1  /*
  2   * Copyright (c) 1997 - 2005, 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  static int help_flag = 0;
 37  static int version_flag = 0;
 38  
 39  static struct getargs args[] = {
 40      { "version", 	0,   arg_flag, &version_flag },
 41      { "help",		0,   arg_flag, &help_flag }
 42  };
 43  
 44  static void
 45  usage (int ret)
 46  {
 47      arg_printusage (args,
 48  		    sizeof(args)/sizeof(*args),
 49  		    NULL,
 50  		    "[principal]");
 51      exit (ret);
 52  }
 53  
 54  int
 55  main(int argc, char **argv)
 56  {
 57      krb5_context context;
 58      krb5_error_code ret;
 59      krb5_creds cred;
 60      krb5_preauthtype pre_auth_types[] = {KRB5_PADATA_ENC_TIMESTAMP};
 61      krb5_get_init_creds_opt *get_options;
 62      krb5_verify_init_creds_opt verify_options;
 63      krb5_principal principal = NULL;
 64      int optidx = 0;
 65  
 66      setprogname (argv[0]);
 67  
 68      if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
 69  	usage(1);
 70  
 71      if (help_flag)
 72  	usage (0);
 73  
 74      if(version_flag) {
 75  	print_version(NULL);
 76  	exit(0);
 77      }
 78  
 79      argc -= optidx;
 80      argv += optidx;
 81  
 82      ret = krb5_init_context(&context);
 83      if (ret)
 84  	errx (1, "krb5_init_context failed: %d", ret);
 85  
 86      ret = krb5_get_init_creds_opt_alloc (context, &get_options);
 87      if (ret)
 88  	krb5_err(context, 1, ret, "krb5_get_init_creds_opt_alloc");
 89  
 90      krb5_get_init_creds_opt_set_preauth_list (get_options,
 91  					      pre_auth_types,
 92  					      1);
 93  
 94      krb5_verify_init_creds_opt_init (&verify_options);
 95  
 96      if (argc) {
 97  	ret = krb5_parse_name(context, argv[0], &principal);
 98  	if (ret)
 99  	    krb5_err(context, 1, ret, "krb5_parse_name: %s", argv[0]);
100      } else {
101  	ret = krb5_get_default_principal(context, &principal);
102  	if (ret)
103  	    krb5_err(context, 1, ret, "krb5_get_default_principal");
104  
105      }
106  
107      ret = krb5_get_init_creds_password (context,
108  					&cred,
109  					principal,
110  					NULL,
111  					krb5_prompter_posix,
112  					NULL,
113  					0,
114  					NULL,
115  					get_options);
116      if (ret)
117  	krb5_err(context, 1, ret,  "krb5_get_init_creds");
118  
119      ret = krb5_verify_init_creds (context,
120  				  &cred,
121  				  NULL,
122  				  NULL,
123  				  NULL,
124  				  &verify_options);
125      if (ret)
126  	krb5_err(context, 1, ret, "krb5_verify_init_creds");
127      krb5_free_cred_contents (context, &cred);
128      krb5_free_context (context);
129      return 0;
130  }