/* SAMHAIN file system integrity testing */ /* Copyright (C) 1999 Rainer Wichmann */ /* */ /* This program is free software; you can redistribute it */ /* and/or modify */ /* it under the terms of the GNU General Public License as */ /* published by */ /* the Free Software Foundation; either version 2 of the License, or */ /* (at your option) any later version. */ /* */ /* This program is distributed in the hope that it will be useful, */ /* but WITHOUT ANY WARRANTY; without even the implied warranty of */ /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ /* GNU General Public License for more details. */ /* */ /* You should have received a copy of the GNU General Public License */ /* along with this program; if not, write to the Free Software */ /* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #ifndef SAMHAIN_H #define SAMHAIN_H #include #include "slib.h" #ifdef SH_ENCRYPT #include "rijndael-api-fst.h" #endif /************************************************** * * STANDARD DEFINES * **************************************************/ #define REPLACE_OLD /* Standard buffer sizes. */ #define SH_MINIBUF 64 #define SH_BUFSIZE 1024 #define SH_MAXBUF 4096 #define SH_PATHBUF 256 #define SH_ERRBUF_SIZE 64 /* Sizes for arrays (user, group, timestamp). */ #define SOCKPASS_MAX 14 #define USER_MAX 20 #define GROUP_MAX 20 #define TIM_MAX 32 #define CMODE_SIZE 11 #define ATTRBUF_SIZE 16 #define ATTRBUF_USED 12 /* The number of bytes in a key, * the number of chars in its hex repesentation, * and the block size of the hash algorithm. */ #define KEY_BYT 24 #define KEY_LEN 48 #define KEY_BLOCK 24 #define KEYBUF_SIZE (KEY_LEN+1) /* The length of the compiled-in password. */ #define PW_LEN 8 #undef GOOD #define GOOD 1 #undef BAD #define BAD 0 #undef ON #define ON 1 #undef OFF #define OFF 0 #undef S_TRUE #define S_TRUE 1 #undef S_FALSE #define S_FALSE 0 /* An unsigned integer guaranteed to be 32 bit. */ #if defined(HAVE_INT_32) #define UINT32 unsigned int #define SINT32 int #elif defined(HAVE_LONG_32) #define UINT32 unsigned long #define SINT32 long #elif defined(HAVE_SHORT_32) #define UINT32 unsigned short #define SINT32 short #endif #ifdef HAVE_INTTYPES_H #include #else #ifdef HAVE_STDINT_H #include #endif #endif #if !defined(HAVE_INTTYPES_H) && !defined(HAVE_STDINT_H) #ifdef HAVE_LONG_LONG_64 #define UINT64 unsigned long long #else #ifdef HAVE_LONG_64 #define UINT64 unsigned long #else #define UINT64_IS_32 #define UINT64 unsigned long #endif #endif #else #define UINT64 uint64_t #endif #define UBYTE unsigned char enum { SH_CHECK_NONE = 0, SH_CHECK_INIT = 1, SH_CHECK_CHECK = 2 }; #define SH_MOD_THREAD 1 #define SH_MOD_ACTIVE 0 #define SH_MOD_FAILED -1 /* Flags for file status */ #define SH_FFLAG_ALLIGNORE (1<<0) #define SH_FFLAG_VISITED (1<<1) #define SH_FFLAG_CHECKED (1<<3) #define SH_FFLAG_REPORTED (1<<3) #define SH_FFLAG_SUIDCHK (1<<4) #define SH_FFLAG_ALLIGNORE_SET(a) (((a) & SH_FFLAG_ALLIGNORE) != 0) #define SET_SH_FFLAG_ALLIGNORE(a) ((a) |= SH_FFLAG_ALLIGNORE) #define CLEAR_SH_FFLAG_ALLIGNORE(a) ((a) &= ~SH_FFLAG_ALLIGNORE) #define SH_FFLAG_VISITED_SET(a) (((a) & SH_FFLAG_VISITED) != 0) #define SET_SH_FFLAG_VISITED(a) ((a) |= SH_FFLAG_VISITED) #define CLEAR_SH_FFLAG_VISITED(a) ((a) &= ~SH_FFLAG_VISITED) #define SH_FFLAG_CHECKED_SET(a) (((a) & SH_FFLAG_VISITED) != 0) #define SET_SH_FFLAG_CHECKED(a) ((a) |= SH_FFLAG_VISITED) #define CLEAR_SH_FFLAG_CHECKED(a) ((a) &= ~SH_FFLAG_VISITED) #define SH_FFLAG_REPORTED_SET(a) (((a) & SH_FFLAG_REPORTED) != 0) #define SET_SH_FFLAG_REPORTED(a) ((a) |= SH_FFLAG_REPORTED) #define