Context Navigation

source: trunk/src/sh_prelude.c@ 116

Last change on this file since 116 was 108, checked in by rainer, 17 years ago
Patch for sh_prelude (deinit, exit on failure if daemon), as requested by Yoann V.
File size: 31.9 KB

Rev	Line
[1]	1	/*
	2	*
	3	* Copyright (C) 2005 Yoann Vandoorselaere, Prelude IDS Technologies
	4	* Rainer Wichmann
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2, or (at your option)
	9	* 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; see the file COPYING. If not, write to
	18	* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
	19	*
	20	*/
	21
	22	/*
	23	* 28/04/2005 : R.W.:
	24	* move libprelude 0.8 code to seperate file
	25	*
	26	* 23/04/2005 : R.W.:
	27	* include libprelude 0.9 code from Yoann Vandoorselaere
	28	*/
[36]	29
	30
	31	/*
	32	* for strptime()
	33	*/
	34	#define _GNU_SOURCE 1
	35
[1]	36	#include "config_xor.h"
	37
	38	#include <stdio.h>
	39	#include <string.h>
	40	#include <sys/types.h>
	41
	42	#if TIME_WITH_SYS_TIME
	43
	44	# include <sys/time.h>
	45	# include <time.h>
	46
	47	#else
	48
	49	# if HAVE_SYS_TIME_H
	50	# include <sys/time.h>
	51	# else
	52	# include <time.h>
	53	# endif
	54
	55	#endif
	56
	57	#include <unistd.h>
	58	#include <syslog.h>
	59	#include <pwd.h>
	60
[20]	61	int sh_argc_store;
	62	char ** sh_argv_store;
	63
[1]	64	#if defined(HAVE_LIBPRELUDE) && defined(HAVE_LIBPRELUDE_9)
	65
	66
	67	/*
	68	* _() macros are samhain specific; they are used to replace string
	69	* constants at runtime. This is part of the samhain stealth mode
	70	* (fill string constants with encoded strings, decode at runtime).
	71	*/
	72	#define FIL__ _("sh_prelude.c")
	73
	74
	75	#include <libprelude/idmef.h>
	76	#include <libprelude/prelude.h>
	77
	78	/*
	79	* includes for samhain-specific functions (sl_strstr, sh_error_handle)
	80	*/
[108]	81	#include "samhain.h"
[1]	82	#include "sh_cat.h"
	83	#include "sh_error_min.h"
	84	#include "sh_prelude.h"
	85
	86	/*
	87	* When SH_USE_XML is set, value are formated using name="value".
	88	* Otherwise, value is formatted using the format name=<value>.
	89	*/
	90	#ifdef SH_USE_XML
	91	# define VALUE_DELIM_START '"'
	92	# define VALUE_DELIM_END '"'
	93	#else
	94	# define VALUE_DELIM_START '<'
	95	# define VALUE_DELIM_END '>'
	96	#endif
	97
	98	#define IDMEF_ANALYZER_MODEL _("Samhain")
	99	#define IDMEF_ANALYZER_CLASS _("Integrity Checker")
	100	#define IDMEF_ANALYZER_VERSION VERSION
[106]	101	#define IDMEF_ANALYZER_MANUFACTURER _("http://www.la-samhna.de/samhain/")
[1]	102
	103
	104
	105	/*
	106	* 0 = not initialized; -1 = failed; 1 = initialized
	107	*/
	108	static int initialized = 0;
	109	static int ready_for_init = 0;
	110
	111	static char *profile = NULL;
	112	static prelude_client_t *client = NULL;
	113
	114	static int severity_map[1 + (unsigned int) IDMEF_IMPACT_SEVERITY_HIGH] = {
	115	/* 0: unused (?) */ 0,
	116	/* 1: INFO */ 0,
	117	/* 2: LOW */ SH_ERR_ALL\|SH_ERR_INFO,
	118	/* 3: MEDIUM */ SH_ERR_NOTICE\|SH_ERR_WARN\|SH_ERR_STAMP\|SH_ERR_ERR,
	119	/* 4: HIGH */ SH_ERR_SEVERE\|SH_ERR_FATAL
	120	};
	121
	122	/* returns 0/tiger, 1/sha1, or 2/md5
	123	*/
	124	extern int sh_tiger_get_hashtype(void);
	125
	126	static void clear_and_set (int setpos, int flag)
	127	{
	128	unsigned int i;
	129	/* clear everywhere, and set at correct position */
	130	for (i = 1; i < (1 + (unsigned int) IDMEF_IMPACT_SEVERITY_HIGH); ++i)
	131	severity_map[i] &= ~flag;
	132	severity_map[setpos] \|= flag;
	133	return;
	134	}
	135
[22]	136	static int set_prelude_severity_int (const char * str, int prelude_sev)
[1]	137	{
[22]	138	char * p;
	139	char * dup = strdup (str);
[1]	140
[26]	141	if (!dup)
	142	return -1;
	143
