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 #define CRE_DUP_OK      1
  41
  42 static kadm5_ret_t
  43 create_random_entry(krb5_principal princ,
  44                     unsigned max_life,
  45                     unsigned max_rlife,
  46                     uint32_t attributes,
  47                     unsigned flags)
  48 {
  49     kadm5_principal_ent_rec ent;
  50     kadm5_ret_t ret;
  51     int mask = 0;
  52     krb5_keyblock *keys;
  53     int n_keys, i;
  54     char *name;
  55     const char *password;
  56     char pwbuf[512];
  57
  58     random_password(pwbuf, sizeof(pwbuf));
  59     password = pwbuf;
  60
  61     ret = krb5_unparse_name(context, princ, &name);
  62     if (ret) {
  63         krb5_warn(context, ret, "failed to unparse principal name");
  64         return ret;
  65     }
  66
  67     memset(&ent, 0, sizeof(ent));
  68     ent.principal = princ;
  69     mask |= KADM5_PRINCIPAL;
  70     if (max_life) {
  71         ent.max_life = max_life;
  72         mask |= KADM5_MAX_LIFE;
  73     }
  74     if (max_rlife) {
  75         ent.max_renewable_life = max_rlife;
  76         mask |= KADM5_MAX_RLIFE;
  77     }
  78     ent.attributes |= attributes | KRB5_KDB_DISALLOW_ALL_TIX;
  79     mask |= KADM5_ATTRIBUTES;
  80
  81     /* Create the entry with a random password */
  82     ret = kadm5_create_principal(kadm_handle, &ent, mask, password);
  83     if(ret) {
  84         if (ret == KADM5_DUP && (flags & CRE_DUP_OK))
  85             goto out;
  86         krb5_warn(context, ret, "create_random_entry(%s): randkey failed",
  87                   name);
  88         goto out;
  89     }
  90
  91     /* Replace the string2key based keys with real random bytes */
  92     ret = kadm5_randkey_principal(kadm_handle, princ, &keys, &n_keys);
  93     if(ret) {
  94         krb5_warn(context, ret, "create_random_entry(%s): randkey failed",
  95                   name);
  96         goto out;
  97     }
  98     for(i = 0; i < n_keys; i++)
  99         krb5_free_keyblock_contents(context, &keys[i]);
 100     free(keys);
 101     ret = kadm5_get_principal(kadm_handle, princ, &ent,
 102                               KADM5_PRINCIPAL | KADM5_ATTRIBUTES);
 103     if(ret) {
 104         krb5_warn(context, ret, "create_random_entry(%s): "
 105                   "unable to get principal", name);
 106         goto out;
 107     }
 108     ent.attributes &= (~KRB5_KDB_DISALLOW_ALL_TIX);
 109     ent.kvno = 1;
 110     ret = kadm5_modify_principal(kadm_handle, &ent,
 111                                  KADM5_ATTRIBUTES|KADM5_KVNO);
 112     kadm5_free_principal_ent (kadm_handle, &ent);
 113     if(ret) {
 114         krb5_warn(context, ret, "create_random_entry(%s): "
 115                   "unable to modify principal", name);
 116         goto out;
 117     }
 118  out:
 119     free(name);
 120     return ret;
 121 }
 122
 123 extern int local_flag;
 124
 125 int
 126 init(struct init_options *opt, int argc, char **argv)
 127 {
 128     kadm5_ret_t ret;
 129     int i;
 130     HDB *db;
 131     krb5_deltat max_life = 0, max_rlife = 0;
 132
 133     if (!local_flag) {
 134         krb5_warnx(context, "init is only available in local (-l) mode");
 135         return 0;
 136     }
 137
 138     if (opt->realm_max_ticket_life_string) {
 139         if (str2deltat (opt->realm_max_ticket_life_string, &max_life) != 0) {
 140             krb5_warnx (context, "unable to parse \"%s\"",
 141                         opt->realm_max_ticket_life_string);
 142             return 0;
 143         }
 144     }
 145     if (opt->realm_max_renewable_life_string) {
 146         if (str2deltat (opt->realm_max_renewable_life_string, &max_rlife) != 0) {
 147             krb5_warnx (context, "unable to parse \"%s\"",
 148                         opt->realm_max_renewable_life_string);
 149             return 0;
 150         }
 151     }
 152
 153     db = _kadm5_s_get_db(kadm_handle);
 154
 155     ret = db->hdb_open(context, db, O_RDWR | O_CREAT, 0600);
 156     if(ret){
 157         krb5_warn(context, ret, "hdb_open");
 158         return 0;
 159     }
 160     db->hdb_close(context, db);
 161     for(i = 0; i < argc; i++){
 162         krb5_principal princ;
 163         const char *realm = argv[i];
 164
 165         if (opt->realm_max_ticket_life_string == NULL) {
 166             max_life = 0;
 167             if(edit_deltat ("Realm max ticket life", &max_life, NULL, 0)) {
 168                 return 0;
 169             }
 170         }
 171         if (opt->realm_max_renewable_life_string == NULL) {
 172             max_rlife = 0;
 173             if(edit_deltat("Realm max renewable ticket life", &max_rlife,
 174                            NULL, 0)) {
 175                 return 0;
 176             }
 177         }
 178
 179         /* Create `krbtgt/REALM' */
 180         ret = krb5_make_principal(context, &princ, realm,
 181                                   KRB5_TGS_NAME, realm, NULL);
 182         if(ret)
 183             return 0;
 184
 185         create_random_entry(princ, max_life, max_rlife, 0, 0);
 186         krb5_free_principal(context, princ);
 187
 188         if (opt->bare_flag)
 189             continue;
 190
 191         /* Create `kadmin/changepw' */
 192         krb5_make_principal(context, &princ, realm,
 193                             "kadmin", "changepw", NULL);
 194         /*
 195          * The Windows XP (at least) password changing protocol
 196          * request the `kadmin/changepw' ticket with `renewable_ok,
 197          * renewable, forwardable' and so fails if we disallow
 198          * forwardable here.
