| 1 | /* |
| 2 | * QEMU crypto TLS x509 credential support |
| 3 | * |
| 4 | * Copyright (c) 2015 Red Hat, Inc. |
| 5 | * |
| 6 | * This library is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * This library is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
| 18 | * |
| 19 | */ |
| 20 | |
| 21 | #include "qemu/osdep.h" |
| 22 | #include "crypto/tlscredsx509.h" |
| 23 | #include "tlscredspriv.h" |
| 24 | #include "crypto/secret.h" |
| 25 | #include "qapi/error.h" |
| 26 | #include "qemu/module.h" |
| 27 | #include "qom/object_interfaces.h" |
| 28 | #include "trace.h" |
| 29 | |
| 30 | |
| 31 | struct QCryptoTLSCredsX509 { |
| 32 | QCryptoTLSCreds parent_obj; |
| 33 | bool sanityCheck; |
| 34 | char *passwordid; |
| 35 | }; |
| 36 | |
| 37 | #ifdef CONFIG_GNUTLS |
| 38 | |
| 39 | #include <gnutls/gnutls.h> |
| 40 | #include <gnutls/x509.h> |
| 41 | |
| 42 | |
| 43 | typedef struct QCryptoTLSCredsX509IdentFiles QCryptoTLSCredsX509IdentFiles; |
| 44 | struct QCryptoTLSCredsX509IdentFiles { |
| 45 | char *certpath; |
| 46 | char *keypath; |
| 47 | gnutls_x509_crt_t *certs; |
| 48 | unsigned int ncerts; |
| 49 | gnutls_x509_privkey_t key; |
| 50 | }; |
| 51 | |
| 52 | typedef struct QCryptoTLSCredsX509Files QCryptoTLSCredsX509Files; |
| 53 | struct QCryptoTLSCredsX509Files { |
| 54 | char *cacertpath; |
| 55 | gnutls_x509_crt_t *cacerts; |
| 56 | unsigned int ncacerts; |
| 57 | |
| 58 | QCryptoTLSCredsX509IdentFiles **identities; |
| 59 | size_t nidentities; |
| 60 | }; |
| 61 | |
| 62 | static QCryptoTLSCredsX509Files * |
| 63 | qcrypto_tls_creds_x509_files_new(void) |
| 64 | { |
| 65 | return g_new0(QCryptoTLSCredsX509Files, 1); |
| 66 | } |
| 67 | |
| 68 | |
| 69 | static void |
| 70 | qcrypto_tls_creds_x509_ident_files_free(QCryptoTLSCredsX509IdentFiles *files) |
| 71 | { |
| 72 | size_t i; |
| 73 | for (i = 0; i < files->ncerts; i++) { |
| 74 | gnutls_x509_crt_deinit(files->certs[i]); |
| 75 | } |
| 76 | gnutls_x509_privkey_deinit(files->key); |
| 77 | g_free(files->certs); |
| 78 | g_free(files->certpath); |
| 79 | g_free(files->keypath); |
| 80 | g_free(files); |
| 81 | } |
| 82 | |
| 83 | G_DEFINE_AUTOPTR_CLEANUP_FUNC(QCryptoTLSCredsX509IdentFiles, |
| 84 | qcrypto_tls_creds_x509_ident_files_free); |
| 85 | |
| 86 | |
| 87 | static void |
| 88 | qcrypto_tls_creds_x509_files_free(QCryptoTLSCredsX509Files *files) |
| 89 | { |
| 90 | size_t i; |
| 91 | for (i = 0; i < files->ncacerts; i++) { |
| 92 | gnutls_x509_crt_deinit(files->cacerts[i]); |
| 93 | } |
| 94 | g_free(files->cacerts); |
| 95 | g_free(files->cacertpath); |
| 96 | for (i = 0; i < files->nidentities; i++) { |
| 97 | qcrypto_tls_creds_x509_ident_files_free(files->identities[i]); |
| 98 | } |
| 99 | g_free(files->identities); |
| 100 | g_free(files); |
| 101 | } |
| 102 | |
| 103 | G_DEFINE_AUTOPTR_CLEANUP_FUNC(QCryptoTLSCredsX509Files, |
| 104 | qcrypto_tls_creds_x509_files_free); |
| 105 | |
| 106 | static int |
| 107 | qcrypto_tls_creds_check_cert_times(gnutls_x509_crt_t cert, |
| 108 | const char *certFile, |
| 109 | bool isServer, |
| 110 | bool isCA, |
| 111 | Error **errp) |
| 112 | { |
| 113 | time_t now = time(NULL); |
| 114 | |
| 115 | if (now == ((time_t)-1)) { |
| 116 | error_setg_errno(errp, errno, "cannot get current time"); |
| 117 | return -1; |
| 118 | } |
| 119 | |
| 120 | if (gnutls_x509_crt_get_expiration_time(cert) < now) { |
| 121 | error_setg(errp, |
| 122 | (isCA ? |
| 123 | "The CA certificate %s has expired" : |
| 124 | (isServer ? |
| 125 | "The server certificate %s has expired" : |
| 126 | "The client certificate %s has expired")), |
| 127 | certFile); |
| 128 | return -1; |
| 129 | } |
| 130 | |
| 131 | if (gnutls_x509_crt_get_activation_time(cert) > now) { |
| 132 | error_setg(errp, |
| 133 | (isCA ? |
| 134 | "The CA certificate %s is not yet active" : |
| 135 | (isServer ? |
| 136 | "The server certificate %s is not yet active" : |
| 137 | "The client certificate %s is not yet active")), |
| 138 | certFile); |
| 139 | return -1; |
| 140 | } |
| 141 | |
| 142 | return 0; |
| 143 | } |
| 144 | |
| 145 | |
