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source: trunk/src/sh_utils.c@ 18

Last change on this file since 18 was 13, checked in by rainer, 19 years ago
minor optimization
File size: 38.2 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(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(char * str)
104	{
105	if (str == NULL)
106	sh_ask_update = S_TRUE;
107	else
108	sh_ask_update = S_TRUE;
109
110	sh_unix_setnodeamon(NULL);
111
112	return 0;
113	}
114
115	#if !defined(STDIN_FILENO)
116	#define STDIN_FILENO 0
117	#endif
118	#if !defined(STDERR_FILENO)
119	#define STDERR_FILENO 0
120	#endif
121
122	int sh_util_ask_update(char * path)
123	{
124	int inchar, c;
125	int i = S_TRUE;
126	char * tmp = NULL;
127
128	SL_ENTER(_("sh_util_ask_update"));
129
130	if (sh_ask_update != S_TRUE)
131	{
132	SL_RETURN(i, _("sh_util_ask_update"));
133	}
134
135	#ifdef HAVE_TTYNAME
136	if (!ttyname(STDIN_FILENO))
137	{
138	if (NULL != ttyname(STDERR_FILENO))
139	{
140	if (NULL == freopen(ttyname(STDERR_FILENO), "r", stdin))
141	{
142	sh_error_handle ((-1), FIL__, __LINE__, 0,
143	MSG_E_SUBGEN,
144	_("Cannot continue: stdin is not a terminal"),
145	_("sh_util_ask_update"));
146	exit(EXIT_FAILURE);
147	}
148	}
149	else
150	{
151	sh_error_handle ((-1), FIL__, __LINE__, 0,
152	MSG_E_SUBGEN,
153	_("Cannot continue: stdin is not a terminal"),
154	_("sh_util_ask_update"));
155	exit(EXIT_FAILURE);
156	}
157	}
158	#endif
159
160	if (sh_ask_update == S_TRUE)
161	{
162	tmp = sh_util_safe_name (path);
163	fprintf (stderr, _("Update %s [Y/n] ? "), tmp);
164	SH_FREE(tmp);
165	while (1 == 1)
166	{
167	c = fgetc(stdin); inchar = c;
168	/@+charintliteral@/
169	while (c != '\n' && c != EOF)
170	c = fgetc(stdin);
171	/* fprintf(stderr, "CHAR (1): %c\n", inchar); */
172	if (inchar == 'Y' \|\| inchar == 'y' \|\| inchar == '\n')
173	{
174	break;
175	}
176	else if (inchar == 'n' \|\| inchar == 'N')
177	{
178	i = S_FALSE;
179	break;
180	}
181	else
182	{
183	fprintf(stderr, _("Please answer y(es) or n(o)\n"));
184	}
185	/@-charintliteral@/
186	}
187	}
188
189	SL_RETURN(i, _("sh_util_ask_update"));
190	}
191
192	int sh_util_hidesetup(char * c)
193	{
194	int i;
195	SL_ENTER(_("sh_util_hidesetup"));
196	i = sh_util_flagval(c, &(sh.flag.hidefile));
197
198	SL_RETURN(i, _("sh_util_hidesetup"));
199	}
200
201	char * sh_util_strdup (const char * str)
202	{
203	char * p = NULL;
204	size_t len;
205
206	SL_ENTER(_("sh_util_strdup"));
207
208	if (str != NULL)
209	{
210	len = sl_strlen(str);
211	p = SH_ALLOC (len + 1);
212	(void) sl_strlcpy (p, str, len+1);
213	}
214	SL_RETURN( p, _("sh_util_strdup"));
215	}
216
217	/* by the eircom.net computer incident
218	* response team
219	*/
220	char * sh_util_strsep (char *str, const char delim)
221	{
222	char ret, c, *d;
223
224	SL_ENTER(_("sh_util_strsep"));
225	ret = *str;
226
227	if (ret == NULL) {
228	SL_RETURN(ret, _("sh_util_strsep"));
229	}
230
231	for (c = str; c != '\0'; c++) {
232	for (d = (char ) delim; d != '\0'; d++) {
233	if (c == d) {
234	*c = '\0';
235	*str = c + 1;
236	SL_RETURN(ret, _("sh_util_strsep"));
237	}
238	}
239	}
240
241	/* If we get to here, there's no delimiters in the string */
242	*str = NULL;
243	SL_RETURN(ret, _("sh_util_strsep"));
244	}
245
246
247	/* returned string must be free'd by caller.
248	*/
249	char * sh_util_formatted (const char * formatt, st_format * ftab)
250	{
251	struct tm * time_ptr;
252	size_t size;
253	size_t isiz;
254	char * fmt = NULL;
255	char * p;
256	char * q;
257	char * outstr;
258	int i;
259	int j;
260	time_t inpp;
261
262	char * clist[16] = { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
263	NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL };
264	int nn = 0;
265
266	SL_ENTER(_("sh_util_formatted"));
267
268	if (formatt == NULL \|\| ftab == NULL \|\| *formatt == '\0')
269	SL_RETURN(NULL, _("sh_util_formatted"));
270
271	/* -- save the format (we overwrite it !!) --
272	*/
273	size = sl_strlen(formatt);
274
275	fmt = (char *) SH_ALLOC(size + 1);
276	(void) sl_strlcpy(fmt, formatt, size + 1);
277
278	p = fmt;
279
280	j = 0;
281	while (ftab[j].fchar != '\0') {
282	if (ftab[j].type != S_FMT_STRING)
283	ftab[j].data_str = NULL;
284	++j;
285	}
286
287	while (p != NULL && *p != '\0' && NULL != (q = strchr(p, '%')))
288	{
289	++q;
290
291	/* fprintf(stderr, "p == %s q == %s\n", p, q); */
292
293	/* -- end of string is a '%' --
294	*/
295	if (*q == '\0')
296	{
297	--q;
298	*q = '\0';
299	break;
300	}
301
302	i = 0;
303	j = 0;
304
305	/* -- search the format char in input table --
306	* put (nn < 16) here -> all remaining %foo will be
307	* converted to %%
308	*/
309	while (ftab[j].fchar != '\0' && nn < 16)
310	{
311	if (ftab[j].fchar == *q)
312	{
313	/* -- Convert it to a string format (%s). --
314	*/
315	*q = 's'
316	;
317	i = 1;
318
319	switch(ftab[j].type) {
320
321	case S_FMT_STRING:
322	{
323	isiz = sl_strlen(ftab[j].data_str);
324	if (isiz > 0)
325	{
326	size += isiz;
327	clist[nn] = ftab[j].data_str;
328	++nn;
329	}
330	else
331	*q = '%';
332	goto endsrch;
333	}
334	break;
335
336	case S_FMT_ULONG:
337	{
