68 lines
2.0 KiB
C
68 lines
2.0 KiB
C
/*
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* This file is part of the Pico OpenPGP distribution (https://github.com/polhenarejos/pico-openpgp).
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* Copyright (c) 2022 Pol Henarejos.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 3.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "openpgp.h"
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int cmd_verify() {
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uint8_t p1 = P1(apdu);
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uint8_t p2 = P2(apdu);
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if (p1 == 0xFF) {
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if (apdu.nc != 0) {
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return SW_WRONG_DATA();
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}
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if (p2 == 0x81) {
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has_pw1 = false;
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}
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else if (p2 == 0x82) {
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has_pw2 = false;
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}
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else if (p2 == 0x83) {
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has_pw3 = false;
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}
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return SW_OK();
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}
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else if (p1 != 0x0 || (p2 & 0x60) != 0x0) {
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return SW_WRONG_P1P2();
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}
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uint16_t fid = 0x1000 | p2;
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if (fid == EF_RC && apdu.nc > 0) {
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fid = EF_PW1;
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}
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file_t *pw, *pw_status;
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if (!(pw = search_by_fid(fid, NULL, SPECIFY_EF))) {
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return SW_REFERENCE_NOT_FOUND();
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}
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if (!(pw_status = search_by_fid(EF_PW_PRIV, NULL, SPECIFY_EF))) {
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return SW_REFERENCE_NOT_FOUND();
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}
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if (file_get_data(pw)[0] == 0) { //not initialized
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return SW_REFERENCE_NOT_FOUND();
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}
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if (apdu.nc > 0) {
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return check_pin(pw, apdu.data, apdu.nc);
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}
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uint8_t retries = *(file_get_data(pw_status) + 3 + (fid & 0xf));
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if (retries == 0) {
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return SW_PIN_BLOCKED();
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}
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if ((p2 == 0x81 && has_pw1) || (p2 == 0x82 && has_pw2) || (p2 == 0x83 && has_pw3)) {
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return SW_OK();
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}
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return set_res_sw(0x63, 0xc0 | retries);
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}
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