[22]	144	p = strtok (dup, ", \t");
[1]	145	if (p) {
	146	do {
	147	if (0 == strcmp (p, _("alert")))
	148	clear_and_set (prelude_sev, SH_ERR_FATAL);
	149	else if (0 == strcmp (p, _("crit")))
	150	clear_and_set (prelude_sev, SH_ERR_SEVERE);
	151	else if (0 == strcmp (p, _("err")))
	152	clear_and_set (prelude_sev, SH_ERR_ERR);
	153	else if (0 == strcmp (p, _("mark")))
	154	clear_and_set (prelude_sev, SH_ERR_STAMP);
	155	else if (0 == strcmp (p, _("warn")))
	156	clear_and_set (prelude_sev, SH_ERR_WARN);
	157	else if (0 == strcmp (p, _("notice")))
	158	clear_and_set (prelude_sev, SH_ERR_NOTICE);
	159	else if (0 == strcmp (p, _("debug")))
	160	clear_and_set (prelude_sev, SH_ERR_ALL);
	161	else if (0 == strcmp (p, _("info")))
	162	clear_and_set (prelude_sev, SH_ERR_INFO);
[26]	163	else {
	164	free (dup);
[1]	165	return -1;
[26]	166	}
[1]	167	p = strtok (NULL, ", \t");
	168	} while (p);
	169	}
[22]	170	free(dup);
[1]	171	return 0;
	172	}
	173
[22]	174	int sh_prelude_map_info (const char * str)
[1]	175	{
	176	return (set_prelude_severity_int(str,(int)IDMEF_IMPACT_SEVERITY_INFO));
	177	}
[22]	178	int sh_prelude_map_low (const char * str)
[1]	179	{
	180	return (set_prelude_severity_int(str,(int)IDMEF_IMPACT_SEVERITY_LOW));
	181	}
[22]	182	int sh_prelude_map_medium (const char * str)
[1]	183	{
	184	return (set_prelude_severity_int(str,(int)IDMEF_IMPACT_SEVERITY_MEDIUM));
	185	}
[22]	186	int sh_prelude_map_high (const char * str)
[1]	187	{
	188	return (set_prelude_severity_int(str,(int)IDMEF_IMPACT_SEVERITY_HIGH));
	189	}
	190
	191	static idmef_impact_severity_t map_severity (int sam_sev)
	192	{
	193	int i;
	194	int max = 1 + (unsigned int) IDMEF_IMPACT_SEVERITY_HIGH;
	195	idmef_impact_severity_t retval = IDMEF_IMPACT_SEVERITY_MEDIUM;
	196
	197	for (i = 0; i < max; ++i) {
	198	if (severity_map[i] & sam_sev) {
	199	retval = (idmef_impact_severity_t) i;
	200	}
	201	}
	202	return retval;
	203	}
	204
	205	static char do_get_value(char ptr, char delim_start, char delim_end)
	206	{
	207	char *ret = NULL;
	208
	209	ptr = strchr(ptr, delim_start);
	210	if ( ! ptr )
	211	return NULL;
	212
	213	ret = ++ptr;
	214
	215	ptr = strchr(ptr, delim_end);
	216	if ( ! ptr )
	217	return NULL;
	218
	219	*ptr = '\0';
	220	ret = strdup(ret);
	221	*ptr = delim_end;
	222
	223	return ret;
	224	}
	225
	226
	227
	228	static char get_value(char msg, const char toktmp, const char toksuffix)
	229	{
	230	char *ptr, tok[128];
	231
	232	snprintf(tok, sizeof(tok), "%s%s=", toktmp, (toksuffix) ? toksuffix : "");
	233
	234	ptr = strstr(msg, tok);
	235	if ( ! ptr )
	236	return NULL;
	237
	238	return do_get_value(ptr, VALUE_DELIM_START, VALUE_DELIM_END);
	239	}
	240
	241
	242
	243	static char get_time_value(char msg, const char toktmp, const char toksuffix)
	244	{
	245
	246	char ret, ptr, tok[128];
	247
	248	snprintf(tok, sizeof(tok), "%s%s=", toktmp, (toksuffix) ? toksuffix : "");
	249
	250	ptr = strstr(msg, tok);
	251	if ( ! ptr )
	252	return NULL;
	253
	254	#ifndef SH_USE_XML
	255	ret = do_get_value(ptr, '[', ']');
	256	#else
	257	ret = do_get_value(ptr, VALUE_DELIM_START, VALUE_DELIM_END);
	258	#endif
	259
	260	return ret;
	261	}
	262
	263
	264
	265
	266	#if 0
	267	void debug_print_message(idmef_message_t *msg)
	268	{
	269	int ret;
	270	prelude_io_t *fd;
	271
	272	ret = prelude_io_new(&fd);
	273	if ( ret < 0 )
	274	return;
	275
	276	prelude_io_set_file_io(fd, stderr);
	277	idmef_message_print(idmef, fd);
	278
	279	prelude_io_destroy(fd);
	280	}
	281	#endif
	282
	283
	284
	285	static int idmef_time_from_samhain(idmef_time_t *time, const char str)
	286	{
	287	int ret;
	288	char *ptr;
	289	time_t utc;
	290	struct tm lt;
	291
	292	/*
	293	* Samhain stamp are encoded in UTC.
