depau
/
libfprint
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
libfprint/libfprint/drivers/upekts.c

823 lines
22 KiB
C
Raw Blame History

/*
* UPEK TouchStrip driver for libfprint
* Copyright (C) 2007 Daniel Drake <dsd@gentoo.org>
*
* Based in part on libthinkfinger:
* Copyright (C) 2006-2007 Timo Hoenig <thoenig@suse.de>
* Copyright (C) 2006 Pavel Machek <pavel@suse.cz>
*
* LGPL CRC code copied from GStreamer-0.10.10:
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) 2004,2006 Thomas Vander Stichele <thomas at apestaart dot org>
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; version
* 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#define FP_COMPONENT "upekts"
#include <errno.h>
#include <string.h>
#include <glib.h>
#include <usb.h>
#include <fp_internal.h>
#define EP_IN (1 | USB_ENDPOINT_IN)
#define EP_OUT (2 | USB_ENDPOINT_OUT)
#define TIMEOUT 5000
struct upekts_dev {
uint8_t seq;
};
static const uint16_t crc_table[256] = {
0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
};
static uint16_t udf_crc(unsigned char *buffer, size_t size)
{
uint16_t crc = 0;
while (size--)
crc = (uint16_t) ((crc << 8) ^
crc_table[((crc >> 8) & 0x00ff) ^ *buffer++]);
return crc;
}
/*
* MESSAGE FORMAT
*
* Messages to and from the device have the same format.
*
* Byte-wise:
* 'C' 'i' 'a' 'o' A B L <DATA> C1 C2
*
* Ciao prefixes all messages. The rightmost 4 bits of B become the uppermost
* 4 bits of L, and when combined with the lower 8 bits listed as 'L', L is
* the length of the data, <DATA> is L bytes long. C1 and C2 are the
* UDF-CRC16 for the whole message minus the Ciao prefix.
*
* When the device wants to command the driver to do something, it sends
* a message where B=0 and A!=0. The A value indicates the type of command.
* If the system is expected to respond to the command, it sends a message back
* with B=0 and A incremented.
*
* When the driver sends a command to the device, A=0 and B is used as a
* sequence counter. It starts at 0, increments by 0x10 on each command, and
* wraps around.
* After each command is sent, the device responds with another message
* indicating completion of the command including any data that was requested.
* This message has the same A and B values.
*
* When the driver is sending commands as above, and when the device is
* responding, the <DATA> seems to follow this structure:
*
* 28 L1 L2 0 0 S <INNERDATA>
*
* Where the length of <INNERDATA> is L-3, and S is some kind of subcommand
* code. L1 is the least significant bits of L, L2 is the most significant. In
* the device's response to a command, the subcommand code will be unchanged.
*
* After deducing and documenting the above, I found a few places where the
* above doesn't hold true. Those are marked with FIXME's below.
