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sudo/plugins/sudoers/sudoers.h
Todd C. Miller 985ab1dd3e Cache the user's group IDs and group names separately and only 
resolve group IDs -> names when needed.  If the sudoers file doesn't
contain groups we will no longer try to resolve all the user's group
IDs to names, which can be expensive on some systems.
2016-08-13 16:27:44 -06:00

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/*
* Copyright (c) 1993-1996, 1998-2005, 2007-2016
* Todd C. Miller <Todd.Miller@courtesan.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Sponsored in part by the Defense Advanced Research Projects
* Agency (DARPA) and Air Force Research Laboratory, Air Force
* Materiel Command, USAF, under agreement number F39502-99-1-0512.
*/
#ifndef SUDOERS_SUDOERS_H
#define SUDOERS_SUDOERS_H
#include <limits.h>
#ifdef HAVE_STDBOOL_H
# include <stdbool.h>
#else
# include "compat/stdbool.h"
#endif /* HAVE_STDBOOL_H */
#define DEFAULT_TEXT_DOMAIN "sudoers"
#include "sudo_gettext.h" /* must be included before sudo_compat.h */
#include <pathnames.h>
#include "sudo_compat.h"
#include "sudo_fatal.h"
#include "sudo_queue.h"
#include "defaults.h"
#include "logging.h"
#include "sudo_nss.h"
#include "sudo_plugin.h"
#include "sudo_conf.h"
#include "sudo_util.h"
#include "sudoers_debug.h"
/*
* Supplementary group IDs for a user.
*/
struct gid_list {
int ngids;
GETGROUPS_T *gids;
};
/*
* Supplementary group names for a user.
*/
struct group_list {
int ngroups;
char **groups;
};
/*
* Info pertaining to the invoking user.
*/
struct sudo_user {
struct passwd *pw;
struct passwd *_runas_pw;
struct group *_runas_gr;
struct stat *cmnd_stat;
char *name;
char *path;
char *tty;
char *ttypath;
char *host;
char *shost;
char *runhost;
char *srunhost;
char *prompt;
char *cmnd;
char *cmnd_args;
char *cmnd_base;
char *cmnd_safe;
char *class_name;
char *krb5_ccname;
struct gid_list *gid_list;
char * const * env_vars;
#ifdef HAVE_SELINUX
char *role;
char *type;
#endif
#ifdef HAVE_PRIV_SET
char *privs;
char *limitprivs;
#endif
const char *cwd;
char *iolog_file;
GETGROUPS_T *gids;
int execfd;
int ngids;
int closefrom;
int lines;
int cols;
int flags;
int max_groups;
mode_t umask;
uid_t uid;
uid_t gid;
pid_t sid;
};
/*
* sudo_user flag values
*/
#define RUNAS_USER_SPECIFIED 0x01
#define RUNAS_GROUP_SPECIFIED 0x02
/*
* Return values for sudoers_lookup(), also used as arguments for log_auth()
* Note: cannot use '0' as a value here.
*/
#define VALIDATE_ERROR 0x001
#define VALIDATE_SUCCESS 0x002
#define VALIDATE_FAILURE 0x004
#define FLAG_CHECK_USER 0x010
#define FLAG_NO_USER 0x020
#define FLAG_NO_HOST 0x040
#define FLAG_NO_CHECK 0x080
#define FLAG_NON_INTERACTIVE 0x100
#define FLAG_BAD_PASSWORD 0x200
#define FLAG_AUTH_ERROR 0x400
#define FLAG_NOPASSWD 0x800
/*
* find_path()/set_cmnd() return values
*/
#define FOUND 0
#define NOT_FOUND 1
#define NOT_FOUND_DOT 2
#define NOT_FOUND_ERROR 3
#define NOT_FOUND_PATH 4
/*
* Various modes sudo can be in (based on arguments) in hex
*/
#define MODE_RUN 0x00000001
#define MODE_EDIT 0x00000002
#define MODE_VALIDATE 0x00000004
#define MODE_INVALIDATE 0x00000008
#define MODE_KILL 0x00000010
#define MODE_VERSION 0x00000020
#define MODE_HELP 0x00000040
#define MODE_LIST 0x00000080
#define MODE_CHECK 0x00000100
#define MODE_ERROR 0x00000200
#define MODE_MASK 0x0000ffff
/* Mode flags */
#define MODE_BACKGROUND 0x00010000 /* XXX - unused */
#define MODE_SHELL 0x00020000
#define MODE_LOGIN_SHELL 0x00040000
#define MODE_IMPLIED_SHELL 0x00080000
#define MODE_RESET_HOME 0x00100000
#define MODE_PRESERVE_GROUPS 0x00200000
#define MODE_PRESERVE_ENV 0x00400000
#define MODE_NONINTERACTIVE 0x00800000
#define MODE_IGNORE_TICKET 0x01000000
/*
* Used with set_perms()
*/
#define PERM_INITIAL 0x00
#define PERM_ROOT 0x01
#define PERM_USER 0x02
#define PERM_FULL_USER 0x03
#define PERM_SUDOERS 0x04
#define PERM_RUNAS 0x05
#define PERM_TIMESTAMP 0x06
/*
* Shortcuts for sudo_user contents.
