git.sur5r.net Git - openldap/blob - libraries/libldap/init.c

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1998-2008 The OpenLDAP Foundation.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted only as authorized by the OpenLDAP
   9  * Public License.
  10  *
  11  * A copy of this license is available in the file LICENSE in the
  12  * top-level directory of the distribution or, alternatively, at
  13  * <http://www.OpenLDAP.org/license.html>.
  14  */
  15
  16 #include "portable.h"
  17
  18 #include <stdio.h>
  19 #include <ac/stdlib.h>
  20
  21 #include <ac/socket.h>
  22 #include <ac/string.h>
  23 #include <ac/ctype.h>
  24 #include <ac/time.h>
  25
  26 #ifdef HAVE_LIMITS_H
  27 #include <limits.h>
  28 #endif
  29
  30 #include "ldap-int.h"
  31 #include "ldap_defaults.h"
  32
  33 struct ldapoptions ldap_int_global_options =
  34         { LDAP_UNINITIALIZED, LDAP_DEBUG_NONE };
  35
  36 #define ATTR_NONE       0
  37 #define ATTR_BOOL       1
  38 #define ATTR_INT        2
  39 #define ATTR_KV         3
  40 #define ATTR_STRING     4
  41 #define ATTR_OPTION     5
  42
  43 #define ATTR_SASL       6
  44 #define ATTR_TLS        7
  45
  46 struct ol_keyvalue {
  47         const char *            key;
  48         int                     value;
  49 };
  50
  51 static const struct ol_keyvalue deref_kv[] = {
  52         {"never", LDAP_DEREF_NEVER},
  53         {"searching", LDAP_DEREF_SEARCHING},
  54         {"finding", LDAP_DEREF_FINDING},
  55         {"always", LDAP_DEREF_ALWAYS},
  56         {NULL, 0}
  57 };
  58
  59 static const struct ol_attribute {
  60         int                     useronly;
  61         int                     type;
  62         const char *    name;
  63         const void *    data;
  64         size_t          offset;
  65 } attrs[] = {
  66         {0, ATTR_KV,            "DEREF",        deref_kv, /* or &deref_kv[0] */
  67                 offsetof(struct ldapoptions, ldo_deref)},
  68         {0, ATTR_INT,           "SIZELIMIT",    NULL,
  69                 offsetof(struct ldapoptions, ldo_sizelimit)},
  70         {0, ATTR_INT,           "TIMELIMIT",    NULL,
  71                 offsetof(struct ldapoptions, ldo_timelimit)},
  72         {1, ATTR_STRING,        "BINDDN",               NULL,
  73                 offsetof(struct ldapoptions, ldo_defbinddn)},
  74         {0, ATTR_STRING,        "BASE",                 NULL,
  75                 offsetof(struct ldapoptions, ldo_defbase)},
  76         {0, ATTR_INT,           "PORT",                 NULL,           /* deprecated */
  77                 offsetof(struct ldapoptions, ldo_defport)},
  78         {0, ATTR_OPTION,        "HOST",                 NULL,   LDAP_OPT_HOST_NAME}, /* deprecated */
  79         {0, ATTR_OPTION,        "URI",                  NULL,   LDAP_OPT_URI}, /* replaces HOST/PORT */
  80         {0, ATTR_BOOL,          "REFERRALS",    NULL,   LDAP_BOOL_REFERRALS},
  81         {0, ATTR_BOOL,          "RESTART",              NULL,   LDAP_BOOL_RESTART},
  82
  83 #ifdef HAVE_CYRUS_SASL
  84         {1, ATTR_STRING,        "SASL_MECH",            NULL,
  85                 offsetof(struct ldapoptions, ldo_def_sasl_mech)},
  86         {1, ATTR_STRING,        "SASL_REALM",           NULL,
  87                 offsetof(struct ldapoptions, ldo_def_sasl_realm)},
  88         {1, ATTR_STRING,        "SASL_AUTHCID",         NULL,
  89                 offsetof(struct ldapoptions, ldo_def_sasl_authcid)},
  90         {1, ATTR_STRING,        "SASL_AUTHZID",         NULL,
  91                 offsetof(struct ldapoptions, ldo_def_sasl_authzid)},
  92         {0, ATTR_SASL,          "SASL_SECPROPS",        NULL,   LDAP_OPT_X_SASL_SECPROPS},
  93 #endif
  94
  95 #ifdef HAVE_TLS
  96         {1, ATTR_TLS,   "TLS_CERT",                     NULL,   LDAP_OPT_X_TLS_CERTFILE},
  97         {1, ATTR_TLS,   "TLS_KEY",                      NULL,   LDAP_OPT_X_TLS_KEYFILE},
  98         {0, ATTR_TLS,   "TLS_CACERT",           NULL,   LDAP_OPT_X_TLS_CACERTFILE},
  99         {0, ATTR_TLS,   "TLS_CACERTDIR",        NULL,   LDAP_OPT_X_TLS_CACERTDIR},
 100         {0, ATTR_TLS,   "TLS_REQCERT",          NULL,   LDAP_OPT_X_TLS_REQUIRE_CERT},
