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