source: trunk/include/samhain.h@ 84

Last change on this file since 84 was 76, checked in by rainer, 18 years ago

Fix for ticket #38 (csv escaping) and #39 (building on cygwin). Also optimize a bit.
File size: 11.3 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#define REPLACE_OLD
37
38/* Standard buffer sizes.
39 */
40#define SH_MINIBUF 64
41#define SH_BUFSIZE 1024
42#define SH_MAXBUF 4096
43#define SH_PATHBUF 256
44
45/* Sizes for arrays (user, group, timestamp).
46 */
47#define SOCKPASS_MAX 14
48#define USER_MAX 20
49#define GROUP_MAX 20
50#define TIM_MAX 32
51
52
53/* The number of bytes in a key,
54 * the number of chars in its hex repesentation,
55 * and the block size of the hash algorithm.
56 */
57#define KEY_BYT 24
58#define KEY_LEN 48
59#define KEY_BLOCK 24
60
61/* The length of the compiled-in password.
62 */
63#define PW_LEN 8
64
65#undef GOOD
66#define GOOD 1
67#undef BAD
68#define BAD 0
69#undef ON
70#define ON 1
71#undef OFF
72#define OFF 0
73#undef S_TRUE
74#define S_TRUE 1
75#undef S_FALSE
76#define S_FALSE 0
77
78/* An unsigned integer guaranteed to be 32 bit.
79 */
80#if defined(HAVE_INT_32)
81#define UINT32 unsigned int
82#define SINT32 int
83#elif defined(HAVE_LONG_32)
84#define UINT32 unsigned long
85#define SINT32 long
86#elif defined(HAVE_SHORT_32)
87#define UINT32 unsigned short
88#define SINT32 short
89#endif
90
91#ifdef HAVE_INTTYPES_H
92#include <inttypes.h>
93#else
94#ifdef HAVE_STDINT_H
95#include <stdint.h>
96#endif
97#endif
98
99#if !defined(HAVE_INTTYPES_H) && !defined(HAVE_STDINT_H)
100
101#ifdef HAVE_LONG_LONG_64
102#define UINT64 unsigned long long
103#else
104#ifdef HAVE_LONG_64
105#define UINT64 unsigned long
106#else
107#define UINT64_IS_32
108#define UINT64 unsigned long
109#endif
110#endif
111
112#else
113#define UINT64 uint64_t
114#endif
115
116
117
118#define UBYTE unsigned char
119
120
121enum {
122 SH_CHECK_NONE = 0,
123 SH_CHECK_INIT = 1,
124 SH_CHECK_CHECK = 2
125};
126
127/**************************************************
128 *
129 * TYPEDEFS
130 *
131 **************************************************/
132
133enum {
134 SH_LEVEL_READONLY = 1,
135 SH_LEVEL_LOGFILES = 2,
136 SH_LEVEL_LOGGROW = 3,
137 SH_LEVEL_NOIGNORE = 4,
138 SH_LEVEL_ALLIGNORE = 5,
139 SH_LEVEL_ATTRIBUTES = 6,
140 SH_LEVEL_USER0 = 7,
141 SH_LEVEL_USER1 = 8,
142 SH_LEVEL_USER2 = 9,
143 SH_LEVEL_USER3 = 10,
144 SH_LEVEL_USER4 = 11,
145 SH_LEVEL_PRELINK = 12
146};
147
148typedef struct {
149 time_t alarm_interval;
150 time_t alarm_last;
151} sh_timer_t;
152
153typedef struct {
154 char path[SH_PATHBUF];
155 char hash[KEY_LEN+1];
156} sh_sh_df;
157
158typedef struct {
159 char user[USER_MAX];
160 char group[GROUP_MAX];
161 char home[SH_PATHBUF];
162 uid_t uid;
163 gid_t gid;
164} sh_sh_user;
165
166typedef struct {
167 char name[SH_PATHBUF]; /* local hostname */
168 char system[SH_MINIBUF]; /* system */
169 char release[SH_MINIBUF]; /* release */
170 char machine[SH_MINIBUF]; /* machine */
171} sh_sh_local;
172
173typedef struct {
174 char name[SH_PATHBUF];
175 char alt[SH_PATHBUF];
176} sh_sh_remote;
177
178typedef struct {
179 unsigned long bytes_hashed; /* bytes last check */
180 unsigned long bytes_speed; /* bytes/sec last check */
