source: trunk/src/sh_forward.c@ 236

Last change on this file since 236 was 225, checked in by katerina, 16 years ago

Fix for ticket #150 (flawed input verification in SRP). Release 2.5.4
File size: 145.8 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#include <string.h>
23#include <stdio.h>
24#include <stdlib.h>
25
26
27/* Must be early on FreeBSD
28 */
29#include <sys/types.h>
30
31/* must be .le. than (1020 * 64)
32 * (see sh_tools.c -- put_header)
33 *
34 * also: must be (N * 16), otherwise
35 * binary files cannot be transferred encrypted
36 *
37 * 65280 = (1020*64)
38 * #define TRANS_BYTES 8000 V0.8
39 */
40#ifdef SH_ENCRYPT_2
41#define TRANS_BYTES 65120
42#else
43#define TRANS_BYTES 65280
44#endif
45
46/* timeout for session key
47 */
48#define TIMEOUT_KEY 7200
49
50/* max time between connection attempts
51 */
52#define TIMEOUT_CON 2048
53
54/* #undef SRP_DEBUG */
55/* #define SRP_DEBUG */
56
57#ifdef HAVE_MEMORY_H
58#include <memory.h>
59#endif
60
61#if TIME_WITH_SYS_TIME
62#include <sys/time.h>
63#include <time.h>
64#else
65#if HAVE_SYS_TIME_H
66#include <sys/time.h>
67#else
68#include <time.h>
69#endif
70#endif
71
72/*
73#ifdef TM_IN_SYS_TIME
74#include <sys/time.h>
75#else
76#include <time.h>
77#endif
78*/
79
80#ifdef HAVE_SYS_SELECT_H
81#include <sys/select.h>
82#endif
83
84#ifdef HAVE_UNISTD_H
85#include <errno.h>
86#include <signal.h>
87#include <setjmp.h>
88#include <pwd.h>
89#include <grp.h>
90#include <sys/stat.h>
91#include <sys/resource.h>
92#include <fcntl.h>
93#include <sys/wait.h>
94#include <unistd.h>
95#endif
96
97#ifndef FD_SET
98#define NFDBITS 32
99#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
100#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
101#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
102#endif /* !FD_SET */
103#ifndef FD_SETSIZE
104#define FD_SETSIZE 32
105#endif
106#ifndef FD_ZERO
107#define FD_ZERO(p) memset((char *)(p), '\0', sizeof(*(p)))
108#endif
109
110#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
111#include <sys/mman.h>
112#endif
113
114
115#include <netdb.h>
116#include <sys/types.h>
117#include <netinet/in.h>
118#include <sys/socket.h>
119#ifndef S_SPLINT_S
120#include <arpa/inet.h>
121#endif
122
123#include "samhain.h"
124#include "sh_tiger.h"
125#include "sh_utils.h"
126#include "sh_unix.h"
127#include "sh_forward.h"
128#include "sh_srp.h"
129#include "sh_fifo.h"
130#include "sh_tools.h"
131#include "sh_entropy.h"
132#include "sh_html.h"
133#include "sh_nmail.h"
134#include "sh_socket.h"
135#define SH_NEED_GETHOSTBYXXX
136#include "sh_static.h"
137
138#ifdef SH_ENCRYPT
139#include "rijndael-api-fst.h"
140char * sh_tools_makePack (unsigned char * header,
141 char * payload, unsigned long payload_size,
142 keyInstance * keyInstE);
143char * sh_tools_revertPack (unsigned char * header, char * message,
144 keyInstance * keyInstE,
145 unsigned long message_size);
146#endif
147
148/* define this if you want to debug the client/server communication */
149/* #define SH_DBG_PROT 1 */
150
151#ifdef SH_DBG_PROT
152#define SH_SHOWPROT(c,d) sh_tools_show_header((c), (d))
153#else
154#define SH_SHOWPROT(c,d)
155#endif
156
157/* the port client will be connecting to
158 */
159#ifndef SH_DEFAULT_PORT
160#define SH_DEFAULT_PORT 49777
161#endif
162
163#ifndef SH_SELECT_REPEAT
164#define SH_SELECT_REPEAT 60
165#endif
166
167#ifndef SH_HEADER_SIZE
168#define SH_HEADER_SIZE 7
169#endif
170
171#ifndef SH_CHALLENGE_SIZE
172#define SH_CHALLENGE_SIZE 9
173#endif
174
175#undef FIL__
176#define FIL__ _("sh_forward.c")
177
178int clt_class = (-1);
179
180extern int flag_err_debug;
181extern int flag_err_info;
182
183#ifndef SH_STANDALONE
184
185#if defined(WITH_TRACE) || defined(WITH_TPT)
186char * hu_trans(const char * ihu)
187{
188 static char ohu[17];
189 sprintf(ohu, _("%c%03o"), '\\', /* known to fit */
190 (unsigned char) ihu[0]);
191 sprintf(&(ohu[4]), _("%c%03o"), '\\', /* known to fit */
192 (unsigned char) ihu[1]);
193 sprintf(&(ohu[8]), _("%c%03o"), '\\', /* known to fit */
194 (unsigned char) ihu[2]);
195 sprintf(&(ohu[12]), _("%c%03o"), '\\', /* known to fit */
196 (unsigned char) ihu[3]);
197 ohu[16] = '\0';
198 return ohu;
199}
200#endif
201
202static int StripDomain = S_TRUE;
203
204int sh_forward_set_strip (const char * str)
205{
206 static int fromcl = 0;
207 char dummy[2] = "F";
208
209 if (fromcl == 1)
210 return 0;
211
212 if (str == NULL)
213 {
214 fromcl = 1;
215 return (sh_util_flagval(dummy, &StripDomain));
216 }
217 else
218 return (sh_util_flagval(str, &StripDomain));
219}
220
221#include <ctype.h>
222
223const char * sh_strip_domain (char *name)
224{
225 char * first;
226 static char name_2[SH_MINIBUF+1];
227 register int i = 0;
228
229 SL_ENTER(_("sh_strip_domain"));
230
231 if (StripDomain == S_FALSE || (first = strchr(name, '.')) == NULL)
232 {
233 SL_RETURN( name, _("sh_strip_domain"));
234 }
235 else
236 {
237
238 /* check whether it is in dotted number format
239 * --> last part must be kept
240 */
241 if (0 != is_numeric(name))
242 {
243 SL_RETURN( name, _("sh_strip_domain"));
244 /*
245 i = sl_strlen(name) - 1;
246 while (name[i] != '.' && i >= 0)
247 --i;
248 if (name[i] == '.') ++i;
249 sl_strlcpy( name_2, &name[i], SH_MINIBUF +1 );
250 */
251 }
252 else
253 {
254 first = name;
255 while (i < SH_MINIBUF && *first != '.' && *first != '\0')
256 {
257 name_2[i] = *first;
258 ++first; ++i;
259 }
260 name_2[i] = '\0';
261 }
262 }
263
264 SL_RETURN( name_2, _("sh_strip_domain"));
265}
266
267/* #ifndef SH_STANDALONE */
268#endif
269
270#ifndef USE_SRP_PROTOCOL
271static
272void sh_passwd (char * salt, char * password, char * nounce, char *hash)
273{
274
275 char *combi;
276 size_t len;
277 register int i;
278 unsigned char * dez = NULL;
279 char hashbuf[KEYBUF_SIZE];
280
281 if (password == NULL)
282 dez = (unsigned char *) &(skey->pw[0]);
283 else if (sl_strlen(password) < PW_LEN)
284 {
285 fprintf(stderr, _("Password has less than %d chars !\n"),
286 PW_LEN);
287 _exit(EXIT_FAILURE);
288 }
289
290 if (password == NULL)
291 {
292 /* --- copy password ---
293 */
294 for (i = 0; i < PW_LEN; ++i)
295 {
296 skey->vernam[i] = (char)(*dez);
297 ++dez;
298 }
299 (void) sl_strlcpy (skey->vernam,
300 sh_tiger_hash(skey->vernam, TIGER_DATA, PW_LEN,
301 hashbuf, sizeof(hashbuf)),
302 KEY_LEN+1);
303 }
304 else
305 {
306 (void) sl_strlcpy (skey->vernam, password, KEY_LEN+1);
307 }
308
309 len = sl_strlen(salt) + 1;
310 if (sl_ok_adds(len, sl_strlen(skey->vernam)))
311 len += sl_strlen(skey->vernam);
312 if (nounce != NULL && sl_ok_adds(len, sl_strlen(nounce)))
313 len += sl_strlen(nounce);
314
315 /* H(s,P)
316 */
317 combi = SH_ALLOC(len);
318 (void) sl_strlcpy (combi, salt, len);
319 (void) sl_strlcat (combi, skey->vernam, len);
320 if (nounce != NULL)
321 (void) sl_strlcat (combi, nounce, len);
322 (void) sl_strlcpy (hash,
323 sh_tiger_hash(combi, TIGER_DATA,
324 (unsigned long) sl_strlen(combi),
325 hashbuf, sizeof(hashbuf)),
326 KEY_LEN+1);
327
328 /*
329 fprintf(stderr, "DD: A: <%s>\n", salt);
330 fprintf(stderr, "DD: P: <%s>\n", skey->pw);
331 fprintf(stderr, "DD: V: <%s>\n", skey->vernam);
332 fprintf(stderr, "DD: C: <%s>\n", combi);
333 fprintf(stderr, "DD: H: <%s>\n", hash);
334 */
335
336 SH_FREE (combi);
337 hash[KEY_LEN] = '\0';
338 return;
339}
340#endif
341
342#if defined(SH_WITH_CLIENT) || defined(SH_WITH_SERVER)
343
344static int count_dev_server = 0;
345
346void reset_count_dev_server(void)
347{
348 count_dev_server = 0;
349 return;
350}
351
352int sh_forward_setlogserver (const char * address)
353{
354 SL_ENTER(_("sh_forward_setlogserver"));
355
356 if (address != NULL && count_dev_server < 2
357 && sl_strlen(address) < SH_PATHBUF && sl_strlen(address) > 0)
358 {
359 if (count_dev_server == 0)
360 (void) sl_strlcpy (sh.srvexport.name, address, SH_PATHBUF);
361 else
362 (void) sl_strlcpy (sh.srvexport.alt, address, SH_PATHBUF);
363
364 ++count_dev_server;
365 SL_RETURN (0, _("sh_forward_setlogserver"));
366 }
367 SL_RETURN (-1, _("sh_forward_setlogserver"));
368}
369
370static
371int sh_forward_send_intern (int mysocket, char protocol, char * micro,
372 char * msgbuf, unsigned long length, int docrypt)
373{
374 unsigned long numbytes, countbytes;
375 int flag_err = 0;
376 unsigned char head[SH_HEADER_SIZE];
377 char * outbuf;
378
379#ifdef SH_ENCRYPT
380
381 unsigned long blkfac;
382 int rem;
383 unsigned long length2;
384 char * msg2buf = NULL;
385 char * p, * q;
386 RIJ_BYTE inBlock[B_SIZ];
387 RIJ_BYTE outBlock[B_SIZ];
388 unsigned long j;
389 cipherInstance cipherInst;
390 int err_num;
391 char expbuf[SH_ERRBUF_SIZE];
392#else
393 docrypt = SL_FALSE; /* dummy to fix compiler warning */
394#endif
395
396 SL_ENTER(_("sh_forward_send_intern"));
397
398#ifdef SH_ENCRYPT
399 if ((S_TRUE == docrypt) && ((protocol & SH_PROTO_EN2) != (char)0))
400 {
401 put_header (head, (int)protocol, &length, micro);
402 msg2buf = sh_tools_makePack (head, msgbuf, length,
403 &(skey->keyInstE));
404 /*@-usedef@*/
405 length = (unsigned long) (256 * (unsigned int)head[1] +
406 (unsigned int)head[2]);
407 /*@+usedef@*/
408 outbuf = msg2buf;
409 }
410 else if ((S_TRUE == docrypt) && ((protocol & SH_PROTO_ENC) != (char)0))
411 {
412 blkfac = length/B_SIZ;
413 rem = (int) (length - (B_SIZ * blkfac));
414 length2 = (B_SIZ * blkfac);
415 if ((rem > 0) && (length2+B_SIZ) > length2)
416 length2 += B_SIZ;
417 else
418 rem = 0;
419
420 msg2buf = SH_ALLOC((size_t)length2);
421 p = msgbuf;
422 q = msg2buf;
423
424 err_num = cipherInit (&cipherInst, (RIJ_BYTE)MODE_CBC, NULL);
425
426 if (err_num < 0)
427 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
428 errorExplain(err_num, expbuf, sizeof(expbuf)),
429 _("sh_forward_send_intern: cipherInit"));
430
431
432 for (j = 0; j < blkfac; ++j)
433 {
434 memcpy(inBlock, p, B_SIZ);
435 err_num = blockEncrypt(&cipherInst, &(skey->keyInstE),
436 inBlock, 128 * BNUM, outBlock);
437 if (err_num < 0)
438 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
439 errorExplain(err_num, expbuf, sizeof(expbuf)),
440 _("sh_forward_send_intern: blockEncrypt"));
441 memcpy(q, outBlock, B_SIZ);
442 p += B_SIZ;
443 q += B_SIZ;
444 }
445 if (rem > 0)
446 {
447 memset(inBlock, 0, B_SIZ);
448 memcpy(inBlock, p, (size_t)rem);
449 err_num = blockEncrypt(&cipherInst, &(skey->keyInstE),
450 inBlock, 128 * BNUM, outBlock);
451 if (err_num < 0)
452 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
453 errorExplain(err_num, expbuf, sizeof(expbuf)),
454 _("sh_forward_send_intern: blockEncrypt"));
455 memcpy(q, outBlock, B_SIZ);
456 q += B_SIZ;
457 }
458
459 outbuf = msg2buf;
460 length = length2;
461 put_header (head, (int)protocol, &length, micro);
462 }
463 else
464 {
465 outbuf = msgbuf;
466 put_header (head, (int)protocol, &length, micro);
467 }
468#else
469 outbuf = msgbuf;
470 put_header (head, (int)protocol, &length, micro);
471#endif
472
473 SH_SHOWPROT(head,'>');
474
475 numbytes = SH_HEADER_SIZE;
476 countbytes = write_port (mysocket,
477 (char *) head, numbytes,
478 &flag_err, 300);
479
480 if (countbytes == numbytes && outbuf != NULL)
481 {
482 numbytes = (length);
483 countbytes = write_port (mysocket,
484 outbuf, numbytes,
485 &flag_err, 300);
486 }
487
488#ifdef SH_ENCRYPT
489 /*@-usedef@*/
490 if (msg2buf != NULL)
491 SH_FREE(msg2buf);
492 /*@+usedef@*/
493#endif
494
495 if (countbytes == numbytes)
496 {
497 SL_RETURN( 0, _("sh_forward_send_intern"));
498 }
499 else
500 {
501 SL_RETURN( flag_err, _("sh_forward_send_intern"));
502 }
503}
504static
505int sh_forward_send (int mysocket, char protocol, char * micro,
506 char * msgbuf, unsigned long length)
507{
508 int i;
509 SL_ENTER(_("sh_forward_send"));
510 TPT(( 0, FIL__, __LINE__, _("msg=<Send.>\n")));
511 i = sh_forward_send_intern (mysocket, protocol, micro,
512 msgbuf, length, S_FALSE);
513 SL_RETURN(i, _("sh_forward_send"));
514}
515static
516int sh_forward_send_crypt (int mysocket, char protocol, char * micro,
517 char * msgbuf, unsigned long length)
518{
519 int i;
520 SL_ENTER(_("sh_forward_send_crypt"));
521#ifdef SH_ENCRYPT
522 TPT(( 0, FIL__, __LINE__, _("msg=<Send encrypted.>\n")));
523#else
524 TPT(( 0, FIL__, __LINE__, _("msg=<Send.>\n")));
525#endif
526 i = sh_forward_send_intern (mysocket, protocol, micro,
527 msgbuf, length, S_TRUE);
528 SL_RETURN(i, _("sh_forward_send_crypt"));
529}
530
531
532/* receive answer, add a trailing NULL to terminate string
533 * rev 0.8
534 */
535static
536long sh_forward_receive_intern (int mysocket, char protocol, char * micro,
537 char * msgbuf, unsigned long length,
538 int docrypt)
539{
540 unsigned long numbytes, countbytes;
541 int flag_err = -1;
542 unsigned char head[SH_HEADER_SIZE];
543
544#ifdef SH_ENCRYPT
545
546 unsigned long head_length;
547 unsigned long blkfac;
548 /* unsigned long length2; */
549 char * p, * q, * tmp;
550 RIJ_BYTE inBlock[B_SIZ];
551 RIJ_BYTE outBlock[B_SIZ];
552 unsigned long j;
553 cipherInstance cipherInst;
554 int err_num;
555 char expbuf[SH_ERRBUF_SIZE];
556#else
557 docrypt = SL_FALSE; /* dummy to fix compiler warning */
558#endif
559
560 SL_ENTER(_("sh_forward_receive_intern"));
561
562#ifdef SH_ENCRYPT
563 /* make sure length is not multiple of B_SIZ, see below
564 */
565 ASSERT_RET((length % B_SIZ != 0), _("length % 16 != 0"), flag_err);
566#endif
567
568 if (micro != NULL)
569 micro[4] = '\0';
570
571 if (msgbuf != NULL)
572 msgbuf[0] = '\0';
573
574 numbytes = SH_HEADER_SIZE;
575 countbytes = read_port (mysocket,
576 (char *) head, numbytes,
577 &flag_err, 300);
578
579 if (countbytes != numbytes)
580 {
581 TPT(( 0, FIL__, __LINE__, _("msg=<countbytes != numbytes>\n")));
582 SL_RETURN(flag_err, _("sh_forward_receive_intern"));
583 }
584 /*@-usedef +ignoresigns@*/
585 else if (head[0] != protocol &&
586 (head[0] & SH_PROTO_SRP) == (char)0 /* not set */)
587 {
588 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_MISMATCH);
589 SL_RETURN((-1), _("sh_forward_receive_intern"));
590 }
591 /*@+usedef -ignoresigns@*/
592 else
593 {
594 get_header (head, &numbytes, micro);
595 SH_SHOWPROT(head, '<');
596
597 if (numbytes > 0)
598 {
599 numbytes = (numbytes > length ? length : numbytes);
600
601 countbytes = read_port (mysocket,
602 msgbuf, numbytes,
603 &flag_err, 300);
604
605 if (countbytes < length)
606 msgbuf[countbytes] = '\0';
607 else
608 msgbuf[length-1] = '\0';
609
610 if (flag_err != 0)
611 {
612 TPT(( 0, FIL__, __LINE__, _("msg=<read error>\n")));
613 SL_RETURN((-1), _("sh_forward_receive_intern"));
614 }
615 }
616 }
617
618#ifdef SH_ENCRYPT
619 if ((S_TRUE == docrypt) && ((protocol & SH_PROTO_EN2) != (char)0))
620 {
621 tmp = SH_ALLOC((size_t)length);
622 memcpy(tmp, msgbuf, (size_t)length);
623 tmp = sh_tools_revertPack (head, tmp, &(skey->keyInstD), countbytes);
624
625 head_length = (unsigned long) (256 * (unsigned int)head[1] +
626 (unsigned int)head[2]);
627
628 /*
629 * revertPack returns header with length <= (original_length-16), so
630 * the following msgbuf[length] = '\0' is always safe.
631 * Nevertheless, check for proper length.
632 */
633 if (head_length <= (length-1))
634 length = head_length;
635 else
636 --length;
637
638 memcpy(msgbuf, tmp, (size_t)length);
639 msgbuf[length] = '\0';
640 SH_FREE(tmp);
641 if (countbytes == numbytes)
642 {
643 countbytes = length; /* to avoid error on return, see below */
644 }
645 numbytes = length;
646 }
647 else if ((S_TRUE == docrypt) && ((protocol & SH_PROTO_ENC) != (char)0))
648 {
649 /* Decrypt only complete blocks. If there is an incomplete block,
650 * something is wrong anyway.
651 * Decrypt in place.
