1 /* 2 * mod_nss - Network Security Services (NSS) support for lighttpd 3 * 4 * Copyright(c) 2020 Glenn Strauss gstrauss()gluelogic.com All rights reserved 5 * License: BSD 3-clause (same as lighttpd) 6 * 7 * Portions supporting mod_nss_ssl_conf_ciphersuites() (see end of file) 8 * Copyright 2001-2004 The Apache Software Foundation 9 */ 10 /* 11 * WARNING: EXPERIMENTAL code sketch; mod_nss is INCOMPLETE and UNTESTED 12 * 13 * NSS docs: https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS 14 * 15 * NSS documentation is seriously lacking and man pages exist only for apps; 16 * be prepared to slog through organic piles of NSS library code 17 * 18 * Note: If session tickets are -not- disabled with 19 * ssl.openssl.ssl-conf-cmd = ("Options" => "-SessionTicket") 20 * NSS never rotates server ticket encryption key (STEK) while running. 21 * Therefore, if session tickets are enabled, lighttpd server should be 22 * restarted (by an external job) at least every 24 hours. Restarting 23 * lighttpd generates a new key that is shared by lighttpd workers. There 24 * is no mechanism implemented in lighttpd mod_nss to share STEK between 25 * independent lighttpd servers. ssl.stek-file is not used in mod_nss. 26 * 27 * NSS provides SSL_SetSessionTicketKeyPair(pubKey, privKey) to set RSA keys. 28 * However, to match behavior of other lighttpd TLS modules, it seems we want 29 * to set the private struct ssl_self_encrypt_keys in lib/ssl/sslsnce.c 30 * instead of the private struct ssl_self_encrypt_key_pair. 31 * sslSelfEncryptKeys ssl_self_encrypt_keys contains: 32 * PRUint8 keyName[SELF_ENCRYPT_KEY_NAME_LEN]; 33 * PK11SymKey *encKey; 34 * PK11SymKey *macKey; 35 * (see lib/ssl/sslsnce.c:GenerateSelfEncryptKeys()) 36 * PK11SymKey *masterSecret in ssl3CipherSpec in ssl3State in sslSessionID 37 * is private in lib/ssl/ssl3con.c 38 * 39 * XXX: due to limitations, consider disabling session tickets in mod_nss 40 * 41 * not implemented: 42 * - session ticket rotation (see comments above) 43 * - OCSP Must Staple detection 44 * - ssl.honor-cipher-order 45 * - ssl.verifyclient.depth 46 * - ssl.dh-file 47 * - ssl.ec-curve 48 * - ssl.openssl.ssl-conf-cmd Ciphersuite 49 * 50 * future: 51 * - consider SSL_AlertReceivedCallback() to set SSLAlertCallback 52 * in order to (optionally) log alerts, and to abort connection if fatal alert 53 * - consider using experimental API for cipher suite choice in lib/ssl/sslexp.h 54 * SSL_CipherSuiteOrderGet 55 * SSL_CipherSuiteOrderSet 56 * - detect CLOSE_NOTIFY from client 57 * - feature options 58 * - SSL_ENABLE_FALSE_START 59 * - SSL_ENABLE_DELEGATED_CREDENTIALS 60 * - SSL_ENABLE_0RTT_DATA 61 * - SSL_SUPPRESS_END_OF_EARLY_DATA 62 * - crypto option using FreeBL 63 * "A core element of NSS is FreeBL, a base library providing hash functions, 64 * big number calculations, and cryptographic algorithms." 65 * "Softoken is an NSS module that exposes most FreeBL functionality as a 66 * PKCS#11 module." 67 * "PR_GetRandomNoise - Produces a random value for use as a seed value for 68 * another random number generator." 69 */ 70 #include "first.h" 71 72 #include <sys/types.h> 73 #include <sys/stat.h> 74 #include <errno.h> 75 #include <fcntl.h> 76 #include <stdarg.h> 77 #include <stdlib.h> 78 #include <stdio.h> /* vsnprintf() */ 79 #include <string.h> 80 81 #ifdef __has_include 82 #if __has_include(<nss3/nss.h>) 83 #define NSS_VER_INCLUDE 84 #endif 85 #endif 86 87 #ifndef NSS_VER_INCLUDE 88 #include <nspr/nspr.h> 89 #include <nspr/private/pprio.h> /* see mod_nss_io_ctor() comments */ 90 #include <nss/nss.h> 91 #include <nss/nssb64.h> 92 #include <nss/keyhi.h> 93 #include <nss/pk11pub.h> 94 #include <nss/secder.h> 95 #include <nss/secerr.h> 96 #include <nss/ssl.h> 97 #include <nss/sslproto.h> 98 #else 99 #include <nspr4/nspr.h> 100 #include <nspr4/private/pprio.h> /* see mod_nss_io_ctor() comments */ 101 #include <nss3/nss.h> 102 #include <nss3/nssb64.h> 103 #include <nss3/keyhi.h> 104 #include <nss3/pk11pub.h> 105 #include <nss3/secder.h> 106 #include <nss3/secerr.h> 107 #include <nss3/ssl.h> 108 #include <nss3/sslproto.h> 109 #endif 110 111 #include "base.h" 112 #include "fdevent.h" 113 #include "http_header.h" 114 #include "http_kv.h" 115 #include "log.h" 116 #include "plugin.h" 117 #include "safe_memclear.h" 118 119 typedef struct { 120 /* SNI per host: with COMP_SERVER_SOCKET, COMP_HTTP_SCHEME, COMP_HTTP_HOST */ 121 char must_staple; 122 CERTCertificate *ssl_pemfile_x509; 123 SECKEYPrivateKey *ssl_pemfile_pkey; 124 SSLExtraServerCertData ssl_credex; 125 const buffer *ssl_stapling_file; 126 time_t ssl_stapling_loadts; 127 time_t ssl_stapling_nextts; 128 SECItemArray OCSPResponses; 129 SECItem OCSPResponse; 130 } plugin_cert; 131 132 typedef struct { 133 PRFileDesc *model; 134 SSLVersionRange protos; 135 PRBool ssl_compression; 136 int8_t ssl_session_ticket; 137 } plugin_ssl_ctx; 138 139 typedef struct { 140 plugin_cert *pc; 141 142 /*(used only during startup; not patched)*/ 143 unsigned char ssl_enabled; /* only interesting for setting up listening sockets. don't use at runtime */ 144 unsigned char ssl_honor_cipher_order; /* determine SSL cipher in server-preferred order, not client-order */ 145 unsigned char ssl_empty_fragments; 146 unsigned char ssl_use_sslv2; 147 unsigned char ssl_use_sslv3; 148 const buffer *ssl_cipher_list; 149 const buffer *ssl_ec_curve; 150 array *ssl_conf_cmd; 151 152 /*(copied from plugin_data for socket ssl_ctx config)*/ 153 unsigned char ssl_session_ticket; 154 unsigned char ssl_verifyclient; 155 unsigned char ssl_verifyclient_enforce; 156 unsigned char ssl_verifyclient_depth; 157 158 PRFileDesc *model; 159 SSLVersionRange protos; 160 PRBool ssl_compression; 161 } plugin_config_socket; /*(used at startup during configuration)*/ 162 163 typedef struct { 164 /* SNI per host: w/ COMP_SERVER_SOCKET, COMP_HTTP_SCHEME, COMP_HTTP_HOST */ 165 plugin_cert *pc; 166 CERTCertList *ssl_ca_file; 167 CERTCertList *ssl_ca_dn_file; 168 169 unsigned char ssl_verifyclient; 170 unsigned char ssl_verifyclient_enforce; 171 unsigned char ssl_verifyclient_depth; 172 unsigned char ssl_verifyclient_export_cert; 173 unsigned char ssl_read_ahead; 174 unsigned char ssl_log_noise; 175 unsigned char ssl_disable_client_renegotiation; 176 const buffer *ssl_verifyclient_username; 177 const buffer *ssl_acme_tls_1; 178 } plugin_config; 179 180 typedef struct { 181 PLUGIN_DATA; 182 plugin_ssl_ctx *ssl_ctxs; 183 plugin_config defaults; 184 server *srv; 185 } plugin_data; 186 187 static int ssl_is_init; 188 /* need assigned p->id for deep access of module handler_ctx for connection 189 * i.e. handler_ctx *hctx = con->plugin_ctx[plugin_data_singleton->id]; */ 190 static plugin_data *plugin_data_singleton; 191 #define LOCAL_SEND_BUFSIZE 16384 /* DEFAULT_MAX_RECORD_SIZE */ 192 static char *local_send_buffer; 193 194 typedef struct { 195 PRFileDesc *ssl; 196 request_st *r; 197 connection *con; 198 int8_t close_notify; 199 uint8_t alpn; 200 int8_t ssl_session_ticket; 201 int handshake; 202 size_t pending_write; 203 plugin_config conf; 204 int verify_status; 205 buffer *tmp_buf; 206 log_error_st *errh; 207 } handler_ctx; 208 209 210 static handler_ctx * 211 handler_ctx_init (void) 212 { 213 handler_ctx *hctx = calloc(1, sizeof(*hctx)); 214 force_assert(hctx); 215 return hctx; 216 } 217 218 219 static void mod_nss_io_dtor (PRFileDesc *ssl); 220 221 static void 222 handler_ctx_free (handler_ctx *hctx) 223 { 224 mod_nss_io_dtor(hctx->ssl); 225 free(hctx); 226 } 227 228 229 __attribute_cold__ 230 static void elog(log_error_st * const errh, 231 const char * const file, const int line, 232 const char * const msg) 233 { 234 /* error logging convenience function that decodes NSS result codes */ 235 const PRErrorCode rc = PR_GetError(); 236 const char *s = PR_ErrorToName(rc); 237 log_error(errh, file, line, "NSS: %s: (%s) %s", 238 msg, s ? s : "", PR_ErrorToString(rc, 0)); 239 } 240 241 242 __attribute_cold__ 243 __attribute_format__((__printf__, 4, 5)) 244 static void elogf(log_error_st * const errh, 245 const char * const file, const int line, 246 const char * const fmt, ...) 247 { 248 char msg[1024]; 249 va_list ap; 250 va_start(ap, fmt); 251 vsnprintf(msg, sizeof(msg), fmt, ap); 252 va_end(ap); 253 elog(errh, file, line, msg); 254 } 255 256 257 static PRFileDesc * 258 mod_nss_io_ctor (int fd, PRFileDesc *model, log_error_st *errh) 259 { 260 /* WTH? Why not a public PR_ImportTCPSocket() interface from NSPR? 261 * (and PR_GetInheritedFD() is not a great replacement interface to 262 * fudge NSPR_INHERIT_FDS in environment for each connection) 263 * 264 * #include <nspr4/private/pprio.h> 265 * Use internal routines to set up PRFileDesc. Perform actions underlying 266 * PR_ImportTCPSocket() to avoid excess work done by PR_ImportTCPSocket(), 267 * which includes closing the fd if there is a failure. Could pass 0 as fd 268 * to PR_AllocFileDesc() to avoid NSPR setting O_NONBLOCK since already set. 269 * Instead, employ simpler PR_CreateSocketPollFd() and change methods table, 270 * which handles _PR_ImplicitInitialization() (PR_AllocFileDesc() does not). 271 * (WTH?: PR_AllocFileDesc() has limit fd < FD_SETSIZE when XP_UNIX defined) 272 * Note: since bypassing PR_ImportTCPSocket() this might not work on Windows 273 * which expects prfd->secret->af to be set to AF_INET. 274 */ 275 #if defined(_WIN32) && !defined(__CYGWIN__) 276 PRFileDesc *prfd = PR_ImportTCPSocket(fd); 277 if (NULL == prfd) { 278 elog(errh, __FILE__, __LINE__, "PR_ImportTCPSocket()"); 279 return NULL; 280 } 281 #else 282 /*PRFileDesc *prfd = PR_AllocFileDesc(0, PR_GetTCPMethods());*/ 283 PRFileDesc *prfd = PR_CreateSocketPollFd(fd); 284 if (NULL == prfd) { 285 elog(errh, __FILE__, __LINE__, "PR_CreateSocketPollFd()"); 286 return NULL; 287 } 288 /*PR_ChangeFileDescNativeHandle(prfd, fd);*/ 289 prfd->methods = PR_GetTCPMethods(); 290 /*prfd->dtor = PR_FreeFileDesc();*/ /* PR_FreeFileDesc() is private */ 291 #endif 292 293 /* set prfd->secret->nonblocking flag */ 294 PRSocketOptionData data; 295 data.option = PR_SockOpt_Nonblocking; 296 data.value.non_blocking = PR_TRUE; 297 if (PR_SetSocketOption(prfd, &data) != PR_SUCCESS) { 298 elog(errh, __FILE__, __LINE__, "PR_SocketSetSocketOption()"); 299 PR_DestroySocketPollFd(prfd); /* PR_FreeFileDesc() is private */ 300 return NULL; 301 } 302 303 PRFileDesc *ssl = SSL_ImportFD(model, prfd); 304 if (NULL == ssl) { 305 elog(errh, __FILE__, __LINE__, "SSL_ImportFD()"); 306 PR_DestroySocketPollFd(prfd); /* PR_FreeFileDesc() is private */ 307 return NULL; 308 } 309 310 return ssl; 311 } 312 313 314 static void 315 mod_nss_io_detach (PRFileDesc *ssl) 316 { 317 #if 0 /* PR_PopIOLayer() forbids pop of PR_NSPR_IO_LAYER */ 318 PRFileDesc *prfd = PR_PopIOLayer(ssl, PR_NSPR_IO_LAYER); 319 if (prfd) { 320 PR_ChangeFileDescNativeHandle(prfd, -1); 321 PR_DestroySocketPollFd(prfd); /* PR_FreeFileDesc() is private */ 322 } 323 #else 324 /*(results in close(-1) and EBADF from PR_Close() in mod_nss_io_dtor())*/ 325 PRFileDesc *prfd = PR_GetIdentitiesLayer(ssl, PR_NSPR_IO_LAYER); 326 if (prfd) 327 PR_ChangeFileDescNativeHandle(prfd, -1); 328 #endif 329 } 330 331 332 static void 333 mod_nss_io_dtor (PRFileDesc *ssl) 334 { 335 if (NULL == ssl) return; 336 mod_nss_io_detach(ssl); 337 PR_Close(ssl); 338 } 339 340 341 static int 342 mod_nss_load_file (const char * const fn, SECItem * const d, log_error_st *errh) 343 { 344 off_t dlen = 512*1024*1024;/*(arbitrary limit: 512 MB file; expect < 1 MB)*/ 345 char *data = fdevent_load_file(fn, &dlen, errh, PORT_Alloc, PORT_Free); 346 if (NULL == data) return -1; 347 d->type = siBuffer; 348 d->data = (unsigned char *)data; 349 d->len = (unsigned int)dlen; 350 return 0; 351 } 352 353 354 static void 355 mod_nss_secitem_wipe (SECItem * const d) 356 { 357 /* safer than SECITEM_ZfreeItem() */ 358 if (NULL == d) return; 359 if (d->data) { 360 if (d->len) safe_memclear(d->data, d->len); /*safer than PORT_Memset()*/ 361 PORT_Free(d->data); /* safe_memclear() is safer than PORT_ZFree() */ 362 d->data = NULL; 363 } 364 d->len = 0; 365 } 366 367 368 INIT_FUNC(mod_nss_init) 369 { 370 plugin_data_singleton = (plugin_data *)calloc(1, sizeof(plugin_data)); 371 return plugin_data_singleton; 372 } 373 374 375 static int mod_nss_init_once_nss (void) 376 { 377 if (ssl_is_init) return 1; 378 ssl_is_init = 1; 379 380 /*PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 0);*//*implicit on first use*/ 381 382 if (!NSS_IsInitialized() && NSS_NoDB_Init(NULL) < 0) 383 return 0; 384 385 if (SSL_OptionSetDefault(SSL_ENABLE_SSL2, PR_FALSE) < 0) 386 return 0; 387 if (SSL_OptionSetDefault(SSL_ENABLE_SSL3, PR_FALSE) < 0) 388 return 0; 389 /* XXX: lighttpd is single threaded and so SSL_NO_LOCKS is desirable, 390 * but NSS crashes if SSL_NO_LOCKS option is set to PR_TRUE. 391 * (Crash in SSL3_SendAlert() call to PR_GetMonitorEntryCount() 392 * with NULL ptr to monitor (mon)) 393 * NSS lib/ssl/sslimpl.h macros such as ssl_HaveSSL3HandshakeLock(ss), 394 * plus some other .c files use macros without first checking if 395 * (!ss->opt.noLocks): PZ_InMonitor() PZ_InMonitor() PZ_InMonitor() */ 396 /*if (SSL_OptionSetDefault(SSL_NO_LOCKS, PR_TRUE) < 0)*/ 397 if (SSL_OptionSetDefault(SSL_NO_LOCKS, PR_FALSE) < 0) 398 return 0; 399 if (SSL_OptionSetDefault(SSL_NO_CACHE, PR_TRUE) < 0) 400 return 0; 401 if (SSL_OptionSetDefault(SSL_ENABLE_SESSION_TICKETS, PR_TRUE) < 0) 402 return 0; 403 if (SSL_OptionSetDefault(SSL_ENABLE_ALPN, PR_TRUE) < 0) 404 return 0; 405 if (SSL_OptionSetDefault(SSL_ENABLE_RENEGOTIATION, 406 SSL_RENEGOTIATE_NEVER) < 0) 407 return 0; 408 409 if (NSS_SetDomesticPolicy() < 0) 410 return 0; 411 412 local_send_buffer = malloc(LOCAL_SEND_BUFSIZE); 413 force_assert(NULL != local_send_buffer); 414 415 return 1; 416 } 417 418 419 static void mod_nss_free_nss (void) 420 { 421 if (!ssl_is_init) return; 422 423 NSS_Shutdown(); 424 425 free(local_send_buffer); 426 ssl_is_init = 0; 427 } 428 429 430 #define PEM_BEGIN "-----BEGIN " 431 #define PEM_END "-----END " 432 #define PEM_BEGIN_CERT "-----BEGIN CERTIFICATE-----" 433 #define PEM_END_CERT "-----END CERTIFICATE-----" 434 #define PEM_BEGIN_TRUSTED_CERT "-----BEGIN TRUSTED CERTIFICATE-----" 435 #define PEM_END_TRUSTED_CERT "-----END TRUSTED CERTIFICATE-----" 436 #define PEM_BEGIN_PKEY "-----BEGIN PRIVATE KEY-----" 437 #define PEM_END_PKEY "-----END PRIVATE KEY-----" 438 #define PEM_BEGIN_EC_PKEY "-----BEGIN EC PRIVATE KEY-----" 439 #define PEM_END_EC_PKEY "-----END EC PRIVATE KEY-----" 440 #define PEM_BEGIN_RSA_PKEY "-----BEGIN RSA PRIVATE KEY-----" 441 #define PEM_END_RSA_PKEY "-----END RSA PRIVATE KEY-----" 442 #define PEM_BEGIN_DSA_PKEY "-----BEGIN DSA PRIVATE KEY-----" 443 #define PEM_END_DSA_PKEY "-----END DSA PRIVATE KEY-----" 444 #define PEM_BEGIN_ANY_PKEY "-----BEGIN ANY PRIVATE KEY-----" 445 #define PEM_END_ANY_PKEY "-----END ANY PRIVATE KEY-----" 446 /* (not implemented: support to get password from user for encrypted key) */ 447 #define PEM_BEGIN_ENCRYPTED_PKEY "-----BEGIN ENCRYPTED PRIVATE KEY-----" 448 #define PEM_END_ENCRYPTED_PKEY "-----END ENCRYPTED PRIVATE KEY-----" 449 450 #define PEM_BEGIN_X509_CRL "-----BEGIN X509 CRL-----" 451 #define PEM_END_X509_CRL "-----END X509 CRL-----" 452 453 454 static CERTCertificateList * 455 mod_nss_load_pem_file (const char *fn, log_error_st *errh) 456 { 457 if (!mod_nss_init_once_nss()) return NULL; 458 459 SECItem f; 460 int rc = mod_nss_load_file(fn, &f, errh); 461 if (rc < 0) return NULL; 462 463 rc = -1; 464 CERTCertificateList *chain = NULL; 465 do { 466 int count = 0; 467 char *b = (char *)f.data; 468 for (; (b = strstr(b, PEM_BEGIN_CERT)); b += sizeof(PEM_BEGIN_CERT)-1) 469 ++count; 470 b = (char *)f.data; 471 for (; (b = strstr(b, PEM_BEGIN_TRUSTED_CERT)); 472 b += sizeof(PEM_BEGIN_TRUSTED_CERT)-1) 473 ++count; 474 if (0 == count) { 475 rc = 0; 476 break; 477 } 478 479 PLArenaPool *arena = PORT_NewArena(4096); 480 if (NULL == arena) 481 break; 482 483 chain = (CERTCertificateList *) 484 PORT_ArenaAlloc(arena, sizeof(CERTCertificateList)); 485 if (NULL == chain) { 486 PORT_FreeArena(arena, PR_FALSE); 487 break; 488 } 489 490 chain->arena = arena; 491 chain->len = count; 492 chain->certs = (SECItem *)PORT_ArenaAlloc(arena, count*sizeof(SECItem)); 493 if (NULL == chain->certs) 494 break; 495 496 int i = 0; 497 for (char *e = (char *)f.data; (b = strstr(e, PEM_BEGIN_CERT)); ++i) { 498 b += sizeof(PEM_BEGIN_CERT)-1; 499 if (*b == '\r') ++b; 500 if (*b == '\n') ++b; 501 e = strstr(b, PEM_END_CERT); 502 if (NULL == e) break; 503 uint32_t len = (uint32_t)(e - b); 504 e += sizeof(PEM_END_CERT)-1; 505 chain->certs[i].type = 0; 506 chain->certs[i].data = NULL; 507 chain->certs[i].len = 0; 508 if (NULL == NSSBase64_DecodeBuffer(arena, chain->certs+i, b, len)) 509 break; 510 } 511 for (char *e=(char *)f.data; (b=strstr(e,PEM_BEGIN_TRUSTED_CERT)); ++i){ 512 b += sizeof(PEM_BEGIN_TRUSTED_CERT)-1; 513 if (*b == '\r') ++b; 514 if (*b == '\n') ++b; 515 e = strstr(b, PEM_END_TRUSTED_CERT); 516 if (NULL == e) break; 517 uint32_t len = (uint32_t)(e - b); 518 e += sizeof(PEM_END_TRUSTED_CERT)-1; 519 chain->certs[i].type = 0; 520 chain->certs[i].data = NULL; 521 chain->certs[i].len = 0; 522 if (NULL == NSSBase64_DecodeBuffer(arena, chain->certs+i, b, len)) 523 break; 524 } 525 if (i == count) 526 rc = 0; 527 else 528 PORT_SetError(SEC_ERROR_IO); 529 } while (0); 530 531 mod_nss_secitem_wipe(&f); 532 533 if (rc < 0) { 534 elogf(errh, __FILE__, __LINE__, "error loading %s", fn); 535 if (chain) 536 CERT_DestroyCertificateList(chain); 537 return NULL; 538 } 539 540 return chain; 541 } 542 543 544 static CERTCertificate * 545 mod_nss_load_pem_crts (const char *fn, log_error_st *errh, CERTCertificateList **pchain) 546 { 547 *pchain = mod_nss_load_pem_file(fn, errh); 548 if (NULL == *pchain) return NULL; 549 550 CERTCertificate *cert = CERT_NewTempCertificate(NULL, (*pchain)->certs+0, 551 NULL, PR_FALSE, PR_TRUE); 552 if (NULL == cert) { 553 CERT_DestroyCertificateList(*pchain); 554 *pchain = NULL; 555 } 556 return cert; 557 } 558 559 static CERTCertList * 560 mod_nss_cert_list (CERTCertificateList *crts) 561 { 562 SECStatus rc = SECFailure; 563 CERTCertificate *cert = NULL; 564 CERTCertList *clist = CERT_NewCertList(); 565 if (NULL != clist) { 566 for (int i = 0; i < crts->len; ++i) { 567 cert = CERT_NewTempCertificate(NULL, crts->certs+i, 568 NULL, PR_FALSE, PR_TRUE); 569 if (NULL == cert) break; 570 rc = CERT_AddCertToListTail(clist, cert); 571 if (rc < 0) break; 572 } 573 } 574 575 if (rc < 0 || NULL == cert) { 576 if (cert) CERT_DestroyCertificate(cert); 577 if (clist) CERT_DestroyCertList(clist); 578 PORT_SetError(SEC_ERROR_NO_MEMORY); 579 return NULL; 580 } 581 582 return clist; 583 } 584 585 586 static CERTCertList * 587 mod_nss_load_config_crts (const char *fn, log_error_st *errh) 588 { 589 CERTCertificateList *crts = mod_nss_load_pem_file(fn, errh); 590 if (NULL == crts) return NULL; 591 592 CERTCertList *clist = NULL; 593 SECStatus rc = 594 CERT_ImportCAChainTrusted(crts->certs,crts->len,certUsageUserCertImport); 595 if (rc == SECSuccess) 596 clist = mod_nss_cert_list(crts); 597 else { 598 elogf(errh, __FILE__, __LINE__, "CERT_ImportCAChainTrusted() %s", fn); 599 CERT_DestroyCertificateList(crts); 600 return NULL; 601 } 602 603 CERT_DestroyCertificateList(crts); 604 return clist; 605 } 606 607 608 static CERTCertList * 609 mod_nss_load_config_dncrts (const char *fn, log_error_st *errh) 610 { 611 CERTCertificateList *crts = mod_nss_load_pem_file(fn, errh); 612 if (NULL == crts) return NULL; 613 614 CERTCertList *clist = mod_nss_cert_list(crts); 615 616 CERT_DestroyCertificateList(crts); 617 return clist; 618 } 619 620 621 static void 622 mod_nss_free_config_crls (CERTCertificateList *crls) 623 { 624 if (NULL == crls) return; 625 CERTCertDBHandle * const dbhandle = CERT_GetDefaultCertDB(); 626 for (int i = 0; i < crls->len; ++i) 627 CERT_UncacheCRL(dbhandle, crls->certs+i); 628 CERT_DestroyCertificateList(crls); 629 } 630 631 632 static CERTCertificateList * 633 mod_nss_load_config_crls (const char *fn, log_error_st *errh) 634 { 635 /*(similar start to other mod_nss_load_config_*())*/ 636 if (!mod_nss_init_once_nss()) return NULL; 637 638 SECItem f; 639 int rc = mod_nss_load_file(fn, &f, errh); 640 if (rc < 0) return NULL; 641 642 rc = -1; 643 CERTCertificateList *chain = NULL; 644 CERTCertDBHandle * const dbhandle = CERT_GetDefaultCertDB(); 645 do { 646 int count = 0; 647 char *b = (char *)f.data; 648 for (; (b = strstr(b, PEM_BEGIN_X509_CRL)); 649 b += sizeof(PEM_BEGIN_X509_CRL)-1) 650 ++count; 651 if (0 == count) { 652 rc = 0; 653 break; 654 } 655 656 PLArenaPool *arena = PORT_NewArena(4096); 657 if (NULL == arena) 658 break; 659 660 chain = (CERTCertificateList *) 661 PORT_ArenaAlloc(arena, sizeof(CERTCertificateList)); 662 if (NULL == chain) { 663 PORT_FreeArena(arena, PR_FALSE); 664 break; 665 } 666 667 chain->arena = arena; 668 chain->len = count; 669 chain->certs = (SECItem *)PORT_ArenaAlloc(arena, count*sizeof(SECItem)); 670 if (NULL == chain->certs) 671 break; 672 673 int i = 0; 674 for (char *e = (char *)f.data; (b = strstr(e,PEM_BEGIN_X509_CRL)); ++i){ 675 b += sizeof(PEM_BEGIN_X509_CRL)-1; 676 if (*b == '\r') ++b; 677 if (*b == '\n') ++b; 678 e = strstr(b, PEM_END_X509_CRL); 679 if (NULL == e) break; 680 uint32_t len = (uint32_t)(e - b); 681 e += sizeof(PEM_END_X509_CRL)-1; 682 chain->certs[i].type = 0; 683 chain->certs[i].data = NULL; 684 chain->certs[i].len = 0; 685 if (NULL == NSSBase64_DecodeBuffer(arena, chain->certs+i, b, len)) 686 break; 687 /* using ephemeral db, so cache CRL instead of CERT_ImportCRL() */ 688 if (CERT_CacheCRL(dbhandle, chain->certs+i) < 0) 689 break; 690 } 691 if (i == count) 692 rc = 0; 693 else 694 PORT_SetError(SEC_ERROR_IO); 695 } while (0); 696 697 mod_nss_secitem_wipe(&f); 698 699 if (rc < 0) { 700 elogf(errh, __FILE__, __LINE__, "error loading %s", fn); 701 if (chain) 702 CERT_DestroyCertificateList(chain); 703 return NULL; 704 } 705 706 return chain; 707 } 708 709 710 static SECItem * 711 mod_nss_cert_get_publicValue (SECKEYPublicKey *pubKey) 712 { 713 /*(lib/pkcs12/p12d.c:sec_pkcs12_get_public_value_and_type() private)*/ 714 /*(lib/pk11wrap/pk11akey.c:pk11_MakeIDFromPublicKey() private, hashes)*/ 715 /*(lib/crmf/crmfcont.c:crmf_get_public_value() public but incomplete)*/ 716 switch (pubKey->keyType) { 717 case dsaKey: return &pubKey->u.dsa.publicValue; 718 case dhKey: return &pubKey->u.dh.publicValue; 719 case rsaKey: return &pubKey->u.rsa.modulus; 720 case ecKey: return &pubKey->u.ec.publicValue; 721 default: return NULL; 722 } 723 } 724 725 726 static SECKEYPrivateKey * 727 mod_nss_load_config_pkey (const char *fn, CERTCertificate *cert, log_error_st *errh) 728 { 729 /* NSS does not provide convenient mechanisms to read PEM or DER private key 730 * instead expecting PKCS12-format, which is not the convention used by many 731 * other TLS modules */ 732 733 /*(similar start to other mod_nss_load_config_*())*/ 734 if (!mod_nss_init_once_nss()) return NULL; 735 736 SECItem f; 737 int rc = mod_nss_load_file(fn, &f, errh); 738 if (rc < 0) return NULL; 739 740 SECItem der = { 0, NULL, 0 }; 741 PK11SlotInfo *slot = NULL; 742 SECKEYPrivateKey *pkey = NULL; 743 SECStatus src = SECFailure; 744 do { 745 /*(expecting single private key in file, so first match)*/ 746 char *b, *e; 747 if ((b = strstr((char *)f.data, PEM_BEGIN_PKEY)) 748 && (e = strstr(b, PEM_END_PKEY))) 749 b += sizeof(PEM_BEGIN_PKEY)-1; 750 else if ((b = strstr((char *)f.data, PEM_BEGIN_EC_PKEY)) 751 && (e = strstr(b, PEM_END_EC_PKEY))) 752 b += sizeof(PEM_BEGIN_EC_PKEY)-1; 753 else if ((b = strstr((char *)f.data, PEM_BEGIN_RSA_PKEY)) 754 && (e = strstr(b, PEM_END_RSA_PKEY))) 755 b += sizeof(PEM_BEGIN_RSA_PKEY)-1; 756 else if ((b = strstr((char *)f.data, PEM_BEGIN_DSA_PKEY)) 757 && (e = strstr(b, PEM_END_DSA_PKEY))) 758 b += sizeof(PEM_BEGIN_DSA_PKEY)-1; 759 else if ((b = strstr((char *)f.data, PEM_BEGIN_ANY_PKEY)) 760 && (e = strstr(b, PEM_END_ANY_PKEY))) 761 b += sizeof(PEM_BEGIN_ANY_PKEY)-1; 762 else 763 break; 764 if (*b == '\r') ++b; 765 if (*b == '\n') ++b; 766 767 if (NULL == NSSBase64_DecodeBuffer(NULL, &der, b, (uint32_t)(e - b))) 768 break; 769 770 slot = PK11_GetInternalKeySlot(); 771 if (NULL == slot) break; 772 773 SECItem nickname = { 0, NULL, strlen(fn) }; 774 *(const unsigned char **)&nickname.data = (unsigned char *)fn; 775 unsigned int keyUsage = KU_ALL; /* XXX: limit to fewer flags? */ 776 PRBool isPerm = PR_FALSE; 777 PRBool isPrivate = PR_TRUE; 778 SECKEYPublicKey *pubKey = CERT_ExtractPublicKey(cert); 779 SECItem *pubValue = mod_nss_cert_get_publicValue(pubKey); 780 src = 781 PK11_ImportDERPrivateKeyInfoAndReturnKey(slot, &der, &nickname, 782 pubValue, isPerm, isPrivate, 783 keyUsage, &pkey, NULL); 784 /* nickname attribute has reference taken to data; 785 * data must persist longer than SECKEYPrivateKey */ 786 /* (pubValue data is of decoded type SEC_ASN1_INTEGER and is copied) */ 787 SECKEY_DestroyPublicKey(pubKey); 788 } while (0); 789 790 if (slot) PK11_FreeSlot(slot); 791 if (der.data) { 792 mod_nss_secitem_wipe(&der); 793 PORT_Free(der.data); 794 } 795 mod_nss_secitem_wipe(&f); 796 797 if (src < 0) { 798 elogf(errh, __FILE__, __LINE__, 799 "PK11_ImportDERPrivateKeyInfoAndReturnKey() %s", fn); 800 return NULL; 801 } 802 803 return pkey; 804 } 805 806 807 static void 808 mod_nss_free_config (server *srv, plugin_data * const p) 809 { 810 if (NULL != p->ssl_ctxs) { 811 PRFileDesc *global_model = p->ssl_ctxs->model; 812 /* free from $SERVER["socket"] (if not copy of global scope) */ 813 for (uint32_t i = 1; i < srv->config_context->used; ++i) { 814 plugin_ssl_ctx * const s = p->ssl_ctxs + i; 815 if (s->model && s->model != global_model) 816 PR_Close(s->model); 817 } 818 /* free from global scope */ 819 if (global_model) 820 PR_Close(global_model); 821 free(p->ssl_ctxs); 822 } 823 824 if (NULL == p->cvlist) return; 825 /* (init i to 0 if global context; to 1 to skip empty global context) */ 826 for (int i = !p->cvlist[0].v.u2[1], used = p->nconfig; i < used; ++i) { 827 config_plugin_value_t *cpv = p->cvlist + p->cvlist[i].v.u2[0]; 828 for (; -1 != cpv->k_id; ++cpv) { 829 switch (cpv->k_id) { 830 case 0: /* ssl.pemfile */ 831 if (cpv->vtype == T_CONFIG_LOCAL) { 832 plugin_cert *pc = cpv->v.v; 833 CERT_DestroyCertificate(pc->ssl_pemfile_x509); 834 SECKEY_DestroyPrivateKey(pc->ssl_pemfile_pkey); 835 CERTCertificateList *certChain; 836 *(const CERTCertificateList **)&certChain = 837 pc->ssl_credex.certChain; 838 CERT_DestroyCertificateList(certChain); 839 PORT_Free(pc->OCSPResponse.data); 840 //CERT_Destroy...(pc->ssl_credex.signedCertTimestamps); 841 //CERT_Destroy...(pc->ssl_credex.delegCred); 842 //CERT_Destroy...(pc->ssl_credex.delegCredPrivKey); 843 free(pc); 844 } 845 break; 846 case 2: /* ssl.ca-file */ 847 case 3: /* ssl.ca-dn-file */ 848 if (cpv->vtype == T_CONFIG_LOCAL) 849 CERT_DestroyCertList(cpv->v.v); 850 break; 851 case 4: /* ssl.ca-crl-file */ 852 if (cpv->vtype == T_CONFIG_LOCAL) 853 mod_nss_free_config_crls(cpv->v.v); 854 break; 855 default: 856 break; 857 } 858 } 859 } 860 } 861 862 863 FREE_FUNC(mod_nss_free) 864 { 865 plugin_data *p = p_d; 866 if (NULL == p->srv) return; 867 mod_nss_free_config(p->srv, p); 868 mod_nss_free_nss(); 869 } 870 871 872 static void 873 mod_nss_merge_config_cpv (plugin_config * const pconf, const config_plugin_value_t * const cpv) 874 { 875 switch (cpv->k_id) { /* index into static config_plugin_keys_t cpk[] */ 876 case 0: /* ssl.pemfile */ 877 if (cpv->vtype == T_CONFIG_LOCAL) 878 pconf->pc = cpv->v.v; 879 break; 880 case 1: /* ssl.privkey */ 881 break; 882 case 2: /* ssl.ca-file */ 883 if (cpv->vtype == T_CONFIG_LOCAL) 884 pconf->ssl_ca_file = cpv->v.v; 885 break; 886 case 3: /* ssl.ca-dn-file */ 887 if (cpv->vtype == T_CONFIG_LOCAL) 888 pconf->ssl_ca_dn_file = cpv->v.v; 889 break; 890 case 4: /* ssl.ca-crl-file */ 891 break; 892 case 5: /* ssl.read-ahead */ 893 pconf->ssl_read_ahead = (0 != cpv->v.u); 894 break; 895 case 6: /* ssl.disable-client-renegotiation */ 896 pconf->ssl_disable_client_renegotiation = (0 != cpv->v.u); 897 break; 898 case 7: /* ssl.verifyclient.activate */ 899 pconf->ssl_verifyclient = (0 != cpv->v.u); 900 break; 901 case 8: /* ssl.verifyclient.enforce */ 902 pconf->ssl_verifyclient_enforce = (0 != cpv->v.u); 903 break; 904 case 9: /* ssl.verifyclient.depth */ 905 pconf->ssl_verifyclient_depth = (unsigned char)cpv->v.shrt; 906 break; 907 case 10:/* ssl.verifyclient.username */ 908 pconf->ssl_verifyclient_username = cpv->v.b; 909 break; 910 case 11:/* ssl.verifyclient.exportcert */ 911 pconf->ssl_verifyclient_export_cert = (0 != cpv->v.u); 912 break; 913 case 12:/* ssl.acme-tls-1 */ 914 pconf->ssl_acme_tls_1 = cpv->v.b; 915 break; 916 case 13:/* ssl.stapling-file */ 917 break; 918 case 14:/* debug.log-ssl-noise */ 919 pconf->ssl_log_noise = (unsigned char)cpv->v.shrt; 920 break; 921 default:/* should not happen */ 922 return; 923 } 924 } 925 926 927 static void 928 mod_nss_merge_config(plugin_config * const pconf, const config_plugin_value_t *cpv) 929 { 930 do { 931 mod_nss_merge_config_cpv(pconf, cpv); 932 } while ((++cpv)->k_id != -1); 933 } 934 935 936 static void 937 mod_nss_patch_config (request_st * const r, plugin_config * const pconf) 938 { 939 plugin_data * const p = plugin_data_singleton; 940 memcpy(pconf, &p->defaults, sizeof(plugin_config)); 941 for (int i = 1, used = p->nconfig; i < used; ++i) { 942 if (config_check_cond(r, (uint32_t)p->cvlist[i].k_id)) 943 mod_nss_merge_config(pconf, p->cvlist + p->cvlist[i].v.u2[0]); 944 } 945 } 946 947 948 static SECStatus 949 mod_nss_verify_cb (void *arg, PRFileDesc *ssl, PRBool checkSig, PRBool isServer) 950 { 951 handler_ctx * const hctx = arg; 952 if (!hctx->conf.ssl_verifyclient) return SECSuccess; 953 954 /* Notes 955 * trusted CAs in ssl.ca-file were loaded into default cert db at startup 956 * OCSP checking (querying OCSP Responder) is disabled by default 957 * CERT_EnableOCSPChecking() 958 * CERT_DisableOCSPChecking() 959 * cert_VerifyCertWithFlags() is not public, 960 * so unable to use CERT_VERIFYCERT_SKIP_OCSP 961 * hctx->verify_status is set here; not setting SSL_BadCertHook() 962 * XXX: not implemented (yet) here: hctx->conf.ssl_verifyclient_depth) 963 */ 964 965 CERTCertificate *peer = NULL; 966 967 #if 0 968 peer = SSL_PeerCertificate(ssl); 969 if (NULL == peer) 970 return (PORT_GetError() == SSL_ERROR_NO_CERTIFICATE) 971 ? SECSuccess 972 : SECFailure; 973 974 if (CERT_VerifyCert(CERT_GetDefaultCertDB(), peer, PR_TRUE, 975 certUsageSSLClient, (PRInt64)log_epoch_secs * 1000000, 976 SSL_RevealPinArg(ssl), NULL) < 0) 977 #else 978 if (SSL_AuthCertificate((void *)CERT_GetDefaultCertDB(), 979 ssl, checkSig, isServer) < 0) 980 #endif 981 { 982 hctx->verify_status = PORT_GetError(); 983 if (0 == hctx->verify_status) 984 hctx->verify_status = SEC_ERROR_UNTRUSTED_CERT; 985 } 986 987 if (hctx->verify_status == 0 && hctx->conf.ssl_ca_dn_file) { 988 /* verify that client cert is issued by CA in ssl.ca-dn-file 989 * if both ssl.ca-dn-file and ssl.ca-file were configured */ 990 if (NULL == peer) peer = SSL_PeerCertificate(ssl); 991 if (peer) { 992 CERTCertList * const certList = hctx->conf.ssl_ca_dn_file; 993 SECItem * const derIssuer = &peer->derIssuer; 994 CERTCertListNode *node = CERT_LIST_HEAD(certList); 995 for (; !CERT_LIST_END(node, certList); node = CERT_LIST_NEXT(node)){ 996 SECItem * const derSubject = &node->cert->derSubject; 997 if (SECITEM_CompareItem(derIssuer, derSubject) == SECEqual) 998 break; 999 } 1000 if (CERT_LIST_END(node, certList)) 1001 hctx->verify_status = SEC_ERROR_UNTRUSTED_CERT; 1002 } 1003 } 1004 1005 if (peer) CERT_DestroyCertificate(peer); 1006 1007 if (hctx->verify_status != 0 && hctx->conf.ssl_verifyclient_enforce) { 1008 PORT_SetError(SEC_ERROR_UNTRUSTED_CERT); 1009 return SECFailure; 1010 } 1011 1012 return SECSuccess; 1013 } 1014 1015 1016 static int 1017 mod_nss_reload_stapling_file (server *srv, plugin_cert *pc, const time_t cur_ts) 1018 { 1019 SECItem f; 1020 int rc = mod_nss_load_file(pc->ssl_stapling_file->ptr, &f, srv->errh); 1021 if (rc < 0) return rc; 1022 1023 /* NSS has the ability to include multiple OCSP responses for 1024 * certificate chain as allowed in TLSv1.3, but that is not utilized here. 1025 * If implemented, it will probably operate on a new directive, 1026 * e.g. ssl.stapling-pemfile 1027 */ 1028 1029 /* Note that the credentials structure should be read-only when in 1030 * use, thus when reloading, either the credentials structure must not 1031 * be in use by any sessions, or a new credentials structure should be 1032 * allocated for new sessions. 