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 1998-1999 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     Backend             *be,
  24     Connection          *conn,
  25     Operation           *op,
  26     char                *dn,
  27     char                *ndn,
  28     int                 method,
  29         char            *mech,
  30     struct berval       *cred,
  31         char**  edn
  32 )
  33 {
  34         struct ldbminfo *li = (struct ldbminfo *) be->be_private;
  35         Entry           *e;
  36         Attribute       *a;
  37         int             rc;
  38         Entry           *matched;
  39 #ifdef HAVE_KERBEROS
  40         char            krbname[MAX_K_NAME_SZ + 1];
  41         AUTH_DAT        ad;
  42 #endif
  43
  44         Debug(LDAP_DEBUG_ARGS, "==> ldbm_back_bind: dn: %s\n", dn, 0, 0);
  45
  46         *edn = NULL;
  47         dn = ndn;
  48
  49         /* get entry with reader lock */
  50         if ( (e = dn2entry_r( be, dn, &matched )) == NULL ) {
  51                 char *matched_dn = NULL;
  52                 struct berval **refs = NULL;
  53
  54                 if( matched != NULL ) {
  55                         matched_dn = ch_strdup( matched->e_dn );
  56
  57                         refs = is_entry_referral( matched )
  58                                 ? get_entry_referrals( be, conn, op, matched )
  59                                 : NULL;
  60
  61                         cache_return_entry_r( &li->li_cache, matched );
  62                 } else {
  63                         refs = default_referral;
  64                 }
  65
  66                 /* allow noauth binds */
  67                 rc = 1;
  68                 if ( method == LDAP_AUTH_SIMPLE ) {
  69                         if( cred->bv_len == 0 ) {
  70                                 /* SUCCESS */
  71                                 send_ldap_result( conn, op, LDAP_SUCCESS,
  72                                         NULL, NULL, NULL, NULL );
  73
  74                         } else if ( be_isroot_pw( be, dn, cred ) ) {
  75                                 *edn = ch_strdup( be_root_dn( be ) );
  76                                 rc = 0; /* front end will send result */
  77
  78                         } else if ( refs != NULL ) {
  79                                 send_ldap_result( conn, op, LDAP_REFERRAL,
  80                                         matched_dn, NULL, refs, NULL );
  81
  82                         } else {
  83                                 send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
  84                                         NULL, NULL, NULL, NULL );
  85                         }
  86
  87                 } else if ( method == LDAP_AUTH_SASL ) {
  88                         if( mech != NULL && strcasecmp(mech,"DIGEST-MD5") == 0 ) {
  89                                 /* insert DIGEST calls here */
  90                                 send_ldap_result( conn, op, LDAP_AUTH_METHOD_NOT_SUPPORTED,
  91                                         NULL, NULL, NULL, NULL );
  92
  93                         } else {
  94                                 send_ldap_result( conn, op, LDAP_AUTH_METHOD_NOT_SUPPORTED,
  95                                         NULL, NULL, NULL, NULL );
  96                         }
  97
  98                 } else if ( refs != NULL ) {
  99                         send_ldap_result( conn, op, LDAP_REFERRAL,
 100                                 matched_dn, NULL, refs, NULL );
 101
 102                 } else {
 103                         send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
 104                                 NULL, NULL, NULL, NULL );
 105                 }
 106
 107                 if ( matched != NULL ) {
 108                         ber_bvecfree( refs );
 109                         free( matched_dn );
 110                 }
 111                 return( rc );
 112         }
 113
 114         *edn = ch_strdup( e->e_dn );
 115
 116         /* check for deleted */
 117
 118         if ( ! access_allowed( be, conn, op, e,
 119                 "entry", NULL, ACL_AUTH ) )
 120         {
 121                 send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
 122                         NULL, NULL, NULL, NULL );
 123                 rc = 1;
 124                 goto return_results;
 125         }
 126
 127         if ( is_entry_alias( e ) ) {
 128                 /* entry is an alias, don't allow bind */
 129                 Debug( LDAP_DEBUG_TRACE, "entry is alias\n", 0,
 130                     0, 0 );
 131
 132                 send_ldap_result( conn, op, LDAP_ALIAS_PROBLEM,
 133                     NULL, NULL, NULL, NULL );
 134
 135                 rc = 1;
 136                 goto return_results;
 137         }
 138
 139         if ( is_entry_referral( e ) ) {
 140                 /* entry is a referral, don't allow bind */
 141                 struct berval **refs = get_entry_referrals( be,
 142                         conn, op, e );
 143
 144                 Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
 145                     0, 0 );
 146
 147                 if( refs != NULL ) {
 148                         send_ldap_result( conn, op, LDAP_REFERRAL,
 149                                 e->e_dn, NULL, refs, NULL );
 150
 151                 } else {
 152                         send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
 153                                 NULL, NULL, NULL, NULL );
 154                 }
 155
 156                 ber_bvecfree( refs );
 157
 158                 rc = 1;
 159                 goto return_results;
 160         }
 161
 162         switch ( method ) {
 163         case LDAP_AUTH_SIMPLE:
 164                 if ( cred->bv_len == 0 ) {
 165                         send_ldap_result( conn, op, LDAP_SUCCESS,
 166                                 NULL, NULL, NULL, NULL );
 167
 168                         /* stop front end from sending result */
 169                         rc = 1;
 170                         goto return_results;
 171                 }
 172
 173                 /* check for root dn/passwd */
 174                 if ( be_isroot_pw( be, dn, cred ) ) {
 175                         /* front end will send result */
 176                         if(*edn != NULL) free( *edn );
 177                         *edn = ch_strdup( be_root_dn( be ) );
 178                         rc = 0;
 179                         goto return_results;
 180                 }
 181
 182                 if ( ! access_allowed( be, conn, op, e,
 183                         "userpassword", NULL, ACL_AUTH ) )
 184                 {
 185                         send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
 186                                 NULL, NULL, NULL, NULL );
 187                         rc = 1;
 188                         goto return_results;
 189                 }
 190
 191                 if ( (a = attr_find( e->e_attrs, "userpassword" )) == NULL ) {
 192                         send_ldap_result( conn, op, LDAP_INAPPROPRIATE_AUTH,
 193                             NULL, NULL, NULL, NULL );
 194
 195                         /* stop front end from sending result */
 196                         rc = 1;
 197                         goto return_results;
 198                 }
 199
 200                 if ( slap_passwd_check( a, cred ) != 0 ) {
 201                         send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
 202                                 NULL, NULL, NULL, NULL );
 203                         /* stop front end from sending result */
 204                         rc = 1;
 205                         goto return_results;
 206                 }
 207
 208                 rc = 0;
 209                 break;
 210
 211 #ifdef HAVE_KERBEROS
 212         case LDAP_AUTH_KRBV41:
 213                 if ( ! access_allowed( be, conn, op, e,
 214                         "krbname", NULL, ACL_AUTH ) )
 215                 {
 216                         send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
 217                                 NULL, NULL, NULL, NULL );
 218                         rc = 1;
 219                         goto return_results;
 220                 }
 221
 222                 if ( krbv4_ldap_auth( be, cred, &ad ) != LDAP_SUCCESS ) {
 223                         send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
 224                             NULL, NULL, NULL, NULL );
 225                         rc = 1;
 226                         goto return_results;
 227                 }
 228
 229                 if ( ! access_allowed( be, conn, op, e,
 230                         "krbname", NULL, ACL_AUTH ) )
 231                 {
 232                         send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
 233                                 NULL, NULL, NULL, NULL );
 234                         rc = 1;
 235                         goto return_results;
 236                 }
 237
 238                 sprintf( krbname, "%s%s%s@%s", ad.pname, *ad.pinst ? "."
 239                     : "", ad.pinst, ad.prealm );
 240
 241
 242                 if ( (a = attr_find( e->e_attrs, "krbname" )) == NULL ) {
 243                         /*
 244                          * no krbName values present:  check against DN
 245                          */
 246                         if ( strcasecmp( dn, krbname ) == 0 ) {
 247                                 rc = 0;
 248                                 break;
 249                         }
 250                         send_ldap_result( conn, op, LDAP_INAPPROPRIATE_AUTH,
 251                             NULL, NULL, NULL, NULL );
 252                         rc = 1;
 253                         goto return_results;
 254
 255                 } else {        /* look for krbName match */
 256                         struct berval   krbval;
 257
 258                         krbval.bv_val = krbname;
 259                         krbval.bv_len = strlen( krbname );
 260
 261                         if ( value_find( a->a_vals, &krbval, a->a_syntax, 3 ) != 0 ) {
 262                                 send_ldap_result( conn, op,
 263                                     LDAP_INVALID_CREDENTIALS,
 264                                         NULL, NULL, NULL, NULL );
 265                                 rc = 1;
 266                                 goto return_results;
 267                         }
 268                 }
 269                 rc = 0;
 270                 break;
 271
 272         case LDAP_AUTH_KRBV42:
 273                 send_ldap_result( conn, op, LDAP_SUCCESS,
 274                         NULL, NULL, NULL, NULL );
 275                 /* stop front end from sending result */
 276                 rc = 1;
 277                 goto return_results;
 278 #endif
 279
 280         case LDAP_AUTH_SASL:
 281                 /* insert SASL code here */
 282
 283         default:
 284                 send_ldap_result( conn, op, LDAP_STRONG_AUTH_NOT_SUPPORTED,
 285                     NULL, "auth method not supported", NULL, NULL );
 286                 rc = 1;
 287                 goto return_results;
 288         }
 289
 290 return_results:;
 291         /* free entry and reader lock */
 292         cache_return_entry_r( &li->li_cache, e );
 293
 294         /* front end with send result on success (rc==0) */
 295         return( rc );
 296 }
 297