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scd: Add --demand option for SERIALNO.

Browse Source 
* scd/app.c (select_application): Add SERIALNO_BIN and SERIALNO_BIN_LEN
arguments.  Return matched APP with a serial number when specified.
* scd/command.c (open_card): Modify for the implicit open only.
(open_card_with_request): New for explicit open and support match with a
serial number.
(cmd_serialno): Support --demand option.
(cmd_learn, cmd_readcert, cmd_readkey, cmd_pksign, cmd_pkauth)
(cmd_pkdecrypt, cmd_getattr, cmd_setattr, cmd_writecert, cmd_writekey)
(cmd_genkey, cmd_random, cmd_passwd, cmd_checkpin, cmd_apdu): Follow
the change of open_card.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
This commit is contained in:
NIIBE Yutaka 2017-01-16 10:26:16 +09:00
parent 3db76c9277
commit 2e6f1c99d4
3 changed files with 91 additions and 39 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
scd/app-common.h
View File

@ -129,7 +129,8 @@ void application_notify_card_reset (int slot);
gpg_error_t check_application_conflict (const char *name, app_t app);
gpg_error_t app_reset (app_t app, ctrl_t ctrl, int send_reset);
gpg_error_t select_application (ctrl_t ctrl, const char *name, app_t *r_app,
int scan);
int scan, const unsigned char *serialno_bin,
size_t serialno_bin_len);
char *get_supported_applications (void);
void release_application (app_t app);
gpg_error_t app_munge_serialno (app_t app);

37
scd/app.c
View File

@ -317,10 +317,12 @@ app_new_register (int slot, ctrl_t ctrl, const char *name)
and return a context. Returns an error code and stores NULL at
R_APP if no application was found or no card is present. */
gpg_error_t
select_application (ctrl_t ctrl, const char *name, app_t *r_app, int scan)
select_application (ctrl_t ctrl, const char *name, app_t *r_app,
int scan, const unsigned char *serialno_bin,
size_t serialno_bin_len)
{
gpg_error_t err = 0;
app_t app;
app_t a;
*r_app = NULL;
@ -352,33 +354,50 @@ select_application (ctrl_t ctrl, const char *name, app_t *r_app, int scan)
if (!sw || sw == SW_HOST_ALREADY_CONNECTED)
err = 0;
else if (sw == SW_HOST_NO_CARD)
err = gpg_error (GPG_ERR_CARD_NOT_PRESENT);
else
err = gpg_error (GPG_ERR_ENODEV);
if (!err)
err = app_new_register (slot, ctrl, name);
else
{
/* We close a reader with no card. */
apdu_close_reader (slot);
}
}
apdu_dev_list_finish (l);
}
app = app_top;
if (app)
npth_mutex_lock (&app_list_lock);
for (a = app_top; a; a = a->next)
{
lock_app (app, ctrl);
err = check_conflict (app, name);
lock_app (a, ctrl);
if (serialno_bin == NULL)
break;
if (a->serialnolen == serialno_bin_len
&& !memcmp (a->serialno, serialno_bin, a->serialnolen))
break;
unlock_app (a);
}
if (a)
{
err = check_conflict (a, name);
if (!err)
{
app->ref_count++;
*r_app = app;
a->ref_count++;
*r_app = a;
}
unlock_app (app);
unlock_app (a);
}
else
err = gpg_error (GPG_ERR_ENODEV);
npth_mutex_unlock (&app_list_lock);
return err;
}

