lib/kadm5/chpass_s.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 "kadm5_locl.h"
  35
  36 RCSID("$Id$");
  37
  38 static kadm5_ret_t
  39 change(void *server_handle,
  40        krb5_principal princ,
  41        int keepold,
  42        int n_ks_tuple,
  43        krb5_key_salt_tuple *ks_tuple,
  44        const char *password,
  45        int cond)
  46 {
  47     kadm5_server_context *context = server_handle;
  48     hdb_entry_ex ent;
  49     kadm5_ret_t ret;
  50     Key *keys;
  51     size_t num_keys;
  52     int existsp = 0;
  53
  54     memset(&ent, 0, sizeof(ent));
  55     if (!context->keep_open) {
  56         ret = context->db->hdb_open(context->context, context->db, O_RDWR, 0);
  57         if(ret)
  58             return ret;
  59     }
  60
  61     ret = kadm5_log_init(context);
  62     if (ret)
  63         goto out;
  64
  65     ret = context->db->hdb_fetch_kvno(context->context, context->db, princ,
  66                                       HDB_F_DECRYPT|HDB_F_GET_ANY|HDB_F_ADMIN_DATA, 0, &ent);
  67     if (ret)
  68         goto out2;
  69
  70     if (keepold || cond) {
  71         /*
  72          * We save these for now so we can handle password history checking;
  73          * we handle keepold further below.
  74          */
  75         ret = hdb_add_current_keys_to_history(context->context, &ent.entry);
  76         if (ret)
  77             goto out3;
  78     }
  79
  80     if (context->db->hdb_capability_flags & HDB_CAP_F_HANDLE_PASSWORDS) {
  81         ret = context->db->hdb_password(context->context, context->db,
  82                                         &ent, password, cond);
  83         if (ret)
  84             goto out3;
  85     } else {
  86
  87         num_keys = ent.entry.keys.len;
  88         keys     = ent.entry.keys.val;
  89
  90         ent.entry.keys.len = 0;
  91         ent.entry.keys.val = NULL;
  92
  93         ret = _kadm5_set_keys(context, &ent.entry, n_ks_tuple, ks_tuple,
  94                               password);
  95         if(ret) {
  96             _kadm5_free_keys(context->context, num_keys, keys);
  97             goto out3;
  98         }
  99         _kadm5_free_keys(context->context, num_keys, keys);
 100
 101         if (cond) {
 102             HDB_extension *ext;
 103
 104             ext = hdb_find_extension(&ent.entry, choice_HDB_extension_data_hist_keys);
 105             if (ext != NULL)
 106                 existsp = _kadm5_exists_keys_hist(ent.entry.keys.val,
 107                                                   ent.entry.keys.len,
 108                                                   &ext->data.u.hist_keys);
 109         }
 110
 111         if (existsp) {
 112             ret = KADM5_PASS_REUSE;
 113             krb5_set_error_message(context->context, ret,
 114                                    "Password reuse forbidden");
 115             goto out3;
 116         }
 117     }
 118     ent.entry.kvno++;
 119
 120     ent.entry.flags.require_pwchange = 0;
 121
 122     if (!keepold) {
 123         HDB_extension ext;
 124
 125         memset(&ext, 0, sizeof (ext));
 126         ext.mandatory = FALSE;
 127         ext.data.element = choice_HDB_extension_data_hist_keys;
 128         ret = hdb_replace_extension(context->context, &ent.entry, &ext);
 129         if (ret)
 130             goto out3;
 131     }
 132
 133     ret = hdb_seal_keys(context->context, context->db, &ent.entry);
 134     if (ret)
 135         goto out3;
 136
 137     ret = _kadm5_set_modifier(context, &ent.entry);
 138     if(ret)
 139         goto out3;
 140
 141     ret = _kadm5_bump_pw_expire(context, &ent.entry);
 142     if (ret)
 143         goto out3;
 144
 145     /* This logs the change for iprop and writes to the HDB */
 146     ret = kadm5_log_modify(context, &ent.entry,
 147                            KADM5_ATTRIBUTES | KADM5_PRINCIPAL |
 148                            KADM5_MOD_NAME | KADM5_MOD_TIME |
 149                            KADM5_KEY_DATA | KADM5_KVNO |
 150                            KADM5_PW_EXPIRATION | KADM5_TL_DATA);
 151
 152  out3:
 153     hdb_free_entry(context->context, &ent);
 154  out2:
 155     (void) kadm5_log_end(context);
 156  out:
 157     if (!context->keep_open) {
 158         kadm5_ret_t ret2;
 159         ret2 = context->db->hdb_close(context->context, context->db);
 160         if (ret == 0 && ret2 != 0)
 161             ret = ret2;
 162     }
 163     return _kadm5_error_code(ret);
 164 }
 165
 166
 167
 168 /*
 169  * change the password of `princ' to `password' if it's not already that.
