1 /* $OpenBSD: ssh-pkcs11.c,v 1.62 2024/04/02 12:22:38 deraadt 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 #if defined(OPENSSL_HAS_ECC) && defined(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 /* OPENSSL_HAS_ECC && 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 #if defined(OPENSSL_HAS_ECC) && defined(HAVE_EC_KEY_METHOD_NEW)
194 static EC_KEY_METHOD *ec_key_method;
195 static int ec_key_idx = 0;
196 #endif /* OPENSSL_HAS_ECC && HAVE_EC_KEY_METHOD_NEW */
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 #if defined(OPENSSL_HAS_ECC) && defined(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_ex_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 error_f("bad signature length: %lu", (u_long)siglen);
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("BN_bin2bn 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 if (k11->keyid_len > 0) {
615 k11->keyid = xmalloc(k11->keyid_len);
616 memcpy(k11->keyid, keyid_attrib->pValue, k11->keyid_len);
617 }
618 EC_KEY_set_method(ec, ec_key_method);
619 EC_KEY_set_ex_data(ec, ec_key_idx, k11);
620
621 return (0);
622 }
623 #endif /* OPENSSL_HAS_ECC && HAVE_EC_KEY_METHOD_NEW */
624
625 /* remove trailing spaces */
626 static char *
rmspace(u_char * buf,size_t len)627 rmspace(u_char *buf, size_t len)
628 {
629 size_t i;
630
631 if (len == 0)
632 return buf;
633 for (i = len - 1; i > 0; i--)
634 if (buf[i] == ' ')
635 buf[i] = '\0';
636 else
637 break;
638 return buf;
639 }
640 /* Used to printf fixed-width, space-padded, unterminated strings using %.*s */
641 #define RMSPACE(s) (int)sizeof(s), rmspace(s, sizeof(s))
642
643 /*
644 * open a pkcs11 session and login if required.
645 * if pin == NULL we delay login until key use
646 */
647 static int
pkcs11_open_session(struct pkcs11_provider * p,CK_ULONG slotidx,char * pin,CK_ULONG user)648 pkcs11_open_session(struct pkcs11_provider *p, CK_ULONG slotidx, char *pin,
649 CK_ULONG user)
650 {
651 struct pkcs11_slotinfo *si;
652 CK_FUNCTION_LIST *f;
653 CK_RV rv;
654 CK_SESSION_HANDLE session;
655 int login_required, ret;
656
657 f = p->function_list;
658 si = &p->slotinfo[slotidx];
659
660 login_required = si->token.flags & CKF_LOGIN_REQUIRED;
661
662 /* fail early before opening session */
663 if (login_required && !pkcs11_interactive &&
664 (pin == NULL || strlen(pin) == 0)) {
665 error("pin required");
666 return (-SSH_PKCS11_ERR_PIN_REQUIRED);
667 }
668 if ((rv = f->C_OpenSession(p->slotlist[slotidx], CKF_RW_SESSION|
669 CKF_SERIAL_SESSION, NULL, NULL, &session)) != CKR_OK) {
670 error("C_OpenSession failed: %lu", rv);
671 return (-1);
672 }
673 if (login_required && pin != NULL && strlen(pin) != 0) {
674 rv = f->C_Login(session, user, (u_char *)pin, strlen(pin));
675 if (rv != CKR_OK && rv != CKR_USER_ALREADY_LOGGED_IN) {
676 error("C_Login failed: %lu", rv);
677 ret = (rv == CKR_PIN_LOCKED) ?
678 -SSH_PKCS11_ERR_PIN_LOCKED :
679 -SSH_PKCS11_ERR_LOGIN_FAIL;
680 if ((rv = f->C_CloseSession(session)) != CKR_OK)
681 error("C_CloseSession failed: %lu", rv);
682 return (ret);
683 }
684 si->logged_in = 1;
685 }
686 si->session = session;
687 return (0);
688 }
689
690 static int
pkcs11_key_included(struct sshkey *** keysp,int * nkeys,struct sshkey * key)691 pkcs11_key_included(struct sshkey ***keysp, int *nkeys, struct sshkey *key)
692 {
693 int i;
694
695 for (i = 0; i < *nkeys; i++)
696 if (sshkey_equal(key, (*keysp)[i]))
697 return (1);
698 return (0);
699 }
700
701 #if defined(OPENSSL_HAS_ECC) && defined(HAVE_EC_KEY_METHOD_NEW)
702 static struct sshkey *
pkcs11_fetch_ecdsa_pubkey(struct pkcs11_provider * p,CK_ULONG slotidx,CK_OBJECT_HANDLE * obj)703 pkcs11_fetch_ecdsa_pubkey(struct pkcs11_provider *p, CK_ULONG slotidx,
704 CK_OBJECT_HANDLE *obj)
705 {
706 CK_ATTRIBUTE key_attr[3];
707 CK_SESSION_HANDLE session;
708 CK_FUNCTION_LIST *f = NULL;
709 CK_RV rv;
710 ASN1_OCTET_STRING *octet = NULL;
711 EC_KEY *ec = NULL;
712 EC_GROUP *group = NULL;
713 struct sshkey *key = NULL;
714 const unsigned char *attrp = NULL;
715 int i;
716 int nid;
717
718 memset(&key_attr, 0, sizeof(key_attr));
719 key_attr[0].type = CKA_ID;
720 key_attr[1].type = CKA_EC_POINT;
721 key_attr[2].type = CKA_EC_PARAMS;
722
723 session = p->slotinfo[slotidx].session;
724 f = p->function_list;
725
726 /* figure out size of the attributes */
727 rv = f->C_GetAttributeValue(session, *obj, key_attr, 3);
728 if (rv != CKR_OK) {
729 error("C_GetAttributeValue failed: %lu", rv);
730 return (NULL);
731 }
732
733 /*
734 * Allow CKA_ID (always first attribute) to be empty, but
735 * ensure that none of the others are zero length.
736 * XXX assumes CKA_ID is always first.
