source: trunk/src/sh_utils.c@ 110

Last change on this file since 110 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
RevLine 
[1]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
51UINT32 ErrFlag[2];
52
[20]53int sh_util_flagval(const char * c, int * fval)
[1]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
73int 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
101static int sh_ask_update = S_FALSE;
102
[20]103int sh_util_set_interactive(const char * str)
[1]104{
[20]105 (void) str;
[1]106
[20]107 sh_ask_update = S_TRUE;
108
[1]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
121int 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
[22]191int sh_util_hidesetup(const char * c)
[1]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}
[68]199
200char * 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}
[76]270
271
272char * 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
[1]293char * sh_util_strdup (const char * str)
294{
295 char * p = NULL;
296 size_t len;
297
298 SL_ENTER(_("sh_util_strdup"));
299
[25]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
[1]306 SL_RETURN( p, _("sh_util_strdup"));
307}
308
309/* by the eircom.net computer incident
310 * response team
311 */
312char * 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
[25]319 SH_VALIDATE_NE(ret, NULL);
[1]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
[13]337/* returned string must be free'd by caller.
[1]338 */
339char * 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
[13]352 char * clist[16] = { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
353 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL };
[1]354 int nn = 0;
355
356 SL_ENTER(_("sh_util_formatted"));
357
[13]358 if (formatt == NULL || ftab == NULL || *formatt == '\0')
[1]359 SL_RETURN(NULL, _("sh_util_formatted"));
360
361 /* -- save the format (we overwrite it !!) --
362 */
363 size = sl_strlen(formatt);
364
[34]365 if (!sl_ok_adds(size, 1))
366 SL_RETURN(NULL, _("sh_util_formatted"));
[13]367
[34]368 ++size;
369 fmt = SH_ALLOC(size);
370 (void) sl_strlcpy(fmt, formatt, size);
371
[1]372 p = fmt;
373
374 j = 0;
[13]375 while (ftab[j].fchar != '\0') {
376 if (ftab[j].type != S_FMT_STRING)
377 ftab[j].data_str = NULL;
378 ++j;
379 }
380
[1]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
[13]413 switch(ftab[j].type) {
414
415 case S_FMT_STRING:
[1]416 {
417 isiz = sl_strlen(ftab[j].data_str);
[34]418 if (isiz > 0 && sl_ok_adds(size, isiz))
[1]419 {
420 size += isiz;
421 clist[nn] = ftab[j].data_str;
422 ++nn;
423 }
424 else
425 *q = '%';
[13]426 goto endsrch;
[1]427 }
[13]428 break;
429
430 case S_FMT_ULONG:
[1]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);
[34]438 if (isiz > 0 && sl_ok_adds(size, isiz))
[1]439 {
440 size += isiz;
441 clist[nn] = ftab[j].data_str;
442 ++nn;
443 }
444 else
445 *q = '%';
[13]446 goto endsrch;
[1]447 }
[13]448 break;
449
450 case S_FMT_LONG:
[1]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);
[34]458 if (isiz > 0 && sl_ok_adds(size, isiz))
[1]459 {
460 size += isiz;
461 clist[nn] = ftab[j].data_str;
462 ++nn;
463 }
464 else
465 *q = '%';
[13]466 goto endsrch;
[1]467 }
[13]468 break;
469
470 case S_FMT_TIME:
[1]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);
[34]490 if (isiz > 0 && sl_ok_adds(size, isiz))
[1]491 {
492 size += isiz;
493 clist[nn] = ftab[j].data_str;
494 ++nn;
495 }
496 else
497 *q = '%';
[13]498 goto endsrch;
[1]499 }
[13]500 break;
[1]501
[13]502 default:
503 /* do nothing */;
504 }
505
[1]506 }
[13]507 ++j;
[1]508 }
509
[13]510 endsrch:
511
512 p = q;
513
[1]514 /* -- not found -- */
515 if (i == 0)
516 {
517 *q = '%';
518 ++p;
519 }
[13]520
[1]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 */
[34]530 if (sl_ok_adds(size, 1))
531 size++;
[1]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]);
[34]541 outstr[size-1] = '\0';
542
[1]543 /* -- cleanup --
544 */
545 j = 0;
[13]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 }
[1]551 SH_FREE(fmt);
552
553 SL_RETURN(outstr, _("sh_util_formatted"));
554}
555
[93]556/* read a hexchar, return int value (0-15)
557 * can't inline (AIX)
[1]558 */
[12]559int sh_util_hexchar( const char c )
[1]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
[93]572char * 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
[1]589/* read a hexadecimal key, convert to binary
590 */
[12]591int sh_util_hextobinary (char * binary, const char * hex, int bytes)
[1]592{
593 int i = 0, j, k, l = 0;
[13]594 char c;
[1]595
[13]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
[1]608 SL_ENTER(_("sh_util_hextobinary"));
609
[34]610 if (bytes < 2)
611 SL_RETURN((-1), _("sh_util_hextobinary"));
612
613 while (i < (bytes-1))
[1]614 {
[13]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;
[1]620 }
621
622 SL_RETURN((0), _("sh_util_hextobinary"));
623}
624
625static 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 */
643static 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 };
[11]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 };
[1]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
[11]683 memcpy (K, zap, KEY_BLOCK);
[1]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
[34]691 if (sl_ok_adds(textlen, KEY_BLOCK))
692 {
693 inner = (char *) SH_ALLOC (textlen + KEY_BLOCK);
[1]694
[34]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 }
[1]704 }
[34]705 else
[1]706 {
[34]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"));
[1]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
742static 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
763static int sigtype = TYPE_HMAC;
764
[22]765int sh_util_sigtype (const char * c)
[1]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
781char * 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 */
799long 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 */
846void 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 */
901static 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 */
[11]920UINT32 taus_svec[6];
921
[1]922UINT32 taus_get (void *state1, void *state2, void *state3)
923{
924 UINT32 retval;
925 UINT32 * res;
[13]926 static UINT32 res_vec[6];
927 static int res_num = 0;
[1]928 register int i;
929
[13]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
[11]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);
[1]943
[11]944 res = sh_tiger_hash_uint32 ( (char *) &taus_svec[0],
[1]945 TIGER_DATA,
946 (unsigned long)(6 * sizeof(UINT32)));
947
[13]948 for (i = 1; i < 6; ++i)
[11]949 {
[13]950 res_vec[i] = res[i];
[11]951 }
[13]952 retval = taus_svec[0];
953 res_num = 1;
[1]954
[11]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;
[1]957
958 return retval;
959}
960
961/* interval [0,1)
962 */
963double 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 */
972static 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
995static 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
1008int 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[2*sizeof(UINT32)], 2*sizeof(UINT32));
1031 memcpy (&skey->rng2[0], &bufx[4*sizeof(UINT32)], 2*sizeof(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@*/
1064static unsigned char new_key[] = { 0xA7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xA7 };
1065/*@-charint@*/
1066static void copy_four (unsigned char * dest, UINT32 in);
1067
[20]1068int sh_util_set_newkey (const char * new_in)
[1]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;
[22]1076 char * outpath = NULL;
[1]1077 unsigned char * image = NULL;
1078 long s = 0;
1079 long ilen = 0;
1080 long ii, k = 0;
1081 UINT32 * h1;
[22]1082 char * new = NULL;
[1]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
[20]1092 if (new_in == NULL || new_in[0] == '\0')
[1]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 }
[20]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
[1]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"));
[22]1118 free(new);
[1]1119 _exit (EXIT_FAILURE);
1120 /*@notreached@*/
1121 return -1;
1122 }
1123 else
1124 path = &new[j];
[22]1125
1126 len = strlen(path) + 1 + 4;
[1]1127 /*@-usedef@*/
[22]1128 if (NULL == (outpath = malloc(len)))
[1]1129 goto bail_mem;
1130 /*@-usedef@*/
[22]1131 sl_snprintf (outpath, len, _("%s.out"), path);
[1]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);
