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 keepold;
  39     int random_key;
  40     int random_password;
  41     char *password;
  42     krb5_key_data *key_data;
  43 };
  44
  45 static int
  46 set_random_key (krb5_principal principal, int keepold)
  47 {
  48     krb5_error_code ret;
  49     int i;
  50     krb5_keyblock *keys;
  51     int num_keys;
  52
  53     ret = kadm5_randkey_principal_3(kadm_handle, principal, keepold, 0, NULL,
  54                                     &keys, &num_keys);
  55     if(ret)
  56         return ret;
  57     for(i = 0; i < num_keys; i++)
  58         krb5_free_keyblock_contents(context, &keys[i]);
  59     free(keys);
  60     return 0;
  61 }
  62
  63 static int
  64 set_random_password (krb5_principal principal, int keepold)
  65 {
  66     krb5_error_code ret;
  67     char pw[128];
  68
  69     random_password (pw, sizeof(pw));
  70     ret = kadm5_chpass_principal_3(kadm_handle, principal, keepold, 0, NULL, pw);
  71     if (ret == 0) {
  72         char *princ_name;
  73
  74         krb5_unparse_name(context, principal, &princ_name);
  75
  76         printf ("%s's password set to \"%s\"\n", princ_name, pw);
  77         free (princ_name);
  78     }
  79     memset (pw, 0, sizeof(pw));
  80     return ret;
  81 }
  82
  83 static int
  84 set_password (krb5_principal principal, char *password, int keepold)
  85 {
  86     krb5_error_code ret = 0;
  87     char pwbuf[128];
  88     int aret;
  89
  90     if(password == NULL) {
  91         char *princ_name;
  92         char *prompt;
  93
  94         ret = krb5_unparse_name(context, principal, &princ_name);
  95         if (ret)
  96             return ret;
  97         aret = asprintf(&prompt, "%s's Password: ", princ_name);
  98         free (princ_name);
  99         if (aret == -1)
 100             return ENOMEM;
 101         ret = UI_UTIL_read_pw_string(pwbuf, sizeof(pwbuf), prompt, 1);
 102         free (prompt);
 103         if(ret){
 104             return 0; /* XXX error code? */
 105         }
 106         password = pwbuf;
 107     }
 108     if(ret == 0)
 109         ret = kadm5_chpass_principal_3(kadm_handle, principal, keepold, 0, NULL,
 110                                        password);
 111     memset(pwbuf, 0, sizeof(pwbuf));
 112     return ret;
 113 }
 114
 115 static int
 116 set_key_data (krb5_principal principal, krb5_key_data *key_data, int keepold)
 117 {
 118     krb5_error_code ret;
 119
 120     ret = kadm5_chpass_principal_with_key_3(kadm_handle, principal, keepold,
 121                                             3, key_data);
 122     return ret;
 123 }
 124
 125 static int
 126 do_cpw_entry(krb5_principal principal, void *data)
 127 {
 128     struct cpw_entry_data *e = data;
 129
 130     if (e->random_key)
 131         return set_random_key (principal, e->keepold);
 132     else if (e->random_password)
 133         return set_random_password (principal, e->keepold);
 134     else if (e->key_data)
 135         return set_key_data (principal, e->key_data, e->keepold);
 136     else
 137         return set_password (principal, e->password, e->keepold);
 138 }
 139
 140 int
 141 cpw_entry(struct passwd_options *opt, int argc, char **argv)
 142 {
 143     krb5_error_code ret = 0;
 144     int i;
 145     struct cpw_entry_data data;
 146     int num;
 147     krb5_key_data key_data[3];
 148
 149     data.keepold = opt->keepold_flag;
 150     data.random_key = opt->random_key_flag;
 151     data.random_password = opt->random_password_flag;
 152     data.password = opt->password_string;
 153     data.key_data        = NULL;
 154
 155     num = 0;
 156     if (data.random_key)
 157         ++num;
 158     if (data.random_password)
 159         ++num;
 160     if (data.password)
 161         ++num;
 162     if (opt->key_string)
 163         ++num;
 164
 165     if (num > 1) {
 166         fprintf (stderr, "give only one of "
 167                 "--random-key, --random-password, --password, --key\n");
 168         return 1;
 169     }
 170
 171     if (opt->key_string) {
 172         const char *error;
 173
 174         if (parse_des_key (opt->key_string, key_data, &error)) {
 175             fprintf (stderr, "failed parsing key \"%s\": %s\n",
 176                      opt->key_string, error);
 177             return 1;
 178         }
 179         data.key_data = key_data;
 180     }
 181
 182     for(i = 0; i < argc; i++)
 183         ret = foreach_principal(argv[i], do_cpw_entry, "cpw", &data);
 184
 185     if (data.key_data) {
 186         int16_t dummy;
 187         kadm5_free_key_data (kadm_handle, &dummy, key_data);
 188     }
 189
 190     return ret != 0;
 191 }