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

   1 /* bind.c - ldbm backend bind and unbind routines */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
   5  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   6  */
   7
   8 #include "portable.h"
   9
  10 #include <stdio.h>
  11
  12 #include <ac/krb.h>
  13 #include <ac/socket.h>
  14 #include <ac/string.h>
  15 #include <ac/unistd.h>
  16
  17 #include "slap.h"
  18 #include "back-ldbm.h"
  19 #include "proto-back-ldbm.h"
  20
  21 int
  22 ldbm_back_bind(
  23     Operation           *op,
  24     SlapReply           *rs )
  25 {
  26         struct ldbminfo *li = (struct ldbminfo *) op->o_bd->be_private;
  27         Entry           *e;
  28         Attribute       *a;
  29         int             rc;
  30         Entry           *matched;
  31 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
  32         char            krbname[MAX_K_NAME_SZ + 1];
  33         AttributeDescription *krbattr = slap_schema.si_ad_krbName;
  34         AUTH_DAT        ad;
  35 #endif
  36
  37         AttributeDescription *password = slap_schema.si_ad_userPassword;
  38
  39 #ifdef NEW_LOGGING
  40         LDAP_LOG( BACK_LDBM, ENTRY,
  41                 "ldbm_back_bind: dn: %s.\n", op->o_req_dn.bv_val, 0, 0 );
  42 #else
  43         Debug(LDAP_DEBUG_ARGS, "==> ldbm_back_bind: dn: %s\n", op->o_req_dn.bv_val, 0, 0);
  44 #endif
  45
  46         if ( op->oq_bind.rb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
  47                 ber_dupbv( &op->oq_bind.rb_edn, be_root_dn( op->o_bd ) );
  48                 /* front end will send result */
  49                 return LDAP_SUCCESS;
  50         }
  51
  52         /* grab giant lock for reading */
  53         ldap_pvt_thread_rdwr_rlock(&li->li_giant_rwlock);
  54
  55         /* get entry with reader lock */
  56         if ( (e = dn2entry_r( op->o_bd, &op->o_req_ndn, &matched )) == NULL ) {
  57                 if( matched != NULL ) {
  58                         rs->sr_matched = ch_strdup( matched->e_dn );
  59
  60                         rs->sr_ref = is_entry_referral( matched )
  61                                 ? get_entry_referrals( op, matched )
  62                                 : NULL;
  63
  64                         cache_return_entry_r( &li->li_cache, matched );
  65
  66                 } else {
  67                         rs->sr_ref = referral_rewrite( default_referral,
  68                                 NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
  69                 }
  70
  71                 ldap_pvt_thread_rdwr_runlock(&li->li_giant_rwlock);
  72
  73                 /* allow noauth binds */
  74                 rc = 1;
  75                 if ( rs->sr_ref != NULL ) {
  76                         rs->sr_err = LDAP_REFERRAL;
  77                 } else {
  78                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
  79                 }
  80                 send_ldap_result( op, rs );
  81
  82                 if ( rs->sr_ref ) ber_bvarray_free( rs->sr_ref );
  83                 if ( rs->sr_matched ) free( (char *)rs->sr_matched );
  84 #ifdef LDAP_SYNCREPL
  85                 return rs->sr_err;
  86 #else
  87                 return( rc );
  88 #endif
  89         }
  90
  91         ber_dupbv( &op->oq_bind.rb_edn, &e->e_name );
  92
  93         /* check for deleted */
  94 #ifdef LDBM_SUBENTRIES
  95         if ( is_entry_subentry( e ) ) {
  96                 /* entry is an subentry, don't allow bind */
  97 #ifdef NEW_LOGGING
  98                 LDAP_LOG ( OPERATION, DETAIL1,
  99                                 "bdb_bind: entry is subentry\n", 0, 0, 0 );
 100 #else
 101                 Debug( LDAP_DEBUG_TRACE,
 102                                 "entry is subentry\n", 0, 0, 0 );
 103 #endif
 104                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 105                 send_ldap_result( op, rs );
 106 #ifdef LDAP_SYNCREPL
 107                 rc = LDAP_INVALID_CREDENTIALS;
 108 #else
 109                 rc = 1;
 110 #endif
 111                 goto return_results;
 112         }
 113 #endif
 114
 115         if ( is_entry_alias( e ) ) {
 116                 /* entry is an alias, don't allow bind */
 117 #ifdef NEW_LOGGING
 118                 LDAP_LOG( BACK_LDBM, INFO,
 119                         "ldbm_back_bind: entry (%s) is an alias.\n", e->e_name.bv_val, 0, 0 );
 120 #else
 121                 Debug( LDAP_DEBUG_TRACE, "entry is alias\n", 0,
 122                     0, 0 );
 123 #endif
 124
 125
 126                 send_ldap_error( op, rs, LDAP_ALIAS_PROBLEM,
 127                     "entry is alias" );
 128
 129 #ifdef LDAP_SYNCREPL
 130                 rc = LDAP_ALIAS_PROBLEM;
 131 #else
 132                 rc = 1;
 133 #endif
 134                 goto return_results;
 135         }
 136
 137         if ( is_entry_referral( e ) ) {
 138                 /* entry is a referral, don't allow bind */
 139                 rs->sr_ref = get_entry_referrals( op, e );
 140
 141 #ifdef NEW_LOGGING
 142                 LDAP_LOG( BACK_LDBM, INFO,
 143                            "ldbm_back_bind: entry(%s) is a referral.\n", e->e_dn, 0, 0 );
 144 #else
 145                 Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
 146                     0, 0 );
 147 #endif
 148
 149
 150                 if( rs->sr_ref != NULL ) {
 151                         rs->sr_err = LDAP_REFERRAL;
 152                         rs->sr_matched = e->e_name.bv_val;
 153
 154                 } else {
