1922 lines
64 KiB
C
1922 lines
64 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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#include "asn1.h"
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#include "usb.h"
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#include "ccid/ccid.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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bool has_rc = false;
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uint8_t session_pw1[32];
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uint8_t session_rc[32];
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uint8_t session_pw3[32];
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static uint8_t dek[IV_SIZE+32];
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static uint16_t algo_dec = EF_ALGO_PRIV2, algo_aut = EF_ALGO_PRIV3, pk_dec = EF_PK_DEC, pk_aut = EF_PK_AUT;
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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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extern uint32_t board_button_read(void);
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static bool wait_button_pressed(uint16_t fid) {
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uint32_t val = EV_PRESS_BUTTON;
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#ifndef ENABLE_EMULATION
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file_t *ef = search_by_fid(fid, NULL, SPECIFY_ANY);
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if (ef && ef->data && file_get_data(ef)[0] > 0) {
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queue_try_add(&card_to_usb_q, &val);
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do {
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queue_remove_blocking(&usb_to_card_q, &val);
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}
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while (val != EV_BUTTON_PRESSED && val != EV_BUTTON_TIMEOUT);
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}
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#endif
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return val == EV_BUTTON_TIMEOUT;
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}
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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.nc >= 2)
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fid = get_uint16_t(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.nc == 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.nc == 2) {
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if (!(pe = search_by_fid(fid, NULL, SPECIFY_ANY))) {
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return SW_REFERENCE_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_REFERENCE_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_REFERENCE_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.nc != 0)
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return SW_REFERENCE_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.data, apdu.nc))) {
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return SW_REFERENCE_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.data, apdu.nc, MF))) {
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return SW_REFERENCE_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.data, apdu.nc, currentDF))) {
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return SW_REFERENCE_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,0);
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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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#ifndef ENABLE_EMULATION
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pico_get_unique_board_id_string((char *)ef->data+12, 4);
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#else
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memset((char *)ef->data + 12, 0, 4);
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#endif
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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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printf("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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printf("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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printf("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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printf("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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printf("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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if ((ef = search_by_fid(EF_DEK, NULL, SPECIFY_ANY))) {
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if (!ef->data) {
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printf("DEK is empty\r\n");
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const uint8_t def1[6] = { 0x31,0x32,0x33,0x34,0x35,0x36 };
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const uint8_t def3[8] = { 0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38 };
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uint8_t def[IV_SIZE+32+32+32];
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const uint8_t *dek = random_bytes_get(IV_SIZE+32);
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memcpy(def, dek, IV_SIZE+32);
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memcpy(def+IV_SIZE+32, dek+IV_SIZE, 32);
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hash_multi(def1, sizeof(def1), session_pw1);
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aes_encrypt_cfb_256(session_pw1, def, def+IV_SIZE, 32);
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memset(session_pw1, 0, sizeof(session_pw1));
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hash_multi(def3, sizeof(def3), session_pw3);
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aes_encrypt_cfb_256(session_pw3, def, def+IV_SIZE+32, 32);
