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
|
/* pam_rootok module */
/*
* $Id: pam_rootok.c,v 1.8 2010/04/06 08:07:11 kukuk Exp $
*
* Written by Andrew Morgan <morgan@linux.kernel.org> 1996/3/11
*/
#include "config.h"
#include <stdio.h>
#include <unistd.h>
#include <syslog.h>
#include <stdarg.h>
#include <string.h>
/*
* here, we make a definition for the externally accessible function
* in this file (this definition is required for static a module
* but strongly encouraged generally) it is used to instruct the
* modules include file to define the function prototypes.
*/
#define PAM_SM_AUTH
#include <security/pam_modules.h>
#include <security/pam_ext.h>
#ifdef WITH_SELINUX
#include <selinux/selinux.h>
#include <selinux/av_permissions.h>
#endif
/* argument parsing */
#define PAM_DEBUG_ARG 01
static int
_pam_parse (const pam_handle_t *pamh, int argc, const char **argv)
{
int ctrl=0;
/* step through arguments */
for (ctrl=0; argc-- > 0; ++argv) {
/* generic options */
if (!strcmp(*argv,"debug"))
ctrl |= PAM_DEBUG_ARG;
else {
pam_syslog(pamh, LOG_ERR, "unknown option: %s", *argv);
}
}
return ctrl;
}
static int
check_for_root (pam_handle_t *pamh, int ctrl)
{
int retval = PAM_AUTH_ERR;
if (getuid() == 0)
#ifdef WITH_SELINUX
if (is_selinux_enabled()<1 || checkPasswdAccess(PASSWD__ROOTOK)==0)
#endif
retval = PAM_SUCCESS;
if (ctrl & PAM_DEBUG_ARG) {
pam_syslog(pamh, LOG_DEBUG, "root check %s",
(retval==PAM_SUCCESS) ? "succeeded" : "failed");
}
return retval;
}
/* --- management functions --- */
PAM_EXTERN int
pam_sm_authenticate (pam_handle_t *pamh, int flags UNUSED,
int argc, const char **argv)
{
int ctrl;
ctrl = _pam_parse(pamh, argc, argv);
return check_for_root (pamh, ctrl);
}
PAM_EXTERN int
pam_sm_setcred (pam_handle_t *pamh UNUSED, int flags UNUSED,
int argc UNUSED, const char **argv UNUSED)
{
return PAM_SUCCESS;
}
PAM_EXTERN int
pam_sm_acct_mgmt (pam_handle_t *pamh, int flags UNUSED,
int argc, const char **argv)
{
int ctrl;
ctrl = _pam_parse(pamh, argc, argv);
return check_for_root (pamh, ctrl);
}
PAM_EXTERN int
pam_sm_chauthtok (pam_handle_t *pamh, int flags UNUSED,
int argc, const char **argv)
{
int ctrl;
ctrl = _pam_parse(pamh, argc, argv);
return check_for_root (pamh, ctrl);
}
#ifdef PAM_STATIC
/* static module data */
struct pam_module _pam_rootok_modstruct = {
"pam_rootok",
pam_sm_authenticate,
pam_sm_setcred,
pam_sm_acct_mgmt,
NULL,
NULL,
pam_sm_chauthtok,
};
#endif
/* end of module definition */
|