84
scd/command.c
View File

@ -193,10 +193,8 @@ option_handler (assuan_context_t ctx, const char *key, const char *value)
/* If the card has not yet been opened, do it. */
static gpg_error_t
open_card (ctrl_t ctrl, const char *apptype, int scan)
open_card (ctrl_t ctrl)
{
gpg_error_t err;
/* If we ever got a card not present error code, return that. Only
the SERIALNO command and a reset are able to clear from that
state. */
@ -206,24 +204,46 @@ open_card (ctrl_t ctrl, const char *apptype, int scan)
if ( IS_LOCKED (ctrl) )
return gpg_error (GPG_ERR_LOCKED);
if (ctrl->app_ctx)
return 0;
return select_application (ctrl, NULL, &ctrl->app_ctx, 0, NULL, 0);
}
/* Explicitly open a card for a specific use of APPTYPE or SERIALNO. */
static gpg_error_t
open_card_with_request (ctrl_t ctrl, const char *apptype, const char *serialno)
{
gpg_error_t err;
unsigned char *serialno_bin = NULL;
size_t serialno_bin_len = 0;
/* If we are already initialized for one specific application we
need to check that the client didn't requested a specific
application different from the one in use before we continue. */
if (!scan && ctrl->app_ctx)
if (apptype && ctrl->app_ctx)
return check_application_conflict (apptype, ctrl->app_ctx);
err = select_application (ctrl, apptype, &ctrl->app_ctx, scan);
if (serialno)
serialno_bin = hex_to_buffer (serialno, &serialno_bin_len);
err = select_application (ctrl, apptype, &ctrl->app_ctx, 1,
serialno_bin, serialno_bin_len);
xfree (serialno_bin);
return err;
}
static const char hlp_serialno[] =
"SERIALNO [<apptype>]\n"
"SERIALNO [--demand=<serialno>] [<apptype>]\n"
"\n"
"Return the serial number of the card using a status response. This\n"
"function should be used to check for the presence of a card.\n"
"\n"
"If --demand is given, an application on the card with SERIALNO is\n"
"selected and an error is returned if no such card available.\n"
"\n"
"If APPTYPE is given, an application of that type is selected and an\n"
"error is returned if the application is not supported or available.\n"
"The default is to auto-select the application using a hardwired\n"
@ -245,17 +265,29 @@ cmd_serialno (assuan_context_t ctx, char *line)
int rc = 0;
char *serial;
time_t stamp;
const char *demand;
/* Clear the remove flag so that the open_card is able to reread it. */
if (ctrl->server_local->card_removed)
{
if ( IS_LOCKED (ctrl) )
return gpg_error (GPG_ERR_LOCKED);
ctrl->server_local->card_removed = 0;
if ((demand = has_option_name (line, "--demand")))
{
if (*demand != '=')
return set_error (GPG_ERR_ASS_PARAMETER, "missing value for option");
line = (char *)++demand;
for (; *line && !spacep (line); line++)
;
if (*line)
*line++ = 0;
}
else
demand = NULL;
if ((rc = open_card (ctrl, *line? line:NULL, 1)))
/* Clear the remove flag so that the open_card is able to reread it. */
if (ctrl->server_local->card_removed)
ctrl->server_local->card_removed = 0;
if ((rc = open_card_with_request (ctrl, *line? line:NULL, demand)))
{
ctrl->server_local->card_removed = 1;
return rc;
@ -357,7 +389,7 @@ cmd_learn (assuan_context_t ctx, char *line)
int rc = 0;
int only_keypairinfo = has_option (line, "--keypairinfo");
if ((rc = open_card (ctrl, NULL, 0)))
if ((rc = open_card (ctrl)))
return rc;
/* Unless the force option is used we try a shortcut by identifying
@ -440,7 +472,7 @@ cmd_readcert (assuan_context_t ctx, char *line)
unsigned char *cert;
size_t ncert;
if ((rc = open_card (ctrl, NULL, 0)))
if ((rc = open_card (ctrl)))
return rc;
line = xstrdup (line); /* Need a copy of the line. */
@ -482,7 +514,7 @@ cmd_readkey (assuan_context_t ctx, char *line)
unsigned char *pk;
size_t pklen;
if ((rc = open_card (ctrl, NULL, 0)))
if ((rc = open_card (ctrl)))
return rc;
if (has_option (line, "--advanced"))
@ -704,7 +736,7 @@ cmd_pksign (assuan_context_t ctx, char *line)
line = skip_options (line);
if ((rc = open_card (ctrl, NULL, 0)))
if ((rc = open_card (ctrl)))
return rc;
/* We have to use a copy of the key ID because the function may use
@ -748,7 +780,7 @@ cmd_pkauth (assuan_context_t ctx, char *line)
size_t outdatalen;
char *keyidstr;
if ((rc = open_card (ctrl, NULL, 0)))
if ((rc = open_card (ctrl)))
return rc;
if (!ctrl->app_ctx)
@ -793,7 +825,7 @@ cmd_pkdecrypt (assuan_context_t ctx, char *line)
char *keyidstr;
unsigned int infoflags;
if ((rc = open_card (ctrl, NULL, 0)))
if ((rc = open_card (ctrl)))
return rc;
keyidstr = xtrystrdup (line);
@ -846,7 +878,7 @@ cmd_getattr (assuan_context_t ctx, char *line)
int rc;
const char *keyword;
if ((rc = open_card (ctrl, NULL, 0)))
if ((rc = open_card (ctrl)))
return rc;
keyword = line;
@ -888,7 +920,7 @@ cmd_setattr (assuan_context_t ctx, char *orig_line)
size_t nbytes;
char *line, *linebuf;
if ((rc = open_card (ctrl, NULL, 0)))
if ((rc = open_card (ctrl)))
return rc;
/* We need to use a copy of LINE, because PIN_CB uses the same
@ -943,7 +975,7 @@ cmd_writecert (assuan_context_t ctx, char *line)
line++;
*line = 0;
if ((rc = open_card (ctrl, NULL, 0)))
if ((rc = open_card (ctrl)))
return rc;
if (!ctrl->app_ctx)
@ -1005,7 +1037,7 @@ cmd_writekey (assuan_context_t ctx, char *line)
line++;
*line = 0;
if ((rc = open_card (ctrl, NULL, 0)))
if ((rc = open_card (ctrl)))
return rc;
if (!ctrl->app_ctx)
@ -1092,7 +1124,7 @@ cmd_genkey (assuan_context_t ctx, char *line)
line++;
*line = 0;
if ((rc = open_card (ctrl, NULL, 0)))
if ((rc = open_card (ctrl)))
return rc;
if (!ctrl->app_ctx)
@ -1130,7 +1162,7 @@ cmd_random (assuan_context_t ctx, char *line)
"number of requested bytes missing");
nbytes = strtoul (line, NULL, 0);
if ((rc = open_card (ctrl, NULL, 0)))
if ((rc = open_card (ctrl)))
return rc;
if (!ctrl->app_ctx)
@ -1183,7 +1215,7 @@ cmd_passwd (assuan_context_t ctx, char *line)
line++;
*line = 0;
if ((rc = open_card (ctrl, NULL, 0)))
if ((rc = open_card (ctrl)))
return rc;
if (!ctrl->app_ctx)
@ -1240,7 +1272,7 @@ cmd_checkpin (assuan_context_t ctx, char *line)
int rc;
char *idstr;
if ((rc = open_card (ctrl, NULL, 0)))
if ((rc = open_card (ctrl)))
return rc;
if (!ctrl->app_ctx)
@ -1531,7 +1563,7 @@ cmd_apdu (assuan_context_t ctx, char *line)
line = skip_options (line);
if ((rc = open_card (ctrl, NULL, 0)))
if ((rc = open_card (ctrl)))
return rc;
app = ctrl->app_ctx;