source: trunk/src/sh_tools.c@ 167

Last change on this file since 167 was 161, checked in by katerina, 17 years ago

Fix for ticket #88 (parallel build fails). Also fixed a few typos.
File size: 40.8 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 <stdio.h>
24#include <stdlib.h>
25#include <string.h>
26#include <ctype.h>
27
28/* Must be early on FreeBSD
29 */
30#include <sys/types.h>
31
32#ifdef HAVE_MEMORY_H
33#include <memory.h>
34#endif
35
36#ifdef HAVE_SYS_SELECT_H
37#include <sys/select.h>
38#endif
39
40#ifdef HAVE_UNISTD_H
41#include <errno.h>
42#include <signal.h>
43#include <setjmp.h>
44#include <pwd.h>
45#include <grp.h>
46#include <sys/stat.h>
47#include <sys/resource.h>
48#include <fcntl.h>
49#include <sys/wait.h>
50#include <unistd.h>
51#endif
52
53#include <sys/socket.h>
54
55#ifdef HOST_IS_HPUX
56#define _XOPEN_SOURCE_EXTENDED
57#endif
58#include <netinet/in.h>
59#include <arpa/inet.h>
60#include <netdb.h>
61
62#ifndef FD_SET
63#define NFDBITS 32
64#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
65#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
66#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
67#endif /* !FD_SET */
68#ifndef FD_SETSIZE
69#define FD_SETSIZE 32
70#endif
71#ifndef FD_ZERO
72#define FD_ZERO(p) memset((char *)(p), '\0', sizeof(*(p)))
73#endif
74
75
76#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
77#include <sys/mman.h>
78#endif
79
[11]80#define SH_REAL_SET
81
[1]82#include "samhain.h"
83#include "sh_mem.h"
84#include "sh_error.h"
85#include "sh_tools.h"
86#include "sh_utils.h"
87#include "sh_tiger.h"
88#define SH_NEED_GETHOSTBYXXX
89#include "sh_static.h"
[137]90#include "sh_pthread.h"
[1]91
92#undef FIL__
93#define FIL__ _("sh_tools.c")
94
95#ifdef SH_ENCRYPT
96#include "rijndael-api-fst.h"
[132]97char * errorExplain (int err_num, char * buffer, size_t len)
[1]98{
[132]99 char * p;
100
[1]101 if (err_num == BAD_KEY_DIR)
[132]102 p = (_("Key direction is invalid"));
[1]103 else if (err_num == BAD_KEY_MAT)
[132]104 p = (_("Key material not of correct length"));
[1]105 else if (err_num == BAD_KEY_INSTANCE)
[132]106 p = (_("Key passed is not valid"));
[1]107 else if (err_num == BAD_CIPHER_MODE)
[132]108 p = (_("Params struct passed to cipherInit invalid"));
[1]109 else if (err_num == BAD_CIPHER_STATE)
[132]110 p = (_("Cipher in wrong state"));
[1]111 else if (err_num == BAD_BLOCK_LENGTH)
[132]112 p = (_("Bad block length"));
[1]113 else if (err_num == BAD_CIPHER_INSTANCE)
[132]114 p = (_("Bad cipher instance"));
[1]115 else if (err_num == BAD_DATA)
[132]116 p = (_("Data contents are invalid"));
[1]117 else
[132]118 p = (_("Unknown error"));
119 sl_strlcpy (buffer, p, len);
120 return buffer;
[1]121}
122
123#endif
124
125/* --- recode all \blah escapes to '=XX' format, and also code all
126 * remaining unprintable chars ---
127 */
[12]128#define SH_PUT_4(p, a, b, c) (p)[0] = (a); (p)[1] = (b); (p)[2] = (c);
129
[1]130char * sh_tools_safe_name (const char * instr, int flag)
131{
[18]132 unsigned char c, d;
[1]133 const char * p;
134 char tmp[4];
135 char * outstr;
[34]136 size_t len = 1;
[1]137 int i = 0;
138 unsigned char val_octal = '\0';
[18]139 static char ctable[16] = { '0', '1', '2', '3', '4', '5', '6', '7',
140 '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
[1]141
142 SL_ENTER(_("sh_tools_safe_name"));
143
144 if (instr)
[34]145 {
146 len = strlen(instr);
147 if (sl_ok_muls (3, len) && sl_ok_adds ((3*len), 4))
148 {
149 len = (3 * len) + 4;
150 p = instr;
151 }
152 else
153 {
154 len = 1;
155 p = NULL;
156 }
157 }
158 else
159 {
160 p = NULL;
161 }
[1]162
163 outstr = SH_ALLOC(len);
164
165 outstr[0] = '\0';
166 tmp[3] = '\0';
167
[11]168#if !defined(SH_USE_XML)
169 (void) flag; /* fix compiler warning */
170#endif
171
172 if (!p)
173 goto end;
174
175 while (*p)
[1]176 {
177 c = *p;
178
179 if (*p == '\n')
180 {
181 outstr[i] = ' '; ++i; ++p;
182 continue;
183 }
184
185#ifdef SH_USE_XML
[11]186 if (flag == 1)
187 {
188 if ((*p) == '"')
189 {
[12]190 SH_PUT_4(&outstr[i], '=', '2', '2');
191 i+=3; ++p;
[11]192 continue;
193 }
194 else if ((*p) == '&')
195 {
[12]196 SH_PUT_4(&outstr[i], '=', '2', '6');
197 i+=3; ++p;
[11]198 continue;
199 }
200 else if ((*p) == '<')
201 { /* left angle */
[12]202 SH_PUT_4(&outstr[i], '=', '3', 'c');
203 i+=3; ++p;
[11]204 continue;
205 }
206 else if ((*p) == '>')
207 { /* right angle */
[12]208 SH_PUT_4(&outstr[i], '=', '3', 'e');
209 i+=3; ++p;
[11]210 continue;
211 }
[1]212 }
213#endif
214
[12]215 if ( (*p) != '\\' && (*p) != '&' && (*p) != '=' && (*p) != '\'')
[1]216 {
[11]217 outstr[i] = *p; ++i;
218 ++p;
219
[81]220 if (c < 32 || c > 126)
[1]221 {
[11]222 --i;
[18]223 d = c % 16; c = c / 16;
224 outstr[i] = '='; ++i;
225 outstr[i] = ctable[c]; ++i;
226 outstr[i] = ctable[d]; ++i;
[1]227 }
[11]228
[1]229 continue;
230 }
231 else if ((*p) == '\'')
232 {
[12]233 SH_PUT_4(&outstr[i], '=', '2', '7');
234 i+=3; ++p;
[1]235 }
236 else if (*p == '=')
237 {
238 if (p[1] != '"' && p[1] != '<')
239 {
[12]240 SH_PUT_4(&outstr[i], '=', '3', 'd');
241 i+=3; ++p;
[1]242 }
243 else
244 { outstr[i] = *p; ++i; ++p; }
245 }
246 else if (*p == '\\')
247 {
248 ++p;
249 if (!p)
250 break;
251 if (!(*p))
252 break;
253
254 c = *p;
255
256 switch (*p) {
257 case '\\':
[12]258 SH_PUT_4(&outstr[i], '=', '5', 'c');
259 i+=3; ++p;
[1]260 break;
261 case 'n':
[12]262 SH_PUT_4(&outstr[i], '=', '0', 'a');