652 */
653 blkfac = countbytes/B_SIZ;
654
655 p = msgbuf;
656 q = msgbuf;
657
658 err_num = cipherInit (&cipherInst, (RIJ_BYTE)MODE_CBC, NULL);
659
660 if (err_num < 0)
661 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
662 errorExplain(err_num, expbuf, sizeof(expbuf)),
663 _("sh_forward_receive_intern: cipherInit"));
664
665 /* here we want to have (length % B_SIZ != 0), such that the
666 * terminating '\0' cannot be overwritten
667 */
668 for (j = 0; j < blkfac; ++j)
669 {
670 memcpy(inBlock, p, B_SIZ);
671 err_num = blockDecrypt(&cipherInst, &(skey->keyInstD),
672 inBlock, 128 * BNUM, outBlock);
673 if (err_num < 0)
674 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
675 errorExplain(err_num, expbuf, sizeof(expbuf)),
676 _("sh_forward_receive_intern: blockDecrypt"));
677 memcpy(q, outBlock, B_SIZ);
678 p += B_SIZ;
679 q += B_SIZ;
680 }
681 }
682#endif
683
684 if (countbytes == numbytes)
685 {
686 SL_RETURN(((long)numbytes), _("sh_forward_receive_intern"));
687 }
688 else
689 {
690 TPT(( 0, FIL__, __LINE__, _("msg=<short read>\n")));
691 SL_RETURN(flag_err, _("sh_forward_receive_intern"));
692 }
693}
694
695static
696long sh_forward_receive (int mysocket, char protocol, char * micro,
697 char * msgbuf, unsigned long length)
698{
699 long i;
700 SL_ENTER(_("sh_forward_receive"));
701 TPT(( 0, FIL__, __LINE__, _("msg=<Receive.>\n")));
702 i = sh_forward_receive_intern (mysocket, protocol, micro,
703 msgbuf, length, S_FALSE);
704 SL_RETURN(i, _("sh_forward_receive"));
705}
706
707static
708long sh_forward_receive_crypt (int mysocket, char protocol, char * micro,
709 char * msgbuf, unsigned long length)
710{
711 long i;
712 SL_ENTER(_("sh_forward_receive_crypt"));
713#ifdef SH_ENCRYPT
714 TPT(( 0, FIL__, __LINE__, _("msg=<Receive encrypted.>\n")));
715#else
716 TPT(( 0, FIL__, __LINE__, _("msg=<Receive.>\n")));
717#endif
718 i = sh_forward_receive_intern (mysocket, protocol, micro,
719 msgbuf, length, S_TRUE);
720 SL_RETURN(i, _("sh_forward_receive"));
721}
722
723/**************************************************
724 *
725 *
726 * C L I E N T
727 *
728 *
729 ***************************************************/
730
731
732#include <time.h>
733
734static SH_FIFO * fifo = NULL;
735
736static long sh_forward_try (char * errmsg);
737
738static unsigned int ServerPort = SH_DEFAULT_PORT;
739
740int sh_forward_server_port (const char * str)
741{
742 unsigned long l;
743 char * endptr;
744
745 SL_ENTER(_("sh_forward_server_port"));
746
747 l = strtoul (str, &endptr, 0);
748 if (l > 65535 || endptr == str)
749 {
750 SL_RETURN (-1, _("sh_forward_server_port"));
751 }
752 ServerPort = (unsigned int) l;
753 SL_RETURN (0, _("sh_forward_server_port"));
754}
755
756long sh_forward (char * errmsg)
757{
758 static int have_server = GOOD;
759 long status;
760 char * popmsg;
761 static int failed = GOOD;
762
763 SL_ENTER(_("sh_forward"));
764
765 /* --- No log server available. ---
766 */
767 if (have_server == GOOD && sh.srvexport.name[0] == '\0')
768 {
769 have_server = BAD;
770 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_NONAME);
771 SL_RETURN (-1, _("sh_forward"));
772 }
773 else if (have_server == BAD)
774 {
775 SL_RETURN (-1, _("sh_forward"));
776 }
777
778 /* --- Allocate fifo. ---
779 */
780 if (fifo == NULL)
781 {
782 fifo = SH_ALLOC(sizeof(SH_FIFO));
783 fifo_init(fifo);
784 }
785
786 /* --- Check for messages on the queue, and send them first. ---
787 */
788 while (NULL != (popmsg = pop_list(fifo)) )
789 {
790 status = sh_forward_try (popmsg);
791 if (status != 0)
792 {
793 (void) push_tail_list (fifo, popmsg, 0, NULL);
794 SH_FREE(popmsg);
795 if (SH_FIFO_MAX == push_list (fifo, errmsg, 0,NULL))
796 {
797 SL_RETURN (-2, _("sh_forward"));
798 }
799 SL_RETURN (-1, _("sh_forward"));
800 }
801 SH_FREE(popmsg);
802 }
803
804 /* --- Now send the error message. ---
805 */
806 status = sh_forward_try (errmsg);
807 if (status != 0)
808 {
809 if (failed == GOOD)
810 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_SRV_FAIL,
811 _("log server"),
812 sh.srvexport.name);
813 failed = BAD;
814 if (SH_FIFO_MAX == push_list (fifo, errmsg, 0, NULL))/* push on stack */
815 {
816 SL_RETURN (-2, _("sh_forward"));
817 }
818 SL_RETURN (-1, _("sh_forward"));
819 }
820
821 failed = GOOD;
822 SL_RETURN (0, _("sh_forward"));
823}
824
825static long sh_forward_try_impl (char * errmsg, char what);
826
827static long sh_forward_try (char * errmsg)
828{
829 long i;
830 SL_ENTER(_("sh_forward_try"));
831 i = sh_forward_try_impl (errmsg, (char)SH_PROTO_MSG);
832 SL_RETURN(i, _("sh_forward_try"));
833}
834
835long sh_forward_req_file (char * file)
836{
837 long i;
838 char tmp_file[8];
839 SL_ENTER(_("sh_forward_req_file"));
840 (void) sl_strlcpy(tmp_file, file, 8);
841 i = sh_forward_try_impl (tmp_file, (char)SH_PROTO_BIG);
842 SL_RETURN(i, _("sh_forward_req_file"));
843}
844
845static unsigned long sh_throttle_delay = 0;
846
847int sh_forward_set_throttle_delay (const char * c)
848{
849 long val;
850
851 SL_ENTER(_("sh_forward_set_throttle_delay"));
852
853 val = strtol (c, (char **)NULL, 10);
854 if (val < 0)
855 SL_RETURN( (-1), _("sh_forward_set_throttle_delay"));
856
857 val = (val > 1000) ? 1000 : val;
858
859 sh_throttle_delay = (unsigned long) val;
860 SL_RETURN( (0), _("sh_forward_set_throttle_delay"));
861}
862
863
864static long sh_forward_try_impl (char * errmsg, char what)
865{
866 static int initialized = BAD;
867 static int conn_state = GOOD;
868 int sockfd;
869 int flag_err;
870 char * answer;
871
872 unsigned char theProto;
873
874 char hash[KEY_LEN+1];
875 size_t len;
876 char * buffer;
877#ifdef SH_ENCRYPT_2
878 size_t pos; /* for the server command */
879#endif
880 char head_u[5];
881
882 char nsrv[KEY_LEN+1];
883 char nclt[KEY_LEN+1];
884 SL_TICKET sfd = -1;
885 int transfercount;
886
887 char foo_M1[KEY_LEN+1];
888 UINT32 ticks;
889
890 char error_msg[256];
891 char error_call[SH_MINIBUF];
892 int error_num = 0;
893
894#ifdef USE_SRP_PROTOCOL
895 char u_real[SH_CHALLENGE_SIZE];
896 char * foo_A;
897 char * foo_Sc;
898 char * M;
899#else
900 char nounce[KEY_LEN+1];
901 char temp[2*KEY_LEN+1];
902 char nonce_u[KEY_LEN+1];
903#endif
904
905#ifdef SH_ENCRYPT
906 int err_num;
907 char expbuf[SH_ERRBUF_SIZE];
908#endif
909
910 static time_t time_now = 1200;
911 static time_t time_last = 0;
912
913 static time_t timeout_val = 1;
914 char hashbuf[KEYBUF_SIZE];
915 char sigbuf[KEYBUF_SIZE];
916
917 SL_ENTER(_("sh_forward_try_impl"));
918
919 /* --- No message to transmit. ---
920 */
921 if (errmsg == NULL && initialized == GOOD)
922 SL_RETURN( 0, _("sh_forward_try_impl"));
923
924 /* --- Connection in bad state. ---
925 */
926 if (initialized == BAD || conn_state == BAD)
927 {
928 timeout_val =
929 (time_t)((timeout_val > TIMEOUT_CON) ? TIMEOUT_CON : timeout_val);
930
931 /* --- Retry bad attempt only after some time. ---
932 */
933 time_now = time (NULL);
934 if ((time_now - time_last) < timeout_val)
935 {
936 TPT(( 0, FIL__, __LINE__, _("msg=<Within deadtime, no retry.>\n")));
937 SL_RETURN( (-1), _("sh_forward_try_impl"));
938 }
939 TPT(( 0, FIL__, __LINE__, _("msg=<Retry.>\n")));
940 }
941 time_last = time (NULL);
942
943
944 /* --- Try to connect to log server. ---
945 */
946 error_call[0] = '\0';
947
948 sockfd = connect_port_2 (sh.srvexport.name, sh.srvexport.alt,
949 ServerPort,
950 error_call, &error_num, error_msg, 256);
951
952 if (sockfd < 0)
953 {
954 conn_state = BAD;
955 timeout_val *= 2;
956 sh_error_handle ((-1), FIL__, __LINE__, error_num,
957 MSG_E_NET, error_msg, error_call,
958 _("export"), sh.srvexport.name);
959 SL_RETURN( (-1), _("sh_forward_try_impl"));
960 }
961
962 conn_state = GOOD;
963
964 /*************************
965 *
966 * initialization
967 *
968 */
969
970 flag_err = 0;
971 answer = SH_ALLOC(512);
972 MLOCK(answer, 512);
973
974
975#ifndef USE_SRP_PROTOCOL
976
977 /**************************************************
978 *
979 * --- challenge/response authentication ---
980 *
981 **************************************************/
982
983 if (initialized == BAD)
984 {
985 theProto = (unsigned char) SH_PROTO_SRP;
986
987 TPT(( 0, FIL__, __LINE__, _("msg=<c/r: entry>\n")));
988
989 (void) sl_strlcpy (answer, sh.host.name, 512);
990
991 flag_err = sh_forward_send (sockfd, (char) theProto, _("SALT"),
992 answer, (unsigned long)sl_strlen(answer));
993
994 TPT(( 0, FIL__, __LINE__, _("msg=<c/r: sent SALT, flag_err = %d>\n"),
995 flag_err));
996
997 /* get nonce from server
998 */
999 if (flag_err == 0)
1000 {
1001 flag_err = (int) sh_forward_receive (sockfd, (char)theProto, head_u,
1002 answer, 511);
1003 flag_err = (flag_err < 0) ? flag_err : 0;
1004 TPT(( 0, FIL__, __LINE__,
1005 _("msg=<c/r: rcvt nonce, flag_err = %d>\n"),
1006 flag_err));
1007 }
1008
1009 /* entry point for jump from message forward if session key must
1010 * be re-initialized
1011 */
1012 initBlock:
1013
1014 if (0 == check_request (head_u, _("INIT")) &&
1015 flag_err == 0 &&
1016 sl_strlen(answer) > KEY_LEN )
1017 (void) sl_strlcpy(nounce, &answer[KEY_LEN], KEY_LEN+1);
1018 else
1019 flag_err = (-1);
1020
1021 TPT(( 0, FIL__, __LINE__, _("msg=<c/r: rcvt INIT, flag_err = %d>\n"),
1022 flag_err));
1023
1024 /* verify random nonce v from server H(v, P)v
1025 */
1026 sh_passwd (nounce, NULL, NULL, temp);
1027 if ( 0 != sl_strncmp(temp, answer, KEY_LEN))
1028 flag_err = (-1);
1029
1030 TPT(( 0, FIL__, __LINE__, _("msg=<c/r: vrfy nonce, flag_err = %d>\n"),
1031 flag_err));
1032
1033
1034 /* --- Create own nonce. ---
1035 */
1036 ticks = (UINT32) taus_get ();
1037
1038 (void) sl_strlcpy(nonce_u,
1039 sh_tiger_hash((char *) &ticks,
1040 TIGER_DATA,
1041 (unsigned long)sizeof(UINT32),
1042 hashbuf, sizeof(hashbuf)),
1043 KEY_LEN+1);
1044
1045 /* --- Form the message H(H(u,v),P)u ---
1046 */
1047 (void) sl_strlcpy(temp, nonce_u, 2*KEY_LEN+1);
1048 (void) sl_strlcat(temp, nounce, 2*KEY_LEN+1);
1049 (void) sl_strlcpy(temp,
1050 sh_tiger_hash(temp,
1051 TIGER_DATA,
1052 (unsigned long)sl_strlen(temp),
1053 hashbuf, sizeof(hashbuf)),
1054 KEY_LEN+1);
1055 sh_passwd (temp, NULL, NULL, foo_M1);
1056 (void) sl_strlcpy(temp, foo_M1, 2*KEY_LEN+1);
1057 (void) sl_strlcat(temp, nonce_u, 2*KEY_LEN+1);
1058
1059 /* --- Send it to server. ---
1060 */
1061 if (flag_err == 0)
1062 {
1063 flag_err = (int) sh_forward_send (sockfd,
1064 (char)(theProto|SH_PROTO_SRP),
1065 _("PASS"), temp,
1066 (unsigned long)sl_strlen(temp));
1067 TPT(( 0, FIL__, __LINE__, _("msg=<c/r: sent PASS, flag_err = %d>\n"),
1068 flag_err));
1069 }
1070
1071 if (flag_err == 0)
1072 {
1073 flag_err = (int)sh_forward_receive (sockfd,
1074 (char)(theProto|SH_PROTO_SRP),
1075 head_u, answer, 511);
1076 sh_passwd (nounce, NULL, nonce_u, foo_M1);
1077 (void) sl_strlcpy (skey->session, foo_M1, KEY_LEN+1);
1078#ifdef SH_ENCRYPT
1079 err_num = makeKey(&(skey->keyInstE),
1080 (RIJ_BYTE)DIR_ENCRYPT, 192, skey->session);
1081 if (err_num < 0)
1082 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
1083 errorExplain(err_num, expbuf, sizeof(expbuf)),
1084 _("sh_forward_try_impl: makeKey"));
1085
1086 err_num = makeKey(&(skey->keyInstD),
1087 (RIJ_BYTE)DIR_DECRYPT, 192, skey->session);
1088 if (err_num < 0)
1089 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
1090 errorExplain(err_num, expbuf, sizeof(expbuf)),
1091 _("sh_forward_try_impl: make_key"));
1092#endif
1093 initialized = GOOD;
1094 }
1095
1096 if (initialized == BAD)
1097 {
1098 timeout_val *= 2;
1099 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_NOAUTH);
1100 memset(answer, 0, 512);
1101 MUNLOCK(answer, 512);
1102 SH_FREE(answer);
1103 SL_RETURN( (-1), _("sh_forward_try_impl"));
1104 }
1105 else
1106 {
1107 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_AUTH);
1108 }
1109 }
1110
1111#else
1112
1113
1114 /* This is the SRP authenticated key exchange protocol.
1115 * Produces a session key skey->session.
1116 */
1117 if (initialized == BAD)
1118 {
1119 TPT(( 0, FIL__, __LINE__, _("msg=<srp: entry>\n")));
1120
1121 theProto = SH_PROTO_SRP;
1122
1123 sl_strlcpy (answer, sh.host.name, 512);
1124 flag_err = sh_forward_send (sockfd, theProto, _("SALT "),
1125 answer, sl_strlen(answer));
1126
1127 TPT(( 0, FIL__, __LINE__, _("msg=<srp: sent SALT, flag_err = %d>\n"),
1128 flag_err));
1129
1130 if (flag_err == 0)
1131 {
1132 flag_err = sh_forward_receive (sockfd, theProto, head_u,
1133 answer, 511);
1134 flag_err = (flag_err < 0) ? flag_err : 0;
1135 TPT(( 0, FIL__, __LINE__,
1136 _("msg=<srp: rcvt nonce, flag_err = %d>\n"),
1137 flag_err));
1138 }
1139
1140 /* Entry point for jump from message forward if session key must
1141 * be re-initialized.
1142 */
1143 initBlock:
1144 TPT(( 0, FIL__, __LINE__, _("msg=<srp: INIT>\n")));
1145
1146 if (flag_err == 0 &&
1147 (0 == check_request (head_u, _("INIT"))))
1148 {
1149 if (0 != sh_srp_init())
1150 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_EBGN);
1151 else /* if (0 == sh_srp_init()) */
1152 {
1153 TPT(( 0, FIL__, __LINE__, _("msg=<srp: bignum initialized>\n")));
1154
1155 sh_srp_x (answer, NULL); /* x password */
1156 sh_srp_make_a (); /* a random number */
1157 foo_A = sh_srp_A(); /* g^a */
1158
1159 TPT(( 0, FIL__, __LINE__, _("msg=<srp: A = %s>\n"), foo_A));
1160
1161 if (foo_A == NULL)
1162 flag_err = (-1);
1163
1164 if (flag_err == 0)
1165 flag_err = sh_forward_send (sockfd,
1166 (theProto|SH_PROTO_SRP),
1167 _("PC01"),
1168 foo_A, sl_strlen(foo_A)+1);
1169 if (flag_err == 0)
1170 {
1171 flag_err = sh_forward_receive (sockfd,
1172 (theProto|SH_PROTO_SRP),
1173 head_u,
1174 answer, 511);
1175 flag_err = (flag_err < 0) ? flag_err : 0;
1176 TPT(( 0, FIL__, __LINE__, _("msg=<srp: B = %s>\n"), answer));
1177 TPT(( 0, FIL__, __LINE__, _("msg=<srp: u = %03o-%03o-%03o-%03o>\n"), head_u[0], head_u[1], head_u[2], head_u[3]));
1178 }
1179
1180 /* u nounce */
1181 /* B answer */
1182 /* S = (B-g^x)^(a+ux) */
1183
1184 if (flag_err == 0)
1185 {
1186 if (0 != sh_srp_check_zero (answer))
1187 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_EZERO);
1188 else /* if (0 != sh_srp_check_zero (answer)) */
1189 {
1190 sl_strlcpy(u_real, sh_tiger_hash(head_u, TIGER_DATA, 4,
1191 hashbuf, sizeof(hashbuf)),
1192 SH_CHALLENGE_SIZE);
1193 foo_Sc = sh_srp_S_c (u_real, answer);
1194
1195 TPT(( 0, FIL__, __LINE__, _("msg=<srp: U = %s>\n"),
1196 u_real));
1197 TPT(( 0, FIL__, __LINE__, _("msg=<srp:Sc = %s>\n"),
1198 foo_Sc));
1199
1200 /* --- Now send H(A,B,H(Sc)) and check. ---
1201 */
1202 if (foo_Sc != NULL && 0 == sh_srp_check_zero (foo_Sc))
1203 {
1204 sh_srp_M(foo_A,
1205 answer,
1206 sh_tiger_hash(foo_Sc,
1207 TIGER_DATA,
1208 sl_strlen(foo_Sc),
1209 hashbuf, sizeof(hashbuf)),
1210 foo_M1, KEY_LEN+1);
1211
1212
1213 TPT(( 0, FIL__, __LINE__, _("msg=<srp:M1 = %s>\n"),
1214 foo_M1));
1215
1216 flag_err = sh_forward_send(sockfd,
1217 (theProto|SH_PROTO_SRP),
1218 _("PC02"),
1219 foo_M1, KEY_LEN+1);
1220 }
1221 else
1222 {
1223 flag_err = (-1);
1224 }
1225
1226 if (flag_err == 0)
1227 {
1228 flag_err =sh_forward_receive(sockfd,
1229 (theProto|SH_PROTO_SRP),
1230 head_u,
1231 answer, 511);
1232 flag_err = (flag_err < 0) ? flag_err : 0;
1233 TPT(( 0, FIL__, __LINE__, _("msg=<srp: M = %s>\n"),
1234 answer));
1235 }
1236
1237 if (flag_err == 0 &&
1238 (0 == check_request (head_u, _("PARP"))))
1239 {
1240 /* ------ verify M2 = H(A, M1, K) --------
1241 */
1242 char M_buf[KEY_LEN+1];
1243 M = sh_srp_M (foo_A, foo_M1,
1244 sh_tiger_hash(foo_Sc,
1245 TIGER_DATA,
1246 sl_strlen(foo_Sc),
1247 hashbuf, sizeof(hashbuf)),
1248 M_buf, sizeof(M_buf)
1249 );
1250 if (M != NULL &&
1251 0 == sl_strncmp (answer, M, KEY_LEN+1))
1252 {
1253 sl_strlcpy (skey->session,
1254 sh_tiger_hash(foo_Sc,
1255 TIGER_DATA,
1256 sl_strlen(foo_Sc),
1257 hashbuf, sizeof(hashbuf)),
1258 KEY_LEN+1);
1259 TPT(( 0, FIL__, __LINE__,
1260 _("msg=<srp: Key = %s>\n"),
1261 skey->session));
1262
1263#ifdef SH_ENCRYPT
1264 err_num = makeKey(&(skey->keyInstE),
1265 DIR_ENCRYPT,
1266 192, skey->session);
1267 if (err_num < 0)
1268 sh_error_handle((-1), FIL__, __LINE__, -1,
1269 MSG_E_SUBGEN,
1270 errorExplain(err_num, expbuf, sizeof(expbuf)),
1271 _("sh_forward_try_impl: makeKey"));
1272 err_num = makeKey(&(skey->keyInstD),
1273 DIR_DECRYPT,
1274 192, skey->session);
1275 if (err_num < 0)
1276 sh_error_handle((-1), FIL__, __LINE__, -1,
1277 MSG_E_SUBGEN,
1278 errorExplain(err_num, expbuf, sizeof(expbuf)),
1279 _("sh_forward_try_impl: makeKey"));
1280#endif
1281 initialized = GOOD;
1282 }
1283 }
1284 if (foo_Sc != NULL)
1285 SH_FREE(foo_Sc);
1286 }
1287 }
1288 if (foo_A != NULL)
1289 SH_FREE(foo_A);
1290 sh_srp_exit();
1291 }
1292 }
1293
1294 if (initialized == BAD)
1295 {
1296 timeout_val *= 2;
1297 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_NOAUTH);
1298 memset(answer, '\0', 512);
1299 MUNLOCK(answer, 512);
1300 SH_FREE(answer);
1301 SL_RETURN( (-1), _("sh_forward_try_impl"));
1302 }
1303 else
1304 {
1305 if (flag_err_info == SL_TRUE)
1306 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_AUTH);
1307 }
1308 }
1309
1310#endif
1311
1312 /* no message, just session key negotiated
1313 */
1314 if (errmsg == NULL)
1315 {
1316 timeout_val = 1;
1317 memset(answer, 0, 512);
1318 MUNLOCK(answer, 512);
1319 SH_FREE(answer);
1320 TPT(( 0, FIL__, __LINE__, _("msg=<No message.>\n")));
1321 SL_RETURN( (0), _("sh_forward_try_impl"));
1322 }
1323 else if (what == (char)SH_PROTO_BIG)
1324 {
1325 MUNLOCK(answer, 512);
1326 SH_FREE (answer);
1327 answer = SH_ALLOC(TRANS_BYTES + 256);
1328 MLOCK(answer, TRANS_BYTES + 256);
1329 TPT(( 0, FIL__, __LINE__, _("msg=<File transfer.>\n")));
1330 }
1331
1332
1333 (void) sl_strlcpy (answer, sh_util_siggen(skey->session,
1334 sh.host.name,
1335 sl_strlen(sh.host.name),
1336 sigbuf, sizeof(sigbuf)),
1337 KEY_LEN+1);
1338 TPT((0, FIL__, __LINE__, _("msg=<host %s>\n"), sh.host.name));
1339 TPT((0, FIL__, __LINE__, _("msg=<ckey %s>\n"), skey->session));
1340 TPT((0, FIL__, __LINE__, _("msg=<sign %s>\n"), answer));
1341
1342
1343 (void) sl_strlcat (answer, sh.host.name, 512);
1344
1345 TPT((0, FIL__, __LINE__, _("msg=<mesg %s>\n"), answer));
1346
1347 /***********************************************
1348 *
1349 * send the message
1350 *
1351 */
1352
1353 if (what == (char) SH_PROTO_MSG)
1354 {
1355 theProto = (unsigned char)SH_PROTO_MSG;
1356
1357 /* say HELO
1358 */
1359
1360 flag_err = sh_forward_send (sockfd,
1361 (char)theProto, _("HELO"),
1362 answer,
1363 (unsigned long)sl_strlen(answer));
1364 TPT(( 0, FIL__, __LINE__, _("msg=<Sent %s, status %d.>\n"),
1365 answer, flag_err));
1366 if (flag_err == 0)
1367 {
1368 /* --- Get challenge. ---
1369 */
1370 flag_err = (int) sh_forward_receive (sockfd,
1371 (char)SH_PROTO_MSG, head_u,
1372 answer, 255);
1373 TPT(( 0, FIL__, __LINE__, _("msg=<Rcvt %s, u %s, status %d.>\n"),
1374 answer, hu_trans(head_u), flag_err));
1375 flag_err = (flag_err < 0) ? flag_err : 0;
1376
1377 if (flag_err == 0)
1378 {
1379
1380 /* --- Re-negotiate key. ---
1381 */
1382 if (0 == check_request_nerr(head_u, _("INIT")))
1383 {
1384 flag_err = 0;
1385 initialized = BAD;
1386 goto initBlock;
1387 }
1388
1389 else if (0 == check_request(head_u, _("TALK")))
1390 {
1391
1392 /* --- Save the challenge. ---
1393 */
1394 (void) sl_strlcpy(nsrv, answer, KEY_LEN + 1);
1395
1396 /* --- Hash(msg,challenge,sessionkey). ---
1397 */
1398 len = sl_strlen(errmsg) + sl_strlen(answer)
1399 + KEY_LEN + 1;
1400 len = (size_t)((len < 256) ? 256 : len);
1401 buffer = SH_ALLOC(len);
1402 MLOCK(buffer, len);
1403 (void) sl_strlcpy(buffer, errmsg, len);
1404 (void) sl_strlcat(buffer, answer, len);
1405 (void) sl_strlcpy(hash,
1406 sh_util_siggen (skey->session,
1407 buffer,
1408 sl_strlen(buffer),
1409 sigbuf, sizeof(sigbuf)),
1410 KEY_LEN+1);
1411 TPT((0, FIL__, __LINE__, _("msg=<sign %s.>\n"),
1412 sh_util_siggen(skey->session, buffer,
1413 sl_strlen(buffer), sigbuf, sizeof(sigbuf))));
1414
1415 (void) sl_strlcpy(buffer, errmsg, len);
1416 (void) sl_strlcat(buffer, hash, len);
1417
