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1c0c4a43 LP |
1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
2 | ||
3 | #if HAVE_LIBFIDO2 | |
4 | #include <fido.h> | |
5 | #endif | |
6 | ||
7 | #include "ask-password-api.h" | |
8 | #include "errno-util.h" | |
9 | #include "format-table.h" | |
10 | #include "hexdecoct.h" | |
11 | #include "homectl-fido2.h" | |
12 | #include "libcrypt-util.h" | |
13 | #include "locale-util.h" | |
14 | #include "memory-util.h" | |
15 | #include "random-util.h" | |
16 | #include "strv.h" | |
17 | ||
18 | #if HAVE_LIBFIDO2 | |
19 | static int add_fido2_credential_id( | |
20 | JsonVariant **v, | |
21 | const void *cid, | |
22 | size_t cid_size) { | |
23 | ||
24 | _cleanup_(json_variant_unrefp) JsonVariant *w = NULL; | |
25 | _cleanup_strv_free_ char **l = NULL; | |
26 | _cleanup_free_ char *escaped = NULL; | |
27 | int r; | |
28 | ||
29 | assert(v); | |
30 | assert(cid); | |
31 | ||
32 | r = base64mem(cid, cid_size, &escaped); | |
33 | if (r < 0) | |
34 | return log_error_errno(r, "Failed to base64 encode FIDO2 credential ID: %m"); | |
35 | ||
36 | w = json_variant_ref(json_variant_by_key(*v, "fido2HmacCredential")); | |
37 | if (w) { | |
38 | r = json_variant_strv(w, &l); | |
39 | if (r < 0) | |
40 | return log_error_errno(r, "Failed to parse FIDO2 credential ID list: %m"); | |
41 | ||
42 | if (strv_contains(l, escaped)) | |
43 | return 0; | |
44 | } | |
45 | ||
46 | r = strv_extend(&l, escaped); | |
47 | if (r < 0) | |
48 | return log_oom(); | |
49 | ||
50 | w = json_variant_unref(w); | |
51 | r = json_variant_new_array_strv(&w, l); | |
52 | if (r < 0) | |
53 | return log_error_errno(r, "Failed to create FIDO2 credential ID JSON: %m"); | |
54 | ||
55 | r = json_variant_set_field(v, "fido2HmacCredential", w); | |
56 | if (r < 0) | |
57 | return log_error_errno(r, "Failed to update FIDO2 credential ID: %m"); | |
58 | ||
59 | return 0; | |
60 | } | |
61 | ||
62 | static int add_fido2_salt( | |
63 | JsonVariant **v, | |
64 | const void *cid, | |
65 | size_t cid_size, | |
66 | const void *fido2_salt, | |
67 | size_t fido2_salt_size, | |
68 | const void *secret, | |
69 | size_t secret_size) { | |
70 | ||
71 | _cleanup_(json_variant_unrefp) JsonVariant *l = NULL, *w = NULL, *e = NULL; | |
72 | _cleanup_(erase_and_freep) char *base64_encoded = NULL; | |
73 | _cleanup_free_ char *unix_salt = NULL; | |
74 | struct crypt_data cd = {}; | |
75 | char *k; | |
76 | int r; | |
77 | ||
78 | r = make_salt(&unix_salt); | |
79 | if (r < 0) | |
80 | return log_error_errno(r, "Failed to generate salt: %m"); | |
81 | ||
82 | /* Before using UNIX hashing on the supplied key we base64 encode it, since crypt_r() and friends | |
83 | * expect a NUL terminated string, and we use a binary key */ | |
84 | r = base64mem(secret, secret_size, &base64_encoded); | |
85 | if (r < 0) | |
86 | return log_error_errno(r, "Failed to base64 encode secret key: %m"); | |
87 | ||
88 | errno = 0; | |
89 | k = crypt_r(base64_encoded, unix_salt, &cd); | |
90 | if (!k) | |
91 | return log_error_errno(errno_or_else(EINVAL), "Failed to UNIX hash secret key: %m"); | |
92 | ||
93 | r = json_build(&e, JSON_BUILD_OBJECT( | |
94 | JSON_BUILD_PAIR("credential", JSON_BUILD_BASE64(cid, cid_size)), | |