*/
#define CMD_SEQ_INCREMENT 0x10
static int send_cmd(struct fp_dev *dev, unsigned char seq_a,
unsigned char seq_b, unsigned char *data, uint16_t len)
{
int r;
uint16_t crc;
/* 9 bytes extra for: 4 byte 'Ciao', 1 byte A, 1 byte B | lenHI,
* 1 byte lenLO, 2 byte CRC */
size_t urblen = len + 9;
unsigned char *buf;
if (!data && len > 0) {
fp_err("len>0 but no data?");
return -EINVAL;
}
buf = g_malloc(urblen);
/* Write header */
strncpy(buf, "Ciao", 4);
len = GUINT16_TO_LE(len);
buf[4] = seq_a;
buf[5] = seq_b | ((len & 0xf00) >> 8);
buf[6] = len & 0x00ff;
/* Copy data */
if (data)
memcpy(buf + 7, data, len);
/* Append CRC */
crc = GUINT16_TO_BE(udf_crc(buf + 4, urblen - 6));
buf[urblen - 2] = crc >> 8;
buf[urblen - 1] = crc & 0xff;
r = usb_bulk_write(dev->udev, EP_OUT, buf, urblen, TIMEOUT);
g_free(buf);
if (r < 0) {
fp_err("cmd write failed, code %d", r);
return r;
} else if ((unsigned int) r < urblen) {
fp_err("cmd write too short (%d/%d)", r, urblen);
return -EIO;
}
return 0;
}
static int send_cmd28(struct fp_dev *dev, unsigned char subcmd,
unsigned char *data, uint16_t innerlen)
{
uint16_t _innerlen = innerlen;
size_t len = innerlen + 6;
unsigned char *buf = g_malloc0(len);
struct upekts_dev *upekdev = dev->priv;
uint8_t seq = upekdev->seq + CMD_SEQ_INCREMENT;
int r;
fp_dbg("seq=%02x subcmd=%02x with %d bytes of data", seq, subcmd, innerlen);
_innerlen = GUINT16_TO_LE(innerlen + 3);
buf[0] = 0x28;
buf[1] = _innerlen & 0x00ff;
buf[2] = (_innerlen & 0xff00) >> 8;
buf[5] = subcmd;
memcpy(buf + 6, data, innerlen);
r = send_cmd(dev, 0, seq, buf, len);
if (r == 0)
upekdev->seq = seq;
g_free(buf);
return r;
}
static int send_cmdresponse(struct fp_dev *dev, unsigned char seq,
unsigned char *data, uint8_t len)
{
fp_dbg("seq=%02x len=%d", seq, len);
return send_cmd(dev, seq, 0, data, len);
}
static unsigned char *__read_msg(struct fp_dev *dev, size_t *data_len)
{
#define MSG_READ_BUF_SIZE 0x40
#define MAX_DATA_IN_READ_BUF (MSG_READ_BUF_SIZE - 9)
unsigned char *buf = g_malloc(MSG_READ_BUF_SIZE);
size_t buf_size = MSG_READ_BUF_SIZE;
uint16_t computed_crc, msg_crc;
uint16_t len;
int r;
r = usb_bulk_read(dev->udev, EP_IN, buf, buf_size, TIMEOUT);
if (r < 0) {
fp_err("msg read failed, code %d", r);
goto err;
} else if (r < 9) {
fp_err("msg read too short (%d/%d)", r, buf_size);
goto err;
}
if (strncmp(buf, "Ciao", 4) != 0) {
fp_err("no Ciao for you!!");
goto err;
}
len = GUINT16_FROM_LE(((buf[5] & 0xf) << 8) | buf[6]);
if (r != MSG_READ_BUF_SIZE && (len + 9) < r) {
/* Check that the length claimed inside the message is in line with
* the amount of data that was transferred over USB. */
fp_err("msg didn't include enough data, expected=%d recv=%d",
len + 9, r);
goto err;
}
/* We use a 64 byte buffer for reading messages. However, sometimes
* messages are longer, in which case we have to do another USB bulk read
* to read the remainder. This is handled below. */
if (len > MAX_DATA_IN_READ_BUF) {
int needed = len - MAX_DATA_IN_READ_BUF;
fp_dbg("didn't fit in buffer, need to extend by %d bytes", needed);
buf = g_realloc((gpointer) buf, MSG_READ_BUF_SIZE + needed);
r = usb_bulk_read(dev->udev, EP_IN, buf + MSG_READ_BUF_SIZE, needed,
TIMEOUT);
