Context Navigation

source: trunk/src/sh_prelude.c@ 173

Last change on this file since 173 was 170, checked in by katerina, 17 years ago
Plenty of compiler warnings fixed, SQL query length fixed, doc update.
File size: 37.9 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"
[131]	85	#define SH_NEED_PWD_GRP 1
	86	#include "sh_static.h"
[169]	87	char * sh_util_strdup (const char * str) SH_GNUC_MALLOC;
[1]	88	/*
	89	* When SH_USE_XML is set, value are formated using name="value".
	90	* Otherwise, value is formatted using the format name=<value>.
	91	*/
	92	#ifdef SH_USE_XML
	93	# define VALUE_DELIM_START '"'
	94	# define VALUE_DELIM_END '"'
	95	#else
	96	# define VALUE_DELIM_START '<'
	97	# define VALUE_DELIM_END '>'
	98	#endif
	99
	100	#define IDMEF_ANALYZER_MODEL _("Samhain")
	101	#define IDMEF_ANALYZER_CLASS _("Integrity Checker")
	102	#define IDMEF_ANALYZER_VERSION VERSION
[106]	103	#define IDMEF_ANALYZER_MANUFACTURER _("http://www.la-samhna.de/samhain/")
[1]	104
	105
	106
	107	/*
	108	* 0 = not initialized; -1 = failed; 1 = initialized
	109	*/
	110	static int initialized = 0;
	111	static int ready_for_init = 0;
	112
	113	static char *profile = NULL;
	114	static prelude_client_t *client = NULL;
	115
	116	static int severity_map[1 + (unsigned int) IDMEF_IMPACT_SEVERITY_HIGH] = {
	117	/* 0: unused (?) */ 0,
	118	/* 1: INFO */ 0,
	119	/* 2: LOW */ SH_ERR_ALL\|SH_ERR_INFO,
	120	/* 3: MEDIUM */ SH_ERR_NOTICE\|SH_ERR_WARN\|SH_ERR_STAMP\|SH_ERR_ERR,
	121	/* 4: HIGH */ SH_ERR_SEVERE\|SH_ERR_FATAL
	122	};
	123
	124	/* returns 0/tiger, 1/sha1, or 2/md5
	125	*/
	126	extern int sh_tiger_get_hashtype(void);
	127
	128	static void clear_and_set (int setpos, int flag)
	129	{
	130	unsigned int i;
	131	/* clear everywhere, and set at correct position */
	132	for (i = 1; i < (1 + (unsigned int) IDMEF_IMPACT_SEVERITY_HIGH); ++i)
	133	severity_map[i] &= ~flag;
	134	severity_map[setpos] \|= flag;
	135	return;
	136	}
	137
[22]	138	static int set_prelude_severity_int (const char * str, int prelude_sev)
[1]	139	{
[22]	140	char * p;
	141	char * dup = strdup (str);
[131]	142	#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_STRTOK_R)
	143	char * saveptr;
	144	#endif
[1]	145
[26]	146	if (!dup)
	147	return -1;
	148
[131]	149	#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_STRTOK_R)
	150	p = strtok_r (dup, ", \t", &saveptr);
	151	#else
[22]	152	p = strtok (dup, ", \t");
[131]	153	#endif
[1]	154	if (p) {
	155	do {
	156	if (0 == strcmp (p, _("alert")))
	157	clear_and_set (prelude_sev, SH_ERR_FATAL);
	158	else if (0 == strcmp (p, _("crit")))
	159	clear_and_set (prelude_sev, SH_ERR_SEVERE);
	160	else if (0 == strcmp (p, _("err")))
	161	clear_and_set (prelude_sev, SH_ERR_ERR);
	162	else if (0 == strcmp (p, _("mark")))
	163	clear_and_set (prelude_sev, SH_ERR_STAMP);
	164	else if (0 == strcmp (p, _("warn")))
	165	clear_and_set (prelude_sev, SH_ERR_WARN);
	166	else if (0 == strcmp (p, _("notice")))
	167	clear_and_set (prelude_sev, SH_ERR_NOTICE);
	168	else if (0 == strcmp (p, _("debug")))
	169	clear_and_set (prelude_sev, SH_ERR_ALL);
	170	else if (0 == strcmp (p, _("info")))
	171	clear_and_set (prelude_sev, SH_ERR_INFO);
[26]	172	else {
	173	free (dup);
[1]	174	return -1;
[26]	175	}
[131]	176	#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_STRTOK_R)
	177	p = strtok_r (NULL, ", \t", &saveptr);
	178	#else
[1]	179	p = strtok (NULL, ", \t");
[131]	180	#endif
[1]	181	} while (p);
	182	}
[22]	183	free(dup);
[1]	184	return 0;
	185	}
	186
[22]	187	int sh_prelude_map_info (const char * str)
[1]	188	{
	189	return (set_prelude_severity_int(str,(int)IDMEF_IMPACT_SEVERITY_INFO));
	190	}
[22]	191	int sh_prelude_map_low (const char * str)
[1]	192	{
	193	return (set_prelude_severity_int(str,(int)IDMEF_IMPACT_SEVERITY_LOW));
	194	}
[22]	195	int sh_prelude_map_medium (const char * str)
[1]	196	{
	197	return (set_prelude_severity_int(str,(int)IDMEF_IMPACT_SEVERITY_MEDIUM));
	198	}
[22]	199	int sh_prelude_map_high (const char * str)
[1]	200	{
	201	return (set_prelude_severity_int(str,(int)IDMEF_IMPACT_SEVERITY_HIGH));
	202	}
	203
	204	static idmef_impact_severity_t map_severity (int sam_sev)
	205	{
	206	int i;
	207	int max = 1 + (unsigned int) IDMEF_IMPACT_SEVERITY_HIGH;
	208	idmef_impact_severity_t retval = IDMEF_IMPACT_SEVERITY_MEDIUM;
	209
	210	for (i = 0; i < max; ++i) {
	211	if (severity_map[i] & sam_sev) {
	212	retval = (idmef_impact_severity_t) i;
	213	}
	214	}
	215	return retval;
	216	}
	217
	218	static char do_get_value(char ptr, char delim_start, char delim_end)
	219	{
	220	char *ret = NULL;
	221