1418 flag_err =
1419 sh_forward_send_crypt (sockfd,
1420#ifdef SH_ENCRYPT
1421#ifdef SH_ENCRYPT_2
1422 (char)(SH_PROTO_MSG|SH_PROTO_ENC|SH_PROTO_EN2),
1423#else
1424 (char)(SH_PROTO_MSG|SH_PROTO_ENC),
1425#endif
1426#else
1427 (char)(SH_PROTO_MSG),
1428#endif
1429 _("MESG"),
1430 buffer,
1431 (unsigned long)(sl_strlen(buffer)+1));
1432 TPT(( 0, FIL__, __LINE__,
1433 _("msg=<Sent %s, status %d.>\n"),
1434 answer, flag_err));
1435
1436 /* --- Get confirmation. ---
1437 */
1438 if (flag_err == 0)
1439 {
1440 flag_err = (int)
1441 sh_forward_receive_crypt (sockfd,
1442#ifdef SH_ENCRYPT
1443#ifdef SH_ENCRYPT_2
1444 (char)(SH_PROTO_MSG|SH_PROTO_ENC|SH_PROTO_EN2|SH_PROTO_END),
1445#else
1446 (char)(SH_PROTO_MSG|SH_PROTO_ENC|SH_PROTO_END),
1447#endif
1448#else
1449 (char)(SH_PROTO_MSG|SH_PROTO_END),
1450#endif
1451 head_u,
1452 answer, 255);
1453 TPT(( 0, FIL__, __LINE__,
1454 _("msg=<Rcvt %s, u %s, status %d.>\n"),
1455 answer, hu_trans(head_u), flag_err));
1456 flag_err = (flag_err < 0) ? flag_err : 0;
1457 }
1458
1459
1460 /* --- Check confirmation. ---
1461 */
1462 if (flag_err == 0)
1463 {
1464 /* CLIENT CONF RECV
1465 *
1466 * first KEY_LEN bytes must be
1467 * sig(skey->session (errmsg nsrv))
1468 *
1469 */
1470 (void) sl_strlcpy(buffer, errmsg, len);
1471 (void) sl_strlcat(buffer, nsrv, len);
1472 flag_err = sl_strncmp(answer,
1473 sh_util_siggen(skey->session,
1474 buffer,
1475 sl_strlen(buffer),
1476 sigbuf, sizeof(sigbuf)),
1477 KEY_LEN);
1478 TPT((0, FIL__, __LINE__, _("msg=<sign %s.>\n"),
1479 sh_util_siggen(skey->session, buffer,
1480 sl_strlen(buffer), sigbuf, sizeof(sigbuf))));
1481
1482 if (flag_err != 0)
1483 {
1484#ifdef ENOMSG
1485 flag_err = ENOMSG;
1486#else
1487 flag_err = EIO;
1488#endif
1489 sh_error_handle((-1), FIL__, __LINE__, flag_err,
1490 MSG_TCP_NOCONF);
1491 }
1492 else
1493 {
1494#ifdef SH_ENCRYPT_2
1495 /* --- SERVER CMD --- */
1496 if (answer[KEY_LEN] != '\0' &&
1497 sl_strlen(answer) > (2*KEY_LEN))
1498 {
1499 pos = sl_strlen(answer) - (2*KEY_LEN);
1500 /*
1501 * buffer is >= 256
1502 * answer has <= 255 bytes
1503 */
1504 (void) sl_strlcpy(buffer, &answer[KEY_LEN],
1505 pos+1);
1506 flag_err =
1507 sl_strncmp(&answer[KEY_LEN+pos],
1508 sh_util_siggen(skey->session,
1509 buffer,
1510 pos,
1511 sigbuf, sizeof(sigbuf)),
1512 KEY_LEN);
1513
1514 TPT((0, FIL__, __LINE__,
1515 _("CONF RECV <%d> <%s>\n"),
1516 flag_err, &answer[KEY_LEN]));
1517
1518 if (flag_err != 0) {
1519 sh_error_handle((-1), FIL__, __LINE__,
1520 flag_err,
1521 MSG_TCP_NOCONF);
1522 }
1523#ifdef SH_WITH_CLIENT
1524 else {
1525 sh_socket_server_cmd(buffer);
1526 }
1527#endif
1528 flag_err = 0;
1529
1530 } else {
1531
1532 TPT((0, FIL__, __LINE__,
1533 _("CONF RECV <0> <[null]>\n")));
1534
1535 }
1536 /* --- SERVER CMD END --- */
1537#endif
1538 if (flag_err_debug == SL_TRUE)
1539 sh_error_handle((-1), FIL__, __LINE__, 0,
1540 MSG_TCP_CONF);
1541 }
1542 }
1543
1544 memset(buffer, 0, len);
1545 MUNLOCK(buffer, len);
1546 SH_FREE(buffer);
1547 }
1548 else
1549 {
1550 /* --- Unexpected reply from server. ---
1551 */
1552 sh_error_handle((-1), FIL__, __LINE__, 0,
1553 MSG_TCP_UNEXP);
1554 flag_err = (-1);
1555 }
1556 }
1557 }
1558 }
1559
1560
1561 else if (what == (char)SH_PROTO_BIG)
1562 {
1563 theProto = (unsigned char) SH_PROTO_BIG;
1564
1565 /* --- Say HELO ---
1566 */
1567 flag_err = sh_forward_send (sockfd, (char) theProto, _("HELO"),
1568 answer, (unsigned long)sl_strlen(answer));
1569 TPT(( 0, FIL__, __LINE__, _("msg=<Sent %s, status %d.>\n"),
1570 answer, flag_err));
1571
1572 if (flag_err == 0)
1573 {
1574 /* --- Get NSRV. ---
1575 */
1576 flag_err = (int) sh_forward_receive (sockfd,
1577 (char)SH_PROTO_BIG, head_u,
1578 answer, 255);
1579 TPT(( 0, FIL__, __LINE__, _("msg=<Rcvt %s, u %s, status %d.>\n"),
1580 answer, hu_trans(head_u), flag_err));
1581 flag_err = (flag_err < 0) ? flag_err : 0;
1582 }
1583
1584 if (flag_err == 0)
1585 {
1586
1587 /* --- Re-negotiate key. ---
1588 */
1589 if (0 == check_request_nerr(head_u, _("INIT")))
1590 {
1591 flag_err = 0;
1592 initialized = BAD;
1593 goto initBlock;
1594 }
1595
1596
1597 else if (0 == check_request(head_u, _("NSRV")))
1598 {
1599#ifdef SH_ENCRYPT
1600 /* --- Set encryption flag. ---
1601 */
1602#ifdef SH_ENCRYPT_2
1603 theProto =
1604 (unsigned char)(SH_PROTO_BIG | SH_PROTO_ENC | SH_PROTO_EN2);
1605#else
1606 theProto = (unsigned char)(SH_PROTO_BIG | SH_PROTO_ENC);
1607#endif
1608#endif
1609
1610 (void) sl_strlcpy(nsrv, answer, KEY_LEN+1);
1611
1612 /* --- Generate a nonce. ---
1613 */
1614 ticks = (UINT32) taus_get ();
1615
1616 (void) sl_strlcpy(nclt,
1617 sh_tiger_hash((char *) &ticks,
1618 TIGER_DATA,
1619 (unsigned long)sizeof(UINT32),
1620 hashbuf, sizeof(hashbuf)),
1621 KEY_LEN+1);
1622
1623 /* --- Compute H(nsrv, nclt, skey). ---
1624 */
1625 buffer = sh_util_strconcat (nsrv, nclt,
1626 skey->session, NULL);
1627 (void)sl_strlcpy(foo_M1,
1628 sh_tiger_hash(buffer, TIGER_DATA,
1629 (unsigned long)sl_strlen(buffer),
1630 hashbuf, sizeof(hashbuf)),
1631 KEY_LEN+1);
1632 memset (buffer, 0, sl_strlen(buffer));
1633
1634 /* --- Send (nclt, msg) ---
1635 */
1636 (void) sl_strlcpy(buffer, nclt, KEY_LEN+1);
1637 (void) sl_strlcat(buffer, errmsg, KEY_LEN+5);
1638
1639#ifndef SH_ENCRYPT
1640 buffer[KEY_LEN+4] = theProto;
1641 buffer[KEY_LEN+5] = '\0';
1642 sh_tools_hash_add(foo_M1, buffer, KEY_LEN+5);
1643#endif
1644
1645 flag_err =
1646 sh_forward_send_crypt (sockfd, (char) theProto, _("NCLT"),
1647 buffer,
1648 (unsigned long) sl_strlen(buffer));
1649
1650 TPT(( 0, FIL__, __LINE__, _("msg=<Sent %s, status %d.>\n"),
1651 buffer, flag_err));
1652 SH_FREE (buffer);
1653 }
1654 }
1655
1656 if (flag_err == 0)
1657 {
1658 /* --- Receive the file. ---
1659 */
1660
1661 /* --- Open a temporary file. ---
1662 */
1663
1664 if ( (sfd = open_tmp ()) < 0)
1665 {
1666 flag_err = (-1);
1667 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_EFIL);
1668 }
1669 else
1670 {
1671 /* --- Read from socket into tmp file. ---
1672 */
1673 transfercount = 0;
1674 flag_err = 0;
1675
1676 do {
1677 flag_err = (int)
1678 sh_forward_receive_crypt (sockfd,
1679#ifdef SH_ENCRYPT
1680#ifdef SH_ENCRYPT_2
1681 (char)(SH_PROTO_BIG|SH_PROTO_EN2|SH_PROTO_ENC),
1682#else
1683 (char)(SH_PROTO_BIG|SH_PROTO_ENC),
1684#endif
1685#else
1686 (char)(SH_PROTO_BIG),
1687#endif
1688 head_u,
1689 answer,
1690 TRANS_BYTES + 255);
1691
1692 TPT(( 0, FIL__, __LINE__,
1693 _("msg=<Received: %d bytes, marked %s.>\n"),
1694 flag_err, hu_trans(head_u)));
1695
1696 if (flag_err > 0 && 0 == check_request_nerr(head_u, _("FILE")))
1697 {
1698 if (0 == hash_check (foo_M1, answer, flag_err))
1699 {
1700 (void) sl_write(sfd, &answer[KEY_LEN],
1701 flag_err-KEY_LEN);
1702 ++transfercount;
1703 /***
1704 *** --- Delay for throughput throttling ---
1705 ***/
1706 if (sh_throttle_delay > 0)
1707 retry_msleep(sh_throttle_delay/1000, sh_throttle_delay % 1000);
1708 /***
1709 *** --- End delay ---
1710 ***/
1711 flag_err =
1712 sh_forward_send_crypt (sockfd, (char) theProto,
1713 _("RECV"),
1714 nclt,
1715 (unsigned long)sl_strlen(nclt));
1716
1717 }
1718 else
1719 {
1720 TPT(( 0, FIL__, __LINE__,
1721 _("msg=<File transfer: Hash check failed.>\n")));
1722 break;
1723 }
1724 }
1725 else
1726 {
1727 TPT(( 0, FIL__, __LINE__,
1728 _("msg=<File transfer: No more data.>\n")));
1729 break;
1730 }
1731 } while (transfercount < 32000); /* 64 Mbyte */
1732
1733 if (0 == check_request_nerr(head_u, _("EEOT")) &&
1734 0 < flag_err &&
1735 0 == hash_check (foo_M1, answer, (int)strlen(answer)))
1736 {
1737 flag_err =
1738 sh_forward_send_crypt (sockfd, (char) theProto,
1739 _("EOTE"),
1740 nclt,
1741 (unsigned int) sl_strlen(nclt));
1742
1743 (void) rewind_tmp (sfd);
1744 (void) sl_sync(sfd);
1745 if (flag_err_info == SL_TRUE)
1746 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_FOK);
1747 }
1748 else
1749 {
1750 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_FBAD);
1751 (void) sl_close (sfd);
1752 sfd = (-1);
1753 }
1754
1755 (void) close (sockfd);
1756 memset(answer, 0, TRANS_BYTES + 256);
1757 MUNLOCK(answer, TRANS_BYTES + 256);
1758 SH_FREE(answer);
1759 timeout_val = 1;
1760
1761 SL_RETURN( (sfd), _("sh_forward_try_impl"));
1762 }
1763 }
1764
1765 (void) close (sockfd);
1766 memset(answer, 0, TRANS_BYTES + 256);
1767 MUNLOCK(answer, TRANS_BYTES + 256);
1768 SH_FREE(answer);
1769 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_FBAD);
1770 timeout_val *= 2;
1771
1772 SL_RETURN( (-1), _("sh_forward_try_impl"));
1773 }
1774
1775
1776
1777 (void) close (sockfd);
1778 memset(answer, 0, 512);
1779 MUNLOCK(answer, 512);
1780 SH_FREE(answer);
1781
1782#ifndef EIO
1783#define EIO 5
1784#endif
1785
1786
1787#ifdef SH_ERROR_H
1788 if (flag_err != 0)
1789 {
1790 char errbuf[SH_ERRBUF_SIZE];
1791 conn_state = BAD;
1792 timeout_val *= 2;
1793 if (flag_err < 0 || NULL == sh_error_message(flag_err, errbuf, sizeof(errbuf)))
1794 flag_err = EIO;
1795 sh_error_handle((-1), FIL__, __LINE__, flag_err, MSG_TCP_ECONN,
1796 sh_error_message(flag_err, errbuf, sizeof(errbuf)));
1797 SL_RETURN( (-1), _("sh_forward_try_impl"));
1798 }
1799#endif
1800 timeout_val = 1;
1801
1802 SL_RETURN( (0), _("sh_forward_try_impl"));
1803}
1804
1805/* #ifdef SH_WITH_CLIENT */
1806#endif
1807
1808
1809#if defined (SH_WITH_SERVER)
1810
1811#ifndef USE_SRP_PROTOCOL
1812
1813int sh_forward_make_client (const char * str)
1814{
1815 /* char * safer; */
1816 char key[KEY_LEN+1];
1817 unsigned char in[PW_LEN+1];
1818 int i = 0, j, k, l = 0;
1819 char hashbuf[KEYBUF_SIZE];
1820
1821 if (sl_strlen(str) != (PW_LEN * 2))
1822 {
1823 fprintf(stderr,
1824 _("Input must be a %d digit hexadecimal number"\
1825 " (only 0-9, a-f, A-F allowed in input)\n"),
1826 (PW_LEN * 2));
1827 _exit(EXIT_FAILURE);
1828 }
1829
1830 while (i < (PW_LEN * 2))
1831 {
1832 k = sh_util_hexchar(str[i]); j = sh_util_hexchar(str[i+1]);
1833 if (k != -1 && j != -1)
1834 {
1835 in[l] = (k * 16 + j);
1836 ++l; i+= 2;
1837 }
1838 else
1839 {
1840 fprintf(stderr, _("Invalid char %c\n"), str[i]);
1841 _exit(EXIT_FAILURE);
1842 }
1843 }
1844 in[PW_LEN] = '\0';
1845
1846 sl_strlcpy ((char *)key,
1847 sh_tiger_hash ((char*)in, TIGER_DATA, PW_LEN,
1848 hashbuf, sizeof(hashbuf)),
1849 KEY_LEN+1);
1850 key[KEY_LEN] = '\0';
1851
1852 fprintf(stdout, _("Client entry: Client=HOSTNAME@00000000@%s\n"),
1853 key);
1854 fflush(stdout);
1855
1856 _exit(EXIT_SUCCESS);
1857 return 0;
1858}
1859
1860#else
1861
1862int sh_forward_make_client (const char * str)
1863{
1864 char * foo_v;
1865
1866 char salt[17];
1867 char key[KEY_LEN+1];
1868 char in[PW_LEN];
1869 int i = 0, j, k, l = 0;
1870 char hashbuf[KEYBUF_SIZE];
1871
1872 if (sl_strlen(str) != (PW_LEN*2))
1873 {
1874 fprintf(stderr,
1875 _("Input must be a %d digit hexadecimal number"\
1876 " (only 0-9, a-f, A-F allowed in input)\n"),
1877 (PW_LEN*2));
1878 _exit(EXIT_FAILURE);
1879 }
1880
1881 while (i < (PW_LEN*2))
1882 {
1883 k = sh_util_hexchar(str[i]); j = sh_util_hexchar(str[i+1]);
1884 if (k != -1 && j != -1)
1885 {
1886 in[l] = (k * 16 + j);
1887 ++l; i+= 2;
1888 }
1889 else
1890 {
1891 fprintf(stderr, _("Invalid char %c\n"), str[i]);
1892 _exit(EXIT_FAILURE);
1893 }
1894 }
1895
1896
1897 if (0 == sh_srp_init())
1898 {
1899 sh_util_keyinit(key, KEY_LEN);
1900 sl_strlcpy(salt, sh_tiger_hash(key, TIGER_DATA, KEY_LEN,
1901 hashbuf, sizeof(hashbuf)),
1902 17);
1903 sh_srp_x (salt, in);
1904 foo_v = sh_srp_verifier ();
1905 fprintf(stdout, _("Client=HOSTNAME@%s@%s\n"),
1906 salt, foo_v);
1907 fflush(stdout);
1908 SH_FREE(foo_v);
1909 sh_srp_exit();
1910 _exit(EXIT_SUCCESS);
1911 }
1912 fprintf(stdout, "%s",_("ERROR initializing BigNum library.\n"));
1913 fflush (stdout);
1914 _exit(EXIT_FAILURE);
1915 return -1;
1916}
1917#endif
1918
1919
1920int sh_forward_create_password (const char * dummy)
1921{
1922 UINT32 val[2];
1923 char output[KEY_LEN+1];
1924 char hashbuf[KEYBUF_SIZE];
1925
1926 val[0] = taus_get ();
1927 val[1] = taus_get ();
1928
1929 sl_strlcpy (output,
1930 sh_tiger_hash((char *)(&val[0]), TIGER_DATA, 2*sizeof(UINT32),
1931 hashbuf, sizeof(hashbuf)),
1932 KEY_LEN);
1933
1934 output[16] = '\0';
1935
1936 fprintf(stdout, _("%s\n"), output);
1937 fflush (stdout);
1938
1939 if (dummy)
1940 _exit(EXIT_SUCCESS);
1941 else
1942 _exit(EXIT_SUCCESS);
1943 return (0); /* avoid compiler warning */
1944}
1945
1946/* #if defined (SH_WITH_SERVER) */
1947#endif
1948
1949/**************************************************
1950 *
1951 *
1952 * S E R V E R
1953 *
1954 *
1955 ***************************************************/
1956
1957#ifdef SH_WITH_SERVER
1958
1959#include "sh_readconf.h"
1960
1961
1962#define CONN_FREE 0
1963#define CONN_READING 1
1964#define CONN_SENDING 2
1965#define CONN_PAUSE 3
1966#define CONN_BUSY 4
1967
1968char * clt_stat[] = {
1969 N_("Inactive"),
1970 N_("Started"),
1971 N_("ILLEGAL"),
1972 N_("FAILED"),
1973 N_("Exited"),
1974 N_("PANIC"),
1975 N_("POLICY"),
1976 N_("File_transfer"),
1977 N_("Message"),
1978 N_("TIMEOUT_EXCEEDED"),
1979 N_("Suspended"),
1980 N_("Filecheck"),
1981};
1982
1983#include <time.h>
1984
1985/* in sh_html.h:
1986 * typedef struct client_entry {
1987 * } client_t;
1988 */
1989
1990#include "zAVLTree.h"
1991
1992/* Function to return the key for indexing
1993 * the argument
1994 */
1995zAVLKey sh_avl_key (void const * arg)
1996{
1997 const client_t * sa = (const client_t *) arg;
1998 return (zAVLKey) sa->hostname;
1999}
2000
2001zAVLTree * all_clients = NULL;
2002
2003void sh_forward_html_write()
2004{
2005 SL_ENTER(_("sh_forward_html_write"));
2006 sh_html_write(all_clients);
2007 SL_RET0(_("sh_forward_html_write"));
2008}
2009
2010
2011int sh_forward_use_clt_class (const char * c)
2012{
2013 int i;
2014 SL_ENTER(_("sh_forward_use_clt_class"));
2015 i = sh_util_flagval(c, &(sh.flag.client_class));
2016 SL_RETURN(i, _("sh_forward_use_clt_class"));
2017}
2018
2019int sh_forward_use_clt_sev (const char * c)
2020{
2021 int i;
2022 SL_ENTER(_("sh_forward_use_clt_sev"));
2023 i = sh_util_flagval(c, &(sh.flag.client_severity));
2024 SL_RETURN(i, _("sh_forward_use_clt_sev"));
2025}
2026
2027
2028/* the destructor
2029 */
2030void free_client(void * inptr)
2031{
2032 client_t * here;
2033
2034 SL_ENTER(_("free_client"));
2035 if (inptr == NULL)
2036 SL_RET0(_("free_client"));
2037 else
2038 here = (client_t *) inptr;
2039
2040 if (here->hostname != NULL)
2041 SH_FREE(here->hostname);
2042 if (here->salt != NULL)
2043 SH_FREE(here->salt);
2044 if (here->verifier != NULL)
2045 SH_FREE(here->verifier);
2046 SH_FREE(here);
2047 SL_RET0(_("free_client"));
2048}
2049
2050
2051int sh_forward_register_client (const char * str)
2052{
2053 client_t * newclt;
2054 client_t * testclt;
2055
2056 const char * ptr;
2057 int sepnum = 0;
2058 int sep[2];
2059 register int i = 0;
2060 int siz_str = 0;
2061
2062 SL_ENTER(_("sh_forward_register_client"));
2063
2064 ptr = str;
2065 while (*ptr) {
2066 if (*ptr == '@' && sepnum < 2 )
2067 {
2068 sep[sepnum] = i;
2069 ++sepnum;
2070 }
2071 ++ptr; ++i;
2072 }
2073
2074 if (all_clients == NULL)
2075 {
2076 all_clients = zAVLAllocTree (sh_avl_key);
2077 if (all_clients == NULL)
2078 {
2079 (void) safe_logger (0, 0, NULL);
2080 aud__exit(FIL__, __LINE__, EXIT_FAILURE);
2081 }
2082 }
2083
2084 if ((sepnum == 2) && (sep[0] > 0) && (sep[1] > sep[0]))
2085 {
2086 newclt = SH_ALLOC (sizeof(client_t));
2087 newclt->hostname = SH_ALLOC (sep[0]+1);
2088 newclt->salt = SH_ALLOC (sep[1]-sep[0]);
2089 newclt->verifier = SH_ALLOC (sl_strlen(str)-sep[1]+1);
2090 newclt->exit_flag = 0;
2091 newclt->dead_flag = 0;
2092#ifdef SH_ENCRYPT
2093#ifdef SH_ENCRYPT_2
2094 newclt->encf_flag = SH_PROTO_ENC|SH_PROTO_EN2;
2095 newclt->ency_flag = SH_PROTO_ENC|SH_PROTO_EN2;
2096#else
2097 newclt->encf_flag = SH_PROTO_ENC;
2098 newclt->ency_flag = SH_PROTO_ENC;
2099#endif
2100#else
2101 newclt->encf_flag = 0;
2102 newclt->ency_flag = 0;
2103#endif
2104 newclt->session_key[0] = '\0';
2105 newclt->last_connect = (time_t) 0;
2106 newclt->session_key_timer = (time_t) 0;
2107 newclt->status_now = CLT_INACTIVE;
2108 for (i = 0; i < CLT_MAX; ++i)
2109 newclt->status_arr[i] = CLT_INACTIVE;
2110 (void) sh_unix_time(0, newclt->timestamp[CLT_INACTIVE], TIM_MAX);
2111 /* truncate */
2112 sl_strlcpy(newclt->hostname, &str[0], sep[0]+1);
2113 /* truncate */
2114 sl_strlcpy(newclt->salt, &str[sep[0]+1], sep[1]-sep[0]);
2115 sl_strlcpy(newclt->verifier, &str[sep[1]+1], sl_strlen(str)-sep[1]+1);
2116
2117 testclt = (client_t *) zAVLSearch (all_clients, newclt->hostname);
2118
2119 if (testclt != NULL)
2120 {
2121 SH_FREE(testclt->verifier);
2122 siz_str = strlen (newclt->verifier) + 1;
2123 testclt->verifier = SH_ALLOC (siz_str);
2124 sl_strlcpy(testclt->verifier, newclt->verifier, siz_str);
2125
2126 SH_FREE(testclt->salt);
2127 siz_str = strlen (newclt->salt) + 1;
2128 testclt->salt = SH_ALLOC (siz_str);
2129 sl_strlcpy(testclt->salt, newclt->salt, siz_str);
2130
2131 testclt->dead_flag = 0;
2132
2133 free_client(newclt);
2134 SL_RETURN( 0, _("sh_forward_register_client"));
2135 }
2136 else
2137 {
2138 if (0 == zAVLInsert (all_clients, newclt))
2139 {
2140 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_CREG,
2141 newclt->hostname,
2142 newclt->salt, newclt->verifier);
2143 SL_RETURN( 0, _("sh_forward_register_client"));
2144 }
2145 }
2146 }
2147 SL_RETURN (-1, _("sh_forward_register_client"));
2148}
2149
2150typedef struct {
2151 int state;
2152 int fd;
2153 char * buf;
2154 unsigned char head[SH_HEADER_SIZE];
2155 char challenge[SH_CHALLENGE_SIZE];
2156 char peer[SH_MINIBUF+1];
2157 client_t * client_entry;
2158 char * K;
2159 char * M1;
2160 char * A;
2161 int headcount;
2162 unsigned long bytecount;
2163 unsigned long bytes_to_send;
2164 unsigned long bytes_to_get;
2165 int pass;
2166 unsigned long timer;
2167
2168 char * FileName;
2169 unsigned long FileLength;
2170 unsigned long FileSent;
2171 char FileType[5];
2172
2173 struct sockaddr_in addr_peer;
2174} sh_conn_t;
2175
2176
2177static char zap_challenge[SH_CHALLENGE_SIZE] = { 0 };
2178
2179void sh_forward_do_free (sh_conn_t * conn)
2180{
2181 SL_ENTER(_("sh_forward_do_free"));
2182
2183 if (conn->K != NULL)
2184 {
2185 SH_FREE(conn->K);
2186 conn->K = NULL;
2187 }
2188 if (conn->A != NULL)
2189 {
2190 SH_FREE(conn->A);
2191 conn->A = NULL;
2192 }
2193 if (conn->M1 != NULL)
2194 {
2195 SH_FREE(conn->M1);
2196 conn->M1 = NULL;
2197 }
2198 if (conn->buf != NULL)
2199 {
2200 SH_FREE(conn->buf);
2201 conn->buf = NULL;
2202 }
2203 if (conn->fd != (-1))
2204 {
2205 close (conn->fd);
2206 conn->fd = -1;
2207 }
2208 memcpy(conn->challenge, zap_challenge, SH_CHALLENGE_SIZE);
2209 conn->state = CONN_FREE;
2210 conn->headcount = 0;
2211 conn->bytecount = 0;
2212 conn->bytes_to_send = 0;
2213 conn->bytes_to_get = 0;
2214 conn->pass = 0;
2215 conn->timer = 0;
2216 conn->client_entry = NULL;
2217
2218 if (conn->FileName != NULL)
2219 {
2220 SH_FREE(conn->FileName);
2221 conn->FileName = NULL;
2222 }
2223 conn->FileLength = 0;
2224 conn->FileSent = 0;
2225 conn->FileType[0] = '\0';
2226 conn->FileType[1] = '\0';
2227 conn->FileType[2] = '\0';
2228 conn->FileType[3] = '\0';
2229 conn->FileType[4] = '\0';
2230
2231 --server_status.conn_open;
2232
2233 SL_RET0(_("sh_forward_do_free"));
2234}
2235
2236/****************************************
2237 *
2238 * -- Reconfiguration. --
2239 *
2240 * (1) Mark all clients as 'dead'.
2241 * (2) Reload configuration - clients
2242 * in config are non-dead now.
2243 * (3) Remove all clients still
2244 * marked as 'dead'.
2245 */
2246
2247/* -- Mark all clients as dead.
2248 */
2249void sh_forward_mark_dead (void)
2250{
2251 zAVLCursor avlcursor;
2252 client_t * item;
2253
2254 SL_ENTER(_("sh_forward_mark_dead"));
2255
2256 for (item = (client_t *) zAVLFirst(&avlcursor, all_clients); item;
2257 item = (client_t *) zAVLNext(&avlcursor))
2258 {
2259 item->dead_flag = 1;
2260 }
2261 SL_RET0(_("sh_forward_mark_dead"));
2262}
2263
2264
2265/* -- Clean tree from dead clients.