	294	*/
	295	ptr = strptime(str, _("%Y-%m-%dT%H:%M:%S"), &lt);
	296	if ( ! ptr ) {
	297	sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
	298	_("could not format Samhain time"), _("idmef_time_from_samhain"));
	299	return -1;
	300	}
	301
	302	utc = prelude_timegm(&lt);
	303
	304	ret = idmef_time_new_from_time(time, &utc);
	305	if ( ret < 0 )
	306	return ret;
	307
	308	return 0;
	309	}
	310
[22]	311	/* flawfinder: ignore // is part of name, not access() */
[1]	312	static void get_access_info(idmef_file_access_t access, char mode, int pos, int mpos)
	313	{
	314	int got = 0;
	315	int ret;
	316	prelude_string_t *str;
	317
	318	do {
	319	if ( mode[pos] == 'r' ) {
[22]	320	/* flawfinder: ignore // is part of name, not access() */
[26]	321	ret = idmef_file_access_new_permission(access, &str, IDMEF_LIST_APPEND);
[1]	322	if ( ret < 0 )
	323	return;
	324	prelude_string_set_dup(str, _("read"));
	325	++got;
	326	}
	327	else if ( mode[pos] == 'w' ) {
[22]	328	/* flawfinder: ignore // is part of name, not access() */
[26]	329	ret = idmef_file_access_new_permission(access, &str, IDMEF_LIST_APPEND);
[1]	330	if ( ret < 0 )
	331	return;
	332	prelude_string_set_dup(str, _("write"));
	333	++got;
	334	}
	335	else if ( mode[pos] == 'x' \|\| mode[pos] == 's' \|\| mode[pos] == 't') {
[22]	336	/* flawfinder: ignore // is part of name, not access() */
[26]	337	ret = idmef_file_access_new_permission(access, &str, IDMEF_LIST_APPEND);
[1]	338	if ( ret < 0 )
	339	return;
	340
	341	if ( mode[pos] == 'x' && mode[0] == 'd' )
	342	prelude_string_set_dup(str, _("search"));
	343
	344	else if ( mode[pos] == 'x' \|\| mode[pos] == 't' )
	345	prelude_string_set_dup(str, _("execute"));
	346
	347	else /* 's' */
	348	prelude_string_set_dup(str, _("executeAs"));
	349	++got;
	350	}
	351	++pos;
	352	} while (pos <= mpos);
	353
	354	if ( got == 0 ) {
[22]	355	/* flawfinder: ignore // is part of name, not access() */
[26]	356	ret = idmef_file_access_new_permission(access, &str, IDMEF_LIST_APPEND);
[1]	357	if ( ret < 0 )
	358	return;
	359	prelude_string_set_dup(str, _("noAccess"));
	360	}
	361	return;
	362	}
	363
	364
	365	static void get_file_infos(idmef_target_t target, char msg,
	366	idmef_file_category_t category)
	367	{
	368	int ret;
	369	int hashtype = 0;
	370	char *ptr;
	371	idmef_time_t *time;
	372	idmef_file_t *file;
	373	idmef_inode_t *inode;
	374	prelude_string_t *str;
	375	idmef_checksum_t *checksum;
[22]	376	idmef_file_access_t access; / flawfinder: ignore */
[1]	377	idmef_user_id_t *userid;
	378	const char *suffix = (category == IDMEF_FILE_CATEGORY_CURRENT) ? "_new" : "_old";
	379	char *mode = NULL;
	380
[26]	381	ret = idmef_target_new_file(target, &file, IDMEF_LIST_APPEND);
[1]	382	if ( ret < 0 )
	383	return;
	384	idmef_file_set_category(file, category);
	385
	386	ptr = get_value(msg, _("path"), NULL);
	387	if ( ptr ) {
	388	/*
	389	* In term of IDMEF, this is the full path,
	390	* including the name.
