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 #include <lutil.h>
  22
  23 #ifdef HAVE_KERBEROS
  24 extern int      krbv4_ldap_auth();
  25 #endif
  26
  27 static int
  28 crypted_value_find(
  29         struct berval       **vals,
  30         struct berval       *v,
  31         int                 syntax,
  32         int                 normalize,
  33         struct berval           *cred
  34 )
  35 {
  36         int     i;
  37         for ( i = 0; vals[i] != NULL; i++ ) {
  38                 if ( syntax != SYNTAX_BIN ) {
  39                         int result;
  40
  41 #ifdef SLAPD_CRYPT
  42                         ldap_pvt_thread_mutex_lock( &crypt_mutex );
  43 #endif
  44
  45                         result = lutil_passwd(
  46                                 (char*) cred->bv_val,
  47                                 (char*) vals[i]->bv_val,
  48                                 NULL );
  49
  50 #ifdef SLAPD_CRYPT
  51                         ldap_pvt_thread_mutex_unlock( &crypt_mutex );
  52 #endif
  53
  54                         return result;
  55
  56                 } else {
  57                 if ( value_cmp( vals[i], v, syntax, normalize ) == 0 ) {
  58                         return( 0 );
  59                 }
  60         }
  61         }
  62
  63         return( 1 );
  64 }
  65
  66 int
  67 ldbm_back_bind(
  68     Backend             *be,
  69     Connection          *conn,
  70     Operation           *op,
  71     char                *dn,
  72     int                 method,
  73         char            *mech,
  74     struct berval       *cred,
  75         char**  edn
  76 )
  77 {
  78         struct ldbminfo *li = (struct ldbminfo *) be->be_private;
  79         Entry           *e;
  80         Attribute       *a;
  81         int             rc;
  82         Entry           *matched;
  83 #ifdef HAVE_KERBEROS
  84         char            krbname[MAX_K_NAME_SZ + 1];
  85         AUTH_DAT        ad;
  86 #endif
  87
  88         Debug(LDAP_DEBUG_ARGS, "==> ldbm_back_bind: dn: %s\n", dn, 0, 0);
  89
  90         *edn = NULL;
  91
  92         /* get entry with reader lock */
  93         if ( (e = dn2entry_r( be, dn, &matched )) == NULL ) {
  94                 char *matched_dn = NULL;
  95                 struct berval **refs = NULL;
  96
  97                 if( matched != NULL ) {
  98                         matched_dn = ch_strdup( matched->e_dn );
  99
 100                         refs = is_entry_referral( matched )
 101                                 ? get_entry_referrals( be, conn, op, matched )
 102                                 : NULL;
 103
 104                         cache_return_entry_r( &li->li_cache, matched );
 105                 } else {
 106                         refs = default_referral;
 107                 }
 108
 109                 /* allow noauth binds */
 110                 rc = 1;
 111                 if ( method == LDAP_AUTH_SIMPLE ) {
 112                         if( cred->bv_len == 0 ) {
 113                                 /* SUCCESS */
 114                                 send_ldap_result( conn, op, LDAP_SUCCESS,
 115                                         NULL, NULL, NULL, NULL );
 116
 117                         } else if ( be_isroot_pw( be, dn, cred ) ) {
 118                                 *edn = ch_strdup( be_root_dn( be ) );
 119                                 rc = 0; /* front end will send result */
 120
 121                         } else {
 122                                 send_ldap_result( conn, op, LDAP_REFERRAL,
 123                                         matched_dn, NULL, refs, NULL );
 124                         }
 125
 126                 } else if ( method == LDAP_AUTH_SASL ) {
 127                         if( mech != NULL && strcasecmp(mech,"DIGEST-MD5") == 0 ) {
 128                                 /* insert DIGEST calls here */
 129                                 send_ldap_result( conn, op, LDAP_AUTH_METHOD_NOT_SUPPORTED,
 130                                         NULL, NULL, NULL, NULL );
 131
 132                         } else {
 133                                 send_ldap_result( conn, op, LDAP_AUTH_METHOD_NOT_SUPPORTED,
 134                                         NULL, NULL, NULL, NULL );
 135                         }
 136
 137                 } else {
 138                         send_ldap_result( conn, op, LDAP_REFERRAL,
 139                                 matched_dn, NULL, refs, NULL );
 140                 }
 141
 142                 if ( matched != NULL ) {
 143                         ber_bvecfree( refs );
 144                         free( matched_dn );
 145                 }
 146                 return( rc );
 147         }
 148
 149         *edn = ch_strdup( e->e_dn );
 150
 151         /* check for deleted */
 152
 153         if ( ! access_allowed( be, conn, op, e,
 154                 "entry", NULL, ACL_AUTH ) )
 155         {
 156                 send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
 157                         NULL, NULL, NULL, NULL );
 158                 rc = 1;
 159                 goto return_results;
 160         }
 161
 162         if ( is_entry_alias( e ) ) {
 163                 /* entry is an alias, don't allow bind */
 164                 Debug( LDAP_DEBUG_TRACE, "entry is alias\n", 0,
 165                     0, 0 );
 166
 167                 send_ldap_result( conn, op, LDAP_ALIAS_PROBLEM,
 168                     NULL, NULL, NULL, NULL );
 169
 170                 rc = 1;
 171                 goto return_results;
 172         }
 173
 174         if ( is_entry_referral( e ) ) {
 175                 /* entry is a referral, don't allow bind */
 176                 struct berval **refs = get_entry_referrals( be,
 177                         conn, op, e );
 178
 179                 Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
 180                     0, 0 );
 181
 182                 send_ldap_result( conn, op, LDAP_REFERRAL,
 183                     e->e_dn, NULL, refs, NULL );
 184
 185                 ber_bvecfree( refs );
 186
 187                 rc = 1;
 188                 goto return_results;
 189         }
 190
 191         switch ( method ) {
 192         case LDAP_AUTH_SIMPLE:
 193                 if ( cred->bv_len == 0 ) {
 194                         send_ldap_result( conn, op, LDAP_SUCCESS,
 195                                 NULL, NULL, NULL, NULL );
 196
 197                         /* stop front end from sending result */
 198                         rc = 1;
 199                         goto return_results;
 200                 }
 201
 202                 /* check for root dn/passwd */
 203                 if ( be_isroot_pw( be, dn, cred ) ) {
 204                         /* front end will send result */
 205                         if(*edn != NULL) free( *edn );
 206                         *edn = ch_strdup( be_root_dn( be ) );
 207                         rc = 0;
 208                         goto return_results;
 209                 }
 210
 211                 if ( ! access_allowed( be, conn, op, e,
 212                         "userpassword", NULL, ACL_AUTH ) )
 213                 {
 214                         send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
 215                                 NULL, NULL, NULL, NULL );
 216                         rc = 1;
 217                         goto return_results;
 218                 }
 219
 220                 if ( (a = attr_find( e->e_attrs, "userpassword" )) == NULL ) {
 221                         send_ldap_result( conn, op, LDAP_INAPPROPRIATE_AUTH,
 222                             NULL, NULL, NULL, NULL );
 223
 224                         /* stop front end from sending result */
 225                         rc = 1;
 226                         goto return_results;
 227                 }
 228
 229                 if ( crypted_value_find( a->a_vals, cred, a->a_syntax, 0, cred ) != 0 )
 230                 {
 231                         send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
 232                                 NULL, NULL, NULL, NULL );
 233                         /* stop front end from sending result */
 234                         rc = 1;
 235                         goto return_results;
 236                 }
 237
 238                 rc = 0;
 239                 break;
 240
 241 #ifdef HAVE_KERBEROS
 242         case LDAP_AUTH_KRBV41:
 243                 if ( ! access_allowed( be, conn, op, e,
 244                         "krbname", NULL, ACL_AUTH ) )
 245                 {
 246                         send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
 247                                 NULL, NULL, NULL, NULL );
 248                         rc = 1;
 249                         goto return_results;
 250                 }
 251
 252                 if ( krbv4_ldap_auth( be, cred, &ad ) != LDAP_SUCCESS ) {
 253                         send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
 254                             NULL, NULL, NULL, NULL );
 255                         rc = 1;
 256                         goto return_results;
 257                 }
 258
 259                 if ( ! access_allowed( be, conn, op, e,
 260                         "krbname", NULL, ACL_AUTH ) )
 261                 {
 262                         send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
 263                                 NULL, NULL, NULL, NULL );
 264                         rc = 1;
 265                         goto return_results;
 266                 }
 267
 268                 sprintf( krbname, "%s%s%s@%s", ad.pname, *ad.pinst ? "."
 269                     : "", ad.pinst, ad.prealm );
 270
 271
 272                 if ( (a = attr_find( e->e_attrs, "krbname" )) == NULL ) {
 273                         /*
 274                          * no krbName values present:  check against DN
 275                          */
 276                         if ( strcasecmp( dn, krbname ) == 0 ) {
 277                                 rc = 0;
 278                                 break;
 279                         }
 280                         send_ldap_result( conn, op, LDAP_INAPPROPRIATE_AUTH,
 281                             NULL, NULL, NULL, NULL );
 282                         rc = 1;
 283                         goto return_results;
 284
 285                 } else {        /* look for krbName match */
 286                         struct berval   krbval;
 287
 288                         krbval.bv_val = krbname;
 289                         krbval.bv_len = strlen( krbname );
 290
 291                         if ( value_find( a->a_vals, &krbval, a->a_syntax, 3 ) != 0 ) {
 292                                 send_ldap_result( conn, op,
 293                                     LDAP_INVALID_CREDENTIALS,
 294                                         NULL, NULL, NULL, NULL );
 295                                 rc = 1;
 296                                 goto return_results;
 297                         }
 298                 }
 299                 rc = 0;
 300                 break;
 301
 302         case LDAP_AUTH_KRBV42:
 303                 send_ldap_result( conn, op, LDAP_SUCCESS,
 304                         NULL, NULL, NULL, NULL );
 305                 /* stop front end from sending result */
 306                 rc = 1;
 307                 goto return_results;
 308 #endif
 309
 310         case LDAP_AUTH_SASL:
 311                 /* insert SASL code here */
 312
 313         default:
 314                 send_ldap_result( conn, op, LDAP_STRONG_AUTH_NOT_SUPPORTED,
 315                     NULL, "auth method not supported", NULL, NULL );
 316                 rc = 1;
 317                 goto return_results;
 318         }
 319
 320 return_results:;
 321         /* free entry and reader lock */
 322         cache_return_entry_r( &li->li_cache, e );
 323
 324         /* front end with send result on success (rc==0) */
 325         return( rc );
 326 }
 327