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source: trunk/src/sh_prelude.c@ 161

Last change on this file since 161 was 131, checked in by rainer, 17 years ago
Use thread-safe libc functions.
File size: 32.7 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"
[1]	87
	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
	653	#ifdef SH_USE_SUIDCHK
	654	{ MSG_SUID_POLICY, N_("SUID/SGID File Detected"), IDMEF_IMPACT_TYPE_FILE },
	655	#endif
	656	/*
	657	* This must be the last table entry
	658	*/
	659	{ 0, NULL, IDMEF_IMPACT_TYPE_OTHER },
	660	};
	661
	662	for ( i = 0; tbl[i].name != NULL; i++ ) {
	663	if ( tbl[i].msgid != msgid )
	664	continue;
	665
	666	idmef_impact_set_type(impact, tbl[i].type);
	667	return prelude_string_cat(out, _(tbl[i].name));
	668	}
	669
	670	/* some other message
	671	*/
	672	ptr = get_value(msg, _("msg"), NULL);
	673	if ( ! ptr ) {
	674	sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
	675	_("could not format Samhain message"), _("map_policy_to_class"));
	676	return -1;
	677	}
	678
	679	ret = prelude_string_cat(out, ptr);
	680	free(ptr);
	681
	682	return ret;
	683	}
	684
	685
	686
	687	static int get_login_info(char msg, idmef_alert_t alert)
	688	{
	689	int ret;
	690	char ptr, ip;
	691	idmef_user_t *user;
	692	idmef_node_t *node;
	693	struct passwd *pw;
[131]	694	#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
	695	struct passwd pwd;
	696	char buffer[SH_PWBUF_SIZE];
	697	#endif
[1]	698	prelude_string_t *str;
	699	idmef_user_id_t *user_id;
	700	idmef_address_t *address;
	701	idmef_target_t *target = idmef_alert_get_next_target(alert, NULL);
	702	idmef_source_t *source = idmef_alert_get_next_source(alert, NULL);
	703
	704	ip = ptr = get_value(msg, _("ip"), NULL);
	705	if ( ptr ) {
	706	if ( ! source ) {
[26]	707	ret = idmef_alert_new_source(alert, &source, IDMEF_LIST_APPEND);
[1]	708	if ( ret < 0 ) {
	709	free(ptr);
	710	return ret;
	711	}
	712	}
	713
	714	ret = idmef_source_new_node(source, &node);
	715	if ( ret < 0 ) {
	716	free(ptr);
	717	return ret;
	718	}
	719
[26]	720	ret = idmef_node_new_address(node, &address, IDMEF_LIST_APPEND);
[1]	721	if ( ret < 0 ) {
	722	free(ptr);
	723	return ret;
	724	}
	725
	726	ret = idmef_address_new_address(address, &str);
	727	if ( ret < 0 ) {
	728	free(ptr);
	729	return ret;
	730	}
	731
	732	prelude_string_set_nodup(str, ptr);
	733	}
	734
	735	ptr = get_value(msg, _("host"), NULL);
	736	if ( ptr ) {
	737	if ( ip && strcmp(ptr, ip) == 0 )
	738	free(ptr);
	739	else {
	740	if ( ! source ) {
[26]	741	ret = idmef_alert_new_source(alert, &source, IDMEF_LIST_APPEND);
[1]	742	if ( ret < 0 ) {
	743	free(ptr);
	744	return ret;
	745	}
	746	}
	747
	748	ret = idmef_source_new_node(source, &node);
	749	if ( ret < 0 ) {
	750	free(ptr);
	751	return ret;
	752	}
	753
	754	ret = idmef_node_new_name(node, &str);
	755	if ( ret < 0 ) {
	756	free(ptr);
	757	return ret;
	758	}
	759
	760	prelude_string_set_nodup(str, ptr);
	761	}
	762	}
	763
	764	ptr = get_value(msg, _("name"), NULL);
	765	if ( ptr ) {
	766	ret = idmef_target_new_user(target, &user);