1033 * XXX: lighttpd is not threaded, so this is probably not an issue (?) 1034 */ 1035 1036 PORT_Free(pc->OCSPResponse.data); 1037 pc->OCSPResponse.data = f.data; 1038 pc->OCSPResponse.len = f.len; 1039 pc->OCSPResponses.items = &pc->OCSPResponse; 1040 pc->OCSPResponses.len = 1; 1041 pc->ssl_credex.stapledOCSPResponses = &pc->OCSPResponses; 1042 1043 /* NSS does not expose CERTOCSPSingleResponse member nextUpdate 1044 * to allow getting (PRTime) of nextUpdate from the OCSP response. 1045 * (PRTime is (PRInt64) of microseconds since epoch) 1046 * e.g. DER_GeneralizedTimeToTime(&nextUpdate, single->nextUpdate); 1047 * XXX: *not* implementing our own ASN.1 DER decoder for OCSP response 1048 * ssl.stapling-file will be reloaded hourly 1049 */ 1050 time_t nextupd = (time_t)-1; 1051 1052 pc->ssl_stapling_loadts = cur_ts; 1053 pc->ssl_stapling_nextts = nextupd; 1054 if (pc->ssl_stapling_nextts == (time_t)-1) { 1055 /* "Next Update" might not be provided by OCSP responder 1056 * Use 3600 sec (1 hour) in that case. */ 1057 /* retry in 1 hour if unable to determine Next Update */ 1058 pc->ssl_stapling_nextts = cur_ts + 3600; 1059 pc->ssl_stapling_loadts = 0; 1060 } 1061 1062 return 0; 1063 } 1064 1065 1066 static int 1067 mod_nss_refresh_stapling_file (server *srv, plugin_cert *pc, const time_t cur_ts) 1068 { 1069 if (pc->ssl_stapling_nextts >= 256 1070 && pc->ssl_stapling_nextts - 256 > cur_ts) 1071 return 0; /* skip check for refresh unless close to expire */ 1072 struct stat st; 1073 if (0 != stat(pc->ssl_stapling_file->ptr, &st) 1074 || st.st_mtime <= pc->ssl_stapling_loadts) { 1075 if (pc->ssl_stapling_nextts < cur_ts) { 1076 /* discard expired OCSP stapling response */ 1077 pc->ssl_credex.stapledOCSPResponses = NULL; 1078 if (pc->must_staple) { 1079 log_error(srv->errh, __FILE__, __LINE__, 1080 "certificate marked OCSP Must-Staple, " 1081 "but OCSP response expired from ssl.stapling-file %s", 1082 pc->ssl_stapling_file->ptr); 1083 } 1084 } 1085 return 0; 1086 } 1087 return mod_nss_reload_stapling_file(srv, pc, cur_ts); 1088 } 1089 1090 1091 static void 1092 mod_nss_refresh_stapling_files (server *srv, const plugin_data *p, const time_t cur_ts) 1093 { 1094 /* future: might construct array of (plugin_cert *) at startup 1095 * to avoid the need to search for them here */ 1096 for (int i = 0, used = p->nconfig; i < used; ++i) { 1097 const config_plugin_value_t *cpv = p->cvlist + p->cvlist[i].v.u2[0]; 1098 for (; cpv->k_id != -1; ++cpv) { 1099 if (cpv->k_id != 0) continue; /* k_id == 0 for ssl.pemfile */ 1100 if (cpv->vtype != T_CONFIG_LOCAL) continue; 1101 plugin_cert *pc = cpv->v.v; 1102 if (!buffer_string_is_empty(pc->ssl_stapling_file)) 1103 mod_nss_refresh_stapling_file(srv, pc, cur_ts); 1104 } 1105 } 1106 } 1107 1108 1109 static int 1110 mod_nss_crt_must_staple (CERTCertificate *crt) 1111 { 1112 /* Look for TLS features X.509 extension with value 5 1113 * RFC 7633 https://tools.ietf.org/html/rfc7633#appendix-A 1114 * 5 = OCSP Must-Staple (security mechanism) 1115 * 1116 * id-pe-tlsfeature 1.3.6.1.5.5.7.1.24 1117 * 1.3.6.1.5.5.7.1.24 = DER:30:03:02:01:05 1118 */ 1119 1120 int rc; 1121 1122 /* XXX: not implemented */ 1123 UNUSED(crt); 1124 rc = 0; 1125 1126 return rc; /* 1 if OCSP Must-Staple found; 0 if not */ 1127 } 1128 1129 1130 static void * 1131 network_nss_load_pemfile (server *srv, const buffer *pemfile, const buffer *privkey, const buffer *ssl_stapling_file) 1132 { 1133 CERTCertificateList *ssl_pemfile_chain; 1134 CERTCertificate *ssl_pemfile_x509 = 1135 mod_nss_load_pem_crts(pemfile->ptr, srv->errh, &ssl_pemfile_chain); 1136 if (NULL == ssl_pemfile_x509) 1137 return NULL; 1138 1139 SECKEYPrivateKey *pkey = 1140 mod_nss_load_config_pkey(privkey->ptr, ssl_pemfile_x509, srv->errh); 1141 if (NULL == pkey) { 1142 CERT_DestroyCertificate(ssl_pemfile_x509); 1143 if (ssl_pemfile_chain) CERT_DestroyCertificateList(ssl_pemfile_chain); 1144 return NULL; 1145 } 1146 1147 if (NULL == ssl_pemfile_chain) 1148 ssl_pemfile_chain = CERT_CertChainFromCert(ssl_pemfile_x509, 1149 certUsageSSLServer, 1150 PR_FALSE); 1151 1152 plugin_cert *pc = calloc(1, sizeof(plugin_cert)); 1153 force_assert(pc); 1154 pc->ssl_pemfile_pkey = pkey; 1155 pc->ssl_pemfile_x509 = ssl_pemfile_x509; 1156 pc->ssl_credex.certChain = ssl_pemfile_chain; 1157 pc->ssl_stapling_file= ssl_stapling_file; 1158 pc->ssl_stapling_loadts = 0; 1159 pc->ssl_stapling_nextts = 0; 1160 pc->OCSPResponse.type = 0; 1161 pc->OCSPResponse.data = NULL; 1162 pc->OCSPResponse.len = 0; 1163 pc->OCSPResponses.items = NULL; 1164 pc->OCSPResponses.len = 0; 1165 pc->must_staple = mod_nss_crt_must_staple(ssl_pemfile_x509); 1166 1167 if (!buffer_string_is_empty(pc->ssl_stapling_file)) { 1168 if (mod_nss_reload_stapling_file(srv, pc, log_epoch_secs) < 0) { 1169 /* continue without OCSP response if there is an error */ 1170 } 1171 } 1172 else if (pc->must_staple) { 1173 log_error(srv->errh, __FILE__, __LINE__, 1174 "certificate %s marked OCSP Must-Staple, " 1175 "but ssl.stapling-file not provided", pemfile->ptr); 1176 } 1177 1178 return pc; 1179 } 1180 1181 1182 static int 1183 mod_nss_acme_tls_1 (handler_ctx *hctx) 1184 { 1185 buffer * const b = hctx->tmp_buf; 1186 const buffer * const name = &hctx->r->uri.authority; 1187 log_error_st * const errh = hctx->r->conf.errh; 1188 1189 /* check if acme-tls/1 protocol is enabled (path to dir of cert(s) is set)*/ 1190 if (buffer_string_is_empty(hctx->conf.ssl_acme_tls_1)) 1191 return SECFailure; /*(should not happen)*/ 1192 buffer_copy_buffer(b, hctx->conf.ssl_acme_tls_1); 1193 buffer_append_slash(b); 1194 1195 /* check if SNI set server name (required for acme-tls/1 protocol) 1196 * and perform simple path checks for no '/' 1197 * and no leading '.' (e.g. ignore "." or ".." or anything beginning '.') */ 1198 if (buffer_string_is_empty(name)) return SECFailure; 1199 if (NULL != strchr(name->ptr, '/')) return SECFailure; 1200 if (name->ptr[0] == '.') return SECFailure; 1201 #if 0 1202 if (0 != http_request_host_policy(name, hctx->r->conf.http_parseopts, 443)) 1203 return SECFailure; 1204 #endif 1205 buffer_append_string_buffer(b, name); 1206 1207 /* cert and key load is similar to network_nss_load_pemfile() */ 1208 1209 uint32_t len = buffer_string_length(b); 1210 buffer_append_string_len(b, CONST_STR_LEN(".crt.pem")); 1211 1212 CERTCertificateList *ssl_pemfile_chain; 1213 CERTCertificate *ssl_pemfile_x509 = 1214 mod_nss_load_pem_crts(b->ptr, errh, &ssl_pemfile_chain); 1215 if (NULL == ssl_pemfile_x509) 1216 return SECFailure; 1217 1218 buffer_string_set_length(b, len); 1219 buffer_append_string_len(b, CONST_STR_LEN(".key.pem")); 1220 1221 SECKEYPrivateKey *pkey = 1222 mod_nss_load_config_pkey(b->ptr, ssl_pemfile_x509, errh); 1223 if (NULL == pkey) { 1224 CERT_DestroyCertificate(ssl_pemfile_x509); 1225 if (ssl_pemfile_chain) CERT_DestroyCertificateList(ssl_pemfile_chain); 1226 return SECFailure; 1227 } 1228 1229 /* use NSS deprecated functions to unconfigure an already-configured cert. 1230 * This is because SSL_ConfigServerCert() will replace an existing cert 1231 * of the same type, but not if an existing cert is of a different type */ 1232 if (hctx->conf.pc) { 1233 SSLKEAType certType = 1234 NSS_FindCertKEAType(hctx->conf.pc->ssl_pemfile_x509); 1235 SSL_ConfigSecureServerWithCertChain(hctx->ssl,NULL,NULL,NULL,certType); 1236 } 1237 1238 unsigned int dlen = 0; 1239 SSLExtraServerCertData *data = NULL; 1240 SSLExtraServerCertData d; 1241 if (ssl_pemfile_chain) { 1242 data = &d; 1243 dlen = sizeof(d); 1244 memset(&d, 0, sizeof(d)); 1245 d.certChain = ssl_pemfile_chain; 1246 } 1247 SECStatus rc = 1248 SSL_ConfigServerCert(hctx->ssl, ssl_pemfile_x509, pkey, data, dlen); 1249 1250 CERT_DestroyCertificate(ssl_pemfile_x509); 1251 SECKEY_DestroyPrivateKey(pkey); 1252 if (ssl_pemfile_chain) CERT_DestroyCertificateList(ssl_pemfile_chain); 1253 1254 if (hctx->conf.ssl_verifyclient) { 1255 /*(disable client certificate verification for "acme-tls/1")*/ 1256 hctx->conf.ssl_verifyclient = 0; 1257 SSL_OptionSet(hctx->ssl, SSL_REQUEST_CERTIFICATE, PR_FALSE); 1258 SSL_OptionSet(hctx->ssl, SSL_REQUIRE_CERTIFICATE, SSL_REQUIRE_NEVER); 1259 } 1260 1261 return rc; 1262 } 1263 1264 1265 enum { 1266 MOD_NSS_ALPN_HTTP11 = 1 1267 ,MOD_NSS_ALPN_HTTP10 = 2 1268 ,MOD_NSS_ALPN_H2 = 3 1269 ,MOD_NSS_ALPN_ACME_TLS_1 = 4 1270 }; 1271 1272 1273 static SECStatus 1274 mod_nss_alpn_select_cb (void *arg, PRFileDesc *ssl, 1275 const unsigned char *protos, unsigned int protosLen, 1276 unsigned char *protoOut, unsigned int *protoOutLen, 1277 unsigned int protoMaxOut) 1278 { 1279 /* https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml#alpn-protocol-ids */ 1280 static const SECItem alpn[] = { 1281 { 0, (unsigned char *)CONST_STR_LEN("h2") } 1282 ,{ 0, (unsigned char *)CONST_STR_LEN("http/1.1") } 1283 ,{ 0, (unsigned char *)CONST_STR_LEN("http/1.0") } 1284 ,{ 0, (unsigned char *)CONST_STR_LEN("acme-tls/1") } 1285 }; 1286 UNUSED(ssl); 1287 /* reference: lib/ssl/sslsock.c:ssl_NextProtoNegoCallback() */ 1288 for (unsigned int i = 0; i < protosLen; i += 1 + protos[i]) { 1289 for (unsigned int j = 0; j < sizeof(alpn)/sizeof(*alpn); ++j) { 1290 if (protos[i] == alpn[j].len && i+1+protos[i] <= protosLen 1291 && 0 == PORT_Memcmp(protos+i+1, alpn[j].data, alpn[j].len)) { 1292 1293 if (protoMaxOut < alpn[j].len) { 1294 PORT_SetError(SEC_ERROR_OUTPUT_LEN); 1295 return SECFailure; 1296 } 1297 1298 handler_ctx *hctx = arg; 1299 switch (j) { /*(must match SECItem alpn[] above)*/ 1300 case 0: 1301 if (!hctx->r->conf.h2proto) continue; 1302 hctx->alpn = MOD_NSS_ALPN_H2; 1303 hctx->r->http_version = HTTP_VERSION_2; 1304 break; 1305 case 1: 1306 hctx->alpn = MOD_NSS_ALPN_HTTP11; 1307 break; 1308 case 2: 1309 hctx->alpn = MOD_NSS_ALPN_HTTP10; 1310 break; 1311 case 3: 1312 if (buffer_string_is_empty(hctx->conf.ssl_acme_tls_1)) 1313 continue; 1314 if (0 == mod_nss_acme_tls_1(hctx)) 1315 hctx->alpn = MOD_NSS_ALPN_ACME_TLS_1; 1316 else { 1317 log_error(hctx->r->conf.errh, __FILE__, __LINE__, 1318 "failed to set acme-tls/1 certificate for TLS" 1319 " server name %s",hctx->r->uri.authority.ptr); 1320 return SECFailure; 1321 } 1322 break; 1323 default: 1324 break; 1325 } 1326 1327 memcpy(protoOut, alpn[j].data, alpn[j].len); 1328 *protoOutLen = alpn[j].len; 1329 1330 return SECSuccess; 1331 } 1332 } 1333 } 1334 return SECSuccess; 1335 } 1336 1337 1338 static PRInt32 1339 mod_nss_SNI (PRFileDesc *ssl, const SECItem *srvNameArr, PRUint32 srvNameArrSize, 1340 void *arg) 1341 { 1342 if (0 == srvNameArrSize) /* should not happen */ 1343 return SSL_SNI_CURRENT_CONFIG_IS_USED; 1344 1345 handler_ctx * const hctx = (handler_ctx *)arg; 1346 request_st * const r = hctx->r; 1347 buffer_copy_string(&r->uri.scheme, "https"); 1348 PRUint32 i = 0; /* index into srvNameArr; always take first element */ 1349 const SECItem *sn = srvNameArr+i; 1350 1351 if (sn->len >= 1024) { /*(expecting < 256; TLSEXT_MAXLEN_host_name is 255)*/ 1352 log_error(r->conf.errh, __FILE__, __LINE__, 1353 "NSS: SNI name too long %.*s", (int)sn->len,(char *)sn->data); 1354 return SSL_SNI_SEND_ALERT; 1355 } 1356 1357 /* use SNI to patch mod_nss config and then reset COMP_HTTP_HOST */ 1358 buffer_copy_string_len(&r->uri.authority, (const char *)sn->data, sn->len); 1359 buffer_to_lower(&r->uri.authority); 1360 #if 0 1361 /*(r->uri.authority used below for configuration before request read; 1362 * revisit for h2)*/ 1363 if (0 != http_request_host_policy(&r->uri.authority, 1364 r->conf.http_parseopts, 443)) 1365 return SSL_SNI_SEND_ALERT; 1366 #endif 1367 1368 r->conditional_is_valid |= (1 << COMP_HTTP_SCHEME) 1369 | (1 << COMP_HTTP_HOST); 1370 1371 plugin_cert *pc = hctx->conf.pc; 1372 1373 mod_nss_patch_config(r, &hctx->conf); 1374 /* reset COMP_HTTP_HOST so that conditions re-run after request hdrs read */ 1375 /*(done in configfile-glue.c:config_cond_cache_reset() after request hdrs read)*/ 1376 /*config_cond_cache_reset_item(r, COMP_HTTP_HOST);*/ 1377 /*buffer_clear(&r->uri.authority);*/ 1378 1379 if (pc == hctx->conf.pc) 1380 return SSL_SNI_CURRENT_CONFIG_IS_USED; 1381 1382 /* use NSS deprecated functions to unconfigure an already-configured cert. 1383 * This is because SSL_ConfigServerCert() will replace an existing cert 1384 * of the same type, but not if an existing cert is of a different type */ 1385 SSLKEAType certType = 1386 NSS_FindCertKEAType(hctx->conf.pc->ssl_pemfile_x509); 1387 SSL_ConfigSecureServerWithCertChain(ssl, NULL, NULL, NULL, certType); 1388 SECStatus rc = 1389 SSL_ConfigServerCert(ssl, hctx->conf.pc->ssl_pemfile_x509, 1390 hctx->conf.pc->ssl_pemfile_pkey, 1391 &hctx->conf.pc->ssl_credex, 1392 sizeof(hctx->conf.pc->ssl_credex)); 1393 if (rc < 0) { 1394 elogf(r->conf.errh, __FILE__, __LINE__, 1395 "failed to set SNI certificate for TLS server name %s", 1396 r->uri.authority.ptr); 1397 return SSL_SNI_SEND_ALERT; 1398 } 1399 1400 if (hctx->conf.ssl_verifyclient) { 1401 /*(XXX: technically do not need to redo if it has not changed)*/ 1402 if (SSL_AuthCertificateHook(ssl, mod_nss_verify_cb, hctx) < 0) { 1403 elog(r->conf.errh, __FILE__, __LINE__, "SSL_AuthCertificateHook"); 1404 return SSL_SNI_SEND_ALERT; 1405 } 1406 CERTCertList * const certList = hctx->conf.ssl_ca_dn_file 1407 ? hctx->conf.ssl_ca_dn_file 1408 : hctx->conf.ssl_ca_file; 1409 if (NULL == certList) 1410 log_error(hctx->r->conf.errh, __FILE__, __LINE__, 1411 "NSS: can't verify client without ssl.ca-file " 1412 "for TLS server name %s", 1413 hctx->r->uri.authority.ptr); /*(might not be set yet if no SNI)*/ 1414 if (certList && SSL_SetTrustAnchors(ssl, certList) < 0) { 1415 elog(r->conf.errh, __FILE__, __LINE__, "SSL_SetTrustAnchors"); 1416 return SSL_SNI_SEND_ALERT; 1417 } 