third_party/heimdal/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(data, 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(data, &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     void *inner_kadm_handle = NULL;
 110     int found;
 111
 112     if (argc == 0) {
 113         ret = krb5_get_default_realm(context, &realm);
 114         if (ret) {
 115             krb5_warn(context, ret, "krb5_get_default_realm");
 116             goto fail;
 117         }
 118     } else {
 119         realm = strdup(argv[0]);
 120         if (realm == NULL) {
 121             krb5_warnx(context, "malloc");
 122             goto fail;
 123         }
 124     }
 125
 126     /*
 127      * Check krbtgt/REALM@REALM
 128      *
 129      * For now, just check existance
 130      */
 131
 132     if (asprintf(&p, "%s/%s@%s", KRB5_TGS_NAME, realm, realm) == -1) {
 133         krb5_warn(context, errno, "asprintf");
 134         goto fail;
 135     }
 136
 137     ret = get_check_entry(p, &ent);
 138     if (ret) {
 139         fprintf(stderr,
 140                 "%s does not exist, are you sure %s is a realm in your database?\n",
 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         fprintf(stderr,
 161                 "%s does not exist, there is no way to do remote administration.\n",
 162                 p);
 163         free(p);
 164         goto fail;
 165     }
 166     free(p);
 167
 168     kadm5_free_principal_ent(kadm_handle, &ent);
 169
 170     /*
 171      * Check kadmin/changepw@REALM
 172      */
 173
 174     if (asprintf(&p, "kadmin/changepw@%s", realm) == -1) {
 175         krb5_warn(context, errno, "asprintf");
 176         goto fail;
 177     }
 178
 179     ret = get_check_entry(p, &ent);
 180     if (ret) {
 181         fprintf(stderr,
 182                 "%s does not exist, there is no way to do change password.\n",
 183                 p);
 184         free(p);
 185         goto fail;
 186     }
 187     free(p);
 188
 189     kadm5_free_principal_ent(kadm_handle, &ent);
 190
 191     /*
 192      * Check default@REALM
 193      *
 194      * Check that disallow-all-tix is set on the default principal
 195      * (or that the entry does not exist)
 196      */
 197
 198     if (asprintf(&p, "default@%s", realm) == -1) {
 199         krb5_warn(context, errno, "asprintf");
 200         goto fail;
 201     }
 202
 203     ret = get_check_entry(p, &ent);
 204     if (ret == 0) {
 205         if ((ent.attributes & KRB5_KDB_DISALLOW_ALL_TIX) == 0) {
 206             fprintf(stderr, "default template entry is not disabled\n");
 207             ret = EINVAL;
 208         }
 209         kadm5_free_principal_ent(kadm_handle, &ent);
 210
 211     } else {
 212         ret = 0;
 213     }
 214
 215     free(p);
 216
 217     if (ret)
 218         goto fail;
 219
 220     /*
 221      * Check for duplicate afs keys
 222      */
 223
 224     p2 = strdup(realm);
 225     if (p2 == NULL) {
 226         krb5_warn(context, errno, "malloc");
 227         goto fail;
 228     }
 229     strlwr(p2);
 230
 231     if (asprintf(&p, "afs/%s@%s", p2, realm) == -1) {
 232         krb5_warn(context, errno, "asprintf");
 233         free(p2);
 234         goto fail;
 235     }
 236     free(p2);
 237
 238     ret = get_check_entry(p, &ent);
 239     free(p);
 240     if (ret == 0) {
 241         kadm5_free_principal_ent(kadm_handle, &ent);
 242         found = 1;
 243     } else
 244         found = 0;
 245
 246     if (asprintf(&p, "afs@%s", realm) == -1) {
 247         krb5_warn(context, errno, "asprintf");
 248         goto fail;
 249     }
 250
 251     ret = get_check_entry(p, &ent);
 252     free(p);
 253     if (ret == 0) {
 254         kadm5_free_principal_ent(kadm_handle, &ent);
 255         if (found) {
 256             krb5_warnx(context, "afs@REALM and afs/cellname@REALM both exists");
 257             goto fail;
 258         }
 259     }
 260
 261     ret = kadm5_dup_context(kadm_handle, &inner_kadm_handle);
 262     if (ret == 0)
 263         ret = foreach_principal("*", do_check_entry, "check", inner_kadm_handle);
 264     if (inner_kadm_handle)
 265         kadm5_destroy(inner_kadm_handle);
 266     if (ret) {
 267         krb5_warn(context, ret, "Could not iterate principals in realm");
 268         goto fail;
 269     }
 270
 271     free(realm);
 272     return 0;
 273 fail:
 274     free(realm);
 275     return 1;
 276 }