| 146 | static int |
| 147 | qcrypto_tls_creds_check_cert_basic_constraints(QCryptoTLSCredsX509 *creds, |
| 148 | gnutls_x509_crt_t cert, |
| 149 | const char *certFile, |
| 150 | bool isServer, |
| 151 | bool isCA, |
| 152 | Error **errp) |
| 153 | { |
| 154 | int status; |
| 155 | |
| 156 | status = gnutls_x509_crt_get_basic_constraints(cert, NULL, NULL, NULL); |
| 157 | trace_qcrypto_tls_creds_x509_check_basic_constraints( |
| 158 | creds, certFile, status); |
| 159 | |
| 160 | if (status > 0) { /* It is a CA cert */ |
| 161 | if (!isCA) { |
| 162 | error_setg(errp, isServer ? |
| 163 | "The certificate %s basic constraints show a CA, " |
| 164 | "but we need one for a server" : |
| 165 | "The certificate %s basic constraints show a CA, " |
| 166 | "but we need one for a client", |
| 167 | certFile); |
| 168 | return -1; |
| 169 | } |
| 170 | } else if (status == 0) { /* It is not a CA cert */ |
| 171 | if (isCA) { |
| 172 | error_setg(errp, |
| 173 | "The certificate %s basic constraints do not " |
| 174 | "show a CA", |
| 175 | certFile); |
| 176 | return -1; |
| 177 | } |
| 178 | } else if (status == GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE) { |
| 179 | /* Missing basicConstraints */ |
| 180 | if (isCA) { |
| 181 | error_setg(errp, |
| 182 | "The certificate %s is missing basic constraints " |
| 183 | "for a CA", |
| 184 | certFile); |
| 185 | return -1; |
| 186 | } |
| 187 | } else { /* General error */ |
| 188 | error_setg(errp, |
| 189 | "Unable to query certificate %s basic constraints: %s", |
| 190 | certFile, gnutls_strerror(status)); |
| 191 | return -1; |
| 192 | } |
| 193 | |
| 194 | return 0; |
| 195 | } |
| 196 | |
| 197 | |
| 198 | static int |
| 199 | qcrypto_tls_creds_check_cert_key_usage(QCryptoTLSCredsX509 *creds, |
| 200 | gnutls_x509_crt_t cert, |
| 201 | const char *certFile, |
| 202 | bool isCA, |
| 203 | Error **errp) |
| 204 | { |
| 205 | int status; |
| 206 | unsigned int usage = 0; |
| 207 | unsigned int critical = 0; |
| 208 | |
| 209 | status = gnutls_x509_crt_get_key_usage(cert, &usage, &critical); |
| 210 | trace_qcrypto_tls_creds_x509_check_key_usage( |
| 211 | creds, certFile, status, usage, critical); |
| 212 | |
| 213 | if (status < 0) { |
| 214 | if (status == GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE) { |
| 215 | usage = isCA ? GNUTLS_KEY_KEY_CERT_SIGN : |
| 216 | GNUTLS_KEY_DIGITAL_SIGNATURE; |
| 217 | } else { |
| 218 | error_setg(errp, |
| 219 | "Unable to query certificate %s key usage: %s", |
| 220 | certFile, gnutls_strerror(status)); |
| 221 | return -1; |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | if (isCA) { |
| 226 | if (!(usage & GNUTLS_KEY_KEY_CERT_SIGN)) { |
| 227 | if (critical) { |
| 228 | error_setg(errp, |
| 229 | "Certificate %s usage does not permit " |
| 230 | "certificate signing", certFile); |
| 231 | return -1; |
| 232 | } |
| 233 | } |
| 234 | } else { |
| 235 | if (!(usage & GNUTLS_KEY_DIGITAL_SIGNATURE)) { |
| 236 | if (critical) { |
| 237 | error_setg(errp, |
| 238 | "Certificate %s usage does not permit digital " |
| 239 | "signature", certFile); |
| 240 | return -1; |
| 241 | } |
| 242 | } |
| 243 | } |
| 244 | |
| 245 | return 0; |
| 246 | } |
| 247 | |
| 248 | |
| 249 | static int |
| 250 | qcrypto_tls_creds_check_cert_key_purpose(QCryptoTLSCredsX509 *creds, |
| 251 | gnutls_x509_crt_t cert, |
| 252 | const char *certFile, |
| 253 | bool isServer, |
| 254 | Error **errp) |
| 255 | { |
| 256 | int status; |
| 257 | size_t i; |
| 258 | unsigned int purposeCritical; |
| 259 | unsigned int critical; |
| 260 | char *buffer = NULL; |
| 261 | size_t size; |
| 262 | bool allowClient = false, allowServer = false; |
| 263 | |
| 264 | critical = 0; |
| 265 | for (i = 0; ; i++) { |
| 266 | size = 0; |
| 267 | status = gnutls_x509_crt_get_key_purpose_oid(cert, i, buffer, |
| 268 | &size, NULL); |
| 269 | |
| 270 | if (status == GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE) { |
| 271 | |
| 272 | /* If there is no data at all, then we must allow |
| 273 | client/server to pass */ |
| 274 | if (i == 0) { |
