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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" | |
da035a3a | 6 | #include "dlfcn-util.h" |
7a6abbe9 | 7 | #include "env-util.h" |
839fddbe LP |
8 | #include "escape.h" |
9 | #include "fd-util.h" | |
f240cbb6 | 10 | #include "format-table.h" |
839fddbe LP |
11 | #include "io-util.h" |
12 | #include "memory-util.h" | |
13 | #if HAVE_OPENSSL | |
14 | #include "openssl-util.h" | |
15 | #endif | |
16 | #include "pkcs11-util.h" | |
17 | #include "random-util.h" | |
18 | #include "string-util.h" | |
19 | #include "strv.h" | |
20 | ||
21 | bool pkcs11_uri_valid(const char *uri) { | |
22 | const char *p; | |
23 | ||
24 | /* A very superficial checker for RFC7512 PKCS#11 URI syntax */ | |
25 | ||
26 | if (isempty(uri)) | |
27 | return false; | |
28 | ||
29 | p = startswith(uri, "pkcs11:"); | |
30 | if (!p) | |
31 | return false; | |
32 | ||
33 | if (isempty(p)) | |
34 | return false; | |
35 | ||
b204bdd4 | 36 | if (!in_charset(p, ALPHANUMERICAL ".~/-_?;&%=")) |
839fddbe LP |
37 | return false; |
38 | ||
39 | return true; | |
40 | } | |
41 | ||
42 | #if HAVE_P11KIT | |
43 | ||
da035a3a LB |
44 | static void *p11kit_dl = NULL; |
45 | ||
46 | char *(*sym_p11_kit_module_get_name)(CK_FUNCTION_LIST *module); | |
47 | void (*sym_p11_kit_modules_finalize_and_release)(CK_FUNCTION_LIST **modules); | |
48 | CK_FUNCTION_LIST **(*sym_p11_kit_modules_load_and_initialize)(int flags); | |
49 | const char *(*sym_p11_kit_strerror)(CK_RV rv); | |
50 | int (*sym_p11_kit_uri_format)(P11KitUri *uri, P11KitUriType uri_type, char **string); | |
51 | void (*sym_p11_kit_uri_free)(P11KitUri *uri); | |
52 | CK_ATTRIBUTE_PTR (*sym_p11_kit_uri_get_attributes)(P11KitUri *uri, CK_ULONG *n_attrs); | |
85828ef9 VS |
53 | CK_ATTRIBUTE_PTR (*sym_p11_kit_uri_get_attribute)(P11KitUri *uri, CK_ATTRIBUTE_TYPE attr_type); |
54 | int (*sym_p11_kit_uri_set_attribute)(P11KitUri *uri, CK_ATTRIBUTE_PTR attr); | |
da035a3a LB |
55 | CK_INFO_PTR (*sym_p11_kit_uri_get_module_info)(P11KitUri *uri); |
56 | CK_SLOT_INFO_PTR (*sym_p11_kit_uri_get_slot_info)(P11KitUri *uri); | |
57 | CK_TOKEN_INFO_PTR (*sym_p11_kit_uri_get_token_info)(P11KitUri *uri); | |
58 | int (*sym_p11_kit_uri_match_token_info)(const P11KitUri *uri, const CK_TOKEN_INFO *token_info); | |
59 | const char *(*sym_p11_kit_uri_message)(int code); | |
60 | P11KitUri *(*sym_p11_kit_uri_new)(void); | |
61 | int (*sym_p11_kit_uri_parse)(const char *string, P11KitUriType uri_type, P11KitUri *uri); | |
62 | ||
63 | int dlopen_p11kit(void) { | |
64 | return dlopen_many_sym_or_warn( | |
65 | &p11kit_dl, | |
66 | "libp11-kit.so.0", LOG_DEBUG, | |
67 | DLSYM_ARG(p11_kit_module_get_name), | |
68 | DLSYM_ARG(p11_kit_modules_finalize_and_release), | |
69 | DLSYM_ARG(p11_kit_modules_load_and_initialize), | |
70 | DLSYM_ARG(p11_kit_strerror), | |
71 | DLSYM_ARG(p11_kit_uri_format), | |
72 | DLSYM_ARG(p11_kit_uri_free), | |
73 | DLSYM_ARG(p11_kit_uri_get_attributes), | |
85828ef9 VS |
74 | DLSYM_ARG(p11_kit_uri_get_attribute), |
75 | DLSYM_ARG(p11_kit_uri_set_attribute), | |
da035a3a LB |
76 | DLSYM_ARG(p11_kit_uri_get_module_info), |
77 | DLSYM_ARG(p11_kit_uri_get_slot_info), | |
78 | DLSYM_ARG(p11_kit_uri_get_token_info), | |
79 | DLSYM_ARG(p11_kit_uri_match_token_info), | |
80 | DLSYM_ARG(p11_kit_uri_message), | |
81 | DLSYM_ARG(p11_kit_uri_new), | |
82 | DLSYM_ARG(p11_kit_uri_parse)); | |
83 | } | |
84 | ||
839fddbe | 85 | int uri_from_string(const char *p, P11KitUri **ret) { |
da035a3a LB |
86 | _cleanup_(sym_p11_kit_uri_freep) P11KitUri *uri = NULL; |
87 | int r; | |
839fddbe LP |
88 | |
89 | assert(p); | |
90 | assert(ret); | |
91 | ||
da035a3a LB |
92 | r = dlopen_p11kit(); |
93 | if (r < 0) | |
94 | return r; | |
95 | ||
96 | uri = sym_p11_kit_uri_new(); | |
839fddbe LP |
97 | if (!uri) |
98 | return -ENOMEM; | |
99 | ||
da035a3a | 100 | if (sym_p11_kit_uri_parse(p, P11_KIT_URI_FOR_ANY, uri) != P11_KIT_URI_OK) |
839fddbe LP |
101 | return -EINVAL; |
102 | ||
103 | *ret = TAKE_PTR(uri); | |
104 | return 0; | |
105 | } | |
106 | ||
107 | P11KitUri *uri_from_module_info(const CK_INFO *info) { | |
108 | P11KitUri *uri; | |
109 | ||
110 | assert(info); | |
111 | ||
da035a3a LB |
112 | if (dlopen_p11kit() < 0) |
113 | return NULL; | |
114 | ||
115 | uri = sym_p11_kit_uri_new(); | |
839fddbe LP |
116 | if (!uri) |
117 | return NULL; | |
118 | ||
da035a3a | 119 | *sym_p11_kit_uri_get_module_info(uri) = *info; |
839fddbe LP |
120 | return uri; |
121 | } | |
122 | ||
123 | P11KitUri *uri_from_slot_info(const CK_SLOT_INFO *slot_info) { | |
124 | P11KitUri *uri; | |
125 | ||
126 | assert(slot_info); | |
127 | ||
da035a3a LB |
128 | if (dlopen_p11kit() < 0) |
129 | return NULL; | |
130 | ||
131 | uri = sym_p11_kit_uri_new(); | |
839fddbe LP |
132 | if (!uri) |
133 | return NULL; | |
134 | ||
da035a3a | 135 | *sym_p11_kit_uri_get_slot_info(uri) = *slot_info; |
839fddbe LP |
136 | return uri; |
137 | } | |
138 | ||
139 | P11KitUri *uri_from_token_info(const CK_TOKEN_INFO *token_info) { | |
140 | P11KitUri *uri; | |
141 | ||
142 | assert(token_info); | |
143 | ||
da035a3a LB |
144 | if (dlopen_p11kit() < 0) |
145 | return NULL; | |
146 | ||
147 | uri = sym_p11_kit_uri_new(); | |
839fddbe LP |
148 | if (!uri) |
149 | return NULL; | |
150 | ||
da035a3a | 151 | *sym_p11_kit_uri_get_token_info(uri) = *token_info; |
839fddbe LP |
152 | return uri; |
153 | } | |
154 | ||
155 | CK_RV pkcs11_get_slot_list_malloc( | |
156 | CK_FUNCTION_LIST *m, | |
157 | CK_SLOT_ID **ret_slotids, | |
158 | CK_ULONG *ret_n_slotids) { | |
159 | ||
160 | CK_RV rv; | |
161 | ||
162 | assert(m); | |
163 | assert(ret_slotids); | |
164 | assert(ret_n_slotids); | |
165 | ||
166 | for (unsigned tries = 0; tries < 16; tries++) { | |
167 | _cleanup_free_ CK_SLOT_ID *slotids = NULL; | |
168 | CK_ULONG n_slotids = 0; | |
169 | ||
170 | rv = m->C_GetSlotList(0, NULL, &n_slotids); | |
171 | if (rv != CKR_OK) | |
172 | return rv; | |
173 | if (n_slotids == 0) { | |
174 | *ret_slotids = NULL; | |
175 | *ret_n_slotids = 0; | |
176 | return CKR_OK; | |
177 | } | |
178 | ||
179 | slotids = new(CK_SLOT_ID, n_slotids); | |
180 | if (!slotids) | |
181 | return CKR_HOST_MEMORY; | |
182 | ||
183 | rv = m->C_GetSlotList(0, slotids, &n_slotids); | |
184 | if (rv == CKR_OK) { | |
185 | *ret_slotids = TAKE_PTR(slotids); | |
186 | *ret_n_slotids = n_slotids; | |
187 | return CKR_OK; | |
188 | } | |
189 | ||
190 | if (rv != CKR_BUFFER_TOO_SMALL) | |
191 | return rv; | |
192 | ||
193 | /* Hu? Maybe somebody plugged something in and things changed? Let's try again */ | |
194 | } | |
195 | ||
196 | return CKR_BUFFER_TOO_SMALL; | |
197 | } | |
198 | ||
199 | char *pkcs11_token_label(const CK_TOKEN_INFO *token_info) { | |
200 | char *t; | |
201 | ||
202 | /* The label is not NUL terminated and likely padded with spaces, let's make a copy here, so that we | |
203 | * can strip that. */ | |
204 | t = strndup((char*) token_info->label, sizeof(token_info->label)); | |
205 | if (!t) | |
206 | return NULL; | |
207 | ||
208 | strstrip(t); | |
209 | return t; | |
210 | } | |
211 | ||
0eb3be46 LP |
212 | char *pkcs11_token_manufacturer_id(const CK_TOKEN_INFO *token_info) { |
213 | char *t; | |
214 | ||
215 | t = strndup((char*) token_info->manufacturerID, sizeof(token_info->manufacturerID)); | |
216 | if (!t) | |
217 | return NULL; | |
218 | ||
219 | strstrip(t); | |
220 | return t; | |
221 | } | |
222 | ||
223 | char *pkcs11_token_model(const CK_TOKEN_INFO *token_info) { | |
224 | char *t; | |
225 | ||
226 | t = strndup((char*) token_info->model, sizeof(token_info->model)); | |
227 | if (!t) | |
228 | return NULL; | |
229 | ||
230 | strstrip(t); | |
231 | return t; | |
232 | } | |
233 | ||
0ff60566 OK |
234 | int pkcs11_token_login_by_pin( |
235 | CK_FUNCTION_LIST *m, | |
236 | CK_SESSION_HANDLE session, | |
237 | const CK_TOKEN_INFO *token_info, | |
238 | const char *token_label, | |
239 | const void *pin, | |
240 | size_t pin_size) { | |
241 | ||
242 | CK_RV rv; | |
da035a3a | 243 | int r; |
0ff60566 OK |
244 | |
245 | assert(m); | |
246 | assert(token_info); | |
247 | ||
da035a3a LB |
248 | r = dlopen_p11kit(); |
249 | if (r < 0) | |
250 | return r; | |
251 | ||
0ff60566 OK |
252 | if (FLAGS_SET(token_info->flags, CKF_PROTECTED_AUTHENTICATION_PATH)) { |
253 | rv = m->C_Login(session, CKU_USER, NULL, 0); | |
254 | if (rv != CKR_OK) | |
255 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
da035a3a | 256 | "Failed to log into security token '%s': %s", token_label, sym_p11_kit_strerror(rv)); |
0ff60566 OK |
257 | |
258 | log_info("Successfully logged into security token '%s' via protected authentication path.", token_label); | |
259 | return 0; | |
260 | } | |
261 | ||
262 | if (!FLAGS_SET(token_info->flags, CKF_LOGIN_REQUIRED)) { | |
263 | log_info("No login into security token '%s' required.", token_label); | |
264 | return 0; | |
265 | } | |
266 | ||
267 | if (!pin) | |
268 | return -ENOANO; | |
269 | ||
270 | rv = m->C_Login(session, CKU_USER, (CK_UTF8CHAR*) pin, pin_size); | |
271 | if (rv == CKR_OK) { | |
272 | log_info("Successfully logged into security token '%s'.", token_label); | |
273 | return 0; | |
274 | } | |
275 | ||
276 | if (rv == CKR_PIN_LOCKED) | |
277 | return log_error_errno(SYNTHETIC_ERRNO(EPERM), | |
278 | "PIN has been locked, please reset PIN of security token '%s'.", token_label); | |
279 | if (!IN_SET(rv, CKR_PIN_INCORRECT, CKR_PIN_LEN_RANGE)) | |
280 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
da035a3a | 281 | "Failed to log into security token '%s': %s", token_label, sym_p11_kit_strerror(rv)); |
0ff60566 | 282 | |
b98416e1 FS |
283 | return log_notice_errno(SYNTHETIC_ERRNO(ENOLCK), |
284 | "PIN for token '%s' is incorrect, please try again.", | |
285 | token_label); | |
0ff60566 OK |
286 | } |
287 | ||
839fddbe LP |
288 | int pkcs11_token_login( |
289 | CK_FUNCTION_LIST *m, | |
290 | CK_SESSION_HANDLE session, | |
291 | CK_SLOT_ID slotid, | |
292 | const CK_TOKEN_INFO *token_info, | |
293 | const char *friendly_name, | |
a96c284f LP |
294 | const char *askpw_icon, |
295 | const char *askpw_keyring, | |
296 | const char *askpw_credential, | |
839fddbe | 297 | usec_t until, |
b2ac9280 | 298 | AskPasswordFlags askpw_flags, |
839fddbe LP |
299 | char **ret_used_pin) { |
300 | ||
301 | _cleanup_free_ char *token_uri_string = NULL, *token_uri_escaped = NULL, *id = NULL, *token_label = NULL; | |
da035a3a | 302 | _cleanup_(sym_p11_kit_uri_freep) P11KitUri *token_uri = NULL; |
839fddbe | 303 | CK_TOKEN_INFO updated_token_info; |
0eb3be46 | 304 | int uri_result, r; |
839fddbe | 305 | CK_RV rv; |
839fddbe LP |
306 | |
307 | assert(m); | |
308 | assert(token_info); | |
309 | ||
da035a3a LB |
310 | r = dlopen_p11kit(); |
311 | if (r < 0) | |
312 | return r; | |
313 | ||
839fddbe LP |
314 | token_label = pkcs11_token_label(token_info); |
315 | if (!token_label) | |
316 | return log_oom(); | |
317 | ||
318 | token_uri = uri_from_token_info(token_info); | |
319 | if (!token_uri) | |
320 | return log_oom(); | |
321 | ||
da035a3a | 322 | uri_result = sym_p11_kit_uri_format(token_uri, P11_KIT_URI_FOR_ANY, &token_uri_string); |
839fddbe | 323 | if (uri_result != P11_KIT_URI_OK) |
da035a3a | 324 | return log_warning_errno(SYNTHETIC_ERRNO(EAGAIN), "Failed to format slot URI: %s", sym_p11_kit_uri_message(uri_result)); |
839fddbe | 325 | |
0ff60566 OK |
326 | r = pkcs11_token_login_by_pin(m, session, token_info, token_label, /* pin= */ NULL, 0); |
327 | if (r == 0 && ret_used_pin) | |
328 | *ret_used_pin = NULL; | |
839fddbe | 329 | |
0ff60566 OK |
330 | if (r != -ENOANO) /* pin required */ |
331 | return r; | |
839fddbe LP |
332 | |
333 | token_uri_escaped = cescape(token_uri_string); | |
334 | if (!token_uri_escaped) | |
335 | return log_oom(); | |
336 | ||
337 | id = strjoin("pkcs11:", token_uri_escaped); | |
338 | if (!id) | |
339 | return log_oom(); | |
340 | ||
341 | for (unsigned tries = 0; tries < 3; tries++) { | |
342 | _cleanup_strv_free_erase_ char **passwords = NULL; | |
e99ca147 | 343 | _cleanup_(erase_and_freep) char *envpin = NULL; |
e99ca147 LP |
344 | |
345 | r = getenv_steal_erase("PIN", &envpin); | |
346 | if (r < 0) | |
347 | return log_error_errno(r, "Failed to acquire PIN from environment: %m"); | |
348 | if (r > 0) { | |
349 | passwords = strv_new(envpin); | |
839fddbe LP |
350 | if (!passwords) |
351 | return log_oom(); | |
352 | ||
b2ac9280 | 353 | } else if (FLAGS_SET(askpw_flags, ASK_PASSWORD_HEADLESS)) |
cd5f57bd LB |
354 | return log_error_errno(SYNTHETIC_ERRNO(ENOPKG), "PIN querying disabled via 'headless' option. Use the 'PIN' environment variable."); |
355 | else { | |
c63ec11b LP |
356 | _cleanup_free_ char *text = NULL; |
357 | ||
358 | if (FLAGS_SET(token_info->flags, CKF_USER_PIN_FINAL_TRY)) | |
359 | r = asprintf(&text, | |
360 | "Please enter correct PIN for security token '%s' in order to unlock %s (final try):", | |
361 | token_label, friendly_name); | |
362 | else if (FLAGS_SET(token_info->flags, CKF_USER_PIN_COUNT_LOW)) | |
363 | r = asprintf(&text, | |
364 | "PIN has been entered incorrectly previously, please enter correct PIN for security token '%s' in order to unlock %s:", | |
365 | token_label, friendly_name); | |
366 | else if (tries == 0) | |
367 | r = asprintf(&text, | |
368 | "Please enter PIN for security token '%s' in order to unlock %s:", | |
369 | token_label, friendly_name); | |
370 | else | |
371 | r = asprintf(&text, | |
372 | "Please enter PIN for security token '%s' in order to unlock %s (try #%u):", | |
373 | token_label, friendly_name, tries+1); | |
374 | if (r < 0) | |
375 | return log_oom(); | |
376 | ||
d08fd4c3 LP |
377 | AskPasswordRequest req = { |
378 | .message = text, | |
a96c284f | 379 | .icon = askpw_icon, |
d08fd4c3 | 380 | .id = id, |
a96c284f LP |
381 | .keyring = askpw_keyring, |
382 | .credential = askpw_credential, | |
d08fd4c3 LP |
383 | }; |
384 | ||
839fddbe | 385 | /* We never cache PINs, simply because it's fatal if we use wrong PINs, since usually there are only 3 tries */ |
b2ac9280 | 386 | r = ask_password_auto(&req, until, askpw_flags, &passwords); |
839fddbe LP |
387 | if (r < 0) |
388 | return log_error_errno(r, "Failed to query PIN for security token '%s': %m", token_label); | |
389 | } | |
390 | ||
391 | STRV_FOREACH(i, passwords) { | |
0ff60566 OK |
392 | r = pkcs11_token_login_by_pin(m, session, token_info, token_label, *i, strlen(*i)); |
393 | if (r == 0 && ret_used_pin) { | |
394 | char *c; | |
839fddbe | 395 | |
0ff60566 OK |
396 | c = strdup(*i); |
397 | if (!c) | |
398 | return log_oom(); | |
839fddbe | 399 | |
0ff60566 | 400 | *ret_used_pin = c; |
839fddbe | 401 | } |
0ff60566 OK |
402 | |
403 | if (r != -ENOLCK) | |
404 | return r; | |
839fddbe | 405 | |
fcdd21ec | 406 | /* Refresh the token info, so that we can prompt knowing the new flags if they changed. */ |
839fddbe LP |
407 | rv = m->C_GetTokenInfo(slotid, &updated_token_info); |
408 | if (rv != CKR_OK) | |
409 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
410 | "Failed to acquire updated security token information for slot %lu: %s", | |
da035a3a | 411 | slotid, sym_p11_kit_strerror(rv)); |
839fddbe LP |
412 | |
413 | token_info = &updated_token_info; | |
839fddbe LP |
414 | } |
415 | } | |
416 | ||
417 | return log_error_errno(SYNTHETIC_ERRNO(EPERM), "Too many attempts to log into token '%s'.", token_label); | |
418 | } | |
419 | ||
420 | int pkcs11_token_find_x509_certificate( | |
421 | CK_FUNCTION_LIST *m, | |
422 | CK_SESSION_HANDLE session, | |
423 | P11KitUri *search_uri, | |
424 | CK_OBJECT_HANDLE *ret_object) { | |
425 | ||
426 | bool found_class = false, found_certificate_type = false; | |
427 | _cleanup_free_ CK_ATTRIBUTE *attributes_buffer = NULL; | |
428 | CK_ULONG n_attributes, a, n_objects; | |
429 | CK_ATTRIBUTE *attributes = NULL; | |
430 | CK_OBJECT_HANDLE objects[2]; | |
431 | CK_RV rv, rv2; | |
da035a3a | 432 | int r; |
839fddbe LP |
433 | |
434 | assert(m); | |
435 | assert(search_uri); | |
436 | assert(ret_object); | |
437 | ||
da035a3a LB |
438 | r = dlopen_p11kit(); |
439 | if (r < 0) | |
440 | return r; | |
441 | ||
442 | attributes = sym_p11_kit_uri_get_attributes(search_uri, &n_attributes); | |
839fddbe LP |
443 | for (a = 0; a < n_attributes; a++) { |
444 | ||
445 | /* We use the URI's included match attributes, but make them more strict. This allows users | |
446 | * to specify a token URL instead of an object URL and the right thing should happen if | |
447 | * there's only one suitable key on the token. */ | |
448 | ||
449 | switch (attributes[a].type) { | |
450 | ||
451 | case CKA_CLASS: { | |
452 | CK_OBJECT_CLASS c; | |
453 | ||
454 | if (attributes[a].ulValueLen != sizeof(c)) | |
455 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid PKCS#11 CKA_CLASS attribute size."); | |
456 | ||
457 | memcpy(&c, attributes[a].pValue, sizeof(c)); | |
458 | if (c != CKO_CERTIFICATE) | |
459 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Selected PKCS#11 object is not an X.509 certificate, refusing."); | |
460 | ||
461 | found_class = true; | |
462 | break; | |
463 | } | |
464 | ||
465 | case CKA_CERTIFICATE_TYPE: { | |
466 | CK_CERTIFICATE_TYPE t; | |
467 | ||
468 | if (attributes[a].ulValueLen != sizeof(t)) | |
469 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid PKCS#11 CKA_CERTIFICATE_TYPE attribute size."); | |
470 | ||
471 | memcpy(&t, attributes[a].pValue, sizeof(t)); | |
472 | if (t != CKC_X_509) | |
473 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Selected PKCS#11 object is not an X.509 certificate, refusing."); | |
474 | ||
475 | found_certificate_type = true; | |
476 | break; | |
477 | }} | |
478 | } | |
479 | ||
480 | if (!found_class || !found_certificate_type) { | |
481 | /* Hmm, let's slightly extend the attribute list we search for */ | |
482 | ||
483 | attributes_buffer = new(CK_ATTRIBUTE, n_attributes + !found_class + !found_certificate_type); | |
484 | if (!attributes_buffer) | |
485 | return log_oom(); | |
486 | ||
487 | memcpy(attributes_buffer, attributes, sizeof(CK_ATTRIBUTE) * n_attributes); | |
488 | ||
489 | if (!found_class) { | |
490 | static const CK_OBJECT_CLASS class = CKO_CERTIFICATE; | |
491 | ||
492 | attributes_buffer[n_attributes++] = (CK_ATTRIBUTE) { | |
493 | .type = CKA_CLASS, | |
494 | .pValue = (CK_OBJECT_CLASS*) &class, | |
495 | .ulValueLen = sizeof(class), | |
496 | }; | |
497 | } | |
498 | ||
499 | if (!found_certificate_type) { | |
500 | static const CK_CERTIFICATE_TYPE type = CKC_X_509; | |
501 | ||
502 | attributes_buffer[n_attributes++] = (CK_ATTRIBUTE) { | |
503 | .type = CKA_CERTIFICATE_TYPE, | |
504 | .pValue = (CK_CERTIFICATE_TYPE*) &type, | |
505 | .ulValueLen = sizeof(type), | |
506 | }; | |
507 | } | |
508 | ||
509 | attributes = attributes_buffer; | |
510 | } | |
511 | ||
512 | rv = m->C_FindObjectsInit(session, attributes, n_attributes); | |
513 | if (rv != CKR_OK) | |
514 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
da035a3a | 515 | "Failed to initialize object find call: %s", sym_p11_kit_strerror(rv)); |
839fddbe LP |
516 | |
517 | rv = m->C_FindObjects(session, objects, ELEMENTSOF(objects), &n_objects); | |
518 | rv2 = m->C_FindObjectsFinal(session); | |
519 | if (rv != CKR_OK) | |
520 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
da035a3a | 521 | "Failed to find objects: %s", sym_p11_kit_strerror(rv)); |
839fddbe LP |
522 | if (rv2 != CKR_OK) |
523 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
da035a3a | 524 | "Failed to finalize object find call: %s", sym_p11_kit_strerror(rv)); |
839fddbe LP |
525 | if (n_objects == 0) |
526 | return log_error_errno(SYNTHETIC_ERRNO(ENOENT), | |
527 | "Failed to find selected X509 certificate on token."); | |
528 | if (n_objects > 1) | |
529 | return log_error_errno(SYNTHETIC_ERRNO(ENOTUNIQ), | |
530 | "Configured URI matches multiple certificates, refusing."); | |
531 | ||
532 | *ret_object = objects[0]; | |
533 | return 0; | |
534 | } | |
535 | ||
536 | #if HAVE_OPENSSL | |
85686b37 VS |
537 | static int read_public_key_info( |
538 | CK_FUNCTION_LIST *m, | |
539 | CK_SESSION_HANDLE session, | |
540 | CK_OBJECT_HANDLE object, | |
541 | EVP_PKEY **ret_pkey) { | |
542 | ||
543 | CK_ATTRIBUTE attribute = { CKA_PUBLIC_KEY_INFO, NULL_PTR, 0 }; | |
544 | _cleanup_(EVP_PKEY_freep) EVP_PKEY *pkey = NULL; | |
545 | CK_RV rv; | |
546 | ||
547 | rv = m->C_GetAttributeValue(session, object, &attribute, 1); | |
548 | if (rv != CKR_OK) | |
549 | return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), | |
550 | "Failed to get size of CKA_PUBLIC_KEY_INFO: %s", sym_p11_kit_strerror(rv)); | |
551 | ||
552 | if (attribute.ulValueLen == 0) | |
553 | return log_debug_errno(SYNTHETIC_ERRNO(ENOENT), "CKA_PUBLIC_KEY_INFO is empty"); | |
554 | ||
555 | _cleanup_free_ void *buffer = malloc(attribute.ulValueLen); | |
556 | if (!buffer) | |
557 | return log_oom_debug(); | |
558 | ||
559 | attribute.pValue = buffer; | |
560 | ||
561 | rv = m->C_GetAttributeValue(session, object, &attribute, 1); | |
562 | if (rv != CKR_OK) | |
563 | return log_debug_errno(SYNTHETIC_ERRNO(EIO), | |
