qemu/libcacard/vreader.c
Paolo Bonzini 28507a415a libcacard: stop including qemu-common.h
This is a small step towards making libcacard standalone.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2015-04-30 16:05:48 +03:00

579 lines
13 KiB
C

/*
* emulate the reader
*
* This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
* See the COPYING.LIB file in the top-level directory.
*/
#ifdef G_LOG_DOMAIN
#undef G_LOG_DOMAIN
#endif
#define G_LOG_DOMAIN "libcacard"
#include "glib-compat.h"
#include <string.h>
#include "vcard.h"
#include "vcard_emul.h"
#include "card_7816.h"
#include "vreader.h"
#include "vevent.h"
#include "cac.h" /* just for debugging defines */
#define LIBCACARD_LOG_DOMAIN "libcacard"
struct VReaderStruct {
int reference_count;
VCard *card;
char *name;
vreader_id_t id;
CompatGMutex lock;
VReaderEmul *reader_private;
VReaderEmulFree reader_private_free;
};
/*
* Debug helpers
*/
static const char *
apdu_ins_to_string(int ins)
{
switch (ins) {
case VCARD7816_INS_MANAGE_CHANNEL:
return "manage channel";
case VCARD7816_INS_EXTERNAL_AUTHENTICATE:
return "external authenticate";
case VCARD7816_INS_GET_CHALLENGE:
return "get challenge";
case VCARD7816_INS_INTERNAL_AUTHENTICATE:
return "internal authenticate";
case VCARD7816_INS_ERASE_BINARY:
return "erase binary";
case VCARD7816_INS_READ_BINARY:
return "read binary";
case VCARD7816_INS_WRITE_BINARY:
return "write binary";
case VCARD7816_INS_UPDATE_BINARY:
return "update binary";
case VCARD7816_INS_READ_RECORD:
return "read record";
case VCARD7816_INS_WRITE_RECORD:
return "write record";
case VCARD7816_INS_UPDATE_RECORD:
return "update record";
case VCARD7816_INS_APPEND_RECORD:
return "append record";
case VCARD7816_INS_ENVELOPE:
return "envelope";
case VCARD7816_INS_PUT_DATA:
return "put data";
case VCARD7816_INS_GET_DATA:
return "get data";
case VCARD7816_INS_SELECT_FILE:
return "select file";
case VCARD7816_INS_VERIFY:
return "verify";
case VCARD7816_INS_GET_RESPONSE:
return "get response";
case CAC_GET_PROPERTIES:
return "get properties";
case CAC_GET_ACR:
return "get acr";
case CAC_READ_BUFFER:
return "read buffer";
case CAC_UPDATE_BUFFER:
return "update buffer";
case CAC_SIGN_DECRYPT:
return "sign decrypt";
case CAC_GET_CERTIFICATE:
return "get certificate";
}
return "unknown";
}
/* manage locking */
static inline void
vreader_lock(VReader *reader)
{
g_mutex_lock(&reader->lock);
}
static inline void
vreader_unlock(VReader *reader)
{
g_mutex_unlock(&reader->lock);
}
/*
* vreader constructor
*/
VReader *
vreader_new(const char *name, VReaderEmul *private,
VReaderEmulFree private_free)
{
VReader *reader;
reader = g_new(VReader, 1);
g_mutex_init(&reader->lock);
reader->reference_count = 1;
reader->name = g_strdup(name);
reader->card = NULL;
reader->id = (vreader_id_t)-1;
reader->reader_private = private;
reader->reader_private_free = private_free;
return reader;
}
/* get a reference */
VReader*
vreader_reference(VReader *reader)
{
if (reader == NULL) {
return NULL;
}
vreader_lock(reader);
reader->reference_count++;
vreader_unlock(reader);
return reader;
}
/* free a reference */
void
vreader_free(VReader *reader)
{
if (reader == NULL) {
return;
}
vreader_lock(reader);
if (reader->reference_count-- > 1) {
vreader_unlock(reader);
return;
}
vreader_unlock(reader);
g_mutex_clear(&reader->lock);
if (reader->card) {
vcard_free(reader->card);
}
g_free(reader->name);
if (reader->reader_private_free) {
reader->reader_private_free(reader->reader_private);
}
g_free(reader);
}
static VCard *
vreader_get_card(VReader *reader)
{
VCard *card;
vreader_lock(reader);
card = vcard_reference(reader->card);
vreader_unlock(reader);
return card;
}
VReaderStatus
vreader_card_is_present(VReader *reader)
{
VCard *card = vreader_get_card(reader);
if (card == NULL) {
return VREADER_NO_CARD;
}
vcard_free(card);
return VREADER_OK;
}
vreader_id_t
vreader_get_id(VReader *reader)
{
if (reader == NULL) {
return (vreader_id_t)-1;
