/libfido2/src/nfc_linux.c
Line | Count | Source (jump to first uncovered line) |
1 | | /* |
2 | | * Copyright (c) 2020 Yubico AB. All rights reserved. |
3 | | * Use of this source code is governed by a BSD-style |
4 | | * license that can be found in the LICENSE file. |
5 | | */ |
6 | | |
7 | | #include <sys/types.h> |
8 | | #include <sys/uio.h> |
9 | | #include <sys/socket.h> |
10 | | |
11 | | #include <linux/nfc.h> |
12 | | |
13 | | #include <errno.h> |
14 | | #include <libudev.h> |
15 | | #include <signal.h> |
16 | | #include <unistd.h> |
17 | | |
18 | | #include "fido.h" |
19 | | #include "fido/param.h" |
20 | | #include "netlink.h" |
21 | | #include "iso7816.h" |
22 | | |
23 | 1.39k | #define TX_CHUNK_SIZE 240 |
24 | | |
25 | | static const uint8_t aid[] = { 0xa0, 0x00, 0x00, 0x06, 0x47, 0x2f, 0x00, 0x01 }; |
26 | | static const uint8_t v_u2f[] = { 'U', '2', 'F', '_', 'V', '2' }; |
27 | | static const uint8_t v_fido[] = { 'F', 'I', 'D', 'O', '_', '2', '_', '0' }; |
28 | | |
29 | | struct nfc_linux { |
30 | | int fd; |
31 | | uint32_t dev; |
32 | | uint32_t target; |
33 | | sigset_t sigmask; |
34 | | const sigset_t *sigmaskp; |
35 | | struct fido_nl *nl; |
36 | | }; |
37 | | |
38 | | static int |
39 | | tx_short_apdu(fido_dev_t *d, const iso7816_header_t *h, const uint8_t *payload, |
40 | | uint8_t payload_len, uint8_t cla_flags) |
41 | 1.30k | { |
42 | 1.30k | uint8_t apdu[5 + UINT8_MAX + 1]; |
43 | 1.30k | uint8_t sw[2]; |
44 | 1.30k | size_t apdu_len; |
45 | 1.30k | int ok = -1; |
46 | 1.30k | |
47 | 1.30k | memset(&apdu, 0, sizeof(apdu)); |
48 | 1.30k | apdu[0] = h->cla | cla_flags; |
49 | 1.30k | apdu[1] = h->ins; |
50 | 1.30k | apdu[2] = h->p1; |
51 | 1.30k | apdu[3] = h->p2; |
52 | 1.30k | apdu[4] = payload_len; |
53 | 1.30k | memcpy(&apdu[5], payload, payload_len); |
54 | 1.30k | apdu_len = (size_t)(5 + payload_len + 1); |
55 | 1.30k | |
56 | 1.30k | if (d->io.write(d->io_handle, apdu, apdu_len) < 0) { |
57 | 20 | fido_log_debug("%s: write", __func__); |
58 | 20 | goto fail; |
59 | 20 | } |
60 | 1.28k | |
61 | 1.28k | if (cla_flags & 0x10) { |
62 | 86 | if (d->io.read(d->io_handle, sw, sizeof(sw), -1) != 2) { |
63 | 4 | fido_log_debug("%s: read", __func__); |
64 | 4 | goto fail; |
65 | 4 | } |
66 | 82 | if ((sw[0] << 8 | sw[1]) != SW_NO_ERROR) { |
67 | 77 | fido_log_debug("%s: unexpected sw", __func__); |
68 | 77 | goto fail; |
69 | 77 | } |
70 | 1.20k | } |
71 | 1.20k | |
72 | 1.20k | ok = 0; |
73 | 1.30k | fail: |
74 | 1.30k | explicit_bzero(apdu, sizeof(apdu)); |
75 | 1.30k | |
76 | 1.30k | return (ok); |
77 | 1.20k | } |
