Context Navigation

source: trunk/src/sh_utils.c@ 88

Last change on this file since 88 was 76, checked in by rainer, 18 years ago
Fix for ticket #38 (csv escaping) and #39 (building on cygwin). Also optimize a bit.
File size: 46.5 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	/* can't inline (AIX)
557	*/
558	int sh_util_hexchar( const char c )
559	{
560	/@+charint@/
561	if ( c >= '0' && c <= '9' )
562	return c - '0';
563	else if ( c >= 'a' && c <= 'f' )
564	return c - 'a' + 10;
565	else if ( c >= 'A' && c <= 'F' )
566	return c - 'A' + 10;
567	else return -1;
568	/@-charint@/
569	}
570
571	/* read a hexadecimal key, convert to binary
572	*/
573	int sh_util_hextobinary (char * binary, const char * hex, int bytes)
574	{
575	int i = 0, j, k, l = 0;
576	char c;
577
578	#define SH_HEXCHAR(x, y) \
579	c = (x); \
580	if ( c >= '0' && c <= '9' ) \
581	y = c - '0'; \
582	else if ( c >= 'a' && c <= 'f' ) \
583	y = c - 'a' + 10; \
584	else if ( c >= 'A' && c <= 'F' ) \
585	y = c - 'A' + 10; \
586	else \
587	SL_RETURN((-1), _("sh_util_hextobinary"))
588
589
590	SL_ENTER(_("sh_util_hextobinary"));
591
592	if (bytes < 2)
593	SL_RETURN((-1), _("sh_util_hextobinary"));
594
595	while (i < (bytes-1))
596	{
597	SH_HEXCHAR(hex[i], k);
598	SH_HEXCHAR(hex[i+1], j);
599
600	binary[l] = (char)(k * 16 + j);
601	++l; i+= 2;
602	}
603
604	SL_RETURN((0), _("sh_util_hextobinary"));
605	}
606
607	static void copy_four (unsigned char * dest, UINT32 in)
608	{
609	UINT32 i, j;
610	int count;
611
612	SL_ENTER(_("copy_four"));
613	for (count = 0; count < 4; ++count)
614	{
615	i = in / 256;
616	j = in - (i*256);
617	dest[count] = (unsigned char) j;
618	in = i;
619	}
620	SL_RET0(_("copy_four"));
621	}
622
623	/* compute HMAC-TIGER
624	*/
625	static char * sh_util_hmac_tiger (char * hexkey,
626	char * text, size_t textlen)
627	{
628	static char opad[KEY_BLOCK] = {
629	(char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C,
630	(char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C,
631	(char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C,
632	(char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C, (char)0x5C
633	};
634	static char ipad[KEY_BLOCK] = {
635	(char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36,
636	(char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36,
637	(char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36,
638	(char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36, (char)0x36
639	};
640	static char zap[KEY_BLOCK] = {
641	(char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00,
642	(char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00,
643	(char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00,
644	(char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00, (char)0x00
645	};
646	char K[KEY_BLOCK];
647	char outer[KEY_BLOCK];
648	char * inner;
649	UINT32 * h1;
650	UINT32 * h2;
651	UINT32 cc[KEY_LEN/4];
652	char * res;
653
654	size_t i;
655
656	SL_ENTER(_("sh_util_hmac_tiger"));
657	ASSERT((KEY_BLOCK <= (KEY_LEN/2)), _("KEY_BLOCK <= (KEY_LEN/2)"))
658
659	if (KEY_BLOCK > (KEY_LEN/2))
660	{
661	res = sh_tiger_hash (NULL, TIGER_DATA, 0);
662	SL_RETURN(res, _("sh_util_hmac_tiger"));
663	}
664
665	memcpy (K, zap, KEY_BLOCK);
666
667	if (sh_util_hextobinary (K, hexkey, KEY_LEN) < 0)
668	{
669	res = sh_tiger_hash (NULL, TIGER_DATA, 0);
670	SL_RETURN(res, _("sh_util_hmac_tiger"));
671	}
672
673	if (sl_ok_adds(textlen, KEY_BLOCK))
674	{
675	inner = (char *) SH_ALLOC (textlen + KEY_BLOCK);
676
677	for (i = 0; i < KEY_BLOCK; ++i)
678	{
679	outer[i] = K[i] ^ opad[i];
680	inner[i] = K[i] ^ ipad[i];
681	}
682	for (i = KEY_BLOCK; i < (KEY_BLOCK+textlen); ++i)
683	{
684	inner[i] = text[i - KEY_BLOCK];
685	}
686	}
687	else
688	{
689	sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
690	_("integer overflow"),
691	_("sh_util_hmac_tiger"));
692	res = sh_tiger_hash (NULL, TIGER_DATA, 0);
693	SL_RETURN(res, _("sh_util_hmac_tiger"));
694	}
695
696	/* now compute the hash
697	*/
698	h1 = sh_tiger_hash_uint32 ( outer,
699	TIGER_DATA,
700	KEY_BLOCK);
701	for (i = 0; i < (KEY_LEN/8); ++i)
702	{
703	/* cc[i] = h1[i]; */
704	copy_four ( (unsigned char *) &(cc[i]), h1[i]);
705	}
706
707	h2 = sh_tiger_hash_uint32 ( inner,
708	TIGER_DATA,
709	(unsigned long) KEY_BLOCK+textlen);
710	for (i = KEY_LEN/8; i < (KEY_LEN/4); ++i)
711	{
712	copy_four ( (unsigned char *) &(cc[i]), h2[i - (KEY_LEN/8)]);
713	/* cc[i] = h2[i - (KEY_LEN/8)]; */
714	}
715	SH_FREE(inner);
716
717	res = sh_tiger_hash ((char *) &cc[0],
718	TIGER_DATA,
