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v1.9.14
plugins/sudoers/sudoers.h
482 строки
15 KB
Todd C. Miller
Move parser prototypes / externs from sudoers.h to parse.h or toke.h.
09 май 2023, 23:01
09 май 2023, 23:01
f352ef5
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/* * SPDX-License-Identifier: ISC * * Copyright (c) 1993-1996, 1998-2005, 2007-2022 * Todd C. Miller <Todd.Miller@sudo.ws> * * 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 <sys/types.h> /* for gid_t, mode_t, pid_t, size_t, uid_t */ #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 "pathnames.h" #include "sudo_compat.h" #include "sudo_conf.h" #include "sudo_eventlog.h" #include "sudo_fatal.h" #include "sudo_gettext.h" #include "sudo_nss.h" #include "sudo_plugin.h" #include "sudo_queue.h" #include "sudo_util.h" #include "sudoers_debug.h" #include "defaults.h" #include "logging.h" #include "parse.h" /* * Info passed in from the sudo front-end. */ struct sudoers_open_info { char * const *settings; char * const *user_info; char * const *plugin_args; }; /* * 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. * XXX - can we embed struct eventlog here or use it instead? */ struct sudo_user { struct timespec submit_time; struct passwd *pw; struct passwd *_runas_pw; struct group *_runas_gr; struct stat *cmnd_stat; char *cwd; char *name; char *runas_user; char *runas_group; char *path; char *tty; char *ttypath; char *host; char *shost; char *runhost; char *srunhost; char *runchroot; char *runcwd; char *prompt; char *cmnd; char *cmnd_args; char *cmnd_base; char *cmnd_dir; char *cmnd_list; char *cmnd_safe; char *cmnd_saved; 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_APPARMOR char *apparmor_profile; #endif #ifdef HAVE_PRIV_SET char *privs; char *limitprivs; #endif char *iolog_file; char *iolog_path; GETGROUPS_T *gids; int execfd; int ngids; int closefrom; int lines; int cols; int flags; int max_groups; int timeout; mode_t umask; uid_t uid; uid_t gid; pid_t sid; pid_t tcpgid; char uuid_str[37]; }; /* * sudo_get_gidlist() type values */ #define ENTRY_TYPE_ANY 0x00 #define ENTRY_TYPE_QUERIED 0x01 #define ENTRY_TYPE_FRONTEND 0x02 /* * sudo_user flag values */ #define RUNAS_USER_SPECIFIED 0x01 #define RUNAS_GROUP_SPECIFIED 0x02 #define CAN_INTERCEPT_SETID 0x04 #define HAVE_INTERCEPT_PTRACE 0x08 #define USER_INTERCEPT_SETID 0x10 /* * 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_NO_USER_INPUT 0x100 #define FLAG_BAD_PASSWORD 0x200 /* * 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_ASKPASS 0x00010000 #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 #define MODE_UPDATE_TICKET 0x02000000 #define MODE_POLICY_INTERCEPTED 0x04000000 /* Mode bits allowed for intercepted commands. */ #define MODE_INTERCEPT_MASK (MODE_RUN|MODE_NONINTERACTIVE|MODE_IGNORE_TICKET|MODE_POLICY_INTERCEPTED) /* * 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 #define PERM_IOLOG 0x07 /* * 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_tcpgid (sudo_user.tcpgid) #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_cmnd_dir (sudo_user.cmnd_dir) #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 list_cmnd (sudo_user.cmnd_list) #define safe_cmnd (sudo_user.cmnd_safe) #define saved_cmnd (sudo_user.cmnd_saved) #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_apparmor_profile (sudo_user.apparmor_profile) #define user_closefrom (sudo_user.closefrom) #define runas_privs (sudo_user.privs) #define runas_limitprivs (sudo_user.limitprivs) #define user_timeout (sudo_user.timeout) #define user_runchroot (sudo_user.runchroot) #define user_runcwd (sudo_user.runcwd) /* Default sudoers uid/gid/mode if not set by the Makefile. */ #ifndef SUDOERS_UID # define SUDOERS_UID 0 #endif #ifndef SUDOERS_GID # define SUDOERS_GID 0 #endif #ifndef SUDOERS_MODE # define SUDOERS_MODE 0600 #endif struct sudo_lbuf; struct passwd; struct stat; struct timespec; /* * Function prototypes */ /* 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 *allowlist); /* check.c */ int check_user(int validate, int mode); bool check_user_shell(const struct passwd *pw); 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 mode); int sudo_auth_approval(struct passwd *pw, int validated, bool exempt); int sudo_auth_cleanup(struct passwd *pw, bool force); /* set_perms.c */ bool rewind_perms(void); bool set_perms(int); bool restore_perms(void); int pam_prep_user(struct passwd *); /* defaults.c */ void dump_defaults(void); void dump_auth_methods(void); /* getspwuid.c */ char *sudo_getepw(const struct passwd *); /* pwutil.c */ typedef struct cache_item * (*sudo_make_pwitem_t)(uid_t uid, const char *user); typedef struct cache_item * (*sudo_make_gritem_t)(gid_t gid, const char *group); typedef struct