78 | | |
79 | | static int |
80 | | nfc_do_tx(fido_dev_t *d, const uint8_t *apdu_ptr, size_t apdu_len) |
81 | 1.29k | { |
82 | 1.29k | iso7816_header_t h; |
83 | 1.29k | |
84 | 1.29k | if (fido_buf_read(&apdu_ptr, &apdu_len, &h, sizeof(h)) < 0) { |
85 | 0 | fido_log_debug("%s: header", __func__); |
86 | 0 | return (-1); |
87 | 0 | } |
88 | 1.29k | if (apdu_len < 2) { |
89 | 0 | fido_log_debug("%s: apdu_len %zu", __func__, apdu_len); |
90 | 0 | return (-1); |
91 | 0 | } |
92 | 1.29k | |
93 | 1.29k | apdu_len -= 2; /* trim le1 le2 */ |
94 | 1.29k | |
95 | 1.30k | while (apdu_len > TX_CHUNK_SIZE) { |
96 | 86 | if (tx_short_apdu(d, &h, apdu_ptr, TX_CHUNK_SIZE, 0x10) < 0) { |
97 | 81 | fido_log_debug("%s: chain", __func__); |
98 | 81 | return (-1); |
99 | 81 | } |
100 | 5 | apdu_ptr += TX_CHUNK_SIZE; |
101 | 5 | apdu_len -= TX_CHUNK_SIZE; |
102 | 5 | } |
103 | 1.29k | |
104 | 1.29k | if (tx_short_apdu(d, &h, apdu_ptr, (uint8_t)apdu_len, 0) < 0) { |
105 | 20 | fido_log_debug("%s: tx_short_apdu", __func__); |
106 | 20 | return (-1); |
107 | 20 | } |
108 | 1.19k | |
109 | 1.19k | return (0); |
110 | 1.19k | } |
111 | | |
112 | | int |
113 | | fido_nfc_tx(fido_dev_t *d, uint8_t cmd, const unsigned char *buf, size_t count) |
114 | 1.36k | { |
115 | 1.36k | iso7816_apdu_t *apdu = NULL; |
116 | 1.36k | const uint8_t *ptr; |
117 | 1.36k | size_t len; |
118 | 1.36k | int ok = -1; |
119 | 1.36k | |
120 | 1.36k | switch (cmd) { |
121 | 622 | case CTAP_CMD_INIT: /* select */ |
122 | 622 | if ((apdu = iso7816_new(0, 0xa4, 0x04, sizeof(aid))) == NULL || |
123 | 622 | iso7816_add(apdu, aid, sizeof(aid)) < 0) { |
124 | 4 | fido_log_debug("%s: iso7816", __func__); |
125 | 4 | goto fail; |
126 | 4 | } |
127 | 618 | break; |
128 | 618 | case CTAP_CMD_CBOR: /* wrap cbor */ |
129 | 456 | if (count > UINT16_MAX || (apdu = iso7816_new(0x80, 0x10, 0x80, |
130 | 453 | (uint16_t)count)) == NULL || |
131 | 456 | iso7816_add(apdu, buf, count) < 0) { |
132 | 17 | fido_log_debug("%s: iso7816", __func__); |
133 | 17 | goto fail; |
134 | 17 | } |
135 | 439 | break; |
136 | 439 | case CTAP_CMD_MSG: /* already an apdu */ |
137 | 241 | break; |
138 | 439 | default: |
139 | 49 | fido_log_debug("%s: cmd=%02x", __func__, cmd); |
140 | 49 | goto fail; |
141 | 1.29k | } |
142 | 1.29k | |
143 | 1.29k | if (apdu != NULL) { |
144 | 1.05k | ptr = iso7816_ptr(apdu); |
145 | 1.05k | len = iso7816_len(apdu); |
146 | 1.05k | } else { |
147 | 241 | ptr = buf; |
148 | 241 | len = count; |
149 | 241 | } |
150 | 1.29k | |
151 | 1.29k | if (nfc_do_tx(d, ptr, len) < 0) { |
