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scd,pcsc: Use a single context.
* scd/apdu.c (pcsc): New variable. (struct reader_table_s): Remove pcsc.context from member. (pcsc_get_status, connect_pcsc_card): Use pcsc.context. (close_pcsc_reader): Release pcsc.context here with reference count. (apdu_open_one_reader): Move API loading to ... (pcsc_init): new. (apdu_open_one_reader): Remove. (apdu_open_reader): Call open_pcsc_reader instead of apdu_open_one_reader. (open_pcsc_reader): Call pcsc_init if needed. Call close_pcsc_reader instead of pcsc_release_context. Make reader parsing more robust. (apdu_init): Initialize pcsc.count and pcsc.context. -- Signed-off-by: NIIBE Yutaka <gniibe@fsij.org> Backported-from-master: 1080e91efd60cb41c2d6dbafaee810e5967a3161) The backport also adds some other chnages as described above. Signed-off-by: Werner Koch <wk@gnupg.org>
This commit is contained in:
NIIBE Yutaka
Werner Koch
parent
89e20c38c2
commit
987b816860
317
scd/apdu.c
317
scd/apdu.c
@ -88,6 +88,12 @@ typedef unsigned int pcsc_dword_t;
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typedef unsigned long pcsc_dword_t;
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#endif
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/* PC/SC context to access readers. Shared among all readers. */
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static struct pcsc {
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int count;
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long context;
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} pcsc;
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/* A structure to collect information pertaining to one reader
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slot. */
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struct reader_table_s {
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@ -113,7 +119,6 @@ struct reader_table_s {
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ccid_driver_t handle;
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} ccid;
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struct {
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long context;
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long card;
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pcsc_dword_t protocol;
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pcsc_dword_t verify_ioctl;
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@ -673,9 +678,7 @@ pcsc_get_status (int slot, unsigned int *status, int on_wire)
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memset (rdrstates, 0, sizeof *rdrstates);
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rdrstates[0].reader = reader_table[slot].rdrname;
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rdrstates[0].current_state = reader_table[slot].pcsc.current_state;
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err = pcsc_get_status_change (reader_table[slot].pcsc.context,
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0,
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rdrstates, 1);
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err = pcsc_get_status_change (pcsc.context, 0, rdrstates, 1);
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if (err == PCSC_E_TIMEOUT)
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err = 0; /* Timeout is no error here. */
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if (err)
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@ -810,7 +813,13 @@ control_pcsc (int slot, pcsc_dword_t ioctl_code,
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static int
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close_pcsc_reader (int slot)
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{
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pcsc_release_context (reader_table[slot].pcsc.context);
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(void)slot;
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log_assert (pcsc.count > 0);
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if (--pcsc.count == 0)
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{
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pcsc_release_context (pcsc.context);
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pcsc.context = -1;
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}
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return 0;
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}
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@ -829,7 +838,7 @@ connect_pcsc_card (int slot)
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reader_table[slot].atrlen = 0;
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reader_table[slot].is_t0 = 0;
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err = pcsc_connect (reader_table[slot].pcsc.context,
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err = pcsc_connect (pcsc.context,
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reader_table[slot].rdrname,
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opt.pcsc_shared? PCSC_SHARE_SHARED:PCSC_SHARE_EXCLUSIVE,
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PCSC_PROTOCOL_T0|PCSC_PROTOCOL_T1,
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@ -844,7 +853,7 @@ connect_pcsc_card (int slot)
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if (err == PCSC_W_REMOVED_CARD && pcsc_cancel)
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{
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long err2;
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err2 = pcsc_cancel (reader_table[slot].pcsc.context);
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err2 = pcsc_cancel (pcsc.context);
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if (err2)
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log_error ("pcsc_cancel failed: %s (0x%lx)\n",
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pcsc_error_string (err2), err2);
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@ -861,7 +870,7 @@ connect_pcsc_card (int slot)
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pcsc_vendor_specific_init (slot);
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atrlen = DIM (reader_table[0].atr);
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readerlen = sizeof reader -1 ;
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readerlen = sizeof reader - 1;
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err = pcsc_status (reader_table[slot].pcsc.card,
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reader, &readerlen,
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&card_state, &card_protocol,
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@ -1074,9 +1083,111 @@ pcsc_vendor_specific_init (int slot)
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return 0;
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}
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static int
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pcsc_init (void)
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{
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static int pcsc_api_loaded;
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long err;
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/* Open the PC/SC reader without using the wrapper. Returns -1 on
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error or a slot number for the reader. */
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/* Load the PC/SC API */
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if (!pcsc_api_loaded)
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{
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void *handle;
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handle = dlopen (opt.pcsc_driver, RTLD_LAZY);
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if (!handle)
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{
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log_error ("pscd_open_reader: failed to open driver '%s': %s\n",
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opt.pcsc_driver, dlerror ());
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return -1;
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}
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pcsc_establish_context = dlsym (handle, "SCardEstablishContext");