2266 */
2267void sh_forward_clean_tree (void)
2268{
2269 zAVLCursor avlcursor;
2270 client_t * item;
2271
2272 SL_ENTER(_("sh_forward_clean_tree"));
2273
2274 repeat_search:
2275
2276 for (item = (client_t *) zAVLFirst(&avlcursor, all_clients); item;
2277 item = (client_t *) zAVLNext(&avlcursor))
2278 {
2279 if (item->dead_flag == 1)
2280 {
2281 zAVLDelete (all_clients, item->hostname);
2282 free_client (item);
2283 goto repeat_search;
2284 }
2285 }
2286 SL_RET0(_("sh_forward_clean_tree"));
2287}
2288
2289/*
2290 *
2291 **********************************************/
2292
2293
2294
2295/* -- SERVER SEND FUNKTION. --
2296 */
2297void sh_forward_prep_send_int (sh_conn_t * conn,
2298 char * msg, unsigned long length,
2299 char * u, char protocol,
2300 int docrypt)
2301{
2302 /* register unsigned long i; */
2303 unsigned long length2;
2304
2305#ifdef SH_ENCRYPT
2306 unsigned long blkfac = 0;
2307 int rem = 0;
2308 char * p, * q;
2309 RIJ_BYTE inBlock[B_SIZ];
2310 RIJ_BYTE outBlock[B_SIZ];
2311 unsigned int j;
2312 cipherInstance cipherInst;
2313 int err_num;
2314 char expbuf[SH_ERRBUF_SIZE];
2315#else
2316 (void) docrypt;
2317#endif
2318
2319 SL_ENTER(_("sh_forward_prep_send_int"));
2320
2321 TPT((0, FIL__, __LINE__, _("msg=<%s>, docrypt=<%d>\n"), msg, docrypt ));
2322
2323#ifdef SH_ENCRYPT
2324 if ((S_TRUE == docrypt) && ((protocol & SH_PROTO_EN2) != 0) )
2325 {
2326 length2 = length;
2327 }
2328 else if ((S_TRUE == docrypt) && ((protocol & SH_PROTO_ENC) != 0) )
2329 {
2330 blkfac = length/B_SIZ;
2331 rem = length - (B_SIZ * blkfac);
2332 length2 = (B_SIZ * blkfac);
2333 if (rem > 0 && (length2 + B_SIZ) > length2)
2334 length2 += B_SIZ;
2335 else
2336 rem = 0;
2337 }
2338 else
2339 {
2340 length2 = length;
2341 }
2342#else
2343 length2 = length;
2344#endif
2345
2346 conn->headcount = 0;
2347 conn->bytecount = 0;
2348 conn->bytes_to_send = 0;
2349 conn->bytes_to_get = 0;
2350
2351 if (conn->buf != NULL)
2352 {
2353 SH_FREE(conn->buf);
2354 conn->buf = NULL;
2355 }
2356
2357
2358 put_header (conn->head, protocol, &length2, u);
2359 SH_SHOWPROT(conn->head,'>');
2360
2361 TPT((0, FIL__, __LINE__, _("msg=<put_header done>\n") ));
2362
2363 if (msg == NULL)
2364 length2 = 0;
2365
2366#ifdef SH_ENCRYPT
2367 if ((S_TRUE == docrypt) && ((protocol & SH_PROTO_EN2) != 0))
2368 {
2369 TPT((0, FIL__, __LINE__, _("encrypting (version 2)\n")));
2370
2371 conn->buf = sh_tools_makePack (conn->head, msg, length2,
2372 &(conn->client_entry->keyInstE));
2373 }
2374 else if ((S_TRUE == docrypt) && ((protocol & SH_PROTO_ENC) != 0) &&
2375 ((length2 + 1) > length2))
2376 {
2377 conn->buf = SH_ALLOC(length2 + 1);
2378
2379 p = msg;
2380 q = conn->buf;
2381
2382 TPT((0, FIL__, __LINE__, _("encrypting (version 1)\n")));
2383
2384 err_num = cipherInit (&cipherInst, MODE_CBC, NULL);
2385 if (err_num < 0)
2386 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
2387 errorExplain(err_num, expbuf, sizeof(expbuf)),
2388 _("sh_forward_prep_send_int: cipherInit"));
2389
2390 for (j = 0; j < blkfac; ++j)
2391 {
2392 memcpy(inBlock, p, B_SIZ);
2393 err_num = blockEncrypt(&cipherInst, &(conn->client_entry->keyInstE),
2394 inBlock, 128 * BNUM, outBlock);
2395 if (err_num < 0)
2396 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
2397 errorExplain(err_num, expbuf, sizeof(expbuf)),
2398 _("sh_forward_prep_send_int: blockEncrypt"));
2399 memcpy(q, outBlock, B_SIZ);
2400 p += B_SIZ;
2401 q += B_SIZ;
2402 }
2403 if (rem > 0)
2404 {
2405 /* incomplete block at end
2406 */
2407 memset(inBlock, '\0', B_SIZ);
2408 memcpy(inBlock, p, rem);
2409 err_num = blockEncrypt(&cipherInst, &(conn->client_entry->keyInstE),
2410 inBlock, 128 * BNUM, outBlock);
2411 if (err_num < 0)
2412 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
2413 errorExplain(err_num, expbuf, sizeof(expbuf)),
2414 _("sh_forward_prep_send_int: blockEncrypt"));
2415 memcpy(q, outBlock, B_SIZ);
2416 q += B_SIZ;
2417 }
2418
2419 TPT((0, FIL__, __LINE__, _("msg=<encryption done>\n") ));
2420 }
2421 else
2422 {
2423 if ((length2 + 1) < length2) --length2;
2424 conn->buf = SH_ALLOC(length2 + 1);
2425
2426 memcpy(conn->buf, msg, length2);
2427 /*
2428 for (i = 0; i < length2; ++i)
2429 conn->buf[i] = msg[i];
2430 */
2431 conn->buf[length2] = '\0';
2432 TPT((0, FIL__, __LINE__, _("msg=<no encryption done>\n") ));
2433 }
2434#else
2435 if ((length2 + 1) < length2) --length2;
2436 conn->buf = SH_ALLOC(length2 + 1);
2437
2438 memcpy(conn->buf, msg, length2);
2439 /*
2440 for (i = 0; i < length; ++i)
2441 conn->buf[i] = msg[i];
2442 */
2443 conn->buf[length2] = '\0';
2444 TPT((0, FIL__, __LINE__, _("msg=<no encryption done>\n") ));
2445#endif
2446
2447 conn->state = CONN_SENDING;
2448 SL_RET0(_("sh_forward_prep_send_int"));
2449}
2450
2451/* -- Send/Receive. --
2452 */
2453void sh_forward_prep_send (sh_conn_t * conn,
2454 char * msg, unsigned long length,
2455 char * u, char protocol)
2456{
2457 SL_ENTER(_("sh_forward_prep_send"));
2458 sh_forward_prep_send_int (conn, msg, length, u, protocol, S_FALSE);
2459 SL_RET0(_("sh_forward_prep_send"));
2460}
2461
2462void sh_forward_prep_send_crypt (sh_conn_t * conn,
2463 char * msg, unsigned long length,
2464 char * u, char protocol)
2465{
2466 SL_ENTER(_("sh_forward_prep_send_crypt"));
2467 sh_forward_prep_send_int (conn, msg, length, u, protocol, S_TRUE);
2468 SL_RET0(_("sh_forward_prep_send_crypt"));
2469}
2470
2471/* #include <sys/times.h> */
2472
2473#if defined(WITH_EXTERNAL)
2474#include "sh_extern.h"
2475#endif
2476
2477/* -- Update the client status. --
2478 *
2479 * Update the status array for the client,
2480 * and eventually call external program.
2481 */
2482static void status_update (client_t * conn, int status)
2483{
2484#if defined(WITH_EXTERNAL)
2485 char msg[2 * SH_MINIBUF + TIM_MAX + 3];
2486#endif
2487
2488 SL_ENTER(_("status_update"));
2489
2490 if (conn == NULL ||
2491 status < 0 || status >= CLT_MAX)
2492 SL_RET0(_("status_update"));
2493
2494 conn->status_now = status;
2495 conn->status_arr[status] = status;
2496 (void) sh_unix_time(0, conn->timestamp[status], TIM_MAX);
2497
2498#if defined(WITH_EXTERNAL)
2499 sl_snprintf(msg, sizeof(msg), _("%s %s %s"),
2500 conn->hostname, conn->timestamp[status], _(clt_stat[status]));
2501 sh_ext_execute('s', 'r', 'v', msg, 0);
2502#endif
2503
2504 SL_RET0(_("status_update"));
2505}
2506
2507static time_t time_client_limit = 86400;
2508
2509int sh_forward_set_time_limit (const char * c)
2510{
2511 long val;
2512
2513 SL_ENTER(_("sh_forward_set_time_limit"));
2514
2515 val = strtol (c, (char **)NULL, 10);
2516 if (val <= 0)
2517 SL_RETURN( (-1), _("sh_forward_set_time_limit"));
2518
2519 val = (val < 0 ? 0 : val);
2520
2521 time_client_limit = (time_t) val;
2522 SL_RETURN( (0), _("sh_forward_set_time_limit"));
2523}
2524
2525
2526/* -- Check for time limit exceeded. --
2527 */
2528static int client_time_check(void)
2529{
2530 zAVLCursor avlcursor;
2531 client_t * item;
2532
2533 SL_ENTER(_("client_time_check"));
2534
2535 if (time_client_limit == (time_t) 0)
2536 SL_RETURN( 0, _("client_time_check"));
2537
2538 for (item = (client_t *) zAVLFirst(&avlcursor, all_clients); item;
2539 item = (client_t *) zAVLNext(&avlcursor))
2540 {
2541 if (item->exit_flag == 0 && item->last_connect != (time_t) 0)
2542 {
2543 if ( (time(NULL) - item->last_connect) > time_client_limit)
2544 {
2545 if (item->status_now != CLT_TOOLONG)
2546 {
2547 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_TIMEXC,
2548 item->hostname);
2549 status_update (item, CLT_TOOLONG);
2550 }
2551 }
2552 }
2553 }
2554 SL_RETURN( 0, _("client_time_check"));
2555}
2556
2557static int lookup_err = SH_ERR_SEVERE;
2558
2559int sh_forward_lookup_level (const char * c)
2560{
2561 int ci = sh_error_convert_level (c);
2562
2563 SL_ENTER(_("sh_forward_lookup_level"));
2564
2565 if (ci >= 0)
2566 {
2567 lookup_err = ci;
2568 SL_RETURN( 0, _("sh_forward_lookup_level"));
2569 }
2570 else
2571 SL_RETURN( (-1), _("sh_forward_lookup_level"));
2572}
2573
2574#ifndef MAXHOSTNAMELEN
2575#define MAXHOSTNAMELEN 127
2576#endif
2577
2578int check_addr (const char * claim, struct sockaddr_in addr_peer)
2579{
2580 char h_name[MAXHOSTNAMELEN + 1];
2581 char h_peer[MAXHOSTNAMELEN + 1];
2582 char h_peer_IP[16];
2583 char tmp_peer_IP[16];
2584 struct hostent * he;
2585 char ** p = NULL;
2586 int i;
2587 int flag = 0;
2588
2589 SL_ENTER(_("check_addr"));
2590
2591 if (claim == NULL)
2592 {
2593 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_E_SUBGEN,
2594 _("NULL input"), _("check_addr"));
2595 SL_RETURN ((-1), _("check_addr"));
2596 }
2597
2598 /* Make sure we have the canonical name for the client
2599 */
2600 he = sh_gethostbyname (claim);
2601
2602 if (he != NULL && he->h_name != NULL)
2603 {
2604 if (NULL == strchr(he->h_name, '.') && he->h_addr_list != NULL)
2605 {
2606 he = sh_gethostbyaddr(he->h_addr_list[0],
2607 he->h_length,
2608 he->h_addrtype);
2609 }
2610 }
2611
2612 /* copy canonical name into h_name
2613 */
2614 if (he != NULL && he->h_name != NULL)
2615 sl_strlcpy(h_name, he->h_name, MAXHOSTNAMELEN + 1);
2616 else
2617 {
2618 sh_error_handle(lookup_err, FIL__, __LINE__, 0, MSG_TCP_RESCLT,
2619 claim);
2620 SL_RETURN ((0), _("check_addr"));
2621 }
2622
2623
2624 /* get canonical name of socket peer
2625 */
2626 he = sh_gethostbyaddr ((char *) &(addr_peer.sin_addr),
2627 sizeof(addr_peer.sin_addr),
2628 AF_INET);
2629
2630 if (he != NULL && he->h_name != NULL)
2631 {
2632 if (0 == sl_strcmp(he->h_name, _("localhost")))
2633 sl_strlcpy(h_peer, sh.host.name, MAXHOSTNAMELEN + 1);
2634 else
2635 sl_strlcpy(h_peer, he->h_name, MAXHOSTNAMELEN + 1);
2636 }
2637 else
2638 {
2639 sl_strlcpy(tmp_peer_IP,
2640 inet_ntoa (*(struct in_addr *) &(addr_peer.sin_addr)),
2641 16);
2642 sh_error_handle(lookup_err, FIL__, __LINE__, 0, MSG_TCP_RESPEER,
2643 claim, tmp_peer_IP);
2644 SL_RETURN ((0), _("check_addr"));
2645 }
2646
2647 sl_strlcpy(h_peer_IP,
2648 inet_ntoa (*(struct in_addr *) he->h_addr),
2649 16);
2650
2651#if 0
2652 if (S_FALSE == DoReverseLookup)
2653 {
2654 SL_RETURN ((0), _("check_addr"));
2655 }
2656#endif
2657
2658 /* reverse lookup
2659 */
2660 if (0 != sl_strncmp(_("127."),
2661 inet_ntoa (*(struct in_addr *) &(addr_peer.sin_addr)),
2662 4))
2663 {
2664 he = sh_gethostbyname(h_peer);
2665
2666 if (he != NULL)
2667 {
2668 for (p = he->h_addr_list; *p; ++p)
2669 {
2670 if (0 == memcmp (*p, &(addr_peer.sin_addr),
2671 sizeof(addr_peer.sin_addr)))
2672 break;
2673 }
2674 }
2675 if (he == NULL || *p == NULL)
2676 {
2677 sl_strlcpy(tmp_peer_IP,
2678 inet_ntoa (*(struct in_addr *) &(addr_peer.sin_addr)),
2679 16);
2680 sh_error_handle(lookup_err, FIL__, __LINE__, 0, MSG_TCP_LOOKERS,
2681 claim, h_peer, tmp_peer_IP);
2682 SL_RETURN ((0), _("check_addr"));
2683 }
2684 }
2685
2686
2687 if ((0 == sl_strcmp(h_peer, h_name)) || (0 == sl_strcmp(h_peer_IP, h_name)))
2688 {
2689 SL_RETURN ((0), _("check_addr"));
2690 }
2691 else
2692 {
2693 i = 0;
2694 while (he->h_aliases[i] != NULL)
2695 {
2696 if (0 == sl_strcmp(he->h_aliases[i], h_name))
2697 {
2698 flag = 1;
2699 break;
2700 }
2701 ++i;
2702 }
2703 if (flag == 0)
2704 sh_error_handle(lookup_err, FIL__, __LINE__, 0, MSG_TCP_LOOKUP,
2705 claim, h_peer);
2706 }
2707
2708 SL_RETURN ((0), _("check_addr"));
2709}
2710
2711static int UseSocketPeer = S_FALSE;
2712
2713int set_socket_peer (const char * c)
2714{
2715 return sh_util_flagval(c, &UseSocketPeer);
2716}
2717
2718
2719/* -- Search register. --
2720 */
2721client_t * search_register(sh_conn_t * conn, int pos)
2722{
2723 client_t * this_client;
2724 char peer_ip[16];
2725 char peer_name[MAXHOSTNAMELEN+1];
2726 char * search_string;
2727 struct sockaddr_in peer_addr;
2728 struct hostent * he;
2729 char ** p = NULL;
2730
2731 SL_ENTER(_("search_register"));
2732
2733 if (UseSocketPeer == S_TRUE)
2734 {
2735 peer_addr = conn->addr_peer;
2736 sl_strlcpy(peer_ip,
2737 inet_ntoa (*(struct in_addr *) &(peer_addr.sin_addr)), 16);
2738
2739 /* get canonical name of socket peer
2740 */
2741 he = sh_gethostbyaddr ((char *) &(peer_addr.sin_addr),
2742 sizeof(peer_addr.sin_addr),
2743 AF_INET);
2744
2745 if (he != NULL && he->h_name != NULL)
2746 {
2747 if (0 == sl_strcmp(he->h_name, _("localhost")))
2748 sl_strlcpy(peer_name, sh.host.name, MAXHOSTNAMELEN + 1);
2749 else
2750 sl_strlcpy(peer_name, he->h_name, MAXHOSTNAMELEN + 1);
2751
2752 /* Reverse lookup
2753 */
2754 if (0 != sl_strncmp(peer_ip, _("127."), 4))
2755 {
2756 he = sh_gethostbyname(peer_name);
2757
2758 if (he != NULL)
2759 {
2760 for (p = he->h_addr_list; *p; ++p)
2761 {
2762 if (0 == memcmp (*p, &(peer_addr.sin_addr),
2763 sizeof(peer_addr.sin_addr)))
2764 break;
2765 }
2766 }
2767 if (he == NULL || *p == NULL)
2768 {
2769 /*
2770 sh_error_handle(lookup_err, FIL__, __LINE__, 0,
2771 MSG_TCP_LOOKERS,
2772 conn->buf[pos], peer_name, peer_ip);
2773 */
2774 sl_strlcpy(peer_name, peer_ip, MAXHOSTNAMELEN + 1);
2775 }
2776 }
2777 }
2778 else
2779 {
2780 sl_strlcpy(peer_name, peer_ip, MAXHOSTNAMELEN + 1);
2781 }
2782 search_string = peer_name;
2783 }
2784 else
2785 {
2786 search_string = &(conn->buf[pos]);
2787
2788 if (0 != check_addr (search_string, conn->addr_peer))
2789 {
2790 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_BADCONN,
2791 _("Reverse lookup failed"), search_string);
2792 sh_forward_do_free (conn);
2793 SL_RETURN( NULL, _("search_register"));
2794 }
2795 }
2796
2797 /* ---- search the register -----
2798 */
2799 this_client = zAVLSearch(all_clients, search_string);
2800
2801 if (this_client == NULL)
2802 {
2803 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_BADCONN,
2804 _("Not in client list"), search_string);
2805 sh_forward_do_free (conn);
2806 SL_RETURN( NULL, _("search_register"));
2807 }
2808 if (this_client->exit_flag == 1)
2809 {
2810 TPT((0, FIL__, __LINE__, _("msg=<this_client->exit_flag == 1>\n")));
2811 this_client->session_key_timer = (time_t) 0;
2812 this_client->session_key[0] = '\0';
2813 this_client->exit_flag = 0;
2814 }
2815 TPT((0, FIL__, __LINE__, _("msg=<search_register: client %s>\n"),
2816 this_client->hostname));
2817 TPT((0, FIL__, __LINE__, _("msg=<search_register: key %s>\n"),
2818 this_client->session_key));
2819 SL_RETURN( this_client, _("search_register"));
2820}
2821
2822
2823/************************************************************************
2824 *
2825 * Here we check the message received, and decide on the answer to send
2826 * (if any). The connection is in CONN_PAUSED state, thus we must:
2827 * (i) define the proper reaction
2828 * (ii) reset to CONN_READING or CONN_WRITING or CONN_FREE
2829 * (iii) eventually reset the connection entry
2830 *
2831 *************************************************************************/
2832static
2833void check_protocol(sh_conn_t * conn, int state)
2834{
2835 client_t * this_client;
2836
2837 char * cmd;
2838
2839 char hash[SH_MAXMSGLEN + KEY_LEN + KEY_LEN + 1];
2840 char * buffer;
2841
2842 int clt_sev;
2843 char * ptok;
2844
2845 UINT32 ticks;
2846 size_t len;
2847 int i;
2848 char * test;
2849 char u[5] = "OOOO";
2850
2851 SL_TICKET sfd = -1;
2852 char * read_buf = 0;
2853 char * send_buf;
2854 int bytes;
2855
2856#ifdef SH_ENCRYPT
2857 int blkfac;
2858 int rem;
2859 int send_bytes;
2860 int err_num;
2861 char expbuf[SH_ERRBUF_SIZE];
2862#endif
2863
2864
2865#ifdef USE_SRP_PROTOCOL
2866 char * foo_B;
2867 char * foo_Ss;
2868#endif
2869 char hashbuf[KEYBUF_SIZE];
2870 char sigbuf[KEYBUF_SIZE];
2871
2872 SL_ENTER(_("check_protocol"));
2873
2874 /* seed / re-seed the PRNG if required
2875 */
2876 (void) taus_seed();
2877
2878
2879 /* protocols:
2880 * -- (iii) file transfer
2881 * -- (ii) authenticated message transfer
2882 * -- (i) SRP key exchange
2883 */
2884
2885 /* --------- FILE TRANSFER -----------
2886 */
2887 if ( (conn->head[0] & SH_PROTO_SRP) == 0 &&
2888 (conn->head[0] & SH_PROTO_BIG) != 0 /* is set */ )
2889 {
2890
2891 if (state == SH_DO_READ) /* finished reading */
2892 {
2893 TPT(( 0, FIL__, __LINE__, _("msg=<File transfer - entry.>\n")));
2894
2895 /* -- Client requests challenge. --
2896 */
2897 if (0 == check_request_nerr ((char *) &(conn->head[3]), _("HELO")))
2898 {
2899
2900 TPT(( 0, FIL__, __LINE__,
2901 _("msg=<File transfer - HELO (1).>\n")));
2902
2903 if (conn->buf == NULL || sl_strlen(conn->buf) <= KEY_LEN)
2904 {
2905 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_NOCLT);
2906 sh_forward_do_free (conn);
2907 SL_RET0(_("check_protocol"));
2908 }
2909
2910 /* ---- search the register -----
2911 */
2912
2913 this_client = search_register (conn, KEY_LEN);
2914 if (this_client == NULL)
2915 SL_RET0(_("check_protocol"));
2916
2917 /* ---- force authentication -----
2918 */
2919
2920 if (this_client->session_key[0] == '\0' ||
2921 (time(NULL) - this_client->session_key_timer)
2922 > (time_t) TIMEOUT_KEY )
2923 {
2924 /* fake an auth request and jump there
2925 */
2926 conn->head[0] = (conn->head[0] | SH_PROTO_SRP);
2927 conn->head[3] = 'S';
2928 conn->head[4] = 'A';
2929 conn->head[5] = 'L';
2930 conn->head[6] = 'T';
2931 if (flag_err_info == SL_TRUE)
2932 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_FAUTH,
2933 &(conn->buf[KEY_LEN]));
2934 len = sl_strlen(&(conn->buf[KEY_LEN])) + 1;
2935 /* &(conn->buf[KEY_LEN]) is hostname */
2936 /* may overlap, thus only memmove is correct */
2937 memmove(conn->buf, &(conn->buf[KEY_LEN]), len);
2938 this_client->session_key[0] = '\0';
2939 this_client->session_key_timer = (time_t) 1;
2940 goto servInit;
2941 }
2942
2943 /* --- check whether hostname is properly signed ---
2944 */
2945 if (conn->K != NULL)
2946 {
2947 SH_FREE(conn->K);
2948 conn->K = NULL;
2949 }
2950
2951 /* FIXME
2952 len = sl_strlen(&(conn->buf[KEY_LEN])) + 1;
2953 if (sl_ok_adds(len, KEY_LEN))
2954 len += KEY_LEN;
2955 len = (len < (KEY_LEN+1)) ? (KEY_LEN+1) : len;
2956 */
2957 conn->K = SH_ALLOC(KEY_LEN+1);
2958
2959 sl_strlcpy (conn->K,
2960 sh_util_siggen(this_client->session_key,
2961 &(conn->buf[KEY_LEN]),
2962 sl_strlen(&(conn->buf[KEY_LEN])),
2963 sigbuf, sizeof(sigbuf)),
2964 KEY_LEN+1);
2965 TPT((0, FIL__, __LINE__, _("msg=<host %s>\n"),
2966 &(conn->buf[KEY_LEN])));
2967 TPT((0, FIL__, __LINE__, _("msg=<ckey %s>\n"),
2968 this_client->session_key));
2969 TPT((0, FIL__, __LINE__, _("msg=<sign %s.>\n"),
2970 sh_util_siggen(this_client->session_key,
2971 &(conn->buf[KEY_LEN]),
2972 sl_strlen(&(conn->buf[KEY_LEN])),
2973 sigbuf, sizeof(sigbuf))));
2974
2975 if (0 != sl_strncmp(conn->K, conn->buf, KEY_LEN))
2976 {
2977 TPT((0, FIL__, __LINE__, _("msg=<clt %s>\n"), conn->buf));
2978 TPT((0, FIL__, __LINE__, _("msg=<srv %s>\n"), conn->K));
2979 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_BADCONN,
2980 _("Signature mismatch"),
2981 &(conn->buf[KEY_LEN]));
2982
2983 this_client->session_key_timer =
2984 time(NULL) - (2*TIMEOUT_KEY);
2985
2986 sh_forward_do_free (conn);
2987 SL_RET0(_("check_protocol"));
2988 }
2989 SH_FREE(conn->K);
2990 conn->K = NULL;
2991
2992 /* --- create and send a nonce ---
2993 */
2994
2995 conn->client_entry = this_client;
2996 sl_strlcpy (conn->peer, &(conn->buf[KEY_LEN]), SH_MINIBUF+1);
2997
2998 ticks = (UINT32) taus_get ();
2999
3000 if (conn->K != NULL)
3001 {
3002 SH_FREE(conn->K);
3003 conn->K = NULL;
3004 }
3005 conn->K = SH_ALLOC(KEY_LEN+1);
3006 sl_strlcpy (conn->K,
3007 sh_tiger_hash ((char *) &ticks,
3008 TIGER_DATA, sizeof(UINT32),
3009 hashbuf, sizeof(hashbuf)),
3010 KEY_LEN+1);
3011
3012 TPT((0, FIL__, __LINE__, _("msg=<send nonce>\n")));
3013 sh_forward_prep_send (conn, conn->K, KEY_LEN+1, _("NSRV"),
3014 SH_PROTO_BIG);
3015 }
3016
3017 /* --- Client has send a message. Check state and message. ---
3018 */
3019 else if (0 == check_request_nerr((char *)&(conn->head[3]), _("NCLT")) &&
3020 conn->client_entry != NULL &&
3021 sl_strlen(conn->buf) > KEY_LEN &&
3022 conn->K != NULL)
3023 {
3024
3025 TPT(( 0, FIL__, __LINE__,
3026 _("msg=<File transfer - NCLT (3).>\n")));
3027
3028 /* --- get client nonce and compute hash ---
3029 */
3030 if (conn->A != NULL)
3031 {
3032 SH_FREE(conn->A);
3033 conn->A = NULL;
3034 }
3035 conn->A = SH_ALLOC(3*KEY_LEN+1);
3036 sl_strlcpy (conn->A, conn->K, KEY_LEN+1);
3037 sl_strlcat(conn->A, conn->buf, /* truncate */
3038 2*KEY_LEN+1);
3039 sl_strlcat(conn->A, conn->client_entry->session_key,
3040 3*KEY_LEN+1);
3041 sl_strlcpy (conn->K, sh_tiger_hash(conn->A,TIGER_DATA,3*KEY_LEN,
3042 hashbuf, sizeof(hashbuf)),
3043 KEY_LEN+1);
3044 SH_FREE(conn->A);
3045 conn->A = NULL;
3046
3047
3048#ifdef SH_ENCRYPT
3049 if ((conn->client_entry->encf_flag != 0) &&
3050 ((conn->head[0] & SH_PROTO_ENC) == 0))
3051 {
3052 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_MISENC,
3053 _("file download"),
3054#ifdef SH_ENCRYPT_2
3055 _("version2"),
3056#else
3057 _("version1"),
3058#endif
3059 _("none"));
3060 if (sl_strlen(conn->buf) > (KEY_LEN + 5)) {
3061 if (sh_tools_hash_vfy(conn->K, conn->buf, KEY_LEN+5)) {
3062 if (conn->buf[KEY_LEN+4] == conn->head[0]) {
3063 /* conn->client_entry->encf_flag = 0 */ ; /* FIXME */
3064 }
3065 }
3066 }
3067 }
3068 else if ((conn->client_entry->encf_flag != 0) &&
3069 ((conn->head[0] & SH_MASK_ENC) !=
3070 conn->client_entry->encf_flag))
3071 {
3072 sh_error_handle(SH_ERR_NOTICE, FIL__, __LINE__, 0,
3073 MSG_TCP_MISENC,
3074 _("file download"),
3075#ifdef SH_ENCRYPT_2
3076 _("version2"),
3077#else
3078 _("version1"),
3079#endif
3080 ((conn->head[0] & SH_PROTO_EN2) == SH_PROTO_EN2) ? _("version2") : _("version1")
3081 );
3082 conn->client_entry->encf_flag =
3083 (conn->head[0] & SH_MASK_ENC);
3084 }
3085#else
3086 if ((conn->head[0] & SH_PROTO_ENC) != 0)
3087 {
3088 sh_error_handle((-1), FIL__, __LINE__, 0,
3089 MSG_TCP_MISENC,
3090 _("file download"),
3091 _("none"),
3092 ((conn->head[0] & SH_PROTO_EN2) == SH_PROTO_EN2) ? _("version2") : _("version1"));
3093 }
3094#endif
3095
3096
3097 /* ---- K = H(NSRV, NCLT, session_key) -------
3098 */
3099
3100 if (conn->FileName != NULL)
3101 {
3102 SH_FREE(conn->FileName);
3103 conn->FileName = NULL;
3104 }
3105
3106 if (0 == sl_strncmp (_("CONF"), &(conn->buf[KEY_LEN]), 4))
3107 {
3108 strcpy(conn->FileType, _("CONF")); /* known to fit */
3109 conn->FileName = get_client_conf_file(conn->peer,
3110 &(conn->FileLength));
3111 conn->FileSent = 0;
3112 }
3113 else if (0 == sl_strncmp (_("DATA"), &(conn->buf[KEY_LEN]), 4))
3114 {
3115 strcpy(conn->FileType, _("DATA")); /* known to fit */
3116 conn->FileName = get_client_data_file(conn->peer,
3117 &(conn->FileLength));
3118 conn->FileSent = 0;
3119 }
3120 else
3121 {
3122 ptok = sh_util_safe_name(&(conn->buf[KEY_LEN]));
3123 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_FFILE,
3124 conn->peer,
3125 ptok);
3126 SH_FREE(ptok);
3127 status_update (conn->client_entry, CLT_FAILED);
3128 sh_forward_do_free (conn);
3129 }
3130
3131 bytes = -1;
3132
3133 if (conn != NULL && conn->FileName != NULL)
3134 {
3135 sfd = sl_open_read(conn->FileName, SL_YESPRIV);
3136 if (!SL_ISERROR(sfd))
3137 {
3138 read_buf = SH_ALLOC(TRANS_BYTES);
3139 bytes = sl_read (sfd, read_buf, TRANS_BYTES);
3140 sl_close(sfd);
3141 }
3142
3143 else
3144 {
3145 sh_error_handle((-1), FIL__, __LINE__, sfd,
3146 MSG_E_ACCESS,
3147 (long) geteuid(),
3148 conn->FileName);
3149 }
3150 if (bytes >= 0)
3151 {
3152#ifdef SH_ENCRYPT
3153 /* need to send N * B_SIZ bytes
3154 */
3155 blkfac = bytes / B_SIZ;
3156 rem = bytes - (blkfac * B_SIZ);
3157 if (rem != 0)
3158 {
3159 memset(&read_buf[bytes], '\n', (B_SIZ-rem));
3160 ++blkfac;
3161 send_bytes = blkfac * B_SIZ;
3162 }
3163 else
3164 send_bytes = bytes;
3165
3166 send_buf = hash_me(conn->K, read_buf,
3167 send_bytes);
3168
3169 sh_forward_prep_send_crypt (conn, send_buf,
3170 send_bytes+KEY_LEN,
3171 _("FILE"),
3172 SH_PROTO_BIG|conn->client_entry->encf_flag);
3173#else
3174 send_buf = hash_me(conn->K, read_buf, bytes);
3175 sh_forward_prep_send_crypt (conn, send_buf,
3176 bytes+KEY_LEN,
3177 _("FILE"), SH_PROTO_BIG);
3178#endif
3179 conn->FileSent += bytes;
3180 if (send_buf != NULL)
3181 {
3182 SH_FREE(send_buf);
3183 }
3184 SH_FREE(read_buf);
3185 }
3186 }
3187
3188 if (conn == NULL || conn->FileName == NULL ||
3189 SL_ISERROR(sfd) || bytes < 0)
3190 {
3191 sh_error_handle((-1), FIL__, __LINE__, sfd, MSG_TCP_NFILE,
3192 conn->peer,
3193 (conn->FileName == NULL) ?