719	(unsigned long) (KEY_LEN/4 * sizeof(UINT32)));
720
721	SL_RETURN(res, _("sh_util_hmac_tiger"));
722	}
723
724	static char * sh_util_hash_tiger ( char * hexkey,
725	char * text, size_t textlen)
726	{
727	char * res;
728	char h2[2*KEY_LEN+1];
729	SL_ENTER(_("sh_util_hash_tiger"));
730
731	(void) sl_strlcpy(h2, hexkey, KEY_LEN+1);
732	(void) sl_strlcat(h2, sh_tiger_hash(text, TIGER_DATA,
733	(unsigned long) textlen), 2*KEY_LEN+1);
734
735	res = sh_tiger_hash(h2, TIGER_DATA, 2*KEY_LEN);
736
737	SL_RETURN(res, _("sh_util_hash_tiger"));
738	}
739
740	/* --- compute signature on data ---
741	*/
742	#define TYPE_HMAC 0
743	#define TYPE_HASH 1
744
745	static int sigtype = TYPE_HMAC;
746
747	int sh_util_sigtype (const char * c)
748	{
749	SL_ENTER(_("sh_util_sigtype"));
750	if (c == NULL)
751	SL_RETURN( -1, _("sh_util_sigtype"));
752
753	if (0 == strcmp(_("HMAC-TIGER"), c))
754	sigtype = TYPE_HMAC;
755	else if (0 == strcmp(_("HASH-TIGER"), c))
756	sigtype = TYPE_HASH;
757	else
758	SL_RETURN( -1, _("sh_util_sigtype"));
759
760	SL_RETURN( 0, _("sh_util_sigtype"));
761	}
762
763	char * sh_util_siggen (char * hexkey,
764	char * text, size_t textlen)
765	{
766	char * p;
767
768	SL_ENTER(_("sh_util_siggen"));
769	if (sigtype == TYPE_HMAC)
770	p = sh_util_hmac_tiger (hexkey,
771	text, textlen);
772	else
773	p = sh_util_hash_tiger (hexkey,
774	text, textlen);
775	SL_RETURN(p, _("sh_util_siggen"));
776	}
777
778
779	/* a simple compressor
780	*/
781	long sh_util_compress (char * dest, char * src, size_t dest_size)
782	{
783	char * add;
784	char * get;
785	size_t count = 0;
786	size_t dest_end;
787
788	SL_ENTER(_("sh_util_compress"));
789
790	if (dest_size == 0)
791	SL_RETURN((0), _("sh_util_compress"));
792
793	if ((dest == NULL) \|\| (src == NULL))
794	SL_RETURN((0), _("sh_util_compress"));
795
796	dest_end = sl_strlen(dest);
797
798	if (dest_end > dest_size)
799	SL_RETURN((0), _("sh_util_compress"));
800
801	add = &dest[dest_end];
802	get = src;
803
804	while (count < (dest_size-dest_end))
805	{
806	if (isalnum((int) *get))
807	{
808	add = get;
809	++add;
810	++count;
811	}
812	++get;
813	if (*get == '\0' && (count < (dest_size-dest_end)))
814	/* end of src reached */
815	{
816	add = get; /* copy the '\0' */
817	break; /* and stop copying */
818	}
819	}
820
821	dest[dest_size-1] = '\0'; /* paranoia */
822	SL_RETURN(((long)count), _("sh_util_compress")); /* no of chars copied */
823	}
824
825
826	/* copy the four least significant bytes
827	*/
828	void sh_util_cpylong (char * dest, const char * src, int len )
829	{
830	int i, j;
831	union
832	{
833	long l;
834	char c[sizeof(long)];
835	} u;
836
837	SL_ENTER(_("sh_util_cpylong"));
838
839	u.l = 1;
840
841	/* MSB is first
842	*/
843	if (sizeof(long)>4 &&/@+charint@/(u.c[sizeof(long)-1] == 1)/@-charint@/)
844	{
845	j = (int) (sizeof(long)-4);
846	for (i = 0; i < j; ++i) ++src;
847	}
848
849	i = 0;
850
851	while (i < 4)
852	{
853	dest = (src);
854	++dest; ++src;
855	if (i == (len-1)) break;
856	++i;
857	}
858	SL_RET0(_("sh_util_cpylong"));
859	}
860
861	/* This is a maximally equidistributed combined Tausworthe
862	* generator. The sequence is,
863	*
864	* x_n = (s1_n ^ s2_n ^ s3_n)
865	*
866	* s1_{n+1} = (((s1_n & 4294967294) <<12) ^ (((s1_n <<13) ^ s1_n) >>19))
867	* s2_{n+1} = (((s2_n & 4294967288) << 4) ^ (((s2_n << 2) ^ s2_n) >>25))
868	* s3_{n+1} = (((s3_n & 4294967280) <<17) ^ (((s3_n << 3) ^ s3_n) >>11))
869	*
870	* computed modulo 2^32. In the three formulas above '^' means
871	* exclusive-or (C-notation), not exponentiation. Note that the
872	* algorithm relies on the properties of 32-bit unsigned integers (it
873	* is formally defined on bit-vectors of length 32).
874	*
875	* Stolen from GSL (GNU scientific library) and modified somewhat.
876	* I am using UINT32, which is guaranteed to be 32 bits. Also made
877	* sure that the initialization vector is valid.
878	*/
879
880
881	/* interval [0, 4294967296]
882	*/
883	static UINT32 taus_get_long (void *vstate)
884	{
885	UINT32 * state = (UINT32 *) vstate;
886
887	if (skey->rngI == BAD)
888	(void)taus_seed();
889
890	#define TAUSWORTHE(s,a,b,c,d) ((s &c) <<d) ^ (((s <<a) ^s) >>b)
891	/@+ignorequals@/
892	state[0] = TAUSWORTHE (state[0], 13, 19, 4294967294UL, 12);
893	state[1] = TAUSWORTHE (state[1], 2, 25, 4294967288UL, 4);
894	state[2] = TAUSWORTHE (state[2], 3, 11, 4294967280UL, 17);
895	/@-ignorequals@/
896	return (state[0] ^ state[1] ^ state[2]);
897	}
898
899	/* Hide the internal state of the PRNG by using its output as
900	* input for a one-way hash function.