}
return reader->id;
}
VReaderStatus
vreader_set_id(VReader *reader, vreader_id_t id)
{
if (reader == NULL) {
return VREADER_NO_CARD;
}
reader->id = id;
return VREADER_OK;
}
const char *
vreader_get_name(VReader *reader)
{
if (reader == NULL) {
return NULL;
}
return reader->name;
}
VReaderEmul *
vreader_get_private(VReader *reader)
{
return reader->reader_private;
}
static VReaderStatus
vreader_reset(VReader *reader, VCardPower power, unsigned char *atr, int *len)
{
VCard *card = vreader_get_card(reader);
if (card == NULL) {
return VREADER_NO_CARD;
}
/*
* clean up our state
*/
vcard_reset(card, power);
if (atr) {
vcard_get_atr(card, atr, len);
}
vcard_free(card); /* free our reference */
return VREADER_OK;
}
VReaderStatus
vreader_power_on(VReader *reader, unsigned char *atr, int *len)
{
return vreader_reset(reader, VCARD_POWER_ON, atr, len);
}
VReaderStatus
vreader_power_off(VReader *reader)
{
return vreader_reset(reader, VCARD_POWER_OFF, NULL, 0);
}
VReaderStatus
vreader_xfr_bytes(VReader *reader,
unsigned char *send_buf, int send_buf_len,
unsigned char *receive_buf, int *receive_buf_len)
{
VCardAPDU *apdu;
VCardResponse *response = NULL;
VCardStatus card_status;
unsigned short status;
VCard *card = vreader_get_card(reader);
if (card == NULL) {
return VREADER_NO_CARD;
}
apdu = vcard_apdu_new(send_buf, send_buf_len, &status);
if (apdu == NULL) {
response = vcard_make_response(status);
card_status = VCARD_DONE;
} else {
g_debug("%s: CLS=0x%x,INS=0x%x,P1=0x%x,P2=0x%x,Lc=%d,Le=%d %s",
__func__, apdu->a_cla, apdu->a_ins, apdu->a_p1, apdu->a_p2,
apdu->a_Lc, apdu->a_Le, apdu_ins_to_string(apdu->a_ins));
card_status = vcard_process_apdu(card, apdu, &response);
if (response) {
g_debug("%s: status=%d sw1=0x%x sw2=0x%x len=%d (total=%d)",
__func__, response->b_status, response->b_sw1,
response->b_sw2, response->b_len, response->b_total_len);
}
}
assert(card_status == VCARD_DONE && response);
int size = MIN(*receive_buf_len, response->b_total_len);
memcpy(receive_buf, response->b_data, size);
*receive_buf_len = size;
vcard_response_delete(response);
vcard_apdu_delete(apdu);
vcard_free(card); /* free our reference */
return VREADER_OK;
}
struct VReaderListStruct {
VReaderListEntry *head;
VReaderListEntry *tail;
};
struct VReaderListEntryStruct {
VReaderListEntry *next;
VReaderListEntry *prev;
VReader *reader;
};
static VReaderListEntry *
vreader_list_entry_new(VReader *reader)
{
VReaderListEntry *new_reader_list_entry;
new_reader_list_entry = g_new0(VReaderListEntry, 1);
new_reader_list_entry->reader = vreader_reference(reader);
return new_reader_list_entry;
}
static void
vreader_list_entry_delete(VReaderListEntry *entry)
{
if (entry == NULL) {
return;
}
vreader_free(entry->reader);
g_free(entry);
}
static VReaderList *
vreader_list_new(void)
{
VReaderList *new_reader_list;
new_reader_list = g_new0(VReaderList, 1);
return new_reader_list;
}
void
vreader_list_delete(VReaderList *list)
{
VReaderListEntry *current_entry;
VReaderListEntry *next_entry;
for (current_entry = vreader_list_get_first(list); current_entry;
current_entry = next_entry) {
next_entry = vreader_list_get_next(current_entry);
vreader_list_entry_delete(current_entry);
}
g_free(list);
}
VReaderListEntry *
vreader_list_get_first(VReaderList *list)
{
return list ? list->head : NULL;
}
VReaderListEntry *
vreader_list_get_next(VReaderListEntry *current)
{
return current ? current->next : NULL;
}
VReader *
vreader_list_get_reader(VReaderListEntry *entry)
{
return entry ? vreader_reference(entry->reader) : NULL;
}
static void
vreader_queue(VReaderList *list, VReaderListEntry *entry)
{
if (entry == NULL) {
return;
}
entry->next = NULL;
entry->prev = list->tail;
if (list->head) {
list->tail->next = entry;
} else {
list->head = entry;
}
list->tail = entry;
}
static void
vreader_dequeue(VReaderList *list, VReaderListEntry *entry)
{
if (entry == NULL) {
return;
}
if (entry->next == NULL) {
list->tail = entry->prev;
