source: trunk/src/sh_tools.c@ 132

Last change on this file since 132 was 132, checked in by rainer, 18 years ago

Make utility functions thread-safe.
File size: 40.6 KB
Line 
1/* SAMHAIN file system integrity testing */
2/* Copyright (C) 1999, 2000 Rainer Wichmann */
3/* */
4/* This program is free software; you can redistribute it */
5/* and/or modify */
6/* it under the terms of the GNU General Public License as */
7/* published by */
8/* the Free Software Foundation; either version 2 of the License, or */
9/* (at your option) any later version. */
10/* */
11/* This program is distributed in the hope that it will be useful, */
12/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
13/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
14/* GNU General Public License for more details. */
15/* */
16/* You should have received a copy of the GNU General Public License */
17/* along with this program; if not, write to the Free Software */
18/* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
19
20#include "config_xor.h"
21
22
23#include <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
80#define SH_REAL_SET
81
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"
90
91#undef FIL__
92#define FIL__ _("sh_tools.c")
93
94#ifdef SH_ENCRYPT
95#include "rijndael-api-fst.h"
96char * errorExplain (int err_num, char * buffer, size_t len)
97{
98 char * p;
99
100 if (err_num == BAD_KEY_DIR)
101 p = (_("Key direction is invalid"));
102 else if (err_num == BAD_KEY_MAT)
103 p = (_("Key material not of correct length"));
104 else if (err_num == BAD_KEY_INSTANCE)
105 p = (_("Key passed is not valid"));
106 else if (err_num == BAD_CIPHER_MODE)
107 p = (_("Params struct passed to cipherInit invalid"));
108 else if (err_num == BAD_CIPHER_STATE)
109 p = (_("Cipher in wrong state"));
110 else if (err_num == BAD_BLOCK_LENGTH)
111 p = (_("Bad block length"));
112 else if (err_num == BAD_CIPHER_INSTANCE)
113 p = (_("Bad cipher instance"));
114 else if (err_num == BAD_DATA)
115 p = (_("Data contents are invalid"));
116 else
117 p = (_("Unknown error"));
118 sl_strlcpy (buffer, p, len);
119 return buffer;
120}
121
122#endif
123
124/* --- recode all \blah escapes to '=XX' format, and also code all
125 * remaining unprintable chars ---
126 */
127#define SH_PUT_4(p, a, b, c) (p)[0] = (a); (p)[1] = (b); (p)[2] = (c);
128
129char * sh_tools_safe_name (const char * instr, int flag)
130{
131 unsigned char c, d;
132 const char * p;
133 char tmp[4];
134 char * outstr;
135 size_t len = 1;
136 int i = 0;
137 unsigned char val_octal = '\0';
138 static char ctable[16] = { '0', '1', '2', '3', '4', '5', '6', '7',
139 '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
140
141 SL_ENTER(_("sh_tools_safe_name"));
142
143 if (instr)
144 {
145 len = strlen(instr);
146 if (sl_ok_muls (3, len) && sl_ok_adds ((3*len), 4))
147 {
148 len = (3 * len) + 4;
149 p = instr;
150 }
151 else
152 {
153 len = 1;
154 p = NULL;
155 }
156 }
157 else
158 {
159 p = NULL;
160 }
161
162 outstr = SH_ALLOC(len);
163
164 outstr[0] = '\0';
165 tmp[3] = '\0';
166
167#if !defined(SH_USE_XML)
168 (void) flag; /* fix compiler warning */
169#endif
170
171 if (!p)
172 goto end;
173
174 while (*p)
175 {
176 c = *p;
177
178 if (*p == '\n')
179 {
180 outstr[i] = ' '; ++i; ++p;
181 continue;
182 }
183
184#ifdef SH_USE_XML
185 if (flag == 1)
186 {
187 if ((*p) == '"')
188 {
189 SH_PUT_4(&outstr[i], '=', '2', '2');
190 i+=3; ++p;
191 continue;
192 }
193 else if ((*p) == '&')
194 {
195 SH_PUT_4(&outstr[i], '=', '2', '6');
196 i+=3; ++p;
197 continue;
198 }
199 else if ((*p) == '<')
200 { /* left angle */
201 SH_PUT_4(&outstr[i], '=', '3', 'c');
202 i+=3; ++p;
203 continue;
204 }
205 else if ((*p) == '>')
206 { /* right angle */
207 SH_PUT_4(&outstr[i], '=', '3', 'e');
208 i+=3; ++p;
209 continue;
210 }
211 }
212#endif
213
214 if ( (*p) != '\\' && (*p) != '&' && (*p) != '=' && (*p) != '\'')
215 {
216 outstr[i] = *p; ++i;
217 ++p;
218
219 if (c < 32 || c > 126)
220 {
221 --i;
222 d = c % 16; c = c / 16;
223 outstr[i] = '='; ++i;
224 outstr[i] = ctable[c]; ++i;
225 outstr[i] = ctable[d]; ++i;
226 }
227
228 continue;
229 }
230 else if ((*p) == '\'')
231 {
232 SH_PUT_4(&outstr[i], '=', '2', '7');
233 i+=3; ++p;
234 }
235 else if (*p == '=')
236 {
237 if (p[1] != '"' && p[1] != '<')
238 {
239 SH_PUT_4(&outstr[i], '=', '3', 'd');
240 i+=3; ++p;
241 }
242 else
243 { outstr[i] = *p; ++i; ++p; }
244 }
245 else if (*p == '\\')
246 {
247 ++p;
248 if (!p)
249 break;
250 if (!(*p))
251 break;
252
253 c = *p;
254
255 switch (*p) {
256 case '\\':
257 SH_PUT_4(&outstr[i], '=', '5', 'c');
258 i+=3; ++p;
259 break;
260 case 'n':
261 SH_PUT_4(&outstr[i], '=', '0', 'a');
262 i+=3; ++p;
263 break;
264 case 'b':
265 SH_PUT_4(&outstr[i], '=', '0', '8');
266 i+=3; ++p;
267 break;
268 case 'r':
269 SH_PUT_4(&outstr[i], '=', '0', 'd');
270 i+=3; ++p;
271 break;
272 case 't':
273 SH_PUT_4(&outstr[i], '=', '0', '9');
274 i+=3; ++p;
275 break;
276 case 'v':
277 SH_PUT_4(&outstr[i], '=', '0', 'b');
278 i+=3; ++p;
279 break;
280 case 'f':
281 SH_PUT_4(&outstr[i], '=', '0', 'c');
282 i+=3; ++p;
283 break;
284 case '\'':