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aes_encrypt_cfb_256(session_pw3, def, def+IV_SIZE+32+32, 32);
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memset(session_pw3, 0, sizeof(session_pw3));
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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_UIF_SIG, NULL, SPECIFY_ANY))) {
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if (!ef->data) {
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printf("UIF SIG is empty. Initializing to default\r\n");
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const uint8_t def[] = { 0x0, 0x20 };
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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_UIF_DEC, NULL, SPECIFY_ANY))) {
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if (!ef->data) {
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printf("UIF DEC is empty. Initializing to default\r\n");
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const uint8_t def[] = { 0x0, 0x20 };
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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_UIF_AUT, NULL, SPECIFY_ANY))) {
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if (!ef->data) {
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printf("UIF AUT is empty. Initializing to default\r\n");
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const uint8_t def[] = { 0x0, 0x20 };
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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_KDF, NULL, SPECIFY_ANY))) {
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if (!ef->data) {
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printf("KDF is empty. Initializing to default\r\n");
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const uint8_t def[] = { 0x81, 0x1, 0x0 };
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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_SEX, NULL, SPECIFY_ANY))) {
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if (!ef->data) {
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printf("Sex is empty. Initializing to default\r\n");
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const uint8_t def[] = { 0x30 };
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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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int load_dek() {
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if (!has_pw1 && !has_pw2 && !has_pw3)
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return CCID_NO_LOGIN;
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file_t *tf = search_by_fid(EF_DEK, NULL, SPECIFY_EF);
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if (!tf)
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return CCID_ERR_FILE_NOT_FOUND;
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int r = CCID_OK;
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if (has_pw1 || has_pw2) {
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memcpy(dek, file_get_data(tf), IV_SIZE+32);
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r = aes_decrypt_cfb_256(session_pw1, dek, dek+IV_SIZE, 32);
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}
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else if (has_pw3) {
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memcpy(dek, file_get_data(tf), IV_SIZE);
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memcpy(dek+IV_SIZE, file_get_data(tf)+IV_SIZE+32+32, 32);
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r = aes_decrypt_cfb_256(session_pw3, dek, dek+IV_SIZE, 32);
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}
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if (r != 0)
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return CCID_EXEC_ERROR;
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return CCID_OK;
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}
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void release_dek() {
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memset(dek, 0, sizeof(dek));
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}
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int dek_encrypt(uint8_t *data, size_t len) {
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int r;
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if ((r = load_dek()) != CCID_OK)
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return r;
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r = aes_encrypt_cfb_256(dek+IV_SIZE, dek, data, len);
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release_dek();
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return r;
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}
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int dek_decrypt(uint8_t *data, size_t len) {
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int r;
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if ((r = load_dek()) != CCID_OK)
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return r;
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r = aes_decrypt_cfb_256(dek+IV_SIZE, dek, data, len);
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release_dek();
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return r;
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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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algo_dec = EF_ALGO_PRIV2;
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algo_aut = EF_ALGO_PRIV3;
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pk_dec = EF_PK_DEC;
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pk_aut = EF_PK_AUT;
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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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algo_dec = EF_ALGO_PRIV2;
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algo_aut = EF_ALGO_PRIV3;
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pk_dec = EF_PK_DEC;