} else if (entry->prev == NULL) {
list->head = entry->next;
} else {
entry->prev->next = entry->next;
entry->next->prev = entry->prev;
}
if ((list->tail == NULL) || (list->head == NULL)) {
list->head = list->tail = NULL;
}
entry->next = entry->prev = NULL;
}
static VReaderList *vreader_list;
static CompatGMutex vreader_list_mutex;
static void
vreader_list_init(void)
{
vreader_list = vreader_list_new();
}
static void
vreader_list_lock(void)
{
g_mutex_lock(&vreader_list_mutex);
}
static void
vreader_list_unlock(void)
{
g_mutex_unlock(&vreader_list_mutex);
}
static VReaderList *
vreader_copy_list(VReaderList *list)
{
VReaderList *new_list;
VReaderListEntry *current_entry;
new_list = vreader_list_new();
if (new_list == NULL) {
return NULL;
}
for (current_entry = vreader_list_get_first(list); current_entry;
current_entry = vreader_list_get_next(current_entry)) {
VReader *reader = vreader_list_get_reader(current_entry);
VReaderListEntry *new_entry = vreader_list_entry_new(reader);
vreader_free(reader);
vreader_queue(new_list, new_entry);
}
return new_list;
}
VReaderList *
vreader_get_reader_list(void)
{
VReaderList *new_reader_list;
vreader_list_lock();
new_reader_list = vreader_copy_list(vreader_list);
vreader_list_unlock();
return new_reader_list;
}
VReader *
vreader_get_reader_by_id(vreader_id_t id)
{
VReader *reader = NULL;
VReaderListEntry *current_entry;
if (id == (vreader_id_t) -1) {
return NULL;
}
vreader_list_lock();
for (current_entry = vreader_list_get_first(vreader_list); current_entry;
current_entry = vreader_list_get_next(current_entry)) {
VReader *creader = vreader_list_get_reader(current_entry);
if (creader->id == id) {
reader = creader;
break;
}
vreader_free(creader);
}
vreader_list_unlock();
return reader;
}
VReader *
vreader_get_reader_by_name(const char *name)
{
VReader *reader = NULL;
VReaderListEntry *current_entry;
vreader_list_lock();
for (current_entry = vreader_list_get_first(vreader_list); current_entry;
current_entry = vreader_list_get_next(current_entry)) {
VReader *creader = vreader_list_get_reader(current_entry);
if (strcmp(creader->name, name) == 0) {
reader = creader;
break;
}
vreader_free(creader);
}
vreader_list_unlock();
return reader;
}
/* called from card_emul to initialize the readers */
VReaderStatus
vreader_add_reader(VReader *reader)
{
VReaderListEntry *reader_entry;
reader_entry = vreader_list_entry_new(reader);
if (reader_entry == NULL) {
return VREADER_OUT_OF_MEMORY;
}
vreader_list_lock();
vreader_queue(vreader_list, reader_entry);
vreader_list_unlock();
vevent_queue_vevent(vevent_new(VEVENT_READER_INSERT, reader, NULL));
return VREADER_OK;
}
VReaderStatus
vreader_remove_reader(VReader *reader)
{
VReaderListEntry *current_entry;
vreader_list_lock();
for (current_entry = vreader_list_get_first(vreader_list); current_entry;
current_entry = vreader_list_get_next(current_entry)) {
if (current_entry->reader == reader) {
break;
}
}
vreader_dequeue(vreader_list, current_entry);
vreader_list_unlock();
vreader_list_entry_delete(current_entry);
vevent_queue_vevent(vevent_new(VEVENT_READER_REMOVE, reader, NULL));
return VREADER_OK;
}
/*
* Generate VEVENT_CARD_INSERT or VEVENT_CARD_REMOVE based on vreader
* state. Separated from vreader_insert_card to allow replaying events
* for a given state.
*/
void
vreader_queue_card_event(VReader *reader)
{
vevent_queue_vevent(vevent_new(
reader->card ? VEVENT_CARD_INSERT : VEVENT_CARD_REMOVE, reader,
reader->card));
}
/*
* insert/remove a new card. for removal, card == NULL
*/
VReaderStatus
vreader_insert_card(VReader *reader, VCard *card)
{
vreader_lock(reader);
if (reader->card) {
/* decrement reference count */
vcard_free(reader->card);
reader->card = NULL;
}
reader->card = vcard_reference(card);
vreader_unlock(reader);
vreader_queue_card_event(reader);
return VREADER_OK;
}
/*
* initialize all the static reader structures
*/
void
vreader_init(void)
{
vreader_list_init();
}