152 | 101 | fido_log_debug("%s: nfc_do_tx", __func__); |
153 | 101 | goto fail; |
154 | 101 | } |
155 | 1.19k | |
156 | 1.19k | ok = 0; |
157 | 1.36k | fail: |
158 | 1.36k | iso7816_free(&apdu); |
159 | 1.36k | |
160 | 1.36k | return (ok); |
161 | 1.19k | } |
162 | | |
163 | | static int |
164 | | rx_init(fido_dev_t *d, unsigned char *buf, size_t count, int ms) |
165 | 612 | { |
166 | 612 | fido_ctap_info_t *attr = (fido_ctap_info_t *)buf; |
167 | 612 | uint8_t f[64]; |
168 | 612 | int n; |
169 | 612 | |
170 | 612 | if (count != sizeof(*attr)) { |
171 | 0 | fido_log_debug("%s: count=%zu", __func__, count); |
172 | 0 | return (-1); |
173 | 0 | } |
174 | 612 | |
175 | 612 | memset(attr, 0, sizeof(*attr)); |
176 | 612 | |
177 | 612 | if ((n = d->io.read(d->io_handle, f, sizeof(f), ms)) < 2 || |
178 | 612 | (f[n - 2] << 8 | f[n - 1]) != SW_NO_ERROR) { |
179 | 199 | fido_log_debug("%s: read", __func__); |
180 | 199 | return (-1); |
181 | 199 | } |
182 | 413 | |
183 | 413 | n -= 2; |
184 | 413 | |
185 | 413 | if (n == sizeof(v_u2f) && memcmp(f, v_u2f, sizeof(v_u2f)) == 0) |
186 | 0 | attr->flags = FIDO_CAP_CBOR; |
187 | 413 | else if (n == sizeof(v_fido) && memcmp(f, v_fido, sizeof(v_fido)) == 0) |
188 | 0 | attr->flags = FIDO_CAP_CBOR | FIDO_CAP_NMSG; |
189 | 413 | else { |
190 | 413 | fido_log_debug("%s: unknown version string", __func__); |
191 | 413 | #ifdef FIDO_FUZZ |
192 | 413 | attr->flags = FIDO_CAP_CBOR | FIDO_CAP_NMSG; |
193 | | #else |
194 | | return (-1); |
195 | | #endif |
196 | 413 | } |
197 | 413 | |
198 | 413 | memcpy(&attr->nonce, &d->nonce, sizeof(attr->nonce)); /* XXX */ |
199 | 413 | |
200 | 413 | return ((int)count); |
201 | 413 | } |
202 | | |
203 | | static int |
204 | | tx_get_response(fido_dev_t *d, uint8_t count) |
205 | 18 | { |
206 | 18 | uint8_t apdu[5]; |
207 | 18 | |
208 | 18 | memset(apdu, 0, sizeof(apdu)); |
209 | 18 | apdu[1] = 0xc0; /* GET_RESPONSE */ |
210 | 18 | apdu[4] = count; |
211 | 18 | |
212 | 18 | if (d->io.write(d->io_handle, apdu, sizeof(apdu)) < 0) { |
213 | 5 | fido_log_debug("%s: write", __func__); |
214 | 5 | return (-1); |
215 | 5 | } |
216 | 13 | |
217 | 13 | return (0); |
218 | 13 | } |
219 | | |
220 | | static int |
221 | | rx_apdu(fido_dev_t *d, uint8_t sw[2], unsigned char **buf, size_t *count, int ms) |
222 | 593 | { |
223 | 593 | uint8_t f[256 + 2]; |
224 | 593 | int n, ok = -1; |
225 | 593 | |
226 | 593 | if ((n = d->io.read(d->io_handle, f, sizeof(f), ms)) < 2) { |
227 | 291 | fido_log_debug("%s: read", __func__); |
228 | 291 | goto fail; |
229 | 291 | } |
230 | 302 | |
