1394 lines
47 KiB
C
1394 lines
47 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 "common.h"
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#include "openpgp.h"
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#include "version.h"
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#include "files.h"
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#include "random.h"
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#include "eac.h"
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#include "crypto_utils.h"
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#include "mbedtls/rsa.h"
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#include "mbedtls/ecdsa.h"
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#include "mbedtls/ecdh.h"
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#include "mbedtls/asn1.h"
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bool has_pw1 = false;
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bool has_pw2 = false;
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bool has_pw3 = false;
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uint8_t session_pw3[32];
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uint8_t openpgp_aid[] = {
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6,
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0xD2,0x76,0x00,0x01,0x24,0x01,
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};
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uint8_t openpgp_aid_full[] = {
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16,00,
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0xD2,0x76,0x00,0x01,0x24,0x01,
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OPGP_VERSION_MAJOR,OPGP_VERSION_MINOR,0xff,0xfe,0xff,0xff,0xff,0xff,0x00,0x00
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};
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char atr_openpgp[] = {
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21,
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0x3b,0xda,0x18,0xff,0x81,0xb1,0xfe,0x75,0x1f,0x03,0x00,0x31,0xf5,0x73,0xc0,0x01,0x60,0x00,0x90,0x00,0x1c
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};
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int openpgp_process_apdu();
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void select_file(file_t *pe) {
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if (!pe)
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{
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currentDF = (file_t *)MF;
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currentEF = NULL;
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}
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else if (pe->type & FILE_TYPE_INTERNAL_EF) {
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currentEF = pe;
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currentDF = &file_entries[pe->parent];
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}
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else {
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currentDF = pe;
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}
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if (currentEF == file_openpgp) {
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selected_applet = currentEF;
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//sc_hsm_unload(); //reset auth status
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}
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}
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static int cmd_select() {
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uint8_t p1 = P1(apdu);
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uint8_t p2 = P2(apdu);
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file_t *pe = NULL;
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uint16_t fid = 0x0;
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if (apdu.cmd_apdu_data_len >= 2)
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fid = get_uint16_t(apdu.cmd_apdu_data, 0);
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if (!pe) {
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if (p1 == 0x0) { //Select MF, DF or EF - File identifier or absent
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if (apdu.cmd_apdu_data_len == 0) {
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pe = (file_t *)MF;
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//ac_fini();
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}
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else if (apdu.cmd_apdu_data_len == 2) {
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if (!(pe = search_by_fid(fid, NULL, SPECIFY_ANY))) {
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return SW_FILE_NOT_FOUND();
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}
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}
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}
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else if (p1 == 0x01) { //Select child DF - DF identifier
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if (!(pe = search_by_fid(fid, currentDF, SPECIFY_DF))) {
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return SW_FILE_NOT_FOUND();
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}
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}
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else if (p1 == 0x02) { //Select EF under the current DF - EF identifier
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if (!(pe = search_by_fid(fid, currentDF, SPECIFY_EF))) {
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return SW_FILE_NOT_FOUND();
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}
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}
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else if (p1 == 0x03) { //Select parent DF of the current DF - Absent
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if (apdu.cmd_apdu_data_len != 0)
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return SW_FILE_NOT_FOUND();
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}
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else if (p1 == 0x04) { //Select by DF name - e.g., [truncated] application identifier
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if (!(pe = search_by_name(apdu.cmd_apdu_data, apdu.cmd_apdu_data_len))) {
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return SW_FILE_NOT_FOUND();
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}
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if (card_terminated) {
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return set_res_sw (0x62, 0x85);
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}
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}
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else if (p1 == 0x08) { //Select from the MF - Path without the MF identifier
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if (!(pe = search_by_path(apdu.cmd_apdu_data, apdu.cmd_apdu_data_len, MF))) {
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return SW_FILE_NOT_FOUND();
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}
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}
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else if (p1 == 0x09) { //Select from the current DF - Path without the current DF identifier
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if (!(pe = search_by_path(apdu.cmd_apdu_data, apdu.cmd_apdu_data_len, currentDF))) {
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return SW_FILE_NOT_FOUND();
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}
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}
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}
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if ((p2 & 0xfc) == 0x00 || (p2 & 0xfc) == 0x04) {
