254 lines
7.2 KiB
C
254 lines
7.2 KiB
C
/*
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* This file is part of the Pico Keys SDK distribution (https://github.com/polhenarejos/pico-keys-sdk).
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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 "apdu.h"
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#include "pico_keys.h"
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#include "usb.h"
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#include <stdio.h>
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#ifdef ESP_PLATFORM
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#include "esp_compat.h"
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#endif
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#ifdef ENABLE_EMULATION
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#include "emulation.h"
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#endif
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uint8_t *rdata_gr = NULL;
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uint16_t rdata_bk = 0x0;
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extern uint32_t timeout;
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bool is_chaining = false;
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uint8_t chain_buf[4096];
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uint8_t *chain_ptr = NULL;
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int process_apdu() {
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led_set_blink(BLINK_PROCESSING);
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if (CLA(apdu) & 0x10) {
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if (!is_chaining) {
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chain_ptr = chain_buf;
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}
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if (chain_ptr - chain_buf + apdu.nc >= sizeof(chain_buf)) {
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return SW_CLA_NOT_SUPPORTED();
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}
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memcpy(chain_ptr, apdu.data, apdu.nc);
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chain_ptr += apdu.nc;
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is_chaining = true;
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return SW_OK();
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}
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else {
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if (is_chaining) {
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memmove(apdu.data + (chain_ptr - chain_buf), apdu.data, apdu.nc);
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memcpy(apdu.data, chain_buf, chain_ptr - chain_buf);
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apdu.nc += (uint16_t)(chain_ptr - chain_buf);
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is_chaining = false;
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}
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}
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if (INS(apdu) == 0xA4 && P1(apdu) == 0x04 && (P2(apdu) == 0x00 || P2(apdu) == 0x4)) { //select by AID
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if (select_app(apdu.data, apdu.nc) == CCID_OK) {
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return SW_OK();
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}
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return SW_FILE_NOT_FOUND();
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}
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if (current_app && current_app->process_apdu) {
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return current_app->process_apdu();
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}
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return SW_FILE_NOT_FOUND();
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}
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uint16_t apdu_process(uint8_t itf, const uint8_t *buffer, uint16_t buffer_size) {
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apdu.header = (uint8_t *) buffer;
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apdu.nc = apdu.ne = 0;
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if (buffer_size == 4) {
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apdu.nc = apdu.ne = 0;
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if (apdu.ne == 0) {
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apdu.ne = 256;
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}
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}
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else if (buffer_size == 5) {
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apdu.nc = 0;
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apdu.ne = apdu.header[4];
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if (apdu.ne == 0) {
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apdu.ne = 256;
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}
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}
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else if (apdu.header[4] == 0x0 && buffer_size >= 7) {
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if (buffer_size == 7) {
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apdu.ne = (apdu.header[5] << 8) | apdu.header[6];
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if (apdu.ne == 0) {
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apdu.ne = 65536;
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}
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}
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else {
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apdu.ne = 0;
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apdu.nc = (apdu.header[5] << 8) | apdu.header[6];
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apdu.data = apdu.header + 7;
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if (apdu.nc + 7 + 2 == buffer_size) {
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apdu.ne = (apdu.header[buffer_size - 2] << 8) | apdu.header[buffer_size - 1];
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if (apdu.ne == 0) {
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apdu.ne = 65536;
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}
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}
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}
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}
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else {
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apdu.nc = apdu.header[4];
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apdu.data = apdu.header + 5;
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apdu.ne = 0;
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if (apdu.nc + 5 + 1 == buffer_size) {
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apdu.ne = apdu.header[buffer_size - 1];
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if (apdu.ne == 0) {
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apdu.ne = 256;
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}
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}
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}
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//printf("apdu.nc %ld, apdu.ne %ld\n",apdu.nc,apdu.ne);
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if (apdu.header[1] == 0xc0) {
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//printf("apdu.ne %u, apdu.rlen %d, bk %x\n",apdu.ne,apdu.rlen,rdata_bk);
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timeout_stop();
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*(uint16_t *) rdata_gr = rdata_bk;
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if (apdu.rlen <= apdu.ne) {
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#ifndef ENABLE_EMULATION
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#ifdef USB_ITF_HID
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if (itf == ITF_HID_CTAP) {
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driver_exec_finished_cont_hid(itf, apdu.rlen + 2, rdata_gr - apdu.rdata);
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}
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#endif
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#ifdef USB_ITF_CCID
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if (itf == ITF_SC_CCID || itf == ITF_SC_WCID) {
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driver_exec_finished_cont_ccid(itf, apdu.rlen + 2, rdata_gr - apdu.rdata);