737 */
738 if (key_attr[1].ulValueLen == 0 ||
739 key_attr[2].ulValueLen == 0) {
740 error("invalid attribute length");
741 return (NULL);
742 }
743
744 /* allocate buffers for attributes */
745 for (i = 0; i < 3; i++)
746 if (key_attr[i].ulValueLen > 0)
747 key_attr[i].pValue = xcalloc(1, key_attr[i].ulValueLen);
748
749 /* retrieve ID, public point and curve parameters of EC key */
750 rv = f->C_GetAttributeValue(session, *obj, key_attr, 3);
751 if (rv != CKR_OK) {
752 error("C_GetAttributeValue failed: %lu", rv);
753 goto fail;
754 }
755
756 ec = EC_KEY_new();
757 if (ec == NULL) {
758 error("EC_KEY_new failed");
759 goto fail;
760 }
761
762 attrp = key_attr[2].pValue;
763 group = d2i_ECPKParameters(NULL, &attrp, key_attr[2].ulValueLen);
764 if (group == NULL) {
765 ossl_error("d2i_ECPKParameters failed");
766 goto fail;
767 }
768
769 if (EC_KEY_set_group(ec, group) == 0) {
770 ossl_error("EC_KEY_set_group failed");
771 goto fail;
772 }
773
774 if (key_attr[1].ulValueLen <= 2) {
775 error("CKA_EC_POINT too small");
776 goto fail;
777 }
778
779 attrp = key_attr[1].pValue;
780 octet = d2i_ASN1_OCTET_STRING(NULL, &attrp, key_attr[1].ulValueLen);
781 if (octet == NULL) {
782 ossl_error("d2i_ASN1_OCTET_STRING failed");
783 goto fail;
784 }
785 attrp = octet->data;
786 if (o2i_ECPublicKey(&ec, &attrp, octet->length) == NULL) {
787 ossl_error("o2i_ECPublicKey failed");
788 goto fail;
789 }
790
791 nid = sshkey_ecdsa_key_to_nid(ec);
792 if (nid < 0) {
793 error("couldn't get curve nid");
794 goto fail;
795 }
796
797 if (pkcs11_ecdsa_wrap(p, slotidx, &key_attr[0], ec))
798 goto fail;
799
800 key = sshkey_new(KEY_UNSPEC);
801 if (key == NULL) {
802 error("sshkey_new failed");
803 goto fail;
804 }
805
806 key->ecdsa = ec;
807 key->ecdsa_nid = nid;
808 key->type = KEY_ECDSA;
809 key->flags |= SSHKEY_FLAG_EXT;
810 ec = NULL; /* now owned by key */
811
812 fail:
813 for (i = 0; i < 3; i++)
814 free(key_attr[i].pValue);
815 if (ec)
816 EC_KEY_free(ec);
817 if (group)
818 EC_GROUP_free(group);
819 if (octet)
820 ASN1_OCTET_STRING_free(octet);
821
822 return (key);
823 }
824 #endif /* OPENSSL_HAS_ECC && HAVE_EC_KEY_METHOD_NEW */
825
826 static struct sshkey *
pkcs11_fetch_rsa_pubkey(struct pkcs11_provider * p,CK_ULONG slotidx,CK_OBJECT_HANDLE * obj)827 pkcs11_fetch_rsa_pubkey(struct pkcs11_provider *p, CK_ULONG slotidx,
828 CK_OBJECT_HANDLE *obj)
829 {
830 CK_ATTRIBUTE key_attr[3];
831 CK_SESSION_HANDLE session;
832 CK_FUNCTION_LIST *f = NULL;
833 CK_RV rv;
834 RSA *rsa = NULL;
835 BIGNUM *rsa_n, *rsa_e;
836 struct sshkey *key = NULL;
837 int i;
838
839 memset(&key_attr, 0, sizeof(key_attr));
840 key_attr[0].type = CKA_ID;
841 key_attr[1].type = CKA_MODULUS;
842 key_attr[2].type = CKA_PUBLIC_EXPONENT;
843
844 session = p->slotinfo[slotidx].session;
845 f = p->function_list;
846
847 /* figure out size of the attributes */
848 rv = f->C_GetAttributeValue(session, *obj, key_attr, 3);
849 if (rv != CKR_OK) {
850 error("C_GetAttributeValue failed: %lu", rv);
851 return (NULL);
852 }
853
854 /*
855 * Allow CKA_ID (always first attribute) to be empty, but
856 * ensure that none of the others are zero length.
857 * XXX assumes CKA_ID is always first.
858 */
859 if (key_attr[1].ulValueLen == 0 ||
860 key_attr[2].ulValueLen == 0) {
861 error("invalid attribute length");
862 return (NULL);
863 }
864
865 /* allocate buffers for attributes */
866 for (i = 0; i < 3; i++)
867 if (key_attr[i].ulValueLen > 0)
868 key_attr[i].pValue = xcalloc(1, key_attr[i].ulValueLen);
869
870 /* retrieve ID, modulus and public exponent of RSA key */
871 rv = f->C_GetAttributeValue(session, *obj, key_attr, 3);
872 if (rv != CKR_OK) {
873 error("C_GetAttributeValue failed: %lu", rv);
874 goto fail;
875 }
876
877 rsa = RSA_new();
878 if (rsa == NULL) {
879 error("RSA_new failed");
880 goto fail;
881 }
882
883 rsa_n = BN_bin2bn(key_attr[1].pValue, key_attr[1].ulValueLen, NULL);
884 rsa_e = BN_bin2bn(key_attr[2].pValue, key_attr[2].ulValueLen, NULL);
885 if (rsa_n == NULL || rsa_e == NULL) {
886 error("BN_bin2bn failed");
887 goto fail;
888 }
889 if (!RSA_set0_key(rsa, rsa_n, rsa_e, NULL))
890 fatal_f("set key");
891 rsa_n = rsa_e = NULL; /* transferred */
892
893 if (pkcs11_rsa_wrap(p, slotidx, &key_attr[0], rsa))
894 goto fail;
895
896 key = sshkey_new(KEY_UNSPEC);
897 if (key == NULL) {
898 error("sshkey_new failed");
899 goto fail;
900 }
901
902 key->rsa = rsa;
903 key->type = KEY_RSA;
904 key->flags |= SSHKEY_FLAG_EXT;
905 rsa = NULL; /* now owned by key */
906
907 fail:
908 for (i = 0; i < 3; i++)
909 free(key_attr[i].pValue);
910 RSA_free(rsa);
911
912 return (key);
913 }
914
915 static int
pkcs11_fetch_x509_pubkey(struct pkcs11_provider * p,CK_ULONG slotidx,CK_OBJECT_HANDLE * obj,struct sshkey ** keyp,char ** labelp)916 pkcs11_fetch_x509_pubkey(struct pkcs11_provider *p, CK_ULONG slotidx,
917 CK_OBJECT_HANDLE *obj, struct sshkey **keyp, char **labelp)
918 {
919 CK_ATTRIBUTE cert_attr[3];
920 CK_SESSION_HANDLE session;
921 CK_FUNCTION_LIST *f = NULL;
922 CK_RV rv;
923 X509 *x509 = NULL;
924 X509_NAME *x509_name = NULL;
925 EVP_PKEY *evp;
926 RSA *rsa = NULL;
927 #ifdef OPENSSL_HAS_ECC
928 EC_KEY *ec = NULL;
929 #endif
930 struct sshkey *key = NULL;
931 int i;
932 #if defined(OPENSSL_HAS_ECC) && defined(HAVE_EC_KEY_METHOD_NEW)
933 int nid;
934 #endif
935 const u_char *cp;
936 char *subject = NULL;
937
938 *keyp = NULL;
939 *labelp = NULL;
940
941 memset(&cert_attr, 0, sizeof(cert_attr));
942 cert_attr[0].type = CKA_ID;
943 cert_attr[1].type = CKA_SUBJECT;
944 cert_attr[2].type = CKA_VALUE;
945
946 session = p->slotinfo[slotidx].session;
947 f = p->function_list;
948
949 /* figure out size of the attributes */
950 rv = f->C_GetAttributeValue(session, *obj, cert_attr, 3);
951 if (rv != CKR_OK) {
952 error("C_GetAttributeValue failed: %lu", rv);
953 return -1;
954 }
955
956 /*
957 * Allow CKA_ID (always first attribute) to be empty, but
958 * ensure that none of the others are zero length.