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pk_aut = EF_PK_AUT;
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return CCID_OK;
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}
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extern char __StackLimit;
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int heapLeft() {
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#ifndef ENABLE_EMULATION
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char *p = malloc(256); // try to avoid undue fragmentation
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int left = &__StackLimit - p;
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free(p);
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#else
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int left = 1024*1024;
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#endif
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return left;
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}
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app_t *openpgp_select_aid(app_t *a, const uint8_t *aid, uint8_t aid_len) {
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if (!memcmp(aid, openpgp_aid+1, MIN(aid_len,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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process_fci(file_openpgp,1);
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memcpy(res_APDU+res_APDU_size,"\x64\x06\x53\x04", 4);
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res_APDU_size += 4;
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int heap_left = heapLeft();
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res_APDU[res_APDU_size++] = ((heap_left >> 24) & 0xff);
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res_APDU[res_APDU_size++] = ((heap_left >> 16) & 0xff);
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res_APDU[res_APDU_size++] = ((heap_left >> 8) & 0xff);
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res_APDU[res_APDU_size++] = ((heap_left >> 0) & 0xff);
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res_APDU[1] += 8;
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apdu.ne = res_APDU_size;
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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 = (uint8_t *)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_get_size(ef);
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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 && res_APDU_size > 0) {
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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_get_data(ef), 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_get_size(ef);
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memcpy(res_APDU+res_APDU_size, file_get_data(ef), 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;
|
|
uint8_t *lp = res_APDU+res_APDU_size;
|
|
res_APDU_size += 2;
|
|
parse_do(fids, mode);
|
|
uint16_t lpdif = res_APDU+res_APDU_size-lp-2;
|
|
*lp++ = lpdif >> 8;
|
|
*lp++ = lpdif & 0xff;
|
|
return lpdif+4;
|
|
}
|
|
|
|
int inc_sig_count() {
|
|
file_t *pw_status;
|
|
if (!(pw_status = search_by_fid(EF_PW_PRIV, NULL, SPECIFY_EF)) || !pw_status->data)
|
|
return SW_REFERENCE_NOT_FOUND();
|
|
if (file_get_data(pw_status)[0] == 1)
|
|
has_pw1 = false;
|
|
file_t *ef = search_by_fid(EF_SIG_COUNT, NULL, SPECIFY_ANY);
|
|
if (!ef || !ef->data)
|
|
return CCID_ERR_FILE_NOT_FOUND;
|
|
uint8_t *p = file_get_data(ef);
|
|
uint32_t counter = (p[0] << 16) | (p[1] << 8) | p[2];
|
|
counter++;
|
|
uint8_t q[3] = { (counter>>16) & 0xff, (counter>>8) & 0xff, counter&0xff };
|
|
int r = flash_write_data_to_file(ef, q, sizeof(q));
|
|
if (r != CCID_OK)
|
|
return CCID_EXEC_ERROR;
|
|
low_flash_available();
|
|
return CCID_OK;
|
|
}
|
|
|
|
int reset_sig_count() {
|
|
file_t *ef = search_by_fid(EF_SIG_COUNT, NULL, SPECIFY_ANY);
|
|
if (!ef || !ef->data)
|
|
return CCID_ERR_FILE_NOT_FOUND;
|
|
uint8_t q[3] = { 0 };
|
|
int r = flash_write_data_to_file(ef, q, sizeof(q));
|
|
if (r != CCID_OK)
|
|
return CCID_EXEC_ERROR;
|
|
low_flash_available();
|
|
return CCID_OK;
|
|
}
|
|
|
|
int parse_sec_tpl(const file_t *f, int mode) {
|
|
res_APDU[res_APDU_size++] = EF_SEC_TPL & 0xff;
|
|
res_APDU[res_APDU_size++] = 5;
|
|
file_t *ef = search_by_fid(EF_SIG_COUNT, NULL, SPECIFY_ANY);
|
|
if (ef && ef->data) {
|
|
res_APDU[res_APDU_size++] = EF_SIG_COUNT & 0xff;
|
|
res_APDU[res_APDU_size++] = 3;
|
|
memcpy(res_APDU+res_APDU_size, file_get_data(ef), 3);
|
|
res_APDU_size += 3;
|
|
}
|
|
return 5+2;
|
|
}
|
|
|
|
int parse_ch_cert(const file_t *f, int mode) {
|
|
return 0;
|
|
}
|
|
|
|
int parse_fp(const file_t *f, int mode) {
|
|
res_APDU[res_APDU_size++] = EF_FP & 0xff;
|
|
res_APDU[res_APDU_size++] = 60;
|
|
return parse_trium(EF_FP_SIG, 3, 20) + 2;
|
|
}
|
|
|
|
int parse_cafp(const file_t *f, int mode) {
|
|
res_APDU[res_APDU_size++] = EF_CA_FP & 0xff;
|
|
res_APDU[res_APDU_size++] = 60;
|
|
return parse_trium(EF_FP_CA1, 3, 20) + 2;
|
|
}
|
|
|
|
int parse_ts(const file_t *f, int mode) {
|
|
res_APDU[res_APDU_size++] = EF_TS_ALL & 0xff;
|
|
res_APDU[res_APDU_size++] = 12;
|
|
return parse_trium(EF_TS_SIG, 3, 4) + 2;
|
|
}
|
|
|
|
int parse_keyinfo(const file_t *f, int mode) {
|
|
int init_len = res_APDU_size;
|
|
if (res_APDU_size > 0) {
|
|
res_APDU[res_APDU_size++] = EF_KEY_INFO & 0xff;
|
|
res_APDU[res_APDU_size++] = 6;
|
|
}
|
|
file_t *ef = search_by_fid(EF_PK_SIG, NULL, SPECIFY_ANY);
|
|
res_APDU[res_APDU_size++] = 0x00;
|
|
if (ef && ef->data)
|
|
res_APDU[res_APDU_size++] = 0x01;
|
|
else
|
|
res_APDU[res_APDU_size++] = 0x00;
|
|
|
|
ef = search_by_fid(EF_PK_DEC, NULL, SPECIFY_ANY);
|
|
res_APDU[res_APDU_size++] = 0x01;
|
|
if (ef && ef->data)
|
|
res_APDU[res_APDU_size++] = 0x01;
|
|
else
|
|
res_APDU[res_APDU_size++] = 0x00;
|
|
|
|
ef = search_by_fid(EF_PK_AUT, NULL, SPECIFY_ANY);
|
|
res_APDU[res_APDU_size++] = 0x02;
|
|
if (ef && ef->data)
|
|
res_APDU[res_APDU_size++] = 0x01;
|
|
else
|
|
res_APDU[res_APDU_size++] = 0x00;
|
|
return res_APDU_size-init_len;