901	*/
902	UINT32 taus_svec[6];
903
904	UINT32 taus_get (void state1, void state2, void *state3)
905	{
906	UINT32 retval;
907	UINT32 * res;
908	static UINT32 res_vec[6];
909	static int res_num = 0;
910	register int i;
911
912	if (res_num > 0)
913	{
914	retval = res_vec[res_num];
915	res_num = (res_num == 5) ? 0 : (res_num + 1);
916	return retval;
917	}
918
919	taus_svec[0] = taus_get_long (state1);
920	taus_svec[1] = taus_get_long (state2);
921	taus_svec[2] = taus_get_long (state3);
922	taus_svec[3] = taus_get_long (state1);
923	taus_svec[4] = taus_get_long (state2);
924	taus_svec[5] = taus_get_long (state3);
925
926	res = sh_tiger_hash_uint32 ( (char *) &taus_svec[0],
927	TIGER_DATA,
928	(unsigned long)(6 * sizeof(UINT32)));
929
930	for (i = 1; i < 6; ++i)
931	{
932	res_vec[i] = res[i];
933	}
934	retval = taus_svec[0];
935	res_num = 1;
936
937	taus_svec[0] = 0; taus_svec[1] = 0; taus_svec[2] = 0;
938	taus_svec[3] = 0; taus_svec[4] = 0; taus_svec[5] = 0;
939
940	return retval;
941	}
942
943	/* interval [0,1)
944	*/
945	double taus_get_double (void *vstate)
946	{
947	return taus_get_long (vstate) / (4294967296.0 + 1.0) ;
948	}
949
950	#define LCG(n) ((69069 * n) & 0xffffffffUL)
951
952	/* TAKE CARE: state[0], state[1], state[2] must be > 2,8,16, respectively
953	*/
954	static void taus_set_from_ulong (void *vstate, unsigned long int s)
955	{
956	UINT32 state = (UINT32 ) vstate;
957
958	if (s == 0)
959	s = 1; /* default seed is 1 */
960
961	state[0] = (UINT32)(LCG (s) \| (UINT32) 0x03);
962	state[1] = (UINT32)(LCG (state[0]) \| (UINT32) 0x09);
963	state[2] = (UINT32)(LCG (state[1]) \| (UINT32) 0x17);
964
965	/* 'warm up'
966	*/
967	(void) taus_get_long (state);
968	(void) taus_get_long (state);
969	(void) taus_get_long (state);
970	(void) taus_get_long (state);
971	(void) taus_get_long (state);
972	(void) taus_get_long (state);
973
974	return;
975	}
976
977	static void taus_set_from_state (void vstate, void init_state)
978	{
979	UINT32 state = (UINT32 ) vstate;
980	UINT32 state0 = (UINT32 ) init_state;
981
982	state[0] = state0[0] \| (UINT32) 0x03;
983	state[1] = state0[1] \| (UINT32) 0x09;
984	state[2] = state0[2] \| (UINT32) 0x17;
985
986	return;
987	}
988
989
990	int taus_seed ()
991	{
992	char bufx[9 * sizeof(UINT32) + 1];
993	int status;
994	static unsigned long seed_time = 0;
995
996	SL_ENTER(_("taus_seed"));
997
998	if (skey->rngI == GOOD)
999	{
1000	if ( (sh_unix_longtime () - seed_time) < 3600)
1001	SL_RETURN( (0), _("taus_seed"));
1002	}
1003
1004	seed_time = sh_unix_longtime ();
1005
1006	status = sh_entropy (24, bufx);
1007
1008	if (!SL_ISERROR(status))
1009	{
1010	skey->rngI = GOOD;
1011	memcpy (&skey->rng0[0], &bufx[0], 2*sizeof(UINT32));
1012	memcpy (&skey->rng1[0], &bufx[2sizeof(UINT32)], 2sizeof(UINT32));
1013	memcpy (&skey->rng2[0], &bufx[4sizeof(UINT32)], 2sizeof(UINT32));
1014	memset (bufx, 0, 9 * sizeof(UINT32) + 1);
1015
1016	skey->rng0[2] = 0;
1017	skey->rng1[2] = 0;
1018	skey->rng2[2] = 0;
1019
1020	taus_set_from_state( &(skey->rng0[0]), &(skey->rng0[0]));
1021	taus_set_from_state( &(skey->rng1[0]), &(skey->rng1[0]));
1022	taus_set_from_state( &(skey->rng2[0]), &(skey->rng2[0]));
1023
1024	SL_RETURN( (0), _("taus_seed"));
1025	}
1026
1027	sh_error_handle ((-1), FIL__, __LINE__, status, MSG_ES_ENT,
1028	_("sh_entropy"));
1029
1030	/* emergency backup - unsafe !
1031	*/
1032	skey->rngI = GOOD;
1033	#ifdef HAVE_GETTIMEOFDAY
1034	taus_set_from_ulong ( &(skey->rng0[0]), LCG (sh_unix_notime()) );
1035	#else
1036	taus_set_from_ulong ( &(skey->rng0[0]), LCG (seed_time) );
1037	#endif
1038	taus_set_from_ulong ( &(skey->rng1[0]), LCG (skey->rng0[0]) );
1039	taus_set_from_ulong ( &(skey->rng2[0]), LCG (skey->rng1[0]) );
1040	skey->rngI = BAD;
1041
1042	SL_RETURN( (-1), _("taus_seed"));
1043	}
1044
1045	/@+charint@/
1046	static unsigned char new_key[] = { 0xA7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xA7 };
1047	/@-charint@/
1048	static void copy_four (unsigned char * dest, UINT32 in);
1049
1050	int sh_util_set_newkey (const char * new_in)
1051	{
1052	size_t i, j = 0;
1053	size_t len;
1054	SL_TICKET fp;
1055	SL_TICKET fout;
1056	char * key;
1057	char * path;
1058	char * outpath = NULL;
1059	unsigned char * image = NULL;
1060	long s = 0;
1061	long ilen = 0;
1062	long ii, k = 0;
1063	UINT32 * h1;
1064	char * new = NULL;
1065
1066	if (0 != sl_is_suid())
1067	{
1068	fprintf(stderr, _("ERROR: insufficient privilege\n"));
1069	_exit (EXIT_FAILURE);
1070	/@notreached@/
1071	return -1; /* braindead MAC OSX compiler needs this */
1072	}
1073
1074	if (new_in == NULL \|\| new_in[0] == '\0')
1075	{
1076	fprintf(stderr,
1077	_("ERROR: no key given\n Argument must be 'key@path'\n"));
1078	_exit (EXIT_FAILURE);
1079	/@notreached@/
1080	return -1;
1081	}
1082
1083	if (NULL == (new = malloc(strlen(new_in) + 1)))
1084	goto bail_mem;
