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

   1 /* bind.c - ldbm 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-ldbm.h"
  14 #include "proto-back-ldbm.h"
  15
  16 #include <lutil.h>
  17
  18 #ifdef HAVE_KERBEROS
  19 extern int      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 int
  61 ldbm_back_bind(
  62     Backend             *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, "==> ldbm_back_bind: dn: %s\n", dn, 0, 0);
  82
  83         *edn = NULL;
  84
  85         /* get entry with reader lock */
  86         if ( (e = 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                 /* check for root dn/passwd */
 124                 if ( be_isroot_pw( be, dn, cred ) ) {
 125                         /* front end will send result */
 126                         if(*edn != NULL) free( *edn );
 127                         *edn = ch_strdup( be_root_dn( be ) );
 128                         rc = 0;
 129                         goto return_results;
 130                 }
 131
 132                 if ( (a = attr_find( e->e_attrs, "userpassword" )) == NULL ) {
 133                         send_ldap_result( conn, op, LDAP_INAPPROPRIATE_AUTH,
 134                             NULL, NULL );
 135
 136                         /* stop front end from sending result */
 137                         rc = 1;
 138                         goto return_results;
 139                 }
 140
 141                 if ( crypted_value_find( a->a_vals, cred, a->a_syntax, 0, cred ) != 0 )
 142                 {
 143                         send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
 144                                 NULL, NULL );
 145                         /* stop front end from sending result */
 146                         rc = 1;
 147                         goto return_results;
 148                 }
 149
 150                 rc = 0;
 151                 break;
 152
 153 #ifdef HAVE_KERBEROS
 154         case LDAP_AUTH_KRBV41:
 155                 if ( krbv4_ldap_auth( be, cred, &ad ) != LDAP_SUCCESS ) {
 156                         send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
 157                             NULL, NULL );
 158                         rc = 0;
 159                         goto return_results;
 160                 }
 161                 sprintf( krbname, "%s%s%s@%s", ad.pname, *ad.pinst ? "."
 162                     : "", ad.pinst, ad.prealm );
 163                 if ( (a = attr_find( e->e_attrs, "krbname" )) == NULL ) {
 164                         /*
 165                          * no krbName values present:  check against DN
 166                          */
 167                         if ( strcasecmp( dn, krbname ) == 0 ) {
 168                                 rc = 0; /* XXX wild ass guess */
 169                                 break;
 170                         }
 171                         send_ldap_result( conn, op, LDAP_INAPPROPRIATE_AUTH,
 172                             NULL, NULL );
 173                         rc = 1;
 174                         goto return_results;
 175
 176                 } else {        /* look for krbName match */
 177                         struct berval   krbval;
 178
 179                         krbval.bv_val = krbname;
 180                         krbval.bv_len = strlen( krbname );
 181
 182                         if ( value_find( a->a_vals, &krbval, a->a_syntax, 3 ) != 0 ) {
 183                                 send_ldap_result( conn, op,
 184                                     LDAP_INVALID_CREDENTIALS, NULL, NULL );
 185                                 rc = 1;
 186                                 goto return_results;
 187                         }
 188                 }
 189                 rc = 0;
 190                 break;
 191
 192         case LDAP_AUTH_KRBV42:
 193                 send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL );
 194                 /* stop front end from sending result */
 195                 rc = 1;
 196                 goto return_results;
 197 #endif
 198
 199         default:
 200                 send_ldap_result( conn, op, LDAP_STRONG_AUTH_NOT_SUPPORTED,
 201                     NULL, "auth method not supported" );
 202                 rc = 1;
 203                 goto return_results;
 204         }
 205
 206 return_results:;
 207         /* free entry and reader lock */
 208         cache_return_entry_r( &li->li_cache, e );
 209
 210         /* front end with send result on success (rc==0) */
 211         return( rc );
 212 }
 213