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source: trunk/src/sh_utils.c@ 127

Last change on this file since 127 was 93, checked in by rainer, 18 years ago
Add check for PCI ROMs; fix ticket #51 (symlinks in root directory reported with leading double slash).
File size: 47.3 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_acl_compact(char * buf, ssize_t len)
201	{
202	unsigned char * p = (unsigned char *) buf;
203	int state = 0;
204	ssize_t rem = 0;
205	char * out;
206
207	SH_VALIDATE_NE(buf, NULL);
208	SH_VALIDATE_GE(len, 0);
209
210	out = SH_ALLOC(len + 1);
211
212	while (*p != '\0') {
213
214	/* -- not at start or after newline
215	*/
216	if (state == 1) {
217	if (p == '\n' \|\| p == ' ' \|\| p == '\t' \|\| p == '#') {
218	while (*p != '\n') {
219	++p;
220	if (*p == '\0') {
221	goto exit_it;
222	}
223	}
224	out[rem] = ','; ++rem;
225	while (p[1] == '\n') ++p; /* scan over consecutive newlines */
226	state = 0;
227	if (p[1] == '\0') {
228	if (rem > 0) out[rem-1] = '\0';
229	break;
230	}
231	}
232	else {
233	if (p <= 0x7F && isgraph((int) p)) {
234	out[rem] = (char) *p; ++rem;
235	}
236	}
237	}
238
239	/* -- at start or after newline
240	*/
241	else /* if (state == 0) */ {
242	if (0 == strncmp((char *) p, "user", 4)) {
243	out[rem] = 'u'; ++rem;
244	p += 3; state = 1;
245	} else if (0 == strncmp((char *) p, "group", 5)) {
246	out[rem] = 'g'; ++rem;
247	p += 4; state = 1;
248	} else if (0 == strncmp((char *) p, "mask", 4)) {
249	out[rem] = 'm'; ++rem;
250	p += 3; state = 1;
251	} else if (0 == strncmp((char *) p, "other", 5)) {
252	out[rem] = 'o';
253	p += 4; state = 1; ++rem;
254	} else if (*p == '\0') {
255	if (rem > 0) { out[rem-1] = '\0'; }
256	break;
257	} else {
258	if (p <= 0x7F && isprint((int) p)) {
259	out[rem] = (char) *p; ++rem;
260	}
261	}
262	state = 1;
263	}
264	++p;
265	}
266	exit_it:
267	out[rem] = '\0';
268	return out;
269	}
270
271
272	char * sh_util_strdup_l (const char * str, size_t len)
273	{
274	char * p = NULL;
275
276	SL_ENTER(_("sh_util_strdup_l"));
277
278	SH_VALIDATE_NE(str, NULL);
279	SH_VALIDATE_NE(len, 0);
280
281	if (sl_ok_adds (len, 1))
282	{
283	p = SH_ALLOC (len + 1);
284	(void) sl_strlcpy (p, str, len+1);
285	}
286	else
287	{
288	safe_fatal(_("integer overflow in sh_util_strdup_l"), FIL__, __LINE__);
289	}
290	SL_RETURN( p, _("sh_util_strdup_l"));
291	}
292
293	char * sh_util_strdup (const char * str)
294	{
295	char * p = NULL;
296	size_t len;
297
298	SL_ENTER(_("sh_util_strdup"));
299
300	SH_VALIDATE_NE(str, NULL);
301
302	len = sl_strlen(str);
303	p = SH_ALLOC (len + 1);
304	(void) sl_strlcpy (p, str, len+1);
305
306	SL_RETURN( p, _("sh_util_strdup"));
307	}
308
309	/* by the eircom.net computer incident
310	* response team
311	*/
312	char * sh_util_strsep (char *str, const char delim)
313	{
314	char ret, c, *d;
315
316	SL_ENTER(_("sh_util_strsep"));
317	ret = *str;
318
319	SH_VALIDATE_NE(ret, NULL);
320
321	for (c = str; c != '\0'; c++) {
322	for (d = (char ) delim; d != '\0'; d++) {
323	if (c == d) {
324	*c = '\0';
325	*str = c + 1;
326	SL_RETURN(ret, _("sh_util_strsep"));
327	}
328	}
329	}
330
331	/* If we get to here, there's no delimiters in the string */
332	*str = NULL;
333	SL_RETURN(ret, _("sh_util_strsep"));
334	}
335
336
337	/* returned string must be free'd by caller.
338	*/
339	char * sh_util_formatted (const char * formatt, st_format * ftab)
340	{
341	struct tm * time_ptr;
342	size_t size;
343	size_t isiz;
344	char * fmt = NULL;
345	char * p;
346	char * q;
347	char * outstr;
348	int i;
349	int j;
350	time_t inpp;
351
352	char * clist[16] = { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
353	NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL };
354	int nn = 0;
355
356	SL_ENTER(_("sh_util_formatted"));
357
358	if (formatt == NULL \|\| ftab == NULL \|\| *formatt == '\0')
359	SL_RETURN(NULL, _("sh_util_formatted"));
360
361	/* -- save the format (we overwrite it !!) --
362	*/
363	size = sl_strlen(formatt);
364
365	if (!sl_ok_adds(size, 1))
366	SL_RETURN(NULL, _("sh_util_formatted"));
367
368	++size;
369	fmt = SH_ALLOC(size);
370	(void) sl_strlcpy(fmt, formatt, size);
371
372	p = fmt;
373
374	j = 0;
375	while (ftab[j].fchar != '\0') {
376	if (ftab[j].type != S_FMT_STRING)
377	ftab[j].data_str = NULL;
378	++j;
379	}
380
381	while (p != NULL && *p != '\0' && NULL != (q = strchr(p, '%')))
382	{
383	++q;
384
385	/* fprintf(stderr, "p == %s q == %s\n", p, q); */
386
387	/* -- end of string is a '%' --
388	*/
389	if (*q == '\0')
390	{
391	--q;
392	*q = '\0';
393	break;
394	}
395
396	i = 0;
397	j = 0;
398
399	/* -- search the format char in input table --
400	* put (nn < 16) here -> all remaining %foo will be
401	* converted to %%
402	*/
403	while (ftab[j].fchar != '\0' && nn < 16)
404	{
405	if (ftab[j].fchar == *q)
406	{
407	/* -- Convert it to a string format (%s). --
408	*/
409	*q = 's'
410	;
411	i = 1;
412
413	switch(ftab[j].type) {
414
415	case S_FMT_STRING:
416	{
417	isiz = sl_strlen(ftab[j].data_str);
418	if (isiz > 0 && sl_ok_adds(size, isiz))
419	{
420	size += isiz;
421	clist[nn] = ftab[j].data_str;
422	++nn;
423	}
424	else
425	*q = '%';
426	goto endsrch;
427	}
428	break;
429
430	case S_FMT_ULONG:
431	{
432	ftab[j].data_str = (char *) SH_ALLOC(64);
433	/@-bufferoverflowhigh@/
434	sprintf (ftab[j].data_str, "%lu", /* known to fit */
435	ftab[j].data_ulong);
436	/@+bufferoverflowhigh@/
437	isiz = sl_strlen(ftab[j].data_str);
438	if (isiz > 0 && sl_ok_adds(size, isiz))
439	{
440	size += isiz;
441	clist[nn] = ftab[j].data_str;
442	++nn;
443	}
444	else
445	*q = '%';
446	goto endsrch;
447	}
448	break;
449
450	case S_FMT_LONG:
451	{
452	ftab[j].data_str = (char *) SH_ALLOC(64);
453	/@-bufferoverflowhigh@/
454	sprintf (ftab[j].data_str, "%ld", /* known to fit */
455	ftab[j].data_long);
456	/@+bufferoverflowhigh@/
457	isiz = sl_strlen(ftab[j].data_str);
458	if (isiz > 0 && sl_ok_adds(size, isiz))
459	{
460	size += isiz;
461	clist[nn] = ftab[j].data_str;
462	++nn;
463	}
464	else
465	*q = '%';
466	goto endsrch;
467	}
468	break;
469
470	case S_FMT_TIME:
471	{
472	ftab[j].data_str = (char *) SH_ALLOC(64);
473	inpp = (time_t)ftab[j].data_ulong;
474	if (inpp != 0)
475	{
476	time_ptr = localtime (&(inpp));
477	if (time_ptr != NULL)
478	(void) strftime(ftab[j].data_str, 64,
479	_("%d-%m-%Y %H:%M:%S"), time_ptr);
480	else
481	(void) sl_strlcpy(ftab[j].data_str,
482	_("00-00-0000 00:00:00"), 64);
483	}
484	else
485	{
486	(void) sl_strlcpy(ftab[j].data_str,
487	_("(None)"), 64);
488	}
489	isiz = sl_strlen(ftab[j].data_str);
490	if (isiz > 0 && sl_ok_adds(size, isiz))
491	{
492	size += isiz;
493	clist[nn] = ftab[j].data_str;
494	++nn;
495	}
496	else
497	*q = '%';
498	goto endsrch;
499	}
500	break;
501
502	default:
503	/* do nothing */;
504	}
505
506	}
507	++j;
508	}
509
510	endsrch:
511
512	p = q;
513
514	/* -- not found -- */
515	if (i == 0)
516	{
517	*q = '%';
518	++p;
519	}
520
521	}
522
523	/* -- Format string evaluated.