95 | JSON_BUILD_PAIR("salt", JSON_BUILD_BASE64(fido2_salt, fido2_salt_size)), | |
96 | JSON_BUILD_PAIR("hashedPassword", JSON_BUILD_STRING(k)))); | |
97 | if (r < 0) | |
98 | return log_error_errno(r, "Failed to build FIDO2 salt JSON key object: %m"); | |
99 | ||
100 | w = json_variant_ref(json_variant_by_key(*v, "privileged")); | |
101 | l = json_variant_ref(json_variant_by_key(w, "fido2HmacSalt")); | |
102 | ||
103 | r = json_variant_append_array(&l, e); | |
104 | if (r < 0) | |
105 | return log_error_errno(r, "Failed append FIDO2 salt: %m"); | |
106 | ||
107 | r = json_variant_set_field(&w, "fido2HmacSalt", l); | |
108 | if (r < 0) | |
109 | return log_error_errno(r, "Failed to set FDO2 salt: %m"); | |
110 | ||
111 | r = json_variant_set_field(v, "privileged", w); | |
112 | if (r < 0) | |
113 | return log_error_errno(r, "Failed to update privileged field: %m"); | |
114 | ||
115 | return 0; | |
116 | } | |
117 | #endif | |
118 | ||
119 | #define FIDO2_SALT_SIZE 32 | |
120 | ||
121 | int identity_add_fido2_parameters( | |
122 | JsonVariant **v, | |
123 | const char *device) { | |
124 | ||
125 | #if HAVE_LIBFIDO2 | |
126 | _cleanup_(fido_cbor_info_free) fido_cbor_info_t *di = NULL; | |
127 | _cleanup_(fido_assert_free) fido_assert_t *a = NULL; | |
128 | _cleanup_(erase_and_freep) char *used_pin = NULL; | |
129 | _cleanup_(fido_cred_free) fido_cred_t *c = NULL; | |
130 | _cleanup_(fido_dev_free) fido_dev_t *d = NULL; | |
131 | _cleanup_(erase_and_freep) void *salt = NULL; | |
132 | JsonVariant *un, *realm, *rn; | |
133 | bool found_extension = false; | |
134 | const void *cid, *secret; | |
135 | const char *fido_un; | |
136 | size_t n, cid_size, secret_size; | |
137 | char **e; | |
138 | int r; | |
139 | ||
140 | /* Construction is like this: we generate a salt of 32 bytes. We then ask the FIDO2 device to | |
141 | * HMAC-SHA256 it for us with its internal key. The result is the key used by LUKS and account | |
142 | * authentication. LUKS and UNIX password auth all do their own salting before hashing, so that FIDO2 | |
143 | * device never sees the volume key. | |
144 | * | |
145 | * S = HMAC-SHA256(I, D) | |
146 | * | |
147 | * with: S → LUKS/account authentication key (never stored) | |
148 | * I → internal key on FIDO2 device (stored in the FIDO2 device) | |
149 | * D → salt we generate here (stored in the privileged part of the JSON record) | |
150 | * | |
151 | */ | |
152 | ||
153 | assert(v); | |
154 | assert(device); | |
155 | ||
156 | salt = malloc(FIDO2_SALT_SIZE); | |
157 | if (!salt) | |
158 | return log_oom(); | |
159 | ||
160 | r = genuine_random_bytes(salt, FIDO2_SALT_SIZE, RANDOM_BLOCK); | |
161 | if (r < 0) | |
162 | return log_error_errno(r, "Failed to generate salt: %m"); | |
163 | ||
164 | d = fido_dev_new(); | |
165 | if (!d) | |
166 | return log_oom(); | |
167 | ||
168 | r = fido_dev_open(d, device); | |
169 | if (r != FIDO_OK) | |
170 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
171 | "Failed to open FIDO2 device %s: %s", device, fido_strerr(r)); | |
172 | ||
173 | if (!fido_dev_is_fido2(d)) | |
174 | return log_error_errno(SYNTHETIC_ERRNO(ENODEV), | |
175 | "Specified device %s is not a FIDO2 device.", device); | |
176 | ||
177 | di = fido_cbor_info_new(); | |
178 | if (!di) | |
179 | return log_oom(); | |
180 | ||
