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

   1 /* bind.c - ldap backend bind function */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-2002 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     struct berval       *dn,
  58     struct berval       *ndn,
  59     int                 method,
  60     struct berval       *cred,
  61     struct berval       *edn
  62 )
  63 {
  64         struct ldapinfo *li = (struct ldapinfo *) be->be_private;
  65         struct ldapconn *lc;
  66
  67         struct berval mdn = { 0, NULL };
  68         int rc = 0;
  69
  70         lc = ldap_back_getconn(li, conn, op);
  71         if ( !lc ) {
  72                 return( -1 );
  73         }
  74
  75         /*
  76          * Rewrite the bind dn if needed
  77          */
  78 #ifdef ENABLE_REWRITE
  79         switch ( rewrite_session( li->rwinfo, "bindDn", dn->bv_val, conn, &mdn.bv_val ) ) {
  80         case REWRITE_REGEXEC_OK:
  81                 if ( mdn.bv_val == NULL ) {
  82                         mdn.bv_val = ( char * )dn->bv_val;
  83                 }
  84 #ifdef NEW_LOGGING
  85                 LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
  86                                 "[rw] bindDn: \"%s\" -> \"%s\"\n", dn->bv_val, mdn.bv_val ));
  87 #else /* !NEW_LOGGING */
  88                 Debug( LDAP_DEBUG_ARGS, "rw> bindDn: \"%s\" -> \"%s\"\n%s",
  89                                 dn->bv_val, mdn.bv_val, "" );
  90 #endif /* !NEW_LOGGING */
  91                 break;
  92
  93         case REWRITE_REGEXEC_UNWILLING:
  94                 send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
  95                                 NULL, "Unwilling to perform", NULL, NULL );
  96                 return( -1 );
  97
  98         case REWRITE_REGEXEC_ERR:
  99                 send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR,
 100                                 NULL, "Operations error", NULL, NULL );
 101                 return( -1 );
 102         }
 103 #else /* !ENABLE_REWRITE */
 104         ldap_back_dn_massage( li, dn, &mdn, 0, 1 );
 105 #endif /* !ENABLE_REWRITE */
 106
 107         rc = ldap_bind_s(lc->ld, mdn.bv_val, cred->bv_val, method);
 108         if (rc != LDAP_SUCCESS) {
 109                 rc = ldap_back_op_result( lc, op );
 110         } else {
 111                 lc->bound = 1;
 112         }
 113
 114         if ( mdn.bv_val != dn->bv_val ) {
 115                 free( mdn.bv_val );
 116         }
 117
 118         return( rc );
 119 }
 120
 121 /*
 122  * ldap_back_conn_cmp
 123  *
 124  * compares two struct ldapconn based on the value of the conn pointer;
 125  * used by avl stuff
 126  */
 127 int
 128 ldap_back_conn_cmp(
 129         const void *c1,
 130         const void *c2
 131         )
 132 {
 133         const struct ldapconn *lc1 = (const struct ldapconn *)c1;
 134         const struct ldapconn *lc2 = (const struct ldapconn *)c2;
 135
 136         return ( ( lc1->conn < lc2->conn ) ? -1 : ( ( lc1->conn > lc2-> conn ) ? 1 : 0 ) );
 137 }
 138
 139 /*
 140  * ldap_back_conn_dup
 141  *
 142  * returns -1 in case a duplicate struct ldapconn has been inserted;
 143  * used by avl stuff
 144  */
 145 int
 146 ldap_back_conn_dup(
 147         void *c1,
 148         void *c2
 149         )
 150 {
 151         struct ldapconn *lc1 = (struct ldapconn *)c1;
 152         struct ldapconn *lc2 = (struct ldapconn *)c2;
 153
 154         return( ( lc1->conn == lc2->conn ) ? -1 : 0 );
 155 }
 156
 157 #if PRINT_CONNTREE > 0
 158 static void ravl_print( Avlnode *root, int depth )
 159 {
 160         int     i;
 161
 162         if ( root == 0 )
 163                 return;
 164
 165         ravl_print( root->avl_right, depth+1 );
 166
 167         for ( i = 0; i < depth; i++ )
 168                 printf( "   " );
 169
 170         printf( "c(%ld) %d\n", ((struct ldapconn *) root->avl_data)->conn->c_connid, root->avl_bf );
 171
 172         ravl_print( root->avl_left, depth+1 );
 173 }
 174
 175 static void myprint( Avlnode *root )
 176 {
 177         printf( "********\n" );
 178
 179         if ( root == 0 )
 180                 printf( "\tNULL\n" );
 181
 182         else
 183                 ravl_print( root, 0 );
 184
 185         printf( "********\n" );
 186 }
 187 #endif /* PRINT_CONNTREE */
 188
 189 struct ldapconn *
 190 ldap_back_getconn(struct ldapinfo *li, Connection *conn, Operation *op)
 191 {
 192         struct ldapconn *lc, lc_curr;
 193         LDAP *ld;
 194
 195         /* Searches for a ldapconn in the avl tree */
 196         lc_curr.conn = conn;
 197         ldap_pvt_thread_mutex_lock( &li->conn_mutex );
 198         lc = (struct ldapconn *)avl_find( li->conntree,
 199                 (caddr_t)&lc_curr, ldap_back_conn_cmp );
 200         ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
 201
 202         /* Looks like we didn't get a bind. Open a new session... */
 203         if (!lc) {
 204                 int vers = conn->c_protocol;
 205                 int err = ldap_initialize(&ld, li->url);
 206
 207                 if (err != LDAP_SUCCESS) {
 208                         err = ldap_back_map_result(err);
 209                         send_ldap_result( conn, op, err,
 210                                 NULL, "ldap_init failed", NULL, NULL );
 211                         return( NULL );
 212                 }
 213                 /* Set LDAP version. This will always succeed: If the client
 214                  * bound with a particular version, then so can we.
