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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
839fddbe LP |
2 | |
3 | #include <fcntl.h> | |
4 | ||
5 | #include "ask-password-api.h" | |
7a6abbe9 | 6 | #include "env-util.h" |
839fddbe LP |
7 | #include "escape.h" |
8 | #include "fd-util.h" | |
f240cbb6 | 9 | #include "format-table.h" |
839fddbe LP |
10 | #include "io-util.h" |
11 | #include "memory-util.h" | |
12 | #if HAVE_OPENSSL | |
13 | #include "openssl-util.h" | |
14 | #endif | |
15 | #include "pkcs11-util.h" | |
16 | #include "random-util.h" | |
17 | #include "string-util.h" | |
18 | #include "strv.h" | |
19 | ||
20 | bool pkcs11_uri_valid(const char *uri) { | |
21 | const char *p; | |
22 | ||
23 | /* A very superficial checker for RFC7512 PKCS#11 URI syntax */ | |
24 | ||
25 | if (isempty(uri)) | |
26 | return false; | |
27 | ||
28 | p = startswith(uri, "pkcs11:"); | |
29 | if (!p) | |
30 | return false; | |
31 | ||
32 | if (isempty(p)) | |
33 | return false; | |
34 | ||
b204bdd4 | 35 | if (!in_charset(p, ALPHANUMERICAL ".~/-_?;&%=")) |
839fddbe LP |
36 | return false; |
37 | ||
38 | return true; | |
39 | } | |
40 | ||
41 | #if HAVE_P11KIT | |
42 | ||
43 | int uri_from_string(const char *p, P11KitUri **ret) { | |
44 | _cleanup_(p11_kit_uri_freep) P11KitUri *uri = NULL; | |
45 | ||
46 | assert(p); | |
47 | assert(ret); | |
48 | ||
49 | uri = p11_kit_uri_new(); | |
50 | if (!uri) | |
51 | return -ENOMEM; | |
52 | ||
53 | if (p11_kit_uri_parse(p, P11_KIT_URI_FOR_ANY, uri) != P11_KIT_URI_OK) | |
54 | return -EINVAL; | |
55 | ||
56 | *ret = TAKE_PTR(uri); | |
57 | return 0; | |
58 | } | |
59 | ||
60 | P11KitUri *uri_from_module_info(const CK_INFO *info) { | |
61 | P11KitUri *uri; | |
62 | ||
63 | assert(info); | |
64 | ||
65 | uri = p11_kit_uri_new(); | |
66 | if (!uri) | |
67 | return NULL; | |
68 | ||
69 | *p11_kit_uri_get_module_info(uri) = *info; | |
70 | return uri; | |
71 | } | |
72 | ||
73 | P11KitUri *uri_from_slot_info(const CK_SLOT_INFO *slot_info) { | |
74 | P11KitUri *uri; | |
75 | ||
76 | assert(slot_info); | |
77 | ||
78 | uri = p11_kit_uri_new(); | |
79 | if (!uri) | |
80 | return NULL; | |
81 | ||
82 | *p11_kit_uri_get_slot_info(uri) = *slot_info; | |
83 | return uri; | |
84 | } | |
85 | ||
86 | P11KitUri *uri_from_token_info(const CK_TOKEN_INFO *token_info) { | |
87 | P11KitUri *uri; | |
88 | ||
89 | assert(token_info); | |
90 | ||
91 | uri = p11_kit_uri_new(); | |
92 | if (!uri) | |
93 | return NULL; | |
94 | ||
95 | *p11_kit_uri_get_token_info(uri) = *token_info; | |
96 | return uri; | |
97 | } | |
98 | ||
99 | CK_RV pkcs11_get_slot_list_malloc( | |
100 | CK_FUNCTION_LIST *m, | |
101 | CK_SLOT_ID **ret_slotids, | |
102 | CK_ULONG *ret_n_slotids) { | |
103 | ||
104 | CK_RV rv; | |
105 | ||
106 | assert(m); | |
107 | assert(ret_slotids); | |
108 | assert(ret_n_slotids); | |
109 | ||
110 | for (unsigned tries = 0; tries < 16; tries++) { | |
111 | _cleanup_free_ CK_SLOT_ID *slotids = NULL; | |
112 | CK_ULONG n_slotids = 0; | |
113 | ||
114 | rv = m->C_GetSlotList(0, NULL, &n_slotids); | |
115 | if (rv != CKR_OK) | |
116 | return rv; | |
117 | if (n_slotids == 0) { | |
118 | *ret_slotids = NULL; | |
119 | *ret_n_slotids = 0; | |
120 | return CKR_OK; | |
121 | } | |
122 | ||
123 | slotids = new(CK_SLOT_ID, n_slotids); | |
124 | if (!slotids) | |
125 | return CKR_HOST_MEMORY; | |
126 | ||
127 | rv = m->C_GetSlotList(0, slotids, &n_slotids); | |
128 | if (rv == CKR_OK) { | |
129 | *ret_slotids = TAKE_PTR(slotids); | |
130 | *ret_n_slotids = n_slotids; | |
131 | return CKR_OK; | |
132 | } | |
133 | ||
134 | if (rv != CKR_BUFFER_TOO_SMALL) | |
135 | return rv; | |
136 | ||
137 | /* Hu? Maybe somebody plugged something in and things changed? Let's try again */ | |
138 | } | |
139 | ||
140 | return CKR_BUFFER_TOO_SMALL; | |
141 | } | |
142 | ||
143 | char *pkcs11_token_label(const CK_TOKEN_INFO *token_info) { | |
144 | char *t; | |
145 | ||
146 | /* The label is not NUL terminated and likely padded with spaces, let's make a copy here, so that we | |
147 | * can strip that. */ | |
148 | t = strndup((char*) token_info->label, sizeof(token_info->label)); | |
149 | if (!t) | |
150 | return NULL; | |
151 | ||
152 | strstrip(t); | |
153 | return t; | |
154 | } | |
155 | ||
0eb3be46 LP |
156 | char *pkcs11_token_manufacturer_id(const CK_TOKEN_INFO *token_info) { |
157 | char *t; | |
158 | ||
159 | t = strndup((char*) token_info->manufacturerID, sizeof(token_info->manufacturerID)); | |
160 | if (!t) | |
161 | return NULL; | |
162 | ||
163 | strstrip(t); | |
164 | return t; | |
165 | } | |
166 | ||
167 | char *pkcs11_token_model(const CK_TOKEN_INFO *token_info) { | |
168 | char *t; | |
169 | ||
170 | t = strndup((char*) token_info->model, sizeof(token_info->model)); | |
171 | if (!t) | |
172 | return NULL; | |
173 | ||
174 | strstrip(t); | |
175 | return t; | |
176 | } | |
177 | ||
0ff60566 OK |
178 | int pkcs11_token_login_by_pin( |
179 | CK_FUNCTION_LIST *m, | |
180 | CK_SESSION_HANDLE session, | |
181 | const CK_TOKEN_INFO *token_info, | |
182 | const char *token_label, | |
183 | const void *pin, | |
184 | size_t pin_size) { | |
185 | ||
186 | CK_RV rv; | |
187 | ||
188 | assert(m); | |
189 | assert(token_info); | |
190 | ||
191 | if (FLAGS_SET(token_info->flags, CKF_PROTECTED_AUTHENTICATION_PATH)) { | |
192 | rv = m->C_Login(session, CKU_USER, NULL, 0); | |
193 | if (rv != CKR_OK) | |
194 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
195 | "Failed to log into security token '%s': %s", token_label, p11_kit_strerror(rv)); | |
196 | ||
197 | log_info("Successfully logged into security token '%s' via protected authentication path.", token_label); | |