1418 SSL_OptionSet(ssl, SSL_REQUEST_CERTIFICATE, PR_TRUE); 1419 SSL_OptionSet(ssl, SSL_REQUIRE_CERTIFICATE, 1420 hctx->conf.ssl_verifyclient_enforce 1421 ? SSL_REQUIRE_ALWAYS 1422 : SSL_REQUIRE_NEVER); 1423 } 1424 else { 1425 SSL_OptionSet(ssl, SSL_REQUEST_CERTIFICATE, PR_FALSE); 1426 SSL_OptionSet(ssl, SSL_REQUIRE_CERTIFICATE, SSL_REQUIRE_NEVER); 1427 } 1428 1429 return (PRInt32)i; 1430 } 1431 1432 1433 static int 1434 mod_nss_ssl_conf_ciphersuites (server *srv, plugin_config_socket *s, buffer *ciphersuites, const buffer *cipherstring); 1435 1436 1437 static int 1438 mod_nss_ssl_conf_curves(server *srv, plugin_config_socket *s, const buffer *curvelist); 1439 1440 1441 static void 1442 mod_nss_ssl_conf_proto (server *srv, plugin_config_socket *s, const buffer *minb, const buffer *maxb); 1443 1444 1445 static int 1446 mod_nss_ssl_conf_cmd (server *srv, plugin_config_socket *s) 1447 { 1448 /* reference: 1449 * https://www.openssl.org/docs/man1.1.1/man3/SSL_CONF_cmd.html */ 1450 int rc = 0; 1451 buffer *cipherstring = NULL; 1452 buffer *ciphersuites = NULL; 1453 buffer *minb = NULL; 1454 buffer *maxb = NULL; 1455 buffer *curves = NULL; 1456 1457 for (size_t i = 0; i < s->ssl_conf_cmd->used; ++i) { 1458 data_string *ds = (data_string *)s->ssl_conf_cmd->data[i]; 1459 if (buffer_eq_icase_slen(&ds->key, CONST_STR_LEN("CipherString"))) 1460 cipherstring = &ds->value; 1461 else if (buffer_eq_icase_slen(&ds->key, CONST_STR_LEN("Ciphersuites"))) 1462 ciphersuites = &ds->value; 1463 else if (buffer_eq_icase_slen(&ds->key, CONST_STR_LEN("Curves")) 1464 || buffer_eq_icase_slen(&ds->key, CONST_STR_LEN("Groups"))) 1465 curves = &ds->value; 1466 else if (buffer_eq_icase_slen(&ds->key, CONST_STR_LEN("MaxProtocol"))) 1467 maxb = &ds->value; 1468 else if (buffer_eq_icase_slen(&ds->key, CONST_STR_LEN("MinProtocol"))) 1469 minb = &ds->value; 1470 else if (buffer_eq_icase_slen(&ds->key, CONST_STR_LEN("Protocol"))) { 1471 /* openssl config for Protocol=... is complex and deprecated */ 1472 log_error(srv->errh, __FILE__, __LINE__, 1473 "NSS: ssl.openssl.ssl-conf-cmd %s ignored; " 1474 "use MinProtocol=... and MaxProtocol=... instead", 1475 ds->key.ptr); 1476 } 1477 else if (buffer_eq_icase_slen(&ds->key, CONST_STR_LEN("Options"))) { 1478 for (char *v = ds->value.ptr, *e; *v; v = e) { 1479 while (*v == ' ' || *v == '\t' || *v == ',') ++v; 1480 int flag = 1; 1481 if (*v == '-') { 1482 flag = 0; 1483 ++v; 1484 } 1485 for (e = v; light_isalpha(*e); ++e) ; 1486 switch ((int)(e-v)) { 1487 case 11: 1488 if (buffer_eq_icase_ssn(v, "Compression", 11)) { 1489 s->ssl_compression = flag; 1490 continue; 1491 } 1492 break; 1493 case 13: 1494 if (buffer_eq_icase_ssn(v, "SessionTicket", 13)) { 1495 /*(translates to "%NO_TICKETS" priority str if !flag)*/ 1496 s->ssl_session_ticket = flag; 1497 continue; 1498 } 1499 break; 1500 case 16: 1501 if (buffer_eq_icase_ssn(v, "ServerPreference", 16)) { 1502 /*(translates to "%SERVER_PRECEDENCE" priority string)*/ 1503 s->ssl_honor_cipher_order = flag; 1504 continue; 1505 } 1506 break; 1507 default: 1508 break; 1509 } 1510 /* warn if not explicitly handled or ignored above */ 1511 if (!flag) --v; 1512 log_error(srv->errh, __FILE__, __LINE__, 1513 "NSS: ssl.openssl.ssl-conf-cmd Options %.*s " 1514 "ignored", (int)(e-v), v); 1515 } 1516 } 1517 #if 0 1518 else if (buffer_eq_icase_slen(&ds->key, CONST_STR_LEN("..."))) { 1519 } 1520 #endif 1521 else { 1522 /* warn if not explicitly handled or ignored above */ 1523 log_error(srv->errh, __FILE__, __LINE__, 1524 "NSS: ssl.openssl.ssl-conf-cmd %s ignored", 1525 ds->key.ptr); 1526 } 1527 } 1528 1529 if (minb || maxb) /*(if at least one was set)*/ 1530 mod_nss_ssl_conf_proto(srv, s, minb, maxb); 1531 1532 if (!mod_nss_ssl_conf_ciphersuites(srv, s, ciphersuites, cipherstring)) 1533 rc = -1; 1534 1535 if (curves) { 1536 if (!mod_nss_ssl_conf_curves(srv, s, curves)) 1537 rc = -1; 1538 } 1539 1540 return rc; 1541 } 1542 1543 1544 static int 1545 network_init_ssl (server *srv, plugin_config_socket *s, plugin_data *p) 1546 { 1547 UNUSED(p); 1548 1549 /* use PR_CreateSocketPollFd() for dummy; 1550 * PR_CreateIOLayerStub() was resulting in crashes 1551 * when SSL_ImportFD() attempted ssl_DefGetpeername() */ 1552 s->model = PR_CreateSocketPollFd(-1); 1553 if (NULL == s->model) return -1; 1554 s->model->methods = PR_GetTCPMethods(); 1555 PRFileDesc *model = SSL_ImportFD(NULL, s->model); 1556 if (NULL == model) return -1; 1557 s->model = model; 1558 1559 if (!buffer_string_is_empty(s->ssl_cipher_list)) { 1560 if (!mod_nss_ssl_conf_ciphersuites(srv,s,NULL,s->ssl_cipher_list)) 1561 return -1; 1562 } 1563 1564 if (!buffer_string_is_empty(s->ssl_ec_curve)) { 1565 if (!mod_nss_ssl_conf_curves(srv, s, s->ssl_ec_curve)) 1566 return -1; 1567 } 1568 1569 if (!s->ssl_use_sslv3 && !s->ssl_use_sslv2) 1570 mod_nss_ssl_conf_proto(srv, s, NULL, NULL); /* set default range */ 1571 1572 if (s->ssl_conf_cmd && s->ssl_conf_cmd->used) { 1573 if (0 != mod_nss_ssl_conf_cmd(srv, s)) return -1; 1574 } 1575 1576 if (s->ssl_use_sslv3) 1577 s->protos.min = SSL_LIBRARY_VERSION_3_0; 1578 if (s->ssl_use_sslv2) 1579 s->protos.min = SSL_LIBRARY_VERSION_2; 1580 1581 /* future: add additional configuration of s->model here 1582 * rather than in mod_nss_handle_con_accept() */ 1583 1584 if (SSL_OptionSet(model, SSL_SECURITY, PR_TRUE) < 0) { 1585 elog(srv->errh, __FILE__, __LINE__, "SSL_SECURITY"); 1586 return -1; 1587 } 1588 1589 if (SSL_VersionRangeSet(model, &s->protos)) { 1590 elog(srv->errh, __FILE__, __LINE__, "SSL_VersionRangeSet()"); 1591 return -1; 1592 } 1593 1594 if (s->protos.min == SSL_LIBRARY_VERSION_2 1595 && SSL_OptionSet(model, SSL_ENABLE_SSL2, PR_TRUE) < 0) { 1596 elog(srv->errh, __FILE__, __LINE__, "SSL_ENABLE_SSL2"); 1597 return -1; 1598 } 1599 1600 if (s->protos.min == SSL_LIBRARY_VERSION_3_0 1601 && SSL_OptionSet(model, SSL_ENABLE_SSL3, PR_TRUE) < 0) { 1602 elog(srv->errh, __FILE__, __LINE__, "SSL_ENABLE_SSL3"); 1603 return -1; 1604 } 1605 1606 if (!s->ssl_session_ticket 1607 && SSL_OptionSet(model, SSL_ENABLE_SESSION_TICKETS, PR_FALSE) < 0) { 1608 elog(srv->errh, __FILE__, __LINE__, "!SSL_ENABLE_SESSION_TICKETS"); 1609 return -1; 1610 } 1611 1612 if (SSL_OptionSet(model, SSL_ENABLE_DEFLATE, s->ssl_compression) < 0) { 1613 elog(srv->errh, __FILE__, __LINE__, "SSL_ENABLE_DEFLATE"); 1614 return HANDLER_ERROR; 1615 } 1616 1617 SSL_OptionSet(model, SSL_REQUEST_CERTIFICATE, PR_FALSE); 1618 SSL_OptionSet(model, SSL_REQUIRE_CERTIFICATE, SSL_REQUIRE_NEVER); 1619 1620 SECStatus rc = 1621 SSL_ConfigServerCert(model, s->pc->ssl_pemfile_x509, 1622 s->pc->ssl_pemfile_pkey, 1623 &s->pc->ssl_credex, 1624 sizeof(s->pc->ssl_credex)); 1625 if (rc < 0) { 1626 elogf(srv->errh, __FILE__, __LINE__, 1627 "failed to set default certificate for socket"); 1628 return -1; 1629 } 1630 1631 return 0; 1632 } 1633 1634 1635 static int 1636 mod_nss_set_defaults_sockets(server *srv, plugin_data *p) 1637 { 1638 static const config_plugin_keys_t cpk[] = { 1639 { CONST_STR_LEN("ssl.engine"), 1640 T_CONFIG_BOOL, 1641 T_CONFIG_SCOPE_CONNECTION } 1642 ,{ CONST_STR_LEN("ssl.cipher-list"), 1643 T_CONFIG_STRING, 1644 T_CONFIG_SCOPE_CONNECTION } 1645 ,{ CONST_STR_LEN("ssl.honor-cipher-order"), 1646 T_CONFIG_BOOL, 1647 T_CONFIG_SCOPE_CONNECTION } 1648 ,{ CONST_STR_LEN("ssl.dh-file"), 1649 T_CONFIG_STRING, 1650 T_CONFIG_SCOPE_CONNECTION } 1651 ,{ CONST_STR_LEN("ssl.ec-curve"), 1652 T_CONFIG_STRING, 1653 T_CONFIG_SCOPE_CONNECTION } 1654 ,{ CONST_STR_LEN("ssl.openssl.ssl-conf-cmd"), 1655 T_CONFIG_ARRAY_KVSTRING, 1656 T_CONFIG_SCOPE_CONNECTION } 1657 ,{ CONST_STR_LEN("ssl.pemfile"), /* included to process global scope */ 1658 T_CONFIG_STRING, 1659 T_CONFIG_SCOPE_CONNECTION } 1660 ,{ CONST_STR_LEN("ssl.empty-fragments"), 1661 T_CONFIG_BOOL, 1662 T_CONFIG_SCOPE_CONNECTION } 1663 ,{ CONST_STR_LEN("ssl.use-sslv2"), 1664 T_CONFIG_BOOL, 1665 T_CONFIG_SCOPE_CONNECTION } 1666 ,{ CONST_STR_LEN("ssl.use-sslv3"), 1667 T_CONFIG_BOOL, 1668 T_CONFIG_SCOPE_CONNECTION } 1669 ,{ CONST_STR_LEN("ssl.stek-file"), 1670 T_CONFIG_STRING, 1671 T_CONFIG_SCOPE_SERVER } 1672 ,{ NULL, 0, 1673 T_CONFIG_UNSET, 1674 T_CONFIG_SCOPE_UNSET } 1675 }; 1676 static const buffer default_ssl_cipher_list = { CONST_STR_LEN("HIGH"), 0 }; 1677 1678 p->ssl_ctxs = calloc(srv->config_context->used, sizeof(plugin_ssl_ctx)); 1679 force_assert(p->ssl_ctxs); 1680 1681 int rc = HANDLER_GO_ON; 1682 plugin_data_base srvplug; 1683 memset(&srvplug, 0, sizeof(srvplug)); 1684 plugin_data_base * const ps = &srvplug; 1685 if (!config_plugin_values_init(srv, ps, cpk, "mod_nss")) 1686 return HANDLER_ERROR; 1687 1688 plugin_config_socket defaults; 1689 memset(&defaults, 0, sizeof(defaults)); 1690 defaults.ssl_honor_cipher_order = 1; /* default server preference for PFS */ 1691 defaults.ssl_session_ticket = 1; /* enabled by default */ 1692 defaults.ssl_compression = 0; /* disable for security */ 1693 defaults.ssl_cipher_list = &default_ssl_cipher_list; 1694 1695 /* process and validate config directives for global and $SERVER["socket"] 1696 * (init i to 0 if global context; to 1 to skip empty global context) */ 1697 for (int i = !ps->cvlist[0].v.u2[1]; i < ps->nconfig; ++i) { 1698 config_cond_info cfginfo; 1699 config_get_config_cond_info(&cfginfo, (uint32_t)ps->cvlist[i].k_id); 1700 int is_socket_scope = (0 == i || cfginfo.comp == COMP_SERVER_SOCKET); 1701 int count_not_engine = 0; 1702 1703 plugin_config_socket conf; 1704 memcpy(&conf, &defaults, sizeof(conf)); 1705 1706 /*(preserve prior behavior; not inherited)*/ 1707 /*(forcing inheritance might break existing configs where SSL is enabled 1708 * by default in the global scope, but not $SERVER["socket"]=="*:80") */ 1709 conf.ssl_enabled = 0; 1710 1711 config_plugin_value_t *cpv = ps->cvlist + ps->cvlist[i].v.u2[0]; 1712 for (; -1 != cpv->k_id; ++cpv) { 1713 /* ignore ssl.pemfile (k_id=10); included to process global scope */ 1714 if (!is_socket_scope && cpv->k_id != 10) { 1715 log_error(srv->errh, __FILE__, __LINE__, 1716 "NSS: %s is valid only in global scope or " 1717 "$SERVER[\"socket\"] condition", cpk[cpv->k_id].k); 1718 continue; 1719 } 1720 ++count_not_engine; 1721 switch (cpv->k_id) { 1722 case 0: /* ssl.engine */ 1723 conf.ssl_enabled = (0 != cpv->v.u); 1724 --count_not_engine; 1725 break; 1726 case 1: /* ssl.cipher-list */ 1727 conf.ssl_cipher_list = cpv->v.b; 1728 break; 1729 case 2: /* ssl.honor-cipher-order */ 1730 conf.ssl_honor_cipher_order = (0 != cpv->v.u); 1731 break; 1732 case 3: /* ssl.dh-file */ 1733 log_error(srv->errh, __FILE__, __LINE__, 1734 "NSS: ignoring ssl.dh-file; not implemented" 1735 "obsoleted by RFC7919"); 1736 break; 1737 case 4: /* ssl.ec-curve */ 1738 conf.ssl_ec_curve = cpv->v.b; 1739 break; 1740 case 5: /* ssl.openssl.ssl-conf-cmd */ 1741 *(const array **)&conf.ssl_conf_cmd = cpv->v.a; 1742 break; 1743 case 6: /* ssl.pemfile */ 1744 /* ignore here; included to process global scope when 1745 * ssl.pemfile is set, but ssl.engine is not "enable" */ 1746 break; 1747 case 7: /* ssl.empty-fragments */ 1748 conf.ssl_empty_fragments = (0 != cpv->v.u); 1749 log_error(srv->errh, __FILE__, __LINE__, 1750 "NSS: ignoring ssl.empty-fragments; openssl-specific " 1751 "counter-measure against a SSL 3.0/TLS 1.0 protocol " 1752 "vulnerability affecting CBC ciphers, which cannot be handled" 1753 " by some broken (Microsoft) SSL implementations."); 1754 break; 1755 case 8: /* ssl.use-sslv2 */ 1756 conf.ssl_use_sslv2 = (0 != cpv->v.u); 1757 log_error(srv->errh, __FILE__, __LINE__, "NSS: " 1758 "ssl.use-sslv2 is deprecated and will soon be removed. " 1759 "Many modern TLS libraries no longer support SSLv2."); 1760 break; 1761 case 9: /* ssl.use-sslv3 */ 1762 conf.ssl_use_sslv3 = (0 != cpv->v.u); 1763 log_error(srv->errh, __FILE__, __LINE__, "NSS: " 1764 "ssl.use-sslv3 is deprecated and will soon be removed. " 1765 "Many modern TLS libraries no longer support SSLv3. " 1766 "If needed, use: " 1767 "ssl.openssl.ssl-conf-cmd = (\"MinProtocol\" => \"SSLv3\")"); 1768 break; 1769 case 10:/* ssl.stek-file */ 1770 log_error(srv->errh, __FILE__, __LINE__, "NSS: " 1771 "ssl.stek-file is not supported in mod_nss; ignoring."); 1772 break; 1773 default:/* should not happen */ 1774 break; 1775 } 1776 } 1777 if (HANDLER_GO_ON != rc) break; 1778 if (0 == i) memcpy(&defaults, &conf, sizeof(conf)); 1779 1780 if (0 != i && !conf.ssl_enabled) continue; 1781 1782 /* fill plugin_config_socket with global context then $SERVER["socket"] 1783 * only for directives directly in current $SERVER["socket"] condition*/ 1784 1785 /*conf.pc = p->defaults.pc;*/ 1786 conf.ssl_verifyclient = p->defaults.ssl_verifyclient; 1787 conf.ssl_verifyclient_enforce = p->defaults.ssl_verifyclient_enforce; 1788 conf.ssl_verifyclient_depth = p->defaults.ssl_verifyclient_depth; 1789 1790 int sidx = ps->cvlist[i].k_id; 1791 for (int j = !p->cvlist[0].v.u2[1]; j < p->nconfig; ++j) { 1792 if (p->cvlist[j].k_id != sidx) continue; 1793 /*if (0 == sidx) break;*//*(repeat to get ssl_pemfile,ssl_privkey)*/ 1794 cpv = p->cvlist + p->cvlist[j].v.u2[0]; 1795 for (; -1 != cpv->k_id; ++cpv) { 1796 ++count_not_engine; 1797 switch (cpv->k_id) { 1798 case 0: /* ssl.pemfile */ 1799 if (cpv->vtype == T_CONFIG_LOCAL) 1800 conf.pc = cpv->v.v; 1801 break; 1802 case 7: /* ssl.verifyclient.activate */ 1803 conf.ssl_verifyclient = (0 != cpv->v.u); 1804 break; 1805 case 8: /* ssl.verifyclient.enforce */ 1806 conf.ssl_verifyclient_enforce = (0 != cpv->v.u); 1807 break; 1808 case 9: /* ssl.verifyclient.depth */ 1809 conf.ssl_verifyclient_depth = (unsigned char)cpv->v.shrt; 1810 break; 1811 default: 1812 break; 1813 } 1814 } 1815 break; 1816 } 1817 1818 if (NULL == conf.pc) { 1819 if (0 == i && !conf.ssl_enabled) continue; 1820 if (0 != i) { 1821 /* inherit ssl settings from global scope 1822 * (if only ssl.engine = "enable" and no other ssl.* settings) 1823 * (This is for convenience when defining both IPv4 and IPv6 1824 * and desiring to inherit the ssl config from global context 1825 * without having to duplicate the directives)*/ 1826 if (count_not_engine 1827 || (conf.ssl_enabled && NULL == p->ssl_ctxs[0].model)) { 1828 log_error(srv->errh, __FILE__, __LINE__, 1829 "NSS: ssl.pemfile has to be set in same " 1830 "$SERVER[\"socket\"] scope as other ssl.* directives, " 1831 "unless only ssl.engine is set, inheriting ssl.