kadmin/check.c

   1 /*
   2  * Copyright (c) 2005 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 /*
  35  * Check database for strange configurations on default principals
  36  */
  37
  38 #include "kadmin_locl.h"
  39 #include "kadmin-commands.h"
  40
  41 RCSID("$Id$");
  42
  43 static int
  44 get_check_entry(const char *name, kadm5_principal_ent_rec *ent)
  45 {
  46     krb5_error_code ret;
  47     krb5_principal principal;
  48
  49     ret = krb5_parse_name(context, name, &principal);
  50     if (ret) {
  51         krb5_warn(context, ret, "krb5_unparse_name: %s", name);
  52         return 1;
  53     }
  54
  55     memset(ent, 0, sizeof(*ent));
  56     ret = kadm5_get_principal(kadm_handle, principal, ent, 0);
  57     krb5_free_principal(context, principal);
  58     if(ret)
  59         return 1;
  60
  61     return 0;
  62 }
  63
  64
  65 static int
  66 do_check_entry(krb5_principal principal, void *data)
  67 {
  68     krb5_error_code ret;
  69     kadm5_principal_ent_rec princ;
  70     char *name;
  71     int i;
  72
  73     ret = krb5_unparse_name(context, principal, &name);
  74     if (ret)
  75         return 1;
  76
  77     memset (&princ, 0, sizeof(princ));
  78     ret = kadm5_get_principal(kadm_handle, principal, &princ,
  79                               KADM5_PRINCIPAL | KADM5_KEY_DATA);
  80     if(ret) {
  81         krb5_warn(context, ret, "Failed to get principal: %s", name);
  82         free(name);
  83         return 0;
  84     }
  85
  86     for (i = 0; i < princ.n_key_data; i++) {
  87         size_t keysize;
  88         ret = krb5_enctype_keysize(context,
  89                                    princ.key_data[i].key_data_type[0],
  90                                    &keysize);
  91         if (ret == 0 && keysize != princ.key_data[i].key_data_length[0]) {
  92             krb5_warnx(context,
  93                        "Principal %s enctype %d, wrong length: %lu\n",
  94                        name, princ.key_data[i].key_data_type[0],
  95                        (unsigned long)princ.key_data[i].key_data_length);
  96         }
  97     }
  98
  99     free(name);
 100     kadm5_free_principal_ent(kadm_handle, &princ);
 101
 102     return 0;
 103 }
 104
 105 int
 106 check(void *opt, int argc, char **argv)
 107 {
 108     kadm5_principal_ent_rec ent;
 109     krb5_error_code ret;
 110     char *realm = NULL, *p, *p2;
 111     int found;
 112
 113     if (argc == 0) {
 114         ret = krb5_get_default_realm(context, &realm);
 115         if (ret) {
 116             krb5_warn(context, ret, "krb5_get_default_realm");
 117             goto fail;
 118         }
 119     } else {
 120         realm = strdup(argv[0]);
 121         if (realm == NULL) {
 122             krb5_warnx(context, "malloc");
 123             goto fail;
 124         }
 125     }
 126
 127     /*
 128      * Check krbtgt/REALM@REALM
 129      *
 130      * For now, just check existance
 131      */
 132
 133     if (asprintf(&p, "%s/%s@%s", KRB5_TGS_NAME, realm, realm) == -1) {
 134         krb5_warn(context, errno, "asprintf");
 135         goto fail;
 136     }
 137
 138     ret = get_check_entry(p, &ent);
 139     if (ret) {
 140         printf("%s doesn't exist, are you sure %s is a realm in your database",
 141                p, realm);
 142         free(p);
 143         goto fail;
 144     }
 145     free(p);
 146
 147     kadm5_free_principal_ent(kadm_handle, &ent);
 148
 149     /*
 150      * Check kadmin/admin@REALM
 151      */
 152
 153     if (asprintf(&p, "kadmin/admin@%s", realm) == -1) {
 154         krb5_warn(context, errno, "asprintf");
 155         goto fail;
 156     }
 157
 158     ret = get_check_entry(p, &ent);
 159     if (ret) {
 160         printf("%s doesn't exist, "
 161                "there is no way to do remote administration", p);
 162         free(p);
 163         goto fail;
 164     }
 165     free(p);
 166
 167     kadm5_free_principal_ent(kadm_handle, &ent);
 168
 169     /*
 170      * Check kadmin/changepw@REALM
 171      */
 172
 173     if (asprintf(&p, "kadmin/changepw@%s", realm) == -1) {
 174         krb5_warn(context, errno, "asprintf");
 175         goto fail;
 176     }
 177
 178     ret = get_check_entry(p, &ent);
 179     if (ret) {
 180         printf("%s doesn't exist, "
 181                "there is no way to do change password", p);
 182         free(p);
 183         goto fail;
 184     }
 185     free(p);
 186
 187     kadm5_free_principal_ent(kadm_handle, &ent);
 188
 189     /*
 190      * Check for duplicate afs keys
 191      */
 192
 193     p2 = strdup(realm);
 194     if (p2 == NULL) {
 195         krb5_warn(context, errno, "malloc");
 196         free(p);
 197         goto fail;
 198     }
 199     strlwr(p2);
 200
 201     if (asprintf(&p, "afs/%s@%s", p2, realm) == -1) {
 202         krb5_warn(context, errno, "asprintf");
 203         free(p2);
 204         goto fail;
 205     }
 206     free(p2);
 207
 208     ret = get_check_entry(p, &ent);
 209     free(p);
 210     if (ret == 0) {
 211         kadm5_free_principal_ent(kadm_handle, &ent);
 212         found = 1;
 213     } else
 214         found = 0;
 215
 216     if (asprintf(&p, "afs@%s", realm) == -1) {
 217         krb5_warn(context, errno, "asprintf");
 218         goto fail;
 219     }
 220
 221     ret = get_check_entry(p, &ent);
 222     free(p);
 223     if (ret == 0) {
 224         kadm5_free_principal_ent(kadm_handle, &ent);
 225         if (found) {
 226             krb5_warnx(context, "afs@REALM and afs/cellname@REALM both exists");
 227             goto fail;
 228         }
 229     }
 230
 231     foreach_principal("*", do_check_entry, "check", NULL);
 232
 233     free(realm);
 234     return 0;
 235 fail:
 236     free(realm);
 237     return 1;
 238 }