crypto/dist/heimdal/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("$Heimdal: chpass_s.c 20608 2007-05-08 07:11:48Z lha $"
  37         "$NetBSD$");
  38
  39 static kadm5_ret_t
  40 change(void *server_handle,
  41        krb5_principal princ,
  42        const char *password,
  43        int cond)
  44 {
  45     kadm5_server_context *context = server_handle;
  46     hdb_entry_ex ent;
  47     kadm5_ret_t ret;
  48     Key *keys;
  49     size_t num_keys;
  50     int cmp = 1;
  51
  52     memset(&ent, 0, sizeof(ent));
  53     ret = context->db->hdb_open(context->context, context->db, O_RDWR, 0);
  54     if(ret)
  55         return ret;
  56     ret = context->db->hdb_fetch(context->context, context->db, princ,
  57                                  HDB_F_DECRYPT|HDB_F_GET_ANY, &ent);
  58     if(ret == HDB_ERR_NOENTRY)
  59         goto out;
  60
  61     num_keys = ent.entry.keys.len;
  62     keys     = ent.entry.keys.val;
  63
  64     ent.entry.keys.len = 0;
  65     ent.entry.keys.val = NULL;
  66
  67     ret = _kadm5_set_keys(context, &ent.entry, password);
  68     if(ret) {
  69         _kadm5_free_keys (context->context, num_keys, keys);
  70         goto out2;
  71     }
  72     ent.entry.kvno++;
  73     if (cond)
  74         cmp = _kadm5_cmp_keys (ent.entry.keys.val, ent.entry.keys.len,
  75                                keys, num_keys);
  76     _kadm5_free_keys (context->context, num_keys, keys);
  77
  78     if (cmp == 0) {
  79         krb5_set_error_string(context->context, "Password reuse forbidden");
  80         ret = KADM5_PASS_REUSE;
  81         goto out2;
  82     }
  83
  84     ret = _kadm5_set_modifier(context, &ent.entry);
  85     if(ret)
  86         goto out2;
  87
  88     ret = _kadm5_bump_pw_expire(context, &ent.entry);
  89     if (ret)
  90         goto out2;
  91
  92     ret = hdb_seal_keys(context->context, context->db, &ent.entry);
  93     if (ret)
  94         goto out2;
  95
  96     ret = context->db->hdb_store(context->context, context->db,
  97                                  HDB_F_REPLACE, &ent);
  98     if (ret)
  99         goto out2;
 100
 101     kadm5_log_modify (context,
 102                       &ent.entry,
 103                       KADM5_PRINCIPAL | KADM5_MOD_NAME | KADM5_MOD_TIME |
 104                       KADM5_KEY_DATA | KADM5_KVNO | KADM5_PW_EXPIRATION |
 105                       KADM5_TL_DATA);
 106
 107 out2:
 108     hdb_free_entry(context->context, &ent);
 109 out:
 110     context->db->hdb_close(context->context, context->db);
 111     return _kadm5_error_code(ret);
 112 }
 113
 114
 115
 116 /*
 117  * change the password of `princ' to `password' if it's not already that.
 118  */
 119
 120 kadm5_ret_t
 121 kadm5_s_chpass_principal_cond(void *server_handle,
 122                               krb5_principal princ,
 123                               const char *password)
 124 {
 125     return change (server_handle, princ, password, 1);
 126 }
 127
 128 /*
 129  * change the password of `princ' to `password'
 130  */
 131
 132 kadm5_ret_t
 133 kadm5_s_chpass_principal(void *server_handle,
 134                          krb5_principal princ,
 135                          const char *password)
 136 {
 137     return change (server_handle, princ, password, 0);
 138 }
 139
 140 /*
 141  * change keys for `princ' to `keys'
 142  */
 143
 144 kadm5_ret_t
 145 kadm5_s_chpass_principal_with_key(void *server_handle,
 146                                   krb5_principal princ,
 147                                   int n_key_data,
 148                                   krb5_key_data *key_data)
 149 {
 150     kadm5_server_context *context = server_handle;
 151     hdb_entry_ex ent;
 152     kadm5_ret_t ret;
 153
 154     memset(&ent, 0, sizeof(ent));
 155     ret = context->db->hdb_open(context->context, context->db, O_RDWR, 0);
 156     if(ret)
 157         return ret;
 158     ret = context->db->hdb_fetch(context->context, context->db, princ,
 159                                  HDB_F_GET_ANY, &ent);
 160     if(ret == HDB_ERR_NOENTRY)
 161         goto out;
 162     ret = _kadm5_set_keys2(context, &ent.entry, n_key_data, key_data);
 163     if(ret)
 164         goto out2;
 165     ent.entry.kvno++;
 166     ret = _kadm5_set_modifier(context, &ent.entry);
 167     if(ret)
 168         goto out2;
 169     ret = _kadm5_bump_pw_expire(context, &ent.entry);
 170     if (ret)
 171         goto out2;
 172
 173     ret = hdb_seal_keys(context->context, context->db, &ent.entry);
 174     if (ret)
 175         goto out2;
 176
 177     ret = context->db->hdb_store(context->context, context->db,
 178                                  HDB_F_REPLACE, &ent);
 179     if (ret)
 180         goto out2;
 181
 182     kadm5_log_modify (context,
 183                       &ent.entry,
 184                       KADM5_PRINCIPAL | KADM5_MOD_NAME | KADM5_MOD_TIME |
 185                       KADM5_KEY_DATA | KADM5_KVNO | KADM5_PW_EXPIRATION |
 186                       KADM5_TL_DATA);
 187
 188 out2:
 189     hdb_free_entry(context->context, &ent);
 190 out:
 191     context->db->hdb_close(context->context, context->db);
 192     return _kadm5_error_code(ret);
 193 }