338	ftab[j].data_str = (char *) SH_ALLOC(64);
339	/@-bufferoverflowhigh@/
340	sprintf (ftab[j].data_str, "%lu", /* known to fit */
341	ftab[j].data_ulong);
342	/@+bufferoverflowhigh@/
343	isiz = sl_strlen(ftab[j].data_str);
344	if (isiz > 0)
345	{
346	size += isiz;
347	clist[nn] = ftab[j].data_str;
348	++nn;
349	}
350	else
351	*q = '%';
352	goto endsrch;
353	}
354	break;
355
356	case S_FMT_LONG:
357	{
358	ftab[j].data_str = (char *) SH_ALLOC(64);
359	/@-bufferoverflowhigh@/
360	sprintf (ftab[j].data_str, "%ld", /* known to fit */
361	ftab[j].data_long);
362	/@+bufferoverflowhigh@/
363	isiz = sl_strlen(ftab[j].data_str);
364	if (isiz > 0)
365	{
366	size += isiz;
367	clist[nn] = ftab[j].data_str;
368	++nn;
369	}
370	else
371	*q = '%';
372	goto endsrch;
373	}
374	break;
375
376	case S_FMT_TIME:
377	{
378	ftab[j].data_str = (char *) SH_ALLOC(64);
379	inpp = (time_t)ftab[j].data_ulong;
380	if (inpp != 0)
381	{
382	time_ptr = localtime (&(inpp));
383	if (time_ptr != NULL)
384	(void) strftime(ftab[j].data_str, 64,
385	_("%d-%m-%Y %H:%M:%S"), time_ptr);
386	else
387	(void) sl_strlcpy(ftab[j].data_str,
388	_("00-00-0000 00:00:00"), 64);
389	}
390	else
391	{
392	(void) sl_strlcpy(ftab[j].data_str,
393	_("(None)"), 64);
394	}
395	isiz = sl_strlen(ftab[j].data_str);
396	if (isiz > 0)
397	{
398	size += isiz;
399	clist[nn] = ftab[j].data_str;
400	++nn;
401	}
402	else
403	*q = '%';
404	goto endsrch;
405	}
406	break;
407
408	default:
409	/* do nothing */;
410	}
411
412	}
413	++j;
414	}
415
416	endsrch:
417
418	p = q;
419
420	/* -- not found -- */
421	if (i == 0)
422	{
423	*q = '%';
424	++p;
425	}
426
427	}
428
429	/* -- Format string evaluated.
430	clist[] List of strings
431	size Total size of format string + clist[] strings
432	-- */
433
434	/* -- closing '\0' --
435	*/
436	size++;
437	outstr = (char *) SH_ALLOC(size);
438
439	/* -- print it --
440	*/
441	(void) sl_snprintf( outstr, size, fmt,
442	clist[0], clist[1], clist[2], clist[3],
443	clist[4], clist[5], clist[6], clist[7],
444	clist[8], clist[9], clist[10], clist[11],
445	clist[12], clist[13], clist[14], clist[15]);
446
447	/* -- cleanup --
448	*/
449	j = 0;
450	while (ftab[j].fchar != '\0') {
451	if (ftab[j].type != S_FMT_STRING && ftab[j].data_str != NULL)
452	SH_FREE(ftab[j].data_str);
453	++j;
454	}
455	SH_FREE(fmt);
456
457	SL_RETURN(outstr, _("sh_util_formatted"));
458	}
459
460	/* can't inline (AIX)
461	*/
462	int sh_util_hexchar( const char c )
463	{
464	/@+charint@/
465	if ( c >= '0' && c <= '9' )
466	return c - '0';
467	else if ( c >= 'a' && c <= 'f' )
468	return c - 'a' + 10;
469	else if ( c >= 'A' && c <= 'F' )
470	return c - 'A' + 10;
471	else return -1;
472	/@-charint@/
473	}
474
475	/* read a hexadecimal key, convert to binary
476	*/
477	int sh_util_hextobinary (char * binary, const char * hex, int bytes)
478	{
479	int i = 0, j, k, l = 0;
480	char c;
481
482	#define SH_HEXCHAR(x, y) \
483	c = (x); \
484	if ( c >= '0' && c <= '9' ) \
485	y = c - '0'; \
486	else if ( c >= 'a' && c <= 'f' ) \
487	y = c - 'a' + 10; \
488	else if ( c >= 'A' && c <= 'F' ) \
489	y = c - 'A' + 10; \
490	else \
491	SL_RETURN((-1), _("sh_util_hextobinary"))
492
493
494	SL_ENTER(_("sh_util_hextobinary"));
495
496	while (i < bytes)
497	{
498	SH_HEXCHAR(hex[i], k);
499	SH_HEXCHAR(hex[i+1], j);
500
501	binary[l] = (char)(k * 16 + j);
502	++l; i+= 2;
503
504	/* k = sh_util_hexchar(hex[i]); j = sh_util_hexchar(hex[i+1]);
505	if (k != -1 && j != -1)
506	{
507	binary[l] = (char)(k * 16 + j);
508	++l; i+= 2;
509	}
510	else
511	{
512	SL_RETURN((-1), _("sh_util_hextobinary"));
513	}
514	*/
515	}
516
517	SL_RETURN((0), _("sh_util_hextobinary"));
518	}
519
520	static void copy_four (unsigned char * dest, UINT32 in)
521	{
522	UINT32 i, j;
523	int count;
524
525	SL_ENTER(_("copy_four"));
526	for (count = 0; count < 4; ++count)
527	{
528	i = in / 256;
529	j = in - (i*256);
530	dest[count] = (unsigned char) j;
531	in = i;
532	}
533	SL_RET0(_("copy_four"));
534	}
535
536	/* compute HMAC-TIGER
537	*/
538	static char * sh_util_hmac_tiger (char * hexkey,
539	char * text, size_t textlen)
540	{
541	static char opad[KEY_BLOCK] = {
542	(char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C,
543	(char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C,
544	(char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C,
545	(char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C
546	};
547	static char ipad[KEY_BLOCK] = {
548	(char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36,
549	(char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36,
550	(char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36,
551	(char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36
552	};
553	static char zap[KEY_BLOCK] = {
554	(char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00,
555	(char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00,
556	(char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00,
557	(char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00
558	};
559	char K[KEY_BLOCK];
560	char outer[KEY_BLOCK];
561	char * inner;
562	UINT32 * h1;
563	UINT32 * h2;
564	UINT32 cc[KEY_LEN/4];
565	char * res;
566
567	size_t i;
568
569	SL_ENTER(_("sh_util_hmac_tiger"));
570	ASSERT((KEY_BLOCK <= (KEY_LEN/2)), _("KEY_BLOCK <= (KEY_LEN/2)"))
571
572	if (KEY_BLOCK > (KEY_LEN/2))
573	{
574	res = sh_tiger_hash (NULL, TIGER_DATA, 0);
575	SL_RETURN(res, _("sh_util_hmac_tiger"));
576	}
577
578	memcpy (K, zap, KEY_BLOCK);
579
580	if (sh_util_hextobinary (K, hexkey, KEY_LEN) < 0)
581	{
582	res = sh_tiger_hash (NULL, TIGER_DATA, 0);
583	SL_RETURN(res, _("sh_util_hmac_tiger"));
584	}
585
586	inner = (char *) SH_ALLOC (textlen + KEY_BLOCK);
587
588	for (i = 0; i < KEY_BLOCK; ++i)
589	{
590	outer[i] = K[i] ^ opad[i];
591	inner[i] = K[i] ^ ipad[i];
592	}
593	for (i = KEY_BLOCK; i < (KEY_BLOCK+textlen); ++i)
594	{
595	inner[i] = text[i - KEY_BLOCK];
596	}
597
598	/* now compute the hash
599	*/
600	h1 = sh_tiger_hash_uint32 ( outer,
601	TIGER_DATA,
602	KEY_BLOCK);
603	for (i = 0; i < (KEY_LEN/8); ++i)
604	{
605	/* cc[i] = h1[i]; */
606	copy_four ( (unsigned char *) &(cc[i]), h1[i]);
607	}
608
609	h2 = sh_tiger_hash_uint32 ( inner,
610	TIGER_DATA,
611	(unsigned long) KEY_BLOCK+textlen);
612	for (i = KEY_LEN/8; i < (KEY_LEN/4); ++i)
613	{
614	copy_four ( (unsigned char *) &(cc[i]), h2[i - (KEY_LEN/8)]);
615	/* cc[i] = h2[i - (KEY_LEN/8)]; */
616	}
617	SH_FREE(inner);
618
619	res = sh_tiger_hash ((char *) &cc[0],
620	TIGER_DATA,
621	(unsigned long) (KEY_LEN/4 * sizeof(UINT32)));
622
623	SL_RETURN(res, _("sh_util_hmac_tiger"));
624	}
625
626	static char * sh_util_hash_tiger ( char * hexkey,
627	char * text, size_t textlen)
628	{
629	char * res;
630	char h2[2*KEY_LEN+1];
631	SL_ENTER(_("sh_util_hash_tiger"));
632
633	(void) sl_strlcpy(h2, hexkey, KEY_LEN+1);
634	(void) sl_strlcat(h2, sh_tiger_hash(text, TIGER_DATA,
635	(unsigned long) textlen), 2*KEY_LEN+1);
636
637	res = sh_tiger_hash(h2, TIGER_DATA, 2*KEY_LEN);
638
639	SL_RETURN(res, _("sh_util_hash_tiger"));
640	}
641
642	/* --- compute signature on data ---
643	*/
644	#define TYPE_HMAC 0
645	#define TYPE_HASH 1
646
647	static int sigtype = TYPE_HMAC;
648
649	int sh_util_sigtype (char * c)
650	{
651	SL_ENTER(_("sh_util_sigtype"));
652	if (c == NULL)
653	SL_RETURN( -1, _("sh_util_sigtype"));
654
655	if (0 == strcmp(_("HMAC-TIGER"), c))
656	sigtype = TYPE_HMAC;
657	else if (0 == strcmp(_("HASH-TIGER"), c))
658	sigtype = TYPE_HASH;
659	else
660	SL_RETURN( -1, _("sh_util_sigtype"));
661
662	SL_RETURN( 0, _("sh_util_sigtype"));
663	}
664
665	char * sh_util_siggen (char * hexkey,
666	char * text, size_t textlen)
667	{
668	char * p;
669
670	SL_ENTER(_("sh_util_siggen"));
671	if (sigtype == TYPE_HMAC)
672	p = sh_util_hmac_tiger (hexkey,
673	text, textlen);
674	else
675	p = sh_util_hash_tiger (hexkey,
676	text, textlen);
677	SL_RETURN(p, _("sh_util_siggen"));
678	}
679
680
681	/* a simple compressor
682	*/
683	long sh_util_compress (char * dest, char * src, size_t dest_size)
684	{
685	char * add;
686	char * get;
687	size_t count = 0;
688	size_t dest_end;
689
690	SL_ENTER(_("sh_util_compress"));
691
692	if (dest_size == 0)
693	SL_RETURN((0), _("sh_util_compress"));
694
695	if ((dest == NULL) \|\| (src == NULL))
696	SL_RETURN((0), _("sh_util_compress"));
697
698	dest_end = sl_strlen(dest);
699
700	if (dest_end > dest_size)
701	SL_RETURN((0), _("sh_util_compress"));
702
703	add = &dest[dest_end];
704	get = src;
705
706	while (count < (dest_size-dest_end))
707	{
708	if (isalnum((int) *get))
709	{
710	add = get;
711	++add;
712	++count;
713	}
714	++get;
715	if (*get == '\0' && (count < (dest_size-dest_end)))
716	/* end of src reached */
717	{
718	add = get; /* copy the '\0' */
719	break; /* and stop copying */
720	}
721	}
722
723	dest[dest_size-1] = '\0'; /* paranoia */
724	SL_RETURN(((long)count), _("sh_util_compress")); /* no of chars copied */
725	}
726
727
728	/* copy the four least significant bytes
729	*/
730	void sh_util_cpylong (char * dest, const char * src, int len )
731	{
732	int i, j;
733	union
734	{
735	long l;
736	char c[sizeof(long)];
737	} u;
738
739	SL_ENTER(_("sh_util_cpylong"));
740
741	u.l = 1;
742
743	/* MSB is first
744	*/
745	if (sizeof(long)>4 &&/@+charint@/(u.c[sizeof(long)-1] == 1)/@-charint@/)
746	{
747	j = (int) (sizeof(long)-4);
748	for (i = 0; i < j; ++i) ++src;
749	}
750
751	i = 0;
752
753	while (i < 4)
754	{
755	dest = (src);
756	++dest; ++src;
757	if (i == (len-1)) break;
758	++i;
759	}
760	SL_RET0(_("sh_util_cpylong"));
761	}
762
763	/* This is a maximally equidistributed combined Tausworthe
764	* generator. The sequence is,
765	*
766	* x_n = (s1_n ^ s2_n ^ s3_n)
767	*
768	* s1_{n+1} = (((s1_n & 4294967294) <<12) ^ (((s1_n <<13) ^ s1_n) >>19))
769	* s2_{n+1} = (((s2_n & 4294967288) << 4) ^ (((s2_n << 2) ^ s2_n) >>25))
770	* s3_{n+1} = (((s3_n & 4294967280) <<17) ^ (((s3_n << 3) ^ s3_n) >>11))
771	*
772	* computed modulo 2^32. In the three formulas above '^' means
773	* exclusive-or (C-notation), not exponentiation. Note that the
774	* algorithm relies on the properties of 32-bit unsigned integers (it
775	* is formally defined on bit-vectors of length 32).
776	*
777	* Stolen from GSL (GNU scientific library) and modified somewhat.
778	* I am using UINT32, which is guaranteed to be 32 bits. Also made
779	* sure that the initialization vector is valid.
780	*/
781
782
783	/* interval [0, 4294967296]
784	*/
785	static UINT32 taus_get_long (void *vstate)
786	{
787	UINT32 * state = (UINT32 *) vstate;
788
789	if (skey->rngI == BAD)
790	(void)taus_seed();
791
792	#define TAUSWORTHE(s,a,b,c,d) ((s &c) <<d) ^ (((s <<a) ^s) >>b)
793	/@+ignorequals@/
794	state[0] = TAUSWORTHE (state[0], 13, 19, 4294967294UL, 12);
795	state[1] = TAUSWORTHE (state[1], 2, 25, 4294967288UL, 4);
796	state[2] = TAUSWORTHE (state[2], 3, 11, 4294967280UL, 17);
797	/@-ignorequals@/
798	return (state[0] ^ state[1] ^ state[2]);
799	}
800
801	/* Hide the internal state of the PRNG by using its output as
802	* input for a one-way hash function.
803	*/
804	UINT32 taus_svec[6];
805
806	UINT32 taus_get (void state1, void state2, void *state3)
807	{
808	UINT32 retval;
809	UINT32 * res;
810	static UINT32 res_vec[6];
811	static int res_num = 0;
812	register int i;
813
814	if (res_num > 0)
815	{
816	retval = res_vec[res_num];
817	res_num = (res_num == 5) ? 0 : (res_num + 1);
818	return retval;
819	}
820
821	taus_svec[0] = taus_get_long (state1);
822	taus_svec[1] = taus_get_long (state2);
823	taus_svec[2] = taus_get_long (state3);
824	taus_svec[3] = taus_get_long (state1);
825	taus_svec[4] = taus_get_long (state2);
826	taus_svec[5] = taus_get_long (state3);
827
828	res = sh_tiger_hash_uint32 ( (char *) &taus_svec[0],
829	TIGER_DATA,
830	(unsigned long)(6 * sizeof(UINT32)));
831
832	for (i = 1; i < 6; ++i)
833	{
834	res_vec[i] = res[i];
835	}
836	retval = taus_svec[0];
837	res_num = 1;
838
839	taus_svec[0] = 0; taus_svec[1] = 0; taus_svec[2] = 0;
840	taus_svec[3] = 0; taus_svec[4] = 0; taus_svec[5] = 0;
841
842	return retval;
843	}
844
845	/* interval [0,1)
846	*/
847	double taus_get_double (void *vstate)
848	{
849	return taus_get_long (vstate) / (4294967296.0 + 1.0) ;
850	}
851
852	#define LCG(n) ((69069 * n) & 0xffffffffUL)
853
854	/* TAKE CARE: state[0], state[1], state[2] must be > 2,8,16, respectively
855	*/
856	static void taus_set_from_ulong (void *vstate, unsigned long int s)
857	{
858	UINT32 state = (UINT32 ) vstate;
859
860	if (s == 0)
861	s = 1; /* default seed is 1 */
862
863	state[0] = (UINT32)(LCG (s) \| (UINT32) 0x03);
864	state[1] = (UINT32)(LCG (state[0]) \| (UINT32) 0x09);
865	state[2] = (UINT32)(LCG (state[1]) \| (UINT32) 0x17);
866
867	/* 'warm up'
868	*/
869	(void) taus_get_long (state);
870	(void) taus_get_long (state);
871	(void) taus_get_long (state);
872	(void) taus_get_long (state);
873	(void) taus_get_long (state);
874	(void) taus_get_long (state);
875
876	return;
877	}
878
879	static void taus_set_from_state (void vstate, void init_state)
880	{
881	UINT32 state = (UINT32 ) vstate;
882	UINT32 state0 = (UINT32 ) init_state;
883
884	state[0] = state0[0] \| (UINT32) 0x03;
885	state[1] = state0[1] \| (UINT32) 0x09;
886	state[2] = state0[2] \| (UINT32) 0x17;
887
888	return;
889	}
890
891
892	int taus_seed ()
893	{
894	char bufx[9 * sizeof(UINT32) + 1];
895	int status;
896	static unsigned long seed_time = 0;
897
898	SL_ENTER(_("taus_seed"));
899
900	if (skey->rngI == GOOD)
901	{
902	if ( (sh_unix_longtime () - seed_time) < 3600)
903	SL_RETURN( (0), _("taus_seed"));
904	}
905
906	seed_time = sh_unix_longtime ();
907
908	status = sh_entropy (24, bufx);
909
910	if (!SL_ISERROR(status))
911	{
912	skey->rngI = GOOD;
913	memcpy (&skey->rng0[0], &bufx[0], 2*sizeof(UINT32));
914	memcpy (&skey->rng1[0], &bufx[2sizeof(UINT32)], 2sizeof(UINT32));
915	memcpy (&skey->rng2[0], &bufx[4sizeof(UINT32)], 2sizeof(UINT32));
916	memset (bufx, 0, 9 * sizeof(UINT32) + 1);
917
918	skey->rng0[2] = 0;
919	skey->rng1[2] = 0;
920	skey->rng2[2] = 0;
921
922	taus_set_from_state( &(skey->rng0[0]), &(skey->rng0[0]));
923	taus_set_from_state( &(skey->rng1[0]), &(skey->rng1[0]));
924	taus_set_from_state( &(skey->rng2[0]), &(skey->rng2[0]));
925
926	SL_RETURN( (0), _("taus_seed"));
927	}
928
929	sh_error_handle ((-1), FIL__, __LINE__, status, MSG_ES_ENT,
930	_("sh_entropy"));
931
932	/* emergency backup - unsafe !
933	*/
934	skey->rngI = GOOD;
935	#ifdef HAVE_GETTIMEOFDAY
936	taus_set_from_ulong ( &(skey->rng0[0]), LCG (sh_unix_notime()) );
937	#else
938	taus_set_from_ulong ( &(skey->rng0[0]), LCG (seed_time) );
939	#endif
940	taus_set_from_ulong ( &(skey->rng1[0]), LCG (skey->rng0[0]) );
941	taus_set_from_ulong ( &(skey->rng2[0]), LCG (skey->rng1[0]) );
942	skey->rngI = BAD;
943
944	SL_RETURN( (-1), _("taus_seed"));
945	}
946
947	/@+charint@/
948	static unsigned char new_key[] = { 0xA7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xA7 };
949	/@-charint@/
950	static void copy_four (unsigned char * dest, UINT32 in);
951
952	int sh_util_set_newkey (char * new)
953	{
954	size_t i, j = 0;
955	size_t len;
956	SL_TICKET fp;
957	SL_TICKET fout;
958	char * key;
959	char * path;
960	char * outpath;
961	unsigned char * image = NULL;
962	long s = 0;
963	long ilen = 0;
964	long ii, k = 0;
965	UINT32 * h1;
966
967	if (0 != sl_is_suid())
968	{
969	fprintf(stderr, _("ERROR: insufficient privilege\n"));
970	_exit (EXIT_FAILURE);
971	/@notreached@/
972	return -1; /* braindead MAC OSX compiler needs this */
973	}
974
975	if (new == NULL \|\| new[0] == '\0')
976	{
977	fprintf(stderr,
978	_("ERROR: no key given\n Argument must be 'key@path'\n"));
979	_exit (EXIT_FAILURE);
980	/@notreached@/
981	return -1;
982	}
983	key = new;
984	len = strlen(new);
985	for (i = 1; i < (len-2); ++i)
986	{
987	if (new[i] == '@' && new[i+1] == '/')
988	{
989	j = i+1; new[i] = '\0'; break;
990	}
991	}
992	if (j == 0)
993	{
994	fprintf(stderr,
995	_("ERROR: no path to executable given\n Argument must be 'key@path'\n"));
996	_exit (EXIT_FAILURE);
997	/@notreached@/
998	return -1;
999	}
1000	else
1001	path = &new[j];
1002	/@-usedef@/
1003	if (NULL == (outpath = malloc(strlen(path) + 1 + 4)))
1004	goto bail_mem;
1005	/@-usedef@/
1006	/@-bufferoverflowhigh@/
1007	sprintf (outpath, _("%s.out"), path); /* known to fit */
1008	/@+bufferoverflowhigh@/
1009
1010	fp = sl_open_read(path, SL_NOPRIV);
1011	if (SL_ISERROR(fp))
1012	{
1013	fprintf(stderr,
1014	_("ERROR: cannot open %s for read (errnum = %ld)\n"), path, fp);
1015	_exit (EXIT_FAILURE);
1016	/@notreached@/
1017	return -1;
1018	}
1019
1020	fout = sl_open_write(outpath, SL_NOPRIV);
1021	if (SL_ISERROR(fout))
1022	{
1023	fprintf(stderr,
1024	_("ERROR: cannot open %s (errnum = %ld)\n"), outpath, fout);
1025	_exit (EXIT_FAILURE);
1026	/@notreached@/
1027	return -1;
1028	}
1029
1030
1031	image = malloc (4096);
1032	if (!image)
1033	goto bail_mem;
1034	while (0 < (ii = sl_read (fp, &image[s], 4096)))
1035	{
1036	ilen += ii;
1037	s += 4096;
1038	image = realloc (image, (size_t) (4096 + s));
1039	if (!image)
1040	goto bail_mem;
1041	}
1042
1043	printf(_("%ld bytes read\n"), ilen);
1044
1045
1046	for (k = 0; k < (ilen - 8); ++k)
1047	{
1048	if (image[k] == new_key[0] &&
1049	image[k+1] == new_key[1] &&
1050	image[k+2] == new_key[2] &&
1051	image[k+3] == new_key[3] &&
1052	image[k+4] == new_key[4] &&
1053	image[k+5] == new_key[5] &&
1054	image[k+6] == new_key[6] &&
1055	image[k+7] == new_key[7])
1056	{
1057	printf(_("old key found\n"));
1058	h1 = sh_tiger_hash_uint32 (key, TIGER_DATA,
1059	(unsigned long)strlen(key));
1060	copy_four( (unsigned char *) &(image[k]), h1[0]);
1061	copy_four( (unsigned char *) &(image[k+4]), h1[1]);
1062	(void) sl_write (fout, image, ilen);
1063	(void) sl_close (fout);
1064	printf(_("new file %s written\n"), outpath);
1065	_exit (EXIT_SUCCESS);
1066	/@notreached@/
1067	return 0;
1068	}
1069	}
1070
1071	fprintf(stderr,
1072	_("ERROR: old key not found\n"));
1073	_exit (EXIT_FAILURE);
1074	/@notreached@/
1075	return -1;
1076
1077
1078	bail_mem:
1079	fprintf(stderr,
1080	_("ERROR: out of memory\n"));
1081	_exit (EXIT_FAILURE);
1082	/@notreached@/
1083	return -1;
1084	}
1085
1086
1087
1088
1089	/* A simple en-/decoder, based on Vernam cipher. We use the
1090	* message as salt to hide the key by obtaining a different one-time
1091	* pad each time.
1092	* Should be safe against a listener on the network, but not against someone
1093	* with read access to the binary.
1094	*/
1095	void sh_util_encode (char * data, char * salt, int mode, char fill)
1096	{
1097	static char cc1[17] = N_("0123456789ABCDEF");
1098	char cc[17] = "\0";
1099	register int i, j, j1 = 0, j2 = 0, j3;
1100	char * dez;
1101
1102	SL_ENTER(_("sh_util_encode"));
1103
1104	/* init
1105	*/
1106	(void) sl_strlcpy( cc, _(cc1), sizeof(cc));
1107
1108	/* max 128 bits keyspace
1109	*/
1110	memset (skey->vernam, (int)fill, KEY_LEN+1);
1111
1112	dez = (char *) &(skey->ErrFlag[0]);
1113	sh_util_cpylong (skey->vernam, dez, 4);
1114	dez = (char *) &(skey->ErrFlag[1]);
1115	sh_util_cpylong (&skey->vernam[4], dez, 4);
1116
1117	skey->vernam[KEY_LEN] = '\0';
1118
1119	(void) sl_strlcpy(skey->vernam,
1120	sh_tiger_hash(skey->vernam, TIGER_DATA, KEY_LEN),
1121	KEY_LEN+1);
1122
1123	(void) sl_strlcpy(skey->vernam,
1124	sh_util_hmac_tiger (skey->vernam, salt, strlen(salt)),
1125	KEY_LEN+1);
1126
1127	(void) sl_strlcpy(skey->vernam,
1128	sh_util_hmac_tiger (skey->vernam, (char*) new_key, 8),
1129	KEY_LEN+1);
1130
1131	/* The following routine adds/subtracts data[j] and vernam[j] mod 16.
1132	*/
1133	j = 0;
1134	while (j < KEY_LEN)
1135	{
1136	for (i = 0; i < 16; ++i)
1137	{
1138	if (cc[i] == data[j]) j1 = i;
1139	if (cc[i] == skey->vernam[j]) j2 = i;
1140	}
1141	if (mode == 0)
1142	{
1143	j3 = j1 + j2;
1144	if (j3 > 15) j3 -= 16;
1145	data[j] = cc[j3];
1146	}
1147	else
1148	{
1149	j3 = j1 - j2;
1150	if (j3 < 0) j3 += 16;
1151	data[j] = cc[j3];
1152	}
1153	++j;
1154	}
1155	SL_RET0(_("sh_util_encode"));
1156	}
1157
1158	/* server mode
1159	*/
1160	int sh_util_setserver (char * dummy)
1161	{
1162	SL_ENTER(_("sh_util_setserver"));
1163
1164	if (dummy)
1165	sh.flag.isserver = GOOD;
1166	else
1167	sh.flag.isserver = GOOD;
1168	SL_RETURN((0),_("sh_util_setserver"));
1169	}
1170
1171
1172	int sh_util_setlooptime (char * str)
1173	{
1174	int i = atoi (str);
1175
1176	SL_ENTER(_("sh_util_setlooptime"));
1177
1178	if (i >= 0 && i < INT_MAX) {
1179	sh.looptime = i;
1180	SL_RETURN((0),_("sh_util_setlooptime"));
1181	} else {
1182	sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
1183	_("loop time"), str);
1184	SL_RETURN((-1),_("sh_util_setlooptime"));
1185	}
1186	}
1187
1188	#if defined (SH_WITH_CLIENT) \|\| defined (SH_STANDALONE)
1189	int sh_util_setchecksum (char * str)
1190	{
1191	static int reject = 0;
1192
1193	SL_ENTER(_("sh_util_setchecksum"));
1194
1195	if (reject == 1)
1196	SL_RETURN((0), _("sh_util_setchecksum"));
1197	reject = 1;
1198
1199	if (sl_strncmp (str, _("init"), sizeof("init")-1) == 0)
1200	{
1201	sh.flag.checkSum = SH_CHECK_INIT;
1202	}
1203	else if (sl_strncmp (str, _("update"), sizeof("update")-1) == 0)
1204	{
1205	if (S_TRUE == file_is_remote())
1206	{
1207	sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
1208	_("checksum testing"), str);
1209	SL_RETURN((-1), _("sh_util_setchecksum"));
1210	}
1211	else
1212	{
1213	sh.flag.checkSum = SH_CHECK_CHECK;
1214	sh.flag.update = S_TRUE;
1215	}
1216	}
1217	else if (sl_strncmp (str, _("check"), sizeof("check")-1) == 0)
1218	{
1219	sh.flag.checkSum = SH_CHECK_CHECK;
1220	}
1221	/*
1222	else if (sl_strncmp (str, _("update"), sizeof("update")-1) == 0)
1223	{
1224	sh.flag.checkSum = SH_CHECK_INIT;
1225	sh.flag.update = S_TRUE;
1226	}
1227	*/
1228	else if (sl_strncmp (str, _("none"), sizeof("none")-1) == 0)
1229	{
1230	sh.flag.checkSum = SH_CHECK_NONE;
1231	}
1232	else
1233	{
1234	sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
1235	_("checksum testing"), str);
1236	SL_RETURN((-1), _("sh_util_setchecksum"));
1237	}
1238	SL_RETURN((0), _("sh_util_setchecksum"));
1239	}
1240	#endif
1241
1242	/@+charint@/
1243	unsigned char TcpFlag[8][PW_LEN+1] = {
1244	#if (POS_TF == 1)
1245	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1246	#endif
1247	{ 0xFF,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xFF,0x00 },
1248	#if (POS_TF == 2)
1249	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1250	#endif
1251	{ 0xFF,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xFF,0x00 },
1252	#if (POS_TF == 3)
1253	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1254	#endif
1255	{ 0xFF,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xFF,0x00 },
1256	#if (POS_TF == 4)
1257	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1258	#endif
1259	{ 0xFF,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xFF,0x00 },
1260	#if (POS_TF == 5)
1261	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1262	#endif
1263	{ 0xFF,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xFF,0x00 },
1264	#if (POS_TF == 6)
1265	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1266	#endif
1267	{ 0xFF,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xFF,0x00 },
1268	#if (POS_TF == 7)
1269	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1270	#endif
1271	{ 0xFF,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xFF,0x00 },
1272	#if (POS_TF == 8)
1273	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1274	#endif
1275	};
1276	/@-charint@/
1277
1278	/* initialize a key to a random value
1279	* rev 0.8
1280	*/
1281	int sh_util_keyinit (char * buf, long size)
1282	{
1283	UINT32 bufy[6];
1284	int i;
1285	int status = 0;
1286	char * p;
1287
1288	SL_ENTER(_("sh_util_keyinit"));
1289
1290	ASSERT((size <= KEY_LEN+1), _("size <= KEY_LEN+1"))
1291
1292	if (size > KEY_LEN+1)
1293	size = KEY_LEN+1;
1294
1295	/* seed / re-seed the PRNG if required
1296	*/
1297	status = taus_seed ();
1298
1299	if (status == -1)
1300	sh_error_handle ((-1), FIL__, __LINE__, -1, MSG_ES_KEY1,
1301	_("taus_seed"));
1302
1303	for (i = 0; i < 6; ++i)
1304	bufy[i] = taus_get(&(skey->rng0[0]), &(skey->rng1[0]), &(skey->rng2[0]));
1305
1306	p = sh_tiger_hash ((char *) bufy, TIGER_DATA,
1307	(unsigned long)(6*sizeof(UINT32)));
1308	p[size-1] = '\0';
1309
1310	i = sl_strlcpy(buf, p, (size_t)size);
1311
1312	memset (bufy, 0, 6*sizeof(UINT32));
1313
1314	if ((status == 0) && (!SL_ISERROR(i)) )
1315	SL_RETURN((0),_("sh_util_keyinit"));
1316
1317	if (SL_ISERROR(i))
1318	sh_error_handle ((-1), FIL__, __LINE__, i, MSG_ES_KEY2,
1319	_("sl_strlcpy"));
1320
1321	SL_RETURN((-1),_("sh_util_keyinit"));
1322	}
1323
1324	#if defined(SH_WITH_CLIENT) \|\| defined(SH_STANDALONE)
1325
1326	static unsigned char sh_obscure_index[256];
1327
1328	int sh_util_obscure_ok (char * str)
1329	{
1330	unsigned long i;
1331	char * endptr = str;
1332
1333	SL_ENTER(_("sh_util_obscure_ex"));
1334
1335	if (0 == sl_strncmp("all", str, 3))
1336	{
1337	for (i = 0; i < 255; ++i)
1338	{
1339	sh_obscure_index[i] = (unsigned char)1;
1340	}
1341	SL_RETURN(0, _("sh_util_obscure_ex"));
1342	}
1343
1344	for (i = 0; i < 255; ++i)
1345	{
1346	sh_obscure_index[i] = (unsigned char)0;
1347	}
1348
1349	while (*endptr != '\0')
1350	{
1351	i = strtoul (endptr, &endptr, 0);
1352	if (i > 255)
1353	{
1354	SL_RETURN(-1, _("sh_util_obscure_ex"));
1355	}
1356	sh_obscure_index[i] = (unsigned char)1;
1357	if (*endptr == ',')
1358	++endptr;
1359	}
1360	SL_RETURN(0, _("sh_util_obscure_ex"));
1361	}
1362
1363	int sh_util_obscurename (ShErrLevel level, char * name_orig, int flag)
1364	{
1365	char * name = name_orig;
1366	char * safe;
1367	unsigned int i;
1368
1369	SL_ENTER(_("sh_util_obscurename"));
1370
1371	ASSERT_RET((name != NULL), _("name != NULL"), (0))
1372
1373	/* -- Check name. --
1374	*/
1375	while (*name != '\0')
1376	{
1377	if ( (name) == '"' \|\| (name) == '\t' \|\|
1378	(name) == '\b' \|\| (name) == '\f' \|\|
1379	(name) == '\n' \|\| (name) == '\r' \|\|
1380	(name) == '\v' \|\| iscntrl((int) name) \|\|
1381	((name) != ' ' && !isgraph ((int) name)) )
1382	{
1383	i = (unsigned char) *name;
1384	if (sh_obscure_index[i] != (unsigned char)1)
1385	{
1386	if (flag == S_TRUE)
1387	{
1388	safe = sh_util_safe_name (name_orig);
1389	sh_error_handle (level, FIL__, __LINE__, 0, MSG_FI_OBSC,
1390	safe);
1391	SH_FREE(safe);
1392	}
1393	SL_RETURN((-1),_("sh_util_obscurename"));
1394	}
1395	}
1396	name++;
1397	}
1398
1399	SL_RETURN((0),_("sh_util_obscurename"));
1400	}
1401	#endif
1402
1403	/* returns freshly allocated memory, return value should be free'd
1404	*/
1405	char * sh_util_basename(char * fullpath)
1406	{
1407	char * retval;
1408	size_t i;
1409
1410	SL_ENTER(_("sh_util_basename"));
1411
1412	ASSERT_RET ((fullpath != NULL), _("fullpath != NULL"), (NULL))
1413
1414	i = sl_strlen (fullpath); /* fullpath[i] is terminating '\0' */
1415
1416	while (i > 0) {
1417	--i;
1418	if (fullpath[i] == '/') break;
1419	}
1420
1421	/* -- Not a valid path. --
1422	*/
1423	if ((fullpath[i] != '/') && (i == 0) )
1424	SL_RETURN(NULL, _("sh_util_basename"));
1425
1426	retval = SH_ALLOC(i + 1);
1427
1428	(void) sl_strlcpy (retval, fullpath, i+1);
1429
1430	SL_RETURN(retval, _("sh_util_basename"));
1431	}
1432
1433	/* returns freshly allocated memory, return value should be free'd
1434	*/
1435	char * sh_util_filename(char * fullpath)
1436	{
1437	char * retval;
1438	char * c;
1439	size_t i;
1440
1441	SL_ENTER(_("sh_util_filename"));
1442
1443	ASSERT_RET ((fullpath != NULL), _("fullpath != NULL"), (NULL))
1444
1445	c = strrchr(fullpath, '/');
1446	i = sl_strlen (c);
1447	if (i <= 1) SL_RETURN(NULL, _("sh_util_filename")); /* ends in '/' */
1448	++c;
1449	--i;
1450
1451	retval = SH_ALLOC(i + 1);
1452
1453	(void) sl_strlcpy (retval, c, i+1);
1454
1455	SL_RETURN(retval, _("sh_util_filename"));
1456	}
1457
1458
1459	/* returns freshly allocated memory, return value should be free'd
1460	*/
1461	char * sh_util_safe_name (const char * name)
1462	{
1463	register int i = 0;
1464	const char * p;
1465	char * retval;
1466	char oct[32];
1467	char format[16];
1468
1469	SL_ENTER(_("sh_util_safe_name"));
1470
1471	if (name == NULL)
1472	{
1473	/* return an allocated array
1474	*/
1475	retval = SH_ALLOC(7);
1476	(void) sl_strlcpy(retval, _("(null)"), 7);
1477	SL_RETURN(retval, _("sh_util_safe_name"));
1478	}
1479
1480	/*
1481	ASSERT_RET ((name != NULL), _("name != NULL"), _("NULL"))
1482	*/
1483
1484	#ifdef SH_USE_XML
1485	retval = SH_ALLOC(6 * sl_strlen(name) + 2);
1486	#else
1487	retval = SH_ALLOC(4 * sl_strlen(name) + 2);
1488	#endif
1489
1490	(void) sl_strncpy(format, _("%c%03o"), 16);
1491
1492	p = name;
1493
1494	while (*p != '\0') {
1495	/* Most frequent cases first
1496	*/
1497	if ( ((p) >= 'a' && (p) <= 'z') \|\| ((p) == '/') \|\| ((p) == '.') \|\|
1498	((p) >= '0' && (p) <= '9') \|\|
1499	((p) >= 'A' && (p) <= 'Z')) {
1500	retval[i] = *p;
1501	} else if ( (p) == '\\') { / backslash */
1502	retval[i] = '\\'; ++i;
1503	retval[i] = '\\';
1504	} else if ( (p) == '\n') { / newline */
1505	retval[i] = '\\'; ++i;
1506	retval[i] = 'n';
1507	} else if ( (p) == '\b') { / backspace */
1508	retval[i] = '\\'; ++i;
1509	retval[i] = 'b';
1510	} else if ( (p) == '\r') { / carriage return */
1511	retval[i] = '\\'; ++i;
1512	retval[i] = 'r';
1513	} else if ( (p) == '\t') { / horizontal tab */
1514	retval[i] = '\\'; ++i;
1515	retval[i] = 't';
1516	} else if ( (p) == '\v') { / vertical tab */
1517	retval[i] = '\\'; ++i;
1518	retval[i] = 'v';
1519	} else if ( (p) == '\f') { / form-feed */
1520	retval[i] = '\\'; ++i;
1521	retval[i] = 'f';
1522	#ifdef WITH_DATABASE
1523	} else if ( (p) == '\'') { / single quote */
1524	retval[i] = '\\'; ++i;
1525	retval[i] = '\'';
1526	#endif
1527	} else if ( (p) == ' ') { / space */
1528	retval[i] = '\\'; ++i;
1529	retval[i] = ' ';
1530	#ifdef SH_USE_XML
1531	} else if ( (p) == '"') { / double quote */
1532	retval[i] = '&'; ++i;
1533	retval[i] = 'q'; ++i;
1534	retval[i] = 'u'; ++i;
1535	retval[i] = 'o'; ++i;
1536	retval[i] = 't'; ++i;
1537	retval[i] = ';';
1538	} else if ( (p) == '&') { / ampersand */
1539	retval[i] = '&'; ++i;
1540	retval[i] = 'a'; ++i;
1541	retval[i] = 'm'; ++i;
1542	retval[i] = 'p'; ++i;
1543	retval[i] = ';';
1544	} else if ( (p) == '<') { / left angle */
1545	retval[i] = '&'; ++i;
1546	retval[i] = 'l'; ++i;
1547	retval[i] = 't'; ++i;
1548	retval[i] = ';';
1549	} else if ( (p) == '>') { / right angle */
1550	retval[i] = '&'; ++i;
1551	retval[i] = 'g'; ++i;
1552	retval[i] = 't'; ++i;
1553	retval[i] = ';';
1554	#else
1555	} else if ( (p) == '"') { / double quote */
1556	retval[i] = '\\'; ++i;
1557	retval[i] = '\"';
1558	#endif
1559	} else if (!isgraph ((int) p)) { / not printable */
1560	/@-bufferoverflowhigh -formatconst@/
1561	sprintf(oct, format, '\\', /* known to fit */
1562	(unsigned char) *p);
1563	/@+bufferoverflowhigh +formatconst@/
1564	retval[i] = oct[0]; ++i;
1565	retval[i] = oct[1]; ++i;
1566	retval[i] = oct[2]; ++i;
1567	retval[i] = oct[3];
1568	} else {
1569	retval[i] = *p;
1570	}
1571	++p;
1572	++i;
1573	}
1574	retval[i] = '\0';
1575	SL_RETURN(retval, _("sh_util_safe_name"));
1576	}
1577
1578	int sh_util_isnum (char *str)
1579	{
1580	char *p = str;
1581
1582	SL_ENTER(_("sh_util_isnum"));
1583
1584	ASSERT_RET ((str != NULL), _("str != NULL"), (-1))
1585
1586	while (p) {
1587	if (!isdigit((int) *p) )
1588	SL_RETURN((-1), _("sh_util_isnum"));
1589	++p;
1590	}
1591	SL_RETURN((0), _("sh_util_isnum"));
1592	}
1593
1594	char * sh_util_strconcat (const char * arg1, ...)
1595	{
1596	size_t length;
1597	char * s;
1598	char * strnew;
1599	va_list vl;
1600
1601	SL_ENTER(_("sh_util_strconcat"));
1602
1603	ASSERT_RET ((arg1 != NULL), _("arg1 != NULL"), (NULL))
1604
1605	length = sl_strlen (arg1) + 1;
1606
1607	va_start (vl, arg1);
1608	s = va_arg (vl, char * );
1609	while (s != NULL)
1610	{
1611	length = length + sl_strlen (s);
1612	s = va_arg (vl, char * );
1613	}
1614	va_end (vl);
1615
1616	strnew = SH_ALLOC( length + 2 );
1617	strnew[0] = '\0';
1618
1619	(void) sl_strlcpy (strnew, arg1, length + 2);
1620
1621	va_start (vl, arg1);
1622	s = va_arg (vl, char * );
1623	while (s)
1624	{
1625	(void) sl_strlcat (strnew, s, length + 2);
1626	s = va_arg (vl, char * );
1627	}
1628	va_end (vl);
1629
1630	SL_RETURN(strnew, _("sh_util_strconcat"));
1631	}
1632
1633
1634	#ifdef HAVE_REGEX_H
1635
1636	#include <regex.h>
1637
1638	int sh_util_regcmp (char * regex_str, char * in_str)
1639	{
1640	#if defined(REG_ESPACE)
1641	int status = REG_ESPACE;
1642	#else
1643	int status = -1;
1644	#endif
1645	regex_t preg;
1646	char * errbuf;
1647
1648	SL_ENTER(_("sh_util_regcmp"));
1649
1650	status = regcomp(&preg, regex_str, REG_NOSUB\|REG_EXTENDED);
1651
1652	if (status == 0)
1653	{
1654	if ((status = regexec(&preg, in_str, 0, NULL, 0)) == 0)
1655	{
1656	regfree (&preg);
1657	SL_RETURN((0), _("sh_util_regcmp"));
1658	}
1659	}
1660
1661	if (status != 0 && status != REG_NOMATCH)
1662	{
1663	errbuf = SH_ALLOC(BUFSIZ+2);
1664	(void) regerror(status, &preg, errbuf, BUFSIZ);
1665	errbuf[BUFSIZ] = '\0';
1666	sh_error_handle ((-1), FIL__, __LINE__, status, MSG_E_REGEX,
1667	errbuf, regex_str);
1668	SH_FREE(errbuf);
1669	}
1670
1671	regfree (&preg);
1672	SL_RETURN((-1), _("sh_util_regcmp"));
1673	}
1674
1675	#endif
1676
1677
1678
1679
1680
1681
1682
1683

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