git.sur5r.net Git - openldap/blob - servers/slapd/back-bdb2/bind.c

   1 /* bind.c - bdb2 backend bind and unbind routines */
   2
   3 #include "portable.h"
   4
   5 #include <stdio.h>
   6
   7 #include <ac/krb.h>
   8 #include <ac/socket.h>
   9 #include <ac/string.h>
  10 #include <ac/unistd.h>
  11
  12 #include "slap.h"
  13 #include "back-bdb2.h"
  14 #include "proto-back-bdb2.h"
  15
  16 #include <lutil.h>
  17
  18 #ifdef HAVE_KERBEROS
  19 extern int      bdb2i_krbv4_ldap_auth();
  20 #endif
  21
  22 static int
  23 crypted_value_find(
  24         struct berval       **vals,
  25         struct berval       *v,
  26         int                 syntax,
  27         int                 normalize,
  28         struct berval           *cred
  29 )
  30 {
  31         int     i;
  32         for ( i = 0; vals[i] != NULL; i++ ) {
  33                 if ( syntax != SYNTAX_BIN ) {
  34                         int result;
  35
  36 #ifdef SLAPD_CRYPT
  37                         ldap_pvt_thread_mutex_lock( &crypt_mutex );
  38 #endif
  39
  40                         result = lutil_passwd(
  41                                 (char*) cred->bv_val,
  42                                 (char*) vals[i]->bv_val);
  43
  44 #ifdef SLAPD_CRYPT
  45                         ldap_pvt_thread_mutex_unlock( &crypt_mutex );
  46 #endif
  47
  48                         return result;
  49
  50                 } else {
  51                 if ( value_cmp( vals[i], v, syntax, normalize ) == 0 ) {
  52                         return( 0 );
  53                 }
  54         }
  55         }
  56
  57         return( 1 );
  58 }
  59
  60 static int
  61 bdb2i_back_bind_internal(
  62     BackendDB           *be,
  63     Connection          *conn,
  64     Operation           *op,
  65     char                *dn,
  66     int                 method,
  67     struct berval       *cred,
  68         char**  edn
  69 )
  70 {
  71         struct ldbminfo *li = (struct ldbminfo *) be->be_private;
  72         Entry           *e;
  73         Attribute       *a;
  74         int             rc;
  75         char            *matched;
  76 #ifdef HAVE_KERBEROS
  77         char            krbname[MAX_K_NAME_SZ + 1];
  78         AUTH_DAT        ad;
  79 #endif
  80
  81         Debug(LDAP_DEBUG_ARGS, "==> bdb2_back_bind: dn: %s\n", dn, 0, 0);
  82
  83         *edn = NULL;
  84
  85         /* get entry with reader lock */
  86         if ( (e = bdb2i_dn2entry_r( be, dn, &matched )) == NULL ) {
  87                 /* allow noauth binds */
  88                 if ( method == LDAP_AUTH_SIMPLE && cred->bv_len == 0 ) {
  89                         /*
  90                          * bind successful, but return 1 so we don't
  91                          * authorize based on noauth credentials
  92                          */
  93                         send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL );
  94                         rc = 1;
  95                 } else if ( be_isroot_pw( be, dn, cred ) ) {
  96                         /* front end will send result */
  97                         *edn = ch_strdup( be_root_dn( be ) );
  98                         rc = 0;
  99                 } else {
 100                         send_ldap_result( conn, op, LDAP_NO_SUCH_OBJECT, matched, NULL );
 101                         rc = 1;
 102                 }
 103                 if ( matched != NULL ) {
 104                         free( matched );
 105                 }
 106                 return( rc );
 107         }
 108
 109         *edn = ch_strdup( e->e_dn );
 110
 111         /* check for deleted */
 112
 113         switch ( method ) {
 114         case LDAP_AUTH_SIMPLE:
 115                 if ( cred->bv_len == 0 ) {
 116                         send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL );
 117
 118                         /* stop front end from sending result */
 119                         rc = 1;
 120                         goto return_results;
 121                 }
 122
 123                 if ( be_isroot_pw( be, dn, cred ) ) {
 124                         /* front end will send result */
 125                         if( *edn != NULL ) free( *edn );
 126                         *edn = ch_strdup( be_root_dn( be ) );
 127                         rc = 0;
 128                         goto return_results;
 129                 }
 130
 131                 if ( (a = attr_find( e->e_attrs, "userpassword" )) == NULL ) {
 132                         send_ldap_result( conn, op, LDAP_INAPPROPRIATE_AUTH,
 133                             NULL, NULL );
 134                         rc = 1;
 135                         goto return_results;
 136                 }
 137
 138                 if ( crypted_value_find( a->a_vals, cred, a->a_syntax, 0, cred ) != 0 )
 139                 {
 140                         send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
 141                                 NULL, NULL );
 142                         rc = 1;
 143                         goto return_results;
 144                 }
 145                 rc = 0;
 146                 break;
 147
 148 #ifdef HAVE_KERBEROS
 149         case LDAP_AUTH_KRBV41:
 150                 if ( bdb2i_krbv4_ldap_auth( be, cred, &ad ) != LDAP_SUCCESS ) {
 151                         send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
 152                             NULL, NULL );
 153                         rc = 0;
 154                         goto return_results;
 155                 }
 156                 sprintf( krbname, "%s%s%s@%s", ad.pname, *ad.pinst ? "."