 101         {0, ATTR_TLS,   "TLS_RANDFILE",         NULL,   LDAP_OPT_X_TLS_RANDOM_FILE},
 102         {0, ATTR_TLS,   "TLS_CIPHER_SUITE",     NULL,   LDAP_OPT_X_TLS_CIPHER_SUITE},
 103
 104 #ifdef HAVE_OPENSSL_CRL
 105         {0, ATTR_TLS,   "TLS_CRLCHECK",         NULL,   LDAP_OPT_X_TLS_CRLCHECK},
 106 #endif
 107
 108 #endif
 109
 110         {0, ATTR_NONE,          NULL,           NULL,   0}
 111 };
 112
 113 #define MAX_LDAP_ATTR_LEN  sizeof("TLS_CIPHER_SUITE")
 114 #define MAX_LDAP_ENV_PREFIX_LEN 8
 115
 116 static void openldap_ldap_init_w_conf(
 117         const char *file, int userconf )
 118 {
 119         char linebuf[ AC_LINE_MAX ];
 120         FILE *fp;
 121         int i;
 122         char *cmd, *opt;
 123         char *start, *end;
 124         struct ldapoptions *gopts;
 125
 126         if ((gopts = LDAP_INT_GLOBAL_OPT()) == NULL) {
 127                 return;                 /* Could not allocate mem for global options */
 128         }
 129
 130         if (file == NULL) {
 131                 /* no file name */
 132                 return;
 133         }
 134
 135         Debug(LDAP_DEBUG_TRACE, "ldap_init: trying %s\n", file, 0, 0);
 136
 137         fp = fopen(file, "r");
 138         if(fp == NULL) {
 139                 /* could not open file */
 140                 return;
 141         }
 142
 143         Debug(LDAP_DEBUG_TRACE, "ldap_init: using %s\n", file, 0, 0);
 144
 145         while((start = fgets(linebuf, sizeof(linebuf), fp)) != NULL) {
 146                 /* skip lines starting with '#' */
 147                 if(*start == '#') continue;
 148
 149                 /* trim leading white space */
 150                 while((*start != '\0') && isspace((unsigned char) *start))
 151                         start++;
 152
 153                 /* anything left? */
 154                 if(*start == '\0') continue;
 155
 156                 /* trim trailing white space */
 157                 end = &start[strlen(start)-1];
 158                 while(isspace((unsigned char)*end)) end--;
 159                 end[1] = '\0';
 160
 161                 /* anything left? */
 162                 if(*start == '\0') continue;
 163
 164
 165                 /* parse the command */
 166                 cmd=start;
 167                 while((*start != '\0') && !isspace((unsigned char)*start)) {
 168                         start++;
 169                 }
 170                 if(*start == '\0') {
 171                         /* command has no argument */
 172                         continue;
 173                 }
 174
 175                 *start++ = '\0';
 176
 177                 /* we must have some whitespace to skip */
 178                 while(isspace((unsigned char)*start)) start++;
 179                 opt = start;
 180
 181                 for(i=0; attrs[i].type != ATTR_NONE; i++) {
 182                         void *p;
 183
 184                         if( !userconf && attrs[i].useronly ) {
 185                                 continue;
 186                         }
 187
 188                         if(strcasecmp(cmd, attrs[i].name) != 0) {
 189                                 continue;
 190                         }
 191
 192                         switch(attrs[i].type) {
 193                         case ATTR_BOOL:
 194                                 if((strcasecmp(opt, "on") == 0)
 195                                         || (strcasecmp(opt, "yes") == 0)
 196                                         || (strcasecmp(opt, "true") == 0))
 197                                 {
 198                                         LDAP_BOOL_SET(gopts, attrs[i].offset);
 199
 200                                 } else {
 201                                         LDAP_BOOL_CLR(gopts, attrs[i].offset);
 202                                 }
 203
 204                                 break;
 205
 206                         case ATTR_INT:
 207                                 p = &((char *) gopts)[attrs[i].offset];
 208                                 * (int*) p = atoi(opt);
 209                                 break;
 210
 211                         case ATTR_KV: {
 212                                         const struct ol_keyvalue *kv;
 213
 214                                         for(kv = attrs[i].data;
 215                                                 kv->key != NULL;
 216                                                 kv++) {
 217
 218                                                 if(strcasecmp(opt, kv->key) == 0) {
 219                                                         p = &((char *) gopts)[attrs[i].offset];
 220                                                         * (int*) p = kv->value;
 221                                                         break;
 222                                                 }
 223                                         }
 224                                 } break;
 225
 226                         case ATTR_STRING:
 227                                 p = &((char *) gopts)[attrs[i].offset];
 228                                 if (* (char**) p != NULL) LDAP_FREE(* (char**) p);
 229                                 * (char**) p = LDAP_STRDUP(opt);
 230                                 break;
 231                         case ATTR_OPTION:
 232                                 ldap_set_option( NULL, attrs[i].offset, opt );
 233                                 break;
 234                         case ATTR_SASL:
 235 #ifdef HAVE_CYRUS_SASL
 236                                 ldap_int_sasl_config( gopts, attrs[i].offset, opt );
 237 #endif
 238                                 break;
 239                         case ATTR_TLS:
 240 #ifdef HAVE_TLS
 241                                 ldap_int_tls_config( NULL, attrs[i].offset, opt );
 242 #endif
 243                                 break;
 244                         }
 245
 246                         break;
 247                 }
 248         }
 249
 250         fclose(fp);
 251 }
 252
 253 static void openldap_ldap_init_w_sysconf(const char *file)
 254 {
 255         openldap_ldap_init_w_conf( file, 0 );
 256 }
 257
 258 static void openldap_ldap_init_w_userconf(const char *file)
 259 {
 260         char *home;
 261         char *path = NULL;
 262
 263         if (file == NULL) {
 264                 /* no file name */
 265                 return;
 266         }
 267
 268         home = getenv("HOME");
 269
 270         if (home != NULL) {
 271                 Debug(LDAP_DEBUG_TRACE, "ldap_init: HOME env is %s\n",
 272                       home, 0, 0);
 273                 path = LDAP_MALLOC(strlen(home) + strlen(file) + sizeof( LDAP_DIRSEP "."));
 274         } else {
 275                 Debug(LDAP_DEBUG_TRACE, "ldap_init: HOME env is NULL\n",
 276                       0, 0, 0);
 277         }
 278
 279         if(home != NULL && path != NULL) {
 280                 /* we assume UNIX path syntax is used... */
 281
 282                 /* try ~/file */
 283                 sprintf(path, "%s" LDAP_DIRSEP "%s", home, file);
 284                 openldap_ldap_init_w_conf(path, 1);
 285
 286                 /* try ~/.file */
 287                 sprintf(path, "%s" LDAP_DIRSEP ".%s", home, file);
 288                 openldap_ldap_init_w_conf(path, 1);
 289         }
 290
 291         if(path != NULL) {
 292                 LDAP_FREE(path);
 293         }
 294
 295         /* try file */
 296         openldap_ldap_init_w_conf(file, 1);
 297 }
 298
 299 static void openldap_ldap_init_w_env(
 300                 struct ldapoptions *gopts,
 301                 const char *prefix)
 302 {
 303         char buf[MAX_LDAP_ATTR_LEN+MAX_LDAP_ENV_PREFIX_LEN];
 304         int len;
 305         int i;
 306         void *p;
 307         char *value;
 308
 309         if (prefix == NULL) {
 310                 prefix = LDAP_ENV_PREFIX;
 311         }
 312
 313         strncpy(buf, prefix, MAX_LDAP_ENV_PREFIX_LEN);
 314         buf[MAX_LDAP_ENV_PREFIX_LEN] = '\0';
 315         len = strlen(buf);
 316
 317         for(i=0; attrs[i].type != ATTR_NONE; i++) {
 318                 strcpy(&buf[len], attrs[i].name);
 319                 value = getenv(buf);
 320
 321                 if(value == NULL) {
 322                         continue;
 323                 }