231 | 302 | if (fido_buf_write(buf, count, f, (size_t)(n - 2)) < 0) { |
232 | 0 | fido_log_debug("%s: fido_buf_write", __func__); |
233 | 0 | goto fail; |
234 | 0 | } |
235 | 302 | |
236 | 302 | memcpy(sw, f + n - 2, 2); |
237 | 302 | |
238 | 302 | ok = 0; |
239 | 593 | fail: |
240 | 593 | explicit_bzero(f, sizeof(f)); |
241 | 593 | |
242 | 593 | return (ok); |
243 | 302 | } |
244 | | |
245 | | static int |
246 | | rx_msg(fido_dev_t *d, unsigned char *buf, size_t count, int ms) |
247 | 580 | { |
248 | 580 | uint8_t sw[2]; |
249 | 580 | const size_t bufsiz = count; |
250 | 580 | |
251 | 580 | if (rx_apdu(d, sw, &buf, &count, ms) < 0) { |
252 | 289 | fido_log_debug("%s: preamble", __func__); |
253 | 289 | return (-1); |
254 | 289 | } |
255 | 291 | |
256 | 302 | while (sw[0] == SW1_MORE_DATA) |
257 | 291 | if (tx_get_response(d, sw[1]) < 0 || |
258 | 18 | rx_apdu(d, sw, &buf, &count, ms) < 0) { |
259 | 7 | fido_log_debug("%s: chain", __func__); |
260 | 7 | return (-1); |
261 | 7 | } |
262 | 291 | |
263 | 291 | if (fido_buf_write(&buf, &count, sw, sizeof(sw)) < 0) { |
264 | 0 | fido_log_debug("%s: sw", __func__); |
265 | 0 | return (-1); |
266 | 0 | } |
267 | 284 | |
268 | 284 | if (bufsiz - count > INT_MAX) { |
269 | 0 | fido_log_debug("%s: bufsiz", __func__); |
270 | 0 | return (-1); |
271 | 0 | } |
272 | 284 | |
273 | 284 | return ((int)(bufsiz - count)); |
274 | 284 | } |
275 | | |
276 | | static int |
277 | | rx_cbor(fido_dev_t *d, unsigned char *buf, size_t count, int ms) |
278 | 385 | { |
279 | 385 | int r; |
280 | 385 | |
281 | 385 | if ((r = rx_msg(d, buf, count, ms)) < 2) |
282 | 171 | return (-1); |
283 | 214 | |
284 | 214 | return (r - 2); |
285 | 214 | } |
286 | | |
287 | | int |
288 | | fido_nfc_rx(fido_dev_t *d, uint8_t cmd, unsigned char *buf, size_t count, int ms) |
289 | 1.19k | { |
290 | 1.19k | switch (cmd) { |
291 | 612 | case CTAP_CMD_INIT: |
292 | 612 | return (rx_init(d, buf, count, ms)); |
293 | 385 | case CTAP_CMD_CBOR: |
294 | 385 | return (rx_cbor(d, buf, count, ms)); |
295 | 195 | case CTAP_CMD_MSG: |
296 | 195 | return (rx_msg(d, buf, count, ms)); |
297 | 0 | default: |
298 | 0 | fido_log_debug("%s: cmd=%02x", __func__, cmd); |
299 | 0 | return (-1); |
300 | 1.19k | } |
301 | 1.19k | } |
302 | | |
303 | | static char * |
304 | | get_parent_attr(struct udev_device *dev, const char *subsystem, |
305 | | const char *devtype, const char *attr) |
306 | 36.0k | { |
307 | 36.0k | struct udev_device *parent; |
308 | 36.0k | const char *value; |
309 | 36.0k | |
310 | 36.0k | if ((parent = udev_device_get_parent_with_subsystem_devtype(dev, |
