1 /* $OpenBSD: ssh-pkcs11.c,v 1.11 2013/11/13 13:48:20 markus Exp $ */ 2 /* 3 * Copyright (c) 2010 Markus Friedl. All rights reserved. 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #include <sys/types.h> 19 #include <sys/queue.h> 20 #include <stdarg.h> 21 #include <stdio.h> 22 23 #include <string.h> 24 #include <dlfcn.h> 25 26 #include <openssl/x509.h> 27 28 #define CRYPTOKI_COMPAT 29 #include "pkcs11.h" 30 31 #include "log.h" 32 #include "misc.h" 33 #include "key.h" 34 #include "ssh-pkcs11.h" 35 #include "xmalloc.h" 36 37 struct pkcs11_slotinfo { 38 CK_TOKEN_INFO token; 39 CK_SESSION_HANDLE session; 40 int logged_in; 41 }; 42 43 struct pkcs11_provider { 44 char *name; 45 void *handle; 46 CK_FUNCTION_LIST *function_list; 47 CK_INFO info; 48 CK_ULONG nslots; 49 CK_SLOT_ID *slotlist; 50 struct pkcs11_slotinfo *slotinfo; 51 int valid; 52 int refcount; 53 TAILQ_ENTRY(pkcs11_provider) next; 54 }; 55 56 TAILQ_HEAD(, pkcs11_provider) pkcs11_providers; 57 58 struct pkcs11_key { 59 struct pkcs11_provider *provider; 60 CK_ULONG slotidx; 61 int (*orig_finish)(RSA *rsa); 62 RSA_METHOD rsa_method; 63 char *keyid; 64 int keyid_len; 65 }; 66 67 int pkcs11_interactive = 0; 68 69 int 70 pkcs11_init(int interactive) 71 { 72 pkcs11_interactive = interactive; 73 TAILQ_INIT(&pkcs11_providers); 74 return (0); 75 } 76 77 /* 78 * finalize a provider shared libarary, it's no longer usable. 79 * however, there might still be keys referencing this provider, 80 * so the actuall freeing of memory is handled by pkcs11_provider_unref(). 81 * this is called when a provider gets unregistered. 82 */ 83 static void 84 pkcs11_provider_finalize(struct pkcs11_provider *p) 85 { 86 CK_RV rv; 87 CK_ULONG i; 88 89 debug("pkcs11_provider_finalize: %p refcount %d valid %d", 90 p, p->refcount, p->valid); 91 if (!p->valid) 92 return; 93 for (i = 0; i < p->nslots; i++) { 94 if (p->slotinfo[i].session && 95 (rv = p->function_list->C_CloseSession( 96 p->slotinfo[i].session)) != CKR_OK) 97 error("C_CloseSession failed: %lu", rv); 98 } 99 if ((rv = p->function_list->C_Finalize(NULL)) != CKR_OK) 100 error("C_Finalize failed: %lu", rv); 101 p->valid = 0; 102 p->function_list = NULL; 103 #ifdef HAVE_DLOPEN 104 dlclose(p->handle); 105 #endif 106 } 107 108 /* 109 * remove a reference to the provider. 110 * called when a key gets destroyed or when the provider is unregistered. 111 */ 112 static void 113 pkcs11_provider_unref(struct pkcs11_provider *p) 114 { 115 debug("pkcs11_provider_unref: %p refcount %d", p, p->refcount); 116 if (--p->refcount <= 0) { 117 if (p->valid) 118 error("pkcs11_provider_unref: %p still valid", p); 119 free(p->slotlist); 120 free(p->slotinfo); 121 free(p); 122 } 123 } 124 125 /* unregister all providers, keys might still point to the providers */ 126 void 127 pkcs11_terminate(void) 128 { 129 struct pkcs11_provider *p; 130 131 while ((p = TAILQ_FIRST(&pkcs11_providers)) != NULL) { 132 TAILQ_REMOVE(&pkcs11_providers, p, next); 133 pkcs11_provider_finalize(p); 134 pkcs11_provider_unref(p); 135 } 136 } 137 138 /* lookup provider by name */ 139 static