cache_item * (*sudo_make_gidlist_item_t)(const struct passwd *pw, char * const *gids, unsigned int type); typedef struct cache_item * (*sudo_make_grlist_item_t)(const struct passwd *pw, char * const *groups); sudo_dso_public struct group *sudo_getgrgid(gid_t); sudo_dso_public struct group *sudo_getgrnam(const char *); sudo_dso_public void sudo_gr_addref(struct group *); sudo_dso_public void sudo_gr_delref(struct group *); bool user_in_group(const struct passwd *, const char *); struct group *sudo_fakegrnam(const char *); struct group *sudo_mkgrent(const char *group, gid_t gid, ...); struct gid_list *sudo_get_gidlist(const struct passwd *pw, unsigned int type); 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, unsigned int type); int sudo_set_grlist(struct passwd *pw, char * const *groups); void sudo_pwutil_set_backend(sudo_make_pwitem_t, sudo_make_gritem_t, sudo_make_gidlist_item_t, sudo_make_grlist_item_t); void sudo_setspent(void); /* timestr.c */ char *get_timestr(time_t, int); /* boottime.c */ bool get_boottime(struct timespec *); /* iolog.c */ bool cb_maxseq(const char *file, int line, int column, const union sudo_defs_val *sd_un, int op); bool cb_iolog_user(const char *file, int line, int column, const union sudo_defs_val *sd_un, int op); bool cb_iolog_group(const char *file, int line, int column, const union sudo_defs_val *sd_un, int op); bool cb_iolog_mode(const char *file, int line, int column, const union sudo_defs_val *sd_un, int op); /* iolog_path_escapes.c */ struct iolog_path_escape; extern const struct iolog_path_escape *sudoers_iolog_path_escapes; /* 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 *path, bool overwrite, bool restricted); 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); char *sudo_getenv_nodebug(const char *name); int sudo_putenv_nodebug(char *str, bool dupcheck, bool overwrite); int sudo_unsetenv_nodebug(const char *var); 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); void register_env_file(void * (*ef_open)(const char *), void (*ef_close)(void *), char * (*ef_next)(void *, int *), bool sys); /* env_pattern.c */ bool matches_env_pattern(const char *pattern, const char *var, bool *full_match); /* sudoers.c */ FILE *open_sudoers(const char *, char **, bool, bool *); bool cb_log_input(const char *file, int line, int column, const union sudo_defs_val *sd_un, int op); bool cb_log_output(const char *file, int line, int column, const union sudo_defs_val *sd_un, int op); int set_cmnd_path(const char *runchroot); int sudoers_init(void *info, sudoers_logger_t logger, char * const envp[]); int sudoers_check_cmnd(int argc, char *const argv[], char *env_add[], void *closure); int sudoers_list(int argc, char *const argv[], const char *list_user, bool verbose); int sudoers_validate_user(void); void sudoers_cleanup(void); bool sudoers_override_umask(void); void sudo_user_free(void); extern struct sudo_user sudo_user; extern struct passwd *list_pw; extern int sudo_mode; extern int sudoedit_nfiles; extern sudo_conv_t sudo_conv; extern sudo_printf_t sudo_printf; extern struct sudo_plugin_event * (*plugin_event_alloc)(void); /* sudoers_debug.c */ bool sudoers_debug_parse_flags(struct sudo_conf_debug_file_list *debug_files, const char *entry); bool 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, struct defaults_list *defaults); bool sudoers_policy_store_result(bool accepted, char *argv[], char *envp[], mode_t cmnd_umask, char *iolog_path, void *v); const struct sudoers_parser_config *policy_sudoers_conf(void); const char *policy_path_ldap_conf(void); const char *policy_path_ldap_secret(void); /* group_plugin.c */ int group_plugin_load(const 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 char *file, int line, int column, const union sudo_defs_val *sd_un, int op); extern const char *path_plugin_dir; /* editor.c */ char *find_editor(int nfiles, char * const *files, int *argc_out, char ***argv_out, char * const *allowlist, const char **env_editor); /* exptilde.c */ bool expand_tilde(char **path, const char *user); /* 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); void sudoers_gc_run(void); /* canon_path.c */ char *canon_path(const char *inpath); void canon_path_free(char *resolved); void canon_path_free_cache(void); /* strlcpy_unesc.c */ size_t strlcpy_unescape(char *dst, const char *src, size_t size); /* strvec_join.c */ char *strvec_join(char *const argv[], char sep, size_t (*cpy)(char *, const char *, size_t)); /* unesc_str.c */ void unescape_string(char *str); /* serialize_list.c */ char *serialize_list(const char *varname, struct list_members *members); /* pivot_root.c */ bool pivot_root(const char *new_root, int fds[2]); bool unpivot_root(int fds[2]); #endif /* SUDOERS_SUDOERS_H */