| 275 | allowServer = allowClient = true; |
| 276 | } |
| 277 | break; |
| 278 | } |
| 279 | if (status != GNUTLS_E_SHORT_MEMORY_BUFFER) { |
| 280 | error_setg(errp, |
| 281 | "Unable to query certificate %s key purpose: %s", |
| 282 | certFile, gnutls_strerror(status)); |
| 283 | return -1; |
| 284 | } |
| 285 | |
| 286 | buffer = g_new0(char, size); |
| 287 | |
| 288 | status = gnutls_x509_crt_get_key_purpose_oid(cert, i, buffer, |
| 289 | &size, &purposeCritical); |
| 290 | |
| 291 | if (status < 0) { |
| 292 | trace_qcrypto_tls_creds_x509_check_key_purpose( |
| 293 | creds, certFile, status, "<none>", purposeCritical); |
| 294 | g_free(buffer); |
| 295 | error_setg(errp, |
| 296 | "Unable to query certificate %s key purpose: %s", |
| 297 | certFile, gnutls_strerror(status)); |
| 298 | return -1; |
| 299 | } |
| 300 | trace_qcrypto_tls_creds_x509_check_key_purpose( |
| 301 | creds, certFile, status, buffer, purposeCritical); |
| 302 | if (purposeCritical) { |
| 303 | critical = true; |
| 304 | } |
| 305 | |
| 306 | if (g_str_equal(buffer, GNUTLS_KP_TLS_WWW_SERVER)) { |
| 307 | allowServer = true; |
| 308 | } else if (g_str_equal(buffer, GNUTLS_KP_TLS_WWW_CLIENT)) { |
| 309 | allowClient = true; |
| 310 | } else if (g_str_equal(buffer, GNUTLS_KP_ANY)) { |
| 311 | allowServer = allowClient = true; |
| 312 | } |
| 313 | |
| 314 | g_free(buffer); |
| 315 | buffer = NULL; |
| 316 | } |
| 317 | |
| 318 | if (isServer) { |
| 319 | if (!allowServer) { |
| 320 | if (critical) { |
| 321 | error_setg(errp, |
| 322 | "Certificate %s purpose does not allow " |
| 323 | "use with a TLS server", certFile); |
| 324 | return -1; |
| 325 | } |
| 326 | } |
| 327 | } else { |
| 328 | if (!allowClient) { |
| 329 | if (critical) { |
| 330 | error_setg(errp, |
| 331 | "Certificate %s purpose does not allow use " |
| 332 | "with a TLS client", certFile); |
| 333 | return -1; |
| 334 | } |
| 335 | } |
| 336 | } |
| 337 | |
| 338 | return 0; |
| 339 | } |
| 340 | |
| 341 | |
| 342 | static int |
| 343 | qcrypto_tls_creds_check_cert(QCryptoTLSCredsX509 *creds, |
| 344 | gnutls_x509_crt_t cert, |
| 345 | const char *certFile, |
| 346 | bool isServer, |
| 347 | bool isCA, |
| 348 | Error **errp) |
| 349 | { |
| 350 | if (qcrypto_tls_creds_check_cert_times(cert, certFile, |
| 351 | isServer, isCA, |
| 352 | errp) < 0) { |
| 353 | return -1; |
| 354 | } |
| 355 | |
| 356 | if (qcrypto_tls_creds_check_cert_basic_constraints(creds, |
| 357 | cert, certFile, |
| 358 | isServer, isCA, |
| 359 | errp) < 0) { |
| 360 | return -1; |
| 361 | } |
| 362 | |
| 363 | if (qcrypto_tls_creds_check_cert_key_usage(creds, |
| 364 | cert, certFile, |
| 365 | isCA, errp) < 0) { |
| 366 | return -1; |
| 367 | } |
| 368 | |
| 369 | if (!isCA && |
| 370 | qcrypto_tls_creds_check_cert_key_purpose(creds, |
| 371 | cert, certFile, |
| 372 | isServer, errp) < 0) { |
| 373 | return -1; |
| 374 | } |
| 375 | |
| 376 | return 0; |
| 377 | } |
| 378 | |
| 379 | static int |
| 380 | qcrypto_tls_creds_check_authority_chain(QCryptoTLSCredsX509 *creds, |
| 381 | QCryptoTLSCredsX509Files *files, |
| 382 | gnutls_x509_crt_t *certs, |
| 383 | unsigned int ncerts, |
| 384 | bool isServer, |
| 385 | Error **errp) |
| 386 | { |
| 387 | gnutls_x509_crt_t cert_to_check = certs[ncerts - 1]; |
| 388 | int retval = 0; |
| 389 | gnutls_datum_t dn = {}, dnissuer = {}; |
| 390 | |
| 391 | for (int i = 0; i < (ncerts - 1); i++) { |
| 392 | if (!gnutls_x509_crt_check_issuer(certs[i], certs[i + 1])) { |
| 393 | retval = gnutls_x509_crt_get_dn2(certs[i], &dn); |
| 394 | if (retval < 0) { |
| 395 | error_setg(errp, "Unable to fetch cert DN: %s", |
| 396 | gnutls_strerror(retval)); |
| 397 | return -1; |
| 398 | } |
| 399 | retval = gnutls_x509_crt_get_dn2(certs[i + 1], &dnissuer); |
| 400 | if (retval < 0) { |
| 401 | g_free(dn.data); |
| 402 | error_setg(errp, "Unable to fetch cert DN: %s", |
| 403 | gnutls_strerror(retval)); |
| 404 | return -1; |
| 405 | } |
| 406 | error_setg(errp, "Cert '%s' does not match issuer of cert '%s'", |
| 407 | dnissuer.data, dn.data); |
