git.sur5r.net Git - openldap/blob - servers/slapd/overlays/rwmdn.c

   1 /* rwmdn.c - massages dns */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1999-2004 The OpenLDAP Foundation.
   6  * Portions Copyright 1999-2003 Howard Chu.
   7  * Portions Copyright 2000-2003 Pierangelo Masarati.
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted only as authorized by the OpenLDAP
  12  * Public License.
  13  *
  14  * A copy of this license is available in the file LICENSE in the
  15  * top-level directory of the distribution or, alternatively, at
  16  * <http://www.OpenLDAP.org/license.html>.
  17  */
  18 /* ACKNOWLEDGEMENTS:
  19  * This work was initially developed by the Howard Chu for inclusion
  20  * in OpenLDAP Software and subsequently enhanced by Pierangelo
  21  * Masarati.
  22  */
  23
  24
  25 #include "portable.h"
  26
  27 #ifdef SLAPD_OVER_RWM
  28
  29 #include <stdio.h>
  30
  31 #include <ac/string.h>
  32 #include <ac/socket.h>
  33
  34 #include "slap.h"
  35 #include "rwm.h"
  36
  37 /* FIXME: after rewriting, we should also remap attributes ...  */
  38
  39 #ifdef ENABLE_REWRITE
  40 int
  41 rwm_dn_massage(
  42         dncookie *dc,
  43         struct berval *in,
  44         struct berval *dn,
  45         struct berval *ndn
  46 )
  47 {
  48         int             rc = 0;
  49         struct berval   mdn;
  50
  51         assert( in );
  52
  53         if ( dn == NULL && ndn == NULL ) {
  54                 return LDAP_OTHER;
  55         }
  56
  57         rc = rewrite_session( dc->rwmap->rwm_rw, dc->ctx,
  58                         ( in->bv_len ? in->bv_val : "" ),
  59                         dc->conn, &mdn.bv_val );
  60         switch ( rc ) {
  61         case REWRITE_REGEXEC_OK:
  62                 if ( !BER_BVISNULL( &mdn ) ) {
  63
  64                         mdn.bv_len = strlen( mdn.bv_val );
  65
  66                         if ( dn != NULL && ndn != NULL ) {
  67                                 rc = dnPrettyNormal( NULL, &mdn, dn, ndn, NULL );
  68
  69                         } else if ( dn != NULL ) {
  70                                 rc = dnPretty( NULL, &mdn, dn, NULL );
  71
  72                         } else if ( ndn != NULL) {
  73                                 rc = dnNormalize( 0, NULL, NULL, &mdn, ndn, NULL );
  74                         }
  75
  76                         if ( mdn.bv_val != in->bv_val ) {
  77                                 ch_free( mdn.bv_val );
  78                         }
  79
  80                 } else {
  81                         /* we assume the input string is already in pretty form,
  82                          * and that the normalized version is already available */
  83                         if ( dn ) {
  84                                 *dn = *in;
  85                                 if ( ndn ) {
  86                                         BER_BVZERO( ndn );
  87                                 }
  88                         } else {
  89                                 *ndn = *in;
  90                         }
  91                         rc = LDAP_SUCCESS;
  92                 }
  93
  94                 Debug( LDAP_DEBUG_ARGS,
  95                         "[rw] %s: \"%s\" -> \"%s\"\n",
  96                         dc->ctx, in->bv_val, dn ? dn->bv_val : ndn->bv_val );
  97                 break;
  98
  99         case REWRITE_REGEXEC_UNWILLING:
 100                 if ( dc->rs ) {
 101                         dc->rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 102                         dc->rs->sr_text = "Operation not allowed";
 103                 }
 104                 rc = LDAP_UNWILLING_TO_PERFORM;
 105                 break;
 106
 107         case REWRITE_REGEXEC_ERR:
 108                 if ( dc->rs ) {
 109                         dc->rs->sr_err = LDAP_OTHER;
 110                         dc->rs->sr_text = "Rewrite error";
 111                 }
 112                 rc = LDAP_OTHER;
 113                 break;
 114         }
 115
 116         return rc;
 117 }
 118
 119 #else /* ! ENABLE_REWRITE */
 120 /*
 121  * rwm_dn_massage
 122  *
 123  * Aliases the suffix; based on suffix_alias (servers/slapd/suffixalias.c).
 124  */
 125 int
 126 rwm_dn_massage(
 127         dncookie *dc,
 128         struct berval *tmpin,
 129         struct berval *dn,
 130         struct berval *ndn
 131 )
 132 {
 133         int             i, src, dst;
 134         struct berval   pretty = BER_BVNULL,
 135                         normal = BER_BVNULL,
 136                         *in = tmpin;
 137
 138         if ( dn == NULL && ndn == NULL ) {
 139                 return LDAP_OTHER;
 140         }
 141
 142         if ( in == NULL || BER_BVISNULL( in ) ) {
 143                 if ( dn ) {
 144                         BER_BVZERO( dn );
 145                 }
 146                 if ( ndn ) {
 147                         BER_BVZERO( ndn );
 148                 }
 149                 return LDAP_SUCCESS;
 150         }
 151
 152         if ( dc->rwmap == NULL || dc->rwmap->rwm_suffix_massage == NULL ) {
 153                 if ( dn ) {
 154                         *dn = *in;
 155                         if ( ndn ) {
 156                                 BER_BVZERO( ndn );
 157                         }
 158                 } else {
 159                         *ndn = *in;
 160                 }
 161                 return LDAP_SUCCESS;
 162         }
 163
 164         if ( dc->tofrom ) {
 165                 src = 0 + dc->normalized;
 166                 dst = 2 + dc->normalized;
 167
 168         } else {
 169                 int     rc;
 170
 171                 src = 2 + dc->normalized;
 172                 dst = 0 + dc->normalized;
 173
 174                 /* DN from remote server may be in arbitrary form.
 175                  * Pretty it so we can parse reliably.
 176                  */
 177                 if ( dc->normalized && dn == NULL ) {
 178                         rc = dnNormalize( 0, NULL, NULL, in, &normal, NULL );
 179
 180                 } else if ( !dc->normalized && ndn == NULL ) {
 181                         rc = dnPretty( NULL, in, &pretty, NULL );
 182
 183                 } else {
 184                         rc = dnPrettyNormal( NULL, in, &pretty, &normal, NULL );
 185                 }
 186
 187                 if ( rc != LDAP_SUCCESS ) {
 188                         return rc;
 189                 }
 190
 191                 if ( dc->normalized && !BER_BVISNULL( &normal ) ) {
 192                         in = &normal;
 193
 194                 } else if ( !dc->normalized && !BER_BVISNULL( &pretty ) ) {
 195                         in = &pretty;
 196                 }
 197         }
 198
 199         for ( i = 0;
 200                 dc->rwmap->rwm_suffix_massage[i].bv_val != NULL;
 201                 i += 4 ) {
 202                 int aliasLength = dc->rwmap->rwm_suffix_massage[i+src].bv_len;
 203                 int diff = in->bv_len - aliasLength;
 204
 205                 if ( diff < 0 ) {
 206                         /* alias is longer than dn */
 207                         continue;
 208
 209                 } else if ( diff > 0 && ( !DN_SEPARATOR(in->bv_val[diff-1]))) {
 210                         /* FIXME: DN_SEPARATOR() is intended to work
 211                          * on a normalized/pretty DN, so that ';'
 212                          * is never used as a DN separator */
 213                         continue;
 214                         /* At a DN Separator */
 215                 }
 216
 217                 if ( !strcmp( dc->rwmap->rwm_suffix_massage[i+src].bv_val, &in->bv_val[diff] ) ) {
 218                         struct berval   *out;
 219
 220                         if ( dn ) {
 221                                 out = dn;
 222                         } else {
 223                                 out = ndn;
 224                         }
 225                         out->bv_len = diff + dc->rwmap->rwm_suffix_massage[i+dst].bv_len;
 226                         out->bv_val = ch_malloc( out->bv_len + 1 );
 227                         strncpy( out->bv_val, in->bv_val, diff );
 228                         strcpy( &out->bv_val[diff], dc->rwmap->rwm_suffix_massage[i+dst].bv_val );
 229                         Debug( LDAP_DEBUG_ARGS,
 230                                 "rwm_dn_massage:"
 231                                 " converted \"%s\" to \"%s\"\n",
 232                                 in->bv_val, out->bv_val, 0 );
 233                         if ( dn && ndn ) {
 234                                 rc = dnNormalize( 0, NULL, NULL, dn, ndn, NULL );
 235                         }
 236
 237                         break;
 238                 }
 239         }
 240
 241         if ( !BER_BVISNULL( &pretty ) ) {
 242                 ch_free( pretty.bv_val );
 243         }
 244
 245         if ( !BER_BVISNULL( &normal ) ) {
 246                 ch_free( normal.bv_val );
 247         }
 248
 249         in = tmpin;
 250
 251         /* Nothing matched, just return the original DN */
 252         if ( dc->normalized && BER_BVISNULL( ndn ) ) {
 253                 *ndn = *in;
 254
 255         } else if ( !dc->normalized && BER_BVISNULL( dn ) ) {
 256                 *dn = *in;
 257         }
 258
 259         return LDAP_SUCCESS;
 260 }
 261 #endif /* ! ENABLE_REWRITE */
 262
 263 #endif /* SLAPD_OVER_RWM */