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scd: Fix status check when using PC/SC. 

* scd/apdu.c (struct reader_table_s): Add field of current_state.
(new_reader_slot): Initialize current_state.
(pcsc_get_status): Keep the status in READER_TABLE array.
Return SW_HOST_NO_READER when PCSC_STATE_CHANGED.
* scd/scdaemon.c (handle_connections): Silence a warning.

--

To detect some change of card status, including suspend/resume
possibly, SCardGetStatusChange should be used keeping the
dwCurrentState field.

This change could improve situation for suspend/resume with Yubikey on
Windows.  Even not, this is doing the Right Thing.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
This commit is contained in:
NIIBE Yutaka 2018-03-08 16:51:51 +09:00
parent 334b948981
commit f8b8b6aac2
2 changed files with 14 additions and 3 deletions
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15
scd/apdu.c
View File

@ -119,6 +119,7 @@ struct reader_table_s {
pcsc_dword_t modify_ioctl;
int pinmin;
int pinmax;
pcsc_dword_t current_state;
} pcsc;
#ifdef USE_G10CODE_RAPDU
struct {
@ -453,6 +454,7 @@ new_reader_slot (void)
reader_table[reader].pcsc.modify_ioctl = 0;
reader_table[reader].pcsc.pinmin = -1;
reader_table[reader].pcsc.pinmax = -1;
reader_table[reader].pcsc.current_state = PCSC_STATE_UNAWARE;
return reader;
}
@ -652,12 +654,12 @@ pcsc_get_status (int slot, unsigned int *status, int on_wire)
(void)on_wire;
memset (rdrstates, 0, sizeof *rdrstates);
rdrstates[0].reader = reader_table[slot].rdrname;
rdrstates[0].current_state = PCSC_STATE_UNAWARE;
rdrstates[0].current_state = reader_table[slot].pcsc.current_state;
err = pcsc_get_status_change (reader_table[slot].pcsc.context,
0,
rdrstates, 1);
if (err == PCSC_E_TIMEOUT)
err = 0; /* Timeout is no error error here. */
err = 0; /* Timeout is no error here. */
if (err)
{
log_error ("pcsc_get_status_change failed: %s (0x%lx)\n",
@ -665,6 +667,9 @@ pcsc_get_status (int slot, unsigned int *status, int on_wire)
return pcsc_error_to_sw (err);
}
reader_table[slot].pcsc.current_state =
(rdrstates[0].event_state & ~PCSC_STATE_CHANGED);
/* log_debug */
/* ("pcsc_get_status_change: %s%s%s%s%s%s%s%s%s%s\n", */
/* (rdrstates[0].event_state & PCSC_STATE_IGNORE)? " ignore":"", */
@ -701,7 +706,11 @@ pcsc_get_status (int slot, unsigned int *status, int on_wire)
*status |= APDU_CARD_USABLE;
#endif
return 0;
if (!on_wire && (rdrstates[0].event_state & PCSC_STATE_CHANGED))
/* Event like sleep/resume occurs, which requires RESET. */
return SW_HOST_NO_READER;
else
return 0;
}

2
scd/scdaemon.c
View File

@ -1348,6 +1348,8 @@ handle_connections (int listen_fd)
FD_SET (pipe_fd[0], &read_fdset);
if (max_fd < pipe_fd[0])
max_fd = pipe_fd[0];
#else
(void)max_fd;
#endif
#ifndef HAVE_W32_SYSTEM