libcacard: add vscclient
client to talk to ccid-card-passthru and use smartcard on client to perform actual operations. v23->v24 changes: (Jes Sorensen review 2) * use qemu_socket instead of socket * use fprintf(stderr,..) for errors * remove unneccessary includes since using qemu_common.h
This commit is contained in:
Robert Relyea
Anthony Liguori
parent
111a38b018
commit
2ac85b93b0
@ -15,6 +15,11 @@ QEMU_OBJS=$(addprefix ../, $(QEMU_THREAD) $(oslib-obj-y) $(trace-obj-y) qemu-mal
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QEMU_CFLAGS+=-I../
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clean:
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rm -f *.o */*.o *.d */*.d *.a */*.a *~ */*~
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vscclient: $(libcacard-y) $(QEMU_OBJS) vscclient.o
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$(call quiet-command,$(CC) $(libcacard_libs) -lrt -o $@ $^," LINK $(TARGET_DIR)$@")
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all: vscclient
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clean:
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rm -f *.o */*.o *.d */*.d *.a */*.a *~ */*~ vscclient
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652
libcacard/vscclient.c
Normal file
652
libcacard/vscclient.c
Normal file
@ -0,0 +1,652 @@
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/*
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* Tester for VSCARD protocol, client side.
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*
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* Can be used with ccid-card-passthru.
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*
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* Copyright (c) 2011 Red Hat.
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* Written by Alon Levy.
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*
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* This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
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* See the COPYING.LIB file in the top-level directory.
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*/
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#include <netdb.h>
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#include "qemu-common.h"
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#include "qemu-thread.h"
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#include "qemu_socket.h"
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#include "vscard_common.h"
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#include "vreader.h"
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#include "vcard_emul.h"
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#include "vevent.h"
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int verbose;
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int sock;
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static void
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print_byte_array(
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uint8_t *arrBytes,
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unsigned int nSize
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) {
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int i;
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for (i = 0; i < nSize; i++) {
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printf("%02X ", arrBytes[i]);
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}
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printf("\n");
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}
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static void
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print_usage(void) {
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printf("vscclient [-c <certname> .. -e <emul_args> -d <level>%s] "
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"<host> <port>\n",
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#ifdef USE_PASSTHRU
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" -p");
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printf(" -p use passthrough mode\n");
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#else
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"");
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#endif
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vcard_emul_usage();
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}
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static QemuMutex write_lock;
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static int
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send_msg(
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VSCMsgType type,
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uint32_t reader_id,
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const void *msg,
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unsigned int length
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) {
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int rv;
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VSCMsgHeader mhHeader;
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qemu_mutex_lock(&write_lock);
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if (verbose > 10) {
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printf("sending type=%d id=%d, len =%d (0x%x)\n",
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type, reader_id, length, length);
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}
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mhHeader.type = htonl(type);
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mhHeader.reader_id = 0;
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mhHeader.length = htonl(length);
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rv = write(sock, &mhHeader, sizeof(mhHeader));
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if (rv < 0) {
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/* Error */
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fprintf(stderr, "write header error\n");
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close(sock);
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qemu_mutex_unlock(&write_lock);
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return 16;
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}
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rv = write(sock, msg, length);
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if (rv < 0) {
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/* Error */
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fprintf(stderr, "write error\n");
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close(sock);
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qemu_mutex_unlock(&write_lock);
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return 16;
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}
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qemu_mutex_unlock(&write_lock);
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return 0;
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}
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static VReader *pending_reader;
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static QemuMutex pending_reader_lock;
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static QemuCond pending_reader_condition;
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#define MAX_ATR_LEN 40
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static void *
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event_thread(void *arg)
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{
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unsigned char atr[MAX_ATR_LEN];
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int atr_len = MAX_ATR_LEN;
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VEvent *event = NULL;
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unsigned int reader_id;
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while (1) {
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const char *reader_name;
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event = vevent_wait_next_vevent();
