1/*
2 * Copyright (c) 1997-2006 Kungliga Tekniska H�gskolan
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
36RCSID("$Id: chpass_s.c 20608 2007-05-08 07:11:48Z lha $");
37
38static kadm5_ret_t
39change(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
106out2:
107    hdb_free_entry(context->context, &ent);
108out:
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
119kadm5_ret_t
120kadm5_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
131kadm5_ret_t
132kadm5_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
143kadm5_ret_t
144kadm5_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
187out2:
188    hdb_free_entry(context->context, &ent);
189out:
190    context->db->hdb_close(context->context, context->db);
191    return _kadm5_error_code(ret);
192}
193