311 | 36.0k | subsystem, devtype)) == NULL || (value = |
312 | 36.0k | udev_device_get_sysattr_value(parent, attr)) == NULL) |
313 | 36.0k | return (NULL); |
314 | 18.0k | |
315 | 18.0k | return (strdup(value)); |
316 | 18.0k | } |
317 | | |
318 | | static char * |
319 | | get_usb_attr(struct udev_device *dev, const char *attr) |
320 | 36.0k | { |
321 | 36.0k | return (get_parent_attr(dev, "usb", "usb_device", attr)); |
322 | 36.0k | } |
323 | | |
324 | | static int |
325 | | to_int(const char *str, int base) |
326 | 0 | { |
327 | 0 | char *ep; |
328 | 0 | long long ll; |
329 | 0 |
|
330 | 0 | ll = strtoll(str, &ep, base); |
331 | 0 | if (str == ep || *ep != '\0') |
332 | 0 | return (-1); |
333 | 0 | else if (ll == LLONG_MIN && errno == ERANGE) |
334 | 0 | return (-1); |
335 | 0 | else if (ll == LLONG_MAX && errno == ERANGE) |
336 | 0 | return (-1); |
337 | 0 | else if (ll < 0 || ll > INT_MAX) |
338 | 0 | return (-1); |
339 | 0 | |
340 | 0 | return ((int)ll); |
341 | 0 | } |
342 | | |
343 | | static int |
344 | | copy_info(fido_dev_info_t *di, struct udev *udev, |
345 | | struct udev_list_entry *udev_entry) |
346 | 9.23k | { |
347 | 9.23k | const char *name; |
348 | 9.23k | char *str; |
349 | 9.23k | struct udev_device *dev = NULL; |
350 | 9.23k | int id, ok = -1; |
351 | 9.23k | |
352 | 9.23k | memset(di, 0, sizeof(*di)); |
353 | 9.23k | |
354 | 9.23k | if ((name = udev_list_entry_get_name(udev_entry)) == NULL || |
355 | 9.23k | (dev = udev_device_new_from_syspath(udev, name)) == NULL) |
356 | 9.23k | goto fail; |
357 | 9.17k | |
358 | 9.17k | if ((di->path = strdup(name)) == NULL || |
359 | 9.17k | (di->manufacturer = get_usb_attr(dev, "manufacturer")) == NULL || |
360 | 9.17k | (di->product = get_usb_attr(dev, "product")) == NULL) |
361 | 9.17k | goto fail; |
362 | 8.96k | |
363 | 8.96k | /* XXX assumes USB for vendor/product info */ |
364 | 8.96k | if ((str = get_usb_attr(dev, "idVendor")) != NULL && |
365 | 8.96k | (id = to_int(str, 16)) > 0 && id <= UINT16_MAX) |
366 | 8.96k | di->vendor_id = (int16_t)id; |
367 | 8.96k | free(str); |
368 | 8.96k | |
369 | 8.96k | if ((str = get_usb_attr(dev, "idProduct")) != NULL && |
370 | 8.96k | (id = to_int(str, 16)) > 0 && id <= UINT16_MAX) |
371 | 8.96k | di->product_id = (int16_t)id; |
372 | 8.96k | free(str); |
373 | 8.96k | |
374 | 8.96k | ok = 0; |
375 | 9.23k | fail: |
376 | 9.23k | if (dev != NULL) |
377 | 9.23k | udev_device_unref(dev); |
378 | 9.23k | |
379 | 9.23k | if (ok < 0) { |
380 | 273 | free(di->path); |
381 | 273 | free(di->manufacturer); |
382 | 273 | free(di->product); |
