source: openpam/trunk/lib/openpam_impl.h @ 594

Last change on this file since 594 was 594, checked in by Dag-Erling Smørgrav, 9 years ago

Add an experimental mechanism for enabling / disabling optional features.
Use it to control policy and module file checks. The default settings
correspond to the current behavior: disallow path separators in policy
names, but allow them in module names; verify ownership and permissions
for both policy files and modules.

  • Property svn:keywords set to Id
File size: 4.2 KB
Line 
1/*-
2 * Copyright (c) 2001-2003 Networks Associates Technology, Inc.
3 * Copyright (c) 2004-2011 Dag-Erling Smørgrav
4 * All rights reserved.
5 *
6 * This software was developed for the FreeBSD Project by ThinkSec AS and
7 * Network Associates Laboratories, the Security Research Division of
8 * Network Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
9 * ("CBOSS"), as part of the DARPA CHATS research program.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. The name of the author may not be used to endorse or promote
20 *    products derived from this software without specific prior written
21 *    permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * $Id: openpam_impl.h 594 2012-04-14 14:18:41Z des $
36 */
37
38#ifndef OPENPAM_IMPL_H_INCLUDED
39#define OPENPAM_IMPL_H_INCLUDED
40
41#include <security/openpam.h>
42
43extern int openpam_debug;
44
45/*
46 * Control flags
47 */
48typedef enum {
49        PAM_BINDING,
50        PAM_REQUIRED,
51        PAM_REQUISITE,
52        PAM_SUFFICIENT,
53        PAM_OPTIONAL,
54        PAM_NUM_CONTROL_FLAGS
55} pam_control_t;
56
57/*
58 * Facilities
59 */
60typedef enum {
61        PAM_FACILITY_ANY = -1,
62        PAM_AUTH = 0,
63        PAM_ACCOUNT,
64        PAM_SESSION,
65        PAM_PASSWORD,
66        PAM_NUM_FACILITIES
67} pam_facility_t;
68
69/*
70 * Module chains
71 */
72typedef struct pam_chain pam_chain_t;
73struct pam_chain {
74        pam_module_t    *module;
75        int              flag;
76        int              optc;
77        char           **optv;
78        pam_chain_t     *next;
79};
80
81/*
82 * Service policies
83 */
84#if defined(OPENPAM_EMBEDDED)
85typedef struct pam_policy pam_policy_t;
86struct pam_policy {
87        const char      *service;
88        pam_chain_t     *chains[PAM_NUM_FACILITIES];
89};
90extern pam_policy_t *pam_embedded_policies[];
91#endif
92
93/*
94 * Module-specific data
95 */
96typedef struct pam_data pam_data_t;
97struct pam_data {
98        char            *name;
99        void            *data;
100        void            (*cleanup)(pam_handle_t *, void *, int);
101        pam_data_t      *next;
102};
103
104/*
105 * PAM context
106 */
107struct pam_handle {
108        char            *service;
109
110        /* chains */
111        pam_chain_t     *chains[PAM_NUM_FACILITIES];
112        pam_chain_t     *current;
113        int              primitive;
114
115        /* items and data */
116        void            *item[PAM_NUM_ITEMS];
117        pam_data_t      *module_data;
118
119        /* environment list */
120        char           **env;
121        int              env_count;
122        int              env_size;
123};
124
125#ifdef NGROUPS_MAX
126/*
127 * Saved credentials
128 */
129#define PAM_SAVED_CRED "pam_saved_cred"
130struct pam_saved_cred {
131        uid_t    euid;
132        gid_t    egid;
133        gid_t    groups[NGROUPS_MAX];
134        int      ngroups;
135};
136#endif
137
138/*
139 * Default policy
140 */
141#define PAM_OTHER       "other"
142
143/*
144 * Internal functions
145 */
146int              openpam_configure(pam_handle_t *, const char *);
147int              openpam_dispatch(pam_handle_t *, int, int);
148int              openpam_findenv(pam_handle_t *, const char *, size_t);
149pam_module_t    *openpam_load_module(const char *);
150void             openpam_clear_chains(pam_chain_t **);
151
152int              openpam_check_desc_owner_perms(const char *, int);
153int              openpam_check_path_owner_perms(const char *);
154
155#ifdef OPENPAM_STATIC_MODULES
156pam_module_t    *openpam_static(const char *);
157#endif
158pam_module_t    *openpam_dynamic(const char *);
159
160#define FREE(p)                                 \
161        do {                                    \
162                free(p);                        \
163                (p) = NULL;                     \
164        } while (0)
165
166#define FREEV(c, v)                             \
167        do {                                    \
168                while (c) {                     \
169                        --(c);                  \
170                        FREE((v)[(c)]);         \
171                }                               \
172                FREE(v);                        \
173        } while (0)
174
175#include "openpam_constants.h"
176#include "openpam_debug.h"
177#include "openpam_features.h"
178
179#endif
Note: See TracBrowser for help on using the repository browser.