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 static int
  42 get_check_entry(const char *name, kadm5_principal_ent_rec *ent)
  43 {
  44     krb5_error_code ret;
  45     krb5_principal principal;
  46
  47     ret = krb5_parse_name(context, name, &principal);
  48     if (ret) {
  49         krb5_warn(context, ret, "krb5_unparse_name: %s", name);
  50         return 1;
  51     }
  52
  53     memset(ent, 0, sizeof(*ent));
  54     ret = kadm5_get_principal(kadm_handle, principal, ent, KADM5_ATTRIBUTES);
  55     krb5_free_principal(context, principal);
  56     if(ret)
  57         return 1;
  58
  59     return 0;
  60 }
  61
  62
  63 static int
  64 do_check_entry(krb5_principal principal, void *data)
  65 {
  66     krb5_error_code ret;
  67     kadm5_principal_ent_rec princ;
  68     char *name;
  69     int i;
  70
  71     ret = krb5_unparse_name(context, principal, &name);
  72     if (ret)
  73         return 1;
  74
  75     memset (&princ, 0, sizeof(princ));
  76     ret = kadm5_get_principal(kadm_handle, principal, &princ,
  77                               KADM5_PRINCIPAL | KADM5_KEY_DATA);
  78     if(ret) {
  79         krb5_warn(context, ret, "Failed to get principal: %s", name);
  80         free(name);
  81         return 0;
  82     }
  83
  84     for (i = 0; i < princ.n_key_data; i++) {
  85         size_t keysize;
  86         ret = krb5_enctype_keysize(context,
  87                                    princ.key_data[i].key_data_type[0],
  88                                    &keysize);
  89         if (ret == 0 && keysize != (size_t)princ.key_data[i].key_data_length[0]) {
  90             krb5_warnx(context,
  91                        "Principal %s enctype %d, wrong length: %d\n",
  92                        name, princ.key_data[i].key_data_type[0],
  93                        princ.key_data[i].key_data_length[0]);
  94         }
  95     }
  96
  97     free(name);
  98     kadm5_free_principal_ent(kadm_handle, &princ);
  99
 100     return 0;
 101 }
 102
 103 int
 104 check(void *opt, int argc, char **argv)
 105 {
 106     kadm5_principal_ent_rec ent;
 107     krb5_error_code ret;
 108     char *realm = NULL, *p, *p2;
 109     int found;
 110
 111     if (argc == 0) {
 112         ret = krb5_get_default_realm(context, &realm);
 113         if (ret) {
 114             krb5_warn(context, ret, "krb5_get_default_realm");
 115             goto fail;
 116         }
 117     } else {
 118         realm = strdup(argv[0]);
 119         if (realm == NULL) {
 120             krb5_warnx(context, "malloc");
 121             goto fail;
 122         }
 123     }
 124
 125     /*
 126      * Check krbtgt/REALM@REALM
 127      *
 128      * For now, just check existance
 129      */
 130
 131     if (asprintf(&p, "%s/%s@%s", KRB5_TGS_NAME, realm, realm) == -1) {
 132         krb5_warn(context, errno, "asprintf");
 133         goto fail;
 134     }
 135
 136     ret = get_check_entry(p, &ent);
 137     if (ret) {
 138         printf("%s doesn't exist, are you sure %s is a realm in your database",
 139                p, realm);
 140         free(p);
 141         goto fail;
 142     }
 143     free(p);
 144
 145     kadm5_free_principal_ent(kadm_handle, &ent);
 146
 147     /*
 148      * Check kadmin/admin@REALM
 149      */
 150
 151     if (asprintf(&p, "kadmin/admin@%s", realm) == -1) {
 152         krb5_warn(context, errno, "asprintf");
 153         goto fail;
 154     }
 155
 156     ret = get_check_entry(p, &ent);
 157     if (ret) {
 158         printf("%s doesn't exist, "
 159                "there is no way to do remote administration", p);
 160         free(p);
 161         goto fail;
 162     }
 163     free(p);
 164
 165     kadm5_free_principal_ent(kadm_handle, &ent);
 166
 167     /*
 168      * Check kadmin/changepw@REALM
 169      */
 170
 171     if (asprintf(&p, "kadmin/changepw@%s", realm) == -1) {
 172         krb5_warn(context, errno, "asprintf");
 173         goto fail;
 174     }
 175
 176     ret = get_check_entry(p, &ent);
 177     if (ret) {
 178         printf("%s doesn't exist, "
 179                "there is no way to do change password", p);
 180         free(p);
 181         goto fail;
 182     }
 183     free(p);
 184
 185     kadm5_free_principal_ent(kadm_handle, &ent);
 186
 187     /*
 188      * Check default@REALM
 189      *
 190      * Check that disallow-all-tix is set on the default principal
 191      * (or that the entry doesn't exists)
 192      */
 193
 194     if (asprintf(&p, "default@%s", realm) == -1) {
 195         krb5_warn(context, errno, "asprintf");
 196         goto fail;
 197     }
 198
 199     ret = get_check_entry(p, &ent);
 200     if (ret == 0) {
 201         if ((ent.attributes & KRB5_KDB_DISALLOW_ALL_TIX) == 0) {
 202             printf("default template entry is not disabled\n");
 203             ret = EINVAL;
 204         }
 205         kadm5_free_principal_ent(kadm_handle, &ent);
 206
 207     } else {
 208         ret = 0;
 209     }
 210
 211     free(p);
 212
 213     if (ret)
 214         goto fail;
 215
 216     /*
 217      * Check for duplicate afs keys
 218      */
 219
 220     p2 = strdup(realm);
 221     if (p2 == NULL) {
 222         krb5_warn(context, errno, "malloc");
 223         goto fail;
 224     }
 225     strlwr(p2);
 226
 227     if (asprintf(&p, "afs/%s@%s", p2, realm) == -1) {
 228         krb5_warn(context, errno, "asprintf");
 229         free(p2);
 230         goto fail;
 231     }
 232     free(p2);
 233
 234     ret = get_check_entry(p, &ent);
 235     free(p);
 236     if (ret == 0) {
 237         kadm5_free_principal_ent(kadm_handle, &ent);
 238         found = 1;
 239     } else
 240         found = 0;
 241
 242     if (asprintf(&p, "afs@%s", realm) == -1) {
 243         krb5_warn(context, errno, "asprintf");
 244         goto fail;
 245     }
 246
 247     ret = get_check_entry(p, &ent);
 248     free(p);
 249     if (ret == 0) {
 250         kadm5_free_principal_ent(kadm_handle, &ent);
 251         if (found) {
 252             krb5_warnx(context, "afs@REALM and afs/cellname@REALM both exists");
 253             goto fail;
 254         }
 255     }
 256
 257     foreach_principal("*", do_check_entry, "check", NULL);
 258
 259     free(realm);
 260     return 0;
 261 fail:
 262     free(realm);
 263     return 1;
 264 }