 170  */
 171
 172 kadm5_ret_t
 173 kadm5_s_chpass_principal_cond(void *server_handle,
 174                               krb5_principal princ,
 175                               int keepold,
 176                               const char *password)
 177 {
 178     return change (server_handle, princ, keepold, 0, NULL, password, 1);
 179 }
 180
 181 /*
 182  * change the password of `princ' to `password'
 183  */
 184
 185 kadm5_ret_t
 186 kadm5_s_chpass_principal(void *server_handle,
 187                          krb5_principal princ,
 188                          int keepold,
 189                          int n_ks_tuple,
 190                          krb5_key_salt_tuple *ks_tuple,
 191                          const char *password)
 192 {
 193     return change (server_handle, princ, keepold,
 194         n_ks_tuple, ks_tuple, password, 0);
 195 }
 196
 197 /*
 198  * change keys for `princ' to `keys'
 199  */
 200
 201 kadm5_ret_t
 202 kadm5_s_chpass_principal_with_key(void *server_handle,
 203                                   krb5_principal princ,
 204                                   int keepold,
 205                                   int n_key_data,
 206                                   krb5_key_data *key_data)
 207 {
 208     kadm5_server_context *context = server_handle;
 209     hdb_entry_ex ent;
 210     kadm5_ret_t ret;
 211
 212     memset(&ent, 0, sizeof(ent));
 213     if (!context->keep_open) {
 214         ret = context->db->hdb_open(context->context, context->db, O_RDWR, 0);
 215         if(ret)
 216             return ret;
 217     }
 218
 219     ret = kadm5_log_init(context);
 220     if (ret)
 221         goto out;
 222
 223     ret = context->db->hdb_fetch_kvno(context->context, context->db, princ, 0,
 224                                       HDB_F_GET_ANY|HDB_F_ADMIN_DATA, &ent);
 225     if (ret == HDB_ERR_NOENTRY)
 226         goto out2;
 227     if (keepold) {
 228         ret = hdb_add_current_keys_to_history(context->context, &ent.entry);
 229         if (ret)
 230             goto out3;
 231     }
 232     ret = _kadm5_set_keys2(context, &ent.entry, n_key_data, key_data);
 233     if (ret)
 234         goto out3;
 235     ent.entry.kvno++;
 236     ret = _kadm5_set_modifier(context, &ent.entry);
 237     if (ret)
 238         goto out3;
 239     ret = _kadm5_bump_pw_expire(context, &ent.entry);
 240     if (ret)
 241         goto out3;
 242
 243     if (keepold) {
 244         ret = hdb_seal_keys(context->context, context->db, &ent.entry);
 245         if (ret)
 246             goto out3;
 247     } else {
 248         HDB_extension ext;
 249
 250         memset(&ext, 0, sizeof (ext));
 251         ext.mandatory = FALSE;
 252         ext.data.element = choice_HDB_extension_data_hist_keys;
 253         ext.data.u.hist_keys.len = 0;
 254         ext.data.u.hist_keys.val = NULL;
 255         hdb_replace_extension(context->context, &ent.entry, &ext);
 256     }
 257
 258     /* This logs the change for iprop and writes to the HDB */
 259     ret = kadm5_log_modify(context, &ent.entry,
 260                            KADM5_PRINCIPAL | KADM5_MOD_NAME |
 261                            KADM5_MOD_TIME | KADM5_KEY_DATA | KADM5_KVNO |
 262                            KADM5_PW_EXPIRATION | KADM5_TL_DATA);
 263
 264  out3:
 265     hdb_free_entry(context->context, &ent);
 266  out2:
 267     (void) kadm5_log_end(context);
 268  out:
 269     if (!context->keep_open) {
 270         kadm5_ret_t ret2;
 271         ret2 = context->db->hdb_close(context->context, context->db);
 272         if (ret == 0 && ret2 != 0)
 273             ret = ret2;
 274     }
 275     return _kadm5_error_code(ret);
 276 }