1 /* $OpenBSD: ssh-pkcs11.c,v 1.25 2017/05/31 09:15:42 deraadt 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 "sshkey.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 = NULL, 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 entry%s", (si->token.flags & 250 CKF_PROTECTED_AUTHENTICATION_PATH) ? 251 " on reader keypad" : ""); 252 return (-1); 253 } 254 if (si->token.flags & CKF_PROTECTED_AUTHENTICATION_PATH) 255 verbose("Deferring PIN entry to reader keypad."); 256 else { 257 snprintf(prompt, sizeof(prompt), 258 "Enter PIN for '%s': ", si->token.label); 259 pin = read_passphrase(prompt, RP_ALLOW_EOF); 260 if (pin == NULL) 261 return (-1); /* bail out */ 262 } 263 rv = f->C_Login(si->session, CKU_USER, (u_char *)pin, 264 (pin != NULL) ? strlen(pin) : 0); 265 if (pin != NULL) { 266 explicit_bzero(pin, strlen(pin)); 267 free(pin); 268 } 269 if (rv != CKR_OK && rv != CKR_USER_ALREADY_LOGGED_IN) { 270 error("C_Login failed: %lu", rv); 271 return (-1); 272 } 273 si->logged_in = 1; 274 } 275 key_filter[1].pValue = k11->keyid; 276 key_filter[1].ulValueLen = k11->keyid_len; 277 /* try to find object w/CKA_SIGN first, retry w/o */ 278 if (pkcs11_find(k11->provider, k11->slotidx, key_filter, 3, &obj) < 0 && 279 pkcs11_find(k11->provider, k11->slotidx, key_filter, 2, &obj) < 0) { 280 error("cannot find private key"); 281 } else if ((rv = f->C_SignInit(si->session, &mech, obj)) != CKR_OK) { 282 error("C_SignInit failed: %lu", rv); 283 } else { 284 /* XXX handle CKR_BUFFER_TOO_SMALL */ 285 tlen = RSA_size(rsa); 286 rv = f->C_Sign(si->session, (CK_BYTE *)from, flen, to, &tlen); 287 if (rv == CKR_OK) 288 rval = tlen; 289 else 290 error("C_Sign failed: %lu", rv); 291 } 292 return (rval); 293 } 294 295 static int 296 pkcs11_rsa_private_decrypt(int flen, const u_char *from, u_char *to, RSA *rsa, 297 int padding) 298 { 299 return (-1); 300 } 301 302 /* redirect private key operations for rsa key to pkcs11 token */ 303 static int 304 pkcs11_rsa_wrap(struct pkcs11_provider *provider, CK_ULONG slotidx, 305 CK_ATTRIBUTE *keyid_attrib, RSA *rsa) 306 { 307 struct pkcs11_key *k11; 308 const RSA_METHOD *def = RSA_get_default_method(); 309 310 k11 = xcalloc(1, sizeof(*k11)); 311 k11->provider = provider; 312 provider->refcount++; /* provider referenced by RSA key */ 313 k11->slotidx = slotidx; 314 /* identify key object on smartcard */ 315 k11->keyid_len = keyid_attrib->ulValueLen; 316 if (k11->keyid_len > 0) { 317 k11->keyid = xmalloc(k11->keyid_len); 318 memcpy(k11->keyid, keyid_attrib->pValue, k11->keyid_len); 319 } 320 k11->orig_finish = def->finish; 321 memcpy(&k11->rsa_method, def, sizeof(k11->rsa_method)); 322 k11->rsa_method.name = "pkcs11"; 323 k11->rsa_method.rsa_priv_enc = pkcs11_rsa_private_encrypt; 324 k11->rsa_method.rsa_priv_dec = pkcs11_rsa_private_decrypt; 325 k11->rsa_method.finish = pkcs11_rsa_finish; 326 RSA_set_method(rsa, &k11->rsa_method); 327 RSA_set_app_data(rsa, k11); 328 return (0); 329 } 330 331 /* remove trailing spaces */ 332 static void 333 rmspace(u_char *buf, size_t len) 334 { 335 size_t i; 336 337 if (!len) 338 return; 339 for (i = len - 1; i > 0; i--) 340 if (i == len - 1 || buf[i] == ' ') 341 buf[i] = '\0'; 342 else 343 break; 344 } 345 346 /* 347 * open a pkcs11 session and login if required. 