 324
 325                 switch(attrs[i].type) {
 326                 case ATTR_BOOL:
 327                         if((strcasecmp(value, "on") == 0)
 328                                 || (strcasecmp(value, "yes") == 0)
 329                                 || (strcasecmp(value, "true") == 0))
 330                         {
 331                                 LDAP_BOOL_SET(gopts, attrs[i].offset);
 332
 333                         } else {
 334                                 LDAP_BOOL_CLR(gopts, attrs[i].offset);
 335                         }
 336                         break;
 337
 338                 case ATTR_INT:
 339                         p = &((char *) gopts)[attrs[i].offset];
 340                         * (int*) p = atoi(value);
 341                         break;
 342
 343                 case ATTR_KV: {
 344                                 const struct ol_keyvalue *kv;
 345
 346                                 for(kv = attrs[i].data;
 347                                         kv->key != NULL;
 348                                         kv++) {
 349
 350                                         if(strcasecmp(value, kv->key) == 0) {
 351                                                 p = &((char *) gopts)[attrs[i].offset];
 352                                                 * (int*) p = kv->value;
 353                                                 break;
 354                                         }
 355                                 }
 356                         } break;
 357
 358                 case ATTR_STRING:
 359                         p = &((char *) gopts)[attrs[i].offset];
 360                         if (* (char**) p != NULL) LDAP_FREE(* (char**) p);
 361                         if (*value == '\0') {
 362                                 * (char**) p = NULL;
 363                         } else {
 364                                 * (char**) p = LDAP_STRDUP(value);
 365                         }
 366                         break;
 367                 case ATTR_OPTION:
 368                         ldap_set_option( NULL, attrs[i].offset, value );
 369                         break;
 370                 case ATTR_SASL:
 371 #ifdef HAVE_CYRUS_SASL
 372                         ldap_int_sasl_config( gopts, attrs[i].offset, value );
 373 #endif
 374                         break;
 375                 case ATTR_TLS:
 376 #ifdef HAVE_TLS
 377                         ldap_int_tls_config( NULL, attrs[i].offset, value );
 378 #endif
 379                         break;
 380                 }
 381         }
 382 }
 383
 384 #if defined(__GNUC__)
 385 /* Declare this function as a destructor so that it will automatically be
 386  * invoked either at program exit (if libldap is a static library) or
 387  * at unload time (if libldap is a dynamic library).
 388  *
 389  * Sorry, don't know how to handle this for non-GCC environments.
 390  */
 391 static void ldap_int_destroy_global_options(void)
 392         __attribute__ ((destructor));
 393 #endif
 394
 395 static void
 396 ldap_int_destroy_global_options(void)
 397 {
 398         struct ldapoptions *gopts = LDAP_INT_GLOBAL_OPT();
 399
 400         if ( gopts == NULL )
 401                 return;
 402
 403         gopts->ldo_valid = LDAP_UNINITIALIZED;
 404
 405         if ( gopts->ldo_defludp ) {
 406                 ldap_free_urllist( gopts->ldo_defludp );
 407                 gopts->ldo_defludp = NULL;
 408         }
 409 #if defined(HAVE_WINSOCK) || defined(HAVE_WINSOCK2)
 410         WSACleanup( );
 411 #endif
 412
 413 #if defined(LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND) \
 414         || defined(HAVE_TLS) || defined(HAVE_CYRUS_SASL)
 415         if ( ldap_int_hostname ) {
 416                 LDAP_FREE( ldap_int_hostname );
 417                 ldap_int_hostname = NULL;
 418         }
 419 #endif
 420 #ifdef HAVE_CYRUS_SASL
 421         if ( gopts->ldo_def_sasl_authcid ) {
 422                 LDAP_FREE( gopts->ldo_def_sasl_authcid );
 423                 gopts->ldo_def_sasl_authcid = NULL;
 424         }
 425 #endif
 426 }
 427
 428 /*
 429  * Initialize the global options structure with default values.
 430  */
 431 void ldap_int_initialize_global_options( struct ldapoptions *gopts, int *dbglvl )
 432 {
 433         if (dbglvl)
 434             gopts->ldo_debug = *dbglvl;
 435         else
 436                 gopts->ldo_debug = 0;
 437
 438         gopts->ldo_version   = LDAP_VERSION2;
 439         gopts->ldo_deref     = LDAP_DEREF_NEVER;
 440         gopts->ldo_timelimit = LDAP_NO_LIMIT;
 441         gopts->ldo_sizelimit = LDAP_NO_LIMIT;
 442
 443         gopts->ldo_tm_api = (struct timeval *)NULL;
 444         gopts->ldo_tm_net = (struct timeval *)NULL;
 445
 446         /* ldo_defludp will be freed by the termination handler
 447          */
 448         ldap_url_parselist(&gopts->ldo_defludp, "ldap://localhost/");
 449         gopts->ldo_defport = LDAP_PORT;
 450 #if !defined(__GNUC__) && !defined(PIC)
 451         /* Do this only for a static library, and only if we can't
 452          * arrange for it to be executed as a library destructor
 453          */
 454         atexit(ldap_int_destroy_global_options);
 455 #endif
 456
 457         gopts->ldo_refhoplimit = LDAP_DEFAULT_REFHOPLIMIT;
 458         gopts->ldo_rebind_proc = NULL;
 459         gopts->ldo_rebind_params = NULL;
 460
 461         LDAP_BOOL_ZERO(gopts);
 462
 463         LDAP_BOOL_SET(gopts, LDAP_BOOL_REFERRALS);
 464
 465 #ifdef LDAP_CONNECTIONLESS
 466         gopts->ldo_peer = NULL;
 467         gopts->ldo_cldapdn = NULL;
 468         gopts->ldo_is_udp = 0;
 469 #endif
 470
 471 #ifdef HAVE_CYRUS_SASL
 472         gopts->ldo_def_sasl_mech = NULL;
 473         gopts->ldo_def_sasl_realm = NULL;
 474         gopts->ldo_def_sasl_authcid = NULL;
 475         gopts->ldo_def_sasl_authzid = NULL;
 476
 477         memset( &gopts->ldo_sasl_secprops,
 478                 '\0', sizeof(gopts->ldo_sasl_secprops) );
 479
 480         gopts->ldo_sasl_secprops.max_ssf = INT_MAX;
 481         gopts->ldo_sasl_secprops.maxbufsize = SASL_MAX_BUFF_SIZE;
 482         gopts->ldo_sasl_secprops.security_flags =
 483                 SASL_SEC_NOPLAINTEXT | SASL_SEC_NOANONYMOUS;
 484 #endif
 485
 486 #ifdef HAVE_TLS
 487         gopts->ldo_tls_connect_cb = NULL;
 488         gopts->ldo_tls_connect_arg = NULL;
 489 #endif
 490
 491         gopts->ldo_valid = LDAP_INITIALIZED;
 492         return;
 493 }
 494
 495 #if defined(LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND) \
 496         || defined(HAVE_TLS) || defined(HAVE_CYRUS_SASL)
 497 char * ldap_int_hostname = NULL;
 498 #endif
 499
 500 void ldap_int_initialize( struct ldapoptions *gopts, int *dbglvl )
 501 {
 502         if ( gopts->ldo_valid == LDAP_INITIALIZED ) {
 503                 return;
 504         }
 505
 506         ldap_int_error_init();
 507
 508         ldap_int_utils_init();
 509
 510 #ifdef HAVE_WINSOCK2
 511 {       WORD wVersionRequested;
 512         WSADATA wsaData;
 513
 514         wVersionRequested = MAKEWORD( 2, 0 );
 515         if ( WSAStartup( wVersionRequested, &wsaData ) != 0 ) {
 516                 /* Tell the user that we couldn't find a usable */
 517                 /* WinSock DLL.                                  */
 518                 return;
 519         }
 520
 521         /* Confirm that the WinSock DLL supports 2.0.*/
 522         /* Note that if the DLL supports versions greater    */