	391	*/
	392	ret = idmef_file_new_path(file, &str);
[36]	393	if ( ret < 0 ) {
	394	free(ptr);
[1]	395	return;
[36]	396	}
[1]	397	prelude_string_set_nodup(str, ptr);
	398
	399	ptr = strrchr(ptr, '/');
	400	if ( ptr ) {
	401	ret = idmef_file_new_name(file, &str);
[40]	402	if ( ret == 0 ) {
	403	prelude_string_set_dup(str, ptr + 1);
	404	}
[1]	405	}
	406	}
	407
	408	ptr = get_value(msg, _("size"), suffix);
	409	if ( ptr ) {
	410	idmef_file_set_data_size(file, strtoul(ptr, NULL, 10));
	411	free(ptr);
	412	}
	413
	414	ptr = get_time_value(msg, _("mtime"), suffix);
	415	if ( ptr ) {
	416	ret = idmef_time_from_samhain(&time, ptr);
[40]	417	if ( ret == 0 ) {
	418	idmef_file_set_modify_time(file, time);
[36]	419	}
[1]	420	free(ptr);
	421	}
	422
	423	ptr = get_time_value(msg, _("ctime"), suffix);
	424	if ( ptr ) {
	425	ret = idmef_time_from_samhain(&time, ptr);
[40]	426	if ( ret == 0 ) {
	427	idmef_file_set_create_time(file, time);
[36]	428	}
[1]	429	free(ptr);
	430	}
	431
	432	ptr = get_value(msg, _("inode"), suffix);
	433	if ( ptr ) {
	434	ret = idmef_file_new_inode(file, &inode);
[40]	435	if ( ret == 0 ) {
	436	char * dev = get_value(msg, _("dev"), suffix);
	437	if (dev) {
	438	char * q = strchr(dev, ',');
	439	if (*q) {
	440	*q = '\0'; ++q;
	441	idmef_inode_set_major_device(inode, strtoul(dev, NULL, 0));
	442	idmef_inode_set_minor_device(inode, strtoul( q, NULL, 0));
	443	}
	444	free(dev);
	445	}
	446	idmef_inode_set_number(inode, strtoul(ptr, NULL, 10));
[36]	447	}
[1]	448	free(ptr);
	449	}
	450
	451	ptr = get_value(msg, _("chksum"), suffix);
	452	if ( ptr ) {
[26]	453	ret = idmef_file_new_checksum(file, &checksum, IDMEF_LIST_APPEND);
[36]	454	if ( ret < 0 ) {
[40]	455	free(ptr);
	456	goto get_mode;
[36]	457	}
[1]	458
	459	hashtype = sh_tiger_get_hashtype();
	460
	461	if (hashtype == 0)
[40]	462	idmef_checksum_set_algorithm(checksum, IDMEF_CHECKSUM_ALGORITHM_TIGER);
[1]	463
[40]	464	else if (hashtype == 1)
	465	idmef_checksum_set_algorithm(checksum, IDMEF_CHECKSUM_ALGORITHM_SHA1);
	466
	467	else if (hashtype == 2)
	468	idmef_checksum_set_algorithm(checksum, IDMEF_CHECKSUM_ALGORITHM_MD5);
	469
	470	else
	471	idmef_checksum_set_algorithm(checksum, IDMEF_CHECKSUM_ALGORITHM_TIGER);
[1]	472
	473
[40]	474	ret = idmef_checksum_new_value(checksum, &str);
	475	if ( ret < 0 ) {
	476	free(ptr);
	477	goto get_mode;
[36]	478	}
[1]	479
	480	/* will be freed on destroy()
	481	*/
[40]	482	prelude_string_set_nodup(str, ptr);
	483	}
[1]	484
[40]	485	get_mode:
	486
[1]	487	mode = get_value(msg, _("mode"), suffix);
	488	if ( mode ) {
[22]	489	/* flawfinder: ignore // is part of name, not access() */
[26]	490	ret = idmef_file_new_file_access(file, &access, IDMEF_LIST_APPEND);
[1]	491	if ( ret < 0 )
[40]	492	goto get_owner;
[1]	493
[22]	494	/* flawfinder: ignore // is part of name, not access() */
[1]	495	ret = idmef_file_access_new_user_id(access, &userid);
	496	if ( ret < 0 )
[40]	497	goto get_owner;
[1]	498	idmef_user_id_set_type(userid, IDMEF_USER_ID_TYPE_OTHER_PRIVS);
	499
[22]	500	/* flawfinder: ignore // is part of name, not access() */
[1]	501	get_access_info ( access, mode, 7, 9 );
	502	}
[40]	503
	504	get_owner:
[1]	505
	506	ptr = get_value(msg, _("owner"), suffix);
	507	if ( ptr ) {
[40]	508	char * uid;
[1]	509
[22]	510	/* flawfinder: ignore // is part of name, not access() */
[26]	511	ret = idmef_file_new_file_access(file, &access, IDMEF_LIST_APPEND);
[36]	512	if ( ret < 0 ) {
	513	free(ptr);
[40]	514	goto get_group;
[36]	515	}
[1]	516
[22]	517	/* flawfinder: ignore // is part of name, not access() */
[1]	518	ret = idmef_file_access_new_user_id(access, &userid);
[36]	519	if ( ret < 0 ) {
	520	free(ptr);
[40]	521	goto get_group;
[36]	522	}
[1]	523	idmef_user_id_set_type(userid, IDMEF_USER_ID_TYPE_USER_PRIVS);
	524
	525	ret = idmef_user_id_new_name(userid, &str);
[36]	526	if ( ret < 0 ) {
	527	free(ptr);
[40]	528	goto get_group;
[36]	529	}
[1]	530	prelude_string_set_nodup(str, ptr);
	531
[40]	532	uid = get_value(msg, _("iowner"), suffix);
	533	if ( ! uid )
