crypto/heimdal-0.6.3/admin/change.c

   1 /*
   2  * Copyright (c) 1997 - 2001, 2003 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("$Id: change.c,v 1.5 2003/04/01 15:04:49 lha Exp $");
  37
  38 static void
  39 change_entry (krb5_context context, krb5_keytab keytab,
  40               krb5_principal principal, krb5_kvno kvno,
  41               const char *realm, const char *admin_server, int server_port)
  42 {
  43     krb5_error_code ret;
  44     kadm5_config_params conf;
  45     void *kadm_handle;
  46     char *client_name;
  47     krb5_keyblock *keys;
  48     int num_keys;
  49     int i;
  50
  51     ret = krb5_unparse_name (context, principal, &client_name);
  52     if (ret) {
  53         krb5_warn (context, ret, "krb5_unparse_name");
  54         return;
  55     }
  56
  57     memset (&conf, 0, sizeof(conf));
  58
  59     if(realm)
  60         conf.realm = (char *)realm;
  61     else
  62         conf.realm = *krb5_princ_realm (context, principal);
  63     conf.mask |= KADM5_CONFIG_REALM;
  64
  65     if (admin_server) {
  66         conf.admin_server = (char *)admin_server;
  67         conf.mask |= KADM5_CONFIG_ADMIN_SERVER;
  68     }
  69
  70     if (server_port) {
  71         conf.kadmind_port = htons(server_port);
  72         conf.mask |= KADM5_CONFIG_KADMIND_PORT;
  73     }
  74
  75     ret = kadm5_init_with_skey_ctx (context,
  76                                     client_name,
  77                                     keytab_string,
  78                                     KADM5_ADMIN_SERVICE,
  79                                     &conf, 0, 0,
  80                                     &kadm_handle);
  81     free (client_name);
  82     if (ret) {
  83         krb5_warn (context, ret, "kadm5_c_init_with_skey_ctx");
  84         return;
  85     }
  86     ret = kadm5_randkey_principal (kadm_handle, principal, &keys, &num_keys);
  87     kadm5_destroy (kadm_handle);
  88     if (ret) {
  89         krb5_warn(context, ret, "kadm5_randkey_principal");
  90         return;
  91     }
  92     for (i = 0; i < num_keys; ++i) {
  93         krb5_keytab_entry new_entry;
  94
  95         new_entry.principal = principal;
  96         new_entry.timestamp = time (NULL);
  97         new_entry.vno = kvno + 1;
  98         new_entry.keyblock  = keys[i];
  99
 100         ret = krb5_kt_add_entry (context, keytab, &new_entry);
 101         if (ret)
 102             krb5_warn (context, ret, "krb5_kt_add_entry");
 103         krb5_free_keyblock_contents (context, &keys[i]);
 104     }
 105 }
 106
 107 /*
 108  * loop over all the entries in the keytab (or those given) and change
 109  * their keys, writing the new keys
 110  */
 111
 112 struct change_set {
 113     krb5_principal principal;
 114     krb5_kvno kvno;
 115 };
 116
 117 int
 118 kt_change (int argc, char **argv)
 119 {
 120     krb5_error_code ret;
 121     krb5_keytab keytab;
 122     krb5_kt_cursor cursor;
 123     krb5_keytab_entry entry;
 124     char *realm = NULL;
 125     char *admin_server = NULL;
 126     int server_port = 0;
 127     int help_flag = 0;
 128     int optind = 0;
 129     int i, j, max;
 130     struct change_set *changeset;
 131
 132     struct getargs args[] = {
 133         { "realm",      'r',    arg_string,   NULL,
 134           "realm to use", "realm"
 135         },
 136         { "admin-server",       'a',    arg_string, NULL,
 137           "server to contact", "host"
 138         },
 139         { "server-port",        's',    arg_integer, NULL,
 140           "port to contact", "port number"
 141         },
 142         { "help",               'h',    arg_flag,    NULL }
 143     };
 144
 145     args[0].value = &realm;
 146     args[1].value = &admin_server;
 147     args[2].value = &server_port;
 148     args[3].value = &help_flag;
 149
 150     if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optind)