[1]263 i+=3; ++p;
264 break;
265 case 'b':
[12]266 SH_PUT_4(&outstr[i], '=', '0', '8');
[1]267 i+=3; ++p;
268 break;
269 case 'r':
[12]270 SH_PUT_4(&outstr[i], '=', '0', 'd');
[1]271 i+=3; ++p;
272 break;
273 case 't':
[12]274 SH_PUT_4(&outstr[i], '=', '0', '9');
[1]275 i+=3; ++p;
276 break;
277 case 'v':
[12]278 SH_PUT_4(&outstr[i], '=', '0', 'b');
[1]279 i+=3; ++p;
280 break;
281 case 'f':
[12]282 SH_PUT_4(&outstr[i], '=', '0', 'c');
[1]283 i+=3; ++p;
284 break;
285 case '\'':
[12]286 SH_PUT_4(&outstr[i], '=', '2', '7');
[1]287 i+=3; ++p;
288 break;
[12]289 case '"': /* also encode quoted '"' */
290 SH_PUT_4(&outstr[i], '=', '2', '2');
[1]291 i+=3; ++p;
292 break;
293 case ' ':
[12]294 SH_PUT_4(&outstr[i], '=', '2', '0');
[1]295 i+=3; ++p;
296 break;
297 default:
[18]298 if (strlen(p) < 3) /* certainly not an octal number, skip */
[1]299 {
300 p += strlen(p);
301 }
302 else
303 {
304 tmp[0] = p[0]; tmp[1] = p[1]; tmp[2] = p[2];
305 val_octal = (unsigned char) strtoul(tmp, (char **)NULL, 8);
306 if (val_octal != '\0') {
307 c = val_octal;
[18]308 d = c % 16; c = c / 16;
309 outstr[i] = '='; ++i;
310 outstr[i] = ctable[c]; ++i;
311 outstr[i] = ctable[d]; ++i;
[1]312 }
313 p += 3;
314 }
315 }
316 }
[11]317 else if (*p == '&')
[1]318 {
319 ++p;
[18]320 if (!p || !(*p))
321 {
322 outstr[i] = '&'; ++i;
323 break;
324 }
[1]325
326 if (p[0] == 'a' && p[1] == 'm' && p[2] == 'p' && p[3] == ';')
327 {
[12]328 SH_PUT_4(&outstr[i], '=', '2', '6');
[1]329 i+=3; p += 4;
330 }
331 else if (p[0] == 'q' && p[1] == 'u' && p[2] == 'o' && p[3] == 't' &&
332 p[4] == ';')
333 {
[12]334 SH_PUT_4(&outstr[i], '=', '2', '2');
[1]335 i+=3; p += 5;
336 }
337 else if (p[0] == 'l' && p[1] == 't' && p[2] == ';')
338 {
[12]339 SH_PUT_4(&outstr[i], '=', '3', 'c');
[1]340 i+=3; p += 3;
341 }
342 else if (p[0] == 'g' && p[1] == 't' && p[2] == ';')
343 {
[12]344 SH_PUT_4(&outstr[i], '=', '3', 'e');
[1]345 i+=3; p += 3;
346 }
347 else /* conserve the '&' */
348 {
349 outstr[i] = '&'; ++i;
350 }
[11]351 }
352 else
353 {
354 outstr[i] = *p; ++i;
355 ++p;
356 }
[1]357 } /* while (p && *p) */
[11]358
359 end:
[1]360
361 outstr[i] = '\0';
362 SL_RETURN( outstr, _("sh_tools_safe_name"));
363}
364
365
366/* extern int h_errno; */
367
[132]368char * sh_tools_errmessage (int tellme, char * errbuf, size_t len)
[1]369{
[132]370 char * p = NULL;
[1]371#ifdef HOST_NOT_FOUND
372 if (tellme == HOST_NOT_FOUND)
[132]373 p = _("The specified host is unknown: ");
[1]374#endif
375#ifdef NO_ADDRESS
376 if (tellme == NO_ADDRESS)
[132]377 p = _("The requested name is valid but does not have an IP address: ");
[1]378#endif
379#ifdef NO_RECOVERY
380 if (tellme == NO_RECOVERY)
[132]381 p = _("A non-recoverable name server error occurred: ");
[1]382#endif
383#ifdef TRY_AGAIN
384 if (tellme == TRY_AGAIN)
[132]385 p = _("A temporary error occurred on an authoritative name server. The specified host is unknown: ");
[1]386#endif
[132]387 if (!p) p = _("Unknown error");
388 sl_strlcpy(errbuf, p, len);
389 return errbuf;
[1]390}
391
392int is_numeric (const char * address)
393{
394 int j;
395 int len = sl_strlen(address);
396
397 for (j = 0; j < len; ++j)
398 if ( (address[j] < '0' || address[j] > '9') && address[j] != '.')
399 return (1 == 0);
400 return (1 == 1);
401}
402
403#if defined (SH_WITH_SERVER)
404
405int get_open_max ()
406{
407 int value;
408
409#ifdef _SC_OPEN_MAX
410 value = sysconf (_SC_OPEN_MAX);
411#else
412#ifdef OPEN_MAX
413 value = OPEN_MAX;
414#else
415 value = _POSIX_OPEN_MAX;
416#endif
417#endif
418
419 if (value < 0)
420 value = 8; /* POSIX lower limit */
421
422 if (value > 4096)
423 value = 4096;
424
425 return value;
426}
427
428#endif
429
430typedef struct _sin_cache {
431 char * address;
432 struct sockaddr_in sin;
433 struct _sin_cache * next;
434} sin_cache;
435
436static sin_cache * conn_cache = NULL;
437static int cached_addr = 0;
438
439void delete_cache()
440{
441 sin_cache * check_cache = conn_cache;
442 sin_cache * old_entry = conn_cache;
443
444 SL_ENTER(_("delete_cache"));
445
446 while (check_cache != NULL)
447 {
448 old_entry = check_cache;
449 check_cache = check_cache->next;
450 SH_FREE(old_entry->address);
451 SH_FREE(old_entry);
452 }
453
454 cached_addr = 0;
455
456 conn_cache = NULL;
457 SL_RET0(_("delete_cache"));
458}
459
460int DoReverseLookup = S_TRUE;
461
[22]462int set_reverse_lookup (const char * c)
[1]463{
464 return sh_util_flagval(c, &DoReverseLookup);
465}
466
467int connect_port (char * address, int port,
468 char * ecall, int * errnum, char * errmsg, int errsiz)
469{
470 struct in_addr haddr; /* host address from numeric */
471 /* host details returned by the DNS */
472 struct hostent *host_entry = NULL;
473 struct sockaddr_in sinr; /* socket to the remote host */
474
475 char * host_name;
476
477 int fd = (-1);
478 int status;
479 int fail = 0;
480 int cached = 0;
481
482 int retval;
[132]483 char errbuf[SH_ERRBUF_SIZE];
[1]484
485 sin_cache * check_cache = conn_cache;
486
487 SL_ENTER(_("connect_port"));
488
489 /* paranoia -- should not happen
490 */
491 if (cached_addr > 128)
492 delete_cache();
493
494 if (check_cache != NULL)
495 {
496 while (check_cache && check_cache->address)
497 {
498 if ( 0 == sl_strncmp(check_cache->address,
499 address, sl_strlen(address)))
500 {
501 memcpy (&sinr, &(check_cache->sin), sizeof(struct sockaddr_in));