198 | return 0; | |
199 | } | |
200 | ||
201 | if (!FLAGS_SET(token_info->flags, CKF_LOGIN_REQUIRED)) { | |
202 | log_info("No login into security token '%s' required.", token_label); | |
203 | return 0; | |
204 | } | |
205 | ||
206 | if (!pin) | |
207 | return -ENOANO; | |
208 | ||
209 | rv = m->C_Login(session, CKU_USER, (CK_UTF8CHAR*) pin, pin_size); | |
210 | if (rv == CKR_OK) { | |
211 | log_info("Successfully logged into security token '%s'.", token_label); | |
212 | return 0; | |
213 | } | |
214 | ||
215 | if (rv == CKR_PIN_LOCKED) | |
216 | return log_error_errno(SYNTHETIC_ERRNO(EPERM), | |
217 | "PIN has been locked, please reset PIN of security token '%s'.", token_label); | |
218 | if (!IN_SET(rv, CKR_PIN_INCORRECT, CKR_PIN_LEN_RANGE)) | |
219 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
220 | "Failed to log into security token '%s': %s", token_label, p11_kit_strerror(rv)); | |
221 | ||
b98416e1 FS |
222 | return log_notice_errno(SYNTHETIC_ERRNO(ENOLCK), |
223 | "PIN for token '%s' is incorrect, please try again.", | |
224 | token_label); | |
0ff60566 OK |
225 | } |
226 | ||
839fddbe LP |
227 | int pkcs11_token_login( |
228 | CK_FUNCTION_LIST *m, | |
229 | CK_SESSION_HANDLE session, | |
230 | CK_SLOT_ID slotid, | |
231 | const CK_TOKEN_INFO *token_info, | |
232 | const char *friendly_name, | |
233 | const char *icon_name, | |
8806bb4b LP |
234 | const char *key_name, |
235 | const char *credential_name, | |
839fddbe | 236 | usec_t until, |
cd5f57bd | 237 | bool headless, |
839fddbe LP |
238 | char **ret_used_pin) { |
239 | ||
240 | _cleanup_free_ char *token_uri_string = NULL, *token_uri_escaped = NULL, *id = NULL, *token_label = NULL; | |
241 | _cleanup_(p11_kit_uri_freep) P11KitUri *token_uri = NULL; | |
242 | CK_TOKEN_INFO updated_token_info; | |
0eb3be46 | 243 | int uri_result, r; |
839fddbe | 244 | CK_RV rv; |
839fddbe LP |
245 | |
246 | assert(m); | |
247 | assert(token_info); | |
248 | ||
249 | token_label = pkcs11_token_label(token_info); | |
250 | if (!token_label) | |
251 | return log_oom(); | |
252 | ||
253 | token_uri = uri_from_token_info(token_info); | |
254 | if (!token_uri) | |
255 | return log_oom(); | |
256 | ||
257 | uri_result = p11_kit_uri_format(token_uri, P11_KIT_URI_FOR_ANY, &token_uri_string); | |
258 | if (uri_result != P11_KIT_URI_OK) | |
259 | return log_warning_errno(SYNTHETIC_ERRNO(EAGAIN), "Failed to format slot URI: %s", p11_kit_uri_message(uri_result)); | |
260 | ||
0ff60566 OK |
261 | r = pkcs11_token_login_by_pin(m, session, token_info, token_label, /* pin= */ NULL, 0); |
262 | if (r == 0 && ret_used_pin) | |
263 | *ret_used_pin = NULL; | |
839fddbe | 264 | |
0ff60566 OK |
265 | if (r != -ENOANO) /* pin required */ |
266 | return r; | |
839fddbe LP |
267 | |
268 | token_uri_escaped = cescape(token_uri_string); | |
269 | if (!token_uri_escaped) | |
270 | return log_oom(); | |
271 | ||
272 | id = strjoin("pkcs11:", token_uri_escaped); | |
273 | if (!id) | |
274 | return log_oom(); | |
275 | ||
276 | for (unsigned tries = 0; tries < 3; tries++) { | |
277 | _cleanup_strv_free_erase_ char **passwords = NULL; | |
e99ca147 | 278 | _cleanup_(erase_and_freep) char *envpin = NULL; |
e99ca147 LP |
279 | |
280 | r = getenv_steal_erase("PIN", &envpin); | |
281 | if (r < 0) | |
282 | return log_error_errno(r, "Failed to acquire PIN from environment: %m"); | |
283 | if (r > 0) { | |
284 | passwords = strv_new(envpin); | |
839fddbe LP |
285 | if (!passwords) |
286 | return log_oom(); | |
287 | ||
cd5f57bd LB |
288 | } else if (headless) |
289 | return log_error_errno(SYNTHETIC_ERRNO(ENOPKG), "PIN querying disabled via 'headless' option. Use the 'PIN' environment variable."); | |
290 | else { | |
c63ec11b LP |
291 | _cleanup_free_ char *text = NULL; |
292 | ||
293 | if (FLAGS_SET(token_info->flags, CKF_USER_PIN_FINAL_TRY)) | |
294 | r = asprintf(&text, | |
295 | "Please enter correct PIN for security token '%s' in order to unlock %s (final try):", | |
296 | token_label, friendly_name); | |
297 | else if (FLAGS_SET(token_info->flags, CKF_USER_PIN_COUNT_LOW)) | |
298 | r = asprintf(&text, | |
299 | "PIN has been entered incorrectly previously, please enter correct PIN for security token '%s' in order to unlock %s:", | |
300 | token_label, friendly_name); | |
301 | else if (tries == 0) | |
302 | r = asprintf(&text, | |
303 | "Please enter PIN for security token '%s' in order to unlock %s:", | |
304 | token_label, friendly_name); | |
305 | else | |
306 | r = asprintf(&text, | |
307 | "Please enter PIN for security token '%s' in order to unlock %s (try #%u):", | |
308 | token_label, friendly_name, tries+1); | |
309 | if (r < 0) | |
310 | return log_oom(); | |
311 | ||
839fddbe | 312 | /* We never cache PINs, simply because it's fatal if we use wrong PINs, since usually there are only 3 tries */ |
8806bb4b | 313 | r = ask_password_auto(text, icon_name, id, key_name, credential_name, until, 0, &passwords); |
839fddbe LP |
314 | if (r < 0) |
315 | return log_error_errno(r, "Failed to query PIN for security token '%s': %m", token_label); | |
316 | } | |
317 | ||
318 | STRV_FOREACH(i, passwords) { | |
0ff60566 OK |
319 | r = pkcs11_token_login_by_pin(m, session, token_info, token_label, *i, strlen(*i)); |
320 | if (r == 0 && ret_used_pin) { | |
321 | char *c; | |
839fddbe | 322 | |
0ff60566 OK |
323 | c = strdup(*i); |
324 | if (!c) | |
325 | return log_oom(); | |
839fddbe | 326 | |
0ff60566 | 327 | *ret_used_pin = c; |
839fddbe | 328 | } |
0ff60566 OK |
329 | |
330 | if (r != -ENOLCK) | |
331 | return r; | |
839fddbe LP |
332 | |
333 | /* Referesh the token info, so that we can prompt knowing the new flags if they changed. */ | |