CLEAR_SH_FFLAG_REPORTED(a) ((a) &= ~SH_FFLAG_REPORTED) #define SH_FFLAG_SUIDCHK_SET(a) (((a) & SH_FFLAG_SUIDCHK) != 0) #define SET_SH_FFLAG_SUIDCHK(a) ((a) |= SH_FFLAG_SUIDCHK) #define CLEAR_SH_FFLAG_SUIDCHK(a) ((a) &= ~SH_FFLAG_SUIDCHK) /************************************************** * * TYPEDEFS * **************************************************/ enum { SH_LEVEL_READONLY = 1, SH_LEVEL_LOGFILES = 2, SH_LEVEL_LOGGROW = 3, SH_LEVEL_NOIGNORE = 4, SH_LEVEL_ALLIGNORE = 5, SH_LEVEL_ATTRIBUTES = 6, SH_LEVEL_USER0 = 7, SH_LEVEL_USER1 = 8, SH_LEVEL_USER2 = 9, SH_LEVEL_USER3 = 10, SH_LEVEL_USER4 = 11, SH_LEVEL_PRELINK = 12 }; typedef struct { time_t alarm_interval; time_t alarm_last; } sh_timer_t; typedef struct { char path[SH_PATHBUF]; char hash[KEY_LEN+1]; } sh_sh_df; typedef struct { char user[USER_MAX]; char group[GROUP_MAX]; char home[SH_PATHBUF]; uid_t uid; gid_t gid; } sh_sh_user; typedef struct { char name[SH_PATHBUF]; /* local hostname */ char system[SH_MINIBUF]; /* system */ char release[SH_MINIBUF]; /* release */ char machine[SH_MINIBUF]; /* machine */ } sh_sh_local; typedef struct { char name[SH_PATHBUF]; char alt[SH_PATHBUF]; } sh_sh_remote; typedef struct { unsigned long bytes_hashed; /* bytes last check */ unsigned long bytes_speed; /* bytes/sec last check */ unsigned long mail_success; /* mails sent */ unsigned long mail_failed; /* mails not sent */ time_t time_start; /* start last check */ time_t time_check; /* time last check */ unsigned long dirs_checked; /* #dirs last check */ unsigned long files_checked; /* #files last check */ } sh_sh_stat; typedef struct { int exit; /* exit value */ int checkSum; /* whether to init/check checksums */ int update; /* update db */ int opts; /* reading cl options */ int isdaemon; /* daemon or not */ int loop; /* go in loop even if not daemon */ int nice; /* desired nicety */ int isserver; /* server or not */ int islocked; /* BAD if logfile not locked */ int smsg; /* GOOD if end message sent */ int log_start; /* TRUE if new audit trail */ int reportonce; /* TRUE if bad files only once rep.*/ int fulldetail; /* TRUE if full details requested */ int client_severity; /* TRUE if client severity used */ int client_class; /* TRUE if client class used */ int audit; unsigned long aud_mask; int hidefile; /* TRUE if file not reveled in log */ } sh_sh_flag; typedef struct { char prg_name[8]; sh_sh_df exec; sh_sh_df conf; sh_sh_df data; sh_sh_user real; sh_sh_user effective; sh_sh_user run; sh_sh_local host; sh_sh_remote srvtime; sh_sh_remote srvmail; sh_sh_remote srvexport; sh_sh_remote srvcons; sh_sh_remote srvlog; sh_sh_stat statistics; sh_sh_flag flag; #ifdef SH_STEALTH unsigned long off_data; #endif sh_timer_t mailNum; sh_timer_t mailTime; sh_timer_t fileCheck; int looptime; /* timing for main loop */ /*@null@*//*@out@*/ char * timezone; } sh_struct; extern volatile int sig_raised; extern volatile int sig_urgent; extern volatile int sig_debug_switch; /* SIGUSR1 */ extern volatile int sig_suspend_switch; /* SIGUSR2 */ extern volatile int sh_global_suspend_flag; extern volatile int sig_fresh_trail; /* SIGIOT */ extern volatile int sh_thread_pause_flag; extern volatile int sig_config_read_again; /* SIGHUP */ extern volatile int sig_terminate; /* SIGQUIT */ extern volatile int sig_termfast; /* SIGTERM */ extern volatile int sig_force_check; /* SIGTTOU */ extern long int eintr__result; extern int sh_argc_store; extern char ** sh_argv_store; #include "sh_calls.h" typedef struct { char sh_sockpass[2*SOCKPASS_MAX+2]; char sigkey_old[KEY_LEN+1]; char sigkey_new[KEY_LEN+1]; char