source4/heimdal/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 static krb5plugin_windc_ftable *windcft;
  37 static void *windcctx;
  38
  39 /*
  40  * Pick the first WINDC module that we find.
  41  */
  42
  43 krb5_error_code
  44 krb5_kdc_windc_init(krb5_context context)
  45 {
  46     struct krb5_plugin *list = NULL, *e;
  47     krb5_error_code ret;
  48
  49     ret = _krb5_plugin_find(context, PLUGIN_TYPE_DATA, "windc", &list);
  50     if(ret != 0 || list == NULL)
  51         return 0;
  52
  53     for (e = list; e != NULL; e = _krb5_plugin_get_next(e)) {
  54
  55         windcft = _krb5_plugin_get_symbol(e);
  56         if (windcft->minor_version < KRB5_WINDC_PLUGIN_MINOR)
  57             continue;
  58
  59         (*windcft->init)(context, &windcctx);
  60         break;
  61     }
  62     _krb5_plugin_free(list);
  63     if (e == NULL) {
  64         krb5_set_error_message(context, ENOENT, "Did not find any WINDC plugin");
  65         windcft = NULL;
  66         return ENOENT;
  67     }
  68
  69     return 0;
  70 }
  71
  72
  73 krb5_error_code
  74 _kdc_pac_generate(krb5_context context,
  75                   hdb_entry_ex *client,
  76                   const krb5_keyblock *pk_reply_key,
  77                   krb5_pac *pac)
  78 {
  79     *pac = NULL;
  80     if (krb5_config_get_bool_default(context, NULL, FALSE, "realms",
  81                                      client->entry.principal->realm,
  82                                      "disable_pac", NULL))
  83         return 0;
  84     if (windcft == NULL) {
  85         return krb5_pac_init(context, pac);
  86     }
  87
  88     if (windcft->pac_pk_generate != NULL && pk_reply_key != NULL)
  89         return (windcft->pac_pk_generate)(windcctx, context,
  90                                           client, pk_reply_key, pac);
  91     return (windcft->pac_generate)(windcctx, context, client, pac);
  92 }
  93
  94 krb5_error_code
  95 _kdc_pac_verify(krb5_context context,
  96                 const krb5_principal client_principal,
  97                 const krb5_principal delegated_proxy_principal,
  98                 hdb_entry_ex *client,
  99                 hdb_entry_ex *server,
 100                 hdb_entry_ex *krbtgt,
 101                 krb5_pac *pac)
 102 {
 103     krb5_error_code ret;
 104
 105     if (windcft == NULL)
 106         return KRB5_PLUGIN_NO_HANDLE;
 107
 108     ret = windcft->pac_verify(windcctx, context,
 109                               client_principal,
 110                               delegated_proxy_principal,
 111                               client, server, krbtgt, pac);
 112     return ret;
 113 }
 114
 115 krb5_error_code
 116 _kdc_check_access(krb5_context context,
 117                   krb5_kdc_configuration *config,
 118                   hdb_entry_ex *client_ex, const char *client_name,
 119                   hdb_entry_ex *server_ex, const char *server_name,
 120                   KDC_REQ *req,
 121                   krb5_data *e_data)
 122 {
 123     if (windcft == NULL)
 124             return kdc_check_flags(context, config,
 125                                    client_ex, client_name,
 126                                    server_ex, server_name,
 127                                    req->msg_type == krb_as_req);
 128
 129     return (windcft->client_access)(windcctx,
 130                                     context, config,
 131                                     client_ex, client_name,
 132                                     server_ex, server_name,
 133                                     req, e_data);
 134 }