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if (event == NULL) {
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break;
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}
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reader_id = vreader_get_id(event->reader);
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if (reader_id == VSCARD_UNDEFINED_READER_ID &&
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event->type != VEVENT_READER_INSERT) {
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/* ignore events from readers qemu has rejected */
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/* if qemu is still deciding on this reader, wait to see if need to
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* forward this event */
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qemu_mutex_lock(&pending_reader_lock);
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if (!pending_reader || (pending_reader != event->reader)) {
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/* wasn't for a pending reader, this reader has already been
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* rejected by qemu */
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qemu_mutex_unlock(&pending_reader_lock);
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vevent_delete(event);
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continue;
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}
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/* this reader hasn't been told it's status from qemu yet, wait for
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* that status */
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while (pending_reader != NULL) {
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qemu_cond_wait(&pending_reader_condition, &pending_reader_lock);
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}
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qemu_mutex_unlock(&pending_reader_lock);
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/* now recheck the id */
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reader_id = vreader_get_id(event->reader);
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if (reader_id == VSCARD_UNDEFINED_READER_ID) {
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/* this reader was rejected */
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vevent_delete(event);
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continue;
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}
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/* reader was accepted, now forward the event */
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}
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switch (event->type) {
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case VEVENT_READER_INSERT:
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/* tell qemu to insert a new CCID reader */
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/* wait until qemu has responded to our first reader insert
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* before we send a second. That way we won't confuse the responses
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* */
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qemu_mutex_lock(&pending_reader_lock);
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while (pending_reader != NULL) {
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qemu_cond_wait(&pending_reader_condition, &pending_reader_lock);
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}
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pending_reader = vreader_reference(event->reader);
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qemu_mutex_unlock(&pending_reader_lock);
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reader_name = vreader_get_name(event->reader);
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if (verbose > 10) {
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printf(" READER INSERT: %s\n", reader_name);
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}
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send_msg(VSC_ReaderAdd,
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reader_id, /* currerntly VSCARD_UNDEFINED_READER_ID */
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NULL, 0 /* TODO reader_name, strlen(reader_name) */);
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break;
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case VEVENT_READER_REMOVE:
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/* future, tell qemu that an old CCID reader has been removed */
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if (verbose > 10) {
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printf(" READER REMOVE: %d\n", reader_id);
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}
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send_msg(VSC_ReaderRemove, reader_id, NULL, 0);
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break;
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case VEVENT_CARD_INSERT:
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/* get the ATR (intended as a response to a power on from the
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* reader */
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atr_len = MAX_ATR_LEN;
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vreader_power_on(event->reader, atr, &atr_len);
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/* ATR call functions as a Card Insert event */
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if (verbose > 10) {
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printf(" CARD INSERT %d: ", reader_id);
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print_byte_array(atr, atr_len);
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}
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send_msg(VSC_ATR, reader_id, atr, atr_len);
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break;
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case VEVENT_CARD_REMOVE:
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/* Card removed */
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if (verbose > 10) {
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printf(" CARD REMOVE %d:\n", reader_id);
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}
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send_msg(VSC_CardRemove, reader_id, NULL, 0);
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break;
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default:
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break;
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}
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vevent_delete(event);
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}
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return NULL;
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}
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static unsigned int
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get_id_from_string(char *string, unsigned int default_id)
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{
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unsigned int id = atoi(string);
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/* don't accidentally swith to zero because no numbers have been supplied */
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if ((id == 0) && *string != '0') {
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return default_id;
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}
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return id;
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}
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static void
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do_command(void)
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{
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char inbuf[255];
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char *string;
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VCardEmulError error;
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static unsigned int default_reader_id;
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unsigned int reader_id;