	222	ptr = strchr(ptr, delim_start);
	223	if ( ! ptr )
	224	return NULL;
	225
	226	ret = ++ptr;
	227
	228	ptr = strchr(ptr, delim_end);
	229	if ( ! ptr )
	230	return NULL;
	231
	232	*ptr = '\0';
	233	ret = strdup(ret);
	234	*ptr = delim_end;
	235
	236	return ret;
	237	}
	238
	239
	240
	241	static char get_value(char msg, const char toktmp, const char toksuffix)
	242	{
	243	char *ptr, tok[128];
	244
	245	snprintf(tok, sizeof(tok), "%s%s=", toktmp, (toksuffix) ? toksuffix : "");
	246
	247	ptr = strstr(msg, tok);
	248	if ( ! ptr )
	249	return NULL;
	250
	251	return do_get_value(ptr, VALUE_DELIM_START, VALUE_DELIM_END);
	252	}
	253
	254
	255
	256	static char get_time_value(char msg, const char toktmp, const char toksuffix)
	257	{
	258
	259	char ret, ptr, tok[128];
	260
	261	snprintf(tok, sizeof(tok), "%s%s=", toktmp, (toksuffix) ? toksuffix : "");
	262
	263	ptr = strstr(msg, tok);
	264	if ( ! ptr )
	265	return NULL;
	266
	267	#ifndef SH_USE_XML
	268	ret = do_get_value(ptr, '[', ']');
	269	#else
	270	ret = do_get_value(ptr, VALUE_DELIM_START, VALUE_DELIM_END);
	271	#endif
	272
	273	return ret;
	274	}
	275
	276
	277
	278
	279	#if 0
	280	void debug_print_message(idmef_message_t *msg)
	281	{
	282	int ret;
	283	prelude_io_t *fd;
	284
	285	ret = prelude_io_new(&fd);
	286	if ( ret < 0 )
	287	return;
	288
	289	prelude_io_set_file_io(fd, stderr);
	290	idmef_message_print(idmef, fd);
	291
	292	prelude_io_destroy(fd);
	293	}
	294	#endif
	295
	296
	297
	298	static int idmef_time_from_samhain(idmef_time_t *time, const char str)
	299	{
	300	int ret;
	301	char *ptr;
	302	time_t utc;
	303	struct tm lt;
	304
	305	/*
	306	* Samhain stamp are encoded in UTC.
	307	*/
	308	ptr = strptime(str, _("%Y-%m-%dT%H:%M:%S"), &lt);
	309	if ( ! ptr ) {
	310	sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
	311	_("could not format Samhain time"), _("idmef_time_from_samhain"));
	312	return -1;
	313	}
	314
	315	utc = prelude_timegm(&lt);
	316
	317	ret = idmef_time_new_from_time(time, &utc);
	318	if ( ret < 0 )
	319	return ret;
	320
	321	return 0;
	322	}
	323
[22]	324	/* flawfinder: ignore // is part of name, not access() */
[1]	325	static void get_access_info(idmef_file_access_t access, char mode, int pos, int mpos)
	326	{
	327	int got = 0;
	328	int ret;
	329	prelude_string_t *str;
	330
	331	do {
	332	if ( mode[pos] == 'r' ) {
[22]	333	/* flawfinder: ignore // is part of name, not access() */
[26]	334	ret = idmef_file_access_new_permission(access, &str, IDMEF_LIST_APPEND);
[1]	335	if ( ret < 0 )
	336	return;
	337	prelude_string_set_dup(str, _("read"));
	338	++got;
	339	}
	340	else if ( mode[pos] == 'w' ) {
[22]	341	/* flawfinder: ignore // is part of name, not access() */
[26]	342	ret = idmef_file_access_new_permission(access, &str, IDMEF_LIST_APPEND);
[1]	343	if ( ret < 0 )
	344	return;
	345	prelude_string_set_dup(str, _("write"));
	346	++got;
	347	}
	348	else if ( mode[pos] == 'x' \|\| mode[pos] == 's' \|\| mode[pos] == 't') {
[22]	349	/* flawfinder: ignore // is part of name, not access() */
[26]	350	ret = idmef_file_access_new_permission(access, &str, IDMEF_LIST_APPEND);
[1]	351	if ( ret < 0 )
	352	return;
	353
	354	if ( mode[pos] == 'x' && mode[0] == 'd' )
	355	prelude_string_set_dup(str, _("search"));
	356
	357	else if ( mode[pos] == 'x' \|\| mode[pos] == 't' )
	358	prelude_string_set_dup(str, _("execute"));
	359
	360	else /* 's' */
	361	prelude_string_set_dup(str, _("executeAs"));
	362	++got;
	363	}
	364	++pos;
	365	} while (pos <= mpos);
	366
	367	if ( got == 0 ) {
[22]	368	/* flawfinder: ignore // is part of name, not access() */
[26]	369	ret = idmef_file_access_new_permission(access, &str, IDMEF_LIST_APPEND);
[1]	370	if ( ret < 0 )
	371	return;
	372	prelude_string_set_dup(str, _("noAccess"));
	373	}
	374	return;
	375	}
	376
	377
	378	static void get_file_infos(idmef_target_t target, char msg,
	379	idmef_file_category_t category)
	380	{
	381	int ret;
	382	int hashtype = 0;
	383	char *ptr;
	384	idmef_time_t *time;
	385	idmef_file_t *file;
	386	idmef_inode_t *inode;
	387	prelude_string_t *str;
	388	idmef_checksum_t *checksum;
[22]	389	idmef_file_access_t access; / flawfinder: ignore */
[1]	390	idmef_user_id_t *userid;
	391	const char *suffix = (category == IDMEF_FILE_CATEGORY_CURRENT) ? "_new" : "_old";
	392	char *mode = NULL;
	393
[26]	394	ret = idmef_target_new_file(target, &file, IDMEF_LIST_APPEND);
[1]	395	if ( ret < 0 )
	396	return;
	397	idmef_file_set_category(file, category);
	398
	399	ptr = get_value(msg, _("path"), NULL);
	400	if ( ptr ) {
	401	/*
	402	* In term of IDMEF, this is the full path,
	403	* including the name.
