kpasswd/kpasswd.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 "kpasswd_locl.h"
  40 RCSID("$Id$");
  41
  42 static int version_flag;
  43 static int help_flag;
  44
  45 static struct getargs args[] = {
  46     { "version",                0,   arg_flag, &version_flag,
  47       "print version", NULL },
  48     { "help",                   0,   arg_flag, &help_flag,
  49       NULL, NULL}
  50 };
  51
  52 static void
  53 usage (int ret)
  54 {
  55     arg_printusage (args,
  56                     sizeof(args)/sizeof(*args),
  57                     "[principal]");
  58     exit (ret);
  59 }
  60
  61 int
  62 main (int argc, char **argv)
  63 {
  64     krb5_error_code ret;
  65     krb5_context context;
  66     krb5_principal principal;
  67     int optind = 0;
  68     krb5_get_init_creds_opt opt;
  69     krb5_creds cred;
  70     int result_code;
  71     krb5_data result_code_string, result_string;
  72     char pwbuf[BUFSIZ];
  73
  74     set_progname (argv[0]);
  75
  76     if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optind))
  77         usage(1);
  78
  79     if (help_flag)
  80         usage (0);
  81
  82     if(version_flag){
  83         printf("%s (%s-%s)\n", __progname, PACKAGE, VERSION);
  84         exit(0);
  85     }
  86
  87     krb5_get_init_creds_opt_init (&opt);
  88
  89     krb5_get_init_creds_opt_set_tkt_life (&opt, 300);
  90
  91     argc -= optind;
  92     argv += optind;
  93
  94     ret = krb5_init_context (&context);
  95     if (ret)
  96         errx (1, "krb5_init_context: %s", krb5_get_err_text(context, ret));
  97
  98     if(argv[0]) {
  99         ret = krb5_parse_name (context, argv[0], &principal);
 100         if (ret)
 101             errx (1, "krb5_parse_name: %s", krb5_get_err_text(context, ret));
 102     } else
 103         principal = NULL;
 104
 105     ret = krb5_get_init_creds_password (context,
 106                                         &cred,
 107                                         principal,
 108                                         NULL,
 109                                         krb5_prompter_posix,
 110                                         NULL,
 111                                         0,
 112                                         "kadmin/changepw",
 113                                         &opt);
 114     if (ret)
 115         errx (1, "krb5_get_initial_creds: %s",
 116               krb5_get_err_text(context, ret));
 117
 118     krb5_data_zero (&result_code_string);
 119     krb5_data_zero (&result_string);
 120
 121     if(des_read_pw_string (pwbuf, sizeof(pwbuf), "New password: ", 1) != 0)
 122         return 1;
 123
 124     ret = krb5_change_password (context, &cred, pwbuf,
 125                                 &result_code,
 126                                 &result_code_string,
 127                                 &result_string);
 128     if (ret)
 129         errx (1, "krb5_change_password: %s",
 130               krb5_get_err_text(context, ret));
 131
 132     printf ("%.*s\n", result_string.length, result_string.data);
 133
 134     krb5_data_free (&result_code_string);
 135     krb5_data_free (&result_string);
 136
 137     krb5_free_creds_contents (context, &cred);
 138     krb5_free_context (context);
 139     return result_code;
 140 }