wl[random_uniform(2048)], sizeof(fake_word));
layoutDialogSwipe(DIALOG_ICON_INFO, NULL, NULL, NULL, "Please enter the word", NULL, fake_word, NULL, "on your computer", NULL);
} else {
fake_word[0] = 0;
char desc[] = "##th word";
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';
}
layoutDialogSwipe(DIALOG_ICON_INFO, NULL, NULL, NULL, "Please enter the", NULL, (word_pos < 10 ? desc + 1 : desc), NULL, "of your mnemonic", NULL);
}
WordRequest resp;
memset(&resp, 0, sizeof(WordRequest));
msg_write(MessageType_MessageType_WordRequest, &resp);
}
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 next_word(void) {
word_pos = word_order[word_index];
char title_formatted[SMALL_STR_BUF];
char body_formatted[MEDIUM_STR_BUF];
/* Form title */
/* snprintf: 24 + 10 (%u) + 1 (NULL) = 35 */
snprintf(title_formatted, SMALL_STR_BUF, "Device Recovery Step %lu/24", (unsigned long)(word_index + 1));
if (word_pos == 0) {
const char * const *wl = mnemonic_wordlist();
strlcpy(fake_word, wl[random_uniform(2048)], sizeof(fake_word));
/* Format body for fake word */
/* snprintf: 18 + 12 (fake_word) + 1 (NULL) = 31 */
snprintf(body_formatted, MEDIUM_STR_BUF, "Enter the word \"%s\".", fake_word);
layout_standard_notification(title_formatted, body_formatted, NOTIFICATION_RECOVERY);
} else {
fake_word[0] = 0;
char desc[] = "th word";
if (word_pos == 1 || word_pos == 21) {
desc[0] = 's'; desc[1] = 't';
} else
if (word_pos == 2 || word_pos == 22) {
desc[0] = 'n'; desc[1] = 'd';
} else
if (word_pos == 3 || word_pos == 23) {
desc[0] = 'r'; desc[1] = 'd';
}
/* Format body for real word */
/* snprintf: 37 + 10 (%u) + 8 (desc) + 1 (NULL) = 56 */
snprintf(body_formatted, MEDIUM_STR_BUF, "Enter the %lu%s of your recovery sentence.", (unsigned long)word_pos, desc);
layout_standard_notification(title_formatted, body_formatted, NOTIFICATION_RECOVERY);
}
WordRequest resp;
memset(&resp, 0, sizeof(WordRequest));
msg_write(MessageType_MessageType_WordRequest, &resp);
}
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();
}
}