	534	goto get_group;
[1]	535
[40]	536	idmef_user_id_set_number(userid, strtoul(uid, NULL, 0));
[1]	537
	538	if ( mode ) {
[22]	539	/* flawfinder: ignore // is part of name, not access() */
[1]	540	get_access_info ( access, mode, 1, 3 );
	541	}
[40]	542
	543	free(uid);
[1]	544	}
	545
[40]	546	get_group:
	547
[1]	548	ptr = get_value(msg, _("group"), suffix);
	549	if ( ptr ) {
[40]	550	char *gid;
[1]	551
[22]	552	/* flawfinder: ignore // is part of name, not access() */
[26]	553	ret = idmef_file_new_file_access(file, &access, IDMEF_LIST_APPEND);
[36]	554	if ( ret < 0 ) {
	555	free(ptr);
	556	goto mode_free;
	557	}
[1]	558
[36]	559	ret = idmef_file_access_new_user_id(access, &userid);/* flawfinder: ignore // is part of name, not access() */
	560	if ( ret < 0 ) {
	561	free(ptr);
	562	goto mode_free;
	563	}
	564
[1]	565	idmef_user_id_set_type(userid, IDMEF_USER_ID_TYPE_GROUP_PRIVS);
	566
	567	ret = idmef_user_id_new_name(userid, &str);
[36]	568	if ( ret < 0 ) {
	569	free(ptr);
	570	goto mode_free;
	571	}
[1]	572
	573	prelude_string_set_nodup(str, ptr);
	574
[40]	575	gid = get_value(msg, _("igroup"), suffix);
	576	if ( ! gid )
[36]	577	goto mode_free;
[1]	578
[40]	579	idmef_user_id_set_number(userid, strtoul(gid, NULL, 0));
[1]	580
	581	if ( mode ) {
[22]	582	get_access_info ( access, mode, 4, 6 ); /* flawfinder: ignore */
[1]	583	}
[40]	584
	585	free(gid);
[1]	586	}
	587
[36]	588	mode_free:
	589
[1]	590	if ( mode ) {
	591	free ( mode );
	592	}
[36]	593
	594	return;
[1]	595	}
	596
	597
	598
	599	static int map_policy_to_class(char msg, unsigned long msgid, idmef_impact_t impact, prelude_string_t *out)
	600	{
	601	char *ptr;
	602	int ret, i;
	603	struct tbl {
	604	unsigned int msgid;
	605	const char *name;
	606	idmef_impact_type_t type;
	607	} tbl[] = {
	608
	609	#ifdef SH_USE_UTMP
	610	{ MSG_UT_LG1X, N_("User Login"), IDMEF_IMPACT_TYPE_USER },
	611	{ MSG_UT_LG1A, N_("User Login"), IDMEF_IMPACT_TYPE_USER },
	612	{ MSG_UT_LG1B, N_("User Login"), IDMEF_IMPACT_TYPE_USER },
	613	{ MSG_UT_LG2X, N_("Multiple User Login"), IDMEF_IMPACT_TYPE_USER },
	614	{ MSG_UT_LG2A, N_("Multiple User Login"), IDMEF_IMPACT_TYPE_USER },
	615	{ MSG_UT_LG2B, N_("Multiple User Login"), IDMEF_IMPACT_TYPE_USER },
	616	{ MSG_UT_LG3X, N_("User Logout"), IDMEF_IMPACT_TYPE_USER },
	617	{ MSG_UT_LG3A, N_("User Logout"), IDMEF_IMPACT_TYPE_USER },
	618	{ MSG_UT_LG3B, N_("User Logout"), IDMEF_IMPACT_TYPE_USER },
	619	{ MSG_UT_LG3C, N_("User Logout"), IDMEF_IMPACT_TYPE_USER },
	620	#endif
	621
	622	#if defined(SH_WITH_CLIENT) \|\| defined(SH_STANDALONE)
	623	{ MSG_FI_MISS, N_("File Missing"), IDMEF_IMPACT_TYPE_FILE },
	624	{ MSG_FI_MISS2, N_("File Missing"), IDMEF_IMPACT_TYPE_FILE },
	625	{ MSG_FI_ADD, N_("File Added"), IDMEF_IMPACT_TYPE_FILE },
	626	{ MSG_FI_ADD2, N_("File Added"), IDMEF_IMPACT_TYPE_FILE },
	627	{ MSG_FI_CHAN, N_("File Modified"), IDMEF_IMPACT_TYPE_FILE },
	628	{ MSG_FI_NODIR, N_("File found where directory was expected"), IDMEF_IMPACT_TYPE_FILE },
	629	#endif
	630
	631	#ifdef SH_USE_KERN
	632	{ MSG_KERN_POLICY, N_("Kernel Modified"), IDMEF_IMPACT_TYPE_OTHER },
	633	{ MSG_KERN_POL_CO, N_("Kernel Modified"), IDMEF_IMPACT_TYPE_OTHER },
	634	{ MSG_KERN_PROC, N_("Kernel Modified"), IDMEF_IMPACT_TYPE_OTHER },
	635	{ MSG_KERN_GATE, N_("Kernel Modified"), IDMEF_IMPACT_TYPE_OTHER },
	636	{ MSG_KERN_IDT, N_("Kernel Modified"), IDMEF_IMPACT_TYPE_OTHER },
	637	{ MSG_KERN_SYSCALL, N_("Kernel Modified"), IDMEF_IMPACT_TYPE_OTHER },
	638	#endif
	639
	640	#ifdef SH_USE_SUIDCHK
	641	{ MSG_SUID_POLICY, N_("SUID/SGID File Detected"), IDMEF_IMPACT_TYPE_FILE },
	642	#endif
	643	/*
	644	* This must be the last table entry
	645	*/
	646	{ 0, NULL, IDMEF_IMPACT_TYPE_OTHER },
	647	};
	648
	649	for ( i = 0; tbl[i].name != NULL; i++ ) {
	650	if ( tbl[i].msgid != msgid )
	651	continue;
	652
	653	idmef_impact_set_type(impact, tbl[i].type);
	654	return prelude_string_cat(out, _(tbl[i].name));
	655	}
	656
	657	/* some other message
	658	*/
	659	ptr = get_value(msg, _("msg"), NULL);