334 | rv = m->C_GetTokenInfo(slotid, &updated_token_info); | |
335 | if (rv != CKR_OK) | |
336 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
337 | "Failed to acquire updated security token information for slot %lu: %s", | |
338 | slotid, p11_kit_strerror(rv)); | |
339 | ||
340 | token_info = &updated_token_info; | |
839fddbe LP |
341 | } |
342 | } | |
343 | ||
344 | return log_error_errno(SYNTHETIC_ERRNO(EPERM), "Too many attempts to log into token '%s'.", token_label); | |
345 | } | |
346 | ||
347 | int pkcs11_token_find_x509_certificate( | |
348 | CK_FUNCTION_LIST *m, | |
349 | CK_SESSION_HANDLE session, | |
350 | P11KitUri *search_uri, | |
351 | CK_OBJECT_HANDLE *ret_object) { | |
352 | ||
353 | bool found_class = false, found_certificate_type = false; | |
354 | _cleanup_free_ CK_ATTRIBUTE *attributes_buffer = NULL; | |
355 | CK_ULONG n_attributes, a, n_objects; | |
356 | CK_ATTRIBUTE *attributes = NULL; | |
357 | CK_OBJECT_HANDLE objects[2]; | |
358 | CK_RV rv, rv2; | |
359 | ||
360 | assert(m); | |
361 | assert(search_uri); | |
362 | assert(ret_object); | |
363 | ||
364 | attributes = p11_kit_uri_get_attributes(search_uri, &n_attributes); | |
365 | for (a = 0; a < n_attributes; a++) { | |
366 | ||
367 | /* We use the URI's included match attributes, but make them more strict. This allows users | |
368 | * to specify a token URL instead of an object URL and the right thing should happen if | |
369 | * there's only one suitable key on the token. */ | |
370 | ||
371 | switch (attributes[a].type) { | |
372 | ||
373 | case CKA_CLASS: { | |
374 | CK_OBJECT_CLASS c; | |
375 | ||
376 | if (attributes[a].ulValueLen != sizeof(c)) | |
377 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid PKCS#11 CKA_CLASS attribute size."); | |
378 | ||
379 | memcpy(&c, attributes[a].pValue, sizeof(c)); | |
380 | if (c != CKO_CERTIFICATE) | |
381 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Selected PKCS#11 object is not an X.509 certificate, refusing."); | |
382 | ||
383 | found_class = true; | |
384 | break; | |
385 | } | |
386 | ||
387 | case CKA_CERTIFICATE_TYPE: { | |
388 | CK_CERTIFICATE_TYPE t; | |
389 | ||
390 | if (attributes[a].ulValueLen != sizeof(t)) | |
391 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid PKCS#11 CKA_CERTIFICATE_TYPE attribute size."); | |
392 | ||
393 | memcpy(&t, attributes[a].pValue, sizeof(t)); | |
394 | if (t != CKC_X_509) | |
395 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Selected PKCS#11 object is not an X.509 certificate, refusing."); | |
396 | ||
397 | found_certificate_type = true; | |
398 | break; | |
399 | }} | |
400 | } | |
401 | ||
402 | if (!found_class || !found_certificate_type) { | |
403 | /* Hmm, let's slightly extend the attribute list we search for */ | |
404 | ||
405 | attributes_buffer = new(CK_ATTRIBUTE, n_attributes + !found_class + !found_certificate_type); | |
406 | if (!attributes_buffer) | |
407 | return log_oom(); | |
408 | ||
409 | memcpy(attributes_buffer, attributes, sizeof(CK_ATTRIBUTE) * n_attributes); | |
410 | ||
411 | if (!found_class) { | |
412 | static const CK_OBJECT_CLASS class = CKO_CERTIFICATE; | |
413 | ||
414 | attributes_buffer[n_attributes++] = (CK_ATTRIBUTE) { | |
415 | .type = CKA_CLASS, | |
416 | .pValue = (CK_OBJECT_CLASS*) &class, | |
417 | .ulValueLen = sizeof(class), | |
418 | }; | |
419 | } | |
420 | ||
421 | if (!found_certificate_type) { | |
422 | static const CK_CERTIFICATE_TYPE type = CKC_X_509; | |
423 | ||
424 | attributes_buffer[n_attributes++] = (CK_ATTRIBUTE) { | |
425 | .type = CKA_CERTIFICATE_TYPE, | |
426 | .pValue = (CK_CERTIFICATE_TYPE*) &type, | |
427 | .ulValueLen = sizeof(type), | |
428 | }; | |
429 | } | |
430 | ||
431 | attributes = attributes_buffer; | |
432 | } | |
433 | ||
434 | rv = m->C_FindObjectsInit(session, attributes, n_attributes); | |
435 | if (rv != CKR_OK) | |
436 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
437 | "Failed to initialize object find call: %s", p11_kit_strerror(rv)); | |
438 | ||
439 | rv = m->C_FindObjects(session, objects, ELEMENTSOF(objects), &n_objects); | |
440 | rv2 = m->C_FindObjectsFinal(session); | |
441 | if (rv != CKR_OK) | |
442 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
443 | "Failed to find objects: %s", p11_kit_strerror(rv)); | |
444 | if (rv2 != CKR_OK) | |
445 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
446 | "Failed to finalize object find call: %s", p11_kit_strerror(rv)); | |
447 | if (n_objects == 0) | |
448 | return log_error_errno(SYNTHETIC_ERRNO(ENOENT), | |
449 | "Failed to find selected X509 certificate on token."); | |
450 | if (n_objects > 1) | |
451 | return log_error_errno(SYNTHETIC_ERRNO(ENOTUNIQ), | |
452 | "Configured URI matches multiple certificates, refusing."); | |
453 | ||
454 | *ret_object = objects[0]; | |
455 | return 0; | |
456 | } | |
457 | ||
458 | #if HAVE_OPENSSL | |
459 | int pkcs11_token_read_x509_certificate( | |
460 | CK_FUNCTION_LIST *m, | |
461 | CK_SESSION_HANDLE session, | |
462 | CK_OBJECT_HANDLE object, | |
463 | X509 **ret_cert) { | |
464 | ||
465 | _cleanup_free_ void *buffer = NULL; | |
466 | _cleanup_free_ char *t = NULL; | |
467 | CK_ATTRIBUTE attribute = { | |
468 | .type = CKA_VALUE | |
469 | }; | |
470 | CK_RV rv; | |
471 | _cleanup_(X509_freep) X509 *x509 = NULL; | |
472 | X509_NAME *name = NULL; | |
473 | const unsigned char *p; | |
474 | ||
475 | rv = m->C_GetAttributeValue(session, object, &attribute, 1); | |
476 | if (rv != CKR_OK) | |
477 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
478 | "Failed to read X.509 certificate size off token: %s", p11_kit_strerror(rv)); | |
479 | ||
480 | buffer = malloc(attribute.ulValueLen); | |
481 | if (!buffer) | |
