1: /*
2: * Copyright (c) 1993-1996, 1998-2005, 2007-2014
3: * Todd C. Miller <Todd.Miller@courtesan.com>
4: *
5: * Permission to use, copy, modify, and distribute this software for any
6: * purpose with or without fee is hereby granted, provided that the above
7: * copyright notice and this permission notice appear in all copies.
8: *
9: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16: *
17: * Sponsored in part by the Defense Advanced Research Projects
18: * Agency (DARPA) and Air Force Research Laboratory, Air Force
19: * Materiel Command, USAF, under agreement number F39502-99-1-0512.
20: */
21:
22: #ifndef _SUDOERS_SUDOERS_H
23: #define _SUDOERS_SUDOERS_H
24:
25: #include <limits.h>
26: #ifdef HAVE_STDBOOL_H
27: # include <stdbool.h>
28: #else
29: # include "compat/stdbool.h"
30: #endif /* HAVE_STDBOOL_H */
31:
32: #define DEFAULT_TEXT_DOMAIN "sudoers"
33: #include "gettext.h" /* must be included before missing.h */
34:
35: #include <pathnames.h>
36: #include "missing.h"
37: #include "fatal.h"
38: #include "alloc.h"
39: #include "queue.h"
40: #include "fileops.h"
41: #include "defaults.h"
42: #include "logging.h"
43: #include "sudo_nss.h"
44: #include "sudo_plugin.h"
45: #include "sudo_debug.h"
46: #include "sudo_util.h"
47:
48: /*
49: * Password db and supplementary group IDs with associated group names.
50: */
51: struct group_list {
52: char **groups;
53: GETGROUPS_T *gids;
54: int ngroups;
55: int ngids;
56: };
57:
58: /*
59: * Info pertaining to the invoking user.
60: */
61: struct sudo_user {
62: struct passwd *pw;
63: struct passwd *_runas_pw;
64: struct group *_runas_gr;
65: struct stat *cmnd_stat;
66: char *name;
67: char *path;
68: char *tty;
69: char *ttypath;
70: char *host;
71: char *shost;
72: char *runhost;
73: char *srunhost;
74: char *prompt;
75: char *cmnd;
76: char *cmnd_args;
77: char *cmnd_base;
78: char *cmnd_safe;
79: char *class_name;
80: char *krb5_ccname;
81: struct group_list *group_list;
82: char * const * env_vars;
83: #ifdef HAVE_SELINUX
84: char *role;
85: char *type;
86: #endif
87: #ifdef HAVE_PRIV_SET
88: char *privs;
89: char *limitprivs;
90: #endif
91: const char *cwd;
92: char *iolog_file;
93: GETGROUPS_T *gids;
94: int ngids;
95: int closefrom;
96: int lines;
97: int cols;
98: int flags;
99: int max_groups;
100: mode_t umask;
101: uid_t uid;
102: uid_t gid;
103: pid_t sid;
104: };
105:
106: /*
107: * sudo_user flag values
108: */
109: #define RUNAS_USER_SPECIFIED 0x01
110: #define RUNAS_GROUP_SPECIFIED 0x02
111:
112: /*
113: * Return values for sudoers_lookup(), also used as arguments for log_auth()
114: * Note: cannot use '0' as a value here.
115: */
116: /* XXX - VALIDATE_SUCCESS and VALIDATE_FAILURE instead? */
117: #define VALIDATE_ERROR 0x001
118: #define VALIDATE_OK 0x002
119: #define VALIDATE_NOT_OK 0x004
120: #define FLAG_CHECK_USER 0x010
121: #define FLAG_NO_USER 0x020
122: #define FLAG_NO_HOST 0x040
123: #define FLAG_NO_CHECK 0x080
124: #define FLAG_NON_INTERACTIVE 0x100
125: #define FLAG_BAD_PASSWORD 0x200
126: #define FLAG_AUTH_ERROR 0x400
127:
128: /*
129: * find_path()/load_cmnd() return values
130: */
131: #define FOUND 0
132: #define NOT_FOUND 1
133: #define NOT_FOUND_DOT 2
134:
135: /*
136: * Various modes sudo can be in (based on arguments) in hex
137: */
138: #define MODE_RUN 0x00000001
139: #define MODE_EDIT 0x00000002
140: #define MODE_VALIDATE 0x00000004
141: #define MODE_INVALIDATE 0x00000008
142: #define MODE_KILL 0x00000010
143: #define MODE_VERSION 0x00000020
144: #define MODE_HELP 0x00000040
145: #define MODE_LIST 0x00000080
146: #define MODE_CHECK 0x00000100
147: #define MODE_LISTDEFS 0x00000200
148: #define MODE_MASK 0x0000ffff
149:
150: /* Mode flags */
151: #define MODE_BACKGROUND 0x00010000 /* XXX - unused */
152: #define MODE_SHELL 0x00020000
153: #define MODE_LOGIN_SHELL 0x00040000
154: #define MODE_IMPLIED_SHELL 0x00080000
155: #define MODE_RESET_HOME 0x00100000
156: #define MODE_PRESERVE_GROUPS 0x00200000
157: #define MODE_PRESERVE_ENV 0x00400000
158: #define MODE_NONINTERACTIVE 0x00800000
159: #define MODE_IGNORE_TICKET 0x01000000
160:
161: /*
162: * Used with set_perms()
163: */
164: #define PERM_INITIAL 0x00
165: #define PERM_ROOT 0x01
166: #define PERM_USER 0x02
167: #define PERM_FULL_USER 0x03
168: #define PERM_SUDOERS 0x04
169: #define PERM_RUNAS 0x05
170: #define PERM_TIMESTAMP 0x06
171: #define PERM_NOEXIT 0x10 /* flag */
172: #define PERM_MASK 0xf0
173:
174: /*
175: * Shortcuts for sudo_user contents.
