crypto/dist/heimdal/lib/kadm5/set_keys.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 "kadm5_locl.h"
  35
  36 __RCSID("$Heimdal: set_keys.c 15888 2005-08-11 13:40:35Z lha $"
  37         "$NetBSD$");
  38
  39 /*
  40  * Set the keys of `ent' to the string-to-key of `password'
  41  */
  42
  43 kadm5_ret_t
  44 _kadm5_set_keys(kadm5_server_context *context,
  45                 hdb_entry *ent,
  46                 const char *password)
  47 {
  48     Key *keys;
  49     size_t num_keys;
  50     kadm5_ret_t ret;
  51
  52     ret = hdb_generate_key_set_password(context->context,
  53                                         ent->principal,
  54                                         password, &keys, &num_keys);
  55     if (ret)
  56         return ret;
  57
  58     _kadm5_free_keys (context->context, ent->keys.len, ent->keys.val);
  59     ent->keys.val = keys;
  60     ent->keys.len = num_keys;
  61
  62     hdb_entry_set_pw_change_time(context->context, ent, 0);
  63
  64     if (krb5_config_get_bool_default(context->context, NULL, FALSE,
  65                                      "kadmin", "save-password", NULL))
  66     {
  67         ret = hdb_entry_set_password(context->context, context->db,
  68                                      ent, password);
  69         if (ret)
  70             return ret;
  71     }
  72
  73     return 0;
  74 }
  75
  76 /*
  77  * Set the keys of `ent' to (`n_key_data', `key_data')
  78  */
  79
  80 kadm5_ret_t
  81 _kadm5_set_keys2(kadm5_server_context *context,
  82                  hdb_entry *ent,
  83                  int16_t n_key_data,
  84                  krb5_key_data *key_data)
  85 {
  86     krb5_error_code ret;
  87     int i;
  88     unsigned len;
  89     Key *keys;
  90
  91     len  = n_key_data;
  92     keys = malloc (len * sizeof(*keys));
  93     if (keys == NULL)
  94         return ENOMEM;
  95
  96     _kadm5_init_keys (keys, len);
  97
  98     for(i = 0; i < n_key_data; i++) {
  99         keys[i].mkvno = NULL;
 100         keys[i].key.keytype = key_data[i].key_data_type[0];
 101         ret = krb5_data_copy(&keys[i].key.keyvalue,
 102                              key_data[i].key_data_contents[0],
 103                              key_data[i].key_data_length[0]);
 104         if(ret)
 105             goto out;
 106         if(key_data[i].key_data_ver == 2) {
 107             Salt *salt;
 108
 109             salt = malloc(sizeof(*salt));
 110             if(salt == NULL) {
 111                 ret = ENOMEM;
 112                 goto out;
 113             }
 114             keys[i].salt = salt;
 115             salt->type = key_data[i].key_data_type[1];
 116             krb5_data_copy(&salt->salt,
 117                            key_data[i].key_data_contents[1],
 118                            key_data[i].key_data_length[1]);
 119         } else
 120             keys[i].salt = NULL;
 121     }
 122     _kadm5_free_keys (context->context, ent->keys.len, ent->keys.val);
 123     ent->keys.len = len;
 124     ent->keys.val = keys;
 125
 126     hdb_entry_set_pw_change_time(context->context, ent, 0);
 127     hdb_entry_clear_password(context->context, ent);
 128
 129     return 0;
 130  out:
 131     _kadm5_free_keys (context->context, len, keys);
 132     return ret;
 133 }
 134
 135 /*
 136  * Set the keys of `ent' to `n_keys, keys'
 137  */
 138
 139 kadm5_ret_t
 140 _kadm5_set_keys3(kadm5_server_context *context,
 141                  hdb_entry *ent,
 142                  int n_keys,
 143                  krb5_keyblock *keyblocks)
 144 {
 145     krb5_error_code ret;
 146     int i;
 147     unsigned len;
 148     Key *keys;
 149
 150     len  = n_keys;
 151     keys = malloc (len * sizeof(*keys));
 152     if (keys == NULL)
 153         return ENOMEM;
 154
 155     _kadm5_init_keys (keys, len);
 156
 157     for(i = 0; i < n_keys; i++) {
 158         keys[i].mkvno = NULL;
 159         ret = krb5_copy_keyblock_contents (context->context,
 160                                            &keyblocks[i],
 161                                            &keys[i].key);
 162         if(ret)
 163             goto out;
 164         keys[i].salt = NULL;
 165     }
 166     _kadm5_free_keys (context->context, ent->keys.len, ent->keys.val);
 167     ent->keys.len = len;
 168     ent->keys.val = keys;
 169
 170     hdb_entry_set_pw_change_time(context->context, ent, 0);
 171     hdb_entry_clear_password(context->context, ent);
 172
 173     return 0;
 174  out:
 175     _kadm5_free_keys (context->context, len, keys);
 176     return ret;
 177 }
 178
 179 /*
 180  *
 181  */
 182
 183 static int
 184 is_des_key_p(int keytype)
 185 {
 186     return keytype == ETYPE_DES_CBC_CRC ||
 187         keytype == ETYPE_DES_CBC_MD4 ||
 188         keytype == ETYPE_DES_CBC_MD5;
 189 }
 190
 191
 192 /*
 193  * Set the keys of `ent' to random keys and return them in `n_keys'
 194  * and `new_keys'.
 195  */
 196
 197 kadm5_ret_t
 198 _kadm5_set_keys_randomly (kadm5_server_context *context,
 199                           hdb_entry *ent,
 200                           krb5_keyblock **new_keys,
 201                           int *n_keys)
 202 {
 203    krb5_keyblock *kblock = NULL;
 204    kadm5_ret_t ret = 0;
 205    int i, des_keyblock;
 206    size_t num_keys;
 207    Key *keys;
 208
 209    ret = hdb_generate_key_set(context->context, ent->principal,
 210                                &keys, &num_keys, 1);
 211    if (ret)
 212         return ret;
 213
 214    kblock = malloc(num_keys * sizeof(kblock[0]));
 215    if (kblock == NULL) {
 216         ret = ENOMEM;
 217         _kadm5_free_keys (context->context, num_keys, keys);
 218         return ret;
 219    }
 220    memset(kblock, 0, num_keys * sizeof(kblock[0]));
 221
 222    des_keyblock = -1;
 223    for (i = 0; i < num_keys; i++) {
 224
 225         /*
 226          * To make sure all des keys are the the same we generate only
 227          * the first one and then copy key to all other des keys.
 228          */
 229
 230         if (des_keyblock != -1 && is_des_key_p(keys[i].key.keytype)) {
 231             ret = krb5_copy_keyblock_contents (context->context,
 232                                                &kblock[des_keyblock],
 233                                                &kblock[i]);
 234             if (ret)
 235                 goto out;
 236             kblock[i].keytype = keys[i].key.keytype;
 237         } else {
 238             ret = krb5_generate_random_keyblock (context->context,
 239                                                  keys[i].key.keytype,
 240                                                  &kblock[i]);
 241             if (ret)
 242                 goto out;
 243
 244             if (is_des_key_p(keys[i].key.keytype))
 245                 des_keyblock = i;
 246         }
 247
 248         ret = krb5_copy_keyblock_contents (context->context,
 249                                            &kblock[i],
 250                                            &keys[i].key);
 251         if (ret)
 252             goto out;
 253    }
 254
 255 out:
 256    if(ret) {
 257         for (i = 0; i < num_keys; ++i)
 258             krb5_free_keyblock_contents (context->context, &kblock[i]);
 259         free(kblock);
 260         _kadm5_free_keys (context->context, num_keys, keys);
 261         return ret;
 262    }
 263
 264    _kadm5_free_keys (context->context, ent->keys.len, ent->keys.val);
 265    ent->keys.val = keys;
 266    ent->keys.len = num_keys;
 267    *new_keys     = kblock;
 268    *n_keys       = num_keys;
 269
 270    hdb_entry_set_pw_change_time(context->context, ent, 0);
 271    hdb_entry_clear_password(context->context, ent);
 272
 273    return 0;
 274 }