* from " 1832 "global scope"); 1833 rc = HANDLER_ERROR; 1834 continue; 1835 } 1836 plugin_ssl_ctx * const s = p->ssl_ctxs + sidx; 1837 *s = *p->ssl_ctxs;/*(copy struct of ssl_ctx from global scope)*/ 1838 continue; 1839 } 1840 /* PEM file is required */ 1841 log_error(srv->errh, __FILE__, __LINE__, 1842 "NSS: ssl.pemfile has to be set when ssl.engine = \"enable\""); 1843 rc = HANDLER_ERROR; 1844 continue; 1845 } 1846 1847 /* (initialize once if module enabled) */ 1848 if (!mod_nss_init_once_nss()) { 1849 rc = HANDLER_ERROR; 1850 break; 1851 } 1852 1853 /* configure ssl_ctx for socket */ 1854 1855 /*conf.ssl_ctx = NULL;*//*(filled by network_init_ssl() even on error)*/ 1856 if (0 == network_init_ssl(srv, &conf, p)) { 1857 plugin_ssl_ctx * const s = p->ssl_ctxs + sidx; 1858 s->model = conf.model; 1859 s->protos = conf.protos; 1860 s->ssl_compression = conf.ssl_compression; 1861 s->ssl_session_ticket = conf.ssl_session_ticket; 1862 } 1863 else { 1864 if (conf.model) PR_Close(conf.model); 1865 rc = HANDLER_ERROR; 1866 } 1867 } 1868 1869 free(srvplug.cvlist); 1870 return rc; 1871 } 1872 1873 1874 SETDEFAULTS_FUNC(mod_nss_set_defaults) 1875 { 1876 static const config_plugin_keys_t cpk[] = { 1877 { CONST_STR_LEN("ssl.pemfile"), 1878 T_CONFIG_STRING, 1879 T_CONFIG_SCOPE_CONNECTION } 1880 ,{ CONST_STR_LEN("ssl.privkey"), 1881 T_CONFIG_STRING, 1882 T_CONFIG_SCOPE_CONNECTION } 1883 ,{ CONST_STR_LEN("ssl.ca-file"), 1884 T_CONFIG_STRING, 1885 T_CONFIG_SCOPE_CONNECTION } 1886 ,{ CONST_STR_LEN("ssl.ca-dn-file"), 1887 T_CONFIG_STRING, 1888 T_CONFIG_SCOPE_CONNECTION } 1889 ,{ CONST_STR_LEN("ssl.ca-crl-file"), 1890 T_CONFIG_STRING, 1891 T_CONFIG_SCOPE_CONNECTION } 1892 ,{ CONST_STR_LEN("ssl.read-ahead"), 1893 T_CONFIG_BOOL, 1894 T_CONFIG_SCOPE_CONNECTION } 1895 ,{ CONST_STR_LEN("ssl.disable-client-renegotiation"), 1896 T_CONFIG_BOOL, 1897 T_CONFIG_SCOPE_CONNECTION } 1898 ,{ CONST_STR_LEN("ssl.verifyclient.activate"), 1899 T_CONFIG_BOOL, 1900 T_CONFIG_SCOPE_CONNECTION } 1901 ,{ CONST_STR_LEN("ssl.verifyclient.enforce"), 1902 T_CONFIG_BOOL, 1903 T_CONFIG_SCOPE_CONNECTION } 1904 ,{ CONST_STR_LEN("ssl.verifyclient.depth"), 1905 T_CONFIG_SHORT, 1906 T_CONFIG_SCOPE_CONNECTION } 1907 ,{ CONST_STR_LEN("ssl.verifyclient.username"), 1908 T_CONFIG_STRING, 1909 T_CONFIG_SCOPE_CONNECTION } 1910 ,{ CONST_STR_LEN("ssl.verifyclient.exportcert"), 1911 T_CONFIG_BOOL, 1912 T_CONFIG_SCOPE_CONNECTION } 1913 ,{ CONST_STR_LEN("ssl.acme-tls-1"), 1914 T_CONFIG_STRING, 1915 T_CONFIG_SCOPE_CONNECTION } 1916 ,{ CONST_STR_LEN("ssl.stapling-file"), 1917 T_CONFIG_STRING, 1918 T_CONFIG_SCOPE_CONNECTION } 1919 ,{ CONST_STR_LEN("debug.log-ssl-noise"), 1920 T_CONFIG_SHORT, 1921 T_CONFIG_SCOPE_CONNECTION } 1922 ,{ NULL, 0, 1923 T_CONFIG_UNSET, 1924 T_CONFIG_SCOPE_UNSET } 1925 }; 1926 1927 plugin_data * const p = p_d; 1928 p->srv = srv; 1929 if (!config_plugin_values_init(srv, p, cpk, "mod_nss")) 1930 return HANDLER_ERROR; 1931 1932 /* process and validate config directives 1933 * (init i to 0 if global context; to 1 to skip empty global context) */ 1934 for (int i = !p->cvlist[0].v.u2[1]; i < p->nconfig; ++i) { 1935 config_plugin_value_t *cpv = p->cvlist + p->cvlist[i].v.u2[0]; 1936 config_plugin_value_t *pemfile = NULL; 1937 config_plugin_value_t *privkey = NULL; 1938 const buffer *ssl_stapling_file = NULL; 1939 for (; -1 != cpv->k_id; ++cpv) { 1940 switch (cpv->k_id) { 1941 case 0: /* ssl.pemfile */ 1942 if (!buffer_string_is_empty(cpv->v.b)) pemfile = cpv; 1943 break; 1944 case 1: /* ssl.privkey */ 1945 if (!buffer_string_is_empty(cpv->v.b)) privkey = cpv; 1946 break; 1947 case 2: /* ssl.ca-file */ 1948 if (!buffer_string_is_empty(cpv->v.b)) { 1949 CERTCertList *d = 1950 mod_nss_load_config_crts(cpv->v.b->ptr, srv->errh); 1951 if (d != NULL) { 1952 cpv->vtype = T_CONFIG_LOCAL; 1953 cpv->v.v = d; 1954 } 1955 else { 1956 log_error(srv->errh, __FILE__, __LINE__, 1957 "%s = %s", cpk[cpv->k_id].k, cpv->v.b->ptr); 1958 return HANDLER_ERROR; 1959 } 1960 } 1961 break; 1962 case 3: /* ssl.ca-dn-file */ 1963 if (!buffer_string_is_empty(cpv->v.b)) { 1964 CERTCertList *d = 1965 mod_nss_load_config_dncrts(cpv->v.b->ptr, srv->errh); 1966 if (d != NULL) { 1967 cpv->vtype = T_CONFIG_LOCAL; 1968 cpv->v.v = d; 1969 } 1970 else { 1971 log_error(srv->errh, __FILE__, __LINE__, 1972 "%s = %s", cpk[cpv->k_id].k, cpv->v.b->ptr); 1973 return HANDLER_ERROR; 1974 } 1975 } 1976 break; 1977 case 4: /* ssl.ca-crl-file */ 1978 if (!buffer_string_is_empty(cpv->v.b)) { 1979 CERTCertificateList *d = 1980 mod_nss_load_config_crls(cpv->v.b->ptr, srv->errh); 1981 if (d != NULL) { 1982 cpv->vtype = T_CONFIG_LOCAL; 1983 cpv->v.v = d; 1984 } 1985 else { 1986 log_error(srv->errh, __FILE__, __LINE__, 1987 "%s = %s", cpk[cpv->k_id].k, cpv->v.b->ptr); 1988 return HANDLER_ERROR; 1989 } 1990 } 1991 break; 1992 case 5: /* ssl.read-ahead */ 1993 case 6: /* ssl.disable-client-renegotiation */ 1994 case 7: /* ssl.verifyclient.activate */ 1995 case 8: /* ssl.verifyclient.enforce */ 1996 break; 1997 case 9: /* ssl.verifyclient.depth */ 1998 if (cpv->v.shrt > 255) { 1999 log_error(srv->errh, __FILE__, __LINE__, 2000 "NSS: %s is absurdly large (%hu); limiting to 255", 2001 cpk[cpv->k_id].k, cpv->v.shrt); 2002 cpv->v.shrt = 255; 2003 } 2004 break; 2005 case 10:/* ssl.verifyclient.username */ 2006 case 11:/* ssl.verifyclient.exportcert */ 2007 case 12:/* ssl.acme-tls-1 */ 2008 break; 2009 case 13:/* ssl.stapling-file */ 2010 ssl_stapling_file = cpv->v.b; 2011 break; 2012 case 14:/* debug.log-ssl-noise */ 2013 break; 2014 default:/* should not happen */ 2015 break; 2016 } 2017 } 2018 2019 if (pemfile) { 2020 if (NULL == privkey) privkey = pemfile; 2021 pemfile->v.v = 2022 network_nss_load_pemfile(srv, pemfile->v.b, privkey->v.b, 2023 ssl_stapling_file); 2024 if (pemfile->v.v) 2025 pemfile->vtype = T_CONFIG_LOCAL; 2026 else 2027 return HANDLER_ERROR; 2028 } 2029 } 2030 2031 p->defaults.ssl_verifyclient = 0; 2032 p->defaults.ssl_verifyclient_enforce = 1; 2033 p->defaults.ssl_verifyclient_depth = 9; 2034 p->defaults.ssl_verifyclient_export_cert = 0; 2035 p->defaults.ssl_disable_client_renegotiation = 1; 2036 p->defaults.ssl_read_ahead = 0; 2037 2038 /* initialize p->defaults from global config context */ 2039 if (p->nconfig > 0 && p->cvlist->v.u2[1]) { 2040 const config_plugin_value_t *cpv = p->cvlist + p->cvlist->v.u2[0]; 2041 if (-1 != cpv->k_id) 2042 mod_nss_merge_config(&p->defaults, cpv); 2043 } 2044 2045 return mod_nss_set_defaults_sockets(srv, p); 2046 } 2047 2048 2049 /* local_send_buffer is a static buffer of size (LOCAL_SEND_BUFSIZE) 2050 * 2051 * buffer is allocated once, is NOT realloced (note: not thread-safe) 2052 * */ 2053 2054 /* copy small mem chunks into single large buffer 2055 * before PR_Write() to reduce number times write() called 2056 * underneath PR_Write() and potentially reduce number of packets 2057 * generated if TCP_NODELAY */ 2058 2059 2060 __attribute_cold__ 2061 static int 2062 mod_nss_write_err(connection *con, handler_ctx *hctx, size_t wr_len) 2063 { 2064 switch (PR_GetError()) { 2065 case PR_WOULD_BLOCK_ERROR: 2066 case PR_PENDING_INTERRUPT_ERROR: 2067 con->is_writable = -1; 2068 /* XXX: not handled: protocol might be blocked waiting on read */ 2069 /*if (0) con->is_readable = -1;*/ 2070 break; /* try again later */ 2071 case PR_CONNECT_RESET_ERROR: 2072 if (!hctx->conf.ssl_log_noise) return -1; 2073 __attribute_fallthrough__ 2074 default: 2075 elog(hctx->r->conf.errh, __FILE__, __LINE__, __func__); 2076 return -1; 2077 } 2078 2079 /* partial write; save attempted wr_len */ 2080 hctx->pending_write = wr_len; 2081 2082 return 0; /* try again later */ 2083 } 2084 2085 2086 __attribute_cold__ 2087 static int 2088 mod_nss_read_err(connection *con, handler_ctx *hctx) 2089 { 2090 switch (PR_GetError()) { 2091 case PR_WOULD_BLOCK_ERROR: 2092 case PR_PENDING_INTERRUPT_ERROR: 2093 /* XXX: not handled: protocol might be blocked waiting on write */ 2094 /*if (0) con->is_writable = -1;*/ 2095 con->is_readable = 0; 2096 return 0; 2097 case PR_CONNECT_ABORTED_ERROR: 2098 case PR_CONNECT_RESET_ERROR: 2099 if (!hctx->conf.ssl_log_noise) return -1; 2100 __attribute_fallthrough__ 2101 default: 2102 elog(hctx->errh, __FILE__, __LINE__, __func__); 2103 return -1; 2104 } 2105 } 2106 2107 2108 static int 2109 mod_nss_close_notify(handler_ctx *hctx); 2110 2111 2112 static int 2113 connection_write_cq_ssl (connection *con, chunkqueue *cq, off_t max_bytes) 2114 { 2115 handler_ctx *hctx = con->plugin_ctx[plugin_data_singleton->id]; 2116 PRFileDesc *ssl = hctx->ssl; 2117 log_error_st * const errh = hctx->errh; 2118 2119 if (0 != hctx->close_notify) return mod_nss_close_notify(hctx); 2120 2121 chunkqueue_remove_finished_chunks(cq); 2122 2123 /* future: for efficiency/performance might consider using NSS 2124 * PR_Writev() PR_TransmitFile() PR_SendFile() 2125 */ 2126 2127 while (max_bytes > 0 && !chunkqueue_is_empty(cq)) { 2128 char *data = local_send_buffer; 2129 uint32_t data_len = LOCAL_SEND_BUFSIZE < max_bytes 2130 ? LOCAL_SEND_BUFSIZE 2131 : (uint32_t)max_bytes; 2132 int wr; 2133 2134 if (0 != chunkqueue_peek_data(cq, &data, &data_len, errh)) return -1; 2135 2136 /*(if partial write occurred, expect that subsequent writes will have 2137 * at least that much data available from chunkqueue_peek_data(), which 2138 * is what should happen, but is not checked here)*/ 2139 size_t lim = hctx->pending_write; 2140 if (lim && data_len > lim) data_len = lim; 2141 hctx->pending_write = 0; 2142 2143 /* 2144 * XXX: above comments modified from mod_mbedtls; should be verified 2145 */ 2146 2147 int wr_total = 0; 2148 do { 2149 size_t wr_len = data_len; 2150 wr = PR_Write(ssl, data, (PRInt32)wr_len); 2151 if (wr <= 0) { 2152 if (wr_total) chunkqueue_mark_written(cq, wr_total); 2153 return mod_nss_write_err(con, hctx, wr_len); 2154 } 2155 wr_total += wr; 2156 data += wr; 2157 } while ((data_len -= wr)); 2158 chunkqueue_mark_written(cq, wr_total); 2159 max_bytes -= wr_total; 2160 } 2161 2162 return 0; 2163 } 2164 2165 2166 static void 2167 mod_nss_SSLHandshakeCallback (PRFileDesc *fd, void *arg) 2168 { 2169 UNUSED(fd); 2170 handler_ctx *hctx = arg; 2171 hctx->handshake = 1; 2172 } 2173 2174 2175 static int 2176 connection_read_cq_ssl (connection *con, chunkqueue *cq, off_t max_bytes) 2177 { 2178 handler_ctx *hctx = con->plugin_ctx[plugin_data_singleton->id]; 2179 2180 UNUSED(max_bytes); 2181 2182 if (0 != hctx->close_notify) return mod_nss_close_notify(hctx); 2183 2184 PRFileDesc *ssl = hctx->ssl; 2185 ssize_t len; 2186 char *mem = NULL; 2187 size_t mem_len = 0; 2188 do { 2189 int pend = SSL_DataPending(ssl); 2190 if (pend < 0) { 2191 len = pend; 2192 break; 2193 } 2194 mem_len = pend < 2048 ? 2048 : (uint32_t)pend; 2195 chunk * const ckpt = cq->last; 2196 mem = chunkqueue_get_memory(cq, &mem_len); 2197 2198 len = PR_Read(ssl, mem, (PRInt32)mem_len); 2199 if (len > 0) { 2200 chunkqueue_use_memory(cq, ckpt, len); 2201 con->bytes_read += len; 2202 } else { 2203 chunkqueue_use_memory(cq, ckpt, 0); 2204 } 2205 } while (len > 0); 2206 2207 if (hctx->alpn && hctx->handshake) { 2208 if (hctx->alpn == MOD_NSS_ALPN_ACME_TLS_1) { 2209 /* Once TLS handshake is complete, return -1 to result in 2210 * CON_STATE_ERROR so that socket connection is quickly closed */ 2211 return -1; 2212 } 2213 hctx->alpn = 0; 2214 } 2215 2216 if (len < 0) { 2217 return mod_nss_read_err(con, hctx); 2218 } else if (len == 0) { 2219 con->is_readable = 0; 2220 /* the other end closed the connection -> KEEP-ALIVE */ 2221 2222 return -2; 2223 } else { 2224 return 0; 2225 } 2226 } 2227 2228 2229 CONNECTION_FUNC(mod_nss_handle_con_accept) 2230 { 2231 server_socket *srv_sock = con->srv_socket; 2232 if (!srv_sock->is_ssl) return HANDLER_GO_ON; 2233 2234 plugin_data *p = p_d; 2235 handler_ctx * const hctx = handler_ctx_init(); 2236 request_st * const r = &con->request; 2237 hctx->r = r; 2238 hctx->con = con; 2239 hctx->tmp_buf = con->srv->tmp_buf; 2240 hctx->errh = r->conf.errh; 2241 con->plugin_ctx[p->id] = hctx; 2242 2243 plugin_ssl_ctx * const s = p->ssl_ctxs + srv_sock->sidx; 2244 hctx->ssl_session_ticket = s->ssl_session_ticket; 2245 2246 con->network_read = connection_read_cq_ssl; 2247 con->network_write = connection_write_cq_ssl; 2248 con->proto_default_port = 443; /* "https" */ 2249 mod_nss_patch_config(r, &hctx->conf); 2250 2251 hctx->ssl = mod_nss_io_ctor(con->fd, s->model, r->conf.errh); 2252 if (NULL == hctx->ssl) 2253 return HANDLER_ERROR; 2254 2255 /* future: move more config from here to config model in network_init_ssl(). 2256 * Callbacks need to be set here to be able to set callback arg to hctx */ 2257 2258 if (!hctx->conf.ssl_disable_client_renegotiation 2259 && SSL_OptionSet(hctx->ssl, SSL_ENABLE_RENEGOTIATION, 2260 SSL_RENEGOTIATE_REQUIRES_XTN) < 0) { 2261 elog(r->conf.errh, __FILE__, __LINE__, "SSL_ENABLE_RENEGOTIATION"); 2262 return HANDLER_ERROR; 2263 } 2264 2265 if (SSL_ResetHandshake(hctx->ssl, PR_TRUE) < 0) { 2266 elog(r->conf.errh, __FILE__, __LINE__, "SSL_ResetHandshake()"); 2267 return HANDLER_ERROR; 2268 } 2269 2270 if (SSL_HandshakeCallback(hctx->ssl, mod_nss_SSLHandshakeCallback, hctx)<0){ 2271 elog(r->conf.errh, __FILE__, __LINE__, "SSL_HandshakeCallback()"); 2272 return HANDLER_ERROR; 2273 } 2274 2275 if (SSL_SNISocketConfigHook(hctx->ssl, mod_nss_SNI, hctx) < 0) { 2276 elog(r->conf.errh, __FILE__, __LINE__, "SSL_SNISocketConfigHook()"); 2277 return HANDLER_ERROR; 2278 } 2279 2280 if (SSL_SetNextProtoCallback(hctx->ssl, mod_nss_alpn_select_cb, hctx) < 0) { 2281 elog(r->conf.errh, __FILE__, __LINE__, "SSL_SetNextProtoCallback()"); 2282 return HANDLER_ERROR; 2283 } 2284 2285 hctx->verify_status = -1; 2286 if (hctx->conf.ssl_verifyclient) { 2287 if (SSL_AuthCertificateHook(hctx->ssl, mod_nss_verify_cb, hctx) < 0) { 2288 elog(r->conf.errh, __FILE__, __LINE__, "SSL_AuthCertificateHook()"); 2289 return HANDLER_ERROR; 2290 } 2291 CERTCertList * const certList = hctx->conf.ssl_ca_dn_file 2292 ? hctx->conf.ssl_ca_dn_file 2293 : hctx->conf.ssl_ca_file; 2294 if (NULL == certList) 2295 log_error(hctx->r->conf.errh, __FILE__, __LINE__, 2296 "NSS: can't verify client without ssl.ca-file " 2297 "for TLS server name %s", 2298 hctx->r->uri.authority.ptr); /*(might not be set yet if no SNI)*/ 2299 if (certList && SSL_SetTrustAnchors(hctx->ssl, certList) < 0) { 2300 elog(r->conf.errh, __FILE__, __LINE__, "SSL_SetTrustAnchors()"); 2301 return HANDLER_ERROR; 2302 } 2303 SSL_OptionSet(hctx->ssl, SSL_REQUEST_CERTIFICATE, PR_TRUE); 2304 SSL_OptionSet(hctx->ssl, SSL_REQUIRE_CERTIFICATE, 2305 hctx->conf.ssl_verifyclient_enforce 2306 ? SSL_REQUIRE_ALWAYS 2307 : SSL_REQUIRE_NEVER); 2308 } 2309 else { 2310 SSL_OptionSet(hctx->ssl, SSL_REQUEST_CERTIFICATE, PR_FALSE); 2311 SSL_OptionSet(hctx->ssl, SSL_REQUIRE_CERTIFICATE, SSL_REQUIRE_NEVER); 2312 } 2313 2314 return HANDLER_GO_ON; 2315 } 2316 2317 2318 static void 2319 mod_nss_detach(handler_ctx *hctx) 2320 { 2321 /* step aside from further SSL processing 2322 * (note: additional data might be buffered/discarded by this layer) 2323 * (used after handle_connection_shut_wr hook) */ 2324 /* future: might restore prior network_read and network_write fn ptrs */ 2325 mod_nss_io_detach(hctx->ssl); 2326 hctx->con->is_ssl_sock = 0; 2327 /* if called after handle_connection_shut_wr hook, shutdown SHUT_WR */ 2328 if (-1 == hctx->close_notify) shutdown(hctx->con->fd, SHUT_WR); 2329 hctx->close_notify = 1; 2330 } 2331 2332 2333 CONNECTION_FUNC(mod_nss_handle_con_shut_wr) 2334 { 2335 plugin_data *p = p_d; 2336 handler_ctx *hctx = con->plugin_ctx[p->id]; 2337 if (NULL == hctx) return HANDLER_GO_ON; 2338 2339 hctx->close_notify = -2; 2340 if (hctx->handshake) { 2341 mod_nss_close_notify(hctx); 2342 } 2343 else { 2344 mod_nss_detach(hctx); 2345 } 2346 2347 return HANDLER_GO_ON; 2348 } 2349 2350 2351 static int 2352 mod_nss_close_notify (handler_ctx *hctx) 2353 { 2354 if (1 == hctx->close_notify) return -2; 2355 2356 /* note: this sends close_notify TLS alert and calls shutdown() on fd */ 2357 switch (PR_Shutdown(hctx->ssl, PR_SHUTDOWN_SEND)) { 2358 case PR_SUCCESS: 2359 mod_nss_detach(hctx); 2360 return -2; 2361 case PR_FAILURE: 2362 default: 2363 if (PR_GetError() != PR_NOT_CONNECTED_ERROR) 2364 elog(hctx->r->conf.errh, __FILE__, __LINE__, "PR_Shutdown()"); 2365 mod_nss_detach(hctx); 2366 return -1; 2367 } 2368 } 2369 2370 2371 CONNECTION_FUNC(mod_nss_handle_con_close) 2372 { 2373 plugin_data *p = p_d; 2374 handler_ctx *hctx = con->plugin_ctx[p->id]; 2375 if (NULL != hctx) { 2376 con->plugin_ctx[p->id] = NULL; 2377 if (1 != hctx->close_notify) 2378 mod_nss_close_notify(hctx); /*(one final