mailkey_old[KEY_LEN+1]; char mailkey_new[KEY_LEN+1]; char crypt[KEY_LEN+1]; char session[KEY_LEN+1]; char vernam[KEY_LEN+1]; int mlock_failed; char pw[PW_LEN]; char poolv[KEY_BYT]; int poolc; int rngI; UINT32 rng0[3]; UINT32 rng1[3]; UINT32 rng2[3]; UINT32 ErrFlag[2]; #ifdef SH_ENCRYPT /*@out@*/ keyInstance keyInstE; /*@out@*/ keyInstance keyInstD; #endif } sh_key_t; extern sh_struct sh; /*@null@*/ extern sh_key_t *skey; /************************************************** * * macros * **************************************************/ #if defined(__GNUC__) && (__GNUC__ >= 4) #define SH_GNUC_SENTINEL __attribute__((__sentinel__)) #else #define SH_GNUC_SENTINEL #endif #if defined(__GNUC__) && (__GNUC__ >= 3) #undef SH_GNUC_PURE #define SH_GNUC_PURE __attribute__((pure)) #undef SH_GNUC_CONST #define SH_GNUC_CONST __attribute__((const)) #undef SH_GNUC_NORETURN #define SH_GNUC_NORETURN __attribute__((noreturn)) #undef SH_GNUC_MALLOC #define SH_GNUC_MALLOC __attribute__((malloc)) #else #undef SH_GNUC_PURE #define SH_GNUC_PURE #undef SH_GNUC_CONST #define SH_GNUC_CONST #undef SH_GNUC_NORETURN #define SH_GNUC_NORETURN #undef SH_GNUC_MALLOC #define SH_GNUC_MALLOC #endif /* The semantics of the built-in are that it is expected that expr == const * for __builtin_expect ((expr), const) */ #if defined(__GNUC__) && (__GNUC__ > 2) && defined(__OPTIMIZE__) #define SH_LIKELY(expr) (__builtin_expect((expr), 1)) #define SH_UNLIKELY(expr) (__builtin_expect((expr), 0)) #else #define SH_LIKELY(expr) (expr) #define SH_UNLIKELY(expr) (expr) #endif /* signal-safe log function */ int safe_logger (int signal, int method, char * details); void safe_fatal (char * details, char *f, int l); #define SH_VALIDATE_EQ(a,b) \ do { \ if ((a) != (b)) safe_fatal(#a " != " #b, FIL__, __LINE__);\ } while (0) #define SH_VALIDATE_NE(a,b) \ do { \ if ((a) == (b)) safe_fatal(#a " == " #b, FIL__, __LINE__);\ } while (0) #define SH_VALIDATE_GE(a,b) \ do { \ if ((a) < (b)) safe_fatal(#a " < " #b, FIL__, __LINE__);\ } while (0) #if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK) #define MLOCK(a, b) \ if ((skey != NULL) && skey->mlock_failed == SL_FALSE){ \ (void) sl_set_suid(); \ if (sh_unix_mlock(FIL__, __LINE__, a, b) < 0) skey->mlock_failed = SL_TRUE; \ (void) sl_unset_suid(); } #else #define MLOCK(a, b) \ ; #endif #if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK) #define MUNLOCK(a, b) \ if ((skey != NULL) && skey->mlock_failed == SL_FALSE){ \ (void) sl_set_suid(); \ (void) sh_unix_munlock( a, b );\ (void) sl_unset_suid(); } #else #define MUNLOCK(a, b) \ ; #endif #ifdef SH_STEALTH void sh_do_encode (char * str, int len); #define sh_do_decode sh_do_encode #endif /* #if defined(SCREW_IT_UP) * extern volatile int sh_not_traced; * inline int sh_sigtrap_prepare(); * inline int sh_derr(); * #endif */ #if defined(SCREW_IT_UP) && (defined(__FreeBSD__) || defined(__linux__)) && defined(__i386__) #define BREAKEXIT(expr) \ do { \ int ixi; \ for (ixi = 0; ixi < 8; ++ixi) { \ if ((*(volatile unsigned *)((unsigned) expr + ixi) & 0xff) == 0xcc) \ _exit(EXIT_FAILURE); \ } \ } \ while (1 == 0) #else #define BREAKEXIT(expr) #endif #include "sh_cat.h" #include "sh_trace.h" #include "sh_mem.h" #endif /* CRIT: */ /* NEW_CLIENT */ /* BAD_CLIENT --
*/ /* ERR_CLIENT --
*/ /* ALERT: */ /* LOG_KEY samhain|yule */ /* STARTUP samhain|yule -- user */ /* EXIT samhain|yule */ /* GOODSIG */ /* FP_KEY */ /* GOODSIG_DAT */ /* FP_KEY_DAT */ /* TIGER_CFG */ /* TIGER_DAT */ /* PANIC --
*/ /* ERROR --
*/ /* Policy */ /* POLICY */ /* = MISSING || ADDED || NOT_A_DIRECTORY || */