564 | "Failed to read CKA_PUBLIC_KEY_INFO: %s", sym_p11_kit_strerror(rv)); | |
565 | ||
566 | const unsigned char *value = attribute.pValue; | |
567 | pkey = d2i_PUBKEY(NULL, &value, attribute.ulValueLen); | |
568 | if (!pkey) | |
569 | return log_debug_errno(SYNTHETIC_ERRNO(EBADMSG), "Failed to parse CKA_PUBLIC_KEY_INFO"); | |
570 | ||
571 | *ret_pkey = TAKE_PTR(pkey); | |
572 | return 0; | |
573 | } | |
574 | ||
575 | int pkcs11_token_read_public_key( | |
576 | CK_FUNCTION_LIST *m, | |
577 | CK_SESSION_HANDLE session, | |
578 | CK_OBJECT_HANDLE object, | |
579 | EVP_PKEY **ret_pkey) { | |
580 | ||
581 | _cleanup_(EVP_PKEY_freep) EVP_PKEY *pkey = NULL; | |
582 | CK_RV rv; | |
583 | int r; | |
584 | ||
585 | r = read_public_key_info(m, session, object, &pkey); | |
586 | if (r >= 0) { | |
587 | *ret_pkey = TAKE_PTR(pkey); | |
588 | return 0; | |
589 | } | |
590 | ||
591 | CK_KEY_TYPE key_type; | |
592 | CK_ATTRIBUTE attribute = { CKA_KEY_TYPE, &key_type, sizeof(key_type) }; | |
593 | ||
594 | rv = m->C_GetAttributeValue(session, object, &attribute, 1); | |
595 | if (rv != CKR_OK) | |
596 | return log_debug_errno(SYNTHETIC_ERRNO(EIO), | |
597 | "Failed to get CKA_KEY_TYPE of a public key: %s", sym_p11_kit_strerror(rv)); | |
598 | ||
599 | switch (key_type) { | |
600 | case CKK_RSA: { | |
601 | CK_ATTRIBUTE rsa_attributes[] = { | |
602 | { CKA_MODULUS, NULL_PTR, 0 }, | |
603 | { CKA_PUBLIC_EXPONENT, NULL_PTR, 0 }, | |
604 | }; | |
605 | ||
606 | rv = m->C_GetAttributeValue(session, object, rsa_attributes, ELEMENTSOF(rsa_attributes)); | |
607 | if (rv != CKR_OK) | |
608 | return log_debug_errno(SYNTHETIC_ERRNO(EIO), | |
609 | "Failed to get size of attributes of an RSA public key: %s", sym_p11_kit_strerror(rv)); | |
610 | ||
611 | if (rsa_attributes[0].ulValueLen == 0) | |
612 | return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "An RSA public key has empty CKA_MODULUS."); | |
613 | ||
614 | _cleanup_free_ void *modulus = malloc(rsa_attributes[0].ulValueLen); | |
615 | if (!modulus) | |
616 | return log_oom_debug(); | |
617 | ||
618 | rsa_attributes[0].pValue = modulus; | |
619 | ||
620 | if (rsa_attributes[1].ulValueLen == 0) | |
621 | return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "An RSA public key has empty CKA_PUBLIC_EXPONENT."); | |
622 | ||
623 | _cleanup_free_ void *public_exponent = malloc(rsa_attributes[1].ulValueLen); | |
624 | if (!public_exponent) | |
625 | return log_oom_debug(); | |
626 | ||
627 | rsa_attributes[1].pValue = public_exponent; | |
628 | ||
629 | rv = m->C_GetAttributeValue(session, object, rsa_attributes, ELEMENTSOF(rsa_attributes)); | |
630 | if (rv != CKR_OK) | |
631 | return log_debug_errno(SYNTHETIC_ERRNO(EIO), | |
632 | "Failed to get attributes of an RSA public key: %s", sym_p11_kit_strerror(rv)); | |
633 | ||
634 | size_t n_size = rsa_attributes[0].ulValueLen, e_size = rsa_attributes[1].ulValueLen; | |
635 | r = rsa_pkey_from_n_e(rsa_attributes[0].pValue, n_size, rsa_attributes[1].pValue, e_size, &pkey); | |
636 | if (r < 0) | |
637 | return log_debug_errno(r, "Failed to create an EVP_PKEY from RSA parameters."); | |
638 | ||
639 | break; | |
640 | } | |
641 | case CKK_EC: { | |
642 | CK_ATTRIBUTE ec_attributes[] = { | |
643 | { CKA_EC_PARAMS, NULL_PTR, 0 }, | |
644 | { CKA_EC_POINT, NULL_PTR, 0 }, | |
645 | }; | |
646 | ||
647 | rv = m->C_GetAttributeValue(session, object, ec_attributes, ELEMENTSOF(ec_attributes)); | |
648 | if (rv != CKR_OK) | |
649 | return log_debug_errno(SYNTHETIC_ERRNO(EIO), | |
650 | "Failed to get size of attributes of an EC public key: %s", sym_p11_kit_strerror(rv)); | |
651 | ||
652 | if (ec_attributes[0].ulValueLen == 0) | |
653 | return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "An EC public key has empty CKA_EC_PARAMS."); | |
654 | ||
655 | _cleanup_free_ void *ec_group = malloc(ec_attributes[0].ulValueLen); | |
656 | if (!ec_group) | |
657 | return log_oom_debug(); | |
658 | ||
659 | ec_attributes[0].pValue = ec_group; | |
660 | ||
661 | if (ec_attributes[1].ulValueLen == 0) | |
662 | return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "An EC public key has empty CKA_EC_POINT."); | |
663 | ||
664 | _cleanup_free_ void *ec_point = malloc(ec_attributes[1].ulValueLen); | |
665 | if (!ec_point) | |
666 | return log_oom_debug(); | |
667 | ||
668 | ec_attributes[1].pValue = ec_point; | |
669 | ||
670 | rv = m->C_GetAttributeValue(session, object, ec_attributes, ELEMENTSOF(ec_attributes)); | |
671 | if (rv != CKR_OK) | |
672 | return log_debug_errno(SYNTHETIC_ERRNO(EIO), | |
673 | "Failed to get attributes of an EC public key: %s", sym_p11_kit_strerror(rv)); | |
674 | ||
675 | _cleanup_(EC_GROUP_freep) EC_GROUP *group = NULL; | |
676 | _cleanup_(ASN1_OCTET_STRING_freep) ASN1_OCTET_STRING *os = NULL; | |
677 | ||
678 | const unsigned char *ec_params_value = ec_attributes[0].pValue; | |
679 | group = d2i_ECPKParameters(NULL, &ec_params_value, ec_attributes[0].ulValueLen); | |
680 | if (!group) | |
681 | return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Unable to decode CKA_EC_PARAMS."); | |
682 | ||
683 | const unsigned char *ec_point_value = ec_attributes[1].pValue; | |
684 | os = d2i_ASN1_OCTET_STRING(NULL, &ec_point_value, ec_attributes[1].ulValueLen); | |
685 | if (!os) | |
686 | return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Unable to decode CKA_EC_POINT."); | |
687 | ||
688 | #if OPENSSL_VERSION_MAJOR >= 3 | |
689 | _cleanup_(EVP_PKEY_CTX_freep) EVP_PKEY_CTX *ctx = EVP_PKEY_CTX_new_from_name(NULL, "EC", NULL); | |
690 | if (!ctx) | |
691 | return log_debug_errno(SYNTHETIC_ERRNO(EIO), "Failed to create an EVP_PKEY_CTX for EC."); | |
692 | ||
693 | if (EVP_PKEY_fromdata_init(ctx) != 1) | |
694 | return log_debug_errno(SYNTHETIC_ERRNO(EIO), "Failed to init an EVP_PKEY_CTX for EC."); | |
695 | ||
696 | OSSL_PARAM ec_params[8] = { | |
697 | OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_PUB_KEY, os->data, os->length) | |
698 | }; | |
699 | ||
700 | _cleanup_free_ void *order = NULL, *p = NULL, *a = NULL, *b = NULL, *generator = NULL; | |
701 | size_t order_size, p_size, a_size, b_size, generator_size; | |
702 | ||
703 | int nid = EC_GROUP_get_curve_name(group); | |
704 | if (nid != NID_undef) { | |
705 | const char* name = OSSL_EC_curve_nid2name(nid); | |
706 | ec_params[1] = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_GROUP_NAME, (char*)name, strlen(name)); | |
707 | ec_params[2] = OSSL_PARAM_construct_end(); | |
708 | } else { | |
709 | const char *field_type = EC_GROUP_get_field_type(group) == NID_X9_62_prime_field ? | |
710 | "prime-field" : "characteristic-two-field"; | |
711 | ||
712 | const BIGNUM *bn_order = EC_GROUP_get0_order(group); | |
713 | ||
714 | _cleanup_(BN_CTX_freep) BN_CTX *bnctx = BN_CTX_new(); | |
715 | if (!bnctx) | |
716 | return log_oom_debug(); | |
717 | ||
718 | _cleanup_(BN_freep) BIGNUM *bn_p = BN_new(); | |
719 | if (!bn_p) | |
720 | return log_oom_debug(); | |
721 | ||
722 | _cleanup_(BN_freep) BIGNUM *bn_a = BN_new(); | |
723 | if (!bn_a) | |
724 | return log_oom_debug(); | |
725 | ||
726 | _cleanup_(BN_freep) BIGNUM *bn_b = BN_new(); | |
727 | if (!bn_b) | |
728 | return log_oom_debug(); | |
729 | ||
730 | if (EC_GROUP_get_curve(group, bn_p, bn_a, bn_b, bnctx) != 1) | |
731 | return log_debug_errno(SYNTHETIC_ERRNO(EIO), "Failed to extract EC parameters from EC_GROUP."); | |
732 | ||
733 | order_size = BN_num_bytes(bn_order); | |
734 | p_size = BN_num_bytes(bn_p); | |
735 | a_size = BN_num_bytes(bn_a); | |
736 | b_size = BN_num_bytes(bn_b); | |
737 | ||
738 | order = malloc(order_size); | |
739 | if (!order) | |
740 | return log_oom_debug(); | |
741 | ||
742 | p = malloc(p_size); | |
743 | if (!p) | |
744 | return log_oom_debug(); | |
745 | ||
746 | a = malloc(a_size); | |
747 | if (!a) | |
748 | return log_oom_debug(); | |
749 | ||
750 | b = malloc(b_size); | |
751 | if (!b) | |
752 | return log_oom_debug(); | |
753 | ||
754 | if (BN_bn2nativepad(bn_order, order, order_size) <= 0 || | |
755 | BN_bn2nativepad(bn_p, p, p_size) <= 0 || | |
756 | BN_bn2nativepad(bn_a, a, a_size) <= 0 || | |
757 | BN_bn2nativepad(bn_b, b, b_size) <= 0 ) | |
758 | return log_debug_errno(SYNTHETIC_ERRNO(EIO), "Failed to store EC parameters in native byte order."); | |
759 | ||
760 | const EC_POINT *point_gen = EC_GROUP_get0_generator(group); | |
761 | generator_size = EC_POINT_point2oct(group, point_gen, POINT_CONVERSION_UNCOMPRESSED, NULL, 0, bnctx); | |
762 | if (generator_size == 0) | |
763 | return log_debug_errno(SYNTHETIC_ERRNO(EIO), "Failed to determine size of a EC generator."); | |
764 | ||
765 | generator = malloc(generator_size); | |
766 | if (!generator) | |
767 | return log_oom_debug(); | |
768 | ||
769 | generator_size = EC_POINT_point2oct(group, point_gen, POINT_CONVERSION_UNCOMPRESSED, generator, generator_size, bnctx); | |
770 | if (generator_size == 0) | |
771 | return log_debug_errno(SYNTHETIC_ERRNO(EIO), "Failed to convert a EC generator to octet string."); | |
772 | ||
773 | ec_params[1] = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_EC_FIELD_TYPE, (char*)field_type, strlen(field_type)); | |
774 | ec_params[2] = OSSL_PARAM_construct_octet_string(OSSL_PKEY_PARAM_EC_GENERATOR, generator, generator_size); | |
775 | ec_params[3] = OSSL_PARAM_construct_BN(OSSL_PKEY_PARAM_EC_ORDER, order, order_size); | |
776 | ec_params[4] = OSSL_PARAM_construct_BN(OSSL_PKEY_PARAM_EC_P, p, p_size); | |
777 | ec_params[5] = OSSL_PARAM_construct_BN(OSSL_PKEY_PARAM_EC_A, a, a_size); | |
778 | ec_params[6] = OSSL_PARAM_construct_BN(OSSL_PKEY_PARAM_EC_B, b, b_size); | |
779 | ec_params[7] = OSSL_PARAM_construct_end(); | |
780 | } | |
781 | ||
782 | if (EVP_PKEY_fromdata(ctx, &pkey, EVP_PKEY_PUBLIC_KEY, ec_params) != 1) | |
783 | return log_debug_errno(SYNTHETIC_ERRNO(EIO), "Failed to create EVP_PKEY from EC parameters."); | |
784 | #else | |
785 | _cleanup_(EC_POINT_freep) EC_POINT *point = EC_POINT_new(group); | |
786 | if (!point) | |
787 | return log_oom_debug(); | |
788 | ||
789 | if (EC_POINT_oct2point(group, point, os->data, os->length, NULL) != 1) | |
790 | return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Unable to decode CKA_EC_POINT."); | |
791 | ||
792 | _cleanup_(EC_KEY_freep) EC_KEY *ec_key = EC_KEY_new(); | |
793 | if (!ec_key) | |
794 | return log_oom_debug(); | |
795 | ||
796 | if (EC_KEY_set_group(ec_key, group) != 1) | |
797 | return log_debug_errno(SYNTHETIC_ERRNO(EIO), "Failed to set group for EC_KEY."); | |
798 | ||
799 | if (EC_KEY_set_public_key(ec_key, point) != 1) | |
800 | return log_debug_errno(SYNTHETIC_ERRNO(EIO), "Failed to set public key for EC_KEY."); | |
801 | ||
802 | pkey = EVP_PKEY_new(); | |
803 | if (!pkey) | |
804 | return log_oom_debug(); | |
805 | ||
806 | if (EVP_PKEY_set1_EC_KEY(pkey, ec_key) != 1) | |
807 | return log_debug_errno(SYNTHETIC_ERRNO(EIO), "Failed to assign EC_KEY to EVP_PKEY."); | |
808 | #endif | |
809 | break; | |
810 | } | |
811 | default: | |
812 | return log_debug_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), "Unsupported type of public key: %lu", key_type); | |
813 | } | |
814 | ||
815 | *ret_pkey = TAKE_PTR(pkey); | |
816 | return 0; | |
817 | } | |
818 | ||
839fddbe LP |
819 | int pkcs11_token_read_x509_certificate( |
820 | CK_FUNCTION_LIST *m, | |
821 | CK_SESSION_HANDLE session, | |
822 | CK_OBJECT_HANDLE object, | |
823 | X509 **ret_cert) { | |
824 | ||
839fddbe LP |
825 | _cleanup_free_ char *t = NULL; |
826 | CK_ATTRIBUTE attribute = { | |
827 | .type = CKA_VALUE | |
828 | }; | |
829 | CK_RV rv; | |
830 | _cleanup_(X509_freep) X509 *x509 = NULL; | |
831 | X509_NAME *name = NULL; | |
da035a3a LB |
832 | int r; |
833 | ||
834 | r = dlopen_p11kit(); | |
835 | if (r < 0) | |
836 | return r; | |
839fddbe LP |
837 | |
838 | rv = m->C_GetAttributeValue(session, object, &attribute, 1); | |
839 | if (rv != CKR_OK) | |
85686b37 | 840 | return log_debug_errno(SYNTHETIC_ERRNO(EIO), |
da035a3a | 841 | "Failed to read X.509 certificate size off token: %s", sym_p11_kit_strerror(rv)); |
839fddbe | 842 | |
85686b37 | 843 | _cleanup_free_ void *buffer = malloc(attribute.ulValueLen); |
839fddbe | 844 | if (!buffer) |
85686b37 | 845 | return log_oom_debug(); |
839fddbe LP |
846 | |
847 | attribute.pValue = buffer; | |
848 | ||
849 | rv = m->C_GetAttributeValue(session, object, &attribute, 1); | |
850 | if (rv != CKR_OK) | |
85686b37 | 851 | return log_debug_errno(SYNTHETIC_ERRNO(EIO), |
da035a3a | 852 | "Failed to read X.509 certificate data off token: %s", sym_p11_kit_strerror(rv)); |
839fddbe | 853 | |
85686b37 | 854 | const unsigned char *p = attribute.pValue; |
839fddbe LP |
855 | x509 = d2i_X509(NULL, &p, attribute.ulValueLen); |
856 | if (!x509) | |
85686b37 | 857 | return log_debug_errno(SYNTHETIC_ERRNO(EBADMSG), "Failed to parse X.509 certificate."); |
839fddbe LP |
858 | |
859 | name = X509_get_subject_name(x509); | |
860 | if (!name) | |
85686b37 | 861 | return log_debug_errno(SYNTHETIC_ERRNO(EBADMSG), "Failed to acquire X.509 subject name."); |
839fddbe LP |
862 | |
863 | t = X509_NAME_oneline(name, NULL, 0); | |
864 | if (!t) | |
85686b37 | 865 | return log_debug_errno(SYNTHETIC_ERRNO(EIO), "Failed to format X.509 subject name as string."); |
839fddbe LP |
866 | |
867 | log_debug("Using X.509 certificate issued for '%s'.", t); | |
868 | ||
869 | *ret_cert = TAKE_PTR(x509); | |
870 | return 0; | |
871 | } | |
872 | #endif | |
873 | ||
874 | int pkcs11_token_find_private_key( | |
875 | CK_FUNCTION_LIST *m, | |
876 | CK_SESSION_HANDLE session, | |
877 | P11KitUri *search_uri, | |
878 | CK_OBJECT_HANDLE *ret_object) { | |
879 | ||
3d05c058 VS |
880 | uint_fast8_t n_objects = 0; |
881 | bool found_class = false; | |
839fddbe | 882 | _cleanup_free_ CK_ATTRIBUTE *attributes_buffer = NULL; |
5b54fe8d | 883 | CK_OBJECT_HANDLE object = 0, candidate; |
3d05c058 VS |
884 | static const CK_OBJECT_CLASS class = CKO_PRIVATE_KEY; |
885 | CK_BBOOL decrypt_value, derive_value; | |
886 | CK_ATTRIBUTE optional_attributes[] = { | |
887 | { CKA_DECRYPT, &decrypt_value, sizeof(decrypt_value) }, | |
888 | { CKA_DERIVE, &derive_value, sizeof(derive_value) } | |
889 | }; | |
890 | CK_RV rv; | |
839fddbe LP |
891 | |
892 | assert(m); | |
893 | assert(search_uri); | |
894 | assert(ret_object); | |
895 | ||
3d05c058 VS |
896 | CK_ULONG n_attributes; |
897 | CK_ATTRIBUTE *attributes = sym_p11_kit_uri_get_attributes(search_uri, &n_attributes); | |
898 | for (CK_ULONG i = 0; i < n_attributes; i++) { | |
839fddbe LP |
899 | |
900 | /* We use the URI's included match attributes, but make them more strict. This allows users | |
901 | * to specify a token URL instead of an object URL and the right thing should happen if | |
902 | * there's only one suitable key on the token. */ | |
903 | ||
3d05c058 | 904 | switch (attributes[i].type) { |
839fddbe LP |
905 | case CKA_CLASS: { |
906 | CK_OBJECT_CLASS c; | |
907 | ||
3d05c058 | 908 | if (attributes[i].ulValueLen != sizeof(c)) |
839fddbe LP |
909 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid PKCS#11 CKA_CLASS attribute size."); |
910 | ||
3d05c058 | 911 | memcpy(&c, attributes[i].pValue, sizeof(c)); |
839fddbe LP |
912 | if (c != CKO_PRIVATE_KEY) |
913 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
914 | "Selected PKCS#11 object is not a private key, refusing."); | |
915 | ||
916 | found_class = true; | |
917 | break; | |
839fddbe LP |
918 | }} |
919 | } | |
920 | ||
3d05c058 | 921 | if (!found_class) { |
839fddbe LP |
922 | /* Hmm, let's slightly extend the attribute list we search for */ |
923 | ||
3d05c058 | 924 | attributes_buffer = new(CK_ATTRIBUTE, n_attributes + 1); |
839fddbe LP |
925 | if (!attributes_buffer) |
926 | return log_oom(); | |
927 | ||
928 | memcpy(attributes_buffer, attributes, sizeof(CK_ATTRIBUTE) * n_attributes); | |
929 | ||
3d05c058 VS |
930 | attributes_buffer[n_attributes++] = (CK_ATTRIBUTE) { |
931 | .type = CKA_CLASS, | |
932 | .pValue = (CK_OBJECT_CLASS*) &class, | |
933 | .ulValueLen = sizeof(class), | |
934 | }; | |
839fddbe LP |
935 | |
936 | attributes = attributes_buffer; | |
937 | } | |
938 | ||
939 | rv = m->C_FindObjectsInit(session, attributes, n_attributes); | |
940 | if (rv != CKR_OK) | |
941 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
da035a3a | 942 | "Failed to initialize object find call: %s", sym_p11_kit_strerror(rv)); |
839fddbe | 943 | |
3d05c058 VS |
944 | for (;;) { |
945 | CK_ULONG b; | |
946 | rv = m->C_FindObjects(session, &candidate, 1, &b); | |
947 | if (rv != CKR_OK) | |
948 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
949 | "Failed to find objects: %s", sym_p11_kit_strerror(rv)); | |
950 | ||
951 | if (b == 0) | |
952 | break; | |
953 | ||
954 | bool can_decrypt = false, can_derive = false; | |
955 | optional_attributes[0].ulValueLen = sizeof(decrypt_value); | |
956 | optional_attributes[1].ulValueLen = sizeof(derive_value); | |
957 | ||
958 | rv = m->C_GetAttributeValue(session, candidate, optional_attributes, ELEMENTSOF(optional_attributes)); | |
c83f4220 | 959 | if (!IN_SET(rv, CKR_OK, CKR_ATTRIBUTE_TYPE_INVALID)) |
3d05c058 VS |
960 | return log_error_errno(SYNTHETIC_ERRNO(EIO), |
961 | "Failed to get attributes of a selected private key: %s", sym_p11_kit_strerror(rv)); | |
962 | ||
963 | if (optional_attributes[0].ulValueLen != CK_UNAVAILABLE_INFORMATION && decrypt_value == CK_TRUE) | |
964 | can_decrypt = true; | |
965 | ||
966 | if (optional_attributes[1].ulValueLen != CK_UNAVAILABLE_INFORMATION && derive_value == CK_TRUE) | |
967 | can_derive = true; | |
968 | ||
969 | if (can_decrypt || can_derive) { | |
970 | n_objects++; | |
971 | if (n_objects > 1) | |
972 | break; | |
973 | object = candidate; | |
974 | } | |
975 | } | |
976 | ||
977 | rv = m->C_FindObjectsFinal(session); | |
839fddbe LP |
978 | if (rv != CKR_OK) |
979 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
3d05c058 VS |
980 | "Failed to finalize object find call: %s", sym_p11_kit_strerror(rv)); |
981 | ||
839fddbe LP |
982 | if (n_objects == 0) |
983 | return log_error_errno(SYNTHETIC_ERRNO(ENOENT), | |
3d05c058 VS |
984 | "Failed to find selected private key suitable for decryption or derivation on token."); |
985 | ||
839fddbe LP |
986 | if (n_objects > 1) |
987 | return log_error_errno(SYNTHETIC_ERRNO(ENOTUNIQ), | |
3d05c058 | 988 | "Configured private key URI matches multiple keys, refusing."); |
839fddbe | 989 | |
3d05c058 | 990 | *ret_object = object; |
839fddbe LP |
991 | return 0; |
992 | } | |
993 | ||
06b77382 VS |
994 | static const char* object_class_to_string(CK_OBJECT_CLASS class) { |
995 | switch (class) { | |
996 | case CKO_CERTIFICATE: | |
997 | return "CKO_CERTIFICATE"; | |
998 | case CKO_PUBLIC_KEY: | |
999 | return "CKO_PUBLIC_KEY"; | |
1000 | case CKO_PRIVATE_KEY: | |
1001 | return "CKO_PRIVATE_KEY"; | |
1002 | case CKO_SECRET_KEY: | |
1003 | return "CKO_SECRET_KEY"; | |
1004 | default: | |
1005 | return NULL; | |
1006 | } | |
1007 | } | |
1008 | ||
1009 | /* Returns an object with the given class and the same CKA_ID or CKA_LABEL as prototype */ | |
1010 | int pkcs11_token_find_related_object( | |
1011 | CK_FUNCTION_LIST *m, | |
1012 | CK_SESSION_HANDLE session, | |
1013 | CK_OBJECT_HANDLE prototype, | |
1014 | CK_OBJECT_CLASS class, | |
1015 | CK_OBJECT_HANDLE *ret_object ) { | |
1016 | ||
1017 | _cleanup_free_ void *buffer = NULL; | |
1018 | CK_ATTRIBUTE attributes[] = { | |
1019 | { CKA_ID, NULL_PTR, 0 }, | |
1020 | { CKA_LABEL, NULL_PTR, 0 } | |
1021 | }; | |
1022 | CK_OBJECT_CLASS search_class = class; | |
1023 | CK_ATTRIBUTE search_attributes[2] = { | |
1024 | { CKA_CLASS, &search_class, sizeof(search_class) } | |
1025 | }; | |
1026 | CK_ULONG n_objects; | |
1027 | CK_OBJECT_HANDLE objects[2]; | |
1028 | CK_RV rv; | |
1029 | ||
1030 | rv = m->C_GetAttributeValue(session, prototype, attributes, ELEMENTSOF(attributes)); | |
c83f4220 | 1031 | if (!IN_SET(rv, CKR_OK, CKR_ATTRIBUTE_TYPE_INVALID)) |
06b77382 VS |
1032 | return log_debug_errno(SYNTHETIC_ERRNO(EIO), "Failed to retrieve length of attributes: %s", sym_p11_kit_strerror(rv)); |
1033 | ||
1034 | if (attributes[0].ulValueLen != CK_UNAVAILABLE_INFORMATION) { | |
1035 | buffer = malloc(attributes[0].ulValueLen); | |
1036 | if (!buffer) | |
1037 | return log_oom(); | |
1038 | ||
1039 | attributes[0].pValue = buffer; | |
1040 | rv = m->C_GetAttributeValue(session, prototype, &attributes[0], 1); | |
1041 | if (rv != CKR_OK) | |
1042 | return log_debug_errno(SYNTHETIC_ERRNO(EIO), | |
1043 | "Failed to retrieve CKA_ID: %s", sym_p11_kit_strerror(rv)); | |
1044 | ||
1045 | search_attributes[1] = attributes[0]; | |
1046 | ||
1047 | } else if (attributes[1].ulValueLen != CK_UNAVAILABLE_INFORMATION) { | |
1048 | buffer = malloc(attributes[1].ulValueLen); | |
1049 | if (!buffer) | |
1050 | return log_oom(); | |
1051 | ||
1052 | attributes[1].pValue = buffer; | |
1053 | rv = m->C_GetAttributeValue(session, prototype, &attributes[1], 1); | |
1054 | if (rv != CKR_OK) | |
1055 | return log_debug_errno(SYNTHETIC_ERRNO(EIO), | |
1056 | "Failed to retrieve CKA_LABEL: %s", sym_p11_kit_strerror(rv)); | |
1057 | ||
