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

/*-
 * Copyright (c) 2001-2003 Networks Associates Technology, Inc.
 * Copyright (c) 2004-2011 Dag-Erling Smørgrav
 * All rights reserved.
 *
 * This software was developed for the FreeBSD Project by ThinkSec AS and
 * Network Associates Laboratories, the Security Research Division of
 * Network Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
 * ("CBOSS"), as part of the DARPA CHATS research program.
 *
 * 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, this list of conditions and the following disclaimer.
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
 *
 * $Id: openpam_impl.h 594 2012-04-14 14:18:41Z des $
 */

#ifndef OPENPAM_IMPL_H_INCLUDED
#define OPENPAM_IMPL_H_INCLUDED

#include <security/openpam.h>

extern int openpam_debug;

/*
 * Control flags
 */
typedef enum {
        PAM_BINDING,
        PAM_REQUIRED,
        PAM_REQUISITE,
        PAM_SUFFICIENT,
        PAM_OPTIONAL,
        PAM_NUM_CONTROL_FLAGS
} pam_control_t;

/*
 * Facilities
 */
typedef enum {
        PAM_FACILITY_ANY = -1,
        PAM_AUTH = 0,
        PAM_ACCOUNT,
        PAM_SESSION,
        PAM_PASSWORD,
        PAM_NUM_FACILITIES
} pam_facility_t;

/*
 * Module chains
 */
typedef struct pam_chain pam_chain_t;
struct pam_chain {
        pam_module_t    *module;
        int              flag;
        int              optc;
        char           **optv;
        pam_chain_t     *next;
};

/*
 * Service policies
 */
#if defined(OPENPAM_EMBEDDED)
typedef struct pam_policy pam_policy_t;
struct pam_policy {
        const char      *service;
        pam_chain_t     *chains[PAM_NUM_FACILITIES];
};
extern pam_policy_t *pam_embedded_policies[];
#endif

/*
 * Module-specific data
 */
typedef struct pam_data pam_data_t;
struct pam_data {
        char            *name;
        void            *data;
        void            (*cleanup)(pam_handle_t *, void *, int);
        pam_data_t      *next;
};

/*
 * PAM context
 */
struct pam_handle {
        char            *service;

        /* chains */
        pam_chain_t     *chains[PAM_NUM_FACILITIES];
        pam_chain_t     *current;
        int              primitive;

        /* items and data */
        void            *item[PAM_NUM_ITEMS];
        pam_data_t      *module_data;

        /* environment list */
        char           **env;
        int              env_count;
        int              env_size;
};

#ifdef NGROUPS_MAX
/*
 * Saved credentials
 */
#define PAM_SAVED_CRED "pam_saved_cred"
struct pam_saved_cred {
        uid_t    euid;
        gid_t    egid;
        gid_t    groups[NGROUPS_MAX];
        int      ngroups;
};
#endif

/*
 * Default policy
 */
#define PAM_OTHER       "other"

/*
 * Internal functions
 */
int              openpam_configure(pam_handle_t *, const char *);
int              openpam_dispatch(pam_handle_t *, int, int);
int              openpam_findenv(pam_handle_t *, const char *, size_t);
pam_module_t    *openpam_load_module(const char *);
void             openpam_clear_chains(pam_chain_t **);

int              openpam_check_desc_owner_perms(const char *, int);
int              openpam_check_path_owner_perms(const char *);

#ifdef OPENPAM_STATIC_MODULES
pam_module_t    *openpam_static(const char *);
#endif
pam_module_t    *openpam_dynamic(const char *);

#define FREE(p)                                 \
        do {                                    \
                free(p);                        \
                (p) = NULL;                     \
        } while (0)

#define FREEV(c, v)                             \
        do {                                    \
                while (c) {                     \
                        --(c);                  \
                        FREE((v)[(c)]);         \
                }                               \
                FREE(v);                        \
        } while (0)

#include "openpam_constants.h"
#include "openpam_debug.h"
#include "openpam_features.h"

#endif