lib/45/get_ad_tkt.c

   1 /*
   2  * Copyright (c) 1997 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. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed by Kungliga Tekniska
  20  *      Högskolan and its contributors.
  21  *
  22  * 4. Neither the name of the Institute nor the names of its contributors
  23  *    may be used to endorse or promote products derived from this software
  24  *    without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36  * SUCH DAMAGE.
  37  */
  38
  39 #include "45_locl.h"
  40
  41 RCSID("$Id$");
  42
  43 /* get an additional version 4 ticket via the 524 protocol */
  44
  45 #ifndef NEVERDATE
  46 #define NEVERDATE ((unsigned long)0x7fffffffL)
  47 #endif
  48
  49 int
  50 get_ad_tkt(char *service, char *sinstance, char *realm, int lifetime)
  51 {
  52     krb5_error_code ret;
  53     int code;
  54     krb5_context context;
  55     krb5_ccache id;
  56     krb5_creds in_creds, *out_creds;
  57     CREDENTIALS cred;
  58     time_t now;
  59     char pname[ANAME_SZ], pinst[INST_SZ], prealm[REALM_SZ];
  60
  61     ret = krb5_init_context(&context);
  62     if(ret)
  63         return KFAILURE;
  64     ret = krb5_cc_default(context, &id);
  65     if(ret){
  66         krb5_free_context(context);
  67         return KFAILURE;
  68     }
  69     memset(&in_creds, 0, sizeof(in_creds));
  70     now = time(NULL);
  71     in_creds.times.endtime = krb_life_to_time(time(NULL), lifetime);
  72     if(in_creds.times.endtime == NEVERDATE)
  73         in_creds.times.endtime = 0;
  74     ret = krb5_cc_get_principal(context, id, &in_creds.client);
  75     if(ret){
  76         krb5_cc_close(context, id);
  77         krb5_free_context(context);
  78         return KFAILURE;
  79     }
  80     ret = krb5_524_conv_principal(context, in_creds.client,
  81                                   pname, pinst, prealm);
  82     if(ret){
  83         krb5_free_principal(context, in_creds.client);
  84         krb5_cc_close(context, id);
  85         krb5_free_context(context);
  86         return KFAILURE;
  87     }
  88     ret = krb5_425_conv_principal(context, service, sinstance, realm,
  89                                   &in_creds.server);
  90     if(ret){
  91         krb5_free_principal(context, in_creds.client);
  92         krb5_cc_close(context, id);
  93         krb5_free_context(context);
  94         return KFAILURE;
  95     }
  96     ret = krb5_get_credentials(context,
  97                                0,
  98                                id,
  99                                &in_creds,
 100                                &out_creds);
 101     krb5_cc_close(context, id);
 102     krb5_free_principal(context, in_creds.client);
 103     krb5_free_principal(context, in_creds.server);
 104     if(ret){
 105         krb5_free_context(context);
 106         return KFAILURE;
 107     }
 108     ret = krb524_convert_creds_kdc(context, out_creds, &cred);
 109     krb5_free_context(context);
 110     krb5_free_creds(context, out_creds);
 111     if(ret)
 112         return KFAILURE;
 113     code = save_credentials(cred.service, cred.instance, cred.realm,
 114                             cred.session, cred.lifetime, cred.kvno,
 115                             &cred.ticket_st, now);
 116     if(code == NO_TKT_FIL)
 117         code = tf_setup(&cred, pname, pinst);
 118     memset(&cred.session, 0, sizeof(cred.session));
 119     return code;
 120 }