285 SH_PUT_4(&outstr[i], '=', '2', '7');
286 i+=3; ++p;
287 break;
288 case '"': /* also encode quoted '"' */
289 SH_PUT_4(&outstr[i], '=', '2', '2');
290 i+=3; ++p;
291 break;
292 case ' ':
293 SH_PUT_4(&outstr[i], '=', '2', '0');
294 i+=3; ++p;
295 break;
296 default:
297 if (strlen(p) < 3) /* certainly not an octal number, skip */
298 {
299 p += strlen(p);
300 }
301 else
302 {
303 tmp[0] = p[0]; tmp[1] = p[1]; tmp[2] = p[2];
304 val_octal = (unsigned char) strtoul(tmp, (char **)NULL, 8);
305 if (val_octal != '\0') {
306 c = val_octal;
307 d = c % 16; c = c / 16;
308 outstr[i] = '='; ++i;
309 outstr[i] = ctable[c]; ++i;
310 outstr[i] = ctable[d]; ++i;
311 }
312 p += 3;
313 }
314 }
315 }
316 else if (*p == '&')
317 {
318 ++p;
319 if (!p || !(*p))
320 {
321 outstr[i] = '&'; ++i;
322 break;
323 }
324
325 if (p[0] == 'a' && p[1] == 'm' && p[2] == 'p' && p[3] == ';')
326 {
327 SH_PUT_4(&outstr[i], '=', '2', '6');
328 i+=3; p += 4;
329 }
330 else if (p[0] == 'q' && p[1] == 'u' && p[2] == 'o' && p[3] == 't' &&
331 p[4] == ';')
332 {
333 SH_PUT_4(&outstr[i], '=', '2', '2');
334 i+=3; p += 5;
335 }
336 else if (p[0] == 'l' && p[1] == 't' && p[2] == ';')
337 {
338 SH_PUT_4(&outstr[i], '=', '3', 'c');
339 i+=3; p += 3;
340 }
341 else if (p[0] == 'g' && p[1] == 't' && p[2] == ';')
342 {
343 SH_PUT_4(&outstr[i], '=', '3', 'e');
344 i+=3; p += 3;
345 }
346 else /* conserve the '&' */
347 {
348 outstr[i] = '&'; ++i;
349 }
350 }
351 else
352 {
353 outstr[i] = *p; ++i;
354 ++p;
355 }
356 } /* while (p && *p) */
357
358 end:
359
360 outstr[i] = '\0';
361 SL_RETURN( outstr, _("sh_tools_safe_name"));
362}
363
364
365/* extern int h_errno; */
366
367char * sh_tools_errmessage (int tellme, char * errbuf, size_t len)
368{
369 char * p = NULL;
370#ifdef HOST_NOT_FOUND
371 if (tellme == HOST_NOT_FOUND)
372 p = _("The specified host is unknown: ");
373#endif
374#ifdef NO_ADDRESS
375 if (tellme == NO_ADDRESS)
376 p = _("The requested name is valid but does not have an IP address: ");
377#endif
378#ifdef NO_RECOVERY
379 if (tellme == NO_RECOVERY)
380 p = _("A non-recoverable name server error occurred: ");
381#endif
382#ifdef TRY_AGAIN
383 if (tellme == TRY_AGAIN)
384 p = _("A temporary error occurred on an authoritative name server. The specified host is unknown: ");
385#endif
386 if (!p) p = _("Unknown error");
387 sl_strlcpy(errbuf, p, len);
388 return errbuf;
389}
390
391int is_numeric (const char * address)
392{
393 int j;
394 int len = sl_strlen(address);
395
396 for (j = 0; j < len; ++j)
397 if ( (address[j] < '0' || address[j] > '9') && address[j] != '.')
398 return (1 == 0);
399 return (1 == 1);
400}
401
402#if defined (SH_WITH_SERVER)
403
404int get_open_max ()
405{
406 int value;
407
408#ifdef _SC_OPEN_MAX
409 value = sysconf (_SC_OPEN_MAX);
410#else
411#ifdef OPEN_MAX
412 value = OPEN_MAX;
413#else
414 value = _POSIX_OPEN_MAX;
415#endif
416#endif
417
418 if (value < 0)
419 value = 8; /* POSIX lower limit */
420
421 if (value > 4096)
422 value = 4096;
423
424 return value;
425}
426
427#endif
428
429typedef struct _sin_cache {
430 char * address;
431 struct sockaddr_in sin;
432 struct _sin_cache * next;
433} sin_cache;
434
435static sin_cache * conn_cache = NULL;
436static int cached_addr = 0;
437
438void delete_cache()
439{
440 sin_cache * check_cache = conn_cache;
441 sin_cache * old_entry = conn_cache;
442
443 SL_ENTER(_("delete_cache"));
444
445 while (check_cache != NULL)
446 {
447 old_entry = check_cache;
448 check_cache = check_cache->next;
449 SH_FREE(old_entry->address);
450 SH_FREE(old_entry);
451 }
452
453 cached_addr = 0;
454
455 conn_cache = NULL;
456 SL_RET0(_("delete_cache"));
457}
458
459int DoReverseLookup = S_TRUE;
460
461int set_reverse_lookup (const char * c)
462{
463 return sh_util_flagval(c, &DoReverseLookup);
464}
465
466int connect_port (char * address, int port,
467 char * ecall, int * errnum, char * errmsg, int errsiz)
468{
469 struct in_addr haddr; /* host address from numeric */
470 /* host details returned by the DNS */
471 struct hostent *host_entry = NULL;
472 struct sockaddr_in sinr; /* socket to the remote host */
473
474 char * host_name;
475
476 int fd = (-1);
477 int status;
478 int fail = 0;
479 int cached = 0;
480
481 int retval;
482 char errbuf[SH_ERRBUF_SIZE];
483
484 sin_cache * check_cache = conn_cache;
485
486 SL_ENTER(_("connect_port"));
487
488 /* paranoia -- should not happen
489 */
490 if (cached_addr > 128)
491 delete_cache();
492
493 if (check_cache != NULL)
494 {
495 while (check_cache && check_cache->address)
496 {
497 if ( 0 == sl_strncmp(check_cache->address,
498 address, sl_strlen(address)))
499 {
500 memcpy (&sinr, &(check_cache->sin), sizeof(struct sockaddr_in));
501 sinr.sin_family = AF_INET;
502 sinr.sin_port = htons (port);
503 cached = 1;
504 break;
505 }
506 if (check_cache->next)
507 check_cache = check_cache->next;
508 else
509 check_cache = NULL;
510 }
511 }
512
513 /* only use gethostbyname() if neccessary
514 */
515 if (cached == 0)
516 {
517#ifdef HAVE_INET_ATON
518 if (0 == inet_aton(address, &haddr))
519#else
520 if ((unsigned long)-1 == (haddr.s_addr = inet_addr(address)))
521#endif
522 {
523
