1 /* $OpenBSD: ssh-pkcs11.c,v 1.27 2018/09/13 02:08:33 djm 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 RSA_meth_free(k11->rsa_method); 180 free(k11->keyid); 181 free(k11); 182 } 183 return (rv); 184 } 185 186 /* find a single 'obj' for given attributes */ 187 static int 188 pkcs11_find(struct pkcs11_provider *p, CK_ULONG slotidx, CK_ATTRIBUTE *attr, 189 CK_ULONG nattr, CK_OBJECT_HANDLE *obj) 190 { 191 CK_FUNCTION_LIST *f; 192 CK_SESSION_HANDLE session; 193 CK_ULONG nfound = 0; 194 CK_RV rv; 195 int ret = -1; 196 197 f = p->function_list; 198 session = p->slotinfo[slotidx].session; 199 if ((rv = f->C_FindObjectsInit(session, attr, nattr)) != CKR_OK) { 200 error("C_FindObjectsInit failed (nattr %lu): %lu", nattr, rv); 201 return (-1); 202 } 203 if ((rv = f->C_FindObjects(session, obj, 1, &nfound)) != CKR_OK || 204 nfound != 1) { 205 debug("C_FindObjects failed (nfound %lu nattr %lu): %lu", 206 nfound, nattr, rv); 207 } else 208 ret = 0; 209 if ((rv = f->C_FindObjectsFinal(session)) != CKR_OK) 210 error("C_FindObjectsFinal failed: %lu", rv); 211 return (ret); 212 } 213 214 /* openssl callback doing the actual signing operation */ 215 static int 216 pkcs11_rsa_private_encrypt(int flen, const u_char *from, u_char *to, RSA *rsa, 217 int padding) 218 { 219 struct pkcs11_key *k11; 220 struct pkcs11_slotinfo *si; 221 CK_FUNCTION_LIST *f; 222 CK_OBJECT_HANDLE obj; 223 CK_ULONG tlen = 0; 224 CK_RV rv; 225 CK_OBJECT_CLASS private_key_class = CKO_PRIVATE_KEY; 226 CK_BBOOL true_val = CK_TRUE; 227 CK_MECHANISM mech = { 228 CKM_RSA_PKCS, NULL_PTR, 0 229 }; 230 CK_ATTRIBUTE key_filter[] = { 231 {CKA_CLASS, &private_key_class, sizeof(private_key_class) }, 232 {CKA_ID, NULL, 0}, 233 {CKA_SIGN, &true_val, sizeof(true_val) } 234 }; 235 char *pin = NULL, prompt[1024]; 236 int rval = -1; 237 238 if ((k11 = RSA_get_app_data(rsa)) == NULL) { 239 error("RSA_get_app_data failed for rsa %p", rsa); 240 return (-1); 241 } 242 if (!k11->provider || !k11->provider->valid) { 243 error("no pkcs11 (valid) provider for rsa %p", rsa); 244 return (-1); 245 } 246 f = k11->provider->function_list; 247 si = &k11->provider->slotinfo[k11->slotidx]; 248 if ((si->token.flags & CKF_LOGIN_REQUIRED) && !si->logged_in) { 249 if (!pkcs11_interactive) { 250 error("need pin entry%s", (si->token.flags & 251 CKF_PROTECTED_AUTHENTICATION_PATH) ? 252 " on reader keypad" : ""); 253 return (-1); 254 } 255 if (si->token.flags & CKF_PROTECTED_AUTHENTICATION_PATH) 256 verbose("Deferring PIN entry to reader keypad."); 257 else { 258 snprintf(prompt, sizeof(prompt), 259 "Enter PIN for '%s': ", si->token.label); 260 pin = read_passphrase(prompt, RP_ALLOW_EOF); 261 if (pin == NULL) 262 return (-1); /* bail out */ 263 } 264 rv = f->C_Login(si->session, CKU_USER, (u_char *)pin, 265 (pin != NULL) ? strlen(pin) : 0); 266 if (pin != NULL) { 267 explicit_bzero(pin, strlen(pin)); 268 free(pin); 269 } 270 if (rv != CKR_OK && rv != CKR_USER_ALREADY_LOGGED_IN) { 271 error("C_Login failed: %lu", rv); 272 return (-1); 273 } 274 si->logged_in = 1; 275 } 276 key_filter[1].pValue = k11->keyid; 277 key_filter[1].ulValueLen = k11->keyid_len; 278 /* try to find object w/CKA_SIGN first, retry w/o */ 279 if (pkcs11_find(k11->provider, k11->slotidx, key_filter, 3, &obj) < 0 && 280 pkcs11_find(k11->provider, k11->slotidx, key_filter, 2, &obj) < 0) { 281 error("cannot find private key"); 282 } else if ((rv = f->C_SignInit(si->session, &mech, obj)) != CKR_OK) { 283 error("C_SignInit failed: %lu", rv); 284 } else { 285 /* XXX handle CKR_BUFFER_TOO_SMALL */ 286 tlen = RSA_size(rsa); 287 rv = f->C_Sign(si->session, (CK_BYTE *)from, flen, to, &tlen); 288 if (rv == CKR_OK) 289 rval = tlen; 290 else 291 error("C_Sign failed: %lu", rv); 292 } 293 return (rval); 294 } 295 296 static int 297 pkcs11_rsa_private_decrypt(int flen, const u_char *from, u_char *to, RSA *rsa, 298 int padding) 299 { 300 return (-1); 301 } 302 303 /* redirect private key operations for rsa key to pkcs11 token */ 304 static int 305 pkcs11_rsa_wrap(struct pkcs11_provider *provider, CK_ULONG slotidx, 306 CK_ATTRIBUTE *keyid_attrib, RSA *rsa) 307 { 308 struct pkcs11_key *k11; 309 const RSA_METHOD *def = RSA_get_default_method(); 310 311 k11 = xcalloc(1, sizeof(*k11)); 312 k11->provider = provider; 313 provider->refcount++; /* provider referenced by RSA key */ 314 k11->slotidx = slotidx; 315 /* identify key object on smartcard */ 316 k11->keyid_len = keyid_attrib->ulValueLen; 317 if (k11->keyid_len > 0) { 318 k11->keyid = xmalloc(k11->keyid_len); 319 memcpy(k11->keyid, keyid_attrib->pValue, k11->keyid_len); 320 } 321 k11->rsa_method = RSA_meth_dup(def); 322 if (k11->rsa_method == NULL) 323 fatal("%s: RSA_meth_dup failed", __func__); 324 k11->orig_finish = RSA_meth_get_finish(def); 325 if (!RSA_meth_set1_name(k11->rsa_method, "pkcs11") || 326 !RSA_meth_set_priv_enc(k11->rsa_method, 327 pkcs11_rsa_private_encrypt) || 328 !RSA_meth_set_priv_dec(k11->rsa_method, 329 pkcs11_rsa_private_decrypt) || 330 !RSA_meth_set_finish(k11->rsa_method, pkcs11_rsa_finish)) 331 fatal("%s: setup pkcs11 method failed", __func__); 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 have_rsa_key(const RSA *rsa) 444 { 445 const BIGNUM *rsa_n, *rsa_e; 446 447 RSA_get0_key(rsa, &rsa_n, &rsa_e, NULL); 448 return rsa_n != NULL && rsa_e != NULL; 449 } 450 451 static int 452 pkcs11_fetch_keys_filter(struct pkcs11_provider *p, CK_ULONG slotidx, 453 CK_ATTRIBUTE filter[], CK_ATTRIBUTE attribs[3], 454 struct sshkey ***keysp, int *nkeys) 455 { 456 struct sshkey *key; 457 RSA *rsa; 458 X509 *x509; 459 EVP_PKEY *evp; 460 int i; 461 const u_char *cp; 462 CK_RV rv; 463 CK_OBJECT_HANDLE obj; 464 CK_ULONG nfound; 465 CK_SESSION_HANDLE session; 466 CK_FUNCTION_LIST *f; 467 468 f = p->function_list; 469 session = p->slotinfo[slotidx].session; 470 /* setup a filter the looks for public keys */ 471 if ((rv = f->C_FindObjectsInit(session, filter, 1)) != CKR_OK) { 472 error("C_FindObjectsInit failed: %lu", rv); 473 return (-1); 474 } 475 while (1) { 476 /* XXX 3 attributes in attribs[] */ 477 for (i = 0; i < 3; i++) { 478 attribs[i].pValue = NULL; 479 attribs[i].ulValueLen = 0; 480 } 481 if ((rv = f->C_FindObjects(session, &obj, 1, &nfound)) != CKR_OK 482 || nfound == 0) 483 break; 484 /* found a key, so figure out size of the attributes */ 485 if ((rv = f->C_GetAttributeValue(session, obj, attribs, 3)) 486 != CKR_OK) { 487 error("C_GetAttributeValue failed: %lu", rv); 488 continue; 489 } 490 /* 491 * Allow CKA_ID (always first attribute) to be empty, but 492 * ensure that none of the others are zero length. 493 * XXX assumes CKA_ID is always first. 