 215                  */
 216                 ldap_set_option(ld, LDAP_OPT_PROTOCOL_VERSION, &vers);
 217
 218                 lc = (struct ldapconn *)ch_malloc(sizeof(struct ldapconn));
 219                 lc->conn = conn;
 220                 lc->ld = ld;
 221
 222 #ifdef ENABLE_REWRITE
 223                 /*
 224                  * Sets a cookie for the rewrite session
 225                  */
 226                 ( void )rewrite_session_init( li->rwinfo, conn );
 227 #endif /* ENABLE_REWRITE */
 228
 229                 if ( lc->conn->c_cdn.bv_len != 0 ) {
 230
 231                         /*
 232                          * Rewrite the bind dn if needed
 233                          */
 234 #ifdef ENABLE_REWRITE
 235                         lc->bound_dn.bv_val = NULL;
 236                         lc->bound_dn.bv_len = 0;
 237                         switch ( rewrite_session( li->rwinfo, "bindDn",
 238                                                 lc->conn->c_cdn.bv_val, conn,
 239                                                 &lc->bound_dn.bv_val ) ) {
 240                         case REWRITE_REGEXEC_OK:
 241                                 if ( lc->bound_dn.bv_val == NULL ) {
 242                                         ber_dupbv( &lc->bound_dn, &lc->conn->c_cdn );
 243                                 }
 244 #ifdef NEW_LOGGING
 245                                 LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 246                                                 "[rw] bindDn: \"%s\" ->"
 247                                                 " \"%s\"\n%s",
 248                                                 lc->conn->c_cdn.bv_val,
 249                                                 lc->bound_dn.bv_val ));
 250 #else /* !NEW_LOGGING */
 251                                 Debug( LDAP_DEBUG_ARGS,
 252                                                 "rw> bindDn: \"%s\" ->"
 253                                                 " \"%s\"\n%s",
 254                                                 lc->conn->c_cdn.bv_val,
 255                                                 lc->bound_dn.bv_val, "" );
 256 #endif /* !NEW_LOGGING */
 257                                 break;
 258
 259                         case REWRITE_REGEXEC_UNWILLING:
 260                                 send_ldap_result( conn, op,
 261                                                 LDAP_UNWILLING_TO_PERFORM,
 262                                                 NULL, "Unwilling to perform",
 263                                                 NULL, NULL );
 264                                 return( NULL );
 265
 266                         case REWRITE_REGEXEC_ERR:
 267                                 send_ldap_result( conn, op,
 268                                                 LDAP_OPERATIONS_ERROR,
 269                                                 NULL, "Operations error",
 270                                                 NULL, NULL );
 271                                 return( NULL );
 272                         }
 273 #else /* !ENABLE_REWRITE */
 274                         struct berval bv;
 275                         ldap_back_dn_massage( li, &lc->conn->c_cdn, &bv, 0, 1 );
 276                         if ( bv.bv_val == lc->conn->c_cdn.bv_val )
 277                                 ber_dupbv( &lc->bound_dn, &bv );
 278                         else
 279                                 lc->bound_dn = bv;
 280 #endif /* !ENABLE_REWRITE */
 281                 } else {
 282                         lc->bound_dn.bv_val = NULL;
 283                         lc->bound_dn.bv_len = 0;
 284                 }
 285                 lc->bound = 0;
 286
 287                 /* Inserts the newly created ldapconn in the avl tree */
 288                 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
 289                 err = avl_insert( &li->conntree, (caddr_t)lc,
 290                         ldap_back_conn_cmp, ldap_back_conn_dup );
 291
 292 #if PRINT_CONNTREE > 0
 293                 myprint( li->conntree );
 294 #endif /* PRINT_CONNTREE */
 295
 296                 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
 297
 298 #ifdef NEW_LOGGING
 299                 LDAP_LOG(( "backend", LDAP_LEVEL_INFO,
 300                                 "ldap_back_getconn: conn %ld inserted\n",
 301                                 lc->conn->c_connid ));
 302 #else /* !NEW_LOGGING */
 303                 Debug( LDAP_DEBUG_TRACE,
 304                         "=>ldap_back_getconn: conn %ld inserted\n%s%s",
 305                         lc->conn->c_connid, "", "" );
 306 #endif /* !NEW_LOGGING */
 307
 308                 /* Err could be -1 in case a duplicate ldapconn is inserted */
 309                 if ( err != 0 ) {
 310                         send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR,
 311                         NULL, "internal server error", NULL, NULL );
 312                         /* better destroy the ldapconn struct? */
 313                         return( NULL );
 314                 }
 315         } else {
 316 #ifdef NEW_LOGGING
 317                 LDAP_LOG(( "backend", LDAP_LEVEL_INFO,
 318                                 "ldap_back_getconn: conn %ld inserted\n",
 319                                 lc->conn->c_connid ));
 320 #else /* !NEW_LOGGING */
 321                 Debug( LDAP_DEBUG_TRACE,
 322                         "=>ldap_back_getconn: conn %ld fetched%s%s\n",
 323                         lc->conn->c_connid, "", "" );
 324 #endif /* !NEW_LOGGING */
 325         }
 326
 327         return( lc );
 328 }
 329
 330 /*
 331  * ldap_back_dobind
 332  *
 333  * Note: as the check for the value of lc->bound was already here, I removed
 334  * it from all the callers, and I made the function return the flag, so
 335  * it can be used to simplify the check.