1085	sl_strncpy(new, new_in, strlen(new_in) + 1);
1086
1087	key = new;
1088	len = strlen(new);
1089	for (i = 1; i < (len-2); ++i)
1090	{
1091	if (new[i] == '@' && new[i+1] == '/')
1092	{
1093	j = i+1; new[i] = '\0'; break;
1094	}
1095	}
1096	if (j == 0)
1097	{
1098	fprintf(stderr,
1099	_("ERROR: no path to executable given\n Argument must be 'key@path'\n"));
1100	free(new);
1101	_exit (EXIT_FAILURE);
1102	/@notreached@/
1103	return -1;
1104	}
1105	else
1106	path = &new[j];
1107
1108	len = strlen(path) + 1 + 4;
1109	/@-usedef@/
1110	if (NULL == (outpath = malloc(len)))
1111	goto bail_mem;
1112	/@-usedef@/
1113	sl_snprintf (outpath, len, _("%s.out"), path);
1114
1115	fp = sl_open_read(path, SL_NOPRIV);
1116	if (SL_ISERROR(fp))
1117	{
1118	fprintf(stderr,
1119	_("ERROR: cannot open %s for read (errnum = %ld)\n"), path, fp);
1120	free(new); free (outpath);
1121	_exit (EXIT_FAILURE);
1122	/@notreached@/
1123	return -1;
1124	}
1125
1126	fout = sl_open_write(outpath, SL_NOPRIV);
1127	if (SL_ISERROR(fout))
1128	{
1129	fprintf(stderr,
1130	_("ERROR: cannot open %s (errnum = %ld)\n"), outpath, fout);
1131	free(new); free (outpath);
1132	_exit (EXIT_FAILURE);
1133	/@notreached@/
1134	return -1;
1135	}
1136
1137
1138	image = malloc (4096);
1139	if (!image)
1140	goto bail_mem;
1141	while (0 < (ii = sl_read (fp, &image[s], 4096)))
1142	{
1143	ilen += ii;
1144	s += 4096;
1145	image = realloc (image, (size_t) (4096 + s));
1146	if (!image)
1147	goto bail_mem;
1148	}
1149
1150	printf(_("%ld bytes read\n"), ilen);
1151
1152
1153	for (k = 0; k < (ilen - 8); ++k)
1154	{
1155	if (image[k] == new_key[0] &&
1156	image[k+1] == new_key[1] &&
1157	image[k+2] == new_key[2] &&
1158	image[k+3] == new_key[3] &&
1159	image[k+4] == new_key[4] &&
1160	image[k+5] == new_key[5] &&
1161	image[k+6] == new_key[6] &&
1162	image[k+7] == new_key[7])
1163	{
1164	printf(_("old key found\n"));
1165	h1 = sh_tiger_hash_uint32 (key, TIGER_DATA,
1166	(unsigned long)strlen(key));
1167	copy_four( (unsigned char *) &(image[k]), h1[0]);
1168	copy_four( (unsigned char *) &(image[k+4]), h1[1]);
1169	(void) sl_write (fout, image, ilen);
1170	(void) sl_close (fout);
1171	printf(_("new file %s written\n"), outpath);
1172	free(new); free (outpath); free(image);
1173	_exit (EXIT_SUCCESS);
1174	/@notreached@/
1175	return 0;
1176	}
1177	}
1178
1179	fprintf(stderr,
1180	_("ERROR: old key not found\n"));
1181	free(new); free (outpath); free(image);
1182	_exit (EXIT_FAILURE);
1183	/@notreached@/
1184	return -1;
1185
1186
1187	bail_mem:
1188	fprintf(stderr,
1189	_("ERROR: out of memory\n"));
1190	if (new) free(new);
1191	if (outpath) free (outpath);
1192	if (image) free (image);
1193	_exit (EXIT_FAILURE);
1194	/@notreached@/
1195	return -1;
1196	}
1197
1198
1199
1200
1201	/* A simple en-/decoder, based on Vernam cipher. We use the
1202	* message as salt to hide the key by obtaining a different one-time
1203	* pad each time.
1204	* Should be safe against a listener on the network, but not against someone
1205	* with read access to the binary.
1206	*/
1207	void sh_util_encode (char * data, char * salt, int mode, char fill)
1208	{
1209	static char cc1[17] = N_("0123456789ABCDEF");
1210	char cc[17] = "\0";
1211	register int i, j, j1 = 0, j2 = 0, j3;
1212	char * dez;
1213
1214	SL_ENTER(_("sh_util_encode"));
1215
1216	/* init
1217	*/
1218	(void) sl_strlcpy( cc, _(cc1), sizeof(cc));
1219
1220	/* max 128 bits keyspace
1221	*/
1222	memset (skey->vernam, (int)fill, KEY_LEN+1);
1223
1224	dez = (char *) &(skey->ErrFlag[0]);
1225	sh_util_cpylong (skey->vernam, dez, 4);
1226	dez = (char *) &(skey->ErrFlag[1]);
1227	sh_util_cpylong (&skey->vernam[4], dez, 4);
1228
1229	skey->vernam[KEY_LEN] = '\0';
1230
1231	(void) sl_strlcpy(skey->vernam,
1232	sh_tiger_hash(skey->vernam, TIGER_DATA, KEY_LEN),
1233	KEY_LEN+1);
1234
1235	(void) sl_strlcpy(skey->vernam,
1236	sh_util_hmac_tiger (skey->vernam, salt, strlen(salt)),
1237	KEY_LEN+1);
1238
1239	(void) sl_strlcpy(skey->vernam,
1240	sh_util_hmac_tiger (skey->vernam, (char*) new_key, 8),
1241	KEY_LEN+1);
1242
1243	/* The following routine adds/subtracts data[j] and vernam[j] mod 16.
1244	*/
1245	j = 0;
1246	while (j < KEY_LEN)
1247	{
1248	for (i = 0; i < 16; ++i)
1249	{
1250	if (cc[i] == data[j]) j1 = i;
1251	if (cc[i] == skey->vernam[j]) j2 = i;
1252	}
1253	if (mode == 0)
1254	{
1255	j3 = j1 + j2;
1256	if (j3 > 15) j3 -= 16;
1257	data[j] = cc[j3];
1258	}
1259	else
1260	{
1261	j3 = j1 - j2;
1262	if (j3 < 0) j3 += 16;
1263	data[j] = cc[j3];
1264	}
1265	++j;
1266	}
1267	SL_RET0(_("sh_util_encode"));
1268	}
1269
1270	/* server mode
1271	*/
1272	int sh_util_setserver (const char * dummy)
1273	{
1274	SL_ENTER(_("sh_util_setserver"));
1275
1276	(void) dummy;
1277	sh.flag.isserver = GOOD;
1278	SL_RETURN((0),_("sh_util_setserver"));
1279	}
1280
1281
1282	int sh_util_setlooptime (const char * str)