[22]1138 free(new); free (outpath);
[1]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);
[22]1149 free(new); free (outpath);
[1]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);
[22]1190 free(new); free (outpath); free(image);
[1]1191 _exit (EXIT_SUCCESS);
1192 /*@notreached@*/
1193 return 0;
1194 }
1195 }
1196
1197 fprintf(stderr,
1198 _("ERROR: old key not found\n"));
[22]1199 free(new); free (outpath); free(image);
[1]1200 _exit (EXIT_FAILURE);
1201 /*@notreached@*/
1202 return -1;
1203
1204
1205 bail_mem:
1206 fprintf(stderr,
1207 _("ERROR: out of memory\n"));
[22]1208 if (new) free(new);
1209 if (outpath) free (outpath);
1210 if (image) free (image);
[1]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 */
1225void 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 */
[20]1290int sh_util_setserver (const char * dummy)
[1]1291{
1292 SL_ENTER(_("sh_util_setserver"));
1293
[20]1294 (void) dummy;
1295 sh.flag.isserver = GOOD;
[1]1296 SL_RETURN((0),_("sh_util_setserver"));
1297}
1298
1299
[20]1300int sh_util_setlooptime (const char * str)
[1]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)
[20]1317int sh_util_setchecksum (const char * str)
[1]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@*/
1371unsigned 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 */
1409int 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
1454static unsigned char sh_obscure_index[256];
[76]1455static int sh_obscure_no_check = S_FALSE;
[1]1456
[68]1457int sh_util_valid_utf8 (const unsigned char * str)
1458{
[76]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
[68]1464 size_t len = strlen((char *)str);
1465 size_t l = 0;
[76]1466 int typ = 0;
1467 unsigned char c = '\0';
1468 unsigned char c2[2] = { 0x00, 0x00 };
1469 unsigned char c3[3] = { 0x00, 0x00, 0x00 };
[68]1470
[76]1471
[68]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 */
[76]1477#define SH_VAL_BAD ((c == '"') || (c == '\t') || (c == '\b') || \
1478 (c == '\f') || (c == '\n') || \
[68]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 {
[76]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 }
[68]1497 }
1498 else if (SH_VAL_UTF8_2)
1499 {
[76]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 }
[68]1523 }
1524 else if (SH_VAL_UTF8_3)
1525 {
[76]1526 typ = sh_val_utf8_3;
1527 c3[0] = c;
[68]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. */
[76]1532 c3[1] = c;
[68]1533 ++l; if (l == len) return S_FALSE; c = str[l];
1534 if(!SH_VAL_UTF8_N) return S_FALSE;
[76]1535 c3[2] = c;
[68]1536 ++l; continue;
1537 }
1538 else if (SH_VAL_UTF8_4)
1539 {
[76]1540 typ = sh_val_utf8_4;
[68]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 }
[76]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 }
[68]1602}
1603
1604
[22]1605int sh_util_obscure_ok (const char * str)
[1]1606{
1607 unsigned long i;
[22]1608 char * endptr = NULL;
[1]1609
[29]1610 SL_ENTER(_("sh_util_obscure_ok"));
[1]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 }
[76]1618 sh_obscure_no_check = S_TRUE;
[29]1619 SL_RETURN(0, _("sh_util_obscure_ok"));
[1]1620 }
1621
[76]1622 sh_obscure_no_check = S_FALSE;
1623
[1]1624 for (i = 0; i < 255; ++i)
1625 {
1626 sh_obscure_index[i] = (unsigned char)0;
1627 }
1628
[22]1629 i = strtoul (str, &endptr, 0);
1630 if (i > 255)
1631 {
[29]1632 SL_RETURN(-1, _("sh_util_obscure_ok"));
[22]1633 }
1634 sh_obscure_index[i] = (unsigned char)1;
1635 if (*endptr == ',')
1636 ++endptr;
1637
[1]1638 while (*endptr != '\0')
1639 {
1640 i = strtoul (endptr, &endptr, 0);
1641 if (i > 255)
1642 {
[29]1643 SL_RETURN(-1, _("sh_util_obscure_ok"));
[1]1644 }
1645 sh_obscure_index[i] = (unsigned char)1;
1646 if (*endptr == ',')
1647 ++endptr;
1648 }
[29]1649 SL_RETURN(0, _("sh_util_obscure_ok"));
[1]1650}
1651
[68]1652static int sh_obscure_check_utf8 = S_FALSE;
1653
1654int 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));
[76]1659 if (sh_obscure_check_utf8 == S_TRUE)
1660 sh_obscure_no_check = S_FALSE;
[68]1661 SL_RETURN(i, _("sh_util_obscure_utf8"));
1662}
1663
1664
[1]1665int sh_util_obscurename (ShErrLevel level, char * name_orig, int flag)
1666{
