1 /* $NetBSD: tls2.c,v 1.1.1.1 2010/03/08 02:14:20 lukem Exp $ */ 2 3 /* tls.c - Handle tls/ssl. */ 4 /* OpenLDAP: pkg/ldap/libraries/libldap/tls2.c,v 1.4.2.9 2009/10/30 17:48:16 quanah Exp */ 5 /* This work is part of OpenLDAP Software <http://www.openldap.org/>. 6 * 7 * Copyright 1998-2009 The OpenLDAP Foundation. 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted only as authorized by the OpenLDAP 12 * Public License. 13 * 14 * A copy of this license is available in the file LICENSE in the 15 * top-level directory of the distribution or, alternatively, at 16 * <http://www.OpenLDAP.org/license.html>. 17 */ 18 /* ACKNOWLEDGEMENTS: restructured by Howard Chu. 19 */ 20 21 #include "portable.h" 22 #include "ldap_config.h" 23 24 #include <stdio.h> 25 26 #include <ac/stdlib.h> 27 #include <ac/errno.h> 28 #include <ac/socket.h> 29 #include <ac/string.h> 30 #include <ac/ctype.h> 31 #include <ac/time.h> 32 #include <ac/unistd.h> 33 #include <ac/param.h> 34 #include <ac/dirent.h> 35 36 #include "ldap-int.h" 37 38 #ifdef HAVE_TLS 39 40 #include "ldap-tls.h" 41 42 #ifdef LDAP_R_COMPILE 43 #include <ldap_pvt_thread.h> 44 #endif 45 46 static tls_impl *tls_imp = &ldap_int_tls_impl; 47 #define HAS_TLS( sb ) ber_sockbuf_ctrl( sb, LBER_SB_OPT_HAS_IO, \ 48 (void *)tls_imp->ti_sbio ) 49 50 #endif /* HAVE_TLS */ 51 52 /* RFC2459 minimum required set of supported attribute types 53 * in a certificate DN 54 */ 55 typedef struct oid_name { 56 struct berval oid; 57 struct berval name; 58 } oid_name; 59 60 static oid_name oids[] = { 61 { BER_BVC("2.5.4.3"), BER_BVC("cn") }, 62 { BER_BVC("2.5.4.4"), BER_BVC("sn") }, 63 { BER_BVC("2.5.4.6"), BER_BVC("c") }, 64 { BER_BVC("2.5.4.7"), BER_BVC("l") }, 65 { BER_BVC("2.5.4.8"), BER_BVC("st") }, 66 { BER_BVC("2.5.4.10"), BER_BVC("o") }, 67 { BER_BVC("2.5.4.11"), BER_BVC("ou") }, 68 { BER_BVC("2.5.4.12"), BER_BVC("title") }, 69 { BER_BVC("2.5.4.41"), BER_BVC("name") }, 70 { BER_BVC("2.5.4.42"), BER_BVC("givenName") }, 71 { BER_BVC("2.5.4.43"), BER_BVC("initials") }, 72 { BER_BVC("2.5.4.44"), BER_BVC("generationQualifier") }, 73 { BER_BVC("2.5.4.46"), BER_BVC("dnQualifier") }, 74 { BER_BVC("1.2.840.113549.1.9.1"), BER_BVC("email") }, 75 { BER_BVC("0.9.2342.19200300.100.1.25"), BER_BVC("dc") }, 76 { BER_BVNULL, BER_BVNULL } 77 }; 78 79 #ifdef HAVE_TLS 80 81 void 82 ldap_pvt_tls_ctx_free ( void *c ) 83 { 84 if ( !c ) return; 85 tls_imp->ti_ctx_free( c ); 86 } 87 88 static void 89 tls_ctx_ref( tls_ctx *ctx ) 90 { 91 if ( !ctx ) return; 92 93 tls_imp->ti_ctx_ref( ctx ); 94 } 95 96 #ifdef LDAP_R_COMPILE 97 /* 98 * an extra mutex for the default ctx. 99 */ 100 static ldap_pvt_thread_mutex_t tls_def_ctx_mutex; 101 #endif 102 103 void 104 ldap_int_tls_destroy( struct ldapoptions *lo ) 105 { 106 if ( lo->ldo_tls_ctx ) { 107 ldap_pvt_tls_ctx_free( lo->ldo_tls_ctx ); 108 lo->ldo_tls_ctx = NULL; 109 } 110 111 if ( lo->ldo_tls_certfile ) { 112 LDAP_FREE( lo->ldo_tls_certfile ); 113 lo->ldo_tls_certfile = NULL; 114 } 115 if ( lo->ldo_tls_keyfile ) { 116 LDAP_FREE( lo->ldo_tls_keyfile ); 117 lo->ldo_tls_keyfile = NULL; 118 } 119 if ( lo->ldo_tls_dhfile ) { 120 LDAP_FREE( lo->ldo_tls_dhfile ); 121 lo->ldo_tls_dhfile = NULL; 122 } 123 if ( lo->ldo_tls_cacertfile ) { 124 LDAP_FREE( lo->ldo_tls_cacertfile ); 125 lo->ldo_tls_cacertfile = NULL; 126 } 127 if ( lo->ldo_tls_cacertdir ) { 128 LDAP_FREE( lo->ldo_tls_cacertdir ); 129 lo->ldo_tls_cacertdir = NULL; 130 } 131 if ( lo->ldo_tls_ciphersuite ) { 132 LDAP_FREE( lo->ldo_tls_ciphersuite ); 133 lo->ldo_tls_ciphersuite = NULL; 134 } 135 if ( lo->ldo_tls_crlfile ) { 136 LDAP_FREE( lo->ldo_tls_crlfile ); 137 lo->ldo_tls_crlfile = NULL; 138 } 139 } 140 141 /* 142 * Tear down the TLS subsystem. Should only be called once. 143 */ 144 void 145 ldap_pvt_tls_destroy( void ) 146 { 147 struct ldapoptions *lo = LDAP_INT_GLOBAL_OPT(); 148 149 ldap_int_tls_destroy( lo ); 150 151 tls_imp->ti_tls_destroy(); 152 } 153 154 /* 155 * Initialize a particular TLS implementation. 