502 sinr.sin_family = AF_INET;
503 sinr.sin_port = htons (port);
504 cached = 1;
505 break;
506 }
507 if (check_cache->next)
508 check_cache = check_cache->next;
509 else
510 check_cache = NULL;
511 }
512 }
513
514 /* only use gethostbyname() if neccessary
515 */
516 if (cached == 0)
517 {
518#ifdef HAVE_INET_ATON
519 if (0 == inet_aton(address, &haddr))
520#else
521 if ((unsigned long)-1 == (haddr.s_addr = inet_addr(address)))
522#endif
523 {
[143]524 host_name = NULL;
525
[134]526 SH_MUTEX_LOCK(mutex_resolv);
527
[1]528 host_entry = sh_gethostbyname(address);
529
530 if (host_entry == NULL || host_entry->h_addr == NULL)
531 {
532 sl_strlcpy(ecall, _("gethostbyname"), SH_MINIBUF);
533#ifndef NO_H_ERRNO
534 *errnum = h_errno;
535#else
536 *errnum = 666;
537#endif
[132]538 (void) sh_tools_errmessage (*errnum, errmsg, errsiz);
[1]539 sl_strlcat(errmsg, address, errsiz);
540 fail = (-1);
541 }
542 else
543 {
544 sinr.sin_family = AF_INET;
545 sinr.sin_port = htons (port);
546 sinr.sin_addr = *(struct in_addr *) host_entry->h_addr;
547
548
549 /* reverse DNS lookup
550 */
551 if (DoReverseLookup == S_TRUE)
552 {
553 if (host_entry->h_name == NULL)
554 {
555 host_name = SH_ALLOC(1);
556 host_name[0] = '\0';
557 }
558 else
559 {
[34]560 host_name = sh_util_strdup(host_entry->h_name);
[1]561 }
562
563 host_entry = sh_gethostbyaddr ((char *) &sinr.sin_addr,
564 sizeof(struct in_addr),
565 AF_INET);
566 if (host_entry == NULL || host_entry->h_name == NULL)
567 {
568 sl_strlcpy(ecall, _("gethostbyaddr"), SH_MINIBUF);
569#ifndef NO_H_ERRNO
570 *errnum = h_errno;
571#else
572 *errnum = 666;
573#endif
[132]574 (void) sh_tools_errmessage (*errnum, errmsg, errsiz);
[1]575 sl_strlcat(errmsg,
576 inet_ntoa (*(struct in_addr *) &(sinr.sin_addr)),
577 errsiz);
578 fail = (-1);
579 }
580 else
581 {
582 *errnum = 0;
583 if (sl_strlen(host_entry->h_name) == 0 ||
584 (*errnum = sl_strcmp(host_name,host_entry->h_name)) != 0)
585 {
586 if (*errnum)
587 sl_strlcpy(ecall, _("strcmp"), SH_MINIBUF);
588 else
589 sl_strlcpy(ecall, _("strlen"), SH_MINIBUF);
[161]590 sl_strlcpy(errmsg, _("Reverse lookup failed: "),
[1]591 errsiz);
592 sl_strlcat(errmsg, address, errsiz);
593 sl_strlcat(errmsg, _(" vs "), errsiz);
594 sl_strlcat(errmsg,
595 inet_ntoa (*(struct in_addr *) &(sinr.sin_addr)),
596 errsiz);
597 fail = -1;
598 }
599 }
600 }
601 }
[134]602 SH_MUTEX_UNLOCK(mutex_resolv);
[143]603 if (host_name) SH_FREE(host_name);
[1]604 }
605
606 else /* address was numeric */
607 {
608 sinr.sin_family = AF_INET;
609 sinr.sin_port = htons (port);
610 sinr.sin_addr = haddr;
611 }
612
613
614 if (fail != -1)
615 {
616 /* put it into the cache
617 */
618 check_cache = SH_ALLOC(sizeof(sin_cache));
619 check_cache->address = SH_ALLOC(sl_strlen(address) + 1);
620 sl_strlcpy (check_cache->address, address, sl_strlen(address) + 1);
621 memcpy(&(check_cache->sin), &sinr, sizeof(struct sockaddr_in));
622 ++cached_addr;
623
624 if (conn_cache)
625 {
626 if (conn_cache->next)
627 check_cache->next = conn_cache->next;
628 else
629 check_cache->next = NULL;
630 conn_cache->next = check_cache;
631 }
632 else
633 {
634 check_cache->next = NULL;
635 conn_cache = check_cache;
636 }
637 }
638 }
639
640
641 if (fail != (-1))
642 {
643 fd = socket(AF_INET, SOCK_STREAM, 0);
644 if (fd < 0) {
645 fail = (-1);
646 status = errno;
647 sl_strlcpy(ecall, _("socket"), SH_MINIBUF);
648 *errnum = status;
[132]649 sl_strlcpy(errmsg, sh_error_message (status, errbuf, sizeof(errbuf)), errsiz);
[1]650 sl_strlcat(errmsg, _(", address "), errsiz);
651 sl_strlcat(errmsg, address, errsiz);
652 }
653 }
654
655 if (fail != (-1)) {
656
657 if ( retry_connect(FIL__, __LINE__, fd,
658 (struct sockaddr *) &sinr, sizeof(sinr)) < 0)
659 {
660 status = errno;
661 sl_strlcpy(ecall, _("connect"), SH_MINIBUF);
662 *errnum = status;
[132]663 sl_strlcpy(errmsg, sh_error_message (status, errbuf, sizeof(errbuf)), errsiz);
[1]664 sl_strlcat(errmsg, _(", address "), errsiz);
665 sl_strlcat(errmsg, address, errsiz);
666 close(fd);
667 fail = (-1);
668 }
669 }
670
671 retval = (fail < 0) ? (-1) : fd;
672 SL_RETURN(retval, _("connect_port"));
673}
674
675int connect_port_2 (char * address1, char * address2, int port,
676 char * ecall, int * errnum, char * errmsg, int errsiz)
677{
678 int retval = (-1);
679
680 SL_ENTER(_("connect_port_2"));
681
682 errmsg[0] = '\0';
683 *errnum = 0;
684
685 if (address1 != NULL && address1[0] != '\0')
686 retval = connect_port (address1, port,
687 ecall, errnum,
688 errmsg, errsiz);
689
690 if (retval < 0 && address2 != NULL && address2[0] != '\0')
691 {
692 /* can't use sh_error_handle here, as this would cause an infinite
693 * loop if called from sh_unix_time
694 */
695 TPT(( 0, FIL__, __LINE__, _("msg=<Using alternative server %s.>\n"),
696 address2));
697 retval = connect_port (address2, port,
698 ecall, errnum,
699 errmsg, errsiz);
700 }
701
702 if ((retval < 0) &&
703 (address1 == NULL || address1[0] == '\0') &&
704 (address1 == NULL || address1[0] == '\0'))
705 {
706 sl_strlcpy(ecall, _("connect_port_2"), SH_MINIBUF);
707 sl_strlcpy(errmsg, _("No server address known"), errsiz);
708 }
709 SL_RETURN(retval, _("connect_port_2"));
710 /* return retval; */
711}
712
[27]713#if defined(HAVE_NTIME) || defined(SH_WITH_CLIENT) || defined(SH_WITH_SERVER)
[1]714static
715int sh_write_select(int type, int sockfd,
716 char *buf, int nbytes,