383 | 273 | explicit_bzero(di, sizeof(*di)); |
384 | 273 | } |
385 | 9.23k | |
386 | 9.23k | return (ok); |
387 | 8.96k | } |
388 | | |
389 | | static int |
390 | | sysnum_from_syspath(const char *path) |
391 | 0 | { |
392 | 0 | struct udev *udev = NULL; |
393 | 0 | struct udev_device *dev = NULL; |
394 | 0 | const char *str; |
395 | 0 | int idx; |
396 | 0 |
|
397 | 0 | if ((udev = udev_new()) == NULL || |
398 | 0 | (dev = udev_device_new_from_syspath(udev, path)) == NULL || |
399 | 0 | (str = udev_device_get_sysnum(dev)) == NULL) |
400 | 0 | idx = -1; |
401 | 0 | else |
402 | 0 | idx = to_int(str, 10); |
403 | 0 |
|
404 | 0 | if (dev != NULL) |
405 | 0 | udev_device_unref(dev); |
406 | 0 | if (udev != NULL) |
407 | 0 | udev_unref(udev); |
408 | 0 |
|
409 | 0 | return (idx); |
410 | 0 | } |
411 | | |
412 | | int |
413 | | fido_nfc_manifest(fido_dev_info_t *devlist, size_t ilen, size_t *olen) |
414 | 365 | { |
415 | 365 | struct udev *udev = NULL; |
416 | 365 | struct udev_enumerate *udev_enum = NULL; |
417 | 365 | struct udev_list_entry *udev_list; |
418 | 365 | struct udev_list_entry *udev_entry; |
419 | 365 | int r = FIDO_ERR_INTERNAL; |
420 | 365 | |
421 | 365 | *olen = 0; |
422 | 365 | |
423 | 365 | if (ilen == 0) |
424 | 4 | return (FIDO_OK); |
425 | 361 | |
426 | 361 | if (devlist == NULL) |
427 | 361 | return (FIDO_ERR_INVALID_ARGUMENT); |
428 | 361 | |
429 | 361 | if ((udev = udev_new()) == NULL || |
430 | 361 | (udev_enum = udev_enumerate_new(udev)) == NULL) |
431 | 361 | goto fail; |
432 | 359 | |
433 | 359 | if (udev_enumerate_add_match_subsystem(udev_enum, "nfc") < 0 || |
434 | 359 | udev_enumerate_scan_devices(udev_enum) < 0) |
435 | 2 | goto fail; |
436 | 357 | |
437 | 357 | if ((udev_list = udev_enumerate_get_list_entry(udev_enum)) == NULL) { |
438 | 13 | r = FIDO_OK; /* zero nfc devices */ |
439 | 13 | goto fail; |
440 | 13 | } |
441 | 344 | |
442 | 9.23k | udev_list_entry_foreach(udev_entry, udev_list) { |
443 | 9.23k | if (copy_info(&devlist[*olen], udev, udev_entry) == 0) { |
444 | 8.96k | devlist[*olen].io = (fido_dev_io_t) { |
445 | 8.96k | fido_nfc_open, |
446 | 8.96k | fido_nfc_close, |
447 | 8.96k | fido_nfc_read, |
448 | 8.96k | fido_nfc_write, |
449 | 8.96k | }; |
450 | 8.96k | devlist[*olen].transport = (fido_dev_transport_t) { |
451 | 8.96k | fido_nfc_rx, |
452 | 8.96k | fido_nfc_tx, |
453 | 8.96k | }; |
454 | 8.96k | if (++(*olen) == ilen) |
455 | 120 | break; |
456 | 8.96k | } |
457 | 9.23k | } |
458 | 344 | |
459 | 344 | r = FIDO_OK; |
460 | 361 | fail: |
461 | 361 | if (udev_enum != NULL) |
