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source: branches/samhain-2_2-branch/src/sh_utils.c@ 456

Last change on this file since 456 was 34, checked in by rainer, 19 years ago
Code cleanup and minor fixes
File size: 40.1 KB

Line
1	/* SAMHAIN file system integrity testing */
2	/* Copyright (C) 1999, 2000 Rainer Wichmann */
3	/* */
4	/* This program is free software; you can redistribute it */
5	/* and/or modify */
6	/* it under the terms of the GNU General Public License as */
7	/* published by */
8	/* the Free Software Foundation; either version 2 of the License, or */
9	/* (at your option) any later version. */
10	/* */
11	/* This program is distributed in the hope that it will be useful, */
12	/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
13	/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
14	/* GNU General Public License for more details. */
15	/* */
16	/* You should have received a copy of the GNU General Public License */
17	/* along with this program; if not, write to the Free Software */
18	/* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
19
20	#include "config_xor.h"
21
22
23	#include <stdlib.h>
24	#include <stdio.h>
25	#include <string.h>
26	#include <ctype.h>
27	#include <unistd.h>
28
29	#if TIME_WITH_SYS_TIME
30	#include <sys/time.h>
31	#include <time.h>
32	#else
33	#if HAVE_SYS_TIME_H
34	#include <sys/time.h>
35	#else
36	#include <time.h>
37	#endif
38	#endif
39
40
41	#include "samhain.h"
42	#include "sh_error.h"
43	#include "sh_utils.h"
44	#include "sh_unix.h"
45	#include "sh_tiger.h"
46	#include "sh_entropy.h"
47
48	#undef FIL__
49	#define FIL__ _("sh_utils.c")
50
51	UINT32 ErrFlag[2];
52
53	int sh_util_flagval(const char * c, int * fval)
54	{
55	SL_ENTER(_("sh_util_flagval"));
56	if (c == NULL)
57	SL_RETURN( (-1), _("sh_util_flagval"));
58	if ( c[0] == '1' \|\| c[0] == 'y' \|\| c[0] == 'Y' \|\|
59	c[0] == 't' \|\| c[0] == 'T')
60	{
61	*fval = S_TRUE;
62	SL_RETURN( (0), _("sh_util_flagval"));
63	}
64	if ( c[0] == '0' \|\| c[0] == 'n' \|\| c[0] == 'N' \|\|
65	c[0] == 'f' \|\| c[0] == 'F')
66	{
67	*fval = S_FALSE;
68	SL_RETURN( (0), _("sh_util_flagval"));
69	}
70	SL_RETURN( (-1), _("sh_util_flagval"));
71	}
72
73	int sh_util_timeout_check (SH_TIMEOUT * sh_timer)
74	{
75	UINT64 now = (UINT64) time(NULL);
76	UINT64 dif;
77
78	if (sh_timer->flag_ok == S_FALSE)
79	{
80	/* first time
81	*/
82	if (sh_timer->time_last == 0)
83	{
84	sh_timer->time_last = now;
85	return S_TRUE;
86	}
87	/* later on
88	*/
89	dif = now - sh_timer->time_last;
90	if (dif < sh_timer->time_dist)
91	{
92	return S_FALSE;
93	}
94	sh_timer->time_last = now;
95	return S_TRUE;
96	}
97	sh_timer->time_last = now;
98	return S_FALSE;
99	}
100
101	static int sh_ask_update = S_FALSE;
102
103	int sh_util_set_interactive(const char * str)
104	{
105	(void) str;
106
107	sh_ask_update = S_TRUE;
108
109	sh_unix_setnodeamon(NULL);
110
111	return 0;
112	}
113
114	#if !defined(STDIN_FILENO)
115	#define STDIN_FILENO 0
116	#endif
117	#if !defined(STDERR_FILENO)
118	#define STDERR_FILENO 0
119	#endif
120
121	int sh_util_ask_update(char * path)
122	{
123	int inchar, c;
124	int i = S_TRUE;
125	char * tmp = NULL;
126
127	SL_ENTER(_("sh_util_ask_update"));
128
129	if (sh_ask_update != S_TRUE)
130	{
131	SL_RETURN(i, _("sh_util_ask_update"));
132	}
133
134	#ifdef HAVE_TTYNAME
135	if (!ttyname(STDIN_FILENO))
136	{
137	if (NULL != ttyname(STDERR_FILENO))
138	{
139	if (NULL == freopen(ttyname(STDERR_FILENO), "r", stdin))
140	{
141	sh_error_handle ((-1), FIL__, __LINE__, 0,
142	MSG_E_SUBGEN,
143	_("Cannot continue: stdin is not a terminal"),
144	_("sh_util_ask_update"));
145	exit(EXIT_FAILURE);
146	}
147	}
148	else
149	{
150	sh_error_handle ((-1), FIL__, __LINE__, 0,
151	MSG_E_SUBGEN,
152	_("Cannot continue: stdin is not a terminal"),
153	_("sh_util_ask_update"));
154	exit(EXIT_FAILURE);
155	}
156	}
157	#endif
158
159	if (sh_ask_update == S_TRUE)
160	{
161	tmp = sh_util_safe_name (path);
162	fprintf (stderr, _("Update %s [Y/n] ? "), tmp);
163	SH_FREE(tmp);
164	while (1 == 1)
165	{
166	c = fgetc(stdin); inchar = c;
167	/@+charintliteral@/
168	while (c != '\n' && c != EOF)
169	c = fgetc(stdin);
170	/* fprintf(stderr, "CHAR (1): %c\n", inchar); */
171	if (inchar == 'Y' \|\| inchar == 'y' \|\| inchar == '\n')
172	{
173	break;
174	}
175	else if (inchar == 'n' \|\| inchar == 'N')
176	{
177	i = S_FALSE;
178	break;
179	}
180	else
181	{
182	fprintf(stderr, _("Please answer y(es) or n(o)\n"));
183	}
184	/@-charintliteral@/
185	}
186	}
187
188	SL_RETURN(i, _("sh_util_ask_update"));
189	}
190
191	int sh_util_hidesetup(const char * c)
192	{
193	int i;
194	SL_ENTER(_("sh_util_hidesetup"));
195	i = sh_util_flagval(c, &(sh.flag.hidefile));
196
197	SL_RETURN(i, _("sh_util_hidesetup"));
198	}
199
200	char * sh_util_strdup (const char * str)
201	{
202	char * p = NULL;
203	size_t len;
204
205	SL_ENTER(_("sh_util_strdup"));
206
207	SH_VALIDATE_NE(str, NULL);
208
209	len = sl_strlen(str);
210	p = SH_ALLOC (len + 1);
211	(void) sl_strlcpy (p, str, len+1);
212
213	SL_RETURN( p, _("sh_util_strdup"));
214	}
215
216	/* by the eircom.net computer incident
217	* response team
218	*/
219	char * sh_util_strsep (char *str, const char delim)
220	{
221	char ret, c, *d;
222
223	SL_ENTER(_("sh_util_strsep"));
224	ret = *str;
225
226	SH_VALIDATE_NE(ret, NULL);
227
228	for (c = str; c != '\0'; c++) {
229	for (d = (char ) delim; d != '\0'; d++) {
230	if (c == d) {
231	*c = '\0';
232	*str = c + 1;
233	SL_RETURN(ret, _("sh_util_strsep"));
234	}
235	}
236	}
237
238	/* If we get to here, there's no delimiters in the string */
239	*str = NULL;
240	SL_RETURN(ret, _("sh_util_strsep"));
241	}
242
243
244	/* returned string must be free'd by caller.
