mirror of
https://github.com/trezor/trezor-firmware.git
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80 lines
2.0 KiB
C
80 lines
2.0 KiB
C
/*
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* This file is part of the TREZOR project.
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*
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* Copyright (C) 2014 Pavol Rusnak <stick@satoshilabs.com>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <string.h>
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#include "pinmatrix.h"
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#include "oled.h"
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#include "rng.h"
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static char pinmatrix_perm[10] = "XXXXXXXXX";
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void pinmatrix_draw(const char *text)
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{
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const BITMAP *bmp_digits[10] = {
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&bmp_digit0, &bmp_digit1, &bmp_digit2, &bmp_digit3, &bmp_digit4,
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&bmp_digit5, &bmp_digit6, &bmp_digit7, &bmp_digit8, &bmp_digit9,
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};
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oledSwipeLeft();
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const int w = bmp_digit0.width, h = bmp_digit0.height, pad = 2;
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int i, j, k;
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for (i = 0; i < 3; i++) {
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for (j = 0; j < 3; j++) {
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// use (2 - j) instead of j to achieve 789456123 layout
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k = pinmatrix_perm[i + (2 - j) * 3] - '0';
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if (text) {
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oledDrawStringCenter(0, text);
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}
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oledDrawBitmap((OLED_WIDTH - 3 * w - 2 * pad) / 2 + i * (w + pad), OLED_HEIGHT - 3 * h - 2 * pad + j * (h + pad), bmp_digits[k]);
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}
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}
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oledRefresh();
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}
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void pinmatrix_start(const char *text)
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{
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int i;
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for (i = 0; i < 9; i++) {
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pinmatrix_perm[i] = '1' + i;
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}
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pinmatrix_perm[9] = 0;
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random_permute(pinmatrix_perm, 9);
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pinmatrix_draw(text);
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}
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void pinmatrix_done(char *pin)
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{
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int k, i = 0;
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while (pin && pin[i]) {
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k = pin[i] - '1';
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if (k >= 0 && k <= 8) {
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pin[i] = pinmatrix_perm[k];
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} else {
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pin[i] = 'X';
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}
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i++;
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}
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memset(pinmatrix_perm, 'X', sizeof(pinmatrix_perm));
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}
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const char *pinmatrix_get(void)
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{
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return pinmatrix_perm;
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}
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