kdc/windc.c

   1 /*
   2  * Copyright (c) 2007 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include "kdc_locl.h"
  35
  36 RCSID("$Id$");
  37
  38 static krb5plugin_windc_ftable *windcft;
  39 static void *windcctx;
  40
  41 /*
  42  * Pick the first WINDC module that we find.
  43  */
  44
  45 krb5_error_code
  46 krb5_kdc_windc_init(krb5_context context)
  47 {
  48     struct krb5_plugin *list = NULL, *e;
  49     krb5_error_code ret;
  50
  51     ret = _krb5_plugin_find(context, PLUGIN_TYPE_DATA, "windc", &list);
  52     if(ret != 0 || list == NULL)
  53         return 0;
  54
  55     for (e = list; e != NULL; e = _krb5_plugin_get_next(e)) {
  56
  57         windcft = _krb5_plugin_get_symbol(e);
  58         if (windcft->minor_version < KRB5_WINDC_PLUGING_MINOR)
  59             continue;
  60
  61         (*windcft->init)(context, &windcctx);
  62         break;
  63     }
  64     if (e == NULL) {
  65         _krb5_plugin_free(list);
  66         krb5_set_error_message(context, ENOENT, "Did not find any WINDC plugin");
  67         windcft = NULL;
  68         return ENOENT;
  69     }
  70
  71     return 0;
  72 }
  73
  74
  75 krb5_error_code
  76 _kdc_pac_generate(krb5_context context,
  77                   hdb_entry_ex *client,
  78                   krb5_pac *pac)
  79 {
  80     *pac = NULL;
  81     if (windcft == NULL)
  82         return 0;
  83     return (windcft->pac_generate)(windcctx, context, client, pac);
  84 }
  85
  86 krb5_error_code
  87 _kdc_pac_verify(krb5_context context,
  88                 const krb5_principal client_principal,
  89                 hdb_entry_ex *client,
  90                 hdb_entry_ex *server,
  91                 krb5_pac *pac)
  92 {
  93     if (windcft == NULL) {
  94         krb5_set_error_message(context, EINVAL, "Can't verify PAC, no function");
  95         return EINVAL;
  96     }
  97     return (windcft->pac_verify)(windcctx, context,
  98                                  client_principal, client, server, pac);
  99 }
 100
 101 krb5_error_code
 102 _kdc_check_access(krb5_context context,
 103                   krb5_kdc_configuration *config,
 104                   hdb_entry_ex *client_ex, const char *client_name,
 105                   hdb_entry_ex *server_ex, const char *server_name,
 106                   KDC_REQ *req,
 107                   krb5_data *e_data)
 108 {
 109     if (windcft == NULL)
 110             return kdc_check_flags(context, config,
 111                                    client_ex, client_name,
 112                                    server_ex, server_name,
 113                                    req->msg_type == krb_as_req);
 114
 115     return (windcft->client_access)(windcctx,
 116                                     context, config,
 117                                     client_ex, client_name,
 118                                     server_ex, server_name,
 119                                     req, e_data);
 120 }