git.sur5r.net Git - openldap/blob - servers/slapd/back-ldap/bind.c

   1 /* bind.c - ldap backend bind function */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
   5  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   6  */
   7 /* This is an altered version */
   8 /*
   9  * Copyright 1999, Howard Chu, All rights reserved. <hyc@highlandsun.com>
  10  *
  11  * Permission is granted to anyone to use this software for any purpose
  12  * on any computer system, and to alter it and redistribute it, subject
  13  * to the following restrictions:
  14  *
  15  * 1. The author is not responsible for the consequences of use of this
  16  *    software, no matter how awful, even if they arise from flaws in it.
  17  *
  18  * 2. The origin of this software must not be misrepresented, either by
  19  *    explicit claim or by omission.  Since few users ever read sources,
  20  *    credits should appear in the documentation.
  21  *
  22  * 3. Altered versions must be plainly marked as such, and must not be
  23  *    misrepresented as being the original software.  Since few users
  24  *    ever read sources, credits should appear in the documentation.
  25  *
  26  * 4. This notice may not be removed or altered.
  27  *
  28  *
  29  *
  30  * Copyright 2000, Pierangelo Masarati, All rights reserved. <ando@sys-net.it>
  31  *
  32  * This software is being modified by Pierangelo Masarati.
  33  * The previously reported conditions apply to the modified code as well.
  34  * Changes in the original code are highlighted where required.
  35  * Credits for the original code go to the author, Howard Chu.
  36  */
  37
  38 #include "portable.h"
  39
  40 #include <stdio.h>
  41
  42 #include <ac/socket.h>
  43 #include <ac/string.h>
  44
  45
  46 #define AVL_INTERNAL
  47 #include "slap.h"
  48 #include "back-ldap.h"
  49
  50 #define PRINT_CONNTREE 0
  51
  52 int
  53 ldap_back_bind(
  54     Backend             *be,
  55     Connection          *conn,
  56     Operation           *op,
  57     const char          *dn,
  58     const char          *ndn,
  59     int                 method,
  60     struct berval       *cred,
  61         char            **edn
  62 )
  63 {
  64         struct ldapinfo *li = (struct ldapinfo *) be->be_private;
  65         struct ldapconn *lc;
  66
  67         char *mdn = NULL;
  68         int rc = 0;
  69
  70         *edn = NULL;
  71
  72         lc = ldap_back_getconn(li, conn, op);
  73         if ( !lc ) {
  74                 return( -1 );
  75         }
  76
  77         /*
  78          * Rewrite the bind dn if needed
  79          */
  80 #ifdef ENABLE_REWRITE
  81         switch ( rewrite_session( li->rwinfo, "bindDn", dn, conn, &mdn ) ) {
  82         case REWRITE_REGEXEC_OK:
  83                 if ( mdn == NULL ) {
  84                         mdn = ( char * )dn;
  85                 }
  86 #ifdef NEW_LOGGING
  87                 LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
  88                                 "[rw] bindDn: \"%s\" -> \"%s\"\n", dn, mdn ));
  89 #else /* !NEW_LOGGING */
  90                 Debug( LDAP_DEBUG_ARGS, "rw> bindDn: \"%s\" -> \"%s\"\n%s",
  91                                 dn, mdn, "" );
  92 #endif /* !NEW_LOGGING */
  93                 break;
  94
  95         case REWRITE_REGEXEC_UNWILLING:
  96                 send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
  97                                 NULL, "Unwilling to perform", NULL, NULL );
  98                 return( -1 );
  99
 100         case REWRITE_REGEXEC_ERR:
 101                 send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR,
