crypto/dist/heimdal/kuser/kgetcred.c

   1 /*
   2  * Copyright (c) 1997 - 2007 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("$Heimdal: kgetcred.c 22276 2007-12-12 02:42:31Z lha $"
  37         "$NetBSD$");
  38
  39 static char *cache_str;
  40 static char *out_cache_str;
  41 static char *delegation_cred_str;
  42 static char *etype_str;
  43 static int transit_flag = 1;
  44 static int forwardable_flag;
  45 static char *impersonate_str;
  46 static char *nametype_str;
  47 static int version_flag;
  48 static int help_flag;
  49
  50 struct getargs args[] = {
  51     { "cache",          'c', arg_string, &cache_str,
  52       "credential cache to use", "cache"},
  53     { "out-cache",      0,   arg_string, &out_cache_str,
  54       "credential cache to store credential in", "cache"},
  55     { "delegation-credential-cache",0,arg_string, &delegation_cred_str,
  56       "where to find the ticket use for delegation", "cache"},
  57     { "forwardable",    0, arg_flag, &forwardable_flag,
  58       "forwardable ticket requested"},
  59     { "transit-check",  0,   arg_negative_flag, &transit_flag },
  60     { "enctype",        'e', arg_string, &etype_str,
  61       "encryption type to use", "enctype"},
  62     { "impersonate",    0,   arg_string, &impersonate_str,
  63       "client to impersonate", "principal"},
  64     { "name-type",              0,   arg_string, &nametype_str },
  65     { "version",        0,   arg_flag, &version_flag },
  66     { "help",           0,   arg_flag, &help_flag }
  67 };
  68
  69 static void
  70 usage (int ret)
  71 {
  72     arg_printusage (args,
  73                     sizeof(args)/sizeof(*args),
  74                     NULL,
  75                     "service");
  76     exit (ret);
  77 }
  78
  79 int
  80 main(int argc, char **argv)
  81 {
  82     krb5_error_code ret;
  83     krb5_context context;
  84     krb5_ccache cache;
  85     krb5_creds *out;
  86     int optidx = 0;
  87     krb5_get_creds_opt opt;
  88     krb5_principal server;
  89     krb5_principal impersonate = NULL;
  90
  91     setprogname (argv[0]);
  92
  93     ret = krb5_init_context (&context);
  94     if (ret)
  95         errx(1, "krb5_init_context failed: %d", ret);
  96
  97     if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
  98         usage(1);
  99
 100     if (help_flag)
 101         usage (0);
 102
 103     if(version_flag) {
 104         print_version(NULL);
 105         exit(0);
 106     }
 107
 108     argc -= optidx;
 109     argv += optidx;
 110
 111     if (argc != 1)
 112         usage (1);
 113
 114     if(cache_str) {
 115         ret = krb5_cc_resolve(context, cache_str, &cache);
 116         if (ret)
 117             krb5_err (context, 1, ret, "%s", cache_str);
 118     } else {
 119         ret = krb5_cc_default (context, &cache);
 120         if (ret)
 121             krb5_err (context, 1, ret, "krb5_cc_resolve");
 122     }
 123
 124     ret = krb5_get_creds_opt_alloc(context, &opt);
 125     if (ret)
 126         krb5_err (context, 1, ret, "krb5_get_creds_opt_alloc");
 127
 128     if (etype_str) {
 129         krb5_enctype enctype;
 130
 131         ret = krb5_string_to_enctype(context, etype_str, &enctype);
 132         if (ret)
 133             krb5_errx (context, 1, "unrecognized enctype: %s", etype_str);
 134         krb5_get_creds_opt_set_enctype(context, opt, enctype);
 135     }
 136
 137     if (impersonate_str) {
 138         ret = krb5_parse_name(context, impersonate_str, &impersonate);
 139         if (ret)
 140             krb5_err (context, 1, ret, "krb5_parse_name %s", impersonate_str);
 141         krb5_get_creds_opt_set_impersonate(context, opt, impersonate);
 142         krb5_get_creds_opt_add_options(context, opt, KRB5_GC_NO_STORE);
 143     }
 144
 145     if (out_cache_str)
 146         krb5_get_creds_opt_add_options(context, opt, KRB5_GC_NO_STORE);
 147
 148     if (forwardable_flag)
 149         krb5_get_creds_opt_add_options(context, opt, KRB5_GC_FORWARDABLE);
 150     if (!transit_flag)
 151         krb5_get_creds_opt_add_options(context, opt, KRB5_GC_NO_TRANSIT_CHECK);
 152
 153     if (delegation_cred_str) {
 154         krb5_ccache id;
 155         krb5_creds c, mc;
 156         Ticket ticket;
 157
 158         krb5_cc_clear_mcred(&mc);
 159         ret = krb5_cc_get_principal(context, cache, &mc.server);
 160         if (ret)
 161             krb5_err (context, 1, ret, "krb5_cc_get_principal");
 162
 163         ret = krb5_cc_resolve(context, delegation_cred_str, &id);
 164         if(ret)
 165             krb5_err (context, 1, ret, "krb5_cc_resolve");
 166
 167         ret = krb5_cc_retrieve_cred(context, id, 0, &mc, &c);
 168         if(ret)
 169             krb5_err (context, 1, ret, "krb5_cc_retrieve_cred");
 170
 171         ret = decode_Ticket(c.ticket.data, c.ticket.length, &ticket, NULL);
 172         if (ret) {
 173             krb5_clear_error_string(context);
 174             krb5_err (context, 1, ret, "decode_Ticket");
 175         }
 176         krb5_free_cred_contents(context, &c);
 177
 178         ret = krb5_get_creds_opt_set_ticket(context, opt, &ticket);
 179         if(ret)
 180             krb5_err (context, 1, ret, "krb5_get_creds_opt_set_ticket");
 181         free_Ticket(&ticket);
 182
 183         krb5_cc_close (context, id);
 184         krb5_free_principal(context, mc.server);
 185
 186         krb5_get_creds_opt_add_options(context, opt,
 187                                        KRB5_GC_CONSTRAINED_DELEGATION);
 188     }
 189
 190     ret = krb5_parse_name(context, argv[0], &server);
 191     if (ret)
 192         krb5_err (context, 1, ret, "krb5_parse_name %s", argv[0]);
 193
 194     if (nametype_str) {
 195         ret = krb5_parse_nametype(context, nametype_str,
 196                                   &server->name.name_type);
 197         if (ret)
 198             krb5_err(context, 1, ret, "krb5_parse_nametype");
 199     }
 200
 201     ret = krb5_get_creds(context, opt, cache, server, &out);
 202     if (ret)
 203         krb5_err (context, 1, ret, "krb5_get_creds");
 204
 205     if (out_cache_str) {
 206         krb5_ccache id;
 207
 208         ret = krb5_cc_resolve(context, out_cache_str, &id);
 209         if(ret)
 210             krb5_err (context, 1, ret, "krb5_cc_resolve");
 211
 212         ret = krb5_cc_initialize(context, id, out->client);
 213         if(ret)
 214             krb5_err (context, 1, ret, "krb5_cc_initialize");
 215
 216         ret = krb5_cc_store_cred(context, id, out);
 217         if(ret)
 218             krb5_err (context, 1, ret, "krb5_cc_store_cred");
 219         krb5_cc_close (context, id);
 220     }
 221
 222     krb5_free_creds(context, out);
 223     krb5_free_principal(context, server);
 224     krb5_get_creds_opt_free(context, opt);
 225     krb5_cc_close (context, cache);
 226     krb5_free_context (context);
 227
 228     return 0;
 229 }