482 | return log_oom(); | |
483 | ||
484 | attribute.pValue = buffer; | |
485 | ||
486 | rv = m->C_GetAttributeValue(session, object, &attribute, 1); | |
487 | if (rv != CKR_OK) | |
488 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
489 | "Failed to read X.509 certificate data off token: %s", p11_kit_strerror(rv)); | |
490 | ||
491 | p = attribute.pValue; | |
492 | x509 = d2i_X509(NULL, &p, attribute.ulValueLen); | |
493 | if (!x509) | |
494 | return log_error_errno(SYNTHETIC_ERRNO(EBADMSG), "Failed parse X.509 certificate."); | |
495 | ||
496 | name = X509_get_subject_name(x509); | |
497 | if (!name) | |
498 | return log_error_errno(SYNTHETIC_ERRNO(EBADMSG), "Failed to acquire X.509 subject name."); | |
499 | ||
500 | t = X509_NAME_oneline(name, NULL, 0); | |
501 | if (!t) | |
502 | return log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to format X.509 subject name as string."); | |
503 | ||
504 | log_debug("Using X.509 certificate issued for '%s'.", t); | |
505 | ||
506 | *ret_cert = TAKE_PTR(x509); | |
507 | return 0; | |
508 | } | |
509 | #endif | |
510 | ||
511 | int pkcs11_token_find_private_key( | |
512 | CK_FUNCTION_LIST *m, | |
513 | CK_SESSION_HANDLE session, | |
514 | P11KitUri *search_uri, | |
515 | CK_OBJECT_HANDLE *ret_object) { | |
516 | ||
517 | bool found_decrypt = false, found_class = false, found_key_type = false; | |
518 | _cleanup_free_ CK_ATTRIBUTE *attributes_buffer = NULL; | |
519 | CK_ULONG n_attributes, a, n_objects; | |
520 | CK_ATTRIBUTE *attributes = NULL; | |
521 | CK_OBJECT_HANDLE objects[2]; | |
522 | CK_RV rv, rv2; | |
523 | ||
524 | assert(m); | |
525 | assert(search_uri); | |
526 | assert(ret_object); | |
527 | ||
528 | attributes = p11_kit_uri_get_attributes(search_uri, &n_attributes); | |
529 | for (a = 0; a < n_attributes; a++) { | |
530 | ||
531 | /* We use the URI's included match attributes, but make them more strict. This allows users | |
532 | * to specify a token URL instead of an object URL and the right thing should happen if | |
533 | * there's only one suitable key on the token. */ | |
534 | ||
535 | switch (attributes[a].type) { | |
536 | ||
537 | case CKA_CLASS: { | |
538 | CK_OBJECT_CLASS c; | |
539 | ||
540 | if (attributes[a].ulValueLen != sizeof(c)) | |
541 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid PKCS#11 CKA_CLASS attribute size."); | |
542 | ||
543 | memcpy(&c, attributes[a].pValue, sizeof(c)); | |
544 | if (c != CKO_PRIVATE_KEY) | |
545 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
546 | "Selected PKCS#11 object is not a private key, refusing."); | |
547 | ||
548 | found_class = true; | |
549 | break; | |
550 | } | |
551 | ||
552 | case CKA_DECRYPT: { | |
553 | CK_BBOOL b; | |
554 | ||
555 | if (attributes[a].ulValueLen != sizeof(b)) | |
556 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid PKCS#11 CKA_DECRYPT attribute size."); | |
557 | ||
558 | memcpy(&b, attributes[a].pValue, sizeof(b)); | |
559 | if (!b) | |
560 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
561 | "Selected PKCS#11 object is not suitable for decryption, refusing."); | |
562 | ||
563 | found_decrypt = true; | |
564 | break; | |
565 | } | |
566 | ||
567 | case CKA_KEY_TYPE: { | |
568 | CK_KEY_TYPE t; | |
569 | ||
570 | if (attributes[a].ulValueLen != sizeof(t)) | |
571 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid PKCS#11 CKA_KEY_TYPE attribute size."); | |
572 | ||
573 | memcpy(&t, attributes[a].pValue, sizeof(t)); | |
574 | if (t != CKK_RSA) | |
575 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Selected PKCS#11 object is not an RSA key, refusing."); | |
576 | ||
577 | found_key_type = true; | |
578 | break; | |
579 | }} | |
580 | } | |
581 | ||
582 | if (!found_decrypt || !found_class || !found_key_type) { | |
583 | /* Hmm, let's slightly extend the attribute list we search for */ | |
584 | ||
585 | attributes_buffer = new(CK_ATTRIBUTE, n_attributes + !found_decrypt + !found_class + !found_key_type); | |
586 | if (!attributes_buffer) | |
587 | return log_oom(); | |
588 | ||
589 | memcpy(attributes_buffer, attributes, sizeof(CK_ATTRIBUTE) * n_attributes); | |
590 | ||
591 | if (!found_decrypt) { | |
592 | static const CK_BBOOL yes = true; | |
593 | ||
594 | attributes_buffer[n_attributes++] = (CK_ATTRIBUTE) { | |
595 | .type = CKA_DECRYPT, | |
596 | .pValue = (CK_BBOOL*) &yes, | |
597 | .ulValueLen = sizeof(yes), | |
598 | }; | |
599 | } | |
600 | ||
601 | if (!found_class) { | |
602 | static const CK_OBJECT_CLASS class = CKO_PRIVATE_KEY; | |
603 | ||
604 | attributes_buffer[n_attributes++] = (CK_ATTRIBUTE) { | |
605 | .type = CKA_CLASS, | |
606 | .pValue = (CK_OBJECT_CLASS*) &class, | |
607 | .ulValueLen = sizeof(class), | |
608 | }; | |
609 | } | |
610 | ||
611 | if (!found_key_type) { | |
612 | static const CK_KEY_TYPE type = CKK_RSA; | |
613 | ||
614 | attributes_buffer[n_attributes++] = (CK_ATTRIBUTE) { | |
615 | .type = CKA_KEY_TYPE, | |
616 | .pValue = (CK_KEY_TYPE*) &type, | |
617 | .ulValueLen = sizeof(type), | |
618 | }; | |
619 | } | |
620 | ||
621 | attributes = attributes_buffer; | |
622 | } | |
623 | ||
624 | rv = m->C_FindObjectsInit(session, attributes, n_attributes); | |
625 | if (rv != CKR_OK) | |
626 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
627 | "Failed to initialize object find call: %s", p11_kit_strerror(rv)); | |
628 | ||
629 | rv = m->C_FindObjects(session, objects, ELEMENTSOF(objects), &n_objects); | |
630 | rv2 = m->C_FindObjectsFinal(session); | |
631 | if (rv != CKR_OK) | |
632 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
633 | "Failed to find objects: %s", p11_kit_strerror(rv)); | |
634 | if (rv2 != CKR_OK) | |
