source3/libsmb/clikrb5.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 3.0
   4    simple kerberos5 routines for active directory
   5    Copyright (C) Andrew Tridgell 2001
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 #include "includes.h"
  23
  24 #if HAVE_KRB5
  25 /*
  26   we can't use krb5_mk_req because w2k wants the service to be in a particular format
  27 */
  28 static krb5_error_code krb5_mk_req2(krb5_context context,
  29                                     krb5_auth_context *auth_context,
  30                                     const krb5_flags ap_req_options,
  31                                     const char *principal,
  32                                     krb5_ccache ccache,
  33                                     krb5_data *outbuf)
  34 {
  35         krb5_error_code           retval;
  36         krb5_principal    server;
  37         krb5_creds              * credsp;
  38         krb5_creds                creds;
  39         krb5_data in_data;
  40
  41         retval = krb5_parse_name(context, principal, &server);
  42         if (retval) {
  43                 DEBUG(1,("Failed to parse principal %s\n", principal));
  44                 return retval;
  45         }
  46
  47         /* obtain ticket & session key */
  48         memset((char *)&creds, 0, sizeof(creds));
  49         if ((retval = krb5_copy_principal(context, server, &creds.server))) {
  50                 DEBUG(1,("krb5_copy_principal failed (%s)\n",
  51                          error_message(retval)));
  52                 goto cleanup_princ;
  53         }
  54
  55         if ((retval = krb5_cc_get_principal(context, ccache, &creds.client))) {
  56                 DEBUG(1,("krb5_cc_get_principal failed (%s)\n",
  57                          error_message(retval)));
  58                 goto cleanup_creds;
  59         }
  60
  61         if ((retval = krb5_get_credentials(context, 0,
  62                                            ccache, &creds, &credsp))) {
  63                 DEBUG(1,("krb5_get_credentials failed (%s)\n",
  64                          error_message(retval)));
  65                 goto cleanup_creds;
  66         }
  67
  68         in_data.length = 0;
  69         retval = krb5_mk_req_extended(context, auth_context, ap_req_options,
  70                                       &in_data, credsp, outbuf);
  71         if (retval) {
  72                 DEBUG(1,("krb5_mk_req_extended failed (%s)\n",
  73                          error_message(retval)));
  74         }
  75
  76         krb5_free_creds(context, credsp);
  77
  78 cleanup_creds:
  79         krb5_free_cred_contents(context, &creds);
  80
  81 cleanup_princ:
  82         krb5_free_principal(context, server);
  83
  84         return retval;
  85 }
  86
  87 /*
  88   get a kerberos5 ticket for the given service
  89 */
  90 DATA_BLOB krb5_get_ticket(char *principal)
  91 {
  92         krb5_error_code retval;
  93         krb5_data packet;
  94         krb5_ccache ccdef;
  95         krb5_context context;
  96         krb5_auth_context auth_context = NULL;
  97         DATA_BLOB ret;
  98
  99         retval = krb5_init_context(&context);
 100         if (retval) {
 101                 DEBUG(1,("krb5_init_context failed (%s)\n",
 102                          error_message(retval)));
 103                 goto failed;
 104         }
 105
 106         if ((retval = krb5_cc_default(context, &ccdef))) {
 107                 DEBUG(1,("krb5_cc_default failed (%s)\n",
 108                          error_message(retval)));
 109                 goto failed;
 110         }
 111
 112         if ((retval = krb5_mk_req2(context,
 113                                    &auth_context,
 114                                    0,
 115                                    principal,
 116                                    ccdef, &packet))) {
 117                 goto failed;
 118         }
 119
 120         ret = data_blob(packet.data, packet.length);
 121 /* Hmm, heimdal dooesn't have this - what's the correct call? */
 122 /*      krb5_free_data_contents(context, &packet); */
 123         krb5_free_context(context);
 124         return ret;
 125
 126 failed:
 127         krb5_free_context(context);
 128         return data_blob(NULL, 0);
 129 }
 130
 131
 132 #else /* HAVE_KRB5 */
 133  /* this saves a few linking headaches */
 134  DATA_BLOB krb5_get_ticket(char *principal)
 135  {
 136          DEBUG(0,("NO KERBEROS SUPPORT\n"));
 137          return data_blob(NULL, 0);
 138  }
 139 #endif