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scd: Internal CCID reader cleanup.

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* scd/ccid-reader.c (scan_usb_device): Only for scan mode, so, rename
from scan_or_find_usb_device.
(scan_devices): Likewise.  Remove support of special transport types.
(ccid_get_reader_list): Simplify.
(abort_cmd): Fix error return.
(send_escape_cmd): Fix for RESULTLEN == NULL.
(ccid_transceive_secure): Remove unnecessary var updates.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
This commit is contained in:
NIIBE Yutaka 2017-04-07 13:30:35 +09:00
parent 3c93595d70
commit cc420d3488
1 changed files with 41 additions and 269 deletions
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310
scd/ccid-driver.c
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@ -1129,21 +1129,11 @@ find_endpoint (const struct libusb_interface_descriptor *ifcdesc, int mode)
}
/* Helper for scan_or_find_devices. This function returns true if a
/* Helper for scan_devices. This function returns true if a
requested device has been found or the caller should stop scanning
for other reasons. */
static int
scan_or_find_usb_device (int scan_mode,
int readerno, int *count, char **rid_list,
const char *readerid,
struct libusb_device *dev,
char **r_rid,
struct libusb_device_descriptor *desc,
libusb_device_handle **r_idev,
unsigned char **ifcdesc_extra,
size_t *ifcdesc_extra_len,
int *interface_number, int *setting_number,
int *ep_bulk_out, int *ep_bulk_in, int *ep_intr)
static void
scan_usb_device (int *count, char **rid_list, struct libusb_device *dev)
{
int ifc_no;
int set_no;
@ -1152,16 +1142,16 @@ scan_or_find_usb_device (int scan_mode,
libusb_device_handle *idev = NULL;
int err;
struct libusb_config_descriptor *config;
struct libusb_device_descriptor desc;
char *p;
err = libusb_get_device_descriptor (dev, desc);
err = libusb_get_device_descriptor (dev, &desc);
if (err)
return 0;
*r_idev = NULL;
return;
err = libusb_get_active_config_descriptor (dev, &config);
if (err)
return 0;
return;
for (ifc_no=0; ifc_no < config->bNumInterfaces; ifc_no++)
for (set_no=0; set_no < config->interface[ifc_no].num_altsetting; set_no++)
@ -1177,15 +1167,13 @@ scan_or_find_usb_device (int scan_mode,
&& ifcdesc->bInterfaceSubClass == 0
&& ifcdesc->bInterfaceProtocol == 0)
|| (ifcdesc->bInterfaceClass == 255
&& desc->idVendor == VENDOR_SCM
&& desc->idProduct == SCM_SPR532)
&& desc.idVendor == VENDOR_SCM
&& desc.idProduct == SCM_SPR532)
|| (ifcdesc->bInterfaceClass == 255
&& desc->idVendor == VENDOR_CHERRY
&& desc->idProduct == CHERRY_ST2000)))
&& desc.idVendor == VENDOR_CHERRY
&& desc.idProduct == CHERRY_ST2000)))
{
++*count;
if (!scan_mode && ((readerno > 0 && readerno != *count - 1)))
continue;
err = libusb_open (dev, &idev);
if (err)
@ -1194,89 +1182,36 @@ scan_or_find_usb_device (int scan_mode,
continue; /* with next setting. */
}
rid = make_reader_id (idev, desc->idVendor, desc->idProduct,
desc->iSerialNumber);
rid = make_reader_id (idev, desc.idVendor, desc.idProduct,
desc.iSerialNumber);
if (!rid)
{
libusb_free_config_descriptor (config);
return 0;
return;
}
if (!scan_mode && readerno == -1 && readerid
&& strncmp (rid, readerid, strlen (readerid)))
continue;
if (scan_mode)
/* We are collecting infos about all available CCID
readers. Store them and continue. */
DEBUGOUT_2 ("found CCID reader %d (ID=%s)\n", *count, rid);
p = malloc ((*rid_list? strlen (*rid_list):0) + 1
+ strlen (rid) + 1);
if (p)
{
char *p;
/* We are collecting infos about all
available CCID readers. Store them and
continue. */
DEBUGOUT_2 ("found CCID reader %d (ID=%s)\n", *count, rid);
p = malloc ((*rid_list? strlen (*rid_list):0) + 1
+ strlen (rid) + 1);
if (p)
*p = 0;
if (*rid_list)
{
*p = 0;
if (*rid_list)
{
strcat (p, *rid_list);
free (*rid_list);
}
strcat (p, rid);
strcat (p, "\n");
*rid_list = p;
}
else /* Out of memory. */
{
libusb_free_config_descriptor (config);
free (rid);
return 0;
strcat (p, *rid_list);
free (*rid_list);
}
strcat (p, rid);
strcat (p, "\n");
*rid_list = p;
}
else
else /* Out of memory. */
{
/* We found the requested reader. */
if (ifcdesc_extra && ifcdesc_extra_len)
{
*ifcdesc_extra = malloc (ifcdesc->extra_length);
if (!*ifcdesc_extra)
{
libusb_close (idev);
free (rid);
libusb_free_config_descriptor (config);
return 1; /* Out of core. */
}
memcpy (*ifcdesc_extra, ifcdesc->extra,
ifcdesc->extra_length);
*ifcdesc_extra_len = ifcdesc->extra_length;
}
if (interface_number)
*interface_number = ifc_no;
if (setting_number)
*setting_number = set_no;
if (ep_bulk_out)
*ep_bulk_out = find_endpoint (ifcdesc, 0);
if (ep_bulk_in)
*ep_bulk_in = find_endpoint (ifcdesc, 1);
if (ep_intr)
*ep_intr = find_endpoint (ifcdesc, 2);
if (r_rid)
{
*r_rid = rid;
rid = NULL;
}
else
free (rid);
*r_idev = idev;
libusb_free_config_descriptor (config);
return 1; /* Found requested device. */
free (rid);
return;
}
free (rid);
@ -1286,205 +1221,44 @@ scan_or_find_usb_device (int scan_mode,
}
libusb_free_config_descriptor (config);
return 0;
}
/* Combination function to either scan all CCID devices or to find and
open one specific device.
/* Scan all CCID devices.
The function returns 0 if a reader has been found or when a scan
returned without error.
With READERNO = -1 and READERID is NULL, scan mode is used and
R_RID should be the address where to store the list of reader_ids
we found. If on return this list is empty, no CCID device has been
found; otherwise it points to an allocated linked list of reader
IDs. Note that in this mode the function always returns NULL.
With READERNO >= 0 or READERID is not NULL find mode is used. This
uses the same algorithm as the scan mode but stops and returns at
the entry number READERNO and return the handle for the opened
USB device. If R_RID is not NULL it will receive the reader ID of
that device. If R_DEV is not NULL it will the device pointer of
that device. If IFCDESC_EXTRA is NOT NULL it will receive a
malloced copy of the interfaces "extra: data filed;
IFCDESC_EXTRA_LEN receive the length of this field. If there is
no reader with number READERNO or that reader is not usable by our
implementation NULL will be returned. The caller must close a
returned USB device handle and free (if not passed as NULL) the
returned reader ID info as well as the IFCDESC_EXTRA. On error
NULL will get stored at R_RID, R_DEV, IFCDESC_EXTRA and
IFCDESC_EXTRA_LEN. With READERID being -1 the function stops if
the READERID was found.
If R_FD is not -1 on return the device is not using USB for
transport but the device associated with that file descriptor. In
this case INTERFACE will receive the transport type and the other
USB specific return values are not used; the return value is
(void*)(1).
Note that the first entry of the returned reader ID list in scan mode
corresponds with a READERNO of 0 in find mode.
IDs.
*/
static int
scan_or_find_devices (int readerno, const char *readerid,
char **r_rid,
struct libusb_device_descriptor *r_desc,
unsigned char **ifcdesc_extra,
size_t *ifcdesc_extra_len,
int *interface_number, int *setting_number,
int *ep_bulk_out, int *ep_bulk_in, int *ep_intr,
libusb_device_handle **r_idev,
int *r_fd)
scan_devices (char **r_rid)
{
char *rid_list = NULL;
int count = 0;
libusb_device **dev_list = NULL;
libusb_device *dev;
libusb_device_handle *idev = NULL;
int scan_mode = (readerno == -1 && !readerid);
int i;
ssize_t n;
struct libusb_device_descriptor desc;
/* Set return values to a default. */
if (r_rid)
*r_rid = NULL;
if (ifcdesc_extra)
*ifcdesc_extra = NULL;
if (ifcdesc_extra_len)
*ifcdesc_extra_len = 0;
if (interface_number)
*interface_number = 0;
if (setting_number)
*setting_number = 0;
if (r_idev)
*r_idev = NULL;
if (r_fd)
*r_fd = -1;
/* See whether we want scan or find mode. */
if (scan_mode)
{
assert (r_rid);
}
n = libusb_get_device_list (NULL, &dev_list);
for (i = 0; i < n; i++)
{
dev = dev_list[i];
if (scan_or_find_usb_device (scan_mode, readerno, &count, &rid_list,
readerid,
dev,
r_rid,
&desc,
&idev,
ifcdesc_extra,
ifcdesc_extra_len,
interface_number, setting_number,
ep_bulk_out, ep_bulk_in, ep_intr))
{
libusb_free_device_list (dev_list, 1);
/* Found requested device or out of core. */
if (!idev)
{
free (rid_list);
return -1; /* error */
}
*r_idev = idev;
if (r_desc)
memcpy (r_desc, &desc, sizeof (struct libusb_device_descriptor));
return 0;
}
scan_usb_device (&count, &rid_list, dev);
}
libusb_free_device_list (dev_list, 1);
/* Now check whether there are any devices with special transport types. */
for (i=0; transports[i].name; i++)
{
int fd;
char *rid, *p;
fd = open (transports[i].name, O_RDWR);
if (fd == -1 && scan_mode && errno == EBUSY)
{
/* Ignore this error in scan mode because it indicates that
the device exists but is already open (most likely by us)
and thus in general suitable as a reader. */
}
else if (fd == -1)
{
DEBUGOUT_2 ("failed to open '%s': %s\n",
transports[i].name, strerror (errno));
continue;
}
rid = malloc (strlen (transports[i].name) + 30 + 10);
if (!rid)
{
if (fd != -1)
close (fd);
free (rid_list);
return -1; /* Error. */
}
sprintf (rid, "0000:%04X:%s:0", transports[i].type, transports[i].name);
if (scan_mode)
{
DEBUGOUT_2 ("found CCID reader %d (ID=%s)\n", count, rid);
p = malloc ((rid_list? strlen (rid_list):0) + 1 + strlen (rid) + 1);
if (!p)
{
if (fd != -1)
close (fd);
free (rid_list);
free (rid);
return -1; /* Error. */
}
*p = 0;
if (rid_list)
{
strcat (p, rid_list);
free (rid_list);
}
strcat (p, rid);
strcat (p, "\n");
rid_list = p;
++count;
}
else if (!readerno ||
(readerno < 0 && readerid && !strcmp (readerid, rid)))
{
/* Found requested device. */
if (interface_number)
*interface_number = transports[i].type;
if (r_rid)
*r_rid = rid;
else
free (rid);
if (r_fd)
*r_fd = fd;
return 0; /* Okay, found device */
}
else /* This is not yet the reader we want. */
{
if (readerno >= 0)
--readerno;
}
free (rid);
if (fd != -1)
close (fd);
}
if (scan_mode)
{
*r_rid = rid_list;
return 0;
}
else
return -1;
*r_rid = rid_list;
return 0;
}
@ -1517,8 +1291,7 @@ ccid_get_reader_list (void)
initialized_usb = 1;
}
if (scan_or_find_devices (-1, NULL, &reader_list, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL))
if (scan_devices (&reader_list))
return NULL; /* Error. */
return reader_list;
}
@ -2484,7 +2257,7 @@ abort_cmd (ccid_driver_t handle, int seqno)
if (!handle->idev)
{
/* I don't know how to send an abort to non-USB devices. */
rc = CCID_DRIVER_ERR_NOT_SUPPORTED;
return CCID_DRIVER_ERR_NOT_SUPPORTED;
}
seqno &= 0xff;
@ -2639,7 +2412,8 @@ send_escape_cmd (ccid_driver_t handle,
else
{
memcpy (result, msg, msglen);
*resultlen = msglen;
if (resultlen)
*resultlen = msglen;
rc = 0;
}
}
@ -4006,9 +3780,7 @@ ccid_transceive_secure (ccid_driver_t handle,
}
memcpy (resp, p, n);
resp += n;
*nresp += n;
maxresplen -= n;
}
if (!(tpdu[1] & 0x20))