3194 _("(NULL)") : conn->FileName);
3195 status_update (conn->client_entry, CLT_FAILED);
3196 sh_forward_do_free (conn);
3197 }
3198
3199 }
3200
3201 else if (0 == check_request_nerr((char *)&(conn->head[3]),
3202 _("RECV")) &&
3203 conn->client_entry != NULL &&
3204 conn->K != NULL &&
3205 conn->FileName != NULL)
3206 {
3207
3208 TPT(( 0, FIL__, __LINE__,
3209 _("msg=<File transfer - RCVT (5+).>\n")));
3210
3211 if (conn->FileSent == conn->FileLength)
3212 {
3213 send_buf = hash_me(conn->K, conn->peer,
3214 sl_strlen(conn->peer));
3215#ifdef SH_ENCRYPT
3216 sh_forward_prep_send_crypt (conn, send_buf,
3217 sl_strlen(conn->peer)+KEY_LEN,
3218 _("EEOT"),
3219 SH_PROTO_BIG|conn->client_entry->encf_flag);
3220#else
3221 sh_forward_prep_send_crypt (conn, send_buf,
3222 sl_strlen(conn->peer)+KEY_LEN,
3223 _("EEOT"),
3224 SH_PROTO_BIG);
3225#endif
3226 SH_FREE(send_buf);
3227 }
3228 else
3229 {
3230 bytes = -1;
3231 sfd = sl_open_read(conn->FileName, SL_YESPRIV);
3232 if (!SL_ISERROR(sfd))
3233 {
3234 read_buf = SH_ALLOC(TRANS_BYTES);
3235 sl_seek (sfd, (off_t) conn->FileSent);
3236 bytes = sl_read (sfd, read_buf, TRANS_BYTES);
3237 sl_close(sfd);
3238 }
3239 else
3240 {
3241 sh_error_handle((-1), FIL__, __LINE__, sfd,
3242 MSG_E_ACCESS,
3243 (long) geteuid(),
3244 conn->FileName);
3245 }
3246 if (bytes >= 0)
3247 {
3248#ifdef SH_ENCRYPT
3249 /* need to send N * B_SIZ bytes
3250 */
3251 blkfac = bytes / B_SIZ;
3252 rem = bytes - (blkfac * B_SIZ);
3253 if (rem != 0)
3254 {
3255 memset(&read_buf[bytes], '\n', (B_SIZ-rem));
3256 ++blkfac;
3257 send_bytes = blkfac * B_SIZ;
3258 }
3259 else
3260 send_bytes = bytes;
3261
3262 send_buf = hash_me(conn->K, read_buf,
3263 send_bytes);
3264
3265 sh_forward_prep_send_crypt (conn, send_buf,
3266 send_bytes+KEY_LEN,
3267 _("FILE"),
3268 SH_PROTO_BIG|conn->client_entry->encf_flag);
3269#else
3270
3271 send_buf = hash_me(conn->K, read_buf, bytes);
3272 sh_forward_prep_send_crypt (conn, send_buf,
3273 bytes+KEY_LEN,
3274 _("FILE"),
3275 SH_PROTO_BIG);
3276#endif
3277
3278 conn->FileSent += bytes;
3279 SH_FREE(send_buf);
3280 SH_FREE(read_buf);
3281 }
3282 else
3283 {
3284 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_NFILE,
3285 conn->peer,
3286 (conn->FileName == NULL) ?
3287 _("(NULL)") : conn->FileName);
3288 status_update (conn->client_entry, CLT_FAILED);
3289 sh_forward_do_free (conn);
3290 }
3291 }
3292 }
3293
3294
3295 else if (0 == check_request_nerr((char *)&(conn->head[3]),
3296 _("EOTE")) &&
3297 conn->client_entry != NULL)
3298 {
3299
3300 TPT(( 0, FIL__, __LINE__,
3301 _("msg=<File transfer - EOTE (7).>\n")));
3302
3303 if (flag_err_info == SL_TRUE)
3304 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_OKFILE,
3305 conn->peer);
3306
3307 if ((conn->client_entry->status_now != CLT_SUSPEND) &&
3308 (conn->client_entry->status_now != CLT_TOOLONG))
3309 { status_update (conn->client_entry, CLT_FILE); }
3310 else
3311 { conn->client_entry->session_key[0] = '\0'; }
3312 conn->client_entry->last_connect = time (NULL);
3313 sh_forward_do_free (conn);
3314 }
3315
3316
3317 /* client does something unexpected
3318 */
3319 else /* ---- ??? ----- */
3320 {
3321 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_FINV,
3322 1, conn->pass, conn->peer,
3323 '\\', conn->head[3], '\\',conn->head[4],
3324 '\\', conn->head[5], '\\',conn->head[6]);
3325 status_update (conn->client_entry, CLT_FAILED);
3326 sh_forward_do_free (conn);
3327 }
3328 }
3329
3330 else if (state == SH_DO_WRITE) /* finished writing */
3331 {
3332 TPT(( 0, FIL__, __LINE__, _("msg=<File transfer - (wait).>\n")));
3333
3334 /* challenge is sent, now wait for message from client
3335 */
3336 conn->headcount = 0;
3337 conn->bytecount = 0;
3338 conn->bytes_to_send = 0;
3339 conn->bytes_to_get = 0;
3340 if (conn->buf != NULL)
3341 {
3342 SH_FREE(conn->buf);
3343 conn->buf = NULL;
3344 }
3345 conn->state = CONN_READING;
3346 }
3347 SL_RET0(_("check_protocol"));
3348 }
3349
3350 /* --------- message exchange -----------
3351 */
3352 if ((conn->head[0] & SH_PROTO_SRP) == 0 &&
3353 (conn->head[0] & SH_PROTO_MSG) != 0 /* is set */ )
3354 {
3355
3356 if (state == SH_DO_READ) /* finished reading */
3357 {
3358
3359 TPT(( 0, FIL__, __LINE__, _("msg=<Message transfer - entry.>\n")));
3360
3361 /* client requests challenge
3362 */
3363 if (0 == check_request_nerr ((char *)&(conn->head[3]), _("HELO")))
3364 {
3365
3366 TPT(( 0, FIL__, __LINE__,
3367 _("msg=<Message transfer - HELO (1).>\n")));
3368
3369 if (conn->buf == NULL || sl_strlen(conn->buf) <= KEY_LEN )
3370 {
3371 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_NOCLT);
3372 sh_forward_do_free (conn);
3373 SL_RET0(_("check_protocol"));
3374 }
3375
3376 TPT(( 0, FIL__, __LINE__, _("msg=<Rcvt %s.>\n"), conn->buf));
3377
3378 /* ---- search the register -----
3379 */
3380 this_client = search_register (conn, KEY_LEN);
3381 if (NULL == this_client)
3382 SL_RET0(_("check_protocol"));
3383
3384 /* ---- force authentication -----
3385 */
3386 if ( (this_client->session_key[0] == '\0') ||
3387 ((time(NULL)-this_client->session_key_timer)
3388 > (time_t) TIMEOUT_KEY)
3389 )
3390 {
3391
3392 /* fake an auth request and jump there
3393 */
3394 conn->head[0] = (conn->head[0] | SH_PROTO_SRP);
3395 conn->head[3] = 'S';
3396 conn->head[4] = 'A';
3397 conn->head[5] = 'L';
3398 conn->head[6] = 'T';
3399 if (flag_err_info == SL_TRUE)
3400 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_FAUTH,
3401 &(conn->buf[KEY_LEN]));
3402 len = sl_strlen(&(conn->buf[KEY_LEN])) + 1;
3403 /* &(conn->buf[KEY_LEN]) is hostname */
3404 /* may overlap, thus only memmove is correct */
3405 memmove(conn->buf, &(conn->buf[KEY_LEN]), len);
3406 this_client->session_key[0] = '\0';
3407 this_client->session_key_timer = (time_t) 1;
3408
3409 goto servInit;
3410 }
3411
3412 /* check whether hostname is properly signed
3413 */
3414 if (conn->K != NULL)
3415 {
3416 SH_FREE(conn->K);
3417 conn->K = NULL;
3418 }
3419 /* FIXME len = sl_strlen(&(conn->buf[KEY_LEN])) + KEY_LEN + 1; */
3420 conn->K = SH_ALLOC(KEY_LEN + 1);
3421
3422 sl_strlcpy (conn->K,
3423 sh_util_siggen(this_client->session_key,
3424 &(conn->buf[KEY_LEN]),
3425 sl_strlen(&(conn->buf[KEY_LEN])),
3426 sigbuf, sizeof(sigbuf)),
3427 KEY_LEN+1);
3428 TPT((0, FIL__, __LINE__, _("msg=<host %s>\n"),
3429 &(conn->buf[KEY_LEN])));
3430 TPT((0, FIL__, __LINE__, _("msg=<ckey %s>\n"),
3431 this_client->session_key));
3432 TPT((0, FIL__, __LINE__, _("msg=<sign %s>\n"), conn->K));
3433
3434 if (0 != sl_strncmp(conn->K, conn->buf, KEY_LEN))
3435 {
3436 TPT(( 0, FIL__, __LINE__, _("msg=<Rcvt %s>\n"), conn->buf));
3437 TPT(( 0, FIL__, __LINE__, _("msg=<Want %s>\n"), conn->K));
3438 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_BADCONN,
3439 _("Signature mismatch"),
3440 &(conn->buf[KEY_LEN]));
3441
3442 this_client->session_key_timer =
3443 time(NULL) - (2*TIMEOUT_KEY);
3444
3445 sh_forward_do_free (conn);
3446 SL_RET0(_("check_protocol"));
3447 }
3448 SH_FREE(conn->K);
3449 conn->K = NULL;
3450
3451 /* -- create a nonce and send it --
3452 */
3453
3454 conn->client_entry = this_client;
3455 sl_strlcpy (conn->peer, &(conn->buf[KEY_LEN]), SH_MINIBUF+1);
3456
3457 ticks = (UINT32) taus_get ();
3458
3459 test = (char *) &ticks;
3460 sh_util_cpylong (conn->challenge, test, 4);
3461 conn->challenge[4] = '\0';
3462 for (i = 0; i < 4; ++i)
3463 if (conn->challenge[i] == '\0')
3464 conn->challenge[i] = 0x01;
3465
3466 sh_forward_prep_send (conn, conn->challenge, 5, _("TALK"),
3467 SH_PROTO_MSG);
3468 TPT(( 0, FIL__, __LINE__, _("msg=<Sent %s.>\n"),
3469 hu_trans(conn->challenge)));
3470 }
3471
3472 /* Client has send a message. Check whether we are in proper
3473 * state, and verify message.
3474 */
3475 else if (0 ==
3476 check_request_nerr((char *)&(conn->head[3]), _("MESG")) &&
3477 conn->client_entry != NULL &&
3478 conn->client_entry->session_key[0] != '\0' &&
3479 (len = sl_strlen(conn->buf) - KEY_LEN) > 0 &&
3480 sl_strlen(conn->challenge) == 4)
3481 {
3482 TPT(( 0, FIL__, __LINE__,
3483 _("msg=<Message transfer - MESG (3).>\n")));
3484
3485#ifdef SH_ENCRYPT
3486 if (conn->client_entry->encf_flag == 0) {
3487 conn->client_entry->ency_flag = 0;
3488 }
3489 if ((conn->client_entry->ency_flag != 0) &&
3490 ((conn->head[0] & SH_PROTO_ENC) == 0))
3491 {
3492 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_MISENC,
3493 _("message transfer"),
3494#ifdef SH_ENCRYPT_2
3495 _("version2"),
3496#else
3497 _("version1"),
3498#endif
3499 _("none"));
3500 /* conn->client_entry->ency_flag = 0; */
3501 }
3502 else if ((conn->client_entry->ency_flag != 0) &&
3503 ((conn->head[0] & SH_MASK_ENC) !=
3504 conn->client_entry->ency_flag))
3505 {
3506 sh_error_handle(SH_ERR_NOTICE, FIL__, __LINE__, 0,
3507 MSG_TCP_MISENC,
3508 _("message transfer"),
3509#ifdef SH_ENCRYPT_2
3510 _("version2"),
3511#else
3512 _("version1"),
3513#endif
3514 ((conn->head[0] & SH_PROTO_EN2) == SH_PROTO_EN2) ? _("version2") : _("version1"));
3515 conn->client_entry->ency_flag =
3516 (conn->head[0] & SH_MASK_ENC);
3517 }
3518#else
3519 if ((conn->head[0] & SH_PROTO_ENC) != 0)
3520 {
3521 sh_error_handle((-1), FIL__, __LINE__, 0,
3522 MSG_TCP_MISENC,
3523 _("message transfer"),
3524 _("none"),
3525 ((conn->head[0] & SH_PROTO_EN2) == SH_PROTO_EN2) ? _("version2") : _("version1"));
3526 }
3527#endif
3528
3529 TPT(( 0, FIL__, __LINE__, _("msg=<Rcvt %s.>\n"), conn->buf));
3530 /* get hash from message end, truncate message
3531 */
3532 sl_strlcpy(hash, &(conn->buf[len]), KEY_LEN+1);
3533 conn->buf[len] = '\0';
3534
3535 /* verify hash
3536 */
3537 buffer = sh_util_strconcat(conn->buf, conn->challenge, NULL);
3538 i = sl_strncmp(hash,
3539 sh_util_siggen(conn->client_entry->session_key,
3540 buffer,
3541 sl_strlen(buffer),
3542 sigbuf, sizeof(sigbuf)),
3543 KEY_LEN);
3544 TPT((0, FIL__, __LINE__, _("msg=<sign %s.>\n"),
3545 sh_util_siggen(conn->client_entry->session_key,
3546 buffer,
3547 sl_strlen(buffer),
3548 sigbuf, sizeof(sigbuf))));
3549
3550
3551 if (0 != i)
3552 {
3553 TPT((0, FIL__, __LINE__, _("msg=<update status>\n")));
3554 status_update (conn->client_entry, CLT_FAILED);
3555 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_BADCONN,
3556 _("Msg signature mismatch"), conn->peer);
3557 conn->client_entry->session_key_timer =
3558 time(NULL) - (2*TIMEOUT_KEY);
3559 sh_forward_do_free (conn);
3560 SL_RET0(_("check_protocol"));
3561 }
3562 else
3563 {
3564 conn->client_entry->last_connect = time (NULL);
3565
3566 if (NULL != sl_strstr(conn->buf, _("EXIT")))
3567 {
3568 TPT((0, FIL__, __LINE__, _("msg=<update status>\n")));
3569 conn->client_entry->exit_flag = 1;
3570 status_update (conn->client_entry, CLT_EXITED);
3571 }
3572 else if (NULL != sl_strstr(conn->buf, _("PANIC")))
3573 {
3574 TPT((0, FIL__, __LINE__, _("msg=<update status>\n")));
3575 status_update (conn->client_entry, CLT_PANIC);
3576 }
3577 else if (NULL != sl_strstr(conn->buf, _("SUSPEND")))
3578 {
3579 TPT((0, FIL__, __LINE__, _("msg=<update status>\n")));
3580 status_update (conn->client_entry, CLT_SUSPEND);
3581 }
3582 else if (NULL != sl_strstr(conn->buf, _("POLICY")))
3583 {
3584 TPT((0, FIL__, __LINE__, _("msg=<update status>\n")));
3585 status_update (conn->client_entry, CLT_POLICY);
3586 }
3587 else if (NULL != sl_strstr(conn->buf,
3588 _("File check completed")))
3589 {
3590 TPT((0, FIL__, __LINE__, _("msg=<update status>\n")));
3591 status_update (conn->client_entry, CLT_CHECK);
3592 }
3593 else if (NULL != sl_strstr(conn->buf, _("START")))
3594 {
3595 TPT((0, FIL__, __LINE__, _("msg=<update status>\n")));
3596 sh_socket_add2reload (conn->client_entry->hostname);
3597 if (conn->client_entry->status_now == CLT_SUSPEND) {
3598 status_update (conn->client_entry, CLT_ILLEGAL);
3599 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_ILL,
3600 conn->peer);
3601 }
3602 else
3603 status_update (conn->client_entry, CLT_STARTED);
3604 }
3605 else
3606 {
3607 TPT((0, FIL__, __LINE__, _("msg=<update status>\n")));
3608 if (0 != sl_strcmp(conn->buf,
3609 _("Runtime configuration reloaded")))
3610 {
3611 sh_socket_add2reload (conn->client_entry->hostname);
3612 }
3613 status_update (conn->client_entry, CLT_MSG);
3614 }
3615
3616 TPT((0, FIL__, __LINE__, _("msg=<status updated>\n")));
3617 clt_sev = atoi(conn->buf);
3618 clt_class = (-1);
3619 ptok = strchr(conn->buf, '?');
3620 if (ptok != NULL)
3621 {
3622 ++ptok;
3623 if (ptok != NULL && sh.flag.client_class == S_TRUE)
3624 clt_class = atoi(ptok); /* is a global */
3625 ptok = strchr(ptok, '?');
3626 if (ptok != NULL)
3627 ++ptok;
3628 }
3629 if (sh.flag.client_severity == S_FALSE)
3630 clt_sev = (-1);
3631
3632 /* here we expect an xml formatted message, thus we don't
3633 escape xml special chars (flag == 0) */
3634 ptok =
3635 sh_tools_safe_name ((ptok!=NULL) ? ptok : conn->buf, 0);
3636
3637 /* push client name to error routine
3638 */
3639 sh_error_set_peer(sh_strip_domain (conn->peer));
3640 sh_error_handle(clt_sev, FIL__, __LINE__, 0, MSG_TCP_MSG,
3641 sh_strip_domain (conn->peer),
3642 ptok);
3643 sh_error_set_peer(NULL);
3644
3645 TPT((0, FIL__, __LINE__, _("msg=<%s>\n"), ptok));
3646 SH_FREE(ptok);
3647 clt_class = (-1);
3648 }
3649 memset(buffer, '\0', sl_strlen(buffer));
3650 SH_FREE(buffer);
3651
3652 /* SERVER CONF SEND
3653 */
3654 buffer = sh_util_strconcat(conn->buf,
3655 conn->challenge,
3656 NULL);
3657 sl_strlcpy(hash,
3658 sh_util_siggen ( conn->client_entry->session_key,
3659 buffer,
3660 sl_strlen(buffer),
3661 sigbuf, sizeof(sigbuf)),
3662 KEY_LEN+1);
3663
3664 /* --- SERVER CMD --- */
3665 cmd = sh_socket_check (conn->peer);
3666
3667 if (cmd != NULL)
3668 {
3669 /* max cmd size is SH_MAXMSGLEN bytes
3670 */
3671 sl_strlcpy(&hash[KEY_LEN], cmd, SH_MAXMSGLEN);
3672 sl_strlcat(&hash[KEY_LEN],
3673 sh_util_siggen ( conn->client_entry->session_key,
3674 &hash[KEY_LEN],
3675 sl_strlen(&hash[KEY_LEN]),
3676 sigbuf, sizeof(sigbuf)),
3677 SH_MAXMSGLEN+KEY_LEN+1);
3678
3679 TPT((0, FIL__, __LINE__, _("CONF SEND <0> <%s>\n"),
3680 &hash[KEY_LEN]));
3681
3682 } else {
3683
3684 TPT((0, FIL__, __LINE__, _("CONF SEND <0> <[NULL]>\n")));
3685
3686 }
3687 /* --- SERVER CMD END --- */
3688
3689 TPT((0, FIL__, __LINE__, _("msg=<sign %s.>\n"),
3690 sh_util_siggen(conn->client_entry->session_key,
3691 buffer,
3692 sl_strlen(buffer),
3693 sigbuf, sizeof(sigbuf))));
3694
3695#ifdef SH_ENCRYPT
3696 sh_forward_prep_send_crypt (conn, hash,
3697 sl_strlen(hash) /* KEY_LEN */,
3698 _("CONF"),
3699 SH_PROTO_MSG|SH_PROTO_END|conn->client_entry->ency_flag);
3700#else
3701 sh_forward_prep_send_crypt (conn, hash,
3702 sl_strlen(hash) /* KEY_LEN */,
3703 _("CONF"),
3704 SH_PROTO_MSG|SH_PROTO_END);
3705#endif
3706
3707 memset(buffer, '\0', sl_strlen(buffer));
3708 SH_FREE(buffer);
3709
3710 /* sh_forward_do_free (conn); */
3711 }
3712
3713 /* client does something unexpected
3714 */
3715 else /* ---- ??? ----- */
3716 {
3717 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_FINV,
3718 2, conn->pass, conn->peer,
3719 '\\', conn->head[3], '\\',conn->head[4],
3720 '\\', conn->head[5], '\\',conn->head[6]);
3721 status_update (conn->client_entry, CLT_FAILED);
3722 conn->client_entry->session_key_timer =
3723 time(NULL) - (2*TIMEOUT_KEY);
3724 sh_forward_do_free (conn);
3725 }
3726 }
3727 else if (state == SH_DO_WRITE) /* finished writing */
3728 {
3729 if (0 != (conn->head[0] & SH_PROTO_END))
3730 {
3731 if (flag_err_debug == SL_TRUE)
3732 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_OKMSG,
3733 sh_strip_domain (conn->peer));
3734 sh_forward_do_free (conn);
3735 SL_RET0(_("check_protocol"));
3736 }
3737
3738 TPT(( 0, FIL__, __LINE__, _("msg=<Msg transfer - (wait).>\n")));
3739
3740 /* challenge is sent, now wait for message from client
3741 */
3742 conn->headcount = 0;
3743 conn->bytecount = 0;
3744 conn->bytes_to_send = 0;
3745 conn->bytes_to_get = 0;
3746 if (conn->buf != NULL)
3747 {
3748 SH_FREE(conn->buf);
3749 conn->buf = NULL;
3750 }
3751 conn->state = CONN_READING;
3752 }
3753 TPT((0, FIL__, __LINE__, _("msg=<return>\n") ));
3754 SL_RET0(_("check_protocol"));
3755 }
3756
3757 /* --------- authentication -----------
3758 */
3759
3760 /* entry point for jump from message forward if session key must
3761 * be re-initialized
3762 */
3763 servInit:
3764
3765 if ( (conn->head[0] & SH_PROTO_SRP) != 0 /* is set */ )
3766 {
3767
3768#ifndef USE_SRP_PROTOCOL
3769
3770 if (state == SH_DO_READ) /* finished reading */
3771 {
3772 TPT((0, FIL__, __LINE__, _("msg=<Authentication - entry.>\n")));
3773
3774 /* first pass -- client request salt
3775 */
3776 if (conn->pass == 1)
3777 {
3778
3779 TPT((0, FIL__, __LINE__,
3780 _("msg=<Authentication - SALT (1).>\n")));
3781
3782 if (conn->buf == NULL || sl_strlen(conn->buf) == 0)
3783 {
3784 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_NOCLT);
3785 sh_forward_do_free (conn);
3786 SL_RET0(_("check_protocol"));
3787 }
3788
3789
3790 /* search the register
3791 */
3792
3793 this_client = search_register (conn, 0);
3794 if (NULL == this_client)
3795 SL_RET0(_("check_protocol"));
3796
3797
3798 conn->client_entry = this_client;
3799 sl_strlcpy (conn->peer, conn->buf, SH_MINIBUF+1);
3800
