openpam_impl.h revision 236099 
1/*-
2 * Copyright (c) 2001-2003 Networks Associates Technology, Inc.
3 * Copyright (c) 2004-2011 Dag-Erling Sm��rgrav
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
180