 102                                 NULL, "Operations error", NULL, NULL );
 103                 return( -1 );
 104         }
 105 #else /* !ENABLE_REWRITE */
 106         mdn = ldap_back_dn_massage( li, ch_strdup( dn ), 0 );
 107 #endif /* !ENABLE_REWRITE */
 108
 109         rc = ldap_bind_s(lc->ld, mdn, cred->bv_val, method);
 110         if (rc != LDAP_SUCCESS) {
 111                 rc = ldap_back_op_result( lc, op );
 112         } else {
 113                 lc->bound = 1;
 114         }
 115
 116 #ifdef ENABLE_REWRITE
 117         if ( mdn != dn ) {
 118 #endif /* ENABLE_REWRITE */
 119         free( mdn );
 120 #ifdef ENABLE_REWRITE
 121         }
 122 #endif /* ENABLE_REWRITE */
 123
 124         return( rc );
 125 }
 126
 127 /*
 128  * ldap_back_conn_cmp
 129  *
 130  * compares two struct ldapconn based on the value of the conn pointer;
 131  * used by avl stuff
 132  */
 133 int
 134 ldap_back_conn_cmp(
 135         const void *c1,
 136         const void *c2
 137         )
 138 {
 139         struct ldapconn *lc1 = (struct ldapconn *)c1;
 140         struct ldapconn *lc2 = (struct ldapconn *)c2;
 141
 142         return ( ( lc1->conn < lc2->conn ) ? -1 : ( ( lc1->conn > lc2-> conn ) ? 1 : 0 ) );
 143 }
 144
 145 /*
 146  * ldap_back_conn_dup
 147  *
 148  * returns -1 in case a duplicate struct ldapconn has been inserted;
 149  * used by avl stuff
 150  */
 151 int
 152 ldap_back_conn_dup(
 153         void *c1,
 154         void *c2
 155         )
 156 {
 157         struct ldapconn *lc1 = (struct ldapconn *)c1;
 158         struct ldapconn *lc2 = (struct ldapconn *)c2;
 159
 160         return( ( lc1->conn == lc2->conn ) ? -1 : 0 );
 161 }
 162
 163 #if PRINT_CONNTREE > 0
 164 static void ravl_print( Avlnode *root, int depth )
 165 {
 166         int     i;
 167
 168         if ( root == 0 )
 169                 return;
 170
 171         ravl_print( root->avl_right, depth+1 );
 172
 173         for ( i = 0; i < depth; i++ )
 174                 printf( "   " );
 175
 176         printf( "c(%ld) %d\n", ((struct ldapconn *) root->avl_data)->conn->c_connid, root->avl_bf );
 177
 178         ravl_print( root->avl_left, depth+1 );
 179 }
 180
 181 static void myprint( Avlnode *root )
 182 {
 183         printf( "********\n" );
 184
 185         if ( root == 0 )
 186                 printf( "\tNULL\n" );
 187
 188         else
 189                 ravl_print( root, 0 );
 190
 191         printf( "********\n" );
 192 }
 193 #endif /* PRINT_CONNTREE */
 194
 195 struct ldapconn *
 196 ldap_back_getconn(struct ldapinfo *li, Connection *conn, Operation *op)
 197 {
 198         struct ldapconn *lc, lc_curr;
 199         LDAP *ld;
 200
 201         /* Searches for a ldapconn in the avl tree */
 202         lc_curr.conn = conn;
 203         ldap_pvt_thread_mutex_lock( &li->conn_mutex );
 204         lc = (struct ldapconn *)avl_find( li->conntree,
 205                 (caddr_t)&lc_curr, ldap_back_conn_cmp );
 206         ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
 207
 208         /* Looks like we didn't get a bind. Open a new session... */
 209         if (!lc) {
 210                 int vers = conn->c_protocol;
 211                 int err = ldap_initialize(&ld, li->url);
 212
 213                 if (err != LDAP_SUCCESS) {
 214                         err = ldap_back_map_result(err);
 215                         send_ldap_result( conn, op, err,
 216                                 NULL, "ldap_init failed", NULL, NULL );
 217                         return( NULL );
 218                 }
 219                 /* Set LDAP version. This will always succeed: If the client
 220                  * bound with a particular version, then so can we.
