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
|
/*
* Copyright (c) 2001-2002 Andrew Morgan <morgan@kernel.org>
*
* <security/pam_modutil.h>
*
* This file is a list of handy libc wrappers that attempt to provide some
* thread-safe and other convenient functionality to modules in a common form.
*
* A number of these functions reserve space in a pam_[sg]et_data item.
* In all cases, the name of the item is prefixed with "pam_modutil_*".
*
* On systems that simply can't support thread safe programming, these
* functions don't support it either - sorry.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, and the entire permission notice in its entirety,
* including the disclaimer of warranties.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* ALTERNATIVELY, this product may be distributed under the terms of
* the GNU Public License, in which case the provisions of the GPL are
* required INSTEAD OF the above restrictions. (This clause is
* necessary due to a potential bad interaction between the GPL and
* the restrictions contained in a BSD-style copyright.)
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _SECURITY__PAM_MODUTIL_H
#define _SECURITY__PAM_MODUTIL_H
#include <sys/types.h>
#include <pwd.h>
#include <grp.h>
#include <shadow.h>
#ifdef __cplusplus
extern "C" {
#endif
#include <security/_pam_types.h>
extern struct passwd * PAM_NONNULL((1,2))
pam_modutil_getpwnam(pam_handle_t *pamh, const char *user);
extern struct passwd * PAM_NONNULL((1))
pam_modutil_getpwuid(pam_handle_t *pamh, uid_t uid);
extern struct group * PAM_NONNULL((1,2))
pam_modutil_getgrnam(pam_handle_t *pamh, const char *group);
extern struct group * PAM_NONNULL((1))
pam_modutil_getgrgid(pam_handle_t *pamh, gid_t gid);
extern struct spwd * PAM_NONNULL((1,2))
pam_modutil_getspnam(pam_handle_t *pamh, const char *user);
extern int PAM_NONNULL((1,2,3))
pam_modutil_user_in_group_nam_nam(pam_handle_t *pamh,
const char *user,
const char *group);
extern int PAM_NONNULL((1,2))
pam_modutil_user_in_group_nam_gid(pam_handle_t *pamh,
const char *user,
gid_t group);
extern int PAM_NONNULL((1,3))
pam_modutil_user_in_group_uid_nam(pam_handle_t *pamh,
uid_t user,
const char *group);
extern int PAM_NONNULL((1))
pam_modutil_user_in_group_uid_gid(pam_handle_t *pamh,
uid_t user,
gid_t group);
extern const char * PAM_NONNULL((1))
pam_modutil_getlogin(pam_handle_t *pamh);
extern int
pam_modutil_read(int fd, char *buffer, int count);
extern int
pam_modutil_write(int fd, const char *buffer, int count);
extern int PAM_NONNULL((1,3))
pam_modutil_audit_write(pam_handle_t *pamh, int type,
const char *message, int retval);
struct pam_modutil_privs {
gid_t *grplist;
int number_of_groups;
int allocated;
gid_t old_gid;
uid_t old_uid;
int is_dropped;
};
#define PAM_MODUTIL_NGROUPS 64
#define PAM_MODUTIL_DEF_PRIVS(n) \
gid_t n##_grplist[PAM_MODUTIL_NGROUPS]; \
struct pam_modutil_privs n = { n##_grplist, PAM_MODUTIL_NGROUPS, 0, -1, -1, 0 }
extern int PAM_NONNULL((1,2,3))
pam_modutil_drop_priv(pam_handle_t *pamh,
struct pam_modutil_privs *p,
const struct passwd *pw);
extern int PAM_NONNULL((1,2))
pam_modutil_regain_priv(pam_handle_t *pamh,
struct pam_modutil_privs *p);
#ifdef __cplusplus
}
#endif
#endif /* _SECURITY__PAM_MODUTIL_H */
|