717 int * w_error, int timeout)
718{
719 int countbytes, count;
720 fd_set fds;
721 struct timeval tv;
722 int select_now;
723 int num_sel;
724
725 struct sigaction new_act;
726 struct sigaction old_act;
[137]727#if defined(WITH_TPT)
[132]728 char errbuf[SH_ERRBUF_SIZE];
[137]729#endif
[1]730
731 SL_ENTER(_("sh_write_select"));
732
733 /* ignore SIGPIPE (instead get EPIPE if connection is closed)
734 */
735 new_act.sa_handler = SIG_IGN;
[22]736 sigemptyset( &new_act.sa_mask ); /* set an empty mask */
737 new_act.sa_flags = 0; /* init sa_flags */
[1]738 sigaction (SIGPIPE, &new_act, &old_act);
739
740 FD_ZERO(&fds);
741 FD_SET(sockfd, &fds);
742
743 countbytes = 0;
744 tv.tv_sec = 1;
745 tv.tv_usec = 0;
746 select_now = 0;
747
748 *w_error = 0;
749
750 while ( countbytes < nbytes ) {
751
752 FD_ZERO(&fds);
753 FD_SET(sockfd, &fds);
754
755 if (type == SH_DO_WRITE)
756 {
757 if ( (num_sel = select (sockfd+1, NULL, &fds, NULL, &tv)) == -1)
758 {
759 if (sig_raised == 1)
760 {
761 sig_raised = 2;
762 continue;
763 }
764 if ( errno == EINTR) /* try again */
765 continue;
766 *w_error = errno;
767 TPT(( 0, FIL__, __LINE__, _("msg=<select: %s>\n"),
[132]768 sh_error_message(*w_error, errbuf, sizeof(errbuf))));
[1]769 sigaction (SIGPIPE, &old_act, NULL);
770 SL_RETURN( countbytes, _("sh_write_select"));
771 }
772 }
773 else
774 {
775 if ( (num_sel = select (sockfd+1, &fds, NULL, NULL, &tv)) == -1)
776 {
777 if (sig_raised == 1)
778 {
779 sig_raised = 2;
780 continue;
781 }
782 if ( errno == EINTR ) /* try again */
783 continue;
784 *w_error = errno;
785 TPT(( 0, FIL__, __LINE__, _("msg=<select: %s>\n"),
[132]786 sh_error_message(*w_error, errbuf, sizeof(errbuf))));
[1]787 sigaction (SIGPIPE, &old_act, NULL);
788 SL_RETURN( countbytes, _("sh_write_select"));
789 }
790 }
791
792 /* on Linux, timeout is modified to reflect the amount of
793 * time not slept
794 */
795 tv.tv_sec = 1;
796 tv.tv_usec = 0;
797
798
799 /* let's not hang on forever
800 */
801 if (num_sel == 0)
802 {
803 ++select_now; /* timeout */
804 if ( select_now > timeout ) /* 5 minutes */
805 {
806#ifdef ETIMEDOUT
807 *w_error = ETIMEDOUT;
808#else
809 *w_error = 0;
810#endif
811 sigaction (SIGPIPE, &old_act, NULL);
812 TPT(( 0, FIL__, __LINE__, _("msg=<Timeout>\n")));
813 SL_RETURN( countbytes, _("sh_write_select"));
814 }
815 }
816
817 if ( FD_ISSET (sockfd, &fds) )
818 {
819 if (type == SH_DO_WRITE)
820 count = write (sockfd, buf, nbytes-countbytes);
821 else
822 count = read (sockfd, buf, nbytes-countbytes);
823
824 if (count > 0)
825 {
826 countbytes += count;
827 buf += count; /* move buffer pointer forward */
828 if (countbytes < nbytes) FD_SET( sockfd, &fds );
829 }
830 else if (count < 0 && errno == EINTR)
831 {
832 FD_SET( sockfd, &fds );
833 }
834 else if (count < 0)
835 {
836 *w_error = errno;
837 sigaction (SIGPIPE, &old_act, NULL);
838 TPT(( 0, FIL__, __LINE__, _("msg=<count < 0>\n")));
839 SL_RETURN( countbytes, _("sh_write_select"));
840 }
841 else /* count == 0 */
842 {
843 *w_error = errno;
844 sigaction (SIGPIPE, &old_act, NULL);
845 TPT(( 0, FIL__, __LINE__, _("msg=<count == 0>\n")));
846 SL_RETURN( countbytes, _("sh_write_select"));
847 }
848 }
849 }
850
851
852 /* restore signal handler
853 */
854 sigaction (SIGPIPE, &old_act, NULL);
855
856 *w_error = 0;
857
858 TPT(( 0, FIL__, __LINE__, _("msg=<count = %d>\n"), countbytes));
859 SL_RETURN( countbytes, _("sh_write_select"));
860}
861#endif
862
[27]863#if defined (SH_WITH_CLIENT) || defined(SH_WITH_SERVER)
[1]864unsigned long write_port (int sockfd, char *buf, unsigned long nbytes,
865 int * w_error, int timeout)
866{
867 unsigned long bytes;
868
869 SL_ENTER(_("write_port"));
870
871 bytes = sh_write_select(SH_DO_WRITE, sockfd, buf, nbytes, w_error, timeout);
872 if (*w_error != 0)
873 {
[132]874 char errbuf[SH_ERRBUF_SIZE];
[1]875 sh_error_handle((-1), FIL__, __LINE__, *w_error, MSG_TCP_NETRP,
[132]876 sh_error_message (*w_error, errbuf, sizeof(errbuf)),
877 (long) sockfd, _("write_port"));
[1]878 }
879 SL_RETURN( bytes, _("write_port"));
880}
881#endif
882
[27]883#if defined(HAVE_NTIME) || defined(SH_WITH_CLIENT) || defined(SH_WITH_SERVER)
[1]884
885unsigned long read_port (int sockfd, char *buf, unsigned long nbytes,
886 int * w_error, int timeout)
887{
888 unsigned long bytes;
889
890 SL_ENTER(_("read_port"));
891
892 bytes = sh_write_select(SH_DO_READ, sockfd, buf, nbytes, w_error, timeout);
893 if (*w_error != 0)
894 {
[132]895 char errbuf[SH_ERRBUF_SIZE];
[1]896 sh_error_handle((-1), FIL__, __LINE__, *w_error, MSG_TCP_NETRP,
[132]897 sh_error_message (*w_error, errbuf, sizeof(errbuf)),
898 (long) sockfd, _("read_port"));
[1]899 }
900 SL_RETURN( bytes, _("read_port"));
901}
902#endif
903
904#if defined(SH_WITH_CLIENT) || defined(SH_WITH_SERVER)
905
906int check_request_nerr (char * have, char * need)
907{
908 SL_ENTER(_("check_request_nerr"));
909 ASSERT_RET((have != NULL && need != NULL),
910 _("have != NULL && need != NULL"), (-1))
911
912 if ( (have[0] == need[0]) && (have[1] == need[1]) &&
913 (have[2] == need[2]) && (have[3] == need[3]))
914 SL_RETURN(0, _("check_request_nerr"));
915 SL_RETURN((-1), _("check_request_nerr"));
916}
917#endif
918
[27]919#if defined (SH_WITH_CLIENT) || defined(SH_WITH_SERVER)
[1]920
921int check_request (char * have, char * need)
922{
923 char first[21], second[5];
924 int i;
925
926 SL_ENTER(_("check_request"));
927 i = check_request_nerr (have, need);
928
929 if (i == 0)
930 SL_RETURN(0, _("check_request"));
931
932 for (i = 0; i < 4; ++i)
933 {
934 second[i] = need[i];
935 sprintf(&first[i*4], _("%c%03o"), /* known to fit */
936 '\\', (unsigned char) have[i]);
937 }
938
939 first[20] = '\0'; second[4] = '\0';
940
941 sh_error_handle((-1), FIL__, __LINE__, EINVAL, MSG_E_NETST,
942 second, first);
943 SL_RETURN((-1), _("check_request"));
944}
945#endif
946
947#if defined (SH_WITH_SERVER)
948
949int check_request_s (char * have, char * need, char * clt)
950{
951 char first[21], second[5];
952 int i;
953
954 SL_ENTER(_("check_request_s"));
955 i = check_request_nerr (have, need);
956
957 if (i == 0)
958 SL_RETURN( (0), _("check_request_s"));
959
960 for (i = 0; i < 4; ++i)
961 {
962 second[i] = need[i];
963 sprintf(&first[i*4], _("%c%03o"), /* known to fit */
964 '\\', (unsigned char) have[i]);
965 }
966 first[20] = '\0'; second[4] = '\0';
967 sh_error_handle((-1), FIL__, __LINE__, EINVAL, MSG_E_NETST1,
968 second, first, clt);
969 SL_RETURN( (-1), _("check_request_s"));
970}
971#endif
972
[27]973#if defined (SH_WITH_CLIENT) || defined (SH_WITH_SERVER)
[1]974
975void get_header (unsigned char * head, unsigned long * bytes, char * u)
976{
977 SL_ENTER(_("get_header"));
978
979 *bytes =
980 (256 * (unsigned int)head[1] + (unsigned int)head[2]);
981
982 if (u != NULL)
983 {
984 u[0] = head[3];
985 u[1] = head[4];
986 u[2] = head[5];
987 u[3] = head[6];
988 u[4] = '\0';
989 }
990
991 SL_RET0(_("get_header"));
992}
993#endif
994
995#if defined(SH_WITH_CLIENT) || defined(SH_WITH_SERVER)
996
997#ifdef SH_ENCRYPT_2
998#define TRANS_BYTES 65120
999#else
1000#define TRANS_BYTES 65280
1001#endif
1002
1003void put_header (unsigned char * head, int protocol,
1004 unsigned long * length, char * u)
1005{
1006
1007 /* static long transfer_limit = (8 * SH_BUFSIZE); V0.8 */
1008 static unsigned long transfer_limit = TRANS_BYTES + 6 + KEY_LEN;
1009
1010 SL_ENTER(_("put_header"));
1011
1012 head[0] = protocol;
1013
1014 ASSERT((*length < transfer_limit), _("*length < transfer_limit"))
1015
1016 if (*length > transfer_limit)
1017 *length = transfer_limit;
1018
1019 head[1] = (unsigned int)(*length/256);
1020 head[2] = (unsigned int)(*length-256 * head[1]);
1021 if (u == NULL)
1022 {
1023 head[3] = 0x01;
1024 head[4] = 0x01;
1025 head[5] = 0x01;
1026 head[6] = 0x01;
1027 }
1028 else
1029 {
1030 head[3] = u[0];
1031 head[4] = u[1];
1032 head[5] = u[2];
1033 head[6] = u[3];
1034 }
1035
1036 SL_RET0(_("put_header"));
1037}
1038#endif
1039
1040/* ------------------------------------------
1041 *
1042 * version 2 client/server protocol
1043 *
1044 * ------------------------------------------
1045 *
1046 * header : flag size[2]
1047 *
1048 * payload: random_pad[8] protocol[4] size[4] payload[payload_size] padding
1049 *
1050 * full_size <= 8192; payload_size <= 8176 (511*16); msg_size <= 8128 (508*16)
1051 * (msg_size = payload_size - key_len = payload_size - 48)
1052 */
[27]1053
1054/*
1055 * only SH_V2_FULLSIZE is used, and only once
1056 */
1057#if 0
[1]1058#ifdef SH_WITH_SERVER
1059#define SH_V2_FULLSIZE 240
1060#define SH_V2_PAYLOAD 224
1061#define SH_V2_MESSAGE 176
1062#else
1063#define SH_V2_FULLSIZE 1024
1064#define SH_V2_PAYLOAD 1008
1065#define SH_V2_MESSAGE 960
1066#endif
[27]1067#endif
1068#define SH_V2_FULLSIZE 1024
[1]1069
1070#ifdef SH_ENCRYPT
1071#include "rijndael-api-fst.h"
1072#endif
1073
1074void sh_tools_show_header (unsigned char * head, char sign)
1075{
1076#define SH_IS_ASCII(c) (((c) & ~0x7f) == 0)
1077
1078
1079 int msg_size = (256 * (unsigned int)head[1] + (unsigned int)head[2]);
1080 char code[32];
1081 char * p = &code[0];
1082
1083 memset (code, ' ', 32); /* space */
1084
1085 if ((head[0] & SH_PROTO_SRP) != 0) { p[0]='S';p[1]='R';p[2]='P';}
1086 p += 4;
1087 if ((head[0] & SH_PROTO_MSG) != 0) { p[0]='M';p[1]='S';p[2]='G';}
1088 p += 4;
1089 if ((head[0] & SH_PROTO_BIG) != 0) { p[0]='B';p[1]='I';p[2]='G';}
1090 p += 4;
1091 if ((head[0] & SH_PROTO_END) != 0) { p[0]='E';p[1]='N';p[2]='D';}
1092 p += 4;
1093 if ((head[0] & SH_PROTO_ENC) != 0) { p[0]='E';p[1]='N';p[2]='C';}
1094 p += 4;
1095 if ((head[0] & SH_PROTO_EN2) != 0) { p[0]='E';p[1]='N';p[2]='2';}
1096 code[23] = '\0';
1097
1098 if (SH_IS_ASCII(head[3]) && isalpha(head[3]) &&
1099 SH_IS_ASCII(head[4]) && isalpha(head[4]) &&
1100 SH_IS_ASCII(head[5]) && isalpha(head[5]) &&
1101 SH_IS_ASCII(head[6]) && isalpha(head[6])) {
1102 fprintf(stderr, "%c %3o %s %5d %c %c %c %c\n", sign,
1103 head[0], code, msg_size, head[3], head[4], head[5], head[6]);
1104 } else {
1105 fprintf(stderr, "%c %3o %s %5d %2X %2X %2X %2X\n", sign,
1106 head[0], code, msg_size, head[3], head[4], head[5], head[6]);
1107 }
1108 return;
1109}
1110
1111#ifdef SH_ENCRYPT
1112/*
1113 * #define DEBUG_EN2
1114 *
1115 * ingest version 1 7-byte header and payload, return version2 header/payload
1116 * last 4 bytes of outgoing header are set to dummy value
1117 */
1118char * sh_tools_makePack (unsigned char * header,
[34]1119 char * payload, unsigned long payload_size,
[1]1120 keyInstance * keyInstE)
1121{
1122 UINT32 rpad[3];
1123 unsigned char head[16];
1124 double epad;
[34]1125 unsigned long i_epad = 0;
1126 unsigned long i_blk = payload_size / 16;
1127 unsigned long i_blkmax = SH_V2_FULLSIZE / 16;
1128 unsigned long pads = 0;
1129 size_t full_size;
[1]1130 char * full_ret;
1131
1132 char * p;
1133 RIJ_BYTE inBlock[B_SIZ];
1134 RIJ_BYTE outBlock[B_SIZ];
1135 int j;
1136 cipherInstance cipherInst;
1137 int err_num;
1138 int blkfac;
[34]1139 int oflow = 0;
[1]1140
1141 /*
1142 SL_REQUIRE (i_blk*16 == payload_size, _("payload_size % 16 != 0"));
1143 */
1144 if ((i_blk * 16) != payload_size) ++i_blk;
1145#ifdef DEBUG_EN2
1146 fprintf(stderr, "SEND <%d> blocks <%d>\n", payload_size, i_blk);
1147#endif
1148 /* random_pad
1149 */
[137]1150 rpad[1] = taus_get ();
[1]1151 memcpy (head, &rpad[1], 4);
[137]1152 rpad[0] = taus_get ();
[1]1153 memcpy (&head[4], &rpad[0], 4);
[137]1154 rpad[2] = taus_get ();
[1]1155 memcpy (&head[8], &rpad[2], 4);
1156
1157 /* protocol
1158 */
1159 /* memcpy (&head[8], &header[3], 4); */
1160
1161 /* size (payload)
1162 */
1163 head[12] = header[1];
1164 head[13] = header[2];
1165 head[14] = '\0';
1166 head[15] = '\0';
1167
1168 if (i_blk < i_blkmax)
1169 {
1170 pads = i_blkmax - i_blk;
1171 /* memcpy((char *) &rpad[2], &head[12], 4); */
1172 epad = taus_get_double (&rpad);
1173#ifdef DEBUG_EN2
1174 fprintf(stderr, "PAD1 <%d> <%f>\n", pads, epad);
1175#endif
[34]1176 i_epad = (unsigned long) (pads * epad);
[1]1177#ifdef DEBUG_EN2
1178 fprintf(stderr, "PAD2 <%d> <%d>\n", i_epad, (i_epad*16));
1179#endif
1180 }
1181
[34]1182 full_size = 16; /* head */
1183 if (sl_ok_muls(i_blk, 16) && sl_ok_adds(full_size, (i_blk*16)))
1184 full_size = full_size + (i_blk*16); /* payload */
1185 else
1186 oflow = 1;
1187 if (sl_ok_adds(full_size, (i_epad*16)))
1188 full_size = full_size + (i_epad*16); /* pad */
1189 else
1190 i_epad = 0;
[1]1191
[34]1192 if (oflow)
1193 {
1194 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
1195 _("integer overflow"),
1196 _("sh_tools_makePack"));
1197 }
1198
[1]1199 full_ret = SH_ALLOC(full_size);
1200 memcpy(full_ret, head, 16);
[34]1201 if (payload != NULL && !oflow)
[1]1202 {
1203 memcpy(&full_ret[16], payload, payload_size);
1204 }
[34]1205 if ((i_blk*16) > payload_size && !oflow)
[1]1206 {
1207#ifdef DEBUG_EN2
1208 fprintf(stderr, "SEN2 <%d>\n", (i_blk*16) - payload_size);
1209#endif
1210 memset(&full_ret[16+payload_size], '\0', (i_blk*16) - payload_size);
1211 payload_size = i_blk * 16;
1212 }
1213 memset(&full_ret[16+payload_size], '\0', i_epad*16);
1214#ifdef DEBUG_EN2
1215 fprintf(stderr, "SEN3 <%d> <%d>\n", full_size, i_epad*16);
1216#endif
1217
1218 /* rewrite header
1219 */
1220 header[1] = (unsigned int)(full_size/256);
1221 header[2] = (unsigned int)(full_size - (256 * header[1]));
1222 /* don't erase protocol from header
1223 memset(&header[3], '\0', 4);
1224 */
1225 p = full_ret; blkfac = full_size / 16;
1226
1227 err_num = cipherInit (&cipherInst, MODE_CBC, NULL);
1228
1229 if (err_num < 0)
1230 {
[132]1231 char expbuf[SH_ERRBUF_SIZE];
[1]1232 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
[132]1233 errorExplain(err_num, expbuf, sizeof(expbuf)),
[1]1234 _("sh_tools_makePack: cipherInit"));
1235 }
1236 for (j = 0; j < blkfac; ++j)
1237 {
1238 memcpy(inBlock, p, B_SIZ);
1239 err_num = blockEncrypt(&cipherInst, keyInstE,
1240 inBlock, 128 * BNUM, outBlock);
1241 if (err_num < 0)
1242 {
[132]1243 char expbuf[SH_ERRBUF_SIZE];
[1]1244 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
[132]1245 errorExplain(err_num, expbuf, sizeof(expbuf)),
[1]1246 _("sh_tools_makePack: blockEncrypt"));
1247 }
1248 memcpy(p, outBlock, B_SIZ);
1249 p += B_SIZ;
1250 }
1251
1252 return full_ret;
1253}
1254
1255/* write a 7-byte header and return payload as expected by version 1
1256 * last 4 bytes of incoming header are dummy
1257 */
1258char * sh_tools_revertPack (unsigned char * header, char * message,
1259 keyInstance * keyInstD,
1260 unsigned long message_size)
1261{
1262 unsigned long msg_size;
1263 char * msg_ret;
1264
1265 char * p;
1266 RIJ_BYTE inBlock[B_SIZ];
1267 RIJ_BYTE outBlock[B_SIZ];
1268 int j;
1269 cipherInstance cipherInst;
1270 int err_num;
1271 int blkfac;
[132]1272 char expbuf[SH_ERRBUF_SIZE];
[1]1273
1274 msg_size = (256 * (unsigned int)header[1] + (unsigned int)header[2]);
1275#ifdef DEBUG_EN2
1276 fprintf(stderr, "RECV <%lu>\n", msg_size);
1277#endif
1278 if (msg_size > message_size) {
1279 msg_size = message_size;
1280#ifdef DEBUG_EN2
1281 fprintf(stderr, "RECV TRUNC1 <%lu>\n", msg_size);
1282#endif
1283 }
1284
1285 p = message; blkfac = msg_size / 16;
1286
1287 err_num = cipherInit (&cipherInst, MODE_CBC, NULL);
1288
1289 if (err_num < 0)
1290 {
1291 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
[132]1292 errorExplain(err_num, expbuf, sizeof(expbuf)),
[1]1293 _("sh_tools_revertPack: cipherInit"));
1294 }
1295 for (j = 0; j < blkfac; ++j)
1296 {
1297 memcpy(inBlock, p, B_SIZ);
1298 err_num = blockDecrypt(&cipherInst, keyInstD,
1299 inBlock, 128 * BNUM, outBlock);
1300 if (err_num < 0)
1301 {
1302 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
[132]1303 errorExplain(err_num, expbuf, sizeof(expbuf)),
[1]1304 _("sh_tools_revertPack: blockDecrypt"));
1305 }
1306 memcpy(p, outBlock, B_SIZ);
1307 p += B_SIZ;
1308 }
1309
1310 /* rewrite size in header
1311 */
1312 header[1] = message[12];
1313 header[2] = message[13];
1314 msg_size = (256 * (unsigned int)header[1] + (unsigned int)header[2]);
1315
1316 if (msg_size > (message_size-16))
1317 {
1318 msg_size = message_size-16;
1319 header[1] = (unsigned int)(msg_size/256);
1320 header[2] = (unsigned int)(msg_size - (256 * header[1]));
1321#ifdef DEBUG_EN2
1322 fprintf(stderr, "RECV TRUNC2 <%lu>\n", msg_size);
1323#endif
1324 }
1325#ifdef DEBUG_EN2
1326 fprintf(stderr, "REC2 <%lu>\n", msg_size);
1327#endif
1328 /* protocol
1329 */
1330 /* memcpy(&header[3], &message[8], 4); */
1331
1332 /* payload
1333 */
1334 msg_ret = SH_ALLOC(msg_size+1);
1335 if (msg_size > 0)
1336 {
1337 memcpy(msg_ret, &message[16], msg_size);
1338 }
1339 msg_ret[msg_size] = '\0';
1340#ifdef DEBUG_EN2
1341 fprintf(stderr, "REC3 <%lu>\n", msg_size);
1342#endif
1343 SH_FREE(message);
1344
1345 return msg_ret;
1346}
1347#endif
1348
1349int sh_tools_hash_add(char * key, char * buf, int buflen)
1350{
1351 char * theSig;
[133]1352 char sigbuf[KEYBUF_SIZE];
[1]1353
1354 SL_ENTER(_("sh_tools_hash_add"));
1355
[133]1356 theSig = sh_util_siggen (key, buf, buflen, sigbuf, sizeof(sigbuf));
[1]1357 sl_strlcat(buf, theSig, buflen + KEY_LEN + 1);
1358
1359 SL_RETURN((0), _("sh_tools_hash_add"));
1360}
1361
1362
1363/* return 0 (== FALSE) if no match, else 1 (== TRUE)
1364 */
1365int sh_tools_hash_vfy(char * key, char * buf, int buflen)
1366{
1367 char hash[KEY_LEN+1];
1368 register int i;
1369 char * theSig;
[133]1370 char sigbuf[KEYBUF_SIZE];
[1]1371
1372 SL_ENTER(_("sh_tools_hash_vfy"));
1373
[133]1374 theSig = sh_util_siggen (key, buf, buflen, sigbuf, sizeof(sigbuf));
[1]1375 sl_strlcpy(hash, theSig, KEY_LEN+1);
1376
1377 for (i = 0; i < KEY_LEN; ++i)
1378 {
1379 if (buf[buflen + i] != hash[i])
1380 SL_RETURN((0), _("sh_tools_hash_vfy"));
1381 }
1382
1383 SL_RETURN((1), _("sh_tools_hash_vfy"));
1384}
1385
1386/* ------------------------------------------ */
1387
1388#if defined (SH_WITH_SERVER)
1389
1390/* add a checksum to a buffer; put checksum in front
1391 */
1392char * hash_me (char * key, char * buf, int buflen)
1393{
1394 char hash[KEY_LEN+1];
[34]1395 char * temp = NULL;
[1]1396 register int i;
1397 int total = 0;
1398 char * theSig;
[133]1399 char sigbuf[KEYBUF_SIZE];
[1]1400
1401
1402 SL_ENTER(_("hash_me"));
1403
1404#ifdef DEBUG_EN2
1405 fprintf(stderr, "hash_me <%s> <%d>\n",
1406 (key == NULL) ? "NULL" : key, buflen);
1407#endif
1408 /* key = H(NSRV,NCLT,SK)
1409 */
1410 ASSERT_RET((key != NULL), _("key != NULL"), (NULL));
1411 ASSERT_RET((buflen >= 0), _("buflen >= 0"), (NULL));
1412
[133]1413 theSig = sh_util_siggen (key, buf, buflen, sigbuf, sizeof(sigbuf));
[1]1414 sl_strlcpy(hash, theSig, KEY_LEN+1);
1415
[34]1416 if (sl_ok_adds(buflen, KEY_LEN))
1417 {
1418 total = KEY_LEN + buflen;
1419 temp = SH_ALLOC (total);
[1]1420
[34]1421 for (i = 0; i < KEY_LEN; ++i)
1422 temp[i] = hash[i];
[1]1423
[34]1424 for (i = 0; i < buflen; ++i)
1425 temp[i+KEY_LEN] = buf[i];
1426 }
1427 else
1428 {
1429 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
1430 _("integer overflow"),
1431 _("hash_me"));
1432 temp = sh_util_strdup(buf);
1433 }
[1]1434 SL_RETURN(temp, _("hash_me"));
1435}
1436#endif
1437
[27]1438#if defined(SH_WITH_CLIENT) || defined(SH_WITH_SERVER)
[1]1439
1440/* verify the checksum of a buffer; checksum comes first
1441 */
1442int hash_check(char * key,
1443 char * buf, int buflen)
1444{
1445 char hash[KEY_LEN+1];
1446 register int i;
1447 char * theSig;
[133]1448 char sigbuf[KEYBUF_SIZE];
[1]1449
1450 SL_ENTER(_("hash_check"));
1451
1452#ifdef DEBUG_EN2
1453 fprintf(stderr, "hash_check <%s> <%d>\n",
1454 (key == NULL) ? "NULL" : key, buflen);
1455#endif
[133]1456 theSig = sh_util_siggen (key, &buf[KEY_LEN], buflen-KEY_LEN,
1457 sigbuf, sizeof(sigbuf));
[1]1458 sl_strlcpy(hash, theSig, KEY_LEN+1);
1459
1460 for (i = 0; i < KEY_LEN; ++i)
1461 {
1462 if (buf[i] != hash[i])
1463 SL_RETURN((-1), _("hash_check"));
1464 }
1465 SL_RETURN((0), _("hash_check"));
1466}
1467
1468#endif
1469
1470#if defined (SH_WITH_SERVER)
1471
1472char * get_client_conf_file (char * peer, unsigned long * length)
1473{
1474 char * ret;
[34]1475 int status;
[1]1476 struct stat buf;
1477 char * base;
[34]1478 size_t size;
[1]1479
1480 SL_ENTER(_("get_client_conf_file"));
1481
[34]1482 base = sh_util_strdup(DEFAULT_DATAROOT);
[1]1483
[34]1484 size = sl_strlen(base);
1485 if (sl_ok_adds(size, sl_strlen(peer)))
1486 size += sl_strlen(peer);
1487 if (sl_ok_adds(size, 6))
1488 size += 6;
[1]1489
1490 ret = SH_ALLOC(size);
1491 sl_strlcpy(ret, base, size);
1492 sl_strlcat(ret, _("/rc."), size);
1493 sl_strlcat(ret, peer, size);
1494
1495 status = retry_stat (FIL__, __LINE__, ret, &buf);
1496
1497 if (status == 0)
1498 goto lab_end;
1499 else
1500 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, status, MSG_E_ACCESS,
1501 (long) sh.effective.uid, ret);
1502
1503 sl_strlcpy(ret, base, size);
1504 sl_strlcat(ret, "/rc", size);
1505
1506 status = retry_stat (FIL__, __LINE__, ret, &buf);
1507
1508 if (status == 0)
1509 goto lab_end;
1510 else
1511 sh_error_handle(SH_ERR_ERR, FIL__, __LINE__, status, MSG_E_ACCESS,
1512 (long) sh.effective.uid, ret);
1513
1514 SH_FREE(base);
[34]1515 SH_FREE(ret);
[1]1516 *length=0;
1517 SL_RETURN(NULL, _("get_client_conf_file"));
1518
1519 lab_end:
1520 if (buf.st_size > 0x7fffffff)
1521 {
1522 sh_error_handle(SH_ERR_ERR, FIL__, __LINE__, status, MSG_E_SUBGEN,
1523 _("File too large"), _("get_client_conf_file"));
1524 SH_FREE(base);
1525 SL_RETURN(NULL, _("get_client_conf_file"));
1526 }
1527 *length = (unsigned long) buf.st_size;
1528 SH_FREE(base);