494 */ 495 if (attribs[1].ulValueLen == 0 || 496 attribs[2].ulValueLen == 0) { 497 continue; 498 } 499 /* allocate buffers for attributes */ 500 for (i = 0; i < 3; i++) { 501 if (attribs[i].ulValueLen > 0) { 502 attribs[i].pValue = xmalloc( 503 attribs[i].ulValueLen); 504 } 505 } 506 507 /* 508 * retrieve ID, modulus and public exponent of RSA key, 509 * or ID, subject and value for certificates. 510 */ 511 rsa = NULL; 512 if ((rv = f->C_GetAttributeValue(session, obj, attribs, 3)) 513 != CKR_OK) { 514 error("C_GetAttributeValue failed: %lu", rv); 515 } else if (attribs[1].type == CKA_MODULUS ) { 516 if ((rsa = RSA_new()) == NULL) { 517 error("RSA_new failed"); 518 } else { 519 BIGNUM *rsa_n, *rsa_e; 520 521 rsa_n = BN_bin2bn(attribs[1].pValue, 522 attribs[1].ulValueLen, NULL); 523 rsa_e = BN_bin2bn(attribs[2].pValue, 524 attribs[2].ulValueLen, NULL); 525 if (rsa_n != NULL && rsa_e != NULL) { 526 if (!RSA_set0_key(rsa, 527 rsa_n, rsa_e, NULL)) 528 fatal("%s: set key", __func__); 529 rsa_n = rsa_e = NULL; /* transferred */ 530 } 531 BN_free(rsa_n); 532 BN_free(rsa_e); 533 } 534 } else { 535 cp = attribs[2].pValue; 536 if ((x509 = X509_new()) == NULL) { 537 error("X509_new failed"); 538 } else if (d2i_X509(&x509, &cp, attribs[2].ulValueLen) 539 == NULL) { 540 error("d2i_X509 failed"); 541 } else if ((evp = X509_get_pubkey(x509)) == NULL || 542 EVP_PKEY_base_id(evp) != EVP_PKEY_RSA || 543 EVP_PKEY_get0_RSA(evp) == NULL) { 544 debug("X509_get_pubkey failed or no rsa"); 545 } else if ((rsa = RSAPublicKey_dup( 546 EVP_PKEY_get0_RSA(evp))) == NULL) { 547 error("RSAPublicKey_dup"); 548 } 549 X509_free(x509); 550 } 551 if (rsa && have_rsa_key(rsa) && 552 pkcs11_rsa_wrap(p, slotidx, &attribs[0], rsa) == 0) { 553 if ((key = sshkey_new(KEY_UNSPEC)) == NULL) 554 fatal("sshkey_new failed"); 555 key->rsa = rsa; 556 key->type = KEY_RSA; 557 key->flags |= SSHKEY_FLAG_EXT; 558 if (pkcs11_key_included(keysp, nkeys, key)) { 559 sshkey_free(key); 560 } else { 561 /* expand key array and add key */ 562 *keysp = xrecallocarray(*keysp, *nkeys, 563 *nkeys + 1, sizeof(struct sshkey *)); 564 (*keysp)[*nkeys] = key; 565 *nkeys = *nkeys + 1; 566 debug("have %d keys", *nkeys); 567 } 568 } else if (rsa) { 569 RSA_free(rsa); 570 } 571 for (i = 0; i < 3; i++) 572 free(attribs[i].pValue); 573 } 574 if ((rv = f->C_FindObjectsFinal(session)) != CKR_OK) 575 error("C_FindObjectsFinal failed: %lu", rv); 576 return (0); 577 } 578 579 #ifdef HAVE_DLOPEN 580 /* register a new provider, fails if provider already exists */ 581 int 582 pkcs11_add_provider(char *provider_id, char *pin, struct sshkey ***keyp) 583 { 584 int nkeys, need_finalize = 0; 585 struct pkcs11_provider *p = NULL; 586 void *handle = NULL; 587 CK_RV (*getfunctionlist)(CK_FUNCTION_LIST **); 588 CK_RV rv; 589 CK_FUNCTION_LIST *f = NULL; 590 CK_TOKEN_INFO *token; 591 CK_ULONG i; 592 593 *keyp = NULL; 594 if (pkcs11_provider_lookup(provider_id) != NULL) { 595 debug("%s: provider already registered: %s", 596 __func__, provider_id); 597 goto fail; 598 } 599 /* open shared pkcs11-libarary */ 600 if ((handle = dlopen(provider_id, RTLD_NOW)) == NULL) { 601 error("dlopen %s failed: %s", provider_id, dlerror()); 602 goto fail; 603 } 604 if ((getfunctionlist = dlsym(handle, "C_GetFunctionList")) == NULL) { 605 error("dlsym(C_GetFunctionList) failed: %s", dlerror()); 606 goto fail; 607 } 608 p = xcalloc(1, sizeof(*p)); 609 p->name = xstrdup(provider_id); 610 p->handle = handle; 611 /* setup the pkcs11 callbacks */ 612 if ((rv = (*getfunctionlist)(&f)) != CKR_OK) { 