kadmin/ext.c

   1 /*
   2  * Copyright (c) 1997 - 2006 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 "kadmin_locl.h"
  35 #include "kadmin-commands.h"
  36
  37 struct ext_keytab_data {
  38     krb5_keytab keytab;
  39 };
  40
  41 static int
  42 do_ext_keytab(krb5_principal principal, void *data)
  43 {
  44     krb5_error_code ret;
  45     kadm5_principal_ent_rec princ;
  46     struct ext_keytab_data *e = data;
  47     krb5_keytab_entry *keys = NULL;
  48     krb5_keyblock *k = NULL;
  49     int i;
  50     int n_k = 0;
  51
  52     ret = kadm5_get_principal(kadm_handle, principal, &princ,
  53                               KADM5_PRINCIPAL|KADM5_KVNO|KADM5_KEY_DATA);
  54     if (ret)
  55         return ret;
  56
  57     if (princ.n_key_data) {
  58         keys = calloc(sizeof(*keys), princ.n_key_data);
  59         if (keys == NULL) {
  60             kadm5_free_principal_ent(kadm_handle, &princ);
  61             krb5_clear_error_message(context);
  62             return ENOMEM;
  63         }
  64         for (i = 0; i < princ.n_key_data; i++) {
  65             krb5_key_data *kd = &princ.key_data[i];
  66
  67             /*
  68              * If the kadm5 client princ lacks get-keys then it may get
  69              * bogus keys four bytes long.
  70              */
  71             if (kd->key_data_length[0] == sizeof (KADM5_BOGUS_KEY_DATA) - 1 &&
  72                 memcmp(kd->key_data_contents[0], KADM5_BOGUS_KEY_DATA,
  73                        kd->key_data_length[0]) == 0)
  74                 continue;
  75
  76             keys[i].principal = princ.principal;
  77             keys[i].vno = kd->key_data_kvno;
  78             keys[i].keyblock.keytype = kd->key_data_type[0];
  79             keys[i].keyblock.keyvalue.length = kd->key_data_length[0];
  80             keys[i].keyblock.keyvalue.data = kd->key_data_contents[0];
  81             keys[i].timestamp = time(NULL);
  82             n_k++;
  83         }
  84     }
  85
  86     if (n_k == 0) {
  87         /* Probably lack get-keys privilege, but we may be able to set keys */
  88         ret = kadm5_randkey_principal(kadm_handle, principal, &k, &n_k);
  89         if (ret) {
  90             kadm5_free_principal_ent(kadm_handle, &princ);
  91             return ret;
  92         }
  93         keys = calloc(sizeof(*keys), n_k);
  94         if (keys == NULL) {
  95             kadm5_free_principal_ent(kadm_handle, &princ);
  96             krb5_clear_error_message(context);
  97             return ENOMEM;
  98         }
  99         for (i = 0; i < n_k; i++) {
 100             keys[i].principal = principal;
 101             keys[i].vno = princ.kvno + 1; /* XXX get entry again */
 102             keys[i].keyblock = k[i];
 103             keys[i].timestamp = time(NULL);
 104         }
 105     }
 106
 107     for (i = 0; i < n_k; i++) {
 108         ret = krb5_kt_add_entry(context, e->keytab, &keys[i]);
 109         if (ret)
 110             krb5_warn(context, ret, "krb5_kt_add_entry(%d)", i);
 111     }
 112
 113     if (k) {
 114         memset(k, 0, n_k * sizeof(*k));
 115         free(k);
 116     }
 117     if (keys)
 118         free(keys);
 119     kadm5_free_principal_ent(kadm_handle, &princ);
 120     return 0;
 121 }
 122
 123 int
 124 ext_keytab(struct ext_keytab_options *opt, int argc, char **argv)
 125 {
 126     krb5_error_code ret;
 127     int i;
 128     struct ext_keytab_data data;
 129
 130     if (opt->keytab_string == NULL)
 131         ret = krb5_kt_default(context, &data.keytab);
 132     else
 133         ret = krb5_kt_resolve(context, opt->keytab_string, &data.keytab);
 134
 135     if(ret){
 136         krb5_warn(context, ret, "krb5_kt_resolve");
 137         return 1;
 138     }
 139
 140     for(i = 0; i < argc; i++) {
 141         ret = foreach_principal(argv[i], do_ext_keytab, "ext", &data);
 142         if (ret)
 143             break;
 144     }
 145
 146     krb5_kt_close(context, data.keytab);
 147
 148     return ret != 0;
 149 }