| 408 | g_free(dn.data); |
| 409 | g_free(dnissuer.data); |
| 410 | return -1; |
| 411 | } |
| 412 | } |
| 413 | |
| 414 | for (;;) { |
| 415 | gnutls_x509_crt_t cert_issuer = NULL; |
| 416 | |
| 417 | if (gnutls_x509_crt_check_issuer(cert_to_check, |
| 418 | cert_to_check)) { |
| 419 | /* |
| 420 | * The cert is self-signed indicating we have |
| 421 | * reached the root of trust. |
| 422 | */ |
| 423 | return qcrypto_tls_creds_check_cert( |
| 424 | creds, cert_to_check, files->cacertpath, |
| 425 | isServer, true, errp); |
| 426 | } |
| 427 | for (int i = 0; i < files->ncacerts; i++) { |
| 428 | if (gnutls_x509_crt_check_issuer(cert_to_check, |
| 429 | files->cacerts[i])) { |
| 430 | cert_issuer = files->cacerts[i]; |
| 431 | break; |
| 432 | } |
| 433 | } |
| 434 | if (!cert_issuer) { |
| 435 | break; |
| 436 | } |
| 437 | |
| 438 | if (qcrypto_tls_creds_check_cert(creds, cert_issuer, files->cacertpath, |
| 439 | isServer, true, errp) < 0) { |
| 440 | return -1; |
| 441 | } |
| 442 | |
| 443 | cert_to_check = cert_issuer; |
| 444 | } |
| 445 | |
| 446 | retval = gnutls_x509_crt_get_dn2(cert_to_check, &dn); |
| 447 | if (retval < 0) { |
| 448 | error_setg(errp, "Unable to fetch cert DN: %s", |
| 449 | gnutls_strerror(retval)); |
| 450 | return -1; |
| 451 | } |
| 452 | error_setg(errp, "Cert '%s' has no issuer in CA chain", dn.data); |
| 453 | g_free(dn.data); |
| 454 | return -1; |
| 455 | } |
| 456 | |
| 457 | static int |
| 458 | qcrypto_tls_creds_check_cert_pair(QCryptoTLSCredsX509Files *files, |
| 459 | gnutls_x509_crt_t *certs, |
| 460 | size_t ncerts, |
| 461 | const char *certFile, |
| 462 | bool isServer, |
| 463 | Error **errp) |
| 464 | { |
| 465 | unsigned int status; |
| 466 | |
| 467 | if (gnutls_x509_crt_list_verify(certs, ncerts, |
| 468 | files->cacerts, files->ncacerts, |
| 469 | NULL, 0, |
| 470 | 0, &status) < 0) { |
| 471 | error_setg(errp, isServer ? |
| 472 | "Unable to verify server certificate %s against " |
| 473 | "CA certificate %s" : |
| 474 | "Unable to verify client certificate %s against " |
| 475 | "CA certificate %s", |
| 476 | certFile, files->cacertpath); |
| 477 | return -1; |
| 478 | } |
| 479 | |
| 480 | if (status != 0) { |
| 481 | const char *reason = "Invalid certificate"; |
| 482 | |
| 483 | if (status & GNUTLS_CERT_INVALID) { |
| 484 | reason = "The certificate is not trusted"; |
| 485 | } |
| 486 | |
| 487 | if (status & GNUTLS_CERT_SIGNER_NOT_FOUND) { |
| 488 | reason = "The certificate hasn't got a known issuer"; |
| 489 | } |
| 490 | |
| 491 | if (status & GNUTLS_CERT_REVOKED) { |
| 492 | reason = "The certificate has been revoked"; |
| 493 | } |
| 494 | |
| 495 | if (status & GNUTLS_CERT_INSECURE_ALGORITHM) { |
| 496 | reason = "The certificate uses an insecure algorithm"; |
| 497 | } |
| 498 | |
| 499 | error_setg(errp, |
| 500 | "Our own certificate %s failed validation against %s: %s", |
| 501 | certFile, files->cacertpath, reason); |
| 502 | return -1; |
| 503 | } |
| 504 | |
| 505 | return 0; |
| 506 | } |
| 507 | |
| 508 | |
| 509 | static int |
| 510 | qcrypto_tls_creds_load_cert_list(QCryptoTLSCredsX509 *creds, |
| 511 | const char *certFile, |
| 512 | gnutls_x509_crt_t **certs, |
| 513 | unsigned int *ncerts, |
| 514 | Error **errp) |
| 515 | { |
| 516 | gnutls_datum_t data; |
| 517 | g_autofree char *buf = NULL; |
| 518 | gsize buflen; |
| 519 | GError *gerr = NULL; |
| 520 | int ret; |
| 521 | |
| 522 | *ncerts = 0; |
| 523 | trace_qcrypto_tls_creds_x509_load_cert_list(creds, certFile); |
| 524 | |
| 525 | if (!g_file_get_contents(certFile, &buf, &buflen, &gerr)) { |
| 526 | error_setg(errp, "Cannot load CA cert list %s: %s", |
| 527 | certFile, gerr->message); |
| 528 | g_error_free(gerr); |
| 529 | return -1; |
| 530 | } |
| 531 | |
| 532 | data.data = (unsigned char *)buf; |
| 533 | data.size = strlen(buf); |
| 534 | |
| 535 | ret = gnutls_x509_crt_list_import2(certs, ncerts, &data, |
| 536 | GNUTLS_X509_FMT_PEM, 0); |
| 537 | if (ret < 0) { |
| 538 | error_setg(errp, "Unable to import certificate %s: %s", |
| 539 | certFile, gnutls_strerror(ret)); |
