source: trunk/include/samhain.h@ 428

Last change on this file since 428 was 415, checked in by katerina, 12 years ago

Fixes for tickets #314, #315, #316, #317, #318, #319, #320, and #321.
File size: 14.7 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#ifndef SAMHAIN_H
21#define SAMHAIN_H
22
23#include <sys/types.h>
24#include "slib.h"
25
26#ifdef SH_ENCRYPT
27#include "rijndael-api-fst.h"
28#endif
29
30/**************************************************
31 *
32 * STANDARD DEFINES
33 *
34 **************************************************/
35
36/* IPv6 */
37#if defined(HAVE_GETNAMEINFO) && defined(HAVE_GETADDRINFO)
38
39#if defined(SH_COMPILE_STATIC) && defined(__linux__)
40#undef USE_IPVX
41#define SH_SOCKMAX 1
42#else
43
44#if defined(USE_IPV4)
45#undef USE_IPVX
46#else
47#define USE_IPVX 1
48#endif
49
50#define SH_SOCKMAX 8
51#endif
52
53#else
54#undef USE_IPVX
55#define SH_SOCKMAX 1
56#endif
57
58/* end IPv6 */
59
60#define REPLACE_OLD
61
62/* Standard buffer sizes.
63 * IPv6 is 8 groups of 4 hex digits seperated by colons.
64 */
65#define SH_IP_BUF 48
66#define SH_MINIBUF 64
67#define SH_BUFSIZE 1024
68#define SH_MAXBUF 4096
69#define SH_PATHBUF 256
70#define SH_MSG_BUF 64512
71
72#define SH_ERRBUF_SIZE 64
73
74/* MAX_PATH_STORE must be >= KEY_LEN
75 */
76#define MAX_PATH_STORE 12287
77
78/* Sizes for arrays (user, group, timestamp).
79 */
80#define SOCKPASS_MAX 14
81#define USER_MAX 20
82#define GROUP_MAX 20
83#define TIM_MAX 32
84
85#define CMODE_SIZE 11
86
87#define ATTRBUF_SIZE 16
88#define ATTRBUF_USED 12
89
90/* The number of bytes in a key,
91 * the number of chars in its hex repesentation,
92 * and the block size of the hash algorithm.
93 */
94#define KEY_BYT 24
95#define KEY_LEN 48
96#define KEY_BLOCK 24
97#define KEYBUF_SIZE (KEY_LEN+1)
98
99/* The length of the compiled-in password.
100 */
101#define PW_LEN 8
102
103#undef GOOD
104#define GOOD 1
105#undef BAD
106#define BAD 0
107#undef ON
108#define ON 1
109#undef OFF
110#define OFF 0
111#undef S_TRUE
112#define S_TRUE 1
113#undef S_FALSE
114#define S_FALSE 0
115
116/* An unsigned integer guaranteed to be 32 bit.
117 */
118#if defined(HAVE_INT_32)
119#define UINT32 unsigned int
120#define SINT32 int
121#elif defined(HAVE_LONG_32)
122#define UINT32 unsigned long
123#define SINT32 long
124#elif defined(HAVE_SHORT_32)
125#define UINT32 unsigned short
126#define SINT32 short
127#else
128#error "No 32 bit integer type found"
129#endif
130
131#ifdef HAVE_INTTYPES_H
132#include <inttypes.h>
133#endif
134#ifdef HAVE_STDINT_H
135#include <stdint.h>
136#endif
137
138#if !defined(HAVE_UINT16_T)
139#define UINT16 unsigned short
140#else
141#define UINT16 uint16_t
142#endif
143
144#if !defined(HAVE_UINT64_T)
145
146#ifdef HAVE_LONG_LONG_64
147#define UINT64 unsigned long long
148#else
149#ifdef HAVE_LONG_64
150#define UINT64 unsigned long
151#else
152#error "no 64bit type found"
153#endif
154#endif
155
156#else
157#define UINT64 uint64_t
158#endif
159
160
161
162#define UBYTE unsigned char
163
164
165enum {
166 SH_CHECK_NONE = 0,
167 SH_CHECK_INIT = 1,
168 SH_CHECK_CHECK = 2
169};
170
171#define SH_MOD_THREAD 1
172#define SH_MOD_ACTIVE 0
173#define SH_MOD_FAILED -1
174#define SH_MOD_OFFSET 10
175
176/* Flags for file status
177 */
178#define SH_FFLAG_ALLIGNORE (1<<0)
179#define SH_FFLAG_VISITED (1<<1)
180#define SH_FFLAG_CHECKED (1<<3)
181#define SH_FFLAG_REPORTED (1<<3)
182#define SH_FFLAG_SUIDCHK (1<<4)