462 | 361 | udev_enumerate_unref(udev_enum); |
463 | 361 | if (udev != NULL) |
464 | 361 | udev_unref(udev); |
465 | 361 | |
466 | 361 | return (r); |
467 | 344 | } |
468 | | |
469 | | static int |
470 | | nfc_target_connect(struct nfc_linux *ctx) |
471 | 0 | { |
472 | 0 | struct sockaddr_nfc sa; |
473 | 0 |
|
474 | 0 | memset(&sa, 0, sizeof(sa)); |
475 | 0 | sa.sa_family = AF_NFC; |
476 | 0 | sa.dev_idx = ctx->dev; |
477 | 0 | sa.target_idx = ctx->target; |
478 | 0 | sa.nfc_protocol = NFC_PROTO_ISO14443; |
479 | 0 |
|
480 | 0 | if ((ctx->fd = socket(AF_NFC, SOCK_SEQPACKET | SOCK_CLOEXEC, |
481 | 0 | NFC_SOCKPROTO_RAW)) == -1) { |
482 | 0 | fido_log_error(errno, "%s: socket", __func__); |
483 | 0 | return (-1); |
484 | 0 | } |
485 | 0 | if (connect(ctx->fd, (struct sockaddr *)&sa, sizeof(sa)) == -1) { |
486 | 0 | fido_log_error(errno, "%s: connect", __func__); |
487 | 0 | if (close(ctx->fd) == -1) |
488 | 0 | fido_log_error(errno, "%s: close", __func__); |
489 | 0 | ctx->fd = -1; |
490 | 0 | return (-1); |
491 | 0 | } |
492 | 0 |
|
493 | 0 | return (0); |
494 | 0 | } |
495 | | |
496 | | static void |
497 | | nfc_free(struct nfc_linux **ctx_p) |
498 | 0 | { |
499 | 0 | struct nfc_linux *ctx; |
500 | 0 |
|
501 | 0 | if (ctx_p == NULL || (ctx = *ctx_p) == NULL) |
502 | 0 | return; |
503 | 0 | if (ctx->fd != -1 && close(ctx->fd) == -1) |
504 | 0 | fido_log_error(errno, "%s: close", __func__); |
505 | 0 | if (ctx->nl != NULL) |
506 | 0 | fido_nl_free(&ctx->nl); |
507 | 0 |
|
508 | 0 | free(ctx); |
509 | 0 | *ctx_p = NULL; |
510 | 0 | } |
511 | | |
512 | | static struct nfc_linux * |
513 | | nfc_new(uint32_t dev) |
514 | 0 | { |
515 | 0 | struct nfc_linux *ctx; |
516 | 0 |
|
517 | 0 | if ((ctx = calloc(1, sizeof(*ctx))) == NULL || |
518 | 0 | (ctx->nl = fido_nl_new()) == NULL) { |
519 | 0 | nfc_free(&ctx); |
520 | 0 | return (NULL); |
521 | 0 | } |
522 | 0 | |
523 | 0 | ctx->fd = -1; |
524 | 0 | ctx->dev = dev; |
525 | 0 |
|
526 | 0 | return (ctx); |
527 | 0 | } |
528 | | |
529 | | void * |
530 | | fido_nfc_open(const char *path) |
531 | 0 | { |
532 | 0 | struct nfc_linux *ctx = NULL; |
533 | 0 | int idx; |
534 | 0 |
|
535 | 0 | if ((idx = sysnum_from_syspath(path)) < 0 || |
536 | 0 | (ctx = nfc_new((uint32_t)idx)) == NULL) { |
537 | 0 | fido_log_debug("%s: nfc_new", __func__); |
538 | 0 | goto fail; |
539 | 0 | } |
540 | 0 | if (fido_nl_power_nfc(ctx->nl, ctx->dev) < 0 || |
541 | 0 | fido_nl_get_nfc_target(ctx->nl, ctx->dev, &ctx->target) < 0 || |
542 | 0 | nfc_target_connect(ctx) < 0) { |
543 | 0 | fido_log_debug("%s: netlink", __func__); |