	404	*/
	405	ret = idmef_file_new_path(file, &str);
[36]	406	if ( ret < 0 ) {
	407	free(ptr);
[1]	408	return;
[36]	409	}
[1]	410	prelude_string_set_nodup(str, ptr);
	411
	412	ptr = strrchr(ptr, '/');
	413	if ( ptr ) {
	414	ret = idmef_file_new_name(file, &str);
[40]	415	if ( ret == 0 ) {
	416	prelude_string_set_dup(str, ptr + 1);
	417	}
[1]	418	}
	419	}
	420
	421	ptr = get_value(msg, _("size"), suffix);
	422	if ( ptr ) {
	423	idmef_file_set_data_size(file, strtoul(ptr, NULL, 10));
	424	free(ptr);
	425	}
	426
	427	ptr = get_time_value(msg, _("mtime"), suffix);
	428	if ( ptr ) {
	429	ret = idmef_time_from_samhain(&time, ptr);
[40]	430	if ( ret == 0 ) {
	431	idmef_file_set_modify_time(file, time);
[36]	432	}
[1]	433	free(ptr);
	434	}
	435
	436	ptr = get_time_value(msg, _("ctime"), suffix);
	437	if ( ptr ) {
	438	ret = idmef_time_from_samhain(&time, ptr);
[40]	439	if ( ret == 0 ) {
	440	idmef_file_set_create_time(file, time);
[36]	441	}
[1]	442	free(ptr);
	443	}
	444
	445	ptr = get_value(msg, _("inode"), suffix);
	446	if ( ptr ) {
	447	ret = idmef_file_new_inode(file, &inode);
[40]	448	if ( ret == 0 ) {
	449	char * dev = get_value(msg, _("dev"), suffix);
	450	if (dev) {
	451	char * q = strchr(dev, ',');
	452	if (*q) {
	453	*q = '\0'; ++q;
	454	idmef_inode_set_major_device(inode, strtoul(dev, NULL, 0));
	455	idmef_inode_set_minor_device(inode, strtoul( q, NULL, 0));
	456	}
	457	free(dev);
	458	}
	459	idmef_inode_set_number(inode, strtoul(ptr, NULL, 10));
[36]	460	}
[1]	461	free(ptr);
	462	}
	463
	464	ptr = get_value(msg, _("chksum"), suffix);
	465	if ( ptr ) {
[26]	466	ret = idmef_file_new_checksum(file, &checksum, IDMEF_LIST_APPEND);
[36]	467	if ( ret < 0 ) {
[40]	468	free(ptr);
	469	goto get_mode;
[36]	470	}
[1]	471
	472	hashtype = sh_tiger_get_hashtype();
	473
	474	if (hashtype == 0)
[40]	475	idmef_checksum_set_algorithm(checksum, IDMEF_CHECKSUM_ALGORITHM_TIGER);
[1]	476
[40]	477	else if (hashtype == 1)
	478	idmef_checksum_set_algorithm(checksum, IDMEF_CHECKSUM_ALGORITHM_SHA1);
	479
	480	else if (hashtype == 2)
	481	idmef_checksum_set_algorithm(checksum, IDMEF_CHECKSUM_ALGORITHM_MD5);
	482
	483	else
	484	idmef_checksum_set_algorithm(checksum, IDMEF_CHECKSUM_ALGORITHM_TIGER);
[1]	485
	486
[40]	487	ret = idmef_checksum_new_value(checksum, &str);
	488	if ( ret < 0 ) {
	489	free(ptr);
	490	goto get_mode;
[36]	491	}
[1]	492
	493	/* will be freed on destroy()
	494	*/
[40]	495	prelude_string_set_nodup(str, ptr);
	496	}
[1]	497
[40]	498	get_mode:
	499
[1]	500	mode = get_value(msg, _("mode"), suffix);
	501	if ( mode ) {
[22]	502	/* flawfinder: ignore // is part of name, not access() */
[26]	503	ret = idmef_file_new_file_access(file, &access, IDMEF_LIST_APPEND);
[1]	504	if ( ret < 0 )
[40]	505	goto get_owner;
[1]	506
[22]	507	/* flawfinder: ignore // is part of name, not access() */
[1]	508	ret = idmef_file_access_new_user_id(access, &userid);
	509	if ( ret < 0 )
[40]	510	goto get_owner;
[1]	511	idmef_user_id_set_type(userid, IDMEF_USER_ID_TYPE_OTHER_PRIVS);
	512
[22]	513	/* flawfinder: ignore // is part of name, not access() */
[1]	514	get_access_info ( access, mode, 7, 9 );
	515	}
[40]	516
	517	get_owner:
[1]	518
	519	ptr = get_value(msg, _("owner"), suffix);
	520	if ( ptr ) {
[40]	521	char * uid;
[1]	522
[22]	523	/* flawfinder: ignore // is part of name, not access() */
[26]	524	ret = idmef_file_new_file_access(file, &access, IDMEF_LIST_APPEND);
[36]	525	if ( ret < 0 ) {
	526	free(ptr);
[40]	527	goto get_group;
[36]	528	}
[1]	529
[22]	530	/* flawfinder: ignore // is part of name, not access() */
[1]	531	ret = idmef_file_access_new_user_id(access, &userid);
[36]	532	if ( ret < 0 ) {
	533	free(ptr);
[40]	534	goto get_group;
[36]	535	}
[1]	536	idmef_user_id_set_type(userid, IDMEF_USER_ID_TYPE_USER_PRIVS);
	537
	538	ret = idmef_user_id_new_name(userid, &str);
[36]	539	if ( ret < 0 ) {
	540	free(ptr);
[40]	541	goto get_group;
[36]	542	}
[1]	543	prelude_string_set_nodup(str, ptr);
	544
[40]	545	uid = get_value(msg, _("iowner"), suffix);
