crypto/dist/heimdal/admin/change.c

   1 /*
   2  * Copyright (c) 1997-2005 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 #include "ktutil_locl.h"
  35
  36 __RCSID("$Heimdal: change.c 15578 2005-07-07 20:44:48Z lha $"
  37         "$NetBSD$");
  38
  39 static krb5_error_code
  40 change_entry (krb5_keytab keytab,
  41               krb5_principal principal, krb5_kvno kvno,
  42               const char *realm, const char *admin_server, int server_port)
  43 {
  44     krb5_error_code ret;
  45     kadm5_config_params conf;
  46     void *kadm_handle;
  47     char *client_name;
  48     krb5_keyblock *keys;
  49     int num_keys;
  50     int i;
  51
  52     ret = krb5_unparse_name (context, principal, &client_name);
  53     if (ret) {
  54         krb5_warn (context, ret, "krb5_unparse_name");
  55         return ret;
  56     }
  57
  58     memset (&conf, 0, sizeof(conf));
  59
  60     if(realm == NULL)
  61         realm = krb5_principal_get_realm(context, principal);
  62     conf.realm = strdup(realm);
  63     if (conf.realm == NULL) {
  64         free (client_name);
  65         krb5_set_error_string(context, "malloc failed");
  66         return ENOMEM;
  67     }
  68     conf.mask |= KADM5_CONFIG_REALM;
  69
  70     if (admin_server) {
  71         conf.admin_server = strdup(admin_server);
  72         if (conf.admin_server == NULL) {
  73             free(client_name);
  74             free(conf.realm);
  75             krb5_set_error_string(context, "malloc failed");
  76             return ENOMEM;
  77         }
  78         conf.mask |= KADM5_CONFIG_ADMIN_SERVER;
  79     }
  80
  81     if (server_port) {
  82         conf.kadmind_port = htons(server_port);
  83         conf.mask |= KADM5_CONFIG_KADMIND_PORT;
  84     }
  85
  86     ret = kadm5_init_with_skey_ctx (context,
  87                                     client_name,
  88                                     keytab_string,
  89                                     KADM5_ADMIN_SERVICE,
  90                                     &conf, 0, 0,
  91                                     &kadm_handle);
  92     free(conf.admin_server);
  93     free(conf.realm);
  94     if (ret) {
  95         krb5_warn (context, ret,
  96                    "kadm5_c_init_with_skey_ctx: %s:", client_name);
  97         free (client_name);
  98         return ret;
  99     }
 100     ret = kadm5_randkey_principal (kadm_handle, principal, &keys, &num_keys);
 101     kadm5_destroy (kadm_handle);
 102     if (ret) {
 103         krb5_warn(context, ret, "kadm5_randkey_principal: %s:", client_name);
 104         free (client_name);
 105         return ret;
 106     }
 107     free (client_name);
 108     for (i = 0; i < num_keys; ++i) {
 109         krb5_keytab_entry new_entry;
 110
 111         new_entry.principal = principal;
 112         new_entry.timestamp = time (NULL);
 113         new_entry.vno = kvno + 1;
 114         new_entry.keyblock  = keys[i];
 115
 116         ret = krb5_kt_add_entry (context, keytab, &new_entry);
 117         if (ret)
 118             krb5_warn (context, ret, "krb5_kt_add_entry");
 119         krb5_free_keyblock_contents (context, &keys[i]);
 120     }
 121     return ret;
 122 }
 123
 124 /*
 125  * loop over all the entries in the keytab (or those given) and change
 126  * their keys, writing the new keys
 127  */
 128
 129 struct change_set {
 130     krb5_principal principal;
 131     krb5_kvno kvno;
 132 };
 133
 134 int
 135 kt_change (struct change_options *opt, int argc, char **argv)
 136 {
 137     krb5_error_code ret;
 138     krb5_keytab keytab;
 139     krb5_kt_cursor cursor;
 140     krb5_keytab_entry entry;
 141     int i, j, max;
 142     struct change_set *changeset;
 143     int errors = 0;
 144
 145     if((keytab = ktutil_open_keytab()) == NULL)
 146         return 1;
 147
 148     j = 0;
 149     max = 0;
 150     changeset = NULL;
 151
 152     ret = krb5_kt_start_seq_get(context, keytab, &cursor);
 153     if(ret){
 154         krb5_warn(context, ret, "%s", keytab_string);
 155         goto out;
 156     }
 157
 158     while((ret = krb5_kt_next_entry(context, keytab, &entry, &cursor)) == 0) {
 159         int add = 0;
 160
 161         for (i = 0; i < j; ++i) {
 162             if (krb5_principal_compare (context, changeset[i].principal,
 163                                         entry.principal)) {
 164                 if (changeset[i].kvno < entry.vno)
 165                     changeset[i].kvno = entry.vno;
 166                 break;
 167             }
 168         }
 169         if (i < j) {
 170             krb5_kt_free_entry (context, &entry);
 171             continue;
 172         }
 173
 174         if (argc == 0) {
 175             add = 1;
 176         } else {
 177             for (i = 0; i < argc; ++i) {
 178                 krb5_principal princ;
 179
 180                 ret = krb5_parse_name (context, argv[i], &princ);
 181                 if (ret) {
 182                     krb5_warn (context, ret, "%s", argv[i]);
 183                     continue;
 184                 }
 185                 if (krb5_principal_compare (context, princ, entry.principal))
 186                     add = 1;
 187
 188                 krb5_free_principal (context, princ);
 189             }
 190         }
 191
 192         if (add) {
 193             if (j >= max) {
 194                 void *tmp;
 195
 196                 max = max(max * 2, 1);
 197                 tmp = realloc (changeset, max * sizeof(*changeset));
 198                 if (tmp == NULL) {
 199                     krb5_kt_free_entry (context, &entry);
 200                     krb5_warnx (context, "realloc: out of memory");
 201                     ret = ENOMEM;
 202                     break;
 203                 }
 204                 changeset = tmp;
 205             }
 206             ret = krb5_copy_principal (context, entry.principal,
 207                                        &changeset[j].principal);
 208             if (ret) {
 209                 krb5_warn (context, ret, "krb5_copy_principal");
 210                 krb5_kt_free_entry (context, &entry);
 211                 break;
 212             }
 213             changeset[j].kvno = entry.vno;
 214             ++j;
 215         }
 216         krb5_kt_free_entry (context, &entry);
 217     }
 218     krb5_kt_end_seq_get(context, keytab, &cursor);
 219
 220     if (ret == KRB5_KT_END) {
 221         ret = 0;
 222         for (i = 0; i < j; i++) {
 223             if (verbose_flag) {
 224                 char *client_name;
 225
 226                 ret = krb5_unparse_name (context, changeset[i].principal,
 227                                          &client_name);
 228                 if (ret) {
 229                     krb5_warn (context, ret, "krb5_unparse_name");
 230                 } else {
 231                     printf("Changing %s kvno %d\n",
 232                            client_name, changeset[i].kvno);
 233                     free(client_name);
 234                 }
 235             }
 236             ret = change_entry (keytab,
 237                                 changeset[i].principal, changeset[i].kvno,
 238                                 opt->realm_string,
 239                                 opt->admin_server_string,
 240                                 opt->server_port_integer);
 241             if (ret != 0)
 242                 errors = 1;
 243         }
 244     } else
 245         errors = 1;
 246     for (i = 0; i < j; i++)
 247         krb5_free_principal (context, changeset[i].principal);
 248     free (changeset);
 249
 250  out:
 251     krb5_kt_close(context, keytab);
 252     return errors;
 253 }