1283	{
1284	int i = atoi (str);
1285
1286	SL_ENTER(_("sh_util_setlooptime"));
1287
1288	if (i >= 0 && i < INT_MAX) {
1289	sh.looptime = i;
1290	SL_RETURN((0),_("sh_util_setlooptime"));
1291	} else {
1292	sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
1293	_("loop time"), str);
1294	SL_RETURN((-1),_("sh_util_setlooptime"));
1295	}
1296	}
1297
1298	#if defined (SH_WITH_CLIENT) \|\| defined (SH_STANDALONE)
1299	int sh_util_setchecksum (const char * str)
1300	{
1301	static int reject = 0;
1302
1303	SL_ENTER(_("sh_util_setchecksum"));
1304
1305	if (reject == 1)
1306	SL_RETURN((0), _("sh_util_setchecksum"));
1307	reject = 1;
1308
1309	if (sl_strncmp (str, _("init"), sizeof("init")-1) == 0)
1310	{
1311	sh.flag.checkSum = SH_CHECK_INIT;
1312	}
1313	else if (sl_strncmp (str, _("update"), sizeof("update")-1) == 0)
1314	{
1315	if (S_TRUE == file_is_remote())
1316	{
1317	sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
1318	_("checksum testing"), str);
1319	SL_RETURN((-1), _("sh_util_setchecksum"));
1320	}
1321	else
1322	{
1323	sh.flag.checkSum = SH_CHECK_CHECK;
1324	sh.flag.update = S_TRUE;
1325	}
1326	}
1327	else if (sl_strncmp (str, _("check"), sizeof("check")-1) == 0)
1328	{
1329	sh.flag.checkSum = SH_CHECK_CHECK;
1330	}
1331	/*
1332	else if (sl_strncmp (str, _("update"), sizeof("update")-1) == 0)
1333	{
1334	sh.flag.checkSum = SH_CHECK_INIT;
1335	sh.flag.update = S_TRUE;
1336	}
1337	*/
1338	else if (sl_strncmp (str, _("none"), sizeof("none")-1) == 0)
1339	{
1340	sh.flag.checkSum = SH_CHECK_NONE;
1341	}
1342	else
1343	{
1344	sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
1345	_("checksum testing"), str);
1346	SL_RETURN((-1), _("sh_util_setchecksum"));
1347	}
1348	SL_RETURN((0), _("sh_util_setchecksum"));
1349	}
1350	#endif
1351
1352	/@+charint@/
1353	unsigned char TcpFlag[8][PW_LEN+1] = {
1354	#if (POS_TF == 1)
1355	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1356	#endif
1357	{ 0xFF,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xFF,0x00 },
1358	#if (POS_TF == 2)
1359	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1360	#endif
1361	{ 0xFF,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xFF,0x00 },
1362	#if (POS_TF == 3)
1363	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1364	#endif
1365	{ 0xFF,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xFF,0x00 },
1366	#if (POS_TF == 4)
1367	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1368	#endif
1369	{ 0xFF,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xFF,0x00 },
1370	#if (POS_TF == 5)
1371	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1372	#endif
1373	{ 0xFF,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xFF,0x00 },
1374	#if (POS_TF == 6)
1375	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1376	#endif
1377	{ 0xFF,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xFF,0x00 },
1378	#if (POS_TF == 7)
1379	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1380	#endif
1381	{ 0xFF,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xFF,0x00 },
1382	#if (POS_TF == 8)
1383	{ 0xF7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xF7,0x00 },
1384	#endif
1385	};
1386	/@-charint@/
1387
1388	/* initialize a key to a random value
1389	* rev 0.8
1390	*/
1391	int sh_util_keyinit (char * buf, long size)
1392	{
1393	UINT32 bufy[6];
1394	int i;
1395	int status = 0;
1396	char * p;
1397
1398	SL_ENTER(_("sh_util_keyinit"));
1399
1400	ASSERT((size <= KEY_LEN+1), _("size <= KEY_LEN+1"))
1401
1402	if (size > KEY_LEN+1)
1403	size = KEY_LEN+1;
1404
1405	/* seed / re-seed the PRNG if required
1406	*/
1407	status = taus_seed ();
1408
1409	if (status == -1)
1410	sh_error_handle ((-1), FIL__, __LINE__, -1, MSG_ES_KEY1,
1411	_("taus_seed"));
1412
1413	for (i = 0; i < 6; ++i)
1414	bufy[i] = taus_get(&(skey->rng0[0]), &(skey->rng1[0]), &(skey->rng2[0]));
1415
1416	p = sh_tiger_hash ((char *) bufy, TIGER_DATA,
1417	(unsigned long)(6*sizeof(UINT32)));
1418	p[size-1] = '\0';
1419
1420	i = sl_strlcpy(buf, p, (size_t)size);
1421
1422	memset (bufy, 0, 6*sizeof(UINT32));
1423
1424	if ((status == 0) && (!SL_ISERROR(i)) )
1425	SL_RETURN((0),_("sh_util_keyinit"));
1426
1427	if (SL_ISERROR(i))
1428	sh_error_handle ((-1), FIL__, __LINE__, i, MSG_ES_KEY2,
1429	_("sl_strlcpy"));
1430
1431	SL_RETURN((-1),_("sh_util_keyinit"));
1432	}
1433
1434	#if defined(SH_WITH_CLIENT) \|\| defined(SH_STANDALONE)
1435
1436	static unsigned char sh_obscure_index[256];
1437	static int sh_obscure_no_check = S_FALSE;
1438
1439	int sh_util_valid_utf8 (const unsigned char * str)
1440	{
1441	const int sh_val_utf8_1 = 1;
1442	const int sh_val_utf8_2 = 2;
1443	const int sh_val_utf8_3 = 3;
1444	const int sh_val_utf8_4 = 4;
1445
1446	size_t len = strlen((char *)str);
1447	size_t l = 0;
1448	int typ = 0;
1449	unsigned char c = '\0';
1450	unsigned char c2[2] = { 0x00, 0x00 };
