source: branches/samhain-2_2-branch/include/sh_unix.h@ 341

Last change on this file since 341 was 40, checked in by rainer, 18 years ago

Fix for tickets #13, #14, #15, #16, #17

File size: 9.0 KB
Line 
1/* SAMHAIN file system integrity testing */
2/* Copyright (C) 1999 Rainer Wichmann */
3/* */
4/* This program is free software; you can redistribute it */
5/* and/or modify */
6/* it under the terms of the GNU General Public License as */
7/* published by */
8/* the Free Software Foundation; either version 2 of the License, or */
9/* (at your option) any later version. */
10/* */
11/* This program is distributed in the hope that it will be useful, */
12/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
13/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
14/* GNU General Public License for more details. */
15/* */
16/* You should have received a copy of the GNU General Public License */
17/* along with this program; if not, write to the Free Software */
18/* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
19
20
21
22#ifndef SH_UNIX_H
23#define SH_UNIX_H
24
25#include <limits.h>
26#include <unistd.h>
27#include "samhain.h"
28#include "sh_error.h"
29
30
31typedef enum {
32 SH_ISLOG,
33 SH_ISFILE,
34 SH_ISDIR,
35 SH_ISDATA
36} ShOpenType;
37
38typedef enum {
39 SH_DATA_RAW,
40 SH_DATA_LINE
41} ShDataType;
42
43typedef enum {
44 SH_FILE_REGULAR,
45 SH_FILE_SYMLINK,
46 SH_FILE_DIRECTORY,
47 SH_FILE_CDEV,
48 SH_FILE_BDEV,
49 SH_FILE_FIFO,
50 SH_FILE_SOCKET,
51 SH_FILE_DOOR,
52 SH_FILE_PORT,
53 SH_FILE_UNKNOWN
54} ShFileType;
55
56/* -- Attributes to check. --
57 */
58
59/* checksum */
60#define MODI_CHK (1 << 0)
61/* link */
62#define MODI_LNK (1 << 1)
63/* inode */
64#define MODI_INO (1 << 2)
65/* user */
66#define MODI_USR (1 << 3)
67/* group */
68#define MODI_GRP (1 << 4)
69/* mtime */
70#define MODI_MTM (1 << 5)
71/* ctime */
72#define MODI_CTM (1 << 6)
73/* atime */
74#define MODI_ATM (1 << 7)
75/* size */
76#define MODI_SIZ (1 << 8)
77/* file mode */
78#define MODI_MOD (1 << 9)
79/* hardlinks */
80#define MODI_HLN (1 << 10)
81/* device type */
82#define MODI_RDEV (1 << 11)
83/* size may grow */
84#define MODI_SGROW (1 << 12)
85/* use prelink */
86#define MODI_PREL (1 << 13)
87
88#define MASK_ALLIGNORE_ 0
89extern unsigned long mask_ALLIGNORE;
90#define MASK_ATTRIBUTES_ (MODI_MOD|MODI_USR|MODI_GRP|MODI_RDEV)
91extern unsigned long mask_ATTRIBUTES;
92#define MASK_LOGFILES_ (MASK_ATTRIBUTES_|MODI_HLN|MODI_LNK|MODI_INO)
93extern unsigned long mask_LOGFILES;
94#define MASK_LOGGROW_ (MASK_LOGFILES_|MODI_SIZ|MODI_SGROW|MODI_CHK)
95extern unsigned long mask_LOGGROW;
96#define MASK_READONLY_ (MASK_LOGFILES_|MODI_CHK|MODI_SIZ|MODI_MTM|MODI_CTM)
97extern unsigned long mask_READONLY;
98#define MASK_NOIGNORE_ (MASK_LOGFILES_|MODI_CHK|MODI_SIZ|MODI_ATM|MODI_MTM)
99extern unsigned long mask_NOIGNORE;
100#define MASK_USER_ (MASK_READONLY_|MODI_ATM)
101extern unsigned long mask_USER0;
102extern unsigned long mask_USER1;
103extern unsigned long mask_USER2;
104extern unsigned long mask_USER3;
105extern unsigned long mask_USER4;
106/* like READONLY, but without MTM,CTM,SIZ,INO, abd with PREL)