 151        || help_flag) {
 152         arg_printusage(args, sizeof(args) / sizeof(args[0]),
 153                        "ktutil change", "principal...");
 154         return 1;
 155     }
 156
 157     if((keytab = ktutil_open_keytab()) == NULL)
 158         return 1;
 159
 160     j = 0;
 161     max = 0;
 162     changeset = NULL;
 163
 164     ret = krb5_kt_start_seq_get(context, keytab, &cursor);
 165     if(ret){
 166         krb5_warn(context, ret, "krb5_kt_start_seq_get %s", keytab_string);
 167         goto out;
 168     }
 169
 170     while((ret = krb5_kt_next_entry(context, keytab, &entry, &cursor)) == 0) {
 171         int add = 0;
 172
 173         for (i = 0; i < j; ++i) {
 174             if (krb5_principal_compare (context, changeset[i].principal,
 175                                         entry.principal)) {
 176                 if (changeset[i].kvno < entry.vno)
 177                     changeset[i].kvno = entry.vno;
 178                 break;
 179             }
 180         }
 181         if (i < j)
 182             continue;
 183
 184         if (optind == argc) {
 185             add = 1;
 186         } else {
 187             for (i = optind; i < argc; ++i) {
 188                 krb5_principal princ;
 189
 190                 ret = krb5_parse_name (context, argv[i], &princ);
 191                 if (ret) {
 192                     krb5_warn (context, ret, "krb5_parse_name %s", argv[i]);
 193                     continue;
 194                 }
 195                 if (krb5_principal_compare (context, princ, entry.principal))
 196                     add = 1;
 197
 198                 krb5_free_principal (context, princ);
 199             }
 200         }
 201
 202         if (add) {
 203             if (j >= max) {
 204                 void *tmp;
 205
 206                 max = max(max * 2, 1);
 207                 tmp = realloc (changeset, max * sizeof(*changeset));
 208                 if (tmp == NULL) {
 209                     krb5_kt_free_entry (context, &entry);
 210                     krb5_warnx (context, "realloc: out of memory");
 211                     ret = ENOMEM;
 212                     break;
 213                 }
 214                 changeset = tmp;
 215             }
 216             ret = krb5_copy_principal (context, entry.principal,
 217                                        &changeset[j].principal);
 218             if (ret) {
 219                 krb5_warn (context, ret, "krb5_copy_principal");
 220                 krb5_kt_free_entry (context, &entry);
 221                 break;
 222             }
 223             changeset[j].kvno = entry.vno;
 224             ++j;
 225         }
 226         krb5_kt_free_entry (context, &entry);
 227     }
 228
 229     if (ret == KRB5_KT_END) {
 230         for (i = 0; i < j; i++) {
 231             if (verbose_flag) {
 232                 char *client_name;
 233
 234                 ret = krb5_unparse_name (context, changeset[i].principal,
 235                                          &client_name);
 236                 if (ret) {
 237                     krb5_warn (context, ret, "krb5_unparse_name");
 238                 } else {
 239                     printf("Changing %s kvno %d\n",
 240                            client_name, changeset[i].kvno);
 241                     free(client_name);
 242                 }
 243             }
 244             change_entry (context, keytab,
 245                           changeset[i].principal, changeset[i].kvno,
 246                           realm, admin_server, server_port);
 247         }
 248     }
 249     for (i = 0; i < j; i++)
 250         krb5_free_principal (context, changeset[i].principal);
 251     free (changeset);
 252
 253     ret = krb5_kt_end_seq_get(context, keytab, &cursor);
 254  out:
 255     krb5_kt_close(context, keytab);
 256     return 0;
 257 }