613 error("C_GetFunctionList for provider %s failed: %lu", 614 provider_id, rv); 615 goto fail; 616 } 617 p->function_list = f; 618 if ((rv = f->C_Initialize(NULL)) != CKR_OK) { 619 error("C_Initialize for provider %s failed: %lu", 620 provider_id, rv); 621 goto fail; 622 } 623 need_finalize = 1; 624 if ((rv = f->C_GetInfo(&p->info)) != CKR_OK) { 625 error("C_GetInfo for provider %s failed: %lu", 626 provider_id, rv); 627 goto fail; 628 } 629 rmspace(p->info.manufacturerID, sizeof(p->info.manufacturerID)); 630 rmspace(p->info.libraryDescription, sizeof(p->info.libraryDescription)); 631 debug("provider %s: manufacturerID <%s> cryptokiVersion %d.%d" 632 " libraryDescription <%s> libraryVersion %d.%d", 633 provider_id, 634 p->info.manufacturerID, 635 p->info.cryptokiVersion.major, 636 p->info.cryptokiVersion.minor, 637 p->info.libraryDescription, 638 p->info.libraryVersion.major, 639 p->info.libraryVersion.minor); 640 if ((rv = f->C_GetSlotList(CK_TRUE, NULL, &p->nslots)) != CKR_OK) { 641 error("C_GetSlotList failed: %lu", rv); 642 goto fail; 643 } 644 if (p->nslots == 0) { 645 debug("%s: provider %s returned no slots", __func__, 646 provider_id); 647 goto fail; 648 } 649 p->slotlist = xcalloc(p->nslots, sizeof(CK_SLOT_ID)); 650 if ((rv = f->C_GetSlotList(CK_TRUE, p->slotlist, &p->nslots)) 651 != CKR_OK) { 652 error("C_GetSlotList for provider %s failed: %lu", 653 provider_id, rv); 654 goto fail; 655 } 656 p->slotinfo = xcalloc(p->nslots, sizeof(struct pkcs11_slotinfo)); 657 p->valid = 1; 658 nkeys = 0; 659 for (i = 0; i < p->nslots; i++) { 660 token = &p->slotinfo[i].token; 661 if ((rv = f->C_GetTokenInfo(p->slotlist[i], token)) 662 != CKR_OK) { 663 error("C_GetTokenInfo for provider %s slot %lu " 664 "failed: %lu", provider_id, (unsigned long)i, rv); 665 continue; 666 } 667 if ((token->flags & CKF_TOKEN_INITIALIZED) == 0) { 668 debug2("%s: ignoring uninitialised token in " 669 "provider %s slot %lu", __func__, 670 provider_id, (unsigned long)i); 671 continue; 672 } 673 rmspace(token->label, sizeof(token->label)); 674 rmspace(token->manufacturerID, sizeof(token->manufacturerID)); 675 rmspace(token->model, sizeof(token->model)); 676 rmspace(token->serialNumber, sizeof(token->serialNumber)); 677 debug("provider %s slot %lu: label <%s> manufacturerID <%s> " 678 "model <%s> serial <%s> flags 0x%lx", 679 provider_id, (unsigned long)i, 680 token->label, token->manufacturerID, token->model, 681 token->serialNumber, token->flags); 682 /* open session, login with pin and retrieve public keys */ 683 if (pkcs11_open_session(p, i, pin) == 0) 684 pkcs11_fetch_keys(p, i, keyp, &nkeys); 685 } 686 if (nkeys > 0) { 687 TAILQ_INSERT_TAIL(&pkcs11_providers, p, next); 688 p->refcount++; /* add to provider list */ 689 return (nkeys); 690 } 691 debug("%s: provider %s returned no keys", __func__, provider_id); 692 /* don't add the provider, since it does not have any keys */ 693 fail: 694 if (need_finalize && (rv = f->C_Finalize(NULL)) != CKR_OK) 695 error("C_Finalize for provider %s failed: %lu", 696 provider_id, rv); 697 if (p) { 698 free(p->slotlist); 699 free(p->slotinfo); 700 free(p); 701 } 702 if (handle) 703 dlclose(handle); 704 return (-1); 705 } 706 #else 707 int 708 pkcs11_add_provider(char *provider_id, char *pin, struct sshkey ***keyp) 709 { 710 error("dlopen() not supported"); 711 return (-1); 712 } 713 #endif 714