959 * XXX assumes CKA_ID is always first.
960 */
961 if (cert_attr[1].ulValueLen == 0 ||
962 cert_attr[2].ulValueLen == 0) {
963 error("invalid attribute length");
964 return -1;
965 }
966
967 /* allocate buffers for attributes */
968 for (i = 0; i < 3; i++)
969 if (cert_attr[i].ulValueLen > 0)
970 cert_attr[i].pValue = xcalloc(1, cert_attr[i].ulValueLen);
971
972 /* retrieve ID, subject and value of certificate */
973 rv = f->C_GetAttributeValue(session, *obj, cert_attr, 3);
974 if (rv != CKR_OK) {
975 error("C_GetAttributeValue failed: %lu", rv);
976 goto out;
977 }
978
979 /* Decode DER-encoded cert subject */
980 cp = cert_attr[1].pValue;
981 if ((x509_name = d2i_X509_NAME(NULL, &cp,
982 cert_attr[1].ulValueLen)) == NULL ||
983 (subject = X509_NAME_oneline(x509_name, NULL, 0)) == NULL)
984 subject = xstrdup("invalid subject");
985 X509_NAME_free(x509_name);
986
987 cp = cert_attr[2].pValue;
988 if ((x509 = d2i_X509(NULL, &cp, cert_attr[2].ulValueLen)) == NULL) {
989 error("d2i_x509 failed");
990 goto out;
991 }
992
993 if ((evp = X509_get_pubkey(x509)) == NULL) {
994 error("X509_get_pubkey failed");
995 goto out;
996 }
997
998 if (EVP_PKEY_base_id(evp) == EVP_PKEY_RSA) {
999 if (EVP_PKEY_get0_RSA(evp) == NULL) {
1000 error("invalid x509; no rsa key");
1001 goto out;
1002 }
1003 if ((rsa = RSAPublicKey_dup(EVP_PKEY_get0_RSA(evp))) == NULL) {
1004 error("RSAPublicKey_dup failed");
1005 goto out;
1006 }
1007
1008 if (pkcs11_rsa_wrap(p, slotidx, &cert_attr[0], rsa))
1009 goto out;
1010
1011 key = sshkey_new(KEY_UNSPEC);
1012 if (key == NULL) {
1013 error("sshkey_new failed");
1014 goto out;
1015 }
1016
1017 key->rsa = rsa;
1018 key->type = KEY_RSA;
1019 key->flags |= SSHKEY_FLAG_EXT;
1020 rsa = NULL; /* now owned by key */
1021 #if defined(OPENSSL_HAS_ECC) && defined(HAVE_EC_KEY_METHOD_NEW)
1022 } else if (EVP_PKEY_base_id(evp) == EVP_PKEY_EC) {
1023 if (EVP_PKEY_get0_EC_KEY(evp) == NULL) {
1024 error("invalid x509; no ec key");
1025 goto out;
1026 }
1027 if ((ec = EC_KEY_dup(EVP_PKEY_get0_EC_KEY(evp))) == NULL) {
1028 error("EC_KEY_dup failed");
1029 goto out;
1030 }
1031
1032 nid = sshkey_ecdsa_key_to_nid(ec);
1033 if (nid < 0) {
1034 error("couldn't get curve nid");
1035 goto out;
1036 }
1037
1038 if (pkcs11_ecdsa_wrap(p, slotidx, &cert_attr[0], ec))
1039 goto out;
1040
1041 key = sshkey_new(KEY_UNSPEC);
1042 if (key == NULL) {
1043 error("sshkey_new failed");
1044 goto out;
1045 }
1046
1047 key->ecdsa = ec;
1048 key->ecdsa_nid = nid;
1049 key->type = KEY_ECDSA;
1050 key->flags |= SSHKEY_FLAG_EXT;
1051 ec = NULL; /* now owned by key */
1052 #endif /* OPENSSL_HAS_ECC && HAVE_EC_KEY_METHOD_NEW */
1053 } else {
1054 error("unknown certificate key type");
1055 goto out;
1056 }
1057 out:
1058 for (i = 0; i < 3; i++)
1059 free(cert_attr[i].pValue);
1060 X509_free(x509);
1061 RSA_free(rsa);
1062 #ifdef OPENSSL_HAS_ECC
1063 EC_KEY_free(ec);
1064 #endif
1065 if (key == NULL) {
1066 free(subject);
1067 return -1;
1068 }
1069 /* success */
1070 *keyp = key;
1071 *labelp = subject;
1072 return 0;
1073 }
1074
1075 #if 0
1076 static int
1077 have_rsa_key(const RSA *rsa)
1078 {
1079 const BIGNUM *rsa_n, *rsa_e;
1080
1081 RSA_get0_key(rsa, &rsa_n, &rsa_e, NULL);
1082 return rsa_n != NULL && rsa_e != NULL;
1083 }
1084 #endif
1085
1086 static void
note_key(struct pkcs11_provider * p,CK_ULONG slotidx,const char * context,struct sshkey * key)1087 note_key(struct pkcs11_provider *p, CK_ULONG slotidx, const char *context,
1088 struct sshkey *key)
1089 {
1090 char *fp;
1091
1092 if ((fp = sshkey_fingerprint(key, SSH_FP_HASH_DEFAULT,
1093 SSH_FP_DEFAULT)) == NULL) {
1094 error_f("sshkey_fingerprint failed");
1095 return;
1096 }
1097 debug2("%s: provider %s slot %lu: %s %s", context, p->name,
1098 (u_long)slotidx, sshkey_type(key), fp);
1099 free(fp);
1100 }
1101
1102 /*
1103 * lookup certificates for token in slot identified by slotidx,
1104 * add 'wrapped' public keys to the 'keysp' array and increment nkeys.
1105 * keysp points to an (possibly empty) array with *nkeys keys.
