kuser/kdecode_ticket.c

   1 /*
   2  * Copyright (c) 1997 - 2004 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 "kuser_locl.h"
  35
  36 RCSID("$Id$");
  37
  38 static char *etype_str;
  39 static int version_flag;
  40 static int help_flag;
  41
  42 static void
  43 print_and_decode_tkt (krb5_context context,
  44                       krb5_data *ticket,
  45                       krb5_principal server,
  46                       krb5_enctype enctype)
  47 {
  48     krb5_error_code ret;
  49     krb5_crypto crypto;
  50     krb5_data dec_data;
  51     size_t len;
  52     EncTicketPart decr_part;
  53     krb5_keyblock key;
  54     Ticket tkt;
  55
  56     ret = decode_Ticket (ticket->data, ticket->length, &tkt, &len);
  57     if (ret)
  58         krb5_err (context, 1, ret, "decode_Ticket");
  59
  60     ret = krb5_string_to_key (context, enctype, "foo", server, &key);
  61     if (ret)
  62         krb5_err (context, 1, ret, "krb5_string_to_key");
  63
  64     ret = krb5_crypto_init(context, &key, 0, &crypto);
  65     if (ret)
  66         krb5_err (context, 1, ret, "krb5_crypto_init");
  67
  68     ret = krb5_decrypt_EncryptedData (context, crypto, KRB5_KU_TICKET,
  69                                       &tkt.enc_part, &dec_data);
  70     krb5_crypto_destroy (context, crypto);
  71     if (ret)
  72         krb5_err (context, 1, ret, "krb5_decrypt_EncryptedData");
  73     ret = krb5_decode_EncTicketPart (context, dec_data.data, dec_data.length,
  74                                      &decr_part, &len);
  75     krb5_data_free (&dec_data);
  76     if (ret)
  77         krb5_err (context, 1, ret, "krb5_decode_EncTicketPart");
  78 }
  79
  80 struct getargs args[] = {
  81     { "enctype",        'e', arg_string, &etype_str,
  82       "encryption type to use", "enctype"},
  83     { "version",        0,   arg_flag, &version_flag },
  84     { "help",           0,   arg_flag, &help_flag }
  85 };
  86
  87 static void
  88 usage (int ret)
  89 {
  90     arg_printusage (args,
  91                     sizeof(args)/sizeof(*args),
  92                     NULL,
  93                     "service");
  94     exit (ret);
  95 }
  96
  97 int
  98 main(int argc, char **argv)
  99 {
 100     krb5_error_code ret;
 101     krb5_context context;
 102     krb5_ccache cache;
 103     krb5_creds in, *out;
 104     int optidx = 0;
 105
 106     setprogname (argv[0]);
 107
 108     ret = krb5_init_context (&context);
 109     if (ret)
 110         errx(1, "krb5_init_context failed: %d", ret);
 111
 112     if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
 113         usage(1);
 114
 115     if (help_flag)
 116         usage (0);
 117
 118     if(version_flag) {
 119         print_version(NULL);
 120         exit(0);
 121     }
 122
 123     argc -= optidx;
 124     argv += optidx;
 125
 126     if (argc != 1)
 127         usage (1);
 128
 129     ret = krb5_cc_default(context, &cache);
 130     if (ret)
 131         krb5_err (context, 1, ret, "krb5_cc_default");
 132
 133     memset(&in, 0, sizeof(in));
 134
 135     if (etype_str) {
 136         krb5_enctype enctype;
 137
 138         ret = krb5_string_to_enctype(context, etype_str, &enctype);
 139         if (ret)
 140             krb5_errx (context, 1, "unrecognized enctype: %s", etype_str);
 141         in.session.keytype = enctype;
 142     }
 143
 144     ret = krb5_cc_get_principal(context, cache, &in.client);
 145     if (ret)
 146         krb5_err (context, 1, ret, "krb5_cc_get_principal");
 147
 148     ret = krb5_parse_name(context, argv[0], &in.server);
 149     if (ret)
 150         krb5_err (context, 1, ret, "krb5_parse_name %s", argv[0]);
 151
 152     in.times.endtime = 0;
 153     ret = krb5_get_credentials(context, 0, cache, &in, &out);
 154     if (ret)
 155         krb5_err (context, 1, ret, "krb5_get_credentials");
 156
 157     print_and_decode_tkt (context, &out->ticket, out->server,
 158                           out->session.keytype);
 159
 160     krb5_free_cred_contents(context, out);
 161     return 0;
 162 }