try)*/ 2379 handler_ctx_free(hctx); 2380 } 2381 2382 return HANDLER_GO_ON; 2383 } 2384 2385 2386 __attribute_noinline__ 2387 static void 2388 https_add_ssl_client_cert (request_st * const r, CERTCertificate *peer) 2389 { 2390 char *pem = NSSBase64_EncodeItem(NULL, NULL, 0, &peer->derCert); 2391 if (NULL == pem) return; 2392 uint32_t len = 0; 2393 for (uint32_t i = 0; pem[i]; ++i) { 2394 if (pem[i] != '\r') pem[len++] = pem[i]; /*(translate \r\n to \n)*/ 2395 } 2396 buffer * const tb = r->tmp_buf; 2397 buffer_copy_string_len(tb, CONST_STR_LEN(PEM_BEGIN_CERT"\n")); 2398 buffer_append_string_len(tb, pem, len); 2399 buffer_append_string_len(tb,CONST_STR_LEN("\n"PEM_END_CERT"\n")); 2400 http_header_env_set(r, CONST_STR_LEN("SSL_CLIENT_CERT"), CONST_BUF_LEN(tb)); 2401 PORT_Free(pem); 2402 } 2403 2404 2405 static void 2406 https_add_ssl_client_subject (request_st * const r, CERTName * const subj) 2407 { 2408 /* add components of client Subject DN */ 2409 /* not complete list; NSS does not expose enough of lib/certdb/alg1485.c 2410 * for friendly names, though we could consider using CERT_GetOidString() 2411 * and CERT_RFC1485_EscapeAndQuote() */ 2412 static const 2413 struct { const char *tag; uint32_t tlen; char *(*fn)(const CERTName *); } 2414 comp[] = { 2415 { CONST_STR_LEN("CN"), CERT_GetCommonName }, 2416 { CONST_STR_LEN("ST"), CERT_GetStateName }, 2417 { CONST_STR_LEN("O"), CERT_GetOrgName }, 2418 { CONST_STR_LEN("OU"), CERT_GetOrgUnitName }, 2419 { CONST_STR_LEN("C"), CERT_GetCountryName }, 2420 { CONST_STR_LEN("L"), CERT_GetLocalityName }, 2421 { CONST_STR_LEN("UID"), CERT_GetCertUid }, 2422 { CONST_STR_LEN("emailAddress"), CERT_GetCertEmailAddress }, 2423 { CONST_STR_LEN("DC"), CERT_GetDomainComponentName }, 2424 }; 2425 buffer * const tb = r->tmp_buf; 2426 buffer_copy_string_len(tb, CONST_STR_LEN("SSL_CLIENT_S_DN_")); 2427 for (uint32_t i = 0; i < sizeof(comp)/sizeof(*comp); ++i) { 2428 char *s = comp[i].fn(subj); 2429 if (NULL == s) continue; 2430 2431 unsigned int n; 2432 unsigned char c; 2433 for (n = 0; (c = ((unsigned char *)s)[n]); ++n) { 2434 if (c < 32 || c == 127 || (c > 128 && c < 160)) s[n] = '?'; 2435 } 2436 2437 buffer_string_set_length(tb, sizeof("SSL_CLIENT_S_DN_")-1); 2438 buffer_append_string_len(tb, comp[i].tag, comp[i].tlen); 2439 http_header_env_set(r, CONST_BUF_LEN(tb), s, n); 2440 2441 PR_Free(s); 2442 } 2443 } 2444 2445 static void 2446 https_add_ssl_client_entries (request_st * const r, handler_ctx * const hctx) 2447 { 2448 PRFileDesc *ssl = hctx->ssl; 2449 CERTCertificate *crt = NULL; 2450 buffer * const tb = r->tmp_buf; 2451 2452 if (hctx->verify_status != -1) 2453 crt = SSL_PeerCertificate(ssl); 2454 if (NULL == crt) { /* || hctx->verify_status == -1) */ 2455 /*(e.g. no cert, or verify result not available)*/ 2456 http_header_env_set(r, 2457 CONST_STR_LEN("SSL_CLIENT_VERIFY"), 2458 CONST_STR_LEN("NONE")); 2459 return; 2460 } 2461 else if (0 != hctx->verify_status) { 2462 buffer_copy_string_len(tb, CONST_STR_LEN("FAILED:")); 2463 const char *s = PR_ErrorToName(hctx->verify_status); 2464 if (s) 2465 buffer_append_string_len(tb, s, strlen(s)); 2466 buffer_append_string_len(tb, CONST_STR_LEN(":")); 2467 s = PR_ErrorToString(hctx->verify_status, PR_LANGUAGE_I_DEFAULT); 2468 buffer_append_string_len(tb, s, strlen(s)); 2469 http_header_env_set(r, 2470 CONST_STR_LEN("SSL_CLIENT_VERIFY"), 2471 CONST_BUF_LEN(tb)); 2472 CERT_DestroyCertificate(crt); 2473 return; 2474 } 2475 else { 2476 http_header_env_set(r, 2477 CONST_STR_LEN("SSL_CLIENT_VERIFY"), 2478 CONST_STR_LEN("SUCCESS")); 2479 } 2480 2481 char *s = CERT_NameToAsciiInvertible(&crt->subject, CERT_N2A_STRICT); 2482 if (s) { 2483 http_header_env_set(r, 2484 CONST_STR_LEN("SSL_CLIENT_S_DN"), 2485 s, strlen(s)); 2486 PR_Free(s); 2487 } 2488 2489 https_add_ssl_client_subject(r, &crt->subject); 2490 2491 buffer_string_set_length(tb, 0); 2492 buffer_append_uint_hex_lc(tb, DER_GetInteger(&crt->serialNumber)); 2493 http_header_env_set(r, 2494 CONST_STR_LEN("SSL_CLIENT_M_SERIAL"), 2495 CONST_BUF_LEN(tb)); 2496 2497 if (!buffer_string_is_empty(hctx->conf.ssl_verifyclient_username)) { 2498 /* pick one of the exported values as "REMOTE_USER", for example 2499 * ssl.verifyclient.username = "SSL_CLIENT_S_DN_UID" 2500 * or 2501 * ssl.verifyclient.username = "SSL_CLIENT_S_DN_emailAddress" 2502 */ 2503 const buffer *varname = hctx->conf.ssl_verifyclient_username; 2504 const buffer *vb = http_header_env_get(r, CONST_BUF_LEN(varname)); 2505 if (vb) { /* same as http_auth.c:http_auth_setenv() */ 2506 http_header_env_set(r, 2507 CONST_STR_LEN("REMOTE_USER"), 2508 CONST_BUF_LEN(vb)); 2509 http_header_env_set(r, 2510 CONST_STR_LEN("AUTH_TYPE"), 2511 CONST_STR_LEN("SSL_CLIENT_VERIFY")); 2512 } 2513 } 2514 2515 if (hctx->conf.ssl_verifyclient_export_cert) 2516 https_add_ssl_client_cert(r, crt); 2517 2518 CERT_DestroyCertificate(crt); 2519 } 2520 2521 2522 static void 2523 http_cgi_ssl_env (request_st * const r, handler_ctx * const hctx) 2524 { 2525 PRFileDesc *ssl = hctx->ssl; 2526 2527 /* (quite a bit of work just to get protocol version) 2528 * (could not find better NSS interface) */ 2529 SSLChannelInfo inf; 2530 if (SSL_GetChannelInfo(ssl, &inf, sizeof(inf)) < 0) 2531 inf.protocolVersion = 0; 2532 2533 size_t n; 2534 const char *s = NULL; 2535 switch (inf.protocolVersion) { 2536 case SSL_LIBRARY_VERSION_TLS_1_3: s="TLSv1.3";n=sizeof("TLSv1.3")-1;break; 2537 case SSL_LIBRARY_VERSION_TLS_1_2: s="TLSv1.2";n=sizeof("TLSv1.2")-1;break; 2538 case SSL_LIBRARY_VERSION_TLS_1_1: s="TLSv1.1";n=sizeof("TLSv1.1")-1;break; 2539 case SSL_LIBRARY_VERSION_TLS_1_0: s="TLSv1.0";n=sizeof("TLSv1.0")-1;break; 2540 case SSL_LIBRARY_VERSION_3_0: s="SSLv3.0";n=sizeof("SSLv3.0")-1;break; 2541 case SSL_LIBRARY_VERSION_2: s="SSLv2.0";n=sizeof("SSLv2.0")-1;break; 2542 default: break; 2543 } 2544 if (s) http_header_env_set(r, CONST_STR_LEN("SSL_PROTOCOL"), s, n); 2545 2546 char *cipher; 2547 int algkeysize; 2548 int usekeysize; 2549 if (SSL_SecurityStatus(ssl, NULL, &cipher, &algkeysize, &usekeysize, 2550 NULL, NULL) < 0) 2551 return; 2552 2553 if (cipher) { 2554 n = strlen(cipher); 2555 http_header_env_set(r, CONST_STR_LEN("SSL_CIPHER"), cipher, n); 2556 PR_Free(cipher); 2557 } 2558 2559 /* SSL_CIPHER_ALGKEYSIZE - Number of cipher bits (possible) */ 2560 /* SSL_CIPHER_USEKEYSIZE - Number of cipher bits (actually used) */ 2561 char buf[LI_ITOSTRING_LENGTH]; 2562 http_header_env_set(r, CONST_STR_LEN("SSL_CIPHER_USEKEYSIZE"), 2563 buf, li_utostrn(buf, sizeof(buf), usekeysize)); 2564 http_header_env_set(r, CONST_STR_LEN("SSL_CIPHER_ALGKEYSIZE"), 2565 buf, li_utostrn(buf, sizeof(buf), algkeysize)); 2566 } 2567 2568 2569 REQUEST_FUNC(mod_nss_handle_request_env) 2570 { 2571 plugin_data *p = p_d; 2572 /* simple flag for request_env_patched */ 2573 if (r->plugin_ctx[p->id]) return HANDLER_GO_ON; 2574 handler_ctx *hctx = r->con->plugin_ctx[p->id]; 2575 if (NULL == hctx) return HANDLER_GO_ON; 2576 r->plugin_ctx[p->id] = (void *)(uintptr_t)1u; 2577 2578 http_cgi_ssl_env(r, hctx); 2579 if (hctx->conf.ssl_verifyclient) { 2580 https_add_ssl_client_entries(r, hctx); 2581 } 2582 2583 return HANDLER_GO_ON; 2584 } 2585 2586 2587 REQUEST_FUNC(mod_nss_handle_uri_raw) 2588 { 2589 /* mod_nss must be loaded prior to mod_auth 2590 * if mod_nss is configured to set REMOTE_USER based on client cert */ 2591 /* mod_nss must be loaded after mod_extforward 2592 * if mod_nss config is based on lighttpd.conf remote IP conditional 2593 * using remote IP address set by mod_extforward, *unless* PROXY protocol 2594 * is enabled with extforward.hap-PROXY = "enable", in which case the 2595 * reverse is true: mod_extforward must be loaded after mod_nss */ 2596 plugin_data *p = p_d; 2597 handler_ctx *hctx = r->con->plugin_ctx[p->id]; 2598 if (NULL == hctx) return HANDLER_GO_ON; 2599 2600 mod_nss_patch_config(r, &hctx->conf); 2601 if (hctx->conf.ssl_verifyclient) { 2602 mod_nss_handle_request_env(r, p); 2603 } 2604 2605 return HANDLER_GO_ON; 2606 } 2607 2608 2609 REQUEST_FUNC(mod_nss_handle_request_reset) 2610 { 2611 plugin_data *p = p_d; 2612 r->plugin_ctx[p->id] = NULL; /* simple flag for request_env_patched */ 2613 return HANDLER_GO_ON; 2614 } 2615 2616 2617 TRIGGER_FUNC(mod_nss_handle_trigger) { 2618 const plugin_data * const p = p_d; 2619 const time_t cur_ts = log_epoch_secs; 2620 if (cur_ts & 0x3f) return HANDLER_GO_ON; /*(continue once each 64 sec)*/ 2621 2622 mod_nss_refresh_stapling_files(srv, p, cur_ts); 2623 2624 return HANDLER_GO_ON; 2625 } 2626 2627 2628 int mod_nss_plugin_init (plugin *p); 2629 int mod_nss_plugin_init (plugin *p) 2630 { 2631 p->version = LIGHTTPD_VERSION_ID; 2632 p->name = "nss"; 2633 p->init = mod_nss_init; 2634 p->cleanup = mod_nss_free; 2635 p->priv_defaults= mod_nss_set_defaults; 2636 2637 p->handle_connection_accept = mod_nss_handle_con_accept; 2638 p->handle_connection_shut_wr = mod_nss_handle_con_shut_wr; 2639 p->handle_connection_close = mod_nss_handle_con_close; 2640 p->handle_uri_raw = mod_nss_handle_uri_raw; 2641 p->handle_request_env = mod_nss_handle_request_env; 2642 p->handle_request_reset = mod_nss_handle_request_reset; 2643 p->handle_trigger = mod_nss_handle_trigger; 2644 2645 return 0; 2646 } 2647 2648 2649 static int 2650 mod_nss_ssl_conf_curves(server *srv, plugin_config_socket *s, const buffer *curvelist) 2651 { 2652 log_error(srv->errh, __FILE__, __LINE__, 2653 "NSS: ignoring Curves/Groups; not implemented (%s)", 2654 curvelist->ptr); 2655 UNUSED(s); 2656 UNUSED(curvelist); 2657 2658 /* XXX: TODO: see ssl/sslt.h enum SSLNamedGroup */ 2659 2660 return 1; 2661 } 2662 2663 2664 static PRUint16 2665 mod_nss_ssl_conf_proto_val (server *srv, plugin_config_socket *s, const buffer *b, int max) 2666 { 2667 /* use of SSL v3 should be avoided, and SSL v2 is not supported here */ 2668 /*(choosing not to support s->ssl_use_sslv2 or SSL_LIBRARY_VERSION_2 here)*/ 2669 if (NULL == b) /* default: min TLSv1.2, max TLSv1.3 */ 2670 return max ? SSL_LIBRARY_VERSION_TLS_1_3 : SSL_LIBRARY_VERSION_TLS_1_2; 2671 else if (buffer_eq_icase_slen(b, CONST_STR_LEN("None"))) /*"disable" limit*/ 2672 return max 2673 ? SSL_LIBRARY_VERSION_TLS_1_3 2674 : (s->ssl_use_sslv3 2675 ? SSL_LIBRARY_VERSION_3_0 2676 : SSL_LIBRARY_VERSION_TLS_1_0); 2677 else if (buffer_eq_icase_slen(b, CONST_STR_LEN("SSLv3"))) 2678 return SSL_LIBRARY_VERSION_3_0; 2679 else if (buffer_eq_icase_slen(b, CONST_STR_LEN("TLSv1.0"))) 2680 return SSL_LIBRARY_VERSION_TLS_1_0; 2681 else if (buffer_eq_icase_slen(b, CONST_STR_LEN("TLSv1.1"))) 2682 return SSL_LIBRARY_VERSION_TLS_1_1; 2683 else if (buffer_eq_icase_slen(b, CONST_STR_LEN("TLSv1.2"))) 2684 return SSL_LIBRARY_VERSION_TLS_1_2; 2685 else if (buffer_eq_icase_slen(b, CONST_STR_LEN("TLSv1.3"))) 2686 return SSL_LIBRARY_VERSION_TLS_1_3; 2687 else { 2688 if (buffer_eq_icase_slen(b, CONST_STR_LEN("DTLSv1")) 2689 || buffer_eq_icase_slen(b, CONST_STR_LEN("DTLSv1.2"))) 2690 log_error(srv->errh, __FILE__, __LINE__, 2691 "NSS: ssl.openssl.ssl-conf-cmd %s %s ignored", 2692 max ? "MaxProtocol" : "MinProtocol", b->ptr); 2693 else 2694 log_error(srv->errh, __FILE__, __LINE__, 2695 "NSS: ssl.openssl.ssl-conf-cmd %s %s invalid; ignored", 2696 max ? "MaxProtocol" : "MinProtocol", b->ptr); 2697 } 2698 return max ? SSL_LIBRARY_VERSION_TLS_1_3 : SSL_LIBRARY_VERSION_TLS_1_2; 2699 } 2700 2701 2702 static void 2703 mod_nss_ssl_conf_proto (server *srv, plugin_config_socket *s, const buffer *minb, const buffer *maxb) 2704 { 2705 s->protos.min = mod_nss_ssl_conf_proto_val(srv, s, minb, 0); 2706 s->protos.max = mod_nss_ssl_conf_proto_val(srv, s, maxb, 1); 2707 /* XXX: could check values against SSL_VersionRangeGetSupported() */ 2708 } 2709 2710 2711 /** 2712 * Apache mod_nss 2713 * https://pagure.io/mod_nss.git 2714 * 2715 * (with minor modifications to compile in lighttpd) 2716 */ 2717 2718 #define ap_log_error(APLOG_MARK, APLOG_INFO, rc, errh, ...) \ 2719 log_error(errh, __FILE__, __LINE__, __VA_ARGS__) 2720 typedef log_error_st server_rec; 2721 2722 2723 /* 2724 * mod_nss/nss_engine_cipher.h 2725 */ 2726 2727 /* Copyright 2001-2004 The Apache Software Foundation 2728 * 2729 * Licensed under the Apache License, Version 2.0 (the "License"); 2730 * you may not use this file except in compliance with the License. 2731 * You may obtain a copy of the License at 2732 * 2733 * http://www.apache.org/licenses/LICENSE-2.0 2734 * 2735 * Unless required by applicable law or agreed to in writing, software 2736 * distributed under the License is distributed on an "AS IS" BASIS, 2737 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 2738 * See the License for the specific language governing permissions and 2739 * limitations under the License. 2740 */ 2741 2742 /* 2743 * Cipher definitions 2744 */ 2745 typedef struct 2746 { 2747 const char *name; /* The mod_nss cipher name */ 2748 PRInt32 num; /* The cipher id */ 2749 const char *openssl_name; /* The OpenSSL cipher name */ 2750 PRInt32 attr; /* cipher attributes: algorithms, etc */ 2751 PRInt32 version; /* protocol version valid for this cipher */ 2752 PRInt32 strength; /* LOW, MEDIUM, HIGH */ 2753 PRInt32 bits; /* bits of strength */ 2754 PRInt32 alg_bits; /* bits of the algorithm */ 2755 const char *alias; /* Other names, usually typos. Right now a 2756 single string but could be CSV */ 2757 } cipher_properties; 2758 2759 /* OpenSSL-compatible cipher attributes */ 2760 #define SSL_kRSA 0x00000001L 2761 #define SSL_aRSA 0x00000002L 2762 #define SSL_aDSS 0x00000004L 2763 #define SSL_DSS SSL_aDSS 2764 #define SSL_eNULL 0x00000008L 2765 #define SSL_DES 0x00000010L 2766 #define SSL_3DES 0x00000020L 2767 #define SSL_RC4 0x00000040L 2768 #define SSL_RC2 0x00000080L 2769 #define SSL_MD5 0x00000200L 2770 #define SSL_SHA1 0x00000400L 2771 #define SSL_SHA SSL_SHA1 2772 #define SSL_RSA (SSL_kRSA) 2773 #define SSL_kEDH 0x00000800L 2774 #define SSL_EDH (SSL_kDHE) 2775 #define SSL_aNULL 0x00001000L 2776 #define SSL_kECDHE 0x00002000L 2777 #define SSL_AECDH 0x00004000L 2778 #define SSL_aECDSA 0x00008000L 2779 #define SSL_kECDHr 0x00010000L 2780 #define SSL_kEECDH 0x00020000L 2781 #define SSL_ECDH (SSL_kECDHE|SSL_kECDHr|SSL_kEECDH) 2782 #define SSL_EECDH (SSL_kEECDH) 2783 #define SSL_ADH (SSL_kEDH) 2784 #define SSL_kDHE 0x00040000L 2785 #define SSL_DHE (SSL_kDHE) 2786 2787 /* cipher strength */ 2788 #define SSL_STRONG_NONE 0x00000001L 2789 #define SSL_NULL 0x00000002L 2790 #define SSL_EXPORT40 0x00000004L 2791 #define SSL_EXPORT56 0x00000008L 2792 #define SSL_LOW 0x00000010L 2793 #define SSL_MEDIUM 0x00000020L 2794 #define SSL_HIGH 0x00000040L 2795 2796 #define SSL_CHACHA20POLY1305 0x00080000L 2797 #define SSL_AES128 0x00400000L 2798 #define SSL_AES256 0x00800000L 2799 #define SSL_CAMELLIA128 0x01000000L 2800 #define SSL_CAMELLIA256 0x02000000L 2801 #define SSL_AES128GCM 0x04000000L 2802 #define SSL_AES256GCM 0x08000000L 2803 #define SSL_SHA256 0x10000000L 2804 #define SSL_SHA384 0x20000000L 2805 #define SSL_AEAD 0x40000000L 2806 2807 #define SSL_AES (SSL_AES128|SSL_AES256|SSL_AES128GCM|SSL_AES256GCM) 2808 #define SSL_CAMELLIA (SSL_CAMELLIA128|SSL_CAMELLIA256) 2809 2810 /* Protocols */ 2811 #define SSLV2 0x00000001L 2812 #define SSLV3 0x00000002L 2813 #define TLSV1 SSLV3 2814 #define TLSV1_2 0x00000004L 2815 #define TLSV1_3 0x00000005L 2816 2817 #if 0 2818 /* the table itself is defined in nss_engine_cipher.c */ 2819 #if 0 2820 #ifdef NSS_ENABLE_ECC 2821 # ifdef ENABLE_SHA384 2822 # define ciphernum 54 2823 # else 2824 # define ciphernum 49 2825 # endif 2826 #else 2827 #define ciphernum 20 2828 #endif 2829 #endif 2830 2831 extern int ciphernum; 2832 2833 /* function prototypes */ 2834 int nss_parse_ciphers(server_rec *s, char *ciphers, PRBool cipher_list[ciphernum]); 2835 int countciphers(PRBool cipher_state[ciphernum], int version); 2836 #endif 2837 2838 /* I chose an arbitrary cipher to test the existence for to handle older 2839 * versions of NSS, at least back to 3.15.1 2840 */ 2841 #ifndef TLS_NULL_WITH_NULL_NULL 2842 #define TLS_NULL_WITH_NULL_NULL SSL_NULL_WITH_NULL_NULL 2843 #define TLS_RSA_WITH_NULL_MD5 SSL_RSA_WITH_NULL_MD5 2844 #define TLS_RSA_WITH_NULL_SHA SSL_RSA_WITH_NULL_SHA 2845 #define TLS_RSA_EXPORT_WITH_RC4_40_MD5 SSL_RSA_EXPORT_WITH_RC4_40_MD5 2846 #define TLS_RSA_WITH_RC4_128_MD5 SSL_RSA_WITH_RC4_128_MD5 2847 #define TLS_RSA_WITH_RC4_128_SHA SSL_RSA_WITH_RC4_128_SHA 2848 #define TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5 SSL_RSA_EXPORT_WITH_RC2_CBC_40_MD5 2849 #define TLS_RSA_WITH_IDEA_CBC_SHA SSL_RSA_WITH_IDEA_CBC_SHA 2850 #define TLS_RSA_EXPORT_WITH_DES40_CBC_SHA SSL_RSA_EXPORT_WITH_DES40_CBC_SHA 2851 #define TLS_RSA_WITH_DES_CBC_SHA SSL_RSA_WITH_DES_CBC_SHA 2852 #define TLS_RSA_WITH_3DES_EDE_CBC_SHA SSL_RSA_WITH_3DES_EDE_CBC_SHA 2853 #endif 2854 2855 2856 /* 2857 * mod_nss/nss_engine_cipher.c 2858 */ 2859 2860 /* Copyright 2001-2004 The Apache Software Foundation 2861 * 2862 * Licensed under the Apache License, Version 2.0 (the "License"); 2863 * you may not use this file except in compliance with the License. 