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

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
   4  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   5  */
   6 #include "portable.h"
   7
   8 #include <stdio.h>
   9 #include <ac/stdlib.h>
  10
  11 #include <ac/socket.h>
  12 #include <ac/string.h>
  13 #include <ac/ctype.h>
  14 #include <ac/time.h>
  15
  16 #include <limits.h>
  17
  18 #include "ldap-int.h"
  19 #include "ldap_defaults.h"
  20
  21 struct ldapoptions ldap_int_global_options =
  22         { LDAP_UNINITIALIZED, LDAP_DEBUG_NONE };
  23
  24 #define ATTR_NONE       0
  25 #define ATTR_BOOL       1
  26 #define ATTR_INT        2
  27 #define ATTR_KV         3
  28 #define ATTR_STRING     4
  29 #define ATTR_OPTION     5
  30
  31 #define ATTR_SASL       6
  32 #define ATTR_TLS        7
  33
  34 struct ol_keyvalue {
  35         const char *            key;
  36         int                     value;
  37 };
  38
  39 static const struct ol_keyvalue deref_kv[] = {
  40         {"never", LDAP_DEREF_NEVER},
  41         {"searching", LDAP_DEREF_SEARCHING},
  42         {"finding", LDAP_DEREF_FINDING},
  43         {"always", LDAP_DEREF_ALWAYS},
  44         {NULL, 0}
  45 };
  46
  47 static const struct ol_attribute {
  48         int                     useronly;
  49         int                     type;
  50         const char *    name;
  51         const void *    data;
  52         size_t          offset;
  53 } attrs[] = {
  54         {0, ATTR_KV,            "DEREF",        deref_kv, /* or &deref_kv[0] */
  55                 offsetof(struct ldapoptions, ldo_deref)},
  56         {0, ATTR_INT,           "SIZELIMIT",    NULL,
  57                 offsetof(struct ldapoptions, ldo_sizelimit)},
  58         {0, ATTR_INT,           "TIMELIMIT",    NULL,
  59                 offsetof(struct ldapoptions, ldo_timelimit)},
  60         {1, ATTR_STRING,        "BINDDN",               NULL,
  61                 offsetof(struct ldapoptions, ldo_defbinddn)},
  62         {0, ATTR_STRING,        "BASE",                 NULL,
  63                 offsetof(struct ldapoptions, ldo_defbase)},
  64         {0, ATTR_INT,           "PORT",                 NULL,           /* deprecated */
  65                 offsetof(struct ldapoptions, ldo_defport)},
  66         {0, ATTR_OPTION,        "HOST",                 NULL,   LDAP_OPT_HOST_NAME}, /* deprecated */
  67         {0, ATTR_OPTION,        "URI",                  NULL,   LDAP_OPT_URI}, /* replaces HOST/PORT */
  68         {0, ATTR_BOOL,          "REFERRALS",    NULL,   LDAP_BOOL_REFERRALS},
  69         {0, ATTR_BOOL,          "RESTART",              NULL,   LDAP_BOOL_RESTART},
  70
  71 #ifdef HAVE_CYRUS_SASL
  72         {1, ATTR_STRING,        "SASL_MECH",            NULL,
  73                 offsetof(struct ldapoptions, ldo_def_sasl_mech)},
  74         {1, ATTR_STRING,        "SASL_REALM",           NULL,
  75                 offsetof(struct ldapoptions, ldo_def_sasl_realm)},
  76         {1, ATTR_STRING,        "SASL_AUTHCID",         NULL,
  77                 offsetof(struct ldapoptions, ldo_def_sasl_authcid)},
  78         {1, ATTR_STRING,        "SASL_AUTHZID",         NULL,
  79                 offsetof(struct ldapoptions, ldo_def_sasl_authzid)},
  80         {0, ATTR_SASL,          "SASL_SECPROPS",        NULL,   LDAP_OPT_X_SASL_SECPROPS},
  81 #endif
  82
  83 #ifdef HAVE_TLS
  84         {0, ATTR_TLS,           "TLS",                  NULL,   LDAP_OPT_X_TLS},
  85         {1, ATTR_TLS,           "TLS_CERT",             NULL,   LDAP_OPT_X_TLS_CERTFILE},
  86         {1, ATTR_TLS,           "TLS_KEY",              NULL,   LDAP_OPT_X_TLS_KEYFILE},
  87         {0, ATTR_TLS,           "TLS_CACERT",   NULL,   LDAP_OPT_X_TLS_CACERTFILE},
  88         {0, ATTR_TLS,           "TLS_CACERTDIR",NULL,   LDAP_OPT_X_TLS_CACERTDIR},
