source: trunk/include/samhain.h@ 131

Last change on this file since 131 was 131, checked in by rainer, 17 years ago

Use thread-safe libc functions.
File size: 12.5 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#define SH_GRBUF_SIZE 4096
46#define SH_PWBUF_SIZE 4096
47
48/* Sizes for arrays (user, group, timestamp).
49 */
50#define SOCKPASS_MAX 14
51#define USER_MAX 20
52#define GROUP_MAX 20
53#define TIM_MAX 32
54
55
56/* The number of bytes in a key,
57 * the number of chars in its hex repesentation,
58 * and the block size of the hash algorithm.
59 */
60#define KEY_BYT 24
61#define KEY_LEN 48
62#define KEY_BLOCK 24
63
64/* The length of the compiled-in password.
65 */
66#define PW_LEN 8
67
68#undef GOOD
69#define GOOD 1
70#undef BAD
71#define BAD 0
72#undef ON
73#define ON 1
74#undef OFF
75#define OFF 0
76#undef S_TRUE
77#define S_TRUE 1
78#undef S_FALSE
79#define S_FALSE 0
80
81/* An unsigned integer guaranteed to be 32 bit.
82 */
83#if defined(HAVE_INT_32)
84#define UINT32 unsigned int
85#define SINT32 int
86#elif defined(HAVE_LONG_32)
87#define UINT32 unsigned long
88#define SINT32 long
89#elif defined(HAVE_SHORT_32)
90#define UINT32 unsigned short
91#define SINT32 short
92#endif
93
94#ifdef HAVE_INTTYPES_H
95#include <inttypes.h>
96#else
97#ifdef HAVE_STDINT_H
98#include <stdint.h>
99#endif
100#endif
101
102#if !defined(HAVE_INTTYPES_H) && !defined(HAVE_STDINT_H)
103
104#ifdef HAVE_LONG_LONG_64
105#define UINT64 unsigned long long
106#else
107#ifdef HAVE_LONG_64
108#define UINT64 unsigned long
109#else
110#define UINT64_IS_32
111#define UINT64 unsigned long
112#endif
113#endif
114
115#else
116#define UINT64 uint64_t
117#endif
118
119
120
121#define UBYTE unsigned char
122
123
124enum {
125 SH_CHECK_NONE = 0,
126 SH_CHECK_INIT = 1,
127 SH_CHECK_CHECK = 2
128};
129
130/* Flags for file status
131 */
132#define SH_FFLAG_ALLIGNORE (1<<0)
133#define SH_FFLAG_VISITED (1<<1)
134#define SH_FFLAG_CHECKED (1<<3)
135#define SH_FFLAG_REPORTED (1<<3)
136#define SH_FFLAG_SUIDCHK (1<<4)
137
138#define SH_FFLAG_ALLIGNORE_SET(a) (((a) & SH_FFLAG_ALLIGNORE) != 0)
139#define SET_SH_FFLAG_ALLIGNORE(a) ((a) |= SH_FFLAG_ALLIGNORE)
140#define CLEAR_SH_FFLAG_ALLIGNORE(a) ((a) &= ~SH_FFLAG_ALLIGNORE)
141
142#define SH_FFLAG_VISITED_SET(a) (((a) & SH_FFLAG_VISITED) != 0)
143#define SET_SH_FFLAG_VISITED(a) ((a) |= SH_FFLAG_VISITED)
144#define CLEAR_SH_FFLAG_VISITED(a) ((a) &= ~SH_FFLAG_VISITED)
145
146#define SH_FFLAG_CHECKED_SET(a) (((a) & SH_FFLAG_VISITED) != 0)
147#define SET_SH_FFLAG_CHECKED(a) ((a) |= SH_FFLAG_VISITED)
148#define CLEAR_SH_FFLAG_CHECKED(a) ((a) &= ~SH_FFLAG_VISITED)
149
150#define SH_FFLAG_REPORTED_SET(a) (((a) & SH_FFLAG_REPORTED) != 0)
151#define SET_SH_FFLAG_REPORTED(a) ((a) |= SH_FFLAG_REPORTED)
152#define CLEAR_SH_FFLAG_REPORTED(a) ((a) &= ~SH_FFLAG_REPORTED)
153
154#define SH_FFLAG_SUIDCHK_SET(a) (((a) & SH_FFLAG_SUIDCHK) != 0)
155#define SET_SH_FFLAG_SUIDCHK(a) ((a) |= SH_FFLAG_SUIDCHK)
156#define CLEAR_SH_FFLAG_SUIDCHK(a) ((a) &= ~SH_FFLAG_SUIDCHK)
157
158
159
160/**************************************************
161 *
162 * TYPEDEFS
163 *
164 **************************************************/
165
166enum {
167 SH_LEVEL_READONLY = 1,
168 SH_LEVEL_LOGFILES = 2,
169 SH_LEVEL_LOGGROW = 3,
170 SH_LEVEL_NOIGNORE = 4,
171 SH_LEVEL_ALLIGNORE = 5,
172 SH_LEVEL_ATTRIBUTES = 6,
173 SH_LEVEL_USER0 = 7,
174 SH_LEVEL_USER1 = 8,
175 SH_LEVEL_USER2 = 9,
176 SH_LEVEL_USER3 = 10,
177 SH_LEVEL_USER4 = 11,
178 SH_LEVEL_PRELINK = 12
179};
180
181typedef struct {
182 time_t alarm_interval;
183 time_t alarm_last;
184} sh_timer_t;
185
186typedef struct {
187 char path[SH_PATHBUF];
188 char hash[KEY_LEN+1];
189} sh_sh_df;
190
191typedef struct {
192 char user[USER_MAX];
193 char group[GROUP_MAX];
194 char home[SH_PATHBUF];
195 uid_t uid;
196 gid_t gid;
197} sh_sh_user;
198
199typedef struct {
200 char name[SH_PATHBUF]; /* local hostname */
201 char system[SH_MINIBUF]; /* system */
202 char release[SH_MINIBUF]; /* release */
203 char machine[SH_MINIBUF]; /* machine */
204} sh_sh_local;
205
206typedef struct {
207 char name[SH_PATHBUF];
208 char alt[SH_PATHBUF];
209} sh_sh_remote;
210
211typedef struct {
212 unsigned long bytes_hashed; /* bytes last check */
213 unsigned long bytes_speed; /* bytes/sec last check */
214 unsigned long mail_success; /* mails sent */
215 unsigned long mail_failed; /* mails not sent */
216 time_t time_start; /* start last check */
217 time_t time_check; /* time last check */
218 unsigned long dirs_checked; /* #dirs last check */
219 unsigned long files_checked; /* #files last check */
220} sh_sh_stat;
221
222typedef struct {
223 int exit; /* exit value */
224 int checkSum; /* whether to init/check checksums */
225 int update; /* update db */
226 int opts; /* reading cl options */
227 int isdaemon; /* daemon or not */
228 int loop; /* go in loop even if not daemon */
229 int nice; /* desired nicety */
230 int isserver; /* server or not */
231 int islocked; /* BAD if logfile not locked */
232 int smsg; /* GOOD if end message sent */
233 int log_start; /* TRUE if new audit trail */
234 int reportonce; /* TRUE if bad files only once rep.*/
235 int fulldetail; /* TRUE if full details requested */
236 int client_severity; /* TRUE if client severity used */
237 int client_class; /* TRUE if client class used */
238 int audit;
239 unsigned long aud_mask;
240 int hidefile; /* TRUE if file not reveled in log */
241} sh_sh_flag;
242
243typedef struct {
244
245 char prg_name[8];
246
247 sh_sh_df exec;
248 sh_sh_df conf;
249 sh_sh_df data;
250
251 sh_sh_user real;
252 sh_sh_user effective;
253 sh_sh_user run;
254
255 sh_sh_local host;
256
257 sh_sh_remote srvtime;
258 sh_sh_remote srvmail;
259 sh_sh_remote srvexport;
260 sh_sh_remote srvcons;
261 sh_sh_remote srvlog;
262
263 sh_sh_stat statistics;
264 sh_sh_flag flag;
265
266#ifdef SH_STEALTH
267 unsigned long off_data;
268#endif
269
270 sh_timer_t mailNum;
271 sh_timer_t mailTime;
272 sh_timer_t fileCheck;
273
274 int looptime; /* timing for main loop */
275 /*@null@*//*@out@*/ char * timezone;
276} sh_struct;
277
278
279extern volatile int sig_raised;
280extern volatile int sig_urgent;
281extern volatile int sig_debug_switch; /* SIGUSR1 */
282extern volatile int sig_suspend_switch; /* SIGUSR2 */
283extern volatile int sh_global_suspend_flag; /* SIGUSR2 */
284extern volatile int sig_fresh_trail; /* SIGIOT */
285extern volatile int sig_config_read_again; /* SIGHUP */
286extern volatile int sig_terminate; /* SIGQUIT */
287extern volatile int sig_termfast; /* SIGTERM */
288extern volatile int sig_force_check; /* SIGTTOU */
289
290extern long int eintr__result;
291
292extern int sh_argc_store;
293extern char ** sh_argv_store;
294
295#include "sh_calls.h"
296
297
298typedef struct {
299 char sh_sockpass[2*SOCKPASS_MAX+2];
300 char sigkey_old[KEY_LEN+1];
301 char sigkey_new[KEY_LEN+1];
302 char mailkey_old[KEY_LEN+1];
303 char mailkey_new[KEY_LEN+1];
304 char crypt[KEY_LEN+1];
305 char session[KEY_LEN+1];
306 char vernam[KEY_LEN+1];
307 int mlock_failed;
308
309 char pw[PW_LEN];
310
311 char poolv[KEY_BYT];
312 int poolc;
313
314 int rngI;
315 UINT32 rng0[3];
316 UINT32 rng1[3];
