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
|
/*
Unix SMB/CIFS implementation.
Authentication utility functions
Copyright (C) Simo Sorce 2010
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"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_AUTH
#ifdef HAVE_KRB5
NTSTATUS get_user_from_kerberos_info(TALLOC_CTX *mem_ctx,
const char *cli_name,
const char *princ_name,
struct PAC_LOGON_INFO *logon_info,
bool *is_mapped,
bool *mapped_to_guest,
char **ntuser,
char **ntdomain,
char **username,
struct passwd **_pw)
{
NTSTATUS status;
char *domain = NULL;
char *realm = NULL;
char *user = NULL;
char *p;
fstring fuser;
fstring unixuser;
struct passwd *pw = NULL;
DEBUG(3, ("Kerberos ticket principal name is [%s]\n", princ_name));
p = strchr_m(princ_name, '@');
if (!p) {
DEBUG(3, ("[%s] Doesn't look like a valid principal\n",
princ_name));
return NT_STATUS_LOGON_FAILURE;
}
user = talloc_strndup(mem_ctx, princ_name, p - princ_name);
if (!user) {
return NT_STATUS_NO_MEMORY;
}
realm = talloc_strdup(talloc_tos(), p + 1);
if (!realm) {
return NT_STATUS_NO_MEMORY;
}
if (!strequal(realm, lp_realm())) {
DEBUG(3, ("Ticket for foreign realm %s@%s\n", user, realm));
if (!lp_allow_trusted_domains()) {
return NT_STATUS_LOGON_FAILURE;
}
}
if (logon_info && logon_info->info3.base.domain.string) {
domain = talloc_strdup(mem_ctx,
logon_info->info3.base.domain.string);
if (!domain) {
return NT_STATUS_NO_MEMORY;
}
DEBUG(10, ("Domain is [%s] (using PAC)\n", domain));
} else {
/* If we have winbind running, we can (and must) shorten the
username by using the short netbios name. Otherwise we will
have inconsistent user names. With Kerberos, we get the
fully qualified realm, with ntlmssp we get the short
name. And even w2k3 does use ntlmssp if you for example
connect to an ip address. */
wbcErr wbc_status;
struct wbcDomainInfo *info = NULL;
DEBUG(10, ("Mapping [%s] to short name using winbindd\n",
realm));
wbc_status = wbcDomainInfo(realm, &info);
if (WBC_ERROR_IS_OK(wbc_status)) {
domain = talloc_strdup(mem_ctx,
info->short_name);
wbcFreeMemory(info);
} else {
DEBUG(3, ("Could not find short name: %s\n",
wbcErrorString(wbc_status)));
domain = talloc_strdup(mem_ctx, realm);
}
if (!domain) {
return NT_STATUS_NO_MEMORY;
}
DEBUG(10, ("Domain is [%s] (using Winbind)\n", domain));
}
/* We have to use fstring for this - map_username requires it. */
fstr_sprintf(fuser, "%s%c%s", domain, *lp_winbind_separator(), user);
*is_mapped = map_username(fuser);
pw = smb_getpwnam(mem_ctx, fuser, unixuser, true);
if (pw) {
/* if a real user check pam account restrictions */
/* only really perfomed if "obey pam restriction" is true */
/* do this before an eventual mapping to guest occurs */
status = smb_pam_accountcheck(pw->pw_name, cli_name);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("PAM account restrictions prevent user "
"[%s] login\n", unixuser));
return status;
}
}
if (!pw) {
/* this was originally the behavior of Samba 2.2, if a user
did not have a local uid but has been authenticated, then
map them to a guest account */
if (lp_map_to_guest() == MAP_TO_GUEST_ON_BAD_UID) {
*mapped_to_guest = true;
fstrcpy(fuser, lp_guestaccount());
pw = smb_getpwnam(mem_ctx, fuser, unixuser, true);
}
/* extra sanity check that the guest account is valid */
if (!pw) {
DEBUG(1, ("Username %s is invalid on this system\n",
fuser));
return NT_STATUS_LOGON_FAILURE;
}
}
*username = talloc_strdup(mem_ctx, unixuser);
if (!*username) {
return NT_STATUS_NO_MEMORY;
}
*ntuser = user;
*ntdomain = domain;
*_pw = pw;
return NT_STATUS_OK;
}
#else /* HAVE_KRB5 */
NTSTATUS get_user_from_kerberos_info(TALLOC_CTX *mem_ctx,
const char *cli_name,
const char *princ_name,
struct PAC_LOGON_INFO *logon_info,
bool *is_mapped,
bool *mapped_to_guest,
char **ntuser,
char **ntdomain,
char **username,
struct passwd **_pw)
{
return NT_STATUS_NOT_IMPLEMENTED;
}
#endif /* HAVE_KRB5 */
|