	546	if ( ! uid )
	547	goto get_group;
[1]	548
[40]	549	idmef_user_id_set_number(userid, strtoul(uid, NULL, 0));
[1]	550
	551	if ( mode ) {
[22]	552	/* flawfinder: ignore // is part of name, not access() */
[1]	553	get_access_info ( access, mode, 1, 3 );
	554	}
[40]	555
	556	free(uid);
[1]	557	}
	558
[40]	559	get_group:
	560
[1]	561	ptr = get_value(msg, _("group"), suffix);
	562	if ( ptr ) {
[40]	563	char *gid;
[1]	564
[22]	565	/* flawfinder: ignore // is part of name, not access() */
[26]	566	ret = idmef_file_new_file_access(file, &access, IDMEF_LIST_APPEND);
[36]	567	if ( ret < 0 ) {
	568	free(ptr);
	569	goto mode_free;
	570	}
[1]	571
[36]	572	ret = idmef_file_access_new_user_id(access, &userid);/* flawfinder: ignore // is part of name, not access() */
	573	if ( ret < 0 ) {
	574	free(ptr);
	575	goto mode_free;
	576	}
	577
[1]	578	idmef_user_id_set_type(userid, IDMEF_USER_ID_TYPE_GROUP_PRIVS);
	579
	580	ret = idmef_user_id_new_name(userid, &str);
[36]	581	if ( ret < 0 ) {
	582	free(ptr);
	583	goto mode_free;
	584	}
[1]	585
	586	prelude_string_set_nodup(str, ptr);
	587
[40]	588	gid = get_value(msg, _("igroup"), suffix);
	589	if ( ! gid )
[36]	590	goto mode_free;
[1]	591
[40]	592	idmef_user_id_set_number(userid, strtoul(gid, NULL, 0));
[1]	593
	594	if ( mode ) {
[22]	595	get_access_info ( access, mode, 4, 6 ); /* flawfinder: ignore */
[1]	596	}
[40]	597
	598	free(gid);
[1]	599	}
	600
[36]	601	mode_free:
	602
[1]	603	if ( mode ) {
	604	free ( mode );
	605	}
[36]	606
	607	return;
[1]	608	}
	609
	610
	611
	612	static int map_policy_to_class(char msg, unsigned long msgid, idmef_impact_t impact, prelude_string_t *out)
	613	{
	614	char *ptr;
	615	int ret, i;
	616	struct tbl {
	617	unsigned int msgid;
	618	const char *name;
	619	idmef_impact_type_t type;
	620	} tbl[] = {
	621
	622	#ifdef SH_USE_UTMP
	623	{ MSG_UT_LG1X, N_("User Login"), IDMEF_IMPACT_TYPE_USER },
	624	{ MSG_UT_LG1A, N_("User Login"), IDMEF_IMPACT_TYPE_USER },
	625	{ MSG_UT_LG1B, N_("User Login"), IDMEF_IMPACT_TYPE_USER },
	626	{ MSG_UT_LG2X, N_("Multiple User Login"), IDMEF_IMPACT_TYPE_USER },
	627	{ MSG_UT_LG2A, N_("Multiple User Login"), IDMEF_IMPACT_TYPE_USER },
	628	{ MSG_UT_LG2B, N_("Multiple User Login"), IDMEF_IMPACT_TYPE_USER },
	629	{ MSG_UT_LG3X, N_("User Logout"), IDMEF_IMPACT_TYPE_USER },
	630	{ MSG_UT_LG3A, N_("User Logout"), IDMEF_IMPACT_TYPE_USER },
	631	{ MSG_UT_LG3B, N_("User Logout"), IDMEF_IMPACT_TYPE_USER },
	632	{ MSG_UT_LG3C, N_("User Logout"), IDMEF_IMPACT_TYPE_USER },
	633	#endif
	634
	635	#if defined(SH_WITH_CLIENT) \|\| defined(SH_STANDALONE)
	636	{ MSG_FI_MISS, N_("File Missing"), IDMEF_IMPACT_TYPE_FILE },
	637	{ MSG_FI_MISS2, N_("File Missing"), IDMEF_IMPACT_TYPE_FILE },
	638	{ MSG_FI_ADD, N_("File Added"), IDMEF_IMPACT_TYPE_FILE },
	639	{ MSG_FI_ADD2, N_("File Added"), IDMEF_IMPACT_TYPE_FILE },
	640	{ MSG_FI_CHAN, N_("File Modified"), IDMEF_IMPACT_TYPE_FILE },
	641	{ MSG_FI_NODIR, N_("File found where directory was expected"), IDMEF_IMPACT_TYPE_FILE },
	642	#endif
	643
	644	#ifdef SH_USE_KERN
	645	{ MSG_KERN_POLICY, N_("Kernel Modified"), IDMEF_IMPACT_TYPE_OTHER },
	646	{ MSG_KERN_POL_CO, N_("Kernel Modified"), IDMEF_IMPACT_TYPE_OTHER },
	647	{ MSG_KERN_PROC, N_("Kernel Modified"), IDMEF_IMPACT_TYPE_OTHER },
	648	{ MSG_KERN_GATE, N_("Kernel Modified"), IDMEF_IMPACT_TYPE_OTHER },
	649	{ MSG_KERN_IDT, N_("Kernel Modified"), IDMEF_IMPACT_TYPE_OTHER },
	650	{ MSG_KERN_SYSCALL, N_("Kernel Modified"), IDMEF_IMPACT_TYPE_OTHER },
	651	#endif
	652
[169]	653	#ifdef SH_USE_PORTCHECK
	654	{ MSG_PORT_MISS, N_("Service closed"), IDMEF_IMPACT_TYPE_OTHER },
	655	{ MSG_PORT_NEW, N_("Service opened"), IDMEF_IMPACT_TYPE_OTHER },
	656	{ MSG_PORT_RESTART, N_("Service restarted"), IDMEF_IMPACT_TYPE_OTHER },
	657	{ MSG_PORT_NEWPORT, N_("Service restarted"), IDMEF_IMPACT_TYPE_OTHER },
	658	#endif
	659
[1]	660	#ifdef SH_USE_SUIDCHK
	661	{ MSG_SUID_POLICY, N_("SUID/SGID File Detected"), IDMEF_IMPACT_TYPE_FILE },
	662	#endif