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if ((p2 & 0xfc) == 0x04)
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process_fci(pe);
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}
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else
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return SW_INCORRECT_P1P2();
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select_file(pe);
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return SW_OK ();
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}
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void scan_files() {
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scan_flash();
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file_t *ef;
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if ((ef = search_by_fid(EF_FULL_AID, NULL, SPECIFY_ANY))) {
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ef->data = openpgp_aid_full;
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pico_get_unique_board_id_string(ef->data+12, 4);
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}
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if ((ef = search_by_fid(EF_PW1, NULL, SPECIFY_ANY))) {
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if (!ef->data) {
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TU_LOG1("PW1 is empty. Initializing with default password\r\n");
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const uint8_t def[6] = { 0x31,0x32,0x33,0x34,0x35,0x36 };
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uint8_t dhash[33];
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dhash[0] = sizeof(def);
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double_hash_pin(def, sizeof(def), dhash+1);
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flash_write_data_to_file(ef, dhash, sizeof(dhash));
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}
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}
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if ((ef = search_by_fid(EF_RC, NULL, SPECIFY_ANY))) {
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if (!ef->data) {
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TU_LOG1("RC is empty. Initializing with default password\r\n");
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const uint8_t def[8] = { 0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38 };
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uint8_t dhash[33];
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dhash[0] = sizeof(def);
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double_hash_pin(def, sizeof(def), dhash+1);
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flash_write_data_to_file(ef, dhash, sizeof(dhash));
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}
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}
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if ((ef = search_by_fid(EF_PW3, NULL, SPECIFY_ANY))) {
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if (!ef->data) {
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TU_LOG1("PW3 is empty. Initializing with default password\r\n");
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const uint8_t def[8] = { 0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38 };
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uint8_t dhash[33];
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dhash[0] = sizeof(def);
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double_hash_pin(def, sizeof(def), dhash+1);
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flash_write_data_to_file(ef, dhash, sizeof(dhash));
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}
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}
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if ((ef = search_by_fid(EF_SIG_COUNT, NULL, SPECIFY_ANY))) {
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if (!ef->data) {
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TU_LOG1("SigCount is empty. Initializing to zero\r\n");
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const uint8_t def[3] = { 0 };
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flash_write_data_to_file(ef, def, sizeof(def));
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}
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}
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if ((ef = search_by_fid(EF_PW_PRIV, NULL, SPECIFY_ANY))) {
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if (!ef->data) {
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TU_LOG1("PW status is empty. Initializing to default\r\n");
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const uint8_t def[] = { 0x1, 127, 127, 127, 3, 3, 3 };
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flash_write_data_to_file(ef, def, sizeof(def));
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}
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}
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low_flash_available();
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}
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void init_openpgp() {
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isUserAuthenticated = false;
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has_pw1 = has_pw3 = false;
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scan_files();
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//cmd_select();
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}
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int openpgp_unload() {
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isUserAuthenticated = false;
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has_pw1 = has_pw3 = false;
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return CCID_OK;
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}
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app_t *openpgp_select_aid(app_t *a) {
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if (!memcmp(apdu.cmd_apdu_data, openpgp_aid+1, openpgp_aid[0])) {
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a->aid = openpgp_aid;
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a->process_apdu = openpgp_process_apdu;
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a->unload = openpgp_unload;
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init_openpgp();
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return a;
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}
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return NULL;
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}
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void __attribute__ ((constructor)) openpgp_ctor() {
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ccid_atr = atr_openpgp;
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register_app(openpgp_select_aid);
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}
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int parse_do(uint16_t *fids, int mode) {
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int len = 0;
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file_t *ef;
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for (int i = 0; i < fids[0]; i++) {
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if ((ef = search_by_fid(fids[i+1], NULL, SPECIFY_EF))) {
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uint16_t data_len;
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if ((ef->type & FILE_DATA_FUNC) == FILE_DATA_FUNC) {
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data_len = ((int (*)(const file_t *, int))(ef->data))((const file_t *)ef, mode);
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}
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else {
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if (ef->data)
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data_len = file_read_uint16(ef->data);
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else
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data_len = 0;
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if (mode == 1) {
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if (fids[0] > 1) {
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if (fids[i+1] < 0x0100) {
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res_APDU[res_APDU_size++] = fids[i+1] & 0xff;
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}
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else {
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res_APDU[res_APDU_size++] = fids[i+1] >> 8;
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res_APDU[res_APDU_size++] = fids[i+1] & 0xff;
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}
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res_APDU_size += format_tlv_len(data_len, res_APDU+res_APDU_size);
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}
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if (ef->data)
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memcpy(res_APDU+res_APDU_size, file_read(ef->data+2), data_len);
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res_APDU_size += data_len;
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}
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}
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len += data_len;
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}
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}
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return len;
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}
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int parse_trium(uint16_t fid, uint8_t num, size_t size) {
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for (uint8_t i = 0; i < num; i++) {
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file_t *ef;
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if ((ef = search_by_fid(fid+i, NULL, SPECIFY_EF)) && ef->data) {
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uint16_t data_len = file_read_uint16(ef->data);
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memcpy(res_APDU+res_APDU_size, file_read(ef->data+2), data_len);
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res_APDU_size += data_len;
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}
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else {
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memset(res_APDU+res_APDU_size, 0, size);
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res_APDU_size += size;
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}
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}
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return num*size;
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}
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int parse_ch_data(const file_t *f, int mode) {
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uint16_t fids[] = {
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3,
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EF_CH_NAME, EF_LANG_PREF, EF_SEX,
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};
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res_APDU[res_APDU_size++] = EF_CH_DATA & 0xff;
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res_APDU[res_APDU_size++] = 0x82;
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uint8_t *lp = res_APDU+res_APDU_size;
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res_APDU_size += 2;
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uint16_t data_len = parse_do(fids, mode);
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uint16_t lpdif = res_APDU+res_APDU_size-lp-2;
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*lp++ = lpdif >> 8;
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*lp++ = lpdif & 0xff;
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return lpdif+4;
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}
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int inc_sig_count() {
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file_t *pw_status;
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if (!(pw_status = search_by_fid(EF_PW_PRIV, NULL, SPECIFY_EF)) || !pw_status->data)
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return SW_REFERENCE_NOT_FOUND();
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if (file_read_uint8(pw_status->data+2) == 1)
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has_pw1 = false;
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file_t *ef = search_by_fid(EF_SIG_COUNT, NULL, SPECIFY_ANY);
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if (!ef || !ef->data)
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return CCID_ERR_FILE_NOT_FOUND;
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uint8_t *p = file_read(ef->data+2);
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uint32_t counter = (p[0] << 16) | (p[1] << 8) | p[2];
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counter++;
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uint8_t q[3] = { (counter>>16) & 0xff, (counter>>8) & 0xff, counter&0xff };
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int r = flash_write_data_to_file(ef, q, sizeof(q));
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if (r != CCID_OK)
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return CCID_EXEC_ERROR;
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low_flash_available();
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return CCID_OK;
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}
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int reset_sig_count() {
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file_t *ef = search_by_fid(EF_SIG_COUNT, NULL, SPECIFY_ANY);
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if (!ef || !ef->data)
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return CCID_ERR_FILE_NOT_FOUND;
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uint8_t q[3] = { 0 };
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int r = flash_write_data_to_file(ef, q, sizeof(q));
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if (r != CCID_OK)
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return CCID_EXEC_ERROR;
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low_flash_available();
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return CCID_OK;
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}
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int parse_sec_tpl(const file_t *f, int mode) {
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res_APDU[res_APDU_size++] = EF_SEC_TPL & 0xff;
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res_APDU[res_APDU_size++] = 5;
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file_t *ef = search_by_fid(EF_SIG_COUNT, NULL, SPECIFY_ANY);
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if (ef && ef->data) {
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res_APDU[res_APDU_size++] = EF_SIG_COUNT & 0xff;
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res_APDU[res_APDU_size++] = 3;
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memcpy(res_APDU+res_APDU_size, file_read(ef->data+2), 3);
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res_APDU_size += 3;
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}
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return 5+2;
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}
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int parse_ch_cert(const file_t *f, int mode) {
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return 0;
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}