3801 if (0 != check_request_s((char *)&(conn->head[3]),
3802 _("SALT"),conn->peer))
3803 {
3804 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_BADCONN,
3805 _("No salt requested"), conn->peer);
3806 status_update (conn->client_entry, CLT_FAILED);
3807 conn->client_entry->session_key_timer =
3808 time(NULL) - (2*TIMEOUT_KEY);
3809 sh_forward_do_free (conn);
3810 SL_RET0(_("check_protocol"));
3811 }
3812
3813
3814 /* -- create server nounce v --
3815 */
3816 ticks = (UINT32) taus_get ();
3817
3818 if (conn->A != NULL)
3819 {
3820 SH_FREE(conn->A);
3821 conn->A = NULL;
3822 }
3823 conn->A = SH_ALLOC(KEY_LEN+1);
3824
3825 sl_strlcpy(conn->A,
3826 sh_tiger_hash((char *) &ticks,
3827 TIGER_DATA, sizeof(UINT32),
3828 hashbuf, sizeof(hashbuf)),
3829 KEY_LEN+1);
3830 u[0] = 'I'; u[1] = 'N'; u[2] = 'I'; u[3] = 'T'; u[4] = '\0';
3831
3832 if (conn->M1 != NULL)
3833 {
3834 SH_FREE(conn->M1);
3835 conn->M1 = NULL;
3836 }
3837 conn->M1 = SH_ALLOC(2*KEY_LEN+1);
3838
3839 /* compute hash key H(v(server), P)v(server)
3840 */
3841 sh_passwd (conn->A, conn->client_entry->verifier,
3842 NULL, conn->M1);
3843
3844 sl_strlcat(conn->M1, conn->A, 2*KEY_LEN+1);
3845
3846
3847 /* --- send H(v(server), P)v(server) ----
3848 */
3849 sh_forward_prep_send (conn,
3850 conn->M1,
3851 sl_strlen(conn->M1),
3852 u,
3853 (conn->head[0]|SH_PROTO_SRP));
3854
3855 SH_FREE(conn->M1);
3856 conn->M1 = NULL;
3857 }
3858
3859 /* client -- third pass
3860 * Message is H(H(u,v),P)u
3861 *
3862 * A := v, verifier := H(password),
3863 */
3864 else if (conn->pass == 3 &&
3865 conn->client_entry != NULL)
3866 {
3867
3868 TPT((0, FIL__, __LINE__,
3869 _("msg=<Authentication - PASS (3).>\n")));
3870
3871 if (0 != check_request_s((char *) &(conn->head[3]), _("PASS"),
3872 conn->peer) ||
3873 sl_strlen(conn->buf) <= KEY_LEN ||
3874 conn->A == NULL)
3875 {
3876 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_BADCONN,
3877 _("Invalid client request"), conn->peer);
3878 status_update (conn->client_entry, CLT_FAILED);
3879 conn->client_entry->session_key_timer =
3880 time(NULL) - (2*TIMEOUT_KEY);
3881 sh_forward_do_free (conn);
3882 SL_RET0(_("check_protocol"));
3883 }
3884
3885 /* store random nonce u from client
3886 */
3887 if (conn->K != NULL)
3888 {
3889 SH_FREE(conn->K);
3890 conn->K = NULL;
3891 }
3892 conn->K = SH_ALLOC(KEY_LEN+1);
3893 sl_strlcpy(conn->K, &(conn->buf[KEY_LEN]), KEY_LEN+1);
3894
3895 /* verify random nonce u from client
3896 */
3897 if (conn->M1 != NULL)
3898 {
3899 SH_FREE(conn->M1);
3900 conn->M1 = NULL;
3901 }
3902 conn->M1 = sh_util_strconcat(conn->K, conn->A, NULL);
3903
3904 TPT((0, FIL__, __LINE__, _("msg=<c/r: K = %s>\n"), conn->K));
3905 TPT((0, FIL__, __LINE__, _("msg=<c/r: A = %s>\n"), conn->A));
3906 TPT((0, FIL__, __LINE__, _("msg=<c/r: M = %s>\n"), conn->M1));
3907
3908 sl_strlcpy(hash, sh_tiger_hash (conn->M1,
3909 TIGER_DATA,
3910 sl_strlen(conn->M1),
3911 hashbuf, sizeof(hashbuf)),
3912 KEY_LEN+1);
3913 sh_passwd (hash, conn->client_entry->verifier, NULL, conn->M1);
3914
3915 TPT((0, FIL__, __LINE__, _("msg=<c/r: H = %s>\n"), hash));
3916 TPT((0, FIL__, __LINE__, _("msg=<c/r: P = %s>\n"), conn->M1));
3917
3918 if ( 0 != sl_strncmp(conn->M1, conn->buf, KEY_LEN))
3919 {
3920 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_BADCONN,
3921 _("Session key mismatch"), conn->peer);
3922 status_update (conn->client_entry, CLT_FAILED);
3923 conn->client_entry->session_key_timer =
3924 time(NULL) - (2*TIMEOUT_KEY);
3925 sh_forward_do_free (conn);
3926 SL_RET0(_("check_protocol"));
3927 }
3928
3929
3930 /* ---- compute hash key H(v, P, u) ----
3931 */
3932
3933 sh_passwd (conn->A, conn->client_entry->verifier, conn->K,
3934 conn->M1);
3935
3936 sl_strlcpy(conn->client_entry->session_key,
3937 conn->M1, KEY_LEN+1);
3938 TPT((0, FIL__, __LINE__, _("msg=<c/r: Key = %s>\n"),
3939 conn->client_entry->session_key));
3940
3941#ifdef SH_ENCRYPT
3942 err_num = makeKey(&(conn->client_entry->keyInstE),
3943 DIR_ENCRYPT, 192,
3944 conn->client_entry->session_key);
3945 if (err_num < 0)
3946 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
3947 errorExplain(err_num, expbuf, sizeof(expbuf)),
3948 _("check_protocol: makeKey"));
3949 err_num = makeKey(&(conn->client_entry->keyInstD),
3950 DIR_DECRYPT, 192,
3951 conn->client_entry->session_key);
3952 if (err_num < 0)
3953 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
3954 errorExplain(err_num, expbuf, sizeof(expbuf)),
3955 _("check_protocol: makeKey"));
3956#endif
3957
3958 if (conn->K != NULL) SH_FREE (conn->K);
3959 conn->K = NULL;
3960 if (conn->A != NULL) SH_FREE (conn->A);
3961 conn->A = NULL;
3962 if (conn->M1 != NULL) SH_FREE (conn->M1);
3963 conn->M1 = NULL;
3964
3965 /* if (conn->client_entry->status_now == CLT_STARTED */
3966 if (((conn->client_entry->status_now != CLT_INACTIVE) &&
3967 (conn->client_entry->status_now != CLT_EXITED) &&
3968 (conn->client_entry->status_now != CLT_SUSPEND))
3969 && conn->client_entry->session_key_timer > (time_t) 1)
3970 {
3971 status_update (conn->client_entry, CLT_ILLEGAL);
3972 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_ILL,
3973 conn->peer);
3974 }
3975 else if (conn->client_entry->session_key_timer == (time_t) 0)
3976 {
3977 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_NEW,
3978 conn->peer);
3979 if (conn->client_entry->status_now != CLT_SUSPEND)
3980 status_update (conn->client_entry, CLT_STARTED);
3981 }
3982
3983 conn->client_entry->session_key_timer = time (NULL);
3984 conn->client_entry->last_connect = time (NULL);
3985
3986 /* put in read state
3987 */
3988 sh_forward_prep_send (conn,
3989 _("AUTH"),
3990 5,
3991 _("AUTH"),
3992 (conn->head[0]|SH_PROTO_SRP));
3993
3994 }
3995 else
3996 {
3997 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_FINV,
3998 3, conn->pass, conn->peer,
3999 '\\', conn->head[3], '\\', conn->head[4],
4000 '\\', conn->head[5], '\\', conn->head[6]);
4001 sh_forward_do_free (conn);
4002 }
4003 }
4004
4005#else
4006 /* use SRP */
4007
4008
4009 if (state == SH_DO_READ) /* finished reading */
4010 {
4011
4012 TPT((0, FIL__, __LINE__, _("msg=<Authentication - entry.>\n")));
4013
4014 /* first pass -- client request salt
4015 */
4016 if (conn->pass == 1)
4017 {
4018 TPT((0, FIL__, __LINE__,
4019 _("msg=<Authentication - SALT (1).>\n")));
4020
4021 if (conn->buf == NULL)
4022 {
4023 sh_error_handle( (-1), FIL__, __LINE__, 0, MSG_TCP_NOCLT);
4024 sh_forward_do_free (conn);
4025 SL_RET0(_("check_protocol"));
4026 }
4027
4028 /* search the register
4029 */
4030 this_client = search_register(conn, 0);
4031 if (NULL == this_client)
4032 SL_RET0(_("check_protocol"));
4033
4034 conn->client_entry = this_client;
4035 sl_strlcpy (conn->peer, conn->buf, SH_MINIBUF+1);
4036
4037 if (0 != check_request_s((char *)&(conn->head[3]), _("SALT"),
4038 conn->peer))
4039 {
4040 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_BADCONN,
4041 _("No salt requested"), conn->peer);
4042 status_update (conn->client_entry, CLT_FAILED);
4043 conn->client_entry->session_key_timer =
4044 time(NULL) - (2*TIMEOUT_KEY);
4045 sh_forward_do_free (conn);
4046 SL_RET0(_("check_protocol"));
4047 }
4048
4049
4050 u[0] = 'I'; u[1] = 'N'; u[2] = 'I'; u[3] = 'T'; u[4] = '\0';
4051
4052 sh_forward_prep_send (conn,
4053 conn->client_entry->salt,
4054 sl_strlen(conn->client_entry->salt),
4055 u,
4056 (conn->head[0]|SH_PROTO_SRP));
4057 }
4058
4059 /* client has sent A -- third pass
4060 */
4061 else if (conn->pass == 3 &&
4062 conn->client_entry != NULL)
4063 {
4064
4065 TPT((0, FIL__, __LINE__,
4066 _("msg=<Authentication - PC01 (3).>\n")));
4067
4068 if (0 != check_request_s((char *)&(conn->head[3]),_("PC01"),conn->peer)||
4069 conn->buf == NULL
4070 )
4071 {
4072 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_BADCONN,
4073 _("Invalid client request"), conn->peer);
4074 status_update (conn->client_entry, CLT_FAILED);
4075 conn->client_entry->session_key_timer =
4076 time(NULL) - (2*TIMEOUT_KEY);
4077 sh_forward_do_free (conn);
4078 SL_RET0(_("check_protocol"));
4079 }
4080
4081 if (0 != sh_srp_init())
4082 {
4083 status_update (conn->client_entry, CLT_FAILED);
4084 sh_error_handle(SH_ERR_SEVERE, FIL__, __LINE__, 0,
4085 MSG_TCP_EBGN);
4086 sh_forward_do_free (conn);
4087 SL_RET0(_("check_protocol"));
4088 }
4089
4090
4091 /* check A, only send B if correct
4092 */
4093 if ( sl_strlen(conn->buf) < SH_BUFSIZE &&
4094 0 == sh_srp_check_zero (conn->buf) )
4095 {
4096 len = sl_strlen(conn->buf)+1;
4097
4098 if (conn->A != NULL)
4099 {
4100 SH_FREE(conn->A);
4101 conn->A = NULL;
4102 }
4103 conn->A = SH_ALLOC(len);
4104 sl_strlcpy (conn->A, conn->buf, len);
4105
4106 /*
4107 * compute B
4108 */
4109 if (0 != sh_srp_make_a ()) /* b random number */
4110 {
4111 status_update (conn->client_entry, CLT_FAILED);
4112
4113 sh_error_handle(SH_ERR_SEVERE, FIL__, __LINE__, 0,
4114 MSG_TCP_EBGN);
4115 sh_srp_exit();
4116 sh_forward_do_free (conn);
4117 SL_RET0(_("check_protocol"));
4118 }
4119
4120 foo_B = sh_srp_B /* B = v + g^b */
4121 (conn->client_entry->verifier);
4122
4123 if (foo_B == NULL)
4124 {
4125 status_update (conn->client_entry, CLT_FAILED);
4126
4127 sh_error_handle(SH_ERR_SEVERE, FIL__, __LINE__, 0,
4128 MSG_TCP_EBGN);
4129 sh_srp_exit();
4130 sh_forward_do_free (conn);
4131 SL_RET0(_("check_protocol"));
4132 }
4133
4134 TPT((0, FIL__, __LINE__, _("msg=<srp: A = %s>\n"), conn->A));
4135 TPT((0, FIL__, __LINE__, _("msg=<srp: B = %s>\n"), foo_B));
4136
4137 /*
4138 * create nonce u
4139 */
4140 ticks = (UINT32) taus_get ();
4141
4142 test = (char *) &ticks;
4143 sh_util_cpylong (u, test, 4); /* u nounce */
4144 u[4] = '\0';
4145 sl_strlcpy(conn->challenge,
4146 sh_tiger_hash(u, TIGER_DATA, 4, hashbuf, sizeof(hashbuf)),
4147 SH_CHALLENGE_SIZE);
4148
4149 TPT((0, FIL__, __LINE__, _("msg=<srp: u = %03o-%03o-%03o-%03o>\n"), u[0], u[1], u[2], u[3]));
4150 TPT((0, FIL__, __LINE__, _("msg=<srp: U = %s>\n"),
4151 conn->challenge));
4152
4153 /*
4154 * compute the session key K and M1 = Hash(A,B,K)
4155 */
4156 foo_Ss = sh_srp_S_s (conn->challenge,
4157 conn->A,
4158 conn->client_entry->verifier);
4159
4160 if (foo_Ss == NULL || 0 != sh_srp_check_zero (foo_Ss))
4161 {
4162 status_update (conn->client_entry, CLT_FAILED);
4163
4164 sh_error_handle(SH_ERR_SEVERE, FIL__, __LINE__, 0,
4165 MSG_TCP_EBGN);
4166 sh_srp_exit();
4167 sh_forward_do_free (conn);
4168 SL_RET0(_("check_protocol"));
4169 }
4170
4171 if (conn->K != NULL)
4172 {
4173 SH_FREE(conn->K);
4174 conn->K = NULL;
4175 }
4176 conn->K = SH_ALLOC(KEY_LEN+1);
4177 sl_strlcpy(conn->K,
4178 sh_tiger_hash(foo_Ss, TIGER_DATA,
4179 sl_strlen(foo_Ss),
4180 hashbuf, sizeof(hashbuf)),
4181 KEY_LEN+1);
4182
4183 if (conn->M1 != NULL)
4184 {
4185 SH_FREE(conn->M1);
4186 conn->M1 = NULL;
4187 }
4188 conn->M1 = SH_ALLOC(KEY_LEN+1);
4189 sh_srp_M (conn->A, foo_B, conn->K, conn->M1, KEY_LEN+1);
4190
4191 TPT((0, FIL__, __LINE__, _("msg=<srp:Ss = %s>\n"), foo_Ss));
4192 TPT((0, FIL__, __LINE__, _("msg=<srp: K = %s>\n"), conn->K));
4193 TPT((0, FIL__, __LINE__, _("msg=<srp:M1 = %s>\n"),conn->M1));
4194
4195 /*
4196 * send B
4197 */
4198 sh_forward_prep_send (conn,
4199 foo_B,
4200 sl_strlen(foo_B)+1,
4201 u,
4202 (conn->head[0]|SH_PROTO_SRP));
4203 if (foo_Ss != NULL)
4204 {
4205 SH_FREE(foo_Ss);
4206 foo_Ss = NULL;
4207 }
4208 if (foo_B != NULL)
4209 {
4210 SH_FREE(foo_B);
4211 foo_B = NULL;
4212 }
4213 }
4214 else
4215 {
4216 status_update (conn->client_entry, CLT_FAILED);
4217
4218 sh_error_handle(SH_ERR_SEVERE, FIL__, __LINE__, 0,
4219 MSG_TCP_EZERO);
4220 sh_forward_do_free (conn);
4221 }
4222
4223 sh_srp_exit();
4224 }
4225
4226 /* client has sent M1 -- fifth pass
4227 */
4228 else if (conn->pass == 5 &&
4229 conn->client_entry != NULL)
4230 {
4231 TPT((0, FIL__, __LINE__,
4232 _("msg=<Authentication - PC02 (5).>\n")));
4233
4234 /* check that the state is valid
4235 */
4236 if (0 != check_request_s((char *)&(conn->head[3]), _("PC02"),
4237 conn->peer) ||
4238 conn->A == NULL || conn->K == NULL || conn->M1 == NULL)
4239 {
4240 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_BADCONN,
4241 _("Invalid client request"), conn->peer);
4242 status_update (conn->client_entry, CLT_FAILED);
4243 conn->client_entry->session_key_timer =
4244 time(NULL) - (2*TIMEOUT_KEY);
4245 sh_forward_do_free (conn);
4246 SL_RET0(_("check_protocol"));
4247 }
4248
4249 /* ------ verify M1 = H(A, B, K) -------
4250 * ----- send M2 = H(A, M1, K) -------
4251 */
4252 if (conn->buf != NULL &&
4253 sl_strncmp(conn->buf, conn->M1, KEY_LEN) == 0)
4254 {
4255 /*
4256 * send M2
4257 */
4258 char M_buf[KEY_LEN+1];
4259 sh_forward_prep_send (conn,
4260 sh_srp_M (conn->A, conn->M1, conn->K,
4261 M_buf, sizeof(M_buf)),
4262 KEY_LEN+1,
4263 _("PARP"),
4264 (conn->head[0]|SH_PROTO_SRP));
4265
4266 if (conn->A != NULL) SH_FREE(conn->A); conn->A = NULL;
4267 if (conn->M1 != NULL) SH_FREE(conn->M1); conn->M1 = NULL;
4268 sl_strlcpy(conn->client_entry->session_key,
4269 conn->K, KEY_LEN+1);
4270 TPT((0, FIL__, __LINE__, _("msg=<key %s>\n"),
4271 conn->client_entry->session_key));
4272
4273#ifdef SH_ENCRYPT
4274 err_num = makeKey(&(conn->client_entry->keyInstE),
4275 DIR_ENCRYPT, 192,
4276 conn->client_entry->session_key);
4277 if (err_num < 0)
4278 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
4279 errorExplain(err_num, expbuf, sizeof(expbuf)),
4280 _("sh_forward_prep_send_int: makeKey"));
4281 err_num = makeKey(&(conn->client_entry->keyInstD),
4282 DIR_DECRYPT, 192,
4283 conn->client_entry->session_key);
4284 if (err_num < 0)
4285 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
4286 errorExplain(err_num, expbuf, sizeof(expbuf)),
4287 _("sh_forward_prep_send_int: makeKey"));
4288#endif
4289
4290 if (conn->K != NULL) SH_FREE(conn->K); conn->K = NULL;
4291
4292 conn->client_entry->last_connect = time (NULL);
4293
4294 if (((conn->client_entry->status_now != CLT_INACTIVE) &&
4295 (conn->client_entry->status_now != CLT_EXITED) &&
4296 (conn->client_entry->status_now != CLT_SUSPEND))
4297 && conn->client_entry->session_key_timer > (time_t) 1)
4298 {
4299 status_update (conn->client_entry, CLT_ILLEGAL);
4300
4301 sh_error_handle((-1), FIL__, __LINE__, 0,
4302 MSG_TCP_ILL,
4303 conn->peer);
4304 }
4305 else if (conn->client_entry->session_key_timer == (time_t) 0)
4306 {
4307 sh_error_handle((-1), FIL__, __LINE__, 0,
4308 MSG_TCP_NEW,
4309 conn->peer);
4310 if (conn->client_entry->status_now != CLT_SUSPEND)
4311 status_update (conn->client_entry, CLT_STARTED);
4312 }
4313 conn->client_entry->session_key_timer = time (NULL);
4314
4315 }
4316 else
4317 {
4318 status_update (conn->client_entry, CLT_FAILED);
4319 conn->client_entry->session_key_timer =
4320 time(NULL) - (2*TIMEOUT_KEY);
4321
4322 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_BADCONN,
4323 _("Session key mismatch"), conn->peer);
4324 sh_forward_do_free (conn);
4325 }
4326 }
4327
4328 else
4329 {
4330 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_FINV,
4331 4, conn->pass, conn->peer,
4332 '\\', conn->head[3], '\\', conn->head[4],
4333 '\\', conn->head[5], '\\', conn->head[6]);
4334 sh_forward_do_free (conn);
4335 }
4336 }
4337
4338#endif
4339
4340 else if (state == SH_DO_WRITE) /* finished writing */
4341 {
4342 TPT((0, FIL__, __LINE__, _("msg=<Authentication -- (wait).>\n")));
4343
4344 conn->headcount = 0;
4345 conn->bytecount = 0;
4346 conn->bytes_to_send = 0;
4347 conn->bytes_to_get = 0;
4348 if (conn->buf != NULL)
4349 {
4350 SH_FREE(conn->buf);
4351 conn->buf = NULL;
4352 }
4353 conn->state = CONN_READING;
4354 }
4355 }
4356 SL_RET0(_("check_protocol"));
4357}
4358
4359
4360/***********************************************************
4361 *
4362 * SERVER RECEIVE FUNCTION
4363 *
4364 ***********************************************************
4365 */
4366int sh_forward_do_read (sh_conn_t * conn)
4367{
4368 unsigned long byteread; /* bytes read */
4369
4370#ifdef SH_ENCRYPT
4371
4372 unsigned long blkfac = 0;
4373 /* unsigned long length2; */
4374 char * p = NULL, * q = NULL;
4375 RIJ_BYTE inBlock[B_SIZ];
4376 RIJ_BYTE outBlock[B_SIZ];
4377 unsigned int j;
4378 cipherInstance cipherInst;
4379 int err_num;
4380 char expbuf[SH_ERRBUF_SIZE];
4381#endif
4382
4383 SL_ENTER(_("sh_forward_do_read"));
4384
4385 if (conn->state == CONN_SENDING)
4386 {
4387 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_SYNC,
4388 conn->peer);
4389 SL_RETURN( (-1), _("sh_forward_do_read"));
4390 }
4391
4392 if (conn->headcount < SH_HEADER_SIZE)
4393 {
4394 conn->bytes_to_get = SH_HEADER_SIZE - conn->headcount;
4395 byteread = read (conn->fd, &(conn->head[conn->headcount]),
4396 conn->bytes_to_get);
4397 if (byteread > 0 || errno == EINTR)
4398 {
4399 if (byteread > 0)
4400 conn->headcount += byteread;
4401 if (conn->headcount == SH_HEADER_SIZE)
4402 {
4403 conn->bytes_to_get =
4404 (256 * (unsigned int)conn->head[1] +
4405 (unsigned int)conn->head[2]);
4406 SH_SHOWPROT(conn->head, '<');
4407 conn->bytecount = 0;
4408 }
4409 }
4410 else
4411 {
4412 goto conn_reset;
4413 }
4414 SL_RETURN( (0), _("sh_forward_do_read"));
4415 }
4416
4417
4418 /* limit message size
4419 */
4420 /*
4421 conn->bytes_to_get =
4422 (conn->bytes_to_get > (16*SH_BUFSIZE - 1)) ?
