source: trunk/src/sh_utils.c@ 77

Last change on this file since 77 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
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
556/* can't inline (AIX)
557 */
[12]558int sh_util_hexchar( const char c )
[1]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 */
[12]573int sh_util_hextobinary (char * binary, const char * hex, int bytes)
[1]574{
575 int i = 0, j, k, l = 0;
[13]576 char c;
[1]577
[13]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
[1]590 SL_ENTER(_("sh_util_hextobinary"));
591
[34]592 if (bytes < 2)
593 SL_RETURN((-1), _("sh_util_hextobinary"));
594
595 while (i < (bytes-1))
[1]596 {
[13]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;
[1]602 }
603
604 SL_RETURN((0), _("sh_util_hextobinary"));
605}
606
607static 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 */
625static 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 };
[11]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 };
[1]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
[11]665 memcpy (K, zap, KEY_BLOCK);
[1]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
[34]673 if (sl_ok_adds(textlen, KEY_BLOCK))
674 {
675 inner = (char *) SH_ALLOC (textlen + KEY_BLOCK);
[1]676
[34]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 }
[1]686 }
[34]687 else
[1]688 {
[34]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"));
[1]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
724static 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
745static int sigtype = TYPE_HMAC;
746
[22]747int sh_util_sigtype (const char * c)
[1]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
763char * 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 */
781long 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 */
828void 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 */
883static 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 */
[11]902UINT32 taus_svec[6];
903
[1]904UINT32 taus_get (void *state1, void *state2, void *state3)
905{
906 UINT32 retval;
907 UINT32 * res;
[13]908 static UINT32 res_vec[6];
909 static int res_num = 0;
[1]910 register int i;
911
[13]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
[11]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);
[1]925
[11]926 res = sh_tiger_hash_uint32 ( (char *) &taus_svec[0],
[1]927 TIGER_DATA,
928 (unsigned long)(6 * sizeof(UINT32)));
929
[13]930 for (i = 1; i < 6; ++i)
[11]931 {
[13]932 res_vec[i] = res[i];
[11]933 }
[13]934 retval = taus_svec[0];
935 res_num = 1;
[1]936
[11]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;
[1]939
940 return retval;
941}
942
943/* interval [0,1)
944 */
945double 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 */
954static 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
977static 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
990int 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[2*sizeof(UINT32)], 2*sizeof(UINT32));
1013 memcpy (&skey->rng2[0], &bufx[4*sizeof(UINT32)], 2*sizeof(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@*/
1046static unsigned char new_key[] = { 0xA7,0xC3,0x12,0xAA,0xAA,0x12,0xC3,0xA7 };
1047/*@-charint@*/
1048static void copy_four (unsigned char * dest, UINT32 in);
1049
[20]1050int sh_util_set_newkey (const char * new_in)
[1]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;
[22]1058 char * outpath = NULL;
[1]1059 unsigned char * image = NULL;
1060 long s = 0;
1061 long ilen = 0;
1062 long ii, k = 0;
1063 UINT32 * h1;
[22]1064 char * new = NULL;
[1]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
[20]1074 if (new_in == NULL || new_in[0] == '\0')
[1]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 }
[20]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
[1]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"));
[22]1100 free(new);
[1]1101 _exit (EXIT_FAILURE);
1102 /*@notreached@*/
1103 return -1;
1104 }
1105 else
1106 path = &new[j];
[22]1107
1108 len = strlen(path) + 1 + 4;