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int parse_fp(const file_t *f, int mode) {
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res_APDU[res_APDU_size++] = EF_FP & 0xff;
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res_APDU[res_APDU_size++] = 60;
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return parse_trium(EF_FP_SIG, 3, 20);
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}
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int parse_cafp(const file_t *f, int mode) {
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res_APDU[res_APDU_size++] = EF_CA_FP & 0xff;
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res_APDU[res_APDU_size++] = 60;
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return parse_trium(EF_FP_CA1, 3, 20);
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}
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int parse_ts(const file_t *f, int mode) {
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res_APDU[res_APDU_size++] = EF_TS_ALL & 0xff;
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res_APDU[res_APDU_size++] = 12;
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return parse_trium(EF_TS_SIG, 3, 4);
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}
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int parse_keyinfo(const file_t *f, int mode) {
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int init_len = res_APDU_size;
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if (res_APDU_size > 0) {
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res_APDU[res_APDU_size++] = EF_KEY_INFO & 0xff;
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res_APDU[res_APDU_size++] = 6;
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}
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file_t *ef = search_by_fid(EF_PK_SIG, NULL, SPECIFY_ANY);
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res_APDU[res_APDU_size++] = 0x00;
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if (ef && ef->data)
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res_APDU[res_APDU_size++] = 0x01;
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else
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res_APDU[res_APDU_size++] = 0x00;
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ef = search_by_fid(EF_PK_DEC, NULL, SPECIFY_ANY);
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res_APDU[res_APDU_size++] = 0x01;
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if (ef && ef->data)
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res_APDU[res_APDU_size++] = 0x01;
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else
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res_APDU[res_APDU_size++] = 0x00;
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ef = search_by_fid(EF_PK_AUT, NULL, SPECIFY_ANY);
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res_APDU[res_APDU_size++] = 0x02;
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if (ef && ef->data)
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res_APDU[res_APDU_size++] = 0x01;
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else
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res_APDU[res_APDU_size++] = 0x00;
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return res_APDU_size-init_len;
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}
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int parse_pw_status(const file_t *f, int mode) {
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file_t *ef;
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int init_len = res_APDU_size;
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if (res_APDU_size > 0) {
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res_APDU[res_APDU_size++] = EF_PW_STATUS & 0xff;
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res_APDU[res_APDU_size++] = 7;
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}
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ef = search_by_fid(EF_PW_PRIV, NULL, SPECIFY_ANY);
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if (ef && ef->data) {
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memcpy(res_APDU+res_APDU_size, file_read(ef->data+2), 7);
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res_APDU_size += 7;
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}
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return res_APDU_size-init_len;
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}
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#define ALGO_RSA 0x01
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#define ALGO_ECDH 0x12
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#define ALGO_ECDSA 0x13
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#define ALGO_AES 0x70
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#define ALGO_AES_128 0x71
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#define ALGO_AES_192 0x72
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#define ALGO_AES_256 0x74
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#define ALGO_RSA_1K 0
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#define ALGO_RSA_2k 1
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#define ALGO_RSA_3K 2
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#define ALGO_RSA_4K 3
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#define ALGO_X448 4
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#define ALGO_P256K1 5
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#define ALGO_P256R1 6
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#define ALGO_P384R1 7
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#define ALGO_P521R1 8
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#define ALGO_BP256R1 9
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#define ALGO_BP384R1 10
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#define ALGO_BP512R1 11
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#define ALGO_CV22519 12
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static const uint8_t algorithm_attr_x448[] = {
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4,
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ALGO_ECDH,
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/* OID of X448 */
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0x2b, 0x65, 0x6f
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};
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static const uint8_t algorithm_attr_rsa1k[] = {
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6,
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ALGO_RSA,
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0x04, 0x00, /* Length modulus (in bit): 2048 */
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0x00, 0x20, /* Length exponent (in bit): 32 */
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0x00 /* 0: Acceptable format is: P and Q */
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};
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static const uint8_t algorithm_attr_rsa2k[] = {
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6,
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ALGO_RSA,
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0x08, 0x00, /* Length modulus (in bit): 2048 */
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0x00, 0x20, /* Length exponent (in bit): 32 */
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0x00 /* 0: Acceptable format is: P and Q */
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};
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|
|
static const uint8_t algorithm_attr_rsa3k[] = {
|
|
6,
|
|
ALGO_RSA,
|
|
0x0C, 0x00, /* Length modulus (in bit): 2048 */
|
|
0x00, 0x20, /* Length exponent (in bit): 32 */
|
|
0x00 /* 0: Acceptable format is: P and Q */
|
|
};
|
|
|
|
static const uint8_t algorithm_attr_rsa4k[] = {
|
|