|
|
}
|
|
|
|
int parse_pw_status(const file_t *f, int mode) {
|
|
file_t *ef;
|
|
int init_len = res_APDU_size;
|
|
if (res_APDU_size > 0) {
|
|
res_APDU[res_APDU_size++] = EF_PW_STATUS & 0xff;
|
|
res_APDU[res_APDU_size++] = 7;
|
|
}
|
|
ef = search_by_fid(EF_PW_PRIV, NULL, SPECIFY_ANY);
|
|
if (ef && ef->data) {
|
|
memcpy(res_APDU+res_APDU_size, file_get_data(ef), 7);
|
|
res_APDU_size += 7;
|
|
}
|
|
return res_APDU_size-init_len;
|
|
}
|
|
|
|
#define ALGO_RSA 0x01
|
|
#define ALGO_ECDH 0x12
|
|
#define ALGO_ECDSA 0x13
|
|
#define ALGO_AES 0x70
|
|
#define ALGO_AES_128 0x71
|
|
#define ALGO_AES_192 0x72
|
|
#define ALGO_AES_256 0x74
|
|
|
|
#define ALGO_RSA_1K 0
|
|
#define ALGO_RSA_2k 1
|
|
#define ALGO_RSA_3K 2
|
|
#define ALGO_RSA_4K 3
|
|
#define ALGO_X448 4
|
|
#define ALGO_P256K1 5
|
|
#define ALGO_P256R1 6
|
|
#define ALGO_P384R1 7
|
|
#define ALGO_P521R1 8
|
|
#define ALGO_BP256R1 9
|
|
#define ALGO_BP384R1 10
|
|
#define ALGO_BP512R1 11
|
|
#define ALGO_CV22519 12
|
|
|
|
static const uint8_t algorithm_attr_x448[] = {
|
|
4,
|
|
ALGO_ECDH,
|
|
/* OID of X448 */
|
|
0x2b, 0x65, 0x6f
|
|
};
|
|
|
|
static const uint8_t algorithm_attr_rsa1k[] = {
|
|
6,
|
|
ALGO_RSA,
|
|
0x04, 0x00, /* Length modulus (in bit): 1024 */
|
|
0x00, 0x20, /* Length exponent (in bit): 32 */
|
|
0x00 /* 0: Acceptable format is: P and Q */
|
|
};
|
|
|
|
static const uint8_t algorithm_attr_rsa2k[] = {
|
|
6,
|
|
ALGO_RSA,
|
|
0x08, 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_rsa3k[] = {
|
|
6,
|
|
ALGO_RSA,
|
|
0x0C, 0x00, /* Length modulus (in bit): 3072 */
|
|
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
|
|
};
|
|
|
|
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) {
|
|
int datalen = 0;
|
|
if (f->fid == EF_ALGO_INFO) {
|
|
res_APDU[res_APDU_size++] = EF_ALGO_INFO & 0xff;
|
|
res_APDU[res_APDU_size++] = 0x82;
|
|
uint8_t *lp = res_APDU + res_APDU_size;
|
|
res_APDU_size += 2;
|
|
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_AUT);
|
|
datalen += parse_algo(algorithm_attr_bp384r1, EF_ALGO_AUT);
|
|
datalen += parse_algo(algorithm_attr_bp512r1, EF_ALGO_AUT);
|
|
uint16_t lpdif = res_APDU+res_APDU_size-lp-2;
|
|
*lp++ = lpdif >> 8;
|
|
*lp++ = lpdif & 0xff;
|
|
datalen = lpdif+4;
|
|
}
|
|
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_get_size(ef);
|
|
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_get_data(ef), 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;
|
|
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[] = {
|
|
11,
|
|
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;
|
|
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.nc > 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_REFERENCE_NOT_FOUND();
|
|
if (!authenticate_action(ef, ACL_OP_READ_SEARCH)) {
|
|
return SW_SECURITY_STATUS_NOT_SATISFIED();
|
|
}
|
|
if (currentEF && (currentEF->fid & 0x1FF0) == (fid & 0x1FF0)) { //previously selected
|
|
ef = currentEF;
|
|
}
|
|
else
|
|
select_file(ef);
|
|
if (ef->data) {
|
|
uint16_t fids[] = {1,fid};
|
|
uint16_t data_len = parse_do(fids, 1);
|
|
uint8_t *p = NULL;
|
|
uint16_t tg = 0;
|
|
size_t tg_len = 0;
|
|
if (walk_tlv(res_APDU, data_len, &p, &tg, &tg_len, NULL)) {
|
|
uint8_t dec = 2;
|
|
if ((tg & 0x1f) == 0x1f)
|
|
dec++;
|
|
if ((res_APDU[dec-1] & 0xF0) == 0x80)
|
|
dec += (res_APDU[dec - 1] & 0x0F);
|
|
if (tg_len + dec == data_len) {
|
|
memmove(res_APDU, res_APDU + dec, data_len - dec);
|
|
data_len -= dec;
|
|
res_APDU_size -= dec;
|
|
}
|
|
}
|
|
//if (apdu.ne > data_len)
|
|
// apdu.ne = 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_get_data(pw_status), 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_get_size(pw_status));
|
|
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_get_data(pw_status), 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_get_size(pw_status));
|
|
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_get_size(pin)-1) //1 byte for pin len
|
|
return SW_CONDITIONS_NOT_SATISFIED();
|
|
if (memcmp(file_get_data(pin)+1, 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;
|
|
hash_multi(data, len, session_pw1);
|
|
}
|
|
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.nc != 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();
|
|
uint16_t fid = 0x1000 | p2;
|
|
if (fid == EF_RC && apdu.nc > 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_get_data(pw)[0] == 0) //not initialized
|
|
return SW_REFERENCE_NOT_FOUND();
|
|
if (apdu.nc > 0) {
|
|
return check_pin(pw, apdu.data, apdu.nc);
|
|
}
|
|
uint8_t retries = *(file_get_data(pw_status)+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_REFERENCE_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.nc = 4; //we silently ommit the reset parameters
|
|
}
|
|
if (currentEF && (currentEF->fid & 0x1FF0) == (fid & 0x1FF0)) { //previously selected
|
|
ef = currentEF;
|
|
}
|
|
if (apdu.nc > 0 && (ef->type & FILE_DATA_FLASH)) {
|
|
int r = 0;
|
|
if (fid == EF_RC) {
|
|
has_rc = false;
|
|
if ((r = load_dek()) != CCID_OK)
|
|
return SW_EXEC_ERROR();
|
|
uint8_t dhash[33];
|
|
dhash[0] = apdu.nc;
|
|
double_hash_pin(apdu.data, apdu.nc, dhash+1);
|
|
r = flash_write_data_to_file(ef, dhash, sizeof(dhash));
|
|
|
|
file_t *tf = search_by_fid(EF_DEK, NULL, SPECIFY_EF);
|
|
if (!tf)
|
|
return SW_REFERENCE_NOT_FOUND();
|
|
uint8_t def[IV_SIZE+32+32+32];
|
|
memcpy(def, file_get_data(tf), file_get_size(tf));
|
|
hash_multi(apdu.data, apdu.nc, session_rc);
|
|
memcpy(def + IV_SIZE + 32, dek + IV_SIZE, 32);
|
|
aes_encrypt_cfb_256(session_rc, def, def + IV_SIZE + 32, 32);
|
|
r = flash_write_data_to_file(tf, def, sizeof(def));
|
|
}
|
|
else
|
|
r = flash_write_data_to_file(ef, apdu.data, apdu.nc);
|
|
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_get_data(pw)[0];
|
|
uint16_t r = 0;
|
|
if ((r = load_dek()) != CCID_OK)
|
|
return SW_EXEC_ERROR();
|
|
r = check_pin(pw, apdu.data, pin_len);
|
|
if (r != 0x9000)
|
|
return r;
|
|
uint8_t dhash[33];
|
|
dhash[0] = apdu.nc-pin_len;
|
|
double_hash_pin(apdu.data+pin_len, apdu.nc-pin_len, dhash+1);
|
|