| 540 | return -1; |
| 541 | } |
| 542 | |
| 543 | return 0; |
| 544 | } |
| 545 | |
| 546 | |
| 547 | static int |
| 548 | qcrypto_tls_creds_load_privkey(QCryptoTLSCredsX509 *creds, |
| 549 | const char *keyFile, |
| 550 | gnutls_x509_privkey_t *key, |
| 551 | Error **errp) |
| 552 | { |
| 553 | gnutls_datum_t data; |
| 554 | g_autofree char *buf = NULL; |
| 555 | g_autofree char *password = NULL; |
| 556 | gsize buflen; |
| 557 | GError *gerr = NULL; |
| 558 | int ret; |
| 559 | |
| 560 | ret = gnutls_x509_privkey_init(key); |
| 561 | if (ret < 0) { |
| 562 | error_setg(errp, "Unable to initialize private key: %s", |
| 563 | gnutls_strerror(ret)); |
| 564 | return -1; |
| 565 | } |
| 566 | |
| 567 | if (!g_file_get_contents(keyFile, &buf, &buflen, &gerr)) { |
| 568 | error_setg(errp, "Cannot load private key %s: %s", |
| 569 | keyFile, gerr->message); |
| 570 | g_error_free(gerr); |
| 571 | return -1; |
| 572 | } |
| 573 | |
| 574 | data.data = (unsigned char *)buf; |
| 575 | data.size = strlen(buf); |
| 576 | |
| 577 | if (creds->passwordid) { |
| 578 | password = qcrypto_secret_lookup_as_utf8(creds->passwordid, |
| 579 | errp); |
| 580 | if (!password) { |
| 581 | return -1; |
| 582 | } |
| 583 | } |
| 584 | |
| 585 | if (gnutls_x509_privkey_import2(*key, &data, |
| 586 | GNUTLS_X509_FMT_PEM, |
| 587 | password, 0) < 0) { |
| 588 | error_setg(errp, "Unable to import private key %s", keyFile); |
| 589 | return -1; |
| 590 | } |
| 591 | |
| 592 | return 0; |
| 593 | } |
| 594 | |
| 595 | |
| 596 | static int |
| 597 | qcrypto_tls_creds_x509_sanity_check_identity(QCryptoTLSCredsX509 *creds, |
| 598 | QCryptoTLSCredsX509Files *files, |
| 599 | QCryptoTLSCredsX509IdentFiles *ifiles, |
| 600 | bool isServer, |
| 601 | Error **errp) |
| 602 | { |
| 603 | size_t i; |
| 604 | |
| 605 | for (i = 0; i < ifiles->ncerts; i++) { |
| 606 | if (qcrypto_tls_creds_check_cert(creds, |
| 607 | ifiles->certs[i], ifiles->certpath, |
| 608 | isServer, i != 0, errp) < 0) { |
| 609 | return -1; |
| 610 | } |
| 611 | } |
| 612 | |
| 613 | if (ifiles->ncerts && |
| 614 | qcrypto_tls_creds_check_authority_chain(creds, files, |
| 615 | ifiles->certs, ifiles->ncerts, |
| 616 | isServer, errp) < 0) { |
| 617 | return -1; |
| 618 | } |
| 619 | |
| 620 | if (ifiles->ncerts && |
| 621 | qcrypto_tls_creds_check_cert_pair(files, ifiles->certs, ifiles->ncerts, |
| 622 | ifiles->certpath, isServer, errp) < 0) { |
| 623 | return -1; |
| 624 | } |
| 625 | |
| 626 | return 0; |
| 627 | } |
| 628 | |
| 629 | |
| 630 | static int |
| 631 | qcrypto_tls_creds_x509_sanity_check(QCryptoTLSCredsX509 *creds, |
| 632 | QCryptoTLSCredsX509Files *files, |
| 633 | bool isServer, |
| 634 | Error **errp) |
| 635 | { |
| 636 | size_t i; |
| 637 | for (i = 0; i < files->nidentities; i++) { |
| 638 | if (qcrypto_tls_creds_x509_sanity_check_identity(creds, |
| 639 | files, |
| 640 | files->identities[i], |
| 641 | isServer, |
| 642 | errp) < 0) { |
| 643 | return -1; |
| 644 | } |
| 645 | } |
| 646 | return 0; |
| 647 | } |
| 648 | |
| 649 | |
| 650 | static int |
| 651 | qcrypto_tls_creds_x509_load_ca(QCryptoTLSCredsX509 *creds, |
| 652 | QCryptoTLSCredsBox *box, |
| 653 | QCryptoTLSCredsX509Files *files, |
| 654 | bool isServer, |
| 655 | Error **errp) |
| 656 | { |
| 657 | int ret; |
| 658 | |
| 659 | if (qcrypto_tls_creds_get_path(&creds->parent_obj, |
| 660 | QCRYPTO_TLS_CREDS_X509_CA_CERT, |
| 661 | true, &files->cacertpath, errp) < 0) { |
| 662 | return -1; |
| 663 | } |
| 664 | |
| 665 | if (qcrypto_tls_creds_load_cert_list(creds, |
| 666 | files->cacertpath, |
| 667 | &files->cacerts, |
| 668 | &files->ncacerts, |
| 669 | errp) < 0) { |
| 670 | return -1; |
| 671 | } |
| 672 | |
| 673 | ret = gnutls_certificate_set_x509_trust(box->data.cert, |
| 674 | files->cacerts, files->ncacerts); |
| 675 | if (ret < 0) { |
| 676 | error_setg(errp, "Cannot set CA certificate '%s': %s", |
| 677 | files->cacertpath, gnutls_strerror(ret)); |
| 678 | return -1; |
| 679 | } |
| 680 | |
| 681 | return 0; |
| 682 | } |
| 683 | |
| 684 | |
| 685 | static QCryptoTLSCredsX509IdentFiles * |