struct pkcs11_provider * 140 pkcs11_provider_lookup(char *provider_id) 141 { 142 struct pkcs11_provider *p; 143 144 TAILQ_FOREACH(p, &pkcs11_providers, next) { 145 debug("check %p %s", p, p->name); 146 if (!strcmp(provider_id, p->name)) 147 return (p); 148 } 149 return (NULL); 150 } 151 152 /* unregister provider by name */ 153 int 154 pkcs11_del_provider(char *provider_id) 155 { 156 struct pkcs11_provider *p; 157 158 if ((p = pkcs11_provider_lookup(provider_id)) != NULL) { 159 TAILQ_REMOVE(&pkcs11_providers, p, next); 160 pkcs11_provider_finalize(p); 161 pkcs11_provider_unref(p); 162 return (0); 163 } 164 return (-1); 165 } 166 167 /* openssl callback for freeing an RSA key */ 168 static int 169 pkcs11_rsa_finish(RSA *rsa) 170 { 171 struct pkcs11_key *k11; 172 int rv = -1; 173 174 if ((k11 = RSA_get_app_data(rsa)) != NULL) { 175 if (k11->orig_finish) 176 rv = k11->orig_finish(rsa); 177 if (k11->provider) 178 pkcs11_provider_unref(k11->provider); 179 free(k11->keyid); 180 free(k11); 181 } 182 return (rv); 183 } 184 185 /* find a single 'obj' for given attributes */ 186 static int 187 pkcs11_find(struct pkcs11_provider *p, CK_ULONG slotidx, CK_ATTRIBUTE *attr, 188 CK_ULONG nattr, CK_OBJECT_HANDLE *obj) 189 { 190 CK_FUNCTION_LIST *f; 191 CK_SESSION_HANDLE session; 192 CK_ULONG nfound = 0; 193 CK_RV rv; 194 int ret = -1; 195 196 f = p->function_list; 197 session = p->slotinfo[slotidx].session; 198 if ((rv = f->C_FindObjectsInit(session, attr, nattr)) != CKR_OK) { 199 error("C_FindObjectsInit failed (nattr %lu): %lu", nattr, rv); 200 return (-1); 201 } 202 if ((rv = f->C_FindObjects(session, obj, 1, &nfound)) != CKR_OK || 203 nfound != 1) { 204 debug("C_FindObjects failed (nfound %lu nattr %lu): %lu", 205 nfound, nattr, rv); 206 } else 207 ret = 0; 208 if ((rv = f->C_FindObjectsFinal(session)) != CKR_OK) 209 error("C_FindObjectsFinal failed: %lu", rv); 210 return (ret); 211 } 212 213 /* openssl callback doing the actual signing operation */ 214 static int 215 pkcs11_rsa_private_encrypt(int flen, const u_char *from, u_char *to, RSA *rsa, 216 int padding) 217 { 218 struct pkcs11_key *k11; 219 struct pkcs11_slotinfo *si; 220 CK_FUNCTION_LIST *f; 221 CK_OBJECT_HANDLE obj; 222 CK_ULONG tlen = 0; 223 CK_RV rv; 224 CK_OBJECT_CLASS private_key_class = CKO_PRIVATE_KEY; 225 CK_BBOOL true_val = CK_TRUE; 226 CK_MECHANISM mech = { 227 CKM_RSA_PKCS, NULL_PTR, 0 228 }; 229 CK_ATTRIBUTE key_filter[] = { 230 {CKA_CLASS, &private_key_class, sizeof(private_key_class) }, 231 {CKA_ID, NULL, 0}, 232 {CKA_SIGN, &true_val, sizeof(true_val) } 233 }; 234 char *pin, prompt[1024]; 235 int rval = -1; 236 237 if ((k11 = RSA_get_app_data(rsa)) == NULL) { 238 error("RSA_get_app_data failed for rsa %p", rsa); 239 return (-1); 240 } 241 if (!k11->provider || !k11->provider->valid) { 242 error("no pkcs11 (valid) provider for rsa %p", rsa); 243 return (-1); 244 } 245 f = k11->provider->function_list; 246 si = &k11->provider->slotinfo[k11->slotidx]; 247 if ((si->token.flags & CKF_LOGIN_REQUIRED) && !si->logged_in) { 248 if (!pkcs11_interactive) { 249 error("need