	663	/*
	664	* This must be the last table entry
	665	*/
	666	{ 0, NULL, IDMEF_IMPACT_TYPE_OTHER },
	667	};
	668
	669	for ( i = 0; tbl[i].name != NULL; i++ ) {
	670	if ( tbl[i].msgid != msgid )
	671	continue;
	672
	673	idmef_impact_set_type(impact, tbl[i].type);
	674	return prelude_string_cat(out, _(tbl[i].name));
	675	}
	676
	677	/* some other message
	678	*/
	679	ptr = get_value(msg, _("msg"), NULL);
	680	if ( ! ptr ) {
	681	sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
	682	_("could not format Samhain message"), _("map_policy_to_class"));
	683	return -1;
	684	}
	685
	686	ret = prelude_string_cat(out, ptr);
	687	free(ptr);
	688
	689	return ret;
	690	}
	691
	692
[169]	693	#ifdef SH_USE_PORTCHECK
	694	static int get_service_info(char msg, idmef_alert_t alert)
	695	{
	696	int ret;
	697	long port;
	698	char ptr, new, tmp, ip, srv, end;
	699	prelude_string_t *str;
	700	idmef_address_t *address;
	701	idmef_node_t *node;
	702	idmef_service_t *service;
	703	idmef_source_t *source = idmef_alert_get_next_source(alert, NULL);
[1]	704
[169]	705	new = sh_util_strdup(msg);
	706
	707	ptr = strstr(new, _("port: "));
	708	if ( ! ptr ) {
	709	sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
	710	_("malformed Samhain port check message"), _("get_service_info"));
	711	SH_FREE( new );
	712	return -1;
	713	}
	714
	715	ptr += 6; /* skip 'port: ', position on first byte of interface */
	716	tmp = strchr(ptr, ':');
	717	if ( ! tmp ) {
	718	sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
	719	_("malformed Samhain port check message (no port)"), _("get_service_info"));
	720	SH_FREE( new );
	721	return -1;
	722	}
	723	*tmp = '\0';
	724
[170]	725	/* Get interface
	726	*/
[169]	727	ip = strdup(ptr);
	728	if ( ip ) {
	729	if ( ! source ) {
	730	ret = idmef_alert_new_source(alert, &source, IDMEF_LIST_APPEND);
	731	if ( ret < 0 ) {
	732	free(ip);
	733	SH_FREE( new );
	734	return ret;
	735	}
	736	}
	737
	738	ret = idmef_source_new_node(source, &node);
	739	if ( ret < 0 ) {
	740	free(ip);
	741	SH_FREE( new );
	742	return ret;
	743	}
	744
	745	ret = idmef_node_new_address(node, &address, IDMEF_LIST_APPEND);
	746	if ( ret < 0 ) {
	747	free(ip);
	748	SH_FREE( new );
	749	return ret;
	750	}
	751
	752	ret = idmef_address_new_address(address, &str);
	753	if ( ret < 0 ) {
	754	free(ip);
	755	SH_FREE( new );
	756	return ret;
	757	}
	758
	759	prelude_string_set_nodup(str, ip);
	760	}
	761
	762	ptr = tmp;
	763	++ptr;
	764	tmp = strchr(ptr, '/');
	765	if ( ! tmp ) {
	766	sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
	767	_("malformed Samhain port check message (no protocol)"), _("get_service_info"));
	768	SH_FREE( new );
	769	return -1;
	770	}
	771	*tmp = '\0';
	772
[170]	773	/* Get port number
	774	*/
[169]	775	port = strtol(ptr, &end, 0);
	776	if ( ptr && end == '\0' && port >= 0 && port < 65536) {
	777
	778	if ( ! source ) {
	779	ret = idmef_alert_new_source(alert, &source, IDMEF_LIST_APPEND);
	780	if ( ret < 0 ) {
	781	free(srv);
	782	SH_FREE( new );
	783	return ret;
	784	}
	785	}
	786
	787	ret = idmef_source_new_service(source, &service);
	788	if ( ret < 0 ) {
	789	free(srv);
	790	SH_FREE( new );
	791	return ret;
	792	}
	793
	794	idmef_service_set_port(service, port);
	795	}
	796
	797	ptr = tmp;
	798	++ptr;
	799	ptr = strchr(ptr, '(');
	800	if ( ! ptr ) {
	801	sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
	802	_("malformed Samhain port check message (no service)"), _("get_service_info"));
	803	SH_FREE( new );
	804	return -1;
	805	}
	806	++ptr;
	807	tmp = strchr(ptr, ')');
	808	if ( ! tmp ) {
	809	sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
	810	_("malformed Samhain port check message (service not closed)"), _("get_service_info"));
	811	SH_FREE( new );
	812	return -1;
	813	}
	814	*tmp = '\0';
	815
[170]	816	/* Get service
	817	*/
[169]	818	srv = strdup(ptr);
	819	if ( srv ) {
	820	if ( ! source ) {
	821	ret = idmef_alert_new_source(alert, &source, IDMEF_LIST_APPEND);
	822	if ( ret < 0 ) {