  89         {0, ATTR_TLS,           "TLS_REQCERT",  NULL,   LDAP_OPT_X_TLS_REQUIRE_CERT},
  90         {0, ATTR_TLS,           "TLS_RANDFILE", NULL,   LDAP_OPT_X_TLS_RANDOM_FILE},
  91 #endif
  92
  93         {0, ATTR_NONE,          NULL,           NULL,   0}
  94 };
  95
  96 #define MAX_LDAP_ATTR_LEN  sizeof("TLS_CACERTDIR")
  97 #define MAX_LDAP_ENV_PREFIX_LEN 8
  98
  99 static void openldap_ldap_init_w_conf(
 100         const char *file, int userconf )
 101 {
 102         char linebuf[128];
 103         FILE *fp;
 104         int i;
 105         char *cmd, *opt;
 106         char *start, *end;
 107         struct ldapoptions *gopts;
 108
 109         if ((gopts = LDAP_INT_GLOBAL_OPT()) == NULL) {
 110                 return;                 /* Could not allocate mem for global options */
 111         }
 112
 113         if (file == NULL) {
 114                 /* no file name */
 115                 return;
 116         }
 117
 118         Debug(LDAP_DEBUG_TRACE, "ldap_init: trying %s\n", file, 0, 0);
 119
 120         fp = fopen(file, "r");
 121         if(fp == NULL) {
 122                 /* could not open file */
 123                 return;
 124         }
 125
 126         Debug(LDAP_DEBUG_TRACE, "ldap_init: using %s\n", file, 0, 0);
 127
 128         while((start = fgets(linebuf, sizeof(linebuf), fp)) != NULL) {
 129                 /* skip lines starting with '#' */
 130                 if(*start == '#') continue;
 131
 132                 /* trim leading white space */
 133                 while((*start != '\0') && isspace((unsigned char) *start))
 134                         start++;
 135
 136                 /* anything left? */
 137                 if(*start == '\0') continue;
 138
 139                 /* trim trailing white space */
 140                 end = &start[strlen(start)-1];
 141                 while(isspace((unsigned char)*end)) end--;
 142                 end[1] = '\0';
 143
 144                 /* anything left? */
 145                 if(*start == '\0') continue;
 146
 147
 148                 /* parse the command */
 149                 cmd=start;
 150                 while((*start != '\0') && !isspace((unsigned char)*start)) {
 151                         start++;
 152                 }
 153                 if(*start == '\0') {
 154                         /* command has no argument */
 155                         continue;
 156                 }
 157
 158                 *start++ = '\0';
 159
 160                 /* we must have some whitespace to skip */
 161                 while(isspace((unsigned char)*start)) start++;
 162                 opt = start;
 163
 164                 for(i=0; attrs[i].type != ATTR_NONE; i++) {
 165                         void *p;
 166
 167                         if( !userconf && attrs[i].useronly ) {
 168                                 continue;
 169                         }
 170
 171                         if(strcasecmp(cmd, attrs[i].name) != 0) {
 172                                 continue;
 173                         }
 174
 175                         switch(attrs[i].type) {
 176                         case ATTR_BOOL:
 177                                 if((strcasecmp(opt, "on") == 0)
 178                                         || (strcasecmp(opt, "yes") == 0)
 179                                         || (strcasecmp(opt, "true") == 0))
 180                                 {
 181                                         LDAP_BOOL_SET(gopts, attrs[i].offset);
 182
 183                                 } else {
 184                                         LDAP_BOOL_CLR(gopts, attrs[i].offset);
 185                                 }
 186
 187                                 break;
 188
 189                         case ATTR_INT:
 190                                 p = &((char *) gopts)[attrs[i].offset];
 191                                 * (int*) p = atoi(opt);
 192                                 break;
 193
 194                         case ATTR_KV: {
 195                                         const struct ol_keyvalue *kv;
 196
 197                                         for(kv = attrs[i].data;
 198                                                 kv->key != NULL;
 199                                                 kv++) {
 200
 201                                                 if(strcasecmp(opt, kv->key) == 0) {
 202                                                         p = &((char *) gopts)[attrs[i].offset];
 203                                                         * (int*) p = kv->value;
 204                                                         break;
 205                                                 }
 206                                         }
 207                                 } break;
 208
 209                         case ATTR_STRING:
 210                                 p = &((char *) gopts)[attrs[i].offset];
 211                                 if (* (char**) p != NULL) LDAP_FREE(* (char**) p);
 212                                 * (char**) p = LDAP_STRDUP(opt);
 213                                 break;
 214                         case ATTR_OPTION:
 215                                 ldap_set_option( NULL, attrs[i].offset, opt );
 216                                 break;
 217                         case ATTR_SASL:
 218 #ifdef HAVE_CYRUS_SASL
 219                                 ldap_int_sasl_config( gopts, attrs[i].offset, opt );
 220 #endif
 221                                 break;
 222                         case ATTR_TLS:
 223 #ifdef HAVE_TLS
 224                                 ldap_int_tls_config( NULL, attrs[i].offset, opt );
 225 #endif
 226                                 break;
 227                         }
 228
 229                         break;
 230                 }
 231         }
 232
 233         fclose(fp);
 234 }
 235
 236 static void openldap_ldap_init_w_sysconf(const char *file)
 237 {
 238         openldap_ldap_init_w_conf( file, 0 );
 239 }
 240
 241 static void openldap_ldap_init_w_userconf(const char *file)
 242 {
 243         char *home;
 244         char *path = NULL;
 245
 246         if (file == NULL) {
 247                 /* no file name */
 248                 return;
 249         }
 250
 251         home = getenv("HOME");
 252
 253         if (home != NULL) {
 254                 Debug(LDAP_DEBUG_TRACE, "ldap_init: HOME env is %s\n",
 255                       home, 0, 0);
 256                 path = LDAP_MALLOC(strlen(home) + strlen(file) + 3);
 257         } else {
 258                 Debug(LDAP_DEBUG_TRACE, "ldap_init: HOME env is NULL\n",
 259                       0, 0, 0);
 260         }
 261
 262         if(home != NULL && path != NULL) {
 263                 /* we assume UNIX path syntax is used... */
 264
 265                 /* try ~/file */
 266                 sprintf(path, "%s/%s", home, file);
 267                 openldap_ldap_init_w_conf(path, 1);
 268
 269                 /* try ~/.file */
 270                 sprintf(path, "%s/.%s", home, file);
 271                 openldap_ldap_init_w_conf(path, 1);
 272         }
 273
 274         if(path != NULL) {
 275                 LDAP_FREE(path);
 276         }
 277
 278         /* try file */
 279         openldap_ldap_init_w_conf(file, 1);
 280 }
 281
 282 static void openldap_ldap_init_w_env(
 283                 struct ldapoptions *gopts,
 284                 const char *prefix)
 285 {
 286         char buf[MAX_LDAP_ATTR_LEN+MAX_LDAP_ENV_PREFIX_LEN];
 287         int len;
 288         int i;
 289         void *p;
 290         char *value;
 291
 292         if (prefix == NULL) {