348 * if pin == NULL we delay login until key use 349 */ 350 static int 351 pkcs11_open_session(struct pkcs11_provider *p, CK_ULONG slotidx, char *pin) 352 { 353 CK_RV rv; 354 CK_FUNCTION_LIST *f; 355 CK_SESSION_HANDLE session; 356 int login_required; 357 358 f = p->function_list; 359 login_required = p->slotinfo[slotidx].token.flags & CKF_LOGIN_REQUIRED; 360 if (pin && login_required && !strlen(pin)) { 361 error("pin required"); 362 return (-1); 363 } 364 if ((rv = f->C_OpenSession(p->slotlist[slotidx], CKF_RW_SESSION| 365 CKF_SERIAL_SESSION, NULL, NULL, &session)) 366 != CKR_OK) { 367 error("C_OpenSession failed: %lu", rv); 368 return (-1); 369 } 370 if (login_required && pin) { 371 rv = f->C_Login(session, CKU_USER, 372 (u_char *)pin, strlen(pin)); 373 if (rv != CKR_OK && rv != CKR_USER_ALREADY_LOGGED_IN) { 374 error("C_Login failed: %lu", rv); 375 if ((rv = f->C_CloseSession(session)) != CKR_OK) 376 error("C_CloseSession failed: %lu", rv); 377 return (-1); 378 } 379 p->slotinfo[slotidx].logged_in = 1; 380 } 381 p->slotinfo[slotidx].session = session; 382 return (0); 383 } 384 385 /* 386 * lookup public keys for token in slot identified by slotidx, 387 * add 'wrapped' public keys to the 'keysp' array and increment nkeys. 388 * keysp points to an (possibly empty) array with *nkeys keys. 389 */ 390 static int pkcs11_fetch_keys_filter(struct pkcs11_provider *, CK_ULONG, 391 CK_ATTRIBUTE [], CK_ATTRIBUTE [3], struct sshkey ***, int *) 392 __attribute__((__bounded__(__minbytes__,4, 3 * sizeof(CK_ATTRIBUTE)))); 393 394 static int 395 pkcs11_fetch_keys(struct pkcs11_provider *p, CK_ULONG slotidx, 396 struct sshkey ***keysp, int *nkeys) 397 { 398 CK_OBJECT_CLASS pubkey_class = CKO_PUBLIC_KEY; 399 CK_OBJECT_CLASS cert_class = CKO_CERTIFICATE; 400 CK_ATTRIBUTE pubkey_filter[] = { 401 { CKA_CLASS, &pubkey_class, sizeof(pubkey_class) } 402 }; 403 CK_ATTRIBUTE cert_filter[] = { 404 { CKA_CLASS, &cert_class, sizeof(cert_class) } 405 }; 406 CK_ATTRIBUTE pubkey_attribs[] = { 407 { CKA_ID, NULL, 0 }, 408 { CKA_MODULUS, NULL, 0 }, 409 { CKA_PUBLIC_EXPONENT, NULL, 0 } 410 }; 411 CK_ATTRIBUTE cert_attribs[] = { 412 { CKA_ID, NULL, 0 }, 413 { CKA_SUBJECT, NULL, 0 }, 414 { CKA_VALUE, NULL, 0 } 415 }; 416 417 if (pkcs11_fetch_keys_filter(p, slotidx, pubkey_filter, pubkey_attribs, 418 keysp, nkeys) < 0 || 419 pkcs11_fetch_keys_filter(p, slotidx, cert_filter, cert_attribs, 420 keysp, nkeys) < 0) 421 return (-1); 422 return (0); 423 } 424 425 static int 426 pkcs11_key_included(struct sshkey ***keysp, int *nkeys, struct sshkey *key) 427 { 428 int i; 429 430 for (i = 0; i < *nkeys; i++) 431 if (sshkey_equal(key, (*keysp)[i])) 432 return (1); 433 return (0); 434 } 435 436 static int 437 pkcs11_fetch_keys_filter(struct pkcs11_provider *p, CK_ULONG slotidx, 438 CK_ATTRIBUTE filter[], CK_ATTRIBUTE attribs[3], 439 struct sshkey ***keysp, int *nkeys) 440 { 441 struct sshkey *key; 442 RSA *rsa; 443 X509 *x509; 444 EVP_PKEY *evp; 445 int i; 446 const u_char *cp; 447 CK_RV rv; 448 CK_OBJECT_HANDLE obj; 449 CK_ULONG nfound; 450 CK_SESSION_HANDLE session; 451 CK_FUNCTION_LIST *f; 452 453 f = p->function_list; 454 session = p->slotinfo[slotidx].session; 455 /* setup a filter the looks for public keys */ 456 if ((rv = f->C_FindObjectsInit(session, filter, 1)) != CKR_OK) { 457 error("C_FindObjectsInit failed: %lu", rv); 458 return (-1); 459 } 460 while (1) { 461 /* XXX 3 attributes in attribs[] */ 462 for (i = 0; i < 3; i++) { 463 attribs[i].pValue = NULL; 464 attribs[i].ulValueLen = 0; 465 } 466 if ((rv = f->C_FindObjects(session, &obj, 1, &nfound)) != CKR_OK 467 || nfound == 0) 468 break; 469 /* found a key, so figure out size of the attributes */ 470 if ((rv = f->C_GetAttributeValue(session, obj, attribs, 3)) 471 != CKR_OK) { 472 error("C_GetAttributeValue failed: %lu", rv); 473 continue; 474 } 475 /* 476 * Allow CKA_ID (always first attribute) to be empty, but 477 * ensure that none of the others are zero length. 