1 /* $NetBSD: ssh-pkcs11.c,v 1.10 2016/03/11 01:55:00 christos Exp $ */ 2 /* $OpenBSD: ssh-pkcs11.c,v 1.22 2016/02/12 00:20:30 djm Exp $ */ 3 4 /* 5 * Copyright (c) 2010 Markus Friedl. All rights reserved. 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 #include "includes.h" 20 __RCSID("$NetBSD: ssh-pkcs11.c,v 1.10 2016/03/11 01:55:00 christos Exp $"); 21 22 #include <sys/types.h> 23 #include <sys/queue.h> 24 #include <sys/time.h> 25 #include <stdarg.h> 26 #include <stdio.h> 27 28 #include <string.h> 29 #include <dlfcn.h> 30 31 #include <openssl/x509.h> 32 33 #define CRYPTOKI_COMPAT 34 #include "pkcs11.h" 35 36 #include "log.h" 37 #include "misc.h" 38 #include "sshkey.h" 39 #include "ssh-pkcs11.h" 40 #include "xmalloc.h" 41 42 struct pkcs11_slotinfo { 43 CK_TOKEN_INFO token; 44 CK_SESSION_HANDLE session; 45 int logged_in; 46 }; 47 48 struct pkcs11_provider { 49 char *name; 50 void *handle; 51 CK_FUNCTION_LIST *function_list; 52 CK_INFO info; 53 CK_ULONG nslots; 54 CK_SLOT_ID *slotlist; 55 struct pkcs11_slotinfo *slotinfo; 56 int valid; 57 int refcount; 58 TAILQ_ENTRY(pkcs11_provider) next; 59 }; 60 61 TAILQ_HEAD(, pkcs11_provider) pkcs11_providers; 62 63 struct pkcs11_key { 64 struct pkcs11_provider *provider; 65 CK_ULONG slotidx; 66 int (*orig_finish)(RSA *rsa); 67 RSA_METHOD rsa_method; 68 char *keyid; 69 int keyid_len; 70 }; 71 72 int pkcs11_interactive = 0; 73 74 int 75 pkcs11_init(int interactive) 76 { 77 pkcs11_interactive = interactive; 78 TAILQ_INIT(&pkcs11_providers); 79 return (0); 80 } 81 82 /* 83 * finalize a provider shared libarary, it's no longer usable. 84 * however, there might still be keys referencing this provider, 85 * so the actuall freeing of memory is handled by pkcs11_provider_unref(). 86 * this is called when a provider gets unregistered. 87 */ 88 static void 89 pkcs11_provider_finalize(struct pkcs11_provider *p) 90 { 91 CK_RV rv; 92 CK_ULONG i; 93 94 debug("pkcs11_provider_finalize: %p refcount %d valid %d", 95 p, p->refcount, p->valid); 96 if (!p->valid) 97 return; 98 for (i = 0; i < p->nslots; i++) { 99 if (p->slotinfo[i].session && 100 (rv = p->function_list->C_CloseSession( 101 p->slotinfo[i].session)) != CKR_OK) 102 error("C_CloseSession failed: %lu", rv); 103 } 104 if ((rv = p->function_list->C_Finalize(NULL)) != CKR_OK) 105 error("C_Finalize failed: %lu", rv); 106 p->valid = 0; 107 p->function_list = NULL; 108 #ifdef HAVE_DLOPEN 109 dlclose(p->handle); 110 #endif 111 } 112 113 /* 114 * remove a reference to the provider. 115 * called when a key gets destroyed or when the provider is unregistered. 116 */ 117 static void 118 pkcs11_provider_unref(struct pkcs11_provider *p) 119 { 120 debug("pkcs11_provider_unref: %p refcount %d", p, p->refcount); 121 if (--p->refcount <= 0) { 122 if (p->valid) 123 error("pkcs11_provider_unref: %p still valid", p); 124 free(p->slotlist); 125 free(p->slotinfo); 126 free(p); 127 } 128 } 129 130 /* unregister all providers, keys might still point to the providers */ 131 void 132 pkcs11_terminate(void) 133 { 134 struct pkcs11_provider *p; 135 136 while ((p = TAILQ_FIRST(&pkcs11_providers)) != NULL) { 137 TAILQ_REMOVE(&pkcs11_providers, p, next); 138 pkcs11_provider_finalize(p); 