107 */
108#define MASK_PRELINK_ (MASK_ATTRIBUTES_|MODI_HLN|MODI_LNK|MODI_CHK|MODI_PREL)
109extern unsigned long mask_PRELINK;
110
111typedef struct file_struct {
112 unsigned long check_mask;
113 int reported;
114 char fullpath[PATH_MAX];
115 ShFileType type;
116 dev_t dev;
117 ino_t ino;
118 mode_t mode;
119 nlink_t hardlinks;
120#if defined(__linux__) || defined(HAVE_STAT_FLAGS)
121 unsigned long attributes;
122 char c_attributes[16];
123#endif
124 char c_mode[11];
125 uid_t owner;
126 char c_owner[USER_MAX+2];
127 gid_t group;
128 char c_group[GROUP_MAX+2];
129 dev_t rdev;
130 off_t size;
131 unsigned long blksize;
132 unsigned long blocks;
133 time_t atime;
134 time_t mtime;
135 time_t ctime;
136
137 char linkpath[PATH_MAX];
138 mode_t linkmode;
139 char link_c_mode[11];
140 int linkisok;
141} file_type;
142
143/* mlock utilities
144 */
145int sh_unix_mlock(char * file, int line, void * addr, size_t len);
146int sh_unix_munlock(void * addr, size_t len);
147int sh_unix_count_mlock();
148/* public for unit tests */
149int sh_unix_pagesize();
150unsigned long sh_unix_lookup_page(void * in_addr, size_t len, int * num_pages);
151
152/* chroot directory
153 */
154int sh_unix_set_chroot(const char * str);
155
156/* whether to use localtime for file timesatams in logs
157 */
158int sh_unix_uselocaltime (const char * c);
159
160/* set I/O limit
161 */
162int sh_unix_set_io_limit (const char * c);
163void sh_unix_io_pause ();
164
165/* get file type
166 */
167int sh_unix_get_ftype(char * fullpath);
168
169/* reset masks for policies
170 */
171int sh_unix_maskreset();
172
173/* return true if database is remote
174 */
175int file_is_remote ();
176
177/* return the path to the configuration/database file
178 */
179char * file_path(char what, char flag);
180
181/* return current time as unsigned long
182 */
183unsigned long sh_unix_longtime (void);
184
185/* close all files >= fd, except possibly one
186 */
187void sh_unix_closeall (int fd, int except);
188
189
190/* write lock for filename
191 */
192int sh_unix_write_lock_file(char * filename);
193
194/* rm lock(s) for log file(s)
195 */
196int sh_unix_rm_lock_file(char * filename);
197
198/* write the PID file
199 */
200int sh_unix_write_pid_file();
201
202/* rm the PID file
203 */
204int sh_unix_rm_pid_file();
205
206
207/* checksum of own binary
208 */
209int sh_unix_self_hash (const char * c);
210
211/* return BAD on failure
212 */
213int sh_unix_self_check (void);
214
215/* add a trusted user to the list
216 */
217int tf_add_trusted_user(const char *);
218
219/* check a file
220 */
221int tf_trust_check (char * file, int mode);
222
223/* initialize group vector
224 */
225#ifdef HOST_IS_OSF
226int sh_unix_initgroups ( char * in_user, gid_t in_gid);
227#else
228int sh_unix_initgroups (const char * in_user, gid_t in_gid);
229#endif
230int sh_unix_initgroups2 (uid_t in_pid, gid_t in_gid);
231
232/* set the timeserver address
233 */
234int sh_unix_settimeserver (const char * address);
235void reset_count_dev_time(void);
236
237/* lock the key
238 */
239void sh_unix_memlock(void);
240