524	clist[] List of strings
525	size Total size of format string + clist[] strings
526	-- */
527
528	/* -- closing '\0' --
529	*/
530	if (sl_ok_adds(size, 1))
531	size++;
532	outstr = (char *) SH_ALLOC(size);
533
534	/* -- print it --
535	*/
536	(void) sl_snprintf( outstr, size, fmt,
537	clist[0], clist[1], clist[2], clist[3],
538	clist[4], clist[5], clist[6], clist[7],
539	clist[8], clist[9], clist[10], clist[11],
540	clist[12], clist[13], clist[14], clist[15]);
541	outstr[size-1] = '\0';
542
543	/* -- cleanup --
544	*/
545	j = 0;
546	while (ftab[j].fchar != '\0') {
547	if (ftab[j].type != S_FMT_STRING && ftab[j].data_str != NULL)
548	SH_FREE(ftab[j].data_str);
549	++j;
550	}
551	SH_FREE(fmt);
552
553	SL_RETURN(outstr, _("sh_util_formatted"));
554	}
555
556	/* read a hexchar, return int value (0-15)
557	* can't inline (AIX)
558	*/
559	int sh_util_hexchar( const char c )
560	{
561	/@+charint@/
562	if ( c >= '0' && c <= '9' )
563	return c - '0';
564	else if ( c >= 'a' && c <= 'f' )
565	return c - 'a' + 10;
566	else if ( c >= 'A' && c <= 'F' )
567	return c - 'A' + 10;
568	else return -1;
569	/@-charint@/
570	}
571
572	char * sh_util_charhex( unsigned char i )
573	{
574	static char i2h[2];
575	int j, k;
576
577	j = i / 16;
578	k = i - (j*16);
579
580	if (j < 10) i2h[0] = '0'+j;
581	else i2h[0] = 'A'+(j-10);
582
583	if (k < 10) i2h[1] = '0'+k;
584	else i2h[1] = 'A'+(k-10);
585
586	return i2h;
587	}
588
589	/* read a hexadecimal key, convert to binary
590	*/
591	int sh_util_hextobinary (char * binary, const char * hex, int bytes)
592	{
593	int i = 0, j, k, l = 0;
594	char c;
595
596	#define SH_HEXCHAR(x, y) \
597	c = (x); \
598	if ( c >= '0' && c <= '9' ) \
599	y = c - '0'; \
600	else if ( c >= 'a' && c <= 'f' ) \
601	y = c - 'a' + 10; \
602	else if ( c >= 'A' && c <= 'F' ) \
603	y = c - 'A' + 10; \
604	else \
605	SL_RETURN((-1), _("sh_util_hextobinary"))
606
607
608	SL_ENTER(_("sh_util_hextobinary"));
609
610	if (bytes < 2)
611	SL_RETURN((-1), _("sh_util_hextobinary"));
612
613	while (i < (bytes-1))
614	{
615	SH_HEXCHAR(hex[i], k);
616	SH_HEXCHAR(hex[i+1], j);
617
618	binary[l] = (char)(k * 16 + j);
619	++l; i+= 2;
620	}
621
622	SL_RETURN((0), _("sh_util_hextobinary"));
623	}
624
625	static void copy_four (unsigned char * dest, UINT32 in)
626	{
627	UINT32 i, j;
628	int count;
629
630	SL_ENTER(_("copy_four"));
631	for (count = 0; count < 4; ++count)
632	{
633	i = in / 256;
634	j = in - (i*256);
635	dest[count] = (unsigned char) j;
636	in = i;
637	}
638	SL_RET0(_("copy_four"));
639	}
640
641	/* compute HMAC-TIGER
642	*/
643	static char * sh_util_hmac_tiger (char * hexkey,
644	char * text, size_t textlen)
645	{
646	static char opad[KEY_BLOCK] = {
647	(char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C,
648	(char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C,
649	(char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C,
650	(char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C
651	};
652	static char ipad[KEY_BLOCK] = {
653	(char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36,
654	(char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36,
655	(char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36,
656	(char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36
657	};
658	static char zap[KEY_BLOCK] = {
659	(char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00,
660	(char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00,
661	(char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00,
662	(char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00
663	};
664	char K[KEY_BLOCK];
665	char outer[KEY_BLOCK];
666	char * inner;
667	UINT32 * h1;
668	UINT32 * h2;
669	UINT32 cc[KEY_LEN/4];
670	char * res;
671
672	size_t i;
673
674	SL_ENTER(_("sh_util_hmac_tiger"));
675	ASSERT((KEY_BLOCK <= (KEY_LEN/2)), _("KEY_BLOCK <= (KEY_LEN/2)"))
676
677	if (KEY_BLOCK > (KEY_LEN/2))
678	{
679	res = sh_tiger_hash (NULL, TIGER_DATA, 0);
680	SL_RETURN(res, _("sh_util_hmac_tiger"));
681	}
682
683	memcpy (K, zap, KEY_BLOCK);
684
685	if (sh_util_hextobinary (K, hexkey, KEY_LEN) < 0)
686	{
687	res = sh_tiger_hash (NULL, TIGER_DATA, 0);
688	SL_RETURN(res, _("sh_util_hmac_tiger"));
689	}
690
691	if (sl_ok_adds(textlen, KEY_BLOCK))
692	{
693	inner = (char *) SH_ALLOC (textlen + KEY_BLOCK);
694
695	for (i = 0; i < KEY_BLOCK; ++i)
696	{
697	outer[i] = K[i] ^ opad[i];
698	inner[i] = K[i] ^ ipad[i];
699	}
700	for (i = KEY_BLOCK; i < (KEY_BLOCK+textlen); ++i)
701	{
702	inner[i] = text[i - KEY_BLOCK];
703	}
704	}
705	else
706	{
707	sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
708	_("integer overflow"),
709	_("sh_util_hmac_tiger"));
710	res = sh_tiger_hash (NULL, TIGER_DATA, 0);
711	SL_RETURN(res, _("sh_util_hmac_tiger"));
712	}
713
714	/* now compute the hash
715	*/
716	h1 = sh_tiger_hash_uint32 ( outer,
717	TIGER_DATA,
718	KEY_BLOCK);
719	for (i = 0; i < (KEY_LEN/8); ++i)
720	{
721	/* cc[i] = h1[i]; */
722	copy_four ( (unsigned char *) &(cc[i]), h1[i]);
723	}
724
725	h2 = sh_tiger_hash_uint32 ( inner,
726	TIGER_DATA,
727	(unsigned long) KEY_BLOCK+textlen);
728	for (i = KEY_LEN/8; i < (KEY_LEN/4); ++i)
729	{
730	copy_four ( (unsigned char *) &(cc[i]), h2[i - (KEY_LEN/8)]);
731	/* cc[i] = h2[i - (KEY_LEN/8)]; */
732	}
733	SH_FREE(inner);
734
735	res = sh_tiger_hash ((char *) &cc[0],
736	TIGER_DATA,
737	(unsigned long) (KEY_LEN/4 * sizeof(UINT32)));
738
739	SL_RETURN(res, _("sh_util_hmac_tiger"));
740	}
741
742	static char * sh_util_hash_tiger ( char * hexkey,
743	char * text, size_t textlen)
744	{
745	char * res;
746	char h2[2*KEY_LEN+1];
747	SL_ENTER(_("sh_util_hash_tiger"));
748
749	(void) sl_strlcpy(h2, hexkey, KEY_LEN+1);
750	(void) sl_strlcat(h2, sh_tiger_hash(text, TIGER_DATA,
751	(unsigned long) textlen), 2*KEY_LEN+1);
752
753	res = sh_tiger_hash(h2, TIGER_DATA, 2*KEY_LEN);
754
755	SL_RETURN(res, _("sh_util_hash_tiger"));
756	}
757
758	/* --- compute signature on data ---
759	*/
760	#define TYPE_HMAC 0
761	#define TYPE_HASH 1
762
763	static int sigtype = TYPE_HMAC;
764
765	int sh_util_sigtype (const char * c)
766	{
767	SL_ENTER(_("sh_util_sigtype"));
768	if (c == NULL)
769	SL_RETURN( -1, _("sh_util_sigtype"));
770
771	if (0 == strcmp(_("HMAC-TIGER"), c))
772	sigtype = TYPE_HMAC;
773	else if (0 == strcmp(_("HASH-TIGER"), c))
774	sigtype = TYPE_HASH;
775	else
776	SL_RETURN( -1, _("sh_util_sigtype"));
777
778	SL_RETURN( 0, _("sh_util_sigtype"));
779	}
780
781	char * sh_util_siggen (char * hexkey,
782	char * text, size_t textlen)
783	{
784	char * p;
785
786	SL_ENTER(_("sh_util_siggen"));
787	if (sigtype == TYPE_HMAC)
788	p = sh_util_hmac_tiger (hexkey,
789	text, textlen);
790	else
791	p = sh_util_hash_tiger (hexkey,
792	text, textlen);
793	SL_RETURN(p, _("sh_util_siggen"));
794	}
795
796
797	/* a simple compressor
798	*/
799	long sh_util_compress (char * dest, char * src, size_t dest_size)
800	{
801	char * add;
802	char * get;
803	size_t count = 0;
804	size_t dest_end;
805
806	SL_ENTER(_("sh_util_compress"));
807
808	if (dest_size == 0)
809	SL_RETURN((0), _("sh_util_compress"));
810
811	if ((dest == NULL) \|\| (src == NULL))
812	SL_RETURN((0), _("sh_util_compress"));
813
814	dest_end = sl_strlen(dest);
815
816	if (dest_end > dest_size)
817	SL_RETURN((0), _("sh_util_compress"));
818
819	add = &dest[dest_end];
820	get = src;
821
822	while (count < (dest_size-dest_end))
823	{
824	if (isalnum((int) *get))
825	{
826	add = get;
827	++add;
828	++count;
829	}
830	++get;
831	if (*get == '\0' && (count < (dest_size-dest_end)))
832	/* end of src reached */
833	{
834	add = get; /* copy the '\0' */
835	break; /* and stop copying */
836	}
837	}
838
839	dest[dest_size-1] = '\0'; /* paranoia */
840	SL_RETURN(((long)count), _("sh_util_compress")); /* no of chars copied */
841	}
842
843
844	/* copy the four least significant bytes
845	*/
846	void sh_util_cpylong (char * dest, const char * src, int len )
847	{
848	int i, j;
849	union
850	{
851	long l;
852	char c[sizeof(long)];
853	} u;
854
855	SL_ENTER(_("sh_util_cpylong"));
856
857	u.l = 1;
858
859	/* MSB is first
860	*/
861	if (sizeof(long)>4 &&/@+charint@/(u.c[sizeof(long)-1] == 1)/@-charint@/)
862	{
863	j = (int) (sizeof(long)-4);
864	for (i = 0; i < j; ++i) ++src;
865	}
866
867	i = 0;
868
869	while (i < 4)
870	{
871	dest = (src);
872	++dest; ++src;
873	if (i == (len-1)) break;
874	++i;
875	}
876	SL_RET0(_("sh_util_cpylong"));
877	}
878
879	/* This is a maximally equidistributed combined Tausworthe
880	* generator. The sequence is,
881	*
882	* x_n = (s1_n ^ s2_n ^ s3_n)
883	*
884	* s1_{n+1} = (((s1_n & 4294967294) <<12) ^ (((s1_n <<13) ^ s1_n) >>19))
885	* s2_{n+1} = (((s2_n & 4294967288) << 4) ^ (((s2_n << 2) ^ s2_n) >>25))
886	* s3_{n+1} = (((s3_n & 4294967280) <<17) ^ (((s3_n << 3) ^ s3_n) >>11))
887	*
888	* computed modulo 2^32. In the three formulas above '^' means
889	* exclusive-or (C-notation), not exponentiation. Note that the
890	* algorithm relies on the properties of 32-bit unsigned integers (it
891	* is formally defined on bit-vectors of length 32).
892	*
893	* Stolen from GSL (GNU scientific library) and modified somewhat.
894	* I am using UINT32, which is guaranteed to be 32 bits. Also made
895	* sure that the initialization vector is valid.
896	*/
897
898
899	/* interval [0, 4294967296]
900	*/
901	static UINT32 taus_get_long (void *vstate)
902	{
903	UINT32 * state = (UINT32 *) vstate;
904
905	if (skey->rngI == BAD)
906	(void)taus_seed();
907
908	#define TAUSWORTHE(s,a,b,c,d) ((s &c) <<d) ^ (((s <<a) ^s) >>b)
909	/@+ignorequals@/
910	state[0] = TAUSWORTHE (state[0], 13, 19, 4294967294UL, 12);
911	state[1] = TAUSWORTHE (state[1], 2, 25, 4294967288UL, 4);
912	state[2] = TAUSWORTHE (state[2], 3, 11, 4294967280UL, 17);
913	/@-ignorequals@/
914	return (state[0] ^ state[1] ^ state[2]);
915	}
916
917	/* Hide the internal state of the PRNG by using its output as
918	* input for a one-way hash function.
919	*/
920	UINT32 taus_svec[6];
921
922	UINT32 taus_get (void state1, void state2, void *state3)
923	{
924	UINT32 retval;
925	UINT32 * res;
926	static UINT32 res_vec[6];
927	static int res_num = 0;
928	register int i;
929
930	if (res_num > 0)
931	{
932	retval = res_vec[res_num];
933	res_num = (res_num == 5) ? 0 : (res_num + 1);
934	return retval;
935	}
936
937	taus_svec[0] = taus_get_long (state1);
938	taus_svec[1] = taus_get_long (state2);
939	taus_svec[2] = taus_get_long (state3);
940	taus_svec[3] = taus_get_long (state1);
941	taus_svec[4] = taus_get_long (state2);
942	taus_svec[5] = taus_get_long (state3);
943
944	res = sh_tiger_hash_uint32 ( (char *) &taus_svec[0],
945	TIGER_DATA,
946	(unsigned long)(6 * sizeof(UINT32)));
947
948	for (i = 1; i < 6; ++i)
949	{
950	res_vec[i] = res[i];
951	}
952	retval = taus_svec[0];
953	res_num = 1;
954
955	taus_svec[0] = 0; taus_svec[1] = 0; taus_svec[2] = 0;
956	taus_svec[3] = 0; taus_svec[4] = 0; taus_svec[5] = 0;
957
958	return retval;
959	}
960
961	/* interval [0,1)
962	*/
963	double taus_get_double (void *vstate)
964	{
965	return taus_get_long (vstate) / (4294967296.0 + 1.0) ;
966	}
967
968	#define LCG(n) ((69069 * n) & 0xffffffffUL)
969
970	/* TAKE CARE: state[0], state[1], state[2] must be > 2,8,16, respectively
971	*/
972	static void taus_set_from_ulong (void *vstate, unsigned long int s)
973	{
974	UINT32 state = (UINT32 ) vstate;
975
976	if (s == 0)
977	s = 1; /* default seed is 1 */
978
979	state[0] = (UINT32)(LCG (s) \| (UINT32) 0x03);
980	state[1] = (UINT32)(LCG (state[0]) \| (UINT32) 0x09);
981	state[2] = (UINT32)(LCG (state[1]) \| (UINT32) 0x17);
982
983	/* 'warm up'
984	*/
985	(void) taus_get_long (state);
986	(void) taus_get_long (state);
987	(void) taus_get_long (state);
988	(void) taus_get_long (state);
989	(void) taus_get_long (state);
990	(void) taus_get_long (state);
991
992	return;
993	}
994
995	static void taus_set_from_state (void vstate, void init_state)
996	{
997	UINT32 state = (UINT32 ) vstate;
998	UINT32 state0 = (UINT32 ) init_state;
999
1000	state[0] = state0[0] \| (UINT32) 0x03;
1001	state[1] = state0[1] \| (UINT32) 0x09;
1002	state[2] = state0[2] \| (UINT32) 0x17;
1003
1004	return;
1005	}
1006
1007
1008	int taus_seed ()
1009	{
1010	char bufx[9 * sizeof(UINT32) + 1];
1011	int status;
1012	static unsigned long seed_time = 0;
1013
1014	SL_ENTER(_("taus_seed"));
1015
1016	if (skey->rngI == GOOD)
1017	{
1018	if ( (sh_unix_longtime () - seed_time) < 3600)
1019	SL_RETURN( (0), _("taus_seed"));
1020	}
1021
1022	seed_time = sh_unix_longtime ();
1023
1024	status = sh_entropy (24, bufx);
1025
1026	if (!SL_ISERROR(status))
1027	{
1028	skey->rngI = GOOD;
1029	memcpy (&skey->rng0[0], &bufx[0], 2*sizeof(UINT32));
1030	memcpy (&skey->rng1[0], &bufx[2sizeof(UINT32)], 2sizeof(UINT32));
1031	memcpy (&skey->rng2[0], &bufx[4sizeof(UINT32)], 2sizeof(UINT32));
1032	memset (bufx, 0, 9 * sizeof(UINT32) + 1);
1033
1034	skey->rng0[2] = 0;
1035	skey->rng1[2] = 0;
1036	skey->rng2[2] = 0;
1037
1038	taus_set_from_state( &(skey->rng0[0]), &(skey->rng0[0]));
1039	taus_set_from_state( &(skey->rng1[0]), &(skey->rng1[0]));
1040	taus_set_from_state( &(skey->rng2[0]), &(skey->rng2[0]));
1041
1042	SL_RETURN( (0), _("taus_seed"));
1043	}
1044
1045	sh_error_handle ((-1), FIL__, __LINE__, status, MSG_ES_ENT,
1046	_("sh_entropy"));
1047
1048	/* emergency backup - unsafe !
1049	*/
1050	skey->rngI = GOOD;
1051	#ifdef HAVE_GETTIMEOFDAY
1052	taus_set_from_ulong ( &(skey->rng0[0]), LCG (sh_unix_notime()) );
1053	#else
1054	taus_set_from_ulong ( &(skey->rng0[0]), LCG (seed_time) );
1055	#endif
1056	taus_set_from_ulong ( &(skey->rng1[0]), LCG (skey->rng0[0]) );
1057	taus_set_from_ulong ( &(skey->rng2[0]), LCG (skey->rng1[0]) );
1058	skey->rngI = BAD;
1059
1060	SL_RETURN( (-1), _("taus_seed"));
1061	}
1062
1063	/@+charint@/
1064	static unsigned char new_key[] = { 0xA7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xA7 };
1065	/@-charint@/
1066	static void copy_four (unsigned char * dest, UINT32 in);
1067
1068	int sh_util_set_newkey (const char * new_in)
1069	{
1070	size_t i, j = 0;
1071	size_t len;
1072	SL_TICKET fp;
1073	SL_TICKET fout;
1074	char * key;
1075	char * path;
1076	char * outpath = NULL;
1077	unsigned char * image = NULL;
1078	long s = 0;
1079	long ilen = 0;
1080	long ii, k = 0;
1081	UINT32 * h1;
1082	char * new = NULL;
1083
1084	if (0 != sl_is_suid())
1085	{
1086	fprintf(stderr, _("ERROR: insufficient privilege\n"));
1087	_exit (EXIT_FAILURE);
1088	/@notreached@/
1089	return -1; /* braindead MAC OSX compiler needs this */
1090	}
1091
1092	if (new_in == NULL \|\| new_in[0] == '\0')
1093	{
1094	fprintf(stderr,
1095	_("ERROR: no key given\n Argument must be 'key@path'\n"));
1096	_exit (EXIT_FAILURE);
1097	/@notreached@/
1098	return -1;
1099	}
1100
1101	if (NULL == (new = malloc(strlen(new_in) + 1)))
1102	goto bail_mem;
1103	sl_strncpy(new, new_in, strlen(new_in) + 1);
1104
1105	key = new;
1106	len = strlen(new);
1107	for (i = 1; i < (len-2); ++i)
1108	{
1109	if (new[i] == '@' && new[i+1] == '/')
1110	{
1111	j = i+1; new[i] = '\0'; break;
1112	}
1113	}
1114	if (j == 0)
1115	{
1116	fprintf(stderr,
1117	_("ERROR: no path to executable given\n Argument must be 'key@path'\n"));
1118	free(new);
1119	_exit (EXIT_FAILURE);
1120	/@notreached@/
1121	return -1;
1122	}
1123	else
1124	path = &new[j];
1125
1126	len = strlen(path) + 1 + 4;
1127	/@-usedef@/
1128	if (NULL == (outpath = malloc(len)))
1129	goto bail_mem;
1130	/@-usedef@/
1131	sl_snprintf (outpath, len, _("%s.out"), path);
1132
1133	fp = sl_open_read(path, SL_NOPRIV);
1134	if (SL_ISERROR(fp))
1135	{
1136	fprintf(stderr,
1137	_("ERROR: cannot open %s for read (errnum = %ld)\n"), path, fp);
1138	free(new); free (outpath);
1139	_exit (EXIT_FAILURE);
1140	/@notreached@/
1141	return -1;
1142	}
1143
1144	fout = sl_open_write(outpath, SL_NOPRIV);
1145	if (SL_ISERROR(fout))
1146	{
1147	fprintf(stderr,
1148	_("ERROR: cannot open %s (errnum = %ld)\n"), outpath, fout);
1149	free(new); free (outpath);
1150	_exit (EXIT_FAILURE);
1151	/@notreached@/
1152	return -1;
1153	}
1154
1155
1156	image = malloc (4096);
1157	if (!image)
1158	goto bail_mem;
1159	while (0 < (ii = sl_read (fp, &image[s], 4096)))
1160	{
1161	ilen += ii;
1162	s += 4096;
1163	image = realloc (image, (size_t) (4096 + s));
1164	if (!image)
1165	goto bail_mem;
1166	}
1167
1168	printf(_("%ld bytes read\n"), ilen);
1169
1170
1171	for (k = 0; k < (ilen - 8); ++k)
1172	{
1173	if (image[k] == new_key[0] &&
1174	image[k+1] == new_key[1] &&
1175	image[k+2] == new_key[2] &&
1176	image[k+3] == new_key[3] &&
1177	image[k+4] == new_key[4] &&
1178	image[k+5] == new_key[5] &&
1179	image[k+6] == new_key[6] &&
1180	image[k+7] == new_key[7])
1181	{
1182	printf(_("old key found\n"));
1183	h1 = sh_tiger_hash_uint32 (key, TIGER_DATA,
1184	(unsigned long)strlen(key));
1185	copy_four( (unsigned char *) &(image[k]), h1[0]);
1186	copy_four( (unsigned char *) &(image[k+4]), h1[1]);
1187	(void) sl_write (fout, image, ilen);
1188	(void) sl_close (fout);
1189	printf(_("new file %s written\n"), outpath);
1190	free(new); free (outpath); free(image);
1191	_exit (EXIT_SUCCESS);
1192	/@notreached@/
1193	return 0;
1194	}
1195	}
1196
1197	fprintf(stderr,
1198	_("ERROR: old key not found\n"));
1199	free(new); free (outpath); free(image);
1200	_exit (EXIT_FAILURE);
1201	/@notreached@/
1202	return -1;
1203
1204
1205	bail_mem:
1206	fprintf(stderr,
1207	_("ERROR: out of memory\n"));
1208	if (new) free(new);
1209	if (outpath) free (outpath);
1210	if (image) free (image);
1211	_exit (EXIT_FAILURE);
1212	/@notreached@/
1213	return -1;
1214	}
1215
1216
1217
1218
1219	/* A simple en-/decoder, based on Vernam cipher. We use the
1220	* message as salt to hide the key by obtaining a different one-time
1221	* pad each time.
1222	* Should be safe against a listener on the network, but not against someone
1223	* with read access to the binary.
1224	*/
1225	void sh_util_encode (char * data, char * salt, int mode, char fill)
1226	{
1227	static char cc1[17] = N_("0123456789ABCDEF");
1228	char cc[17] = "\0";
1229	register int i, j, j1 = 0, j2 = 0, j3;
1230	char * dez;
1231
1232	SL_ENTER(_("sh_util_encode"));
1233
1234	/* init
1235	*/
1236	(void) sl_strlcpy( cc, _(cc1), sizeof(cc));
1237
1238	/* max 128 bits keyspace
1239	*/
1240	memset (skey->vernam, (int)fill, KEY_LEN+1);
1241
1242	dez = (char *) &(skey->ErrFlag[0]);
1243	sh_util_cpylong (skey->vernam, dez, 4);
1244	dez = (char *) &(skey->ErrFlag[1]);
1245	sh_util_cpylong (&skey->vernam[4], dez, 4);
1246
1247	skey->vernam[KEY_LEN] = '\0';
1248
1249	(void) sl_strlcpy(skey->vernam,
1250	sh_tiger_hash(skey->vernam, TIGER_DATA, KEY_LEN),
1251	KEY_LEN+1);
1252
1253	(void) sl_strlcpy(skey->vernam,
1254	sh_util_hmac_tiger (skey->vernam, salt, strlen(salt)),
1255	KEY_LEN+1);
1256
1257	(void) sl_strlcpy(skey->vernam,
1258	sh_util_hmac_tiger (skey->vernam, (char*) new_key, 8),
1259	KEY_LEN+1);
1260
1261	/* The following routine adds/subtracts data[j] and vernam[j] mod 16.
1262	*/
1263	j = 0;
1264	while (j < KEY_LEN)
1265	{
1266	for (i = 0; i < 16; ++i)
1267	{
1268	if (cc[i] == data[j]) j1 = i;
1269	if (cc[i] == skey->vernam[j]) j2 = i;
1270	}
1271	if (mode == 0)
1272	{
1273	j3 = j1 + j2;
1274	if (j3 > 15) j3 -= 16;
1275	data[j] = cc[j3];
1276	}
1277	else
1278	{
1279	j3 = j1 - j2;
1280	if (j3 < 0) j3 += 16;
1281	data[j] = cc[j3];
1282	}
1283	++j;
1284	}
1285	SL_RET0(_("sh_util_encode"));
1286	}
1287
1288	/* server mode
1289	*/
1290	int sh_util_setserver (const char * dummy)
1291	{
1292	SL_ENTER(_("sh_util_setserver"));
1293
1294	(void) dummy;
1295	sh.flag.isserver = GOOD;
1296	SL_RETURN((0),_("sh_util_setserver"));
1297	}
1298
1299
1300	int sh_util_setlooptime (const char * str)
1301	{
1302	int i = atoi (str);
1303
1304	SL_ENTER(_("sh_util_setlooptime"));
1305
1306	if (i >= 0 && i < INT_MAX) {
1307	sh.looptime = i;
1308	SL_RETURN((0),_("sh_util_setlooptime"));
1309	} else {
1310	sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
1311	_("loop time"), str);
1312	SL_RETURN((-1),_("sh_util_setlooptime"));
1313	}
1314	}
1315
1316	#if defined (SH_WITH_CLIENT) \|\| defined (SH_STANDALONE)
1317	int sh_util_setchecksum (const char * str)
1318	{
1319	static int reject = 0;
1320
1321	SL_ENTER(_("sh_util_setchecksum"));
1322
1323	if (reject == 1)
1324	SL_RETURN((0), _("sh_util_setchecksum"));
1325	reject = 1;
1326
1327	if (sl_strncmp (str, _("init"), sizeof("init")-1) == 0)
1328	{
1329	sh.flag.checkSum = SH_CHECK_INIT;
1330	}
1331	else if (sl_strncmp (str, _("update"), sizeof("update")-1) == 0)
1332	{
1333	if (S_TRUE == file_is_remote())
1334	{
1335	sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
1336	_("checksum testing"), str);
1337	SL_RETURN((-1), _("sh_util_setchecksum"));
1338	}
1339	else
1340	{
1341	sh.flag.checkSum = SH_CHECK_CHECK;
1342	sh.flag.update = S_TRUE;
1343	}
1344	}
1345	else if (sl_strncmp (str, _("check"), sizeof("check")-1) == 0)
1346	{
1347	sh.flag.checkSum = SH_CHECK_CHECK;
1348	}
1349	/*
1350	else if (sl_strncmp (str, _("update"), sizeof("update")-1) == 0)
1351	{
1352	sh.flag.checkSum = SH_CHECK_INIT;
1353	sh.flag.update = S_TRUE;
1354	}
1355	*/
1356	else if (sl_strncmp (str, _("none"), sizeof("none")-1) == 0)
1357	{
1358	sh.flag.checkSum = SH_CHECK_NONE;
1359	}
1360	else
1361	{
1362	sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
1363	_("checksum testing"), str);
1364	SL_RETURN((-1), _("sh_util_setchecksum"));
1365	}
1366	SL_RETURN((0), _("sh_util_setchecksum"));
1367	}
1368	#endif
1369
1370	/@+charint@/
1371	unsigned char TcpFlag[8][PW_LEN+1] = {
1372	#if (POS_TF == 1)
1373	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1374	#endif
1375	{ 0xFF,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xFF,0x00 },
1376	#if (POS_TF == 2)
1377	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1378	#endif
1379	{ 0xFF,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xFF,0x00 },
1380	#if (POS_TF == 3)
1381	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1382	#endif
1383	{ 0xFF,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xFF,0x00 },
1384	#if (POS_TF == 4)
1385	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1386	#endif
1387	{ 0xFF,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xFF,0x00 },
1388	#if (POS_TF == 5)
1389	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1390	#endif
1391	{ 0xFF,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xFF,0x00 },
1392	#if (POS_TF == 6)
1393	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1394	#endif
1395	{ 0xFF,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xFF,0x00 },
1396	#if (POS_TF == 7)
1397	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1398	#endif
1399	{ 0xFF,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xFF,0x00 },
1400	#if (POS_TF == 8)
1401	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1402	#endif
1403	};
1404	/@-charint@/
1405
1406	/* initialize a key to a random value
1407	* rev 0.8
1408	*/
1409	int sh_util_keyinit (char * buf, long size)
1410	{
1411	UINT32 bufy[6];
1412	int i;
1413	int status = 0;
1414	char * p;
1415
1416	SL_ENTER(_("sh_util_keyinit"));
1417
1418	ASSERT((size <= KEY_LEN+1), _("size <= KEY_LEN+1"))
1419
1420	if (size > KEY_LEN+1)
1421	size = KEY_LEN+1;
1422
1423	/* seed / re-seed the PRNG if required
1424	*/
1425	status = taus_seed ();
1426
1427	if (status == -1)
1428	sh_error_handle ((-1), FIL__, __LINE__, -1, MSG_ES_KEY1,
1429	_("taus_seed"));
1430
1431	for (i = 0; i < 6; ++i)
1432	bufy[i] = taus_get(&(skey->rng0[0]), &(skey->rng1[0]), &(skey->rng2[0]));
1433
1434	p = sh_tiger_hash ((char *) bufy, TIGER_DATA,
1435	(unsigned long)(6*sizeof(UINT32)));
1436	p[size-1] = '\0';
1437
1438	i = sl_strlcpy(buf, p, (size_t)size);
1439
1440	memset (bufy, 0, 6*sizeof(UINT32));
1441
1442	if ((status == 0) && (!SL_ISERROR(i)) )
1443	SL_RETURN((0),_("sh_util_keyinit"));
1444
1445	if (SL_ISERROR(i))
1446	sh_error_handle ((-1), FIL__, __LINE__, i, MSG_ES_KEY2,
1447	_("sl_strlcpy"));
1448
1449	SL_RETURN((-1),_("sh_util_keyinit"));
1450	}
1451
1452	#if defined(SH_WITH_CLIENT) \|\| defined(SH_STANDALONE)
1453
1454	static unsigned char sh_obscure_index[256];
1455	static int sh_obscure_no_check = S_FALSE;
1456
1457	int sh_util_valid_utf8 (const unsigned char * str)
1458	{
1459	const int sh_val_utf8_1 = 1;
1460	const int sh_val_utf8_2 = 2;
1461	const int sh_val_utf8_3 = 3;
1462	const int sh_val_utf8_4 = 4;
1463
1464	size_t len = strlen((char *)str);
1465	size_t l = 0;
1466	int typ = 0;
1467	unsigned char c = '\0';
1468	unsigned char c2[2] = { 0x00, 0x00 };
1469	unsigned char c3[3] = { 0x00, 0x00, 0x00 };
1470
1471
1472	#define SH_VAL_UTF8_1 ((c != '\0') && ((c & 0x80) == 0x00))
1473	#define SH_VAL_UTF8_2 ((c != '\0') && ((c & 0xE0) == 0xC0)) /* 110x xxxx */
1474	#define SH_VAL_UTF8_3 ((c != '\0') && ((c & 0xF0) == 0xE0)) /* 1110 xxxx */
1475	#define SH_VAL_UTF8_4 ((c != '\0') && ((c & 0xF8) == 0xF0)) /* 1111 0xxx */
1476	#define SH_VAL_UTF8_N ((c != '\0') && ((c & 0xC0) == 0x80)) /* 10xx xxxx */
1477	#define SH_VAL_BAD ((c == '"') \|\| (c == '\t') \|\| (c == '\b') \|\| \
1478	(c == '\f') \|\| (c == '\n') \|\| \
1479	(c == '\r') \|\| (c == '\v') \|\| iscntrl((int) c) \|\| \
1480	(c != ' ' && !isgraph ((int) c)))
1481
1482	while(l < len)
1483	{
1484	c = str[l];
1485
1486	if (SH_VAL_UTF8_1)
1487	{
1488	if (!(SH_VAL_BAD && (sh_obscure_index[c] != 1)))
1489	{
1490	typ = sh_val_utf8_1;
1491	++l; continue;
1492	}
1493	else
1494	{
1495	return S_FALSE;
1496	}
1497	}
1498	else if (SH_VAL_UTF8_2)
1499	{
1500	typ = sh_val_utf8_2;
1501	c2[0] = c;
1502	if ((c & 0x3e) != 0x00) /* !(overlong 2-byte seq.) */
1503	{
1504	++l;
1505	if (l != len) {
1506	c = str[l];
1507	if(SH_VAL_UTF8_N) {
1508	c2[1] = c;
1509	++l; continue;
1510	}
1511	else {
1512	return S_FALSE;
1513	}
1514	}
1515	else {
1516	return S_FALSE;
1517	}
1518	}
1519	else
1520	{
1521	return S_FALSE; /* overlong 2-byte seq. */
1522	}
1523	}
1524	else if (SH_VAL_UTF8_3)
1525	{
1526	typ = sh_val_utf8_3;
1527	c3[0] = c;
1528	++l; if (l == len) return S_FALSE; c = str[l];
1529	if(!SH_VAL_UTF8_N) return S_FALSE;
1530	if (((str[l-1] & 0x1F) == 0x00) && ((c & 0x60) == 0x00))
1531	return S_FALSE; /* overlong 3-byte seq. */
1532	c3[1] = c;
1533	++l; if (l == len) return S_FALSE; c = str[l];
1534	if(!SH_VAL_UTF8_N) return S_FALSE;
1535	c3[2] = c;
1536	++l; continue;
1537	}
1538	else if (SH_VAL_UTF8_4)
1539	{
1540	typ = sh_val_utf8_4;
1541	++l; if (l == len) return S_FALSE; c = str[l];
1542	if(!SH_VAL_UTF8_N) return S_FALSE;
1543	if (((str[l-1] & 0x0F) == 0x00) && ((c & 0x70) == 0x00))
1544	return S_FALSE; /* overlong 4-byte seq. */
1545	++l; if (l == len) return S_FALSE; c = str[l];
1546	if(!SH_VAL_UTF8_N) return S_FALSE;
1547	++l; if (l == len) return S_FALSE; c = str[l];
1548	if(!SH_VAL_UTF8_N) return S_FALSE;
1549	++l; continue;
1550	}
1551	return S_FALSE;
1552	}
1553
1554	/* last character is invisible (space or else)
1555	*/
1556	if (typ == sh_val_utf8_1)
1557	{
1558	if (c != ' ')
1559	return S_TRUE;
1560	else
1561	return S_FALSE;
1562	}
1563	else if (typ == sh_val_utf8_2)
1564	{
1565	if (c2[0] == 0xC2 && c2[1] == 0xA0) /* nbsp */
1566	return S_FALSE;
1567	else
1568	return S_TRUE;
1569	}
1570	else if (typ == sh_val_utf8_3)
1571	{
1572	if (c3[0] == 0xE2)
1573	{
1574	if (c3[1] == 0x80 && c3[2] >= 0x80 && c3[2] <= 0x8F)
1575	return S_FALSE; /* various spaces, left-to-right, right-to-left */
1576	else if (c3[1] == 0x80 && (c3[2] == 0xA8 \|\| c3[2] == 0xA9 \|\|
1577	c3[2] == 0xAD \|\| c3[2] == 0xAF))
1578	return S_FALSE; /* line sep, para sep, zw word joiner, nnbsp */
1579	else if (c3[1] == 0x81 && (c3[2] == 0xA0 \|\| c3[2] == 0xA1 \|\|
1580	c3[2] == 0x9F))
1581	return S_FALSE; /* word joiner, function app, math space */
1582	else
1583	return S_TRUE;
1584	}
1585	else if (c3[0] == 0xE3 && c3[1] == 0x80 && c3[2] == 0x80)
1586	{
1587	return S_FALSE; /* ideographic space */
1588	}
1589	else if (c3[0] == 0xEF && c3[1] == 0xBB && c3[2] == 0xBF)
1590	{
1591	return S_FALSE; /* zwnbsp */
1592	}
1593	else
1594	{
1595	return S_TRUE;
1596	}
1597	}
1598	else
1599	{
1600	return S_TRUE;
1601	}
1602	}
1603
1604
1605	int sh_util_obscure_ok (const char * str)
1606	{
1607	unsigned long i;
1608	char * endptr = NULL;
1609
1610	SL_ENTER(_("sh_util_obscure_ok"));
1611
1612	if (0 == sl_strncmp("all", str, 3))
1613	{
1614	for (i = 0; i < 255; ++i)
1615	{
1616	sh_obscure_index[i] = (unsigned char)1;
1617	}
1618	sh_obscure_no_check = S_TRUE;
1619	SL_RETURN(0, _("sh_util_obscure_ok"));
1620	}
1621
1622	sh_obscure_no_check = S_FALSE;
1623
1624	for (i = 0; i < 255; ++i)
1625	{
1626	sh_obscure_index[i] = (unsigned char)0;
1627	}
1628
1629	i = strtoul (str, &endptr, 0);
1630	if (i > 255)
1631	{
1632	SL_RETURN(-1, _("sh_util_obscure_ok"));
1633	}
1634	sh_obscure_index[i] = (unsigned char)1;
1635	if (*endptr == ',')
1636	++endptr;
1637
1638	while (*endptr != '\0')
1639	{
1640	i = strtoul (endptr, &endptr, 0);
1641	if (i > 255)
1642	{
1643	SL_RETURN(-1, _("sh_util_obscure_ok"));
1644	}
1645	sh_obscure_index[i] = (unsigned char)1;
1646	if (*endptr == ',')
1647	++endptr;
1648	}
1649	SL_RETURN(0, _("sh_util_obscure_ok"));
1650	}
1651
1652	static int sh_obscure_check_utf8 = S_FALSE;
1653
1654	int sh_util_obscure_utf8 (const char * c)
1655	{
1656	int i;
1657	SL_ENTER(_("sh_util_obscure_utf8"));
1658	i = sh_util_flagval(c, &(sh_obscure_check_utf8));
1659	if (sh_obscure_check_utf8 == S_TRUE)
1660	sh_obscure_no_check = S_FALSE;
1661	SL_RETURN(i, _("sh_util_obscure_utf8"));
1662	}
1663
1664
1665	int sh_util_obscurename (ShErrLevel level, char * name_orig, int flag)
1666	{
1667	unsigned char * name = (unsigned char *) name_orig;
1668	char * safe;
1669	unsigned int i;
1670	size_t len = 0;
1671
1672	SL_ENTER(_("sh_util_obscurename"));
1673
1674	ASSERT_RET((name != NULL), _("name != NULL"), (0))
1675
1676	if (sh_obscure_no_check == S_FALSE)
1677	{
1678	if (sh_obscure_check_utf8 != S_TRUE)
1679	{
1680	/* -- Check name. --
1681	*/
1682	while (*name != '\0')
1683	{
1684	if ( (name) > 0x7F \|\| (name) == '"' \|\| (*name) == '\t' \|\|
1685	(name) == '\b' \|\| (name) == '\f' \|\|
1686	(name) == '\n' \|\| (name) == '\r' \|\|
1687	(name) == '\v' \|\| iscntrl((int) name) \|\|
1688	((name) != ' ' && !isgraph ((int) name)) )
1689	{
1690	i = (unsigned char) *name;
1691	if (sh_obscure_index[i] != (unsigned char)1)
1692	{
1693	goto err;
1694	}
1695	}
1696	name++; ++len;
1697	}
1698
1699	/* Check for blank at end of name
1700	*/
1701	if ((len > 0) && (name_orig[len-1] == ' '))
1702	{
1703	goto err;
1704	}
1705	}
1706	else
1707	{
1708	if (S_FALSE == sh_util_valid_utf8(name))
1709	{
1710	goto err;
1711	}
1712	SL_RETURN((0),_("sh_util_obscurename"));
1713	}
1714	}
1715
1716	SL_RETURN((0),_("sh_util_obscurename"));
1717
1718	err:
1719
1720	if (flag == S_TRUE)
1721	{
1722	safe = sh_util_safe_name (name_orig);
1723	sh_error_handle (level, FIL__, __LINE__, 0, MSG_FI_OBSC,
1724	safe);
1725	SH_FREE(safe);
1726	}
1727	SL_RETURN((-1),_("sh_util_obscurename"));
1728	}
1729
1730	#endif
1731
1732	/* returns freshly allocated memory, return value should be free'd
1733	*/
1734	char * sh_util_dirname(const char * fullpath)
1735	{
1736	char * retval;
1737	size_t len;
1738	char * tmp;
1739
1740	SL_ENTER(_("sh_util_dirname"));
1741
1742	ASSERT_RET ((fullpath != NULL), _("fullpath != NULL"), (NULL))
1743	ASSERT_RET ((fullpath == '/'), _("fullpath == '/'"), (NULL))
1744
1745	retval = sh_util_strdup(fullpath);
1746
1747	tmp = retval;
1748	while (*tmp == '/') ++tmp;
1749
1750	/* (1) only leading slashes -- return exact copy
1751	*/
1752	if (*tmp == '\0')
1753	{
1754	SL_RETURN(retval, _("sh_util_dirname"));
1755	}
1756
1757	/* (2) there are non-slash characters, so delete trailing slashes
1758	*/
1759	len = sl_strlen (retval); /* retval[len] is terminating '\0' */
1760
1761	while (len > 1 && retval[len-1] == '/') /* delete trailing slash */
1762	{
1763	retval[len-1] = '\0';
1764	--len;
1765	}
1766
1767	/* (3) now delete all non-slash characters up to the preceding slash
1768	*/
1769	while (len > 1 && retval[len-1] != '/') {
1770	retval[len-1] = '\0';
1771	--len;
1772	}
1773
1774	/* (4a) only leading slashes left, so return this
1775	*/
1776	if (&(retval[len]) == tmp)
1777	{
1778	SL_RETURN(retval, _("sh_util_dirname"));
1779	}
1780
1781	/* (4b) strip trailing slash(es) of parent directory
1782	*/
1783	while (len > 1 && retval[len-1] == '/') {
1784	retval[len-1] = '\0';
1785	--len;
1786	}
1787	SL_RETURN(retval, _("sh_util_dirname"));
1788
1789	}
1790
1791	/* returns freshly allocated memory, return value should be free'd
1792	*/
1793	char * sh_util_basename(const char * fullpath)
1794	{
1795	char * retval = NULL;
1796	const char * tmp;
1797	char * tmp2;
1798	char * c;
1799	size_t len;
1800
1801	SL_ENTER(_("sh_util_basename"));
1802
1803	ASSERT_RET ((fullpath != NULL), _("fullpath != NULL"), (NULL))
1804
1805	tmp = fullpath; while (*tmp == '/') ++tmp;
1806	if (*tmp == '\0')
1807	{
1808	retval = sh_util_strdup(fullpath);
1809	}
1810	else
1811	{
1812	tmp2 = sh_util_strdup(tmp);
1813	len = sl_strlen (tmp2);
1814
1815	while (len > 1 && tmp2[len-1] == '/')
1816	{
1817	tmp2[len-1] = '\0';
1818	--len;
1819	}
1820
1821	c = strrchr(tmp2, '/');
1822	if (c)
1823	{
1824	retval = sh_util_strdup(++c);
1825	SH_FREE(tmp2);
1826	}
1827	else
1828	{
1829	retval = tmp2;
1830	}
1831	}
1832
1833	SL_RETURN(retval, _("sh_util_basename"));
1834	}
1835
1836
1837	/* returns freshly allocated memory, return value should be free'd
1838	*/
1839	char * sh_util_safe_name (const char * name)
1840	{
1841	register int i = 0;
1842	const char * p;
1843	char * retval;
1844	char oct[32];
1845	char format[16];
1846	size_t len;
1847
1848	SL_ENTER(_("sh_util_safe_name"));
1849
1850	if (name == NULL)
1851	{
1852	/* return an allocated array
1853	*/
1854	retval = SH_ALLOC(7);
1855	(void) sl_strlcpy(retval, _("(null)"), 7);
1856	SL_RETURN(retval, _("sh_util_safe_name"));
1857	}
1858
1859	/*
1860	ASSERT_RET ((name != NULL), _("name != NULL"), _("NULL"))
1861	*/
1862
1863	len = sl_strlen(name);
1864	p = name;
1865
1866	#ifdef SH_USE_XML
1867	if (sl_ok_muls (6, len) && sl_ok_adds ((6*len), 2))
1868	{ retval = SH_ALLOC(6 * len + 2); }
1869	else
1870	{
1871	/* return an allocated array
1872	*/
1873	retval = SH_ALLOC(11);
1874	(void) sl_strlcpy(retval, _("(overflow)"), 11);
1875	SL_RETURN(retval, _("sh_util_safe_name"));
1876	}
1877	#else
1878	if (sl_ok_muls (4, len) && sl_ok_adds ((4*len), 2))
1879	{ retval = SH_ALLOC(4 * len + 2); }
1880	else
1881	{
1882	/* return an allocated array
1883	*/
1884	retval = SH_ALLOC(11);
1885	(void) sl_strlcpy(retval, _("(overflow)"), 11);
1886	SL_RETURN(retval, _("sh_util_safe_name"));
1887	}
1888	#endif
1889
1890	(void) sl_strncpy(format, _("%c%03o"), 16);
1891
1892	while (*p != '\0') {
1893	/* Most frequent cases first
1894	*/
1895	if ( ((p) >= 'a' && (p) <= 'z') \|\| ((p) == '/') \|\| ((p) == '.') \|\|
1896	((p) >= '0' && (p) <= '9') \|\|
1897	((p) >= 'A' && (p) <= 'Z')) {
1898	retval[i] = *p;
1899	} else if ( (p) == '\\') { / backslash */
1900	retval[i] = '\\'; ++i;
1901	retval[i] = '\\';
1902	} else if ( (p) == '\n') { / newline */
1903	retval[i] = '\\'; ++i;
1904	retval[i] = 'n';
1905	} else if ( (p) == '\b') { / backspace */
1906	retval[i] = '\\'; ++i;
1907	retval[i] = 'b';
1908	} else if ( (p) == '\r') { / carriage return */
1909	retval[i] = '\\'; ++i;
1910	retval[i] = 'r';
1911	} else if ( (p) == '\t') { / horizontal tab */
1912	retval[i] = '\\'; ++i;
1913	retval[i] = 't';
1914	} else if ( (p) == '\v') { / vertical tab */
1915	retval[i] = '\\'; ++i;
1916	retval[i] = 'v';
1917	} else if ( (p) == '\f') { / form-feed */
1918	retval[i] = '\\'; ++i;
1919	retval[i] = 'f';
1920	#ifdef WITH_DATABASE
1921	} else if ( (p) == '\'') { / single quote */
1922	retval[i] = '\\'; ++i;
1923	retval[i] = '\'';
1924	#endif
1925	} else if ( (p) == ' ') { / space */
1926	retval[i] = '\\'; ++i;
1927	retval[i] = ' ';
1928	#ifdef SH_USE_XML
1929	} else if ( (p) == '"') { / double quote */
1930	retval[i] = '&'; ++i;
1931	retval[i] = 'q'; ++i;
1932	retval[i] = 'u'; ++i;
1933	retval[i] = 'o'; ++i;
1934	retval[i] = 't'; ++i;
1935	retval[i] = ';';
1936	} else if ( (p) == '&') { / ampersand */
1937	retval[i] = '&'; ++i;
1938	retval[i] = 'a'; ++i;
1939	retval[i] = 'm'; ++i;
1940	retval[i] = 'p'; ++i;
1941	retval[i] = ';';
1942	} else if ( (p) == '<') { / left angle */
1943	retval[i] = '&'; ++i;
1944	retval[i] = 'l'; ++i;
1945	retval[i] = 't'; ++i;
1946	retval[i] = ';';
1947	} else if ( (p) == '>') { / right angle */
1948	retval[i] = '&'; ++i;
1949	retval[i] = 'g'; ++i;
1950	retval[i] = 't'; ++i;
1951	retval[i] = ';';
1952	#else
1953	} else if ( (p) == '"') { / double quote */
1954	retval[i] = '\\'; ++i;
1955	retval[i] = '\"';
1956	#endif
1957	} else if (!isgraph ((int) p)) { / not printable */
1958	/@-bufferoverflowhigh -formatconst@/
1959	/* flawfinder: ignore */
1960	sprintf(oct, format, '\\', /* known to fit */
1961	(unsigned char) *p);
1962	/@+bufferoverflowhigh +formatconst@/
1963	retval[i] = oct[0]; ++i;
1964	retval[i] = oct[1]; ++i;
1965	retval[i] = oct[2]; ++i;
1966	retval[i] = oct[3];
1967	} else {
1968	retval[i] = *p;
1969	}
1970	++p;
1971	++i;
1972	}
1973	retval[i] = '\0';
1974	SL_RETURN(retval, _("sh_util_safe_name"));
1975	}
1976
1977	int sh_util_isnum (char *str)
1978	{
1979	char *p = str;
1980
1981	SL_ENTER(_("sh_util_isnum"));
1982
1983	ASSERT_RET ((str != NULL), _("str != NULL"), (-1))
1984
1985	while (p) {
1986	if (!isdigit((int) *p) )
1987	SL_RETURN((-1), _("sh_util_isnum"));
1988	++p;
1989	}
1990	SL_RETURN((0), _("sh_util_isnum"));
1991	}
1992
1993	char * sh_util_strconcat (const char * arg1, ...)
1994	{
1995	size_t length, l2;
1996	char * s;
1997	char * strnew;
1998	va_list vl;
1999
2000	SL_ENTER(_("sh_util_strconcat"));
2001
2002	ASSERT_RET ((arg1 != NULL), _("arg1 != NULL"), (NULL))
2003
2004	length = sl_strlen (arg1) + 1;
2005
2006	va_start (vl, arg1);
2007	s = va_arg (vl, char * );
2008	while (s != NULL)
2009	{
2010	l2 = sl_strlen (s);
2011	if (sl_ok_adds(length, l2))
2012	length += l2;
2013	else
2014	SL_RETURN(NULL, _("sh_util_strconcat"));
2015	s = va_arg (vl, char * );
2016	}
2017	va_end (vl);
2018
2019	if (sl_ok_adds(length, 2))
2020	strnew = SH_ALLOC( length + 2 );
2021	else
2022	SL_RETURN(NULL, _("sh_util_strconcat"));
2023
2024	strnew[0] = '\0';
2025
2026	(void) sl_strlcpy (strnew, arg1, length + 2);
2027
2028	va_start (vl, arg1);
2029	s = va_arg (vl, char * );
2030	while (s)
2031	{
2032	(void) sl_strlcat (strnew, s, length + 2);
2033	s = va_arg (vl, char * );
2034	}
2035	va_end (vl);
2036
2037	SL_RETURN(strnew, _("sh_util_strconcat"));
2038	}
2039
2040
2041	#ifdef HAVE_REGEX_H
2042
2043	#include <regex.h>
2044
2045	int sh_util_regcmp (char * regex_str, char * in_str)
2046	{
2047	#if defined(REG_ESPACE)
2048	int status = REG_ESPACE;
2049	#else
2050	int status = -1;
2051	#endif
2052	regex_t preg;
2053	char * errbuf;
2054
2055	SL_ENTER(_("sh_util_regcmp"));
2056
2057	status = regcomp(&preg, regex_str, REG_NOSUB\|REG_EXTENDED);
2058
2059	if (status == 0)
2060	{
2061	if ((status = regexec(&preg, in_str, 0, NULL, 0)) == 0)
2062	{
2063	regfree (&preg);
2064	SL_RETURN((0), _("sh_util_regcmp"));
2065	}
2066	}
2067
2068	if (status != 0 && status != REG_NOMATCH)
2069	{
2070	errbuf = SH_ALLOC(BUFSIZ);
2071	(void) regerror(status, &preg, errbuf, BUFSIZ);
2072	errbuf[BUFSIZ-1] = '\0';
2073	sh_error_handle ((-1), FIL__, __LINE__, status, MSG_E_REGEX,
2074	errbuf, regex_str);
2075	SH_FREE(errbuf);
2076	}
2077
2078	regfree (&preg);
2079	SL_RETURN((-1), _("sh_util_regcmp"));
2080	}
2081
2082	#endif
2083
2084
2085
2086
2087
2088
2089
2090

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