153 lines
4.5 KiB
C
153 lines
4.5 KiB
C
/*
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* This file is part of the Pico HSM SDK distribution (https://github.com/polhenarejos/pico-hsm-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 "hsm.h"
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#include "usb.h"
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#include <stdio.h>
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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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int process_apdu() {
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led_set_blink(BLINK_PROCESSING);
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if (!current_app)
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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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for (int a = 0; a < num_apps; a++) {
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if ((current_app = apps[a].select_aid(&apps[a]))) {
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return set_res_sw(0x90,0x00);
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}
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}
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}
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return set_res_sw(0x6a, 0x82);
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}
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if (current_app->process_apdu)
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return current_app->process_apdu();
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return set_res_sw(0x6D, 0x00);
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}
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size_t apdu_process(const uint8_t *buffer, size_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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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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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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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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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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//printf("apdu.nc %ld, apdu.ne %ld\r\n",apdu.nc,apdu.ne);
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if (apdu.header[1] == 0xc0) {
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//printf("apdu.ne %ld, apdu.rlen %d, bk %x\r\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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driver_exec_finished_cont(apdu.rlen+2, rdata_gr-usb_get_tx());
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}
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else {
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rdata_gr += apdu.ne;
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rdata_bk = *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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else
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rdata_gr[1] = apdu.rlen - apdu.ne;
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driver_exec_finished_cont(apdu.ne+2, rdata_gr-apdu.ne-usb_get_tx());
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apdu.rlen -= apdu.ne;
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}
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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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usb_prepare_response();
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return 0;
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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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apdu.rdata = usb_prepare_response();
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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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return make_uint16_t(sw1, sw2);
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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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if ((apdu.rlen + 2 + 10) % 64 == 0)
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{ // 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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}
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size_t apdu_next() {
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if (apdu.rlen <= apdu.ne)
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return apdu.rlen + 2;
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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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else
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rdata_gr[1] = apdu.rlen - apdu.ne;
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apdu.rlen -= apdu.ne;
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}
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return apdu.ne + 2;
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}
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