*/
#define user_name (sudo_user.name)
#define user_uid (sudo_user.uid)
#define user_gid (sudo_user.gid)
#define user_sid (sudo_user.sid)
#define user_umask (sudo_user.umask)
#define user_passwd (sudo_user.pw->pw_passwd)
#define user_dir (sudo_user.pw->pw_dir)
#define user_gids (sudo_user.gids)
#define user_ngids (sudo_user.ngids)
#define user_gid_list (sudo_user.gid_list)
#define user_tty (sudo_user.tty)
#define user_ttypath (sudo_user.ttypath)
#define user_cwd (sudo_user.cwd)
#define user_cmnd (sudo_user.cmnd)
#define user_args (sudo_user.cmnd_args)
#define user_base (sudo_user.cmnd_base)
#define user_stat (sudo_user.cmnd_stat)
#define user_path (sudo_user.path)
#define user_prompt (sudo_user.prompt)
#define user_host (sudo_user.host)
#define user_shost (sudo_user.shost)
#define user_runhost (sudo_user.runhost)
#define user_srunhost (sudo_user.srunhost)
#define user_ccname (sudo_user.krb5_ccname)
#define safe_cmnd (sudo_user.cmnd_safe)
#define cmnd_fd (sudo_user.execfd)
#define login_class (sudo_user.class_name)
#define runas_pw (sudo_user._runas_pw)
#define runas_gr (sudo_user._runas_gr)
#define user_role (sudo_user.role)
#define user_type (sudo_user.type)
#define user_closefrom (sudo_user.closefrom)
#define runas_privs (sudo_user.privs)
#define runas_limitprivs (sudo_user.limitprivs)
#ifdef __TANDEM
# define ROOT_UID 65535
#else
# define ROOT_UID 0
#endif
#define ROOT_GID 0
struct sudo_lbuf;
struct passwd;
struct stat;
struct timeval;
/*
* Function prototypes
*/
#define YY_DECL int sudoerslex(void)
/* goodpath.c */
bool sudo_goodpath(const char *path, struct stat *sbp);
/* findpath.c */
int find_path(const char *infile, char **outfile, struct stat *sbp,
const char *path, int ignore_dot, char * const *whitelist);
/* check.c */
int check_user(int validate, int mode);
bool user_is_exempt(void);
/* prompt.c */
char *expand_prompt(const char *old_prompt, const char *auth_user);
/* timestamp.c */
int timestamp_remove(bool unlinkit);
/* sudo_auth.c */
bool sudo_auth_needs_end_session(void);
int verify_user(struct passwd *pw, char *prompt, int validated, struct sudo_conv_callback *callback);
int sudo_auth_begin_session(struct passwd *pw, char **user_env[]);
int sudo_auth_end_session(struct passwd *pw);
int sudo_auth_init(struct passwd *pw);
int sudo_auth_cleanup(struct passwd *pw);
/* set_perms.c */
bool rewind_perms(void);
bool set_perms(int);
bool restore_perms(void);
int pam_prep_user(struct passwd *);
/* gram.y */
int sudoersparse(void);
extern char *login_style;
extern const char *errorfile;
extern int errorlineno;
extern bool parse_error;
extern bool sudoers_warnings;
/* toke.l */
YY_DECL;
extern FILE *sudoersin;
extern const char *sudoers_file;
extern char *sudoers;
extern mode_t sudoers_mode;
extern uid_t sudoers_uid;
extern gid_t sudoers_gid;
extern int sudolineno;
extern int last_token;
/* defaults.c */
void dump_defaults(void);
void dump_auth_methods(void);
/* getspwuid.c */
char *sudo_getepw(const struct passwd *);
/* sudo_nss.c */
int display_privs(struct sudo_nss_list *, struct passwd *);
int display_cmnd(struct sudo_nss_list *, struct passwd *);
/* pwutil.c */
__dso_public struct group *sudo_getgrgid(gid_t);
__dso_public struct group *sudo_getgrnam(const char *);
__dso_public void sudo_gr_addref(struct group *);
__dso_public void sudo_gr_delref(struct group *);
bool user_in_group(const struct passwd *, const char *);
struct group *sudo_fakegrnam(const char *);
struct gid_list *sudo_get_gidlist(const struct passwd *pw);
struct group_list *sudo_get_grlist(const struct passwd *pw);