 157                     : "", ad.pinst, ad.prealm );
 158                 if ( (a = attr_find( e->e_attrs, "krbname" )) == NULL ) {
 159                         /*
 160                          * no krbName values present:  check against DN
 161                          */
 162                         if ( strcasecmp( dn, krbname ) == 0 ) {
 163                                 rc = 0; /* XXX wild ass guess */
 164                                 break;
 165                         }
 166                         send_ldap_result( conn, op, LDAP_INAPPROPRIATE_AUTH,
 167                             NULL, NULL );
 168                         rc = 1;
 169                         goto return_results;
 170                 } else {        /* look for krbName match */
 171                         struct berval   krbval;
 172
 173                         krbval.bv_val = krbname;
 174                         krbval.bv_len = strlen( krbname );
 175
 176                         if ( value_find( a->a_vals, &krbval, a->a_syntax, 3 ) != 0 ) {
 177                                 send_ldap_result( conn, op,
 178                                     LDAP_INVALID_CREDENTIALS, NULL, NULL );
 179                                 rc = 1;
 180                                 goto return_results;
 181                         }
 182                 }
 183                 rc = 0;
 184                 break;
 185
 186         case LDAP_AUTH_KRBV42:
 187                 send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL );
 188                 /* stop front end from sending result */
 189                 rc = 1;
 190                 goto return_results;
 191 #endif
 192
 193         default:
 194                 send_ldap_result( conn, op, LDAP_STRONG_AUTH_NOT_SUPPORTED,
 195                     NULL, "auth method not supported" );
 196                 rc = 1;
 197                 goto return_results;
 198         }
 199
 200 return_results:;
 201         /* free entry and reader lock */
 202         bdb2i_cache_return_entry_r( &li->li_cache, e );
 203
 204         /* front end with send result on success (rc==0) */
 205         return( rc );
 206 }
 207
 208
 209 int
 210 bdb2_back_bind(
 211     BackendDB           *be,
 212     Connection          *conn,
 213     Operation           *op,
 214     char                *dn,
 215     int                 method,
 216     struct berval       *cred,
 217         char**  edn
 218 )
 219 {
 220         DB_LOCK         lock;
 221         struct ldbminfo *li = (struct ldbminfo *) be->be_private;
 222         struct timeval  time1;
 223         int             ret;
 224
 225         bdb2i_start_timing( be->bd_info, &time1 );
 226
 227         if ( bdb2i_enter_backend_r( get_dbenv( be ), &lock ) != 0 ) {
 228
 229                 send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR, "", "" );
 230                 return( 1 );
 231
 232         }
 233
 234         ret = bdb2i_back_bind_internal( be, conn, op, dn, method, cred, edn );
 235
 236         (void) bdb2i_leave_backend_r( get_dbenv( be ), lock );
 237
 238         bdb2i_stop_timing( be->bd_info, time1, "BIND", conn, op );
 239
 240         return( ret );
 241 }
 242
 243