1 /* $OpenBSD: ssh-pkcs11.c,v 1.54 2021/08/11 05:20:17 djm Exp $ */
2 /*
3 * Copyright (c) 2010 Markus Friedl. All rights reserved.
4 * Copyright (c) 2014 Pedro Martelletto. All rights reserved.
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include "includes.h"
20
21 #ifdef ENABLE_PKCS11
22
23 #ifdef HAVE_SYS_TIME_H
24 # include <sys/time.h>
25 #endif
26
27 #include <sys/types.h>
28 #include <stdarg.h>
29 #include <stdio.h>
30
31 #include <ctype.h>
32 #include <string.h>
33 #include <dlfcn.h>
34
35 #include "openbsd-compat/sys-queue.h"
36 #include "openbsd-compat/openssl-compat.h"
37
38 #include <openssl/ecdsa.h>
39 #include <openssl/x509.h>
40 #include <openssl/err.h>
41
42 #define CRYPTOKI_COMPAT
43 #include "pkcs11.h"
44
45 #include "log.h"
46 #include "misc.h"
47 #include "sshkey.h"
48 #include "ssh-pkcs11.h"
49 #include "digest.h"
50 #include "xmalloc.h"
51
52 struct pkcs11_slotinfo {
53 CK_TOKEN_INFO token;
54 CK_SESSION_HANDLE session;
55 int logged_in;
56 };
57
58 struct pkcs11_provider {
59 char *name;
60 void *handle;
61 CK_FUNCTION_LIST *function_list;
62 CK_INFO info;
63 CK_ULONG nslots;
64 CK_SLOT_ID *slotlist;
65 struct pkcs11_slotinfo *slotinfo;
66 int valid;
67 int refcount;
68 TAILQ_ENTRY(pkcs11_provider) next;
69 };
70
71 TAILQ_HEAD(, pkcs11_provider) pkcs11_providers;
72
73 struct pkcs11_key {
74 struct pkcs11_provider *provider;
75 CK_ULONG slotidx;
76 char *keyid;
77 int keyid_len;
78 };
79
80 int pkcs11_interactive = 0;
81
82 #ifdef HAVE_EC_KEY_METHOD_NEW
83 static void
ossl_error(const char * msg)84 ossl_error(const char *msg)
85 {
86 unsigned long e;
87
88 error_f("%s", msg);
89 while ((e = ERR_get_error()) != 0)
90 error_f("libcrypto error: %s", ERR_error_string(e, NULL));
91 }
92 #endif /* HAVE_EC_KEY_METHOD_NEW */
93
94 int
pkcs11_init(int interactive)95 pkcs11_init(int interactive)
96 {
97 pkcs11_interactive = interactive;
98 TAILQ_INIT(&pkcs11_providers);
99 return (0);
100 }
101
102 /*
103 * finalize a provider shared library, it's no longer usable.
104 * however, there might still be keys referencing this provider,
105 * so the actual freeing of memory is handled by pkcs11_provider_unref().
106 * this is called when a provider gets unregistered.
107 */
108 static void
pkcs11_provider_finalize(struct pkcs11_provider * p)109 pkcs11_provider_finalize(struct pkcs11_provider *p)
110 {
111 CK_RV rv;
112 CK_ULONG i;
113
114 debug_f("provider \"%s\" refcount %d valid %d",
115 p->name, p->refcount, p->valid);
116 if (!p->valid)
117 return;
118 for (i = 0; i < p->nslots; i++) {
119 if (p->slotinfo[i].session &&
120 (rv = p->function_list->C_CloseSession(
121 p->slotinfo[i].session)) != CKR_OK)
122 error("C_CloseSession failed: %lu", rv);
123 }
124 if ((rv = p->function_list->C_Finalize(NULL)) != CKR_OK)
125 error("C_Finalize failed: %lu", rv);
126 p->valid = 0;
127 p->function_list = NULL;
128 dlclose(p->handle);
129 }
130
131 /*
132 * remove a reference to the provider.
133 * called when a key gets destroyed or when the provider is unregistered.
134 */
135 static void
pkcs11_provider_unref(struct pkcs11_provider * p)136 pkcs11_provider_unref(struct pkcs11_provider *p)
137 {
138 debug_f("provider \"%s\" refcount %d", p->name, p->refcount);
139 if (--p->refcount <= 0) {
140 if (p->valid)
141 error_f("provider \"%s\" still valid", p->name);
142 free(p->name);
143 free(p->slotlist);
144 free(p->slotinfo);
145 free(p);
146 }
147 }
148
149 /* unregister all providers, keys might still point to the providers */
150 void
pkcs11_terminate(void)151 pkcs11_terminate(void)
152 {
153 struct pkcs11_provider *p;
154
155 while ((p = TAILQ_FIRST(&pkcs11_providers)) != NULL) {
156 TAILQ_REMOVE(&pkcs11_providers, p, next);
157 pkcs11_provider_finalize(p);
158 pkcs11_provider_unref(p);
159 }
160 }
161
162 /* lookup provider by name */
163 static struct pkcs11_provider *
pkcs11_provider_lookup(char * provider_id)164 pkcs11_provider_lookup(char *provider_id)
165 {
166 struct pkcs11_provider *p;
167
168 TAILQ_FOREACH(p, &pkcs11_providers, next) {
169 debug("check provider \"%s\"", p->name);
170 if (!strcmp(provider_id, p->name))
171 return (p);
172 }
173 return (NULL);
174 }
175
176 /* unregister provider by name */
177 int
pkcs11_del_provider(char * provider_id)178 pkcs11_del_provider(char *provider_id)
179 {
180 struct pkcs11_provider *p;
181
182 if ((p = pkcs11_provider_lookup(provider_id)) != NULL) {
183 TAILQ_REMOVE(&pkcs11_providers, p, next);
184 pkcs11_provider_finalize(p);
185 pkcs11_provider_unref(p);
186 return (0);
187 }
188 return (-1);
189 }
190
191 static RSA_METHOD *rsa_method;
192 static int rsa_idx = 0;
193 #ifdef HAVE_EC_KEY_METHOD_NEW
194 static EC_KEY_METHOD *ec_key_method;
195 static int ec_key_idx = 0;
196 #endif
197
198 /* release a wrapped object */
199 static void
pkcs11_k11_free(void * parent,void * ptr,CRYPTO_EX_DATA * ad,int idx,long argl,void * argp)200 pkcs11_k11_free(void *parent, void *ptr, CRYPTO_EX_DATA *ad, int idx,
201 long argl, void *argp)
202 {
203 struct pkcs11_key *k11 = ptr;
204
205 debug_f("parent %p ptr %p idx %d", parent, ptr, idx);
206 if (k11 == NULL)
207 return;
208 if (k11->provider)
209 pkcs11_provider_unref(k11->provider);
210 free(k11->keyid);
211 free(k11);
212 }
213
214 /* find a single 'obj' for given attributes */
215 static int
pkcs11_find(struct pkcs11_provider * p,CK_ULONG slotidx,CK_ATTRIBUTE * attr,CK_ULONG nattr,CK_OBJECT_HANDLE * obj)216 pkcs11_find(struct pkcs11_provider *p, CK_ULONG slotidx, CK_ATTRIBUTE *attr,
217 CK_ULONG nattr, CK_OBJECT_HANDLE *obj)
218 {
219 CK_FUNCTION_LIST *f;
220 CK_SESSION_HANDLE session;
221 CK_ULONG nfound = 0;
222 CK_RV rv;
223 int ret = -1;
224
225 f = p->function_list;
226 session = p->slotinfo[slotidx].session;
227 if ((rv = f->C_FindObjectsInit(session, attr, nattr)) != CKR_OK) {
228 error("C_FindObjectsInit failed (nattr %lu): %lu", nattr, rv);
229 return (-1);
230 }
231 if ((rv = f->C_FindObjects(session, obj, 1, &nfound)) != CKR_OK ||
232 nfound != 1) {
233 debug("C_FindObjects failed (nfound %lu nattr %lu): %lu",
234 nfound, nattr, rv);
235 } else
236 ret = 0;
237 if ((rv = f->C_FindObjectsFinal(session)) != CKR_OK)
238 error("C_FindObjectsFinal failed: %lu", rv);
239 return (ret);
240 }
241
242 static int
pkcs11_login_slot(struct pkcs11_provider * provider,struct pkcs11_slotinfo * si,CK_USER_TYPE type)243 pkcs11_login_slot(struct pkcs11_provider *provider, struct pkcs11_slotinfo *si,
244 CK_USER_TYPE type)
245 {
246 char *pin = NULL, prompt[1024];
247 CK_RV rv;
248
249 if (provider == NULL || si == NULL || !provider->valid) {
250 error("no pkcs11 (valid) provider found");
251 return (-1);
252 }
253
254 if (!pkcs11_interactive) {
255 error("need pin entry%s",
256 (si->token.flags & CKF_PROTECTED_AUTHENTICATION_PATH) ?