524 host_entry = sh_gethostbyname(address);
525
526 if (host_entry == NULL || host_entry->h_addr == NULL)
527 {
528 sl_strlcpy(ecall, _("gethostbyname"), SH_MINIBUF);
529#ifndef NO_H_ERRNO
530 *errnum = h_errno;
531#else
532 *errnum = 666;
533#endif
534 (void) sh_tools_errmessage (*errnum, errmsg, errsiz);
535 sl_strlcat(errmsg, address, errsiz);
536 fail = (-1);
537 }
538 else
539 {
540 sinr.sin_family = AF_INET;
541 sinr.sin_port = htons (port);
542 sinr.sin_addr = *(struct in_addr *) host_entry->h_addr;
543
544
545 /* reverse DNS lookup
546 */
547 if (DoReverseLookup == S_TRUE)
548 {
549 if (host_entry->h_name == NULL)
550 {
551 host_name = SH_ALLOC(1);
552 host_name[0] = '\0';
553 }
554 else
555 {
556 host_name = sh_util_strdup(host_entry->h_name);
557 }
558
559 host_entry = sh_gethostbyaddr ((char *) &sinr.sin_addr,
560 sizeof(struct in_addr),
561 AF_INET);
562 if (host_entry == NULL || host_entry->h_name == NULL)
563 {
564 sl_strlcpy(ecall, _("gethostbyaddr"), SH_MINIBUF);
565#ifndef NO_H_ERRNO
566 *errnum = h_errno;
567#else
568 *errnum = 666;
569#endif
570 (void) sh_tools_errmessage (*errnum, errmsg, errsiz);
571 sl_strlcat(errmsg,
572 inet_ntoa (*(struct in_addr *) &(sinr.sin_addr)),
573 errsiz);
574 fail = (-1);
575 }
576 else
577 {
578 *errnum = 0;
579 if (sl_strlen(host_entry->h_name) == 0 ||
580 (*errnum = sl_strcmp(host_name,host_entry->h_name)) != 0)
581 {
582 if (*errnum)
583 sl_strlcpy(ecall, _("strcmp"), SH_MINIBUF);
584 else
585 sl_strlcpy(ecall, _("strlen"), SH_MINIBUF);
586 sl_strlcpy(errmsg, _("Reverse lookup failed."),
587 errsiz);
588 sl_strlcat(errmsg, address, errsiz);
589 sl_strlcat(errmsg, _(" vs "), errsiz);
590 sl_strlcat(errmsg,
591 inet_ntoa (*(struct in_addr *) &(sinr.sin_addr)),
592 errsiz);
593 fail = -1;
594 }
595 }
596
597 SH_FREE(host_name);
598 }
599 }
600 }
601
602 else /* address was numeric */
603 {
604 sinr.sin_family = AF_INET;
605 sinr.sin_port = htons (port);
606 sinr.sin_addr = haddr;
607 }
608
609
610 if (fail != -1)
611 {
612 /* put it into the cache
613 */
614 check_cache = SH_ALLOC(sizeof(sin_cache));
615 check_cache->address = SH_ALLOC(sl_strlen(address) + 1);
616 sl_strlcpy (check_cache->address, address, sl_strlen(address) + 1);
617 memcpy(&(check_cache->sin), &sinr, sizeof(struct sockaddr_in));
618 ++cached_addr;
619
620 if (conn_cache)
621 {
622 if (conn_cache->next)
623 check_cache->next = conn_cache->next;
624 else
625 check_cache->next = NULL;
626 conn_cache->next = check_cache;
627 }
628 else
629 {
630 check_cache->next = NULL;
631 conn_cache = check_cache;
632 }
633 }
634 }
635
636
637 if (fail != (-1))
638 {
639 fd = socket(AF_INET, SOCK_STREAM, 0);
640 if (fd < 0) {
641 fail = (-1);
642 status = errno;
643 sl_strlcpy(ecall, _("socket"), SH_MINIBUF);
644 *errnum = status;
645 sl_strlcpy(errmsg, sh_error_message (status, errbuf, sizeof(errbuf)), errsiz);
646 sl_strlcat(errmsg, _(", address "), errsiz);
647 sl_strlcat(errmsg, address, errsiz);
648 }
649 }
650
651 if (fail != (-1)) {
652
653 if ( retry_connect(FIL__, __LINE__, fd,
654 (struct sockaddr *) &sinr, sizeof(sinr)) < 0)
655 {
656 status = errno;
657 sl_strlcpy(ecall, _("connect"), SH_MINIBUF);
658 *errnum = status;
659 sl_strlcpy(errmsg, sh_error_message (status, errbuf, sizeof(errbuf)), errsiz);
660 sl_strlcat(errmsg, _(", address "), errsiz);
661 sl_strlcat(errmsg, address, errsiz);
662 close(fd);
663 fail = (-1);
664 }
665 }
666
667 retval = (fail < 0) ? (-1) : fd;
668 SL_RETURN(retval, _("connect_port"));
669}
670
671int connect_port_2 (char * address1, char * address2, int port,
672 char * ecall, int * errnum, char * errmsg, int errsiz)
673{
674 int retval = (-1);
675
676 SL_ENTER(_("connect_port_2"));
677
678 errmsg[0] = '\0';
679 *errnum = 0;
680
681 if (address1 != NULL && address1[0] != '\0')
682 retval = connect_port (address1, port,
683 ecall, errnum,
684 errmsg, errsiz);
685
686 if (retval < 0 && address2 != NULL && address2[0] != '\0')
687 {
688 /* can't use sh_error_handle here, as this would cause an infinite
689 * loop if called from sh_unix_time
690 */
691 TPT(( 0, FIL__, __LINE__, _("msg=<Using alternative server %s.>\n"),
692 address2));
693 retval = connect_port (address2, port,
694 ecall, errnum,
695 errmsg, errsiz);
696 }
697
698 if ((retval < 0) &&
699 (address1 == NULL || address1[0] == '\0') &&
700 (address1 == NULL || address1[0] == '\0'))
701 {
702 sl_strlcpy(ecall, _("connect_port_2"), SH_MINIBUF);
703 sl_strlcpy(errmsg, _("No server address known"), errsiz);
704 }
705 SL_RETURN(retval, _("connect_port_2"));
706 /* return retval; */
707}
708
709#if defined(HAVE_NTIME) || defined(SH_WITH_CLIENT) || defined(SH_WITH_SERVER)
710static
711int sh_write_select(int type, int sockfd,
712 char *buf, int nbytes,
713 int * w_error, int timeout)
714{
715 int countbytes, count;
716 fd_set fds;
717 struct timeval tv;
718 int select_now;
719 int num_sel;
720
721 struct sigaction new_act;
722 struct sigaction old_act;
723 char errbuf[SH_ERRBUF_SIZE];
724
725 SL_ENTER(_("sh_write_select"));
726
727 /* ignore SIGPIPE (instead get EPIPE if connection is closed)
728 */
729 new_act.sa_handler = SIG_IGN;
