kadmin/init.c

   1 /*
   2  * Copyright (c) 1997-2004 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * 3. Neither the name of the Institute nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include "kadmin_locl.h"
  37 #include "kadmin-commands.h"
  38 #include <kadm5/private.h>
  39
  40 static kadm5_ret_t
  41 create_random_entry(krb5_principal princ,
  42                     unsigned max_life,
  43                     unsigned max_rlife,
  44                     uint32_t attributes)
  45 {
  46     kadm5_principal_ent_rec ent;
  47     kadm5_ret_t ret;
  48     int mask = 0;
  49     krb5_keyblock *keys;
  50     int n_keys, i;
  51     char *name;
  52     const char *password;
  53     char pwbuf[512];
  54
  55     random_password(pwbuf, sizeof(pwbuf));
  56     password = pwbuf;
  57
  58     ret = krb5_unparse_name(context, princ, &name);
  59     if (ret) {
  60         krb5_warn(context, ret, "failed to unparse principal name");
  61         return ret;
  62     }
  63
  64     memset(&ent, 0, sizeof(ent));
  65     ent.principal = princ;
  66     mask |= KADM5_PRINCIPAL;
  67     if (max_life) {
  68         ent.max_life = max_life;
  69         mask |= KADM5_MAX_LIFE;
  70     }
  71     if (max_rlife) {
  72         ent.max_renewable_life = max_rlife;
  73         mask |= KADM5_MAX_RLIFE;
  74     }
  75     ent.attributes |= attributes | KRB5_KDB_DISALLOW_ALL_TIX;
  76     mask |= KADM5_ATTRIBUTES;
  77
  78     /* Create the entry with a random password */
  79     ret = kadm5_create_principal(kadm_handle, &ent, mask, password);
  80     if(ret) {
  81         krb5_warn(context, ret, "create_random_entry(%s): randkey failed",
  82                   name);
  83         goto out;
  84     }
  85
  86     /* Replace the string2key based keys with real random bytes */
  87     ret = kadm5_randkey_principal(kadm_handle, princ, &keys, &n_keys);
  88     if(ret) {
  89         krb5_warn(context, ret, "create_random_entry(%s): randkey failed",
  90                   name);
  91         goto out;
  92     }
  93     for(i = 0; i < n_keys; i++)
  94         krb5_free_keyblock_contents(context, &keys[i]);
  95     free(keys);
  96     ret = kadm5_get_principal(kadm_handle, princ, &ent,
  97                               KADM5_PRINCIPAL | KADM5_ATTRIBUTES);
  98     if(ret) {
  99         krb5_warn(context, ret, "create_random_entry(%s): "
 100                   "unable to get principal", name);
 101         goto out;
 102     }
 103     ent.attributes &= (~KRB5_KDB_DISALLOW_ALL_TIX);
 104     ent.kvno = 1;
 105     ret = kadm5_modify_principal(kadm_handle, &ent,
 106                                  KADM5_ATTRIBUTES|KADM5_KVNO);
 107     kadm5_free_principal_ent (kadm_handle, &ent);
 108     if(ret) {
 109         krb5_warn(context, ret, "create_random_entry(%s): "
 110                   "unable to modify principal", name);
 111         goto out;
 112     }
 113  out:
 114     free(name);
 115     return ret;
 116 }
 117
 118 extern int local_flag;
 119
 120 int
 121 init(struct init_options *opt, int argc, char **argv)
 122 {
 123     kadm5_ret_t ret;
 124     int i;
 125     HDB *db;
 126     krb5_deltat max_life = 0, max_rlife = 0;
 127
 128     if (!local_flag) {
 129         krb5_warnx(context, "init is only available in local (-l) mode");
 130         return 0;
 131     }
 132
 133     if (opt->realm_max_ticket_life_string) {
 134         if (str2deltat (opt->realm_max_ticket_life_string, &max_life) != 0) {
 135             krb5_warnx (context, "unable to parse \"%s\"",
 136                         opt->realm_max_ticket_life_string);
 137             return 0;
 138         }
 139     }
 140     if (opt->realm_max_renewable_life_string) {
 141         if (str2deltat (opt->realm_max_renewable_life_string, &max_rlife) != 0) {
 142             krb5_warnx (context, "unable to parse \"%s\"",
 143                         opt->realm_max_renewable_life_string);
 144             return 0;
 145         }
 146     }
 147
 148     db = _kadm5_s_get_db(kadm_handle);
 149
 150     ret = db->hdb_open(context, db, O_RDWR | O_CREAT, 0600);
 151     if(ret){
 152         krb5_warn(context, ret, "hdb_open");
 153         return 0;
 154     }
 155     db->hdb_close(context, db);
 156     for(i = 0; i < argc; i++){
 157         krb5_principal princ;