pin"); 250 return (-1); 251 } 252 snprintf(prompt, sizeof(prompt), "Enter PIN for '%s': ", 253 si->token.label); 254 pin = read_passphrase(prompt, RP_ALLOW_EOF); 255 if (pin == NULL) 256 return (-1); /* bail out */ 257 if ((rv = f->C_Login(si->session, CKU_USER, 258 (u_char *)pin, strlen(pin))) != CKR_OK) { 259 free(pin); 260 error("C_Login failed: %lu", rv); 261 return (-1); 262 } 263 free(pin); 264 si->logged_in = 1; 265 } 266 key_filter[1].pValue = k11->keyid; 267 key_filter[1].ulValueLen = k11->keyid_len; 268 /* try to find object w/CKA_SIGN first, retry w/o */ 269 if (pkcs11_find(k11->provider, k11->slotidx, key_filter, 3, &obj) < 0 && 270 pkcs11_find(k11->provider, k11->slotidx, key_filter, 2, &obj) < 0) { 271 error("cannot find private key"); 272 } else if ((rv = f->C_SignInit(si->session, &mech, obj)) != CKR_OK) { 273 error("C_SignInit failed: %lu", rv); 274 } else { 275 /* XXX handle CKR_BUFFER_TOO_SMALL */ 276 tlen = RSA_size(rsa); 277 rv = f->C_Sign(si->session, (CK_BYTE *)from, flen, to, &tlen); 278 if (rv == CKR_OK) 279 rval = tlen; 280 else 281 error("C_Sign failed: %lu", rv); 282 } 283 return (rval); 284 } 285 286 static int 287 pkcs11_rsa_private_decrypt(int flen, const u_char *from, u_char *to, RSA *rsa, 288 int padding) 289 { 290 return (-1); 291 } 292 293 /* redirect private key operations for rsa key to pkcs11 token */ 294 static int 295 pkcs11_rsa_wrap(struct pkcs11_provider *provider, CK_ULONG slotidx, 296 CK_ATTRIBUTE *keyid_attrib, RSA *rsa) 297 { 298 struct pkcs11_key *k11; 299 const RSA_METHOD *def = RSA_get_default_method(); 300 301 k11 = xcalloc(1, sizeof(*k11)); 302 k11->provider = provider; 303 provider->refcount++; /* provider referenced by RSA key */ 304 k11->slotidx = slotidx; 305 /* identify key object on smartcard */ 306 k11->keyid_len = keyid_attrib->ulValueLen; 307 k11->keyid = xmalloc(k11->keyid_len); 308 memcpy(k11->keyid, keyid_attrib->pValue, k11->keyid_len); 309 k11->orig_finish = def->finish; 310 memcpy(&k11->rsa_method, def, sizeof(k11->rsa_method)); 311 k11->rsa_method.name = "pkcs11"; 312 k11->rsa_method.rsa_priv_enc = pkcs11_rsa_private_encrypt; 313 k11->rsa_method.rsa_priv_dec = pkcs11_rsa_private_decrypt; 314 k11->rsa_method.finish = pkcs11_rsa_finish; 315 RSA_set_method(rsa, &k11->rsa_method); 316 RSA_set_app_data(rsa, k11); 317 return (0); 318 } 319 320 /* remove trailing spaces */ 321 static void 322 rmspace(u_char *buf, size_t len) 323 { 324 size_t i; 325 326 if (!len) 327 return; 328 for (i = len - 1; i > 0; i--) 329 if (i == len - 1 || buf[i] == ' ') 330 buf[i] = '\0'; 331 else 332 break; 333 } 334 335 /* 336 * open a pkcs11 session and login if required. 