183
184#define SH_FFLAG_ALLIGNORE_SET(a) (((a) & SH_FFLAG_ALLIGNORE) != 0)
185#define SET_SH_FFLAG_ALLIGNORE(a) ((a) |= SH_FFLAG_ALLIGNORE)
186#define CLEAR_SH_FFLAG_ALLIGNORE(a) ((a) &= ~SH_FFLAG_ALLIGNORE)
187
188#define SH_FFLAG_VISITED_SET(a) (((a) & SH_FFLAG_VISITED) != 0)
189#define SET_SH_FFLAG_VISITED(a) ((a) |= SH_FFLAG_VISITED)
190#define CLEAR_SH_FFLAG_VISITED(a) ((a) &= ~SH_FFLAG_VISITED)
191
192#define SH_FFLAG_CHECKED_SET(a) (((a) & SH_FFLAG_VISITED) != 0)
193#define SET_SH_FFLAG_CHECKED(a) ((a) |= SH_FFLAG_VISITED)
194#define CLEAR_SH_FFLAG_CHECKED(a) ((a) &= ~SH_FFLAG_VISITED)
195
196#define SH_FFLAG_REPORTED_SET(a) (((a) & SH_FFLAG_REPORTED) != 0)
197#define SET_SH_FFLAG_REPORTED(a) ((a) |= SH_FFLAG_REPORTED)
198#define CLEAR_SH_FFLAG_REPORTED(a) ((a) &= ~SH_FFLAG_REPORTED)
199
200#define SH_FFLAG_SUIDCHK_SET(a) (((a) & SH_FFLAG_SUIDCHK) != 0)
201#define SET_SH_FFLAG_SUIDCHK(a) ((a) |= SH_FFLAG_SUIDCHK)
202#define CLEAR_SH_FFLAG_SUIDCHK(a) ((a) &= ~SH_FFLAG_SUIDCHK)
203
204/* Flags for inotify
205 */
206#define SH_INOTIFY_USE (1<<0)
207#define SH_INOTIFY_DOSCAN (1<<1)
208#define SH_INOTIFY_NEEDINIT (1<<2)
209#define SH_INOTIFY_INSCAN (1<<3)
210
211
212/**************************************************
213 *
214 * TYPEDEFS
215 *
216 **************************************************/
217
218enum {
219 SH_LEVEL_READONLY = 1,
220 SH_LEVEL_LOGFILES = 2,
221 SH_LEVEL_LOGGROW = 3,
222 SH_LEVEL_NOIGNORE = 4,
223 SH_LEVEL_ALLIGNORE = 5,
224 SH_LEVEL_ATTRIBUTES = 6,
225 SH_LEVEL_USER0 = 7,
226 SH_LEVEL_USER1 = 8,
227 SH_LEVEL_USER2 = 9,
228 SH_LEVEL_USER3 = 10,
229 SH_LEVEL_USER4 = 11,
230 SH_LEVEL_PRELINK = 12
231};
232
233typedef struct {
234 time_t alarm_interval;
235 time_t alarm_last;
236} sh_timer_t;
237
238typedef struct {
239 char path[SH_PATHBUF];
240 char hash[KEY_LEN+1];
241} sh_sh_df;
242
243typedef struct {
244 char user[USER_MAX];
245 char group[GROUP_MAX];
246 char home[SH_PATHBUF];
247 uid_t uid;
248 gid_t gid;
249} sh_sh_user;
250
251typedef struct {
252 char name[SH_PATHBUF]; /* local hostname */
253 char system[SH_MINIBUF]; /* system */
254 char release[SH_MINIBUF]; /* release */
255 char machine[SH_MINIBUF]; /* machine */
256} sh_sh_local;
257
258typedef struct {
259 char name[SH_PATHBUF];
260 char alt[SH_PATHBUF];
261} sh_sh_remote;
262
263typedef struct {
264 unsigned long bytes_hashed; /* bytes last check */
265 unsigned long bytes_speed; /* bytes/sec last check */
266 unsigned long mail_success; /* mails sent */
267 unsigned long mail_failed; /* mails not sent */
268 time_t time_start; /* start last check */
269 time_t time_check; /* time last check */
270 unsigned long dirs_checked; /* #dirs last check */
271 unsigned long files_checked; /* #files last check */
272 unsigned long files_report; /* #file reports */
273 unsigned long files_error; /* #file access error */
274 unsigned long files_nodir; /* #file not a directory*/
275} sh_sh_stat;
276
277typedef struct {
278 int exit; /* exit value */
279 int checkSum; /* whether to init/check checksums */
280 int update; /* update db */
281 int opts; /* reading cl options */
282 int started; /* finished with startup stuff */
283 int isdaemon; /* daemon or not */
284 int loop; /* go in loop even if not daemon */
285 int nice; /* desired nicety */
286 int isserver; /* server or not */
287 int islocked; /* BAD if logfile not locked */
288 int smsg; /* GOOD if end message sent */