257 " on reader keypad" : "");
258 return (-1);
259 }
260 if (si->token.flags & CKF_PROTECTED_AUTHENTICATION_PATH)
261 verbose("Deferring PIN entry to reader keypad.");
262 else {
263 snprintf(prompt, sizeof(prompt), "Enter PIN for '%s': ",
264 si->token.label);
265 if ((pin = read_passphrase(prompt, RP_ALLOW_EOF)) == NULL) {
266 debug_f("no pin specified");
267 return (-1); /* bail out */
268 }
269 }
270 rv = provider->function_list->C_Login(si->session, type, (u_char *)pin,
271 (pin != NULL) ? strlen(pin) : 0);
272 if (pin != NULL)
273 freezero(pin, strlen(pin));
274
275 switch (rv) {
276 case CKR_OK:
277 case CKR_USER_ALREADY_LOGGED_IN:
278 /* success */
279 break;
280 case CKR_PIN_LEN_RANGE:
281 error("PKCS#11 login failed: PIN length out of range");
282 return -1;
283 case CKR_PIN_INCORRECT:
284 error("PKCS#11 login failed: PIN incorrect");
285 return -1;
286 case CKR_PIN_LOCKED:
287 error("PKCS#11 login failed: PIN locked");
288 return -1;
289 default:
290 error("PKCS#11 login failed: error %lu", rv);
291 return -1;
292 }
293 si->logged_in = 1;
294 return (0);
295 }
296
297 static int
pkcs11_login(struct pkcs11_key * k11,CK_USER_TYPE type)298 pkcs11_login(struct pkcs11_key *k11, CK_USER_TYPE type)
299 {
300 if (k11 == NULL || k11->provider == NULL || !k11->provider->valid) {
301 error("no pkcs11 (valid) provider found");
302 return (-1);
303 }
304
305 return pkcs11_login_slot(k11->provider,
306 &k11->provider->slotinfo[k11->slotidx], type);
307 }
308
309
310 static int
pkcs11_check_obj_bool_attrib(struct pkcs11_key * k11,CK_OBJECT_HANDLE obj,CK_ATTRIBUTE_TYPE type,int * val)311 pkcs11_check_obj_bool_attrib(struct pkcs11_key *k11, CK_OBJECT_HANDLE obj,
312 CK_ATTRIBUTE_TYPE type, int *val)
313 {
314 struct pkcs11_slotinfo *si;
315 CK_FUNCTION_LIST *f;
316 CK_BBOOL flag = 0;
317 CK_ATTRIBUTE attr;
318 CK_RV rv;
319
320 *val = 0;
321
322 if (!k11->provider || !k11->provider->valid) {
323 error("no pkcs11 (valid) provider found");
324 return (-1);
325 }
326
327 f = k11->provider->function_list;
328 si = &k11->provider->slotinfo[k11->slotidx];
329
330 attr.type = type;
331 attr.pValue = &flag;
332 attr.ulValueLen = sizeof(flag);
333
334 rv = f->C_GetAttributeValue(si->session, obj, &attr, 1);
335 if (rv != CKR_OK) {
336 error("C_GetAttributeValue failed: %lu", rv);
337 return (-1);
338 }
339 *val = flag != 0;
340 debug_f("provider \"%s\" slot %lu object %lu: attrib %lu = %d",
341 k11->provider->name, k11->slotidx, obj, type, *val);
342 return (0);
343 }
344
345 static int
pkcs11_get_key(struct pkcs11_key * k11,CK_MECHANISM_TYPE mech_type)346 pkcs11_get_key(struct pkcs11_key *k11, CK_MECHANISM_TYPE mech_type)
347 {
348 struct pkcs11_slotinfo *si;
349 CK_FUNCTION_LIST *f;
350 CK_OBJECT_HANDLE obj;
351 CK_RV rv;
352 CK_OBJECT_CLASS private_key_class;
353 CK_BBOOL true_val;
354 CK_MECHANISM mech;
355 CK_ATTRIBUTE key_filter[3];
356 int always_auth = 0;
357 int did_login = 0;
358
359 if (!k11->provider || !k11->provider->valid) {
360 error("no pkcs11 (valid) provider found");
361 return (-1);
362 }
363
364 f = k11->provider->function_list;
365 si = &k11->provider->slotinfo[k11->slotidx];
366
367 if ((si->token.flags & CKF_LOGIN_REQUIRED) && !si->logged_in) {
368 if (pkcs11_login(k11, CKU_USER) < 0) {
369 error("login failed");
370 return (-1);
371 }
372 did_login = 1;
373 }
374
375 memset(&key_filter, 0, sizeof(key_filter));
376 private_key_class = CKO_PRIVATE_KEY;
377 key_filter[0].type = CKA_CLASS;
378 key_filter[0].pValue = &private_key_class;
379 key_filter[0].ulValueLen = sizeof(private_key_class);
380
381 key_filter[1].type = CKA_ID;
382 key_filter[1].pValue = k11->keyid;
383 key_filter[1].ulValueLen = k11->keyid_len;
384
385 true_val = CK_TRUE;
386 key_filter[2].type = CKA_SIGN;
387 key_filter[2].pValue = &true_val;
388 key_filter[2].ulValueLen = sizeof(true_val);
389
390 /* try to find object w/CKA_SIGN first, retry w/o */
391 if (pkcs11_find(k11->provider, k11->slotidx, key_filter, 3, &obj) < 0 &&
392 pkcs11_find(k11->provider, k11->slotidx, key_filter, 2, &obj) < 0) {
393 error("cannot find private key");
394 return (-1);
395 }
396
397 memset(&mech, 0, sizeof(mech));
398 mech.mechanism = mech_type;
399 mech.pParameter = NULL_PTR;
400 mech.ulParameterLen = 0;
401
402 if ((rv = f->C_SignInit(si->session, &mech, obj)) != CKR_OK) {
403 error("C_SignInit failed: %lu", rv);
404 return (-1);
405 }
406
407 pkcs11_check_obj_bool_attrib(k11, obj, CKA_ALWAYS_AUTHENTICATE,
408 &always_auth); /* ignore errors here */
409 if (always_auth && !did_login) {
410 debug_f("always-auth key");
411 if (pkcs11_login(k11, CKU_CONTEXT_SPECIFIC) < 0) {
412 error("login failed for always-auth key");
413 return (-1);
414 }
415 }
416
417 return (0);
418 }
419
420 /* openssl callback doing the actual signing operation */
421 static int
pkcs11_rsa_private_encrypt(int flen,const u_char * from,u_char * to,RSA * rsa,int padding)422 pkcs11_rsa_private_encrypt(int flen, const u_char *from, u_char *to, RSA *rsa,
423 int padding)
424 {
425 struct pkcs11_key *k11;
426 struct pkcs11_slotinfo *si;
427 CK_FUNCTION_LIST *f;
428 CK_ULONG tlen = 0;
429 CK_RV rv;
430 int rval = -1;
431
432 if ((k11 = RSA_get_ex_data(rsa, rsa_idx)) == NULL) {
433 error("RSA_get_ex_data failed");
434 return (-1);
435 }
436
437 if (pkcs11_get_key(k11, CKM_RSA_PKCS) == -1) {
438 error("pkcs11_get_key failed");
439 return (-1);
440 }
441
442 f = k11->provider->function_list;
443 si = &k11->provider->slotinfo[k11->slotidx];
444 tlen = RSA_size(rsa);
445
446 /* XXX handle CKR_BUFFER_TOO_SMALL */
447 rv = f->C_Sign(si->session, (CK_BYTE *)from, flen, to, &tlen);
448 if (rv == CKR_OK)
449 rval = tlen;
450 else
451 error("C_Sign failed: %lu", rv);
452
453 return (rval);
454 }
455
456 static int
pkcs11_rsa_private_decrypt(int flen,const u_char * from,u_char * to,RSA * rsa,int padding)457 pkcs11_rsa_private_decrypt(int flen, const u_char *from, u_char *to, RSA *rsa,
458 int padding)
459 {
460 return (-1);
461 }
462
463 static int
pkcs11_rsa_start_wrapper(void)464 pkcs11_rsa_start_wrapper(void)
465 {
466 if (rsa_method != NULL)
467 return (0);
468 rsa_method = RSA_meth_dup(RSA_get_default_method());
469 if (rsa_method == NULL)
470 return (-1);
471 rsa_idx = RSA_get_ex_new_index(0, "ssh-pkcs11-rsa",
472 NULL, NULL, pkcs11_k11_free);
473 if (rsa_idx == -1)
474 return (-1);
475 if (!RSA_meth_set1_name(rsa_method, "pkcs11") ||
476 !RSA_meth_set_priv_enc(rsa_method, pkcs11_rsa_private_encrypt) ||
477 !RSA_meth_set_priv_dec(rsa_method, pkcs11_rsa_private_decrypt)) {
478 error_f("setup pkcs11 method failed");
479 return (-1);
480 }
481 return (0);
482 }
483
484 /* redirect private key operations for rsa key to pkcs11 token */
485 static int
pkcs11_rsa_wrap(struct pkcs11_provider * provider,CK_ULONG slotidx,CK_ATTRIBUTE * keyid_attrib,RSA * rsa)486 pkcs11_rsa_wrap(struct pkcs11_provider *provider, CK_ULONG slotidx,
487 CK_ATTRIBUTE *keyid_attrib, RSA *rsa)
488 {
489 struct pkcs11_key *k11;
490
491 if (pkcs11_rsa_start_wrapper() == -1)
492 return (-1);
493
494 k11 = xcalloc(1, sizeof(*k11));
495 k11->provider = provider;
496 provider->refcount++; /* provider referenced by RSA key */