635 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
636 | "Failed to finalize object find call: %s", p11_kit_strerror(rv)); | |
637 | if (n_objects == 0) | |
638 | return log_error_errno(SYNTHETIC_ERRNO(ENOENT), | |
639 | "Failed to find selected private key suitable for decryption on token."); | |
640 | if (n_objects > 1) | |
641 | return log_error_errno(SYNTHETIC_ERRNO(ENOTUNIQ), | |
642 | "Configured private key URI matches multiple keys, refusing."); | |
643 | ||
644 | *ret_object = objects[0]; | |
645 | return 0; | |
646 | } | |
647 | ||
648 | int pkcs11_token_decrypt_data( | |
649 | CK_FUNCTION_LIST *m, | |
650 | CK_SESSION_HANDLE session, | |
651 | CK_OBJECT_HANDLE object, | |
652 | const void *encrypted_data, | |
653 | size_t encrypted_data_size, | |
654 | void **ret_decrypted_data, | |
655 | size_t *ret_decrypted_data_size) { | |
656 | ||
657 | static const CK_MECHANISM mechanism = { | |
658 | .mechanism = CKM_RSA_PKCS | |
659 | }; | |
660 | _cleanup_(erase_and_freep) CK_BYTE *dbuffer = NULL; | |
661 | CK_ULONG dbuffer_size = 0; | |
662 | CK_RV rv; | |
663 | ||
664 | assert(m); | |
665 | assert(encrypted_data); | |
666 | assert(encrypted_data_size > 0); | |
667 | assert(ret_decrypted_data); | |
668 | assert(ret_decrypted_data_size); | |
669 | ||
670 | rv = m->C_DecryptInit(session, (CK_MECHANISM*) &mechanism, object); | |
671 | if (rv != CKR_OK) | |
672 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
673 | "Failed to initialize decryption on security token: %s", p11_kit_strerror(rv)); | |
674 | ||
675 | dbuffer_size = encrypted_data_size; /* Start with something reasonable */ | |
676 | dbuffer = malloc(dbuffer_size); | |
677 | if (!dbuffer) | |
678 | return log_oom(); | |
679 | ||
680 | rv = m->C_Decrypt(session, (CK_BYTE*) encrypted_data, encrypted_data_size, dbuffer, &dbuffer_size); | |
681 | if (rv == CKR_BUFFER_TOO_SMALL) { | |
682 | erase_and_free(dbuffer); | |
683 | ||
684 | dbuffer = malloc(dbuffer_size); | |
685 | if (!dbuffer) | |
686 | return log_oom(); | |
687 | ||
688 | rv = m->C_Decrypt(session, (CK_BYTE*) encrypted_data, encrypted_data_size, dbuffer, &dbuffer_size); | |
689 | } | |
690 | if (rv != CKR_OK) | |
691 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
692 | "Failed to decrypt key on security token: %s", p11_kit_strerror(rv)); | |
693 | ||
694 | log_info("Successfully decrypted key with security token."); | |
695 | ||
696 | *ret_decrypted_data = TAKE_PTR(dbuffer); | |
697 | *ret_decrypted_data_size = dbuffer_size; | |
698 | return 0; | |
699 | } | |
700 | ||
701 | int pkcs11_token_acquire_rng( | |
702 | CK_FUNCTION_LIST *m, | |
703 | CK_SESSION_HANDLE session) { | |
704 | ||
705 | _cleanup_free_ void *buffer = NULL; | |
839fddbe LP |
706 | size_t rps; |
707 | CK_RV rv; | |
708 | int r; | |
709 | ||
710 | assert(m); | |
711 | ||
712 | /* While we are at it, let's read some RNG data from the PKCS#11 token and pass it to the kernel | |
713 | * random pool. This should be cheap if we are talking to the device already. Note that we don't | |
714 | * credit any entropy, since we don't know about the quality of the pkcs#11 token's RNG. Why bother | |
715 | * at all? There are two sides to the argument whether to generate private keys on tokens or on the | |
716 | * host. By crediting some data from the token RNG to the host's pool we at least can say that any | |
717 | * key generated from it is at least as good as both sources individually. */ | |
718 | ||
719 | rps = random_pool_size(); | |
720 | ||
721 | buffer = malloc(rps); | |
722 | if (!buffer) | |
723 | return log_oom(); | |
724 | ||
725 | rv = m->C_GenerateRandom(session, buffer, rps); | |
726 | if (rv != CKR_OK) | |
727 | return log_debug_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), | |
728 | "Failed to generate RNG data on security token: %s", p11_kit_strerror(rv)); | |
729 | ||
61bd7d1e | 730 | r = random_write_entropy(-1, buffer, rps, false); |
839fddbe LP |
731 | if (r < 0) |
732 | return log_debug_errno(r, "Failed to write PKCS#11 acquired random data to /dev/urandom: %m"); | |
733 | ||
734 | log_debug("Successfully written %zu bytes random data acquired via PKCS#11 to kernel random pool.", rps); | |
735 | ||
736 | return 0; | |
737 | } | |
738 | ||
739 | static int token_process( | |
740 | CK_FUNCTION_LIST *m, | |
741 | CK_SLOT_ID slotid, | |
742 | const CK_SLOT_INFO *slot_info, | |
743 | const CK_TOKEN_INFO *token_info, | |
744 | P11KitUri *search_uri, | |
745 | pkcs11_find_token_callback_t callback, | |
746 | void *userdata) { | |
747 | ||
748 | _cleanup_free_ char *token_label = NULL; | |
749 | CK_SESSION_HANDLE session; | |
750 | CK_RV rv; | |
751 | int r; | |
752 | ||
753 | assert(m); | |
754 | assert(slot_info); | |
755 | assert(token_info); | |
839fddbe LP |
756 | |
757 | token_label = pkcs11_token_label(token_info); | |
758 | if (!token_label) | |
759 | return log_oom(); | |
760 | ||
761 | rv = m->C_OpenSession(slotid, CKF_SERIAL_SESSION, NULL, NULL, &session); | |
762 | if (rv != CKR_OK) | |
763 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
764 | "Failed to create session for security token '%s': %s", token_label, p11_kit_strerror(rv)); | |
765 | ||
766 | if (callback) | |
767 | r = callback(m, session, slotid, slot_info, token_info, search_uri, userdata); | |
768 | else | |
769 | r = 1; /* if not callback was specified, just say we found what we were looking for */ | |
770 | ||
771 | rv = m->C_CloseSession(session); | |
772 | if (rv != CKR_OK) | |
773 | log_warning("Failed to close session on PKCS#11 token, ignoring: %s", p11_kit_strerror(rv)); | |
774 | ||
775 | return r; | |
776 | } | |
777 | ||
778 | static int slot_process( | |
779 | CK_FUNCTION_LIST *m, | |
780 | CK_SLOT_ID slotid, | |
781 | P11KitUri *search_uri, | |
782 | pkcs11_find_token_callback_t callback, | |
783 | void *userdata) { | |
784 | ||
785 | _cleanup_(p11_kit_uri_freep) P11KitUri* slot_uri = NULL, *token_uri = NULL; | |
786 | _cleanup_free_ char *token_uri_string = NULL; | |
787 | CK_TOKEN_INFO token_info; | |
788 | CK_SLOT_INFO slot_info; | |
789 | int uri_result; | |
790 | CK_RV rv; | |
791 | ||
792 | assert(m); | |
839fddbe LP |
793 | |
794 | /* We return -EAGAIN for all failures we can attribute to a specific slot in some way, so that the | |
795 | * caller might try other slots before giving up. */ | |
796 | ||
797 | rv = m->C_GetSlotInfo(slotid, &slot_info); | |
798 | if (rv != CKR_OK) { | |
799 | log_warning("Failed to acquire slot info for slot %lu, ignoring slot: %s", slotid, p11_kit_strerror(rv)); | |
800 | return -EAGAIN; | |
801 | } | |
802 | ||
803 | slot_uri = uri_from_slot_info(&slot_info); | |
804 | if (!slot_uri) | |
805 | return log_oom(); | |
806 | ||
807 | if (DEBUG_LOGGING) { | |
808 | _cleanup_free_ char *slot_uri_string = NULL; | |
809 | ||
810 | uri_result = p11_kit_uri_format(slot_uri, P11_KIT_URI_FOR_ANY, &slot_uri_string); | |
811 | if (uri_result != P11_KIT_URI_OK) { | |
812 | log_warning("Failed to format slot URI, ignoring slot: %s", p11_kit_uri_message(uri_result)); | |
813 | return -EAGAIN; | |
814 | } | |
815 | ||
816 | log_debug("Found slot with URI %s", slot_uri_string); | |
817 | } | |
818 | ||
819 | rv = m->C_GetTokenInfo(slotid, &token_info); | |
820 | if (rv == CKR_TOKEN_NOT_PRESENT) { | |
d7a0f1f4 FS |
821 | return log_debug_errno(SYNTHETIC_ERRNO(EAGAIN), |
822 | "Token not present in slot, ignoring."); | |
839fddbe LP |
823 | } else if (rv != CKR_OK) { |
824 | log_warning("Failed to acquire token info for slot %lu, ignoring slot: %s", slotid, p11_kit_strerror(rv)); | |
825 | return -EAGAIN; | |
826 | } | |
827 | ||
828 | token_uri = uri_from_token_info(&token_info); | |
829 | if (!token_uri) | |
830 | return log_oom(); | |
831 | ||
832 | uri_result = p11_kit_uri_format(token_uri, P11_KIT_URI_FOR_ANY, &token_uri_string); | |
833 | if (uri_result != P11_KIT_URI_OK) { | |
834 | log_warning("Failed to format slot URI: %s", p11_kit_uri_message(uri_result)); | |
835 | return -EAGAIN; | |
836 | } | |
837 | ||
d7a0f1f4 FS |
838 | if (search_uri && !p11_kit_uri_match_token_info(search_uri, &token_info)) |
839 | return log_debug_errno(SYNTHETIC_ERRNO(EAGAIN), | |
840 | "Found non-matching token with URI %s.", | |
841 | token_uri_string); | |
839fddbe LP |
842 | |
843 | log_debug("Found matching token with URI %s.", token_uri_string); | |
844 | ||
845 | return token_process( | |
846 | m, | |
847 | slotid, | |
848 | &slot_info, | |
849 | &token_info, | |
850 | search_uri, | |
851 | callback, | |
852 | userdata); | |
853 | } | |
854 | ||
855 | static int module_process( | |
856 | CK_FUNCTION_LIST *m, | |
857 | P11KitUri *search_uri, | |
858 | pkcs11_find_token_callback_t callback, | |
859 | void *userdata) { | |
860 | ||
861 | _cleanup_free_ char *name = NULL, *module_uri_string = NULL; | |
862 | _cleanup_(p11_kit_uri_freep) P11KitUri* module_uri = NULL; | |
863 | _cleanup_free_ CK_SLOT_ID *slotids = NULL; | |
864 | CK_ULONG n_slotids = 0; | |
865 | int uri_result; | |
866 | CK_INFO info; | |
867 | size_t k; | |
868 | CK_RV rv; | |
869 | int r; | |
870 | ||
871 | assert(m); | |
839fddbe LP |
872 | |
873 | /* We ignore most errors from modules here, in order to skip over faulty modules: one faulty module | |
874 | * should not have the effect that we don't try the others anymore. We indicate such per-module | |
875 | * failures with -EAGAIN, which let's the caller try the next module. */ | |
876 | ||
877 | name = p11_kit_module_get_name(m); | |
878 | if (!name) | |
879 | return log_oom(); | |
880 | ||
881 | log_debug("Trying PKCS#11 module %s.", name); | |
882 | ||
883 | rv = m->C_GetInfo(&info); | |
884 | if (rv != CKR_OK) { | |
885 | log_warning("Failed to get info on PKCS#11 module, ignoring module: %s", p11_kit_strerror(rv)); | |
886 | return -EAGAIN; | |
887 | } | |
888 | ||
889 | module_uri = uri_from_module_info(&info); | |
890 | if (!module_uri) | |
891 | return log_oom(); | |
892 | ||
893 | uri_result = p11_kit_uri_format(module_uri, P11_KIT_URI_FOR_ANY, &module_uri_string); | |
894 | if (uri_result != P11_KIT_URI_OK) { | |
895 | log_warning("Failed to format module URI, ignoring module: %s", p11_kit_uri_message(uri_result)); | |
896 | return -EAGAIN; | |
897 | } | |
898 | ||
899 | log_debug("Found module with URI %s", module_uri_string); | |
900 | ||
901 | rv = pkcs11_get_slot_list_malloc(m, &slotids, &n_slotids); | |
902 | if (rv != CKR_OK) { | |
903 | log_warning("Failed to get slot list, ignoring module: %s", p11_kit_strerror(rv)); | |
904 | return -EAGAIN; | |
905 | } | |
d7a0f1f4 FS |
906 | if (n_slotids == 0) |
907 | return log_debug_errno(SYNTHETIC_ERRNO(EAGAIN), | |
908 | "This module has no slots? Ignoring module."); | |
839fddbe LP |
909 | |
910 | for (k = 0; k < n_slotids; k++) { | |
911 | r = slot_process( | |
912 | m, | |
913 | slotids[k], | |
914 | search_uri, | |
915 | callback, | |
916 | userdata); | |
917 | if (r != -EAGAIN) | |
918 | return r; | |
919 | } | |
920 | ||
921 | return -EAGAIN; | |
922 | } | |
923 | ||
924 | int pkcs11_find_token( | |
925 | const char *pkcs11_uri, | |
926 | pkcs11_find_token_callback_t callback, | |
927 | void *userdata) { | |
928 | ||
929 | _cleanup_(p11_kit_modules_finalize_and_releasep) CK_FUNCTION_LIST **modules = NULL; | |
930 | _cleanup_(p11_kit_uri_freep) P11KitUri *search_uri = NULL; | |
931 | int r; | |
932 | ||
839fddbe LP |