 336  */
 337 int
 338 ldap_back_dobind(struct ldapconn *lc, Operation *op)
 339 {
 340         if (lc->bound) {
 341                 return( lc->bound );
 342         }
 343
 344         if (ldap_bind_s(lc->ld, lc->bound_dn.bv_val, NULL, LDAP_AUTH_SIMPLE) !=
 345                 LDAP_SUCCESS) {
 346                 ldap_back_op_result(lc, op);
 347                 return( 0 );
 348         } /* else */
 349         return( lc->bound = 1 );
 350 }
 351
 352 /* Map API errors to protocol errors... */
 353
 354 int
 355 ldap_back_map_result(int err)
 356 {
 357         switch(err)
 358         {
 359         case LDAP_SERVER_DOWN:
 360                 return LDAP_UNAVAILABLE;
 361         case LDAP_LOCAL_ERROR:
 362                 return LDAP_OPERATIONS_ERROR;
 363         case LDAP_ENCODING_ERROR:
 364         case LDAP_DECODING_ERROR:
 365                 return LDAP_PROTOCOL_ERROR;
 366         case LDAP_TIMEOUT:
 367                 return LDAP_UNAVAILABLE;
 368         case LDAP_AUTH_UNKNOWN:
 369                 return LDAP_AUTH_METHOD_NOT_SUPPORTED;
 370         case LDAP_FILTER_ERROR:
 371                 return LDAP_OPERATIONS_ERROR;
 372         case LDAP_USER_CANCELLED:
 373                 return LDAP_OPERATIONS_ERROR;
 374         case LDAP_PARAM_ERROR:
 375                 return LDAP_PROTOCOL_ERROR;
 376         case LDAP_NO_MEMORY:
 377                 return LDAP_OPERATIONS_ERROR;
 378         case LDAP_CONNECT_ERROR:
 379                 return LDAP_UNAVAILABLE;
 380         case LDAP_NOT_SUPPORTED:
 381                 return LDAP_UNWILLING_TO_PERFORM;
 382         case LDAP_CONTROL_NOT_FOUND:
 383                 return LDAP_PROTOCOL_ERROR;
 384         case LDAP_NO_RESULTS_RETURNED:
 385                 return LDAP_NO_SUCH_OBJECT;
 386         case LDAP_MORE_RESULTS_TO_RETURN:
 387                 return LDAP_OTHER;
 388         case LDAP_CLIENT_LOOP:
 389         case LDAP_REFERRAL_LIMIT_EXCEEDED:
 390                 return LDAP_LOOP_DETECT;
 391         default:
 392                 if LDAP_API_ERROR(err)
 393                         return LDAP_OTHER;
 394                 else
 395                         return err;
 396         }
 397 }
 398
 399 int
 400 ldap_back_op_result(struct ldapconn *lc, Operation *op)
 401 {
 402         int err = LDAP_SUCCESS;
 403         char *msg = NULL;
 404         char *match = NULL;
 405
 406         ldap_get_option(lc->ld, LDAP_OPT_ERROR_NUMBER, &err);
 407         ldap_get_option(lc->ld, LDAP_OPT_ERROR_STRING, &msg);
 408         ldap_get_option(lc->ld, LDAP_OPT_MATCHED_DN, &match);
 409         err = ldap_back_map_result(err);
 410
 411 #ifdef ENABLE_REWRITE
 412
 413         /*
 414          * FIXME: need rewrite info for match; mmmh ...
 415          */
 416         send_ldap_result( lc->conn, op, err, match, msg, NULL, NULL );
 417         /* better test the pointers before freeing? */
 418         if ( match ) {
 419                 free( match );
 420         }
 421
 422 #else /* !ENABLE_REWRITE */
 423
 424         send_ldap_result( lc->conn, op, err, match, msg, NULL, NULL );
 425         /* better test the pointers before freeing? */
 426         if ( match ) {
 427                 free( match );
 428         }
 429
 430 #endif /* !ENABLE_REWRITE */
 431
 432         if ( msg ) free( msg );
 433         return( (err==LDAP_SUCCESS) ? 0 : -1 );
 434 }
 435