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VReader *reader = NULL;
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reader_id = default_reader_id;
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string = fgets(inbuf, sizeof(inbuf), stdin);
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if (string != NULL) {
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if (strncmp(string, "exit", 4) == 0) {
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/* remove all the readers */
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VReaderList *list = vreader_get_reader_list();
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VReaderListEntry *reader_entry;
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printf("Active Readers:\n");
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for (reader_entry = vreader_list_get_first(list); reader_entry;
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reader_entry = vreader_list_get_next(reader_entry)) {
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VReader *reader = vreader_list_get_reader(reader_entry);
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vreader_id_t reader_id;
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reader_id = vreader_get_id(reader);
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if (reader_id == -1) {
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continue;
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}
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/* be nice and signal card removal first (qemu probably should
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* do this itself) */
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if (vreader_card_is_present(reader) == VREADER_OK) {
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send_msg(VSC_CardRemove, reader_id, NULL, 0);
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}
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send_msg(VSC_ReaderRemove, reader_id, NULL, 0);
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}
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exit(0);
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} else if (strncmp(string, "insert", 6) == 0) {
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if (string[6] == ' ') {
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reader_id = get_id_from_string(&string[7], reader_id);
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}
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reader = vreader_get_reader_by_id(reader_id);
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if (reader != NULL) {
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error = vcard_emul_force_card_insert(reader);
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printf("insert %s, returned %d\n",
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reader ? vreader_get_name(reader)
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: "invalid reader", error);
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} else {
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printf("no reader by id %d found\n", reader_id);
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}
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} else if (strncmp(string, "remove", 6) == 0) {
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if (string[6] == ' ') {
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reader_id = get_id_from_string(&string[7], reader_id);
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}
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reader = vreader_get_reader_by_id(reader_id);
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if (reader != NULL) {
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error = vcard_emul_force_card_remove(reader);
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printf("remove %s, returned %d\n",
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reader ? vreader_get_name(reader)
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: "invalid reader", error);
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} else {
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printf("no reader by id %d found\n", reader_id);
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}
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} else if (strncmp(string, "select", 6) == 0) {
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if (string[6] == ' ') {
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reader_id = get_id_from_string(&string[7],
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VSCARD_UNDEFINED_READER_ID);
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}
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if (reader_id != VSCARD_UNDEFINED_READER_ID) {
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reader = vreader_get_reader_by_id(reader_id);
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}
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if (reader) {
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printf("Selecting reader %d, %s\n", reader_id,
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vreader_get_name(reader));
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default_reader_id = reader_id;
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} else {
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printf("Reader with id %d not found\n", reader_id);
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}
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} else if (strncmp(string, "debug", 5) == 0) {
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if (string[5] == ' ') {
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verbose = get_id_from_string(&string[6], 0);
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}
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printf("debug level = %d\n", verbose);
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} else if (strncmp(string, "list", 4) == 0) {
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VReaderList *list = vreader_get_reader_list();
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VReaderListEntry *reader_entry;
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printf("Active Readers:\n");
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for (reader_entry = vreader_list_get_first(list); reader_entry;
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reader_entry = vreader_list_get_next(reader_entry)) {
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VReader *reader = vreader_list_get_reader(reader_entry);
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vreader_id_t reader_id;
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reader_id = vreader_get_id(reader);
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if (reader_id == -1) {
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continue;
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}
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printf("%3d %s %s\n", reader_id,
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vreader_card_is_present(reader) == VREADER_OK ?
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"CARD_PRESENT" : " ",
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vreader_get_name(reader));
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}
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printf("Inactive Readers:\n");
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for (reader_entry = vreader_list_get_first(list); reader_entry;
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reader_entry = vreader_list_get_next(reader_entry)) {
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VReader *reader = vreader_list_get_reader(reader_entry);
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vreader_id_t reader_id;
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reader_id = vreader_get_id(reader);
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if (reader_id != -1) {
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continue;
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}
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printf("INA %s %s\n",
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vreader_card_is_present(reader) == VREADER_OK ?