| 686 | qcrypto_tls_creds_x509_load_identity(QCryptoTLSCredsX509 *creds, |
| 687 | QCryptoTLSCredsBox *box, |
| 688 | const char *certbase, |
| 689 | const char *keybase, |
| 690 | Error **errp) |
| 691 | { |
| 692 | g_autoptr(QCryptoTLSCredsX509IdentFiles) files = |
| 693 | g_new0(QCryptoTLSCredsX509IdentFiles, 1); |
| 694 | int ret; |
| 695 | |
| 696 | if (qcrypto_tls_creds_get_path(&creds->parent_obj, certbase, |
| 697 | false, &files->certpath, errp) < 0 || |
| 698 | qcrypto_tls_creds_get_path(&creds->parent_obj, keybase, |
| 699 | false, &files->keypath, errp) < 0) { |
| 700 | return NULL; |
| 701 | } |
| 702 | |
| 703 | if (!files->certpath && |
| 704 | !files->keypath) { |
| 705 | return NULL; |
| 706 | } |
| 707 | if (files->certpath && !files->keypath) { |
| 708 | g_autofree char *keypath = |
| 709 | qcrypto_tls_creds_build_path(&creds->parent_obj, keybase); |
| 710 | error_setg(errp, "Cert '%s' without corresponding key '%s'", |
| 711 | files->certpath, keypath); |
| 712 | return NULL; |
| 713 | } |
| 714 | if (!files->certpath && files->keypath) { |
| 715 | g_autofree char *certpath = |
| 716 | qcrypto_tls_creds_build_path(&creds->parent_obj, certbase); |
| 717 | error_setg(errp, "Key '%s' without corresponding cert '%s'", |
| 718 | files->keypath, certpath); |
| 719 | return NULL; |
| 720 | } |
| 721 | |
| 722 | if (qcrypto_tls_creds_load_cert_list(creds, |
| 723 | files->certpath, |
| 724 | &files->certs, |
| 725 | &files->ncerts, |
| 726 | errp) < 0) { |
| 727 | return NULL; |
| 728 | } |
| 729 | |
| 730 | if (qcrypto_tls_creds_load_privkey(creds, |
| 731 | files->keypath, |
| 732 | &files->key, |
| 733 | errp) < 0) { |
| 734 | return NULL; |
| 735 | } |
| 736 | |
| 737 | ret = gnutls_certificate_set_x509_key(box->data.cert, |
| 738 | files->certs, |
| 739 | files->ncerts, |
| 740 | files->key); |
| 741 | if (ret < 0) { |
| 742 | error_setg(errp, "Cannot set certificate '%s' & key '%s': %s", |
| 743 | files->certpath, files->keypath, gnutls_strerror(ret)); |
| 744 | return NULL; |
| 745 | } |
| 746 | return g_steal_pointer(&files); |
| 747 | } |
| 748 | |
| 749 | |
| 750 | static int |
| 751 | qcrypto_tls_creds_x509_load_identities(QCryptoTLSCredsX509 *creds, |
| 752 | QCryptoTLSCredsBox *box, |
| 753 | QCryptoTLSCredsX509Files *files, |
| 754 | bool isServer, |
| 755 | Error **errp) |
| 756 | { |
| 757 | ERRP_GUARD(); |
| 758 | QCryptoTLSCredsX509IdentFiles *ifiles; |
| 759 | size_t i; |
| 760 | |
| 761 | ifiles = qcrypto_tls_creds_x509_load_identity( |
| 762 | creds, box, |
| 763 | isServer ? |
| 764 | QCRYPTO_TLS_CREDS_X509_SERVER_CERT : |
| 765 | QCRYPTO_TLS_CREDS_X509_CLIENT_CERT, |
| 766 | isServer ? |
| 767 | QCRYPTO_TLS_CREDS_X509_SERVER_KEY : |
| 768 | QCRYPTO_TLS_CREDS_X509_CLIENT_KEY, |
| 769 | errp); |
| 770 | if (!ifiles && *errp) { |
| 771 | return -1; |
| 772 | } |
| 773 | |
| 774 | if (ifiles) { |
| 775 | files->identities = g_renew(QCryptoTLSCredsX509IdentFiles *, |
| 776 | files->identities, |
| 777 | files->nidentities + 1); |
| 778 | files->identities[files->nidentities++] = ifiles; |
| 779 | } |
| 780 | |
| 781 | for (i = 0; i < QCRYPTO_TLS_CREDS_X509_IDENTITY_MAX; i++) { |
| 782 | g_autofree char *cert = g_strdup_printf( |
| 783 | isServer ? |
| 784 | QCRYPTO_TLS_CREDS_X509_SERVER_CERT_N : |
| 785 | QCRYPTO_TLS_CREDS_X509_CLIENT_CERT_N, i); |
| 786 | g_autofree char *key = g_strdup_printf( |
| 787 | isServer ? |
| 788 | QCRYPTO_TLS_CREDS_X509_SERVER_KEY_N : |
| 789 | QCRYPTO_TLS_CREDS_X509_CLIENT_KEY_N, i); |
| 790 | |
| 791 | ifiles = qcrypto_tls_creds_x509_load_identity(creds, box, |
| 792 | cert, key, errp); |
| 793 | if (!ifiles && *errp) { |
| 794 | return -1; |
| 795 | } |
| 796 | if (!ifiles) { |
| 797 | break; |
| 798 | } |
| 799 | |
| 800 | files->identities = g_renew(QCryptoTLSCredsX509IdentFiles *, |
| 801 | files->identities, |
| 802 | files->nidentities + 1); |
| 803 | files->identities[files->nidentities++] = ifiles; |
| 804 | } |
| 805 | |
| 806 | if (files->nidentities == 0 && isServer) { |
| 807 | g_autofree char *certpath = qcrypto_tls_creds_build_path( |
