root / libcacard / vscclient.c @ 7267c094
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/*
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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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|
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#include <netdb.h> |
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|
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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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|
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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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|
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int verbose;
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|
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int sock;
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|
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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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|
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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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|
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static QemuMutex write_lock;
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|
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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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|
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qemu_mutex_lock(&write_lock); |
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|
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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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|
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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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|
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return 0; |
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} |
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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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|
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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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|
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|
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while (1) { |
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const char *reader_name; |
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|
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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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|
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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) { |
227 |
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); |
237 |
if (reader_id == -1) { |
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continue;
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} |
240 |
/* 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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} |
247 |
exit(0);
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} else if (strncmp(string, "insert", 6) == 0) { |
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if (string[6] == ' ') { |
250 |
reader_id = get_id_from_string(&string[7], reader_id);
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} |
252 |
reader = vreader_get_reader_by_id(reader_id); |
253 |
if (reader != NULL) { |
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error = vcard_emul_force_card_insert(reader); |
255 |
printf("insert %s, returned %d\n",
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reader ? vreader_get_name(reader) |
257 |
: "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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} |
261 |
} else if (strncmp(string, "remove", 6) == 0) { |
262 |
if (string[6] == ' ') { |
263 |
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); |
266 |
if (reader != NULL) { |
267 |
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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} |
274 |
} 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); |
278 |
} |
279 |
if (reader_id != VSCARD_UNDEFINED_READER_ID) {
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reader = vreader_get_reader_by_id(reader_id); |
281 |
} |
282 |
if (reader) {
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printf("Selecting reader %d, %s\n", reader_id,
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vreader_get_name(reader)); |
285 |
default_reader_id = reader_id; |
286 |
} else {
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printf("Reader with id %d not found\n", reader_id);
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} |
289 |
} else if (strncmp(string, "debug", 5) == 0) { |
290 |
if (string[5] == ' ') { |
291 |
verbose = get_id_from_string(&string[6], 0); |
292 |
} |
293 |
printf("debug level = %d\n", verbose);
|
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} else if (strncmp(string, "list", 4) == 0) { |
295 |
VReaderList *list = vreader_get_reader_list(); |
296 |
VReaderListEntry *reader_entry; |
297 |
printf("Active Readers:\n");
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298 |
for (reader_entry = vreader_list_get_first(list); reader_entry;
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reader_entry = vreader_list_get_next(reader_entry)) { |
300 |
VReader *reader = vreader_list_get_reader(reader_entry); |
301 |
vreader_id_t reader_id; |
302 |
reader_id = vreader_get_id(reader); |
303 |
if (reader_id == -1) { |
304 |
continue;
|
305 |
} |
306 |
printf("%3d %s %s\n", reader_id,
|
307 |
vreader_card_is_present(reader) == VREADER_OK ? |
308 |
"CARD_PRESENT" : " ", |
309 |
vreader_get_name(reader)); |
310 |
} |
311 |
printf("Inactive Readers:\n");
|
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for (reader_entry = vreader_list_get_first(list); reader_entry;
|
313 |
reader_entry = vreader_list_get_next(reader_entry)) { |
314 |
VReader *reader = vreader_list_get_reader(reader_entry); |
315 |
vreader_id_t reader_id; |
316 |
reader_id = vreader_get_id(reader); |
317 |
if (reader_id != -1) { |
318 |
continue;
|
319 |
} |
320 |
|
321 |
printf("INA %s %s\n",
|
322 |
vreader_card_is_present(reader) == VREADER_OK ? |
323 |
"CARD_PRESENT" : " ", |
324 |
vreader_get_name(reader)); |
325 |
} |
326 |
} else if (*string != 0) { |
327 |
printf("valid commands:\n");
|
328 |
printf("insert [reader_id]\n");
|
329 |
printf("remove [reader_id]\n");
|
330 |
printf("select reader_id\n");
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331 |
printf("list\n");
|
332 |
printf("debug [level]\n");
|
333 |
printf("exit\n");
|
334 |
} |
335 |
} |
336 |
vreader_free(reader); |
337 |
printf("> ");
|
338 |
fflush(stdout); |
339 |
} |
340 |
|
341 |
|
342 |
#define APDUBufSize 270 |
343 |
|
344 |
/* just for ease of parsing command line arguments. */
|
345 |
#define MAX_CERTS 100 |
346 |
|
347 |
static int |
348 |
connect_to_qemu( |
349 |
const char *host, |
350 |
const char *port |
351 |
) { |
352 |
struct addrinfo hints;
|
353 |
struct addrinfo *server;
|
354 |
int ret;
|
355 |
|
356 |
sock = qemu_socket(AF_INET, SOCK_STREAM, 0);
|
357 |
if (sock < 0) { |
358 |
/* Error */
|
359 |
fprintf(stderr, "Error opening socket!\n");
|
360 |
} |
361 |
|
362 |
memset(&hints, 0, sizeof(struct addrinfo)); |
363 |
hints.ai_family = AF_UNSPEC; |
364 |
hints.ai_socktype = SOCK_STREAM; |
365 |
hints.ai_flags = 0;
|
366 |
hints.ai_protocol = 0; /* Any protocol */ |
367 |
|
368 |
ret = getaddrinfo(host, port, &hints, &server); |
369 |
|
370 |
if (ret != 0) { |
371 |
/* Error */
|
372 |
fprintf(stderr, "getaddrinfo failed\n");
|
373 |
return 5; |
374 |
} |
375 |
|
376 |
if (connect(sock, server->ai_addr, server->ai_addrlen) < 0) { |
377 |
/* Error */
|
378 |
fprintf(stderr, "Could not connect\n");
|
379 |
return 5; |
380 |
} |
381 |
if (verbose) {
|
382 |
printf("Connected (sizeof Header=%zd)!\n", sizeof(VSCMsgHeader)); |
383 |
} |
384 |