139 pkcs11_provider_unref(p); 140 } 141 } 142 143 /* lookup provider by name */ 144 static struct pkcs11_provider * 145 pkcs11_provider_lookup(char *provider_id) 146 { 147 struct pkcs11_provider *p; 148 149 TAILQ_FOREACH(p, &pkcs11_providers, next) { 150 debug("check %p %s", p, p->name); 151 if (!strcmp(provider_id, p->name)) 152 return (p); 153 } 154 return (NULL); 155 } 156 157 /* unregister provider by name */ 158 int 159 pkcs11_del_provider(char *provider_id) 160 { 161 struct pkcs11_provider *p; 162 163 if ((p = pkcs11_provider_lookup(provider_id)) != NULL) { 164 TAILQ_REMOVE(&pkcs11_providers, p, next); 165 pkcs11_provider_finalize(p); 166 pkcs11_provider_unref(p); 167 return (0); 168 } 169 return (-1); 170 } 171 172 #ifdef HAVE_DLOPEN 173 /* openssl callback for freeing an RSA key */ 174 static int 175 pkcs11_rsa_finish(RSA *rsa) 176 { 177 struct pkcs11_key *k11; 178 int rv = -1; 179 180 if ((k11 = RSA_get_app_data(rsa)) != NULL) { 181 if (k11->orig_finish) 182 rv = k11->orig_finish(rsa); 183 if (k11->provider) 184 pkcs11_provider_unref(k11->provider); 185 free(k11->keyid); 186 free(k11); 187 } 188 return (rv); 189 } 190 191 /* find a single 'obj' for given attributes */ 192 static int 193 pkcs11_find(struct pkcs11_provider *p, CK_ULONG slotidx, CK_ATTRIBUTE *attr, 194 CK_ULONG nattr, CK_OBJECT_HANDLE *obj) 195 { 196 CK_FUNCTION_LIST *f; 197 CK_SESSION_HANDLE session; 198 CK_ULONG nfound = 0; 199 CK_RV rv; 200 int ret = -1; 201 202 f = p->function_list; 203 session = p->slotinfo[slotidx].session; 204 if ((rv = f->C_FindObjectsInit(session, attr, nattr)) != CKR_OK) { 205 error("C_FindObjectsInit failed (nattr %lu): %lu", nattr, rv); 206 return (-1); 207 } 208 if ((rv = f->C_FindObjects(session, obj, 1, &nfound)) != CKR_OK || 209 nfound != 1) { 210 debug("C_FindObjects failed (nfound %lu nattr %lu): %lu", 211 nfound, nattr, rv); 212 } else 213 ret = 0; 214 if ((rv = f->C_FindObjectsFinal(session)) != CKR_OK) 215 error("C_FindObjectsFinal failed: %lu", rv); 216 return (ret); 217 } 218 219 /* openssl callback doing the actual signing operation */ 220 static int 221 pkcs11_rsa_private_encrypt(int flen, const u_char *from, u_char *to, RSA *rsa, 222 int padding) 223 { 224 struct pkcs11_key *k11; 225 struct pkcs11_slotinfo *si; 226 CK_FUNCTION_LIST *f; 227 CK_OBJECT_HANDLE obj; 228 CK_ULONG tlen = 0; 229 CK_RV rv; 230 CK_OBJECT_CLASS private_key_class = CKO_PRIVATE_KEY; 231 CK_BBOOL true_val = CK_TRUE; 232 CK_MECHANISM mech = { 233 CKM_RSA_PKCS, NULL_PTR, 0 234 }; 235 CK_ATTRIBUTE key_filter[] = { 236 {CKA_CLASS, &private_key_class, sizeof(private_key_class) }, 237 {CKA_ID, NULL, 0}, 238 {CKA_SIGN, &true_val, sizeof(true_val) } 239 }; 240 char *pin = NULL, prompt[1024]; 241 int rval = -1; 242 243 if ((k11 = RSA_get_app_data(rsa)) == NULL) { 244 error("RSA_get_app_data failed for rsa %p", rsa); 245 return (-1); 246 } 247 if (!k11->provider || !k11->provider->valid) { 248 error("no pkcs11 (valid) provider for rsa %p", rsa); 249 return (-1); 250 } 251 f = k11->provider->function_list; 252 si = &k11->provider->slotinfo[k11->slotidx]; 253 if ((si->token.flags & CKF_LOGIN_REQUIRED) && !si->logged_in) { 254 if (!pkcs11_interactive) { 255 error("need