 293                 prefix = LDAP_ENV_PREFIX;
 294         }
 295
 296         strncpy(buf, prefix, MAX_LDAP_ENV_PREFIX_LEN);
 297         buf[MAX_LDAP_ENV_PREFIX_LEN] = '\0';
 298         len = strlen(buf);
 299
 300         for(i=0; attrs[i].type != ATTR_NONE; i++) {
 301                 strcpy(&buf[len], attrs[i].name);
 302                 value = getenv(buf);
 303
 304                 if(value == NULL) {
 305                         continue;
 306                 }
 307
 308                 switch(attrs[i].type) {
 309                 case ATTR_BOOL:
 310                         if((strcasecmp(value, "on") == 0)
 311                                 || (strcasecmp(value, "yes") == 0)
 312                                 || (strcasecmp(value, "true") == 0))
 313                         {
 314                                 LDAP_BOOL_SET(gopts, attrs[i].offset);
 315
 316                         } else {
 317                                 LDAP_BOOL_CLR(gopts, attrs[i].offset);
 318                         }
 319                         break;
 320
 321                 case ATTR_INT:
 322                         p = &((char *) gopts)[attrs[i].offset];
 323                         * (int*) p = atoi(value);
 324                         break;
 325
 326                 case ATTR_KV: {
 327                                 const struct ol_keyvalue *kv;
 328
 329                                 for(kv = attrs[i].data;
 330                                         kv->key != NULL;
 331                                         kv++) {
 332
 333                                         if(strcasecmp(value, kv->key) == 0) {
 334                                                 p = &((char *) gopts)[attrs[i].offset];
 335                                                 * (int*) p = kv->value;
 336                                                 break;
 337                                         }
 338                                 }
 339                         } break;
 340
 341                 case ATTR_STRING:
 342                         p = &((char *) gopts)[attrs[i].offset];
 343                         if (* (char**) p != NULL) LDAP_FREE(* (char**) p);
 344                         if (*value == '\0') {
 345                                 * (char**) p = NULL;
 346                         } else {
 347                                 * (char**) p = LDAP_STRDUP(value);
 348                         }
 349                         break;
 350                 case ATTR_OPTION:
 351                         ldap_set_option( NULL, attrs[i].offset, value );
 352                         break;
 353                 case ATTR_SASL:
 354 #ifdef HAVE_CYRUS_SASL
 355                         ldap_int_sasl_config( gopts, attrs[i].offset, value );
 356 #endif
 357                         break;
 358                 case ATTR_TLS:
 359 #ifdef HAVE_TLS
 360                         ldap_int_tls_config( NULL, attrs[i].offset, value );
 361 #endif
 362                         break;
 363                 }
 364         }
 365 }
 366
 367 /*
 368  * Initialize the global options structure with default values.
 369  */
 370 void ldap_int_initialize_global_options( struct ldapoptions *gopts, int *dbglvl )
 371 {
 372         if (dbglvl)
 373             gopts->ldo_debug = *dbglvl;
 374         else
 375                 gopts->ldo_debug = 0;
 376
 377         gopts->ldo_version   = LDAP_VERSION2;
 378         gopts->ldo_deref     = LDAP_DEREF_NEVER;
 379         gopts->ldo_timelimit = LDAP_NO_LIMIT;
 380         gopts->ldo_sizelimit = LDAP_NO_LIMIT;
 381
 382         gopts->ldo_tm_api = (struct timeval *)NULL;
 383         gopts->ldo_tm_net = (struct timeval *)NULL;
 384
 385         /* ldo_defludp is leaked, we should have an at_exit() handler
 386          * to free this and whatever else needs to cleaned up.