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pcsc_release_context = dlsym (handle, "SCardReleaseContext");
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pcsc_cancel = dlsym (handle, "SCardCancel");
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pcsc_list_readers = dlsym (handle, "SCardListReaders");
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#if defined(_WIN32) || defined(__CYGWIN__)
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if (!pcsc_list_readers)
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pcsc_list_readers = dlsym (handle, "SCardListReadersA");
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#endif
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pcsc_get_status_change = dlsym (handle, "SCardGetStatusChange");
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#if defined(_WIN32) || defined(__CYGWIN__)
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if (!pcsc_get_status_change)
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pcsc_get_status_change = dlsym (handle, "SCardGetStatusChangeA");
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#endif
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pcsc_connect = dlsym (handle, "SCardConnect");
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#if defined(_WIN32) || defined(__CYGWIN__)
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if (!pcsc_connect)
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pcsc_connect = dlsym (handle, "SCardConnectA");
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#endif
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pcsc_reconnect = dlsym (handle, "SCardReconnect");
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#if defined(_WIN32) || defined(__CYGWIN__)
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if (!pcsc_reconnect)
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pcsc_reconnect = dlsym (handle, "SCardReconnectA");
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#endif
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pcsc_disconnect = dlsym (handle, "SCardDisconnect");
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pcsc_status = dlsym (handle, "SCardStatus");
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#if defined(_WIN32) || defined(__CYGWIN__)
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if (!pcsc_status)
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pcsc_status = dlsym (handle, "SCardStatusA");
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#endif
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pcsc_begin_transaction = dlsym (handle, "SCardBeginTransaction");
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pcsc_end_transaction = dlsym (handle, "SCardEndTransaction");
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pcsc_transmit = dlsym (handle, "SCardTransmit");
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pcsc_set_timeout = dlsym (handle, "SCardSetTimeout");
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pcsc_control = dlsym (handle, "SCardControl");
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if (!pcsc_establish_context
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|| !pcsc_release_context
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|| !pcsc_list_readers
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|| !pcsc_get_status_change
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|| !pcsc_connect
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|| !pcsc_reconnect
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|| !pcsc_disconnect
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|| !pcsc_status
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|| !pcsc_begin_transaction
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|| !pcsc_end_transaction
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|| !pcsc_transmit
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|| !pcsc_control
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/* || !pcsc_set_timeout */)
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{
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/* Note that set_timeout is currently not used and also not
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available under Windows. */
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log_error ("pcsc_open_reader: invalid PC/SC driver "
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"(%d%d%d%d%d%d%d%d%d%d%d%d%d)\n",
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!!pcsc_establish_context,
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!!pcsc_release_context,
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!!pcsc_list_readers,
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!!pcsc_get_status_change,
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!!pcsc_connect,
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!!pcsc_reconnect,
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!!pcsc_disconnect,
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!!pcsc_status,
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!!pcsc_begin_transaction,
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!!pcsc_end_transaction,
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!!pcsc_transmit,
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!!pcsc_set_timeout,
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!!pcsc_control );
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dlclose (handle);
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return -1;
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}
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pcsc_api_loaded = 1;
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}
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err = pcsc_establish_context (PCSC_SCOPE_SYSTEM, NULL, NULL, &pcsc.context);
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if (err)
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{
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log_error ("pcsc_establish_context failed: %s (0x%lx)\n",
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pcsc_error_string (err), err);
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return -1;
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}
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pcsc.count++;
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return 0;
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}
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/* Open the PC/SC reader. If PORTSTR is NULL we default to a suitable
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port. Returns -1 on error or a slot number for the reader. */
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static int
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open_pcsc_reader (const char *portstr)
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{
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@ -1086,66 +1197,67 @@ open_pcsc_reader (const char *portstr)
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char *rdrname = NULL;
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pcsc_dword_t nreader;
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char *p;
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size_t n;
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if (pcsc.context < 0)
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if (pcsc_init () < 0)
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return -1;
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if (DBG_READER)
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log_debug ("open_pcsc_reader(portstr=%s)\n", portstr);
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slot = new_reader_slot ();
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if (slot == -1)
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return -1;
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return -1; /* No need to cleanup here. */
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/* Fixme: Allocating a context for each slot is not required. One
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global context should be sufficient. */
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err = pcsc_establish_context (PCSC_SCOPE_SYSTEM, NULL, NULL,
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&reader_table[slot].pcsc.context);