2864 * You may obtain a copy of the License at 2865 * 2866 * http://www.apache.org/licenses/LICENSE-2.0 2867 * 2868 * Unless required by applicable law or agreed to in writing, software 2869 * distributed under the License is distributed on an "AS IS" BASIS, 2870 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 2871 * See the License for the specific language governing permissions and 2872 * limitations under the License. 2873 */ 2874 #include <sys/types.h> 2875 #include <string.h> 2876 #include <strings.h> 2877 #include <stdio.h> 2878 #include <stdlib.h> 2879 #ifndef NSS_VER_INCLUDE 2880 #include <nss/sslproto.h> 2881 #else 2882 #include <nss3/sslproto.h> 2883 #endif 2884 2885 /* Cipher actions */ 2886 #define PERMANENTLY_DISABLE_CIPHER -1 /* !CIPHER */ 2887 #define SUBTRACT_CIPHER 0 /* -CIPHER */ 2888 #define ENABLE_CIPHER 1 /* CIPHER */ 2889 #define REORDER_CIPHER 2 /* +CIPHER */ 2890 2891 ///* ciphernum is defined in nss_engine_cipher.h */ 2892 static const cipher_properties ciphers_def[] = 2893 { 2894 {"rsa_null_md5", TLS_RSA_WITH_NULL_MD5, "NULL-MD5", SSL_kRSA|SSL_aRSA|SSL_eNULL|SSL_MD5, SSLV3, SSL_STRONG_NONE, 0, 0, NULL}, 2895 {"rsa_null_sha", TLS_RSA_WITH_NULL_SHA, "NULL-SHA", SSL_kRSA|SSL_aRSA|SSL_eNULL|SSL_SHA1, SSLV3, SSL_STRONG_NONE, 0, 0, NULL}, 2896 {"rsa_rc4_40_md5", TLS_RSA_EXPORT_WITH_RC4_40_MD5, "EXP-RC4-MD5", SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_MD5, SSLV3, SSL_EXPORT40, 40, 128, NULL}, 2897 {"rsa_rc4_128_md5", TLS_RSA_WITH_RC4_128_MD5, "RC4-MD5", SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_MD5, SSLV3, SSL_MEDIUM, 128, 128, NULL}, 2898 {"rsa_rc4_128_sha", TLS_RSA_WITH_RC4_128_SHA, "RC4-SHA", SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_SHA1, SSLV3, SSL_MEDIUM, 128, 128, NULL}, 2899 {"rsa_rc2_40_md5", TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5, "EXP-RC2-CBC-MD5", SSL_kRSA|SSL_aRSA|SSL_RC2|SSL_MD5, SSLV3, SSL_EXPORT40, 40, 128, NULL}, 2900 /* TLS_RSA_EXPORT_WITH_DES40_CBC_SHA not implemented 0x0008 */ 2901 {"rsa_des_sha", TLS_RSA_WITH_DES_CBC_SHA, "DES-CBC-SHA", SSL_kRSA|SSL_aRSA|SSL_DES|SSL_SHA1, SSLV3, SSL_LOW, 56, 56, NULL}, 2902 {"rsa_3des_sha", TLS_RSA_WITH_3DES_EDE_CBC_SHA, "DES-CBC3-SHA", SSL_kRSA|SSL_aRSA|SSL_3DES|SSL_SHA1, SSLV3, SSL_MEDIUM, 168, 168, NULL}, 2903 //#ifdef ENABLE_SERVER_DHE 2904 {"dhe_rsa_des_sha", TLS_DHE_RSA_WITH_DES_CBC_SHA, "EDH-RSA-DES-CBC-SHA", SSL_kDHE|SSL_aRSA|SSL_DES|SSL_SHA1, SSLV3, SSL_LOW, 56, 56, NULL}, 2905 //#endif 2906 {"rsa_aes_128_sha", TLS_RSA_WITH_AES_128_CBC_SHA, "AES128-SHA", SSL_kRSA|SSL_aRSA|SSL_AES128|SSL_SHA1, TLSV1, SSL_HIGH, 128, 128, NULL}, 2907 {"rsa_aes_256_sha", TLS_RSA_WITH_AES_256_CBC_SHA, "AES256-SHA", SSL_kRSA|SSL_aRSA|SSL_AES256|SSL_SHA1, TLSV1, SSL_HIGH, 256, 256, NULL}, 2908 {"null_sha_256", TLS_RSA_WITH_NULL_SHA256, "NULL-SHA256", SSL_kRSA|SSL_aRSA|SSL_eNULL|SSL_SHA256, TLSV1_2, SSL_STRONG_NONE, 0, 0, NULL}, 2909 {"aes_128_sha_256", TLS_RSA_WITH_AES_128_CBC_SHA256, "AES128-SHA256", SSL_kRSA|SSL_aRSA|SSL_AES128|SSL_SHA256, TLSV1_2, SSL_HIGH, 128, 128, NULL}, 2910 {"aes_256_sha_256", TLS_RSA_WITH_AES_256_CBC_SHA256, "AES256-SHA256", SSL_kRSA|SSL_aRSA|SSL_AES256|SSL_SHA256, TLSV1_2, SSL_HIGH, 256, 256, NULL}, 2911 {"camellia_128_sha", TLS_RSA_WITH_CAMELLIA_128_CBC_SHA, "CAMELLIA128-SHA", SSL_kRSA|SSL_aRSA|SSL_CAMELLIA128|SSL_SHA1, TLSV1, SSL_HIGH, 128, 128, "camelia_128_sha"}, 2912 {"rsa_des_56_sha", TLS_RSA_EXPORT1024_WITH_DES_CBC_SHA, "EXP1024-DES-CBC-SHA", SSL_kRSA|SSL_aRSA|SSL_DES|SSL_SHA1, TLSV1, SSL_EXPORT56, 56, 56, NULL}, 2913 {"rsa_rc4_56_sha", TLS_RSA_EXPORT1024_WITH_RC4_56_SHA, "EXP1024-RC4-SHA", SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_SHA1, TLSV1, SSL_EXPORT56, 56, 128, NULL}, 2914 {"camellia_256_sha", TLS_RSA_WITH_CAMELLIA_256_CBC_SHA, "CAMELLIA256-SHA", SSL_kRSA|SSL_aRSA|SSL_CAMELLIA256|SSL_SHA1, TLSV1, SSL_HIGH, 256, 256, "camelia_256_sha"}, 2915 //#ifdef ENABLE_GCM 2916 {"rsa_aes_128_gcm_sha_256", TLS_RSA_WITH_AES_128_GCM_SHA256, "AES128-GCM-SHA256", SSL_kRSA|SSL_aRSA|SSL_AES128GCM|SSL_AEAD, TLSV1_2, SSL_HIGH, 128, 128, NULL}, 2917 //#endif 2918 //#ifdef ENABLE_SHA384 2919 {"rsa_aes_256_gcm_sha_384", TLS_RSA_WITH_AES_256_GCM_SHA384, "AES256-GCM-SHA384", SSL_kRSA|SSL_aRSA|SSL_AES256GCM|SSL_AEAD, TLSV1_2, SSL_HIGH, 256, 256, NULL}, 2920 //#endif 2921 {"fips_3des_sha", SSL_RSA_FIPS_WITH_3DES_EDE_CBC_SHA, "FIPS-DES-CBC3-SHA", SSL_kRSA|SSL_aRSA|SSL_3DES|SSL_SHA1, SSLV3, SSL_MEDIUM, 112, 168, NULL}, 2922 {"fips_des_sha", SSL_RSA_FIPS_WITH_DES_CBC_SHA, "FIPS-DES-CBC-SHA", SSL_kRSA|SSL_aRSA|SSL_DES|SSL_SHA1, SSLV3, SSL_LOW, 56, 56, NULL}, 2923 //#ifdef ENABLE_SERVER_DHE 2924 {"dhe_rsa_3des_sha", TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA, "DHE-RSA-DES-CBC3-SHA", SSL_kDHE|SSL_aRSA|SSL_3DES|SSL_SHA1, TLSV1, SSL_MEDIUM, 112, 168, NULL}, 2925 {"dhe_rsa_aes_128_sha", TLS_DHE_RSA_WITH_AES_128_CBC_SHA, "DHE-RSA-AES128-SHA", SSL_kDHE|SSL_aRSA|SSL_AES128|SSL_SHA1, TLSV1, SSL_HIGH, 128, 128, NULL}, 2926 {"dhe_rsa_aes_256_sha", TLS_DHE_RSA_WITH_AES_256_CBC_SHA, "DHE-RSA-AES256-SHA", SSL_kDHE|SSL_aRSA|SSL_AES256|SSL_SHA1, TLSV1, SSL_HIGH, 256, 256, NULL}, 2927 {"dhe_rsa_camellia_128_sha", TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA, "DHE-RSA-CAMELLIA128-SHA", SSL_kDHE|SSL_aRSA|SSL_CAMELLIA128|SSL_SHA1, TLSV1, SSL_HIGH, 128, 128, NULL}, 2928 {"dhe_rsa_camellia_256_sha", TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA, "DHE-RSA-CAMELLIA256-SHA", SSL_kDHE|SSL_aRSA|SSL_CAMELLIA256|SSL_SHA1, TLSV1, SSL_HIGH, 256, 256, NULL}, 2929 {"dhe_rsa_aes_128_sha_256", TLS_DHE_RSA_WITH_AES_128_CBC_SHA256, "DHE-RSA-AES128-SHA256", SSL_kDHE|SSL_aRSA|SSL_AES128|SSL_SHA256, TLSV1_2, SSL_HIGH, 128, 128, "dhe_rsa_aes_128_sha256"}, 2930 {"dhe_rsa_aes_256_sha_256", TLS_DHE_RSA_WITH_AES_256_CBC_SHA256, "DHE-RSA-AES256-SHA256", SSL_kDHE|SSL_aRSA|SSL_AES256|SSL_SHA256, TLSV1_2, SSL_HIGH, 256, 256, "dhe_rsa_aes_256_sha256"}, 2931 //#ifdef ENABLE_GCM 2932 {"dhe_rsa_aes_128_gcm_sha_256", TLS_DHE_RSA_WITH_AES_128_GCM_SHA256, "DHE-RSA-AES128-GCM-SHA256", SSL_kDHE|SSL_aRSA|SSL_AES128GCM|SSL_AEAD, TLSV1_2, SSL_HIGH, 128, 128, NULL}, 2933 //#endif 2934 //#ifdef ENABLE_SHA384 2935 {"dhe_rsa_aes_256_gcm_sha_384", TLS_DHE_RSA_WITH_AES_256_GCM_SHA384, "DHE-RSA-AES256-GCM-SHA384", SSL_kDHE|SSL_aRSA|SSL_AES256GCM|SSL_AEAD, TLSV1_2, SSL_HIGH, 256, 256, NULL}, 2936 //#endif 2937 //#endif /* ENABLE_SERVER_DHE */ 2938 //#ifdef NSS_ENABLE_ECC 2939 {"ecdh_ecdsa_null_sha", TLS_ECDH_ECDSA_WITH_NULL_SHA, "ECDH-ECDSA-NULL-SHA", SSL_kECDHE|SSL_AECDH|SSL_eNULL|SSL_SHA1, TLSV1, SSL_STRONG_NONE, 0, 0, NULL}, 2940 {"ecdh_ecdsa_rc4_128_sha", TLS_ECDH_ECDSA_WITH_RC4_128_SHA, "ECDH-ECDSA-RC4-SHA", SSL_kECDHE|SSL_AECDH|SSL_RC4|SSL_SHA1, TLSV1, SSL_MEDIUM, 128, 128, NULL}, 2941 {"ecdh_ecdsa_3des_sha", TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA, "ECDH-ECDSA-DES-CBC3-SHA", SSL_kECDHE|SSL_AECDH|SSL_3DES|SSL_SHA1, TLSV1, SSL_MEDIUM, 112, 168, NULL}, 2942 {"ecdh_ecdsa_aes_128_sha", TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, "ECDH-ECDSA-AES128-SHA", SSL_kECDHE|SSL_AECDH|SSL_AES128|SSL_SHA1, TLSV1, SSL_HIGH, 128, 128, NULL}, 2943 {"ecdh_ecdsa_aes_256_sha", TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA, "ECDH-ECDSA-AES256-SHA", SSL_kECDHE|SSL_AECDH|SSL_AES256|SSL_SHA1, TLSV1, SSL_HIGH, 256, 256, NULL}, 2944 {"ecdhe_ecdsa_null_sha", TLS_ECDHE_ECDSA_WITH_NULL_SHA, "ECDHE-ECDSA-NULL-SHA", SSL_kEECDH|SSL_aECDSA|SSL_eNULL|SSL_SHA1, TLSV1, SSL_STRONG_NONE, 0, 0, NULL}, 2945 {"ecdhe_ecdsa_rc4_128_sha", TLS_ECDHE_ECDSA_WITH_RC4_128_SHA, "ECDHE-ECDSA-RC4-SHA", SSL_kEECDH|SSL_aECDSA|SSL_RC4|SSL_SHA1, TLSV1, SSL_MEDIUM, 128, 128, NULL}, 2946 {"ecdhe_ecdsa_3des_sha", TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, "ECDHE-ECDSA-DES-CBC3-SHA", SSL_kEECDH|SSL_aECDSA|SSL_3DES|SSL_SHA1, TLSV1, SSL_MEDIUM, 112, 168, NULL}, 2947 {"ecdhe_ecdsa_aes_128_sha", TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, "ECDHE-ECDSA-AES128-SHA", SSL_kEECDH|SSL_aECDSA|SSL_AES128|SSL_SHA1, TLSV1, SSL_HIGH, 128, 128, NULL}, 2948 {"ecdhe_ecdsa_aes_256_sha", TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, "ECDHE-ECDSA-AES256-SHA", SSL_kEECDH|SSL_aECDSA|SSL_AES256|SSL_SHA1, TLSV1, SSL_HIGH, 256, 256, NULL}, 2949 {"ecdh_rsa_null_sha", TLS_ECDH_RSA_WITH_NULL_SHA, "ECDH-RSA-NULL-SHA", SSL_kECDHr|SSL_AECDH|SSL_eNULL|SSL_SHA1, TLSV1, SSL_STRONG_NONE, 0, 0, NULL}, 2950 {"ecdh_rsa_128_sha", TLS_ECDH_RSA_WITH_RC4_128_SHA, "ECDH-RSA-RC4-SHA", SSL_kECDHr|SSL_AECDH|SSL_RC4|SSL_SHA1, TLSV1, SSL_MEDIUM, 128, 128, NULL}, 2951 {"ecdh_rsa_3des_sha", TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA, "ECDH-RSA-DES-CBC3-SHA", SSL_kECDHr|SSL_AECDH|SSL_3DES|SSL_SHA1, TLSV1, SSL_MEDIUM, 112, 168, NULL}, 2952 {"ecdh_rsa_aes_128_sha", TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, "ECDH-RSA-AES128-SHA", SSL_kECDHr|SSL_AECDH|SSL_AES128|SSL_SHA1, TLSV1, SSL_HIGH, 128, 128, NULL}, 2953 {"ecdh_rsa_aes_256_sha", TLS_ECDH_RSA_WITH_AES_256_CBC_SHA, "ECDH-RSA-AES256-SHA", SSL_kECDHr|SSL_AECDH|SSL_AES256|SSL_SHA1, TLSV1, SSL_HIGH, 256, 256, NULL}, 2954 {"ecdhe_rsa_null", TLS_ECDHE_RSA_WITH_NULL_SHA, "ECDHE-RSA-NULL-SHA", SSL_kEECDH|SSL_aRSA|SSL_eNULL|SSL_SHA1, TLSV1, SSL_STRONG_NONE, 0, 0, NULL}, 2955 {"ecdhe_rsa_rc4_128_sha", TLS_ECDHE_RSA_WITH_RC4_128_SHA, "ECDHE-RSA-RC4-SHA", SSL_kEECDH|SSL_aRSA|SSL_RC4|SSL_SHA1, TLSV1, SSL_MEDIUM, 128, 128, NULL}, 2956 {"ecdhe_rsa_3des_sha", TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, "ECDHE-RSA-DES-CBC3-SHA", SSL_kEECDH|SSL_aRSA|SSL_3DES|SSL_SHA1, TLSV1, SSL_MEDIUM, 112, 168, NULL}, 2957 {"ecdhe_rsa_aes_128_sha", TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, "ECDHE-RSA-AES128-SHA", SSL_kEECDH|SSL_aRSA|SSL_AES128|SSL_SHA1, TLSV1, SSL_HIGH, 128, 128, NULL}, 2958 {"ecdhe_rsa_aes_256_sha", TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, "ECDHE-RSA-AES256-SHA", SSL_kEECDH|SSL_aRSA|SSL_AES256|SSL_SHA1, TLSV1, SSL_HIGH, 256, 256, NULL}, 2959 {"ecdh_anon_null_sha", TLS_ECDH_anon_WITH_NULL_SHA, "AECDH-NULL-SHA", SSL_kEECDH|SSL_aNULL|SSL_eNULL|SSL_SHA1, TLSV1, SSL_STRONG_NONE, 0, 0, NULL}, 2960 {"ecdh_anon_rc4_128sha", TLS_ECDH_anon_WITH_RC4_128_SHA, "AECDH-RC4-SHA", SSL_kEECDH|SSL_aNULL|SSL_RC4|SSL_SHA1, TLSV1, SSL_MEDIUM, 128, 128, NULL}, 2961 {"ecdh_anon_3des_sha", TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA, "AECDH-DES-CBC3-SHA", SSL_kEECDH|SSL_aNULL|SSL_3DES|SSL_SHA1, TLSV1, SSL_MEDIUM, 112, 168, NULL}, 2962 {"ecdh_anon_aes_128_sha", TLS_ECDH_anon_WITH_AES_128_CBC_SHA, "AECDH-AES128-SHA", SSL_kEECDH|SSL_aNULL|SSL_AES128|SSL_SHA1, TLSV1, SSL_HIGH, 128, 128, NULL}, 2963 {"ecdh_anon_aes_256_sha", TLS_ECDH_anon_WITH_AES_256_CBC_SHA, "AECDH-AES256-SHA", SSL_kEECDH|SSL_aNULL|SSL_AES256|SSL_SHA1, TLSV1, SSL_HIGH, 256, 256, NULL}, 2964 {"ecdhe_ecdsa_aes_128_sha_256", TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, "ECDHE-ECDSA-AES128-SHA256", SSL_kEECDH|SSL_aECDSA|SSL_AES128|SSL_SHA256, TLSV1_2, SSL_HIGH, 128, 128, NULL}, 2965 {"ecdhe_rsa_aes_128_sha_256", TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, "ECDHE-RSA-AES128-SHA256", SSL_kEECDH|SSL_aRSA|SSL_AES128|SSL_SHA256, TLSV1_2, SSL_HIGH, 128, 128, NULL}, 2966 //#ifdef ENABLE_GCM 2967 {"ecdhe_ecdsa_aes_128_gcm_sha_256", TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, "ECDHE-ECDSA-AES128-GCM-SHA256", SSL_kEECDH|SSL_aECDSA|SSL_AES128GCM|SSL_AEAD, TLSV1_2, SSL_HIGH, 128, 128, NULL}, 2968 //#endif 2969 //#ifdef ENABLE_SHA384 2970 {"ecdhe_ecdsa_aes_256_sha_384", TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, "ECDHE-ECDSA-AES256-SHA384", SSL_kEECDH|SSL_aECDSA|SSL_AES256|SSL_SHA384, TLSV1_2, SSL_HIGH, 256, 256, NULL}, 2971 {"ecdhe_rsa_aes_256_sha_384", TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, "ECDHE-RSA-AES256-SHA384", SSL_kEECDH|SSL_aRSA|SSL_AES256|SSL_SHA384, TLSV1_2, SSL_HIGH, 256, 256, NULL}, 2972 {"ecdhe_ecdsa_aes_256_gcm_sha_384", TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, "ECDHE-ECDSA-AES256-GCM-SHA384", SSL_kEECDH|SSL_aECDSA|SSL_AES256GCM|SSL_AEAD, TLSV1_2, SSL_HIGH, 256, 256, NULL}, 2973 {"ecdhe_rsa_aes_256_gcm_sha_384", TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, "ECDHE-RSA-AES256-GCM-SHA384", SSL_kEECDH|SSL_aRSA|SSL_AES256GCM|SSL_AEAD, TLSV1_2, SSL_HIGH, 256, 256, NULL}, 2974 //#endif 2975 //#ifdef ENABLE_GCM 2976 {"ecdhe_rsa_aes_128_gcm_sha_256", TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, "ECDHE-RSA-AES128-GCM-SHA256", SSL_kEECDH|SSL_aRSA|SSL_AES128GCM|SSL_AEAD, TLSV1_2, SSL_HIGH, 128, 128, NULL}, 2977 //#endif 2978 /* TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256 is not implemented */ 2979 /* TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256 is not implemented */ 2980 /* TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256 is not implemented */ 2981 /* TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256 is not implemented */ 2982 //#endif 2983 //#ifdef ENABLE_CHACHA20 2984 {"ecdhe_rsa_chacha20_poly1305_sha_256", TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256, "ECDHE-RSA-CHACHA20-POLY1305", SSL_kEECDH|SSL_aRSA|SSL_CHACHA20POLY1305|SSL_AEAD, TLSV1_2, SSL_HIGH, 256, 256, NULL}, 2985 {"ecdhe_ecdsa_chacha20_poly1305_sha_256", TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, "ECDHE-ECDSA-CHACHA20-POLY1305", SSL_kEECDH|SSL_aECDSA|SSL_CHACHA20POLY1305|SSL_AEAD, TLSV1_2, SSL_HIGH, 256, 256, NULL}, 2986 {"dhe_rsa_chacha20_poly1305_sha_256", TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256, "DHE-RSA-CHACHA20-POLY1305", SSL_kDHE|SSL_aRSA|SSL_CHACHA20POLY1305|SSL_AEAD, TLSV1_2, SSL_HIGH, 256, 256, NULL}, 2987 //#endif 2988 //#ifdef NSS_SUPPORTS_TLS_1_3 2989 /* Special TLS 1.3 cipher suites that really just specify AEAD 2990 * TLS 1.3 ciphers don't specify key exchange and authentication. 