4423 (16*SH_BUFSIZE - 1) : conn->bytes_to_get;
4424 */
4425 conn->bytes_to_get = (conn->bytes_to_get > TRANS_BYTES) ?
4426 TRANS_BYTES : conn->bytes_to_get;
4427
4428 if (conn->headcount == SH_HEADER_SIZE && conn->bytes_to_get > 0)
4429 {
4430 if ((conn->bytecount > 0) && (conn->bytes_to_get > conn->bytecount))
4431 {
4432 /* do nothing */;
4433 }
4434 else
4435 {
4436 if (conn->buf != NULL)
4437 SH_FREE (conn->buf);
4438 conn->buf = SH_ALLOC(conn->bytes_to_get + 1); /* <= TRANS_BYTES+1 */
4439 conn->bytecount = 0;
4440 }
4441
4442 byteread = read (conn->fd, &(conn->buf[conn->bytecount]),
4443 conn->bytes_to_get - conn->bytecount);
4444 if (byteread > 0 || errno == EINTR)
4445 {
4446 if (byteread > 0)
4447 conn->bytecount += byteread;
4448 if (conn->bytecount == conn->bytes_to_get)
4449 {
4450 ++conn->pass;
4451 /* always terminate with NULL - we might use sl_strcmp()
4452 */
4453 conn->buf[conn->bytecount] = '\0';
4454 conn->state = CONN_PAUSE;
4455
4456#ifdef SH_ENCRYPT
4457 if ((conn->head[0] & SH_PROTO_EN2) != 0) /* if encrypted */
4458 {
4459 conn->buf =
4460 sh_tools_revertPack (conn->head, conn->buf,
4461 &(conn->client_entry->keyInstD),
4462 conn->bytecount);
4463 }
4464 else if ((conn->head[0] & SH_PROTO_ENC) != 0) /* if encrypted */
4465 {
4466 /* Decrypt only complete blocks.
4467 * If there is an incomplete block,
4468 * something is wrong anyway.
4469 * Decrypt in place.
4470 */
4471 blkfac = conn->bytecount / B_SIZ;
4472 /* length2 = (B_SIZ * blkfac); */
4473 p = conn->buf;
4474 q = conn->buf;
4475
4476 err_num = cipherInit (&cipherInst, MODE_CBC, NULL);
4477 if (err_num < 0)
4478 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
4479 errorExplain(err_num, expbuf, sizeof(expbuf)),
4480 _("sh_forward_do_read: cipherInit"));
4481
4482 for (j = 0; j < blkfac; ++j)
4483 {
4484 memcpy(inBlock, p, B_SIZ);
4485 err_num = blockDecrypt(&cipherInst,
4486 &(conn->client_entry->keyInstD),
4487 inBlock, 128 * BNUM, outBlock);
4488 if (err_num < 0)
4489 sh_error_handle((-1), FIL__, __LINE__, -1,
4490 MSG_E_SUBGEN,
4491 errorExplain(err_num, expbuf, sizeof(expbuf)),
4492 _("sh_forward_do_read: blockDecrypt"));
4493 memcpy(q, outBlock, B_SIZ);
4494 p += 16;
4495 q += 16;
4496 }
4497 }
4498#endif
4499
4500 /* ------ HERE CALL check_protocol(conn) ------- */
4501 check_protocol(conn, SH_DO_READ);
4502 }
4503 }
4504 else
4505 {
4506 goto conn_reset;
4507 }
4508 }
4509
4510 else if (conn->headcount == SH_HEADER_SIZE && conn->bytes_to_get == 0)
4511 {
4512 if (conn->buf != NULL)
4513 SH_FREE (conn->buf);
4514 conn->buf = NULL;
4515 conn->bytecount = 0;
4516 ++conn->pass;
4517 conn->state = CONN_PAUSE;
4518 /* fprintf(stderr, "\n**** FIXME null read ****\n\n"); */
4519 /* ------ HERE CALL check_protocol(conn) ------- */
4520 check_protocol(conn, SH_DO_READ);
4521 }
4522
4523 SL_RETURN( (0), _("sh_forward_do_read"));
4524
4525 conn_reset:
4526 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_RESET,
4527 conn->peer);
4528 sh_forward_do_free ( conn );
4529 SL_RETURN( (-1), _("sh_forward_do_read"));
4530}
4531
4532#if !defined(O_NONBLOCK)
4533#if defined(O_NDELAY)
4534#define O_NONBLOCK O_NDELAY
4535#else
4536#define O_NONBLOCK 0
4537#endif
4538#endif
4539
4540/* send to the client
4541 */
4542int sh_forward_do_write (sh_conn_t * conn)
4543{
4544 int flags;
4545 long arg = 0;
4546 long bytesent; /* bytes read */
4547
4548 SL_ENTER(_("sh_forward_do_write"));
4549
4550 /* ---- consistency check ------
4551 */
4552 if (conn->state == CONN_READING)
4553 {
4554 sh_error_handle( (-1), FIL__, __LINE__, 0, MSG_TCP_SYNC,
4555 conn->peer);
4556 SL_RETURN( (-1), _("sh_forward_do_write"));
4557 }
4558
4559
4560 flags = retry_fcntl (FIL__, __LINE__, conn->fd, F_GETFL, arg);
4561 retry_fcntl (FIL__, __LINE__, conn->fd, F_SETFL, flags|O_NONBLOCK);
4562
4563 /* ---- send the header ------
4564 */
4565 if (conn->headcount < SH_HEADER_SIZE)
4566 {
4567 conn->bytes_to_send = SH_HEADER_SIZE - conn->headcount;
4568 bytesent = write (conn->fd,
4569 &(conn->head[conn->headcount]),
4570 conn->bytes_to_send);
4571 if (bytesent >= 0 || errno == EINTR || errno == EAGAIN)
4572 {
4573 if (bytesent > 0)
4574 conn->headcount += bytesent;
4575 if (conn->headcount == SH_HEADER_SIZE)
4576 {
4577 conn->bytes_to_send =
4578 (256 * (int)conn->head[1] + (int)conn->head[2]);
4579 }
4580 }
4581 else
4582 {
4583 goto conn_reset_w;
4584 }
4585 if (conn->fd >= 0)
4586 retry_fcntl (FIL__, __LINE__, conn->fd, F_SETFL, flags);
4587 SL_RETURN( (0), _("sh_forward_do_write"));
4588 }
4589
4590
4591 /* ---- send the body ------
4592 */
4593
4594 if (conn->headcount == SH_HEADER_SIZE && conn->bytes_to_send > 0 &&
4595 conn->buf != NULL)
4596 {
4597 bytesent = write (conn->fd, &(conn->buf[conn->bytecount]),
4598 conn->bytes_to_send - conn->bytecount);
4599 if (bytesent >= 0 || errno == EINTR || errno == EAGAIN)
4600 {
4601 if (bytesent > 0)
4602 conn->bytecount += bytesent;
4603 if (conn->bytecount == conn->bytes_to_send)
4604 {
4605 ++conn->pass;
4606 conn->state = CONN_PAUSE;
4607 /* ------ HERE CALL check_protocol(conn) ------- */
4608 check_protocol(conn, SH_DO_WRITE);
4609 }
4610 }
4611 else
4612 {
4613 goto conn_reset_w;
4614 }
4615 }
4616
4617 else if (conn->headcount == SH_HEADER_SIZE && conn->bytes_to_send == 0)
4618 {
4619 ++conn->pass;
4620 conn->state = CONN_PAUSE;
4621 /* fprintf(stderr, "\n**** FIXME null write ****\n\n"); */
4622 /* ------ HERE CALL check_protocol(conn) ------- */
4623 check_protocol(conn, SH_DO_WRITE);
4624 }
4625
4626 if (conn->fd >= 0)
4627 retry_fcntl (FIL__, __LINE__, conn->fd, F_SETFL, flags);
4628 SL_RETURN( (0), _("sh_forward_do_write"));
4629
4630 conn_reset_w:
4631 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_RESET,
4632 conn->peer);
4633 sh_forward_do_free ( conn );
4634 SL_RETURN( (-1), _("sh_forward_do_write"));
4635}
4636
4637/* accept a connection from a client
4638 */
4639#include <syslog.h>
4640#ifdef SH_USE_LIBWRAP
4641#include <tcpd.h>
4642
4643#ifndef ALLOW_SEVERITY
4644#define ALLOW_SEVERITY LOG_INFO
4645#define DENY_SEVERITY LOG_WARNING
4646#endif
4647
4648int allow_severity;
4649int deny_severity;
4650#endif
4651
4652int sh_forward_accept (int sock, sh_conn_t * newconn)
4653{
4654 int errflag;
4655 int rc;
4656 struct sockaddr_in addr;
4657#ifdef SH_USE_LIBWRAP
4658 struct request_info request;
4659 char errbuf[128];
4660 char daemon[128];
4661#endif
4662
4663 /* handle AIX (size_t addrlen) in wrapper
4664 */
4665 int addrlen = sizeof(addr);
4666
4667 SL_ENTER(_("sh_forward_accept"));
4668
4669 rc = retry_accept(FIL__, __LINE__, sock,
4670 (struct sockaddr *) &addr, &addrlen);
4671
4672 if (rc >= 0)
4673 {
4674
4675 if (addrlen == 0)
4676 {
4677 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_E_SUBGEN,
4678 _("Connecting entity unknown"), _("accept"));
4679 newconn->fd = -1;
4680 newconn->state = CONN_FREE;
4681 close(rc);
4682 SL_RETURN( (-1), _("sh_forward_accept"));
4683 }
4684
4685#ifdef SH_USE_LIBWRAP
4686 sl_strlcpy(daemon, SH_INSTALL_NAME, 128);
4687 request_init(&request, RQ_DAEMON, daemon, RQ_FILE, rc, 0);
4688 fromhost(&request);
4689 if (!hosts_access(&request))
4690 {
4691 sl_strlcpy(errbuf, _("Refused connection from "), 128);
4692 sl_strlcat(errbuf, eval_client(&request), 128);
4693
4694 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_E_SUBGEN,
4695 errbuf, _("libwrap"));
4696 newconn->fd = -1;
4697 newconn->state = CONN_FREE;
4698 close(rc);
4699 SL_RETURN( (-1), _("sh_forward_accept"));
4700 }
4701#endif
4702
4703 memcpy (&(newconn->addr_peer), &addr, sizeof(struct sockaddr_in));
4704
4705 /* prepare for usage of connection
4706 */
4707 (void) retry_fcntl( FIL__, __LINE__, rc, F_SETFD, 1 );
4708 newconn->fd = rc;
4709 newconn->state = CONN_READING;
4710 newconn->timer = (unsigned long) time (NULL);
4711
4712 if (flag_err_info == SL_TRUE)
4713 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_CNEW, newconn->fd);
4714
4715 SL_RETURN( (0), _("sh_forward_accept"));
4716 }
4717 else
4718 {
4719 char err_buf[SH_ERRBUF_SIZE];
4720 errflag = errno;
4721 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_E_SUBGEN,
4722 sh_error_message(errflag,err_buf, sizeof(err_buf)), _("accept"));
4723 newconn->fd = -1;
4724 newconn->state = CONN_FREE;
4725 SL_RETURN( (-1), _("sh_forward_accept"));
4726 }
4727}
4728
4729extern char sh_sig_msg[64]; /* defined in sh_unix.c */
4730
4731/* ------------ port and interface -------
4732 */
4733static unsigned int server_port = SH_DEFAULT_PORT;
4734
4735int sh_forward_set_port (const char * str)
4736{
4737 int retval = 0;
4738 unsigned long i;
4739 char * endptr;
4740
4741 SL_ENTER(_("sh_forward_set_port"));
4742 i = strtoul (str, &endptr, 0);
4743 if (endptr == str) {
4744 retval = -1;
4745 } else if (i > 65535) {
4746 retval = -1;
4747 } else {
4748 server_port = i;
4749 }
4750 SL_RETURN( (retval), _("sh_forward_set_port"));
4751}
4752
4753static struct in_addr server_interface;
4754static int use_server_interface = 0;
4755
4756int sh_forward_set_interface (const char * str)
4757{
4758 if (0 == strcmp(str, _("INADDR_ANY")))
4759 {
4760 use_server_interface = 0;
4761 return 0;
4762 }
4763 if (0 == /*@-unrecog@*/inet_aton(str, &server_interface)/*@+unrecog@*/)
4764 {
4765 use_server_interface = 0;
4766 return -1;
4767 }
4768 use_server_interface = 1;
4769 return 0;
4770}
4771
4772/* ------------ print error --------------
4773 */
4774struct sock_err_st {
4775 char msg[128];
4776 int errnum;
4777 int port;
4778 int line;
4779 int euid;
4780};
4781
4782static struct sock_err_st sock_err[2];
4783
4784void sh_forward_printerr(char * str, int errnum, unsigned int port, int line)
4785{
4786 int slot = 0;
4787
4788 if (port != server_port)
4789 slot = 1;
4790 if (str == NULL)
4791 sock_err[slot].msg[0] = '\0';
4792 else
4793 sl_strlcpy(sock_err[slot].msg, str, 128);
4794 sock_err[slot].errnum = errnum;
4795 sock_err[slot].port = port;
4796 sock_err[slot].line = line;
4797 sock_err[slot].euid = (int) geteuid();
4798}
4799
4800int sh_forward_printerr_final(int slot)
4801{
4802 char errbuf[SH_ERRBUF_SIZE];
4803
4804 SL_ENTER(_("sh_forward_printerr_final"));
4805 if (sock_err[slot].msg[0] != '\0')
4806 {
4807 dlog(1, FIL__, __LINE__,
4808 _("Could not set up the listening socket for the server because of the\nfollowing error: %s\nPossible reasons include:\n - insufficient privilege for UID %d, or\n - the port %d is already used by another program.\n"),
4809 sh_error_message(sock_err[slot].errnum, errbuf, sizeof(errbuf)),
4810 sock_err[slot].euid,
4811 sock_err[slot].port);
4812 sh_error_handle((-1), FIL__, sock_err[slot].line,
4813 sock_err[slot].errnum, MSG_EXIT_ABORTS,
4814 sh_error_message(sock_err[slot].errnum, errbuf, sizeof(errbuf)),
4815 sh.prg_name,
4816 sock_err[slot].msg);
4817 SL_RETURN((-1), _("sh_forward_printerr_final"));
4818 }
4819 SL_RETURN(0, _("sh_forward_printerr_final"));
4820}
4821
4822#define TIME_OUT_DEF 900
4823static unsigned long time_out_val = TIME_OUT_DEF;
4824
4825int sh_forward_set_timeout (const char * c)
4826{
4827 long val;
4828
4829 SL_ENTER(_("sh_forward_set_time_out"));
4830
4831 val = strtol (c, (char **)NULL, 10);
4832
4833 if (val == 0)
4834 {
4835 val = TIME_OUT_DEF;
4836 }
4837 else if (val < 0)
4838 {
4839 time_out_val = TIME_OUT_DEF;
4840 SL_RETURN( (-1), _("sh_forward_set_time_out"));
4841 }
4842
4843 time_out_val = (unsigned long) val;
4844 SL_RETURN( (0), _("sh_forward_set_time_out"));
4845}
4846
4847
4848static sh_conn_t * conns = NULL;
4849static int maxconn = 0; /* maximum number of simultaneous connections */
4850
4851
4852#ifdef INET_SYSLOG
4853#define INET_SUSPEND_TIME 180 /* equal to 3 minutes */
4854#define SH_MINSOCK 3
4855int create_syslog_socket (int flag);
4856static int recv_syslog_socket (int fd);
4857static int syslog_sock = -1;
4858#else
4859#define SH_MINSOCK 2
4860#endif
4861
4862extern int pf_unix_fd;
4863
4864/* the tcp socket, and the function to establish it
4865 */
4866static int sh_tcp_sock = -1;
4867
4868int sh_create_tcp_socket (void)
4869{
4870 struct sockaddr_in addr;
4871 int addrlen = sizeof(addr);
4872
4873 int sock = -1;
4874 int errnum = 0;
4875 int flag = 1; /* non-zero to enable an option */
4876
4877 SL_ENTER(_("sh_create_tcp_socket"));
4878
4879 sh_forward_printerr (NULL, 0, server_port, __LINE__);
4880
4881 /* create the socket, bind() it and listen()
4882 */
4883 if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0 )
4884 {
4885 errnum = errno;
4886 sh_forward_printerr (_("socket"), errnum, server_port, __LINE__);
4887 SL_RETURN((-1), _("sl_create_tcp_socket"));
4888 }
4889 (void) retry_fcntl( FIL__, __LINE__, sock, F_SETFD, 1 );
4890
4891 if ( setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
4892 (void *) &flag, sizeof(flag)) < 0 )
4893 {
4894 errnum = errno;
4895 sh_forward_printerr (_("setsockopt"), errnum, server_port, __LINE__);
4896 SL_RETURN((-1), _("sl_create_tcp_socket"));
4897 }
4898
4899 addr.sin_family = AF_INET;
4900 addr.sin_port = htons(server_port);
4901 if (use_server_interface == 0)
4902 addr.sin_addr.s_addr = INADDR_ANY;
4903 else
4904 memcpy(&addr.sin_addr, &server_interface, sizeof(struct in_addr));
4905
4906 if ( bind(sock, (struct sockaddr *) &addr, addrlen) < 0)
4907 {
4908 errnum = errno;
4909 sh_forward_printerr (_("bind"), errnum, server_port, __LINE__);
4910 SL_RETURN((-1), _("sl_create_tcp_socket"));
4911 }
4912
4913 if ( retry_fcntl( FIL__, __LINE__, sock, F_SETFL, O_NONBLOCK ) < 0 )
4914 {
4915 errnum = errno;
4916 sh_forward_printerr (_("fcntl"), errnum, server_port, __LINE__);
4917 SL_RETURN((-1), _("sl_create_tcp_socket"));
4918 }
4919
4920 if ( listen(sock, 5) < 0)
4921 {
4922 errnum = errno;
4923 sh_forward_printerr (_("listen"), errnum, server_port, __LINE__);
4924 SL_RETURN((-1), _("sl_create_tcp_socket"));
4925 }
4926
4927 sh_tcp_sock = sock;
4928
4929 SL_RETURN((sock), _("sl_create_tcp_socket"));
4930}
4931
4932/*****************************************
4933 *
4934 * This is the server main loop.
4935 *
4936 * The server is set up for listening, and
4937 * and starts a select() loop.
4938 *
4939 *****************************************/
4940
4941void sh_receive()
4942{
4943#ifdef SH_USE_XML
4944 extern int sh_log_file (char * message, char * inet_peer);
4945#endif
4946
4947 int sock = -1;
4948 sh_conn_t * cx;
4949 fd_set readset;
4950 fd_set writeset;
4951 struct timeval tv;
4952 int num_sel;
4953 int errnum;
4954 int nowconn;
4955 int status;
4956 int high_fd;
4957 register int i;
4958 long dummy = 0;
4959 unsigned long time_now;
4960 unsigned long time_last = 0;
4961 unsigned long time_out = time_out_val;
4962
4963 time_t told;
4964 time_t tcurrent;
4965
4966 unsigned long tchkold;
4967
4968 struct sigaction new_act;
4969 struct sigaction old_act;
4970
4971 int setsize_fd;
4972
4973 SL_ENTER(_("sh_receive"));
4974
4975 /* ignore SIGPIPE (instead get EPIPE if connection is closed)
4976 * --- we have called sh_unix_init() already ---
4977 */
4978 new_act.sa_handler = SIG_IGN;
4979 sigemptyset( &new_act.sa_mask ); /* set an empty mask */
4980 new_act.sa_flags = 0; /* init sa_flags */
4981 retry_sigaction (FIL__, __LINE__, SIGPIPE, &new_act, &old_act);
4982
4983 if ( sh_forward_printerr_final(0) < 0)
4984 {
4985 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
4986 }
4987 sock = sh_tcp_sock;
4988
4989 /* ****************************************************************
4990 *
4991 * This is a non-forking server. We use select() on the listen()
4992 * socket to watch for new connections. For new connections, accept()
4993 * will return a new socket that is put in the read/write filesets.
4994 * Data about active connections are kept in the 'conns' table.
4995 *
4996 ******************************************************************/
4997
4998 /* The table to hold info on sockets.
4999 * We reserve 6 file descriptors for misc. use.
5000 * The POSIX lower limit on open files seems to be eight.
5001 */
5002 maxconn = get_open_max() - 6;
5003 /* ugly fix for FreeBSD compiler warning; casting FD_SETSIZE in the
5004 * conditional expression does not suppress the warning... */
5005 setsize_fd = (int)FD_SETSIZE;
5006 maxconn = (setsize_fd < maxconn) ? setsize_fd : maxconn;
5007
5008 if (maxconn < 0 || !sl_ok_muls(maxconn, sizeof(sh_conn_t)))
5009 {
5010 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_START_SRV,
5011 0, sock);
5012 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
5013 }
5014 conns = SH_ALLOC (sizeof(sh_conn_t) * maxconn);
5015
5016 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_START_SRV,
5017 (maxconn-1), sock);
5018
5019 /* timer
5020 */
5021 tcurrent = (unsigned long) time (NULL);
5022 told = tcurrent;
5023
5024 tchkold = tcurrent;
5025
5026 for (i = SH_MINSOCK; i < maxconn; ++i)
5027 {
5028 conns[i].buf = NULL;
5029 conns[i].K = NULL;
5030 conns[i].A = NULL;
5031 conns[i].M1 = NULL;
5032 conns[i].FileName = NULL;
5033 conns[i].fd = -1;
5034 sh_forward_do_free ( &conns[i]);
5035 }
5036
5037 /* status init
5038 */
5039 server_status.conn_open = 0;
5040 server_status.conn_total = 0;
5041 server_status.conn_max = maxconn-1;
5042 server_status.start = time (NULL);
5043 server_status.last = (time_t) 0;
5044
5045 nowconn = 1;
5046 tv.tv_sec = 5;
5047 tv.tv_usec = 0;
5048
5049 /* conns[0] is the listen() socket. Always in read mode.
5050 */
5051 conns[0].fd = sock;
5052 conns[0].state = CONN_READING;
5053 high_fd = sock;
5054
5055 conns[1].fd = pf_unix_fd;
5056 conns[1].state = CONN_READING;
5057 high_fd = (pf_unix_fd > high_fd) ? pf_unix_fd : high_fd;
5058
5059#ifdef INET_SYSLOG
5060 conns[2].fd = -1;
5061 if ( sh_forward_printerr_final(1) < 0)
5062 {
5063 SH_FREE(conns);
5064 conns = NULL;
5065 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
5066 }
5067 sock = syslog_sock;
5068
5069 if (sock >= 0)
5070 {
5071 conns[2].fd = sock;
5072 conns[2].state = CONN_READING;
5073 high_fd = (high_fd > conns[2].fd) ? high_fd : conns[2].fd;
5074 }
5075#endif
5076
5077 sh_html_write(all_clients);
5078
5079 /* This is the select() loop.