1451	unsigned char c3[3] = { 0x00, 0x00, 0x00 };
1452
1453
1454	#define SH_VAL_UTF8_1 ((c != '\0') && ((c & 0x80) == 0x00))
1455	#define SH_VAL_UTF8_2 ((c != '\0') && ((c & 0xE0) == 0xC0)) /* 110x xxxx */
1456	#define SH_VAL_UTF8_3 ((c != '\0') && ((c & 0xF0) == 0xE0)) /* 1110 xxxx */
1457	#define SH_VAL_UTF8_4 ((c != '\0') && ((c & 0xF8) == 0xF0)) /* 1111 0xxx */
1458	#define SH_VAL_UTF8_N ((c != '\0') && ((c & 0xC0) == 0x80)) /* 10xx xxxx */
1459	#define SH_VAL_BAD ((c == '"') \|\| (c == '\t') \|\| (c == '\b') \|\| \
1460	(c == '\f') \|\| (c == '\n') \|\| \
1461	(c == '\r') \|\| (c == '\v') \|\| iscntrl((int) c) \|\| \
1462	(c != ' ' && !isgraph ((int) c)))
1463
1464	while(l < len)
1465	{
1466	c = str[l];
1467
1468	if (SH_VAL_UTF8_1)
1469	{
1470	if (!(SH_VAL_BAD && (sh_obscure_index[c] != 1)))
1471	{
1472	typ = sh_val_utf8_1;
1473	++l; continue;
1474	}
1475	else
1476	{
1477	return S_FALSE;
1478	}
1479	}
1480	else if (SH_VAL_UTF8_2)
1481	{
1482	typ = sh_val_utf8_2;
1483	c2[0] = c;
1484	if ((c & 0x3e) != 0x00) /* !(overlong 2-byte seq.) */
1485	{
1486	++l;
1487	if (l != len) {
1488	c = str[l];
1489	if(SH_VAL_UTF8_N) {
1490	c2[1] = c;
1491	++l; continue;
1492	}
1493	else {
1494	return S_FALSE;
1495	}
1496	}
1497	else {
1498	return S_FALSE;
1499	}
1500	}
1501	else
1502	{
1503	return S_FALSE; /* overlong 2-byte seq. */
1504	}
1505	}
1506	else if (SH_VAL_UTF8_3)
1507	{
1508	typ = sh_val_utf8_3;
1509	c3[0] = c;
1510	++l; if (l == len) return S_FALSE; c = str[l];
1511	if(!SH_VAL_UTF8_N) return S_FALSE;
1512	if (((str[l-1] & 0x1F) == 0x00) && ((c & 0x60) == 0x00))
1513	return S_FALSE; /* overlong 3-byte seq. */
1514	c3[1] = c;
1515	++l; if (l == len) return S_FALSE; c = str[l];
1516	if(!SH_VAL_UTF8_N) return S_FALSE;
1517	c3[2] = c;
1518	++l; continue;
1519	}
1520	else if (SH_VAL_UTF8_4)
1521	{
1522	typ = sh_val_utf8_4;
1523	++l; if (l == len) return S_FALSE; c = str[l];
1524	if(!SH_VAL_UTF8_N) return S_FALSE;
1525	if (((str[l-1] & 0x0F) == 0x00) && ((c & 0x70) == 0x00))
1526	return S_FALSE; /* overlong 4-byte seq. */
1527	++l; if (l == len) return S_FALSE; c = str[l];
1528	if(!SH_VAL_UTF8_N) return S_FALSE;
1529	++l; if (l == len) return S_FALSE; c = str[l];
1530	if(!SH_VAL_UTF8_N) return S_FALSE;
1531	++l; continue;
1532	}
1533	return S_FALSE;
1534	}
1535
1536	/* last character is invisible (space or else)
1537	*/
1538	if (typ == sh_val_utf8_1)
1539	{
1540	if (c != ' ')
1541	return S_TRUE;
1542	else
1543	return S_FALSE;
1544	}
1545	else if (typ == sh_val_utf8_2)
1546	{
1547	if (c2[0] == 0xC2 && c2[1] == 0xA0) /* nbsp */
1548	return S_FALSE;
1549	else
1550	return S_TRUE;
1551	}
1552	else if (typ == sh_val_utf8_3)
1553	{
1554	if (c3[0] == 0xE2)
1555	{
1556	if (c3[1] == 0x80 && c3[2] >= 0x80 && c3[2] <= 0x8F)
1557	return S_FALSE; /* various spaces, left-to-right, right-to-left */
1558	else if (c3[1] == 0x80 && (c3[2] == 0xA8 \|\| c3[2] == 0xA9 \|\|
1559	c3[2] == 0xAD \|\| c3[2] == 0xAF))
1560	return S_FALSE; /* line sep, para sep, zw word joiner, nnbsp */
1561	else if (c3[1] == 0x81 && (c3[2] == 0xA0 \|\| c3[2] == 0xA1 \|\|
1562	c3[2] == 0x9F))
1563	return S_FALSE; /* word joiner, function app, math space */
1564	else
1565	return S_TRUE;
1566	}
1567	else if (c3[0] == 0xE3 && c3[1] == 0x80 && c3[2] == 0x80)
1568	{
1569	return S_FALSE; /* ideographic space */
1570	}
1571	else if (c3[0] == 0xEF && c3[1] == 0xBB && c3[2] == 0xBF)
1572	{
1573	return S_FALSE; /* zwnbsp */
1574	}
1575	else
1576	{
1577	return S_TRUE;
1578	}
1579	}
1580	else
1581	{
1582	return S_TRUE;
1583	}
1584	}
1585
1586
1587	int sh_util_obscure_ok (const char * str)
1588	{
1589	unsigned long i;
1590	char * endptr = NULL;
1591
1592	SL_ENTER(_("sh_util_obscure_ok"));
1593
1594	if (0 == sl_strncmp("all", str, 3))
1595	{
1596	for (i = 0; i < 255; ++i)
1597	{
1598	sh_obscure_index[i] = (unsigned char)1;
1599	}
1600	sh_obscure_no_check = S_TRUE;
1601	SL_RETURN(0, _("sh_util_obscure_ok"));
1602	}
1603
1604	sh_obscure_no_check = S_FALSE;
1605
1606	for (i = 0; i < 255; ++i)
1607	{
1608	sh_obscure_index[i] = (unsigned char)0;
1609	}
1610
1611	i = strtoul (str, &endptr, 0);
1612	if (i > 255)
1613	{
1614	SL_RETURN(-1, _("sh_util_obscure_ok"));
1615	}
1616	sh_obscure_index[i] = (unsigned char)1;
1617	if (*endptr == ',')
1618	++endptr;
1619
1620	while (*endptr != '\0')
1621	{
1622	i = strtoul (endptr, &endptr, 0);
1623	if (i > 255)
1624	{
1625	SL_RETURN(-1, _("sh_util_obscure_ok"));
1626	}
1627	sh_obscure_index[i] = (unsigned char)1;
1628	if (*endptr == ',')
1629	++endptr;
1630	}
1631	SL_RETURN(0, _("sh_util_obscure_ok"));
1632	}
1633
1634	static int sh_obscure_check_utf8 = S_FALSE;
1635
1636	int sh_util_obscure_utf8 (const char * c)
1637	{
1638	int i;
1639	SL_ENTER(_("sh_util_obscure_utf8"));
1640	i = sh_util_flagval(c, &(sh_obscure_check_utf8));
1641	if (sh_obscure_check_utf8 == S_TRUE)