181 | r = fido_dev_get_cbor_info(d, di); | |
182 | if (r != FIDO_OK) | |
183 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
184 | "Failed to get CBOR device info for %s: %s", device, fido_strerr(r)); | |
185 | ||
186 | e = fido_cbor_info_extensions_ptr(di); | |
187 | n = fido_cbor_info_extensions_len(di); | |
188 | ||
189 | for (size_t i = 0; i < n; i++) | |
190 | if (streq(e[i], "hmac-secret")) { | |
191 | found_extension = true; | |
192 | break; | |
193 | } | |
194 | ||
195 | if (!found_extension) | |
196 | return log_error_errno(SYNTHETIC_ERRNO(ENODEV), | |
197 | "Specified device %s is a FIDO2 device, but does not support the required HMAC-SECRET extension.", device); | |
198 | ||
199 | c = fido_cred_new(); | |
200 | if (!c) | |
201 | return log_oom(); | |
202 | ||
203 | r = fido_cred_set_extensions(c, FIDO_EXT_HMAC_SECRET); | |
204 | if (r != FIDO_OK) | |
205 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
206 | "Failed to enable HMAC-SECRET extension on FIDO2 credential: %s", fido_strerr(r)); | |
207 | ||
208 | r = fido_cred_set_rp(c, "io.systemd.home", "Home Directory"); | |
209 | if (r != FIDO_OK) | |
210 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
211 | "Failed to set FIDO2 credential relying party ID/name: %s", fido_strerr(r)); | |
212 | ||
213 | r = fido_cred_set_type(c, COSE_ES256); | |
214 | if (r != FIDO_OK) | |
215 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
216 | "Failed to set FIDO2 credential type to ES256: %s", fido_strerr(r)); | |
217 | ||
218 | un = json_variant_by_key(*v, "userName"); | |
219 | if (!un) | |
220 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
221 | "userName field of user record is missing"); | |
222 | if (!json_variant_is_string(un)) | |
223 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
224 | "userName field of user record is not a string"); | |
225 | ||
226 | realm = json_variant_by_key(*v, "realm"); | |
227 | if (realm) { | |
228 | if (!json_variant_is_string(realm)) | |
229 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
230 | "realm field of user record is not a string"); | |
231 | ||
232 | fido_un = strjoina(json_variant_string(un), json_variant_string(realm)); | |
233 | } else | |
234 | fido_un = json_variant_string(un); | |
235 | ||
236 | rn = json_variant_by_key(*v, "realName"); | |
237 | if (rn && !json_variant_is_string(rn)) | |
238 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
239 | "realName field of user record is not a string"); | |
240 | ||
241 | r = fido_cred_set_user(c, | |
242 | (const unsigned char*) fido_un, strlen(fido_un), /* We pass the user ID and name as the same */ | |
243 | fido_un, | |
244 | rn ? json_variant_string(rn) : NULL, | |
245 | NULL /* icon URL */); | |
246 | if (r != FIDO_OK) | |
247 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
248 | "Failed to set FIDO2 credential user data: %s", fido_strerr(r)); | |
249 | ||
250 | r = fido_cred_set_clientdata_hash(c, (const unsigned char[32]) {}, 32); | |
251 | if (r != FIDO_OK) | |
252 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
253 | "Failed to set FIDO2 client data hash: %s", fido_strerr(r)); | |
254 | ||
255 | r = fido_cred_set_rk(c, FIDO_OPT_FALSE); | |
256 | if (r != FIDO_OK) | |
257 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
