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        const char *password,
  42        int cond)
  43 {
  44     kadm5_server_context *context = server_handle;
  45     hdb_entry_ex ent;
  46     kadm5_ret_t ret;
  47     Key *keys;
  48     size_t num_keys;
  49     int cmp = 1;
  50
  51     memset(&ent, 0, sizeof(ent));
  52     ret = context->db->hdb_open(context->context, context->db, O_RDWR, 0);
  53     if(ret)
  54         return ret;
  55     ret = context->db->hdb_fetch(context->context, context->db, princ,
  56                                  HDB_F_DECRYPT|HDB_F_GET_ANY, &ent);
  57     if(ret == HDB_ERR_NOENTRY)
  58         goto out;
  59
  60     num_keys = ent.entry.keys.len;
  61     keys     = ent.entry.keys.val;
  62
  63     ent.entry.keys.len = 0;
  64     ent.entry.keys.val = NULL;
  65
  66     ret = _kadm5_set_keys(context, &ent.entry, password);
  67     if(ret) {
  68         _kadm5_free_keys (context->context, num_keys, keys);
  69         goto out2;
  70     }
  71     ent.entry.kvno++;
  72     if (cond)
  73         cmp = _kadm5_cmp_keys (ent.entry.keys.val, ent.entry.keys.len,
  74                                keys, num_keys);
  75     _kadm5_free_keys (context->context, num_keys, keys);
  76
  77     if (cmp == 0) {
  78         krb5_set_error_string(context->context, "Password reuse forbidden");
  79         ret = KADM5_PASS_REUSE;
  80         goto out2;
  81     }
  82
  83     ret = _kadm5_set_modifier(context, &ent.entry);
  84     if(ret)
  85         goto out2;
  86
  87     ret = _kadm5_bump_pw_expire(context, &ent.entry);
  88     if (ret)
  89         goto out2;
  90
  91     ret = hdb_seal_keys(context->context, context->db, &ent.entry);
  92     if (ret)
  93         goto out2;
  94
  95     ret = context->db->hdb_store(context->context, context->db,
  96                                  HDB_F_REPLACE, &ent);
  97     if (ret)
  98         goto out2;
  99
 100     kadm5_log_modify (context,
 101                       &ent.entry,
 102                       KADM5_PRINCIPAL | KADM5_MOD_NAME | KADM5_MOD_TIME |
 103                       KADM5_KEY_DATA | KADM5_KVNO | KADM5_PW_EXPIRATION |
 104                       KADM5_TL_DATA);
 105
 106 out2:
 107     hdb_free_entry(context->context, &ent);
 108 out:
 109     context->db->hdb_close(context->context, context->db);
 110     return _kadm5_error_code(ret);
 111 }
 112
 113
 114
 115 /*
 116  * change the password of `princ' to `password' if it's not already that.
 117  */
 118
 119 kadm5_ret_t
 120 kadm5_s_chpass_principal_cond(void *server_handle,
 121                               krb5_principal princ,
 122                               const char *password)
 123 {
 124     return change (server_handle, princ, password, 1);
 125 }
 126
 127 /*
 128  * change the password of `princ' to `password'
 129  */
 130
 131 kadm5_ret_t
 132 kadm5_s_chpass_principal(void *server_handle,
 133                          krb5_principal princ,
 134                          const char *password)
 135 {
 136     return change (server_handle, princ, password, 0);
 137 }
 138
 139 /*
 140  * change keys for `princ' to `keys'
 141  */
 142
 143 kadm5_ret_t
 144 kadm5_s_chpass_principal_with_key(void *server_handle,
 145                                   krb5_principal princ,
 146                                   int n_key_data,
 147                                   krb5_key_data *key_data)
 148 {
 149     kadm5_server_context *context = server_handle;
 150     hdb_entry_ex ent;
 151     kadm5_ret_t ret;
 152
 153     memset(&ent, 0, sizeof(ent));
 154     ret = context->db->hdb_open(context->context, context->db, O_RDWR, 0);
 155     if(ret)
 156         return ret;
 157     ret = context->db->hdb_fetch(context->context, context->db, princ,
 158                                  HDB_F_GET_ANY, &ent);
 159     if(ret == HDB_ERR_NOENTRY)
 160         goto out;
 161     ret = _kadm5_set_keys2(context, &ent.entry, n_key_data, key_data);
 162     if(ret)
 163         goto out2;
 164     ent.entry.kvno++;
 165     ret = _kadm5_set_modifier(context, &ent.entry);
 166     if(ret)
 167         goto out2;
 168     ret = _kadm5_bump_pw_expire(context, &ent.entry);
 169     if (ret)
 170         goto out2;
 171
 172     ret = hdb_seal_keys(context->context, context->db, &ent.entry);
 173     if (ret)
 174         goto out2;
 175
 176     ret = context->db->hdb_store(context->context, context->db,
 177                                  HDB_F_REPLACE, &ent);
 178     if (ret)
 179         goto out2;
 180
 181     kadm5_log_modify (context,
 182                       &ent.entry,
 183                       KADM5_PRINCIPAL | KADM5_MOD_NAME | KADM5_MOD_TIME |
 184                       KADM5_KEY_DATA | KADM5_KVNO | KADM5_PW_EXPIRATION |
 185                       KADM5_TL_DATA);
 186
 187 out2:
 188     hdb_free_entry(context->context, &ent);
 189 out:
 190     context->db->hdb_close(context->context, context->db);
 191     return _kadm5_error_code(ret);
 192 }