245	*/
246	char * sh_util_formatted (const char * formatt, st_format * ftab)
247	{
248	struct tm * time_ptr;
249	size_t size;
250	size_t isiz;
251	char * fmt = NULL;
252	char * p;
253	char * q;
254	char * outstr;
255	int i;
256	int j;
257	time_t inpp;
258
259	char * clist[16] = { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
260	NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL };
261	int nn = 0;
262
263	SL_ENTER(_("sh_util_formatted"));
264
265	if (formatt == NULL \|\| ftab == NULL \|\| *formatt == '\0')
266	SL_RETURN(NULL, _("sh_util_formatted"));
267
268	/* -- save the format (we overwrite it !!) --
269	*/
270	size = sl_strlen(formatt);
271
272	if (!sl_ok_adds(size, 1))
273	SL_RETURN(NULL, _("sh_util_formatted"));
274
275	++size;
276	fmt = SH_ALLOC(size);
277	(void) sl_strlcpy(fmt, formatt, size);
278
279	p = fmt;
280
281	j = 0;
282	while (ftab[j].fchar != '\0') {
283	if (ftab[j].type != S_FMT_STRING)
284	ftab[j].data_str = NULL;
285	++j;
286	}
287
288	while (p != NULL && *p != '\0' && NULL != (q = strchr(p, '%')))
289	{
290	++q;
291
292	/* fprintf(stderr, "p == %s q == %s\n", p, q); */
293
294	/* -- end of string is a '%' --
295	*/
296	if (*q == '\0')
297	{
298	--q;
299	*q = '\0';
300	break;
301	}
302
303	i = 0;
304	j = 0;
305
306	/* -- search the format char in input table --
307	* put (nn < 16) here -> all remaining %foo will be
308	* converted to %%
309	*/
310	while (ftab[j].fchar != '\0' && nn < 16)
311	{
312	if (ftab[j].fchar == *q)
313	{
314	/* -- Convert it to a string format (%s). --
315	*/
316	*q = 's'
317	;
318	i = 1;
319
320	switch(ftab[j].type) {
321
322	case S_FMT_STRING:
323	{
324	isiz = sl_strlen(ftab[j].data_str);
325	if (isiz > 0 && sl_ok_adds(size, isiz))
326	{
327	size += isiz;
328	clist[nn] = ftab[j].data_str;
329	++nn;
330	}
331	else
332	*q = '%';
333	goto endsrch;
334	}
335	break;
336
337	case S_FMT_ULONG:
338	{
339	ftab[j].data_str = (char *) SH_ALLOC(64);
340	/@-bufferoverflowhigh@/
341	sprintf (ftab[j].data_str, "%lu", /* known to fit */
342	ftab[j].data_ulong);
343	/@+bufferoverflowhigh@/
344	isiz = sl_strlen(ftab[j].data_str);
345	if (isiz > 0 && sl_ok_adds(size, isiz))
346	{
347	size += isiz;
348	clist[nn] = ftab[j].data_str;
349	++nn;
350	}
351	else
352	*q = '%';
353	goto endsrch;
354	}
355	break;
356
357	case S_FMT_LONG:
358	{
359	ftab[j].data_str = (char *) SH_ALLOC(64);
360	/@-bufferoverflowhigh@/
361	sprintf (ftab[j].data_str, "%ld", /* known to fit */
362	ftab[j].data_long);
363	/@+bufferoverflowhigh@/
364	isiz = sl_strlen(ftab[j].data_str);
365	if (isiz > 0 && sl_ok_adds(size, isiz))
366	{
367	size += isiz;
368	clist[nn] = ftab[j].data_str;
369	++nn;
370	}
371	else
372	*q = '%';
373	goto endsrch;
374	}
375	break;
376
377	case S_FMT_TIME:
378	{
379	ftab[j].data_str = (char *) SH_ALLOC(64);
380	inpp = (time_t)ftab[j].data_ulong;
381	if (inpp != 0)
382	{
383	time_ptr = localtime (&(inpp));
384	if (time_ptr != NULL)
385	(void) strftime(ftab[j].data_str, 64,
386	_("%d-%m-%Y %H:%M:%S"), time_ptr);
387	else
388	(void) sl_strlcpy(ftab[j].data_str,
389	_("00-00-0000 00:00:00"), 64);
390	}
391	else
392	{
393	(void) sl_strlcpy(ftab[j].data_str,
394	_("(None)"), 64);
395	}
396	isiz = sl_strlen(ftab[j].data_str);
397	if (isiz > 0 && sl_ok_adds(size, isiz))
398	{
399	size += isiz;
400	clist[nn] = ftab[j].data_str;
401	++nn;
402	}
403	else
404	*q = '%';
405	goto endsrch;
406	}
407	break;
408
409	default:
410	/* do nothing */;
411	}
412
413	}
414	++j;
415	}
416
417	endsrch:
418
419	p = q;
420
421	/* -- not found -- */
422	if (i == 0)
423	{
424	*q = '%';
425	++p;
426	}
427
428	}
429
430	/* -- Format string evaluated.