258 | "Failed to turn off FIDO2 resident key option of credential: %s", fido_strerr(r)); | |
259 | ||
260 | r = fido_cred_set_uv(c, FIDO_OPT_FALSE); | |
261 | if (r != FIDO_OK) | |
262 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
263 | "Failed to turn off FIDO2 user verification option of credential: %s", fido_strerr(r)); | |
264 | ||
265 | log_info("Initializing FIDO2 credential on security token."); | |
266 | ||
267 | log_notice("%s%s(Hint: This might require verification of user presence on security token.)", | |
268 | emoji_enabled() ? special_glyph(SPECIAL_GLYPH_TOUCH) : "", | |
269 | emoji_enabled() ? " " : ""); | |
270 | ||
271 | r = fido_dev_make_cred(d, c, NULL); | |
272 | if (r == FIDO_ERR_PIN_REQUIRED) { | |
273 | _cleanup_free_ char *text = NULL; | |
274 | ||
275 | if (asprintf(&text, "Please enter security token PIN:") < 0) | |
276 | return log_oom(); | |
277 | ||
278 | for (;;) { | |
279 | _cleanup_(strv_free_erasep) char **pin = NULL; | |
280 | char **i; | |
281 | ||
282 | r = ask_password_auto(text, "user-home", NULL, "fido2-pin", USEC_INFINITY, 0, &pin); | |
283 | if (r < 0) | |
284 | return log_error_errno(r, "Failed to acquire user PIN: %m"); | |
285 | ||
286 | r = FIDO_ERR_PIN_INVALID; | |
287 | STRV_FOREACH(i, pin) { | |
288 | if (isempty(*i)) { | |
289 | log_info("PIN may not be empty."); | |
290 | continue; | |
291 | } | |
292 | ||
293 | r = fido_dev_make_cred(d, c, *i); | |
294 | if (r == FIDO_OK) { | |
295 | used_pin = strdup(*i); | |
296 | if (!used_pin) | |
297 | return log_oom(); | |
298 | break; | |
299 | } | |
300 | if (r != FIDO_ERR_PIN_INVALID) | |
301 | break; | |
302 | } | |
303 | ||
304 | if (r != FIDO_ERR_PIN_INVALID) | |
305 | break; | |
306 | ||
307 | log_notice("PIN incorrect, please try again."); | |
308 | } | |
309 | } | |
310 | if (r == FIDO_ERR_PIN_AUTH_BLOCKED) | |
311 | return log_notice_errno(SYNTHETIC_ERRNO(EPERM), | |
312 | "Token PIN is currently blocked, please remove and reinsert token."); | |
313 | if (r == FIDO_ERR_ACTION_TIMEOUT) | |
314 | return log_error_errno(SYNTHETIC_ERRNO(ENOSTR), | |
315 | "Token action timeout. (User didn't interact with token quickly enough.)"); | |
316 | if (r != FIDO_OK) | |
317 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
318 | "Failed to generate FIDO2 credential: %s", fido_strerr(r)); | |
319 | ||
320 | cid = fido_cred_id_ptr(c); | |
321 | if (!cid) | |
322 | return log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to get FIDO2 credential ID."); | |
323 | ||
324 | cid_size = fido_cred_id_len(c); | |
325 | ||
326 | a = fido_assert_new(); | |
327 | if (!a) | |
328 | return log_oom(); | |
329 | ||
330 | r = fido_assert_set_extensions(a, FIDO_EXT_HMAC_SECRET); | |
331 | if (r != FIDO_OK) | |
332 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
333 | "Failed to enable HMAC-SECRET extension on FIDO2 assertion: %s", fido_strerr(r)); | |
334 | ||
335 | r = fido_assert_set_hmac_salt(a, salt, FIDO2_SALT_SIZE); | |
336 | if (r != FIDO_OK) | |
337 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
338 | "Failed to set salt on FIDO2 assertion: %s", fido_strerr(r)); | |
339 | ||
340 | r = fido_assert_set_rp(a, "io.systemd.home"); | |
341 | if (r != FIDO_OK) | |
342 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
