kadmin/add_enctype.c

   1 /*
   2  * Copyright (c) 1999-2006 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 /*
  38  * del_enctype principal enctypes...
  39  */
  40
  41 int
  42 add_enctype(struct add_enctype_options*opt, int argc, char **argv)
  43 {
  44     kadm5_principal_ent_rec princ;
  45     krb5_principal princ_ent = NULL;
  46     krb5_error_code ret;
  47     const char *princ_name;
  48     int i, j;
  49     krb5_key_data *new_key_data;
  50     int n_etypes;
  51     krb5_enctype *etypes;
  52
  53     if (!opt->random_key_flag) {
  54         krb5_warnx (context, "only random key is supported now");
  55         return 0;
  56     }
  57
  58     memset(&princ, 0, sizeof(princ));
  59     princ_name = argv[0];
  60     n_etypes   = argc - 1;
  61     etypes     = malloc (n_etypes * sizeof(*etypes));
  62     if (etypes == NULL) {
  63         krb5_warnx (context, "out of memory");
  64         return 0;
  65     }
  66     argv++;
  67     for (i = 0; i < n_etypes; ++i) {
  68         ret = krb5_string_to_enctype(context, argv[i], &etypes[i]);
  69         if (ret) {
  70             krb5_warnx (context, "bad enctype \"%s\"", argv[i]);
  71             goto out2;
  72         }
  73     }
  74
  75     ret = krb5_parse_name(context, princ_name, &princ_ent);
  76     if (ret) {
  77         krb5_warn(context, ret, "krb5_parse_name %s", princ_name);
  78         goto out2;
  79     }
  80
  81     /* The principal might have zero keys, but it will still have a kvno! */
  82     ret = kadm5_get_principal(kadm_handle, princ_ent, &princ,
  83                               KADM5_KVNO | KADM5_PRINCIPAL | KADM5_KEY_DATA);
  84     if (ret) {
  85         krb5_free_principal(context, princ_ent);
  86         krb5_warnx(context, "no such principal: %s", princ_name);
  87         goto out2;
  88     }
  89
  90     /* Check that we got key data */
  91     if (kadm5_all_keys_are_bogus(princ.n_key_data, princ.key_data)) {
  92         krb5_warnx(context, "user lacks get-keys privilege");
  93         goto out;
  94     }
  95
  96     new_key_data = calloc(princ.n_key_data + n_etypes,
  97                           sizeof(*new_key_data));
  98     if (new_key_data == NULL) {
  99         krb5_warnx (context, "out of memory");
 100         goto out;
 101     }
 102
 103     for (i = 0; i < princ.n_key_data; ++i) {
 104         krb5_key_data *key = &princ.key_data[i];
 105
 106         for (j = 0; j < n_etypes; ++j) {
 107             if (etypes[j] == key->key_data_type[0]) {
 108                 /* XXX Should this be an error?  The admin can del_enctype... */
 109                 krb5_warnx(context, "enctype %d already exists",
 110                            (int)etypes[j]);
 111                 free(new_key_data);
 112                 goto out;
 113             }
 114         }
 115         new_key_data[i] = *key;
 116     }
 117
 118     for (i = 0; i < n_etypes; ++i) {
 119         int n = princ.n_key_data + i;
 120         krb5_keyblock keyblock;
 121
 122         memset(&new_key_data[n], 0, sizeof(new_key_data[n]));
 123         new_key_data[n].key_data_ver = 2;
 124         new_key_data[n].key_data_kvno = princ.kvno;
 125
 126         ret = krb5_generate_random_keyblock (context, etypes[i], &keyblock);
 127         if (ret) {
 128             krb5_warnx(context, "genernate enctype %d failed", (int)etypes[i]);
 129             while (--i >= 0)
 130                 free(new_key_data[--n].key_data_contents[0]);
 131             goto out;
 132         }
 133
 134         /* key */
 135         new_key_data[n].key_data_type[0] = etypes[i];
 136         new_key_data[n].key_data_contents[0] = malloc(keyblock.keyvalue.length);
 137         if (new_key_data[n].key_data_contents[0] == NULL) {
 138             ret = ENOMEM;
 139             krb5_warn(context, ret, "out of memory");
 140             while (--i >= 0)
 141                 free(new_key_data[--n].key_data_contents[0]);
 142             goto out;
 143         }
 144         new_key_data[n].key_data_length[0]   = keyblock.keyvalue.length;
 145         memcpy(new_key_data[n].key_data_contents[0],
 146                keyblock.keyvalue.data,
 147                keyblock.keyvalue.length);
 148         krb5_free_keyblock_contents(context, &keyblock);
 149
 150         /* salt */
 151         new_key_data[n].key_data_type[1]     = KRB5_PW_SALT;
 152         new_key_data[n].key_data_length[1]   = 0;
 153         new_key_data[n].key_data_contents[1] = NULL;
 154
 155     }
 156
 157     free (princ.key_data);
 158     princ.n_key_data += n_etypes;
 159     princ.key_data   = new_key_data;
 160     new_key_data = NULL;
 161
 162     ret = kadm5_modify_principal (kadm_handle, &princ, KADM5_KEY_DATA);
 163     if (ret)
 164         krb5_warn(context, ret, "kadm5_modify_principal");
 165 out:
 166     krb5_free_principal (context, princ_ent);
 167     kadm5_free_principal_ent(kadm_handle, &princ);
 168 out2:
 169     free (etypes);
 170     return ret != 0;
 171 }