flash_write_data_to_file(pw, dhash, sizeof(dhash));
|
|
|
|
file_t *tf = search_by_fid(EF_DEK, NULL, SPECIFY_EF);
|
|
if (!tf)
|
|
return SW_REFERENCE_NOT_FOUND();
|
|
uint8_t def[IV_SIZE+32+32+32];
|
|
memcpy(def, file_get_data(tf), file_get_size(tf));
|
|
if (P2(apdu) == 0x81) {
|
|
hash_multi(apdu.data+pin_len, apdu.nc-pin_len, session_pw1);
|
|
memcpy(def + IV_SIZE, dek + IV_SIZE, 32);
|
|
aes_encrypt_cfb_256(session_pw1, def, def + IV_SIZE, 32);
|
|
}
|
|
else if (P2(apdu) == 0x83) {
|
|
hash_multi(apdu.data+pin_len, apdu.nc-pin_len, session_pw3);
|
|
memcpy(def + IV_SIZE + 32 + 32, dek + IV_SIZE, 32);
|
|
aes_encrypt_cfb_256(session_pw3, def, def+IV_SIZE+32+32, 32);
|
|
}
|
|
flash_write_data_to_file(tf, def, sizeof(def));
|
|
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;
|
|
has_pw1 = false;
|
|
if (!(pw = search_by_fid(EF_PW1, NULL, SPECIFY_EF)))
|
|
return SW_REFERENCE_NOT_FOUND();
|
|
if (P1(apdu) == 0x0) {
|
|
file_t *rc;
|
|
if (!(rc = search_by_fid(EF_RC, NULL, SPECIFY_EF)))
|
|
return SW_REFERENCE_NOT_FOUND();
|
|
uint8_t pin_len = file_get_data(rc)[0];
|
|
if (apdu.nc <= pin_len)
|
|
return SW_WRONG_LENGTH();
|
|
uint16_t r = check_pin(rc, apdu.data, pin_len);
|
|
if (r != 0x9000)
|
|
return r;
|
|
newpin_len = apdu.nc-pin_len;
|
|
has_rc = true;
|
|
hash_multi(apdu.data, pin_len, session_rc);
|
|
}
|
|
else if (P1(apdu) == 0x2) {
|
|
if (!has_pw3)
|
|
return SW_CONDITIONS_NOT_SATISFIED();
|
|
newpin_len = apdu.nc;
|
|
}
|
|
int r = 0;
|
|
if ((r = load_dek()) != CCID_OK)
|
|
return SW_EXEC_ERROR();
|
|
file_t *tf = search_by_fid(EF_DEK, NULL, SPECIFY_EF);
|
|
if (!tf)
|
|
return SW_REFERENCE_NOT_FOUND();
|
|
uint8_t def[IV_SIZE+32+32+32];
|
|
memcpy(def, file_get_data(tf), file_get_size(tf));
|
|
hash_multi(apdu.data+(apdu.nc-newpin_len), newpin_len, session_pw1);
|
|
memcpy(def + IV_SIZE, dek + IV_SIZE, 32);
|
|
aes_encrypt_cfb_256(session_pw1, def, def + IV_SIZE, 32);
|
|
r = flash_write_data_to_file(tf, def, sizeof(def));
|
|
|
|
uint8_t dhash[33];
|
|
dhash[0] = newpin_len;
|
|
double_hash_pin(apdu.data+(apdu.nc-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 = 0;
|
|
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 = dek_encrypt(kdata, key_size);
|
|
if (r != CCID_OK) {
|
|
return r;
|
|
}
|
|
//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) {
|
|
int key_size = file_get_size(fkey);
|
|
uint8_t kdata[4096/8];
|
|
memcpy(kdata, file_get_data(fkey), key_size);
|
|
if (dek_decrypt(kdata, key_size) != 0) {
|
|
return CCID_EXEC_ERROR;
|
|
}
|
|
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) {
|
|
int key_size = file_get_size(fkey);
|
|
uint8_t kdata[67]; //Worst case, 521 bit + 1byte
|
|
memcpy(kdata, file_get_data(fkey), key_size);
|
|
if (dek_decrypt(kdata, key_size) != 0) {
|
|
return CCID_EXEC_ERROR;
|
|
}
|
|
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;
|
|
}
|
|
|
|
int load_aes_key(uint8_t *aes_key, file_t *fkey) {
|
|
int key_size = file_get_size(fkey);
|
|
memcpy(aes_key, file_get_data(fkey), key_size);
|
|
if (dek_decrypt(aes_key, key_size) != 0) {
|
|
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) {
|
|
uint8_t pt[MBEDTLS_ECP_MAX_PT_LEN];
|
|
size_t plen = 0;
|
|
mbedtls_ecp_point_write_binary(&ecdsa->grp, &ecdsa->Q, MBEDTLS_ECP_PF_UNCOMPRESSED, &plen, pt, sizeof(pt));
|
|
res_APDU[res_APDU_size++] = 0x7f;
|
|
res_APDU[res_APDU_size++] = 0x49;
|
|
if (plen >= 128)
|
|
res_APDU[res_APDU_size++] = 0x81;
|
|
res_APDU[res_APDU_size++] = plen + (plen >= 128 ? 3 : 2);
|
|
res_APDU[res_APDU_size++] = 0x86;
|
|
if (plen >= 128)
|
|
res_APDU[res_APDU_size++] = 0x81;
|
|
res_APDU[res_APDU_size++] = plen;
|
|
memcpy(res_APDU + res_APDU_size, pt, plen);
|
|
res_APDU_size += plen;
|
|
}
|
|
|
|
static int cmd_keypair_gen() {
|
|
if (P2(apdu) != 0x0)
|
|
return SW_INCORRECT_P1P2();
|
|
if (apdu.nc != 2 && apdu.nc != 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.data[0] == 0xB6)
|
|
fid = EF_PK_SIG;
|
|
else if (apdu.data[0] == 0xB8)
|
|
fid = EF_PK_DEC;
|
|
else if (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_REFERENCE_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_get_data(algo_ef);
|
|
algo_len = file_get_size(algo_ef);
|
|
}
|
|
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);
|
|
if (r != 0) {
|
|
mbedtls_rsa_free(&rsa);
|
|
return SW_EXEC_ERROR();
|
|
}
|
|
r = store_keys(&rsa, ALGO_RSA, fid);
|
|
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_REFERENCE_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();
|
|
else if (fid == EF_PK_DEC) {
|
|
// OpenPGP does not allow generating AES keys. So, we generate a new one when gen for DEC is called.
|
|
// It is a 256 AES key by default.
|
|
uint8_t aes_key[32]; //maximum AES key size
|
|
uint8_t key_size = 32;
|
|
memcpy(aes_key, random_bytes_get(key_size), key_size);
|
|
r = store_keys(aes_key, ALGO_AES_256, EF_AES_KEY);
|
|
/* if storing the key fails, we silently continue */
|
|
//if (r != CCID_OK)
|
|
// return SW_EXEC_ERROR();
|
|
}
|
|
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_REFERENCE_NOT_FOUND();
|
|
res_APDU_size = file_get_size(ef);
|
|
memcpy(res_APDU, file_get_data(ef), 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;
|
|
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_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) {
|
|
size_t plen = (ctx->grp.nbits + 7) / 8;
|
|
mbedtls_mpi_write_binary(&ri, out, plen);
|
|
mbedtls_mpi_write_binary(&si, out + plen, plen);
|
|
*out_len = 2*plen;
|
|
}
|
|
mbedtls_mpi_free(&ri);
|
|
mbedtls_mpi_free(&si);
|
|
return r;
|
|
}
|
|
|
|
static int cmd_pso() {
|
|
uint16_t algo_fid = 0x0, pk_fid = 0x0;
|
|
bool is_aes = false;
|
|
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 = algo_dec;
|
|
pk_fid = pk_dec;
|
|
}
|
|
else
|
|
return SW_INCORRECT_P1P2();
|
|
file_t *algo_ef = search_by_fid(algo_fid, NULL, SPECIFY_EF);
|
|
if (!algo_ef)
|
|
return SW_REFERENCE_NOT_FOUND();
|
|
const uint8_t *algo = algorithm_attr_rsa2k+1;
|
|
if (algo_ef && algo_ef->data) {
|
|
algo = file_get_data(algo_ef);
|
|
}
|
|
if (apdu.data[0] == 0x2) { //AES PSO?