 221                  */
 222                 ldap_set_option(ld, LDAP_OPT_PROTOCOL_VERSION, &vers);
 223
 224                 lc = (struct ldapconn *)ch_malloc(sizeof(struct ldapconn));
 225                 lc->conn = conn;
 226                 lc->ld = ld;
 227
 228 #ifdef ENABLE_REWRITE
 229                 /*
 230                  * Sets a cookie for the rewrite session
 231                  */
 232                 ( void )rewrite_session_init( li->rwinfo, conn );
 233 #endif /* ENABLE_REWRITE */
 234
 235                 if ( lc->conn->c_cdn != NULL && lc->conn->c_cdn[0] != '\0' ) {
 236
 237                         /*
 238                          * Rewrite the bind dn if needed
 239                          */
 240 #ifdef ENABLE_REWRITE
 241                         lc->bound_dn = NULL;
 242                         switch ( rewrite_session( li->rwinfo, "bindDn",
 243                                                 lc->conn->c_cdn, conn,
 244                                                 &lc->bound_dn ) ) {
 245                         case REWRITE_REGEXEC_OK:
 246                                 if ( lc->bound_dn == NULL ) {
 247                                         lc->bound_dn =
 248                                                 ch_strdup( lc->conn->c_cdn );
 249                                 }
 250 #ifdef NEW_LOGGING
 251                                 LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 252                                                 "[rw] bindDn: \"%s\" ->"
 253                                                 " \"%s\"\n%s",
 254                                                 lc->conn->c_cdn,
 255                                                 lc->bound_dn ));
 256 #else /* !NEW_LOGGING */
 257                                 Debug( LDAP_DEBUG_ARGS,
 258                                                 "rw> bindDn: \"%s\" ->"
 259                                                 " \"%s\"\n%s",
 260                                                 lc->conn->c_cdn,
 261                                                 lc->bound_dn, "" );
 262 #endif /* !NEW_LOGGING */
 263                                 break;
 264
 265                         case REWRITE_REGEXEC_UNWILLING:
 266                                 send_ldap_result( conn, op,
 267                                                 LDAP_UNWILLING_TO_PERFORM,
 268                                                 NULL, "Unwilling to perform",
 269                                                 NULL, NULL );
 270                                 return( NULL );
 271
 272                         case REWRITE_REGEXEC_ERR:
 273                                 send_ldap_result( conn, op,
 274                                                 LDAP_OPERATIONS_ERROR,
 275                                                 NULL, "Operations error",
 276                                                 NULL, NULL );
 277                                 return( NULL );
 278                         }
 279 #else /* !ENABLE_REWRITE */
 280                         lc->bound_dn = ldap_back_dn_massage( li,
 281                                         ch_strdup( lc->conn->c_cdn ), 0 );
 282 #endif /* !ENABLE_REWRITE */
 283                 } else {
 284                         lc->bound_dn = NULL;
 285                 }
 286                 lc->bound = 0;
 287
 288                 /* Inserts the newly created ldapconn in the avl tree */
 289                 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
 290                 err = avl_insert( &li->conntree, (caddr_t)lc,
 291                         ldap_back_conn_cmp, ldap_back_conn_dup );
 292
 293 #if PRINT_CONNTREE > 0
 294                 myprint( li->conntree );
 295 #endif /* PRINT_CONNTREE */
 296
 297                 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
 298
 299 #ifdef NEW_LOGGING
 300                 LDAP_LOG(( "backend", LDAP_LEVEL_INFO,
 301                                 "ldap_back_getconn: conn %ld inserted\n",
 302                                 lc->conn->c_connid ));
 303 #else /* !NEW_LOGGING */
 304                 Debug( LDAP_DEBUG_TRACE,
 305                         "=>ldap_back_getconn: conn %ld inserted\n%s%s",
 306                         lc->conn->c_connid, "", "" );
 307 #endif /* !NEW_LOGGING */
 308
 309                 /* Err could be -1 in case a duplicate ldapconn is inserted */
 310                 if ( err != 0 ) {
 311                         send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR,
 312                         NULL, "internal server error", NULL, NULL );
 313                         /* better destroy the ldapconn struct? */
 314                         return( NULL );
 315                 }
 316         } else {
 317 #ifdef NEW_LOGGING
 318                 LDAP_LOG(( "backend", LDAP_LEVEL_INFO,
 319                                 "ldap_back_getconn: conn %ld inserted\n",
 320                                 lc->conn->c_connid ));
 321 #else /* !NEW_LOGGING */
 322                 Debug( LDAP_DEBUG_TRACE,
 323                         "=>ldap_back_getconn: conn %ld fetched%s%s\n",
 324                         lc->conn->c_connid, "", "" );
 325 #endif /* !NEW_LOGGING */
 326         }
 327
 328         return( lc );
 329 }
 330
 331 /*
 332  * ldap_back_dobind
 333  *
 334  * Note: as the check for the value of lc->bound was already here, I removed
 335  * it from all the callers, and I made the function return the flag, so
 336  * it can be used to simplify the check.