6,
|
|
ALGO_RSA,
|
|
0x10, 0x00, /* Length modulus (in bit): 4096 */
|
|
0x00, 0x20, /* Length exponent (in bit): 32 */
|
|
0x00 /* 0: Acceptable format is: P and Q */
|
|
};
|
|
|
|
static const uint8_t algorithm_attr_p256k1[] = {
|
|
6,
|
|
ALGO_ECDSA,
|
|
0x2b, 0x81, 0x04, 0x00, 0x0a
|
|
};
|
|
|
|
static const uint8_t algorithm_attr_p256r1[] = {
|
|
9,
|
|
ALGO_ECDSA,
|
|
0x2A,0x86,0x48,0xCE,0x3D,0x03,0x01,0x07
|
|
};
|
|
|
|
static const uint8_t algorithm_attr_p384r1[] = {
|
|
6,
|
|
ALGO_ECDSA,
|
|
0x2B,0x81,0x04,0x00,0x22
|
|
};
|
|
|
|
static const uint8_t algorithm_attr_p521r1[] = {
|
|
6,
|
|
ALGO_ECDSA,
|
|
0x2B,0x81,0x04,0x00,0x23
|
|
};
|
|
|
|
static const uint8_t algorithm_attr_bp256r1[] = {
|
|
10,
|
|
ALGO_ECDSA,
|
|
0x2B,0x24,0x03,0x03,0x02,0x08,0x01,0x01,0x07
|
|
};
|
|
|
|
static const uint8_t algorithm_attr_bp384r1[] = {
|
|
10,
|
|
ALGO_ECDSA,
|
|
0x2B,0x24,0x03,0x03,0x02,0x08,0x01,0x01,0x0B
|
|
};
|
|
|
|
static const uint8_t algorithm_attr_bp512r1[] = {
|
|
10,
|
|
ALGO_ECDSA,
|
|
0x2B,0x24,0x03,0x03,0x02,0x08,0x01,0x01,0x0D
|
|
};
|
|
|
|
static const uint8_t algorithm_attr_cv25519[] = {
|
|
11,
|
|
ALGO_ECDH,
|
|
0x2b, 0x06, 0x01, 0x04, 0x01, 0x97, 0x55, 0x01, 0x05, 0x01
|
|
};
|
|
|
|
static const uint8_t *algorithm_attr[] = {
|
|
algorithm_attr_rsa1k, algorithm_attr_rsa2k, algorithm_attr_rsa3k, algorithm_attr_rsa4k,
|
|
algorithm_attr_x448, algorithm_attr_p256k1,
|
|
algorithm_attr_p256r1, algorithm_attr_p384r1, algorithm_attr_p521r1,
|
|
algorithm_attr_bp256r1, algorithm_attr_bp384r1, algorithm_attr_bp512r1,
|
|
algorithm_attr_cv25519
|
|
};
|
|
|
|
int parse_algo(const uint8_t *algo, uint16_t tag) {
|
|
res_APDU[res_APDU_size++] = tag & 0xff;
|
|
memcpy(res_APDU+res_APDU_size, algo, algo[0]+1);
|
|
res_APDU_size += algo[0]+1;
|
|
return algo[0]+2;
|
|
}
|
|
|
|
int parse_algoinfo(const file_t *f, int mode) {
|
|
uint8_t datalen = 0;
|
|
if (f->fid == EF_ALGO_INFO) {
|
|
res_APDU[res_APDU_size++] = EF_ALGO_INFO & 0xff;
|
|
uint8_t *lp = res_APDU+res_APDU_size;
|
|
res_APDU_size++;
|
|
datalen += parse_algo(algorithm_attr_rsa1k, EF_ALGO_SIG);
|
|
datalen += parse_algo(algorithm_attr_rsa2k, EF_ALGO_SIG);
|
|
datalen += parse_algo(algorithm_attr_rsa3k, EF_ALGO_SIG);
|
|
datalen += parse_algo(algorithm_attr_rsa4k, EF_ALGO_SIG);
|
|
datalen += parse_algo(algorithm_attr_p256k1, EF_ALGO_SIG);
|
|
datalen += parse_algo(algorithm_attr_p256r1, EF_ALGO_SIG);
|
|
datalen += parse_algo(algorithm_attr_p384r1, EF_ALGO_SIG);
|
|
datalen += parse_algo(algorithm_attr_p521r1, EF_ALGO_SIG);
|
|
datalen += parse_algo(algorithm_attr_bp256r1, EF_ALGO_SIG);
|
|
datalen += parse_algo(algorithm_attr_bp384r1, EF_ALGO_SIG);
|
|
datalen += parse_algo(algorithm_attr_bp512r1, EF_ALGO_SIG);
|
|
|
|
datalen += parse_algo(algorithm_attr_rsa1k, EF_ALGO_DEC);
|
|
datalen += parse_algo(algorithm_attr_rsa2k, EF_ALGO_DEC);
|
|
datalen += parse_algo(algorithm_attr_rsa3k, EF_ALGO_DEC);
|
|
datalen += parse_algo(algorithm_attr_rsa4k, EF_ALGO_DEC);
|
|
datalen += parse_algo(algorithm_attr_p256k1, EF_ALGO_DEC);
|
|
datalen += parse_algo(algorithm_attr_p256r1, EF_ALGO_DEC);
|
|
datalen += parse_algo(algorithm_attr_p384r1, EF_ALGO_DEC);
|
|
datalen += parse_algo(algorithm_attr_p521r1, EF_ALGO_DEC);
|
|
datalen += parse_algo(algorithm_attr_bp256r1, EF_ALGO_DEC);
|
|
datalen += parse_algo(algorithm_attr_bp384r1, EF_ALGO_DEC);
|
|
datalen += parse_algo(algorithm_attr_bp512r1, EF_ALGO_DEC);
|
|
datalen += parse_algo(algorithm_attr_cv25519, EF_ALGO_DEC);
|
|
datalen += parse_algo(algorithm_attr_x448, EF_ALGO_DEC);
|
|
|
|
datalen += parse_algo(algorithm_attr_rsa1k, EF_ALGO_AUT);
|
|
datalen += parse_algo(algorithm_attr_rsa2k, EF_ALGO_AUT);
|
|
datalen += parse_algo(algorithm_attr_rsa3k, EF_ALGO_AUT);
|
|
datalen += parse_algo(algorithm_attr_rsa4k, EF_ALGO_AUT);
|
|
datalen += parse_algo(algorithm_attr_p256k1, EF_ALGO_AUT);
|
|
datalen += parse_algo(algorithm_attr_p256r1, EF_ALGO_AUT);
|
|
datalen += parse_algo(algorithm_attr_p384r1, EF_ALGO_AUT);
|
|
datalen += parse_algo(algorithm_attr_p521r1, EF_ALGO_AUT);
|
|
datalen += parse_algo(algorithm_attr_bp256r1, EF_ALGO_SIG);
|
|
datalen += parse_algo(algorithm_attr_bp384r1, EF_ALGO_SIG);
|
|
datalen += parse_algo(algorithm_attr_bp512r1, EF_ALGO_SIG);
|
|
*lp = res_APDU+res_APDU_size-lp-1;
|
|
datalen = *lp;
|
|
}
|
|
else if (f->fid == EF_ALGO_SIG || f->fid == EF_ALGO_DEC || f->fid == EF_ALGO_AUT) {
|
|
uint16_t fid = 0x1000 | f->fid;
|
|
file_t *ef;
|
|
if (!(ef = search_by_fid(fid, NULL, SPECIFY_EF)) || !ef->data)
|
|
datalen += parse_algo(algorithm_attr_rsa2k, f->fid);
|
|
else {
|
|
uint16_t len = file_read_uint16(ef->data);
|
|
if (res_APDU_size > 0) {
|
|
res_APDU[res_APDU_size++] = f->fid & 0xff;
|
|
res_APDU[res_APDU_size++] = len & 0xff;
|
|
datalen += 2;
|
|
}
|
|
memcpy(res_APDU+res_APDU_size, file_read(ef->data+2), len);
|
|
res_APDU_size += len;
|
|
datalen += len;
|
|
}
|
|
}
|
|
return datalen;
|
|
}
|
|
|
|
int parse_app_data(const file_t *f, int mode) {
|
|
uint16_t fids[] = {
|
|
6,
|
|
EF_FULL_AID, EF_HIST_BYTES, EF_EXLEN_INFO, EF_GFM, EF_DISCRETE_DO, EF_KEY_INFO
|
|
};
|
|
res_APDU[res_APDU_size++] = EF_APP_DATA & 0xff;
|
|
res_APDU[res_APDU_size++] = 0x82;
|
|
uint8_t *lp = res_APDU+res_APDU_size;
|
|
res_APDU_size += 2;
|
|
uint16_t data_len = parse_do(fids, mode);
|
|
uint16_t lpdif = res_APDU+res_APDU_size-lp-2;
|
|
*lp++ = lpdif >> 8;
|
|
*lp++ = lpdif & 0xff;
|
|
return lpdif+4;
|
|
}
|
|
|
|
int parse_discrete_do(const file_t *f, int mode) {
|
|
uint16_t fids[] = {
|
|
8,
|
|
EF_EXT_CAP, EF_ALGO_SIG, EF_ALGO_DEC, EF_ALGO_AUT, EF_PW_STATUS, EF_FP, EF_CA_FP, EF_TS_ALL, //EF_UIF_SIG, EF_UIF_DEC, EF_UIF_AUT
|
|
};
|
|
res_APDU[res_APDU_size++] = EF_DISCRETE_DO & 0xff;
|
|
res_APDU[res_APDU_size++] = 0x82;
|
|
uint8_t *lp = res_APDU+res_APDU_size;
|
|
res_APDU_size += 2;
|
|
uint16_t data_len = parse_do(fids, mode);
|
|
uint16_t lpdif = res_APDU+res_APDU_size-lp-2;
|
|
*lp++ = lpdif >> 8;
|
|
*lp++ = lpdif & 0xff;
|
|
return lpdif+4;
|
|
}
|
|
|
|
static int cmd_get_data() {
|
|
if (apdu.cmd_apdu_data_len > 0)
|
|
return SW_WRONG_LENGTH();
|
|
uint16_t fid = (P1(apdu) << 8) | P2(apdu);
|
|
file_t *ef;
|
|
if (!(ef = search_by_fid(fid, NULL, SPECIFY_EF)))
|
|
return SW_FILE_NOT_FOUND();
|
|
if (!authenticate_action(ef, ACL_OP_READ_SEARCH)) {
|
|
return SW_SECURITY_STATUS_NOT_SATISFIED();
|
|
}
|
|
if (ef->data) {
|
|
uint16_t fids[] = {1,fid};
|
|
uint16_t data_len = parse_do(fids, 1);
|
|
if (apdu.expected_res_size > data_len)
|
|
apdu.expected_res_size = data_len;
|
|
}
|
|
return SW_OK();
|
|
}
|
|
|
|
int pin_reset_retries(const file_t *pin, bool force) {
|
|
if (!pin)
|
|
return CCID_ERR_NULL_PARAM;
|
|
file_t *pw_status = search_by_fid(EF_PW_PRIV, NULL, SPECIFY_EF);
|
|
if (!pw_status)
|
|
return CCID_ERR_FILE_NOT_FOUND;
|
|
uint8_t p[7];
|
|
memcpy(p, file_read(pw_status->data+2), 7);
|
|
uint8_t retries = p[3+(pin->fid&0x3)];
|
|
if (retries == 0 && force == false) //blocked
|
|
return CCID_ERR_BLOCKED;
|
|
p[3+(pin->fid&0x3)] = 3;
|
|
int r = flash_write_data_to_file(pw_status, p, file_read_uint16(pw_status->data));
|
|
low_flash_available();
|
|
return r;
|
|
}
|
|
|
|
int pin_wrong_retry(const file_t *pin) {
|
|
if (!pin)
|
|
return CCID_ERR_NULL_PARAM;
|
|
file_t *pw_status = search_by_fid(EF_PW_PRIV, NULL, SPECIFY_EF);
|
|
if (!pw_status)
|
|
return CCID_ERR_FILE_NOT_FOUND;
|
|
uint8_t p[7];
|
|
memcpy(p, file_read(pw_status->data+2), 7);
|
|
if (p[3+(pin->fid&0x3)] > 0) {
|
|
p[3+(pin->fid&0x3)] -= 1;
|
|
int r = flash_write_data_to_file(pw_status, p, file_read_uint16(pw_status->data));
|
|
if (r != CCID_OK)
|
|
return r;
|
|
low_flash_available();
|
|
if (p[3+(pin->fid&0x3)] == 0)
|
|
return CCID_ERR_BLOCKED;
|
|
return p[3+(pin->fid&0x3)];
|
|
}
|
|
return CCID_ERR_BLOCKED;
|
|
}
|
|
|
|
int check_pin(const file_t *pin, const uint8_t *data, size_t len) {
|
|
if (!pin)
|
|
return SW_REFERENCE_NOT_FOUND();
|
|