5080 */
5081 while (1 == 1)
5082 {
5083
5084 if (sig_raised > 0)
5085 {
5086 TPT((0, FIL__, __LINE__, _("msg=<Process a signal.>\n")))
5087
5088 if (sig_termfast == 1) /* SIGTERM */
5089 {
5090 TPT((0, FIL__, __LINE__, _("msg=<Terminate.>\n")));
5091 strncpy (sh_sig_msg, _("SIGTERM"), 20);
5092 --sig_raised; --sig_urgent;
5093 aud_exit (FIL__, __LINE__, EXIT_SUCCESS);
5094 }
5095
5096 if (sig_config_read_again == 1)
5097 {
5098 TPT((0, FIL__, __LINE__, _("msg=<Re-read configuration.>\n")));
5099 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_RECONF);
5100
5101
5102 /* -- Delete the name server cache. --
5103 */
5104
5105 delete_cache();
5106#if defined(WITH_EXTERNAL)
5107 /* -- Delete list of external tasks. --
5108 */
5109 (void) sh_ext_cleanup();
5110#endif
5111#if defined(SH_WITH_MAIL)
5112 sh_nmail_free();
5113#endif
5114 /* - mark all clients dead
5115 * - read configuration file
5116 * - remove clients still dead
5117 */
5118 sh_forward_mark_dead ();
5119
5120 reset_count_dev_console();
5121 reset_count_dev_time();
5122 sl_trust_purge_user();
5123
5124 (void) sh_readconf_read ();
5125 for (i = SH_MINSOCK; i < maxconn; ++i)
5126 if (conns[i].state != CONN_FREE &&
5127 conns[i].client_entry != NULL &&
5128 conns[i].client_entry->dead_flag == 1)
5129 sh_forward_do_free ( &conns[i]);
5130 sh_forward_clean_tree ();
5131
5132 sig_config_read_again = 0;
5133 --sig_raised;
5134 }
5135
5136 if (sig_fresh_trail == 1) /* SIGIOT */
5137 {
5138 /* Logfile access
5139 */
5140#ifdef SH_USE_XML
5141 sh_log_file (NULL, NULL);
5142#endif
5143 TPT((0, FIL__, __LINE__, _("msg=<Logfile stop/restart.>\n")));
5144 sh_error_only_stderr (S_TRUE);
5145 sh_unix_rm_lock_file(sh.srvlog.name);
5146 retry_msleep(3, 0);
5147 sh.flag.log_start = S_TRUE;
5148 sh_error_only_stderr (S_FALSE);
5149 sig_fresh_trail = 0;
5150 --sig_raised;
5151 }
5152
5153
5154 if (sig_terminate == 1 && nowconn < 2) /* SIGQUIT */
5155 {
5156 TPT((0, FIL__, __LINE__, _("msg=<Terminate.>\n")));
5157 strncpy (sh_sig_msg, _("SIGQUIT"), 20);
5158 --sig_raised; --sig_urgent;
5159 aud_exit (FIL__, __LINE__, EXIT_SUCCESS);
5160 }
5161
5162
5163 if (sig_debug_switch == 1) /* SIGUSR1 */
5164 {
5165 TPT((0, FIL__, __LINE__, _("msg=<Debug switch.>\n")));
5166 sh_error_dbg_switch();
5167 sig_debug_switch = 0;
5168 --sig_raised;
5169 }
5170
5171 if (sig_suspend_switch > 0) /* SIGUSR2 */
5172 {
5173 TPT((0, FIL__, __LINE__, _("msg=<Suspend switch.>\n")));
5174 if (sh_global_suspend_flag == 1) {
5175 sh_global_suspend_flag = 0;
5176 } else {
5177 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_SUSPEND,
5178 sh.prg_name);
5179 sh_global_suspend_flag = 1;
5180 }
5181 --sig_suspend_switch;
5182 --sig_raised; --sig_urgent;
5183 }
5184
5185 sig_raised = (sig_raised < 0) ? 0 : sig_raised;
5186 sig_urgent = (sig_urgent < 0) ? 0 : sig_urgent;
5187 TPT((0, FIL__, __LINE__, _("msg=<End signal processing.>\n")));
5188 }
5189
5190 if (sh_global_suspend_flag == 1)
5191 {
5192 (void) retry_msleep (1, 0);
5193 continue;
5194 }
5195
5196 /* Recompute the descriptor set. select() modifies it,
5197 * thus we update it using the info from the connection table.
5198 * Also recompute the number of open connections.
5199 */
5200 FD_ZERO( &readset );
5201 FD_ZERO( &writeset );
5202 FD_SET(conns[0].fd, &readset );
5203 high_fd = conns[0].fd;
5204
5205 if (conns[1].fd > -1)
5206 {
5207 FD_SET(conns[1].fd, &readset );
5208 high_fd = (high_fd > conns[1].fd) ? high_fd : conns[1].fd;
5209 }
5210
5211#ifdef INET_SYSLOG
5212 if (conns[2].fd > -1)
5213 {
5214 FD_SET(conns[2].fd, &readset );
5215 high_fd = (high_fd > conns[2].fd) ? high_fd : conns[2].fd;
5216 }
5217#endif
5218
5219 time_now = (unsigned long) time (NULL);
5220 nowconn = 1;
5221
5222 for (i = SH_MINSOCK; i < maxconn; ++i)
5223 {
5224 /* eliminate timed out connections
5225 */
5226 if (conns[i].state != CONN_FREE)
5227 {
5228 if (time_now-conns[i].timer > time_out)
5229 {
5230 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_TIMOUT,
5231 conns[i].peer);
5232 sh_forward_do_free ( &conns[i]);
5233 }
5234 else
5235 ++nowconn;
5236 }
5237
5238
5239 if (conns[i].state == CONN_READING)
5240 {
5241 FD_SET(conns[i].fd, &readset);
5242 high_fd = (high_fd < conns[i].fd ? conns[i].fd : high_fd);
5243 }
5244 else if (conns[i].state == CONN_SENDING)
5245 {
5246 FD_SET(conns[i].fd, &writeset);
5247 high_fd = (high_fd < conns[i].fd ? conns[i].fd : high_fd);
5248 }
5249 }
5250
5251 /* -- Exponentially reduce timeout limit if more than 1/2 full. --
5252 */
5253 /* Eliminate this, will cause problems when too much clients are
5254 * starting up. */
5255#if 0
5256 if (nowconn > (maxconn/2))
5257 time_out = ( (time_out/2) > 1) ? (time_out/2) : 1;
5258 else
5259 time_out = time_out_val;
5260#endif
5261
5262
5263 /* -- Do the select(). --
5264 */
5265 num_sel = select(high_fd+1, &readset, &writeset, NULL, &tv);
5266 errnum = errno;
5267
5268 /* reset timeout - modified by select() on some systems
5269 */
5270 tv.tv_sec = 5;
5271 tv.tv_usec = 0;
5272
5273
5274 if ( (time_now - time_last) > 2L)
5275 {
5276 time_last = time_now;
5277 if (sh_html_write(all_clients) < 0)
5278 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_E_HTML);
5279 }
5280
5281
5282 /* Error handling.
5283 */
5284 if ( num_sel < 0 ) /* some error */
5285 {
5286 char errbuf[SH_ERRBUF_SIZE];
5287
5288 if (sig_raised == 1)
5289 {
5290 sig_raised = 2;
5291 continue;
5292 }
5293
5294 if ( errnum == EINTR)
5295 continue; /* try again */
5296
5297 if ( errnum == EBADF)
5298 {
5299 /* seek and destroy the bad fd
5300 */
5301 for (i = SH_MINSOCK; i < high_fd; ++i)
5302 {
5303 if ((conns[i].state == CONN_READING) ||
5304 (conns[i].state == CONN_SENDING))
5305 {
5306 if (-1 == retry_fcntl(FIL__, __LINE__,
5307 conns[i].fd, F_GETFL, dummy))
5308 sh_forward_do_free ( &conns[i]);
5309 }
5310 }
5311 continue;
5312 }
5313
5314 sh_error_handle((-1), FIL__, __LINE__, errnum, MSG_EXIT_ABORTS,
5315 sh_error_message(errnum, errbuf, sizeof(errbuf)),
5316 sh.prg_name,
5317 _("select"));
5318 aud_exit(FIL__, __LINE__, EXIT_FAILURE );
5319 }
5320
5321
5322 /* log the timestamp
5323 */
5324 if ((tcurrent - told) > sh.looptime )
5325 {
5326 told = tcurrent;
5327#ifdef MEM_DEBUG
5328 sh_mem_check();
5329 sh_unix_count_mlock();
5330#else
5331 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_STAMP);
5332#endif
5333 }
5334
5335#if defined(SH_WITH_MAIL)
5336 /*
5337 * flush the mail queue
5338 */
5339 if (tcurrent - sh.mailTime.alarm_last > sh.mailTime.alarm_interval)
5340 {
5341 TPT((0, FIL__, __LINE__, _("msg=<Flush mail queue.>\n")))
5342 (void) sh_nmail_flush ();
5343 sh.mailTime.alarm_last = tcurrent;
5344 }
5345#endif
5346#ifdef MEM_DEBUG
5347 sh_mem_dump();
5348#endif
5349
5350 tcurrent = (unsigned long) time (NULL);
5351
5352 /* check for time limit exceeded
5353 */
5354 if ((tcurrent - tchkold) > (unsigned int) 3 )
5355 {
5356 tchkold = tcurrent;
5357 client_time_check(/* all_clients */);
5358 }
5359
5360 /* seed / re-seed the PRNG if required
5361 */
5362 (void) taus_seed();
5363
5364 /* select() timeout handling.
5365 */
5366 if ( num_sel == 0 ) /* timeout - no connection */
5367 {
5368 if (sh_html_write(all_clients) < 0)
5369 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_E_HTML);
5370 continue;
5371 }
5372
5373 /* New connection.
5374 */
5375 if ( FD_ISSET(conns[0].fd , &readset )) /* a new connection */
5376 {
5377 --num_sel;
5378 status = 0;
5379 if (nowconn < maxconn && sig_terminate == 0 && sig_termfast == 0)
5380 {
5381 i = SH_MINSOCK;
5382 while (i < maxconn)
5383 {
5384 if (conns[i].state == CONN_FREE)
5385 {
5386 status = sh_forward_accept (conns[0].fd, &conns[i]);
5387 if (status == 0)
5388 {
5389 high_fd =
5390 (high_fd > conns[i].fd ? high_fd : conns[i].fd);
5391 ++server_status.conn_open;
5392 ++server_status.conn_total;
5393 server_status.last = time (NULL);
5394 }
5395 break;
5396 }
5397 ++i;
5398 }
5399 }
5400 if (status == 0)
5401 continue;
5402 }
5403
5404 /* check for commands on the socket
5405 */
5406 if (conns[1].fd > (-1) && FD_ISSET(conns[1].fd , &readset ))
5407 {
5408 sh_socket_poll();
5409 }
5410
5411#ifdef INET_SYSLOG
5412 if (conns[2].fd > (-1) && FD_ISSET(conns[2].fd , &readset ))
5413 {
5414 recv_syslog_socket (conns[2].fd);
5415 }
5416#endif
5417
5418 /* Check for pending read/write on the rest of the sockets.
5419 */
5420 for ( i = SH_MINSOCK; num_sel > 0 && i < maxconn; ++i )
5421 {
5422 if (sig_termfast == 1)
5423 break;
5424
5425 cx = &conns[i];
5426 if ( cx->state == CONN_READING &&
5427 FD_ISSET( cx->fd, &readset ) )
5428 {
5429 --num_sel;
5430 sh_forward_do_read ( cx );
5431 }
5432 else if ( cx->state == CONN_SENDING &&
5433 FD_ISSET( cx->fd, &writeset ) )
5434 {
5435 --num_sel;
5436 sh_forward_do_write ( cx );
5437 }
5438 }
5439 /* continue */
5440 }
5441 /* notreached */
5442}
5443
5444void free_client_tree (void)
5445{
5446 SL_ENTER(_("free_client_tree"));
5447 zAVLFreeTree (all_clients, free_client);
5448 SL_RET0(_("free_client_tree"));
5449}
5450
5451void sh_forward_free_all ()
5452{
5453 register int i;
5454
5455 SL_ENTER(_("sh_forward_free_all"));
5456
5457 if (conns != NULL)
5458 for (i = SH_MINSOCK; i < maxconn; ++i)
5459 {
5460 sh_forward_do_free ( &conns[i]);
5461 }
5462
5463
5464 free_client_tree ();
5465
5466 if (conns != NULL)
5467 SH_FREE (conns);
5468
5469 SL_RET0(_("sh_forward_free_all"));
5470}
5471
5472#ifdef INET_SYSLOG
5473
5474#ifdef HAVE_INET_ATON
5475static char * my_inet_ntoa(struct in_addr in)
5476{
5477 return inet_ntoa(in);
5478}
5479#else
5480static char * my_inet_ntoa(struct in_addr in)
5481{
5482 unsigned char a, b, c, d;
5483 static char foo[16];
5484 char bar[4];
5485 memcpy (bar, &(in.s_addr), 4); /* memory alignment (?) */
5486 memcpy (&a, &bar[0], 1);
5487 memcpy (&b, &bar[1], 1);
5488 memcpy (&c, &bar[2], 1);
5489 memcpy (&d, &bar[3], 1);
5490 sprintf(foo, "%d.%d.%d.%d", /* known to fit */
5491 (int) a, (int) b, (int) c, (int) d);
5492 return foo;
5493}
5494#endif
5495
5496
5497/* Unlike Linux / FreeBSD, most systems don't define the stuff below
5498 * in syslog.h
5499 */
5500
5501#ifndef LOG_FAC
5502#define LOG_FAC(p) (((p) & LOG_FACMASK) >> 3)
5503#endif
5504
5505#ifndef LOG_PRI
5506#define LOG_PRI(p) ((p) & LOG_PRIMASK)
5507#endif
5508
5509typedef struct sh_code {
5510 char *c_name;
5511 int c_val;
5512} SH_CODE;
5513
5514SH_CODE sh_facilitynames[] =
5515{
5516#ifdef LOG_AUTH
5517 { N_("auth"), LOG_AUTH },
5518#endif
5519#ifdef LOG_AUTHPRIV
5520 { N_("authpriv"), LOG_AUTHPRIV },
5521#endif
5522#ifdef LOG_CRON
5523 { N_("cron"), LOG_CRON },
5524#endif
5525#ifdef LOG_DAEMON
5526 { N_("daemon"), LOG_DAEMON },
5527#endif
5528#ifdef LOG_FTP
5529 { N_("ftp"), LOG_FTP },
5530#endif
5531#ifdef LOG_KERN
5532 { N_("kern"), LOG_KERN },
5533#endif
5534#ifdef LOG_LPR
5535 { N_("lpr"), LOG_LPR },
5536#endif
5537#ifdef LOG_MAIL
5538 { N_("mail"), LOG_MAIL },
5539#endif
5540#ifdef INTERNAL_MARK
5541 { N_("mark"), INTERNAL_MARK }, /* INTERNAL */
5542#endif
5543#ifdef LOG_NEWS
5544 { N_("news"), LOG_NEWS },
5545#endif
5546#ifdef LOG_AUTH
5547 { N_("security"), LOG_AUTH }, /* DEPRECATED */
5548#endif
5549#ifdef LOG_SYSLOG
5550 { N_("syslog"), LOG_SYSLOG },
5551#endif
5552#ifdef LOG_USER
5553 { N_("user"), LOG_USER },
5554#endif
5555#ifdef LOG_UUCP
5556 { N_("uucp"), LOG_UUCP },
5557#endif
5558#ifdef LOG_LOCAL0
5559 { N_("local0"), LOG_LOCAL0 },
5560#endif
5561#ifdef LOG_LOCAL1
5562 { N_("local1"), LOG_LOCAL1 },
5563#endif
5564#ifdef LOG_LOCAL2
5565 { N_("local2"), LOG_LOCAL2 },
5566#endif
5567#ifdef LOG_LOCAL3
5568 { N_("local3"), LOG_LOCAL3 },
5569#endif
5570#ifdef LOG_LOCAL4
5571 { N_("local4"), LOG_LOCAL4 },
5572#endif
5573#ifdef LOG_LOCAL5
5574 { N_("local5"), LOG_LOCAL5 },
5575#endif
5576#ifdef LOG_LOCAL6
5577 { N_("local6"), LOG_LOCAL6 },
5578#endif
5579#ifdef LOG_LOCAL7
5580 { N_("local7"), LOG_LOCAL7 },
5581#endif
5582 { NULL, -1 }
5583};
5584
5585
5586SH_CODE sh_prioritynames[] =
5587{
5588#ifdef LOG_ALERT
5589 { N_("alert"), LOG_ALERT },
5590#endif
5591#ifdef LOG_CRIT
5592 { N_("crit"), LOG_CRIT },
5593#endif
5594#ifdef LOG_DEBUG
5595 { N_("debug"), LOG_DEBUG },
5596#endif
5597#ifdef LOG_EMERG
5598 { N_("emerg"), LOG_EMERG },
5599#endif
5600#ifdef LOG_ERR
5601 { N_("err"), LOG_ERR },
5602#endif
5603#ifdef LOG_ERR
5604 { N_("error"), LOG_ERR }, /* DEPRECATED */
5605#endif
5606#ifdef LOG_INFO
5607 { N_("info"), LOG_INFO },
5608#endif
5609#ifdef INTERNAL_NOPRI
5610 { N_("none"), INTERNAL_NOPRI }, /* INTERNAL */
5611#endif
5612#ifdef LOG_NOTICE
5613 { N_("notice"), LOG_NOTICE },
5614#endif
5615#ifdef LOG_EMERG
5616 { N_("panic"), LOG_EMERG }, /* DEPRECATED */
5617#endif
5618#ifdef LOG_WARNING
5619 { N_("warn"), LOG_WARNING }, /* DEPRECATED */
5620#endif
5621#ifdef LOG_WARNING
5622 { N_("warning"), LOG_WARNING },
5623#endif
5624 { NULL, -1 }
5625};
5626
5627static int enable_syslog_socket = S_FALSE;
5628
5629static int recv_syslog_socket (int fd)
5630{
5631 static time_t return_next = 0;
5632 int priority = 0;
5633 int fac, pri;
5634 int i;
5635 char * cfac = NULL;
5636 char * cpri = NULL;
5637 int res;
5638 char * tmp;
5639 char * bptr;
5640 char * ptr = NULL;
5641 char buf[1048];
5642 struct sockaddr_in from;
5643 char errbuf[SH_ERRBUF_SIZE];
5644
5645 /* The 6th argument in recvfrom is *socklen_t in Linux and *BSD,
5646 * but *int everywhere else. Because socklen_t is unsigned int, there
5647 * should be no problem as long as sizeof(struct sockaddr_in) < INT_MAX ...
5648 */
5649 int fromlen = sizeof(from);
5650
5651 if (enable_syslog_socket == S_FALSE)
5652 return 0;
5653
5654 SL_ENTER(_("recv_syslog_socket"));
5655
5656 if (return_next > 0)
5657 {
5658 if ( (time(NULL) - return_next) < 2)
5659 SL_RETURN( 0, _("recv_syslog_socket"));
5660 else
5661 return_next = 0;
5662 }
5663
5664 res = recvfrom(fd, buf, 1047, 0, (struct sockaddr *) &from, &fromlen);
5665
5666 if (res > 0)
5667 {
5668 res = (res < 1047) ? res : 1047;
5669 buf[res] = '\0';
5670 if (res > 1 && buf[res-1] == '\n')
5671 buf[res-1] = '\0';
5672
5673 /* here we expect an xml formatted message, thus we don't
5674 escape xml special chars (flag == 0) */
5675 /* commented out to not escape twice */
5676 /* bptr = sh_tools_safe_name(buf, 0); */
5677 bptr = buf;
5678
5679 if (!bptr || !(*bptr))
5680 {
5681 res = errno;
5682 TPT(( 0, FIL__, __LINE__, _("msg=<UDP error: %d>\n"), res));
5683 sh_error_handle((-1), FIL__, __LINE__, res, MSG_ERR_SYSLOG,
5684 sh_error_message(res, errbuf, sizeof(errbuf)),
5685 my_inet_ntoa(from.sin_addr));
5686 SL_RETURN( (-1), _("recv_syslog_socket"));
5687 }
5688
5689 TPT(( 0, FIL__, __LINE__, _("msg=<UDP message from %s>\n"),
5690 my_inet_ntoa(from.sin_addr)));
5691 ptr = bptr;
5692 i = 0;
5693 if (*ptr == '<')
5694 {
5695 ++ptr; ++i;
5696 while (i < res &&
5697 (unsigned char) *ptr > 47 && (unsigned char) *ptr < 58)
5698 {
5699 priority = 10 * priority + (*ptr - '0');
5700 ++ptr;
5701 ++i;
5702 }
5703 if (*ptr == '>')
5704 ++ptr;
5705 }
5706 fac = LOG_FAC(priority);
5707 i = 0;
5708 while (sh_facilitynames[i].c_name != NULL)
5709 {
5710 if (sh_facilitynames[i].c_val == (fac<<3))
5711 { cfac = sh_util_strdup(_(sh_facilitynames[i].c_name)); break; }
5712 ++i;
5713 }
5714 pri = LOG_PRI(priority);
5715 i = 0;
5716 while (sh_prioritynames[i].c_name != NULL)
5717 {
5718 if (sh_prioritynames[i].c_val == pri)
5719 { cpri = sh_util_strdup(_(sh_prioritynames[i].c_name)); break; }
5720 ++i;
5721 }
5722
5723 /* here we do not expect an xml formatted message, thus we escape
5724 xml special chars (flag == 1) */
5725 tmp = sh_tools_safe_name (ptr, 1);
5726 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_INET_SYSLOG,
5727 my_inet_ntoa(from.sin_addr),
5728 (cfac == NULL) ? _("none") : cfac,
5729 (cpri == NULL) ? _("none") : cpri,
5730 (ptr == NULL) ? _("none") : ptr);
5731 if (cfac != NULL)
5732 SH_FREE(cfac);
5733 if (cpri != NULL)
5734 SH_FREE(cpri);
5735 SH_FREE(tmp);
5736 /* SH_FREE(bptr); */
5737 }
5738
5739 else if (res < 0 && errno != EINTR)
5740 {
5741 res = errno;
5742 TPT(( 0, FIL__, __LINE__, _("msg=<UDP error: %d>\n"), res));
5743 sh_error_handle((-1), FIL__, __LINE__, res, MSG_ERR_SYSLOG,
5744 sh_error_message(res, errbuf, sizeof(errbuf)),
5745 my_inet_ntoa(from.sin_addr));
5746
5747 /* don't accept anything the next 2 seconds
5748 */
5749 return_next = time(NULL);
5750 SL_RETURN( (-1), _("recv_syslog_socket"));
5751 }
5752 SL_RETURN( (0), _("recv_syslog_socket"));
5753}
5754
5755int set_syslog_active(const char * c)
5756{
5757 return sh_util_flagval(c, &enable_syslog_socket);
5758}
5759
5760/* callerFlag == S_TRUE means override the enable_syslog_socket flag
5761 */
5762int create_syslog_socket (int callerFlag)
5763{
5764 int flag = 1; /* non-zero to enable an option */
5765 int sock;
5766 int errnum;
5767 int res;
5768 struct sockaddr_in addr;
5769 int addrlen = sizeof(addr);
5770
5771 SL_ENTER(_("create_syslog_socket"));
5772
5773 if (callerFlag == S_FALSE)
5774 {
5775 if (enable_syslog_socket == S_FALSE && syslog_sock >= 0)
5776 {
5777 /* user does not wish to use this facility
5778 */
5779 TPT(( 0, FIL__, __LINE__, _("msg=<close syslog socket>\n")));
5780 close(syslog_sock);
5781 syslog_sock = -1;
5782 }
5783 SL_RETURN((-1), _("create_syslog_socket"));
5784 }
5785
5786 sh_forward_printerr (NULL, 0, 514, __LINE__);
5787
5788 /* create the socket, bind() it and listen()
5789 */
5790 sock = socket(AF_INET, SOCK_DGRAM, 0);
5791
5792 if (sock < 0)
5793 {
5794 errnum = errno;
5795 sh_forward_printerr (_("syslog socket"), errnum, 514, __LINE__);
5796 SL_RETURN((-1), _("create_syslog_socket"));
5797 }
5798 (void) retry_fcntl( FIL__, __LINE__, sock, F_SETFD, 1 );
5799
5800 if ( setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
5801 (void *) &flag, sizeof(flag)) < 0 )
5802 {
5803 errnum = errno;
5804 sh_forward_printerr (_("syslog setsockopt SO_REUSEADDR"),
5805 errnum, 514, __LINE__);
5806 SL_RETURN((-1), _("create_syslog_socket"));
5807 }
5808
5809#if defined(SO_BSDCOMPAT)
5810 if ( setsockopt(sock, SOL_SOCKET, SO_BSDCOMPAT,
5811 (void *) &flag, sizeof(flag)) < 0 )
5812 {
5813 errnum = errno;
5814 sh_forward_printerr (_("syslog setsockopt SO_BSDCOMPAT"),
5815 errnum, 514, __LINE__);
5816 SL_RETURN((-1), _("create_syslog_socket"));
5817 }
5818#endif
5819
5820 memset(&addr, 0, sizeof(addr));
5821 addr.sin_family = AF_INET;
5822 addr.sin_port = htons(514);
5823
5824 res = bind(sock, (struct sockaddr *) &addr, addrlen);
5825
5826 if ( res < 0)
5827 {
5828 errnum = errno;
5829 sh_forward_printerr (_("syslog bind"), errnum, 514, __LINE__);
5830 close(sock);
5831 SL_RETURN((-1), _("create_syslog_socket"));
5832 }
5833
5834 syslog_sock = sock;
5835
5836 SL_RETURN((sock), _("create_syslog_socket"));
5837}
5838/* #ifdef INET_SYSLOG */
5839#endif
5840
5841
5842
5843/* #ifdef SH_WITH_SERVER */
5844#endif
5845
5846
5847
5848
5849
5850
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