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"CARD_PRESENT" : " ",
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vreader_get_name(reader));
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}
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} else if (*string != 0) {
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printf("valid commands:\n");
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printf("insert [reader_id]\n");
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printf("remove [reader_id]\n");
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printf("select reader_id\n");
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printf("list\n");
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printf("debug [level]\n");
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printf("exit\n");
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}
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}
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vreader_free(reader);
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printf("> ");
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fflush(stdout);
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}
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#define APDUBufSize 270
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/* just for ease of parsing command line arguments. */
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#define MAX_CERTS 100
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static int
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connect_to_qemu(
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const char *host,
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const char *port
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) {
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struct addrinfo hints;
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struct addrinfo *server;
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int ret;
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sock = qemu_socket(AF_INET, SOCK_STREAM, 0);
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if (sock < 0) {
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/* Error */
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fprintf(stderr, "Error opening socket!\n");
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}
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memset(&hints, 0, sizeof(struct addrinfo));
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hints.ai_family = AF_UNSPEC;
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_flags = 0;
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hints.ai_protocol = 0; /* Any protocol */
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ret = getaddrinfo(host, port, &hints, &server);
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if (ret != 0) {
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/* Error */
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fprintf(stderr, "getaddrinfo failed\n");
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return 5;
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}
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if (connect(sock, server->ai_addr, server->ai_addrlen) < 0) {
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/* Error */
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fprintf(stderr, "Could not connect\n");
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return 5;
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}
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if (verbose) {
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printf("Connected (sizeof Header=%zd)!\n", sizeof(VSCMsgHeader));
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}
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return sock;
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}
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static int on_host_init(VSCMsgHeader *mhHeader, VSCMsgInit *incoming)
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{
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uint32_t *capabilities = (incoming->capabilities);
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int num_capabilities =
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1 + ((mhHeader->length - sizeof(VSCMsgInit)) / sizeof(uint32_t));
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int i;
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int rv;
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pthread_t thread_id;
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incoming->version = ntohl(incoming->version);
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if (incoming->version != VSCARD_VERSION) {
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if (verbose > 0) {
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printf("warning: host has version %d, we have %d\n",
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verbose, VSCARD_VERSION);