if (r < 0) {
fp_err("extended msg read failed, code %d", r);
goto err;
} else if (r < needed) {
fp_err("extended msg short read (%d/%d)", r, needed);
goto err;
}
buf_size += needed;
}
computed_crc = udf_crc(buf + 4, len + 3);
msg_crc = GUINT16_FROM_LE((buf[len + 8] << 8) | buf[len + 7]);
if (computed_crc != msg_crc) {
fp_err("CRC failed, got %04x expected %04x", msg_crc, computed_crc);
goto err;
}
*data_len = buf_size;
return buf;
err:
g_free(buf);
return NULL;
}
enum read_msg_status {
READ_MSG_ERROR = -1,
READ_MSG_CMD = 1,
READ_MSG_RESPONSE = 2,
};
static enum read_msg_status read_msg(struct fp_dev *dev, uint8_t *seq,
unsigned char *subcmd, unsigned char **data, size_t *data_len)
{
#define MSG_READ_BUF_SIZE 0x40
#define MAX_DATA_IN_READ_BUF (MSG_READ_BUF_SIZE - 9)
unsigned char *buf;
size_t buf_size;
unsigned char code_a;
unsigned char code_b;
uint16_t len;
enum read_msg_status ret = READ_MSG_ERROR;
retry:
buf = __read_msg(dev, &buf_size);
if (!buf)
return READ_MSG_ERROR;
code_a = buf[4];
code_b = buf[5] & 0xf0;
len = GUINT16_FROM_LE(((buf[5] & 0xf) << 8) | buf[6]);
fp_dbg("A=%02x B=%02x len=%d", code_a, code_b, len);
if (code_a && !code_b) {
/* device sends command to driver */
fp_dbg("cmd %x from device to driver", code_a);
if (code_a == 0x08) {
fp_dbg("device busy, send busy-ack");
send_cmdresponse(dev, 0x09, NULL, 0);
g_free(buf);
goto retry;
}
if (seq)
*seq = code_a;
if (data) {
if (len > 0) {
unsigned char *tmp = g_malloc(len);
memcpy(tmp, buf + 7, len);
*data = tmp;
}
*data_len = len;
}
ret = READ_MSG_CMD;
} else if (!code_a) {
/* device sends response to a previously executed command */
unsigned char *innerbuf = buf + 7;
unsigned char _subcmd;
uint16_t innerlen;
if (len < 6) {
fp_err("cmd response too short (%d)", len);
goto out;
}
if (innerbuf[0] != 0x28) {
fp_err("cmd response without 28 byte?");
goto out;
}
if (innerbuf[3] || innerbuf[4]) {
fp_err("non-zero bytes in cmd response");
goto out;
}
innerlen = innerbuf[1] | (innerbuf[2] << 8);
innerlen = GUINT16_FROM_LE(innerlen) - 3;
_subcmd = innerbuf[5];
fp_dbg("device responds to subcmd %x with %d bytes", _subcmd, innerlen);
if (seq)
*seq = code_b;
if (subcmd)
*subcmd = _subcmd;
if (data) {
if (innerlen > 0) {
unsigned char *tmp = g_malloc(innerlen);
memcpy(tmp, innerbuf + 6, innerlen);
*data = tmp;
}
*data_len = innerlen;
}
ret = READ_MSG_RESPONSE;
} else {
fp_err("don't know how to handle this message");
}
out:
g_free(buf);
return ret;
}
static int read_msg28(struct fp_dev *dev, unsigned char subcmd,
unsigned char **data, size_t *data_len)
{
struct upekts_dev *upekdev = dev->priv;
uint8_t _seq;
unsigned char _subcmd;
enum read_msg_status msgstat;
msgstat = read_msg(dev, &_seq, &_subcmd, data, data_len);
if (msgstat != READ_MSG_RESPONSE) {
fp_err("expected response, got %d seq=%x", msgstat, _seq);
return -EPROTO;
}
if (_subcmd != subcmd) {
fp_warn("expected response to subcmd %02x, got response to %02x",
subcmd, _subcmd);
return -EPROTO;
}
if (_seq != upekdev->seq) {
fp_err("expected response to cmd seq=%02x, got response to %02x",
upekdev->seq, _seq);
return -EPROTO;
}
return 0;
}
static const unsigned char init_resp03[] = {
0x01, 0x00, 0xe8, 0x03, 0x00, 0x00, 0xff, 0x07