return sock;
|
385 |
} |
386 |
|
387 |
static int on_host_init(VSCMsgHeader *mhHeader, VSCMsgInit *incoming) |
388 |
{ |
389 |
uint32_t *capabilities = (incoming->capabilities); |
390 |
int num_capabilities =
|
391 |
1 + ((mhHeader->length - sizeof(VSCMsgInit)) / sizeof(uint32_t)); |
392 |
int i;
|
393 |
int rv;
|
394 |
pthread_t thread_id; |
395 |
|
396 |
incoming->version = ntohl(incoming->version); |
397 |
if (incoming->version != VSCARD_VERSION) {
|
398 |
if (verbose > 0) { |
399 |
printf("warning: host has version %d, we have %d\n",
|
400 |
verbose, VSCARD_VERSION); |
401 |
} |
402 |
} |
403 |
if (incoming->magic != VSCARD_MAGIC) {
|
404 |
printf("unexpected magic: got %d, expected %d\n",
|
405 |
incoming->magic, VSCARD_MAGIC); |
406 |
return -1; |
407 |
} |
408 |
for (i = 0 ; i < num_capabilities; ++i) { |
409 |
capabilities[i] = ntohl(capabilities[i]); |
410 |
} |
411 |
/* Future: check capabilities */
|
412 |
/* remove whatever reader might be left in qemu,
|
413 |
* in case of an unclean previous exit. */
|
414 |
send_msg(VSC_ReaderRemove, VSCARD_MINIMAL_READER_ID, NULL, 0); |
415 |
/* launch the event_thread. This will trigger reader adds for all the
|
416 |
* existing readers */
|
417 |
rv = pthread_create(&thread_id, NULL, event_thread, NULL); |
418 |
if (rv < 0) { |
419 |
perror("pthread_create");
|
420 |
return rv;
|
421 |
} |
422 |
return 0; |
423 |
} |
424 |
|
425 |
int
|
426 |
main( |
427 |
int argc,
|
428 |
char *argv[]
|
429 |
) { |
430 |
char *qemu_host;
|
431 |
char *qemu_port;
|
432 |
VSCMsgHeader mhHeader; |
433 |
VSCMsgError *error_msg; |
434 |
|
435 |
int rv;
|
436 |
int dwSendLength;
|
437 |
int dwRecvLength;
|
438 |
uint8_t pbRecvBuffer[APDUBufSize]; |
439 |
uint8_t pbSendBuffer[APDUBufSize]; |
440 |
VReaderStatus reader_status; |
441 |
VReader *reader = NULL;
|
442 |
VCardEmulOptions *command_line_options = NULL;
|
443 |
|
444 |
char *cert_names[MAX_CERTS];
|
445 |
char *emul_args = NULL; |
446 |
int cert_count = 0; |
447 |
int c;
|
448 |
|
449 |
while ((c = getopt(argc, argv, "c:e:pd:")) != -1) { |
450 |
switch (c) {
|
451 |
case 'c': |
452 |
if (cert_count >= MAX_CERTS) {
|
453 |
printf("too many certificates (max = %d)\n", MAX_CERTS);
|
454 |
exit(5);
|
455 |
} |
456 |
cert_names[cert_count++] = optarg; |
457 |
break;
|
458 |
case 'e': |
459 |
emul_args = optarg; |
460 |
break;
|
461 |
case 'p': |
462 |
print_usage(); |
463 |
exit(4);
|
464 |
break;
|
465 |
case 'd': |
466 |
verbose = get_id_from_string(optarg, 1);
|
467 |
break;
|
468 |
} |
469 |
} |
470 |
|
471 |
if (argc - optind != 2) { |
472 |
print_usage(); |
473 |
exit(4);
|
474 |
} |
475 |
|
476 |
if (cert_count > 0) { |
477 |
char *new_args;
|
478 |
int len, i;
|
479 |
/* if we've given some -c options, we clearly we want do so some
|
480 |
* software emulation. add that emulation now. this is NSS Emulator
|
481 |
* specific */
|
482 |
if (emul_args == NULL) { |
483 |
emul_args = (char *)"db=\"/etc/pki/nssdb\""; |
484 |
} |
485 |
#define SOFT_STRING ",soft=(,Virtual Reader,CAC,," |
486 |
/* 2 == close paren & null */
|
487 |
len = strlen(emul_args) + strlen(SOFT_STRING) + 2;
|
488 |
for (i = 0; i < cert_count; i++) { |
489 |
len += strlen(cert_names[i])+1; /* 1 == comma */ |
490 |
} |
491 |
new_args = g_malloc(len); |
492 |
strcpy(new_args, emul_args); |
493 |
strcat(new_args, SOFT_STRING); |
494 |
for (i = 0; i < cert_count; i++) { |
495 |
strcat(new_args, cert_names[i]); |
496 |
strcat(new_args, ",");
|
497 |
} |
498 |
strcat(new_args, ")");
|
499 |
emul_args = new_args; |
500 |
} |
501 |
if (emul_args) {
|
502 |
command_line_options = vcard_emul_options(emul_args); |
503 |
} |
504 |
|
505 |
qemu_host = strdup(argv[argc - 2]);
|
506 |
qemu_port = strdup(argv[argc - 1]);
|
507 |
sock = connect_to_qemu(qemu_host, qemu_port); |
508 |
|
509 |
qemu_mutex_init(&write_lock); |
510 |
qemu_mutex_init(&pending_reader_lock); |
511 |
qemu_cond_init(&pending_reader_condition); |
512 |
|
513 |
vcard_emul_init(command_line_options); |
514 |
|
515 |
printf("> ");
|
516 |
fflush(stdout); |
517 |
|
518 |
/* Send init message, Host responds (and then we send reader attachments) */
|
519 |
VSCMsgInit init = { |