	660	if ( ! ptr ) {
	661	sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
	662	_("could not format Samhain message"), _("map_policy_to_class"));
	663	return -1;
	664	}
	665
	666	ret = prelude_string_cat(out, ptr);
	667	free(ptr);
	668
	669	return ret;
	670	}
	671
	672
	673
	674	static int get_login_info(char msg, idmef_alert_t alert)
	675	{
	676	int ret;
	677	char ptr, ip;
	678	idmef_user_t *user;
	679	idmef_node_t *node;
	680	struct passwd *pw;
	681	prelude_string_t *str;
	682	idmef_user_id_t *user_id;
	683	idmef_address_t *address;
	684	idmef_target_t *target = idmef_alert_get_next_target(alert, NULL);
	685	idmef_source_t *source = idmef_alert_get_next_source(alert, NULL);
	686
	687	ip = ptr = get_value(msg, _("ip"), NULL);
	688	if ( ptr ) {
	689	if ( ! source ) {
[26]	690	ret = idmef_alert_new_source(alert, &source, IDMEF_LIST_APPEND);
[1]	691	if ( ret < 0 ) {
	692	free(ptr);
	693	return ret;
	694	}
	695	}
	696
	697	ret = idmef_source_new_node(source, &node);
	698	if ( ret < 0 ) {
	699	free(ptr);
	700	return ret;
	701	}
	702
[26]	703	ret = idmef_node_new_address(node, &address, IDMEF_LIST_APPEND);
[1]	704	if ( ret < 0 ) {
	705	free(ptr);
	706	return ret;
	707	}
	708
	709	ret = idmef_address_new_address(address, &str);
	710	if ( ret < 0 ) {
	711	free(ptr);
	712	return ret;
	713	}
	714
	715	prelude_string_set_nodup(str, ptr);
	716	}
	717
	718	ptr = get_value(msg, _("host"), NULL);
	719	if ( ptr ) {
	720	if ( ip && strcmp(ptr, ip) == 0 )
	721	free(ptr);
	722	else {
	723	if ( ! source ) {
[26]	724	ret = idmef_alert_new_source(alert, &source, IDMEF_LIST_APPEND);
[1]	725	if ( ret < 0 ) {
	726	free(ptr);
	727	return ret;
	728	}
	729	}
	730
	731	ret = idmef_source_new_node(source, &node);
	732	if ( ret < 0 ) {
	733	free(ptr);
	734	return ret;
	735	}
	736
	737	ret = idmef_node_new_name(node, &str);
	738	if ( ret < 0 ) {
	739	free(ptr);
	740	return ret;
	741	}
	742
	743	prelude_string_set_nodup(str, ptr);
	744	}
	745	}
	746
	747	ptr = get_value(msg, _("name"), NULL);
	748	if ( ptr ) {
	749	ret = idmef_target_new_user(target, &user);
	750	if ( ret < 0 ) {
	751	free(ptr);
	752	return ret;
	753	}
	754
	755	idmef_user_set_category(user, IDMEF_USER_CATEGORY_OS_DEVICE);
	756
[26]	757	ret = idmef_user_new_user_id(user, &user_id, IDMEF_LIST_APPEND);
[1]	758	if ( ret < 0 ) {
	759	free(ptr);
	760	return ret;
	761	}
	762
	763	idmef_user_id_set_type(user_id, IDMEF_USER_ID_TYPE_TARGET_USER);
	764
	765	pw = getpwnam(ptr);
	766	if ( pw )
	767	idmef_user_id_set_number(user_id, pw->pw_uid);
	768
	769	ret = idmef_user_id_new_name(user_id, &str);
	770	if ( ret < 0 ) {
	771	free(ptr);
	772	return ret;
	773	}
	774	prelude_string_set_nodup(str, ptr);
	775
	776	ptr = get_value(msg, _("tty"), NULL);
	777	if ( ptr ) {
	778	ret = idmef_user_id_new_tty(user_id, &str);
	779	if ( ret < 0 ) {
	780	free(ptr);
	781	return ret;
	782	}
	783
	784	prelude_string_set_nodup(str, ptr);
	785	}
	786	}
	787
	788	ptr = get_time_value(msg, _("time"), NULL);
	789	if ( ptr ) {
	790	idmef_time_t *time;
	791
	792	ret = idmef_time_from_samhain(&time, ptr);
	793	free(ptr);
	794
	795	if ( ret < 0 )
	796	return ret;
	797
	798	idmef_alert_set_detect_time(alert, time);
	799	}
	800
	801	return 0;
	802	}
	803
	804
	805	static int samhain_alert_prelude(int priority, int sh_class,
	806	char *message, unsigned long msgid)
	807	{
	808	int ret;
	809	idmef_time_t *time;
	810	idmef_alert_t *alert;
	811	idmef_message_t *idmef;
	812	idmef_classification_t *classification;
	813	idmef_assessment_t *assessment;
	814	idmef_additional_data_t *data;
	815	idmef_impact_t *impact;
	816	idmef_target_t *target;
	817	idmef_confidence_t *confidence;
	818	prelude_string_t *str;
	819
[15]	820	if ( !client \|\| sh_class == STAMP)
[1]	821	return 0;
	822
	823	ret = idmef_message_new(&idmef);
	824	if ( ret < 0 )
	825	goto err;
	826
	827	ret = idmef_message_new_alert(idmef, &alert);
	828	if ( ret < 0 )
	829	goto err;
	830
[26]	831	idmef_alert_set_analyzer(alert, idmef_analyzer_ref(prelude_client_get_analyzer(client)), IDMEF_LIST_PREPEND);