181 unsigned long mail_success; /* mails sent */
182 unsigned long mail_failed; /* mails not sent */
183 time_t time_start; /* start last check */
184 time_t time_check; /* time last check */
185 unsigned long dirs_checked; /* #dirs last check */
186 unsigned long files_checked; /* #files last check */
187} sh_sh_stat;
188
189typedef struct {
190 int exit; /* exit value */
191 int checkSum; /* whether to init/check checksums */
192 int update; /* update db */
193 int opts; /* reading cl options */
194 int isdaemon; /* daemon or not */
195 int loop; /* go in loop even if not daemon */
196 int nice; /* desired nicety */
197 int isserver; /* server or not */
198 int islocked; /* BAD if logfile not locked */
199 int smsg; /* GOOD if end message sent */
200 int log_start; /* TRUE if new audit trail */
201 int reportonce; /* TRUE if bad files only once rep.*/
202 int fulldetail; /* TRUE if full details requested */
203 int client_severity; /* TRUE if client severity used */
204 int client_class; /* TRUE if client class used */
205 int audit;
206 unsigned long aud_mask;
207 int hidefile; /* TRUE if file not reveled in log */
208} sh_sh_flag;
209
210typedef struct {
211
212 char prg_name[8];
213
214 sh_sh_df exec;
215 sh_sh_df conf;
216 sh_sh_df data;
217
218 sh_sh_user real;
219 sh_sh_user effective;
220 sh_sh_user run;
221
222 sh_sh_local host;
223
224 sh_sh_remote srvtime;
225 sh_sh_remote srvmail;
226 sh_sh_remote srvexport;
227 sh_sh_remote srvcons;
228 sh_sh_remote srvlog;
229
230 sh_sh_stat statistics;
231 sh_sh_flag flag;
232
233#ifdef SH_STEALTH
234 unsigned long off_data;
235#endif
236
237 sh_timer_t mailNum;
238 sh_timer_t mailTime;
239 sh_timer_t fileCheck;
240
241 int looptime; /* timing for main loop */
242 /*@null@*//*@out@*/ char * timezone;
243} sh_struct;
244
245
246extern volatile int sig_raised;
247extern volatile int sig_urgent;
248extern volatile int sig_debug_switch; /* SIGUSR1 */
249extern volatile int sig_suspend_switch; /* SIGUSR2 */
250extern volatile int sh_global_suspend_flag; /* SIGUSR2 */
251extern volatile int sig_fresh_trail; /* SIGIOT */
252extern volatile int sig_config_read_again; /* SIGHUP */
253extern volatile int sig_terminate; /* SIGQUIT */
254extern volatile int sig_termfast; /* SIGTERM */
255extern volatile int sig_force_check; /* SIGTTOU */
256
257extern long int eintr__result;
258
259extern int sh_argc_store;
260extern char ** sh_argv_store;
261
262#include "sh_calls.h"
263
264
265typedef struct {
266 char sh_sockpass[2*SOCKPASS_MAX+2];
267 char sigkey_old[KEY_LEN+1];
268 char sigkey_new[KEY_LEN+1];
269 char mailkey_old[KEY_LEN+1];
270 char mailkey_new[KEY_LEN+1];
271 char crypt[KEY_LEN+1];
272 char session[KEY_LEN+1];
273 char vernam[KEY_LEN+1];
274 int mlock_failed;
275
276 char pw[PW_LEN];
277
278 char poolv[KEY_BYT];
279 int poolc;
280
281 int rngI;
282 UINT32 rng0[3];
283 UINT32 rng1[3];
284 UINT32 rng2[3];
285
286 UINT32 ErrFlag[2];
287
288#ifdef SH_ENCRYPT
289 /*@out@*/ keyInstance keyInstE;
290 /*@out@*/ keyInstance keyInstD;
291#endif
292} sh_key_t;
293
294extern sh_struct sh;
295/*@null@*/ extern sh_key_t *skey;
296
297/**************************************************
298 *
299 * macros
300 *
301 **************************************************/