317 UINT32 rng2[3];
318
319 UINT32 ErrFlag[2];
320
321#ifdef SH_ENCRYPT
322 /*@out@*/ keyInstance keyInstE;
323 /*@out@*/ keyInstance keyInstD;
324#endif
325} sh_key_t;
326
327extern sh_struct sh;
328/*@null@*/ extern sh_key_t *skey;
329
330/**************************************************
331 *
332 * macros
333 *
334 **************************************************/
335
336#if defined(__GNUC__) && (__GNUC__ >= 4)
337#define SH_GNUC_NULL_TERMINATED __attribute__((__sentinel__))
338#else
339#define SH_GNUC_NULL_TERMINATED
340#endif
341
342/* The semantics of the built-in are that it is expected that expr == const
343 * for __builtin_expect ((expr), const)
344 */
345#if defined(__GNUC__) && (__GNUC__ > 2) && defined(__OPTIMIZE__)
346#define SH_LIKELY(expr) (__builtin_expect((expr), 1))
347#define SH_UNLIKELY(expr) (__builtin_expect((expr), 0))
348#else
349#define SH_LIKELY(expr) (expr)
350#define SH_UNLIKELY(expr) (expr)
351#endif
352
353/* signal-safe log function
354 */
355int safe_logger (int signal, int method, char * details);
356void safe_fatal (char * details, char *f, int l);
357
358#define SH_VALIDATE_EQ(a,b) \
359 do { \
360 if ((a) != (b)) safe_fatal(#a " != " #b, FIL__, __LINE__);\
361 } while (0)
362
363#define SH_VALIDATE_NE(a,b) \
364 do { \
365 if ((a) == (b)) safe_fatal(#a " == " #b, FIL__, __LINE__);\
366 } while (0)
367
368#define SH_VALIDATE_GE(a,b) \
369 do { \
370 if ((a) < (b)) safe_fatal(#a " < " #b, FIL__, __LINE__);\
371 } while (0)
372
373#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
374#define MLOCK(a, b) \
375 if ((skey != NULL) && skey->mlock_failed == SL_FALSE){ \
376 (void) sl_set_suid(); \
377 if (sh_unix_mlock(FIL__, __LINE__, a, b) < 0) skey->mlock_failed = SL_TRUE; \
378 (void) sl_unset_suid(); }
379#else
380#define MLOCK(a, b) \
381 ;
382#endif
383
384#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
385#define MUNLOCK(a, b) \
386 if ((skey != NULL) && skey->mlock_failed == SL_FALSE){ \
387 (void) sl_set_suid(); \
388 (void) sh_unix_munlock( a, b );\
389 (void) sl_unset_suid(); }
390#else
391#define MUNLOCK(a, b) \
392 ;
393#endif
394
395#ifdef SH_STEALTH
396void sh_do_encode (char * str, int len);
397#define sh_do_decode sh_do_encode
398#endif
399
400/* #if defined(SCREW_IT_UP)
401 * extern volatile int sh_not_traced;
402 * inline int sh_sigtrap_prepare();
403 * inline int sh_derr();
404 * #endif
405 */
406
407#if defined(SCREW_IT_UP) && (defined(__FreeBSD__) || defined(__linux__)) && defined(__i386__)
408#define BREAKEXIT(expr) \
409 do { \
410 int ixi; \
411 for (ixi = 0; ixi < 8; ++ixi) { \
412 if ((*(volatile unsigned *)((unsigned) expr + ixi) & 0xff) == 0xcc) \
413 _exit(EXIT_FAILURE); \
414 } \
415 } \
416 while (1 == 0)
417#else
418#define BREAKEXIT(expr)
419#endif
420
421
422
423#include "sh_cat.h"
424#include "sh_trace.h"
425#include "sh_mem.h"
426
427#endif
428
429/* CRIT: */
430/* NEW_CLIENT <client> */
431/* BAD_CLIENT <client> -- <details> */
432/* ERR_CLIENT <client> -- <details> */
433
434/* ALERT: */
435/* LOG_KEY samhain|yule <key> */
436/* STARTUP samhain|yule -- user <username> */
437/* EXIT samhain|yule */
438/* GOODSIG <file> <user> */
439/* FP_KEY <fingerprint> */
440/* GOODSIG_DAT <file> <user> */
441/* FP_KEY_DAT <fingerprint> */
442/* TIGER_CFG <file> <checksum> */
443/* TIGER_DAT <file> <checksum> */
444
445/* PANIC -- <details> */
446/* ERROR -- <details> */
447
448/* Policy */
449/* POLICY <code> <file> */
450/* <code> = MISSING || ADDED || NOT_A_DIRECTORY || <policy> */
451
452
453
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