1642	sh_obscure_no_check = S_FALSE;
1643	SL_RETURN(i, _("sh_util_obscure_utf8"));
1644	}
1645
1646
1647	int sh_util_obscurename (ShErrLevel level, char * name_orig, int flag)
1648	{
1649	unsigned char * name = (unsigned char *) name_orig;
1650	char * safe;
1651	unsigned int i;
1652	size_t len = 0;
1653
1654	SL_ENTER(_("sh_util_obscurename"));
1655
1656	ASSERT_RET((name != NULL), _("name != NULL"), (0))
1657
1658	if (sh_obscure_no_check == S_FALSE)
1659	{
1660	if (sh_obscure_check_utf8 != S_TRUE)
1661	{
1662	/* -- Check name. --
1663	*/
1664	while (*name != '\0')
1665	{
1666	if ( (name) > 0x7F \|\| (name) == '"' \|\| (*name) == '\t' \|\|
1667	(name) == '\b' \|\| (name) == '\f' \|\|
1668	(name) == '\n' \|\| (name) == '\r' \|\|
1669	(name) == '\v' \|\| iscntrl((int) name) \|\|
1670	((name) != ' ' && !isgraph ((int) name)) )
1671	{
1672	i = (unsigned char) *name;
1673	if (sh_obscure_index[i] != (unsigned char)1)
1674	{
1675	goto err;
1676	}
1677	}
1678	name++; ++len;
1679	}
1680
1681	/* Check for blank at end of name
1682	*/
1683	if ((len > 0) && (name_orig[len-1] == ' '))
1684	{
1685	goto err;
1686	}
1687	}
1688	else
1689	{
1690	if (S_FALSE == sh_util_valid_utf8(name))
1691	{
1692	goto err;
1693	}
1694	SL_RETURN((0),_("sh_util_obscurename"));
1695	}
1696	}
1697
1698	SL_RETURN((0),_("sh_util_obscurename"));
1699
1700	err:
1701
1702	if (flag == S_TRUE)
1703	{
1704	safe = sh_util_safe_name (name_orig);
1705	sh_error_handle (level, FIL__, __LINE__, 0, MSG_FI_OBSC,
1706	safe);
1707	SH_FREE(safe);
1708	}
1709	SL_RETURN((-1),_("sh_util_obscurename"));
1710	}
1711
1712	#endif
1713
1714	/* returns freshly allocated memory, return value should be free'd
1715	*/
1716	char * sh_util_dirname(const char * fullpath)
1717	{
1718	char * retval;
1719	size_t len;
1720
1721	SL_ENTER(_("sh_util_dirname"));
1722
1723	ASSERT_RET ((fullpath != NULL), _("fullpath != NULL"), (NULL))
1724
1725	len = sl_strlen (fullpath); /* fullpath[i] is terminating '\0' */
1726
1727	if (len > 1 && fullpath[len-1] == '/') /* skip trailing '/' */
1728	--len;
1729
1730	while (len > 0) {
1731	--len;
1732	if (fullpath[len] == '/')
1733	{
1734	if (len == 0) ++len; /* copy the '/' to output */
1735	break;
1736	}
1737	}
1738
1739	/* -- Not an absolute path. --
1740	*/
1741	if ((len == 0) && (fullpath[len] != '/'))
1742	{
1743	SL_RETURN(NULL, _("sh_util_dirname"));
1744	}
1745
1746	retval = SH_ALLOC(len + 1);
1747	(void) sl_strlcpy (retval, fullpath, len+1);
1748
1749	SL_RETURN(retval, _("sh_util_dirname"));
1750	}
1751
1752	/* returns freshly allocated memory, return value should be free'd
1753	*/
1754	char * sh_util_basename(const char * fullpath)
1755	{
1756	char * retval = NULL;
1757	char * tmp;
1758	char * c;
1759	size_t len;
1760
1761	SL_ENTER(_("sh_util_basename"));
1762
1763	ASSERT_RET ((fullpath != NULL), _("fullpath != NULL"), (NULL))
1764
1765	c = strrchr(fullpath, '/');
1766	len = sl_strlen (c);
1767
1768	if (c == fullpath)
1769	{
1770	if (len <= 1)
1771	retval = sh_util_strdup(c);
1772	else
1773	retval = sh_util_strdup(++c);
1774	}
1775	else
1776	{
1777	if (len > 1)
1778	{
1779	retval = sh_util_strdup(++c);
1780	}
1781	else
1782	{
1783	/* input ends in '/' */
1784	tmp = sh_util_strdup(fullpath);
1785	tmp[strlen(tmp)-1] = '\0';
1786	retval = sh_util_basename(tmp);
1787	SH_FREE(tmp);
1788	}
1789	}
1790
1791	SL_RETURN(retval, _("sh_util_basename"));
1792	}
1793
1794
1795	/* returns freshly allocated memory, return value should be free'd
1796	*/
1797	char * sh_util_safe_name (const char * name)
1798	{
1799	register int i = 0;
1800	const char * p;
1801	char * retval;
1802	char oct[32];
1803	char format[16];
1804	size_t len;
1805
1806	SL_ENTER(_("sh_util_safe_name"));
1807
1808	if (name == NULL)
1809	{
1810	/* return an allocated array
1811	*/
1812	retval = SH_ALLOC(7);
1813	(void) sl_strlcpy(retval, _("(null)"), 7);
1814	SL_RETURN(retval, _("sh_util_safe_name"));
1815	}
1816
1817	/*
1818	ASSERT_RET ((name != NULL), _("name != NULL"), _("NULL"))
1819	*/
1820
1821	len = sl_strlen(name);
1822	p = name;
1823
1824	#ifdef SH_USE_XML
1825	if (sl_ok_muls (6, len) && sl_ok_adds ((6*len), 2))
1826	{ retval = SH_ALLOC(6 * len + 2); }
1827	else
1828	{
1829	/* return an allocated array
1830	*/
1831	retval = SH_ALLOC(11);
1832	(void) sl_strlcpy(retval, _("(overflow)"), 11);
1833	SL_RETURN(retval, _("sh_util_safe_name"));
1834	}
1835	#else
1836	if (sl_ok_muls (4, len) && sl_ok_adds ((4*len), 2))
1837	{ retval = SH_ALLOC(4 * len + 2); }
1838	else
1839	{
1840	/* return an allocated array
1841	*/
1842	retval = SH_ALLOC(11);
1843	(void) sl_strlcpy(retval, _("(overflow)"), 11);
1844	SL_RETURN(retval, _("sh_util_safe_name"));
1845	}
1846	#endif
1847
1848	(void) sl_strncpy(format, _("%c%03o"), 16);
1849
1850	while (*p != '\0') {
1851	/* Most frequent cases first
1852	*/
1853	if ( ((p) >= 'a' && (p) <= 'z') \|\| ((p) == '/') \|\| ((p) == '.') \|\|
1854	((p) >= '0' && (p) <= '9') \|\|
1855	((p) >= 'A' && (p) <= 'Z')) {
1856	retval[i] = *p;
1857	} else if ( (p) == '\\') { / backslash */
1858	retval[i] = '\\'; ++i;
1859	retval[i] = '\\';
1860	} else if ( (p) == '\n') { / newline */
1861	retval[i] = '\\'; ++i;
1862	retval[i] = 'n';
1863	} else if ( (p) == '\b') { / backspace */
1864	retval[i] = '\\'; ++i;
1865	retval[i] = 'b';
1866	} else if ( (p) == '\r') { / carriage return */
1867	retval[i] = '\\'; ++i;
1868	retval[i] = 'r';
1869	} else if ( (p) == '\t') { / horizontal tab */
1870	retval[i] = '\\'; ++i;
1871	retval[i] = 't';
1872	} else if ( (p) == '\v') { / vertical tab */
1873	retval[i] = '\\'; ++i;
1874	retval[i] = 'v';
1875	} else if ( (p) == '\f') { / form-feed */
1876	retval[i] = '\\'; ++i;
1877	retval[i] = 'f';
1878	#ifdef WITH_DATABASE
1879	} else if ( (p) == '\'') { / single quote */
1880	retval[i] = '\\'; ++i;
1881	retval[i] = '\'';
1882	#endif
1883	} else if ( (p) == ' ') { / space */
1884	retval[i] = '\\'; ++i;
1885	retval[i] = ' ';
1886	#ifdef SH_USE_XML
1887	} else if ( (p) == '"') { / double quote */
1888	retval[i] = '&'; ++i;
1889	retval[i] = 'q'; ++i;
1890	retval[i] = 'u'; ++i;
1891	retval[i] = 'o'; ++i;
1892	retval[i] = 't'; ++i;
1893	retval[i] = ';';
1894	} else if ( (p) == '&') { / ampersand */
1895	retval[i] = '&'; ++i;
1896	retval[i] = 'a'; ++i;
1897	retval[i] = 'm'; ++i;
1898	retval[i] = 'p'; ++i;
1899	retval[i] = ';';
1900	} else if ( (p) == '<') { / left angle */
1901	retval[i] = '&'; ++i;
1902	retval[i] = 'l'; ++i;
1903	retval[i] = 't'; ++i;
1904	retval[i] = ';';
1905	} else if ( (p) == '>') { / right angle */
1906	retval[i] = '&'; ++i;
1907	retval[i] = 'g'; ++i;
1908	retval[i] = 't'; ++i;
1909	retval[i] = ';';
1910	#else
1911	} else if ( (p) == '"') { / double quote */
1912	retval[i] = '\\'; ++i;
1913	retval[i] = '\"';
1914	#endif
1915	} else if (!isgraph ((int) p)) { / not printable */
1916	/@-bufferoverflowhigh -formatconst@/
1917	/* flawfinder: ignore */
1918	sprintf(oct, format, '\\', /* known to fit */
1919	(unsigned char) *p);
1920	/@+bufferoverflowhigh +formatconst@/
1921	retval[i] = oct[0]; ++i;
1922	retval[i] = oct[1]; ++i;
1923	retval[i] = oct[2]; ++i;
1924	retval[i] = oct[3];
1925	} else {
1926	retval[i] = *p;
1927	}
1928	++p;
1929	++i;
1930	}
1931	retval[i] = '\0';
1932	SL_RETURN(retval, _("sh_util_safe_name"));
1933	}
1934
1935	int sh_util_isnum (char *str)
1936	{
1937	char *p = str;
1938
1939	SL_ENTER(_("sh_util_isnum"));
1940
1941	ASSERT_RET ((str != NULL), _("str != NULL"), (-1))
1942
1943	while (p) {
1944	if (!isdigit((int) *p) )
1945	SL_RETURN((-1), _("sh_util_isnum"));
1946	++p;
1947	}
1948	SL_RETURN((0), _("sh_util_isnum"));
1949	}
1950
1951	char * sh_util_strconcat (const char * arg1, ...)
1952	{
1953	size_t length, l2;
1954	char * s;
1955	char * strnew;
1956	va_list vl;
1957
1958	SL_ENTER(_("sh_util_strconcat"));
1959
1960	ASSERT_RET ((arg1 != NULL), _("arg1 != NULL"), (NULL))
1961
1962	length = sl_strlen (arg1) + 1;
1963
1964	va_start (vl, arg1);
1965	s = va_arg (vl, char * );
1966	while (s != NULL)
1967	{
1968	l2 = sl_strlen (s);
1969	if (sl_ok_adds(length, l2))
1970	length += l2;
1971	else
1972	SL_RETURN(NULL, _("sh_util_strconcat"));
1973	s = va_arg (vl, char * );
1974	}
1975	va_end (vl);
1976
1977	if (sl_ok_adds(length, 2))
1978	strnew = SH_ALLOC( length + 2 );
1979	else
1980	SL_RETURN(NULL, _("sh_util_strconcat"));
1981
1982	strnew[0] = '\0';
1983
1984	(void) sl_strlcpy (strnew, arg1, length + 2);
1985
1986	va_start (vl, arg1);
1987	s = va_arg (vl, char * );
1988	while (s)
1989	{
1990	(void) sl_strlcat (strnew, s, length + 2);
1991	s = va_arg (vl, char * );
1992	}
1993	va_end (vl);
1994
1995	SL_RETURN(strnew, _("sh_util_strconcat"));
1996	}
1997
1998
1999	#ifdef HAVE_REGEX_H
2000
2001	#include <regex.h>
2002
2003	int sh_util_regcmp (char * regex_str, char * in_str)
2004	{
2005	#if defined(REG_ESPACE)
2006	int status = REG_ESPACE;
2007	#else
2008	int status = -1;
2009	#endif
2010	regex_t preg;
2011	char * errbuf;
2012
2013	SL_ENTER(_("sh_util_regcmp"));
2014
2015	status = regcomp(&preg, regex_str, REG_NOSUB\|REG_EXTENDED);
2016
2017	if (status == 0)
2018	{
2019	if ((status = regexec(&preg, in_str, 0, NULL, 0)) == 0)
2020	{
2021	regfree (&preg);
2022	SL_RETURN((0), _("sh_util_regcmp"));
2023	}
2024	}
2025
2026	if (status != 0 && status != REG_NOMATCH)
2027	{
2028	errbuf = SH_ALLOC(BUFSIZ);
2029	(void) regerror(status, &preg, errbuf, BUFSIZ);
2030	errbuf[BUFSIZ-1] = '\0';
2031	sh_error_handle ((-1), FIL__, __LINE__, status, MSG_E_REGEX,
2032	errbuf, regex_str);
2033	SH_FREE(errbuf);
2034	}
2035
2036	regfree (&preg);
2037	SL_RETURN((-1), _("sh_util_regcmp"));
2038	}
2039
2040	#endif
2041
2042
2043
2044
2045
2046
2047
2048

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

Download in other formats: