kcm/renew.c

   1 /*
   2  * Copyright (c) 2005, PADL Software Pty Ltd.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  *
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * 3. Neither the name of PADL Software nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY PADL SOFTWARE AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL PADL SOFTWARE OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 #include "kcm_locl.h"
  34
  35 RCSID("$Id$");
  36
  37 krb5_error_code
  38 kcm_ccache_refresh(krb5_context context,
  39                    kcm_ccache ccache,
  40                    krb5_creds **credp)
  41 {
  42     krb5_error_code ret;
  43     krb5_creds in, *out;
  44     krb5_kdc_flags flags;
  45     krb5_const_realm realm;
  46     krb5_ccache_data ccdata;
  47     const char *estr;
  48
  49     memset(&in, 0, sizeof(in));
  50
  51     KCM_ASSERT_VALID(ccache);
  52
  53     if (ccache->client == NULL) {
  54         /* no primary principal */
  55         kcm_log(0, "Refresh credentials requested but no client principal");
  56         return KRB5_CC_NOTFOUND;
  57     }
  58
  59     HEIMDAL_MUTEX_lock(&ccache->mutex);
  60
  61     /* Fake up an internal ccache */
  62     kcm_internal_ccache(context, ccache, &ccdata);
  63
  64     /* Find principal */
  65     in.client = ccache->client;
  66
  67     if (ccache->server != NULL) {
  68         ret = krb5_copy_principal(context, ccache->server, &in.server);
  69         if (ret) {
  70             estr = krb5_get_error_message(context, ret);
  71             kcm_log(0, "Failed to copy service principal: %s",
  72                     estr);
  73             krb5_free_error_message(context, estr);
  74             goto out;
  75         }
  76     } else {
  77         realm = krb5_principal_get_realm(context, in.client);
  78         ret = krb5_make_principal(context, &in.server, realm,
  79                                   KRB5_TGS_NAME, realm, NULL);
  80         if (ret) {
  81             estr = krb5_get_error_message(context, ret);
  82             kcm_log(0, "Failed to make TGS principal for realm %s: %s",
  83                     realm, estr);
  84             krb5_free_error_message(context, estr);
  85             goto out;
  86         }
  87     }
  88
  89     if (ccache->tkt_life)
  90         in.times.endtime = time(NULL) + ccache->tkt_life;
  91     if (ccache->renew_life)
  92         in.times.renew_till = time(NULL) + ccache->renew_life;
  93
  94     flags.i = 0;
  95     flags.b.renewable = TRUE;
  96     flags.b.renew = TRUE;
  97
  98     ret = krb5_get_kdc_cred(context,
  99                             &ccdata,
 100                             flags,
 101                             NULL,
 102                             NULL,
 103                             &in,
 104                             &out);
 105     if (ret) {
 106         estr = krb5_get_error_message(context, ret);
 107         kcm_log(0, "Failed to renew credentials for cache %s: %s",
 108                 ccache->name, estr);
 109         krb5_free_error_message(context, estr);
 110         goto out;
 111     }
 112
 113     /* Swap them in */
 114     kcm_ccache_remove_creds_internal(context, ccache);
 115
 116     ret = kcm_ccache_store_cred_internal(context, ccache, out, 0, credp);
 117     if (ret) {
 118         estr = krb5_get_error_message(context, ret);
 119         kcm_log(0, "Failed to store credentials for cache %s: %s",
 120                 ccache->name, estr);
 121         krb5_free_error_message(context, estr);
 122         krb5_free_creds(context, out);
 123         goto out;
 124     }
 125
 126     free(out); /* but not contents */
 127
 128 out:
 129     HEIMDAL_MUTEX_unlock(&ccache->mutex);
 130
 131     return ret;
 132 }
 133