1106 */
1107 static int
pkcs11_fetch_certs(struct pkcs11_provider * p,CK_ULONG slotidx,struct sshkey *** keysp,char *** labelsp,int * nkeys)1108 pkcs11_fetch_certs(struct pkcs11_provider *p, CK_ULONG slotidx,
1109 struct sshkey ***keysp, char ***labelsp, int *nkeys)
1110 {
1111 struct sshkey *key = NULL;
1112 CK_OBJECT_CLASS key_class;
1113 CK_ATTRIBUTE key_attr[1];
1114 CK_SESSION_HANDLE session;
1115 CK_FUNCTION_LIST *f = NULL;
1116 CK_RV rv;
1117 CK_OBJECT_HANDLE obj;
1118 CK_ULONG n = 0;
1119 int ret = -1;
1120 char *label;
1121
1122 memset(&key_attr, 0, sizeof(key_attr));
1123 memset(&obj, 0, sizeof(obj));
1124
1125 key_class = CKO_CERTIFICATE;
1126 key_attr[0].type = CKA_CLASS;
1127 key_attr[0].pValue = &key_class;
1128 key_attr[0].ulValueLen = sizeof(key_class);
1129
1130 session = p->slotinfo[slotidx].session;
1131 f = p->function_list;
1132
1133 rv = f->C_FindObjectsInit(session, key_attr, 1);
1134 if (rv != CKR_OK) {
1135 error("C_FindObjectsInit failed: %lu", rv);
1136 goto fail;
1137 }
1138
1139 while (1) {
1140 CK_CERTIFICATE_TYPE ck_cert_type;
1141
1142 rv = f->C_FindObjects(session, &obj, 1, &n);
1143 if (rv != CKR_OK) {
1144 error("C_FindObjects failed: %lu", rv);
1145 goto fail;
1146 }
1147 if (n == 0)
1148 break;
1149
1150 memset(&ck_cert_type, 0, sizeof(ck_cert_type));
1151 memset(&key_attr, 0, sizeof(key_attr));
1152 key_attr[0].type = CKA_CERTIFICATE_TYPE;
1153 key_attr[0].pValue = &ck_cert_type;
1154 key_attr[0].ulValueLen = sizeof(ck_cert_type);
1155
1156 rv = f->C_GetAttributeValue(session, obj, key_attr, 1);
1157 if (rv != CKR_OK) {
1158 error("C_GetAttributeValue failed: %lu", rv);
1159 goto fail;
1160 }
1161
1162 key = NULL;
1163 label = NULL;
1164 switch (ck_cert_type) {
1165 case CKC_X_509:
1166 if (pkcs11_fetch_x509_pubkey(p, slotidx, &obj,
1167 &key, &label) != 0) {
1168 error("failed to fetch key");
1169 continue;
1170 }
1171 break;
1172 default:
1173 error("skipping unsupported certificate type %lu",
1174 ck_cert_type);
1175 continue;
1176 }
1177 note_key(p, slotidx, __func__, key);
1178 if (pkcs11_key_included(keysp, nkeys, key)) {
1179 debug2_f("key already included");;
1180 sshkey_free(key);
1181 } else {
1182 /* expand key array and add key */
1183 *keysp = xrecallocarray(*keysp, *nkeys,
1184 *nkeys + 1, sizeof(struct sshkey *));
1185 (*keysp)[*nkeys] = key;
1186 if (labelsp != NULL) {
1187 *labelsp = xrecallocarray(*labelsp, *nkeys,
1188 *nkeys + 1, sizeof(char *));
1189 (*labelsp)[*nkeys] = xstrdup((char *)label);
1190 }
1191 *nkeys = *nkeys + 1;
1192 debug("have %d keys", *nkeys);
1193 }
1194 }
1195
1196 ret = 0;
1197 fail:
1198 rv = f->C_FindObjectsFinal(session);
1199 if (rv != CKR_OK) {
1200 error("C_FindObjectsFinal failed: %lu", rv);
1201 ret = -1;
1202 }
1203
1204 return (ret);
1205 }
1206
1207 /*
1208 * lookup public keys for token in slot identified by slotidx,
1209 * add 'wrapped' public keys to the 'keysp' array and increment nkeys.
1210 * keysp points to an (possibly empty) array with *nkeys keys.
1211 */
1212 static int
pkcs11_fetch_keys(struct pkcs11_provider * p,CK_ULONG slotidx,struct sshkey *** keysp,char *** labelsp,int * nkeys)1213 pkcs11_fetch_keys(struct pkcs11_provider *p, CK_ULONG slotidx,
1214 struct sshkey ***keysp, char ***labelsp, int *nkeys)
1215 {
1216 struct sshkey *key = NULL;
1217 CK_OBJECT_CLASS key_class;
1218 CK_ATTRIBUTE key_attr[2];
1219 CK_SESSION_HANDLE session;
1220 CK_FUNCTION_LIST *f = NULL;
1221 CK_RV rv;
1222 CK_OBJECT_HANDLE obj;
1223 CK_ULONG n = 0;
1224 int ret = -1;
1225
1226 memset(&key_attr, 0, sizeof(key_attr));
1227 memset(&obj, 0, sizeof(obj));
1228
1229 key_class = CKO_PUBLIC_KEY;
1230 key_attr[0].type = CKA_CLASS;
1231 key_attr[0].pValue = &key_class;
1232 key_attr[0].ulValueLen = sizeof(key_class);
1233
1234 session = p->slotinfo[slotidx].session;
1235 f = p->function_list;
1236
1237 rv = f->C_FindObjectsInit(session, key_attr, 1);
1238 if (rv != CKR_OK) {
1239 error("C_FindObjectsInit failed: %lu", rv);
1240 goto fail;
1241 }
1242
1243 while (1) {
1244 CK_KEY_TYPE ck_key_type;
1245 CK_UTF8CHAR label[256];
1246
1247 rv = f->C_FindObjects(session, &obj, 1, &n);
1248 if (rv != CKR_OK) {
1249 error("C_FindObjects failed: %lu", rv);
1250 goto fail;
1251 }
1252 if (n == 0)
1253 break;
1254
1255 memset(&ck_key_type, 0, sizeof(ck_key_type));
1256 memset(&key_attr, 0, sizeof(key_attr));
1257 key_attr[0].type = CKA_KEY_TYPE;
1258 key_attr[0].pValue = &ck_key_type;
1259 key_attr[0].ulValueLen = sizeof(ck_key_type);
1260 key_attr[1].type = CKA_LABEL;
1261 key_attr[1].pValue = &label;
1262 key_attr[1].ulValueLen = sizeof(label) - 1;
1263
1264 rv = f->C_GetAttributeValue(session, obj, key_attr, 2);
1265 if (rv != CKR_OK) {
1266 error("C_GetAttributeValue failed: %lu", rv);
1267 goto fail;
1268 }
1269
1270 label[key_attr[1].ulValueLen] = '\0';
1271
1272 switch (ck_key_type) {
1273 case CKK_RSA:
1274 key = pkcs11_fetch_rsa_pubkey(p, slotidx, &obj);
1275 break;
1276 #if defined(OPENSSL_HAS_ECC) && defined(HAVE_EC_KEY_METHOD_NEW)
1277 case CKK_ECDSA:
1278 key = pkcs11_fetch_ecdsa_pubkey(p, slotidx, &obj);
1279 break;
1280 #endif /* OPENSSL_HAS_ECC && HAVE_EC_KEY_METHOD_NEW */
1281 default:
1282 /* XXX print key type? */
1283 key = NULL;
1284 error("skipping unsupported key type");
1285 }
1286
1287 if (key == NULL) {
1288 error("failed to fetch key");
1289 continue;
1290 }
1291 note_key(p, slotidx, __func__, key);
1292 if (pkcs11_key_included(keysp, nkeys, key)) {
1293 debug2_f("key already included");;
1294 sshkey_free(key);
1295 } else {
1296 /* expand key array and add key */
1297 *keysp = xrecallocarray(*keysp, *nkeys,
1298 *nkeys + 1, sizeof(struct sshkey *));
1299 (*keysp)[*nkeys] = key;
1300 if (labelsp != NULL) {
1301 *labelsp = xrecallocarray(*labelsp, *nkeys,
1302 *nkeys + 1, sizeof(char *));
1303 (*labelsp)[*nkeys] = xstrdup((char *)label);
1304 }
1305 *nkeys = *nkeys + 1;
1306 debug("have %d keys", *nkeys);
1307 }
1308 }
1309
1310 ret = 0;
1311 fail:
1312 rv = f->C_FindObjectsFinal(session);
1313 if (rv != CKR_OK) {
1314 error("C_FindObjectsFinal failed: %lu", rv);
1315 ret = -1;
1316 }
1317
1318 return (ret);
1319 }
1320
1321 #ifdef WITH_PKCS11_KEYGEN
1322 #define FILL_ATTR(attr, idx, typ, val, len) \
1323 { (attr[idx]).type=(typ); (attr[idx]).pValue=(val); (attr[idx]).ulValueLen=len; idx++; }
1324
1325 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)1326 pkcs11_rsa_generate_private_key(struct pkcs11_provider *p, CK_ULONG slotidx,
1327 char *label, CK_ULONG bits, CK_BYTE keyid, u_int32_t *err)
1328 {
1329 struct pkcs11_slotinfo *si;
1330 char *plabel = label ? label : "";
1331 int npub = 0, npriv = 0;
1332 CK_RV rv;
1333 CK_FUNCTION_LIST *f;
1334 CK_SESSION_HANDLE session;
1335 CK_BBOOL true_val = CK_TRUE, false_val = CK_FALSE;
1336 CK_OBJECT_HANDLE pubKey, privKey;
1337 CK_ATTRIBUTE tpub[16], tpriv[16];
1338 CK_MECHANISM mech = {
1339 CKM_RSA_PKCS_KEY_PAIR_GEN, NULL_PTR, 0
1340 };
1341 CK_BYTE pubExponent[] = {
1342 0x01, 0x00, 0x01 /* RSA_F4 in bytes */
1343 };
1344 pubkey_filter[0].pValue = &pubkey_class;
1345 cert_filter[0].pValue = &cert_class;
1346
1347 *err = 0;
1348
1349 FILL_ATTR(tpub, npub, CKA_TOKEN, &true_val, sizeof(true_val));
1350 FILL_ATTR(tpub, npub, CKA_LABEL, plabel, strlen(plabel));
1351 FILL_ATTR(tpub, npub, CKA_ENCRYPT, &false_val, sizeof(false_val));
1352 FILL_ATTR(tpub, npub, CKA_VERIFY, &true_val, sizeof(true_val));
1353 FILL_ATTR(tpub, npub, CKA_VERIFY_RECOVER, &false_val,
1354 sizeof(false_val));
1355 FILL_ATTR(tpub, npub, CKA_WRAP, &false_val, sizeof(false_val));
1356 FILL_ATTR(tpub, npub, CKA_DERIVE, &false_val, sizeof(false_val));
1357 FILL_ATTR(tpub, npub, CKA_MODULUS_BITS, &bits, sizeof(bits));
1358 FILL_ATTR(tpub, npub, CKA_PUBLIC_EXPONENT, pubExponent,
1359 sizeof(pubExponent));
1360 FILL_ATTR(tpub, npub, CKA_ID, &keyid, sizeof(keyid));
1361
1362 FILL_ATTR(tpriv, npriv, CKA_TOKEN, &true_val, sizeof(true_val));
1363 FILL_ATTR(tpriv, npriv, CKA_LABEL, plabel, strlen(plabel));
1364 FILL_ATTR(tpriv, npriv, CKA_PRIVATE, &true_val, sizeof(true_val));
1365 FILL_ATTR(tpriv, npriv, CKA_SENSITIVE, &true_val, sizeof(true_val));
1366 FILL_ATTR(tpriv, npriv, CKA_DECRYPT, &false_val, sizeof(false_val));
1367 FILL_ATTR(tpriv, npriv, CKA_SIGN, &true_val, sizeof(true_val));
1368 FILL_ATTR(tpriv, npriv, CKA_SIGN_RECOVER, &false_val,
1369 sizeof(false_val));
1370 FILL_ATTR(tpriv, npriv, CKA_UNWRAP, &false_val, sizeof(false_val));
1371 FILL_ATTR(tpriv, npriv, CKA_DERIVE, &false_val, sizeof(false_val));
1372 FILL_ATTR(tpriv, npriv, CKA_ID, &keyid, sizeof(keyid));
1373
1374 f = p->function_list;
1375 si = &p->slotinfo[slotidx];
1376 session = si->session;
1377
1378 if ((rv = f->C_GenerateKeyPair(session, &mech, tpub, npub, tpriv, npriv,
1379 &pubKey, &privKey)) != CKR_OK) {
1380 error_f("key generation failed: error 0x%lx", rv);
1381 *err = rv;
1382 return NULL;
1383 }
1384
1385 return pkcs11_fetch_rsa_pubkey(p, slotidx, &pubKey);
1386 }
1387
1388 static int
h2i(char c)1389 h2i(char c)
1390 {
1391 if (c >= '0' && c <= '9')
1392 return c - '0';
1393 else if (c >= 'a' && c <= 'f')
1394 return c - 'a' + 10;
1395 else if (c >= 'A' && c <= 'F')
1396 return c - 'A' + 10;
1397 else
1398 return -1;
1399 }
1400
1401 static int
pkcs11_decode_hex(const char * hex,unsigned char ** dest,size_t * rlen)1402 pkcs11_decode_hex(const char *hex, unsigned char **dest, size_t *rlen)
1403 {
1404 size_t i, len;
1405
1406 if (dest)
1407 *dest = NULL;
1408 if (rlen)
1409 *rlen = 0;
1410
1411 if ((len = strlen(hex)) % 2)
1412 return -1;
1413 len /= 2;
1414
1415 *dest = xmalloc(len);
1416
1417 for (i = 0; i < len; i++) {
1418 int hi, low;
1419
1420 hi = h2i(hex[2 * i]);
1421 lo = h2i(hex[(2 * i) + 1]);
1422 if (hi == -1 || lo == -1)
1423 return -1;
1424 (*dest)[i] = (hi << 4) | lo;
1425 }
1426
1427 if (rlen)
1428 *rlen = len;
1429
1430 return 0;
1431 }
1432
1433 static struct ec_curve_info {
1434 const char *name;
1435 const char *oid;
1436 const char *oid_encoded;