176: */
177: #define user_name (sudo_user.name)
178: #define user_uid (sudo_user.uid)
179: #define user_gid (sudo_user.gid)
180: #define user_sid (sudo_user.sid)
181: #define user_umask (sudo_user.umask)
182: #define user_passwd (sudo_user.pw->pw_passwd)
183: #define user_dir (sudo_user.pw->pw_dir)
184: #define user_gids (sudo_user.gids)
185: #define user_ngids (sudo_user.ngids)
186: #define user_group_list (sudo_user.group_list)
187: #define user_tty (sudo_user.tty)
188: #define user_ttypath (sudo_user.ttypath)
189: #define user_cwd (sudo_user.cwd)
190: #define user_cmnd (sudo_user.cmnd)
191: #define user_args (sudo_user.cmnd_args)
192: #define user_base (sudo_user.cmnd_base)
193: #define user_stat (sudo_user.cmnd_stat)
194: #define user_path (sudo_user.path)
195: #define user_prompt (sudo_user.prompt)
196: #define user_host (sudo_user.host)
197: #define user_shost (sudo_user.shost)
198: #define user_runhost (sudo_user.runhost)
199: #define user_srunhost (sudo_user.srunhost)
200: #define user_ccname (sudo_user.krb5_ccname)
201: #define safe_cmnd (sudo_user.cmnd_safe)
202: #define login_class (sudo_user.class_name)
203: #define runas_pw (sudo_user._runas_pw)
204: #define runas_gr (sudo_user._runas_gr)
205: #define user_role (sudo_user.role)
206: #define user_type (sudo_user.type)
207: #define user_closefrom (sudo_user.closefrom)
208: #define runas_privs (sudo_user.privs)
209: #define runas_limitprivs (sudo_user.limitprivs)
210:
211: #ifdef __TANDEM
212: # define ROOT_UID 65535
213: #else
214: # define ROOT_UID 0
215: #endif
216: #define ROOT_GID 0
217:
218: struct lbuf;
219: struct passwd;
220: struct stat;
221: struct timeval;
222:
223: /*
224: * Function prototypes
225: */
226: #define YY_DECL int sudoerslex(void)
227:
228: /* goodpath.c */
229: bool sudo_goodpath(const char *, struct stat *);
230:
231: /* findpath.c */
232: int find_path(char *, char **, struct stat *, char *, int);
233:
234: /* check.c */
235: int check_user(int validate, int mode);
236: bool user_is_exempt(void);
237:
238: /* prompt.c */
239: char *expand_prompt(const char *old_prompt, const char *auth_user);
240:
241: /* timestamp.c */
242: void remove_timestamp(bool);
243: bool set_lectured(void);
244:
245: /* sudo_auth.c */
246: bool sudo_auth_needs_end_session(void);
247: int verify_user(struct passwd *pw, char *prompt, int validated);
248: int sudo_auth_begin_session(struct passwd *pw, char **user_env[]);
249: int sudo_auth_end_session(struct passwd *pw);
250: int sudo_auth_init(struct passwd *pw);
251: int sudo_auth_cleanup(struct passwd *pw);
252:
253: /* parse.c */
254: int sudo_file_open(struct sudo_nss *);
255: int sudo_file_close(struct sudo_nss *);
256: int sudo_file_setdefs(struct sudo_nss *);
257: int sudo_file_lookup(struct sudo_nss *, int, int);
258: int sudo_file_parse(struct sudo_nss *);
259: int sudo_file_display_cmnd(struct sudo_nss *, struct passwd *);
260: int sudo_file_display_defaults(struct sudo_nss *, struct passwd *, struct lbuf *);
261: int sudo_file_display_bound_defaults(struct sudo_nss *, struct passwd *, struct lbuf *);
262: int sudo_file_display_privs(struct sudo_nss *, struct passwd *, struct lbuf *);
263:
264: /* set_perms.c */
265: void rewind_perms(void);
266: int set_perms(int);
267: void restore_perms(void);
268: int pam_prep_user(struct passwd *);
269:
270: /* gram.y */
271: int sudoersparse(void);
272: extern char *login_style;
273: extern const char *errorfile;
274: extern int errorlineno;
275: extern bool parse_error;
276: extern bool sudoers_warnings;
277:
278: /* toke.l */
279: YY_DECL;
280: extern FILE *sudoersin;
281: extern const char *sudoers_file;
282: extern char *sudoers;
283: extern mode_t sudoers_mode;
284: extern uid_t sudoers_uid;
285: extern gid_t sudoers_gid;
286: extern int sudolineno;
287: extern int last_token;