478 * XXX assumes CKA_ID is always first. 479 */ 480 if (attribs[1].ulValueLen == 0 || 481 attribs[2].ulValueLen == 0) { 482 continue; 483 } 484 /* allocate buffers for attributes */ 485 for (i = 0; i < 3; i++) { 486 if (attribs[i].ulValueLen > 0) { 487 attribs[i].pValue = xmalloc( 488 attribs[i].ulValueLen); 489 } 490 } 491 492 /* 493 * retrieve ID, modulus and public exponent of RSA key, 494 * or ID, subject and value for certificates. 495 */ 496 rsa = NULL; 497 if ((rv = f->C_GetAttributeValue(session, obj, attribs, 3)) 498 != CKR_OK) { 499 error("C_GetAttributeValue failed: %lu", rv); 500 } else if (attribs[1].type == CKA_MODULUS ) { 501 if ((rsa = RSA_new()) == NULL) { 502 error("RSA_new failed"); 503 } else { 504 rsa->n = BN_bin2bn(attribs[1].pValue, 505 attribs[1].ulValueLen, NULL); 506 rsa->e = BN_bin2bn(attribs[2].pValue, 507 attribs[2].ulValueLen, NULL); 508 } 509 } else { 510 cp = attribs[2].pValue; 511 if ((x509 = X509_new()) == NULL) { 512 error("X509_new failed"); 513 } else if (d2i_X509(&x509, &cp, attribs[2].ulValueLen) 514 == NULL) { 515 error("d2i_X509 failed"); 516 } else if ((evp = X509_get_pubkey(x509)) == NULL || 517 evp->type != EVP_PKEY_RSA || 518 evp->pkey.rsa == NULL) { 519 debug("X509_get_pubkey failed or no rsa"); 520 } else if ((rsa = RSAPublicKey_dup(evp->pkey.rsa)) 521 == NULL) { 522 error("RSAPublicKey_dup"); 523 } 524 if (x509) 525 X509_free(x509); 526 } 527 if (rsa && rsa->n && rsa->e && 528 pkcs11_rsa_wrap(p, slotidx, &attribs[0], rsa) == 0) { 529 if ((key = sshkey_new(KEY_UNSPEC)) == NULL) 530 fatal("sshkey_new failed"); 531 key->rsa = rsa; 532 key->type = KEY_RSA; 533 key->flags |= SSHKEY_FLAG_EXT; 534 if (pkcs11_key_included(keysp, nkeys, key)) { 535 sshkey_free(key); 536 } else { 537 /* expand key array and add key */ 538 *keysp = xrecallocarray(*keysp, *nkeys, 539 *nkeys + 1, sizeof(struct sshkey *)); 540 (*keysp)[*nkeys] = key; 541 *nkeys = *nkeys + 1; 542 debug("have %d keys", *nkeys); 543 } 544 } else if (rsa) { 545 RSA_free(rsa); 546 } 547 for (i = 0; i < 3; i++) 548 free(attribs[i].pValue); 549 } 550 if ((rv = f->C_FindObjectsFinal(session)) != CKR_OK) 551 error("C_FindObjectsFinal failed: %lu", rv); 552 return (0); 553 } 554 555 #ifdef HAVE_DLOPEN 556 /* register a new provider, fails if provider already exists */ 557 int 558 pkcs11_add_provider(char *provider_id, char *pin, struct sshkey ***keyp) 559 { 560 int nkeys, need_finalize = 0; 561 struct pkcs11_provider *p = NULL; 562 void *handle = NULL; 563 CK_RV (*getfunctionlist)(CK_FUNCTION_LIST **); 564 CK_RV rv; 565 CK_FUNCTION_LIST *f = NULL; 566 CK_TOKEN_INFO *token; 567 CK_ULONG i; 568 569 *keyp = NULL; 570 if (pkcs11_provider_lookup(provider_id) != NULL) { 571 debug("%s: provider already registered: %s", 572 __func__, provider_id); 573 goto fail; 574 } 575 /* open shared pkcs11-libarary */ 576 if ((handle = dlopen(provider_id, RTLD_NOW)) == NULL) { 577 error("dlopen %s failed: %s", provider_id, dlerror()); 578 goto fail; 579 } 580 if ((getfunctionlist = dlsym(handle, "C_GetFunctionList")) == NULL) { 581 error("dlsym(C_GetFunctionList) failed: %s", dlerror()); 582 goto fail; 583 } 584 p = xcalloc(1, sizeof(*p)); 585 p->name = xstrdup(provider_id); 586 p->handle = handle; 587 /* setup the pkcs11 callbacks */ 588 if ((rv = (*getfunctionlist)(&f)) != CKR_OK) { 589 error("C_GetFunctionList for provider %s failed: %lu", 590 provider_id, rv); 591 goto fail; 592 } 593 p->function_list = f; 594 if ((rv = f->C_Initialize(NULL)) != CKR_OK) { 595 error("C_Initialize for provider %s failed: %lu", 596 provider_id, rv); 597 goto fail; 598 } 599 need_finalize = 1; 600 if ((rv = f->C_GetInfo(&p->info)) != CKR_OK) { 601 error("C_GetInfo for provider %s failed: %lu", 602 provider_id, rv); 603 goto fail; 604 } 605 rmspace(p->info.manufacturerID, sizeof(p->info.manufacturerID)); 606 rmspace(p->info.libraryDescription, sizeof(p->info.libraryDescription)); 607 debug("provider %s: manufacturerID <%s> cryptokiVersion %d.%d" 608 " libraryDescription <%s> libraryVersion %d.%d", 609 provider_id, 610 p->info.manufacturerID, 611 p->info.cryptokiVersion.major, 612 p->info.cryptokiVersion.minor, 613 p->info.libraryDescription, 614 p->info.libraryVersion.major, 615 p->info.libraryVersion.minor); 616 if ((rv = f->C_GetSlotList(CK_TRUE, NULL, &p->nslots)) != CKR_OK) { 617 error("C_GetSlotList failed: %lu", rv); 618 goto fail; 619 } 620 if (p->nslots == 0) { 621 debug("%s: provider %s returned no slots", __func__, 622 provider_id); 623 goto fail; 624 } 625 p->slotlist = xcalloc(p->nslots, sizeof(CK_SLOT_ID)); 626 if ((rv = f->C_GetSlotList(CK_TRUE, p->slotlist, &p->nslots)) 627 != CKR_OK) { 628 error("C_GetSlotList for provider %s failed: %lu", 629 provider_id, rv); 630 goto fail; 631 } 632 p->slotinfo = xcalloc(p->nslots, sizeof(struct pkcs11_slotinfo)); 633 p->valid = 1; 634 nkeys = 0; 635 for (i = 0; i < p->nslots; i++) { 636 token = &p->slotinfo[i].token; 637 if ((rv = f->C_GetTokenInfo(p->slotlist[i], token)) 638 != CKR_OK) { 639 error("C_GetTokenInfo for provider %s slot %lu " 640 "failed: %lu", provider_id, (unsigned long)i, rv); 641 continue; 642 } 643 if ((token->flags & CKF_TOKEN_INITIALIZED) == 0) { 644 debug2("%s: ignoring uninitialised token in " 645 "provider %s slot %lu", __func__, 646 provider_id, (unsigned long)i); 647 continue; 648 } 649 rmspace(token->label, sizeof(token->label)); 650 rmspace(token->manufacturerID, sizeof(token->manufacturerID)); 651 rmspace(token->model, sizeof(token->model)); 652 rmspace(token->serialNumber, sizeof(token->serialNumber)); 653 debug("provider %s slot %lu: label <%s> manufacturerID <%s> " 654 "model <%s> serial <%s> flags 0x%lx", 655 provider_id, (unsigned long)i, 656 token->label, token->manufacturerID, token->model, 657 token->serialNumber, token->flags); 658 /* open session, login with pin and retrieve public keys */ 659 if (pkcs11_open_session(p, i, pin) == 0) 660 pkcs11_fetch_keys(p, i, keyp, &nkeys); 661 } 662 if (nkeys > 0) { 663 TAILQ_INSERT_TAIL(&pkcs11_providers, p, next); 664 p->refcount++; /* add to provider list */ 665 return (nkeys); 666 } 667 debug("%s: provider %s returned no keys", __func__, provider_id); 668 /* don't add the provider, since it does not have any keys */ 669 fail: 670 if (need_finalize && (rv = f->C_Finalize(NULL)) != CKR_OK) 671 error("C_Finalize for provider %s failed: %lu", 672 provider_id, rv); 673 if (p) { 674 free(p->slotlist); 675 free(p->slotinfo); 676 free(p); 677 } 678 if (handle) 679 dlclose(handle); 680 return (-1); 681 } 682 #else 683 int 684 pkcs11_add_provider(char *provider_id, char *pin, struct sshkey ***keyp) 685 { 686 error("dlopen() not supported"); 687 return (-1); 688 } 689 #endif 690