[1]1109 /*@-usedef@*/
[22]1110 if (NULL == (outpath = malloc(len)))
[1]1111 goto bail_mem;
1112 /*@-usedef@*/
[22]1113 sl_snprintf (outpath, len, _("%s.out"), path);
[1]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);
[22]1120 free(new); free (outpath);
[1]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);
[22]1131 free(new); free (outpath);
[1]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);
[22]1172 free(new); free (outpath); free(image);
[1]1173 _exit (EXIT_SUCCESS);
1174 /*@notreached@*/
1175 return 0;
1176 }
1177 }
1178
1179 fprintf(stderr,
1180 _("ERROR: old key not found\n"));
[22]1181 free(new); free (outpath); free(image);
[1]1182 _exit (EXIT_FAILURE);
1183 /*@notreached@*/
1184 return -1;
1185
1186
1187 bail_mem:
1188 fprintf(stderr,
1189 _("ERROR: out of memory\n"));
[22]1190 if (new) free(new);
1191 if (outpath) free (outpath);
1192 if (image) free (image);
[1]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 */
1207void 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 */
[20]1272int sh_util_setserver (const char * dummy)
[1]1273{
1274 SL_ENTER(_("sh_util_setserver"));
1275
[20]1276 (void) dummy;
1277 sh.flag.isserver = GOOD;
[1]1278 SL_RETURN((0),_("sh_util_setserver"));
1279}
1280
1281
[20]1282int sh_util_setlooptime (const char * str)
[1]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)
[20]1299int sh_util_setchecksum (const char * str)
[1]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@*/
1353unsigned 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 */
1391int 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
1436static unsigned char sh_obscure_index[256];
[76]1437static int sh_obscure_no_check = S_FALSE;
[1]1438
[68]1439int sh_util_valid_utf8 (const unsigned char * str)
1440{
[76]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
[68]1446 size_t len = strlen((char *)str);
1447 size_t l = 0;
[76]1448 int typ = 0;
1449 unsigned char c = '\0';
1450 unsigned char c2[2] = { 0x00, 0x00 };
1451 unsigned char c3[3] = { 0x00, 0x00, 0x00 };
[68]1452
[76]1453
[68]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 */
[76]1459#define SH_VAL_BAD ((c == '"') || (c == '\t') || (c == '\b') || \
1460 (c == '\f') || (c == '\n') || \
[68]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 {
[76]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 }
[68]1479 }
1480 else if (SH_VAL_UTF8_2)
1481 {
[76]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 }
[68]1505 }
1506 else if (SH_VAL_UTF8_3)
1507 {
[76]1508 typ = sh_val_utf8_3;
1509 c3[0] = c;
[68]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. */
[76]1514 c3[1] = c;
[68]1515 ++l; if (l == len) return S_FALSE; c = str[l];
1516 if(!SH_VAL_UTF8_N) return S_FALSE;
[76]1517 c3[2] = c;
[68]1518 ++l; continue;
1519 }
1520 else if (SH_VAL_UTF8_4)
1521 {
[76]1522 typ = sh_val_utf8_4;
[68]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 }
[76]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 }
[68]1584}
1585
1586
[22]1587int sh_util_obscure_ok (const char * str)
[1]1588{
1589 unsigned long i;
[22]1590 char * endptr = NULL;
[1]1591
[29]1592 SL_ENTER(_("sh_util_obscure_ok"));
[1]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 }
[76]1600 sh_obscure_no_check = S_TRUE;
[29]1601 SL_RETURN(0, _("sh_util_obscure_ok"));
[1]1602 }
1603
[76]1604 sh_obscure_no_check = S_FALSE;
1605
[1]1606 for (i = 0; i < 255; ++i)
1607 {
1608 sh_obscure_index[i] = (unsigned char)0;
1609 }
1610
[22]1611 i = strtoul (str, &endptr, 0);
1612 if (i > 255)
1613 {
[29]1614 SL_RETURN(-1, _("sh_util_obscure_ok"));
[22]1615 }
1616 sh_obscure_index[i] = (unsigned char)1;
1617 if (*endptr == ',')
1618 ++endptr;
1619
[1]1620 while (*endptr != '\0')
1621 {
1622 i = strtoul (endptr, &endptr, 0);
1623 if (i > 255)
1624 {
[29]1625 SL_RETURN(-1, _("sh_util_obscure_ok"));
[1]1626 }
1627 sh_obscure_index[i] = (unsigned char)1;
1628 if (*endptr == ',')
1629 ++endptr;
1630 }
[29]1631 SL_RETURN(0, _("sh_util_obscure_ok"));
[1]1632}
1633
[68]1634static int sh_obscure_check_utf8 = S_FALSE;
1635
1636int 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));
[76]1641 if (sh_obscure_check_utf8 == S_TRUE)
1642 sh_obscure_no_check = S_FALSE;
[68]1643 SL_RETURN(i, _("sh_util_obscure_utf8"));
1644}
1645
1646
[1]1647int sh_util_obscurename (ShErrLevel level, char * name_orig, int flag)
1648{
[29]1649 unsigned char * name = (unsigned char *) name_orig;
[1]1650 char * safe;
1651 unsigned int i;
[76]1652 size_t len = 0;
[1]1653
1654 SL_ENTER(_("sh_util_obscurename"));
1655
1656 ASSERT_RET((name != NULL), _("name != NULL"), (0))
1657
[76]1658 if (sh_obscure_no_check == S_FALSE)
[68]1659 {
[76]1660 if (sh_obscure_check_utf8 != S_TRUE)
[68]1661 {
[76]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 }
[68]1687 }
[76]1688 else
[1]1689 {
[76]1690 if (S_FALSE == sh_util_valid_utf8(name))
[1]1691 {
[68]1692 goto err;
[1]1693 }
[76]1694 SL_RETURN((0),_("sh_util_obscurename"));
[1]1695 }
1696 }
[76]1697
[1]1698 SL_RETURN((0),_("sh_util_obscurename"));
[68]1699
1700 err:
[76]1701
[68]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"));
[1]1710}
[68]1711
[1]1712#endif
1713
1714/* returns freshly allocated memory, return value should be free'd
1715 */
[34]1716char * sh_util_dirname(const char * fullpath)
[1]1717{
1718 char * retval;
[34]1719 size_t len;
[1]1720
[34]1721 SL_ENTER(_("sh_util_dirname"));
[1]1722
1723 ASSERT_RET ((fullpath != NULL), _("fullpath != NULL"), (NULL))
1724
[34]1725 len = sl_strlen (fullpath); /* fullpath[i] is terminating '\0' */
[1]1726
[34]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 }
[1]1737 }
1738
[34]1739 /* -- Not an absolute path. --
[1]1740 */
[34]1741 if ((len == 0) && (fullpath[len] != '/'))
1742 {
1743 SL_RETURN(NULL, _("sh_util_dirname"));
1744 }
[1]1745
[34]1746 retval = SH_ALLOC(len + 1);
1747 (void) sl_strlcpy (retval, fullpath, len+1);
[1]1748
[34]1749 SL_RETURN(retval, _("sh_util_dirname"));
[1]1750}
1751
1752/* returns freshly allocated memory, return value should be free'd
1753 */
[34]1754char * sh_util_basename(const char * fullpath)
[1]1755{
[34]1756 char * retval = NULL;
1757 char * tmp;
[1]1758 char * c;
[34]1759 size_t len;
[1]1760
[34]1761 SL_ENTER(_("sh_util_basename"));
[1]1762
1763 ASSERT_RET ((fullpath != NULL), _("fullpath != NULL"), (NULL))
1764
1765 c = strrchr(fullpath, '/');
[34]1766 len = sl_strlen (c);
[1]1767
[34]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 }
[1]1790
[34]1791 SL_RETURN(retval, _("sh_util_basename"));
[1]1792}
1793
1794
1795/* returns freshly allocated memory, return value should be free'd
1796 */
1797char * 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];
[34]1804 size_t len;
[1]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
[34]1821 len = sl_strlen(name);
1822 p = name;
1823
[1]1824#ifdef SH_USE_XML
[34]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 }
[1]1835#else
[34]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 }
[1]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@*/
[22]1917 /* flawfinder: ignore */
[1]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
1935int 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
[76]1951char * sh_util_strconcat (const char * arg1, ...)
[1]1952{
[34]1953 size_t length, l2;
[1]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 {
[34]1968 l2 = sl_strlen (s);
1969 if (sl_ok_adds(length, l2))
1970 length += l2;
1971 else
1972 SL_RETURN(NULL, _("sh_util_strconcat"));
[1]1973 s = va_arg (vl, char * );
1974 }
1975 va_end (vl);
1976
[34]1977 if (sl_ok_adds(length, 2))
1978 strnew = SH_ALLOC( length + 2 );
1979 else
1980 SL_RETURN(NULL, _("sh_util_strconcat"));
1981
[1]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
2003int 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 {
[34]2028 errbuf = SH_ALLOC(BUFSIZ);
[1]2029 (void) regerror(status, &preg, errbuf, BUFSIZ);
[34]2030 errbuf[BUFSIZ-1] = '\0';
[1]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
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