156 * Called once per implementation. 157 */ 158 static int 159 tls_init(tls_impl *impl ) 160 { 161 static int tls_initialized = 0; 162 163 if ( !tls_initialized++ ) { 164 #ifdef LDAP_R_COMPILE 165 ldap_pvt_thread_mutex_init( &tls_def_ctx_mutex ); 166 #endif 167 } 168 169 if ( impl->ti_inited++ ) return 0; 170 171 #ifdef LDAP_R_COMPILE 172 impl->ti_thr_init(); 173 #endif 174 return impl->ti_tls_init(); 175 } 176 177 /* 178 * Initialize TLS subsystem. Called once per implementation. 179 */ 180 int 181 ldap_pvt_tls_init( void ) 182 { 183 return tls_init( tls_imp ); 184 } 185 186 /* 187 * initialize a new TLS context 188 */ 189 static int 190 ldap_int_tls_init_ctx( struct ldapoptions *lo, int is_server ) 191 { 192 int rc = 0; 193 tls_impl *ti = tls_imp; 194 struct ldaptls lts = lo->ldo_tls_info; 195 196 if ( lo->ldo_tls_ctx ) 197 return 0; 198 199 tls_init( ti ); 200 201 if ( is_server && !lts.lt_certfile && !lts.lt_keyfile && 202 !lts.lt_cacertfile && !lts.lt_cacertdir ) { 203 /* minimum configuration not provided */ 204 return LDAP_NOT_SUPPORTED; 205 } 206 207 #ifdef HAVE_EBCDIC 208 /* This ASCII/EBCDIC handling is a real pain! */ 209 if ( lts.lt_ciphersuite ) { 210 lts.lt_ciphersuite = LDAP_STRDUP( lts.lt_ciphersuite ); 211 __atoe( lts.lt_ciphersuite ); 212 } 213 if ( lts.lt_cacertfile ) { 214 lts.lt_cacertfile = LDAP_STRDUP( lts.lt_cacertfile ); 215 __atoe( lts.lt_cacertfile ); 216 } 217 if ( lts.lt_certfile ) { 218 lts.lt_certfile = LDAP_STRDUP( lts.lt_certfile ); 219 __atoe( lts.lt_certfile ); 220 } 221 if ( lts.lt_keyfile ) { 222 lts.lt_keyfile = LDAP_STRDUP( lts.lt_keyfile ); 223 __atoe( lts.lt_keyfile ); 224 } 225 if ( lts.lt_crlfile ) { 226 lts.lt_crlfile = LDAP_STRDUP( lts.lt_crlfile ); 227 __atoe( lts.lt_crlfile ); 228 } 229 if ( lts.lt_cacertdir ) { 230 lts.lt_cacertdir = LDAP_STRDUP( lts.lt_cacertdir ); 231 __atoe( lts.lt_cacertdir ); 232 } 233 if ( lts.lt_dhfile ) { 234 lts.lt_dhfile = LDAP_STRDUP( lts.lt_dhfile ); 235 __atoe( lts.lt_dhfile ); 236 } 237 #endif 238 lo->ldo_tls_ctx = ti->ti_ctx_new( lo ); 239 if ( lo->ldo_tls_ctx == NULL ) { 240 Debug( LDAP_DEBUG_ANY, 241 "TLS: could not allocate default ctx.\n", 242 0,0,0); 243 rc = -1; 244 goto error_exit; 245 } 246 247 rc = ti->ti_ctx_init( lo, <s, is_server ); 248 249 error_exit: 250 if ( rc < 0 && lo->ldo_tls_ctx != NULL ) { 251 ldap_pvt_tls_ctx_free( lo->ldo_tls_ctx ); 252 lo->ldo_tls_ctx = NULL; 253 } 254 #ifdef HAVE_EBCDIC 255 LDAP_FREE( lts.lt_ciphersuite ); 256 LDAP_FREE( lts.lt_cacertfile ); 257 LDAP_FREE( lts.lt_certfile ); 258 LDAP_FREE( lts.lt_keyfile ); 259 LDAP_FREE( lts.lt_crlfile ); 260 LDAP_FREE( lts.lt_cacertdir ); 261 LDAP_FREE( lts.lt_dhfile ); 262 #endif 263 return rc; 264 } 265 266 /* 267 * initialize the default context 268 */ 269 int 270 ldap_pvt_tls_init_def_ctx( int is_server ) 271 { 272 struct ldapoptions *lo = LDAP_INT_GLOBAL_OPT(); 273 int rc; 274 #ifdef LDAP_R_COMPILE 275 ldap_pvt_thread_mutex_lock( &tls_def_ctx_mutex ); 276 #endif 277 rc = ldap_int_tls_init_ctx( lo, is_server ); 278 #ifdef LDAP_R_COMPILE 279 ldap_pvt_thread_mutex_unlock( &tls_def_ctx_mutex ); 280 #endif 281 return rc; 282 } 283 284 static tls_session * 285 alloc_handle( void *ctx_arg, int is_server ) 286 { 287 tls_ctx *ctx; 288 tls_session *ssl; 289 290 if ( ctx_arg ) { 291 ctx = ctx_arg; 292 } else { 293 struct ldapoptions *lo = LDAP_INT_GLOBAL_OPT(); 294 if ( ldap_pvt_tls_init_def_ctx( is_server ) < 0 ) return NULL; 295 ctx = lo->ldo_tls_ctx; 296 } 297 298 ssl = tls_imp->ti_session_new( ctx, is_server ); 299 if ( ssl == NULL ) { 300 Debug( LDAP_DEBUG_ANY,"TLS: can't create ssl handle.\n",0,0,0); 301 return NULL; 302 } 303 return ssl; 304 } 305 306 static int 307 update_flags( Sockbuf *sb, tls_session * ssl, int rc ) 308 { 309 sb->sb_trans_needs_read = 0; 310 sb->sb_trans_needs_write = 0; 311 312 return tls_imp->ti_session_upflags( sb, ssl, rc ); 313 } 314 315 /* 316 * Call this to do a TLS connect on a sockbuf. ctx_arg can be 317 * a SSL_CTX * or NULL, in which case the default ctx is used. 318 * 319 * Return value: 320 * 321 * 0 - Success. Connection is ready for communication. 322 * <0 - Error. Can't create a TLS stream. 323 * >0 - Partial success. 324 * Do a select (using information from lber_pvt_sb_needs_{read,write} 325 * and call again. 326 */ 327 328 static int 329 ldap_int_tls_connect( LDAP *ld, LDAPConn *conn ) 330 { 331 Sockbuf *sb = conn->lconn_sb; 332 int err; 333 tls_session *ssl = NULL; 334 335 if ( HAS_TLS( sb )) { 336 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl ); 337 } else { 338 struct ldapoptions *lo; 339 tls_ctx *ctx; 340 341 ctx = ld->ld_options.ldo_tls_ctx; 342 343 ssl = alloc_handle( ctx, 0 ); 344 345 if ( ssl == NULL ) return -1; 346 347 #ifdef LDAP_DEBUG 348 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug, 349 LBER_SBIOD_LEVEL_TRANSPORT, (void *)"tls_" ); 350 #endif 351 ber_sockbuf_add_io( sb, tls_imp->ti_sbio, 352 LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl ); 353 354 lo = LDAP_INT_GLOBAL_OPT(); 355 if( ctx == NULL ) { 356 ctx = lo->ldo_tls_ctx; 357 ld->ld_options.ldo_tls_ctx = ctx; 358 tls_ctx_ref( ctx ); 359 } 360 if ( ld->ld_options.ldo_tls_connect_cb ) 361 ld->ld_options.ldo_tls_connect_cb( ld, ssl, ctx, 362 ld->ld_options.ldo_tls_connect_arg ); 363 if ( lo && lo->ldo_tls_connect_cb && lo->ldo_tls_connect_cb != 364 ld->ld_options.ldo_tls_connect_cb ) 365 lo->ldo_tls_connect_cb( ld, ssl, ctx, lo->ldo_tls_connect_arg ); 366 } 367 368 err = tls_imp->ti_session_connect( ld, ssl ); 369 370 #ifdef HAVE_WINSOCK 371 errno = WSAGetLastError(); 372 #endif 373 374 if ( err < 0 ) 375 { 376 char buf[256], *msg; 377 if ( update_flags( sb, ssl, err )) { 378 return 1; 379 } 380 381 msg = tls_imp->ti_session_errmsg( ssl, err, buf, sizeof(buf) ); 382 if ( msg ) { 383 if ( ld->ld_error ) { 384 LDAP_FREE( ld->ld_error ); 385 } 386 ld->ld_error = LDAP_STRDUP( msg ); 387 #ifdef HAVE_EBCDIC 388 if ( ld->ld_error ) __etoa(ld->ld_error); 389 #endif 390 } 391 392 Debug( LDAP_DEBUG_ANY,"TLS: can't connect: %s.\n", 393 ld->ld_error ? ld->ld_error : "" ,0,0); 394 395 ber_sockbuf_remove_io( sb, tls_imp->ti_sbio, 396 LBER_SBIOD_LEVEL_TRANSPORT ); 397 #ifdef LDAP_DEBUG 398 ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug, 399 LBER_SBIOD_LEVEL_TRANSPORT ); 400 #endif 401 return -1; 402 } 403 404 return 0; 405 } 406 407 /* 408 * Call this to do a TLS accept on a sockbuf. 409 * Everything else is the same as with tls_connect. 410 */ 411 int 412 ldap_pvt_tls_accept( Sockbuf *sb, void *ctx_arg ) 413 { 414 int err; 415 tls_session *ssl = NULL; 416 417 if ( HAS_TLS( sb )) { 418 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl ); 419 } else { 420 ssl = alloc_handle( ctx_arg, 1 ); 421 if ( ssl == NULL ) return -1; 422 423 #ifdef LDAP_DEBUG 424 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug, 425 LBER_SBIOD_LEVEL_TRANSPORT, (void *)"tls_" ); 426 #endif 427 ber_sockbuf_add_io( sb, tls_imp->ti_sbio, 428 LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl ); 429 } 430 431 err = tls_imp->ti_session_accept( ssl ); 432 433 #ifdef HAVE_WINSOCK 434 errno = WSAGetLastError(); 435 #endif 436 437 if ( err < 0 ) 438 { 439 if ( update_flags( sb, ssl, err )) return 1; 440 441 if ( DebugTest( LDAP_DEBUG_ANY ) ) { 442 char buf[256], *msg; 443 msg = tls_imp->ti_session_errmsg( ssl, err, buf, sizeof(buf) ); 444 Debug( LDAP_DEBUG_ANY,"TLS: can't accept: %s.\n", 445 msg ? msg : "(unknown)", 0, 0 ); 446 } 447 448 ber_sockbuf_remove_io( sb, tls_imp->ti_sbio, 449 LBER_SBIOD_LEVEL_TRANSPORT ); 450 #ifdef LDAP_DEBUG 451 ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug, 452 LBER_SBIOD_LEVEL_TRANSPORT ); 453 #endif 454 return -1; 455 } 456 return 0; 457 } 458 459 int 460 ldap_pvt_tls_inplace ( Sockbuf *sb ) 461 { 462 return HAS_TLS( sb ) ? 1 : 0; 463 } 464 465 int 466 ldap_tls_inplace( LDAP *ld ) 467 { 468 Sockbuf *sb = NULL; 469 470 if ( ld->ld_defconn && ld->ld_defconn->lconn_sb ) { 471 sb = ld->ld_defconn->lconn_sb; 472 473 } else if ( ld->ld_sb ) { 474 sb = ld->ld_sb; 475 476 } else { 477 return 0; 478 } 479 480 return ldap_pvt_tls_inplace( sb ); 481 } 482 483 int 484 ldap_pvt_tls_get_peer_dn( void *s, struct berval *dn, 485 LDAPDN_rewrite_dummy *func, unsigned flags ) 486 { 487 tls_session *session = s; 488 struct berval bvdn; 489 int rc; 490 491 rc = tls_imp->ti_session_peer_dn( session, &bvdn ); 492 if ( rc ) return rc; 493 494 rc = ldap_X509dn2bv( &bvdn, dn, 495 (LDAPDN_rewrite_func *)func, flags); 496 return rc; 497 } 498 499 int 500 ldap_pvt_tls_check_hostname( LDAP *ld, void *s, const char *name_in ) 501 { 502 tls_session *session = s; 503 504 return tls_imp->ti_session_chkhost( ld, session, name_in ); 505 } 506 507 int 508 ldap_int_tls_config( LDAP *ld, int option, const char *arg ) 509 { 510 int i; 511 512 switch( option ) { 513 case LDAP_OPT_X_TLS_CACERTFILE: 514 case LDAP_OPT_X_TLS_CACERTDIR: 515 case LDAP_OPT_X_TLS_CERTFILE: 516 case LDAP_OPT_X_TLS_KEYFILE: 517 case LDAP_OPT_X_TLS_RANDOM_FILE: 518 case LDAP_OPT_X_TLS_CIPHER_SUITE: 519 case LDAP_OPT_X_TLS_DHFILE: 520 case LDAP_OPT_X_TLS_CRLFILE: /* GnuTLS only */ 521 return ldap_pvt_tls_set_option( ld, option, (void *) arg ); 522 523 case LDAP_OPT_X_TLS_REQUIRE_CERT: 524 case LDAP_OPT_X_TLS: 525 i = -1; 526 if ( strcasecmp( arg, "never" ) == 0 ) { 527 i = LDAP_OPT_X_TLS_NEVER ; 528 529 } else if ( strcasecmp( arg, "demand" ) == 0 ) { 530 i = LDAP_OPT_X_TLS_DEMAND ; 531 532 } else if ( strcasecmp( arg, "allow" ) == 0 ) { 533 i = LDAP_OPT_X_TLS_ALLOW ; 534 535 } else if ( strcasecmp( arg, "try" ) == 0 ) { 536 i = LDAP_OPT_X_TLS_TRY ; 537 538 } else if ( ( strcasecmp( arg, "hard" ) == 0 ) || 539 ( strcasecmp( arg, "on" ) == 0 ) || 540 ( strcasecmp( arg, "yes" ) == 0) || 541 ( strcasecmp( arg, "true" ) == 0 ) ) 542 { 543 i = LDAP_OPT_X_TLS_HARD ; 544 } 545 546 if (i >= 0) { 547 return ldap_pvt_tls_set_option( ld, option, &i ); 548 } 549 return -1; 550 case LDAP_OPT_X_TLS_PROTOCOL_MIN: { 551 char *next; 552 long l; 553 l = strtol( arg, &next, 10 ); 554 if ( l < 0 || l > 0xff || next == arg || 555 ( *next != '\0' && *next != '.' ) ) 556 return -1; 557 i = l << 8; 558 if (*next == '.') { 559 arg = next + 1; 560 l = strtol( arg, &next, 10 ); 561 if ( l < 0 || l > 0xff || next == arg || *next != '\0' ) 562 return -1; 563 i += l; 564 } 565 return ldap_pvt_tls_set_option( ld, option, &i ); 566 } 567 #ifdef HAVE_OPENSSL_CRL 568 case LDAP_OPT_X_TLS_CRLCHECK: /* OpenSSL only */ 569 i = -1; 570 if ( strcasecmp( arg, "none" ) == 0 ) { 571 i = LDAP_OPT_X_TLS_CRL_NONE ; 572 } else if ( strcasecmp( arg, "peer" ) == 0 ) { 573 i = LDAP_OPT_X_TLS_CRL_PEER ; 574 } else if ( strcasecmp( arg, "all" ) == 0 ) { 575 i = LDAP_OPT_X_TLS_CRL_ALL ; 576 } 577 if (i >= 0) { 578 return ldap_pvt_tls_set_option( ld, option, &i ); 579 } 580 return -1; 581 #endif 582 } 583 return -1; 584 } 585 586 int 587 ldap_pvt_tls_get_option( LDAP *ld, int option, void *arg ) 588 { 589 struct ldapoptions *lo; 590 591 if( ld != NULL ) { 592 assert( LDAP_VALID( ld ) ); 593 594 if( !LDAP_VALID( ld ) ) { 595 return LDAP_OPT_ERROR; 596 } 597 598 lo = &ld->ld_options; 599 600 } else { 601 /* Get pointer to global option structure */ 602 lo = LDAP_INT_GLOBAL_OPT(); 603 if ( lo == NULL ) { 604 return LDAP_NO_MEMORY; 605 } 606 } 607 608 switch( option ) { 609 case LDAP_OPT_X_TLS: 610 *(int *)arg = lo->ldo_tls_mode; 611 break; 612 case LDAP_OPT_X_TLS_CTX: 613 *(void **)arg = lo->ldo_tls_ctx; 614 if ( lo->ldo_tls_ctx ) { 615 tls_ctx_ref( lo->ldo_tls_ctx ); 616 } 617 break; 618 case LDAP_OPT_X_TLS_CACERTFILE: 619 *(char **)arg = lo->ldo_tls_cacertfile ? 620 LDAP_STRDUP( lo->ldo_tls_cacertfile ) : NULL; 621 break; 622 case LDAP_OPT_X_TLS_CACERTDIR: 623 *(char **)arg = lo->ldo_tls_cacertdir ? 624 LDAP_STRDUP( lo->ldo_tls_cacertdir ) : NULL; 625 break; 626 case LDAP_OPT_X_TLS_CERTFILE: 627 *(char **)arg = lo->ldo_tls_certfile ? 628 LDAP_STRDUP( lo->ldo_tls_certfile ) : NULL; 629 break; 630 case LDAP_OPT_X_TLS_KEYFILE: 631 *(char **)arg = lo->ldo_tls_keyfile ? 632 LDAP_STRDUP( lo->ldo_tls_keyfile ) : NULL; 633 break; 634 case LDAP_OPT_X_TLS_DHFILE: 635 *(char **)arg = lo->ldo_tls_dhfile ? 636 LDAP_STRDUP( lo->ldo_tls_dhfile ) : NULL; 637 break; 638 case LDAP_OPT_X_TLS_CRLFILE: /* GnuTLS only */ 639 *(char **)arg = lo->ldo_tls_crlfile ? 640 LDAP_STRDUP( lo->ldo_tls_crlfile ) : NULL; 641 break; 642 case LDAP_OPT_X_TLS_REQUIRE_CERT: 643 *(int *)arg = lo->ldo_tls_require_cert; 644 break; 645 #ifdef HAVE_OPENSSL_CRL 646 case LDAP_OPT_X_TLS_CRLCHECK: /* OpenSSL only */ 647 *(int *)arg = lo->ldo_tls_crlcheck; 648 break; 649 #endif 650 case LDAP_OPT_X_TLS_CIPHER_SUITE: 651 *(char **)arg = lo->ldo_tls_ciphersuite ? 652 LDAP_STRDUP( lo->ldo_tls_ciphersuite ) : NULL; 653 break; 654 case LDAP_OPT_X_TLS_PROTOCOL_MIN: 655 *(int *)arg = lo->ldo_tls_protocol_min; 656 break; 657 case LDAP_OPT_X_TLS_RANDOM_FILE: 658 *(char **)arg = lo->ldo_tls_randfile ? 659 LDAP_STRDUP( lo->ldo_tls_randfile ) : NULL; 660 break; 661 case LDAP_OPT_X_TLS_SSL_CTX: { 662 void *retval = 0; 663 if ( ld != NULL ) { 664 LDAPConn *conn = ld->ld_defconn; 665 if ( conn != NULL ) { 666 Sockbuf *sb = conn->lconn_sb; 667 retval = ldap_pvt_tls_sb_ctx( sb ); 668 } 669 } 670 *(void **)arg = retval; 671 break; 672 } 673 case LDAP_OPT_X_TLS_CONNECT_CB: 674 *(LDAP_TLS_CONNECT_CB **)arg = lo->ldo_tls_connect_cb; 675 break; 676 case LDAP_OPT_X_TLS_CONNECT_ARG: 677 *(void **)arg = lo->ldo_tls_connect_arg; 678 break; 679 default: 680 return -1; 681 } 682 return 0; 683 } 684 685 int 686 ldap_pvt_tls_set_option( LDAP *ld, int option, void *arg ) 687 { 688 struct ldapoptions *lo; 689 690 if( ld != NULL ) { 691 assert( LDAP_VALID( ld ) ); 692 693 if( !LDAP_VALID( ld ) ) { 694 return LDAP_OPT_ERROR; 695 } 696 697 lo = &ld->ld_options; 698 699 } else { 700 /* Get pointer to global option structure */ 701 lo = LDAP_INT_GLOBAL_OPT(); 702 if ( lo == NULL ) { 703 return LDAP_NO_MEMORY; 704 } 705 } 706 707 switch( option ) { 708 case LDAP_OPT_X_TLS: 709 if ( !arg ) return -1; 710 711 switch( *(int *) arg ) { 712 case LDAP_OPT_X_TLS_NEVER: 713 case LDAP_OPT_X_TLS_DEMAND: 714 case LDAP_OPT_X_TLS_ALLOW: 715 case LDAP_OPT_X_TLS_TRY: 716 case LDAP_OPT_X_TLS_HARD: 717 if (lo != NULL) { 718 lo->ldo_tls_mode = *(int *)arg; 719 } 720 721 return 0; 722 } 723 return -1; 724 725 case LDAP_OPT_X_TLS_CTX: 726 if ( lo->ldo_tls_ctx ) 727 ldap_pvt_tls_ctx_free( lo->ldo_tls_ctx ); 728 lo->ldo_tls_ctx = arg; 729 tls_ctx_ref( lo->ldo_tls_ctx ); 730 return 0; 731 case LDAP_OPT_X_TLS_CONNECT_CB: 732 lo->ldo_tls_connect_cb = (LDAP_TLS_CONNECT_CB *)arg; 733 return 0; 734 case LDAP_OPT_X_TLS_CONNECT_ARG: 735 lo->ldo_tls_connect_arg = arg; 736 return 0; 737 case LDAP_OPT_X_TLS_CACERTFILE: 738 if ( lo->ldo_tls_cacertfile ) LDAP_FREE( lo->ldo_tls_cacertfile ); 739 lo->ldo_tls_cacertfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL; 740 return 0; 741 case LDAP_OPT_X_TLS_CACERTDIR: 742 if ( lo->ldo_tls_cacertdir ) LDAP_FREE( lo->ldo_tls_cacertdir ); 743 lo->ldo_tls_cacertdir = arg ? LDAP_STRDUP( (char *) arg ) : NULL; 744 return 0; 745 case LDAP_OPT_X_TLS_CERTFILE: 746 if ( lo->ldo_tls_certfile ) LDAP_FREE( lo->ldo_tls_certfile ); 747 lo->ldo_tls_certfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL; 748 return 0; 749 case LDAP_OPT_X_TLS_KEYFILE: 750 if ( lo->ldo_tls_keyfile ) LDAP_FREE( lo->ldo_tls_keyfile ); 751 lo->ldo_tls_keyfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL; 752 return 0; 753 case LDAP_OPT_X_TLS_DHFILE: 754 if ( lo->ldo_tls_dhfile ) LDAP_FREE( lo->ldo_tls_dhfile ); 755 lo->ldo_tls_dhfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL; 756 return 0; 757 case LDAP_OPT_X_TLS_CRLFILE: /* GnuTLS only */ 758 if ( lo->ldo_tls_crlfile ) LDAP_FREE( lo->ldo_tls_crlfile ); 759 lo->ldo_tls_crlfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL; 760 return 0; 761 case LDAP_OPT_X_TLS_REQUIRE_CERT: 762 if ( !arg ) return -1; 763 switch( *(int *) arg ) { 764 case LDAP_OPT_X_TLS_NEVER: 765 case LDAP_OPT_X_TLS_DEMAND: 766 case LDAP_OPT_X_TLS_ALLOW: 767 case LDAP_OPT_X_TLS_TRY: 768 case LDAP_OPT_X_TLS_HARD: 769 lo->ldo_tls_require_cert = * (int *) arg; 770 return 0; 771 } 772 return -1; 773 #ifdef HAVE_OPENSSL_CRL 774 case LDAP_OPT_X_TLS_CRLCHECK: /* OpenSSL only */ 775 if ( !arg ) return -1; 776 switch( *(int *) arg ) { 777 case LDAP_OPT_X_TLS_CRL_NONE: 778 case LDAP_OPT_X_TLS_CRL_PEER: 779 case LDAP_OPT_X_TLS_CRL_ALL: 780 lo->ldo_tls_crlcheck = * (int *) arg; 781 return 0; 782 } 783 return -1; 784 #endif 785 case LDAP_OPT_X_TLS_CIPHER_SUITE: 786 if ( lo->ldo_tls_ciphersuite ) LDAP_FREE( lo->ldo_tls_ciphersuite ); 787 lo->ldo_tls_ciphersuite = arg ? LDAP_STRDUP( (char *) arg ) : NULL; 788 return 0; 789 790 case LDAP_OPT_X_TLS_PROTOCOL_MIN: 791 if ( !arg ) return -1; 792 lo->ldo_tls_protocol_min = *(int *)arg; 793 return 0; 794 case LDAP_OPT_X_TLS_RANDOM_FILE: 795 if ( ld != NULL ) 796 return -1; 797 if ( lo->ldo_tls_randfile ) LDAP_FREE (lo->ldo_tls_randfile ); 798 lo->ldo_tls_randfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL; 799 break; 800 case LDAP_OPT_X_TLS_NEWCTX: 801 if ( !arg ) return -1; 802 if ( lo->ldo_tls_ctx ) 803 ldap_pvt_tls_ctx_free( lo->ldo_tls_ctx ); 804 lo->ldo_tls_ctx = NULL; 805 return ldap_int_tls_init_ctx( lo, *(int *)arg ); 806 default: 807 return -1; 808 } 809 return 0; 810 } 811 812 int 813 ldap_int_tls_start ( LDAP *ld, LDAPConn *conn, LDAPURLDesc *srv ) 814 { 815 Sockbuf *sb = conn->lconn_sb; 816 char *host; 817 void *ssl; 818 819 if( srv ) { 820 host = srv->lud_host; 821 } else { 822 host = conn->lconn_server->lud_host; 823 } 824 825 /* avoid NULL host */ 826 if( host == NULL ) { 827 host = "localhost"; 828 } 829 830 (void) tls_init( tls_imp ); 831 832 /* 833 * Fortunately, the lib uses blocking io... 834 */ 835 if ( ldap_int_tls_connect( ld, conn ) < 0 ) { 836 ld->ld_errno = LDAP_CONNECT_ERROR; 837 return (ld->ld_errno); 838 } 839 840 ssl = ldap_pvt_tls_sb_ctx( sb ); 841 assert( ssl != NULL ); 842 843 /* 844 * compare host with name(s) in certificate 845 */ 846 if (ld->ld_options.ldo_tls_require_cert != LDAP_OPT_X_TLS_NEVER) { 847 ld->ld_errno = ldap_pvt_tls_check_hostname( ld, ssl, host ); 848 if (ld->ld_errno != LDAP_SUCCESS) { 849 return ld->ld_errno; 850 } 851 } 852 853 return LDAP_SUCCESS; 854 } 855 856 void * 857 ldap_pvt_tls_sb_ctx( Sockbuf *sb ) 858 { 859 void *p = NULL; 860 861 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&p ); 862 return p; 863 } 864 865 int 866 ldap_pvt_tls_get_strength( void *s ) 867 { 868 tls_session *session = s; 869 870 return tls_imp->ti_session_strength( session ); 871 } 872 873 int 874 ldap_pvt_tls_get_my_dn( void *s, struct berval *dn, LDAPDN_rewrite_dummy *func, unsigned flags ) 875 { 876 tls_session *session = s; 877 struct berval der_dn; 878 int rc; 879 880 rc = tls_imp->ti_session_my_dn( session, &der_dn ); 881 if ( rc == LDAP_SUCCESS ) 882 rc = ldap_X509dn2bv(&der_dn, dn, (LDAPDN_rewrite_func *)func, flags ); 883 return rc; 884 } 885 #endif /* HAVE_TLS */ 886 887 int 888 ldap_start_tls( LDAP *ld, 889 LDAPControl **serverctrls, 890 LDAPControl **clientctrls, 891 int *msgidp ) 892 { 893 return ldap_extended_operation( ld, LDAP_EXOP_START_TLS, 894 NULL, serverctrls, clientctrls, msgidp ); 895 } 896 897 int 898 ldap_install_tls( LDAP *ld ) 899 { 900 #ifndef HAVE_TLS 901 return LDAP_NOT_SUPPORTED; 902 #else 903 if ( ldap_tls_inplace( ld ) ) { 904 return LDAP_LOCAL_ERROR; 905 } 906 907 return ldap_int_tls_start( ld, ld->ld_defconn, NULL ); 908 #endif 909 } 910 911 int 912 ldap_start_tls_s ( LDAP *ld, 913 LDAPControl **serverctrls, 914 LDAPControl **clientctrls ) 915 { 916 #ifndef HAVE_TLS 917 return LDAP_NOT_SUPPORTED; 918 #else 919 int rc; 920 char *rspoid = NULL; 921 struct berval *rspdata = NULL; 922 923 /* XXYYZ: this initiates operation only on default connection! */ 924 925 if ( ldap_tls_inplace( ld ) ) { 926 return LDAP_LOCAL_ERROR; 927 } 928 929 rc = ldap_extended_operation_s( ld, LDAP_EXOP_START_TLS, 930 NULL, serverctrls, clientctrls, &rspoid, &rspdata ); 931 932 if ( rspoid != NULL ) { 933 LDAP_FREE(rspoid); 934 } 935 936 if ( rspdata != NULL ) { 937 ber_bvfree( rspdata ); 938 } 939 940 if ( rc == LDAP_SUCCESS ) { 941 rc = ldap_int_tls_start( ld, ld->ld_defconn, NULL ); 942 } 943 944 return rc; 945 #endif 946 } 947 948 /* These tags probably all belong in lber.h, but they're 949 * not normally encountered when processing LDAP, so maybe 950 * they belong somewhere else instead. 951 */ 952 953 #define LBER_TAG_OID ((ber_tag_t) 0x06UL) 954 955 /* Tags for string types used in a DirectoryString. 956 * 957 * Note that IA5string is not one of the defined choices for 958 * DirectoryString in X.520, but it gets used for email AVAs. 959 */ 960 #define LBER_TAG_UTF8 ((ber_tag_t) 0x0cUL) 961 #define LBER_TAG_PRINTABLE ((ber_tag_t) 0x13UL) 962 #define LBER_TAG_TELETEX ((ber_tag_t) 0x14UL) 963 #define LBER_TAG_IA5 ((ber_tag_t) 0x16UL) 964 #define LBER_TAG_UNIVERSAL ((ber_tag_t) 0x1cUL) 965 #define LBER_TAG_BMP ((ber_tag_t) 0x1eUL) 966 967 static oid_name * 968 find_oid( struct berval *oid ) 969 { 970 int i; 971 972 for ( i=0; !BER_BVISNULL( &oids[i].oid ); i++ ) { 973 if ( oids[i].oid.bv_len != oid->bv_len ) continue; 974 if ( !strcmp( oids[i].oid.bv_val, oid->bv_val )) 975 return &oids[i]; 976 } 977 return NULL; 978 } 979 980 /* Convert a structured DN from an X.509 certificate into an LDAPV3 DN. 981 * x509_name must be raw DER. If func is non-NULL, the 982 * constructed DN will use numeric OIDs to identify attributeTypes, 983 * and the func() will be invoked to rewrite the DN with the given 984 * flags. 985 * 986 * Otherwise the DN will use shortNames from a hardcoded table. 987 */ 988 int 989 ldap_X509dn2bv( void *x509_name, struct berval *bv, LDAPDN_rewrite_func *func, 990 unsigned flags ) 991 { 992 LDAPDN newDN; 993 LDAPRDN newRDN; 994 LDAPAVA *newAVA, *baseAVA; 995 BerElementBuffer berbuf; 996 BerElement *ber = (BerElement *)&berbuf; 997 char oids[8192], *oidptr = oids, *oidbuf = NULL; 998 void *ptrs[2048]; 999 char *dn_end, *rdn_end; 1000 int i, navas, nrdns, rc = LDAP_SUCCESS; 1001 size_t dnsize, oidrem = sizeof(oids), oidsize = 0; 1002 int csize; 1003 ber_tag_t tag; 1004 ber_len_t len; 1005 oid_name *oidname; 1006 1007 struct berval Oid, Val, oid2, *in = x509_name; 1008 1009 assert( bv != NULL ); 1010 1011 bv->bv_len = 0; 1012 bv->bv_val = NULL; 1013 1014 navas = 0; 1015 nrdns = 0; 1016 1017 /* A DN is a SEQUENCE of RDNs. An RDN is a SET of AVAs. 1018 * An AVA is a SEQUENCE of attr and value. 1019 * Count the number of AVAs and RDNs 1020 */ 1021 ber_init2( ber, in, LBER_USE_DER ); 1022 tag = ber_peek_tag( ber, &len ); 1023 if ( tag != LBER_SEQUENCE ) 1024 return LDAP_DECODING_ERROR; 1025 1026 for ( tag = ber_first_element( ber, &len, &dn_end ); 1027 tag == LBER_SET; 1028 tag = ber_next_element( ber, &len, dn_end )) { 1029 nrdns++; 1030 for ( tag = ber_first_element( ber, &len, &rdn_end ); 1031 tag == LBER_SEQUENCE; 1032 tag = ber_next_element( ber, &len, rdn_end )) { 1033 tag = ber_skip_tag( ber, &len ); 1034 ber_skip_data( ber, len ); 1035 navas++; 1036 } 1037 } 1038 1039 /* Allocate the DN/RDN/AVA stuff as a single block */ 1040 dnsize = sizeof(LDAPRDN) * (nrdns+1); 1041 dnsize += sizeof(LDAPAVA *) * (navas+nrdns); 1042 dnsize += sizeof(LDAPAVA) * navas; 1043 if (dnsize > sizeof(ptrs)) { 1044 newDN = (LDAPDN)LDAP_MALLOC( dnsize ); 1045 if ( newDN == NULL ) 1046 return LDAP_NO_MEMORY; 1047 } else { 1048 newDN = (LDAPDN)(char *)ptrs; 1049 } 1050 1051 newDN[nrdns] = NULL; 1052 newRDN = (LDAPRDN)(newDN + nrdns+1); 1053 newAVA = (LDAPAVA *)(newRDN + navas + nrdns); 1054 baseAVA = newAVA; 1055 1056 /* Rewind and start extracting */ 1057 ber_rewind( ber ); 1058 1059 tag = ber_first_element( ber, &len, &dn_end ); 1060 for ( i = nrdns - 1; i >= 0; i-- ) { 1061 newDN[i] = newRDN; 1062 1063 for ( tag = ber_first_element( ber, &len, &rdn_end ); 1064 tag == LBER_SEQUENCE; 1065 tag = ber_next_element( ber, &len, rdn_end )) { 1066 1067 *newRDN++ = newAVA; 1068 tag = ber_skip_tag( ber, &len ); 1069 tag = ber_get_stringbv( ber, &Oid, LBER_BV_NOTERM ); 1070 if ( tag != LBER_TAG_OID ) { 1071 rc = LDAP_DECODING_ERROR; 1072 goto nomem; 1073 } 1074 1075 oid2.bv_val = oidptr; 1076 oid2.bv_len = oidrem; 1077 if ( ber_decode_oid( &Oid, &oid2 ) < 0 ) { 1078 rc = LDAP_DECODING_ERROR; 1079 goto nomem; 1080 } 1081 oidname = find_oid( &oid2 ); 1082 if ( !oidname ) { 1083 newAVA->la_attr = oid2; 1084 oidptr += oid2.bv_len + 1; 1085 oidrem -= oid2.bv_len + 1; 1086 1087 /* Running out of OID buffer space? */ 1088 if (oidrem < 128) { 1089 if ( oidsize == 0 ) { 1090 oidsize = sizeof(oids) * 2; 1091 oidrem = oidsize; 1092 oidbuf = LDAP_MALLOC( oidsize ); 1093 if ( oidbuf == NULL ) goto nomem; 1094 oidptr = oidbuf; 1095 } else { 1096 char *old = oidbuf; 1097 oidbuf = LDAP_REALLOC( oidbuf, oidsize*2 ); 1098 if ( oidbuf == NULL ) goto nomem; 1099 /* Buffer moved! Fix AVA pointers */ 1100 if ( old != oidbuf ) { 1101 LDAPAVA *a; 1102 long dif = oidbuf - old; 1103 1104 for (a=baseAVA; a<=newAVA; a++){ 1105 if (a->la_attr.bv_val >= old && 1106 a->la_attr.bv_val <= (old + oidsize)) 1107 a->la_attr.bv_val += dif; 1108 } 1109 } 1110 oidptr = oidbuf + oidsize - oidrem; 1111 oidrem += oidsize; 1112 oidsize *= 2; 1113 } 1114 } 1115 } else { 1116 if ( func ) { 1117 newAVA->la_attr = oidname->oid; 1118 } else { 1119 newAVA->la_attr = oidname->name; 1120 } 1121 } 1122 tag = ber_get_stringbv( ber, &Val, LBER_BV_NOTERM ); 1123 switch(tag) { 1124 case LBER_TAG_UNIVERSAL: 1125 /* This uses 32-bit ISO 10646-1 */ 1126 csize = 4; goto to_utf8; 1127 case LBER_TAG_BMP: 1128 /* This uses 16-bit ISO 10646-1 */ 1129 csize = 2; goto to_utf8; 1130 case LBER_TAG_TELETEX: 1131 /* This uses 8-bit, assume ISO 8859-1 */ 1132 csize = 1; 1133 to_utf8: rc = ldap_ucs_to_utf8s( &Val, csize, &newAVA->la_value ); 1134 newAVA->la_flags |= LDAP_AVA_FREE_VALUE; 1135 if (rc != LDAP_SUCCESS) goto nomem; 1136 newAVA->la_flags = LDAP_AVA_NONPRINTABLE; 1137 break; 1138 case LBER_TAG_UTF8: 1139 newAVA->la_flags = LDAP_AVA_NONPRINTABLE; 1140 /* This is already in UTF-8 encoding */ 1141 case LBER_TAG_IA5: 1142 case LBER_TAG_PRINTABLE: 1143 /* These are always 7-bit strings */ 1144 newAVA->la_value = Val; 1145 default: 1146 ; 1147 } 1148 newAVA->la_private = NULL; 1149 newAVA->la_flags = LDAP_AVA_STRING; 1150 newAVA++; 1151 } 1152 *newRDN++ = NULL; 1153 tag = ber_next_element( ber, &len, dn_end ); 1154 } 1155 1156 if ( func ) { 1157 rc = func( newDN, flags, NULL ); 1158 if ( rc != LDAP_SUCCESS ) 1159 goto nomem; 1160 } 1161 1162 rc = ldap_dn2bv_x( newDN, bv, LDAP_DN_FORMAT_LDAPV3, NULL ); 1163 1164 nomem: 1165 for (;baseAVA < newAVA; baseAVA++) { 1166 if (baseAVA->la_flags & LDAP_AVA_FREE_ATTR) 1167 LDAP_FREE( baseAVA->la_attr.bv_val ); 1168 if (baseAVA->la_flags & LDAP_AVA_FREE_VALUE) 1169 LDAP_FREE( baseAVA->la_value.bv_val ); 1170 } 1171 1172 if ( oidsize != 0 ) 1173 LDAP_FREE( oidbuf ); 1174 if ( newDN != (LDAPDN)(char *) ptrs ) 1175 LDAP_FREE( newDN ); 1176 return rc; 1177 } 1178 1179