 158         const char *realm = argv[i];
 159
 160         if (opt->realm_max_ticket_life_string == NULL) {
 161             max_life = 0;
 162             if(edit_deltat ("Realm max ticket life", &max_life, NULL, 0)) {
 163                 return 0;
 164             }
 165         }
 166         if (opt->realm_max_renewable_life_string == NULL) {
 167             max_rlife = 0;
 168             if(edit_deltat("Realm max renewable ticket life", &max_rlife,
 169                            NULL, 0)) {
 170                 return 0;
 171             }
 172         }
 173
 174         /* Create `krbtgt/REALM' */
 175         ret = krb5_make_principal(context, &princ, realm,
 176                                   KRB5_TGS_NAME, realm, NULL);
 177         if(ret)
 178             return 0;
 179
 180         create_random_entry(princ, max_life, max_rlife, 0);
 181         krb5_free_principal(context, princ);
 182
 183         if (opt->bare_flag)
 184             continue;
 185
 186         /* Create `kadmin/changepw' */
 187         krb5_make_principal(context, &princ, realm,
 188                             "kadmin", "changepw", NULL);
 189         /*
 190          * The Windows XP (at least) password changing protocol
 191          * request the `kadmin/changepw' ticket with `renewable_ok,
 192          * renewable, forwardable' and so fails if we disallow
 193          * forwardable here.
 194          */
 195         create_random_entry(princ, 5*60, 5*60,
 196                             KRB5_KDB_DISALLOW_TGT_BASED|
 197                             KRB5_KDB_PWCHANGE_SERVICE|
 198                             KRB5_KDB_DISALLOW_POSTDATED|
 199                             KRB5_KDB_DISALLOW_RENEWABLE|
 200                             KRB5_KDB_DISALLOW_PROXIABLE|
 201                             KRB5_KDB_REQUIRES_PRE_AUTH);
 202         krb5_free_principal(context, princ);
 203
 204         /* Create `kadmin/admin' */
 205         krb5_make_principal(context, &princ, realm,
 206                             "kadmin", "admin", NULL);
 207         create_random_entry(princ, 60*60, 60*60, KRB5_KDB_REQUIRES_PRE_AUTH);
 208         krb5_free_principal(context, princ);
 209
 210         /* Create `changepw/kerberos' (for v4 compat) */
 211         krb5_make_principal(context, &princ, realm,
 212                             "changepw", "kerberos", NULL);
 213         create_random_entry(princ, 60*60, 60*60,
 214                             KRB5_KDB_DISALLOW_TGT_BASED|
 215                             KRB5_KDB_PWCHANGE_SERVICE);
 216
 217         krb5_free_principal(context, princ);
 218
 219         /* Create `kadmin/hprop' for database propagation */
 220         krb5_make_principal(context, &princ, realm,
 221                             "kadmin", "hprop", NULL);
 222         create_random_entry(princ, 60*60, 60*60,
 223                             KRB5_KDB_REQUIRES_PRE_AUTH|
 224                             KRB5_KDB_DISALLOW_TGT_BASED);
 225         krb5_free_principal(context, princ);
 226
 227         /* Create `WELLKNOWN/ANONYMOUS' for anonymous as-req */
 228         krb5_make_principal(context, &princ, realm,
 229                             KRB5_WELLKNOWN_NAME, KRB5_ANON_NAME, NULL);
 230         create_random_entry(princ, 60*60, 60*60,
 231                             KRB5_KDB_REQUIRES_PRE_AUTH);
 232         krb5_free_principal(context, princ);
 233
 234
 235         /* Create `default' */
 236         {
 237             kadm5_principal_ent_rec ent;
 238             int mask = 0;
 239
 240             memset (&ent, 0, sizeof(ent));
 241             mask |= KADM5_PRINCIPAL;
 242             krb5_make_principal(context, &ent.principal, realm,
 243                                 "default", NULL);
 244             mask |= KADM5_MAX_LIFE;
 245             ent.max_life = 24 * 60 * 60;
 246             mask |= KADM5_MAX_RLIFE;
 247             ent.max_renewable_life = 7 * ent.max_life;
 248             ent.attributes = KRB5_KDB_DISALLOW_ALL_TIX;
 249             mask |= KADM5_ATTRIBUTES;
 250
 251             ret = kadm5_create_principal(kadm_handle, &ent, mask, "");
 252             if (ret)
 253                 krb5_err (context, 1, ret, "kadm5_create_principal");
 254
 255             krb5_free_principal(context, ent.principal);
 256         }
 257     }
 258     return 0;
 259 }