343 | "Failed to set FIDO2 assertion ID: %s", fido_strerr(r)); | |
344 | ||
345 | r = fido_assert_set_clientdata_hash(a, (const unsigned char[32]) {}, 32); | |
346 | if (r != FIDO_OK) | |
347 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
348 | "Failed to set FIDO2 assertion client data hash: %s", fido_strerr(r)); | |
349 | ||
350 | r = fido_assert_allow_cred(a, cid, cid_size); | |
351 | if (r != FIDO_OK) | |
352 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
353 | "Failed to add FIDO2 assertion credential ID: %s", fido_strerr(r)); | |
354 | ||
355 | r = fido_assert_set_up(a, FIDO_OPT_FALSE); | |
356 | if (r != FIDO_OK) | |
357 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
358 | "Failed to turn off FIDO2 assertion user presence: %s", fido_strerr(r)); | |
359 | ||
360 | log_info("Generating secret key on FIDO2 security token."); | |
361 | ||
362 | r = fido_dev_get_assert(d, a, used_pin); | |
363 | if (r == FIDO_ERR_UP_REQUIRED) { | |
364 | r = fido_assert_set_up(a, FIDO_OPT_TRUE); | |
365 | if (r != FIDO_OK) | |
366 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
367 | "Failed to turn on FIDO2 assertion user presence: %s", fido_strerr(r)); | |
368 | ||
369 | log_notice("%s%sIn order to allow secret key generation, please verify presence on security token.", | |
370 | emoji_enabled() ? special_glyph(SPECIAL_GLYPH_TOUCH) : "", | |
371 | emoji_enabled() ? " " : ""); | |
372 | ||
373 | r = fido_dev_get_assert(d, a, used_pin); | |
374 | } | |
375 | if (r == FIDO_ERR_ACTION_TIMEOUT) | |
376 | return log_error_errno(SYNTHETIC_ERRNO(ENOSTR), | |
377 | "Token action timeout. (User didn't interact with token quickly enough.)"); | |
378 | if (r != FIDO_OK) | |
379 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
380 | "Failed to ask token for assertion: %s", fido_strerr(r)); | |
381 | ||
382 | secret = fido_assert_hmac_secret_ptr(a, 0); | |
383 | if (!secret) | |
384 | return log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to retrieve HMAC secret."); | |
385 | ||
386 | secret_size = fido_assert_hmac_secret_len(a, 0); | |
387 | ||
388 | r = add_fido2_credential_id(v, cid, cid_size); | |
389 | if (r < 0) | |
390 | return r; | |
391 | ||
392 | r = add_fido2_salt(v, | |
393 | cid, | |
394 | cid_size, | |
395 | salt, | |
396 | FIDO2_SALT_SIZE, | |
397 | secret, | |
398 | secret_size); | |
399 | if (r < 0) | |
400 | return r; | |
401 | ||
402 | return 0; | |
403 | #else | |
404 | return log_error_errno(EOPNOTSUPP, "FIDO2 tokens not supported on this build."); | |
405 | #endif | |
406 | } | |
407 | ||
408 | int list_fido2_devices(void) { | |
409 | #if HAVE_LIBFIDO2 | |
410 | _cleanup_(table_unrefp) Table *t = NULL; | |
411 | size_t allocated = 64, found = 0; | |
412 | fido_dev_info_t *di = NULL; | |
413 | int r; | |
414 | ||
415 | di = fido_dev_info_new(allocated); | |
416 | if (!di) | |
417 | return log_oom(); | |
418 | ||
419 | r = fido_dev_info_manifest(di, allocated, &found); | |
420 | if (r == FIDO_ERR_INTERNAL || (r == FIDO_OK && found == 0)) { | |
421 | /* The library returns FIDO_ERR_INTERNAL when no devices are found. I wish it wouldn't. */ | |
422 | log_info("No FIDO2 devices found."); | |
423 | r = 0; | |
424 | goto finish; | |
425 | } | |
426 | if (r != FIDO_OK) { | |
427 | r = log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to enumerate FIDO2 devices: %s", fido_strerr(r)); | |
428 | goto finish; | |
429 | } | |
430 | ||
431 | t = table_new("path", "manufacturer", "product"); | |
432 | if (!t) { | |
433 | r = log_oom(); | |
434 | goto finish; | |
435 | } | |
436 | ||
437 | for (size_t i = 0; i < found; i++) { | |
438 | const fido_dev_info_t *entry; | |
439 | ||
440 | entry = fido_dev_info_ptr(di, i); | |
441 | if (!entry) { | |
442 | r = log_error_errno(SYNTHETIC_ERRNO(EIO), | |
443 | "Failed to get device information for FIDO device %zu.", i); | |
444 | goto finish; | |
445 | } | |
446 | ||
447 | r = table_add_many( | |
448 | t, | |
449 | TABLE_PATH, fido_dev_info_path(entry), | |
450 | TABLE_STRING, fido_dev_info_manufacturer_string(entry), | |
451 | TABLE_STRING, fido_dev_info_product_string(entry)); | |
452 | if (r < 0) { | |
453 | table_log_add_error(r); | |
454 | goto finish; | |
455 | } | |
456 | } | |
457 | ||
458 | r = table_print(t, stdout); | |
459 | if (r < 0) { | |
460 | log_error_errno(r, "Failed to show device table: %m"); | |
461 | goto finish; | |
462 | } | |
463 | ||
464 | r = 0; | |
465 | ||
466 | finish: | |
467 | fido_dev_info_free(&di, allocated); | |
468 | return r; | |
469 | #else | |
470 | return log_error_errno(EOPNOTSUPP, "FIDO2 tokens not supported on this build."); | |
471 | #endif | |
472 | } | |
473 | ||
474 | int find_fido2_auto(char **ret) { | |
475 | #if HAVE_LIBFIDO2 | |
476 | _cleanup_free_ char *copy = NULL; | |
477 | size_t di_size = 64, found = 0; | |
478 | const fido_dev_info_t *entry; | |
479 | fido_dev_info_t *di = NULL; | |
480 | const char *path; | |
481 | int r; | |
482 | ||
483 | di = fido_dev_info_new(di_size); | |
484 | if (!di) | |
485 | return log_oom(); | |
486 | ||
487 | r = fido_dev_info_manifest(di, di_size, &found); | |
488 | if (r == FIDO_ERR_INTERNAL || (r == FIDO_OK && found == 0)) { | |
489 | /* The library returns FIDO_ERR_INTERNAL when no devices are found. I wish it wouldn't. */ | |
490 | r = log_error_errno(SYNTHETIC_ERRNO(ENODEV), "No FIDO2 devices found."); | |
491 | goto finish; | |
492 | } | |
493 | if (r != FIDO_OK) { | |
494 | r = log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to enumerate FIDO2 devices: %s", fido_strerr(r)); | |
495 | goto finish; | |
496 | } | |
497 | if (found > 1) { | |
498 | r = log_error_errno(SYNTHETIC_ERRNO(ENOTUNIQ), "More than one FIDO2 device found."); | |
499 | goto finish; | |
500 | } | |
501 | ||
502 | entry = fido_dev_info_ptr(di, 0); | |
503 | if (!entry) { | |
504 | r = log_error_errno(SYNTHETIC_ERRNO(EIO), | |
505 | "Failed to get device information for FIDO device 0."); | |
506 | goto finish; | |
507 | } | |
508 | ||
509 | path = fido_dev_info_path(entry); | |
510 | if (!path) { | |
511 | r = log_error_errno(SYNTHETIC_ERRNO(EIO), | |
512 | "Failed to query FIDO device path."); | |
513 | goto finish; | |
514 | } | |
515 | ||
516 | copy = strdup(path); | |
517 | if (!copy) { | |
518 | r = log_oom(); | |
519 | goto finish; | |
520 | } | |
521 | ||
522 | *ret = TAKE_PTR(copy); | |
523 | r = 0; | |
524 | ||
525 | finish: | |
526 | fido_dev_info_free(&di, di_size); | |
527 | return r; | |
528 | #else | |
529 | return log_error_errno(EOPNOTSUPP, "FIDO2 tokens not supported on this build."); | |
530 | #endif | |
531 | } |