1058 | search_attributes[1] = attributes[1]; | |
1059 | ||
1060 | } else | |
1061 | return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "The prototype does not have CKA_ID or CKA_LABEL"); | |
1062 | ||
1063 | rv = m->C_FindObjectsInit(session, search_attributes, 2); | |
1064 | if (rv != CKR_OK) | |
1065 | return log_debug_errno(SYNTHETIC_ERRNO(EIO), | |
1066 | "Failed to initialize object find call: %s", sym_p11_kit_strerror(rv)); | |
1067 | ||
1068 | rv = m->C_FindObjects(session, objects, 2, &n_objects); | |
1069 | if (rv != CKR_OK) | |
1070 | return log_debug_errno(SYNTHETIC_ERRNO(EIO), | |
1071 | "Failed to find objects: %s", sym_p11_kit_strerror(rv)); | |
1072 | ||
1073 | rv = m->C_FindObjectsFinal(session); | |
1074 | if (rv != CKR_OK) | |
1075 | return log_debug_errno(SYNTHETIC_ERRNO(EIO), | |
1076 | "Failed to finalize object find call: %s", sym_p11_kit_strerror(rv)); | |
1077 | ||
1078 | if (n_objects == 0) | |
1079 | return log_debug_errno(SYNTHETIC_ERRNO(ENOENT), | |
1080 | "Failed to find a related object with class %s", object_class_to_string(class)); | |
1081 | ||
1082 | if (n_objects > 1) | |
1083 | log_warning("Found multiple related objects with class %s, using the first object.", | |
1084 | object_class_to_string(class)); | |
1085 | ||
1086 | *ret_object = objects[0]; | |
1087 | return 0; | |
1088 | } | |
1089 | ||
1090 | #if HAVE_OPENSSL | |
1091 | static int ecc_convert_to_compressed( | |
1092 | CK_FUNCTION_LIST *m, | |
1093 | CK_SESSION_HANDLE session, | |
1094 | CK_OBJECT_HANDLE object, | |
1095 | const void *uncompressed_point, | |
1096 | size_t uncompressed_point_size, | |
1097 | void **ret_compressed_point, | |
1098 | size_t *ret_compressed_point_size) { | |
1099 | ||
1100 | _cleanup_free_ void *ec_params_buffer = NULL; | |
1101 | CK_ATTRIBUTE ec_params_attr = { CKA_EC_PARAMS, NULL_PTR, 0 }; | |
1102 | CK_RV rv; | |
1103 | int r; | |
1104 | ||
1105 | rv = m->C_GetAttributeValue(session, object, &ec_params_attr, 1); | |
c83f4220 | 1106 | if (!IN_SET(rv, CKR_OK, CKR_ATTRIBUTE_TYPE_INVALID)) |
06b77382 VS |
1107 | return log_error_errno(SYNTHETIC_ERRNO(EIO), |
1108 | "Failed to retrieve length of CKA_EC_PARAMS: %s", sym_p11_kit_strerror(rv)); | |
1109 | ||
1110 | if (ec_params_attr.ulValueLen != CK_UNAVAILABLE_INFORMATION) { | |
1111 | ec_params_buffer = malloc(ec_params_attr.ulValueLen); | |
1112 | if (!ec_params_buffer) | |
1113 | return log_oom(); | |
1114 | ||
1115 | ec_params_attr.pValue = ec_params_buffer; | |
1116 | rv = m->C_GetAttributeValue(session, object, &ec_params_attr, 1); | |
1117 | if (rv != CKR_OK) | |
1118 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
1119 | "Failed to retrieve CKA_EC_PARAMS from a private key: %s", sym_p11_kit_strerror(rv)); | |
1120 | } else { | |
1121 | CK_OBJECT_HANDLE public_key; | |
1122 | r = pkcs11_token_find_related_object(m, session, object, CKO_PUBLIC_KEY, &public_key); | |
1123 | if (r < 0) | |
1124 | return log_error_errno(r, "Failed to find a public key for compressing a EC point"); | |
1125 | ||
1126 | ec_params_attr.ulValueLen = 0; | |
1127 | rv = m->C_GetAttributeValue(session, public_key, &ec_params_attr, 1); | |
c83f4220 | 1128 | if (!IN_SET(rv, CKR_OK, CKR_ATTRIBUTE_TYPE_INVALID)) |
06b77382 VS |
1129 | return log_error_errno(SYNTHETIC_ERRNO(EIO), |
1130 | "Failed to retrieve length of CKA_EC_PARAMS: %s", sym_p11_kit_strerror(rv)); | |
1131 | ||
1132 | if (ec_params_attr.ulValueLen == CK_UNAVAILABLE_INFORMATION) | |
1133 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
1134 | "The public key does not have CKA_EC_PARAMS"); | |
1135 | ||
1136 | ec_params_buffer = malloc(ec_params_attr.ulValueLen); | |
1137 | if (!ec_params_buffer) | |
1138 | return log_oom(); | |
1139 | ||
1140 | ec_params_attr.pValue = ec_params_buffer; | |
1141 | rv = m->C_GetAttributeValue(session, public_key, &ec_params_attr, 1); | |
1142 | if (rv != CKR_OK) | |
1143 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
1144 | "Failed to retrieve CKA_EC_PARAMS from a public key: %s", sym_p11_kit_strerror(rv)); | |
1145 | } | |
1146 | ||
1147 | _cleanup_(EC_GROUP_freep) EC_GROUP *group = NULL; | |
1148 | _cleanup_(EC_POINT_freep) EC_POINT *point = NULL; | |
1149 | _cleanup_(BN_CTX_freep) BN_CTX *bnctx = NULL; | |
1150 | _cleanup_free_ void *compressed_point = NULL; | |
1151 | size_t compressed_point_size; | |
1152 | ||
1153 | const unsigned char *ec_params_value = ec_params_attr.pValue; | |
1154 | group = d2i_ECPKParameters(NULL, &ec_params_value, ec_params_attr.ulValueLen); | |
1155 | if (!group) | |
1156 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Unable to decode CKA_EC_PARAMS"); | |
1157 | ||
1158 | point = EC_POINT_new(group); | |
1159 | if (!point) | |
1160 | return log_oom(); | |
1161 | ||
1162 | bnctx = BN_CTX_new(); | |
1163 | if (!bnctx) | |
1164 | return log_oom(); | |
1165 | ||
1166 | if (EC_POINT_oct2point(group, point, uncompressed_point, uncompressed_point_size, bnctx) != 1) | |
1167 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Unable to decode an uncompressed EC point"); | |
1168 | ||
1169 | compressed_point_size = EC_POINT_point2oct(group, point, POINT_CONVERSION_COMPRESSED, NULL, 0, bnctx); | |
1170 | if (compressed_point_size == 0) | |
1171 | return log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to determine size of a compressed EC point"); | |
1172 | ||
1173 | compressed_point = malloc(compressed_point_size); | |
1174 | if (!compressed_point) | |
1175 | return log_oom(); | |
1176 | ||
1177 | compressed_point_size = EC_POINT_point2oct(group, point, POINT_CONVERSION_COMPRESSED, compressed_point, compressed_point_size, bnctx); | |
1178 | if (compressed_point_size == 0) | |
1179 | return log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to convert a EC point to compressed format"); | |
1180 | ||
1181 | *ret_compressed_point = TAKE_PTR(compressed_point); | |
1182 | *ret_compressed_point_size = compressed_point_size; | |
1183 | return 0; | |
1184 | } | |
1185 | #endif | |
1186 | ||
3d05c058 VS |
1187 | /* Since EC keys doesn't support encryption directly, we use ECDH protocol to derive shared secret here. |
1188 | * We use PKCS#11 C_DeriveKey function to derive a shared secret with a private key stored in the token and | |
1189 | * a public key saved on enrollment. */ | |
1190 | static int pkcs11_token_decrypt_data_ecc( | |
1191 | CK_FUNCTION_LIST *m, | |
1192 | CK_SESSION_HANDLE session, | |
1193 | CK_OBJECT_HANDLE object, | |
1194 | const void *encrypted_data, | |
1195 | size_t encrypted_data_size, | |
1196 | void **ret_decrypted_data, | |
1197 | size_t *ret_decrypted_data_size) { | |
1198 | ||
1199 | static const CK_BBOOL yes = CK_TRUE, no = CK_FALSE; | |
1200 | static const CK_OBJECT_CLASS shared_secret_class = CKO_SECRET_KEY; | |
1201 | static const CK_KEY_TYPE shared_secret_type = CKK_GENERIC_SECRET; | |
1202 | static const CK_ATTRIBUTE shared_secret_template[] = { | |
1203 | { CKA_TOKEN, (void*) &no, sizeof(no) }, | |
1204 | { CKA_CLASS, (void*) &shared_secret_class, sizeof(shared_secret_class) }, | |
1205 | { CKA_KEY_TYPE, (void*) &shared_secret_type, sizeof(shared_secret_type) }, | |
1206 | { CKA_SENSITIVE, (void*) &no, sizeof(no) }, | |
1207 | { CKA_EXTRACTABLE, (void*) &yes, sizeof(yes) } | |
1208 | }; | |
1209 | CK_ECDH1_DERIVE_PARAMS params = { | |
1210 | .kdf = CKD_NULL, | |
1211 | .pPublicData = (void*) encrypted_data, | |
1212 | .ulPublicDataLen = encrypted_data_size | |
1213 | }; | |
1214 | CK_MECHANISM mechanism = { | |
1215 | .mechanism = CKM_ECDH1_DERIVE, | |
1216 | .pParameter = ¶ms, | |
1217 | .ulParameterLen = sizeof(params) | |
1218 | }; | |
1219 | CK_OBJECT_HANDLE shared_secret_handle; | |
06b77382 VS |
1220 | CK_SESSION_INFO session_info; |
1221 | CK_MECHANISM_INFO mechanism_info; | |
3d05c058 | 1222 | CK_RV rv, rv2; |
06b77382 VS |
1223 | #if HAVE_OPENSSL |
1224 | _cleanup_free_ void *compressed_point = NULL; | |
1225 | int r; | |
1226 | #endif | |
1227 | ||
1228 | rv = m->C_GetSessionInfo(session, &session_info); | |
1229 | if (rv != CKR_OK) | |
1230 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
1231 | "Failed to get information about the PKCS#11 session: %s", sym_p11_kit_strerror(rv)); | |
1232 | ||
1233 | rv = m->C_GetMechanismInfo(session_info.slotID, CKM_ECDH1_DERIVE, &mechanism_info); | |
1234 | if (rv != CKR_OK) | |
1235 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
1236 | "Failed to get information about CKM_ECDH1_DERIVE: %s", sym_p11_kit_strerror(rv)); | |
1237 | ||
1238 | if (!(mechanism_info.flags & CKF_EC_UNCOMPRESS)) { | |
1239 | if (mechanism_info.flags & CKF_EC_COMPRESS) { | |
1240 | #if HAVE_OPENSSL | |
1241 | log_debug("CKM_ECDH1_DERIVE accepts compressed EC points only, trying to convert."); | |
0a87b834 | 1242 | size_t compressed_point_size = 0; /* Explicit initialization to appease gcc */ |
06b77382 VS |
1243 | r = ecc_convert_to_compressed(m, session, object, encrypted_data, encrypted_data_size, &compressed_point, &compressed_point_size); |
1244 | if (r < 0) | |
1245 | return r; | |
1246 | ||
1247 | params.pPublicData = compressed_point; | |
1248 | params.ulPublicDataLen = compressed_point_size; | |
1249 | #else | |
1250 | return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), | |
1251 | "CKM_ECDH1_DERIVE does not support uncompressed format of EC points"); | |
1252 | #endif | |
1253 | } else | |
1254 | log_debug("Both CKF_EC_UNCOMPRESS and CKF_EC_COMPRESS are false for CKM_ECDH1_DERIVE, ignoring."); | |
1255 | } | |
3d05c058 VS |
1256 | |
1257 | rv = m->C_DeriveKey(session, &mechanism, object, (CK_ATTRIBUTE*) shared_secret_template, ELEMENTSOF(shared_secret_template), &shared_secret_handle); | |
1258 | if (rv != CKR_OK) | |
1259 | return log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to derive a shared secret: %s", sym_p11_kit_strerror(rv)); | |
1260 | ||
1261 | CK_ATTRIBUTE shared_secret_attr = { CKA_VALUE, NULL_PTR, 0}; | |
1262 | ||
1263 | rv = m->C_GetAttributeValue(session, shared_secret_handle, &shared_secret_attr, 1); | |
1264 | if (rv != CKR_OK) { | |
1265 | rv2 = m->C_DestroyObject(session, shared_secret_handle); | |
1266 | if (rv2 != CKR_OK) | |
1267 | log_warning("Failed to destroy a shared secret, ignoring: %s", sym_p11_kit_strerror(rv2)); | |
1268 | return log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to retrieve shared secret length: %s", sym_p11_kit_strerror(rv)); | |
1269 | } | |
1270 | ||
1271 | shared_secret_attr.pValue = malloc(shared_secret_attr.ulValueLen); | |
1272 | if (!shared_secret_attr.pValue) | |
1273 | return log_oom(); | |
1274 | ||
1275 | rv = m->C_GetAttributeValue(session, shared_secret_handle, &shared_secret_attr, 1); | |
1276 | rv2 = m->C_DestroyObject(session, shared_secret_handle); | |
1277 | if (rv2 != CKR_OK) | |
1278 | log_warning("Failed to destroy a shared secret, ignoring: %s", sym_p11_kit_strerror(rv2)); | |
1279 | ||
1280 | if (rv != CKR_OK) { | |
1281 | erase_and_free(shared_secret_attr.pValue); | |
1282 | return log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to retrieve a shared secret: %s", sym_p11_kit_strerror(rv)); | |
1283 | } | |
1284 | ||
1285 | log_info("Successfully derived key with security token."); | |
1286 | ||
1287 | *ret_decrypted_data = shared_secret_attr.pValue; | |
1288 | *ret_decrypted_data_size = shared_secret_attr.ulValueLen; | |
1289 | return 0; | |
1290 | } | |
1291 | ||
1292 | static int pkcs11_token_decrypt_data_rsa( | |
839fddbe LP |
1293 | CK_FUNCTION_LIST *m, |
1294 | CK_SESSION_HANDLE session, | |
1295 | CK_OBJECT_HANDLE object, | |
1296 | const void *encrypted_data, | |
1297 | size_t encrypted_data_size, | |
1298 | void **ret_decrypted_data, | |
1299 | size_t *ret_decrypted_data_size) { | |
1300 | ||
1301 | static const CK_MECHANISM mechanism = { | |
1302 | .mechanism = CKM_RSA_PKCS | |
1303 | }; | |
1304 | _cleanup_(erase_and_freep) CK_BYTE *dbuffer = NULL; | |
1305 | CK_ULONG dbuffer_size = 0; | |
1306 | CK_RV rv; | |
da035a3a | 1307 | |
839fddbe LP |
1308 | rv = m->C_DecryptInit(session, (CK_MECHANISM*) &mechanism, object); |
1309 | if (rv != CKR_OK) | |
1310 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
da035a3a | 1311 | "Failed to initialize decryption on security token: %s", sym_p11_kit_strerror(rv)); |
839fddbe LP |
1312 | |
1313 | dbuffer_size = encrypted_data_size; /* Start with something reasonable */ | |
1314 | dbuffer = malloc(dbuffer_size); | |
1315 | if (!dbuffer) | |
1316 | return log_oom(); | |
1317 | ||
1318 | rv = m->C_Decrypt(session, (CK_BYTE*) encrypted_data, encrypted_data_size, dbuffer, &dbuffer_size); | |
1319 | if (rv == CKR_BUFFER_TOO_SMALL) { | |
1320 | erase_and_free(dbuffer); | |
1321 | ||
1322 | dbuffer = malloc(dbuffer_size); | |
1323 | if (!dbuffer) | |
1324 | return log_oom(); | |
1325 | ||
1326 | rv = m->C_Decrypt(session, (CK_BYTE*) encrypted_data, encrypted_data_size, dbuffer, &dbuffer_size); | |
1327 | } | |
1328 | if (rv != CKR_OK) | |
1329 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
da035a3a | 1330 | "Failed to decrypt key on security token: %s", sym_p11_kit_strerror(rv)); |
839fddbe LP |
1331 | |
1332 | log_info("Successfully decrypted key with security token."); | |
1333 | ||
1334 | *ret_decrypted_data = TAKE_PTR(dbuffer); | |
1335 | *ret_decrypted_data_size = dbuffer_size; | |
1336 | return 0; | |
1337 | } | |
1338 | ||
3d05c058 VS |
1339 | int pkcs11_token_decrypt_data( |
1340 | CK_FUNCTION_LIST *m, | |
1341 | CK_SESSION_HANDLE session, | |
1342 | CK_OBJECT_HANDLE object, | |
1343 | const void *encrypted_data, | |
1344 | size_t encrypted_data_size, | |
1345 | void **ret_decrypted_data, | |
1346 | size_t *ret_decrypted_data_size) { | |
1347 | ||
1348 | CK_KEY_TYPE key_type; | |
1349 | CK_ATTRIBUTE key_type_template = { CKA_KEY_TYPE, &key_type, sizeof(key_type) }; | |
1350 | CK_RV rv; | |
1351 | ||
1352 | assert(m); | |
1353 | assert(encrypted_data); | |
1354 | assert(encrypted_data_size > 0); | |
1355 | assert(ret_decrypted_data); | |
1356 | assert(ret_decrypted_data_size); | |
1357 | ||
1358 | rv = m->C_GetAttributeValue(session, object, &key_type_template, 1); | |
1359 | if (rv != CKR_OK) | |
1360 | return log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to retrieve private key type"); | |
1361 | ||
1362 | switch (key_type) { | |
1363 | ||
1364 | case CKK_RSA: | |
1365 | return pkcs11_token_decrypt_data_rsa(m, session, object, encrypted_data, encrypted_data_size, ret_decrypted_data, ret_decrypted_data_size); | |
1366 | ||
1367 | case CKK_EC: | |
1368 | return pkcs11_token_decrypt_data_ecc(m, session, object, encrypted_data, encrypted_data_size, ret_decrypted_data, ret_decrypted_data_size); | |
1369 | ||
1370 | default: | |
1371 | return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), "Unsupported private key type: %lu", key_type); | |
1372 | } | |
1373 | } | |
1374 | ||
839fddbe LP |
1375 | int pkcs11_token_acquire_rng( |
1376 | CK_FUNCTION_LIST *m, | |
1377 | CK_SESSION_HANDLE session) { | |
1378 | ||
1379 | _cleanup_free_ void *buffer = NULL; | |
839fddbe LP |
1380 | size_t rps; |
1381 | CK_RV rv; | |
1382 | int r; | |
1383 | ||
1384 | assert(m); | |
1385 | ||
da035a3a LB |
1386 | r = dlopen_p11kit(); |
1387 | if (r < 0) | |
1388 | return r; | |
1389 | ||
839fddbe LP |
1390 | /* While we are at it, let's read some RNG data from the PKCS#11 token and pass it to the kernel |
1391 | * random pool. This should be cheap if we are talking to the device already. Note that we don't | |
1392 | * credit any entropy, since we don't know about the quality of the pkcs#11 token's RNG. Why bother | |
1393 | * at all? There are two sides to the argument whether to generate private keys on tokens or on the | |
1394 | * host. By crediting some data from the token RNG to the host's pool we at least can say that any | |
1395 | * key generated from it is at least as good as both sources individually. */ | |
1396 | ||
1397 | rps = random_pool_size(); | |
1398 | ||
1399 | buffer = malloc(rps); | |
1400 | if (!buffer) | |
1401 | return log_oom(); | |
1402 | ||
1403 | rv = m->C_GenerateRandom(session, buffer, rps); | |
1404 | if (rv != CKR_OK) | |
1405 | return log_debug_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), | |
da035a3a | 1406 | "Failed to generate RNG data on security token: %s", sym_p11_kit_strerror(rv)); |
839fddbe | 1407 | |
61bd7d1e | 1408 | r = random_write_entropy(-1, buffer, rps, false); |
839fddbe LP |
1409 | if (r < 0) |
1410 | return log_debug_errno(r, "Failed to write PKCS#11 acquired random data to /dev/urandom: %m"); | |
1411 | ||
1412 | log_debug("Successfully written %zu bytes random data acquired via PKCS#11 to kernel random pool.", rps); | |
1413 | ||
1414 | return 0; | |
1415 | } | |
1416 | ||
1417 | static int token_process( | |
1418 | CK_FUNCTION_LIST *m, | |
1419 | CK_SLOT_ID slotid, | |
1420 | const CK_SLOT_INFO *slot_info, | |
1421 | const CK_TOKEN_INFO *token_info, | |
1422 | P11KitUri *search_uri, | |
1423 | pkcs11_find_token_callback_t callback, | |
1424 | void *userdata) { | |
1425 | ||
1426 | _cleanup_free_ char *token_label = NULL; | |
1427 | CK_SESSION_HANDLE session; | |
1428 | CK_RV rv; | |
1429 | int r; | |
1430 | ||
1431 | assert(m); | |
1432 | assert(slot_info); | |
1433 | assert(token_info); | |
839fddbe LP |
1434 | |
1435 | token_label = pkcs11_token_label(token_info); | |
1436 | if (!token_label) | |
1437 | return log_oom(); | |
1438 | ||
1439 | rv = m->C_OpenSession(slotid, CKF_SERIAL_SESSION, NULL, NULL, &session); | |
1440 | if (rv != CKR_OK) | |
1441 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
da035a3a | 1442 | "Failed to create session for security token '%s': %s", token_label, sym_p11_kit_strerror(rv)); |
839fddbe LP |
1443 | |
1444 | if (callback) | |
1445 | r = callback(m, session, slotid, slot_info, token_info, search_uri, userdata); | |
1446 | else | |
1447 | r = 1; /* if not callback was specified, just say we found what we were looking for */ | |
1448 | ||
1449 | rv = m->C_CloseSession(session); | |
1450 | if (rv != CKR_OK) | |
da035a3a | 1451 | log_warning("Failed to close session on PKCS#11 token, ignoring: %s", sym_p11_kit_strerror(rv)); |
839fddbe LP |
1452 | |
1453 | return r; | |
1454 | } | |
1455 | ||
1456 | static int slot_process( | |
1457 | CK_FUNCTION_LIST *m, | |
1458 | CK_SLOT_ID slotid, | |
1459 | P11KitUri *search_uri, | |
1460 | pkcs11_find_token_callback_t callback, | |
1461 | void *userdata) { | |
1462 | ||
da035a3a | 1463 | _cleanup_(sym_p11_kit_uri_freep) P11KitUri* slot_uri = NULL, *token_uri = NULL; |
839fddbe LP |
1464 | _cleanup_free_ char *token_uri_string = NULL; |
1465 | CK_TOKEN_INFO token_info; | |
1466 | CK_SLOT_INFO slot_info; | |
da035a3a | 1467 | int uri_result, r; |
839fddbe LP |
1468 | CK_RV rv; |
1469 | ||
1470 | assert(m); | |
839fddbe | 1471 | |
da035a3a LB |
1472 | r = dlopen_p11kit(); |
1473 | if (r < 0) | |
1474 | return r; | |
1475 | ||
839fddbe LP |
1476 | /* We return -EAGAIN for all failures we can attribute to a specific slot in some way, so that the |
1477 | * caller might try other slots before giving up. */ | |
1478 | ||
1479 | rv = m->C_GetSlotInfo(slotid, &slot_info); | |
1480 | if (rv != CKR_OK) { | |
da035a3a | 1481 | log_warning("Failed to acquire slot info for slot %lu, ignoring slot: %s", slotid, sym_p11_kit_strerror(rv)); |
839fddbe LP |
1482 | return -EAGAIN; |
1483 | } | |
1484 | ||
1485 | slot_uri = uri_from_slot_info(&slot_info); | |
1486 | if (!slot_uri) | |
1487 | return log_oom(); | |
1488 | ||
1489 | if (DEBUG_LOGGING) { | |
1490 | _cleanup_free_ char *slot_uri_string = NULL; | |
1491 | ||
da035a3a | 1492 | uri_result = sym_p11_kit_uri_format(slot_uri, P11_KIT_URI_FOR_ANY, &slot_uri_string); |
839fddbe | 1493 | if (uri_result != P11_KIT_URI_OK) { |
da035a3a | 1494 | log_warning("Failed to format slot URI, ignoring slot: %s", sym_p11_kit_uri_message(uri_result)); |
839fddbe LP |
1495 | return -EAGAIN; |
1496 | } | |
1497 | ||
1498 | log_debug("Found slot with URI %s", slot_uri_string); | |
1499 | } | |
1500 | ||
1501 | rv = m->C_GetTokenInfo(slotid, &token_info); | |
1502 | if (rv == CKR_TOKEN_NOT_PRESENT) { | |
d7a0f1f4 FS |
1503 | return log_debug_errno(SYNTHETIC_ERRNO(EAGAIN), |
1504 | "Token not present in slot, ignoring."); | |
839fddbe | 1505 | } else if (rv != CKR_OK) { |
da035a3a | 1506 | log_warning("Failed to acquire token info for slot %lu, ignoring slot: %s", slotid, sym_p11_kit_strerror(rv)); |
839fddbe LP |
1507 | return -EAGAIN; |
1508 | } | |
1509 | ||
1510 | token_uri = uri_from_token_info(&token_info); | |
1511 | if (!token_uri) | |
1512 | return log_oom(); | |
1513 | ||
da035a3a | 1514 | uri_result = sym_p11_kit_uri_format(token_uri, P11_KIT_URI_FOR_ANY, &token_uri_string); |
839fddbe | 1515 | if (uri_result != P11_KIT_URI_OK) { |
da035a3a | 1516 | log_warning("Failed to format slot URI: %s", sym_p11_kit_uri_message(uri_result)); |
839fddbe LP |
1517 | return -EAGAIN; |
1518 | } | |
1519 | ||
da035a3a | 1520 | if (search_uri && !sym_p11_kit_uri_match_token_info(search_uri, &token_info)) |
d7a0f1f4 FS |
1521 | return log_debug_errno(SYNTHETIC_ERRNO(EAGAIN), |
1522 | "Found non-matching token with URI %s.", | |
1523 | token_uri_string); | |
839fddbe LP |
1524 | |
1525 | log_debug("Found matching token with URI %s.", token_uri_string); | |
1526 | ||
1527 | return token_process( | |
1528 | m, | |
1529 | slotid, | |
1530 | &slot_info, | |
1531 | &token_info, | |
1532 | search_uri, | |
1533 | callback, | |
1534 | userdata); | |
1535 | } | |
1536 | ||
1537 | static int module_process( | |
1538 | CK_FUNCTION_LIST *m, | |
1539 | P11KitUri *search_uri, | |
1540 | pkcs11_find_token_callback_t callback, | |
1541 | void *userdata) { | |
1542 | ||
da035a3a | 1543 | _cleanup_(sym_p11_kit_uri_freep) P11KitUri* module_uri = NULL; |
839fddbe | 1544 | _cleanup_free_ char *name = NULL, *module_uri_string = NULL; |
839fddbe LP |
1545 | _cleanup_free_ CK_SLOT_ID *slotids = NULL; |
1546 | CK_ULONG n_slotids = 0; | |
1547 | int uri_result; | |
1548 | CK_INFO info; | |
1549 | size_t k; | |
1550 | CK_RV rv; | |
1551 | int r; | |
1552 | ||
1553 | assert(m); | |
839fddbe | 1554 | |
da035a3a LB |
1555 | r = dlopen_p11kit(); |
1556 | if (r < 0) | |
1557 | return r; | |
1558 | ||
839fddbe LP |
1559 | /* We ignore most errors from modules here, in order to skip over faulty modules: one faulty module |
1560 | * should not have the effect that we don't try the others anymore. We indicate such per-module | |
1561 | * failures with -EAGAIN, which let's the caller try the next module. */ | |
1562 | ||
da035a3a | 1563 | name = sym_p11_kit_module_get_name(m); |
839fddbe LP |
1564 | if (!name) |
1565 | return log_oom(); | |
1566 | ||
1567 | log_debug("Trying PKCS#11 module %s.", name); | |
1568 | ||
1569 | rv = m->C_GetInfo(&info); | |
1570 | if (rv != CKR_OK) { | |
da035a3a | 1571 | log_warning("Failed to get info on PKCS#11 module, ignoring module: %s", sym_p11_kit_strerror(rv)); |
839fddbe LP |
1572 | return -EAGAIN; |
1573 | } | |
1574 | ||
1575 | module_uri = uri_from_module_info(&info); | |
1576 | if (!module_uri) | |
1577 | return log_oom(); | |
1578 | ||
da035a3a | 1579 | uri_result = sym_p11_kit_uri_format(module_uri, P11_KIT_URI_FOR_ANY, &module_uri_string); |
839fddbe | 1580 | if (uri_result != P11_KIT_URI_OK) { |
da035a3a | 1581 | log_warning("Failed to format module URI, ignoring module: %s", sym_p11_kit_uri_message(uri_result)); |
839fddbe LP |
1582 | return -EAGAIN; |
1583 | } | |
1584 | ||
1585 | log_debug("Found module with URI %s", module_uri_string); | |
1586 | ||
1587 | rv = pkcs11_get_slot_list_malloc(m, &slotids, &n_slotids); | |
1588 | if (rv != CKR_OK) { | |
da035a3a | 1589 | log_warning("Failed to get slot list, ignoring module: %s", sym_p11_kit_strerror(rv)); |
839fddbe LP |
1590 | return -EAGAIN; |
1591 | } | |
d7a0f1f4 FS |
1592 | if (n_slotids == 0) |
1593 | return log_debug_errno(SYNTHETIC_ERRNO(EAGAIN), | |
1594 | "This module has no slots? Ignoring module."); | |
839fddbe LP |
1595 | |
1596 | for (k = 0; k < n_slotids; k++) { | |
1597 | r = slot_process( | |
1598 | m, | |
1599 | slotids[k], | |
1600 | search_uri, | |
1601 | callback, | |
1602 | userdata); | |
1603 | if (r != -EAGAIN) | |
1604 | return r; | |
1605 | } | |
1606 | ||
1607 | return -EAGAIN; | |
1608 | } | |
1609 | ||
1610 | int pkcs11_find_token( | |
1611 | const char *pkcs11_uri, | |
1612 | pkcs11_find_token_callback_t callback, | |
1613 | void *userdata) { | |
1614 | ||
da035a3a LB |
1615 | _cleanup_(sym_p11_kit_modules_finalize_and_releasep) CK_FUNCTION_LIST **modules = NULL; |
1616 | _cleanup_(sym_p11_kit_uri_freep) P11KitUri *search_uri = NULL; | |
839fddbe LP |
1617 | int r; |
1618 | ||
da035a3a LB |
1619 | r = dlopen_p11kit(); |
1620 | if (r < 0) | |
1621 | return r; | |
1622 | ||
839fddbe LP |
1623 | /* Execute the specified callback for each matching token found. If nothing is found returns |
1624 | * -EAGAIN. Logs about all errors, except for EAGAIN, which the caller has to log about. */ | |
1625 | ||
0eb3be46 LP |
1626 | if (pkcs11_uri) { |
1627 | r = uri_from_string(pkcs11_uri, &search_uri); | |
1628 | if (r < 0) | |
1629 | return log_error_errno(r, "Failed to parse PKCS#11 URI '%s': %m", pkcs11_uri); | |
1630 | } | |
839fddbe | 1631 | |
da035a3a | 1632 | modules = sym_p11_kit_modules_load_and_initialize(0); |
839fddbe LP |
1633 | if (!modules) |
1634 | return log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to initialize pkcs11 modules"); | |
1635 | ||
1636 | for (CK_FUNCTION_LIST **i = modules; *i; i++) { | |
1637 | r = module_process( | |
1638 | *i, | |
1639 | search_uri, | |
1640 | callback, | |
1641 | userdata); | |
1642 | if (r != -EAGAIN) | |
1643 | return r; | |
1644 | } | |
1645 | ||
1646 | return -EAGAIN; | |
1647 | } | |
1648 | ||
2289a784 | 1649 | #if HAVE_OPENSSL |
85686b37 | 1650 | struct pkcs11_acquire_public_key_callback_data { |
2289a784 | 1651 | char *pin_used; |
85686b37 | 1652 | EVP_PKEY *pkey; |
a96c284f | 1653 | const char *askpw_friendly_name, *askpw_icon, *askpw_credential; |
a758a128 | 1654 | AskPasswordFlags askpw_flags; |
2289a784 LP |
1655 | }; |
1656 | ||
85686b37 | 1657 | static void pkcs11_acquire_public_key_callback_data_release(struct pkcs11_acquire_public_key_callback_data *data) { |
2289a784 | 1658 | erase_and_free(data->pin_used); |
85686b37 | 1659 | EVP_PKEY_free(data->pkey); |
2289a784 LP |
1660 | } |
1661 | ||
85686b37 | 1662 | static int pkcs11_acquire_public_key_callback( |
2289a784 LP |
1663 | CK_FUNCTION_LIST *m, |
1664 | CK_SESSION_HANDLE session, | |
1665 | CK_SLOT_ID slot_id, | |
1666 | const CK_SLOT_INFO *slot_info, | |
1667 | const CK_TOKEN_INFO *token_info, | |
1668 | P11KitUri *uri, | |
1669 | void *userdata) { | |
1670 | ||
1671 | _cleanup_(erase_and_freep) char *pin_used = NULL; | |
85686b37 VS |
1672 | _cleanup_(EVP_PKEY_freep) EVP_PKEY *pkey = NULL; |
1673 | CK_OBJECT_CLASS class; | |
1674 | CK_CERTIFICATE_TYPE type; | |
1675 | CK_ATTRIBUTE candidate_attributes[] = { | |
1676 | { CKA_CLASS, &class, sizeof(class) }, | |
1677 | { CKA_CERTIFICATE_TYPE, &type, sizeof(type) }, | |
1678 | }; | |
1679 | CK_OBJECT_HANDLE candidate, public_key = CK_INVALID_HANDLE, certificate = CK_INVALID_HANDLE; | |
1680 | uint8_t n_public_keys = 0, n_certificates = 0; | |
1681 | CK_RV rv; | |
2289a784 LP |
1682 | int r; |
1683 | ||
1684 | assert(m); | |
1685 | assert(slot_info); | |
1686 | assert(token_info); | |
1687 | assert(uri); | |
2289a784 | 1688 | |
85686b37 VS |
1689 | struct pkcs11_acquire_public_key_callback_data *data = ASSERT_PTR(userdata); |
1690 | ||
2289a784 LP |
1691 | /* Called for every token matching our URI */ |
1692 | ||
a758a128 LP |
1693 | r = pkcs11_token_login( |
1694 | m, | |
1695 | session, | |
1696 | slot_id, | |
1697 | token_info, | |
1698 | data->askpw_friendly_name, | |
a96c284f | 1699 | data->askpw_icon, |
a758a128 | 1700 | "pkcs11-pin", |
a96c284f | 1701 | data->askpw_credential, |
a758a128 LP |
1702 | UINT64_MAX, |
1703 | data->askpw_flags, | |
a758a128 | 1704 | &pin_used); |
2289a784 LP |
1705 | if (r < 0) |
1706 | return r; | |
1707 | ||
85686b37 VS |
1708 | CK_ULONG n_attributes; |
1709 | CK_ATTRIBUTE *attributes = sym_p11_kit_uri_get_attributes(uri, &n_attributes); | |
1710 | for (CK_ULONG i = 0; i < n_attributes; i++) { | |
1711 | switch (attributes[i].type) { | |
1712 | case CKA_CLASS: { | |
1713 | CK_OBJECT_CLASS requested_class = *((CK_OBJECT_CLASS*) attributes[i].pValue); | |
1714 | if (requested_class != CKO_PUBLIC_KEY && requested_class != CKO_CERTIFICATE) | |
1715 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
1716 | "Selected PKCS#11 object is not a public key or certificate, refusing."); | |
1717 | break; | |
1718 | } | |
2289a784 | 1719 | |
85686b37 VS |
1720 | case CKA_CERTIFICATE_TYPE: { |
1721 | CK_CERTIFICATE_TYPE requested_type = *((CK_CERTIFICATE_TYPE*) attributes[i].pValue); | |
1722 | if (requested_type != CKC_X_509) | |
1723 | return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), "Selected PKCS#11 object is not an X.509 certificate, refusing."); | |
1724 | break; | |
1725 | }} | |
1726 | } | |
1727 | ||
1728 | rv = m->C_FindObjectsInit(session, attributes, n_attributes); | |
1729 | if (rv != CKR_OK) | |
1730 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
1731 | "Failed to initialize object find call: %s", sym_p11_kit_strerror(rv)); | |
2289a784 | 1732 | |
85686b37 VS |
1733 | for (;;) { |
1734 | CK_ULONG n; | |
1735 | rv = m->C_FindObjects(session, &candidate, 1, &n); | |
1736 | if (rv != CKR_OK) | |
1737 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
1738 | "Failed to find objects: %s", sym_p11_kit_strerror(rv)); | |
1739 | ||
1740 | if (n == 0) | |
1741 | break; | |
1742 | ||
1743 | candidate_attributes[0].ulValueLen = sizeof(class); | |
1744 | candidate_attributes[1].ulValueLen = sizeof(type); | |
1745 | rv = m->C_GetAttributeValue(session, candidate, candidate_attributes, ELEMENTSOF(candidate_attributes)); | |
1746 | if (rv != CKR_OK && rv != CKR_ATTRIBUTE_TYPE_INVALID) | |
1747 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
1748 | "Failed to get attributes of a selected candidate: %s", sym_p11_kit_strerror(rv)); | |
1749 | ||
1750 | if (candidate_attributes[0].ulValueLen == CK_UNAVAILABLE_INFORMATION) { | |
1751 | log_debug("Failed to get CKA_CLASS of a selected candidate"); | |
1752 | continue; | |
1753 | } | |
1754 | ||
1755 | if (class == CKO_PUBLIC_KEY) { | |
1756 | n_public_keys++; | |
1757 | if (n_public_keys > 1) | |
1758 | break; | |
1759 | public_key = candidate; | |
1760 | continue; | |
1761 | } | |
1762 | ||
1763 | if (class == CKO_CERTIFICATE) { | |
1764 | if (candidate_attributes[1].ulValueLen == CK_UNAVAILABLE_INFORMATION) { | |
1765 | log_debug("Failed to get CKA_CERTIFICATE_TYPE of a selected candidate"); | |
1766 | continue; | |
1767 | } | |
1768 | if (type != CKC_X_509) | |
1769 | continue; | |
1770 | n_certificates++; | |
1771 | if (n_certificates > 1) | |
1772 | break; | |
1773 | certificate = candidate; | |
1774 | continue; | |
1775 | } | |
1776 | } | |
1777 | ||
1778 | rv = m->C_FindObjectsFinal(session); | |
1779 | if (rv != CKR_OK) | |
1780 | return log_error_errno(SYNTHETIC_ERRNO(EIO), | |
1781 | "Failed to finalize object find call: %s", sym_p11_kit_strerror(rv)); | |
1782 | ||
1783 | if (n_public_keys == 0 && n_certificates == 0) | |
1784 | return log_error_errno(SYNTHETIC_ERRNO(ENOENT), | |
1785 | "Failed to find selected public key or X.509 certificate."); | |
1786 | ||
1787 | if (n_public_keys > 1) | |
1788 | return log_error_errno(SYNTHETIC_ERRNO(ENOTUNIQ), | |
1789 | "Provided URI matches multiple public keys, refusing."); | |
1790 | ||
1791 | if (n_certificates > 1) | |
1792 | return log_error_errno(SYNTHETIC_ERRNO(ENOTUNIQ), | |
1793 | "Provided URI matches multiple certificates, refusing."); | |
1794 | ||
1795 | if (n_public_keys != 0) { | |
1796 | r = pkcs11_token_read_public_key(m, session, public_key, &pkey); | |
1797 | if (r >= 0) | |
1798 | goto success; | |
1799 | } | |
1800 | ||
1801 | if (n_certificates == 0) | |
1802 | return log_error_errno(r, "Failed to read a found public key."); | |
1803 | ||
1804 | { | |
1805 | _cleanup_(X509_freep) X509 *cert = NULL; | |
1806 | ||
1807 | r = pkcs11_token_read_x509_certificate(m, session, certificate, &cert); | |
1808 | if (r < 0) | |
1809 | return log_error_errno(r, "Failed to read a found X.509 certificate."); | |
1810 | ||
1811 | pkey = X509_get_pubkey(cert); | |
1812 | if (!pkey) | |
1813 | return log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to extract public key from X.509 certificate."); | |
1814 | } | |
1815 | success: | |
2289a784 LP |
1816 | /* Let's read some random data off the token and write it to the kernel pool before we generate our |
1817 | * random key from it. This way we can claim the quality of the RNG is at least as good as the | |
1818 | * kernel's and the token's pool */ | |
1819 | (void) pkcs11_token_acquire_rng(m, session); | |
1820 | ||
1821 | data->pin_used = TAKE_PTR(pin_used); | |
85686b37 VS |
1822 | data->pkey = TAKE_PTR(pkey); |
1823 | return 0; | |
2289a784 LP |
1824 | } |
1825 | ||
85686b37 | 1826 | int pkcs11_acquire_public_key( |
2289a784 LP |
1827 | const char *uri, |
1828 | const char *askpw_friendly_name, | |
a96c284f LP |
1829 | const char *askpw_icon, |
1830 | const char *askpw_credential, | |
b2ac9280 | 1831 | AskPasswordFlags askpw_flags, |
85686b37 | 1832 | EVP_PKEY **ret_pkey, |
2289a784 LP |
1833 | char **ret_pin_used) { |
1834 | ||
85686b37 | 1835 | _cleanup_(pkcs11_acquire_public_key_callback_data_release) struct pkcs11_acquire_public_key_callback_data data = { |
2289a784 | 1836 | .askpw_friendly_name = askpw_friendly_name, |
a96c284f LP |
1837 | .askpw_icon = askpw_icon, |
1838 | .askpw_credential = askpw_credential, | |
b2ac9280 | 1839 | .askpw_flags = askpw_flags, |
2289a784 LP |
1840 | }; |
1841 | int r; | |
1842 | ||
1843 | assert(uri); | |
85686b37 | 1844 | assert(ret_pkey); |
2289a784 | 1845 | |
85686b37 | 1846 | r = pkcs11_find_token(uri, pkcs11_acquire_public_key_callback, &data); |
2289a784 LP |
1847 | if (r == -EAGAIN) /* pkcs11_find_token() doesn't log about this error, but all others */ |
1848 | return log_error_errno(SYNTHETIC_ERRNO(ENXIO), | |
1849 | "Specified PKCS#11 token with URI '%s' not found.", | |
1850 | uri); | |
1851 | if (r < 0) | |
1852 | return r; | |
1853 | ||
85686b37 | 1854 | *ret_pkey = TAKE_PTR(data.pkey); |
2289a784 LP |
1855 | if (ret_pin_used) |
1856 | *ret_pin_used = TAKE_PTR(data.pin_used); | |
2289a784 LP |
1857 | return 0; |
1858 | } | |
f240cbb6 LP |
1859 | #endif |
1860 | ||
1861 | static int list_callback( | |
1862 | CK_FUNCTION_LIST *m, | |
1863 | CK_SESSION_HANDLE session, | |
1864 | CK_SLOT_ID slot_id, | |
1865 | const CK_SLOT_INFO *slot_info, | |
1866 | const CK_TOKEN_INFO *token_info, | |
1867 | P11KitUri *uri, | |
1868 | void *userdata) { | |
1869 | ||
1870 | _cleanup_free_ char *token_uri_string = NULL, *token_label = NULL, *token_manufacturer_id = NULL, *token_model = NULL; | |
da035a3a | 1871 | _cleanup_(sym_p11_kit_uri_freep) P11KitUri *token_uri = NULL; |
f240cbb6 LP |
1872 | Table *t = userdata; |
1873 | int uri_result, r; | |
1874 | ||
1875 | assert(slot_info); | |
1876 | assert(token_info); | |
1877 | ||
da035a3a LB |
1878 | r = dlopen_p11kit(); |
1879 | if (r < 0) | |
1880 | return r; | |
1881 | ||
f240cbb6 LP |
1882 | /* We only care about hardware devices here with a token inserted. Let's filter everything else |
1883 | * out. (Note that the user can explicitly specify non-hardware tokens if they like, but during | |
1884 | * enumeration we'll filter those, since software tokens are typically the system certificate store | |
1885 | * and such, and it's typically not what people want to bind their home directories to.) */ | |
50079424 | 1886 | if (!FLAGS_SET(slot_info->flags, CKF_HW_SLOT|CKF_TOKEN_PRESENT)) |
f240cbb6 LP |
1887 | return -EAGAIN; |
1888 | ||
1889 | token_label = pkcs11_token_label(token_info); | |
1890 | if (!token_label) | |
1891 | return log_oom(); | |
1892 | ||
1893 | token_manufacturer_id = pkcs11_token_manufacturer_id(token_info); | |
1894 | if (!token_manufacturer_id) | |
1895 | return log_oom(); | |
1896 | ||
1897 | token_model = pkcs11_token_model(token_info); | |
1898 | if (!token_model) | |
1899 | return log_oom(); | |
1900 | ||
1901 | token_uri = uri_from_token_info(token_info); | |
1902 | if (!token_uri) | |
1903 | return log_oom(); | |
1904 | ||
da035a3a | 1905 | uri_result = sym_p11_kit_uri_format(token_uri, P11_KIT_URI_FOR_ANY, &token_uri_string); |
f240cbb6 | 1906 | if (uri_result != P11_KIT_URI_OK) |
da035a3a | 1907 | return log_warning_errno(SYNTHETIC_ERRNO(EAGAIN), "Failed to format slot URI: %s", sym_p11_kit_uri_message(uri_result)); |
f240cbb6 LP |
1908 | |
1909 | r = table_add_many( | |
1910 | t, | |
1911 | TABLE_STRING, token_uri_string, | |
1912 | TABLE_STRING, token_label, | |
1913 | TABLE_STRING, token_manufacturer_id, | |
1914 | TABLE_STRING, token_model); | |
1915 | if (r < 0) | |
1916 | return table_log_add_error(r); | |
1917 | ||
1918 | return -EAGAIN; /* keep scanning */ | |
1919 | } | |
1920 | #endif | |
1921 | ||
1922 | int pkcs11_list_tokens(void) { | |
1923 | #if HAVE_P11KIT | |
1924 | _cleanup_(table_unrefp) Table *t = NULL; | |
1925 | int r; | |
1926 | ||
1927 | t = table_new("uri", "label", "manufacturer", "model"); | |
1928 | if (!t) | |
1929 | return log_oom(); | |
1930 | ||
1931 | r = pkcs11_find_token(NULL, list_callback, t); | |
1932 | if (r < 0 && r != -EAGAIN) | |
1933 | return r; | |
2289a784 | 1934 | |
2413a0fa | 1935 | if (table_isempty(t)) { |
f240cbb6 LP |
1936 | log_info("No suitable PKCS#11 tokens found."); |
1937 | return 0; | |
1938 | } | |
1939 | ||
1940 | r = table_print(t, stdout); | |
1941 | if (r < 0) | |
1942 | return log_error_errno(r, "Failed to show device table: %m"); | |
1943 | ||
1944 | return 0; | |
1945 | #else | |
1946 | return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), | |
1947 | "PKCS#11 tokens not supported on this build."); | |
1948 | #endif | |
1949 | } | |
1950 | ||
1951 | #if HAVE_P11KIT | |
1952 | static int auto_callback( | |
1953 | CK_FUNCTION_LIST *m, | |
1954 | CK_SESSION_HANDLE session, | |
1955 | CK_SLOT_ID slot_id, | |
1956 | const CK_SLOT_INFO *slot_info, | |
1957 | const CK_TOKEN_INFO *token_info, | |
1958 | P11KitUri *uri, | |
1959 | void *userdata) { | |
1960 | ||
da035a3a | 1961 | _cleanup_(sym_p11_kit_uri_freep) P11KitUri *token_uri = NULL; |
f240cbb6 | 1962 | char **t = userdata; |
da035a3a | 1963 | int uri_result, r; |
f240cbb6 LP |
1964 | |
1965 | assert(slot_info); | |
1966 | assert(token_info); | |
1967 | ||
da035a3a LB |
1968 | r = dlopen_p11kit(); |
1969 | if (r < 0) | |
1970 | return r; | |
1971 | ||
f240cbb6 LP |
1972 | if (!FLAGS_SET(token_info->flags, CKF_HW_SLOT|CKF_TOKEN_PRESENT)) |
1973 | return -EAGAIN; | |
1974 | ||
1975 | if (*t) | |
1976 | return log_error_errno(SYNTHETIC_ERRNO(ENOTUNIQ), | |
1977 | "More than one suitable PKCS#11 token found."); | |
1978 | ||
1979 | token_uri = uri_from_token_info(token_info); | |
1980 | if (!token_uri) | |
1981 | return log_oom(); | |
1982 | ||
da035a3a | 1983 | uri_result = sym_p11_kit_uri_format(token_uri, P11_KIT_URI_FOR_ANY, t); |
f240cbb6 | 1984 | if (uri_result != P11_KIT_URI_OK) |
da035a3a | 1985 | return log_warning_errno(SYNTHETIC_ERRNO(EAGAIN), "Failed to format slot URI: %s", sym_p11_kit_uri_message(uri_result)); |
f240cbb6 LP |
1986 | |
1987 | return 0; | |
1988 | } | |
2289a784 | 1989 | #endif |
f240cbb6 LP |
1990 | |
1991 | int pkcs11_find_token_auto(char **ret) { | |
1992 | #if HAVE_P11KIT | |
1993 | int r; | |
1994 | ||
1995 | r = pkcs11_find_token(NULL, auto_callback, ret); | |
1996 | if (r == -EAGAIN) | |
1997 | return log_error_errno(SYNTHETIC_ERRNO(ENODEV), "No suitable PKCS#11 tokens found."); | |
1998 | if (r < 0) | |
1999 | return r; | |
2000 | ||
2001 | return 0; | |
2002 | #else | |
2003 | return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), | |
2004 | "PKCS#11 tokens not supported on this build."); | |
839fddbe | 2005 | #endif |
f240cbb6 | 2006 | } |
ed3d3af1 OK |
2007 | |
2008 | #if HAVE_P11KIT | |
2009 | void pkcs11_crypt_device_callback_data_release(pkcs11_crypt_device_callback_data *data) { | |
2010 | erase_and_free(data->decrypted_key); | |
2011 | ||
2012 | if (data->free_encrypted_key) | |
2013 | free(data->encrypted_key); | |
2014 | } | |
2015 | ||
2016 | int pkcs11_crypt_device_callback( | |
2017 | CK_FUNCTION_LIST *m, | |
2018 | CK_SESSION_HANDLE session, | |
2019 | CK_SLOT_ID slot_id, | |
2020 | const CK_SLOT_INFO *slot_info, | |
2021 | const CK_TOKEN_INFO *token_info, | |
2022 | P11KitUri *uri, | |
2023 | void *userdata) { | |
2024 | ||
99534007 | 2025 | pkcs11_crypt_device_callback_data *data = ASSERT_PTR(userdata); |
ed3d3af1 OK |
2026 | CK_OBJECT_HANDLE object; |
2027 | int r; | |
2028 | ||
2029 | assert(m); | |
2030 | assert(slot_info); | |
2031 | assert(token_info); | |
2032 | assert(uri); | |
ed3d3af1 OK |
2033 | |
2034 | /* Called for every token matching our URI */ | |
2035 | ||
2036 | r = pkcs11_token_login( | |
2037 | m, | |
2038 | session, | |
2039 | slot_id, | |
2040 | token_info, | |
2041 | data->friendly_name, | |
2042 | "drive-harddisk", | |
2043 | "pkcs11-pin", | |
a96c284f | 2044 | data->askpw_credential, |
ed3d3af1 | 2045 | data->until, |
a758a128 | 2046 | data->askpw_flags, |
ed3d3af1 OK |
2047 | NULL); |
2048 | if (r < 0) | |
2049 | return r; | |
2050 | ||
2051 | /* We are likely called during early boot, where entropy is scarce. Mix some data from the PKCS#11 | |
2052 | * token, if it supports that. It should be cheap, given that we already are talking to it anyway and | |
2053 | * shouldn't hurt. */ | |
2054 | (void) pkcs11_token_acquire_rng(m, session); | |
2055 | ||
2056 | r = pkcs11_token_find_private_key(m, session, uri, &object); | |
2057 | if (r < 0) | |
2058 | return r; | |
2059 | ||
2060 | r = pkcs11_token_decrypt_data( | |
2061 | m, | |
2062 | session, | |
2063 | object, | |
2064 | data->encrypted_key, | |
2065 | data->encrypted_key_size, | |
2066 | &data->decrypted_key, | |
2067 | &data->decrypted_key_size); | |
2068 | if (r < 0) | |
2069 | return r; | |
2070 | ||
2071 | return 0; | |
2072 | } | |
2073 | #endif |