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}
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#endif
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#else
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driver_exec_finished_cont_emul(itf, apdu.rlen + 2, (uint16_t)(rdata_gr - apdu.rdata));
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#endif
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//Prepare next RAPDU
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apdu.sw = 0;
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apdu.rlen = 0;
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rdata_gr = apdu.rdata;
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}
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else {
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rdata_gr += apdu.ne;
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rdata_bk = *(uint16_t *) rdata_gr;
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rdata_gr[0] = 0x61;
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if (apdu.rlen - apdu.ne >= 256) {
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rdata_gr[1] = 0;
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}
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else {
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rdata_gr[1] = (uint8_t)(apdu.rlen - apdu.ne);
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}
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#ifndef ENABLE_EMULATION
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#ifdef USB_ITF_HID
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if (itf == ITF_HID_CTAP) {
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driver_exec_finished_cont_hid(itf, apdu.ne + 2, rdata_gr - apdu.ne - apdu.rdata);
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}
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#endif
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#ifdef USB_ITF_CCID
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if (itf == ITF_SC_CCID || itf == ITF_SC_WCID) {
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driver_exec_finished_cont_ccid(itf, apdu.ne + 2, rdata_gr - apdu.ne - apdu.rdata);
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}
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#endif
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#else
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driver_exec_finished_cont_emul(itf, (uint16_t)(apdu.ne + 2), (uint16_t)(rdata_gr - apdu.ne - apdu.rdata));
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#endif
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apdu.rlen -= (uint16_t)apdu.ne;
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}
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}
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else {
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apdu.sw = 0;
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apdu.rlen = 0;
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rdata_gr = apdu.rdata;
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return 1;
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}
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return 0;
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}
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uint16_t set_res_sw(uint8_t sw1, uint8_t sw2) {
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apdu.sw = (sw1 << 8) | sw2;
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if (sw1 != 0x90) {
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res_APDU_size = 0;
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}
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return make_uint16_t(sw1, sw2);
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}
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void apdu_thread(void) {
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card_init_core1();
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while (1) {
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uint32_t m = 0;
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queue_remove_blocking(&usb_to_card_q, &m);
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uint32_t flag = m + 1;
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queue_add_blocking(&card_to_usb_q, &flag);
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if (m == EV_VERIFY_CMD_AVAILABLE || m == EV_MODIFY_CMD_AVAILABLE) {
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set_res_sw(0x6f, 0x00);
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goto done;
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}
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else if (m == EV_EXIT) {
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break;
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}
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process_apdu();
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done: ;
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apdu_finish();
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finished_data_size = apdu_next();
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flag = EV_EXEC_FINISHED;
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queue_add_blocking(&card_to_usb_q, &flag);
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#ifdef ESP_PLATFORM
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vTaskDelay(pdMS_TO_TICKS(10));
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#endif
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}
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//printf("EXIT !!!!!!\n");
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if (current_app && current_app->unload) {
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current_app->unload();
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current_app = NULL;
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}
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#ifdef ESP_PLATFORM
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vTaskDelete(NULL);
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#endif
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}
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void apdu_finish() {
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apdu.rdata[apdu.rlen] = apdu.sw >> 8;
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apdu.rdata[apdu.rlen + 1] = apdu.sw & 0xff;
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// timeout_stop();
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#ifndef ENABLE_EMULATION
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if ((apdu.rlen + 2 + 10) % 64 == 0) { // FIX for strange behaviour with PSCS and multiple of 64
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apdu.ne = apdu.rlen - 2;
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}
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#endif
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}
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uint16_t apdu_next() {
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if (apdu.sw != 0) {
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if (apdu.rlen <= apdu.ne) {
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return apdu.rlen + 2;
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}
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else {
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rdata_gr = apdu.rdata + apdu.ne;
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rdata_bk = *(uint16_t *) rdata_gr;
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rdata_gr[0] = 0x61;
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if (apdu.rlen - apdu.ne >= 256) {
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rdata_gr[1] = 0;
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}
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else {
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rdata_gr[1] = (uint8_t)(apdu.rlen - apdu.ne);
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}
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apdu.rlen -= (uint16_t)apdu.ne;
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}
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return (uint16_t)(apdu.ne + 2);
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}
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return 0;
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}
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