| 808 | &creds->parent_obj, QCRYPTO_TLS_CREDS_X509_SERVER_CERT); |
| 809 | g_autofree char *keypath = qcrypto_tls_creds_build_path( |
| 810 | &creds->parent_obj, QCRYPTO_TLS_CREDS_X509_SERVER_KEY); |
| 811 | error_setg(errp, "Missing server cert '%s' & key '%s'", |
| 812 | certpath, keypath); |
| 813 | return -1; |
| 814 | } |
| 815 | |
| 816 | return 0; |
| 817 | } |
| 818 | |
| 819 | |
| 820 | static int |
| 821 | qcrypto_tls_creds_x509_load(QCryptoTLSCredsX509 *creds, |
| 822 | Error **errp) |
| 823 | { |
| 824 | g_autoptr(QCryptoTLSCredsBox) box = NULL; |
| 825 | g_autoptr(QCryptoTLSCredsX509Files) files = NULL; |
| 826 | g_autofree char *cacrl = NULL; |
| 827 | g_autofree char *dhparams = NULL; |
| 828 | bool isServer = (creds->parent_obj.endpoint == |
| 829 | QCRYPTO_TLS_CREDS_ENDPOINT_SERVER); |
| 830 | int ret; |
| 831 | |
| 832 | if (!creds->parent_obj.dir) { |
| 833 | error_setg(errp, "Missing 'dir' property value"); |
| 834 | return -1; |
| 835 | } |
| 836 | |
| 837 | trace_qcrypto_tls_creds_x509_load(creds, creds->parent_obj.dir); |
| 838 | |
| 839 | if (creds->parent_obj.endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { |
| 840 | box = qcrypto_tls_creds_box_new_server(GNUTLS_CRD_CERTIFICATE); |
| 841 | } else { |
| 842 | box = qcrypto_tls_creds_box_new_client(GNUTLS_CRD_CERTIFICATE); |
| 843 | } |
| 844 | |
| 845 | ret = gnutls_certificate_allocate_credentials(&box->data.cert); |
| 846 | if (ret < 0) { |
| 847 | error_setg(errp, "Cannot allocate credentials: '%s'", |
| 848 | gnutls_strerror(ret)); |
| 849 | return -1; |
| 850 | } |
| 851 | |
| 852 | files = qcrypto_tls_creds_x509_files_new(); |
| 853 | |
| 854 | if (qcrypto_tls_creds_x509_load_ca(creds, box, files, isServer, errp) < 0) { |
| 855 | return -1; |
| 856 | } |
| 857 | |
| 858 | if (qcrypto_tls_creds_x509_load_identities(creds, box, files, |
| 859 | isServer, errp) < 0) { |
| 860 | return -1; |
| 861 | } |
| 862 | |
| 863 | if (isServer) { |
| 864 | if (qcrypto_tls_creds_get_path(&creds->parent_obj, |
| 865 | QCRYPTO_TLS_CREDS_X509_CA_CRL, |
| 866 | false, &cacrl, errp) < 0 || |
| 867 | qcrypto_tls_creds_get_path(&creds->parent_obj, |
| 868 | QCRYPTO_TLS_CREDS_DH_PARAMS, |
| 869 | false, &dhparams, errp) < 0) { |
| 870 | return -1; |
| 871 | } |
| 872 | } |
| 873 | |
| 874 | if (creds->sanityCheck && |
| 875 | qcrypto_tls_creds_x509_sanity_check(creds, files, isServer, errp) < 0) { |
| 876 | return -1; |
| 877 | } |
| 878 | |
| 879 | if (cacrl != NULL) { |
| 880 | ret = gnutls_certificate_set_x509_crl_file(box->data.cert, |
| 881 | cacrl, |
| 882 | GNUTLS_X509_FMT_PEM); |
| 883 | if (ret < 0) { |
| 884 | error_setg(errp, "Cannot load CRL '%s': %s", |
| 885 | cacrl, gnutls_strerror(ret)); |
| 886 | return -1; |
| 887 | } |
| 888 | } |
| 889 | |
| 890 | if (isServer) { |
| 891 | if (qcrypto_tls_creds_get_dh_params_file(&creds->parent_obj, dhparams, |
| 892 | &box->dh_params, |
| 893 | errp) < 0) { |
| 894 | return -1; |
| 895 | } |
| 896 | if (box->dh_params) { |
| 897 | gnutls_certificate_set_dh_params(box->data.cert, box->dh_params); |
| 898 | } |
| 899 | } |
| 900 | creds->parent_obj.box = g_steal_pointer(&box); |
| 901 | |
| 902 | return 0; |
| 903 | } |
| 904 | |
| 905 | |
| 906 | #else /* ! CONFIG_GNUTLS */ |
| 907 | |
| 908 | |
| 909 | static void |
| 910 | qcrypto_tls_creds_x509_load(QCryptoTLSCredsX509 *creds G_GNUC_UNUSED, |
| 911 | Error **errp) |
| 912 | { |
| 913 | error_setg(errp, "TLS credentials support requires GNUTLS"); |
| 914 | } |
| 915 | |
| 916 | |
| 917 | #endif /* ! CONFIG_GNUTLS */ |
| 918 | |
| 919 | |
| 920 | static void |
| 921 | qcrypto_tls_creds_x509_complete(UserCreatable *uc, Error **errp) |
| 922 | { |
| 923 | QCryptoTLSCredsX509 *creds = QCRYPTO_TLS_CREDS_X509(uc); |
| 924 | |
| 925 | qcrypto_tls_creds_x509_load(creds, errp); |
| 926 | } |
| 927 | |
| 928 | |
| 929 | static void |
| 930 | qcrypto_tls_creds_x509_prop_set_sanity(Object *obj, |
| 931 | bool value, |
| 932 | Error **errp G_GNUC_UNUSED) |
| 933 | { |
| 934 | QCryptoTLSCredsX509 *creds = QCRYPTO_TLS_CREDS_X509(obj); |