struct passwd *sudo_fakepwnam(const char *, gid_t);
struct passwd *sudo_mkpwent(const char *user, uid_t uid, gid_t gid, const char *home, const char *shell);
struct passwd *sudo_getpwnam(const char *);
struct passwd *sudo_getpwuid(uid_t);
void sudo_endspent(void);
void sudo_freegrcache(void);
void sudo_freepwcache(void);
void sudo_gidlist_addref(struct gid_list *);
void sudo_gidlist_delref(struct gid_list *);
void sudo_grlist_addref(struct group_list *);
void sudo_grlist_delref(struct group_list *);
void sudo_pw_addref(struct passwd *);
void sudo_pw_delref(struct passwd *);
int sudo_set_gidlist(struct passwd *pw, char * const *gids);
int sudo_set_grlist(struct passwd *pw, char * const *groups);
void sudo_setspent(void);
/* timestr.c */
char *get_timestr(time_t, int);
/* boottime.c */
bool get_boottime(struct timespec *);
/* iolog.c */
bool io_nextid(char *iolog_dir, char *iolog_dir_fallback, char sessid[7]);
bool cb_maxseq(const union sudo_defs_val *sd_un);
/* iolog_path.c */
char *expand_iolog_path(const char *prefix, const char *dir, const char *file,
char **slashp);
/* env.c */
char **env_get(void);
bool env_merge(char * const envp[]);
bool env_swap_old(void);
bool env_init(char * const envp[]);
bool init_envtables(void);
bool insert_env_vars(char * const envp[]);
bool read_env_file(const char *, int);
bool rebuild_env(void);
bool validate_env_vars(char * const envp[]);
int sudo_setenv(const char *var, const char *val, int overwrite);
int sudo_unsetenv(const char *var);
char *sudo_getenv(const char *name);
int sudoers_hook_getenv(const char *name, char **value, void *closure);
int sudoers_hook_putenv(char *string, void *closure);
int sudoers_hook_setenv(const char *name, const char *value, int overwrite, void *closure);
int sudoers_hook_unsetenv(const char *name, void *closure);
/* sudoers.c */
FILE *open_sudoers(const char *, bool, bool *);
int sudoers_policy_init(void *info, char * const envp[]);
int sudoers_policy_main(int argc, char * const argv[], int pwflag, char *env_add[], void *closure);
void sudoers_cleanup(void);
extern struct sudo_user sudo_user;
extern struct passwd *list_pw;
extern int long_list;
extern int sudo_mode;
extern uid_t timestamp_uid;
extern sudo_conv_t sudo_conv;
extern sudo_printf_t sudo_printf;
/* sudoers_debug.c */
bool sudoers_debug_parse_flags(struct sudo_conf_debug_file_list *debug_files, const char *entry);
void sudoers_debug_register(const char *plugin_path, struct sudo_conf_debug_file_list *debug_files);
void sudoers_debug_deregister(void);
/* policy.c */
int sudoers_policy_deserialize_info(void *v, char **runas_user, char **runas_group);
int sudoers_policy_exec_setup(char *argv[], char *envp[], mode_t cmnd_umask, char *iolog_path, void *v);
extern const char *path_ldap_conf;
extern const char *path_ldap_secret;
/* group_plugin.c */
int group_plugin_load(char *plugin_info);
void group_plugin_unload(void);
int group_plugin_query(const char *user, const char *group,
const struct passwd *pwd);
bool cb_group_plugin(const union sudo_defs_val *sd_un);
extern const char *path_plugin_dir;
/* editor.c */
char *resolve_editor(const char *ed, size_t edlen, int nfiles, char **files,
int *argc_out, char ***argv_out, char * const *whitelist);
/* gc.c */
enum sudoers_gc_types {
GC_UNKNOWN,
GC_VECTOR,
GC_PTR
};
bool sudoers_gc_add(enum sudoers_gc_types type, void *ptr);
bool sudoers_gc_remove(enum sudoers_gc_types type, void *ptr);
void sudoers_gc_init(void);
#endif /* SUDOERS_SUDOERS_H */
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