544 | 0 | goto fail; |
545 | 0 | } |
546 | 0 | |
547 | 0 | return (ctx); |
548 | 0 | fail: |
549 | 0 | nfc_free(&ctx); |
550 | 0 | return (NULL); |
551 | 0 | } |
552 | | |
553 | | void |
554 | | fido_nfc_close(void *handle) |
555 | 0 | { |
556 | 0 | struct nfc_linux *ctx = handle; |
557 | 0 |
|
558 | 0 | nfc_free(&ctx); |
559 | 0 | } |
560 | | |
561 | | int |
562 | | fido_nfc_set_sigmask(void *handle, const fido_sigset_t *sigmask) |
563 | 0 | { |
564 | 0 | struct nfc_linux *ctx = handle; |
565 | 0 |
|
566 | 0 | ctx->sigmask = *sigmask; |
567 | 0 | ctx->sigmaskp = &ctx->sigmask; |
568 | 0 |
|
569 | 0 | return (FIDO_OK); |
570 | 0 | } |
571 | | |
572 | | int |
573 | | fido_nfc_read(void *handle, unsigned char *buf, size_t len, int ms) |
574 | 0 | { |
575 | 0 | struct nfc_linux *ctx = handle; |
576 | 0 | struct iovec iov[2]; |
577 | 0 | uint8_t preamble; |
578 | 0 | ssize_t r; |
579 | 0 |
|
580 | 0 | memset(&iov, 0, sizeof(iov)); |
581 | 0 | iov[0].iov_base = &preamble; |
582 | 0 | iov[0].iov_len = sizeof(preamble); |
583 | 0 | iov[1].iov_base = buf; |
584 | 0 | iov[1].iov_len = len; |
585 | 0 |
|
586 | 0 | if (fido_hid_unix_wait(ctx->fd, ms, ctx->sigmaskp) < 0) { |
587 | 0 | fido_log_debug("%s: fido_hid_unix_wait", __func__); |
588 | 0 | return (-1); |
589 | 0 | } |
590 | 0 | if ((r = readv(ctx->fd, iov, nitems(iov))) == -1) { |
591 | 0 | fido_log_error(errno, "%s: read", __func__); |
592 | 0 | return (-1); |
593 | 0 | } |
594 | 0 | if (r < 1) { |
595 | 0 | fido_log_debug("%s: %zd < 1", __func__, r); |
596 | 0 | return (-1); |
597 | 0 | } |
598 | 0 | if (preamble != 0x00) { |
599 | 0 | fido_log_debug("%s: preamble", __func__); |
600 | 0 | return (-1); |
601 | 0 | } |
602 | 0 | |
603 | 0 | r--; |
604 | 0 | fido_log_xxd(buf, (size_t)r, "%s", __func__); |
605 | 0 |
|
606 | 0 | return ((int)r); |
607 | 0 | } |
608 | | |
609 | | int |
610 | | fido_nfc_write(void *handle, const unsigned char *buf, size_t len) |
611 | 0 | { |
612 | 0 | struct nfc_linux *ctx = handle; |
613 | 0 | ssize_t r; |
614 | 0 |
|
615 | 0 | fido_log_xxd(buf, len, "%s", __func__); |
616 | 0 |
|
617 | 0 | if (len > INT_MAX) { |
618 | 0 | fido_log_debug("%s: len", __func__); |
619 | 0 | return (-1); |
620 | 0 | } |
621 | 0 | if ((r = write(ctx->fd, buf, len)) == -1) { |
622 | 0 | fido_log_error(errno, "%s: write", __func__); |
623 | 0 | return (-1); |
624 | 0 | } |
625 | 0 | if (r < 0 || (size_t)r != len) { |
626 | 0 | fido_log_debug("%s: %zd != %zu", __func__, r, len); |
627 | 0 | return (-1); |
628 | 0 | } |
629 | 0 | |
630 | 0 | return ((int)r); |
631 | 0 | } |