	767	if ( ret < 0 ) {
	768	free(ptr);
	769	return ret;
	770	}
	771
	772	idmef_user_set_category(user, IDMEF_USER_CATEGORY_OS_DEVICE);
	773
[26]	774	ret = idmef_user_new_user_id(user, &user_id, IDMEF_LIST_APPEND);
[1]	775	if ( ret < 0 ) {
	776	free(ptr);
	777	return ret;
	778	}
	779
	780	idmef_user_id_set_type(user_id, IDMEF_USER_ID_TYPE_TARGET_USER);
	781
[131]	782	#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
	783	sh_getpwnam_r(ptr, &pwd, buffer, sizeof(buffer), &pw);
	784	#else
	785	pw = sh_getpwnam(ptr);
	786	#endif
[1]	787	if ( pw )
	788	idmef_user_id_set_number(user_id, pw->pw_uid);
	789
	790	ret = idmef_user_id_new_name(user_id, &str);
	791	if ( ret < 0 ) {
	792	free(ptr);
	793	return ret;
	794	}
	795	prelude_string_set_nodup(str, ptr);
	796
	797	ptr = get_value(msg, _("tty"), NULL);
	798	if ( ptr ) {
	799	ret = idmef_user_id_new_tty(user_id, &str);
	800	if ( ret < 0 ) {
	801	free(ptr);
	802	return ret;
	803	}
	804
	805	prelude_string_set_nodup(str, ptr);
	806	}
	807	}
	808
	809	ptr = get_time_value(msg, _("time"), NULL);
	810	if ( ptr ) {
	811	idmef_time_t *time;
	812
	813	ret = idmef_time_from_samhain(&time, ptr);
	814	free(ptr);
	815
	816	if ( ret < 0 )
	817	return ret;
	818
	819	idmef_alert_set_detect_time(alert, time);
	820	}
	821
	822	return 0;
	823	}
	824
	825
	826	static int samhain_alert_prelude(int priority, int sh_class,
	827	char *message, unsigned long msgid)
	828	{
	829	int ret;
	830	idmef_time_t *time;
	831	idmef_alert_t *alert;
	832	idmef_message_t *idmef;
	833	idmef_classification_t *classification;
	834	idmef_assessment_t *assessment;
	835	idmef_additional_data_t *data;
	836	idmef_impact_t *impact;
	837	idmef_target_t *target;
	838	idmef_confidence_t *confidence;
	839	prelude_string_t *str;
	840
[15]	841	if ( !client \|\| sh_class == STAMP)
[1]	842	return 0;
	843
	844	ret = idmef_message_new(&idmef);
	845	if ( ret < 0 )
	846	goto err;
	847
	848	ret = idmef_message_new_alert(idmef, &alert);
	849	if ( ret < 0 )
	850	goto err;
	851
[26]	852	idmef_alert_set_analyzer(alert, idmef_analyzer_ref(prelude_client_get_analyzer(client)), IDMEF_LIST_PREPEND);
[1]	853
	854	ret = idmef_time_new_from_gettimeofday(&time);
	855	if ( ret < 0 )
	856	goto err;
	857	idmef_alert_set_detect_time(alert, time);
	858
	859	ret = idmef_time_new_from_gettimeofday(&time);
	860	if ( ret < 0 )
	861	goto err;
	862	idmef_alert_set_create_time(alert, time);
	863
	864	ret = idmef_alert_new_classification(alert, &classification);
	865	if ( ret < 0 )
	866	goto err;
	867
[26]	868	ret = idmef_alert_new_target(alert, &target, IDMEF_LIST_APPEND);
[1]	869	if ( ret < 0 )
	870	goto err;
	871
	872	idmef_target_set_decoy(target, IDMEF_TARGET_DECOY_NO);
	873
	874	if ( idmef_analyzer_get_node(prelude_client_get_analyzer(client)) ) {
	875	idmef_node_ref(idmef_analyzer_get_node(prelude_client_get_analyzer(client)));
	876	idmef_target_set_node(target, idmef_analyzer_get_node(prelude_client_get_analyzer(client)));
	877	}
	878
	879	if ( strstr(message, _("path=")) ) {
[2]	880	#if defined(SH_WITH_CLIENT) \|\| defined(SH_STANDALONE)
[1]	881	if ( msgid != MSG_FI_ADD && msgid != MSG_FI_ADD2 )
	882	get_file_infos(target, message, IDMEF_FILE_CATEGORY_ORIGINAL);
[2]	883	#endif
[1]	884
	885	get_file_infos(target, message, IDMEF_FILE_CATEGORY_CURRENT);
	886	}
	887
	888	ret = idmef_alert_new_assessment(alert, &assessment);
	889	if ( ret < 0 )
	890	goto err;
	891
	892	ret = idmef_assessment_new_impact(assessment, &impact);
	893	if ( ret < 0 )
	894	goto err;
	895
	896	ret = idmef_classification_new_text(classification, &str);
	897	if ( ret < 0 )
	898	goto err;
	899
	900	ret = get_login_info(message, alert);
	901	if ( ret < 0 )
	902	goto err;
	903
	904	map_policy_to_class(message, msgid, impact, str);
	905
	906	#if 0
	907	if ( priority == SH_ERR_SEVERE \|\| priority == SH_ERR_FATAL )
	908	idmef_impact_set_severity(impact, IDMEF_IMPACT_SEVERITY_HIGH);
	909
	910	else if ( priority == SH_ERR_ALL \|\| priority == SH_ERR_INFO \|\| priority == SH_ERR_NOTICE )
	911	idmef_impact_set_severity(impact, IDMEF_IMPACT_SEVERITY_LOW);
	912
	913	else
	914	idmef_impact_set_severity(impact, IDMEF_IMPACT_SEVERITY_MEDIUM);
	915	#endif
	916	idmef_impact_set_severity(impact, map_severity(priority));
	917
	918	idmef_impact_set_completion(impact, IDMEF_IMPACT_COMPLETION_SUCCEEDED);
	919
	920	ret = idmef_assessment_new_confidence(assessment, &confidence);
	921	if ( ret < 0 )
	922	goto err;
	923
	924	idmef_confidence_set_rating(confidence, IDMEF_CONFIDENCE_RATING_HIGH);
	925
[26]	926	ret = idmef_alert_new_additional_data(alert, &data, IDMEF_LIST_APPEND);
[1]	927	if ( ret < 0 )
	928	goto err;
	929
	930	ret = idmef_additional_data_new_meaning(data, &str);
	931	if ( ret < 0 )
	932	goto err;
	933
	934	prelude_string_set_dup(str, _("Message generated by Samhain"));
	935	idmef_additional_data_set_type(data, IDMEF_ADDITIONAL_DATA_TYPE_STRING);
	936	idmef_additional_data_set_string_ref(data, message);
	937
	938	/* debug_print_message(idmef); */
	939
	940	prelude_client_send_idmef(client, idmef);
	941	idmef_message_destroy(idmef);
	942
	943	return 0;
	944
	945	err:
	946	idmef_message_destroy(idmef);
	947	return -1;
	948	}
	949
	950
	951	int sh_prelude_alert(int priority, int sh_class, char *message, long msgflags, unsigned long msgid)
	952	{
	953	int ret;
	954
	955	(void) msgflags; /* fix compiler warning */
	956
[15]	957	if ( initialized < 1 )
[1]	958	return -1;
	959
	960	ret = samhain_alert_prelude(priority, sh_class, message, msgid);
	961	if ( ret < 0 ) {
	962	sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
	963	_("Problem with IDMEF for prelude-ids support: alert lost"),
	964	_("sh_prelude_alert"));
	965	}
	966
	967	return ret;
	968	}
	969
	970
	971
[22]	972	int sh_prelude_set_profile(const char *arg)
[1]	973	{
	974	if ( profile ) {
	975	free(profile);
	976	profile = NULL;
	977	}
	978
	979	if ( arg ) {
	980	profile = strdup(arg);
	981	if ( ! profile )
	982	return -1;
	983	}
	984
	985	return 0;
	986	}
	987
[86]	988	/* Allow initialization of prelude; to be called
	989	* after forking the daemon. Delays heartbeat
	990	* start after config read until it is safe.
	991	*/
[1]	992	void sh_prelude_reset(void)
	993	{
	994	extern void sh_error_init_prelude();
	995
	996	ready_for_init = 1;
	997	sh_error_init_prelude();
	998	return;
	999	}
	1000
	1001
	1002
	1003	void sh_prelude_stop(void)
	1004	{
	1005	if (initialized < 1)
	1006	return;
[108]	1007
	1008	if (sh.flag.isdaemon == S_TRUE)
	1009	prelude_client_destroy(client, PRELUDE_CLIENT_EXIT_STATUS_FAILURE);
	1010	else
	1011	prelude_client_destroy(client, PRELUDE_CLIENT_EXIT_STATUS_SUCCESS);
	1012
[15]	1013	client = NULL;
[108]	1014
	1015	prelude_deinit();
	1016
[1]	1017	initialized = 0;
	1018	return;
	1019	}
	1020
	1021
	1022
	1023	int sh_prelude_init(void)
	1024	{
	1025	int ret;
	1026	prelude_string_t *str;
	1027	idmef_analyzer_t *analyzer;
	1028	prelude_client_flags_t flags;
[20]	1029	#ifdef SH_NOFAILOVER
	1030	prelude_connection_pool_t *pool;
	1031	prelude_connection_pool_flags_t conn_flags;
	1032	#endif
[1]	1033
	1034	if (ready_for_init == 0)
	1035	return initialized;
	1036
	1037	if (initialized > 0)
	1038	return initialized;
	1039
	1040	prelude_thread_init(NULL);
[20]	1041	prelude_init(&sh_argc_store, sh_argv_store);
[1]	1042
	1043	ret = prelude_client_new(&client, profile ? profile : _("samhain"));
	1044	if ( ret < 0 ) {
	1045	sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
	1046	_("Failed to initialize Prelude"), _("sh_prelude_init"));
	1047	initialized = -1;
	1048	return -1;
	1049	}
	1050
	1051	/*
	1052	* Enable automatic heartbeat sending.
	1053	*/
	1054	flags = prelude_client_get_flags(client);
	1055	ret = prelude_client_set_flags(client, flags \| PRELUDE_CLIENT_FLAGS_ASYNC_TIMER);
	1056
	1057	analyzer = prelude_client_get_analyzer(client);
	1058
	1059	ret = idmef_analyzer_new_model(analyzer, &str);
	1060	prelude_string_set_dup(str, IDMEF_ANALYZER_MODEL);
	1061
	1062	ret = idmef_analyzer_new_class(analyzer, &str);
	1063	prelude_string_set_dup(str, IDMEF_ANALYZER_CLASS);
	1064
	1065	ret = idmef_analyzer_new_version(analyzer, &str);
	1066	prelude_string_set_dup(str, IDMEF_ANALYZER_VERSION);
	1067
[20]	1068	#ifdef SH_NOFAILOVER
	1069	pool = prelude_client_get_connection_pool(client);
	1070	conn_flags = prelude_connection_pool_get_flags(pool);
	1071
	1072	conn_flags &= ~PRELUDE_CONNECTION_POOL_FLAGS_FAILOVER;
	1073	prelude_connection_pool_set_flags(pool, conn_flags);
	1074	#endif
	1075
[1]	1076	ret = prelude_client_start(client);
	1077	if ( ret < 0 ) {
	1078	prelude_perror(ret, _("error starting prelude client"));
	1079
	1080	if ( prelude_client_is_setup_needed(ret) )
	1081	prelude_client_print_setup_error(client);
	1082
	1083	sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
	1084	_("Failed to start Prelude"), _("sh_prelude_init"));
	1085	initialized = -1;
	1086	return -1;
	1087	}
	1088
	1089	initialized = 1;
	1090	return 1;
	1091	}
	1092
	1093	/* HAVE_LIBPRELUDE_9 */
	1094	#endif
	1095

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