[29]1667 unsigned char * name = (unsigned char *) name_orig;
[1]1668 char * safe;
1669 unsigned int i;
[76]1670 size_t len = 0;
[1]1671
1672 SL_ENTER(_("sh_util_obscurename"));
1673
1674 ASSERT_RET((name != NULL), _("name != NULL"), (0))
1675
[76]1676 if (sh_obscure_no_check == S_FALSE)
[68]1677 {
[76]1678 if (sh_obscure_check_utf8 != S_TRUE)
[68]1679 {
[76]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 }
[68]1705 }
[76]1706 else
[1]1707 {
[76]1708 if (S_FALSE == sh_util_valid_utf8(name))
[1]1709 {
[68]1710 goto err;
[1]1711 }
[76]1712 SL_RETURN((0),_("sh_util_obscurename"));
[1]1713 }
1714 }
[76]1715
[1]1716 SL_RETURN((0),_("sh_util_obscurename"));
[68]1717
1718 err:
[76]1719
[68]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"));
[1]1728}
[68]1729
[1]1730#endif
1731
1732/* returns freshly allocated memory, return value should be free'd
1733 */
[34]1734char * sh_util_dirname(const char * fullpath)
[1]1735{
1736 char * retval;
[34]1737 size_t len;
[93]1738 char * tmp;
[1]1739
[34]1740 SL_ENTER(_("sh_util_dirname"));
[1]1741
1742 ASSERT_RET ((fullpath != NULL), _("fullpath != NULL"), (NULL))
[93]1743 ASSERT_RET ((*fullpath == '/'), _("*fullpath == '/'"), (NULL))
[1]1744
[93]1745 retval = sh_util_strdup(fullpath);
[1]1746
[93]1747 tmp = retval;
1748 while (*tmp == '/') ++tmp;
[34]1749
[93]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';
[34]1771 --len;
[1]1772 }
1773
[93]1774 /* (4a) only leading slashes left, so return this
[1]1775 */
[93]1776 if (&(retval[len]) == tmp)
1777 {
1778 SL_RETURN(retval, _("sh_util_dirname"));
[34]1779 }
[1]1780
[93]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"));
[1]1788
1789}
1790
1791/* returns freshly allocated memory, return value should be free'd
1792 */
[34]1793char * sh_util_basename(const char * fullpath)
[1]1794{
[93]1795 char * retval = NULL;
1796 const char * tmp;
1797 char * tmp2;
1798 char * c;
1799 size_t len;
[1]1800
[34]1801 SL_ENTER(_("sh_util_basename"));
[1]1802
1803 ASSERT_RET ((fullpath != NULL), _("fullpath != NULL"), (NULL))
1804
[93]1805 tmp = fullpath; while (*tmp == '/') ++tmp;
1806 if (*tmp == '\0')
[34]1807 {
[93]1808 retval = sh_util_strdup(fullpath);
[34]1809 }
1810 else
1811 {
[93]1812 tmp2 = sh_util_strdup(tmp);
1813 len = sl_strlen (tmp2);
1814
1815 while (len > 1 && tmp2[len-1] == '/')
[34]1816 {
[93]1817 tmp2[len-1] = '\0';
1818 --len;
1819 }
1820
1821 c = strrchr(tmp2, '/');
1822 if (c)
1823 {
[34]1824 retval = sh_util_strdup(++c);
[93]1825 SH_FREE(tmp2);
[34]1826 }
1827 else
1828 {
[93]1829 retval = tmp2;
[34]1830 }
1831 }
[1]1832
[34]1833 SL_RETURN(retval, _("sh_util_basename"));
[1]1834}
1835
1836
1837/* returns freshly allocated memory, return value should be free'd
1838 */
1839char * 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];
[34]1846 size_t len;
[1]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
[34]1863 len = sl_strlen(name);
1864 p = name;
1865
[1]1866#ifdef SH_USE_XML
[34]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 }
[1]1877#else
[34]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 }
[1]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@*/
[22]1959 /* flawfinder: ignore */
[1]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
1977int 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
[76]1993char * sh_util_strconcat (const char * arg1, ...)
[1]1994{
[34]1995 size_t length, l2;
[1]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 {
[34]2010 l2 = sl_strlen (s);
2011 if (sl_ok_adds(length, l2))
2012 length += l2;
2013 else
2014 SL_RETURN(NULL, _("sh_util_strconcat"));
[1]2015 s = va_arg (vl, char * );
2016 }
2017 va_end (vl);
2018
[34]2019 if (sl_ok_adds(length, 2))
2020 strnew = SH_ALLOC( length + 2 );
2021 else
2022 SL_RETURN(NULL, _("sh_util_strconcat"));
2023
[1]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
2045int 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 {
[34]2070 errbuf = SH_ALLOC(BUFSIZ);
[1]2071 (void) regerror(status, &preg, errbuf, BUFSIZ);
[34]2072 errbuf[BUFSIZ-1] = '\0';
[1]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
Note: See TracBrowser for help on using the repository browser.