933 | /* Execute the specified callback for each matching token found. If nothing is found returns |
934 | * -EAGAIN. Logs about all errors, except for EAGAIN, which the caller has to log about. */ | |
935 | ||
0eb3be46 LP |
936 | if (pkcs11_uri) { |
937 | r = uri_from_string(pkcs11_uri, &search_uri); | |
938 | if (r < 0) | |
939 | return log_error_errno(r, "Failed to parse PKCS#11 URI '%s': %m", pkcs11_uri); | |
940 | } | |
839fddbe LP |
941 | |
942 | modules = p11_kit_modules_load_and_initialize(0); | |
943 | if (!modules) | |
944 | return log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to initialize pkcs11 modules"); | |
945 | ||
946 | for (CK_FUNCTION_LIST **i = modules; *i; i++) { | |
947 | r = module_process( | |
948 | *i, | |
949 | search_uri, | |
950 | callback, | |
951 | userdata); | |
952 | if (r != -EAGAIN) | |
953 | return r; | |
954 | } | |
955 | ||
956 | return -EAGAIN; | |
957 | } | |
958 | ||
2289a784 LP |
959 | #if HAVE_OPENSSL |
960 | struct pkcs11_acquire_certificate_callback_data { | |
961 | char *pin_used; | |
962 | X509 *cert; | |
963 | const char *askpw_friendly_name, *askpw_icon_name; | |
964 | }; | |
965 | ||
966 | static void pkcs11_acquire_certificate_callback_data_release(struct pkcs11_acquire_certificate_callback_data *data) { | |
967 | erase_and_free(data->pin_used); | |
968 | X509_free(data->cert); | |
969 | } | |
970 | ||
971 | static int pkcs11_acquire_certificate_callback( | |
972 | CK_FUNCTION_LIST *m, | |
973 | CK_SESSION_HANDLE session, | |
974 | CK_SLOT_ID slot_id, | |
975 | const CK_SLOT_INFO *slot_info, | |
976 | const CK_TOKEN_INFO *token_info, | |
977 | P11KitUri *uri, | |
978 | void *userdata) { | |
979 | ||
980 | _cleanup_(erase_and_freep) char *pin_used = NULL; | |
99534007 | 981 | struct pkcs11_acquire_certificate_callback_data *data = ASSERT_PTR(userdata); |
2289a784 LP |
982 | CK_OBJECT_HANDLE object; |
983 | int r; | |
984 | ||
985 | assert(m); | |
986 | assert(slot_info); | |
987 | assert(token_info); | |
988 | assert(uri); | |
2289a784 LP |
989 | |
990 | /* Called for every token matching our URI */ | |
991 | ||
cd5f57bd | 992 | r = pkcs11_token_login(m, session, slot_id, token_info, data->askpw_friendly_name, data->askpw_icon_name, "pkcs11-pin", "pkcs11-pin", UINT64_MAX, false, &pin_used); |
2289a784 LP |
993 | if (r < 0) |
994 | return r; | |
995 | ||
996 | r = pkcs11_token_find_x509_certificate(m, session, uri, &object); | |
997 | if (r < 0) | |
998 | return r; | |
999 | ||
1000 | r = pkcs11_token_read_x509_certificate(m, session, object, &data->cert); | |
1001 | if (r < 0) | |
1002 | return r; | |
1003 | ||
1004 | /* Let's read some random data off the token and write it to the kernel pool before we generate our | |
1005 | * random key from it. This way we can claim the quality of the RNG is at least as good as the | |
1006 | * kernel's and the token's pool */ | |
1007 | (void) pkcs11_token_acquire_rng(m, session); | |
1008 | ||
1009 | data->pin_used = TAKE_PTR(pin_used); | |
1010 | return 1; | |
1011 | } | |
1012 | ||
1013 | int pkcs11_acquire_certificate( | |
1014 | const char *uri, | |
1015 | const char *askpw_friendly_name, | |
1016 | const char *askpw_icon_name, | |
1017 | X509 **ret_cert, | |
1018 | char **ret_pin_used) { | |
1019 | ||
1020 | _cleanup_(pkcs11_acquire_certificate_callback_data_release) struct pkcs11_acquire_certificate_callback_data data = { | |
1021 | .askpw_friendly_name = askpw_friendly_name, | |
1022 | .askpw_icon_name = askpw_icon_name, | |
1023 | }; | |
1024 | int r; | |
1025 | ||
1026 | assert(uri); | |
1027 | assert(ret_cert); | |
1028 | ||
1029 | r = pkcs11_find_token(uri, pkcs11_acquire_certificate_callback, &data); | |
1030 | if (r == -EAGAIN) /* pkcs11_find_token() doesn't log about this error, but all others */ | |
1031 | return log_error_errno(SYNTHETIC_ERRNO(ENXIO), | |
1032 | "Specified PKCS#11 token with URI '%s' not found.", | |
1033 | uri); | |
1034 | if (r < 0) | |
1035 | return r; | |
1036 | ||
1037 | *ret_cert = TAKE_PTR(data.cert); | |
1038 | ||
1039 | if (ret_pin_used) | |
1040 | *ret_pin_used = TAKE_PTR(data.pin_used); | |
1041 | ||
1042 | return 0; | |
1043 | } | |
f240cbb6 LP |
1044 | #endif |
1045 | ||
1046 | static int list_callback( | |
1047 | CK_FUNCTION_LIST *m, | |
1048 | CK_SESSION_HANDLE session, | |
1049 | CK_SLOT_ID slot_id, | |
1050 | const CK_SLOT_INFO *slot_info, | |
1051 | const CK_TOKEN_INFO *token_info, | |
1052 | P11KitUri *uri, | |
1053 | void *userdata) { | |
1054 | ||
1055 | _cleanup_free_ char *token_uri_string = NULL, *token_label = NULL, *token_manufacturer_id = NULL, *token_model = NULL; | |
1056 | _cleanup_(p11_kit_uri_freep) P11KitUri *token_uri = NULL; | |
1057 | Table *t = userdata; | |
1058 | int uri_result, r; | |
1059 | ||
1060 | assert(slot_info); | |
1061 | assert(token_info); | |
1062 | ||
1063 | /* We only care about hardware devices here with a token inserted. Let's filter everything else | |
1064 | * out. (Note that the user can explicitly specify non-hardware tokens if they like, but during | |
1065 | * enumeration we'll filter those, since software tokens are typically the system certificate store | |
1066 | * and such, and it's typically not what people want to bind their home directories to.) */ | |
1067 | if (!FLAGS_SET(token_info->flags, CKF_HW_SLOT|CKF_TOKEN_PRESENT)) | |
1068 | return -EAGAIN; | |
1069 | ||
1070 | token_label = pkcs11_token_label(token_info); | |
1071 | if (!token_label) | |
1072 | return log_oom(); | |
1073 | ||
1074 | token_manufacturer_id = pkcs11_token_manufacturer_id(token_info); | |
1075 | if (!token_manufacturer_id) | |
1076 | return log_oom(); | |
1077 | ||
1078 | token_model = pkcs11_token_model(token_info); | |
1079 | if (!token_model) | |
1080 | return log_oom(); | |
1081 | ||
1082 | token_uri = uri_from_token_info(token_info); | |
1083 | if (!token_uri) | |
1084 | return log_oom(); | |
1085 | ||
1086 | uri_result = p11_kit_uri_format(token_uri, P11_KIT_URI_FOR_ANY, &token_uri_string); | |
1087 | if (uri_result != P11_KIT_URI_OK) | |
1088 | return log_warning_errno(SYNTHETIC_ERRNO(EAGAIN), "Failed to format slot URI: %s", p11_kit_uri_message(uri_result)); | |
1089 | ||
1090 | r = table_add_many( | |
1091 | t, | |
1092 | TABLE_STRING, token_uri_string, | |
1093 | TABLE_STRING, token_label, | |
1094 | TABLE_STRING, token_manufacturer_id, | |
1095 | TABLE_STRING, token_model); | |
1096 | if (r < 0) | |
1097 | return table_log_add_error(r); | |
1098 | ||
1099 | return -EAGAIN; /* keep scanning */ | |
1100 | } | |
1101 | #endif | |
1102 | ||
1103 | int pkcs11_list_tokens(void) { | |
1104 | #if HAVE_P11KIT | |
1105 | _cleanup_(table_unrefp) Table *t = NULL; | |
1106 | int r; | |
1107 | ||
1108 | t = table_new("uri", "label", "manufacturer", "model"); | |
1109 | if (!t) | |
1110 | return log_oom(); | |
1111 | ||
1112 | r = pkcs11_find_token(NULL, list_callback, t); | |
1113 | if (r < 0 && r != -EAGAIN) | |
1114 | return r; | |
2289a784 | 1115 | |
f240cbb6 LP |
1116 | if (table_get_rows(t) <= 1) { |
1117 | log_info("No suitable PKCS#11 tokens found."); | |
1118 | return 0; | |
1119 | } | |
1120 | ||
1121 | r = table_print(t, stdout); | |
1122 | if (r < 0) | |
1123 | return log_error_errno(r, "Failed to show device table: %m"); | |
1124 | ||
1125 | return 0; | |
1126 | #else | |
1127 | return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), | |
1128 | "PKCS#11 tokens not supported on this build."); | |
1129 | #endif | |
1130 | } | |
1131 | ||
1132 | #if HAVE_P11KIT | |
1133 | static int auto_callback( | |
1134 | CK_FUNCTION_LIST *m, | |
1135 | CK_SESSION_HANDLE session, | |
1136 | CK_SLOT_ID slot_id, | |
1137 | const CK_SLOT_INFO *slot_info, | |
1138 | const CK_TOKEN_INFO *token_info, | |
1139 | P11KitUri *uri, | |
1140 | void *userdata) { | |
1141 | ||
1142 | _cleanup_(p11_kit_uri_freep) P11KitUri *token_uri = NULL; | |
1143 | char **t = userdata; | |
1144 | int uri_result; | |
1145 | ||
1146 | assert(slot_info); | |
1147 | assert(token_info); | |
1148 | ||
1149 | if (!FLAGS_SET(token_info->flags, CKF_HW_SLOT|CKF_TOKEN_PRESENT)) | |
1150 | return -EAGAIN; | |
1151 | ||
1152 | if (*t) | |
1153 | return log_error_errno(SYNTHETIC_ERRNO(ENOTUNIQ), | |
1154 | "More than one suitable PKCS#11 token found."); | |
1155 | ||
1156 | token_uri = uri_from_token_info(token_info); | |
1157 | if (!token_uri) | |
1158 | return log_oom(); | |
1159 | ||
1160 | uri_result = p11_kit_uri_format(token_uri, P11_KIT_URI_FOR_ANY, t); | |
1161 | if (uri_result != P11_KIT_URI_OK) | |
1162 | return log_warning_errno(SYNTHETIC_ERRNO(EAGAIN), "Failed to format slot URI: %s", p11_kit_uri_message(uri_result)); | |
1163 | ||
1164 | return 0; | |
1165 | } | |
2289a784 | 1166 | #endif |
f240cbb6 LP |
1167 | |
1168 | int pkcs11_find_token_auto(char **ret) { | |
1169 | #if HAVE_P11KIT | |
1170 | int r; | |
1171 | ||
1172 | r = pkcs11_find_token(NULL, auto_callback, ret); | |
1173 | if (r == -EAGAIN) | |
1174 | return log_error_errno(SYNTHETIC_ERRNO(ENODEV), "No suitable PKCS#11 tokens found."); | |
1175 | if (r < 0) | |
1176 | return r; | |
1177 | ||
1178 | return 0; | |
1179 | #else | |
1180 | return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), | |
1181 | "PKCS#11 tokens not supported on this build."); | |
839fddbe | 1182 | #endif |
f240cbb6 | 1183 | } |
ed3d3af1 OK |
1184 | |
1185 | #if HAVE_P11KIT | |
1186 | void pkcs11_crypt_device_callback_data_release(pkcs11_crypt_device_callback_data *data) { | |
1187 | erase_and_free(data->decrypted_key); | |
1188 | ||
1189 | if (data->free_encrypted_key) | |
1190 | free(data->encrypted_key); | |
1191 | } | |
1192 | ||
1193 | int pkcs11_crypt_device_callback( | |
1194 | CK_FUNCTION_LIST *m, | |
1195 | CK_SESSION_HANDLE session, | |
1196 | CK_SLOT_ID slot_id, | |
1197 | const CK_SLOT_INFO *slot_info, | |
1198 | const CK_TOKEN_INFO *token_info, | |
1199 | P11KitUri *uri, | |
1200 | void *userdata) { | |
1201 | ||
99534007 | 1202 | pkcs11_crypt_device_callback_data *data = ASSERT_PTR(userdata); |
ed3d3af1 OK |
1203 | CK_OBJECT_HANDLE object; |
1204 | int r; | |
1205 | ||
1206 | assert(m); | |
1207 | assert(slot_info); | |
1208 | assert(token_info); | |
1209 | assert(uri); | |
ed3d3af1 OK |
1210 | |
1211 | /* Called for every token matching our URI */ | |
1212 | ||
1213 | r = pkcs11_token_login( | |
1214 | m, | |
1215 | session, | |
1216 | slot_id, | |
1217 | token_info, | |
1218 | data->friendly_name, | |
1219 | "drive-harddisk", | |
1220 | "pkcs11-pin", | |
1221 | "cryptsetup.pkcs11-pin", | |
1222 | data->until, | |
1223 | data->headless, | |
1224 | NULL); | |
1225 | if (r < 0) | |
1226 | return r; | |
1227 | ||
1228 | /* We are likely called during early boot, where entropy is scarce. Mix some data from the PKCS#11 | |
1229 | * token, if it supports that. It should be cheap, given that we already are talking to it anyway and | |
1230 | * shouldn't hurt. */ | |
1231 | (void) pkcs11_token_acquire_rng(m, session); | |
1232 | ||
1233 | r = pkcs11_token_find_private_key(m, session, uri, &object); | |
1234 | if (r < 0) | |
1235 | return r; | |
1236 | ||
1237 | r = pkcs11_token_decrypt_data( | |
1238 | m, | |
1239 | session, | |
1240 | object, | |
1241 | data->encrypted_key, | |
1242 | data->encrypted_key_size, | |
1243 | &data->decrypted_key, | |
1244 | &data->decrypted_key_size); | |
1245 | if (r < 0) | |
1246 | return r; | |
1247 | ||
1248 | return 0; | |
1249 | } | |
1250 | #endif |