1529 SL_RETURN(ret, _("get_client_conf_file"));
1530}
1531
1532char * get_client_data_file (char * peer, unsigned long * length)
1533{
1534 char * ret;
[34]1535 int status;
[1]1536 struct stat buf;
1537
1538 char * base;
[34]1539 size_t size;
[1]1540
1541 SL_ENTER(_("get_client_data_file"));
1542
[34]1543 base = sh_util_strdup(DEFAULT_DATAROOT);
[1]1544
[34]1545 size = sl_strlen(base);
1546 if (sl_ok_adds(size, sl_strlen(peer)))
1547 size += sl_strlen(peer);
1548 if (sl_ok_adds(size, 8))
1549 size += 8;
[1]1550
1551 ret = SH_ALLOC(size);
1552 sl_strlcpy(ret, base, size);
1553 sl_strlcat(ret, _("/file."), size);
1554 sl_strlcat(ret, peer, size);
1555
1556 status = retry_stat (FIL__, __LINE__, ret, &buf);
1557
1558 if (status == 0)
1559 goto lab1_end;
1560 else
1561 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, status, MSG_E_ACCESS,
1562 (long) sh.effective.uid, ret);
1563
1564
1565 sl_strlcpy(ret, base, size);
1566 sl_strlcat(ret, _("/file"), size);
1567
1568 status = retry_stat (FIL__, __LINE__, ret, &buf);
1569
1570 if (status == 0)
1571 goto lab1_end;
1572 else
1573 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, status, MSG_E_ACCESS,
1574 (long) sh.effective.uid, ret);
1575
1576
1577 *length = 0;
1578 SH_FREE(base);
[34]1579 SH_FREE(ret);
[1]1580 SL_RETURN(NULL, _("get_client_data_file"));
1581
1582 lab1_end:
1583 if (buf.st_size > 0x7fffffff)
1584 {
1585 sh_error_handle(SH_ERR_ERR, FIL__, __LINE__, status, MSG_E_SUBGEN,
1586 _("File too large"), _("get_client_data_file"));
1587 SH_FREE(base);
1588 SL_RETURN(NULL, _("get_client_data_file"));
1589 }
1590 *length = (unsigned long) buf.st_size;
1591 SH_FREE(base);
1592 SL_RETURN(ret, _("get_client_data_file"));
1593
1594}
1595#endif
1596
[27]1597#if defined(SH_WITH_CLIENT) || defined(SH_WITH_SERVER) || defined(SH_STEALTH) || defined(WITH_GPG) || defined(WITH_PGP)
[1]1598
1599/* --------- secure temporary file ------------ */
1600
1601SL_TICKET open_tmp ()
1602{
1603 SL_TICKET fd;
1604 UINT32 ticks;
1605 char * file;
1606 struct stat buf;
1607 int error;
1608 int status = BAD;
1609 char * my_tmp_dir;
[133]1610 char hashbuf[KEYBUF_SIZE];
[1]1611
1612 SL_ENTER(_("open_tmp"));
1613
1614#if defined(SH_TMPDIR)
[34]1615 my_tmp_dir = sh_util_strdup(SH_TMPDIR);
[1]1616#else
1617#if defined(SH_WITH_SERVER)
[34]1618 my_tmp_dir = sh_util_strdup(DEFAULT_LOGDIR);
[1]1619#else
[34]1620 my_tmp_dir = sh_util_strdup(sh.effective.home);
[1]1621#endif
1622#endif
1623
1624 if (0 != tf_trust_check (my_tmp_dir, SL_YESPRIV))
1625 {
1626 dlog(1, FIL__, __LINE__,
1627 _("The directory for temporary files: %s is untrusted, i.e. an\nuntrusted user owns or can write to some directory in the path.\n"),
1628 my_tmp_dir);
1629 sh_error_handle ((-1), FIL__, __LINE__, EACCES, MSG_TRUST,
1630 (long) sh.effective.uid,
1631 my_tmp_dir);
1632 SH_FREE(my_tmp_dir);
1633 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
1634 }
1635
1636 do {
1637
1638 /* create random filename in effective users home directory
1639 */
[137]1640 ticks = taus_get ();
[1]1641 if (my_tmp_dir[0] == '/' && my_tmp_dir[1] == '\0')
1642 file = sh_util_strconcat (my_tmp_dir,
[133]1643 sh_tiger_hash( (char *) &ticks, TIGER_DATA, 4,
1644 hashbuf, sizeof(hashbuf)),
[1]1645 NULL);
1646 else
1647 file = sh_util_strconcat (my_tmp_dir,
1648 "/",
[133]1649 sh_tiger_hash( (char *) &ticks, TIGER_DATA, 4,
1650 hashbuf, sizeof(hashbuf)),
[1]1651 NULL);
1652
1653 /* check whether it already exists (paranoia)
1654 */
1655 errno = 0;
1656 status = retry_lstat(FIL__, __LINE__, file, &buf);
1657 error = errno;
1658
1659 if ( (status < 0) && (error == ENOENT) ) /* file does not exist */
1660 status = GOOD;
1661 else if (status < 0) /* unexpected error condition */
1662 {
1663 SH_FREE (file);
1664 SH_FREE(my_tmp_dir);
1665 TPT(( 0, FIL__, __LINE__, _("msg=<Unexpected error %d>\n"), error));
1666 SL_RETURN((-1), _("open_tmp"));
1667 }
1668 else /* file exists */
1669 {
1670 status = BAD;
1671 TPT(( 0, FIL__, __LINE__, _("msg=<Temporary file exists already>\n")));
1672 }
1673
1674 if (status == GOOD)
1675 {
1676 if (0 == tf_trust_check (file, SL_YESPRIV))
1677 status = GOOD;
1678 else
1679 {
1680 status = BAD;
1681 TPT(( 0, FIL__, __LINE__, _("msg=<Temporary file untrusted>\n")));
1682 }
1683 }
1684
1685 if (status == BAD)
1686 SH_FREE (file);
1687
1688 } while (status == BAD);
1689
1690 fd = sl_open_safe_rdwr (file, SL_YESPRIV);
1691 if (SL_ISERROR(fd))
1692 {
1693 sh_error_handle(SH_ERR_ALL, FIL__, __LINE__, fd, MSG_E_SUBGEN,
1694 _("Error opening temporary file"), _("open_tmp"));
1695 TPT(( 0, FIL__, __LINE__, _("msg=<Error %d temporary file %s>\n"),
1696 fd, file));
1697 }
1698
1699
1700 SH_FREE (file);
1701 SH_FREE(my_tmp_dir);
1702
1703 if (!SL_ISERROR(fd)) {
1704 sl_unlink(fd);
1705 }
1706
1707 if (!SL_ISERROR(fd))
1708 SL_RETURN((fd), _("open_tmp"));
1709 else
1710 SL_RETURN((-1), _("open_tmp"));
1711}
1712
1713
1714int close_tmp (SL_TICKET fd)
1715{
1716 SL_ENTER(_("close_tmp"));
1717
1718 if (SL_ISERROR(sl_close (fd)))
1719 SL_RETURN((-1), _("close_tmp"));
1720 SL_RETURN((0), _("close_tmp"));
1721}
1722
1723int rewind_tmp (SL_TICKET fd)
1724{
1725 SL_ENTER(_("rewind_tmp"));
1726
1727 if (SL_ISERROR(sl_rewind (fd)))
1728 SL_RETURN((-1), _("rewind_tmp"));
1729 SL_RETURN((0), _("rewind_tmp"));
1730}
1731#endif
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