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 = decode_EncTicketPart (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     free_EncTicketPart(&decr_part);
  79 }
  80
  81 struct getargs args[] = {
  82     { "enctype",        'e', arg_string, &etype_str,
  83       "encryption type to use", "enctype"},
  84     { "version",        0,   arg_flag, &version_flag },
  85     { "help",           0,   arg_flag, &help_flag }
  86 };
  87
  88 static void
  89 usage (int ret)
  90 {
  91     arg_printusage (args,
  92                     sizeof(args)/sizeof(*args),
  93                     NULL,
  94                     "service");
  95     exit (ret);
  96 }
  97
  98 int
  99 main(int argc, char **argv)
 100 {
 101     krb5_error_code ret;
 102     krb5_context context;
 103     krb5_ccache cache;
 104     krb5_creds in, *out;
 105     int optidx = 0;
 106
 107     setprogname (argv[0]);
 108
 109     ret = krb5_init_context (&context);
 110     if (ret)
 111         errx(1, "krb5_init_context failed: %d", ret);
 112
 113     if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
 114         usage(1);
 115
 116     if (help_flag)
 117         usage (0);
 118
 119     if(version_flag) {
 120         print_version(NULL);
 121         exit(0);
 122     }
 123
 124     argc -= optidx;
 125     argv += optidx;
 126
 127     if (argc != 1)
 128         usage (1);
 129
 130     ret = krb5_cc_default(context, &cache);
 131     if (ret)
 132         krb5_err (context, 1, ret, "krb5_cc_default");
 133
 134     memset(&in, 0, sizeof(in));
 135
 136     if (etype_str) {
 137         krb5_enctype enctype;
 138
 139         ret = krb5_string_to_enctype(context, etype_str, &enctype);
 140         if (ret)
 141             krb5_errx (context, 1, "unrecognized enctype: %s", etype_str);
 142         in.session.keytype = enctype;
 143     }
 144
 145     ret = krb5_cc_get_principal(context, cache, &in.client);
 146     if (ret)
 147         krb5_err (context, 1, ret, "krb5_cc_get_principal");
 148
 149     ret = krb5_parse_name(context, argv[0], &in.server);
 150     if (ret)
 151         krb5_err (context, 1, ret, "krb5_parse_name %s", argv[0]);
 152
 153     in.times.endtime = 0;
 154     ret = krb5_get_credentials(context, 0, cache, &in, &out);
 155     if (ret)
 156         krb5_err (context, 1, ret, "krb5_get_credentials");
 157
 158     print_and_decode_tkt (context, &out->ticket, out->server,
 159                           out->session.keytype);
 160
 161     krb5_free_cred_contents(context, out);
 162     return 0;
 163 }