	823	free(srv);
	824	SH_FREE( new );
	825	return ret;
	826	}
	827	}
	828
	829	if ( ! service ) {
	830	ret = idmef_source_new_service(source, &service);
	831	if ( ret < 0 ) {
	832	free(srv);
	833	SH_FREE( new );
	834	return ret;
	835	}
	836	}
	837
[170]	838	ret = idmef_service_new_name(service, &str);
[169]	839	if ( ret < 0 ) {
	840	free(srv);
	841	SH_FREE( new );
	842	return ret;
	843	}
	844
	845	prelude_string_set_nodup(str, srv);
	846	}
	847
	848	SH_FREE( new );
	849
	850	return 0;
	851	}
	852	#endif
	853
[1]	854	static int get_login_info(char msg, idmef_alert_t alert)
	855	{
	856	int ret;
	857	char ptr, ip;
	858	idmef_user_t *user;
	859	idmef_node_t *node;
	860	struct passwd *pw;
[131]	861	#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
	862	struct passwd pwd;
	863	char buffer[SH_PWBUF_SIZE];
	864	#endif
[1]	865	prelude_string_t *str;
	866	idmef_user_id_t *user_id;
	867	idmef_address_t *address;
	868	idmef_target_t *target = idmef_alert_get_next_target(alert, NULL);
	869	idmef_source_t *source = idmef_alert_get_next_source(alert, NULL);
	870
	871	ip = ptr = get_value(msg, _("ip"), NULL);
	872	if ( ptr ) {
	873	if ( ! source ) {
[26]	874	ret = idmef_alert_new_source(alert, &source, IDMEF_LIST_APPEND);
[1]	875	if ( ret < 0 ) {
	876	free(ptr);
	877	return ret;
	878	}
	879	}
	880
	881	ret = idmef_source_new_node(source, &node);
	882	if ( ret < 0 ) {
	883	free(ptr);
	884	return ret;
	885	}
	886
[26]	887	ret = idmef_node_new_address(node, &address, IDMEF_LIST_APPEND);
[1]	888	if ( ret < 0 ) {
	889	free(ptr);
	890	return ret;
	891	}
	892
	893	ret = idmef_address_new_address(address, &str);
	894	if ( ret < 0 ) {
	895	free(ptr);
	896	return ret;
	897	}
	898
	899	prelude_string_set_nodup(str, ptr);
	900	}
	901
	902	ptr = get_value(msg, _("host"), NULL);
	903	if ( ptr ) {
	904	if ( ip && strcmp(ptr, ip) == 0 )
	905	free(ptr);
	906	else {
	907	if ( ! source ) {
[26]	908	ret = idmef_alert_new_source(alert, &source, IDMEF_LIST_APPEND);
[1]	909	if ( ret < 0 ) {
	910	free(ptr);
	911	return ret;
	912	}
	913	}
	914
	915	ret = idmef_source_new_node(source, &node);
	916	if ( ret < 0 ) {
	917	free(ptr);
	918	return ret;
	919	}
	920
	921	ret = idmef_node_new_name(node, &str);
	922	if ( ret < 0 ) {
	923	free(ptr);
	924	return ret;
	925	}
	926
	927	prelude_string_set_nodup(str, ptr);
	928	}
	929	}
	930
	931	ptr = get_value(msg, _("name"), NULL);
	932	if ( ptr ) {
	933	ret = idmef_target_new_user(target, &user);
	934	if ( ret < 0 ) {
	935	free(ptr);
	936	return ret;
	937	}
	938
	939	idmef_user_set_category(user, IDMEF_USER_CATEGORY_OS_DEVICE);
	940
[26]	941	ret = idmef_user_new_user_id(user, &user_id, IDMEF_LIST_APPEND);
[1]	942	if ( ret < 0 ) {
	943	free(ptr);
	944	return ret;
	945	}
	946
	947	idmef_user_id_set_type(user_id, IDMEF_USER_ID_TYPE_TARGET_USER);
	948
[131]	949	#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
	950	sh_getpwnam_r(ptr, &pwd, buffer, sizeof(buffer), &pw);
	951	#else
	952	pw = sh_getpwnam(ptr);
	953	#endif
[1]	954	if ( pw )
	955	idmef_user_id_set_number(user_id, pw->pw_uid);
	956
	957	ret = idmef_user_id_new_name(user_id, &str);
	958	if ( ret < 0 ) {
	959	free(ptr);
	960	return ret;
	961	}
	962	prelude_string_set_nodup(str, ptr);
	963
	964	ptr = get_value(msg, _("tty"), NULL);
	965	if ( ptr ) {
	966	ret = idmef_user_id_new_tty(user_id, &str);
	967	if ( ret < 0 ) {
	968	free(ptr);
	969	return ret;
	970	}
	971
	972	prelude_string_set_nodup(str, ptr);
	973	}
	974	}
	975
	976	ptr = get_time_value(msg, _("time"), NULL);
	977	if ( ptr ) {
	978	idmef_time_t *time;
	979
	980	ret = idmef_time_from_samhain(&time, ptr);
	981	free(ptr);
	982
	983	if ( ret < 0 )
	984	return ret;
	985
	986	idmef_alert_set_detect_time(alert, time);
	987	}
	988
	989	return 0;
	990	}
	991
	992
	993	static int samhain_alert_prelude(int priority, int sh_class,
	994	char *message, unsigned long msgid)
	995	{
	996	int ret;
	997	idmef_time_t *time;
	998	idmef_alert_t *alert;
	999	idmef_message_t *idmef;
	1000	idmef_classification_t *classification;
	1001	idmef_assessment_t *assessment;
	1002	idmef_additional_data_t *data;
	1003	idmef_impact_t *impact;
	1004	idmef_target_t *target;
	1005	idmef_confidence_t *confidence;
	1006	prelude_string_t *str;
	1007
[15]	1008	if ( !client \|\| sh_class == STAMP)
[1]	1009	return 0;
	1010
	1011	ret = idmef_message_new(&idmef);
	1012	if ( ret < 0 )
	1013	goto err;
	1014
	1015	ret = idmef_message_new_alert(idmef, &alert);
	1016	if ( ret < 0 )
	1017	goto err;
	1018
[26]	1019	idmef_alert_set_analyzer(alert, idmef_analyzer_ref(prelude_client_get_analyzer(client)), IDMEF_LIST_PREPEND);
[1]	1020
	1021	ret = idmef_time_new_from_gettimeofday(&time);
	1022	if ( ret < 0 )
	1023	goto err;
	1024	idmef_alert_set_detect_time(alert, time);
	1025
	1026	ret = idmef_time_new_from_gettimeofday(&time);
	1027	if ( ret < 0 )
	1028	goto err;
	1029	idmef_alert_set_create_time(alert, time);
	1030
	1031	ret = idmef_alert_new_classification(alert, &classification);
	1032	if ( ret < 0 )
	1033	goto err;
	1034
[26]	1035	ret = idmef_alert_new_target(alert, &target, IDMEF_LIST_APPEND);
[1]	1036	if ( ret < 0 )
	1037	goto err;
	1038
	1039	idmef_target_set_decoy(target, IDMEF_TARGET_DECOY_NO);
	1040
	1041	if ( idmef_analyzer_get_node(prelude_client_get_analyzer(client)) ) {
	1042	idmef_node_ref(idmef_analyzer_get_node(prelude_client_get_analyzer(client)));
	1043	idmef_target_set_node(target, idmef_analyzer_get_node(prelude_client_get_analyzer(client)));
	1044	}
	1045
	1046	if ( strstr(message, _("path=")) ) {
[2]	1047	#if defined(SH_WITH_CLIENT) \|\| defined(SH_STANDALONE)
[1]	1048	if ( msgid != MSG_FI_ADD && msgid != MSG_FI_ADD2 )
	1049	get_file_infos(target, message, IDMEF_FILE_CATEGORY_ORIGINAL);
[2]	1050	#endif
[1]	1051
	1052	get_file_infos(target, message, IDMEF_FILE_CATEGORY_CURRENT);
	1053	}
	1054
	1055	ret = idmef_alert_new_assessment(alert, &assessment);
	1056	if ( ret < 0 )
	1057	goto err;
	1058
	1059	ret = idmef_assessment_new_impact(assessment, &impact);
	1060	if ( ret < 0 )
	1061	goto err;
	1062
	1063	ret = idmef_classification_new_text(classification, &str);
	1064	if ( ret < 0 )
	1065	goto err;
	1066
	1067	ret = get_login_info(message, alert);
	1068	if ( ret < 0 )
	1069	goto err;
	1070
[169]	1071	#ifdef SH_USE_PORTCHECK
	1072	if (msgid == MSG_PORT_MISS \|\| msgid == MSG_PORT_NEW \|\| msgid == MSG_PORT_RESTART \|\| msgid == MSG_PORT_NEWPORT) {
	1073	ret = get_service_info(message, alert);
	1074	if ( ret < 0 )
	1075	goto err;
	1076	}
	1077	#endif
	1078
[1]	1079	map_policy_to_class(message, msgid, impact, str);
	1080
	1081	#if 0
	1082	if ( priority == SH_ERR_SEVERE \|\| priority == SH_ERR_FATAL )
	1083	idmef_impact_set_severity(impact, IDMEF_IMPACT_SEVERITY_HIGH);
	1084
	1085	else if ( priority == SH_ERR_ALL \|\| priority == SH_ERR_INFO \|\| priority == SH_ERR_NOTICE )
	1086	idmef_impact_set_severity(impact, IDMEF_IMPACT_SEVERITY_LOW);
	1087
	1088	else
	1089	idmef_impact_set_severity(impact, IDMEF_IMPACT_SEVERITY_MEDIUM);
	1090	#endif
	1091	idmef_impact_set_severity(impact, map_severity(priority));
	1092
	1093	idmef_impact_set_completion(impact, IDMEF_IMPACT_COMPLETION_SUCCEEDED);
	1094
	1095	ret = idmef_assessment_new_confidence(assessment, &confidence);
	1096	if ( ret < 0 )
	1097	goto err;
	1098
	1099	idmef_confidence_set_rating(confidence, IDMEF_CONFIDENCE_RATING_HIGH);
	1100
[26]	1101	ret = idmef_alert_new_additional_data(alert, &data, IDMEF_LIST_APPEND);
[1]	1102	if ( ret < 0 )
	1103	goto err;
	1104
	1105	ret = idmef_additional_data_new_meaning(data, &str);
	1106	if ( ret < 0 )
	1107	goto err;
	1108
	1109	prelude_string_set_dup(str, _("Message generated by Samhain"));
	1110	idmef_additional_data_set_type(data, IDMEF_ADDITIONAL_DATA_TYPE_STRING);
	1111	idmef_additional_data_set_string_ref(data, message);
	1112
	1113	/* debug_print_message(idmef); */
	1114
	1115	prelude_client_send_idmef(client, idmef);
	1116	idmef_message_destroy(idmef);
	1117
	1118	return 0;
	1119
	1120	err:
	1121	idmef_message_destroy(idmef);
	1122	return -1;
	1123	}
	1124
	1125
	1126	int sh_prelude_alert(int priority, int sh_class, char *message, long msgflags, unsigned long msgid)
	1127	{
	1128	int ret;
	1129
	1130	(void) msgflags; /* fix compiler warning */
	1131
[15]	1132	if ( initialized < 1 )
[1]	1133	return -1;
	1134
	1135	ret = samhain_alert_prelude(priority, sh_class, message, msgid);
	1136	if ( ret < 0 ) {
	1137	sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
	1138	_("Problem with IDMEF for prelude-ids support: alert lost"),
	1139	_("sh_prelude_alert"));
	1140	}
	1141
	1142	return ret;
	1143	}
	1144
	1145
	1146
[22]	1147	int sh_prelude_set_profile(const char *arg)
[1]	1148	{
	1149	if ( profile ) {
	1150	free(profile);
	1151	profile = NULL;
	1152	}
	1153
	1154	if ( arg ) {
	1155	profile = strdup(arg);
	1156	if ( ! profile )
	1157	return -1;
	1158	}
	1159
	1160	return 0;
	1161	}
	1162
[86]	1163	/* Allow initialization of prelude; to be called
	1164	* after forking the daemon. Delays heartbeat
	1165	* start after config read until it is safe.
	1166	*/
[1]	1167	void sh_prelude_reset(void)
	1168	{
	1169	extern void sh_error_init_prelude();
	1170
	1171	ready_for_init = 1;
	1172	sh_error_init_prelude();
	1173	return;
	1174	}
	1175
	1176
	1177
	1178	void sh_prelude_stop(void)
	1179	{
	1180	if (initialized < 1)
	1181	return;
[108]	1182
	1183	if (sh.flag.isdaemon == S_TRUE)
	1184	prelude_client_destroy(client, PRELUDE_CLIENT_EXIT_STATUS_FAILURE);
	1185	else
	1186	prelude_client_destroy(client, PRELUDE_CLIENT_EXIT_STATUS_SUCCESS);
	1187
[15]	1188	client = NULL;
[108]	1189
	1190	prelude_deinit();
	1191
[1]	1192	initialized = 0;
	1193	return;
	1194	}
	1195
	1196
	1197
	1198	int sh_prelude_init(void)
	1199	{
	1200	int ret;
	1201	prelude_string_t *str;
	1202	idmef_analyzer_t *analyzer;
	1203	prelude_client_flags_t flags;
[20]	1204	#ifdef SH_NOFAILOVER
	1205	prelude_connection_pool_t *pool;
	1206	prelude_connection_pool_flags_t conn_flags;
	1207	#endif
[1]	1208
	1209	if (ready_for_init == 0)
	1210	return initialized;
	1211
	1212	if (initialized > 0)
	1213	return initialized;
	1214
	1215	prelude_thread_init(NULL);
[20]	1216	prelude_init(&sh_argc_store, sh_argv_store);
[1]	1217
	1218	ret = prelude_client_new(&client, profile ? profile : _("samhain"));
	1219	if ( ret < 0 ) {
	1220	sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
	1221	_("Failed to initialize Prelude"), _("sh_prelude_init"));
	1222	initialized = -1;
	1223	return -1;
	1224	}
	1225
	1226	/*
	1227	* Enable automatic heartbeat sending.
	1228	*/
	1229	flags = prelude_client_get_flags(client);
	1230	ret = prelude_client_set_flags(client, flags \| PRELUDE_CLIENT_FLAGS_ASYNC_TIMER);
	1231
	1232	analyzer = prelude_client_get_analyzer(client);
	1233
	1234	ret = idmef_analyzer_new_model(analyzer, &str);
	1235	prelude_string_set_dup(str, IDMEF_ANALYZER_MODEL);
	1236
	1237	ret = idmef_analyzer_new_class(analyzer, &str);
	1238	prelude_string_set_dup(str, IDMEF_ANALYZER_CLASS);
	1239
	1240	ret = idmef_analyzer_new_version(analyzer, &str);
	1241	prelude_string_set_dup(str, IDMEF_ANALYZER_VERSION);
	1242
[20]	1243	#ifdef SH_NOFAILOVER
	1244	pool = prelude_client_get_connection_pool(client);
	1245	conn_flags = prelude_connection_pool_get_flags(pool);
	1246
	1247	conn_flags &= ~PRELUDE_CONNECTION_POOL_FLAGS_FAILOVER;
	1248	prelude_connection_pool_set_flags(pool, conn_flags);
	1249	#endif
	1250
[1]	1251	ret = prelude_client_start(client);
	1252	if ( ret < 0 ) {
	1253	prelude_perror(ret, _("error starting prelude client"));
	1254
	1255	if ( prelude_client_is_setup_needed(ret) )
	1256	prelude_client_print_setup_error(client);
	1257
	1258	sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
	1259	_("Failed to start Prelude"), _("sh_prelude_init"));
	1260	initialized = -1;
	1261	return -1;
	1262	}
	1263
	1264	initialized = 1;
	1265	return 1;
	1266	}
	1267
	1268	/* HAVE_LIBPRELUDE_9 */
	1269	#endif
	1270

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

Download in other formats: