1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
|
/*
Unix SMB/CIFS implementation.
krb5 set password implementation
Copyright (C) Remus Koos 2001 (remuskoos@yahoo.com)
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "ads.h"
#include "secrets.h"
#include "librpc/gen_ndr/ndr_secrets.h"
#ifdef HAVE_KRB5
ADS_STATUS ads_change_trust_account_password(ADS_STRUCT *ads, char *host_principal)
{
const char *password = NULL;
const char *new_password = NULL;
ADS_STATUS ret;
const char *domain = lp_workgroup();
struct secrets_domain_info1 *info = NULL;
struct secrets_domain_info1_change *prev = NULL;
const DATA_BLOB *cleartext_blob = NULL;
DATA_BLOB pw_blob = data_blob_null;
DATA_BLOB new_pw_blob = data_blob_null;
NTSTATUS status;
struct timeval tv = timeval_current();
NTTIME now = timeval_to_nttime(&tv);
int role = lp_server_role();
bool ok;
if (role != ROLE_DOMAIN_MEMBER) {
DBG_ERR("Machine account password change only supported on a DOMAIN_MEMBER.\n");
return ADS_ERROR_NT(NT_STATUS_INVALID_SERVER_STATE);
}
new_password = trust_pw_new_value(talloc_tos(), SEC_CHAN_WKSTA, SEC_ADS);
if (new_password == NULL) {
ret = ADS_ERROR_SYSTEM(errno);
DEBUG(1,("Failed to generate machine password\n"));
return ret;
}
status = secrets_prepare_password_change(domain,
ads->auth.kdc_server,
new_password,
talloc_tos(),
&info, &prev);
if (!NT_STATUS_IS_OK(status)) {
return ADS_ERROR_NT(status);
}
if (prev != NULL) {
status = NT_STATUS_REQUEST_NOT_ACCEPTED;
secrets_failed_password_change("localhost",
status,
NT_STATUS_NOT_COMMITTED,
info);
return ADS_ERROR_NT(status);
}
cleartext_blob = &info->password->cleartext_blob;
ok = convert_string_talloc(talloc_tos(), CH_UTF16MUNGED, CH_UNIX,
cleartext_blob->data,
cleartext_blob->length,
(void **)&pw_blob.data,
&pw_blob.length);
if (!ok) {
status = NT_STATUS_UNMAPPABLE_CHARACTER;
if (errno == ENOMEM) {
status = NT_STATUS_NO_MEMORY;
}
DBG_ERR("convert_string_talloc(CH_UTF16MUNGED, CH_UNIX) "
"failed for password of %s - %s\n",
domain, nt_errstr(status));
return ADS_ERROR_NT(status);
}
password = (const char *)pw_blob.data;
cleartext_blob = &info->next_change->password->cleartext_blob;
ok = convert_string_talloc(talloc_tos(), CH_UTF16MUNGED, CH_UNIX,
cleartext_blob->data,
cleartext_blob->length,
(void **)&new_pw_blob.data,
&new_pw_blob.length);
if (!ok) {
status = NT_STATUS_UNMAPPABLE_CHARACTER;
if (errno == ENOMEM) {
status = NT_STATUS_NO_MEMORY;
}
DBG_ERR("convert_string_talloc(CH_UTF16MUNGED, CH_UNIX) "
"failed for new_password of %s - %s\n",
domain, nt_errstr(status));
secrets_failed_password_change("localhost",
status,
NT_STATUS_NOT_COMMITTED,
info);
return ADS_ERROR_NT(status);
}
new_password = (const char *)new_pw_blob.data;
ret = kerberos_set_password(ads->auth.kdc_server, host_principal, password, host_principal, new_password, ads->auth.time_offset);
if (!ADS_ERR_OK(ret)) {
status = ads_ntstatus(ret);
DBG_ERR("kerberos_set_password(%s, %s) "
"failed for new_password of %s - %s\n",
ads->auth.kdc_server, host_principal,
domain, nt_errstr(status));
secrets_failed_password_change(ads->auth.kdc_server,
NT_STATUS_NOT_COMMITTED,
status,
info);
return ret;
}
status = secrets_finish_password_change(ads->auth.kdc_server, now, info);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1,("Failed to save machine password\n"));
return ADS_ERROR_NT(status);
}
return ADS_SUCCESS;
}
#endif
/**
* @brief Parses windows style SPN service/host:port/servicename
* serviceclass - A string that identifies the general class of service
* e.g. 'http'
* host - A netbios name or fully-qualified DNS name
* port - An optional TCP or UDP port number
* servicename - An optional distinguished name, GUID, DNS name or
* DNS name of an SRV or MX record. (not needed for host
* based services)
*
* @param[in] ctx - Talloc context.
* @param[in] srvprinc - The service principal
*
* @return - struct spn_struct containing the fields parsed or NULL
* if srvprinc could not be parsed.
*/
struct spn_struct *parse_spn(TALLOC_CTX *ctx, const char *srvprinc)
{
struct spn_struct * result = NULL;
char *tmp = NULL;
char *port_str = NULL;
char *host_str = NULL;
result = talloc_zero(ctx, struct spn_struct);
if (result == NULL) {
DBG_ERR("Out of memory\n");
return NULL;
}
result->serviceclass = talloc_strdup(result, srvprinc);
if (result->serviceclass == NULL) {
DBG_ERR("Out of memory\n");
goto fail;
}
result->port = -1;
tmp = strchr_m(result->serviceclass, '/');
if (tmp == NULL) {
/* illegal */
DBG_ERR("Failed to parse spn %s, no host definition\n",
srvprinc);
goto fail;
}
/* terminate service principal */
*tmp = '\0';
tmp++;
host_str = tmp;
tmp = strchr_m(host_str, ':');
if (tmp != NULL) {
*tmp = '\0';
tmp++;
port_str = tmp;
} else {
tmp = host_str;
}
tmp = strchr_m(tmp, '/');
if (tmp != NULL) {
*tmp = '\0';
tmp++;
result->servicename = tmp;
}
if (strlen(host_str) == 0) {
/* illegal */
DBG_ERR("Failed to parse spn %s, illegal host definition\n",
srvprinc);
goto fail;
}
result->host = host_str;
if (result->servicename != NULL && (strlen(result->servicename) == 0)) {
DBG_ERR("Failed to parse spn %s, empty servicename "
"definition\n", srvprinc);
goto fail;
}
if (port_str != NULL) {
if (strlen(port_str) == 0) {
DBG_ERR("Failed to parse spn %s, empty port "
"definition\n", srvprinc);
goto fail;
}
result->port = (int32_t)strtol(port_str, NULL, 10);
if (result->port <= 0
|| result->port > 65535
|| errno == ERANGE) {
DBG_ERR("Failed to parse spn %s, port number "
"conversion failed\n", srvprinc);
errno = 0;
goto fail;
}
}
return result;
fail:
TALLOC_FREE(result);
return NULL;
}
|