497 k11->slotidx = slotidx;
498 /* identify key object on smartcard */
499 k11->keyid_len = keyid_attrib->ulValueLen;
500 if (k11->keyid_len > 0) {
501 k11->keyid = xmalloc(k11->keyid_len);
502 memcpy(k11->keyid, keyid_attrib->pValue, k11->keyid_len);
503 }
504
505 RSA_set_method(rsa, rsa_method);
506 RSA_set_ex_data(rsa, rsa_idx, k11);
507 return (0);
508 }
509
510 #ifdef HAVE_EC_KEY_METHOD_NEW
511 /* openssl callback doing the actual signing operation */
512 static ECDSA_SIG *
ecdsa_do_sign(const unsigned char * dgst,int dgst_len,const BIGNUM * inv,const BIGNUM * rp,EC_KEY * ec)513 ecdsa_do_sign(const unsigned char *dgst, int dgst_len, const BIGNUM *inv,
514 const BIGNUM *rp, EC_KEY *ec)
515 {
516 struct pkcs11_key *k11;
517 struct pkcs11_slotinfo *si;
518 CK_FUNCTION_LIST *f;
519 CK_ULONG siglen = 0, bnlen;
520 CK_RV rv;
521 ECDSA_SIG *ret = NULL;
522 u_char *sig;
523 BIGNUM *r = NULL, *s = NULL;
524
525 if ((k11 = EC_KEY_get_ex_data(ec, ec_key_idx)) == NULL) {
526 ossl_error("EC_KEY_get_key_method_data failed for ec");
527 return (NULL);
528 }
529
530 if (pkcs11_get_key(k11, CKM_ECDSA) == -1) {
531 error("pkcs11_get_key failed");
532 return (NULL);
533 }
534
535 f = k11->provider->function_list;
536 si = &k11->provider->slotinfo[k11->slotidx];
537
538 siglen = ECDSA_size(ec);
539 sig = xmalloc(siglen);
540
541 /* XXX handle CKR_BUFFER_TOO_SMALL */
542 rv = f->C_Sign(si->session, (CK_BYTE *)dgst, dgst_len, sig, &siglen);
543 if (rv != CKR_OK) {
544 error("C_Sign failed: %lu", rv);
545 goto done;
546 }
547 if (siglen < 64 || siglen > 132 || siglen % 2) {
548 ossl_error("d2i_ECDSA_SIG failed");
549 goto done;
550 }
551 bnlen = siglen/2;
552 if ((ret = ECDSA_SIG_new()) == NULL) {
553 error("ECDSA_SIG_new failed");
554 goto done;
555 }
556 if ((r = BN_bin2bn(sig, bnlen, NULL)) == NULL ||
557 (s = BN_bin2bn(sig+bnlen, bnlen, NULL)) == NULL) {
558 ossl_error("d2i_ECDSA_SIG failed");
559 ECDSA_SIG_free(ret);
560 ret = NULL;
561 goto done;
562 }
563 if (!ECDSA_SIG_set0(ret, r, s)) {
564 error_f("ECDSA_SIG_set0 failed");
565 ECDSA_SIG_free(ret);
566 ret = NULL;
567 goto done;
568 }
569 r = s = NULL; /* now owned by ret */
570 /* success */
571 done:
572 BN_free(r);
573 BN_free(s);
574 free(sig);
575
576 return (ret);
577 }
578
579 static int
pkcs11_ecdsa_start_wrapper(void)580 pkcs11_ecdsa_start_wrapper(void)
581 {
582 int (*orig_sign)(int, const unsigned char *, int, unsigned char *,
583 unsigned int *, const BIGNUM *, const BIGNUM *, EC_KEY *) = NULL;
584
585 if (ec_key_method != NULL)
586 return (0);
587 ec_key_idx = EC_KEY_get_ex_new_index(0, "ssh-pkcs11-ecdsa",
588 NULL, NULL, pkcs11_k11_free);
589 if (ec_key_idx == -1)
590 return (-1);
591 ec_key_method = EC_KEY_METHOD_new(EC_KEY_OpenSSL());
592 if (ec_key_method == NULL)
593 return (-1);
594 EC_KEY_METHOD_get_sign(ec_key_method, &orig_sign, NULL, NULL);
595 EC_KEY_METHOD_set_sign(ec_key_method, orig_sign, NULL, ecdsa_do_sign);
596 return (0);
597 }
598
599 static int
pkcs11_ecdsa_wrap(struct pkcs11_provider * provider,CK_ULONG slotidx,CK_ATTRIBUTE * keyid_attrib,EC_KEY * ec)600 pkcs11_ecdsa_wrap(struct pkcs11_provider *provider, CK_ULONG slotidx,
601 CK_ATTRIBUTE *keyid_attrib, EC_KEY *ec)
602 {
603 struct pkcs11_key *k11;
604
605 if (pkcs11_ecdsa_start_wrapper() == -1)
606 return (-1);
607
608 k11 = xcalloc(1, sizeof(*k11));
609 k11->provider = provider;
610 provider->refcount++; /* provider referenced by ECDSA key */
611 k11->slotidx = slotidx;
612 /* identify key object on smartcard */
613 k11->keyid_len = keyid_attrib->ulValueLen;
614 k11->keyid = xmalloc(k11->keyid_len);
615 memcpy(k11->keyid, keyid_attrib->pValue, k11->keyid_len);
616
617 EC_KEY_set_method(ec, ec_key_method);
618 EC_KEY_set_ex_data(ec, ec_key_idx, k11);
619
620 return (0);
621 }
622 #endif /* HAVE_EC_KEY_METHOD_NEW */
623
624 /* remove trailing spaces */
625 static void
rmspace(u_char * buf,size_t len)626 rmspace(u_char *buf, size_t len)
627 {
628 size_t i;
629
630 if (!len)
631 return;
632 for (i = len - 1; i > 0; i--)
633 if (i == len - 1 || buf[i] == ' ')
634 buf[i] = '\0';
635 else
636 break;
637 }
638
639 /*
640 * open a pkcs11 session and login if required.
641 * if pin == NULL we delay login until key use
642 */
643 static int
pkcs11_open_session(struct pkcs11_provider * p,CK_ULONG slotidx,char * pin,CK_ULONG user)644 pkcs11_open_session(struct pkcs11_provider *p, CK_ULONG slotidx, char *pin,
645 CK_ULONG user)
646 {
647 struct pkcs11_slotinfo *si;
648 CK_FUNCTION_LIST *f;
649 CK_RV rv;
650 CK_SESSION_HANDLE session;
651 int login_required, ret;
652
653 f = p->function_list;
654 si = &p->slotinfo[slotidx];
655
656 login_required = si->token.flags & CKF_LOGIN_REQUIRED;
657
658 /* fail early before opening session */
659 if (login_required && !pkcs11_interactive &&
660 (pin == NULL || strlen(pin) == 0)) {
661 error("pin required");
662 return (-SSH_PKCS11_ERR_PIN_REQUIRED);
663 }
664 if ((rv = f->C_OpenSession(p->slotlist[slotidx], CKF_RW_SESSION|
665 CKF_SERIAL_SESSION, NULL, NULL, &session)) != CKR_OK) {
666 error("C_OpenSession failed: %lu", rv);
667 return (-1);
668 }
669 if (login_required && pin != NULL && strlen(pin) != 0) {
670 rv = f->C_Login(session, user, (u_char *)pin, strlen(pin));
671 if (rv != CKR_OK && rv != CKR_USER_ALREADY_LOGGED_IN) {
672 error("C_Login failed: %lu", rv);
673 ret = (rv == CKR_PIN_LOCKED) ?
674 -SSH_PKCS11_ERR_PIN_LOCKED :
675 -SSH_PKCS11_ERR_LOGIN_FAIL;
676 if ((rv = f->C_CloseSession(session)) != CKR_OK)
677 error("C_CloseSession failed: %lu", rv);
678 return (ret);
679 }
680 si->logged_in = 1;
681 }
682 si->session = session;
683 return (0);
684 }
685
686 static int
pkcs11_key_included(struct sshkey *** keysp,int * nkeys,struct sshkey * key)687 pkcs11_key_included(struct sshkey ***keysp, int *nkeys, struct sshkey *key)
688 {
689 int i;
690
691 for (i = 0; i < *nkeys; i++)
692 if (sshkey_equal(key, (*keysp)[i]))
693 return (1);
694 return (0);
695 }
696
697 #ifdef HAVE_EC_KEY_METHOD_NEW
698 static struct sshkey *
pkcs11_fetch_ecdsa_pubkey(struct pkcs11_provider * p,CK_ULONG slotidx,CK_OBJECT_HANDLE * obj)699 pkcs11_fetch_ecdsa_pubkey(struct pkcs11_provider *p, CK_ULONG slotidx,
700 CK_OBJECT_HANDLE *obj)
701 {
702 CK_ATTRIBUTE key_attr[3];
703 CK_SESSION_HANDLE session;
704 CK_FUNCTION_LIST *f = NULL;
705 CK_RV rv;
706 ASN1_OCTET_STRING *octet = NULL;
707 EC_KEY *ec = NULL;
708 EC_GROUP *group = NULL;
709 struct sshkey *key = NULL;
710 const unsigned char *attrp = NULL;
711 int i;
712 int nid;
713
714 memset(&key_attr, 0, sizeof(key_attr));
715 key_attr[0].type = CKA_ID;
716 key_attr[1].type = CKA_EC_POINT;
717 key_attr[2].type = CKA_EC_PARAMS;
718
719 session = p->slotinfo[slotidx].session;
720 f = p->function_list;
721
722 /* figure out size of the attributes */
723 rv = f->C_GetAttributeValue(session, *obj, key_attr, 3);
724 if (rv != CKR_OK) {
725 error("C_GetAttributeValue failed: %lu", rv);
726 return (NULL);
727 }
728
729 /*
730 * Allow CKA_ID (always first attribute) to be empty, but
731 * ensure that none of the others are zero length.
732 * XXX assumes CKA_ID is always first.