730 sigemptyset( &new_act.sa_mask ); /* set an empty mask */
731 new_act.sa_flags = 0; /* init sa_flags */
732 sigaction (SIGPIPE, &new_act, &old_act);
733
734 FD_ZERO(&fds);
735 FD_SET(sockfd, &fds);
736
737 countbytes = 0;
738 tv.tv_sec = 1;
739 tv.tv_usec = 0;
740 select_now = 0;
741
742 *w_error = 0;
743
744 while ( countbytes < nbytes ) {
745
746 FD_ZERO(&fds);
747 FD_SET(sockfd, &fds);
748
749 if (type == SH_DO_WRITE)
750 {
751 if ( (num_sel = select (sockfd+1, NULL, &fds, NULL, &tv)) == -1)
752 {
753 if (sig_raised == 1)
754 {
755 sig_raised = 2;
756 continue;
757 }
758 if ( errno == EINTR) /* try again */
759 continue;
760 *w_error = errno;
761 TPT(( 0, FIL__, __LINE__, _("msg=<select: %s>\n"),
762 sh_error_message(*w_error, errbuf, sizeof(errbuf))));
763 sigaction (SIGPIPE, &old_act, NULL);
764 SL_RETURN( countbytes, _("sh_write_select"));
765 }
766 }
767 else
768 {
769 if ( (num_sel = select (sockfd+1, &fds, NULL, NULL, &tv)) == -1)
770 {
771 if (sig_raised == 1)
772 {
773 sig_raised = 2;
774 continue;
775 }
776 if ( errno == EINTR ) /* try again */
777 continue;
778 *w_error = errno;
779 TPT(( 0, FIL__, __LINE__, _("msg=<select: %s>\n"),
780 sh_error_message(*w_error, errbuf, sizeof(errbuf))));
781 sigaction (SIGPIPE, &old_act, NULL);
782 SL_RETURN( countbytes, _("sh_write_select"));
783 }
784 }
785
786 /* on Linux, timeout is modified to reflect the amount of
787 * time not slept
788 */
789 tv.tv_sec = 1;
790 tv.tv_usec = 0;
791
792
793 /* let's not hang on forever
794 */
795 if (num_sel == 0)
796 {
797 ++select_now; /* timeout */
798 if ( select_now > timeout ) /* 5 minutes */
799 {
800#ifdef ETIMEDOUT
801 *w_error = ETIMEDOUT;
802#else
803 *w_error = 0;
804#endif
805 sigaction (SIGPIPE, &old_act, NULL);
806 TPT(( 0, FIL__, __LINE__, _("msg=<Timeout>\n")));
807 SL_RETURN( countbytes, _("sh_write_select"));
808 }
809 }
810
811 if ( FD_ISSET (sockfd, &fds) )
812 {
813 if (type == SH_DO_WRITE)
814 count = write (sockfd, buf, nbytes-countbytes);
815 else
816 count = read (sockfd, buf, nbytes-countbytes);
817
818 if (count > 0)
819 {
820 countbytes += count;
821 buf += count; /* move buffer pointer forward */
822 if (countbytes < nbytes) FD_SET( sockfd, &fds );
823 }
824 else if (count < 0 && errno == EINTR)
825 {
826 FD_SET( sockfd, &fds );
827 }
828 else if (count < 0)
829 {
830 *w_error = errno;
831 sigaction (SIGPIPE, &old_act, NULL);
832 TPT(( 0, FIL__, __LINE__, _("msg=<count < 0>\n")));
833 SL_RETURN( countbytes, _("sh_write_select"));
834 }
835 else /* count == 0 */
836 {
837 *w_error = errno;
838 sigaction (SIGPIPE, &old_act, NULL);
839 TPT(( 0, FIL__, __LINE__, _("msg=<count == 0>\n")));
840 SL_RETURN( countbytes, _("sh_write_select"));
841 }
842 }
843 }
844
845
846 /* restore signal handler
847 */
848 sigaction (SIGPIPE, &old_act, NULL);
849
850 *w_error = 0;
851
852 TPT(( 0, FIL__, __LINE__, _("msg=<count = %d>\n"), countbytes));
853 SL_RETURN( countbytes, _("sh_write_select"));
854}
855#endif
856
857#if defined (SH_WITH_CLIENT) || defined(SH_WITH_SERVER)
858unsigned long write_port (int sockfd, char *buf, unsigned long nbytes,
859 int * w_error, int timeout)
860{
861 unsigned long bytes;
862
863 SL_ENTER(_("write_port"));
864
865 bytes = sh_write_select(SH_DO_WRITE, sockfd, buf, nbytes, w_error, timeout);
866 if (*w_error != 0)
867 {
868 char errbuf[SH_ERRBUF_SIZE];
869 sh_error_handle((-1), FIL__, __LINE__, *w_error, MSG_TCP_NETRP,
870 sh_error_message (*w_error, errbuf, sizeof(errbuf)),
871 (long) sockfd, _("write_port"));
872 }
873 SL_RETURN( bytes, _("write_port"));
874}
875#endif
876
877#if defined(HAVE_NTIME) || defined(SH_WITH_CLIENT) || defined(SH_WITH_SERVER)
878
879unsigned long read_port (int sockfd, char *buf, unsigned long nbytes,
880 int * w_error, int timeout)
881{
882 unsigned long bytes;
883
884 SL_ENTER(_("read_port"));
885
886 bytes = sh_write_select(SH_DO_READ, sockfd, buf, nbytes, w_error, timeout);
887 if (*w_error != 0)
888 {
889 char errbuf[SH_ERRBUF_SIZE];
890 sh_error_handle((-1), FIL__, __LINE__, *w_error, MSG_TCP_NETRP,
891 sh_error_message (*w_error, errbuf, sizeof(errbuf)),
892 (long) sockfd, _("read_port"));
893 }
894 SL_RETURN( bytes, _("read_port"));
895}
896#endif
897
898#if defined(SH_WITH_CLIENT) || defined(SH_WITH_SERVER)
899
900int check_request_nerr (char * have, char * need)
901{
902 SL_ENTER(_("check_request_nerr"));
903 ASSERT_RET((have != NULL && need != NULL),
904 _("have != NULL && need != NULL"), (-1))
905
906 if ( (have[0] == need[0]) && (have[1] == need[1]) &&
907 (have[2] == need[2]) && (have[3] == need[3]))
908 SL_RETURN(0, _("check_request_nerr"));
909 SL_RETURN((-1), _("check_request_nerr"));
910}
911#endif
912
913#if defined (SH_WITH_CLIENT) || defined(SH_WITH_SERVER)
914
915int check_request (char * have, char * need)
916{
917 char first[21], second[5];
918 int i;
919
920 SL_ENTER(_("check_request"));
921 i = check_request_nerr (have, need);
922
923 if (i == 0)
924 SL_RETURN(0, _("check_request"));
925
926 for (i = 0; i < 4; ++i)
927 {
928 second[i] = need[i];
929 sprintf(&first[i*4], _("%c%03o"), /* known to fit */
930 '\\', (unsigned char) have[i]);
931 }
932
933 first[20] = '\0'; second[4] = '\0';