520 |
.version = htonl(VSCARD_VERSION), |
521 |
.magic = VSCARD_MAGIC, |
522 |
.capabilities = {0}
|
523 |
}; |
524 |
send_msg(VSC_Init, mhHeader.reader_id, &init, sizeof(init));
|
525 |
|
526 |
do {
|
527 |
fd_set fds; |
528 |
|
529 |
FD_ZERO(&fds); |
530 |
FD_SET(1, &fds);
|
531 |
FD_SET(sock, &fds); |
532 |
|
533 |
/* waiting on input from the socket */
|
534 |
rv = select(sock+1, &fds, NULL, NULL, NULL); |
535 |
if (rv < 0) { |
536 |
/* handle error */
|
537 |
perror("select");
|
538 |
return 7; |
539 |
} |
540 |
if (FD_ISSET(1, &fds)) { |
541 |
do_command(); |
542 |
} |
543 |
if (!FD_ISSET(sock, &fds)) {
|
544 |
continue;
|
545 |
} |
546 |
|
547 |
rv = read(sock, &mhHeader, sizeof(mhHeader));
|
548 |
if (rv < sizeof(mhHeader)) { |
549 |
/* Error */
|
550 |
if (rv < 0) { |
551 |
perror("header read error\n");
|
552 |
} else {
|
553 |
fprintf(stderr, "header short read %d\n", rv);
|
554 |
} |
555 |
return 8; |
556 |
} |
557 |
mhHeader.type = ntohl(mhHeader.type); |
558 |
mhHeader.reader_id = ntohl(mhHeader.reader_id); |
559 |
mhHeader.length = ntohl(mhHeader.length); |
560 |
if (verbose) {
|
561 |
printf("Header: type=%d, reader_id=%d length=%d (0x%x)\n",
|
562 |
mhHeader.type, mhHeader.reader_id, mhHeader.length, |
563 |
mhHeader.length); |
564 |
} |
565 |
switch (mhHeader.type) {
|
566 |
case VSC_APDU:
|
567 |
case VSC_Flush:
|
568 |
case VSC_Error:
|
569 |
case VSC_Init:
|
570 |
rv = read(sock, pbSendBuffer, mhHeader.length); |
571 |
break;
|
572 |
default:
|
573 |
fprintf(stderr, "Unexpected message of type 0x%X\n", mhHeader.type);
|
574 |
return 0; |
575 |
} |
576 |
switch (mhHeader.type) {
|
577 |
case VSC_APDU:
|
578 |
if (rv < 0) { |
579 |
/* Error */
|
580 |
fprintf(stderr, "read error\n");
|
581 |
close(sock); |
582 |
return 8; |
583 |
} |
584 |
if (verbose) {
|
585 |
printf(" recv APDU: ");
|
586 |
print_byte_array(pbSendBuffer, mhHeader.length); |
587 |
} |
588 |
/* Transmit recieved APDU */
|
589 |
dwSendLength = mhHeader.length; |
590 |
dwRecvLength = sizeof(pbRecvBuffer);
|
591 |
reader = vreader_get_reader_by_id(mhHeader.reader_id); |
592 |
reader_status = vreader_xfr_bytes(reader, |
593 |
pbSendBuffer, dwSendLength, |
594 |
pbRecvBuffer, &dwRecvLength); |
595 |
if (reader_status == VREADER_OK) {
|
596 |
mhHeader.length = dwRecvLength; |
597 |
if (verbose) {
|
598 |
printf(" send response: ");
|
599 |
print_byte_array(pbRecvBuffer, mhHeader.length); |
600 |
} |
601 |
send_msg(VSC_APDU, mhHeader.reader_id, |
602 |
pbRecvBuffer, dwRecvLength); |
603 |
} else {
|
604 |
rv = reader_status; /* warning: not meaningful */
|
605 |
send_msg(VSC_Error, mhHeader.reader_id, &rv, sizeof(uint32_t));
|
606 |
} |
607 |
vreader_free(reader); |
608 |
reader = NULL; /* we've freed it, don't use it by accident |
609 |
again */
|
610 |
break;
|
611 |
case VSC_Flush:
|
612 |
/* TODO: actually flush */
|
613 |
send_msg(VSC_FlushComplete, mhHeader.reader_id, NULL, 0); |
614 |
break;
|
615 |
case VSC_Error:
|
616 |
error_msg = (VSCMsgError *) pbSendBuffer; |
617 |
if (error_msg->code == VSC_SUCCESS) {
|
618 |
qemu_mutex_lock(&pending_reader_lock); |
619 |
if (pending_reader) {
|
620 |
vreader_set_id(pending_reader, mhHeader.reader_id); |
621 |
vreader_free(pending_reader); |
622 |
pending_reader = NULL;
|
623 |
qemu_cond_signal(&pending_reader_condition); |
624 |
} |
625 |
qemu_mutex_unlock(&pending_reader_lock); |
626 |
break;
|
627 |
} |
628 |
printf("warning: qemu refused to add reader\n");
|
629 |
if (error_msg->code == VSC_CANNOT_ADD_MORE_READERS) {
|
630 |
/* clear pending reader, qemu can't handle any more */
|
631 |
qemu_mutex_lock(&pending_reader_lock); |
632 |
if (pending_reader) {
|
633 |
pending_reader = NULL;
|
634 |
/* make sure the event loop doesn't hang */
|
635 |
qemu_cond_signal(&pending_reader_condition); |
636 |
} |
637 |
qemu_mutex_unlock(&pending_reader_lock); |
638 |
} |
639 |
break;
|
640 |
case VSC_Init:
|
641 |
if (on_host_init(&mhHeader, (VSCMsgInit *)pbSendBuffer) < 0) { |
642 |
return -1; |
643 |
} |
644 |
break;
|
645 |
default:
|
646 |
printf("Default\n");
|
647 |
return 0; |
648 |
} |
649 |
} while (rv >= 0); |
650 |
|
651 |
return 0; |
652 |
} |