733 */
734 if (key_attr[1].ulValueLen == 0 ||
735 key_attr[2].ulValueLen == 0) {
736 error("invalid attribute length");
737 return (NULL);
738 }
739
740 /* allocate buffers for attributes */
741 for (i = 0; i < 3; i++)
742 if (key_attr[i].ulValueLen > 0)
743 key_attr[i].pValue = xcalloc(1, key_attr[i].ulValueLen);
744
745 /* retrieve ID, public point and curve parameters of EC key */
746 rv = f->C_GetAttributeValue(session, *obj, key_attr, 3);
747 if (rv != CKR_OK) {
748 error("C_GetAttributeValue failed: %lu", rv);
749 goto fail;
750 }
751
752 ec = EC_KEY_new();
753 if (ec == NULL) {
754 error("EC_KEY_new failed");
755 goto fail;
756 }
757
758 attrp = key_attr[2].pValue;
759 group = d2i_ECPKParameters(NULL, &attrp, key_attr[2].ulValueLen);
760 if (group == NULL) {
761 ossl_error("d2i_ECPKParameters failed");
762 goto fail;
763 }
764
765 if (EC_KEY_set_group(ec, group) == 0) {
766 ossl_error("EC_KEY_set_group failed");
767 goto fail;
768 }
769
770 if (key_attr[1].ulValueLen <= 2) {
771 error("CKA_EC_POINT too small");
772 goto fail;
773 }
774
775 attrp = key_attr[1].pValue;
776 octet = d2i_ASN1_OCTET_STRING(NULL, &attrp, key_attr[1].ulValueLen);
777 if (octet == NULL) {
778 ossl_error("d2i_ASN1_OCTET_STRING failed");
779 goto fail;
780 }
781 attrp = octet->data;
782 if (o2i_ECPublicKey(&ec, &attrp, octet->length) == NULL) {
783 ossl_error("o2i_ECPublicKey failed");
784 goto fail;
785 }
786
787 nid = sshkey_ecdsa_key_to_nid(ec);
788 if (nid < 0) {
789 error("couldn't get curve nid");
790 goto fail;
791 }
792
793 if (pkcs11_ecdsa_wrap(p, slotidx, &key_attr[0], ec))
794 goto fail;
795
796 key = sshkey_new(KEY_UNSPEC);
797 if (key == NULL) {
798 error("sshkey_new failed");
799 goto fail;
800 }
801
802 key->ecdsa = ec;
803 key->ecdsa_nid = nid;
804 key->type = KEY_ECDSA;
805 key->flags |= SSHKEY_FLAG_EXT;
806 ec = NULL; /* now owned by key */
807
808 fail:
809 for (i = 0; i < 3; i++)
810 free(key_attr[i].pValue);
811 if (ec)
812 EC_KEY_free(ec);
813 if (group)
814 EC_GROUP_free(group);
815 if (octet)
816 ASN1_OCTET_STRING_free(octet);
817
818 return (key);
819 }
820 #endif /* HAVE_EC_KEY_METHOD_NEW */
821
822 static struct sshkey *
pkcs11_fetch_rsa_pubkey(struct pkcs11_provider * p,CK_ULONG slotidx,CK_OBJECT_HANDLE * obj)823 pkcs11_fetch_rsa_pubkey(struct pkcs11_provider *p, CK_ULONG slotidx,
824 CK_OBJECT_HANDLE *obj)
825 {
826 CK_ATTRIBUTE key_attr[3];
827 CK_SESSION_HANDLE session;
828 CK_FUNCTION_LIST *f = NULL;
829 CK_RV rv;
830 RSA *rsa = NULL;
831 BIGNUM *rsa_n, *rsa_e;
832 struct sshkey *key = NULL;
833 int i;
834
835 memset(&key_attr, 0, sizeof(key_attr));
836 key_attr[0].type = CKA_ID;
837 key_attr[1].type = CKA_MODULUS;
838 key_attr[2].type = CKA_PUBLIC_EXPONENT;
839
840 session = p->slotinfo[slotidx].session;
841 f = p->function_list;
842
843 /* figure out size of the attributes */
844 rv = f->C_GetAttributeValue(session, *obj, key_attr, 3);
845 if (rv != CKR_OK) {
846 error("C_GetAttributeValue failed: %lu", rv);
847 return (NULL);
848 }
849
850 /*
851 * Allow CKA_ID (always first attribute) to be empty, but
852 * ensure that none of the others are zero length.
853 * XXX assumes CKA_ID is always first.
854 */
855 if (key_attr[1].ulValueLen == 0 ||
856 key_attr[2].ulValueLen == 0) {
857 error("invalid attribute length");
858 return (NULL);
859 }
860
861 /* allocate buffers for attributes */
862 for (i = 0; i < 3; i++)
863 if (key_attr[i].ulValueLen > 0)
864 key_attr[i].pValue = xcalloc(1, key_attr[i].ulValueLen);
865
866 /* retrieve ID, modulus and public exponent of RSA key */
867 rv = f->C_GetAttributeValue(session, *obj, key_attr, 3);
868 if (rv != CKR_OK) {
869 error("C_GetAttributeValue failed: %lu", rv);
870 goto fail;
871 }
872
873 rsa = RSA_new();
874 if (rsa == NULL) {
875 error("RSA_new failed");
876 goto fail;
877 }
878
879 rsa_n = BN_bin2bn(key_attr[1].pValue, key_attr[1].ulValueLen, NULL);
880 rsa_e = BN_bin2bn(key_attr[2].pValue, key_attr[2].ulValueLen, NULL);
881 if (rsa_n == NULL || rsa_e == NULL) {
882 error("BN_bin2bn failed");
883 goto fail;
884 }
885 if (!RSA_set0_key(rsa, rsa_n, rsa_e, NULL))
886 fatal_f("set key");
887 rsa_n = rsa_e = NULL; /* transferred */
888
889 if (pkcs11_rsa_wrap(p, slotidx, &key_attr[0], rsa))
890 goto fail;
891
892 key = sshkey_new(KEY_UNSPEC);
893 if (key == NULL) {
894 error("sshkey_new failed");
895 goto fail;
896 }
897
898 key->rsa = rsa;
899 key->type = KEY_RSA;
900 key->flags |= SSHKEY_FLAG_EXT;
901 rsa = NULL; /* now owned by key */
902
903 fail:
904 for (i = 0; i < 3; i++)
905 free(key_attr[i].pValue);
906 RSA_free(rsa);
907
908 return (key);
909 }
910
911 static int
pkcs11_fetch_x509_pubkey(struct pkcs11_provider * p,CK_ULONG slotidx,CK_OBJECT_HANDLE * obj,struct sshkey ** keyp,char ** labelp)912 pkcs11_fetch_x509_pubkey(struct pkcs11_provider *p, CK_ULONG slotidx,
913 CK_OBJECT_HANDLE *obj, struct sshkey **keyp, char **labelp)
914 {
915 CK_ATTRIBUTE cert_attr[3];
916 CK_SESSION_HANDLE session;
917 CK_FUNCTION_LIST *f = NULL;
918 CK_RV rv;
919 X509 *x509 = NULL;
920 X509_NAME *x509_name = NULL;
921 EVP_PKEY *evp;
922 RSA *rsa = NULL;
923 #ifdef OPENSSL_HAS_ECC
924 EC_KEY *ec = NULL;
925 #endif
926 struct sshkey *key = NULL;
927 int i;
928 #ifdef HAVE_EC_KEY_METHOD_NEW
929 int nid;
930 #endif
931 const u_char *cp;
932 char *subject = NULL;
933
934 *keyp = NULL;
935 *labelp = NULL;
936
937 memset(&cert_attr, 0, sizeof(cert_attr));
938 cert_attr[0].type = CKA_ID;
939 cert_attr[1].type = CKA_SUBJECT;
940 cert_attr[2].type = CKA_VALUE;
941
942 session = p->slotinfo[slotidx].session;
943 f = p->function_list;
944
945 /* figure out size of the attributes */
946 rv = f->C_GetAttributeValue(session, *obj, cert_attr, 3);
947 if (rv != CKR_OK) {
948 error("C_GetAttributeValue failed: %lu", rv);
949 return -1;
950 }
951
952 /*
953 * Allow CKA_ID (always first attribute) to be empty, but
954 * ensure that none of the others are zero length.
955 * XXX assumes CKA_ID is always first.