1437 size_t size;
1438 } ec_curve_infos[] = {
1439 {"prime256v1", "1.2.840.10045.3.1.7", "06082A8648CE3D030107", 256},
1440 {"secp384r1", "1.3.132.0.34", "06052B81040022", 384},
1441 {"secp521r1", "1.3.132.0.35", "06052B81040023", 521},
1442 {NULL, NULL, NULL, 0},
1443 };
1444
1445 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)1446 pkcs11_ecdsa_generate_private_key(struct pkcs11_provider *p, CK_ULONG slotidx,
1447 char *label, CK_ULONG bits, CK_BYTE keyid, u_int32_t *err)
1448 {
1449 struct pkcs11_slotinfo *si;
1450 char *plabel = label ? label : "";
1451 int i;
1452 size_t ecparams_size;
1453 unsigned char *ecparams = NULL;
1454 int npub = 0, npriv = 0;
1455 CK_RV rv;
1456 CK_FUNCTION_LIST *f;
1457 CK_SESSION_HANDLE session;
1458 CK_BBOOL true_val = CK_TRUE, false_val = CK_FALSE;
1459 CK_OBJECT_HANDLE pubKey, privKey;
1460 CK_MECHANISM mech = {
1461 CKM_EC_KEY_PAIR_GEN, NULL_PTR, 0
1462 };
1463 CK_ATTRIBUTE tpub[16], tpriv[16];
1464
1465 *err = 0;
1466
1467 for (i = 0; ec_curve_infos[i].name; i++) {
1468 if (ec_curve_infos[i].size == bits)
1469 break;
1470 }
1471 if (!ec_curve_infos[i].name) {
1472 error_f("invalid key size %lu", bits);
1473 return NULL;
1474 }
1475 if (pkcs11_decode_hex(ec_curve_infos[i].oid_encoded, &ecparams,
1476 &ecparams_size) == -1) {
1477 error_f("invalid oid");
1478 return NULL;
1479 }
1480
1481 FILL_ATTR(tpub, npub, CKA_TOKEN, &true_val, sizeof(true_val));
1482 FILL_ATTR(tpub, npub, CKA_LABEL, plabel, strlen(plabel));
1483 FILL_ATTR(tpub, npub, CKA_ENCRYPT, &false_val, sizeof(false_val));
1484 FILL_ATTR(tpub, npub, CKA_VERIFY, &true_val, sizeof(true_val));
1485 FILL_ATTR(tpub, npub, CKA_VERIFY_RECOVER, &false_val,
1486 sizeof(false_val));
1487 FILL_ATTR(tpub, npub, CKA_WRAP, &false_val, sizeof(false_val));
1488 FILL_ATTR(tpub, npub, CKA_DERIVE, &false_val, sizeof(false_val));
1489 FILL_ATTR(tpub, npub, CKA_EC_PARAMS, ecparams, ecparams_size);
1490 FILL_ATTR(tpub, npub, CKA_ID, &keyid, sizeof(keyid));
1491
1492 FILL_ATTR(tpriv, npriv, CKA_TOKEN, &true_val, sizeof(true_val));
1493 FILL_ATTR(tpriv, npriv, CKA_LABEL, plabel, strlen(plabel));
1494 FILL_ATTR(tpriv, npriv, CKA_PRIVATE, &true_val, sizeof(true_val));
1495 FILL_ATTR(tpriv, npriv, CKA_SENSITIVE, &true_val, sizeof(true_val));
1496 FILL_ATTR(tpriv, npriv, CKA_DECRYPT, &false_val, sizeof(false_val));
1497 FILL_ATTR(tpriv, npriv, CKA_SIGN, &true_val, sizeof(true_val));
1498 FILL_ATTR(tpriv, npriv, CKA_SIGN_RECOVER, &false_val,
1499 sizeof(false_val));
1500 FILL_ATTR(tpriv, npriv, CKA_UNWRAP, &false_val, sizeof(false_val));
1501 FILL_ATTR(tpriv, npriv, CKA_DERIVE, &false_val, sizeof(false_val));
1502 FILL_ATTR(tpriv, npriv, CKA_ID, &keyid, sizeof(keyid));
1503
1504 f = p->function_list;
1505 si = &p->slotinfo[slotidx];
1506 session = si->session;
1507
1508 if ((rv = f->C_GenerateKeyPair(session, &mech, tpub, npub, tpriv, npriv,
1509 &pubKey, &privKey)) != CKR_OK) {
1510 error_f("key generation failed: error 0x%lx", rv);
1511 *err = rv;
1512 return NULL;
1513 }
1514
1515 return pkcs11_fetch_ecdsa_pubkey(p, slotidx, &pubKey);
1516 }
1517 #endif /* WITH_PKCS11_KEYGEN */
1518
1519 /*
1520 * register a new provider, fails if provider already exists. if
1521 * keyp is provided, fetch keys.
1522 */
1523 static int
pkcs11_register_provider(char * provider_id,char * pin,struct sshkey *** keyp,char *** labelsp,struct pkcs11_provider ** providerp,CK_ULONG user)1524 pkcs11_register_provider(char *provider_id, char *pin,
1525 struct sshkey ***keyp, char ***labelsp,
1526 struct pkcs11_provider **providerp, CK_ULONG user)
1527 {
1528 int nkeys, need_finalize = 0;
1529 int ret = -1;
1530 struct pkcs11_provider *p = NULL;
1531 void *handle = NULL;
1532 CK_RV (*getfunctionlist)(CK_FUNCTION_LIST **);
1533 CK_RV rv;
1534 CK_FUNCTION_LIST *f = NULL;
1535 CK_TOKEN_INFO *token;
1536 CK_ULONG i;
1537
1538 if (providerp == NULL)
1539 goto fail;
1540 *providerp = NULL;
1541
1542 if (keyp != NULL)
1543 *keyp = NULL;
1544 if (labelsp != NULL)
1545 *labelsp = NULL;
1546
1547 if (pkcs11_provider_lookup(provider_id) != NULL) {
1548 debug_f("provider already registered: %s", provider_id);
1549 goto fail;
1550 }
1551 if (lib_contains_symbol(provider_id, "C_GetFunctionList") != 0) {
1552 error("provider %s is not a PKCS11 library", provider_id);
1553 goto fail;
1554 }
1555 /* open shared pkcs11-library */
1556 if ((handle = dlopen(provider_id, RTLD_NOW)) == NULL) {
1557 error("dlopen %s failed: %s", provider_id, dlerror());
1558 goto fail;
1559 }
1560 if ((getfunctionlist = dlsym(handle, "C_GetFunctionList")) == NULL)
1561 fatal("dlsym(C_GetFunctionList) failed: %s", dlerror());
1562 p = xcalloc(1, sizeof(*p));
1563 p->name = xstrdup(provider_id);
1564 p->handle = handle;
1565 /* setup the pkcs11 callbacks */
1566 if ((rv = (*getfunctionlist)(&f)) != CKR_OK) {
1567 error("C_GetFunctionList for provider %s failed: %lu",
1568 provider_id, rv);
1569 goto fail;
1570 }
1571 p->function_list = f;