241/* deamon mode
242 */
243int sh_unix_setdeamon (const char * dummy);
244int sh_unix_setnodeamon(const char * dummy);
245
246/* Test whether file exists
247 */
248int sh_unix_file_stat(char * path);
249
250/* test whether file exists with proper attributes
251 */
252int sh_unix_file_exists(int fd);
253
254/* local host
255 */
256void sh_unix_localhost(void);
257
258/* check whether /proc exists and is a proc filesystem
259 */
260int sh_unix_test_proc(void);
261
262/* check whether a directory is secure
263 * (no symlink in path, not world-writeable)
264 */
265/* int sh_unix_is_secure_dir (ShErrLevel level, char * tmp); */
266
267/* obtain file info
268 */
269int sh_unix_getinfo (int level, char * filename, file_type * theFile,
270 char * fileHash, int flagrel);
271
272/* read file, return length read
273 */
274int sh_unix_getline (SL_TICKET fd, char * line, int sizeofline);
275
276/* call with goDaemon == 1 to make daemon process
277 */
278int sh_unix_init(int goDaemon);
279
280/* for local time use thetime = 0
281 */
282/*@owned@*/ char * sh_unix_time (time_t thetime);
283
284/* convert to GMT time
285 */
286char * sh_unix_gmttime (time_t thetime);
287
288/* effective user info
289 */
290int sh_unix_getUser (void);
291
292/* get home directory
293 */
294char * sh_unix_getUIDdir (int level, uid_t uid);
295
296
297#ifdef HAVE_GETTIMEOFDAY
298unsigned long sh_unix_notime (void);
299#endif
300
301/* check whether a directory
302 */
303int sh_unix_isdir (char * dirName, int level);
304
305#ifdef SH_STEALTH
306int sh_unix_getline_stealth (SL_TICKET fd, char * str, int len);
307void sh_unix_xor_code (char * str, int len);
308#endif
309
310#if defined(SCREW_IT_UP)
311/* for raise()
312 */
313#include <signal.h>
314#include <errno.h>
315
316void sh_sigtrap_handler (int signum);
317extern volatile int sh_not_traced;
318
319#ifdef HAVE_GETTIMEOFDAY
320#if TIME_WITH_SYS_TIME
321#include <sys/time.h>
322#include <time.h>
323#else
324#if HAVE_SYS_TIME_H
325#include <sys/time.h>
326#else
327#include <time.h>
328#endif
329#endif
330extern struct timeval save_tv;
331#endif
332
333static inline
334int sh_sigtrap_prepare()
335{
336 struct sigaction act_trap;
337 int val_retry;
338 act_trap.sa_handler = &sh_sigtrap_handler; /* signal action */
339 act_trap.sa_flags = 0; /* init sa_flags */
340 sigemptyset ( &act_trap.sa_mask ); /* set an empty mask */
341 do {
342 val_retry = sigaction(SIGTRAP, &act_trap, NULL);
343 } while (val_retry < 0 && errno == EINTR);
344 return 0;
345}
346
347/*@unused@*/ static inline
348int sh_derr(void)
349{
350 sh_not_traced = 0;
351
352#ifdef HAVE_GETTIMEOFDAY
353 gettimeofday(&save_tv, NULL);
354#endif
355
356#if defined(__linux__) && defined(__GNUC__) && defined(__i386__)
357 __asm__ __volatile__ ("int $0x03");
358#else
359 raise(SIGTRAP);
360#endif
361
362 if (sh_not_traced == 0)
363 _exit(5);
364 sh_not_traced = 0;
365 return (0);
366}
367
368#else
369
370/*@unused@*/ static inline
371int sh_derr(void)
372{
373 return 0;
374}
375/* #if defined(SCREW_IT_UP) */
376#endif
377
378#endif
379
380
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