};
static const unsigned char init28_08[] = {
0x04, 0x83, 0x00, 0x2c, 0x22, 0x23, 0x97, 0xc9, 0xa7, 0x15, 0xa0, 0x8a,
0xab, 0x3c, 0xd0, 0xbf, 0xdb, 0xf3, 0x92, 0x6f, 0xae, 0x3b, 0x1e, 0x44,
0xc4
};
static const unsigned char init28_0c[] = {
0x04, 0x03, 0x00, 0x00, 0x00
};
static const unsigned char init28_0b[] = {
0x04, 0x03, 0x00, 0x00, 0x00, 0x60, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00,
0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0xf4, 0x01, 0x00, 0x00, 0x64, 0x01, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00,
0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0a, 0x00, 0x0a,
0x00, 0x64, 0x00, 0xf4, 0x01, 0x32, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x00
};
static int do_init(struct fp_dev *dev)
{
enum read_msg_status msgstat;
unsigned char dummy = 0x10;
uint8_t seq;
int r;
r = usb_control_msg(dev->udev, USB_TYPE_VENDOR | USB_RECIP_DEVICE,
0x0c, 0x100, 0x400, &dummy, sizeof(dummy), TIMEOUT);
if (r < 0) {
fp_dbg("control write failed\n");
return r;
}
msgstat = read_msg(dev, &seq, NULL, NULL, NULL);
if (msgstat != READ_MSG_CMD) {
fp_err("expected command, got %d seq=%x", msgstat, seq);
return -EPROTO;
}
if (seq != 3) {
fp_err("expected seq=3, got %x", seq);
return -EPROTO;
}
r = send_cmdresponse(dev, ++seq, (unsigned char *) init_resp03,
sizeof(init_resp03));
if (r < 0)
return r;
msgstat = read_msg(dev, &seq, NULL, NULL, NULL);
if (msgstat != READ_MSG_CMD) {
fp_err("expected command, got %d seq=%x", msgstat, seq);
return -EPROTO;
}
if (seq != 5) {
fp_err("expected seq=5, got %x", seq);
return -EPROTO;
}
dummy = 0x04;
r = send_cmd28(dev, 0x06, &dummy, 1);
if (r < 0)
return r;
if (read_msg28(dev, 0x06, NULL, NULL) < 0)
return r;
dummy = 0x04;
r = send_cmd28(dev, 0x07, &dummy, 1);
if (r < 0)
return r;
if (read_msg28(dev, 0x07, NULL, NULL) < 0)
return r;
r = send_cmd28(dev, 0x08, (unsigned char *) init28_08,
sizeof(init28_08));
if (r < 0)
return r;
if (read_msg28(dev, 0x08, NULL, NULL) < 0)
return r;
r = send_cmd28(dev, 0x0c, (unsigned char *) init28_0c,
sizeof(init28_0c));
if (r < 0)
return r;
if (read_msg28(dev, 0x0c, NULL, NULL) < 0)
return r;
r = send_cmd28(dev, 0x0b, (unsigned char *) init28_0b,
sizeof(init28_0b));
if (r < 0)
return r;
if (read_msg28(dev, 0x0b, NULL, NULL) < 0)
return r;
return 0;
}
static int do_deinit(struct fp_dev *dev)
{
unsigned char dummy = 0;
enum read_msg_status msgstat;
uint8_t seq;
int r;
/* FIXME: either i've misunderstood the message system or this is illegal
* here, since we arent responding to anything. */
r = send_cmdresponse(dev, 0x07, &dummy, 1);
if (r < 0)
return r;
msgstat = read_msg(dev, &seq, NULL, NULL, NULL);
if (msgstat != READ_MSG_CMD) {
fp_err("expected command, got %d seq=%x", msgstat, seq);
return -EPROTO;
}
if (seq != 1) {
fp_err("expected seq=1, got %x", seq);
return -EPROTO;
}
return 0;
}
static int dev_init(struct fp_dev *dev, unsigned long driver_data)
{
struct upekts_dev *upekdev = NULL;
int r;
r = usb_claim_interface(dev->udev, 0);
if (r < 0)
return r;
upekdev = g_malloc(sizeof(*upekdev));
upekdev->seq = 0xf0; /* incremented to 0x00 before first cmd */
dev->priv = upekdev;
dev->nr_enroll_stages = 3;
return 0;
}