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}
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}
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if (incoming->magic != VSCARD_MAGIC) {
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printf("unexpected magic: got %d, expected %d\n",
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incoming->magic, VSCARD_MAGIC);
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return -1;
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}
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for (i = 0 ; i < num_capabilities; ++i) {
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capabilities[i] = ntohl(capabilities[i]);
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}
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/* Future: check capabilities */
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/* remove whatever reader might be left in qemu,
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* in case of an unclean previous exit. */
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send_msg(VSC_ReaderRemove, VSCARD_MINIMAL_READER_ID, NULL, 0);
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/* launch the event_thread. This will trigger reader adds for all the
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* existing readers */
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rv = pthread_create(&thread_id, NULL, event_thread, NULL);
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if (rv < 0) {
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perror("pthread_create");
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return rv;
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}
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return 0;
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}
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int
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main(
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int argc,
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char *argv[]
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) {
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char *qemu_host;
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char *qemu_port;
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VSCMsgHeader mhHeader;
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VSCMsgError *error_msg;
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int rv;
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int dwSendLength;
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int dwRecvLength;
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uint8_t pbRecvBuffer[APDUBufSize];
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uint8_t pbSendBuffer[APDUBufSize];
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VReaderStatus reader_status;
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VReader *reader = NULL;
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VCardEmulOptions *command_line_options = NULL;
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char *cert_names[MAX_CERTS];
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char *emul_args = NULL;
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int cert_count = 0;
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int c;
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while ((c = getopt(argc, argv, "c:e:pd:")) != -1) {
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switch (c) {
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case 'c':
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if (cert_count >= MAX_CERTS) {
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printf("too many certificates (max = %d)\n", MAX_CERTS);
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exit(5);
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}
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cert_names[cert_count++] = optarg;
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break;
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case 'e':
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emul_args = optarg;
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break;
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case 'p':
|
||||
print_usage();
|
||||
exit(4);
|
||||
break;
|
||||
case 'd':
|
||||
verbose = get_id_from_string(optarg, 1);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (argc - optind != 2) {
|
||||
print_usage();
|
||||
exit(4);
|
||||
}
|
||||
|
||||
if (cert_count > 0) {
|
||||
char *new_args;
|
||||
int len, i;
|
||||
/* if we've given some -c options, we clearly we want do so some
|
||||
* software emulation. add that emulation now. this is NSS Emulator
|
||||
* specific */
|
||||
if (emul_args == NULL) {
|
||||
emul_args = (char *)"db=\"/etc/pki/nssdb\"";
|
||||
}
|
||||
#define SOFT_STRING ",soft=(,Virtual Reader,CAC,,"
|
||||
/* 2 == close paren & null */
|
||||
len = strlen(emul_args) + strlen(SOFT_STRING) + 2;