1572 if ((rv = f->C_Initialize(NULL)) != CKR_OK) {
1573 error("C_Initialize for provider %s failed: %lu",
1574 provider_id, rv);
1575 goto fail;
1576 }
1577 need_finalize = 1;
1578 if ((rv = f->C_GetInfo(&p->info)) != CKR_OK) {
1579 error("C_GetInfo for provider %s failed: %lu",
1580 provider_id, rv);
1581 goto fail;
1582 }
1583 debug("provider %s: manufacturerID <%.*s> cryptokiVersion %d.%d"
1584 " libraryDescription <%.*s> libraryVersion %d.%d",
1585 provider_id,
1586 RMSPACE(p->info.manufacturerID),
1587 p->info.cryptokiVersion.major,
1588 p->info.cryptokiVersion.minor,
1589 RMSPACE(p->info.libraryDescription),
1590 p->info.libraryVersion.major,
1591 p->info.libraryVersion.minor);
1592 if ((rv = f->C_GetSlotList(CK_TRUE, NULL, &p->nslots)) != CKR_OK) {
1593 error("C_GetSlotList failed: %lu", rv);
1594 goto fail;
1595 }
1596 if (p->nslots == 0) {
1597 debug_f("provider %s returned no slots", provider_id);
1598 ret = -SSH_PKCS11_ERR_NO_SLOTS;
1599 goto fail;
1600 }
1601 p->slotlist = xcalloc(p->nslots, sizeof(CK_SLOT_ID));
1602 if ((rv = f->C_GetSlotList(CK_TRUE, p->slotlist, &p->nslots))
1603 != CKR_OK) {
1604 error("C_GetSlotList for provider %s failed: %lu",
1605 provider_id, rv);
1606 goto fail;
1607 }
1608 p->slotinfo = xcalloc(p->nslots, sizeof(struct pkcs11_slotinfo));
1609 p->valid = 1;
1610 nkeys = 0;
1611 for (i = 0; i < p->nslots; i++) {
1612 token = &p->slotinfo[i].token;
1613 if ((rv = f->C_GetTokenInfo(p->slotlist[i], token))
1614 != CKR_OK) {
1615 error("C_GetTokenInfo for provider %s slot %lu "
1616 "failed: %lu", provider_id, (u_long)i, rv);
1617 continue;
1618 }
1619 if ((token->flags & CKF_TOKEN_INITIALIZED) == 0) {
1620 debug2_f("ignoring uninitialised token in "
1621 "provider %s slot %lu", provider_id, (u_long)i);
1622 continue;
1623 }
1624 debug("provider %s slot %lu: label <%.*s> "
1625 "manufacturerID <%.*s> model <%.*s> serial <%.*s> "
1626 "flags 0x%lx",
1627 provider_id, (unsigned long)i,
1628 RMSPACE(token->label), RMSPACE(token->manufacturerID),
1629 RMSPACE(token->model), RMSPACE(token->serialNumber),
1630 token->flags);
1631 /*
1632 * open session, login with pin and retrieve public
1633 * keys (if keyp is provided)
1634 */
1635 if ((ret = pkcs11_open_session(p, i, pin, user)) != 0 ||
1636 keyp == NULL)
1637 continue;
1638 pkcs11_fetch_keys(p, i, keyp, labelsp, &nkeys);
1639 pkcs11_fetch_certs(p, i, keyp, labelsp, &nkeys);
1640 if (nkeys == 0 && !p->slotinfo[i].logged_in &&
1641 pkcs11_interactive) {
1642 /*
1643 * Some tokens require login before they will
1644 * expose keys.
1645 */
1646 if (pkcs11_login_slot(p, &p->slotinfo[i],
1647 CKU_USER) < 0) {
1648 error("login failed");
1649 continue;
1650 }
1651 pkcs11_fetch_keys(p, i, keyp, labelsp, &nkeys);
1652 pkcs11_fetch_certs(p, i, keyp, labelsp, &nkeys);
1653 }
1654 }
1655
1656 /* now owned by caller */
1657 *providerp = p;
1658
1659 TAILQ_INSERT_TAIL(&pkcs11_providers, p, next);
1660 p->refcount++; /* add to provider list */
1661
1662 return (nkeys);
1663 fail:
1664 if (need_finalize && (rv = f->C_Finalize(NULL)) != CKR_OK)
1665 error("C_Finalize for provider %s failed: %lu",
1666 provider_id, rv);
1667 if (p) {
1668 free(p->name);
1669 free(p->slotlist);
1670 free(p->slotinfo);
1671 free(p);
1672 }
1673 if (handle)
1674 dlclose(handle);
1675 if (ret > 0)
1676 ret = -1;
1677 return (ret);
1678 }
1679
1680 /*
1681 * register a new provider and get number of keys hold by the token,
1682 * fails if provider already exists
1683 */
1684 int
pkcs11_add_provider(char * provider_id,char * pin,struct sshkey *** keyp,char *** labelsp)1685 pkcs11_add_provider(char *provider_id, char *pin, struct sshkey ***keyp,
1686 char ***labelsp)
1687 {
1688 struct pkcs11_provider *p = NULL;
1689 int nkeys;
1690
1691 nkeys = pkcs11_register_provider(provider_id, pin, keyp, labelsp,
1692 &p, CKU_USER);
1693
1694 /* no keys found or some other error, de-register provider */
1695 if (nkeys <= 0 && p != NULL) {
1696 TAILQ_REMOVE(&pkcs11_providers, p, next);
1697 pkcs11_provider_finalize(p);
1698 pkcs11_provider_unref(p);
1699 }
1700 if (nkeys == 0)
1701 debug_f("provider %s returned no keys", provider_id);
1702
1703 return (nkeys);
1704 }
1705
1706 #ifdef WITH_PKCS11_KEYGEN
1707 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)1708 pkcs11_gakp(char *provider_id, char *pin, unsigned int slotidx, char *label,
1709 unsigned int type, unsigned int bits, unsigned char keyid, u_int32_t *err)
1710 {
1711 struct pkcs11_provider *p = NULL;
1712 struct pkcs11_slotinfo *si;
1713 CK_FUNCTION_LIST *f;
1714 CK_SESSION_HANDLE session;
1715 struct sshkey *k = NULL;
1716 int ret = -1, reset_pin = 0, reset_provider = 0;
1717 CK_RV rv;
1718
1719 *err = 0;
1720
1721 if ((p = pkcs11_provider_lookup(provider_id)) != NULL)
1722 debug_f("provider \"%s\" available", provider_id);
1723 else if ((ret = pkcs11_register_provider(provider_id, pin, NULL, NULL,
1724 &p, CKU_SO)) < 0) {
1725 debug_f("could not register provider %s", provider_id);