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if (err)
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{
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log_error ("pcsc_establish_context failed: %s (0x%lx)\n",
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pcsc_error_string (err), err);
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reader_table[slot].used = 0;
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unlock_slot (slot);
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return -1;
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}
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err = pcsc_list_readers (reader_table[slot].pcsc.context,
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NULL, NULL, &nreader);
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err = pcsc_list_readers (pcsc.context, NULL, NULL, &nreader);
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if (!err)
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{
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list = xtrymalloc (nreader+1); /* Better add 1 for safety reasons. */
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if (!list)
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{
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log_error ("error allocating memory for reader list\n");
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pcsc_release_context (reader_table[slot].pcsc.context);
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close_pcsc_reader (slot);
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reader_table[slot].used = 0;
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unlock_slot (slot);
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return -1 /*SW_HOST_OUT_OF_CORE*/;
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slot = -1 /*SW_HOST_OUT_OF_CORE*/;
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goto leave;
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}
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err = pcsc_list_readers (reader_table[slot].pcsc.context,
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NULL, list, &nreader);
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err = pcsc_list_readers (pcsc.context, NULL, list, &nreader);
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}
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if (err)
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{
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log_error ("pcsc_list_readers failed: %s (0x%lx)\n",
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pcsc_error_string (err), err);
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pcsc_release_context (reader_table[slot].pcsc.context);
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close_pcsc_reader (slot);
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reader_table[slot].used = 0;
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xfree (list);
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unlock_slot (slot);
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return -1;
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xfree (list);
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slot = -1;
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goto leave;
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}
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p = list;
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while (nreader)
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while (nreader > 0)
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{
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if (!*p && !p[1])
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if (!*p)
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break;
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log_info ("detected reader '%s'\n", p);
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if (nreader < (strlen (p)+1))
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{
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log_error ("invalid response from pcsc_list_readers\n");
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for (n=0; n < nreader; n++)
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if (!p[n])
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break;
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}
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if (n >= nreader)
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{
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log_error ("invalid response from pcsc_list_readers\n");
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break;
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}
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log_info ("detected reader '%s'\n", p);
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if (!rdrname && portstr && !strncmp (p, portstr, strlen (portstr)))
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rdrname = p;
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nreader -= strlen (p)+1;
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p += strlen (p) + 1;
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nreader -= n + 1;
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p += n + 1;
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}
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if (!rdrname)
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@ -1155,10 +1267,11 @@ open_pcsc_reader (const char *portstr)
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if (!reader_table[slot].rdrname)
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{
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log_error ("error allocating memory for reader name\n");
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pcsc_release_context (reader_table[slot].pcsc.context);
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close_pcsc_reader (slot);
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reader_table[slot].used = 0;
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unlock_slot (slot);
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return -1;
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slot = -1;
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goto leave;
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}
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xfree (list);
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list = NULL;
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@ -1176,6 +1289,10 @@ open_pcsc_reader (const char *portstr)
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dump_reader_status (slot);
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unlock_slot (slot);
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leave:
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if (DBG_READER)
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log_debug ("open_pcsc_reader => slot=%d\n", slot);
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return slot;
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}
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@ -1960,110 +2077,6 @@ apdu_dev_list_finish (struct dev_list *dl)
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}
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/* Open the reader and return an internal slot number or -1 on
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error. If PORTSTR is NULL we default to a suitable port (for ctAPI:
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the first USB reader. For PC/SC the first listed reader). */
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static int
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apdu_open_one_reader (const char *portstr)
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{
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static int pcsc_api_loaded;
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int slot;
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if (DBG_READER)
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log_debug ("enter: apdu_open_reader: portstr=%s\n", portstr);
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/* Lets try the PC/SC API */
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if (!pcsc_api_loaded)
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{