[1]	832
	833	ret = idmef_time_new_from_gettimeofday(&time);
	834	if ( ret < 0 )
	835	goto err;
	836	idmef_alert_set_detect_time(alert, time);
	837
	838	ret = idmef_time_new_from_gettimeofday(&time);
	839	if ( ret < 0 )
	840	goto err;
	841	idmef_alert_set_create_time(alert, time);
	842
	843	ret = idmef_alert_new_classification(alert, &classification);
	844	if ( ret < 0 )
	845	goto err;
	846
[26]	847	ret = idmef_alert_new_target(alert, &target, IDMEF_LIST_APPEND);
[1]	848	if ( ret < 0 )
	849	goto err;
	850
	851	idmef_target_set_decoy(target, IDMEF_TARGET_DECOY_NO);
	852
	853	if ( idmef_analyzer_get_node(prelude_client_get_analyzer(client)) ) {
	854	idmef_node_ref(idmef_analyzer_get_node(prelude_client_get_analyzer(client)));
	855	idmef_target_set_node(target, idmef_analyzer_get_node(prelude_client_get_analyzer(client)));
	856	}
	857
	858	if ( strstr(message, _("path=")) ) {
[2]	859	#if defined(SH_WITH_CLIENT) \|\| defined(SH_STANDALONE)
[1]	860	if ( msgid != MSG_FI_ADD && msgid != MSG_FI_ADD2 )
	861	get_file_infos(target, message, IDMEF_FILE_CATEGORY_ORIGINAL);
[2]	862	#endif
[1]	863
	864	get_file_infos(target, message, IDMEF_FILE_CATEGORY_CURRENT);
	865	}
	866
	867	ret = idmef_alert_new_assessment(alert, &assessment);
	868	if ( ret < 0 )
	869	goto err;
	870
	871	ret = idmef_assessment_new_impact(assessment, &impact);
	872	if ( ret < 0 )
	873	goto err;
	874
	875	ret = idmef_classification_new_text(classification, &str);
	876	if ( ret < 0 )
	877	goto err;
	878
	879	ret = get_login_info(message, alert);
	880	if ( ret < 0 )
	881	goto err;
	882
	883	map_policy_to_class(message, msgid, impact, str);
	884
	885	#if 0
	886	if ( priority == SH_ERR_SEVERE \|\| priority == SH_ERR_FATAL )
	887	idmef_impact_set_severity(impact, IDMEF_IMPACT_SEVERITY_HIGH);
	888
	889	else if ( priority == SH_ERR_ALL \|\| priority == SH_ERR_INFO \|\| priority == SH_ERR_NOTICE )
	890	idmef_impact_set_severity(impact, IDMEF_IMPACT_SEVERITY_LOW);
	891
	892	else
	893	idmef_impact_set_severity(impact, IDMEF_IMPACT_SEVERITY_MEDIUM);
	894	#endif
	895	idmef_impact_set_severity(impact, map_severity(priority));
	896
	897	idmef_impact_set_completion(impact, IDMEF_IMPACT_COMPLETION_SUCCEEDED);
	898
	899	ret = idmef_assessment_new_confidence(assessment, &confidence);
	900	if ( ret < 0 )
	901	goto err;
	902
	903	idmef_confidence_set_rating(confidence, IDMEF_CONFIDENCE_RATING_HIGH);
	904
[26]	905	ret = idmef_alert_new_additional_data(alert, &data, IDMEF_LIST_APPEND);
[1]	906	if ( ret < 0 )
	907	goto err;
	908
	909	ret = idmef_additional_data_new_meaning(data, &str);
	910	if ( ret < 0 )
	911	goto err;
	912
	913	prelude_string_set_dup(str, _("Message generated by Samhain"));
	914	idmef_additional_data_set_type(data, IDMEF_ADDITIONAL_DATA_TYPE_STRING);
	915	idmef_additional_data_set_string_ref(data, message);
	916
	917	/* debug_print_message(idmef); */
	918
	919	prelude_client_send_idmef(client, idmef);
	920	idmef_message_destroy(idmef);
	921
	922	return 0;
	923
	924	err:
	925	idmef_message_destroy(idmef);
	926	return -1;
	927	}
	928
	929
	930	int sh_prelude_alert(int priority, int sh_class, char *message, long msgflags, unsigned long msgid)
	931	{
	932	int ret;
	933
	934	(void) msgflags; /* fix compiler warning */
	935
[15]	936	if ( initialized < 1 )
[1]	937	return -1;
	938
	939	ret = samhain_alert_prelude(priority, sh_class, message, msgid);
	940	if ( ret < 0 ) {
	941	sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
	942	_("Problem with IDMEF for prelude-ids support: alert lost"),
	943	_("sh_prelude_alert"));
	944	}
	945
	946	return ret;
	947	}
	948
	949
	950
[22]	951	int sh_prelude_set_profile(const char *arg)
[1]	952	{
	953	if ( profile ) {
	954	free(profile);
	955	profile = NULL;
	956	}
	957
	958	if ( arg ) {
	959	profile = strdup(arg);
	960	if ( ! profile )
	961	return -1;
	962	}
	963
	964	return 0;
	965	}
	966
[86]	967	/* Allow initialization of prelude; to be called
	968	* after forking the daemon. Delays heartbeat
	969	* start after config read until it is safe.