956 */
957 if (cert_attr[1].ulValueLen == 0 ||
958 cert_attr[2].ulValueLen == 0) {
959 error("invalid attribute length");
960 return -1;
961 }
962
963 /* allocate buffers for attributes */
964 for (i = 0; i < 3; i++)
965 if (cert_attr[i].ulValueLen > 0)
966 cert_attr[i].pValue = xcalloc(1, cert_attr[i].ulValueLen);
967
968 /* retrieve ID, subject and value of certificate */
969 rv = f->C_GetAttributeValue(session, *obj, cert_attr, 3);
970 if (rv != CKR_OK) {
971 error("C_GetAttributeValue failed: %lu", rv);
972 goto out;
973 }
974
975 /* Decode DER-encoded cert subject */
976 cp = cert_attr[1].pValue;
977 if ((x509_name = d2i_X509_NAME(NULL, &cp,
978 cert_attr[1].ulValueLen)) == NULL ||
979 (subject = X509_NAME_oneline(x509_name, NULL, 0)) == NULL)
980 subject = xstrdup("invalid subject");
981 X509_NAME_free(x509_name);
982
983 cp = cert_attr[2].pValue;
984 if ((x509 = d2i_X509(NULL, &cp, cert_attr[2].ulValueLen)) == NULL) {
985 error("d2i_x509 failed");
986 goto out;
987 }
988
989 if ((evp = X509_get_pubkey(x509)) == NULL) {
990 error("X509_get_pubkey failed");
991 goto out;
992 }
993
994 if (EVP_PKEY_base_id(evp) == EVP_PKEY_RSA) {
995 if (EVP_PKEY_get0_RSA(evp) == NULL) {
996 error("invalid x509; no rsa key");
997 goto out;
998 }
999 if ((rsa = RSAPublicKey_dup(EVP_PKEY_get0_RSA(evp))) == NULL) {
1000 error("RSAPublicKey_dup failed");
1001 goto out;
1002 }
1003
1004 if (pkcs11_rsa_wrap(p, slotidx, &cert_attr[0], rsa))
1005 goto out;
1006
1007 key = sshkey_new(KEY_UNSPEC);
1008 if (key == NULL) {
1009 error("sshkey_new failed");
1010 goto out;
1011 }
1012
1013 key->rsa = rsa;
1014 key->type = KEY_RSA;
1015 key->flags |= SSHKEY_FLAG_EXT;
1016 rsa = NULL; /* now owned by key */
1017 #ifdef HAVE_EC_KEY_METHOD_NEW
1018 } else if (EVP_PKEY_base_id(evp) == EVP_PKEY_EC) {
1019 if (EVP_PKEY_get0_EC_KEY(evp) == NULL) {
1020 error("invalid x509; no ec key");
1021 goto out;
1022 }
1023 if ((ec = EC_KEY_dup(EVP_PKEY_get0_EC_KEY(evp))) == NULL) {
1024 error("EC_KEY_dup failed");
1025 goto out;
1026 }
1027
1028 nid = sshkey_ecdsa_key_to_nid(ec);
1029 if (nid < 0) {
1030 error("couldn't get curve nid");
1031 goto out;
1032 }
1033
1034 if (pkcs11_ecdsa_wrap(p, slotidx, &cert_attr[0], ec))
1035 goto out;
1036
1037 key = sshkey_new(KEY_UNSPEC);
1038 if (key == NULL) {
1039 error("sshkey_new failed");
1040 goto out;
1041 }
1042
1043 key->ecdsa = ec;
1044 key->ecdsa_nid = nid;
1045 key->type = KEY_ECDSA;
1046 key->flags |= SSHKEY_FLAG_EXT;
1047 ec = NULL; /* now owned by key */
1048 #endif /* HAVE_EC_KEY_METHOD_NEW */
1049 } else {
1050 error("unknown certificate key type");
1051 goto out;
1052 }
1053 out:
1054 for (i = 0; i < 3; i++)
1055 free(cert_attr[i].pValue);
1056 X509_free(x509);
1057 RSA_free(rsa);
1058 #ifdef OPENSSL_HAS_ECC
1059 EC_KEY_free(ec);
1060 #endif
1061 if (key == NULL) {
1062 free(subject);
1063 return -1;
1064 }
1065 /* success */
1066 *keyp = key;
1067 *labelp = subject;
1068 return 0;
1069 }
1070
1071 #if 0
1072 static int
1073 have_rsa_key(const RSA *rsa)
1074 {
1075 const BIGNUM *rsa_n, *rsa_e;
1076
1077 RSA_get0_key(rsa, &rsa_n, &rsa_e, NULL);
1078 return rsa_n != NULL && rsa_e != NULL;
1079 }
1080 #endif
1081
1082 static void
note_key(struct pkcs11_provider * p,CK_ULONG slotidx,const char * context,struct sshkey * key)1083 note_key(struct pkcs11_provider *p, CK_ULONG slotidx, const char *context,
1084 struct sshkey *key)
1085 {
1086 char *fp;
1087
1088 if ((fp = sshkey_fingerprint(key, SSH_FP_HASH_DEFAULT,
1089 SSH_FP_DEFAULT)) == NULL) {
1090 error_f("sshkey_fingerprint failed");
1091 return;
1092 }
1093 debug2("%s: provider %s slot %lu: %s %s", context, p->name,
1094 (u_long)slotidx, sshkey_type(key), fp);
1095 free(fp);
1096 }
1097
1098 /*
1099 * lookup certificates for token in slot identified by slotidx,
1100 * add 'wrapped' public keys to the 'keysp' array and increment nkeys.
1101 * keysp points to an (possibly empty) array with *nkeys keys.
1102 */
1103 static int
pkcs11_fetch_certs(struct pkcs11_provider * p,CK_ULONG slotidx,struct sshkey *** keysp,char *** labelsp,int * nkeys)1104 pkcs11_fetch_certs(struct pkcs11_provider *p, CK_ULONG slotidx,
1105 struct sshkey ***keysp, char ***labelsp, int *nkeys)
1106 {
1107 struct sshkey *key = NULL;
1108 CK_OBJECT_CLASS key_class;
1109 CK_ATTRIBUTE key_attr[1];
1110 CK_SESSION_HANDLE session;
1111 CK_FUNCTION_LIST *f = NULL;
1112 CK_RV rv;
1113 CK_OBJECT_HANDLE obj;
1114 CK_ULONG n = 0;
1115 int ret = -1;
1116 char *label;
1117
1118 memset(&key_attr, 0, sizeof(key_attr));
1119 memset(&obj, 0, sizeof(obj));
1120
1121 key_class = CKO_CERTIFICATE;
1122 key_attr[0].type = CKA_CLASS;
1123 key_attr[0].pValue = &key_class;
1124 key_attr[0].ulValueLen = sizeof(key_class);
1125
1126 session = p->slotinfo[slotidx].session;
1127 f = p->function_list;
1128
1129 rv = f->C_FindObjectsInit(session, key_attr, 1);
1130 if (rv != CKR_OK) {
1131 error("C_FindObjectsInit failed: %lu", rv);
1132 goto fail;
1133 }
1134
1135 while (1) {
1136 CK_CERTIFICATE_TYPE ck_cert_type;
1137
1138 rv = f->C_FindObjects(session, &obj, 1, &n);
1139 if (rv != CKR_OK) {
1140 error("C_FindObjects failed: %lu", rv);
1141 goto fail;
1142 }
1143 if (n == 0)
1144 break;
1145
1146 memset(&ck_cert_type, 0, sizeof(ck_cert_type));
1147 memset(&key_attr, 0, sizeof(key_attr));
1148 key_attr[0].type = CKA_CERTIFICATE_TYPE;
1149 key_attr[0].pValue = &ck_cert_type;
1150 key_attr[0].ulValueLen = sizeof(ck_cert_type);
1151
1152 rv = f->C_GetAttributeValue(session, obj, key_attr, 1);
1153 if (rv != CKR_OK) {
1154 error("C_GetAttributeValue failed: %lu", rv);
1155 goto fail;
1156 }
1157
1158 key = NULL;
1159 label = NULL;
1160 switch (ck_cert_type) {
1161 case CKC_X_509:
1162 if (pkcs11_fetch_x509_pubkey(p, slotidx, &obj,
1163 &key, &label) != 0) {
1164 error("failed to fetch key");
1165 continue;
1166 }
1167 break;
1168 default:
1169 error("skipping unsupported certificate type %lu",
1170 ck_cert_type);
1171 continue;
1172 }
1173 note_key(p, slotidx, __func__, key);
1174 if (pkcs11_key_included(keysp, nkeys, key)) {
1175 debug2_f("key already included");;
1176 sshkey_free(key);
1177 } else {
1178 /* expand key array and add key */
1179 *keysp = xrecallocarray(*keysp, *nkeys,
1180 *nkeys + 1, sizeof(struct sshkey *));
1181 (*keysp)[*nkeys] = key;
1182 if (labelsp != NULL) {
1183 *labelsp = xrecallocarray(*labelsp, *nkeys,
1184 *nkeys + 1, sizeof(char *));
1185 (*labelsp)[*nkeys] = xstrdup((char *)label);
1186 }
1187 *nkeys = *nkeys + 1;
1188 debug("have %d keys", *nkeys);
1189 }
1190 }
1191
1192 ret = 0;
1193 fail:
1194 rv = f->C_FindObjectsFinal(session);
1195 if (rv != CKR_OK) {
1196 error("C_FindObjectsFinal failed: %lu", rv);
1197 ret = -1;
1198 }
1199
1200 return (ret);
1201 }
1202
1203 /*
1204 * lookup public keys for token in slot identified by slotidx,
1205 * add 'wrapped' public keys to the 'keysp' array and increment nkeys.
1206 * keysp points to an (possibly empty) array with *nkeys keys.
1207 */
1208 static int
pkcs11_fetch_keys(struct pkcs11_provider * p,CK_ULONG slotidx,struct sshkey *** keysp,char *** labelsp,int * nkeys)1209 pkcs11_fetch_keys(struct pkcs11_provider *p, CK_ULONG slotidx,
1210 struct sshkey ***keysp, char ***labelsp, int *nkeys)
1211 {
1212 struct sshkey *key = NULL;
1213 CK_OBJECT_CLASS key_class;
1214 CK_ATTRIBUTE key_attr[2];
1215 CK_SESSION_HANDLE session;
1216 CK_FUNCTION_LIST *f = NULL;
1217 CK_RV rv;
1218 CK_OBJECT_HANDLE obj;
1219 CK_ULONG n = 0;
1220 int ret = -1;
1221
1222 memset(&key_attr, 0, sizeof(key_attr));
1223 memset(&obj, 0, sizeof(obj));
1224
1225 key_class = CKO_PUBLIC_KEY;
1226 key_attr[0].type = CKA_CLASS;
1227 key_attr[0].pValue = &key_class;
1228 key_attr[0].ulValueLen = sizeof(key_class);
1229
1230 session = p->slotinfo[slotidx].session;
1231 f = p->function_list;
1232
1233 rv = f->C_FindObjectsInit(session, key_attr, 1);
1234 if (rv != CKR_OK) {
1235 error("C_FindObjectsInit failed: %lu", rv);
1236 goto fail;
1237 }
1238
1239 while (1) {
1240 CK_KEY_TYPE ck_key_type;
1241 CK_UTF8CHAR label[256];
1242
1243 rv = f->C_FindObjects(session, &obj, 1, &n);
1244 if (rv != CKR_OK) {
1245 error("C_FindObjects failed: %lu", rv);
1246 goto fail;
1247 }
1248 if (n == 0)
1249 break;
1250
1251 memset(&ck_key_type, 0, sizeof(ck_key_type));
1252 memset(&key_attr, 0, sizeof(key_attr));
1253 key_attr[0].type = CKA_KEY_TYPE;
1254 key_attr[0].pValue = &ck_key_type;
1255 key_attr[0].ulValueLen = sizeof(ck_key_type);
1256 key_attr[1].type = CKA_LABEL;
1257 key_attr[1].pValue = &label;
1258 key_attr[1].ulValueLen = sizeof(label) - 1;
1259
1260 rv = f->C_GetAttributeValue(session, obj, key_attr, 2);
1261 if (rv != CKR_OK) {
1262 error("C_GetAttributeValue failed: %lu", rv);
1263 goto fail;
1264 }
1265
1266 label[key_attr[1].ulValueLen] = '\0';
1267
1268 switch (ck_key_type) {
1269 case CKK_RSA:
1270 key = pkcs11_fetch_rsa_pubkey(p, slotidx, &obj);
1271 break;
1272 #ifdef HAVE_EC_KEY_METHOD_NEW
1273 case CKK_ECDSA:
1274 key = pkcs11_fetch_ecdsa_pubkey(p, slotidx, &obj);
1275 break;
1276 #endif /* HAVE_EC_KEY_METHOD_NEW */
1277 default:
1278 /* XXX print key type? */
1279 key = NULL;
1280 error("skipping unsupported key type");
1281 }
1282
1283 if (key == NULL) {
1284 error("failed to fetch key");
1285 continue;
1286 }
1287 note_key(p, slotidx, __func__, key);
1288 if (pkcs11_key_included(keysp, nkeys, key)) {
1289 debug2_f("key already included");;
1290 sshkey_free(key);
1291 } else {
1292 /* expand key array and add key */
1293 *keysp = xrecallocarray(*keysp, *nkeys,
1294 *nkeys + 1, sizeof(struct sshkey *));
1295 (*keysp)[*nkeys] = key;
1296 if (labelsp != NULL) {
1297 *labelsp = xrecallocarray(*labelsp, *nkeys,
1298 *nkeys + 1, sizeof(char *));
1299 (*labelsp)[*nkeys] = xstrdup((char *)label);
1300 }
1301 *nkeys = *nkeys + 1;
1302 debug("have %d keys", *nkeys);
1303 }
1304 }
1305
1306 ret = 0;
1307 fail:
1308 rv = f->C_FindObjectsFinal(session);
1309 if (rv != CKR_OK) {
1310 error("C_FindObjectsFinal failed: %lu", rv);
1311 ret = -1;
1312 }
1313
1314 return (ret);
1315 }
1316
1317 #ifdef WITH_PKCS11_KEYGEN
1318 #define FILL_ATTR(attr, idx, typ, val, len) \
1319 { (attr[idx]).type=(typ); (attr[idx]).pValue=(val); (attr[idx]).ulValueLen=len; idx++; }
1320
1321 static struct sshkey *
pkcs11_rsa_generate_private_key(struct pkcs11_provider * p,CK_ULONG slotidx,char * label,CK_ULONG bits,CK_BYTE keyid,u_int32_t * err)1322 pkcs11_rsa_generate_private_key(struct pkcs11_provider *p, CK_ULONG slotidx,
1323 char *label, CK_ULONG bits, CK_BYTE keyid, u_int32_t *err)
1324 {
1325 struct pkcs11_slotinfo *si;
1326 char *plabel = label ? label : "";
1327 int npub = 0, npriv = 0;
1328 CK_RV rv;
1329 CK_FUNCTION_LIST *f;
1330 CK_SESSION_HANDLE session;
1331 CK_BBOOL true_val = CK_TRUE, false_val = CK_FALSE;
1332 CK_OBJECT_HANDLE pubKey, privKey;
1333 CK_ATTRIBUTE tpub[16], tpriv[16];
1334 CK_MECHANISM mech = {
1335 CKM_RSA_PKCS_KEY_PAIR_GEN, NULL_PTR, 0
1336 };
1337 CK_BYTE pubExponent[] = {
1338 0x01, 0x00, 0x01 /* RSA_F4 in bytes */
1339 };
1340 pubkey_filter[0].pValue = &pubkey_class;
1341 cert_filter[0].pValue = &cert_class;
1342
1343 *err = 0;
1344
1345 FILL_ATTR(tpub, npub, CKA_TOKEN, &true_val, sizeof(true_val));
1346 FILL_ATTR(tpub, npub, CKA_LABEL, plabel, strlen(plabel));
1347 FILL_ATTR(tpub, npub, CKA_ENCRYPT, &false_val, sizeof(false_val));
1348 FILL_ATTR(tpub, npub, CKA_VERIFY, &true_val, sizeof(true_val));
1349 FILL_ATTR(tpub, npub, CKA_VERIFY_RECOVER, &false_val,
1350 sizeof(false_val));
1351 FILL_ATTR(tpub, npub, CKA_WRAP, &false_val, sizeof(false_val));
1352 FILL_ATTR(tpub, npub, CKA_DERIVE, &false_val, sizeof(false_val));
1353 FILL_ATTR(tpub, npub, CKA_MODULUS_BITS, &bits, sizeof(bits));
1354 FILL_ATTR(tpub, npub, CKA_PUBLIC_EXPONENT, pubExponent,
1355 sizeof(pubExponent));
1356 FILL_ATTR(tpub, npub, CKA_ID, &keyid, sizeof(keyid));
1357
1358 FILL_ATTR(tpriv, npriv, CKA_TOKEN, &true_val, sizeof(true_val));
1359 FILL_ATTR(tpriv, npriv, CKA_LABEL, plabel, strlen(plabel));
1360 FILL_ATTR(tpriv, npriv, CKA_PRIVATE, &true_val, sizeof(true_val));
1361 FILL_ATTR(tpriv, npriv, CKA_SENSITIVE, &true_val, sizeof(true_val));
1362 FILL_ATTR(tpriv, npriv, CKA_DECRYPT, &false_val, sizeof(false_val));
1363 FILL_ATTR(tpriv, npriv, CKA_SIGN, &true_val, sizeof(true_val));
1364 FILL_ATTR(tpriv, npriv, CKA_SIGN_RECOVER, &false_val,
1365 sizeof(false_val));
1366 FILL_ATTR(tpriv, npriv, CKA_UNWRAP, &false_val, sizeof(false_val));
1367 FILL_ATTR(tpriv, npriv, CKA_DERIVE, &false_val, sizeof(false_val));
1368 FILL_ATTR(tpriv, npriv, CKA_ID, &keyid, sizeof(keyid));
1369
1370 f = p->function_list;
1371 si = &p->slotinfo[slotidx];
1372 session = si->session;
1373
1374 if ((rv = f->C_GenerateKeyPair(session, &mech, tpub, npub, tpriv, npriv,
1375 &pubKey, &privKey)) != CKR_OK) {
1376 error_f("key generation failed: error 0x%lx", rv);
1377 *err = rv;
1378 return NULL;
1379 }
1380
1381 return pkcs11_fetch_rsa_pubkey(p, slotidx, &pubKey);
1382 }
1383
1384 static int
pkcs11_decode_hex(const char * hex,unsigned char ** dest,size_t * rlen)1385 pkcs11_decode_hex(const char *hex, unsigned char **dest, size_t *rlen)
1386 {
1387 size_t i, len;
1388 char ptr[3];
1389
1390 if (dest)
1391 *dest = NULL;
1392 if (rlen)
1393 *rlen = 0;
1394
1395 if ((len = strlen(hex)) % 2)
1396 return -1;
1397 len /= 2;
1398
1399 *dest = xmalloc(len);
1400
1401 ptr[2] = '\0';
1402 for (i = 0; i < len; i++) {
1403 ptr[0] = hex[2 * i];
1404 ptr[1] = hex[(2 * i) + 1];
1405 if (!isxdigit(ptr[0]) || !isxdigit(ptr[1]))
1406 return -1;
1407 (*dest)[i] = (unsigned char)strtoul(ptr, NULL, 16);
1408 }
1409
1410 if (rlen)
1411 *rlen = len;
1412
1413 return 0;
1414 }
1415
1416 static struct ec_curve_info {
1417 const char *name;
1418 const char *oid;
1419 const char *oid_encoded;
1420 size_t size;
1421 } ec_curve_infos[] = {
1422 {"prime256v1", "1.2.840.10045.3.1.7", "06082A8648CE3D030107", 256},
1423 {"secp384r1", "1.3.132.0.34", "06052B81040022", 384},
1424 {"secp521r1", "1.3.132.0.35", "06052B81040023", 521},
1425 {NULL, NULL, NULL, 0},
1426 };
1427
1428 static struct sshkey *
pkcs11_ecdsa_generate_private_key(struct pkcs11_provider * p,CK_ULONG slotidx,char * label,CK_ULONG bits,CK_BYTE keyid,u_int32_t * err)1429 pkcs11_ecdsa_generate_private_key(struct pkcs11_provider *p, CK_ULONG slotidx,
1430 char *label, CK_ULONG bits, CK_BYTE keyid, u_int32_t *err)
1431 {
1432 struct pkcs11_slotinfo *si;
1433 char *plabel = label ? label : "";
1434 int i;
1435 size_t ecparams_size;
1436 unsigned char *ecparams = NULL;
1437 int npub = 0, npriv = 0;
1438 CK_RV rv;
1439 CK_FUNCTION_LIST *f;
1440 CK_SESSION_HANDLE session;
1441 CK_BBOOL true_val = CK_TRUE, false_val = CK_FALSE;
1442 CK_OBJECT_HANDLE pubKey, privKey;
1443 CK_MECHANISM mech = {
1444 CKM_EC_KEY_PAIR_GEN, NULL_PTR, 0
1445 };
1446 CK_ATTRIBUTE tpub[16], tpriv[16];
1447
1448 *err = 0;
1449
1450 for (i = 0; ec_curve_infos[i].name; i++) {
1451 if (ec_curve_infos[i].size == bits)
1452 break;
1453 }
1454 if (!ec_curve_infos[i].name) {
1455 error_f("invalid key size %lu", bits);
1456 return NULL;
1457 }
1458 if (pkcs11_decode_hex(ec_curve_infos[i].oid_encoded, &ecparams,
1459 &ecparams_size) == -1) {
1460 error_f("invalid oid");
1461 return NULL;
1462 }
1463
1464 FILL_ATTR(tpub, npub, CKA_TOKEN, &true_val, sizeof(true_val));
1465 FILL_ATTR(tpub, npub, CKA_LABEL, plabel, strlen(plabel));
1466 FILL_ATTR(tpub, npub, CKA_ENCRYPT, &false_val, sizeof(false_val));
1467 FILL_ATTR(tpub, npub, CKA_VERIFY, &true_val, sizeof(true_val));
1468 FILL_ATTR(tpub, npub, CKA_VERIFY_RECOVER, &false_val,
1469 sizeof(false_val));
1470 FILL_ATTR(tpub, npub, CKA_WRAP, &false_val, sizeof(false_val));
1471 FILL_ATTR(tpub, npub, CKA_DERIVE, &false_val, sizeof(false_val));
1472 FILL_ATTR(tpub, npub, CKA_EC_PARAMS, ecparams, ecparams_size);
1473 FILL_ATTR(tpub, npub, CKA_ID, &keyid, sizeof(keyid));
1474
1475 FILL_ATTR(tpriv, npriv, CKA_TOKEN, &true_val, sizeof(true_val));
1476 FILL_ATTR(tpriv, npriv, CKA_LABEL, plabel, strlen(plabel));
1477 FILL_ATTR(tpriv, npriv, CKA_PRIVATE, &true_val, sizeof(true_val));
1478 FILL_ATTR(tpriv, npriv, CKA_SENSITIVE, &true_val, sizeof(true_val));
1479 FILL_ATTR(tpriv, npriv, CKA_DECRYPT, &false_val, sizeof(false_val));
1480 FILL_ATTR(tpriv, npriv, CKA_SIGN, &true_val, sizeof(true_val));
1481 FILL_ATTR(tpriv, npriv, CKA_SIGN_RECOVER, &false_val,
1482 sizeof(false_val));
1483 FILL_ATTR(tpriv, npriv, CKA_UNWRAP, &false_val, sizeof(false_val));
1484 FILL_ATTR(tpriv, npriv, CKA_DERIVE, &false_val, sizeof(false_val));
1485 FILL_ATTR(tpriv, npriv, CKA_ID, &keyid, sizeof(keyid));
1486
1487 f = p->function_list;
1488 si = &p->slotinfo[slotidx];
1489 session = si->session;
1490
1491 if ((rv = f->C_GenerateKeyPair(session, &mech, tpub, npub, tpriv, npriv,
1492 &pubKey, &privKey)) != CKR_OK) {
1493 error_f("key generation failed: error 0x%lx", rv);
1494 *err = rv;
1495 return NULL;
1496 }
1497
1498 return pkcs11_fetch_ecdsa_pubkey(p, slotidx, &pubKey);
1499 }
1500 #endif /* WITH_PKCS11_KEYGEN */
1501
1502 /*
1503 * register a new provider, fails if provider already exists. if
1504 * keyp is provided, fetch keys.
1505 */
1506 static int
pkcs11_register_provider(char * provider_id,char * pin,struct sshkey *** keyp,char *** labelsp,struct pkcs11_provider ** providerp,CK_ULONG user)1507 pkcs11_register_provider(char *provider_id, char *pin,
1508 struct sshkey ***keyp, char ***labelsp,
1509 struct pkcs11_provider **providerp, CK_ULONG user)
1510 {
1511 int nkeys, need_finalize = 0;
1512 int ret = -1;
1513 struct pkcs11_provider *p = NULL;
1514 void *handle = NULL;
1515 CK_RV (*getfunctionlist)(CK_FUNCTION_LIST **);
1516 CK_RV rv;
1517 CK_FUNCTION_LIST *f = NULL;
1518 CK_TOKEN_INFO *token;
1519 CK_ULONG i;
1520
1521 if (providerp == NULL)
1522 goto fail;
1523 *providerp = NULL;
1524
1525 if (keyp != NULL)
1526 *keyp = NULL;
1527 if (labelsp != NULL)
1528 *labelsp = NULL;
1529
1530 if (pkcs11_provider_lookup(provider_id) != NULL) {
1531 debug_f("provider already registered: %s", provider_id);
1532 goto fail;
1533 }
1534 /* open shared pkcs11-library */
1535 if ((handle = dlopen(provider_id, RTLD_NOW)) == NULL) {
1536 error("dlopen %s failed: %s", provider_id, dlerror());
1537 goto fail;
1538 }
1539 if ((getfunctionlist = dlsym(handle, "C_GetFunctionList")) == NULL) {
1540 error("dlsym(C_GetFunctionList) failed: %s", dlerror());
1541 goto fail;
1542 }
1543 p = xcalloc(1, sizeof(*p));
1544 p->name = xstrdup(provider_id);
1545 p->handle = handle;
1546 /* setup the pkcs11 callbacks */
1547 if ((rv = (*getfunctionlist)(&f)) != CKR_OK) {
1548 error("C_GetFunctionList for provider %s failed: %lu",
1549 provider_id, rv);
1550 goto fail;
1551 }
1552 p->function_list = f;
1553 if ((rv = f->C_Initialize(NULL)) != CKR_OK) {
1554 error("C_Initialize for provider %s failed: %lu",
1555 provider_id, rv);
1556 goto fail;
1557 }
1558 need_finalize = 1;
1559 if ((rv = f->C_GetInfo(&p->info)) != CKR_OK) {
1560 error("C_GetInfo for provider %s failed: %lu",
1561 provider_id, rv);
1562 goto fail;
1563 }
1564 rmspace(p->info.manufacturerID, sizeof(p->info.manufacturerID));
1565 rmspace(p->info.libraryDescription, sizeof(p->info.libraryDescription));
1566 debug("provider %s: manufacturerID <%s> cryptokiVersion %d.%d"
1567 " libraryDescription <%s> libraryVersion %d.%d",
1568 provider_id,
1569 p->info.manufacturerID,
1570 p->info.cryptokiVersion.major,
1571 p->info.cryptokiVersion.minor,
1572 p->info.libraryDescription,
1573 p->info.libraryVersion.major,
1574 p->info.libraryVersion.minor);
1575 if ((rv = f->C_GetSlotList(CK_TRUE, NULL, &p->nslots)) != CKR_OK) {
1576 error("C_GetSlotList failed: %lu", rv);
1577 goto fail;
1578 }
1579 if (p->nslots == 0) {
1580 debug_f("provider %s returned no slots", provider_id);
1581 ret = -SSH_PKCS11_ERR_NO_SLOTS;
1582 goto fail;
1583 }
1584 p->slotlist = xcalloc(p->nslots, sizeof(CK_SLOT_ID));
1585 if ((rv = f->C_GetSlotList(CK_TRUE, p->slotlist, &p->nslots))
1586 != CKR_OK) {
1587 error("C_GetSlotList for provider %s failed: %lu",
1588 provider_id, rv);
1589 goto fail;
1590 }
1591 p->slotinfo = xcalloc(p->nslots, sizeof(struct pkcs11_slotinfo));
1592 p->valid = 1;
1593 nkeys = 0;
1594 for (i = 0; i < p->nslots; i++) {
1595 token = &p->slotinfo[i].token;
1596 if ((rv = f->C_GetTokenInfo(p->slotlist[i], token))
1597 != CKR_OK) {
1598 error("C_GetTokenInfo for provider %s slot %lu "
1599 "failed: %lu", provider_id, (u_long)i, rv);
1600 continue;
1601 }
1602 if ((token->flags & CKF_TOKEN_INITIALIZED) == 0) {
1603 debug2_f("ignoring uninitialised token in "
1604 "provider %s slot %lu", provider_id, (u_long)i);
1605 continue;
1606 }
1607 rmspace(token->label, sizeof(token->label));
1608 rmspace(token->manufacturerID, sizeof(token->manufacturerID));
1609 rmspace(token->model, sizeof(token->model));
1610 rmspace(token->serialNumber, sizeof(token->serialNumber));
1611 debug("provider %s slot %lu: label <%s> manufacturerID <%s> "
1612 "model <%s> serial <%s> flags 0x%lx",
1613 provider_id, (unsigned long)i,
1614 token->label, token->manufacturerID, token->model,
1615 token->serialNumber, token->flags);
1616 /*
1617 * open session, login with pin and retrieve public
1618 * keys (if keyp is provided)
1619 */
1620 if ((ret = pkcs11_open_session(p, i, pin, user)) != 0 ||
1621 keyp == NULL)
1622 continue;
1623 pkcs11_fetch_keys(p, i, keyp, labelsp, &nkeys);
1624 pkcs11_fetch_certs(p, i, keyp, labelsp, &nkeys);
1625 if (nkeys == 0 && !p->slotinfo[i].logged_in &&
1626 pkcs11_interactive) {
1627 /*
1628 * Some tokens require login before they will
1629 * expose keys.