pin entry%s", (si->token.flags & 256 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), 264 "Enter PIN for '%s': ", si->token.label); 265 pin = read_passphrase(prompt, RP_ALLOW_EOF); 266 if (pin == NULL) 267 return (-1); /* bail out */ 268 } 269 rv = f->C_Login(si->session, CKU_USER, (u_char *)pin, 270 (pin != NULL) ? strlen(pin) : 0); 271 if (pin != NULL) { 272 explicit_bzero(pin, strlen(pin)); 273 free(pin); 274 } 275 if (rv != CKR_OK && rv != CKR_USER_ALREADY_LOGGED_IN) { 276 error("C_Login failed: %lu", rv); 277 return (-1); 278 } 279 si->logged_in = 1; 280 } 281 key_filter[1].pValue = k11->keyid; 282 key_filter[1].ulValueLen = k11->keyid_len; 283 /* try to find object w/CKA_SIGN first, retry w/o */ 284 if (pkcs11_find(k11->provider, k11->slotidx, key_filter, 3, &obj) < 0 && 285 pkcs11_find(k11->provider, k11->slotidx, key_filter, 2, &obj) < 0) { 286 error("cannot find private key"); 287 } else if ((rv = f->C_SignInit(si->session, &mech, obj)) != CKR_OK) { 288 error("C_SignInit failed: %lu", rv); 289 } else { 290 /* XXX handle CKR_BUFFER_TOO_SMALL */ 291 tlen = RSA_size(rsa); 292 rv = f->C_Sign(si->session, __UNCONST(from), flen, to, &tlen); 293 if (rv == CKR_OK) 294 rval = tlen; 295 else 296 error("C_Sign failed: %lu", rv); 297 } 298 return (rval); 299 } 300 301 static int 302 pkcs11_rsa_private_decrypt(int flen, const u_char *from, u_char *to, RSA *rsa, 303 int padding) 304 { 305 return (-1); 306 } 307 308 /* redirect private key operations for rsa key to pkcs11 token */ 309 static int 310 pkcs11_rsa_wrap(struct pkcs11_provider *provider, CK_ULONG slotidx, 311 CK_ATTRIBUTE *keyid_attrib, RSA *rsa) 312 { 313 struct pkcs11_key *k11; 314 const RSA_METHOD *def = RSA_get_default_method(); 315 316 k11 = xcalloc(1, sizeof(*k11)); 317 k11->provider = provider; 318 provider->refcount++; /* provider referenced by RSA key */ 319 k11->slotidx = slotidx; 320 /* identify key object on smartcard */ 321 k11->keyid_len = keyid_attrib->ulValueLen; 322 if (k11->keyid_len > 0) { 323 k11->keyid = xmalloc(k11->keyid_len); 324 memcpy(k11->keyid, keyid_attrib->pValue, k11->keyid_len); 325 } 326 k11->orig_finish = def->finish; 327 memcpy(&k11->rsa_method, def, sizeof(k11->rsa_method)); 328 k11->rsa_method.name = "pkcs11"; 329 k11->rsa_method.rsa_priv_enc = pkcs11_rsa_private_encrypt; 330 k11->rsa_method.rsa_priv_dec = pkcs11_rsa_private_decrypt; 331 k11->rsa_method.finish = pkcs11_rsa_finish; 332 RSA_set_method(rsa, &k11->rsa_method); 333 RSA_set_app_data(rsa, k11); 334 return (0); 335 } 336 337 /* remove trailing spaces */ 338 static void 339 rmspace(u_char *buf, size_t len) 340 { 341 size_t i; 342 343 if (!len) 344 return; 345 for (i = len - 1; i > 0; i--) 346 if (i == len - 1 || buf[i] == ' ') 347 buf[i] = '\0'; 348 else 349 break; 350 } 351 352 /* 353 * open a pkcs11 session and login if required. 354 * if pin == NULL we delay login until key use 355 */ 356 static int 357 pkcs11_open_session(struct pkcs11_provider *p, CK_ULONG slotidx, char *pin) 358 { 359 CK_RV rv; 360 CK_FUNCTION_LIST *f; 361 CK_SESSION_HANDLE session; 362 int login_required; 363 364 f = p->function_list; 365 login_required = p->slotinfo[slotidx].token.flags & CKF_LOGIN_REQUIRED; 366 if (pin && login_required && !strlen(pin)) { 367 error("pin required"); 368 return (-1); 369 } 370 if ((rv = f->C_OpenSession(p->slotlist[slotidx], CKF_RW_SESSION| 371 CKF_SERIAL_SESSION, NULL, NULL, &session)) 372 != CKR_OK) { 373 error("C_OpenSession failed: %lu", rv); 374 return (-1); 375 } 376 if (login_required && pin) { 377 rv = f->C_Login(session, CKU_USER, 378 (u_char *)pin, strlen(pin)); 379 if (rv != CKR_OK && rv != CKR_USER_ALREADY_LOGGED_IN) { 380 error("C_Login failed: %lu", rv); 381 if ((rv = f->C_CloseSession(session)) != CKR_OK) 382 error("C_CloseSession failed: %lu", rv); 383 return (-1); 384 } 385 p->slotinfo[slotidx].logged_in = 1; 386 } 387 p->slotinfo[slotidx].session = session; 388 return (0); 389 } 390 391 /* 392 * lookup public keys for token in slot identified by slotidx, 393 * add 'wrapped' public keys to the 'keysp' array and increment nkeys. 394 * keysp points to an (possibly empty) array with *nkeys keys. 395 */ 396 static int pkcs11_fetch_keys_filter(struct pkcs11_provider *, CK_ULONG, 397 CK_ATTRIBUTE [], CK_ATTRIBUTE [3], struct sshkey ***, int *) 398 __attribute__((__bounded__(__minbytes__,4, 3 * sizeof(CK_ATTRIBUTE)))); 399 400 static int 401 pkcs11_fetch_keys(struct pkcs11_provider *p, CK_ULONG slotidx, 402 struct sshkey ***keysp, int *nkeys) 403 { 404 CK_OBJECT_CLASS pubkey_class = CKO_PUBLIC_KEY; 405 CK_OBJECT_CLASS cert_class = CKO_CERTIFICATE; 406 CK_ATTRIBUTE pubkey_filter[] = { 407 { CKA_CLASS, &pubkey_class, sizeof(pubkey_class) } 408 }; 409 CK_ATTRIBUTE cert_filter[] = { 410 { CKA_CLASS, &cert_class, sizeof(cert_class) } 411 }; 412 CK_ATTRIBUTE pubkey_attribs[] = { 413 { CKA_ID, NULL, 0 }, 414 { CKA_MODULUS, NULL, 0 }, 415 { CKA_PUBLIC_EXPONENT, NULL, 0 } 416 }; 417 CK_ATTRIBUTE cert_attribs[] = { 418 { CKA_ID, NULL, 0 }, 419 { CKA_SUBJECT, NULL, 0 }, 420 { CKA_VALUE, NULL, 0 } 421 }; 422 423 if (pkcs11_fetch_keys_filter(p, slotidx, pubkey_filter, pubkey_attribs, 424 keysp, nkeys) < 0 || 425 pkcs11_fetch_keys_filter(p, slotidx, cert_filter, cert_attribs, 426 keysp, nkeys) < 0) 427 return (-1); 428 return (0); 429 } 430 431 static int 432 pkcs11_key_included(struct sshkey ***keysp, int *nkeys, struct sshkey *key) 433 { 434 int i; 435 436 for (i = 0; i < *nkeys; i++) 437 if (sshkey_equal(key, (*keysp)[i])) 438 return (1); 439 return (0); 440 } 441 442 static int 443 pkcs11_fetch_keys_filter(struct pkcs11_provider *p, CK_ULONG slotidx, 444 CK_ATTRIBUTE filter[], CK_ATTRIBUTE attribs[3], 445 struct sshkey ***keysp, int *nkeys) 446 { 447 struct sshkey *key; 448 RSA *rsa; 449 X509 *x509; 450 EVP_PKEY *evp; 451 int i; 452 const u_char *cp; 453 CK_RV rv; 454 CK_OBJECT_HANDLE obj; 455 CK_ULONG nfound; 456 CK_SESSION_HANDLE session; 457 CK_FUNCTION_LIST *f; 458 459 f = p->function_list; 460 session = p->slotinfo[slotidx].session; 461 /* setup a filter the looks for public keys */ 462 if ((rv = f->C_FindObjectsInit(session, filter, 1)) != CKR_OK) { 463 error("C_FindObjectsInit failed: %lu", rv); 464 return (-1); 465 } 466 while (1) { 467 /* XXX 3 attributes in attribs[] */ 468 for (i = 0; i < 3; i++) { 469 attribs[i].pValue = NULL; 470 attribs[i].ulValueLen = 0; 471 } 472 if ((rv = f->C_FindObjects(session, &obj, 1, &nfound)) != CKR_OK 473 || nfound == 0) 474 break; 475 /* found a key, so figure out size of the attributes */ 476 if ((rv = f->C_GetAttributeValue(session, obj, attribs, 3)) 477 != CKR_OK) { 478 error("C_GetAttributeValue failed: %lu", rv); 479 continue; 480 } 481 /* 482 * Allow CKA_ID (always first attribute) to be empty, but 483 * ensure that none of the others are zero length. 484 * XXX assumes CKA_ID is always first. 485 */ 486 if (attribs[1].ulValueLen == 0 || 487 attribs[2].ulValueLen == 0) { 488 continue; 489 } 490 /* allocate buffers for attributes */ 491 for (i = 0; i < 3; i++) { 492 if (attribs[i].ulValueLen > 0) { 493 attribs[i].pValue = xmalloc( 494 attribs[i].ulValueLen); 495 } 496 } 497 498 /* 499 * retrieve ID, modulus and public exponent of RSA key, 500 * or ID, subject and value for certificates. 501 */ 502 rsa = NULL; 503 if ((rv = f->C_GetAttributeValue(session, obj, attribs, 3)) 504 != CKR_OK) { 505 error("C_GetAttributeValue failed: %lu", rv); 506 } else if (attribs[1].type == CKA_MODULUS ) { 507 if ((rsa = RSA_new()) == NULL) { 508 error("RSA_new failed"); 509 } else { 510 rsa->n = BN_bin2bn(attribs[1].pValue, 511 attribs[1].ulValueLen, NULL); 512 rsa->e = BN_bin2bn(attribs[2].pValue, 513 attribs[2].ulValueLen, NULL); 514 } 515 } else { 516 cp = attribs[2].pValue; 517 if ((x509 = X509_new()) == NULL) { 518 error("X509_new failed"); 519 } else if (d2i_X509(&x509, &cp, attribs[2].ulValueLen) 520 == NULL) { 521 error("d2i_X509 failed"); 522 } else if ((evp = X509_get_pubkey(x509)) == NULL || 523 evp->type != EVP_PKEY_RSA || 524 evp->pkey.rsa == NULL) { 525 debug("X509_get_pubkey failed or no rsa"); 526 } else if ((rsa = RSAPublicKey_dup(evp->pkey.rsa)) 527 == NULL) { 528 error("RSAPublicKey_dup"); 529 } 530 if (x509) 531 X509_free(x509); 532 } 533 if (rsa && rsa->n && rsa->e && 534 pkcs11_rsa_wrap(p, slotidx, &attribs[0], rsa) == 0) { 535 key = sshkey_new(KEY_UNSPEC); 536 key->rsa = rsa; 537 key->type = KEY_RSA; 538 key->flags |= SSHKEY_FLAG_EXT; 539 if (pkcs11_key_included(keysp, nkeys, key)) { 540 sshkey_free(key); 541 } else { 542 /* expand key array and add key */ 543 *keysp = xreallocarray(*keysp, *nkeys + 1, 544 sizeof(struct sshkey *)); 545 (*keysp)[*nkeys] = key; 546 *nkeys = *nkeys + 1; 547 debug("have %d keys", *nkeys); 548 } 549 } else if (rsa) { 550 RSA_free(rsa); 551 } 552 for (i = 0; i < 3; i++) 553 free(attribs[i].pValue); 554 } 555 if ((rv = f->C_FindObjectsFinal(session)) != CKR_OK) 556 error("C_FindObjectsFinal failed: %lu", rv); 557 return (0); 558 } 559 560 /* register a new provider, fails if provider already exists */ 561 int 562 pkcs11_add_provider(char *provider_id, char *pin, struct sshkey ***keyp) 563 { 564 int nkeys, need_finalize = 0; 565 struct pkcs11_provider *p = NULL; 566 void *handle = NULL; 567 CK_RV (*getfunctionlist)(CK_FUNCTION_LIST **); 568 CK_RV rv; 569 CK_FUNCTION_LIST *f = NULL; 570 CK_TOKEN_INFO *token; 571 CK_ULONG i; 572 573 *keyp = NULL; 574 if (pkcs11_provider_lookup(provider_id) != NULL) { 575 error("provider already registered: %s", provider_id); 576 goto fail; 577 } 578 /* open shared pkcs11-libarary */ 579 if ((handle = dlopen(provider_id, RTLD_NOW)) == NULL) { 580 error("dlopen %s failed: %s", provider_id, dlerror()); 581 goto fail; 582 } 583 if ((getfunctionlist = dlsym(handle, "C_GetFunctionList")) == NULL) { 584 error("dlsym(C_GetFunctionList) failed: %s", dlerror()); 585 goto fail; 586 } 587 p = xcalloc(1, sizeof(*p)); 588 p->name = xstrdup(provider_id); 589 p->handle = handle; 590 /* setup the pkcs11 callbacks */ 591 if ((rv = (*getfunctionlist)(&f)) != CKR_OK) { 592 error("C_GetFunctionList failed: %lu", rv); 593 goto fail; 594 } 595 p->function_list = f; 596 if ((rv = f->C_Initialize(NULL)) != CKR_OK) { 597 error("C_Initialize failed: %lu", rv); 598 goto fail; 599 } 600 need_finalize = 1; 601 if ((rv = f->C_GetInfo(&p->info)) != CKR_OK) { 602 error("C_GetInfo failed: %lu", 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("manufacturerID <%s> cryptokiVersion %d.%d" 608 " libraryDescription <%s> libraryVersion %d.%d", 609 p->info.manufacturerID, 610 p->info.cryptokiVersion.major, 611 p->info.cryptokiVersion.minor, 612 p->info.libraryDescription, 613 p->info.libraryVersion.major, 614 p->info.libraryVersion.minor); 615 if ((rv = f->C_GetSlotList(CK_TRUE, NULL, &p->nslots)) != CKR_OK) { 616 error("C_GetSlotList failed: %lu", rv); 617 goto fail; 618 } 619 if (p->nslots == 0) { 620 error("no slots"); 621 goto fail; 622 } 623 p->slotlist = xcalloc(p->nslots, sizeof(CK_SLOT_ID)); 624 if ((rv = f->C_GetSlotList(CK_TRUE, p->slotlist, &p->nslots)) 625 != CKR_OK) { 626 error("C_GetSlotList failed: %lu", rv); 627 goto fail; 628 } 629 p->slotinfo = xcalloc(p->nslots, sizeof(struct pkcs11_slotinfo)); 630 p->valid = 1; 631 nkeys = 0; 632 for (i = 0; i < p->nslots; i++) { 633 token = &p->slotinfo[i].token; 634 if ((rv = f->C_GetTokenInfo(p->slotlist[i], token)) 635 != CKR_OK) { 636 error("C_GetTokenInfo failed: %lu", rv); 637 continue; 638 } 639 if ((token->flags & CKF_TOKEN_INITIALIZED) == 0) { 640 debug2("%s: ignoring uninitialised token in slot %lu", 641 __func__, (unsigned long)i); 642 continue; 643 } 644 rmspace(token->label, sizeof(token->label)); 645 rmspace(token->manufacturerID, sizeof(token->manufacturerID)); 646 rmspace(token->model, sizeof(token->model)); 647 rmspace(token->serialNumber, sizeof(token->serialNumber)); 648 debug("label <%s> manufacturerID <%s> model <%s> serial <%s>" 649 " flags 0x%lx", 650 token->label, token->manufacturerID, token->model, 651 token->serialNumber, token->flags); 652 /* open session, login with pin and retrieve public keys */ 653 if (pkcs11_open_session(p, i, pin) == 0) 654 pkcs11_fetch_keys(p, i, keyp, &nkeys); 655 } 656 if (nkeys > 0) { 657 TAILQ_INSERT_TAIL(&pkcs11_providers, p, next); 658 p->refcount++; /* add to provider list */ 659 return (nkeys); 660 } 661 error("no keys"); 662 /* don't add the provider, since it does not have any keys */ 663 fail: 664 if (need_finalize && (rv = f->C_Finalize(NULL)) != CKR_OK) 665 error("C_Finalize failed: %lu", rv); 666 if (p) { 667 free(p->slotlist); 668 free(p->slotinfo); 669 free(p); 670 } 671 if (handle) 672 dlclose(handle); 673 return (-1); 674 } 675 #else 676 int 677 pkcs11_add_provider(char *provider_id, char *pin, struct sshkey ***keyp) 678 { 679 error("dlopen() not supported"); 680 return (-1); 681 } 682 #endif 683