1726 goto out;
1727 } else
1728 reset_provider = 1;
1729
1730 f = p->function_list;
1731 si = &p->slotinfo[slotidx];
1732 session = si->session;
1733
1734 if ((rv = f->C_SetOperationState(session , pin, strlen(pin),
1735 CK_INVALID_HANDLE, CK_INVALID_HANDLE)) != CKR_OK) {
1736 debug_f("could not supply SO pin: %lu", rv);
1737 reset_pin = 0;
1738 } else
1739 reset_pin = 1;
1740
1741 switch (type) {
1742 case KEY_RSA:
1743 if ((k = pkcs11_rsa_generate_private_key(p, slotidx, label,
1744 bits, keyid, err)) == NULL) {
1745 debug_f("failed to generate RSA key");
1746 goto out;
1747 }
1748 break;
1749 case KEY_ECDSA:
1750 if ((k = pkcs11_ecdsa_generate_private_key(p, slotidx, label,
1751 bits, keyid, err)) == NULL) {
1752 debug_f("failed to generate ECDSA key");
1753 goto out;
1754 }
1755 break;
1756 default:
1757 *err = SSH_PKCS11_ERR_GENERIC;
1758 debug_f("unknown type %d", type);
1759 goto out;
1760 }
1761
1762 out:
1763 if (reset_pin)
1764 f->C_SetOperationState(session , NULL, 0, CK_INVALID_HANDLE,
1765 CK_INVALID_HANDLE);
1766
1767 if (reset_provider)
1768 pkcs11_del_provider(provider_id);
1769
1770 return (k);
1771 }
1772
1773 struct sshkey *
pkcs11_destroy_keypair(char * provider_id,char * pin,unsigned long slotidx,unsigned char keyid,u_int32_t * err)1774 pkcs11_destroy_keypair(char *provider_id, char *pin, unsigned long slotidx,
1775 unsigned char keyid, u_int32_t *err)
1776 {
1777 struct pkcs11_provider *p = NULL;
1778 struct pkcs11_slotinfo *si;
1779 struct sshkey *k = NULL;
1780 int reset_pin = 0, reset_provider = 0;
1781 CK_ULONG nattrs;
1782 CK_FUNCTION_LIST *f;
1783 CK_SESSION_HANDLE session;
1784 CK_ATTRIBUTE attrs[16];
1785 CK_OBJECT_CLASS key_class;
1786 CK_KEY_TYPE key_type;
1787 CK_OBJECT_HANDLE obj = CK_INVALID_HANDLE;
1788 CK_RV rv;
1789
1790 *err = 0;
1791
1792 if ((p = pkcs11_provider_lookup(provider_id)) != NULL) {
1793 debug_f("using provider \"%s\"", provider_id);
1794 } else if (pkcs11_register_provider(provider_id, pin, NULL, NULL, &p,
1795 CKU_SO) < 0) {
1796 debug_f("could not register provider %s",
1797 provider_id);
1798 goto out;
1799 } else
1800 reset_provider = 1;
1801
1802 f = p->function_list;
1803 si = &p->slotinfo[slotidx];
1804 session = si->session;
1805
1806 if ((rv = f->C_SetOperationState(session , pin, strlen(pin),
1807 CK_INVALID_HANDLE, CK_INVALID_HANDLE)) != CKR_OK) {
1808 debug_f("could not supply SO pin: %lu", rv);
1809 reset_pin = 0;
1810 } else
1811 reset_pin = 1;
1812
1813 /* private key */
1814 nattrs = 0;
1815 key_class = CKO_PRIVATE_KEY;
1816 FILL_ATTR(attrs, nattrs, CKA_CLASS, &key_class, sizeof(key_class));
1817 FILL_ATTR(attrs, nattrs, CKA_ID, &keyid, sizeof(keyid));
1818
1819 if (pkcs11_find(p, slotidx, attrs, nattrs, &obj) == 0 &&
1820 obj != CK_INVALID_HANDLE) {
1821 if ((rv = f->C_DestroyObject(session, obj)) != CKR_OK) {
1822 debug_f("could not destroy private key 0x%hhx",
1823 keyid);
1824 *err = rv;
1825 goto out;
1826 }
1827 }
1828
1829 /* public key */
1830 nattrs = 0;
1831 key_class = CKO_PUBLIC_KEY;
1832 FILL_ATTR(attrs, nattrs, CKA_CLASS, &key_class, sizeof(key_class));
1833 FILL_ATTR(attrs, nattrs, CKA_ID, &keyid, sizeof(keyid));
1834
1835 if (pkcs11_find(p, slotidx, attrs, nattrs, &obj) == 0 &&
1836 obj != CK_INVALID_HANDLE) {
1837
1838 /* get key type */
1839 nattrs = 0;
1840 FILL_ATTR(attrs, nattrs, CKA_KEY_TYPE, &key_type,
1841 sizeof(key_type));
1842 rv = f->C_GetAttributeValue(session, obj, attrs, nattrs);
1843 if (rv != CKR_OK) {
1844 debug_f("could not get key type of public key 0x%hhx",
1845 keyid);
1846 *err = rv;
1847 key_type = -1;
1848 }
1849 if (key_type == CKK_RSA)
1850 k = pkcs11_fetch_rsa_pubkey(p, slotidx, &obj);
1851 else if (key_type == CKK_ECDSA)
1852 k = pkcs11_fetch_ecdsa_pubkey(p, slotidx, &obj);
1853
1854 if ((rv = f->C_DestroyObject(session, obj)) != CKR_OK) {
1855 debug_f("could not destroy public key 0x%hhx", keyid);
1856 *err = rv;
1857 goto out;
1858 }
1859 }
1860
1861 out:
1862 if (reset_pin)
1863 f->C_SetOperationState(session , NULL, 0, CK_INVALID_HANDLE,
1864 CK_INVALID_HANDLE);
1865
1866 if (reset_provider)
1867 pkcs11_del_provider(provider_id);
1868
1869 return (k);
1870 }
1871 #endif /* WITH_PKCS11_KEYGEN */
1872 #else /* ENABLE_PKCS11 */
1873
1874 #include <sys/types.h>
1875 #include <stdarg.h>
1876 #include <stdio.h>
1877
1878 #include "log.h"
1879 #include "sshkey.h"
1880
1881 int
pkcs11_init(int interactive)1882 pkcs11_init(int interactive)
1883 {
1884 error("%s: dlopen() not supported", __func__);
1885 return (-1);
1886 }
1887
1888 int
pkcs11_add_provider(char * provider_id,char * pin,struct sshkey *** keyp,char *** labelsp)1889 pkcs11_add_provider(char *provider_id, char *pin, struct sshkey ***keyp,
1890 char ***labelsp)
1891 {
1892 error("%s: dlopen() not supported", __func__);
1893 return (-1);
1894 }
1895
1896 void
pkcs11_terminate(void)1897 pkcs11_terminate(void)
1898 {
1899 error("%s: dlopen() not supported", __func__);
1900 }
1901 #endif /* ENABLE_PKCS11 */
1902