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                                 NULL );
  44
  45 #ifdef SLAPD_CRYPT
  46                         ldap_pvt_thread_mutex_unlock( &crypt_mutex );
  47 #endif
  48
  49                         return result;
  50
  51                 } else {
  52                 if ( value_cmp( vals[i], v, syntax, normalize ) == 0 ) {
  53                         return( 0 );
  54                 }
  55         }
  56         }
  57
  58         return( 1 );
  59 }
  60
  61 int
  62 ldbm_back_bind(
  63     Backend             *be,
  64     Connection          *conn,
  65     Operation           *op,
  66     char                *dn,
  67     int                 method,
  68         char            *mech,
  69     struct berval       *cred,
  70         char**  edn
  71 )
  72 {
  73         struct ldbminfo *li = (struct ldbminfo *) be->be_private;
  74         Entry           *e;
  75         Attribute       *a;
  76         int             rc;
  77         char            *matched;
  78 #ifdef HAVE_KERBEROS
  79         char            krbname[MAX_K_NAME_SZ + 1];
  80         AUTH_DAT        ad;
  81 #endif
  82
  83         Debug(LDAP_DEBUG_ARGS, "==> ldbm_back_bind: dn: %s\n", dn, 0, 0);
  84
  85         *edn = NULL;
  86
  87         /* get entry with reader lock */
  88         if ( (e = dn2entry_r( be, dn, &matched )) == NULL ) {
  89                 /* allow noauth binds */
  90                 if ( method == LDAP_AUTH_SIMPLE && cred->bv_len == 0 ) {
  91                         /*
  92                          * bind successful, but return 1 so we don't
  93                          * authorize based on noauth credentials
  94                          */
  95                         send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL );
  96                         rc = 1;
  97                 } else if ( be_isroot_pw( be, dn, cred ) ) {
  98                         /* front end will send result */
  99                         *edn = ch_strdup( be_root_dn( be ) );
 100                         rc = 0;
 101                 } else {
 102                         send_ldap_result( conn, op, LDAP_NO_SUCH_OBJECT, matched, NULL );
 103                         rc = 1;
 104                 }
 105                 if ( matched != NULL ) {
 106                         free( matched );
 107                 }
 108                 return( rc );
 109         }
 110
 111         *edn = ch_strdup( e->e_dn );
 112
 113         /* check for deleted */
 114
 115 #ifdef SLAPD_ACLAUTH
 116         if ( ! access_allowed( be, conn, op, e,
 117                 "entry", NULL, ACL_AUTH ) )
 118         {
 119                 send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS, "", "" );
 120                 rc = 1;
 121                 goto return_results;
 122         }
 123 #endif
 124
 125         switch ( method ) {
 126         case LDAP_AUTH_SIMPLE:
 127                 if ( cred->bv_len == 0 ) {
 128                         send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL );
 129
 130                         /* stop front end from sending result */
 131                         rc = 1;
 132                         goto return_results;
 133                 }
 134
 135                 /* check for root dn/passwd */
 136                 if ( be_isroot_pw( be, dn, cred ) ) {
 137                         /* front end will send result */
 138                         if(*edn != NULL) free( *edn );
 139                         *edn = ch_strdup( be_root_dn( be ) );
 140                         rc = 0;
 141                         goto return_results;
 142                 }
 143
 144 #ifdef SLAPD_ACLAUTH
 145                 if ( ! access_allowed( be, conn, op, e,
 146                         "userpassword", NULL, ACL_AUTH ) )
 147                 {
 148                         send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS, "", "" );
 149                         rc = 1;
 150                         goto return_results;
 151                 }
 152 #endif
 153
 154                 if ( (a = attr_find( e->e_attrs, "userpassword" )) == NULL ) {
 155                         send_ldap_result( conn, op, LDAP_INAPPROPRIATE_AUTH,
 156                             NULL, NULL );
 157
 158                         /* stop front end from sending result */
 159                         rc = 1;
 160                         goto return_results;
 161                 }
 162
 163                 if ( crypted_value_find( a->a_vals, cred, a->a_syntax, 0, cred ) != 0 )
 164                 {
 165                         send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
 166                                 NULL, NULL );
 167                         /* stop front end from sending result */
 168                         rc = 1;
 169                         goto return_results;
 170                 }
 171
 172                 rc = 0;
 173                 break;
 174
 175 #ifdef HAVE_KERBEROS
 176         case LDAP_AUTH_KRBV41:
 177 #ifdef SLAPD_ACLAUTH
 178                 if ( ! access_allowed( be, conn, op, e,
 179                         "krbname", NULL, ACL_AUTH ) )
 180                 {
 181                         send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS, "", "" );
 182                         rc = 1;
 183                         goto return_results;
 184                 }
 185 #endif
 186                 if ( krbv4_ldap_auth( be, cred, &ad ) != LDAP_SUCCESS ) {
 187                         send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
 188                             NULL, NULL );
 189                         rc = 0;
 190                         goto return_results;
 191                 }
 192                 sprintf( krbname, "%s%s%s@%s", ad.pname, *ad.pinst ? "."
 193                     : "", ad.pinst, ad.prealm );
 194                 if ( (a = attr_find( e->e_attrs, "krbname" )) == NULL ) {
 195                         /*
 196                          * no krbName values present:  check against DN
 197                          */
 198                         if ( strcasecmp( dn, krbname ) == 0 ) {
 199                                 rc = 0;
 200                                 break;
 201                         }
 202                         send_ldap_result( conn, op, LDAP_INAPPROPRIATE_AUTH,
 203                             NULL, NULL );
 204                         rc = 1;
 205                         goto return_results;
 206
 207                 } else {        /* look for krbName match */
 208                         struct berval   krbval;
 209
 210                         krbval.bv_val = krbname;
 211                         krbval.bv_len = strlen( krbname );
 212
 213                         if ( value_find( a->a_vals, &krbval, a->a_syntax, 3 ) != 0 ) {
 214                                 send_ldap_result( conn, op,
 215                                     LDAP_INVALID_CREDENTIALS, NULL, NULL );
 216                                 rc = 1;
 217                                 goto return_results;
 218                         }
 219                 }
 220                 rc = 0;
 221                 break;
 222
 223         case LDAP_AUTH_KRBV42:
 224                 send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL );
 225                 /* stop front end from sending result */
 226                 rc = 1;
 227                 goto return_results;
 228 #endif
 229
 230         default:
 231                 send_ldap_result( conn, op, LDAP_STRONG_AUTH_NOT_SUPPORTED,
 232                     NULL, "auth method not supported" );
 233                 rc = 1;
 234                 goto return_results;
 235         }
 236
 237 return_results:;
 238         /* free entry and reader lock */
 239         cache_return_entry_r( &li->li_cache, e );
 240
 241         /* front end with send result on success (rc==0) */
 242         return( rc );
 243 }
 244