if (!pin->data) {
|
|
return SW_REFERENCE_NOT_FOUND();
|
|
}
|
|
isUserAuthenticated = false;
|
|
//has_pw1 = has_pw3 = false;
|
|
|
|
uint8_t dhash[32];
|
|
double_hash_pin(data, len, dhash);
|
|
if (sizeof(dhash) != file_read_uint16(pin->data)-1) //1 byte for pin len
|
|
return SW_CONDITIONS_NOT_SATISFIED();
|
|
if (memcmp(file_read(pin->data+3), dhash, sizeof(dhash)) != 0) {
|
|
int retries;
|
|
if ((retries = pin_wrong_retry(pin)) < CCID_OK)
|
|
return SW_PIN_BLOCKED();
|
|
return set_res_sw(0x63, 0xc0 | retries);
|
|
}
|
|
|
|
int r = pin_reset_retries(pin, false);
|
|
if (r == CCID_ERR_BLOCKED)
|
|
return SW_PIN_BLOCKED();
|
|
if (r != CCID_OK)
|
|
return SW_MEMORY_FAILURE();
|
|
isUserAuthenticated = true;
|
|
if (pin->fid == EF_PW1) {
|
|
if (P2(apdu) == 0x81)
|
|
has_pw1 = true;
|
|
else
|
|
has_pw2 = true;
|
|
}
|
|
else if (pin->fid == EF_PW3) {
|
|
has_pw3 = true;
|
|
hash_multi(data, len, session_pw3);
|
|
}
|
|
return SW_OK();
|
|
}
|
|
|
|
static int cmd_verify() {
|
|
uint8_t p1 = P1(apdu);
|
|
uint8_t p2 = P2(apdu);
|
|
|
|
if (p1 == 0xFF) {
|
|
if (apdu.cmd_apdu_data_len != 0)
|
|
return SW_WRONG_DATA();
|
|
if (p2 == 0x81)
|
|
has_pw1 = false;
|
|
else if (p2 == 0x82)
|
|
has_pw2 = false;
|
|
else if (p2 == 0x83)
|
|
has_pw3 = false;
|
|
return SW_OK();
|
|
}
|
|
else if (p1 != 0x0 || (p2 & 0x60) != 0x0)
|
|
return SW_WRONG_P1P2();
|
|
uint8_t qualifier = p2&0x1f;
|
|
uint16_t fid = 0x1000 | p2;
|
|
if (fid == EF_RC && apdu.cmd_apdu_data_len > 0)
|
|
fid = EF_PW1;
|
|
file_t *pw, *pw_status;
|
|
if (!(pw = search_by_fid(fid, NULL, SPECIFY_EF)))
|
|
return SW_REFERENCE_NOT_FOUND();
|
|
if (!(pw_status = search_by_fid(EF_PW_PRIV, NULL, SPECIFY_EF)))
|
|
return SW_REFERENCE_NOT_FOUND();
|
|
if (file_read_uint8(pw->data+2) == 0) //not initialized
|
|
return SW_REFERENCE_NOT_FOUND();
|
|
if (apdu.cmd_apdu_data_len > 0) {
|
|
return check_pin(pw, apdu.cmd_apdu_data, apdu.cmd_apdu_data_len);
|
|
}
|
|
uint8_t retries = file_read_uint8(pw_status->data+2+3+(fid&0x3));
|
|
if (retries == 0)
|
|
return SW_PIN_BLOCKED();
|
|
if ((p2 == 0x81 && has_pw1) || (p2 == 0x82 && has_pw2) || (p2 == 0x83 && has_pw3))
|
|
return SW_OK();
|
|
return set_res_sw(0x63, 0xc0 | retries);
|
|
}
|
|
|
|
static int cmd_put_data() {
|
|
uint16_t fid = (P1(apdu) << 8) | P2(apdu);
|
|
file_t *ef;
|
|
if (fid == EF_RESET_CODE)
|
|
fid = EF_RC;
|
|
else if (fid == EF_ALGO_SIG || fid == EF_ALGO_DEC || fid == EF_ALGO_AUT)
|
|
fid |= 0x1000;
|
|
if (!(ef = search_by_fid(fid, NULL, SPECIFY_EF)))
|
|
return SW_FILE_NOT_FOUND();
|
|
if (!authenticate_action(ef, ACL_OP_UPDATE_ERASE)) {
|
|
return SW_SECURITY_STATUS_NOT_SATISFIED();
|
|
}
|
|
if (fid == EF_PW_STATUS) {
|
|
fid = EF_PW_PRIV;
|
|
apdu.cmd_apdu_data_len = 4; //we silently ommit the reset parameters
|
|
}
|
|
if (apdu.cmd_apdu_data_len > 0 && (ef->type & FILE_DATA_FLASH)) {
|
|
int r = flash_write_data_to_file(ef, apdu.cmd_apdu_data, apdu.cmd_apdu_data_len);
|
|
if (r != CCID_OK)
|
|
return SW_MEMORY_FAILURE();
|
|
low_flash_available();
|
|
}
|
|
return SW_OK();
|
|
}
|
|
|
|
static int cmd_change_pin() {
|
|
if (P1(apdu) != 0x0)
|
|
return SW_WRONG_P1P2();
|
|
uint16_t fid = 0x1000 | P2(apdu);
|
|
file_t *pw;
|
|
if (!(pw = search_by_fid(fid, NULL, SPECIFY_EF)))
|
|
return SW_REFERENCE_NOT_FOUND();
|
|
uint8_t pin_len = file_read_uint8(pw->data+2);
|
|
uint16_t r = check_pin(pw, apdu.cmd_apdu_data, pin_len);
|
|
if (r != 0x9000)
|
|
return r;
|
|
uint8_t dhash[33];
|
|
dhash[0] = apdu.cmd_apdu_data_len-pin_len;
|
|
double_hash_pin(apdu.cmd_apdu_data+pin_len, apdu.cmd_apdu_data_len-pin_len, dhash+1);
|
|
flash_write_data_to_file(pw, dhash, sizeof(dhash));
|
|
low_flash_available();
|
|
return SW_OK();
|
|
}
|
|
|
|
static int cmd_reset_retry() {
|
|
if (P2(apdu) != 0x81)
|
|
return SW_REFERENCE_NOT_FOUND();
|
|
if (P1(apdu) == 0x0 || P1(apdu) == 0x2) {
|
|
int newpin_len = 0;
|
|
file_t *pw = NULL;
|
|
if (!(pw = search_by_fid(EF_PW1, NULL, SPECIFY_EF)))
|
|
return SW_REFERENCE_NOT_FOUND();
|
|
if (P1(apdu) == 0x0) {
|
|
file_t *rc, *pw;
|
|
if (!(rc = search_by_fid(EF_RC, NULL, SPECIFY_EF)))
|
|
return SW_REFERENCE_NOT_FOUND();
|
|
uint8_t pin_len = file_read_uint8(rc->data+2);
|
|
if (apdu.cmd_apdu_data_len <= pin_len)
|
|
return SW_WRONG_LENGTH();
|
|
uint16_t r = check_pin(rc, apdu.cmd_apdu_data, pin_len);
|
|
if (r != 0x9000)
|
|
return r;
|
|
newpin_len = apdu.cmd_apdu_data_len-pin_len;
|
|
}
|
|
else if (P1(apdu) == 0x2) {
|
|
if (!has_pw3)
|
|
return SW_CONDITIONS_NOT_SATISFIED();
|
|
newpin_len = apdu.cmd_apdu_data_len;
|
|
}
|
|
uint8_t dhash[33];
|
|
dhash[0] = newpin_len;
|
|
double_hash_pin(apdu.cmd_apdu_data+(apdu.cmd_apdu_data_len-newpin_len), newpin_len, dhash+1);
|
|
flash_write_data_to_file(pw, dhash, sizeof(dhash));
|
|
if (pin_reset_retries(pw, true) != CCID_OK)
|
|
return SW_MEMORY_FAILURE();
|
|
low_flash_available();
|
|
return SW_OK();
|
|
}
|
|
return SW_INCORRECT_P1P2();
|
|
}
|
|
|
|
int store_keys(void *key_ctx, int type, uint16_t key_id) {
|
|
int r, key_size;
|
|
uint8_t kdata[4096/8]; //worst
|
|
|
|
//if (!has_pw3)
|
|
// return CCID_NO_LOGIN;
|
|
//file_t *pw3 = search_by_fid(EF_PW3, NULL, SPECIFY_EF);
|
|
//if (!pw3)
|
|
// return CCID_ERR_FILE_NOT_FOUND;
|
|
file_t *ef = search_by_fid(key_id, NULL, SPECIFY_EF);
|
|
if (!ef)
|
|
return CCID_ERR_FILE_NOT_FOUND;
|
|
if (type == ALGO_RSA) {
|
|
mbedtls_rsa_context *rsa = (mbedtls_rsa_context *)key_ctx;
|
|
key_size = mbedtls_mpi_size(&rsa->P)+mbedtls_mpi_size(&rsa->Q);
|
|
mbedtls_mpi_write_binary(&rsa->P, kdata, key_size/2);
|
|
mbedtls_mpi_write_binary(&rsa->Q, kdata+key_size/2, key_size/2);
|
|
}
|
|
else if (type == ALGO_ECDSA || type == ALGO_ECDH) {
|
|
mbedtls_ecdsa_context *ecdsa = (mbedtls_ecdsa_context *)key_ctx;
|
|
key_size = mbedtls_mpi_size(&ecdsa->d);
|
|
kdata[0] = ecdsa->grp.id & 0xff;
|
|
mbedtls_mpi_write_binary(&ecdsa->d, kdata+1, key_size);
|
|
key_size++;
|
|
}
|
|
else if (type & ALGO_AES) {
|
|
if (type == ALGO_AES_128)
|
|
key_size = 16;
|
|
else if (type == ALGO_AES_192)
|
|
key_size = 24;
|
|
else if (type == ALGO_AES_256)
|
|
key_size = 32;
|
|
memcpy(kdata, key_ctx, key_size);
|
|
}
|
|
//r = aes_encrypt_cfb_256(file_read(pw3->data+2), session_pw3, kdata, key_size);
|
|
//if (r != CCID_OK)
|
|
// return r;
|
|
r = flash_write_data_to_file(ef, kdata, key_size);
|
|
if (r != CCID_OK)
|
|
return r;
|
|
low_flash_available();
|
|
return CCID_OK;
|
|
}
|
|
|
|
int load_private_key_rsa(mbedtls_rsa_context *ctx, file_t *fkey) {
|
|
//wait_button();
|
|
int key_size = file_read_uint16(fkey->data);
|
|
uint8_t kdata[4096/8];
|
|
//if (!has_pw3)
|
|
// return CCID_NO_LOGIN;
|
|
//file_t *pw3 = search_by_fid(EF_PW3, NULL, SPECIFY_EF);
|
|
//if (!pw3)
|
|
// return CCID_ERR_FILE_NOT_FOUND;
|
|
memcpy(kdata, file_read(fkey->data+2), key_size);
|
|
//int r = aes_decrypt_cfb_256(file_read(pw3->data+2), session_pw3, kdata, key_size);
|
|
//if (r != CCID_OK)
|
|
// return r;
|
|
if (mbedtls_mpi_read_binary(&ctx->P, kdata, key_size/2) != 0) {
|
|
mbedtls_rsa_free(ctx);
|
|
return CCID_WRONG_DATA;
|
|
}
|
|
if (mbedtls_mpi_read_binary(&ctx->Q, kdata+key_size/2, key_size/2) != 0) {
|
|
mbedtls_rsa_free(ctx);
|
|
return CCID_WRONG_DATA;
|
|
}
|
|
if (mbedtls_mpi_lset(&ctx->E, 0x10001) != 0) {
|
|
mbedtls_rsa_free(ctx);
|
|
return CCID_EXEC_ERROR;
|
|
}
|
|
if (mbedtls_rsa_import(ctx, NULL, &ctx->P, &ctx->Q, NULL, &ctx->E) != 0) {
|
|
mbedtls_rsa_free(ctx);
|
|
return CCID_WRONG_DATA;
|
|
}
|
|
if (mbedtls_rsa_complete(ctx) != 0) {
|
|
mbedtls_rsa_free(ctx);
|
|
return CCID_WRONG_DATA;
|
|
}
|
|
if (mbedtls_rsa_check_privkey(ctx) != 0) {
|
|
mbedtls_rsa_free(ctx);
|
|
return CCID_WRONG_DATA;
|
|
}
|
|
return CCID_OK;
|
|
}
|
|
|
|
int load_private_key_ecdsa(mbedtls_ecdsa_context *ctx, file_t *fkey) {
|
|
//wait_button();
|
|
int key_size = file_read_uint16(fkey->data);
|
|
uint8_t kdata[67]; //Worst case, 521 bit + 1byte
|
|
memcpy(kdata, file_read(fkey->data+2), key_size);
|
|
mbedtls_ecp_group_id gid = kdata[0];
|
|
int r = mbedtls_ecp_read_key(gid, ctx, kdata+1, key_size-1);
|
|
if (r != 0) {
|
|
mbedtls_ecdsa_free(ctx);
|
|
return CCID_EXEC_ERROR;
|
|
}
|
|
return CCID_OK;
|
|
}
|
|
|
|
mbedtls_ecp_group_id get_ec_group_id_from_attr(const uint8_t *algo, size_t algo_len) {
|
|
if (memcmp(algorithm_attr_p256k1+2, algo, algo_len) == 0)
|
|
return MBEDTLS_ECP_DP_SECP256K1;
|
|
else if (memcmp(algorithm_attr_p256r1+2, algo, algo_len) == 0)
|
|
return MBEDTLS_ECP_DP_SECP256R1;
|
|
else if (memcmp(algorithm_attr_p384r1+2, algo, algo_len) == 0)
|
|
return MBEDTLS_ECP_DP_SECP384R1;
|
|
else if (memcmp(algorithm_attr_p521r1+2, algo, algo_len) == 0)
|
|
return MBEDTLS_ECP_DP_SECP521R1;
|
|
else if (memcmp(algorithm_attr_bp256r1+2, algo, algo_len) == 0)
|
|
return MBEDTLS_ECP_DP_BP256R1;
|
|
else if (memcmp(algorithm_attr_bp384r1+2, algo, algo_len) == 0)
|
|
return MBEDTLS_ECP_DP_BP384R1;
|
|
else if (memcmp(algorithm_attr_bp512r1+2, algo, algo_len) == 0)
|
|
return MBEDTLS_ECP_DP_BP512R1;
|
|
else if (memcmp(algorithm_attr_cv25519+2, algo, algo_len) == 0)
|
|
return MBEDTLS_ECP_DP_CURVE25519;
|
|
else if (memcmp(algorithm_attr_x448+2, algo, algo_len) == 0)
|
|
return MBEDTLS_ECP_DP_CURVE448;
|
|
return MBEDTLS_ECP_DP_NONE;
|
|
}
|
|
|
|
void make_rsa_response(mbedtls_rsa_context *rsa) {
|
|
memcpy(res_APDU, "\x7f\x49\x82\x00\x00", 5);
|
|
res_APDU_size = 5;
|
|
res_APDU[res_APDU_size++] = 0x81;
|
|
res_APDU[res_APDU_size++] = 0x82;
|
|
put_uint16_t(mbedtls_mpi_size(&rsa->N), res_APDU+res_APDU_size); res_APDU_size += 2;
|
|
mbedtls_mpi_write_binary(&rsa->N, res_APDU+res_APDU_size, mbedtls_mpi_size(&rsa->N)); res_APDU_size += mbedtls_mpi_size(&rsa->N);
|
|
res_APDU[res_APDU_size++] = 0x82;
|
|
res_APDU[res_APDU_size++] = mbedtls_mpi_size(&rsa->E) & 0xff;
|
|
mbedtls_mpi_write_binary(&rsa->E, res_APDU+res_APDU_size, mbedtls_mpi_size(&rsa->E)); res_APDU_size += mbedtls_mpi_size(&rsa->E);
|
|
put_uint16_t(res_APDU_size-5, res_APDU+3);
|
|
}
|
|
|
|
void make_ecdsa_response(mbedtls_ecdsa_context *ecdsa) {
|
|
size_t plen = mbedtls_mpi_size(&ecdsa->grp.P);
|
|
memcpy(res_APDU, "\x7f\x49\x81\x00", 4);
|
|
res_APDU_size = 4;
|
|
res_APDU[res_APDU_size++] = 0x86;
|
|
res_APDU[res_APDU_size++] = 0x81;
|
|
res_APDU[res_APDU_size++] = 2*plen+1;
|
|
res_APDU[res_APDU_size++] = 0x04;
|
|
mbedtls_mpi_write_binary(&ecdsa->Q.X, res_APDU+res_APDU_size, plen); res_APDU_size += plen;
|
|
mbedtls_mpi_write_binary(&ecdsa->Q.Y, res_APDU+res_APDU_size, plen); res_APDU_size += plen;
|
|
res_APDU[3] = res_APDU_size-4;
|
|
}
|
|
|
|
static int cmd_keypair_gen() {
|
|
if (P2(apdu) != 0x0)
|
|
return SW_INCORRECT_P1P2();
|
|
if (apdu.cmd_apdu_data_len != 2 && apdu.cmd_apdu_data_len != 5)
|
|
return SW_WRONG_LENGTH();
|
|
if (!has_pw3 && P1(apdu) == 0x80)
|
|
return SW_SECURITY_STATUS_NOT_SATISFIED();
|
|
|
|
uint16_t fid = 0x0;
|
|
int r = CCID_OK;
|
|
if (apdu.cmd_apdu_data[0] == 0xB6)
|
|
fid = EF_PK_SIG;
|
|
else if (apdu.cmd_apdu_data[0] == 0xB8)
|
|
fid = EF_PK_DEC;
|
|
else if (apdu.cmd_apdu_data[0] == 0xA4)
|
|
fid = EF_PK_AUT;
|
|
else
|
|
return SW_WRONG_DATA();
|
|
|
|
file_t *algo_ef = search_by_fid(fid-0x0010, NULL, SPECIFY_EF);
|
|
if (!algo_ef)
|
|
return SW_FILE_NOT_FOUND();
|
|
const uint8_t *algo = algorithm_attr_rsa2k+1;
|
|
uint16_t algo_len = algorithm_attr_rsa2k[0];
|
|
if (algo_ef && algo_ef->data) {
|
|
algo = file_read(algo_ef->data+2);
|
|
algo_len = file_read_uint16(algo_ef->data);
|
|
}
|
|
if (P1(apdu) == 0x80) { //generate
|
|
if (algo[0] == ALGO_RSA) {
|
|
int exponent = 65537, nlen = (algo[1] << 8) | algo[2];
|
|
printf("KEYPAIR RSA %d\r\n",nlen);
|
|
//if (nlen != 2048 && nlen != 4096)
|
|
// return SW_FUNC_NOT_SUPPORTED();
|
|
mbedtls_rsa_context rsa;
|
|
mbedtls_rsa_init(&rsa);
|
|
uint8_t index = 0;
|
|
r = mbedtls_rsa_gen_key(&rsa, random_gen, &index, nlen, exponent);
|
|
printf("r %d\r\n",r);
|
|
if (r != 0) {
|
|
mbedtls_rsa_free(&rsa);
|
|
return SW_EXEC_ERROR();
|
|
}
|
|
r = store_keys(&rsa, ALGO_RSA, fid);
|
|
printf("r %d\r\n",r);
|
|
make_rsa_response(&rsa);
|
|
mbedtls_rsa_free(&rsa);
|
|
if (r != CCID_OK)
|
|
return SW_EXEC_ERROR();
|
|
}
|
|
else if (algo[0] == ALGO_ECDH || algo[0] == ALGO_ECDSA) {
|
|
printf("KEYPAIR ECDSA\r\n");
|
|
mbedtls_ecp_group_id gid = get_ec_group_id_from_attr(algo+1, algo_len-1);
|
|
if (gid == MBEDTLS_ECP_DP_NONE)
|
|
return SW_FUNC_NOT_SUPPORTED();
|
|
mbedtls_ecdsa_context ecdsa;
|
|
mbedtls_ecdsa_init(&ecdsa);
|
|
uint8_t index = 0;
|
|
r = mbedtls_ecdsa_genkey(&ecdsa, gid, random_gen, &index);
|
|
if (r != 0) {
|
|
mbedtls_ecdsa_free(&ecdsa);
|
|
return SW_EXEC_ERROR();
|
|
}
|
|
r = store_keys(&ecdsa, algo[0], fid);
|
|
make_ecdsa_response(&ecdsa);
|
|
mbedtls_ecdsa_free(&ecdsa);
|
|
if (r != CCID_OK)
|
|
return SW_EXEC_ERROR();
|
|
}
|
|
else
|
|
return SW_FUNC_NOT_SUPPORTED();
|
|
file_t *pbef = search_by_fid(fid+3, NULL, SPECIFY_EF);
|
|
if (!pbef)
|
|
return SW_FILE_NOT_FOUND();
|
|
r = flash_write_data_to_file(pbef, res_APDU, res_APDU_size);
|
|
if (r != CCID_OK)
|
|
return SW_EXEC_ERROR();
|
|
if (fid == EF_PK_SIG)
|
|
reset_sig_count();
|
|
low_flash_available();
|
|
return SW_OK();
|
|
}
|
|
else if (P1(apdu) == 0x81) { //read
|
|
file_t *ef = search_by_fid(fid+3, NULL, SPECIFY_EF);
|
|
if (!ef || !ef->data)
|
|
return SW_FILE_NOT_FOUND();
|
|
res_APDU_size = file_read_uint16(ef->data);
|
|
memcpy(res_APDU, file_read(ef->data+2), res_APDU_size);
|
|
return SW_OK();
|
|
}
|
|
return SW_INCORRECT_P1P2();
|
|
}
|
|
|
|
int rsa_sign(mbedtls_rsa_context *ctx, const uint8_t *data, size_t data_len, uint8_t *out, size_t *out_len) {
|
|
uint8_t *d = (uint8_t *)data, *end = d+data_len, *hsh = NULL;
|
|
size_t seq_len = 0, hash_len = 0;
|
|
int key_size = ctx->len, r = 0;
|
|
mbedtls_md_type_t md = MBEDTLS_MD_SHA256;
|
|
if (mbedtls_asn1_get_tag(&d, end, &seq_len, MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE) == 0) {
|
|
mbedtls_asn1_buf mdb;
|
|
r = mbedtls_asn1_get_alg_null(&d, end, &mdb);
|
|
if (r == 0) {
|
|
if (mbedtls_asn1_get_tag(&d, end, &hash_len, MBEDTLS_ASN1_OCTET_STRING) == 0) {
|
|
if (memcmp(mdb.p, "\x2B\x0E\x03\x02\x1A", 5) == 0)
|
|
md = MBEDTLS_MD_SHA1;
|
|
else if (memcmp(mdb.p, "\x60\x86\x48\x01\x65\x03\x04\x02\x04", 9) == 0)
|
|
md = MBEDTLS_MD_SHA224;
|
|
else if (memcmp(mdb.p, "\x60\x86\x48\x01\x65\x03\x04\x02\x01", 9) == 0)
|
|
md = MBEDTLS_MD_SHA256;
|
|
else if (memcmp(mdb.p, "\x60\x86\x48\x01\x65\x03\x04\x02\x02", 9) == 0)
|
|
md = MBEDTLS_MD_SHA384;
|
|
else if (memcmp(mdb.p, "\x60\x86\x48\x01\x65\x03\x04\x02\x03", 9) == 0)
|
|
md = MBEDTLS_MD_SHA512;
|
|
hsh = d;
|
|
}
|
|
}
|
|
}
|
|
if (md == MBEDTLS_MD_NONE) {
|
|
if (data_len == 32)
|
|
md = MBEDTLS_MD_SHA256;
|
|
else if (data_len == 20)
|
|
md = MBEDTLS_MD_SHA1;
|
|
else if (data_len == 28)
|
|
md = MBEDTLS_MD_SHA224;
|
|
else if (data_len == 48)
|
|
md = MBEDTLS_MD_SHA384;
|
|
else if (data_len == 64)
|
|
md = MBEDTLS_MD_SHA512;
|
|
hash_len = data_len;
|
|
hsh = (uint8_t *)data;
|
|
}
|
|
if (md == MBEDTLS_MD_NONE) {
|
|
if (data_len < key_size) //needs padding
|
|
memset((uint8_t *)data+data_len, 0, key_size-data_len);
|
|
r = mbedtls_rsa_private(ctx, random_gen, NULL, data, out);
|
|
}
|
|
else {
|
|
uint8_t *signature = (uint8_t *)calloc(key_size, sizeof(uint8_t));
|
|
r = mbedtls_rsa_pkcs1_sign(ctx, random_gen, NULL, md, hash_len, hsh, signature);
|
|
memcpy(out, signature, key_size);
|
|
free(signature);
|
|
}
|
|
*out_len = key_size;
|
|
inc_sig_count();
|
|
return r;
|
|
}
|
|
|
|
int ecdsa_sign(mbedtls_ecdsa_context *ctx, const uint8_t *data, size_t data_len, uint8_t *out, size_t *out_len) {
|
|
mbedtls_md_type_t md = MBEDTLS_MD_SHA256;
|
|
if (data_len == 32)
|
|
md = MBEDTLS_MD_SHA256;
|
|
else if (data_len == 20)
|
|
md = MBEDTLS_MD_SHA1;
|
|
else if (data_len == 28)
|
|
md = MBEDTLS_MD_SHA224;
|
|
else if (data_len == 48)
|
|
md = MBEDTLS_MD_SHA384;
|
|
else if (data_len == 64)
|
|
md = MBEDTLS_MD_SHA512;
|
|
mbedtls_mpi ri, si;
|
|
mbedtls_mpi_init(&ri);
|
|
mbedtls_mpi_init(&si);
|
|
int r = mbedtls_ecdsa_sign(&ctx->grp, &ri, &si, &ctx->d, data, data_len, random_gen, NULL);
|
|
if (r == 0) {
|
|
mbedtls_mpi_write_binary(&ri, out, mbedtls_mpi_size(&ri));
|
|
*out_len = mbedtls_mpi_size(&ri);
|
|
mbedtls_mpi_write_binary(&si, out+*out_len, mbedtls_mpi_size(&si));
|
|
*out_len += mbedtls_mpi_size(&si);
|
|
}
|
|
mbedtls_mpi_free(&ri);
|
|
mbedtls_mpi_free(&si);
|
|
inc_sig_count();
|
|
return r;
|
|
}
|
|
|
|
static int cmd_pso() {
|
|
uint16_t algo_fid = 0x0, pk_fid = 0x0;
|
|
if (P1(apdu) == 0x9E && P2(apdu) == 0x9A) {
|
|
if (!has_pw3 && !has_pw1)
|
|
return SW_SECURITY_STATUS_NOT_SATISFIED();
|
|
algo_fid = EF_ALGO_PRIV1;
|
|
pk_fid = EF_PK_SIG;
|
|
}
|
|
else if (P1(apdu) == 0x80 && P2(apdu) == 0x86) {
|
|
if (!has_pw3 && !has_pw2)
|
|
return SW_SECURITY_STATUS_NOT_SATISFIED();
|
|
algo_fid = EF_ALGO_PRIV2;
|
|
pk_fid = EF_PK_DEC;
|
|
}
|
|
else
|
|
return SW_INCORRECT_P1P2();
|
|
file_t *algo_ef = search_by_fid(algo_fid, NULL, SPECIFY_EF);
|
|
if (!algo_ef)
|
|
return SW_FILE_NOT_FOUND();
|
|
const uint8_t *algo = algorithm_attr_rsa2k+1;
|
|
uint16_t algo_len = algorithm_attr_rsa2k[0];
|
|
if (algo_ef && algo_ef->data) {
|
|
algo_len = file_read_uint16(algo_ef->data);
|
|
algo = file_read(algo_ef->data+2);
|
|
}
|
|
file_t *ef = search_by_fid(pk_fid, NULL, SPECIFY_EF);
|
|
if (!ef)
|
|
return SW_FILE_NOT_FOUND();
|
|
int r = CCID_OK;
|
|
int key_size = file_read_uint16(ef->data);
|
|
if (algo[0] == ALGO_RSA) {
|
|
mbedtls_rsa_context ctx;
|
|
mbedtls_rsa_init(&ctx);
|
|
r = load_private_key_rsa(&ctx, ef);
|
|
if (r != CCID_OK)
|
|
return SW_EXEC_ERROR();
|
|
if (P1(apdu) == 0x9E && P2(apdu) == 0x9A) {
|
|
size_t olen = 0;
|
|
r = rsa_sign(&ctx, apdu.cmd_apdu_data, apdu.cmd_apdu_data_len, res_APDU, &olen);
|
|
mbedtls_rsa_free(&ctx);
|
|
if (r != 0)
|
|
return SW_EXEC_ERROR();
|
|
res_APDU_size = olen;
|
|
//apdu.expected_res_size = key_size;
|
|
}
|
|
else if (P1(apdu) == 0x80 && P2(apdu) == 0x86) {
|
|
if (apdu.cmd_apdu_data_len < key_size) //needs padding
|
|
memset(apdu.cmd_apdu_data+apdu.cmd_apdu_data_len, 0, key_size-apdu.cmd_apdu_data_len);
|
|
size_t olen = 0;
|
|
r = mbedtls_rsa_pkcs1_decrypt(&ctx, random_gen, NULL, &olen, apdu.cmd_apdu_data+1, res_APDU, key_size);
|
|
mbedtls_rsa_free(&ctx);
|
|
if (r != 0) {
|
|
return SW_EXEC_ERROR();
|
|
}
|
|
res_APDU_size = olen;
|
|
}
|
|
}
|
|
else if (algo[0] == ALGO_ECDH || algo[0] == ALGO_ECDSA) {
|
|
if (P1(apdu) == 0x9E && P2(apdu) == 0x9A) {
|
|
mbedtls_ecdsa_context ctx;
|
|
mbedtls_ecdsa_init(&ctx);
|
|
r = load_private_key_ecdsa(&ctx, ef);
|
|
if (r != CCID_OK)
|
|
return SW_CONDITIONS_NOT_SATISFIED();
|
|
size_t olen = 0;
|
|
r = ecdsa_sign(&ctx, apdu.cmd_apdu_data, apdu.cmd_apdu_data_len, res_APDU, &olen);
|
|
mbedtls_ecdsa_free(&ctx);
|
|
if (r != 0)
|
|
return SW_EXEC_ERROR();
|
|
res_APDU_size = olen;
|
|
}
|
|
else if (P1(apdu) == 0x80 && P2(apdu) == 0x86) {
|
|
mbedtls_ecdh_context ctx;
|
|
uint8_t kdata[67];
|
|
uint8_t *data = apdu.cmd_apdu_data, *end = data+apdu.cmd_apdu_data_len;
|
|
size_t len = 0;
|
|
if (mbedtls_asn1_get_tag(&data, end, &len, 0xA6) != 0)
|
|
return SW_WRONG_DATA();
|
|
if (*data++ != 0x7f)
|
|
return SW_WRONG_DATA();
|
|
if (mbedtls_asn1_get_tag(&data, end, &len, 0x49) != 0 || mbedtls_asn1_get_tag(&data, end, &len, 0x86) != 0)
|
|
return SW_WRONG_DATA();
|
|
if (len != 2*key_size-1)
|
|
return SW_WRONG_LENGTH();
|
|
memcpy(kdata, file_read(ef->data+2), key_size);
|
|
mbedtls_ecdh_init(&ctx);
|
|
mbedtls_ecp_group_id gid = kdata[0];
|
|
r = mbedtls_ecdh_setup(&ctx, gid);
|
|
if (r != 0) {
|
|
mbedtls_ecdh_free(&ctx);
|
|
return SW_DATA_INVALID();
|
|
}
|
|
r = mbedtls_mpi_read_binary(&ctx.ctx.mbed_ecdh.d, kdata+1, key_size-1);
|
|
if (r != 0) {
|
|
mbedtls_ecdh_free(&ctx);
|
|
return SW_DATA_INVALID();
|
|
}
|
|
r = mbedtls_ecdh_read_public(&ctx, data-1, len+1);
|
|
if (r != 0) {
|
|
mbedtls_ecdh_free(&ctx);
|
|
return SW_DATA_INVALID();
|
|
}
|
|
size_t olen = 0;
|
|
r = mbedtls_ecdh_calc_secret(&ctx, &olen, res_APDU, MBEDTLS_ECP_MAX_BYTES, random_gen, NULL);
|
|
if (r != 0) {
|
|
mbedtls_ecdh_free(&ctx);
|
|
return SW_EXEC_ERROR();
|
|
}
|
|
res_APDU_size = olen;
|
|
mbedtls_ecdh_free(&ctx);
|
|
}
|
|
}
|
|
return SW_OK();
|
|
}
|
|
|
|
static int cmd_terminate_df() {
|
|
if (P1(apdu) != 0x0 && P2(apdu) != 0x0)
|
|
return SW_INCORRECT_P1P2();
|
|
file_t *retries;
|
|
if (!(retries = search_by_fid(EF_PW_PRIV, NULL, SPECIFY_EF)))
|
|
return SW_REFERENCE_NOT_FOUND();
|
|
if (!has_pw3 && file_read_uint8(retries->data+2+6) > 0)
|
|
return SW_SECURITY_STATUS_NOT_SATISFIED();
|
|
if (apdu.cmd_apdu_data_len != 0)
|
|
return SW_WRONG_LENGTH();
|
|
initialize_flash(true);
|
|
scan_files();
|
|
return SW_OK();
|
|
}
|
|
|
|
static int cmd_activate_file() {
|
|
return SW_OK();
|
|
}
|
|
|
|
static int cmd_challenge() {
|
|
uint8_t *rb = (uint8_t *)random_bytes_get(apdu.expected_res_size);
|
|
if (!rb)
|
|
return SW_WRONG_LENGTH();
|
|
memcpy(res_APDU, rb, apdu.expected_res_size);
|
|
res_APDU_size = apdu.expected_res_size;
|
|
return SW_OK();
|
|
}
|
|
|
|
static int cmd_internal_aut() {
|
|
if (P1(apdu) != 0x00 || P2(apdu) != 0x00)
|
|
return SW_WRONG_P1P2();
|
|
if (!has_pw3 && !has_pw2)
|
|
return SW_SECURITY_STATUS_NOT_SATISFIED();
|
|
file_t *algo_ef = search_by_fid(EF_ALGO_PRIV3, NULL, SPECIFY_EF);
|
|
if (!algo_ef)
|
|
return SW_FILE_NOT_FOUND();
|
|
const uint8_t *algo = algorithm_attr_rsa2k+1;
|
|
uint16_t algo_len = algorithm_attr_rsa2k[0];
|
|
if (algo_ef && algo_ef->data) {
|
|
algo_len = file_read_uint16(algo_ef->data);
|
|
algo = file_read(algo_ef->data+2);
|
|
}
|
|
file_t *ef = search_by_fid(EF_PK_AUT, NULL, SPECIFY_EF);
|
|
if (!ef)
|
|
return SW_FILE_NOT_FOUND();
|
|
int r = CCID_OK;
|
|
if (algo[0] == ALGO_RSA) {
|
|
mbedtls_rsa_context ctx;
|
|
mbedtls_rsa_init(&ctx);
|
|
r = load_private_key_rsa(&ctx, ef);
|
|
if (r != CCID_OK)
|
|
return SW_EXEC_ERROR();
|
|
size_t olen = 0;
|
|
r = rsa_sign(&ctx, apdu.cmd_apdu_data, apdu.cmd_apdu_data_len, res_APDU, &olen);
|
|
mbedtls_rsa_free(&ctx);
|
|
if (r != 0)
|
|
return SW_EXEC_ERROR();
|
|
res_APDU_size = olen;
|
|
}
|
|
else if (algo[0] == ALGO_ECDH || algo[0] == ALGO_ECDSA) {
|
|
mbedtls_ecdsa_context ctx;
|
|
mbedtls_ecdsa_init(&ctx);
|
|
r = load_private_key_ecdsa(&ctx, ef);
|
|
if (r != CCID_OK)
|
|
return SW_CONDITIONS_NOT_SATISFIED();
|
|
size_t olen = 0;
|
|
r = ecdsa_sign(&ctx, apdu.cmd_apdu_data, apdu.cmd_apdu_data_len, res_APDU, &olen);
|
|
mbedtls_ecdsa_free(&ctx);
|
|
if (r != 0)
|
|
return SW_EXEC_ERROR();
|
|
res_APDU_size = olen;
|
|
}
|
|
return SW_OK();
|
|
}
|
|
|
|
typedef struct cmd
|
|
{
|
|
uint8_t ins;
|
|
int (*cmd_handler)();
|
|
} cmd_t;
|
|
|
|
#define INS_VERIFY 0x20
|
|
#define INS_CHANGE_PIN 0x24
|
|
#define INS_PSO 0x2A
|
|
#define INS_RESET_RETRY 0x2C
|
|
#define INS_ACTIVATE_FILE 0x44
|
|
#define INS_KEYPAIR_GEN 0x47
|
|
#define INS_CHALLENGE 0x84
|
|
#define INS_INTERNAL_AUT 0x88
|
|
#define INS_SELECT 0xA4
|
|
#define INS_GET_DATA 0xCA
|
|
#define INS_PUT_DATA 0xDA
|
|
#define INS_TERMINATE_DF 0xE6
|
|
|
|
static const cmd_t cmds[] = {
|
|
{ INS_GET_DATA, cmd_get_data },
|
|
{ INS_SELECT, cmd_select },
|
|
{ INS_VERIFY, cmd_verify },
|
|
{ INS_PUT_DATA, cmd_put_data },
|
|
{ INS_CHANGE_PIN, cmd_change_pin },
|
|
{ INS_RESET_RETRY, cmd_reset_retry },
|
|
{ INS_KEYPAIR_GEN, cmd_keypair_gen },
|
|
{ INS_PSO, cmd_pso },
|
|
{ INS_TERMINATE_DF, cmd_terminate_df },
|
|
{ INS_ACTIVATE_FILE, cmd_activate_file },
|
|
{ INS_CHALLENGE, cmd_challenge },
|
|
{ INS_INTERNAL_AUT, cmd_internal_aut },
|
|
{ 0x00, 0x0}
|
|
};
|
|
|
|
int openpgp_process_apdu() {
|
|
int r = sm_unwrap();
|
|
for (const cmd_t *cmd = cmds; cmd->ins != 0x00; cmd++) {
|
|
if (cmd->ins == INS(apdu)) {
|
|
int r = cmd->cmd_handler();
|
|
sm_wrap();
|
|
return r;
|
|
}
|
|
}
|
|
return SW_INS_NOT_SUPPORTED();
|
|
} |