|
|
if (((apdu.nc - 1)%16 == 0 && P1(apdu) == 0x80 && P2(apdu) == 0x86) || (apdu.nc%16 == 0 && P1(apdu) == 0x86 && P2(apdu) == 0x80)) {
|
|
pk_fid = EF_AES_KEY;
|
|
is_aes = true;
|
|
}
|
|
}
|
|
file_t *ef = search_by_fid(pk_fid, NULL, SPECIFY_EF);
|
|
if (!ef)
|
|
return SW_REFERENCE_NOT_FOUND();
|
|
if (wait_button_pressed(pk_fid == EF_PK_SIG ? EF_UIF_SIG : EF_UIF_DEC) == true)
|
|
return SW_SECURE_MESSAGE_EXEC_ERROR();
|
|
int r = CCID_OK;
|
|
int key_size = file_get_size(ef);
|
|
if (is_aes) {
|
|
uint8_t aes_key[32];
|
|
r = load_aes_key(aes_key, ef);
|
|
if (r != CCID_OK) {
|
|
memset(aes_key, 0, sizeof(aes_key));
|
|
return SW_EXEC_ERROR();
|
|
}
|
|
if (P1(apdu) == 0x80 && P2(apdu) == 0x86) { //decipher
|
|
r = aes_decrypt(aes_key, NULL, key_size, HSM_AES_MODE_CBC, apdu.data+1, apdu.nc-1);
|
|
memset(aes_key, 0, sizeof(aes_key));
|
|
if (r != CCID_OK)
|
|
return SW_EXEC_ERROR();
|
|
memcpy(res_APDU, apdu.data+1, apdu.nc-1);
|
|
res_APDU_size = apdu.nc-1;
|
|
}
|
|
else if (P1(apdu) == 0x86 && P2(apdu) == 0x80) { //encipher
|
|
r = aes_encrypt(aes_key, NULL, key_size, HSM_AES_MODE_CBC, apdu.data, apdu.nc);
|
|
memset(aes_key, 0, sizeof(aes_key));
|
|
if (r != CCID_OK)
|
|
return SW_EXEC_ERROR();
|
|
res_APDU[0] = 0x2;
|
|
memcpy(res_APDU+1, apdu.data, apdu.nc);
|
|
res_APDU_size = apdu.nc+1;
|
|
}
|
|
return SW_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) {
|
|
mbedtls_rsa_free(&ctx);
|
|
return SW_EXEC_ERROR();
|
|
}
|
|
if (P1(apdu) == 0x9E && P2(apdu) == 0x9A) {
|
|
size_t olen = 0;
|
|
r = rsa_sign(&ctx, apdu.data, apdu.nc, res_APDU, &olen);
|
|
mbedtls_rsa_free(&ctx);
|
|
if (r != 0)
|
|
return SW_EXEC_ERROR();
|
|
res_APDU_size = olen;
|
|
//apdu.ne = key_size;
|
|
inc_sig_count();
|
|
}
|
|
else if (P1(apdu) == 0x80 && P2(apdu) == 0x86) {
|
|
if (apdu.nc < key_size) //needs padding
|
|
memset(apdu.data+apdu.nc, 0, key_size-apdu.nc);
|
|
size_t olen = 0;
|
|
r = mbedtls_rsa_pkcs1_decrypt(&ctx, random_gen, NULL, &olen, 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) {
|
|
mbedtls_ecdsa_free(&ctx);
|
|
return SW_EXEC_ERROR();
|
|
}
|
|
size_t olen = 0;
|
|
r = ecdsa_sign(&ctx, apdu.data, apdu.nc, res_APDU, &olen);
|
|
mbedtls_ecdsa_free(&ctx);
|
|
if (r != 0)
|
|
return SW_EXEC_ERROR();
|
|
res_APDU_size = olen;
|
|
inc_sig_count();
|
|
}
|
|
else if (P1(apdu) == 0x80 && P2(apdu) == 0x86) {
|
|
mbedtls_ecdh_context ctx;
|
|
uint8_t kdata[67];
|
|
uint8_t *data = apdu.data, *end = data+apdu.nc;
|
|
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_get_data(ef), key_size);
|
|
if (dek_decrypt(kdata, key_size) != 0) {
|
|
return SW_EXEC_ERROR();
|
|
}
|
|
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_get_data(retries)+6) > 0)
|
|
return SW_SECURITY_STATUS_NOT_SATISFIED();
|
|
if (apdu.nc != 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.ne);
|
|
if (!rb)
|
|
return SW_WRONG_LENGTH();
|
|
memcpy(res_APDU, rb, apdu.ne);
|
|
res_APDU_size = apdu.ne;
|
|
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(algo_aut, NULL, SPECIFY_EF);
|
|
if (!algo_ef)
|
|
return SW_REFERENCE_NOT_FOUND();
|
|
const uint8_t *algo = algorithm_attr_rsa2k+1;
|
|
if (algo_ef && algo_ef->data) {
|
|
algo = file_get_data(algo_ef);
|
|
}
|
|
file_t *ef = search_by_fid(pk_aut, NULL, SPECIFY_EF);
|
|
if (!ef)
|
|
return SW_REFERENCE_NOT_FOUND();
|
|
if (wait_button_pressed(EF_UIF_AUT) == true)
|
|
return SW_SECURE_MESSAGE_EXEC_ERROR();
|
|
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) {
|
|
mbedtls_rsa_free(&ctx);
|
|
return SW_EXEC_ERROR();
|
|
}
|
|
size_t olen = 0;
|
|
r = rsa_sign(&ctx, apdu.data, apdu.nc, 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) {
|
|
mbedtls_ecdsa_free(&ctx);
|
|
return SW_EXEC_ERROR();
|
|
}
|
|
size_t olen = 0;
|
|
r = ecdsa_sign(&ctx, apdu.data, apdu.nc, res_APDU, &olen);
|
|
mbedtls_ecdsa_free(&ctx);
|
|
if (r != 0)
|
|
return SW_EXEC_ERROR();
|
|
res_APDU_size = olen;
|
|
}
|
|
return SW_OK();
|
|
}
|
|
|
|
static int cmd_mse() {
|
|
if (P1(apdu) != 0x41 || (P2(apdu) != 0xA4 && P2(apdu) != 0xB8))
|
|
return SW_WRONG_P1P2();
|
|
if (apdu.data[0] != 0x83 || apdu.data[1] != 0x1 || (apdu.data[2] != 0x2 && apdu.data[2] != 0x3))
|
|
return SW_WRONG_DATA();
|
|
if (P2(apdu) == 0xA4) {
|
|
if (apdu.data[2] == 0x2) {
|
|
algo_dec = EF_ALGO_PRIV2;
|
|
pk_dec = EF_PK_DEC;
|
|
}
|
|
else if (apdu.data[2] == 0x3) {
|
|
algo_dec = EF_ALGO_PRIV3;
|
|
pk_dec = EF_PK_AUT;
|
|
}
|
|
}
|
|
else if (P2(apdu) == 0xB8) {
|
|
if (apdu.data[2] == 0x2) {
|
|
algo_aut = EF_ALGO_PRIV2;
|
|
pk_aut = EF_PK_DEC;
|
|
}
|
|
else if (apdu.data[2] == 0x3) {
|
|
algo_aut = EF_ALGO_PRIV3;
|
|
pk_aut = EF_PK_AUT;
|
|
}
|
|
}
|
|
return SW_OK();
|
|
}
|
|
|
|
size_t tag_len(uint8_t **data) {
|
|
size_t len = *(*data)++;
|
|
if (len == 0x82) {
|
|
len = *(*data)++ << 8;
|
|
len |= *(*data)++;
|
|
}
|
|
else if (len == 0x81) {
|
|
len = *(*data)++;
|
|
}
|
|
return len;
|
|
}
|
|
|
|
static int cmd_import_data() {
|
|
file_t *ef = NULL;
|
|
uint16_t fid = 0x0;
|
|
if (P1(apdu) != 0x3F || P2(apdu) != 0xFF)
|
|
return SW_WRONG_P1P2();
|
|
if (apdu.nc < 5)
|
|
return SW_WRONG_LENGTH();
|
|
uint8_t *start = apdu.data;
|
|
if (*start++ != 0x4D)
|
|
return SW_WRONG_DATA();
|
|
size_t tgl = tag_len(&start);
|
|
if (*start != 0xB6 && *start != 0xB8 && *start != 0xA4)
|
|
return SW_WRONG_DATA();
|
|
if (*start == 0xB6)
|
|
fid = EF_PK_SIG;
|
|
else if (*start == 0xB8)
|
|
fid = EF_PK_DEC;
|
|
else if (*start == 0xA4)
|
|
fid = EF_PK_AUT;
|
|
else
|
|
return SW_WRONG_DATA();
|
|
start++;
|
|
if (!(ef = search_by_fid(fid, NULL, SPECIFY_EF)))
|
|
return SW_REFERENCE_NOT_FOUND();
|
|
if (!authenticate_action(ef, ACL_OP_UPDATE_ERASE)) {
|
|
return SW_SECURITY_STATUS_NOT_SATISFIED();
|
|
}
|
|
start += (*start + 1);
|
|
if (*start++ != 0x7F || *start++ != 0x48)
|
|
return SW_WRONG_DATA();
|
|
tgl = tag_len(&start);
|
|
uint8_t *end = start + tgl, len[9] = {0}, *p[9] = {0};
|
|
while (start < end) {
|
|
uint8_t tag = *start++;
|
|
if ((tag >= 0x91 && tag <= 0x97) || tag == 0x99) {
|
|
len[tag-0x91] = tag_len(&start);
|
|
}
|
|
else
|
|
return SW_WRONG_DATA();
|
|
}
|
|
if (*start++ != 0x5F || *start++ != 0x48)
|
|
return SW_WRONG_DATA();
|
|
tgl = tag_len(&start);
|
|
end = start+tgl;
|
|
for (int t = 0; start < end && t < 9; t++) {
|
|
if (len[t] > 0) {
|
|
p[t] = start;
|
|
start += len[t];
|
|
}
|
|
}
|
|
|
|
file_t *algo_ef = search_by_fid(fid-0x0010, NULL, SPECIFY_EF);
|
|
if (!algo_ef)
|
|
return SW_REFERENCE_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_get_data(algo_ef);
|
|
algo_len = file_get_size(algo_ef);
|
|
}
|
|
int r = 0;
|
|
if (algo[0] == ALGO_RSA) {
|
|
mbedtls_rsa_context rsa;
|
|
if (p[0] == NULL || len[0] == 0 || p[1] == NULL || len[1] == 0 || p[2] == NULL || len[2] == 0)
|
|
return SW_WRONG_DATA();
|
|
mbedtls_rsa_init(&rsa);
|
|
r = mbedtls_mpi_read_binary(&rsa.E, p[0], len[0]);
|
|
if (r != 0) {
|
|
mbedtls_rsa_free(&rsa);
|
|
return SW_EXEC_ERROR();
|
|
}
|
|
r = mbedtls_mpi_read_binary(&rsa.P, p[1], len[1]);
|
|
if (r != 0) {
|
|
mbedtls_rsa_free(&rsa);
|
|
return SW_EXEC_ERROR();
|
|
}
|
|
r = mbedtls_mpi_read_binary(&rsa.Q, p[2], len[2]);
|
|
if (r != 0) {
|
|
mbedtls_rsa_free(&rsa);
|
|
return SW_EXEC_ERROR();
|
|
}
|
|
r = mbedtls_rsa_import(&rsa, NULL, &rsa.P, &rsa.Q, NULL, &rsa.E);
|
|
if (r != 0) {
|
|
mbedtls_rsa_free(&rsa);
|
|
return SW_EXEC_ERROR();
|
|
}
|
|
r = mbedtls_rsa_complete(&rsa);
|
|
if (r != 0) {
|
|
mbedtls_rsa_free(&rsa);
|
|
return SW_EXEC_ERROR();
|
|
}
|
|
r = mbedtls_rsa_check_privkey(&rsa);
|
|
if (r != 0) {
|
|
mbedtls_rsa_free(&rsa);
|
|
return SW_EXEC_ERROR();
|
|
}
|
|
r = store_keys(&rsa, ALGO_RSA, fid);
|
|
make_rsa_response(&rsa);
|
|
mbedtls_rsa_free(&rsa);
|
|
if (r != CCID_OK)
|
|
return SW_EXEC_ERROR();
|
|
}
|
|
else if (algo[0] == ALGO_ECDSA || algo[0] == ALGO_ECDH) {
|
|
mbedtls_ecdsa_context ecdsa;
|
|
if (p[1] == NULL || len[1] == 0)
|
|
return SW_WRONG_DATA();
|
|
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_init(&ecdsa);
|
|
r = mbedtls_ecp_read_key(gid, &ecdsa, p[1], len[1]);
|
|
if (r != 0) {
|
|
mbedtls_ecdsa_free(&ecdsa);
|
|
return SW_EXEC_ERROR();
|
|
}
|
|
r = mbedtls_ecp_mul(&ecdsa.grp, &ecdsa.Q, &ecdsa.d, &ecdsa.grp.G, random_gen, NULL);
|
|
if (r != 0) {
|
|
mbedtls_ecdsa_free(&ecdsa);
|
|
return SW_EXEC_ERROR();
|
|
}
|
|
r = store_keys(&ecdsa, ALGO_ECDSA, fid);
|
|
make_ecdsa_response(&ecdsa);
|
|
mbedtls_ecdsa_free(&ecdsa);
|
|
if (r != CCID_OK)
|
|
return SW_EXEC_ERROR();
|
|
}
|
|
if (fid == EF_PK_SIG)
|
|
reset_sig_count();
|
|
file_t *pbef = search_by_fid(fid+3, NULL, SPECIFY_EF);
|
|
if (!pbef)
|
|
return SW_REFERENCE_NOT_FOUND();
|
|
r = flash_write_data_to_file(pbef, res_APDU, res_APDU_size);
|
|
if (r != CCID_OK)
|
|
return SW_EXEC_ERROR();
|
|
res_APDU_size = 0; //make_*_response sets a response. we need to overwrite
|
|
return SW_OK();
|
|
}
|
|
|
|
static int cmd_version() {
|
|
res_APDU[res_APDU_size++] = PIPGP_VERSION_MAJOR;
|
|
res_APDU[res_APDU_size++] = PIPGP_VERSION_MINOR;
|
|
res_APDU[res_APDU_size++] = 0x0;
|
|
return SW_OK();
|
|
}
|
|
|
|
static int cmd_select_data() {
|
|
file_t *ef = NULL;
|
|
uint16_t fid = 0x0;
|
|
if (P2(apdu) != 0x4)
|
|
return SW_WRONG_P1P2();
|
|
if (apdu.data[0] != 0x60)
|
|
return SW_WRONG_DATA();
|
|
if (apdu.nc != apdu.data[1]+2 || apdu.nc < 5)
|
|
return SW_WRONG_LENGTH();
|
|
if (apdu.data[2] != 0x5C)
|
|
return SW_WRONG_DATA();
|
|
if (apdu.data[3] == 2)
|
|
fid = (apdu.data[4] << 8) | apdu.data[5];
|
|
else
|
|
fid = apdu.data[4];
|
|
if (!(ef = search_by_fid(fid, NULL, SPECIFY_EF)))
|
|
return SW_REFERENCE_NOT_FOUND();
|
|
if (!authenticate_action(ef, ACL_OP_UPDATE_ERASE)) {
|
|
return SW_SECURITY_STATUS_NOT_SATISFIED();
|
|
}
|
|
fid &= ~0x6000; //Now get private DO
|
|
fid += P1(apdu);
|
|
if (!(ef = search_by_fid(fid, NULL, SPECIFY_EF)))
|
|
return SW_REFERENCE_NOT_FOUND();
|
|
select_file(ef);
|
|
return SW_OK();
|
|
}
|
|
|
|
static int cmd_get_next_data() {
|
|
file_t *ef = NULL;
|
|
if (apdu.nc > 0)
|
|
return SW_WRONG_LENGTH();
|
|
if (!currentEF)
|
|
return SW_RECORD_NOT_FOUND();
|
|
uint16_t fid = (P1(apdu) << 8) | P2(apdu);
|
|
if (!(ef = search_by_fid(fid, NULL, SPECIFY_EF)))
|
|
return SW_REFERENCE_NOT_FOUND();
|
|
if (!authenticate_action(ef, ACL_OP_UPDATE_ERASE)) {
|
|
return SW_SECURITY_STATUS_NOT_SATISFIED();
|
|
}
|
|
if ((currentEF->fid & 0x1FF0) != (fid & 0x1FF0))
|
|
return SW_WRONG_P1P2();
|
|
fid = currentEF->fid + 1; //curentEF contains private DO. so, we select the next one
|
|
if (!(ef = search_by_fid(fid, NULL, SPECIFY_EF)))
|
|
return SW_REFERENCE_NOT_FOUND();
|
|
select_file(ef);
|
|
return cmd_get_data();
|
|
}
|
|
|
|
#define INS_VERIFY 0x20
|
|
#define INS_MSE 0x22
|
|
#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_SELECT_DATA 0xA5
|
|
#define INS_GET_DATA 0xCA
|
|
#define INS_GET_NEXT_DATA 0xCC
|
|
#define INS_PUT_DATA 0xDA
|
|
#define INS_IMPORT_DATA 0xDB
|
|
#define INS_TERMINATE_DF 0xE6
|
|
#define INS_VERSION 0xF1
|
|
|
|
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 },
|
|
{ INS_MSE, cmd_mse },
|
|
{ INS_IMPORT_DATA, cmd_import_data },
|
|
{ INS_VERSION, cmd_version },
|
|
{ INS_SELECT_DATA, cmd_select_data },
|
|
{ INS_GET_NEXT_DATA, cmd_get_next_data },
|
|
{ 0x00, 0x0}
|
|
};
|
|
|
|
int openpgp_process_apdu() {
|
|
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();
|
|
} |