2991 */ 2992 {"aes_128_gcm_sha_256", TLS_AES_128_GCM_SHA256, "TLS-AES-128-GCM-SHA256", SSL_AES128GCM|SSL_AEAD, TLSV1_3, SSL_HIGH, 128, 128, NULL}, 2993 {"aes_256_gcm_sha_384", TLS_AES_256_GCM_SHA384, "TLS-AES-256-GCM-SHA384", SSL_AES256GCM|SSL_AEAD, TLSV1_3, SSL_HIGH, 256, 256, NULL}, 2994 {"chacha20_poly1305_sha_256", TLS_CHACHA20_POLY1305_SHA256, "TLS-CHACHA20-POLY1305_SHA256", SSL_CHACHA20POLY1305|SSL_AEAD, TLSV1_3, SSL_HIGH, 256, 256, NULL}, 2995 //#endif 2996 }; 2997 2998 #define CIPHERNUM sizeof(ciphers_def) / sizeof(cipher_properties) 2999 //static const int ciphernum = CIPHERNUM; 3000 #define ciphernum ((int)(CIPHERNUM)) 3001 3002 /* Some ciphers are optionally enabled in OpenSSL. For safety sake assume 3003 * they are not available. 3004 */ 3005 static const int skip_ciphers = 4; 3006 static const int ciphers_not_in_openssl[] = { 3007 SSL_RSA_FIPS_WITH_DES_CBC_SHA, 3008 SSL_RSA_FIPS_WITH_3DES_EDE_CBC_SHA, 3009 TLS_RSA_EXPORT1024_WITH_DES_CBC_SHA, 3010 TLS_RSA_EXPORT1024_WITH_RC4_56_SHA, 3011 }; 3012 3013 static int parse_nss_ciphers(server_rec *s, char *ciphers, PRBool cipher_list[ciphernum]); 3014 static int parse_openssl_ciphers(server_rec *s, char *ciphers, PRBool cipher_list[ciphernum]); 3015 3016 static 3017 int countciphers(PRBool cipher_state[ciphernum], int version) { 3018 int ciphercount = 0; 3019 int i = 0; 3020 3021 for (i = 0; i < ciphernum; i++) 3022 { 3023 if ((cipher_state[i] == PR_TRUE) && 3024 (ciphers_def[i].version & version)) { 3025 ciphercount++; 3026 } 3027 } 3028 3029 return ciphercount; 3030 } 3031 3032 3033 static 3034 int nss_parse_ciphers(server_rec *s, char *ciphers, PRBool cipher_list[ciphernum]) 3035 { 3036 UNUSED(s); 3037 int rv = 0; 3038 3039 /* If the string has a colon we use the OpenSSL style. If it has a 3040 * comma then NSS. If it has neither we try both. */ 3041 if (strchr(ciphers, ':')) { 3042 rv = parse_openssl_ciphers(s, ciphers, cipher_list); 3043 } else if (strchr(ciphers, ',')) { 3044 rv = parse_nss_ciphers(s, ciphers, cipher_list); 3045 } else { 3046 rv = parse_openssl_ciphers(s, ciphers, cipher_list); 3047 if (rv == 0 && 0 == countciphers(cipher_list, SSLV3|TLSV1|TLSV1_2|TLSV1_3)) { 3048 rv = parse_nss_ciphers(s, ciphers, cipher_list); 3049 } 3050 } 3051 if (0 == countciphers(cipher_list, SSLV3|TLSV1|TLSV1_2|TLSV1_3)) { 3052 ap_log_error(APLOG_MARK, APLOG_INFO, 0, s, 3053 "no cipher match"); 3054 } 3055 3056 return rv; 3057 } 3058 3059 3060 /* Given a set of ciphers perform a given action on the indexed value. 3061 * 3062 * This is needed because the + action doesn't do anything in the NSS 3063 * context. In OpenSSL it will re-order the cipher list. 3064 */ 3065 static void set_cipher_value(PRBool cipher_list[ciphernum], int index, int action) 3066 { 3067 int i; 3068 3069 if (action == REORDER_CIPHER) 3070 /* NSS doesn't allow ordering so do nothing */ 3071 return; 3072 3073 for (i = 0; i < skip_ciphers; i++) { 3074 if (ciphers_def[index].num == ciphers_not_in_openssl[i]) { 3075 cipher_list[index] = PERMANENTLY_DISABLE_CIPHER; 3076 return; 3077 } 3078 } 3079 3080 if (cipher_list[index] != PERMANENTLY_DISABLE_CIPHER) 3081 cipher_list[index] = action; 3082 } 3083 3084 3085 static int parse_openssl_ciphers(server_rec *s, char *ciphers, PRBool cipher_list[ciphernum]) 3086 { 3087 UNUSED(s); 3088 char * cipher; 3089 int i, action; 3090 PRBool merge = PR_FALSE; 3091 PRBool found = PR_FALSE; 3092 PRBool first = PR_TRUE; 3093 3094 cipher = ciphers; 3095 while (ciphers && (strlen(ciphers))) 3096 { 3097 while ((*cipher) && (isspace(*(uint8_t *)cipher))) 3098 ++cipher; 3099 3100 action = ENABLE_CIPHER; /* default to enable */ 3101 switch(*cipher) 3102 { 3103 case '+': 3104 /* Cipher ordering is not supported in NSS */ 3105 action = REORDER_CIPHER; 3106 cipher++; 3107 break; 3108 case '-': 3109 action = SUBTRACT_CIPHER; 3110 cipher++; 3111 break; 3112 case '!': 3113 action = PERMANENTLY_DISABLE_CIPHER; 3114 cipher++; 3115 break; 3116 default: 3117 /* Add the cipher */ 3118 break; 3119 } 3120 3121 if ((ciphers = strchr(cipher, ':'))) { 3122 *ciphers++ = '\0'; 3123 merge = PR_FALSE; 3124 found = PR_FALSE; 3125 } 3126 3127 if (!strcmp(cipher, "ALL")) { 3128 found = PR_TRUE; 3129 for (i=0; i<ciphernum; i++) { 3130 if (!(ciphers_def[i].attr & SSL_eNULL)) 3131 set_cipher_value(cipher_list, i, action); 3132 } 3133 } else if (!strcmp(cipher, "COMPLEMENTOFALL")) { 3134 found = PR_TRUE; 3135 for (i=0; i<ciphernum; i++) { 3136 if ((ciphers_def[i].attr & SSL_eNULL)) 3137 set_cipher_value(cipher_list, i, action); 3138 } 3139 } else if (!strcmp(cipher, "DEFAULT")) { 3140 /* In OpenSSL the default cipher list is 3141 * ALL:!aNULL:!eNULL:!SSLv2 3142 * So we need to disable all the NULL ciphers too. 3143 */ 3144 int mask = SSL_aNULL | SSL_eNULL; 3145 found = PR_TRUE; 3146 for (i=0; i < ciphernum; i++) { 3147 if (cipher_list[i] != PERMANENTLY_DISABLE_CIPHER) 3148 SSL_CipherPrefGetDefault(ciphers_def[i].num, 3149 &cipher_list[i]); 3150 if (PR_TRUE == first) { 3151 if (ciphers_def[i].attr & mask) { 3152 set_cipher_value(cipher_list, i, 3153 PERMANENTLY_DISABLE_CIPHER); 3154 } 3155 } 3156 } 3157 } else if (!strcmp(cipher, "COMPLEMENTOFDEFAULT")) { 3158 found = PR_TRUE; 3159 /* no-op. In OpenSSL this is the ADH ciphers */ 3160 } else if (!strcmp(cipher, "@STRENGTH")) { 3161 /* No cipher ordering in NSS */ 3162 ap_log_error(APLOG_MARK, APLOG_INFO, 0, s, 3163 "Cipher ordering is not supported in NSS"); 3164 return -1; 3165 } else { 3166 int amask = 0; 3167 int amaskaction = 0; 3168 int mask = 0; 3169 int strength = 0; 3170 int protocol = 0; 3171 char *c; 3172 PRBool candidate_list[ciphernum]; 3173 PRBool temp_list[ciphernum]; 3174 3175 for (i = 0; i < ciphernum; i++) { 3176 candidate_list[i] = 1; 3177 } 3178 3179 c = cipher; 3180 while (c && (strlen(c))) { 3181 amask = 0; 3182 amaskaction = 0; 3183 mask = 0; 3184 strength = 0; 3185 protocol = 0; 3186 for (i = 0; i < ciphernum; i++) { 3187 temp_list[i] = 0; 3188 } 3189 3190 if ((c = strchr(cipher, '+'))) { 3191 *c++ = '\0'; 3192 } 3193 3194 if (!strcmp(cipher, "RSA")) { 3195 mask |= SSL_RSA; 3196 } else if (!strcmp(cipher, "kRSA")) { 3197 mask |= SSL_kRSA; 3198 } else if (!strcmp(cipher, "aRSA")) { 3199 mask |= SSL_aRSA; 3200 } else if (!strcmp(cipher, "EDH")) { 3201 /* Normally this is kEDH:-ADH but since we don't 3202 * support ADH this is sufficient. 3203 */ 3204 mask |= SSL_kEDH; 3205 } else if (!strcmp(cipher, "DH")) { 3206 /* non-ephemeral DH. The ciphers are defined 3207 * but not implemented in OpenSSL so manage 3208 * this here. 3209 */ 3210 mask |= SSL_kDHE; 3211 #if 0 3212 } else if (!strcmp(cipher, "ADH")) { 3213 mask |= SSL_ADH; 3214 #endif 3215 } else if (!strcmp(cipher, "ECDH")) { 3216 mask |= SSL_ECDH; 3217 } else if (!strcmp(cipher, "EECDH")) { 3218 mask |= SSL_kEECDH; 3219 amask = SSL_aNULL; 3220 amaskaction = 1; /* filter anonymous out */ 3221 } else if (!strcmp(cipher, "AECDH")) { 3222 mask |= SSL_kEECDH; 3223 amask = SSL_aNULL; /* require anonymous */ 3224 amaskaction = 0; /* keep these */ 3225 } else if (!strcmp(cipher, "kECDH")) { 3226 mask |= SSL_kECDHE | SSL_kECDHr; 3227 } else if (!strcmp(cipher, "kECDHE")) { 3228 mask |= SSL_kECDHE; 3229 } else if (!strcmp(cipher, "kECDHr")) { 3230 mask |= SSL_kECDHr; 3231 } else if (!strcmp(cipher, "kEECDH")) { 3232 mask |= SSL_kEECDH; 3233 } else if (!strcmp(cipher, "AECDH")) { 3234 mask |= SSL_AECDH; 3235 } else if (!strcmp(cipher, "ECDSA")) { 3236 mask |= SSL_aECDSA; 3237 } else if (!strcmp(cipher, "aECDSA")) { 3238 mask |= SSL_aECDSA; 3239 } else if ((!strcmp(cipher, "NULL")) || (!strcmp(cipher, "eNULL"))) { 3240 mask |= SSL_eNULL; 3241 } else if (!strcmp(cipher, "aNULL")) { 3242 mask |= SSL_aNULL; 3243 } else if (!strcmp(cipher, "AES")) { 3244 mask |= SSL_AES; 3245 } else if (!strcmp(cipher, "AESGCM")) { 3246 mask |= SSL_AES128GCM|SSL_AES256GCM; 3247 } else if (!strcmp(cipher, "AES128")) { 3248 mask |= SSL_AES128|SSL_AES128GCM; 3249 } else if (!strcmp(cipher, "AES256")) { 3250 mask |= SSL_AES256|SSL_AES256GCM; 3251 } else if (!strcmp(cipher, "CHACHA20")) { 3252 mask |= SSL_CHACHA20POLY1305; 3253 } else if (!strcmp(cipher, "CAMELLIA")) { 3254 mask |= SSL_CAMELLIA128|SSL_CAMELLIA256; 3255 } else if (!strcmp(cipher, "CAMELLIA128")) { 3256 mask |= SSL_CAMELLIA128; 3257 } else if (!strcmp(cipher, "CAMELLIA256")) { 3258 mask |= SSL_CAMELLIA256; 3259 } else if (!strcmp(cipher, "3DES")) { 3260 mask |= SSL_3DES; 3261 } else if (!strcmp(cipher, "DES")) { 3262 mask |= SSL_DES; 3263 } else if (!strcmp(cipher, "RC4")) { 3264 mask |= SSL_RC4; 3265 } else if (!strcmp(cipher, "RC2")) { 3266 mask |= SSL_RC2; 3267 } else if (!strcmp(cipher, "MD5")) { 3268 mask |= SSL_MD5; 3269 } else if ((!strcmp(cipher, "SHA")) || (!strcmp(cipher, "SHA1"))) { 3270 mask |= SSL_SHA1; 3271 } else if (!strcmp(cipher, "SHA256")) { 3272 mask |= SSL_SHA256; 3273 } else if (!strcmp(cipher, "SHA384")) { 3274 mask |= SSL_SHA384; 3275 } else if (!strcmp(cipher, "SSLv2")) { 3276 /* no-op */ 3277 } else if (!strcmp(cipher, "SSLv3")) { 3278 protocol |= SSLV3; 3279 } else if (!strcmp(cipher, "TLSv1")) { 3280 protocol |= TLSV1; 3281 } else if (!strcmp(cipher, "TLSv1.2")) { 3282 protocol |= TLSV1_2; 3283 } else if (!strcmp(cipher, "TLSv1.3")) { 3284 protocol |= TLSV1_3; 3285 } else if (!strcmp(cipher, "HIGH")) { 3286 strength |= SSL_HIGH; 3287 } else if (!strcmp(cipher, "MEDIUM")) { 3288 strength |= SSL_MEDIUM; 3289 } else if (!strcmp(cipher, "LOW")) { 3290 strength |= SSL_LOW; 3291 } else if ((!strcmp(cipher, "EXPORT")) || (!strcmp(cipher, "EXP"))) { 3292 strength |= SSL_EXPORT40|SSL_EXPORT56; 3293 } else if (!strcmp(cipher, "EXPORT40")) { 3294 strength |= SSL_EXPORT40; 3295 } else if (!strcmp(cipher, "EXPORT56")) { 3296 strength |= SSL_EXPORT56; 3297 } 3298 3299 if (c) 3300 cipher = c; 3301 3302 /* If we have a mask, apply it. If not then perhaps they 3303 * provided a specific cipher to enable. 3304 */ 3305 if (mask || strength || protocol) { 3306 merge = PR_TRUE; 3307 found = PR_TRUE; 3308 for (i=0; i<ciphernum; i++) { 3309 if (((ciphers_def[i].attr & mask) || 3310 (ciphers_def[i].strength & strength) || 3311 (ciphers_def[i].version & protocol)) && 3312 (cipher_list[i] != PERMANENTLY_DISABLE_CIPHER)) { 3313 if (amask != 0) { 3314 PRBool match = PR_FALSE; 3315 if (ciphers_def[i].attr & amask) { 3316 match = PR_TRUE; 3317 } 3318 if (amaskaction && match) 3319 continue; 3320 if (!amaskaction && !match) 3321 continue; 3322 } 3323 #if 0 3324 /* Enable the NULL ciphers only if explicity 3325 * requested */ 3326 if (ciphers_def[i].attr & SSL_eNULL) { 3327 if (mask & SSL_eNULL) 3328 temp_list[i] = 1; 3329 } else 3330 #endif 3331 temp_list[i] = 1; 3332 } 3333 } 3334 /* Merge the temp list into the candidate list */ 3335 for (i=0; i<ciphernum; i++) { 3336 if (!(candidate_list[i] & temp_list[i])) { 3337 candidate_list[i] = 0; 3338 } 3339 } 3340 } else if (!strcmp(cipher, "FIPS")) { 3341 SSLCipherSuiteInfo suite; 3342 for (i=0; i<ciphernum;i++) { 3343 if (SSL_GetCipherSuiteInfo(ciphers_def[i].num, 3344 &suite, sizeof suite) == SECSuccess) { 3345 if (suite.isFIPS) 3346 set_cipher_value(cipher_list, i, action); 3347 } 3348 } 3349 } else { 3350 for (i=0; i<ciphernum; i++) { 3351 if (!strcmp(ciphers_def[i].openssl_name, cipher)) 3352 set_cipher_value(cipher_list, i, action); 3353 } 3354 } 3355 } /* while */ 3356 if (PR_TRUE == merge) { 3357 first = PR_FALSE; 3358 /* Merge the candidate list into the cipher list */ 3359 for (i=0; i<ciphernum; i++) { 3360 if (candidate_list[i]) 3361 set_cipher_value(cipher_list, i, action); 3362 } 3363 merge = PR_FALSE; 3364 found = PR_FALSE; 3365 } 3366 } 3367 3368 if (ciphers) 3369 cipher = ciphers; 3370 3371 } 3372 if (found && 0 == countciphers(cipher_list, SSLV3|TLSV1|TLSV1_2|TLSV1_3)) 3373 return 1; /* no matching ciphers */ 3374 return 0; 3375 } 3376 3377 3378 static int parse_nss_ciphers(server_rec *s, char *ciphers, PRBool cipher_list[ciphernum]) 3379 { 3380 UNUSED(s); 3381 char * cipher; 3382 PRBool found; 3383 int i, active; 3384 3385 cipher = ciphers; 3386 3387 while (ciphers && (strlen(ciphers))) 3388 { 3389 while ((*cipher) && (isspace(*(uint8_t *)cipher))) 3390 ++cipher; 3391 3392 switch(*cipher++) 3393 { 3394 case '+': 3395 active = PR_TRUE; 3396 break; 3397 case '-': 3398 active = PR_FALSE; 3399 break; 3400 default: 3401 ap_log_error(APLOG_MARK, APLOG_INFO, 0, s, 3402 "invalid cipher string %s. Format is +cipher1,-cipher2...", cipher - 1); 3403 return -1; 3404 } 3405 3406 if ((ciphers = strchr(cipher, ','))) { 3407 *ciphers++ = '\0'; 3408 } 3409 3410 found = PR_FALSE; 3411 3412 for (i = 0; i < ciphernum; i++) 3413 { 3414 if (!strcasecmp(cipher, ciphers_def[i].name)) 3415 { 3416 cipher_list[i] = active; 3417 found = PR_TRUE; 3418 break; 3419 } else if ((ciphers_def[i].alias != NULL) && 3420 (!strcasecmp(cipher, ciphers_def[i].alias))) 3421 { 3422 cipher_list[i] = active; 3423 found = PR_TRUE; 3424 ap_log_error(APLOG_MARK, APLOG_INFO, 0, s, 3425 "Deprecated cipher name %s, use %s instead.", 3426 cipher, ciphers_def[i].name); 3427 break; 3428 } 3429 } 3430 3431 if (found == PR_FALSE) { 3432 ap_log_error(APLOG_MARK, APLOG_INFO, 0, s, 3433 "Unknown cipher %s\n", cipher); 3434 } 3435 3436 if (ciphers) { 3437 cipher = ciphers; 3438 } 3439 } 3440 3441 return 0; 3442 } 3443 3444 3445 static int 3446 mod_nss_ssl_conf_ciphersuites (server *srv, plugin_config_socket *s, buffer *ciphersuites, const buffer *cipherstring) 3447 { 3448 if (ciphersuites) 3449 /* XXX: not implemented; 3450 * could manually add support for short list of TLSv1.3 suites */ 3451 log_error(srv->errh, __FILE__, __LINE__, 3452 "Ciphersuite support not implemented for %s", 3453 ciphersuites->ptr); 3454 3455 if (buffer_string_is_empty(cipherstring)) 3456 return 1; /* nothing to do */ 3457 3458 /* 3459 * Apache mod_nss 3460 * https://pagure.io/mod_nss.git 3461 * 3462 * modified from mod_nss/nss_engine_init.c:nss_init_ctx_cipher_suite() 3463 */ 3464 3465 PRBool cipher_state[ciphernum]; 3466 3467 /* Disable all NSS supported cipher suites. This is to prevent any new 3468 * NSS cipher suites from getting automatically and unintentionally 3469 * enabled as a result of the NSS_SetDomesticPolicy() call. This way, 3470 * only the ciphers explicitly specified in the server configuration can 3471 * ever be enabled. 3472 */ 3473 for (int i = 0; i < SSL_NumImplementedCiphers; ++i) 3474 SSL_CipherPrefSet(s->model, SSL_ImplementedCiphers[i], SSL_NOT_ALLOWED); 3475 3476 /* initialize all known ciphers to false */ 3477 for (int i = 0; i < ciphernum; ++i) 3478 cipher_state[i] = PR_FALSE; 3479 3480 char *ciphers = strdup(cipherstring->ptr);/*(string modified during parse)*/ 3481 if (NULL == ciphers) return 0; 3482 3483 if (nss_parse_ciphers(srv->errh, ciphers, cipher_state) == -1) 3484 return 0; 3485 3486 free(ciphers); 3487 3488 if (((s->protos.min && s->protos.min <= SSL_LIBRARY_VERSION_3_0) 3489 || s->ssl_use_sslv3) 3490 && countciphers(cipher_state, SSLV3) == 0) { 3491 ap_log_error(APLOG_MARK, APLOG_ERR, 0, srv->errh, 3492 "NSSCipherSuite: SSL3 is enabled but no SSL3 ciphers are enabled."); 3493 return 0; 3494 } 3495 3496 if (s->protos.max >= SSL_LIBRARY_VERSION_TLS_1_0 3497 && countciphers(cipher_state, TLSV1|TLSV1_2|TLSV1_3) == 0) { 3498 ap_log_error(APLOG_MARK, APLOG_ERR, 0, srv->errh, 3499 "NSSCipherSuite: TLS is enabled but no TLS ciphers are enabled."); 3500 return 0; 3501 } 3502 3503 /* Finally actually enable the selected ciphers */ 3504 for (int i = 0; i < ciphernum; ++i) 3505 SSL_CipherPrefSet(s->model, ciphers_def[i].num, 3506 cipher_state[i] == ENABLE_CIPHER 3507 ? SSL_ALLOWED 3508 : SSL_NOT_ALLOWED); 3509 3510 return 1; 3511 } 3512