	970	*/
[1]	971	void sh_prelude_reset(void)
	972	{
	973	extern void sh_error_init_prelude();
	974
	975	ready_for_init = 1;
	976	sh_error_init_prelude();
	977	return;
	978	}
	979
	980
	981
	982	void sh_prelude_stop(void)
	983	{
	984	if (initialized < 1)
	985	return;
[108]	986
	987	if (sh.flag.isdaemon == S_TRUE)
	988	prelude_client_destroy(client, PRELUDE_CLIENT_EXIT_STATUS_FAILURE);
	989	else
	990	prelude_client_destroy(client, PRELUDE_CLIENT_EXIT_STATUS_SUCCESS);
	991
[15]	992	client = NULL;
[108]	993
	994	prelude_deinit();
	995
[1]	996	initialized = 0;
	997	return;
	998	}
	999
	1000
	1001
	1002	int sh_prelude_init(void)
	1003	{
	1004	int ret;
	1005	prelude_string_t *str;
	1006	idmef_analyzer_t *analyzer;
	1007	prelude_client_flags_t flags;
[20]	1008	#ifdef SH_NOFAILOVER
	1009	prelude_connection_pool_t *pool;
	1010	prelude_connection_pool_flags_t conn_flags;
	1011	#endif
[1]	1012
	1013	if (ready_for_init == 0)
	1014	return initialized;
	1015
	1016	if (initialized > 0)
	1017	return initialized;
	1018
	1019	prelude_thread_init(NULL);
[20]	1020	prelude_init(&sh_argc_store, sh_argv_store);
[1]	1021
	1022	ret = prelude_client_new(&client, profile ? profile : _("samhain"));
	1023	if ( ret < 0 ) {
	1024	sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
	1025	_("Failed to initialize Prelude"), _("sh_prelude_init"));
	1026	initialized = -1;
	1027	return -1;
	1028	}
	1029
	1030	/*
	1031	* Enable automatic heartbeat sending.
	1032	*/
	1033	flags = prelude_client_get_flags(client);
	1034	ret = prelude_client_set_flags(client, flags \| PRELUDE_CLIENT_FLAGS_ASYNC_TIMER);
	1035
	1036	analyzer = prelude_client_get_analyzer(client);
	1037
	1038	ret = idmef_analyzer_new_model(analyzer, &str);
	1039	prelude_string_set_dup(str, IDMEF_ANALYZER_MODEL);
	1040
	1041	ret = idmef_analyzer_new_class(analyzer, &str);
	1042	prelude_string_set_dup(str, IDMEF_ANALYZER_CLASS);
	1043
	1044	ret = idmef_analyzer_new_version(analyzer, &str);
	1045	prelude_string_set_dup(str, IDMEF_ANALYZER_VERSION);
	1046
[20]	1047	#ifdef SH_NOFAILOVER
	1048	pool = prelude_client_get_connection_pool(client);
	1049	conn_flags = prelude_connection_pool_get_flags(pool);
	1050
	1051	conn_flags &= ~PRELUDE_CONNECTION_POOL_FLAGS_FAILOVER;
	1052	prelude_connection_pool_set_flags(pool, conn_flags);
	1053	#endif
	1054
[1]	1055	ret = prelude_client_start(client);
	1056	if ( ret < 0 ) {
	1057	prelude_perror(ret, _("error starting prelude client"));
	1058
	1059	if ( prelude_client_is_setup_needed(ret) )
	1060	prelude_client_print_setup_error(client);
	1061
	1062	sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
	1063	_("Failed to start Prelude"), _("sh_prelude_init"));
	1064	initialized = -1;
	1065	return -1;
	1066	}
	1067
	1068	initialized = 1;
	1069	return 1;
	1070	}
	1071
	1072	/* HAVE_LIBPRELUDE_9 */
	1073	#endif
	1074

Note: See TracBrowser for help on using the repository browser.

Download in other formats: