kadmin/cpw.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 "kadmin_locl.h"
  35 #include "kadmin-commands.h"
  36
  37 struct cpw_entry_data {
  38     int random_key;
  39     int random_password;
  40     char *password;
  41     krb5_key_data *key_data;
  42 };
  43
  44 static int
  45 set_random_key (krb5_principal principal)
  46 {
  47     krb5_error_code ret;
  48     int i;
  49     krb5_keyblock *keys;
  50     int num_keys;
  51
  52     ret = kadm5_randkey_principal(kadm_handle, principal, &keys, &num_keys);
  53     if(ret)
  54         return ret;
  55     for(i = 0; i < num_keys; i++)
  56         krb5_free_keyblock_contents(context, &keys[i]);
  57     free(keys);
  58     return 0;
  59 }
  60
  61 static int
  62 set_random_password (krb5_principal principal)
  63 {
  64     krb5_error_code ret;
  65     char pw[128];
  66
  67     random_password (pw, sizeof(pw));
  68     ret = kadm5_chpass_principal(kadm_handle, principal, pw);
  69     if (ret == 0) {
  70         char *princ_name;
  71
  72         krb5_unparse_name(context, principal, &princ_name);
  73
  74         printf ("%s's password set to \"%s\"\n", princ_name, pw);
  75         free (princ_name);
  76     }
  77     memset (pw, 0, sizeof(pw));
  78     return ret;
  79 }
  80
  81 static int
  82 set_password (krb5_principal principal, char *password)
  83 {
  84     krb5_error_code ret = 0;
  85     char pwbuf[128];
  86
  87     if(password == NULL) {
  88         char *princ_name;
  89         char *prompt;
  90
  91         krb5_unparse_name(context, principal, &princ_name);
  92         asprintf(&prompt, "%s's Password: ", princ_name);
  93         free (princ_name);
  94         ret = UI_UTIL_read_pw_string(pwbuf, sizeof(pwbuf), prompt, 1);
  95         free (prompt);
  96         if(ret){
  97             return 0; /* XXX error code? */
  98         }
  99         password = pwbuf;
 100     }
 101     if(ret == 0)
 102         ret = kadm5_chpass_principal(kadm_handle, principal, password);
 103     memset(pwbuf, 0, sizeof(pwbuf));
 104     return ret;
 105 }
 106
 107 static int
 108 set_key_data (krb5_principal principal, krb5_key_data *key_data)
 109 {
 110     krb5_error_code ret;
 111
 112     ret = kadm5_chpass_principal_with_key (kadm_handle, principal,
 113                                            3, key_data);
 114     return ret;
 115 }
 116
 117 static int
 118 do_cpw_entry(krb5_principal principal, void *data)
 119 {
 120     struct cpw_entry_data *e = data;
 121
 122     if (e->random_key)
 123         return set_random_key (principal);
 124     else if (e->random_password)
 125         return set_random_password (principal);
 126     else if (e->key_data)
 127         return set_key_data (principal, e->key_data);
 128     else
 129         return set_password (principal, e->password);
 130 }
 131
 132 int
 133 cpw_entry(struct passwd_options *opt, int argc, char **argv)
 134 {
 135     krb5_error_code ret = 0;
 136     int i;
 137     struct cpw_entry_data data;
 138     int num;
 139     krb5_key_data key_data[3];
 140
 141     data.random_key = opt->random_key_flag;
 142     data.random_password = opt->random_password_flag;
 143     data.password = opt->password_string;
 144     data.key_data        = NULL;
 145
 146     num = 0;
 147     if (data.random_key)
 148         ++num;
 149     if (data.random_password)
 150         ++num;
 151     if (data.password)
 152         ++num;
 153     if (opt->key_string)
 154         ++num;
 155
 156     if (num > 1) {
 157         fprintf (stderr, "give only one of "
 158                 "--random-key, --random-password, --password, --key\n");
 159         return 1;
 160     }
 161
 162     if (opt->key_string) {
 163         const char *error;
 164
 165         if (parse_des_key (opt->key_string, key_data, &error)) {
 166             fprintf (stderr, "failed parsing key \"%s\": %s\n",
 167                      opt->key_string, error);
 168             return 1;
 169         }
 170         data.key_data = key_data;
 171     }
 172
 173     for(i = 0; i < argc; i++)
 174         ret = foreach_principal(argv[i], do_cpw_entry, "cpw", &data);
 175
 176     if (data.key_data) {
 177         int16_t dummy;
 178         kadm5_free_key_data (kadm_handle, &dummy, key_data);
 179     }
 180
 181     return ret != 0;
 182 }