 387          */
 388         ldap_url_parselist(&gopts->ldo_defludp, "ldap://localhost/");
 389         gopts->ldo_defport = LDAP_PORT;
 390
 391         gopts->ldo_refhoplimit = LDAP_DEFAULT_REFHOPLIMIT;
 392         gopts->ldo_rebind_proc = NULL;
 393         gopts->ldo_rebind_params = NULL;
 394
 395         LDAP_BOOL_ZERO(gopts);
 396
 397         LDAP_BOOL_SET(gopts, LDAP_BOOL_REFERRALS);
 398
 399 #ifdef LDAP_CONNECTIONLESS
 400         gopts->ldo_peer = NULL;
 401         gopts->ldo_cldapdn = NULL;
 402         gopts->ldo_is_udp = 0;
 403 #endif
 404
 405 #ifdef HAVE_CYRUS_SASL
 406         gopts->ldo_def_sasl_mech = NULL;
 407         gopts->ldo_def_sasl_realm = NULL;
 408         gopts->ldo_def_sasl_authcid = NULL;
 409         gopts->ldo_def_sasl_authzid = NULL;
 410
 411         memset( &gopts->ldo_sasl_secprops,
 412                 '\0', sizeof(gopts->ldo_sasl_secprops) );
 413
 414         gopts->ldo_sasl_secprops.max_ssf = INT_MAX;
 415         gopts->ldo_sasl_secprops.maxbufsize = SASL_MAX_BUFF_SIZE;
 416         gopts->ldo_sasl_secprops.security_flags =
 417                 SASL_SEC_NOPLAINTEXT | SASL_SEC_NOANONYMOUS;
 418 #endif
 419
 420         gopts->ldo_valid = LDAP_INITIALIZED;
 421         return;
 422 }
 423
 424 #if defined(LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND) \
 425         || defined(HAVE_TLS) || defined(HAVE_CYRUS_SASL)
 426 char * ldap_int_hostname = NULL;
 427 #endif
 428
 429 void ldap_int_initialize( struct ldapoptions *gopts, int *dbglvl )
 430 {
 431         if ( gopts->ldo_valid == LDAP_INITIALIZED ) {
 432                 return;
 433         }
 434
 435         ldap_int_error_init();
 436
 437 #if defined(LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND) \
 438         || defined(HAVE_TLS) || defined(HAVE_CYRUS_SASL)
 439         ldap_int_hostname = ldap_pvt_get_fqdn( ldap_int_hostname );
 440 #endif
 441
 442         ldap_int_utils_init();
 443
 444         if ( ldap_int_tblsize == 0 )
 445                 ldap_int_ip_init();
 446
 447         ldap_int_initialize_global_options(gopts, NULL);
 448
 449         if( getenv("LDAPNOINIT") != NULL ) {
 450                 return;
 451         }
 452
 453 #ifdef HAVE_CYRUS_SASL
 454         {
 455                 /* set authentication identity to current user name */
 456                 char *user = getenv("USER");
 457
 458                 if( user == NULL ) user = getenv("USERNAME");
 459                 if( user == NULL ) user = getenv("LOGNAME");
 460
 461                 if( user != NULL ) {
 462                         /* this value is leaked, need at_exit() handler */
 463                         gopts->ldo_def_sasl_authcid = LDAP_STRDUP( user );
 464                 }
 465     }
 466 #endif
 467
 468         openldap_ldap_init_w_sysconf(LDAP_CONF_FILE);
 469         openldap_ldap_init_w_userconf(LDAP_USERRC_FILE);
 470
 471         {
 472                 char *altfile = getenv(LDAP_ENV_PREFIX "CONF");
 473
 474                 if( altfile != NULL ) {
 475                         Debug(LDAP_DEBUG_TRACE, "ldap_init: %s env is %s\n",
 476                               LDAP_ENV_PREFIX "CONF", altfile, 0);
 477                         openldap_ldap_init_w_sysconf( altfile );
 478                 }
 479                 else
 480                         Debug(LDAP_DEBUG_TRACE, "ldap_init: %s env is NULL\n",
 481                               LDAP_ENV_PREFIX "CONF", 0, 0);
 482         }
 483
 484         {
 485                 char *altfile = getenv(LDAP_ENV_PREFIX "RC");
 486
 487                 if( altfile != NULL ) {
 488                         Debug(LDAP_DEBUG_TRACE, "ldap_init: %s env is %s\n",
 489                               LDAP_ENV_PREFIX "RC", altfile, 0);
 490                         openldap_ldap_init_w_userconf( altfile );
 491                 }
 492                 else
 493                         Debug(LDAP_DEBUG_TRACE, "ldap_init: %s env is NULL\n",
 494                               LDAP_ENV_PREFIX "RC", 0, 0);
 495         }
 496
 497         openldap_ldap_init_w_env(gopts, NULL);
 498
 499         ldap_int_sasl_init();
 500 }