|
||||
for (i = 0; i < cert_count; i++) {
|
||||
len += strlen(cert_names[i])+1; /* 1 == comma */
|
||||
}
|
||||
new_args = qemu_malloc(len);
|
||||
strcpy(new_args, emul_args);
|
||||
strcat(new_args, SOFT_STRING);
|
||||
for (i = 0; i < cert_count; i++) {
|
||||
strcat(new_args, cert_names[i]);
|
||||
strcat(new_args, ",");
|
||||
}
|
||||
strcat(new_args, ")");
|
||||
emul_args = new_args;
|
||||
}
|
||||
if (emul_args) {
|
||||
command_line_options = vcard_emul_options(emul_args);
|
||||
}
|
||||
|
||||
qemu_host = strdup(argv[argc - 2]);
|
||||
qemu_port = strdup(argv[argc - 1]);
|
||||
sock = connect_to_qemu(qemu_host, qemu_port);
|
||||
|
||||
qemu_mutex_init(&write_lock);
|
||||
qemu_mutex_init(&pending_reader_lock);
|
||||
qemu_cond_init(&pending_reader_condition);
|
||||
|
||||
vcard_emul_init(command_line_options);
|
||||
|
||||
printf("> ");
|
||||
fflush(stdout);
|
||||
|
||||
/* Send init message, Host responds (and then we send reader attachments) */
|
||||
VSCMsgInit init = {
|
||||
.version = htonl(VSCARD_VERSION),
|
||||
.magic = VSCARD_MAGIC,
|
||||
.capabilities = {0}
|
||||
};
|
||||
send_msg(VSC_Init, mhHeader.reader_id, &init, sizeof(init));
|
||||
|
||||
do {
|
||||
fd_set fds;
|
||||
|
||||
FD_ZERO(&fds);
|
||||
FD_SET(1, &fds);
|
||||
FD_SET(sock, &fds);
|
||||
|
||||
/* waiting on input from the socket */
|
||||
rv = select(sock+1, &fds, NULL, NULL, NULL);
|
||||
if (rv < 0) {
|
||||
/* handle error */
|
||||
perror("select");
|
||||
return 7;
|
||||
}
|
||||
if (FD_ISSET(1, &fds)) {
|
||||
do_command();
|
||||
}
|
||||
if (!FD_ISSET(sock, &fds)) {
|
||||
continue;
|
||||
}
|
||||
|
||||
rv = read(sock, &mhHeader, sizeof(mhHeader));
|
||||
if (rv < sizeof(mhHeader)) {
|
||||
/* Error */
|
||||
if (rv < 0) {
|
||||
perror("header read error\n");
|
||||
} else {
|
||||
fprintf(stderr, "header short read %d\n", rv);
|
||||
}
|
||||
return 8;
|
||||
}
|
||||
mhHeader.type = ntohl(mhHeader.type);
|
||||
mhHeader.reader_id = ntohl(mhHeader.reader_id);
|
||||
mhHeader.length = ntohl(mhHeader.length);
|
||||
if (verbose) {
|
||||
printf("Header: type=%d, reader_id=%d length=%d (0x%x)\n",
|
||||
mhHeader.type, mhHeader.reader_id, mhHeader.length,
|
||||
mhHeader.length);
|
||||
}
|
||||
switch (mhHeader.type) {
|
||||
case VSC_APDU:
|
||||
case VSC_Flush:
|
||||
case VSC_Error:
|
||||
case VSC_Init:
|
||||
rv = read(sock, pbSendBuffer, mhHeader.length);
|
||||
break;
|
||||
default:
|
||||
fprintf(stderr, "Unexpected message of type 0x%X\n", mhHeader.type);
|
||||
return 0;
|
||||
}
|
||||
switch (mhHeader.type) {
|
||||
case VSC_APDU:
|
||||
if (rv < 0) {
|
||||
/* Error */
|
||||
fprintf(stderr, "read error\n");
|
||||
close(sock);
|
||||
return 8;
|
||||
}
|
||||
if (verbose) {
|
||||
printf(" recv APDU: ");
|
||||
print_byte_array(pbSendBuffer, mhHeader.length);
|
||||
}
|
||||
/* Transmit recieved APDU */
|
||||
dwSendLength = mhHeader.length;
|
||||
dwRecvLength = sizeof(pbRecvBuffer);
|
||||
reader = vreader_get_reader_by_id(mhHeader.reader_id);
|
||||
reader_status = vreader_xfr_bytes(reader,
|
||||
pbSendBuffer, dwSendLength,
|
||||
pbRecvBuffer, &dwRecvLength);
|
||||
if (reader_status == VREADER_OK) {
|
||||
mhHeader.length = dwRecvLength;
|
||||
if (verbose) {
|
||||
printf(" send response: ");
|
||||
print_byte_array(pbRecvBuffer, mhHeader.length);
|
||||
}
|
||||
send_msg(VSC_APDU, mhHeader.reader_id,
|
||||
pbRecvBuffer, dwRecvLength);
|
||||
} else {
|
||||
rv = reader_status; /* warning: not meaningful */
|
||||
send_msg(VSC_Error, mhHeader.reader_id, &rv, sizeof(uint32_t));
|
||||
}
|
||||
vreader_free(reader);
|
||||
reader = NULL; /* we've freed it, don't use it by accident
|
||||
again */
|
||||
break;
|
||||
case VSC_Flush:
|
||||
/* TODO: actually flush */
|
||||
send_msg(VSC_FlushComplete, mhHeader.reader_id, NULL, 0);
|
||||
break;
|
||||
case VSC_Error:
|
||||
error_msg = (VSCMsgError *) pbSendBuffer;
|
||||
if (error_msg->code == VSC_SUCCESS) {
|
||||
qemu_mutex_lock(&pending_reader_lock);
|
||||
if (pending_reader) {
|
||||
vreader_set_id(pending_reader, mhHeader.reader_id);
|
||||
vreader_free(pending_reader);
|
||||
pending_reader = NULL;
|
||||
qemu_cond_signal(&pending_reader_condition);
|
||||
}
|
||||
qemu_mutex_unlock(&pending_reader_lock);
|
||||
break;
|
||||
}
|
||||
printf("warning: qemu refused to add reader\n");
|
||||
if (error_msg->code == VSC_CANNOT_ADD_MORE_READERS) {
|
||||
/* clear pending reader, qemu can't handle any more */
|
||||
qemu_mutex_lock(&pending_reader_lock);
|
||||
if (pending_reader) {
|
||||
pending_reader = NULL;
|
||||
/* make sure the event loop doesn't hang */
|
||||
qemu_cond_signal(&pending_reader_condition);
|
||||
}
|
||||
qemu_mutex_unlock(&pending_reader_lock);
|
||||
}
|
||||
break;
|
||||
case VSC_Init:
|
||||
if (on_host_init(&mhHeader, (VSCMsgInit *)pbSendBuffer) < 0) {
|
||||
return -1;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
printf("Default\n");
|
||||
return 0;
|
||||
}
|
||||
} while (rv >= 0);
|
||||
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user