1630 */
1631 if (pkcs11_login_slot(p, &p->slotinfo[i],
1632 CKU_USER) < 0) {
1633 error("login failed");
1634 continue;
1635 }
1636 pkcs11_fetch_keys(p, i, keyp, labelsp, &nkeys);
1637 pkcs11_fetch_certs(p, i, keyp, labelsp, &nkeys);
1638 }
1639 }
1640
1641 /* now owned by caller */
1642 *providerp = p;
1643
1644 TAILQ_INSERT_TAIL(&pkcs11_providers, p, next);
1645 p->refcount++; /* add to provider list */
1646
1647 return (nkeys);
1648 fail:
1649 if (need_finalize && (rv = f->C_Finalize(NULL)) != CKR_OK)
1650 error("C_Finalize for provider %s failed: %lu",
1651 provider_id, rv);
1652 if (p) {
1653 free(p->name);
1654 free(p->slotlist);
1655 free(p->slotinfo);
1656 free(p);
1657 }
1658 if (handle)
1659 dlclose(handle);
1660 if (ret > 0)
1661 ret = -1;
1662 return (ret);
1663 }
1664
1665 /*
1666 * register a new provider and get number of keys hold by the token,
1667 * fails if provider already exists
1668 */
1669 int
pkcs11_add_provider(char * provider_id,char * pin,struct sshkey *** keyp,char *** labelsp)1670 pkcs11_add_provider(char *provider_id, char *pin, struct sshkey ***keyp,
1671 char ***labelsp)
1672 {
1673 struct pkcs11_provider *p = NULL;
1674 int nkeys;
1675
1676 nkeys = pkcs11_register_provider(provider_id, pin, keyp, labelsp,
1677 &p, CKU_USER);
1678
1679 /* no keys found or some other error, de-register provider */
1680 if (nkeys <= 0 && p != NULL) {
1681 TAILQ_REMOVE(&pkcs11_providers, p, next);
1682 pkcs11_provider_finalize(p);
1683 pkcs11_provider_unref(p);
1684 }
1685 if (nkeys == 0)
1686 debug_f("provider %s returned no keys", provider_id);
1687
1688 return (nkeys);
1689 }
1690
1691 #ifdef WITH_PKCS11_KEYGEN
1692 struct sshkey *
pkcs11_gakp(char * provider_id,char * pin,unsigned int slotidx,char * label,unsigned int type,unsigned int bits,unsigned char keyid,u_int32_t * err)1693 pkcs11_gakp(char *provider_id, char *pin, unsigned int slotidx, char *label,
1694 unsigned int type, unsigned int bits, unsigned char keyid, u_int32_t *err)
1695 {
1696 struct pkcs11_provider *p = NULL;
1697 struct pkcs11_slotinfo *si;
1698 CK_FUNCTION_LIST *f;
1699 CK_SESSION_HANDLE session;
1700 struct sshkey *k = NULL;
1701 int ret = -1, reset_pin = 0, reset_provider = 0;
1702 CK_RV rv;
1703
1704 *err = 0;
1705
1706 if ((p = pkcs11_provider_lookup(provider_id)) != NULL)
1707 debug_f("provider \"%s\" available", provider_id);
1708 else if ((ret = pkcs11_register_provider(provider_id, pin, NULL, NULL,
1709 &p, CKU_SO)) < 0) {
1710 debug_f("could not register provider %s", provider_id);
1711 goto out;
1712 } else
1713 reset_provider = 1;
1714
1715 f = p->function_list;
1716 si = &p->slotinfo[slotidx];
1717 session = si->session;
1718
1719 if ((rv = f->C_SetOperationState(session , pin, strlen(pin),
1720 CK_INVALID_HANDLE, CK_INVALID_HANDLE)) != CKR_OK) {
1721 debug_f("could not supply SO pin: %lu", rv);
1722 reset_pin = 0;
1723 } else
1724 reset_pin = 1;
1725
1726 switch (type) {
1727 case KEY_RSA:
1728 if ((k = pkcs11_rsa_generate_private_key(p, slotidx, label,
1729 bits, keyid, err)) == NULL) {
1730 debug_f("failed to generate RSA key");
1731 goto out;
1732 }
1733 break;
1734 case KEY_ECDSA:
1735 if ((k = pkcs11_ecdsa_generate_private_key(p, slotidx, label,
1736 bits, keyid, err)) == NULL) {
1737 debug_f("failed to generate ECDSA key");
1738 goto out;
1739 }
1740 break;
1741 default:
1742 *err = SSH_PKCS11_ERR_GENERIC;
1743 debug_f("unknown type %d", type);
1744 goto out;
1745 }
1746
1747 out:
1748 if (reset_pin)
1749 f->C_SetOperationState(session , NULL, 0, CK_INVALID_HANDLE,
1750 CK_INVALID_HANDLE);
1751
1752 if (reset_provider)
1753 pkcs11_del_provider(provider_id);
1754
1755 return (k);
1756 }
1757
1758 struct sshkey *
pkcs11_destroy_keypair(char * provider_id,char * pin,unsigned long slotidx,unsigned char keyid,u_int32_t * err)1759 pkcs11_destroy_keypair(char *provider_id, char *pin, unsigned long slotidx,
1760 unsigned char keyid, u_int32_t *err)
1761 {
1762 struct pkcs11_provider *p = NULL;
1763 struct pkcs11_slotinfo *si;
1764 struct sshkey *k = NULL;
1765 int reset_pin = 0, reset_provider = 0;
1766 CK_ULONG nattrs;
1767 CK_FUNCTION_LIST *f;
1768 CK_SESSION_HANDLE session;
1769 CK_ATTRIBUTE attrs[16];
1770 CK_OBJECT_CLASS key_class;
1771 CK_KEY_TYPE key_type;
1772 CK_OBJECT_HANDLE obj = CK_INVALID_HANDLE;
1773 CK_RV rv;
1774
1775 *err = 0;
1776
1777 if ((p = pkcs11_provider_lookup(provider_id)) != NULL) {
1778 debug_f("using provider \"%s\"", provider_id);
1779 } else if (pkcs11_register_provider(provider_id, pin, NULL, NULL, &p,
1780 CKU_SO) < 0) {
1781 debug_f("could not register provider %s",
1782 provider_id);
1783 goto out;
1784 } else
1785 reset_provider = 1;
1786
1787 f = p->function_list;
1788 si = &p->slotinfo[slotidx];
1789 session = si->session;
1790
1791 if ((rv = f->C_SetOperationState(session , pin, strlen(pin),
1792 CK_INVALID_HANDLE, CK_INVALID_HANDLE)) != CKR_OK) {
1793 debug_f("could not supply SO pin: %lu", rv);
1794 reset_pin = 0;
1795 } else
1796 reset_pin = 1;
1797
1798 /* private key */
1799 nattrs = 0;
1800 key_class = CKO_PRIVATE_KEY;
1801 FILL_ATTR(attrs, nattrs, CKA_CLASS, &key_class, sizeof(key_class));
1802 FILL_ATTR(attrs, nattrs, CKA_ID, &keyid, sizeof(keyid));
1803
1804 if (pkcs11_find(p, slotidx, attrs, nattrs, &obj) == 0 &&
1805 obj != CK_INVALID_HANDLE) {
1806 if ((rv = f->C_DestroyObject(session, obj)) != CKR_OK) {
1807 debug_f("could not destroy private key 0x%hhx",
1808 keyid);
1809 *err = rv;
1810 goto out;
1811 }
1812 }
1813
1814 /* public key */
1815 nattrs = 0;
1816 key_class = CKO_PUBLIC_KEY;
1817 FILL_ATTR(attrs, nattrs, CKA_CLASS, &key_class, sizeof(key_class));
1818 FILL_ATTR(attrs, nattrs, CKA_ID, &keyid, sizeof(keyid));
1819
1820 if (pkcs11_find(p, slotidx, attrs, nattrs, &obj) == 0 &&
1821 obj != CK_INVALID_HANDLE) {
1822
1823 /* get key type */
1824 nattrs = 0;
1825 FILL_ATTR(attrs, nattrs, CKA_KEY_TYPE, &key_type,
1826 sizeof(key_type));
1827 rv = f->C_GetAttributeValue(session, obj, attrs, nattrs);
1828 if (rv != CKR_OK) {
1829 debug_f("could not get key type of public key 0x%hhx",
1830 keyid);
1831 *err = rv;
1832 key_type = -1;
1833 }
1834 if (key_type == CKK_RSA)
1835 k = pkcs11_fetch_rsa_pubkey(p, slotidx, &obj);
1836 else if (key_type == CKK_ECDSA)
1837 k = pkcs11_fetch_ecdsa_pubkey(p, slotidx, &obj);
1838
1839 if ((rv = f->C_DestroyObject(session, obj)) != CKR_OK) {
1840 debug_f("could not destroy public key 0x%hhx", keyid);
1841 *err = rv;
1842 goto out;
1843 }
1844 }
1845
1846 out:
1847 if (reset_pin)
1848 f->C_SetOperationState(session , NULL, 0, CK_INVALID_HANDLE,
1849 CK_INVALID_HANDLE);
1850
1851 if (reset_provider)
1852 pkcs11_del_provider(provider_id);
1853
1854 return (k);
1855 }
1856 #endif /* WITH_PKCS11_KEYGEN */
1857 #else /* ENABLE_PKCS11 */
1858
1859 #include <sys/types.h>
1860 #include <stdarg.h>
1861 #include <stdio.h>
1862
1863 #include "log.h"
1864 #include "sshkey.h"
1865
1866 int
pkcs11_init(int interactive)1867 pkcs11_init(int interactive)
1868 {
1869 error("%s: dlopen() not supported", __func__);
1870 return (-1);
1871 }
1872
1873 int
pkcs11_add_provider(char * provider_id,char * pin,struct sshkey *** keyp,char *** labelsp)1874 pkcs11_add_provider(char *provider_id, char *pin, struct sshkey ***keyp,
1875 char ***labelsp)
1876 {
1877 error("%s: dlopen() not supported", __func__);
1878 return (-1);
1879 }
1880
1881 void
pkcs11_terminate(void)1882 pkcs11_terminate(void)
1883 {
1884 error("%s: dlopen() not supported", __func__);
1885 }
1886 #endif /* ENABLE_PKCS11 */
1887