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      1 /*	$NetBSD: openpam_impl.h,v 1.4 2023/06/30 21:46:20 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2001-2003 Networks Associates Technology, Inc.
      5  * Copyright (c) 2004-2017 Dag-Erling Smrgrav
      6  * All rights reserved.
      7  *
      8  * This software was developed for the FreeBSD Project by ThinkSec AS and
      9  * Network Associates Laboratories, the Security Research Division of
     10  * Network Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
     11  * ("CBOSS"), as part of the DARPA CHATS research program.
     12  *
     13  * Redistribution and use in source and binary forms, with or without
     14  * modification, are permitted provided that the following conditions
     15  * are met:
     16  * 1. Redistributions of source code must retain the above copyright
     17  *    notice, this list of conditions and the following disclaimer.
     18  * 2. Redistributions in binary form must reproduce the above copyright
     19  *    notice, this list of conditions and the following disclaimer in the
     20  *    documentation and/or other materials provided with the distribution.
     21  * 3. The name of the author may not be used to endorse or promote
     22  *    products derived from this software without specific prior written
     23  *    permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     35  * SUCH DAMAGE.
     36  */
     37 
     38 #ifndef OPENPAM_IMPL_H_INCLUDED
     39 #define OPENPAM_IMPL_H_INCLUDED
     40 
     41 #include <security/openpam.h>
     42 
     43 extern int openpam_debug;
     44 
     45 /*
     46  * Control flags
     47  */
     48 typedef 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  */
     60 typedef 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  */
     72 typedef struct pam_chain pam_chain_t;
     73 struct 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)
     85 typedef struct pam_policy pam_policy_t;
     86 struct pam_policy {
     87 	const char	*service;
     88 	pam_chain_t	*chains[PAM_NUM_FACILITIES];
     89 };
     90 extern pam_policy_t *pam_embedded_policies[];
     91 #endif
     92 
     93 /*
     94  * Module-specific data
     95  */
     96 typedef struct pam_data pam_data_t;
     97 struct 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  */
    107 struct 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 	size_t		 env_count;
    122 	size_t		 env_size;
    123 };
    124 
    125 /*
    126  * Default policy
    127  */
    128 #define PAM_OTHER	"other"
    129 
    130 /*
    131  * Internal functions
    132  */
    133 int		 openpam_configure(pam_handle_t *, const char *)
    134 	OPENPAM_NONNULL((1));
    135 int		 openpam_dispatch(pam_handle_t *, int, int)
    136 	OPENPAM_NONNULL((1));
    137 int		 openpam_findenv(pam_handle_t *, const char *, size_t)
    138 	OPENPAM_NONNULL((1,2));
    139 pam_module_t	*openpam_load_module(const char *)
    140 	OPENPAM_NONNULL((1));
    141 void		 openpam_clear_chains(pam_chain_t **)
    142 	OPENPAM_NONNULL((1));
    143 
    144 int		 openpam_check_desc_owner_perms(const char *, int)
    145 	OPENPAM_NONNULL((1));
    146 int		 openpam_check_path_owner_perms(const char *)
    147 	OPENPAM_NONNULL((1));
    148 
    149 #ifdef OPENPAM_STATIC_MODULES
    150 pam_module_t	*openpam_static(const char *)
    151 	OPENPAM_NONNULL((1));
    152 #endif
    153 pam_module_t	*openpam_dynamic(const char *)
    154 	OPENPAM_NONNULL((1));
    155 
    156 #define	FREE(p)					\
    157 	do {					\
    158 		free(p);			\
    159 		(p) = NULL;			\
    160 	} while (/*CONSTCOND*/0)
    161 
    162 #define FREEV(c, v)				\
    163 	do {					\
    164 		if ((v) != NULL) {		\
    165 			while ((c)-- > 0)	\
    166 				FREE((v)[(c)]);	\
    167 			FREE(v);		\
    168 		}				\
    169 	} while (/*CONSTCOND*/0)
    170 
    171 #include "openpam_constants.h"
    172 #include "openpam_debug.h"
    173 #include "openpam_features.h"
    174 
    175 #endif
    176