302
303#if defined(__GNUC__) && (__GNUC__ >= 4)
304#define SH_GNUC_NULL_TERMINATED __attribute__((__sentinel__))
305#else
306#define SH_GNUC_NULL_TERMINATED
307#endif
308
309/* The semantics of the built-in are that it is expected that expr == const
310 * for __builtin_expect ((expr), const)
311 */
312#if defined(__GNUC__) && (__GNUC__ > 2) && defined(__OPTIMIZE__)
313#define SH_LIKELY(expr) (__builtin_expect((expr), 1))
314#define SH_UNLIKELY(expr) (__builtin_expect((expr), 0))
315#else
316#define SH_LIKELY(expr) (expr)
317#define SH_UNLIKELY(expr) (expr)
318#endif
319
320/* signal-safe log function
321 */
322int safe_logger (int signal, int method, char * details);
323void safe_fatal (char * details, char *f, int l);
324
325#define SH_VALIDATE_EQ(a,b) \
326 do { \
327 if ((a) != (b)) safe_fatal(#a " != " #b, FIL__, __LINE__);\
328 } while (0)
329
330#define SH_VALIDATE_NE(a,b) \
331 do { \
332 if ((a) == (b)) safe_fatal(#a " == " #b, FIL__, __LINE__);\
333 } while (0)
334
335#define SH_VALIDATE_GE(a,b) \
336 do { \
337 if ((a) < (b)) safe_fatal(#a " < " #b, FIL__, __LINE__);\
338 } while (0)
339
340#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
341#define MLOCK(a, b) \
342 if ((skey != NULL) && skey->mlock_failed == SL_FALSE){ \
343 (void) sl_set_suid(); \
344 if (sh_unix_mlock(FIL__, __LINE__, a, b) < 0) skey->mlock_failed = SL_TRUE; \
345 (void) sl_unset_suid(); }
346#else
347#define MLOCK(a, b) \
348 ;
349#endif
350
351#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
352#define MUNLOCK(a, b) \
353 if ((skey != NULL) && skey->mlock_failed == SL_FALSE){ \
354 (void) sl_set_suid(); \
355 (void) sh_unix_munlock( a, b );\
356 (void) sl_unset_suid(); }
357#else
358#define MUNLOCK(a, b) \
359 ;
360#endif
361
362#ifdef SH_STEALTH
363void sh_do_encode (char * str, int len);
364#define sh_do_decode sh_do_encode
365#endif
366
367/* #if defined(SCREW_IT_UP)
368 * extern volatile int sh_not_traced;
369 * inline int sh_sigtrap_prepare();
370 * inline int sh_derr();
371 * #endif
372 */
373
374#if defined(SCREW_IT_UP) && (defined(__FreeBSD__) || defined(__linux__)) && defined(__i386__)
375#define BREAKEXIT(expr) \
376 do { \
377 int ixi; \
378 for (ixi = 0; ixi < 8; ++ixi) { \
379 if ((*(volatile unsigned *)((unsigned) expr + ixi) & 0xff) == 0xcc) \
380 _exit(EXIT_FAILURE); \
381 } \
382 } \
383 while (1 == 0)
384#else
385#define BREAKEXIT(expr)
386#endif
387
388
389
390#include "sh_cat.h"
391#include "sh_trace.h"
392#include "sh_mem.h"
393
394#endif
395
396/* CRIT: */
397/* NEW_CLIENT <client> */
398/* BAD_CLIENT <client> -- <details> */
399/* ERR_CLIENT <client> -- <details> */
400
401/* ALERT: */
402/* LOG_KEY samhain|yule <key> */
403/* STARTUP samhain|yule -- user <username> */
404/* EXIT samhain|yule */
405/* GOODSIG <file> <user> */
406/* FP_KEY <fingerprint> */
407/* GOODSIG_DAT <file> <user> */
408/* FP_KEY_DAT <fingerprint> */
409/* TIGER_CFG <file> <checksum> */
410/* TIGER_DAT <file> <checksum> */
411
412/* PANIC -- <details> */
413/* ERROR -- <details> */
414
415/* Policy */
416/* POLICY <code> <file> */
417/* <code> = MISSING || ADDED || NOT_A_DIRECTORY || <policy> */
418
419
420
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