431	clist[] List of strings
432	size Total size of format string + clist[] strings
433	-- */
434
435	/* -- closing '\0' --
436	*/
437	if (sl_ok_adds(size, 1))
438	size++;
439	outstr = (char *) SH_ALLOC(size);
440
441	/* -- print it --
442	*/
443	(void) sl_snprintf( outstr, size, fmt,
444	clist[0], clist[1], clist[2], clist[3],
445	clist[4], clist[5], clist[6], clist[7],
446	clist[8], clist[9], clist[10], clist[11],
447	clist[12], clist[13], clist[14], clist[15]);
448	outstr[size-1] = '\0';
449
450	/* -- cleanup --
451	*/
452	j = 0;
453	while (ftab[j].fchar != '\0') {
454	if (ftab[j].type != S_FMT_STRING && ftab[j].data_str != NULL)
455	SH_FREE(ftab[j].data_str);
456	++j;
457	}
458	SH_FREE(fmt);
459
460	SL_RETURN(outstr, _("sh_util_formatted"));
461	}
462
463	/* can't inline (AIX)
464	*/
465	int sh_util_hexchar( const char c )
466	{
467	/@+charint@/
468	if ( c >= '0' && c <= '9' )
469	return c - '0';
470	else if ( c >= 'a' && c <= 'f' )
471	return c - 'a' + 10;
472	else if ( c >= 'A' && c <= 'F' )
473	return c - 'A' + 10;
474	else return -1;
475	/@-charint@/
476	}
477
478	/* read a hexadecimal key, convert to binary
479	*/
480	int sh_util_hextobinary (char * binary, const char * hex, int bytes)
481	{
482	int i = 0, j, k, l = 0;
483	char c;
484
485	#define SH_HEXCHAR(x, y) \
486	c = (x); \
487	if ( c >= '0' && c <= '9' ) \
488	y = c - '0'; \
489	else if ( c >= 'a' && c <= 'f' ) \
490	y = c - 'a' + 10; \
491	else if ( c >= 'A' && c <= 'F' ) \
492	y = c - 'A' + 10; \
493	else \
494	SL_RETURN((-1), _("sh_util_hextobinary"))
495
496
497	SL_ENTER(_("sh_util_hextobinary"));
498
499	if (bytes < 2)
500	SL_RETURN((-1), _("sh_util_hextobinary"));
501
502	while (i < (bytes-1))
503	{
504	SH_HEXCHAR(hex[i], k);
505	SH_HEXCHAR(hex[i+1], j);
506
507	binary[l] = (char)(k * 16 + j);
508	++l; i+= 2;
509	}
510
511	SL_RETURN((0), _("sh_util_hextobinary"));
512	}
513
514	static void copy_four (unsigned char * dest, UINT32 in)
515	{
516	UINT32 i, j;
517	int count;
518
519	SL_ENTER(_("copy_four"));
520	for (count = 0; count < 4; ++count)
521	{
522	i = in / 256;
523	j = in - (i*256);
524	dest[count] = (unsigned char) j;
525	in = i;
526	}
527	SL_RET0(_("copy_four"));
528	}
529
530	/* compute HMAC-TIGER
531	*/
532	static char * sh_util_hmac_tiger (char * hexkey,
533	char * text, size_t textlen)
534	{
535	static char opad[KEY_BLOCK] = {
536	(char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C,
537	(char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C,
538	(char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C,
539	(char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C
540	};
541	static char ipad[KEY_BLOCK] = {
542	(char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36,
543	(char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36,
544	(char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36,
545	(char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36
546	};
547	static char zap[KEY_BLOCK] = {
548	(char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00,
549	(char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00,
550	(char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00,
551	(char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00
552	};
553	char K[KEY_BLOCK];
554	char outer[KEY_BLOCK];
555	char * inner;
556	UINT32 * h1;
557	UINT32 * h2;
558	UINT32 cc[KEY_LEN/4];
559	char * res;
560
561	size_t i;
562
563	SL_ENTER(_("sh_util_hmac_tiger"));
564	ASSERT((KEY_BLOCK <= (KEY_LEN/2)), _("KEY_BLOCK <= (KEY_LEN/2)"))
565
566	if (KEY_BLOCK > (KEY_LEN/2))
567	{
568	res = sh_tiger_hash (NULL, TIGER_DATA, 0);
569	SL_RETURN(res, _("sh_util_hmac_tiger"));
570	}
571
572	memcpy (K, zap, KEY_BLOCK);
573
574	if (sh_util_hextobinary (K, hexkey, KEY_LEN) < 0)
575	{
576	res = sh_tiger_hash (NULL, TIGER_DATA, 0);
577	SL_RETURN(res, _("sh_util_hmac_tiger"));
578	}
579
580	if (sl_ok_adds(textlen, KEY_BLOCK))
581	{
582	inner = (char *) SH_ALLOC (textlen + KEY_BLOCK);
583
584	for (i = 0; i < KEY_BLOCK; ++i)
585	{
586	outer[i] = K[i] ^ opad[i];
587	inner[i] = K[i] ^ ipad[i];
588	}
589	for (i = KEY_BLOCK; i < (KEY_BLOCK+textlen); ++i)
590	{
591	inner[i] = text[i - KEY_BLOCK];
592	}
593	}
594	else
595	{
596	sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
597	_("integer overflow"),
598	_("sh_util_hmac_tiger"));
599	res = sh_tiger_hash (NULL, TIGER_DATA, 0);
600	SL_RETURN(res, _("sh_util_hmac_tiger"));
601	}
602
603	/* now compute the hash
604	*/
605	h1 = sh_tiger_hash_uint32 ( outer,
606	TIGER_DATA,
607	KEY_BLOCK);
608	for (i = 0; i < (KEY_LEN/8); ++i)
609	{
610	/* cc[i] = h1[i]; */
611	copy_four ( (unsigned char *) &(cc[i]), h1[i]);
612	}
613
614	h2 = sh_tiger_hash_uint32 ( inner,
615	TIGER_DATA,
616	(unsigned long) KEY_BLOCK+textlen);
617	for (i = KEY_LEN/8; i < (KEY_LEN/4); ++i)
618	{
619	copy_four ( (unsigned char *) &(cc[i]), h2[i - (KEY_LEN/8)]);
620	/* cc[i] = h2[i - (KEY_LEN/8)]; */
621	}
622	SH_FREE(inner);
623
624	res = sh_tiger_hash ((char *) &cc[0],
625	TIGER_DATA,
626	(unsigned long) (KEY_LEN/4 * sizeof(UINT32)));
627
628	SL_RETURN(res, _("sh_util_hmac_tiger"));
629	}
630
631	static char * sh_util_hash_tiger ( char * hexkey,
632	char * text, size_t textlen)
633	{
634	char * res;
635	char h2[2*KEY_LEN+1];
636	SL_ENTER(_("sh_util_hash_tiger"));
637
638	(void) sl_strlcpy(h2, hexkey, KEY_LEN+1);
639	(void) sl_strlcat(h2, sh_tiger_hash(text, TIGER_DATA,
640	(unsigned long) textlen), 2*KEY_LEN+1);
641
642	res = sh_tiger_hash(h2, TIGER_DATA, 2*KEY_LEN);
643
644	SL_RETURN(res, _("sh_util_hash_tiger"));
645	}
646
647	/* --- compute signature on data ---
648	*/
649	#define TYPE_HMAC 0
650	#define TYPE_HASH 1
651
652	static int sigtype = TYPE_HMAC;
653
654	int sh_util_sigtype (const char * c)
655	{
656	SL_ENTER(_("sh_util_sigtype"));
657	if (c == NULL)
658	SL_RETURN( -1, _("sh_util_sigtype"));
659
660	if (0 == strcmp(_("HMAC-TIGER"), c))
661	sigtype = TYPE_HMAC;
662	else if (0 == strcmp(_("HASH-TIGER"), c))
663	sigtype = TYPE_HASH;
664	else
665	SL_RETURN( -1, _("sh_util_sigtype"));
666
667	SL_RETURN( 0, _("sh_util_sigtype"));
668	}
669
670	char * sh_util_siggen (char * hexkey,
671	char * text, size_t textlen)
672	{
673	char * p;
674
675	SL_ENTER(_("sh_util_siggen"));
676	if (sigtype == TYPE_HMAC)
677	p = sh_util_hmac_tiger (hexkey,
678	text, textlen);
679	else
680	p = sh_util_hash_tiger (hexkey,
681	text, textlen);
682	SL_RETURN(p, _("sh_util_siggen"));
683	}
684
685
686	/* a simple compressor
687	*/
688	long sh_util_compress (char * dest, char * src, size_t dest_size)
689	{
690	char * add;
691	char * get;
692	size_t count = 0;
693	size_t dest_end;
694
695	SL_ENTER(_("sh_util_compress"));
696
697	if (dest_size == 0)
698	SL_RETURN((0), _("sh_util_compress"));
699
700	if ((dest == NULL) \|\| (src == NULL))
701	SL_RETURN((0), _("sh_util_compress"));
702
703	dest_end = sl_strlen(dest);
704
705	if (dest_end > dest_size)
706	SL_RETURN((0), _("sh_util_compress"));
707
708	add = &dest[dest_end];
709	get = src;
710
711	while (count < (dest_size-dest_end))
712	{
713	if (isalnum((int) *get))
714	{
715	add = get;
716	++add;
717	++count;
718	}
719	++get;
720	if (*get == '\0' && (count < (dest_size-dest_end)))
721	/* end of src reached */
722	{
723	add = get; /* copy the '\0' */
724	break; /* and stop copying */
725	}
726	}
727
728	dest[dest_size-1] = '\0'; /* paranoia */
729	SL_RETURN(((long)count), _("sh_util_compress")); /* no of chars copied */
730	}
731
732
733	/* copy the four least significant bytes
734	*/
735	void sh_util_cpylong (char * dest, const char * src, int len )
736	{
737	int i, j;
738	union
739	{
740	long l;
741	char c[sizeof(long)];
742	} u;
743
744	SL_ENTER(_("sh_util_cpylong"));
745
746	u.l = 1;
747
748	/* MSB is first
749	*/
750	if (sizeof(long)>4 &&/@+charint@/(u.c[sizeof(long)-1] == 1)/@-charint@/)
751	{
752	j = (int) (sizeof(long)-4);
753	for (i = 0; i < j; ++i) ++src;
754	}
755
756	i = 0;
757
758	while (i < 4)
759	{
760	dest = (src);
761	++dest; ++src;
762	if (i == (len-1)) break;
763	++i;
764	}
765	SL_RET0(_("sh_util_cpylong"));
766	}
767
768	/* This is a maximally equidistributed combined Tausworthe
769	* generator. The sequence is,
770	*
771	* x_n = (s1_n ^ s2_n ^ s3_n)
772	*
773	* s1_{n+1} = (((s1_n & 4294967294) <<12) ^ (((s1_n <<13) ^ s1_n) >>19))
774	* s2_{n+1} = (((s2_n & 4294967288) << 4) ^ (((s2_n << 2) ^ s2_n) >>25))
775	* s3_{n+1} = (((s3_n & 4294967280) <<17) ^ (((s3_n << 3) ^ s3_n) >>11))
776	*
777	* computed modulo 2^32. In the three formulas above '^' means
778	* exclusive-or (C-notation), not exponentiation. Note that the
779	* algorithm relies on the properties of 32-bit unsigned integers (it
780	* is formally defined on bit-vectors of length 32).
781	*
782	* Stolen from GSL (GNU scientific library) and modified somewhat.
783	* I am using UINT32, which is guaranteed to be 32 bits. Also made
784	* sure that the initialization vector is valid.
785	*/
786
787
788	/* interval [0, 4294967296]
789	*/
790	static UINT32 taus_get_long (void *vstate)
791	{
792	UINT32 * state = (UINT32 *) vstate;
793
794	if (skey->rngI == BAD)
795	(void)taus_seed();
796
797	#define TAUSWORTHE(s,a,b,c,d) ((s &c) <<d) ^ (((s <<a) ^s) >>b)
798	/@+ignorequals@/
799	state[0] = TAUSWORTHE (state[0], 13, 19, 4294967294UL, 12);
800	state[1] = TAUSWORTHE (state[1], 2, 25, 4294967288UL, 4);
801	state[2] = TAUSWORTHE (state[2], 3, 11, 4294967280UL, 17);
802	/@-ignorequals@/
803	return (state[0] ^ state[1] ^ state[2]);
804	}
805
806	/* Hide the internal state of the PRNG by using its output as
807	* input for a one-way hash function.
808	*/
809	UINT32 taus_svec[6];
810
811	UINT32 taus_get (void state1, void state2, void *state3)
812	{
813	UINT32 retval;
814	UINT32 * res;
815	static UINT32 res_vec[6];
816	static int res_num = 0;
817	register int i;
818
819	if (res_num > 0)
820	{
821	retval = res_vec[res_num];
822	res_num = (res_num == 5) ? 0 : (res_num + 1);
823	return retval;
824	}
825
826	taus_svec[0] = taus_get_long (state1);
827	taus_svec[1] = taus_get_long (state2);
828	taus_svec[2] = taus_get_long (state3);
829	taus_svec[3] = taus_get_long (state1);
830	taus_svec[4] = taus_get_long (state2);
831	taus_svec[5] = taus_get_long (state3);
832
833	res = sh_tiger_hash_uint32 ( (char *) &taus_svec[0],
834	TIGER_DATA,
835	(unsigned long)(6 * sizeof(UINT32)));
836
837	for (i = 1; i < 6; ++i)
838	{
839	res_vec[i] = res[i];
840	}
841	retval = taus_svec[0];
842	res_num = 1;
843
844	taus_svec[0] = 0; taus_svec[1] = 0; taus_svec[2] = 0;
845	taus_svec[3] = 0; taus_svec[4] = 0; taus_svec[5] = 0;
846
847	return retval;
848	}
849
850	/* interval [0,1)
851	*/
852	double taus_get_double (void *vstate)
853	{
854	return taus_get_long (vstate) / (4294967296.0 + 1.0) ;
855	}
856
857	#define LCG(n) ((69069 * n) & 0xffffffffUL)
858
859	/* TAKE CARE: state[0], state[1], state[2] must be > 2,8,16, respectively
860	*/
861	static void taus_set_from_ulong (void *vstate, unsigned long int s)
862	{
863	UINT32 state = (UINT32 ) vstate;
864
865	if (s == 0)
866	s = 1; /* default seed is 1 */
867
868	state[0] = (UINT32)(LCG (s) \| (UINT32) 0x03);
869	state[1] = (UINT32)(LCG (state[0]) \| (UINT32) 0x09);
870	state[2] = (UINT32)(LCG (state[1]) \| (UINT32) 0x17);
871
872	/* 'warm up'
873	*/
874	(void) taus_get_long (state);
875	(void) taus_get_long (state);
876	(void) taus_get_long (state);
877	(void) taus_get_long (state);
878	(void) taus_get_long (state);
879	(void) taus_get_long (state);
880
881	return;
882	}
883
884	static void taus_set_from_state (void vstate, void init_state)
885	{
886	UINT32 state = (UINT32 ) vstate;
887	UINT32 state0 = (UINT32 ) init_state;
888
889	state[0] = state0[0] \| (UINT32) 0x03;
890	state[1] = state0[1] \| (UINT32) 0x09;
891	state[2] = state0[2] \| (UINT32) 0x17;
892
893	return;
894	}
895
896
897	int taus_seed ()
898	{
899	char bufx[9 * sizeof(UINT32) + 1];
900	int status;
901	static unsigned long seed_time = 0;
902
903	SL_ENTER(_("taus_seed"));
904
905	if (skey->rngI == GOOD)
906	{
907	if ( (sh_unix_longtime () - seed_time) < 3600)
908	SL_RETURN( (0), _("taus_seed"));
909	}
910
911	seed_time = sh_unix_longtime ();
912
913	status = sh_entropy (24, bufx);
914
915	if (!SL_ISERROR(status))
916	{
917	skey->rngI = GOOD;
918	memcpy (&skey->rng0[0], &bufx[0], 2*sizeof(UINT32));
919	memcpy (&skey->rng1[0], &bufx[2sizeof(UINT32)], 2sizeof(UINT32));
920	memcpy (&skey->rng2[0], &bufx[4sizeof(UINT32)], 2sizeof(UINT32));
921	memset (bufx, 0, 9 * sizeof(UINT32) + 1);
922
923	skey->rng0[2] = 0;
924	skey->rng1[2] = 0;
925	skey->rng2[2] = 0;
926
927	taus_set_from_state( &(skey->rng0[0]), &(skey->rng0[0]));
928	taus_set_from_state( &(skey->rng1[0]), &(skey->rng1[0]));
929	taus_set_from_state( &(skey->rng2[0]), &(skey->rng2[0]));
930
931	SL_RETURN( (0), _("taus_seed"));
932	}
933
934	sh_error_handle ((-1), FIL__, __LINE__, status, MSG_ES_ENT,
935	_("sh_entropy"));
936
937	/* emergency backup - unsafe !
938	*/
939	skey->rngI = GOOD;
940	#ifdef HAVE_GETTIMEOFDAY
941	taus_set_from_ulong ( &(skey->rng0[0]), LCG (sh_unix_notime()) );
942	#else
943	taus_set_from_ulong ( &(skey->rng0[0]), LCG (seed_time) );
944	#endif
945	taus_set_from_ulong ( &(skey->rng1[0]), LCG (skey->rng0[0]) );
946	taus_set_from_ulong ( &(skey->rng2[0]), LCG (skey->rng1[0]) );
947	skey->rngI = BAD;
948
949	SL_RETURN( (-1), _("taus_seed"));
950	}
951
952	/@+charint@/
953	static unsigned char new_key[] = { 0xA7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xA7 };
954	/@-charint@/
955	static void copy_four (unsigned char * dest, UINT32 in);
956
957	int sh_util_set_newkey (const char * new_in)
958	{
959	size_t i, j = 0;
960	size_t len;
961	SL_TICKET fp;
962	SL_TICKET fout;
963	char * key;
964	char * path;
965	char * outpath = NULL;
966	unsigned char * image = NULL;
967	long s = 0;
968	long ilen = 0;
969	long ii, k = 0;
970	UINT32 * h1;
971	char * new = NULL;
972
973	if (0 != sl_is_suid())
974	{
975	fprintf(stderr, _("ERROR: insufficient privilege\n"));
976	_exit (EXIT_FAILURE);
977	/@notreached@/
978	return -1; /* braindead MAC OSX compiler needs this */
979	}
980
981	if (new_in == NULL \|\| new_in[0] == '\0')
982	{
983	fprintf(stderr,
984	_("ERROR: no key given\n Argument must be 'key@path'\n"));
985	_exit (EXIT_FAILURE);
986	/@notreached@/
987	return -1;
988	}
989
990	if (NULL == (new = malloc(strlen(new_in) + 1)))
991	goto bail_mem;
992	sl_strncpy(new, new_in, strlen(new_in) + 1);
993
994	key = new;
995	len = strlen(new);
996	for (i = 1; i < (len-2); ++i)
997	{
998	if (new[i] == '@' && new[i+1] == '/')
999	{
1000	j = i+1; new[i] = '\0'; break;
1001	}
1002	}
1003	if (j == 0)
1004	{
1005	fprintf(stderr,
1006	_("ERROR: no path to executable given\n Argument must be 'key@path'\n"));
1007	free(new);
1008	_exit (EXIT_FAILURE);
1009	/@notreached@/
1010	return -1;
1011	}
1012	else
1013	path = &new[j];
1014
1015	len = strlen(path) + 1 + 4;
1016	/@-usedef@/
1017	if (NULL == (outpath = malloc(len)))
1018	goto bail_mem;
1019	/@-usedef@/
1020	sl_snprintf (outpath, len, _("%s.out"), path);
1021
1022	fp = sl_open_read(path, SL_NOPRIV);
1023	if (SL_ISERROR(fp))
1024	{
1025	fprintf(stderr,
1026	_("ERROR: cannot open %s for read (errnum = %ld)\n"), path, fp);
1027	free(new); free (outpath);
1028	_exit (EXIT_FAILURE);
1029	/@notreached@/
1030	return -1;
1031	}
1032
1033	fout = sl_open_write(outpath, SL_NOPRIV);
1034	if (SL_ISERROR(fout))
1035	{
1036	fprintf(stderr,
1037	_("ERROR: cannot open %s (errnum = %ld)\n"), outpath, fout);
1038	free(new); free (outpath);
1039	_exit (EXIT_FAILURE);
1040	/@notreached@/
1041	return -1;
1042	}
1043
1044
1045	image = malloc (4096);
1046	if (!image)
1047	goto bail_mem;
1048	while (0 < (ii = sl_read (fp, &image[s], 4096)))
1049	{
1050	ilen += ii;
1051	s += 4096;
1052	image = realloc (image, (size_t) (4096 + s));
1053	if (!image)
1054	goto bail_mem;
1055	}
1056
1057	printf(_("%ld bytes read\n"), ilen);
1058
1059
1060	for (k = 0; k < (ilen - 8); ++k)
1061	{
1062	if (image[k] == new_key[0] &&
1063	image[k+1] == new_key[1] &&
1064	image[k+2] == new_key[2] &&
1065	image[k+3] == new_key[3] &&
1066	image[k+4] == new_key[4] &&
1067	image[k+5] == new_key[5] &&
1068	image[k+6] == new_key[6] &&
1069	image[k+7] == new_key[7])
1070	{
1071	printf(_("old key found\n"));
1072	h1 = sh_tiger_hash_uint32 (key, TIGER_DATA,
1073	(unsigned long)strlen(key));
1074	copy_four( (unsigned char *) &(image[k]), h1[0]);
1075	copy_four( (unsigned char *) &(image[k+4]), h1[1]);
1076	(void) sl_write (fout, image, ilen);
1077	(void) sl_close (fout);
1078	printf(_("new file %s written\n"), outpath);
1079	free(new); free (outpath); free(image);
1080	_exit (EXIT_SUCCESS);
1081	/@notreached@/
1082	return 0;
1083	}
1084	}
1085
1086	fprintf(stderr,
1087	_("ERROR: old key not found\n"));
1088	free(new); free (outpath); free(image);
1089	_exit (EXIT_FAILURE);
1090	/@notreached@/
1091	return -1;
1092
1093
1094	bail_mem:
1095	fprintf(stderr,
1096	_("ERROR: out of memory\n"));
1097	if (new) free(new);
1098	if (outpath) free (outpath);
1099	if (image) free (image);
1100	_exit (EXIT_FAILURE);
1101	/@notreached@/
1102	return -1;
1103	}
1104
1105
1106
1107
1108	/* A simple en-/decoder, based on Vernam cipher. We use the
1109	* message as salt to hide the key by obtaining a different one-time
1110	* pad each time.
1111	* Should be safe against a listener on the network, but not against someone
1112	* with read access to the binary.
1113	*/
1114	void sh_util_encode (char * data, char * salt, int mode, char fill)
1115	{
1116	static char cc1[17] = N_("0123456789ABCDEF");
1117	char cc[17] = "\0";
1118	register int i, j, j1 = 0, j2 = 0, j3;
1119	char * dez;
1120
1121	SL_ENTER(_("sh_util_encode"));
1122
1123	/* init
1124	*/
1125	(void) sl_strlcpy( cc, _(cc1), sizeof(cc));
1126
1127	/* max 128 bits keyspace
1128	*/
1129	memset (skey->vernam, (int)fill, KEY_LEN+1);
1130
1131	dez = (char *) &(skey->ErrFlag[0]);
1132	sh_util_cpylong (skey->vernam, dez, 4);
1133	dez = (char *) &(skey->ErrFlag[1]);
1134	sh_util_cpylong (&skey->vernam[4], dez, 4);
1135
1136	skey->vernam[KEY_LEN] = '\0';
1137
1138	(void) sl_strlcpy(skey->vernam,
1139	sh_tiger_hash(skey->vernam, TIGER_DATA, KEY_LEN),
1140	KEY_LEN+1);
1141
1142	(void) sl_strlcpy(skey->vernam,
1143	sh_util_hmac_tiger (skey->vernam, salt, strlen(salt)),
1144	KEY_LEN+1);
1145
1146	(void) sl_strlcpy(skey->vernam,
1147	sh_util_hmac_tiger (skey->vernam, (char*) new_key, 8),
1148	KEY_LEN+1);
1149
1150	/* The following routine adds/subtracts data[j] and vernam[j] mod 16.
1151	*/
1152	j = 0;
1153	while (j < KEY_LEN)
1154	{
1155	for (i = 0; i < 16; ++i)
1156	{
1157	if (cc[i] == data[j]) j1 = i;
1158	if (cc[i] == skey->vernam[j]) j2 = i;
1159	}
1160	if (mode == 0)
1161	{
1162	j3 = j1 + j2;
1163	if (j3 > 15) j3 -= 16;
1164	data[j] = cc[j3];
1165	}
1166	else
1167	{
1168	j3 = j1 - j2;
1169	if (j3 < 0) j3 += 16;
1170	data[j] = cc[j3];
1171	}
1172	++j;
1173	}
1174	SL_RET0(_("sh_util_encode"));
1175	}
1176
1177	/* server mode
1178	*/
1179	int sh_util_setserver (const char * dummy)
1180	{
1181	SL_ENTER(_("sh_util_setserver"));
1182
1183	(void) dummy;
1184	sh.flag.isserver = GOOD;
1185	SL_RETURN((0),_("sh_util_setserver"));
1186	}
1187
1188
1189	int sh_util_setlooptime (const char * str)
1190	{
1191	int i = atoi (str);
1192
1193	SL_ENTER(_("sh_util_setlooptime"));
1194
1195	if (i >= 0 && i < INT_MAX) {
1196	sh.looptime = i;
1197	SL_RETURN((0),_("sh_util_setlooptime"));
1198	} else {
1199	sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
1200	_("loop time"), str);
1201	SL_RETURN((-1),_("sh_util_setlooptime"));
1202	}
1203	}
1204
1205	#if defined (SH_WITH_CLIENT) \|\| defined (SH_STANDALONE)
1206	int sh_util_setchecksum (const char * str)
1207	{
1208	static int reject = 0;
1209
1210	SL_ENTER(_("sh_util_setchecksum"));
1211
1212	if (reject == 1)
1213	SL_RETURN((0), _("sh_util_setchecksum"));
1214	reject = 1;
1215
1216	if (sl_strncmp (str, _("init"), sizeof("init")-1) == 0)
1217	{
1218	sh.flag.checkSum = SH_CHECK_INIT;
1219	}
1220	else if (sl_strncmp (str, _("update"), sizeof("update")-1) == 0)
1221	{
1222	if (S_TRUE == file_is_remote())
1223	{
1224	sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
1225	_("checksum testing"), str);
1226	SL_RETURN((-1), _("sh_util_setchecksum"));
1227	}
1228	else
1229	{
1230	sh.flag.checkSum = SH_CHECK_CHECK;
1231	sh.flag.update = S_TRUE;
1232	}
1233	}
1234	else if (sl_strncmp (str, _("check"), sizeof("check")-1) == 0)
1235	{
1236	sh.flag.checkSum = SH_CHECK_CHECK;
1237	}
1238	/*
1239	else if (sl_strncmp (str, _("update"), sizeof("update")-1) == 0)
1240	{
1241	sh.flag.checkSum = SH_CHECK_INIT;
1242	sh.flag.update = S_TRUE;
1243	}
1244	*/
1245	else if (sl_strncmp (str, _("none"), sizeof("none")-1) == 0)
1246	{
1247	sh.flag.checkSum = SH_CHECK_NONE;
1248	}
1249	else
1250	{
1251	sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
1252	_("checksum testing"), str);
1253	SL_RETURN((-1), _("sh_util_setchecksum"));
1254	}
1255	SL_RETURN((0), _("sh_util_setchecksum"));
1256	}
1257	#endif
1258
1259	/@+charint@/
1260	unsigned char TcpFlag[8][PW_LEN+1] = {
1261	#if (POS_TF == 1)
1262	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1263	#endif
1264	{ 0xFF,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xFF,0x00 },
1265	#if (POS_TF == 2)
1266	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1267	#endif
1268	{ 0xFF,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xFF,0x00 },
1269	#if (POS_TF == 3)
1270	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1271	#endif
1272	{ 0xFF,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xFF,0x00 },
1273	#if (POS_TF == 4)
1274	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1275	#endif
1276	{ 0xFF,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xFF,0x00 },
1277	#if (POS_TF == 5)
1278	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1279	#endif
1280	{ 0xFF,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xFF,0x00 },
1281	#if (POS_TF == 6)
1282	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1283	#endif
1284	{ 0xFF,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xFF,0x00 },
1285	#if (POS_TF == 7)
1286	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1287	#endif
1288	{ 0xFF,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xFF,0x00 },
1289	#if (POS_TF == 8)
1290	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1291	#endif
1292	};
1293	/@-charint@/
1294
1295	/* initialize a key to a random value
1296	* rev 0.8
1297	*/
1298	int sh_util_keyinit (char * buf, long size)
1299	{
1300	UINT32 bufy[6];
1301	int i;
1302	int status = 0;
1303	char * p;
1304
1305	SL_ENTER(_("sh_util_keyinit"));
1306
1307	ASSERT((size <= KEY_LEN+1), _("size <= KEY_LEN+1"))
1308
1309	if (size > KEY_LEN+1)
1310	size = KEY_LEN+1;
1311
1312	/* seed / re-seed the PRNG if required
1313	*/
1314	status = taus_seed ();
1315
1316	if (status == -1)
1317	sh_error_handle ((-1), FIL__, __LINE__, -1, MSG_ES_KEY1,
1318	_("taus_seed"));
1319
1320	for (i = 0; i < 6; ++i)
1321	bufy[i] = taus_get(&(skey->rng0[0]), &(skey->rng1[0]), &(skey->rng2[0]));
1322
1323	p = sh_tiger_hash ((char *) bufy, TIGER_DATA,
1324	(unsigned long)(6*sizeof(UINT32)));
1325	p[size-1] = '\0';
1326
1327	i = sl_strlcpy(buf, p, (size_t)size);
1328
1329	memset (bufy, 0, 6*sizeof(UINT32));
1330
1331	if ((status == 0) && (!SL_ISERROR(i)) )
1332	SL_RETURN((0),_("sh_util_keyinit"));
1333
1334	if (SL_ISERROR(i))
1335	sh_error_handle ((-1), FIL__, __LINE__, i, MSG_ES_KEY2,
1336	_("sl_strlcpy"));
1337
1338	SL_RETURN((-1),_("sh_util_keyinit"));
1339	}
1340
1341	#if defined(SH_WITH_CLIENT) \|\| defined(SH_STANDALONE)
1342
1343	static unsigned char sh_obscure_index[256];
1344
1345	int sh_util_obscure_ok (const char * str)
1346	{
1347	unsigned long i;
1348	char * endptr = NULL;
1349
1350	SL_ENTER(_("sh_util_obscure_ok"));
1351
1352	if (0 == sl_strncmp("all", str, 3))
1353	{
1354	for (i = 0; i < 255; ++i)
1355	{
1356	sh_obscure_index[i] = (unsigned char)1;
1357	}
1358	SL_RETURN(0, _("sh_util_obscure_ok"));
1359	}
1360
1361	for (i = 0; i < 255; ++i)
1362	{
1363	sh_obscure_index[i] = (unsigned char)0;
1364	}
1365
1366	i = strtoul (str, &endptr, 0);
1367	if (i > 255)
1368	{
1369	SL_RETURN(-1, _("sh_util_obscure_ok"));
1370	}
1371	sh_obscure_index[i] = (unsigned char)1;
1372	if (*endptr == ',')
1373	++endptr;
1374
1375	while (*endptr != '\0')
1376	{
1377	i = strtoul (endptr, &endptr, 0);
1378	if (i > 255)
1379	{
1380	SL_RETURN(-1, _("sh_util_obscure_ok"));
1381	}
1382	sh_obscure_index[i] = (unsigned char)1;
1383	if (*endptr == ',')
1384	++endptr;
1385	}
1386	SL_RETURN(0, _("sh_util_obscure_ok"));
1387	}
1388
1389	int sh_util_obscurename (ShErrLevel level, char * name_orig, int flag)
1390	{
1391	unsigned char * name = (unsigned char *) name_orig;
1392	char * safe;
1393	unsigned int i;
1394
1395	SL_ENTER(_("sh_util_obscurename"));
1396
1397	ASSERT_RET((name != NULL), _("name != NULL"), (0))
1398
1399	/* -- Check name. --
1400	*/
1401	while (*name != '\0')
1402	{
1403	if ( (name) > 0x7F \|\| (name) == '"' \|\| (*name) == '\t' \|\|
1404	(name) == '\b' \|\| (name) == '\f' \|\|
1405	(name) == '\n' \|\| (name) == '\r' \|\|
1406	(name) == '\v' \|\| iscntrl((int) name) \|\|
1407	((name) != ' ' && !isgraph ((int) name)) )
1408	{
1409	i = (unsigned char) *name;
1410	if (sh_obscure_index[i] != (unsigned char)1)
1411	{
1412	if (flag == S_TRUE)
1413	{
1414	safe = sh_util_safe_name (name_orig);
1415	sh_error_handle (level, FIL__, __LINE__, 0, MSG_FI_OBSC,
1416	safe);
1417	SH_FREE(safe);
1418	}
1419	SL_RETURN((-1),_("sh_util_obscurename"));
1420	}
1421	}
1422	name++;
1423	}
1424
1425	SL_RETURN((0),_("sh_util_obscurename"));
1426	}
1427	#endif
1428
1429	/* returns freshly allocated memory, return value should be free'd
1430	*/
1431	char * sh_util_dirname(const char * fullpath)
1432	{
1433	char * retval;
1434	size_t len;
1435
1436	SL_ENTER(_("sh_util_dirname"));
1437
1438	ASSERT_RET ((fullpath != NULL), _("fullpath != NULL"), (NULL))
1439
1440	len = sl_strlen (fullpath); /* fullpath[i] is terminating '\0' */
1441
1442	if (len > 1 && fullpath[len-1] == '/') /* skip trailing '/' */
1443	--len;
1444
1445	while (len > 0) {
1446	--len;
1447	if (fullpath[len] == '/')
1448	{
1449	if (len == 0) ++len; /* copy the '/' to output */
1450	break;
1451	}
1452	}
1453
1454	/* -- Not an absolute path. --
1455	*/
1456	if ((len == 0) && (fullpath[len] != '/'))
1457	{
1458	SL_RETURN(NULL, _("sh_util_dirname"));
1459	}
1460
1461	retval = SH_ALLOC(len + 1);
1462	(void) sl_strlcpy (retval, fullpath, len+1);
1463
1464	SL_RETURN(retval, _("sh_util_dirname"));
1465	}
1466
1467	/* returns freshly allocated memory, return value should be free'd
1468	*/
1469	char * sh_util_basename(const char * fullpath)
1470	{
1471	char * retval = NULL;
1472	char * tmp;
1473	char * c;
1474	size_t len;
1475
1476	SL_ENTER(_("sh_util_basename"));
1477
1478	ASSERT_RET ((fullpath != NULL), _("fullpath != NULL"), (NULL))
1479
1480	c = strrchr(fullpath, '/');
1481	len = sl_strlen (c);
1482
1483	if (c == fullpath)
1484	{
1485	if (len <= 1)
1486	retval = sh_util_strdup(c);
1487	else
1488	retval = sh_util_strdup(++c);
1489	}
1490	else
1491	{
1492	if (len > 1)
1493	{
1494	retval = sh_util_strdup(++c);
1495	}
1496	else
1497	{
1498	/* input ends in '/' */
1499	tmp = sh_util_strdup(fullpath);
1500	tmp[strlen(tmp)-1] = '\0';
1501	retval = sh_util_basename(tmp);
1502	SH_FREE(tmp);
1503	}
1504	}
1505
1506	SL_RETURN(retval, _("sh_util_basename"));
1507	}
1508
1509
1510	/* returns freshly allocated memory, return value should be free'd
1511	*/
1512	char * sh_util_safe_name (const char * name)
1513	{
1514	register int i = 0;
1515	const char * p;
1516	char * retval;
1517	char oct[32];
1518	char format[16];
1519	size_t len;
1520
1521	SL_ENTER(_("sh_util_safe_name"));
1522
1523	if (name == NULL)
1524	{
1525	/* return an allocated array
1526	*/
1527	retval = SH_ALLOC(7);
1528	(void) sl_strlcpy(retval, _("(null)"), 7);
1529	SL_RETURN(retval, _("sh_util_safe_name"));
1530	}
1531
1532	/*
1533	ASSERT_RET ((name != NULL), _("name != NULL"), _("NULL"))
1534	*/
1535
1536	len = sl_strlen(name);
1537	p = name;
1538
1539	#ifdef SH_USE_XML
1540	if (sl_ok_muls (6, len) && sl_ok_adds ((6*len), 2))
1541	{ retval = SH_ALLOC(6 * len + 2); }
1542	else
1543	{
1544	/* return an allocated array
1545	*/
1546	retval = SH_ALLOC(11);
1547	(void) sl_strlcpy(retval, _("(overflow)"), 11);
1548	SL_RETURN(retval, _("sh_util_safe_name"));
1549	}
1550	#else
1551	if (sl_ok_muls (4, len) && sl_ok_adds ((4*len), 2))
1552	{ retval = SH_ALLOC(4 * len + 2); }
1553	else
1554	{
1555	/* return an allocated array
1556	*/
1557	retval = SH_ALLOC(11);
1558	(void) sl_strlcpy(retval, _("(overflow)"), 11);
1559	SL_RETURN(retval, _("sh_util_safe_name"));
1560	}
1561	#endif
1562
1563	(void) sl_strncpy(format, _("%c%03o"), 16);
1564
1565	while (*p != '\0') {
1566	/* Most frequent cases first
1567	*/
1568	if ( ((p) >= 'a' && (p) <= 'z') \|\| ((p) == '/') \|\| ((p) == '.') \|\|
1569	((p) >= '0' && (p) <= '9') \|\|
1570	((p) >= 'A' && (p) <= 'Z')) {
1571	retval[i] = *p;
1572	} else if ( (p) == '\\') { / backslash */
1573	retval[i] = '\\'; ++i;
1574	retval[i] = '\\';
1575	} else if ( (p) == '\n') { / newline */
1576	retval[i] = '\\'; ++i;
1577	retval[i] = 'n';
1578	} else if ( (p) == '\b') { / backspace */
1579	retval[i] = '\\'; ++i;
1580	retval[i] = 'b';
1581	} else if ( (p) == '\r') { / carriage return */
1582	retval[i] = '\\'; ++i;
1583	retval[i] = 'r';
1584	} else if ( (p) == '\t') { / horizontal tab */
1585	retval[i] = '\\'; ++i;
1586	retval[i] = 't';
1587	} else if ( (p) == '\v') { / vertical tab */
1588	retval[i] = '\\'; ++i;
1589	retval[i] = 'v';
1590	} else if ( (p) == '\f') { / form-feed */
1591	retval[i] = '\\'; ++i;
1592	retval[i] = 'f';
1593	#ifdef WITH_DATABASE
1594	} else if ( (p) == '\'') { / single quote */
1595	retval[i] = '\\'; ++i;
1596	retval[i] = '\'';
1597	#endif
1598	} else if ( (p) == ' ') { / space */
1599	retval[i] = '\\'; ++i;
1600	retval[i] = ' ';
1601	#ifdef SH_USE_XML
1602	} else if ( (p) == '"') { / double quote */
1603	retval[i] = '&'; ++i;
1604	retval[i] = 'q'; ++i;
1605	retval[i] = 'u'; ++i;
1606	retval[i] = 'o'; ++i;
1607	retval[i] = 't'; ++i;
1608	retval[i] = ';';
1609	} else if ( (p) == '&') { / ampersand */
1610	retval[i] = '&'; ++i;
1611	retval[i] = 'a'; ++i;
1612	retval[i] = 'm'; ++i;
1613	retval[i] = 'p'; ++i;
1614	retval[i] = ';';
1615	} else if ( (p) == '<') { / left angle */
1616	retval[i] = '&'; ++i;
1617	retval[i] = 'l'; ++i;
1618	retval[i] = 't'; ++i;
1619	retval[i] = ';';
1620	} else if ( (p) == '>') { / right angle */
1621	retval[i] = '&'; ++i;
1622	retval[i] = 'g'; ++i;
1623	retval[i] = 't'; ++i;
1624	retval[i] = ';';
1625	#else
1626	} else if ( (p) == '"') { / double quote */
1627	retval[i] = '\\'; ++i;
1628	retval[i] = '\"';
1629	#endif
1630	} else if (!isgraph ((int) p)) { / not printable */
1631	/@-bufferoverflowhigh -formatconst@/
1632	/* flawfinder: ignore */
1633	sprintf(oct, format, '\\', /* known to fit */
1634	(unsigned char) *p);
1635	/@+bufferoverflowhigh +formatconst@/
1636	retval[i] = oct[0]; ++i;
1637	retval[i] = oct[1]; ++i;
1638	retval[i] = oct[2]; ++i;
1639	retval[i] = oct[3];
1640	} else {
1641	retval[i] = *p;
1642	}
1643	++p;
1644	++i;
1645	}
1646	retval[i] = '\0';
1647	SL_RETURN(retval, _("sh_util_safe_name"));
1648	}
1649
1650	int sh_util_isnum (char *str)
1651	{
1652	char *p = str;
1653
1654	SL_ENTER(_("sh_util_isnum"));
1655
1656	ASSERT_RET ((str != NULL), _("str != NULL"), (-1))
1657
1658	while (p) {
1659	if (!isdigit((int) *p) )
1660	SL_RETURN((-1), _("sh_util_isnum"));
1661	++p;
1662	}
1663	SL_RETURN((0), _("sh_util_isnum"));
1664	}
1665
1666	char * sh_util_strconcat (const char * arg1, ...)
1667	{
1668	size_t length, l2;
1669	char * s;
1670	char * strnew;
1671	va_list vl;
1672
1673	SL_ENTER(_("sh_util_strconcat"));
1674
1675	ASSERT_RET ((arg1 != NULL), _("arg1 != NULL"), (NULL))
1676
1677	length = sl_strlen (arg1) + 1;
1678
1679	va_start (vl, arg1);
1680	s = va_arg (vl, char * );
1681	while (s != NULL)
1682	{
1683	l2 = sl_strlen (s);
1684	if (sl_ok_adds(length, l2))
1685	length += l2;
1686	else
1687	SL_RETURN(NULL, _("sh_util_strconcat"));
1688	s = va_arg (vl, char * );
1689	}
1690	va_end (vl);
1691
1692	if (sl_ok_adds(length, 2))
1693	strnew = SH_ALLOC( length + 2 );
1694	else
1695	SL_RETURN(NULL, _("sh_util_strconcat"));
1696
1697	strnew[0] = '\0';
1698
1699	(void) sl_strlcpy (strnew, arg1, length + 2);
1700
1701	va_start (vl, arg1);
1702	s = va_arg (vl, char * );
1703	while (s)
1704	{
1705	(void) sl_strlcat (strnew, s, length + 2);
1706	s = va_arg (vl, char * );
1707	}
1708	va_end (vl);
1709
1710	SL_RETURN(strnew, _("sh_util_strconcat"));
1711	}
1712
1713
1714	#ifdef HAVE_REGEX_H
1715
1716	#include <regex.h>
1717
1718	int sh_util_regcmp (char * regex_str, char * in_str)
1719	{
1720	#if defined(REG_ESPACE)
1721	int status = REG_ESPACE;
1722	#else
1723	int status = -1;
1724	#endif
1725	regex_t preg;
1726	char * errbuf;
1727
1728	SL_ENTER(_("sh_util_regcmp"));
1729
1730	status = regcomp(&preg, regex_str, REG_NOSUB\|REG_EXTENDED);
1731
1732	if (status == 0)
1733	{
1734	if ((status = regexec(&preg, in_str, 0, NULL, 0)) == 0)
1735	{
1736	regfree (&preg);
1737	SL_RETURN((0), _("sh_util_regcmp"));
1738	}
1739	}
1740
1741	if (status != 0 && status != REG_NOMATCH)
1742	{
1743	errbuf = SH_ALLOC(BUFSIZ);
1744	(void) regerror(status, &preg, errbuf, BUFSIZ);
1745	errbuf[BUFSIZ-1] = '\0';
1746	sh_error_handle ((-1), FIL__, __LINE__, status, MSG_E_REGEX,
1747	errbuf, regex_str);
1748	SH_FREE(errbuf);
1749	}
1750
1751	regfree (&preg);
1752	SL_RETURN((-1), _("sh_util_regcmp"));
1753	}
1754
1755	#endif
1756
1757
1758
1759
1760
1761
1762
1763

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