 523         /* than 2.0 in addition to 2.0, it will still return */
 524         /* 2.0 in wVersion since that is the version we      */
 525         /* requested.                                        */
 526
 527         if ( LOBYTE( wsaData.wVersion ) != 2 ||
 528                 HIBYTE( wsaData.wVersion ) != 0 )
 529         {
 530             /* Tell the user that we couldn't find a usable */
 531             /* WinSock DLL.                                  */
 532             WSACleanup( );
 533             return;
 534         }
 535 }       /* The WinSock DLL is acceptable. Proceed. */
 536 #elif HAVE_WINSOCK
 537 {       WSADATA wsaData;
 538         if ( WSAStartup( 0x0101, &wsaData ) != 0 ) {
 539             return;
 540         }
 541 }
 542 #endif
 543
 544 #if defined(LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND) \
 545         || defined(HAVE_TLS) || defined(HAVE_CYRUS_SASL)
 546         {
 547                 char    *name = ldap_int_hostname;
 548
 549                 ldap_int_hostname = ldap_pvt_get_fqdn( name );
 550
 551                 if ( name != NULL && name != ldap_int_hostname ) {
 552                         LDAP_FREE( name );
 553                 }
 554         }
 555 #endif
 556
 557 #ifndef HAVE_POLL
 558         if ( ldap_int_tblsize == 0 ) ldap_int_ip_init();
 559 #endif
 560
 561         ldap_int_initialize_global_options(gopts, NULL);
 562
 563         if( getenv("LDAPNOINIT") != NULL ) {
 564                 return;
 565         }
 566
 567 #ifdef HAVE_CYRUS_SASL
 568         {
 569                 /* set authentication identity to current user name */
 570                 char *user = getenv("USER");
 571
 572                 if( user == NULL ) user = getenv("USERNAME");
 573                 if( user == NULL ) user = getenv("LOGNAME");
 574
 575                 if( user != NULL ) {
 576                         gopts->ldo_def_sasl_authcid = LDAP_STRDUP( user );
 577                 }
 578     }
 579 #endif
 580
 581         openldap_ldap_init_w_sysconf(LDAP_CONF_FILE);
 582         openldap_ldap_init_w_userconf(LDAP_USERRC_FILE);
 583
 584         {
 585                 char *altfile = getenv(LDAP_ENV_PREFIX "CONF");
 586
 587                 if( altfile != NULL ) {
 588                         Debug(LDAP_DEBUG_TRACE, "ldap_init: %s env is %s\n",
 589                               LDAP_ENV_PREFIX "CONF", altfile, 0);
 590                         openldap_ldap_init_w_sysconf( altfile );
 591                 }
 592                 else
 593                         Debug(LDAP_DEBUG_TRACE, "ldap_init: %s env is NULL\n",
 594                               LDAP_ENV_PREFIX "CONF", 0, 0);
 595         }
 596
 597         {
 598                 char *altfile = getenv(LDAP_ENV_PREFIX "RC");
 599
 600                 if( altfile != NULL ) {
 601                         Debug(LDAP_DEBUG_TRACE, "ldap_init: %s env is %s\n",
 602                               LDAP_ENV_PREFIX "RC", altfile, 0);
 603                         openldap_ldap_init_w_userconf( altfile );
 604                 }
 605                 else
 606                         Debug(LDAP_DEBUG_TRACE, "ldap_init: %s env is NULL\n",
 607                               LDAP_ENV_PREFIX "RC", 0, 0);
 608         }
 609
 610         openldap_ldap_init_w_env(gopts, NULL);
 611 }