 337  */
 338 int
 339 ldap_back_dobind(struct ldapconn *lc, Operation *op)
 340 {
 341         if (lc->bound) {
 342                 return( lc->bound );
 343         }
 344
 345         if (ldap_bind_s(lc->ld, lc->bound_dn, NULL, LDAP_AUTH_SIMPLE) !=
 346                 LDAP_SUCCESS) {
 347                 ldap_back_op_result(lc, op);
 348                 return( 0 );
 349         } /* else */
 350         return( lc->bound = 1 );
 351 }
 352
 353 /* Map API errors to protocol errors... */
 354
 355 int
 356 ldap_back_map_result(int err)
 357 {
 358         switch(err)
 359         {
 360         case LDAP_SERVER_DOWN:
 361                 return LDAP_UNAVAILABLE;
 362         case LDAP_LOCAL_ERROR:
 363                 return LDAP_OPERATIONS_ERROR;
 364         case LDAP_ENCODING_ERROR:
 365         case LDAP_DECODING_ERROR:
 366                 return LDAP_PROTOCOL_ERROR;
 367         case LDAP_TIMEOUT:
 368                 return LDAP_UNAVAILABLE;
 369         case LDAP_AUTH_UNKNOWN:
 370                 return LDAP_AUTH_METHOD_NOT_SUPPORTED;
 371         case LDAP_FILTER_ERROR:
 372                 return LDAP_OPERATIONS_ERROR;
 373         case LDAP_USER_CANCELLED:
 374                 return LDAP_OPERATIONS_ERROR;
 375         case LDAP_PARAM_ERROR:
 376                 return LDAP_PROTOCOL_ERROR;
 377         case LDAP_NO_MEMORY:
 378                 return LDAP_OPERATIONS_ERROR;
 379         case LDAP_CONNECT_ERROR:
 380                 return LDAP_UNAVAILABLE;
 381         case LDAP_NOT_SUPPORTED:
 382                 return LDAP_UNWILLING_TO_PERFORM;
 383         case LDAP_CONTROL_NOT_FOUND:
 384                 return LDAP_PROTOCOL_ERROR;
 385         case LDAP_NO_RESULTS_RETURNED:
 386                 return LDAP_NO_SUCH_OBJECT;
 387         case LDAP_MORE_RESULTS_TO_RETURN:
 388                 return LDAP_OTHER;
 389         case LDAP_CLIENT_LOOP:
 390         case LDAP_REFERRAL_LIMIT_EXCEEDED:
 391                 return LDAP_LOOP_DETECT;
 392         default:
 393                 if LDAP_API_ERROR(err)
 394                         return LDAP_OTHER;
 395                 else
 396                         return err;
 397         }
 398 }
 399
 400 int
 401 ldap_back_op_result(struct ldapconn *lc, Operation *op)
 402 {
 403         int err = LDAP_SUCCESS;
 404         char *msg = NULL;
 405         char *match = NULL;
 406
 407         ldap_get_option(lc->ld, LDAP_OPT_ERROR_NUMBER, &err);
 408         ldap_get_option(lc->ld, LDAP_OPT_ERROR_STRING, &msg);
 409         ldap_get_option(lc->ld, LDAP_OPT_MATCHED_DN, &match);
 410         err = ldap_back_map_result(err);
 411
 412 #ifdef ENABLE_REWRITE
 413
 414         /*
 415          * need rewrite info; mmmh ...
 416          */
 417
 418 #else /* !ENABLE_REWRITE */
 419
 420         send_ldap_result( lc->conn, op, err, match, msg, NULL, NULL );
 421         /* better test the pointers before freeing? */
 422         if ( match ) {
 423                 free( match );
 424         }
 425 #endif /* !ENABLE_REWRITE */
 426
 427         if ( msg ) free( msg );
 428         return( (err==LDAP_SUCCESS) ? 0 : -1 );
 429 }
 430