 155                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 156                 }
 157                 send_ldap_result( op, rs );
 158
 159                 ber_bvarray_free( rs->sr_ref );
 160
 161 #ifdef LDAP_SYNCREPL
 162                 rc = rs->sr_err;
 163 #else
 164                 rc = 1;
 165 #endif
 166                 goto return_results;
 167         }
 168
 169         switch ( op->oq_bind.rb_method ) {
 170         case LDAP_AUTH_SIMPLE:
 171                 if ( ! access_allowed( op, e,
 172                         password, NULL, ACL_AUTH, NULL ) )
 173                 {
 174                         send_ldap_error( op, rs, LDAP_INSUFFICIENT_ACCESS, NULL );
 175 #ifdef LDAP_SYNCREPL
 176                         rc = LDAP_INSUFFICIENT_ACCESS;
 177 #else
 178                         rc = 1;
 179 #endif
 180                         goto return_results;
 181                 }
 182
 183                 if ( (a = attr_find( e->e_attrs, password )) == NULL ) {
 184                         send_ldap_error( op, rs, LDAP_INAPPROPRIATE_AUTH, NULL );
 185
 186                         /* stop front end from sending result */
 187 #ifdef LDAP_SYNCREPL
 188                         rc = LDAP_INAPPROPRIATE_AUTH;
 189 #else
 190                         rc = 1;
 191 #endif
 192                         goto return_results;
 193                 }
 194
 195                 if ( slap_passwd_check( op->o_conn, a, &op->oq_bind.rb_cred, &rs->sr_text ) != 0 ) {
 196                         send_ldap_error( op, rs, LDAP_INVALID_CREDENTIALS, NULL );
 197                         /* stop front end from sending result */
 198 #ifdef LDAP_SYNCREPL
 199                         rc = LDAP_INVALID_CREDENTIALS;
 200 #else
 201                         rc = 1;
 202 #endif
 203                         goto return_results;
 204                 }
 205
 206                 rc = 0;
 207                 break;
 208
 209 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
 210         case LDAP_AUTH_KRBV41:
 211                 if ( krbv4_ldap_auth( op->o_bd, &op->oq_bind.rb_cred, &ad ) != LDAP_SUCCESS ) {
 212                         send_ldap_error( op, rs, LDAP_INVALID_CREDENTIALS, NULL );
 213 #ifdef LDAP_SYNCREPL
 214                         rc = LDAP_INVALID_CREDENTIALS;
 215 #else
 216                         rc = 1;
 217 #endif
 218                         goto return_results;
 219                 }
 220
 221                 if ( ! access_allowed( op, e,
 222                         krbattr, NULL, ACL_AUTH, NULL ) )
 223                 {
 224                         send_ldap_error( op, rs, LDAP_INSUFFICIENT_ACCESS,
 225                                 NULL );
 226 #ifdef LDAP_SYNCREPL
 227                         rc = LDAP_INSUFFICIENT_ACCESS;
 228 #else
 229                         rc = 1;
 230 #endif
 231                         goto return_results;
 232                 }
 233
 234                 sprintf( krbname, "%s%s%s@%s", ad.pname, *ad.pinst ? "."
 235                     : "", ad.pinst, ad.prealm );
 236
 237                 if ( (a = attr_find( e->e_attrs, krbattr )) == NULL ) {
 238                         /*
 239                          * no krbname values present:  check against DN
 240                          */
 241                         if ( strcasecmp( op->o_req_dn.bv_val, krbname ) == 0 ) {
 242                                 rc = 0;
 243                                 break;
 244                         }
 245                         send_ldap_error( op, rs, LDAP_INAPPROPRIATE_AUTH, NULL );
 246 #ifdef LDAP_SYNCREPL
 247                         rc = LDAP_INAPPROPRIATE_AUTH;
 248 #else
 249                         rc = 1;
 250 #endif
 251                         goto return_results;
 252
 253                 } else {        /* look for krbname match */
 254                         struct berval   krbval;
 255
 256                         krbval.bv_val = krbname;
 257                         krbval.bv_len = strlen( krbname );
 258
 259                         if ( value_find( a->a_desc, a->a_vals, &krbval ) != 0 ) {
 260                                 send_ldap_error( op, rs,
 261                                     LDAP_INVALID_CREDENTIALS, NULL );
 262 #ifdef LDAP_SYNCREPL
 263                                 rc = LDAP_INVALID_CREDENTIALS;
 264 #else
 265                                 rc = 1;
 266 #endif
 267                                 goto return_results;
 268                         }
 269                 }
 270                 rc = 0;
 271                 break;
 272
 273         case LDAP_AUTH_KRBV42:
 274                 send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
 275                         "Kerberos bind step 2 not supported" );
 276                 /* stop front end from sending result */
 277                 rc = LDAP_UNWILLING_TO_PERFORM;
 278                 goto return_results;
 279 #endif
 280
 281         default:
 282                 send_ldap_error( op, rs, LDAP_STRONG_AUTH_NOT_SUPPORTED,
 283                     "authentication method not supported" );
 284 #ifdef LDAP_SYNCREPL
 285                 rc = LDAP_STRONG_AUTH_NOT_SUPPORTED;
 286 #else
 287                 rc = 1;
 288 #endif
 289                 goto return_results;
 290         }
 291
 292 return_results:;
 293         /* free entry and reader lock */
 294         cache_return_entry_r( &li->li_cache, e );
 295         ldap_pvt_thread_rdwr_runlock(&li->li_giant_rwlock);
 296
 297         /* front end will send result on success (rc==0) */
 298         return( rc );
 299 }
 300