289 int log_start; /* TRUE if new audit trail */
290 int reportonce; /* TRUE if bad files only once rep.*/
291 int fulldetail; /* TRUE if full details requested */
292 int client_severity; /* TRUE if client severity used */
293 int client_class; /* TRUE if client class used */
294 int audit;
295 unsigned long aud_mask;
296 int hidefile; /* TRUE if file not shown in log */
297 int inotify; /* Flags for inotify */
298} sh_sh_flag;
299
300typedef struct {
301
302 char prg_name[8];
303
304 UINT64 pid;
305
306 sh_sh_df exec;
307 sh_sh_df conf;
308 sh_sh_df data;
309
310 sh_sh_user real;
311 sh_sh_user effective;
312 sh_sh_user run;
313
314 sh_sh_local host;
315
316 sh_sh_remote srvtime;
317 sh_sh_remote srvmail;
318 sh_sh_remote srvexport;
319 sh_sh_remote srvcons;
320 sh_sh_remote srvlog;
321
322 sh_sh_stat statistics;
323 sh_sh_flag flag;
324
325#ifdef SH_STEALTH
326 unsigned long off_data;
327#endif
328
329 sh_timer_t mailNum;
330 sh_timer_t mailTime;
331 sh_timer_t fileCheck;
332
333 int looptime; /* timing for main loop */
334 /*@null@*//*@out@*/ char * timezone;
335
336#ifdef SCREW_IT_UP
337 int sigtrap_max_duration;
338#endif
339
340} sh_struct;
341
342
343extern volatile int sig_raised;
344extern volatile int sig_urgent;
345extern volatile int sig_debug_switch; /* SIGUSR1 */
346extern volatile int sig_suspend_switch; /* SIGUSR2 */
347extern volatile int sh_global_suspend_flag;
348extern volatile int sig_fresh_trail; /* SIGIOT */
349extern volatile int sh_thread_pause_flag;
350extern volatile int sig_config_read_again; /* SIGHUP */
351extern volatile int sig_terminate; /* SIGQUIT */
352extern volatile int sig_termfast; /* SIGTERM */
353extern volatile int sig_force_check; /* SIGTTOU */
354
355extern long int eintr__result;
356
357extern int sh_argc_store;
358extern char ** sh_argv_store;
359
360#include "sh_calls.h"
361
362
363typedef struct {
364 char sh_sockpass[2*SOCKPASS_MAX+2];
365 char sigkey_old[KEY_LEN+1];
366 char sigkey_new[KEY_LEN+1];
367 char mailkey_old[KEY_LEN+1];
368 char mailkey_new[KEY_LEN+1];
369 char crypt[KEY_LEN+1];
370 char session[KEY_LEN+1];
371 char vernam[KEY_LEN+1];
372 int mlock_failed;
373
374 char pw[PW_LEN];
375
376 char poolv[KEY_BYT];
377 int poolc;
378
379 int rngI;
380 UINT32 rng0[3];
381 UINT32 rng1[3];
382 UINT32 rng2[3];
383
384 UINT32 res_vec[6];
385
386 UINT32 ErrFlag[2];
387
388#ifdef SH_ENCRYPT
389 /*@out@*/ keyInstance keyInstE;
390 /*@out@*/ keyInstance keyInstD;
391#endif
392} sh_key_t;
393
394extern sh_struct sh;
395/*@null@*/ extern sh_key_t *skey;
396
397/**************************************************
398 *
399 * macros
400 *
401 **************************************************/
402
403#if defined(__GNUC__) && (__GNUC__ >= 4)
404#define SH_GNUC_SENTINEL __attribute__((__sentinel__))
405#else
406#define SH_GNUC_SENTINEL
407#endif
408
409#if defined(__GNUC__) && (__GNUC__ >= 3)
410#undef SH_GNUC_PURE
411#define SH_GNUC_PURE __attribute__((pure))
412#undef SH_GNUC_CONST
413#define SH_GNUC_CONST __attribute__((const))
414#undef SH_GNUC_NORETURN
415#define SH_GNUC_NORETURN __attribute__((noreturn))
416#undef SH_GNUC_MALLOC
417#define SH_GNUC_MALLOC __attribute__((malloc))
418#else
419#undef SH_GNUC_PURE
420#define SH_GNUC_PURE
421#undef SH_GNUC_CONST
422#define SH_GNUC_CONST
423#undef SH_GNUC_NORETURN
424#define SH_GNUC_NORETURN
425#undef SH_GNUC_MALLOC
426#define SH_GNUC_MALLOC
427#endif
428
429
430/* The semantics of the built-in are that it is expected that expr == const
431 * for __builtin_expect ((expr), const)
432 */
433#if defined(__GNUC__) && (__GNUC__ > 2) && defined(__OPTIMIZE__)
434#define SH_LIKELY(expr) (__builtin_expect((expr), 1))
435#define SH_UNLIKELY(expr) (__builtin_expect((expr), 0))
436#else
437#define SH_LIKELY(expr) (expr)
438#define SH_UNLIKELY(expr) (expr)
439#endif
440
441/* signal-safe log function
442 */
443int safe_logger (int thesignal, int method, char * details);
444void safe_fatal (const char * details, const char *f, int l);
445
446#define SH_VALIDATE_EQ(a,b) \
447 do { \
448 if ((a) != (b)) safe_fatal(#a " != " #b, FIL__, __LINE__);\
449 } while (0)
450
451#define SH_VALIDATE_NE(a,b) \
452 do { \
453 if ((a) == (b)) safe_fatal(#a " == " #b, FIL__, __LINE__);\
454 } while (0)
455
456#define SH_VALIDATE_GE(a,b) \
457 do { \
458 if ((a) < (b)) safe_fatal(#a " < " #b, FIL__, __LINE__);\
459 } while (0)
460
461#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
462#ifdef USE_SUID
463#define MLOCK(a, b) \
464 if ((skey != NULL) && skey->mlock_failed == SL_FALSE){ \
465 (void) sl_set_suid(); \
466 if (sh_unix_mlock(FIL__, __LINE__, a, b) < 0) skey->mlock_failed = SL_TRUE; \
467 (void) sl_unset_suid(); }
468#else
469#define MLOCK(a, b) \
470 if ((skey != NULL) && skey->mlock_failed == SL_FALSE){ \
471 if (sh_unix_mlock(FIL__, __LINE__, a, b) < 0) skey->mlock_failed = SL_TRUE; }
472#endif
473#else
474#define MLOCK(a, b) \
475 ;
476#endif
477
478#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
479#ifdef USE_SUID
480#define MUNLOCK(a, b) \
481 if ((skey != NULL) && skey->mlock_failed == SL_FALSE){ \
482 (void) sl_set_suid(); \
483 (void) sh_unix_munlock( a, b );\
484 (void) sl_unset_suid(); }
485#else
486#define MUNLOCK(a, b) \
487 if ((skey != NULL) && skey->mlock_failed == SL_FALSE){ \
488 (void) sh_unix_munlock( a, b ); }
489#endif
490#else
491#define MUNLOCK(a, b) \
492 ;
493#endif
494
495#ifdef SH_STEALTH
496void sh_do_encode (char * str, int len);
497#define sh_do_decode sh_do_encode
498#endif
499
500/* #if defined(SCREW_IT_UP)
501 * extern volatile int sh_not_traced;
502 * inline int sh_sigtrap_prepare();
503 * inline int sh_derr();
504 * #endif
505 */
506
507#if defined(SCREW_IT_UP) && (defined(__FreeBSD__) || defined(__linux__)) && defined(__i386__)
508#define BREAKEXIT(expr) \
509 do { \
510 int ixi; \
511 for (ixi = 0; ixi < 8; ++ixi) { \
512 if ((*(volatile unsigned *)((unsigned) expr + ixi) & 0xff) == 0xcc) \
513 _exit(EXIT_FAILURE); \
514 } \
515 } \
516 while (1 == 0)
517#else
518#define BREAKEXIT(expr)
519#endif
520
521
522
523#include "sh_cat.h"
524#include "sh_trace.h"
525#include "sh_mem.h"
526
527#endif
528
529/* CRIT: */
530/* NEW_CLIENT <client> */
531/* BAD_CLIENT <client> -- <details> */
532/* ERR_CLIENT <client> -- <details> */
533
534/* ALERT: */
535/* LOG_KEY samhain|yule <key> */
536/* STARTUP samhain|yule -- user <username> */
537/* EXIT samhain|yule */
538/* GOODSIG <file> <user> */
539/* FP_KEY <fingerprint> */
540/* GOODSIG_DAT <file> <user> */
541/* FP_KEY_DAT <fingerprint> */
542/* TIGER_CFG <file> <checksum> */
543/* TIGER_DAT <file> <checksum> */
544
545/* PANIC -- <details> */
546/* ERROR -- <details> */
547
548/* Policy */
549/* POLICY <code> <file> */
550/* <code> = MISSING || ADDED || NOT_A_DIRECTORY || <policy> */
551
552
553
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