288:
289: /* defaults.c */
290: void dump_defaults(void);
291: void dump_auth_methods(void);
292:
293: /* getspwuid.c */
294: char *sudo_getepw(const struct passwd *);
295:
296: /* sudo_nss.c */
297: void display_privs(struct sudo_nss_list *, struct passwd *);
298: bool display_cmnd(struct sudo_nss_list *, struct passwd *);
299:
300: /* pwutil.c */
301: __dso_public struct group *sudo_getgrgid(gid_t);
302: __dso_public struct group *sudo_getgrnam(const char *);
303: __dso_public void sudo_gr_addref(struct group *);
304: __dso_public void sudo_gr_delref(struct group *);
305: bool user_in_group(const struct passwd *, const char *);
306: struct group *sudo_fakegrnam(const char *);
307: struct group_list *sudo_get_grlist(const struct passwd *pw);
308: struct passwd *sudo_fakepwnam(const char *, gid_t);
309: struct passwd *sudo_mkpwent(const char *user, uid_t uid, gid_t gid, const char *home, const char *shell);
310: struct passwd *sudo_getpwnam(const char *);
311: struct passwd *sudo_getpwuid(uid_t);
312: void sudo_endgrent(void);
313: void sudo_endpwent(void);
314: void sudo_endspent(void);
315: void sudo_grlist_addref(struct group_list *);
316: void sudo_grlist_delref(struct group_list *);
317: void sudo_pw_addref(struct passwd *);
318: void sudo_pw_delref(struct passwd *);
319: void sudo_set_grlist(struct passwd *pw, char * const *groups,
320: char * const *gids);
321: void sudo_setgrent(void);
322: void sudo_setpwent(void);
323: void sudo_setspent(void);
324:
325: /* timestr.c */
326: char *get_timestr(time_t, int);
327:
328: /* boottime.c */
329: bool get_boottime(struct timeval *);
330:
331: /* iolog.c */
332: int io_set_max_sessid(const char *sessid);
333: void io_nextid(char *iolog_dir, char *iolog_dir_fallback, char sessid[7]);
334:
335: /* iolog_path.c */
336: char *expand_iolog_path(const char *prefix, const char *dir, const char *file,
337: char **slashp);
338:
339: /* env.c */
340: char **env_get(void);
341: void env_merge(char * const envp[]);
342: void env_init(char * const envp[]);
343: void init_envtables(void);
344: void insert_env_vars(char * const envp[]);
345: void read_env_file(const char *, int);
346: void rebuild_env(void);
347: void validate_env_vars(char * const envp[]);
348: int sudo_setenv(const char *var, const char *val, int overwrite);
349: int sudo_unsetenv(const char *var);
350: char *sudo_getenv(const char *name);
351: int sudoers_hook_getenv(const char *name, char **value, void *closure);
352: int sudoers_hook_putenv(char *string, void *closure);
353: int sudoers_hook_setenv(const char *name, const char *value, int overwrite, void *closure);
354: int sudoers_hook_unsetenv(const char *name, void *closure);
355:
356: /* sudoers.c */
357: FILE *open_sudoers(const char *, bool, bool *);
358: int sudoers_policy_init(void *info, char * const envp[]);
359: int sudoers_policy_main(int argc, char * const argv[], int pwflag, char *env_add[], void *closure);
360: void sudoers_cleanup(void);
361:
362: /* policy.c */
363: int sudoers_policy_deserialize_info(void *v, char **runas_user, char **runas_group);
364: int sudoers_policy_exec_setup(char *argv[], char *envp[], mode_t cmnd_umask, char *iolog_path, void *v);
365: extern const char *path_ldap_conf;
366: extern const char *path_ldap_secret;
367:
368: /* group_plugin.c */
369: int group_plugin_load(char *plugin_info);
370: void group_plugin_unload(void);
371: int group_plugin_query(const char *user, const char *group,
372: const struct passwd *pwd);
373:
374: #ifndef _SUDO_MAIN
375: extern struct sudo_user sudo_user;
376: extern struct passwd *list_pw;
377: extern int long_list;
378: extern int sudo_mode;
379: extern uid_t timestamp_uid;
380: extern sudo_conv_t sudo_conv;
381: #endif
382:
383: #endif /* _SUDOERS_SUDOERS_H */
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