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void *handle;
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handle = dlopen (opt.pcsc_driver, RTLD_LAZY);
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if (!handle)
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{
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log_error ("apdu_open_reader: failed to open driver '%s': %s\n",
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opt.pcsc_driver, dlerror ());
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return -1;
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}
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pcsc_establish_context = dlsym (handle, "SCardEstablishContext");
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pcsc_release_context = dlsym (handle, "SCardReleaseContext");
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pcsc_cancel = dlsym (handle, "SCardCancel");
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pcsc_list_readers = dlsym (handle, "SCardListReaders");
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#if defined(_WIN32) || defined(__CYGWIN__)
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if (!pcsc_list_readers)
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pcsc_list_readers = dlsym (handle, "SCardListReadersA");
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#endif
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pcsc_get_status_change = dlsym (handle, "SCardGetStatusChange");
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#if defined(_WIN32) || defined(__CYGWIN__)
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if (!pcsc_get_status_change)
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pcsc_get_status_change = dlsym (handle, "SCardGetStatusChangeA");
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#endif
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pcsc_connect = dlsym (handle, "SCardConnect");
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#if defined(_WIN32) || defined(__CYGWIN__)
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if (!pcsc_connect)
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pcsc_connect = dlsym (handle, "SCardConnectA");
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#endif
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pcsc_reconnect = dlsym (handle, "SCardReconnect");
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#if defined(_WIN32) || defined(__CYGWIN__)
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if (!pcsc_reconnect)
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pcsc_reconnect = dlsym (handle, "SCardReconnectA");
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#endif
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pcsc_disconnect = dlsym (handle, "SCardDisconnect");
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pcsc_status = dlsym (handle, "SCardStatus");
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#if defined(_WIN32) || defined(__CYGWIN__)
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if (!pcsc_status)
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pcsc_status = dlsym (handle, "SCardStatusA");
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#endif
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pcsc_begin_transaction = dlsym (handle, "SCardBeginTransaction");
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pcsc_end_transaction = dlsym (handle, "SCardEndTransaction");
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pcsc_transmit = dlsym (handle, "SCardTransmit");
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pcsc_set_timeout = dlsym (handle, "SCardSetTimeout");
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pcsc_control = dlsym (handle, "SCardControl");
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if (!pcsc_establish_context
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|| !pcsc_release_context
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|| !pcsc_list_readers
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|| !pcsc_get_status_change
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|| !pcsc_connect
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|| !pcsc_reconnect
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|| !pcsc_disconnect
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|| !pcsc_status
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|| !pcsc_begin_transaction
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|| !pcsc_end_transaction
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|| !pcsc_transmit
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|| !pcsc_control
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/* || !pcsc_set_timeout */)
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{
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/* Note that set_timeout is currently not used and also not
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available under Windows. */
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log_error ("apdu_open_reader: invalid PC/SC driver "
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"(%d%d%d%d%d%d%d%d%d%d%d%d%d)\n",
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!!pcsc_establish_context,
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!!pcsc_release_context,
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!!pcsc_list_readers,
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!!pcsc_get_status_change,
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!!pcsc_connect,
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!!pcsc_reconnect,
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!!pcsc_disconnect,
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!!pcsc_status,
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!!pcsc_begin_transaction,
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!!pcsc_end_transaction,
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!!pcsc_transmit,
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!!pcsc_set_timeout,
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!!pcsc_control );
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dlclose (handle);
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return -1;
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}
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pcsc_api_loaded = 1;
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}
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slot = open_pcsc_reader (portstr);
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if (DBG_READER)
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log_debug ("leave: apdu_open_reader => slot=%d [pc/sc]\n", slot);
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return slot;
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}
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int
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apdu_open_reader (struct dev_list *dl, int app_empty)
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{
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@ -2144,7 +2157,7 @@ apdu_open_reader (struct dev_list *dl, int app_empty)
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if (app_empty && dl->idx == dl->idx_max)
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{
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dl->idx++;
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slot = apdu_open_one_reader (dl->portstr);
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slot = open_pcsc_reader (dl->portstr);
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}
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else
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slot = -1;
|
||||
@ -2152,10 +2165,11 @@ apdu_open_reader (struct dev_list *dl, int app_empty)
|
||||
else
|
||||
#endif
|
||||
{ /* PC/SC readers. */
|
||||
|
||||
if (app_empty && dl->idx == 0)
|
||||
{
|
||||
dl->idx++;
|
||||
slot = apdu_open_one_reader (dl->portstr);
|
||||
slot = open_pcsc_reader (dl->portstr);
|
||||
}
|
||||
else
|
||||
slot = -1;
|
||||
@ -3338,6 +3352,9 @@ apdu_init (void)
|
||||
gpg_error_t err;
|
||||
int i;
|
||||
|
||||
pcsc.count = 0;
|
||||
pcsc.context = -1;
|
||||
|
||||
if (npth_mutex_init (&reader_table_lock, NULL))
|
||||
goto leave;
|
||||
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user