337 * if pin == NULL we delay login until key use 338 */ 339 static int 340 pkcs11_open_session(struct pkcs11_provider *p, CK_ULONG slotidx, char *pin) 341 { 342 CK_RV rv; 343 CK_FUNCTION_LIST *f; 344 CK_SESSION_HANDLE session; 345 int login_required; 346 347 f = p->function_list; 348 login_required = p->slotinfo[slotidx].token.flags & CKF_LOGIN_REQUIRED; 349 if (pin && login_required && !strlen(pin)) { 350 error("pin required"); 351 return (-1); 352 } 353 if ((rv = f->C_OpenSession(p->slotlist[slotidx], CKF_RW_SESSION| 354 CKF_SERIAL_SESSION, NULL, NULL, &session)) 355 != CKR_OK) { 356 error("C_OpenSession failed: %lu", rv); 357 return (-1); 358 } 359 if (login_required && pin) { 360 if ((rv = f->C_Login(session, CKU_USER, 361 (u_char *)pin, strlen(pin))) != CKR_OK) { 362 error("C_Login failed: %lu", rv); 363 if ((rv = f->C_CloseSession(session)) != CKR_OK) 364 error("C_CloseSession failed: %lu", rv); 365 return (-1); 366 } 367 p->slotinfo[slotidx].logged_in = 1; 368 } 369 p->slotinfo[slotidx].session = session; 370 return (0); 371 } 372 373 /* 374 * lookup public keys for token in slot identified by slotidx, 375 * add 'wrapped' public keys to the 'keysp' array and increment nkeys. 376 * keysp points to an (possibly empty) array with *nkeys keys. 377 */ 378 static int pkcs11_fetch_keys_filter(struct pkcs11_provider *, CK_ULONG, 379 CK_ATTRIBUTE [], CK_ATTRIBUTE [3], Key ***, int *) 380 __attribute__((__bounded__(__minbytes__,4, 3 * sizeof(CK_ATTRIBUTE)))); 381 382 static int 383 pkcs11_fetch_keys(struct pkcs11_provider *p, CK_ULONG slotidx, 384 Key ***keysp, int *nkeys) 385 { 386 CK_OBJECT_CLASS pubkey_class = CKO_PUBLIC_KEY; 387 CK_OBJECT_CLASS cert_class = CKO_CERTIFICATE; 388 CK_ATTRIBUTE pubkey_filter[] = { 389 { CKA_CLASS, &pubkey_class, sizeof(pubkey_class) } 390 }; 391 CK_ATTRIBUTE cert_filter[] = { 392 { CKA_CLASS, &cert_class, sizeof(cert_class) } 393 }; 394 CK_ATTRIBUTE pubkey_attribs[] = { 395 { CKA_ID, NULL, 0 }, 396 { CKA_MODULUS, NULL, 0 }, 397 { CKA_PUBLIC_EXPONENT, NULL, 0 } 398 }; 399 CK_ATTRIBUTE cert_attribs[] = { 400 { CKA_ID, NULL, 0 }, 401 { CKA_SUBJECT, NULL, 0 }, 402 { CKA_VALUE, NULL, 0 } 403 }; 404 405 if (pkcs11_fetch_keys_filter(p, slotidx, pubkey_filter, pubkey_attribs, 406 keysp, nkeys) < 0 || 407 pkcs11_fetch_keys_filter(p, slotidx, cert_filter, cert_attribs, 408 keysp, nkeys) < 0) 409 return (-1); 410 return (0); 411 } 412 413 static int 414 pkcs11_key_included(Key ***keysp, int *nkeys, Key *key) 415 { 416 int i; 417 418 for (i = 0; i < *nkeys; i++) 419 if (key_equal(key, (*keysp)[i])) 420 return (1); 421 return (0); 422 } 423 424 static int 425 pkcs11_fetch_keys_filter(struct pkcs11_provider *p, CK_ULONG slotidx, 426 CK_ATTRIBUTE filter[], CK_ATTRIBUTE attribs[3], 427 Key ***keysp, int *nkeys) 428 { 429 Key *key; 430 RSA *rsa; 431 X509 *x509; 432 EVP_PKEY *evp; 433 int i; 434 const u_char *cp; 435 CK_RV rv; 436 CK_OBJECT_HANDLE obj; 437 CK_ULONG nfound; 438 CK_SESSION_HANDLE session; 439 CK_FUNCTION_LIST *f; 440 441 f = p->function_list; 442 session = p->slotinfo[slotidx].session; 443 /* setup a filter the looks for public keys */ 444 if ((rv = f->C_FindObjectsInit(session, filter, 1)) != CKR_OK) { 445 error("C_FindObjectsInit failed: %lu", rv); 446 return (-1); 447 } 448 while (1) { 449 /* XXX 3 attributes in attribs[] */ 450 for (i = 0; i < 3; i++) { 451 attribs[i].pValue = NULL; 452 attribs[i].ulValueLen = 0; 453 } 454 if ((rv = f->C_FindObjects(session, &obj, 1, &nfound)) != CKR_OK 455 || nfound == 0) 456 break; 457 /* found a key, so figure out size of the attributes */ 458 if ((rv = f->C_GetAttributeValue(session, obj, attribs, 3)) 459 != CKR_OK) { 460 error("C_GetAttributeValue failed: %lu", rv); 461 continue; 462 } 463 /* check that none of the attributes are zero length */ 464 if (attribs[0].ulValueLen == 0 || 465 attribs[1].ulValueLen == 0 || 466 attribs[2].ulValueLen == 0) { 467 continue; 468 } 469 /* allocate buffers for attributes */ 470 for (i = 0; i < 3; i++) 471 attribs[i].pValue = xmalloc(attribs[i].ulValueLen); 472 /* 473 * retrieve ID, modulus and public exponent of RSA key, 474 * or ID, subject and value for certificates. 475 */ 476 rsa = NULL; 477 if ((rv = f->C_GetAttributeValue(session, obj, attribs, 3)) 478 != CKR_OK) { 479 error("C_GetAttributeValue failed: %lu", rv); 480 } else if (attribs[1].type == CKA_MODULUS ) { 481 if ((rsa = RSA_new()) == NULL) { 482 error("RSA_new failed"); 483 } else { 484 rsa->n = BN_bin2bn(attribs[1].pValue, 485 attribs[1].ulValueLen, NULL); 486 rsa->e = BN_bin2bn(attribs[2].pValue, 487 attribs[2].ulValueLen, NULL); 488 } 489 } else { 490 cp = attribs[2].pValue; 491 if ((x509 = X509_new()) == NULL) { 492 error("X509_new failed"); 493 } else if (d2i_X509(&x509, &cp, attribs[2].ulValueLen) 494 == NULL) { 495 error("d2i_X509 failed"); 496 } else if ((evp = X509_get_pubkey(x509)) == NULL || 497 evp->type != EVP_PKEY_RSA || 498 evp->pkey.rsa == NULL) { 499 debug("X509_get_pubkey failed or no rsa"); 500 } else if ((rsa = RSAPublicKey_dup(evp->pkey.rsa)) 501 == NULL) { 502 error("RSAPublicKey_dup"); 503 } 504 if (x509) 505 X509_free(x509); 506 } 507 if (rsa && rsa->n && rsa->e && 508 pkcs11_rsa_wrap(p, slotidx, &attribs[0], rsa) == 0) { 509 key = key_new(KEY_UNSPEC); 510 key->rsa = rsa; 511 key->type = KEY_RSA; 512 key->flags |= KEY_FLAG_EXT; 513 if (pkcs11_key_included(keysp, nkeys, key)) { 514 key_free(key); 515 } else { 516 /* expand key array and add key */ 517 *keysp = xrealloc(*keysp, *nkeys + 1, 518 sizeof(Key *)); 519 (*keysp)[*nkeys] = key; 520 *nkeys = *nkeys + 1; 521 debug("have %d keys", *nkeys); 522 } 523 } else if (rsa) { 524 RSA_free(rsa); 525 } 526 for (i = 0; i < 3; i++) 527 free(attribs[i].pValue); 528 } 529 if ((rv = f->C_FindObjectsFinal(session)) != CKR_OK) 530 error("C_FindObjectsFinal failed: %lu", rv); 531 return (0); 532 } 533 534 #ifdef HAVE_DLOPEN 535 /* register a new provider, fails if provider already exists */ 536 int 537 pkcs11_add_provider(char *provider_id, char *pin, Key ***keyp) 538 { 539 int nkeys, need_finalize = 0; 540 struct pkcs11_provider *p = NULL; 541 void *handle = NULL; 542 CK_RV (*getfunctionlist)(CK_FUNCTION_LIST **); 543 CK_RV rv; 544 CK_FUNCTION_LIST *f = NULL; 545 CK_TOKEN_INFO *token; 546 CK_ULONG i; 547 548 *keyp = NULL; 549 if (pkcs11_provider_lookup(provider_id) != NULL) { 550 error("provider already registered: %s", provider_id); 551 goto fail; 552 } 553 /* open shared pkcs11-libarary */ 554 if ((handle = dlopen(provider_id, RTLD_NOW)) == NULL) { 555 error("dlopen %s failed: %s", provider_id, dlerror()); 556 goto fail; 557 } 558 if ((getfunctionlist = dlsym(handle, "C_GetFunctionList")) == NULL) { 559 error("dlsym(C_GetFunctionList) failed: %s", dlerror()); 560 goto fail; 561 } 562 p = xcalloc(1, sizeof(*p)); 563 p->name = xstrdup(provider_id); 564 p->handle = handle; 565 /* setup the pkcs11 callbacks */ 566 if ((rv = (*getfunctionlist)(&f)) != CKR_OK) { 567 error("C_GetFunctionList failed: %lu", rv); 568 goto fail; 569 } 570 p->function_list = f; 571 if ((rv = f->C_Initialize(NULL)) != CKR_OK) { 572 error("C_Initialize failed: %lu", rv); 573 goto fail; 574 } 575 need_finalize = 1; 576 if ((rv = f->C_GetInfo(&p->info)) != CKR_OK) { 577 error("C_GetInfo failed: %lu", rv); 578 goto fail; 579 } 580 rmspace(p->info.manufacturerID, sizeof(p->info.manufacturerID)); 581 rmspace(p->info.libraryDescription, sizeof(p->info.libraryDescription)); 582 debug("manufacturerID <%s> cryptokiVersion %d.%d" 583 " libraryDescription <%s> libraryVersion %d.%d", 584 p->info.manufacturerID, 585 p->info.cryptokiVersion.major, 586 p->info.cryptokiVersion.minor, 587 p->info.libraryDescription, 588 p->info.libraryVersion.major, 589 p->info.libraryVersion.minor); 590 if ((rv = f->C_GetSlotList(CK_TRUE, NULL, &p->nslots)) != CKR_OK) { 591 error("C_GetSlotList failed: %lu", rv); 592 goto fail; 593 } 594 if (p->nslots == 0) { 595 error("no slots"); 596 goto fail; 597 } 598 p->slotlist = xcalloc(p->nslots, sizeof(CK_SLOT_ID)); 599 if ((rv = f->C_GetSlotList(CK_TRUE, p->slotlist, &p->nslots)) 600 != CKR_OK) { 601 error("C_GetSlotList failed: %lu", rv); 602 goto fail; 603 } 604 p->slotinfo = xcalloc(p->nslots, sizeof(struct pkcs11_slotinfo)); 605 p->valid = 1; 606 nkeys = 0; 607 for (i = 0; i < p->nslots; i++) { 608 token = &p->slotinfo[i].token; 609 if ((rv = f->C_GetTokenInfo(p->slotlist[i], token)) 610 != CKR_OK) { 611 error("C_GetTokenInfo failed: %lu", rv); 612 continue; 613 } 614 rmspace(token->label, sizeof(token->label)); 615 rmspace(token->manufacturerID, sizeof(token->manufacturerID)); 616 rmspace(token->model, sizeof(token->model)); 617 rmspace(token->serialNumber, sizeof(token->serialNumber)); 618 debug("label <%s> manufacturerID <%s> model <%s> serial <%s>" 619 " flags 0x%lx", 620 token->label, token->manufacturerID, token->model, 621 token->serialNumber, token->flags); 622 /* open session, login with pin and retrieve public keys */ 623 if (pkcs11_open_session(p, i, pin) == 0) 624 pkcs11_fetch_keys(p, i, keyp, &nkeys); 625 } 626 if (nkeys > 0) { 627 TAILQ_INSERT_TAIL(&pkcs11_providers, p, next); 628 p->refcount++; /* add to provider list */ 629 return (nkeys); 630 } 631 error("no keys"); 632 /* don't add the provider, since it does not have any keys */ 633 fail: 634 if (need_finalize && (rv = f->C_Finalize(NULL)) != CKR_OK) 635 error("C_Finalize failed: %lu", rv); 636 if (p) { 637 free(p->slotlist); 638 free(p->slotinfo); 639 free(p); 640 } 641 if (handle) 642 dlclose(handle); 643 return (-1); 644 } 645 #else 646 int 647 pkcs11_add_provider(char *provider_id, char *pin, Key ***keyp) 648 { 649 error("dlopen() not supported"); 650 return (-1); 651 } 652 #endif 653