934
935 sh_error_handle((-1), FIL__, __LINE__, EINVAL, MSG_E_NETST,
936 second, first);
937 SL_RETURN((-1), _("check_request"));
938}
939#endif
940
941#if defined (SH_WITH_SERVER)
942
943int check_request_s (char * have, char * need, char * clt)
944{
945 char first[21], second[5];
946 int i;
947
948 SL_ENTER(_("check_request_s"));
949 i = check_request_nerr (have, need);
950
951 if (i == 0)
952 SL_RETURN( (0), _("check_request_s"));
953
954 for (i = 0; i < 4; ++i)
955 {
956 second[i] = need[i];
957 sprintf(&first[i*4], _("%c%03o"), /* known to fit */
958 '\\', (unsigned char) have[i]);
959 }
960 first[20] = '\0'; second[4] = '\0';
961 sh_error_handle((-1), FIL__, __LINE__, EINVAL, MSG_E_NETST1,
962 second, first, clt);
963 SL_RETURN( (-1), _("check_request_s"));
964}
965#endif
966
967#if defined (SH_WITH_CLIENT) || defined (SH_WITH_SERVER)
968
969void get_header (unsigned char * head, unsigned long * bytes, char * u)
970{
971 SL_ENTER(_("get_header"));
972
973 *bytes =
974 (256 * (unsigned int)head[1] + (unsigned int)head[2]);
975
976 if (u != NULL)
977 {
978 u[0] = head[3];
979 u[1] = head[4];
980 u[2] = head[5];
981 u[3] = head[6];
982 u[4] = '\0';
983 }
984
985 SL_RET0(_("get_header"));
986}
987#endif
988
989#if defined(SH_WITH_CLIENT) || defined(SH_WITH_SERVER)
990
991#ifdef SH_ENCRYPT_2
992#define TRANS_BYTES 65120
993#else
994#define TRANS_BYTES 65280
995#endif
996
997void put_header (unsigned char * head, int protocol,
998 unsigned long * length, char * u)
999{
1000
1001 /* static long transfer_limit = (8 * SH_BUFSIZE); V0.8 */
1002 static unsigned long transfer_limit = TRANS_BYTES + 6 + KEY_LEN;
1003
1004 SL_ENTER(_("put_header"));
1005
1006 head[0] = protocol;
1007
1008 ASSERT((*length < transfer_limit), _("*length < transfer_limit"))
1009
1010 if (*length > transfer_limit)
1011 *length = transfer_limit;
1012
1013 head[1] = (unsigned int)(*length/256);
1014 head[2] = (unsigned int)(*length-256 * head[1]);
1015 if (u == NULL)
1016 {
1017 head[3] = 0x01;
1018 head[4] = 0x01;
1019 head[5] = 0x01;
1020 head[6] = 0x01;
1021 }
1022 else
1023 {
1024 head[3] = u[0];
1025 head[4] = u[1];
1026 head[5] = u[2];
1027 head[6] = u[3];
1028 }
1029
1030 SL_RET0(_("put_header"));
1031}
1032#endif
1033
1034/* ------------------------------------------
1035 *
1036 * version 2 client/server protocol
1037 *
1038 * ------------------------------------------
1039 *
1040 * header : flag size[2]
1041 *
1042 * payload: random_pad[8] protocol[4] size[4] payload[payload_size] padding
1043 *
1044 * full_size <= 8192; payload_size <= 8176 (511*16); msg_size <= 8128 (508*16)
1045 * (msg_size = payload_size - key_len = payload_size - 48)
1046 */
1047
1048/*
1049 * only SH_V2_FULLSIZE is used, and only once
1050 */
1051#if 0
1052#ifdef SH_WITH_SERVER
1053#define SH_V2_FULLSIZE 240
1054#define SH_V2_PAYLOAD 224
1055#define SH_V2_MESSAGE 176
1056#else
1057#define SH_V2_FULLSIZE 1024
1058#define SH_V2_PAYLOAD 1008
1059#define SH_V2_MESSAGE 960
1060#endif
1061#endif
1062#define SH_V2_FULLSIZE 1024
1063
1064#ifdef SH_ENCRYPT
1065#include "rijndael-api-fst.h"
1066#endif
1067
1068void sh_tools_show_header (unsigned char * head, char sign)
1069{
1070#define SH_IS_ASCII(c) (((c) & ~0x7f) == 0)
1071
1072
1073 int msg_size = (256 * (unsigned int)head[1] + (unsigned int)head[2]);
1074 char code[32];
1075 char * p = &code[0];
1076
1077 memset (code, ' ', 32); /* space */
1078
1079 if ((head[0] & SH_PROTO_SRP) != 0) { p[0]='S';p[1]='R';p[2]='P';}
1080 p += 4;
1081 if ((head[0] & SH_PROTO_MSG) != 0) { p[0]='M';p[1]='S';p[2]='G';}
1082 p += 4;
1083 if ((head[0] & SH_PROTO_BIG) != 0) { p[0]='B';p[1]='I';p[2]='G';}
1084 p += 4;
1085 if ((head[0] & SH_PROTO_END) != 0) { p[0]='E';p[1]='N';p[2]='D';}
1086 p += 4;
1087 if ((head[0] & SH_PROTO_ENC) != 0) { p[0]='E';p[1]='N';p[2]='C';}
1088 p += 4;
1089 if ((head[0] & SH_PROTO_EN2) != 0) { p[0]='E';p[1]='N';p[2]='2';}
1090 code[23] = '\0';
1091
1092 if (SH_IS_ASCII(head[3]) && isalpha(head[3]) &&
1093 SH_IS_ASCII(head[4]) && isalpha(head[4]) &&
1094 SH_IS_ASCII(head[5]) && isalpha(head[5]) &&
1095 SH_IS_ASCII(head[6]) && isalpha(head[6])) {
1096 fprintf(stderr, "%c %3o %s %5d %c %c %c %c\n", sign,
1097 head[0], code, msg_size, head[3], head[4], head[5], head[6]);
1098 } else {
1099 fprintf(stderr, "%c %3o %s %5d %2X %2X %2X %2X\n", sign,
1100 head[0], code, msg_size, head[3], head[4], head[5], head[6]);
1101 }
1102 return;
1103}
1104
1105#ifdef SH_ENCRYPT
1106/*
1107 * #define DEBUG_EN2
1108 *
1109 * ingest version 1 7-byte header and payload, return version2 header/payload
1110 * last 4 bytes of outgoing header are set to dummy value
1111 */
1112char * sh_tools_makePack (unsigned char * header,
1113 char * payload, unsigned long payload_size,
1114 keyInstance * keyInstE)
1115{
1116 UINT32 rpad[3];
1117 unsigned char head[16];
1118 double epad;
1119 unsigned long i_epad = 0;
1120 unsigned long i_blk = payload_size / 16;
1121 unsigned long i_blkmax = SH_V2_FULLSIZE / 16;
1122 unsigned long pads = 0;
1123 size_t full_size;
1124 char * full_ret;
1125
1126 char * p;
1127 RIJ_BYTE inBlock[B_SIZ];
1128 RIJ_BYTE outBlock[B_SIZ];
1129 int j;
1130 cipherInstance cipherInst;
1131 int err_num;
1132 int blkfac;
1133 int oflow = 0;
1134
1135 /*
1136 SL_REQUIRE (i_blk*16 == payload_size, _("payload_size % 16 != 0"));
1137 */
1138 if ((i_blk * 16) != payload_size) ++i_blk;
1139#ifdef DEBUG_EN2
1140 fprintf(stderr, "SEND <%d> blocks <%d>\n", payload_size, i_blk);
1141#endif
1142 /* random_pad
1143 */
1144 rpad[1] = taus_get (&(skey->rng0[0]), &(skey->rng1[0]), &(skey->rng2[0]));
1145 memcpy (head, &rpad[1], 4);
1146 rpad[0] = taus_get (&(skey->rng0[0]), &(skey->rng1[0]), &(skey->rng2[0]));
1147 memcpy (&head[4], &rpad[0], 4);
1148 rpad[2] = taus_get (&(skey->rng0[0]), &(skey->rng1[0]), &(skey->rng2[0]));
1149 memcpy (&head[8], &rpad[2], 4);
1150
1151 /* protocol
1152 */
1153 /* memcpy (&head[8], &header[3], 4); */
1154
1155 /* size (payload)
1156 */
1157 head[12] = header[1];
1158 head[13] = header[2];
1159 head[14] = '\0';
1160 head[15] = '\0';
1161
1162 if (i_blk < i_blkmax)
1163 {
1164 pads = i_blkmax - i_blk;
1165 /* memcpy((char *) &rpad[2], &head[12], 4); */
1166 epad = taus_get_double (&rpad);
1167#ifdef DEBUG_EN2
1168 fprintf(stderr, "PAD1 <%d> <%f>\n", pads, epad);
1169#endif
1170 i_epad = (unsigned long) (pads * epad);
1171#ifdef DEBUG_EN2
1172 fprintf(stderr, "PAD2 <%d> <%d>\n", i_epad, (i_epad*16));
1173#endif
1174 }
1175
1176 full_size = 16; /* head */
1177 if (sl_ok_muls(i_blk, 16) && sl_ok_adds(full_size, (i_blk*16)))
1178 full_size = full_size + (i_blk*16); /* payload */
1179 else
1180 oflow = 1;
1181 if (sl_ok_adds(full_size, (i_epad*16)))
1182 full_size = full_size + (i_epad*16); /* pad */
1183 else
1184 i_epad = 0;
1185
1186 if (oflow)
1187 {
1188 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
1189 _("integer overflow"),
1190 _("sh_tools_makePack"));
1191 }
1192
1193 full_ret = SH_ALLOC(full_size);
1194 memcpy(full_ret, head, 16);
1195 if (payload != NULL && !oflow)
1196 {
1197 memcpy(&full_ret[16], payload, payload_size);
1198 }
1199 if ((i_blk*16) > payload_size && !oflow)
1200 {
1201#ifdef DEBUG_EN2
1202 fprintf(stderr, "SEN2 <%d>\n", (i_blk*16) - payload_size);
1203#endif
1204 memset(&full_ret[16+payload_size], '\0', (i_blk*16) - payload_size);
1205 payload_size = i_blk * 16;
1206 }
1207 memset(&full_ret[16+payload_size], '\0', i_epad*16);
1208#ifdef DEBUG_EN2
1209 fprintf(stderr, "SEN3 <%d> <%d>\n", full_size, i_epad*16);
1210#endif
1211
1212 /* rewrite header
1213 */
1214 header[1] = (unsigned int)(full_size/256);
1215 header[2] = (unsigned int)(full_size - (256 * header[1]));
1216 /* don't erase protocol from header
1217 memset(&header[3], '\0', 4);
1218 */
1219 p = full_ret; blkfac = full_size / 16;
1220
1221 err_num = cipherInit (&cipherInst, MODE_CBC, NULL);
1222
1223 if (err_num < 0)
1224 {
1225 char expbuf[SH_ERRBUF_SIZE];
1226 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
1227 errorExplain(err_num, expbuf, sizeof(expbuf)),
1228 _("sh_tools_makePack: cipherInit"));
1229 }
1230 for (j = 0; j < blkfac; ++j)
1231 {
1232 memcpy(inBlock, p, B_SIZ);
1233 err_num = blockEncrypt(&cipherInst, keyInstE,
1234 inBlock, 128 * BNUM, outBlock);
1235 if (err_num < 0)
1236 {
1237 char expbuf[SH_ERRBUF_SIZE];
1238 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
1239 errorExplain(err_num, expbuf, sizeof(expbuf)),
1240 _("sh_tools_makePack: blockEncrypt"));
1241 }
1242 memcpy(p, outBlock, B_SIZ);
1243 p += B_SIZ;
1244 }
1245
1246 return full_ret;
1247}
1248
1249/* write a 7-byte header and return payload as expected by version 1
1250 * last 4 bytes of incoming header are dummy
1251 */
1252char * sh_tools_revertPack (unsigned char * header, char * message,
1253 keyInstance * keyInstD,
1254 unsigned long message_size)
1255{
1256 unsigned long msg_size;
1257 char * msg_ret;
1258
1259 char * p;
1260 RIJ_BYTE inBlock[B_SIZ];
1261 RIJ_BYTE outBlock[B_SIZ];
1262 int j;
1263 cipherInstance cipherInst;
1264 int err_num;
1265 int blkfac;
1266 char expbuf[SH_ERRBUF_SIZE];
1267
1268 msg_size = (256 * (unsigned int)header[1] + (unsigned int)header[2]);
1269#ifdef DEBUG_EN2
1270 fprintf(stderr, "RECV <%lu>\n", msg_size);
1271#endif
1272 if (msg_size > message_size) {
1273 msg_size = message_size;
1274#ifdef DEBUG_EN2
1275 fprintf(stderr, "RECV TRUNC1 <%lu>\n", msg_size);
1276#endif
1277 }
1278
1279 p = message; blkfac = msg_size / 16;
1280
1281 err_num = cipherInit (&cipherInst, MODE_CBC, NULL);
1282
1283 if (err_num < 0)
1284 {
1285 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
1286 errorExplain(err_num, expbuf, sizeof(expbuf)),
1287 _("sh_tools_revertPack: cipherInit"));
1288 }
1289 for (j = 0; j < blkfac; ++j)
1290 {
1291 memcpy(inBlock, p, B_SIZ);
1292 err_num = blockDecrypt(&cipherInst, keyInstD,
1293 inBlock, 128 * BNUM, outBlock);
1294 if (err_num < 0)
1295 {
1296 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
1297 errorExplain(err_num, expbuf, sizeof(expbuf)),
1298 _("sh_tools_revertPack: blockDecrypt"));
1299 }
1300 memcpy(p, outBlock, B_SIZ);
1301 p += B_SIZ;
1302 }
1303
1304 /* rewrite size in header
1305 */
1306 header[1] = message[12];
1307 header[2] = message[13];
1308 msg_size = (256 * (unsigned int)header[1] + (unsigned int)header[2]);
1309
1310 if (msg_size > (message_size-16))
1311 {
1312 msg_size = message_size-16;
1313 header[1] = (unsigned int)(msg_size/256);
1314 header[2] = (unsigned int)(msg_size - (256 * header[1]));
1315#ifdef DEBUG_EN2
1316 fprintf(stderr, "RECV TRUNC2 <%lu>\n", msg_size);
1317#endif
1318 }
1319#ifdef DEBUG_EN2
1320 fprintf(stderr, "REC2 <%lu>\n", msg_size);
1321#endif
1322 /* protocol
1323 */
1324 /* memcpy(&header[3], &message[8], 4); */
1325
1326 /* payload
1327 */
1328 msg_ret = SH_ALLOC(msg_size+1);
1329 if (msg_size > 0)
1330 {
1331 memcpy(msg_ret, &message[16], msg_size);
1332 }
1333 msg_ret[msg_size] = '\0';
1334#ifdef DEBUG_EN2
1335 fprintf(stderr, "REC3 <%lu>\n", msg_size);
1336#endif
1337 SH_FREE(message);
1338
1339 return msg_ret;
1340}
1341#endif
1342
1343int sh_tools_hash_add(char * key, char * buf, int buflen)
1344{
1345 char * theSig;
1346
1347 SL_ENTER(_("sh_tools_hash_add"));
1348
1349 theSig = sh_util_siggen (key, buf, buflen);
1350 sl_strlcat(buf, theSig, buflen + KEY_LEN + 1);
1351
1352 SL_RETURN((0), _("sh_tools_hash_add"));
1353}
1354
1355
1356/* return 0 (== FALSE) if no match, else 1 (== TRUE)
1357 */
1358int sh_tools_hash_vfy(char * key, char * buf, int buflen)
1359{
1360 char hash[KEY_LEN+1];
1361 register int i;
1362 char * theSig;
1363
1364 SL_ENTER(_("sh_tools_hash_vfy"));
1365
1366 theSig = sh_util_siggen (key, buf, buflen);
1367 sl_strlcpy(hash, theSig, KEY_LEN+1);
1368
1369 for (i = 0; i < KEY_LEN; ++i)
1370 {
1371 if (buf[buflen + i] != hash[i])
1372 SL_RETURN((0), _("sh_tools_hash_vfy"));
1373 }
1374
1375 SL_RETURN((1), _("sh_tools_hash_vfy"));
1376}
1377
1378/* ------------------------------------------ */
1379
1380#if defined (SH_WITH_SERVER)
1381
1382/* add a checksum to a buffer; put checksum in front
1383 */
1384char * hash_me (char * key, char * buf, int buflen)
1385{
1386 char hash[KEY_LEN+1];
1387 char * temp = NULL;
1388 register int i;
1389 int total = 0;
1390 char * theSig;
1391
1392
1393 SL_ENTER(_("hash_me"));
1394
1395#ifdef DEBUG_EN2
1396 fprintf(stderr, "hash_me <%s> <%d>\n",
1397 (key == NULL) ? "NULL" : key, buflen);
1398#endif
1399 /* key = H(NSRV,NCLT,SK)
1400 */
1401 ASSERT_RET((key != NULL), _("key != NULL"), (NULL));
1402 ASSERT_RET((buflen >= 0), _("buflen >= 0"), (NULL));
1403
1404 theSig = sh_util_siggen (key, buf, buflen);
1405 sl_strlcpy(hash, theSig, KEY_LEN+1);
1406
1407 if (sl_ok_adds(buflen, KEY_LEN))
1408 {
1409 total = KEY_LEN + buflen;
1410 temp = SH_ALLOC (total);
1411
1412 for (i = 0; i < KEY_LEN; ++i)
1413 temp[i] = hash[i];
1414
1415 for (i = 0; i < buflen; ++i)
1416 temp[i+KEY_LEN] = buf[i];
1417 }
1418 else
1419 {
1420 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
1421 _("integer overflow"),
1422 _("hash_me"));
1423 temp = sh_util_strdup(buf);
1424 }
1425 SL_RETURN(temp, _("hash_me"));
1426}
1427#endif
1428
1429#if defined(SH_WITH_CLIENT) || defined(SH_WITH_SERVER)
1430
1431/* verify the checksum of a buffer; checksum comes first
1432 */
1433int hash_check(char * key,
1434 char * buf, int buflen)
1435{
1436 char hash[KEY_LEN+1];
1437 register int i;
1438 char * theSig;
1439
1440 SL_ENTER(_("hash_check"));
1441
1442#ifdef DEBUG_EN2
1443 fprintf(stderr, "hash_check <%s> <%d>\n",
1444 (key == NULL) ? "NULL" : key, buflen);
1445#endif
1446 theSig = sh_util_siggen (key, &buf[KEY_LEN], buflen-KEY_LEN);
1447 sl_strlcpy(hash, theSig, KEY_LEN+1);
1448
1449 for (i = 0; i < KEY_LEN; ++i)
1450 {
1451 if (buf[i] != hash[i])
1452 SL_RETURN((-1), _("hash_check"));
1453 }
1454 SL_RETURN((0), _("hash_check"));
1455}
1456
1457#endif
1458
1459#if defined (SH_WITH_SERVER)
1460
1461char * get_client_conf_file (char * peer, unsigned long * length)
1462{
1463 char * ret;
1464 int status;
1465 struct stat buf;
1466 char * base;
1467 size_t size;
1468
1469 SL_ENTER(_("get_client_conf_file"));
1470
1471 base = sh_util_strdup(DEFAULT_DATAROOT);
1472
1473 size = sl_strlen(base);
1474 if (sl_ok_adds(size, sl_strlen(peer)))
1475 size += sl_strlen(peer);
1476 if (sl_ok_adds(size, 6))
1477 size += 6;
1478
1479 ret = SH_ALLOC(size);
1480 sl_strlcpy(ret, base, size);
1481 sl_strlcat(ret, _("/rc."), size);
1482 sl_strlcat(ret, peer, size);
1483
1484 status = retry_stat (FIL__, __LINE__, ret, &buf);
1485
1486 if (status == 0)
1487 goto lab_end;
1488 else
1489 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, status, MSG_E_ACCESS,
1490 (long) sh.effective.uid, ret);
1491
1492 sl_strlcpy(ret, base, size);
1493 sl_strlcat(ret, "/rc", 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_ERR, FIL__, __LINE__, status, MSG_E_ACCESS,
1501 (long) sh.effective.uid, ret);
1502
1503 SH_FREE(base);
1504 SH_FREE(ret);
1505 *length=0;
1506 SL_RETURN(NULL, _("get_client_conf_file"));
1507
1508 lab_end:
1509 if (buf.st_size > 0x7fffffff)
1510 {
1511 sh_error_handle(SH_ERR_ERR, FIL__, __LINE__, status, MSG_E_SUBGEN,
1512 _("File too large"), _("get_client_conf_file"));
1513 SH_FREE(base);
1514 SL_RETURN(NULL, _("get_client_conf_file"));
1515 }
1516 *length = (unsigned long) buf.st_size;
1517 SH_FREE(base);
1518 SL_RETURN(ret, _("get_client_conf_file"));
1519}
1520
1521char * get_client_data_file (char * peer, unsigned long * length)
1522{
1523 char * ret;
1524 int status;
1525 struct stat buf;
1526
1527 char * base;
1528 size_t size;
1529
1530 SL_ENTER(_("get_client_data_file"));
1531
1532 base = sh_util_strdup(DEFAULT_DATAROOT);
1533
1534 size = sl_strlen(base);
1535 if (sl_ok_adds(size, sl_strlen(peer)))
1536 size += sl_strlen(peer);
1537 if (sl_ok_adds(size, 8))
1538 size += 8;
1539
1540 ret = SH_ALLOC(size);
1541 sl_strlcpy(ret, base, size);
1542 sl_strlcat(ret, _("/file."), size);
1543 sl_strlcat(ret, peer, size);
1544
1545 status = retry_stat (FIL__, __LINE__, ret, &buf);
1546
1547 if (status == 0)
1548 goto lab1_end;
1549 else
1550 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, status, MSG_E_ACCESS,
1551 (long) sh.effective.uid, ret);
1552
1553
1554 sl_strlcpy(ret, base, size);
1555 sl_strlcat(ret, _("/file"), size);
1556
1557 status = retry_stat (FIL__, __LINE__, ret, &buf);
1558
1559 if (status == 0)
1560 goto lab1_end;
1561 else
1562 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, status, MSG_E_ACCESS,
1563 (long) sh.effective.uid, ret);
1564
1565
1566 *length = 0;
1567 SH_FREE(base);
1568 SH_FREE(ret);
1569 SL_RETURN(NULL, _("get_client_data_file"));
1570
1571 lab1_end:
1572 if (buf.st_size > 0x7fffffff)
1573 {
1574 sh_error_handle(SH_ERR_ERR, FIL__, __LINE__, status, MSG_E_SUBGEN,
1575 _("File too large"), _("get_client_data_file"));
1576 SH_FREE(base);
1577 SL_RETURN(NULL, _("get_client_data_file"));
1578 }
1579 *length = (unsigned long) buf.st_size;
1580 SH_FREE(base);
1581 SL_RETURN(ret, _("get_client_data_file"));
1582
1583}
1584#endif
1585
1586#if defined(SH_WITH_CLIENT) || defined(SH_WITH_SERVER) || defined(SH_STEALTH) || defined(WITH_GPG) || defined(WITH_PGP)
1587
1588/* --------- secure temporary file ------------ */
1589
1590SL_TICKET open_tmp ()
1591{
1592 SL_TICKET fd;
1593 UINT32 ticks;
1594 char * file;
1595 struct stat buf;
1596 int error;
1597 int status = BAD;
1598 char * my_tmp_dir;
1599
1600 SL_ENTER(_("open_tmp"));
1601
1602#if defined(SH_TMPDIR)
1603 my_tmp_dir = sh_util_strdup(SH_TMPDIR);
1604#else
1605#if defined(SH_WITH_SERVER)
1606 my_tmp_dir = sh_util_strdup(DEFAULT_LOGDIR);
1607#else
1608 my_tmp_dir = sh_util_strdup(sh.effective.home);
1609#endif
1610#endif
1611
1612 if (0 != tf_trust_check (my_tmp_dir, SL_YESPRIV))
1613 {
1614 dlog(1, FIL__, __LINE__,
1615 _("The directory for temporary files: %s is untrusted, i.e. an\nuntrusted user owns or can write to some directory in the path.\n"),
1616 my_tmp_dir);
1617 sh_error_handle ((-1), FIL__, __LINE__, EACCES, MSG_TRUST,
1618 (long) sh.effective.uid,
1619 my_tmp_dir);
1620 SH_FREE(my_tmp_dir);
1621 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
1622 }
1623
1624 do {
1625
1626 /* create random filename in effective users home directory
1627 */
1628 ticks = taus_get (&(skey->rng0[0]), &(skey->rng1[0]), &(skey->rng2[0]));
1629 if (my_tmp_dir[0] == '/' && my_tmp_dir[1] == '\0')
1630 file = sh_util_strconcat (my_tmp_dir,
1631 sh_tiger_hash( (char *) &ticks, TIGER_DATA, 4),
1632 NULL);
1633 else
1634 file = sh_util_strconcat (my_tmp_dir,
1635 "/",
1636 sh_tiger_hash( (char *) &ticks, TIGER_DATA, 4),
1637 NULL);
1638
1639 /* check whether it already exists (paranoia)
1640 */
1641 errno = 0;
1642 status = retry_lstat(FIL__, __LINE__, file, &buf);
1643 error = errno;
1644
1645 if ( (status < 0) && (error == ENOENT) ) /* file does not exist */
1646 status = GOOD;
1647 else if (status < 0) /* unexpected error condition */
1648 {
1649 SH_FREE (file);
1650 SH_FREE(my_tmp_dir);
1651 TPT(( 0, FIL__, __LINE__, _("msg=<Unexpected error %d>\n"), error));
1652 SL_RETURN((-1), _("open_tmp"));
1653 }
1654 else /* file exists */
1655 {
1656 status = BAD;
1657 TPT(( 0, FIL__, __LINE__, _("msg=<Temporary file exists already>\n")));
1658 }
1659
1660 if (status == GOOD)
1661 {
1662 if (0 == tf_trust_check (file, SL_YESPRIV))
1663 status = GOOD;
1664 else
1665 {
1666 status = BAD;
1667 TPT(( 0, FIL__, __LINE__, _("msg=<Temporary file untrusted>\n")));
1668 }
1669 }
1670
1671 if (status == BAD)
1672 SH_FREE (file);
1673
1674 } while (status == BAD);
1675
1676 fd = sl_open_safe_rdwr (file, SL_YESPRIV);
1677 if (SL_ISERROR(fd))
1678 {
1679 sh_error_handle(SH_ERR_ALL, FIL__, __LINE__, fd, MSG_E_SUBGEN,
1680 _("Error opening temporary file"), _("open_tmp"));
1681 TPT(( 0, FIL__, __LINE__, _("msg=<Error %d temporary file %s>\n"),
1682 fd, file));
1683 }
1684
1685
1686 SH_FREE (file);
1687 SH_FREE(my_tmp_dir);
1688
1689 if (!SL_ISERROR(fd)) {
1690 sl_unlink(fd);
1691 }
1692
1693 if (!SL_ISERROR(fd))
1694 SL_RETURN((fd), _("open_tmp"));
1695 else
1696 SL_RETURN((-1), _("open_tmp"));
1697}
1698
1699
1700int close_tmp (SL_TICKET fd)
1701{
1702 SL_ENTER(_("close_tmp"));
1703
1704 if (SL_ISERROR(sl_close (fd)))
1705 SL_RETURN((-1), _("close_tmp"));
1706 SL_RETURN((0), _("close_tmp"));
1707}
1708
1709int rewind_tmp (SL_TICKET fd)
1710{
1711 SL_ENTER(_("rewind_tmp"));
1712
1713 if (SL_ISERROR(sl_rewind (fd)))
1714 SL_RETURN((-1), _("rewind_tmp"));
1715 SL_RETURN((0), _("rewind_tmp"));
1716}
1717#endif
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