 199          */
 200         create_random_entry(princ, 5*60, 5*60,
 201                             KRB5_KDB_DISALLOW_TGT_BASED|
 202                             KRB5_KDB_PWCHANGE_SERVICE|
 203                             KRB5_KDB_DISALLOW_POSTDATED|
 204                             KRB5_KDB_DISALLOW_RENEWABLE|
 205                             KRB5_KDB_DISALLOW_PROXIABLE|
 206                             KRB5_KDB_REQUIRES_PRE_AUTH,
 207                             0);
 208         krb5_free_principal(context, princ);
 209
 210         /* Create `kadmin/admin' */
 211         krb5_make_principal(context, &princ, realm,
 212                             "kadmin", "admin", NULL);
 213         create_random_entry(princ, 60*60, 60*60, KRB5_KDB_REQUIRES_PRE_AUTH, 0);
 214         krb5_free_principal(context, princ);
 215
 216         /* Create `changepw/kerberos' (for v4 compat) */
 217         krb5_make_principal(context, &princ, realm,
 218                             "changepw", "kerberos", NULL);
 219         create_random_entry(princ, 60*60, 60*60,
 220                             KRB5_KDB_DISALLOW_TGT_BASED|
 221                             KRB5_KDB_PWCHANGE_SERVICE, 0);
 222
 223         krb5_free_principal(context, princ);
 224
 225         /* Create `kadmin/hprop' for database propagation */
 226         krb5_make_principal(context, &princ, realm,
 227                             "kadmin", "hprop", NULL);
 228         create_random_entry(princ, 60*60, 60*60,
 229                             KRB5_KDB_REQUIRES_PRE_AUTH|
 230                             KRB5_KDB_DISALLOW_TGT_BASED, 0);
 231         krb5_free_principal(context, princ);
 232
 233         /* Create `WELLKNOWN/ANONYMOUS' for anonymous as-req */
 234         krb5_make_principal(context, &princ, realm,
 235                             KRB5_WELLKNOWN_NAME, KRB5_ANON_NAME, NULL);
 236         create_random_entry(princ, 60*60, 60*60,
 237                             KRB5_KDB_REQUIRES_PRE_AUTH, 0);
 238         krb5_free_principal(context, princ);
 239
 240
 241         /* Create `WELLKNONW/org.h5l.fast-cookie@WELLKNOWN:ORG.H5L' for FAST cookie */
 242         krb5_make_principal(context, &princ, KRB5_WELLKNOWN_ORG_H5L_REALM,
 243                             KRB5_WELLKNOWN_NAME, "org.h5l.fast-cookie", NULL);
 244         create_random_entry(princ, 60*60, 60*60,
 245                             KRB5_KDB_REQUIRES_PRE_AUTH|
 246                             KRB5_KDB_DISALLOW_TGT_BASED|
 247                             KRB5_KDB_DISALLOW_ALL_TIX, CRE_DUP_OK);
 248         krb5_free_principal(context, princ);
 249
 250         /* Create `default' */
 251         {
 252             kadm5_principal_ent_rec ent;
 253             int mask = 0;
 254
 255             memset (&ent, 0, sizeof(ent));
 256             mask |= KADM5_PRINCIPAL;
 257             krb5_make_principal(context, &ent.principal, realm,
 258                                 "default", NULL);
 259             mask |= KADM5_MAX_LIFE;
 260             ent.max_life = 24 * 60 * 60;
 261             mask |= KADM5_MAX_RLIFE;
 262             ent.max_renewable_life = 7 * ent.max_life;
 263             ent.attributes = KRB5_KDB_DISALLOW_ALL_TIX;
 264             mask |= KADM5_ATTRIBUTES;
 265
 266             ret = kadm5_create_principal(kadm_handle, &ent, mask, "");
 267             if (ret)
 268                 krb5_err (context, 1, ret, "kadm5_create_principal");
 269
 270             krb5_free_principal(context, ent.principal);
 271         }
 272     }
 273     return 0;
 274 }