static void dev_exit(struct fp_dev *dev)
{
usb_release_interface(dev->udev, 0);
g_free(dev->priv);
}
static const unsigned char enroll_init[] = {
0x02, 0xc0, 0xd4, 0x01, 0x00, 0x04, 0x00, 0x08
};
static const unsigned char scan_comp[] = {
0x12, 0xff, 0xff, 0xff, 0xff /* scan completion, prefixes print data */
};
/* used for enrollment and verification */
static const unsigned char poll_data[] = { 0x30, 0x01 };
static int enroll(struct fp_dev *dev, gboolean initial,
int stage, struct fp_print_data **_data)
{
unsigned char *data;
size_t data_len;
int r;
int result = 0;
int passed = 0;
if (initial) {
r = do_init(dev);
if (r < 0)
return r;
r = send_cmd28(dev, 0x02, (unsigned char *) enroll_init,
sizeof(enroll_init));
if (r < 0)
return r;
/* FIXME: protocol misunderstanding here. device receives response
* to subcmd 0 after submitting subcmd 2? */
/* actually this is probably a poll response? does the above cmd
* include a 30 01 poll somewhere? */
if (read_msg28(dev, 0x00, NULL, NULL) < 0)
return -EPROTO;
}
while (!result) {
unsigned char status;
r = send_cmd28(dev, 0x00, (unsigned char *) poll_data,
sizeof(poll_data));
if (r < 0)
return r;
if (read_msg28(dev, 0x00, &data, &data_len) < 0)
return -EPROTO;
if (data_len != 14) {
fp_err("received 3001 poll response of %d bytes?", data_len);
g_free(data);
return -EPROTO;
}
status = data[5];
fp_dbg("poll result = %02x", status);
/* These codes indicate that we're waiting for a finger scan, so poll
* again */
switch (status) {
case 0x0c:
case 0x0d:
case 0x0e:
/* no news, poll again */
if (passed)
result = FP_ENROLL_PASS;
break;
case 0x1c: /* FIXME what does this one mean? */
case 0x0b: /* FIXME what does this one mean? */
case 0x23: /* FIXME what does this one mean? */
result = FP_ENROLL_RETRY;
break;
case 0x0f: /* scan taking too long, remove finger and try again */
result = FP_ENROLL_RETRY_REMOVE_FINGER;
break;
case 0x1e: /* swipe too short */
result = FP_ENROLL_RETRY_TOO_SHORT;
break;
case 0x24: /* finger not centered */
result = FP_ENROLL_RETRY_CENTER_FINGER;
break;
case 0x20:
/* finger scanned successfully */
/* don't break out immediately, need to look at the next
* value to determine if enrollment is complete or not */
passed = 1;
break;
case 0x00:
if (passed)
result = FP_ENROLL_COMPLETE;
break;
default:
fp_err("unrecognised scan status code %02x", status);
result = -EPROTO;
break;
}
g_free(data);
}
/* FIXME: need to extend protocol research to handle the case when
* enrolment fails, e.g. you scan a different finger on each stage */
if (result == FP_ENROLL_COMPLETE) {
struct fp_print_data *fdata;
r = send_cmd28(dev, 0x00, (unsigned char *) poll_data,
sizeof(poll_data));
if (r < 0)
return r;
/* FIXME: protocol misunderstanding here. device receives response
* to subcmd 0 after submitting subcmd 2? */
if (read_msg28(dev, 0x02, &data, &data_len) < 0)
return -EPROTO;
if (data_len < sizeof(scan_comp)) {
fp_err("fingerprint data too short (%d bytes)", data_len);
result = -EPROTO;
goto comp_out;
}
if (memcmp(data, scan_comp, sizeof(scan_comp)) != 0) {
fp_err("unrecognised data prefix %x %x %x %x %x",
data[0], data[1], data[2], data[3], data[4]);
result = -EPROTO;
goto comp_out;
}
if (!_data) {
fp_err("complete but no data storage!");
result = FP_ENROLL_COMPLETE;
goto comp_out;
}
fdata = fpi_print_data_new(dev, data_len - sizeof(scan_comp));
memcpy(fdata->data, data + sizeof(scan_comp), data_len - sizeof(scan_comp));
*_data = fdata;
comp_out:
do_deinit(dev);
g_free(data);
}
return result;
}
static const unsigned char verify_hdr[] = {
0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0xc0, 0xd4, 0x01, 0x00, 0x20, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00,
0x00
};
static int verify(struct fp_dev *dev, struct fp_print_data *print)
{
size_t data_len = sizeof(verify_hdr) + print->length;
unsigned char *data;
int r;
unsigned char status;
gboolean need_poll = FALSE;
gboolean done = FALSE;
r = do_init(dev);
if (r < 0)
return r;
data = g_malloc(data_len);
memcpy(data, verify_hdr, sizeof(verify_hdr));
memcpy(data + sizeof(verify_hdr), print->data, print->length);
r = send_cmd28(dev, 0x03, data, data_len);
if (r < 0)
return r;
g_free(data);
while (!done) {
if (need_poll) {
r = send_cmd28(dev, 0x00, (unsigned char *) poll_data,
sizeof(poll_data));
if (r < 0)
return r;
} else {
need_poll = TRUE;
}
if (read_msg28(dev, 0x00, &data, &data_len) < 0)
return -EPROTO;
if (data_len != 14) {
fp_err("received 3001 poll response of %d bytes?", data_len);
r = -EPROTO;
goto out;
}
status = data[5];
fp_dbg("poll result = %02x", status);
/* These codes indicate that we're waiting for a finger scan, so poll
* again */
switch (status) {
case 0x0c: /* no news, poll again */
break;
case 0x20:
fp_dbg("processing scan for verification");
break;
case 0x00:
fp_dbg("good image");
done = TRUE;
break;
case 0x1c: /* FIXME what does this one mean? */
case 0x0b: /* FIXME what does this one mean? */
case 0x23: /* FIXME what does this one mean? */
r = FP_VERIFY_RETRY;
goto out;
case 0x0f: /* scan taking too long, remove finger and try again */
r = FP_VERIFY_RETRY_REMOVE_FINGER;
goto out;
case 0x1e: /* swipe too short */
r = FP_VERIFY_RETRY_TOO_SHORT;
goto out;
case 0x24: /* finger not centered */
r = FP_VERIFY_RETRY_CENTER_FINGER;
goto out;
default:
fp_err("unrecognised verify status code %02x", status);
r = -EPROTO;
goto out;
}
g_free(data);
}
if (status == 0x00) {
/* poll again for verify result */
r = send_cmd28(dev, 0x00, (unsigned char *) poll_data,
sizeof(poll_data));
if (r < 0)
return r;
if (read_msg28(dev, 0x03, &data, &data_len) < 0)
return -EPROTO;
if (data_len < 2) {
fp_err("verify result abnormally short!");
r = -EPROTO;
goto out;
}
if (data[0] != 0x12) {
fp_err("unexpected verify header byte %02x", data[0]);
r = -EPROTO;
goto out;
}
if (data[1] == 0x00) {
r = FP_VERIFY_NO_MATCH;
} else if (data[1] == 0x01) {
r = FP_VERIFY_MATCH;
} else {
fp_err("unrecognised verify result %02x", data[1]);
r = -EPROTO;
goto out;
}
}
out:
do_deinit(dev);
g_free(data);
return r;
}
static const struct usb_id id_table[] = {
{ .vendor = 0x0483, .product = 0x2016 },
{ 0, 0, 0, }, /* terminating entry */
};
struct fp_driver upekts_driver = {
.id = 1,
.name = FP_COMPONENT,
.full_name = "UPEK TouchStrip",
.id_table = id_table,
.init = dev_init,
.exit = dev_exit,
.enroll = enroll,
.verify = verify,
};
Reference in New Issue View Git Blame Copy Permalink