| 935 | |
| 936 | creds->sanityCheck = value; |
| 937 | } |
| 938 | |
| 939 | |
| 940 | static void |
| 941 | qcrypto_tls_creds_x509_prop_set_passwordid(Object *obj, |
| 942 | const char *value, |
| 943 | Error **errp G_GNUC_UNUSED) |
| 944 | { |
| 945 | QCryptoTLSCredsX509 *creds = QCRYPTO_TLS_CREDS_X509(obj); |
| 946 | |
| 947 | creds->passwordid = g_strdup(value); |
| 948 | } |
| 949 | |
| 950 | |
| 951 | static char * |
| 952 | qcrypto_tls_creds_x509_prop_get_passwordid(Object *obj, |
| 953 | Error **errp G_GNUC_UNUSED) |
| 954 | { |
| 955 | QCryptoTLSCredsX509 *creds = QCRYPTO_TLS_CREDS_X509(obj); |
| 956 | |
| 957 | return g_strdup(creds->passwordid); |
| 958 | } |
| 959 | |
| 960 | |
| 961 | static bool |
| 962 | qcrypto_tls_creds_x509_prop_get_sanity(Object *obj, |
| 963 | Error **errp G_GNUC_UNUSED) |
| 964 | { |
| 965 | QCryptoTLSCredsX509 *creds = QCRYPTO_TLS_CREDS_X509(obj); |
| 966 | |
| 967 | return creds->sanityCheck; |
| 968 | } |
| 969 | |
| 970 | |
| 971 | #ifdef CONFIG_GNUTLS |
| 972 | |
| 973 | |
| 974 | static bool |
| 975 | qcrypto_tls_creds_x509_reload(QCryptoTLSCreds *creds, Error **errp) |
| 976 | { |
| 977 | QCryptoTLSCredsX509 *x509_creds = QCRYPTO_TLS_CREDS_X509(creds); |
| 978 | Error *local_err = NULL; |
| 979 | QCryptoTLSCredsBox *creds_box = creds->box; |
| 980 | |
| 981 | creds->box = NULL; |
| 982 | qcrypto_tls_creds_x509_load(x509_creds, &local_err); |
| 983 | if (local_err) { |
| 984 | creds->box = creds_box; |
| 985 | error_propagate(errp, local_err); |
| 986 | return false; |
| 987 | } |
| 988 | |
| 989 | qcrypto_tls_creds_box_unref(creds_box); |
| 990 | return true; |
| 991 | } |
| 992 | |
| 993 | |
| 994 | #else /* ! CONFIG_GNUTLS */ |
| 995 | |
| 996 | |
| 997 | static bool |
| 998 | qcrypto_tls_creds_x509_reload(QCryptoTLSCreds *creds, Error **errp) |
| 999 | { |
| 1000 | return false; |
| 1001 | } |
| 1002 | |
| 1003 | |
| 1004 | #endif /* ! CONFIG_GNUTLS */ |
| 1005 | |
| 1006 | |
| 1007 | static void |
| 1008 | qcrypto_tls_creds_x509_init(Object *obj) |
| 1009 | { |
| 1010 | QCryptoTLSCredsX509 *creds = QCRYPTO_TLS_CREDS_X509(obj); |
| 1011 | |
| 1012 | creds->sanityCheck = true; |
| 1013 | } |
| 1014 | |
| 1015 | |
| 1016 | static void |
| 1017 | qcrypto_tls_creds_x509_finalize(Object *obj) |
| 1018 | { |
| 1019 | QCryptoTLSCredsX509 *creds = QCRYPTO_TLS_CREDS_X509(obj); |
| 1020 | |
| 1021 | g_free(creds->passwordid); |
| 1022 | } |
| 1023 | |
| 1024 | |
| 1025 | static void |
| 1026 | qcrypto_tls_creds_x509_class_init(ObjectClass *oc, const void *data) |
| 1027 | { |
| 1028 | UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc); |
| 1029 | QCryptoTLSCredsClass *ctcc = QCRYPTO_TLS_CREDS_CLASS(oc); |
| 1030 | |
| 1031 | ctcc->reload = qcrypto_tls_creds_x509_reload; |
| 1032 | |
| 1033 | ucc->complete = qcrypto_tls_creds_x509_complete; |
| 1034 | |
| 1035 | object_class_property_add_bool(oc, "sanity-check", |
| 1036 | qcrypto_tls_creds_x509_prop_get_sanity, |
| 1037 | qcrypto_tls_creds_x509_prop_set_sanity); |
| 1038 | object_class_property_add_str(oc, "passwordid", |
| 1039 | qcrypto_tls_creds_x509_prop_get_passwordid, |
| 1040 | qcrypto_tls_creds_x509_prop_set_passwordid); |
| 1041 | } |
| 1042 | |
| 1043 | |
| 1044 | static const TypeInfo qcrypto_tls_creds_x509_info = { |
| 1045 | .parent = TYPE_QCRYPTO_TLS_CREDS, |
| 1046 | .name = TYPE_QCRYPTO_TLS_CREDS_X509, |
| 1047 | .instance_size = sizeof(QCryptoTLSCredsX509), |
| 1048 | .instance_init = qcrypto_tls_creds_x509_init, |
| 1049 | .instance_finalize = qcrypto_tls_creds_x509_finalize, |
| 1050 | .class_size = sizeof(QCryptoTLSCredsX509Class), |
| 1051 | .class_init = qcrypto_tls_creds_x509_class_init, |
| 1052 | .interfaces = (const InterfaceInfo[]) { |
| 1053 | { TYPE_USER_CREATABLE }, |
| 1054 | { } |
| 1055 | } |
| 1056 | }; |
| 1057 | |
| 1058 | |
| 1059 | static void |
| 1060 | qcrypto_tls_creds_x509_register_types(void) |
| 1061 | { |
| 1062 | type_register_static(&qcrypto_tls_creds_x509_info); |
| 1063 | } |
| 1064 | |
| 1065 | |
| 1066 | type_init(qcrypto_tls_creds_x509_register_types); |