source: trunk/src/sh_forward.c@ 249

Last change on this file since 249 was 248, checked in by katerina, 15 years ago

Code to track down originating site for ticket #163.
File size: 145.8 KB
RevLine 
[1]1/* SAMHAIN file system integrity testing */
2/* Copyright (C) 1999, 2000 Rainer Wichmann */
3/* */
4/* This program is free software; you can redistribute it */
5/* and/or modify */
6/* it under the terms of the GNU General Public License as */
7/* published by */
8/* the Free Software Foundation; either version 2 of the License, or */
9/* (at your option) any later version. */
10/* */
11/* This program is distributed in the hope that it will be useful, */
12/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
13/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
14/* GNU General Public License for more details. */
15/* */
16/* You should have received a copy of the GNU General Public License */
17/* along with this program; if not, write to the Free Software */
18/* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
19
20#include "config_xor.h"
21
22#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"
[214]133#include "sh_nmail.h"
[1]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,
[34]141 char * payload, unsigned long payload_size,
[1]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
[12]180extern int flag_err_debug;
181extern int flag_err_info;
182
[1]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
[20]204int sh_forward_set_strip (const char * str)
[1]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 }
[11]260 name_2[i] = '\0';
[1]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;
[137]279 char hashbuf[KEYBUF_SIZE];
[1]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,
[137]300 sh_tiger_hash(skey->vernam, TIGER_DATA, PW_LEN,
301 hashbuf, sizeof(hashbuf)),
[1]302 KEY_LEN+1);
303 }
304 else
305 {
306 (void) sl_strlcpy (skey->vernam, password, KEY_LEN+1);
307 }
308
[34]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)))
[1]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,
[137]324 (unsigned long) sl_strlen(combi),
325 hashbuf, sizeof(hashbuf)),
[1]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
[27]342#if defined(SH_WITH_CLIENT) || defined(SH_WITH_SERVER)
[1]343
344static int count_dev_server = 0;
345
346void reset_count_dev_server(void)
347{
348 count_dev_server = 0;
349 return;
350}
351
[22]352int sh_forward_setlogserver (const char * address)
[1]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;
[132]391 char expbuf[SH_ERRBUF_SIZE];
[1]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);
[34]402 msg2buf = sh_tools_makePack (head, msgbuf, length,
[1]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));
[34]414 length2 = (B_SIZ * blkfac);
415 if ((rem > 0) && (length2+B_SIZ) > length2)
416 length2 += B_SIZ;
417 else
418 rem = 0;
[1]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,
[132]428 errorExplain(err_num, expbuf, sizeof(expbuf)),
[1]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,
[132]439 errorExplain(err_num, expbuf, sizeof(expbuf)),
[1]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,
[132]453 errorExplain(err_num, expbuf, sizeof(expbuf)),
[1]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;
[132]555 char expbuf[SH_ERRBUF_SIZE];
[1]556#else
557 docrypt = SL_FALSE; /* dummy to fix compiler warning */
558#endif
559
560 SL_ENTER(_("sh_forward_receive_intern"));
561
[34]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
[1]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
[34]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
[1]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;
[34]654
[1]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,
[132]662 errorExplain(err_num, expbuf, sizeof(expbuf)),
[1]663 _("sh_forward_receive_intern: cipherInit"));
664
[34]665 /* here we want to have (length % B_SIZ != 0), such that the
666 * terminating '\0' cannot be overwritten
667 */
[1]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,
[132]675 errorExplain(err_num, expbuf, sizeof(expbuf)),
[1]676 _("sh_forward_receive_intern: blockDecrypt"));
677 memcpy(q, outBlock, B_SIZ);
[34]678 p += B_SIZ;
679 q += B_SIZ;
[1]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
[27]738static unsigned int ServerPort = SH_DEFAULT_PORT;
[1]739
[27]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
[1]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 {
[214]793 (void) push_tail_list (fifo, popmsg, 0, NULL);
[1]794 SH_FREE(popmsg);
[214]795 if (SH_FIFO_MAX == push_list (fifo, errmsg, 0,NULL))
[1]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;
[214]814 if (SH_FIFO_MAX == push_list (fifo, errmsg, 0, NULL))/* push on stack */
[1]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
[219]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
[1]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;
[132]907 char expbuf[SH_ERRBUF_SIZE];
[1]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;
[133]914 char hashbuf[KEYBUF_SIZE];
915 char sigbuf[KEYBUF_SIZE];
[1]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,
[27]949 ServerPort,
[1]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 */
[137]1036 ticks = (UINT32) taus_get ();
1037
[1]1038 (void) sl_strlcpy(nonce_u,
1039 sh_tiger_hash((char *) &ticks,
1040 TIGER_DATA,
[133]1041 (unsigned long)sizeof(UINT32),
1042 hashbuf, sizeof(hashbuf)),
[1]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,
[133]1052 (unsigned long)sl_strlen(temp),
1053 hashbuf, sizeof(hashbuf)),
[1]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,
[132]1083 errorExplain(err_num, expbuf, sizeof(expbuf)),
[1]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,
[132]1090 errorExplain(err_num, expbuf, sizeof(expbuf)),
[1]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);
[34]1100 memset(answer, 0, 512);
[1]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 {
[133]1190 sl_strlcpy(u_real, sh_tiger_hash(head_u, TIGER_DATA, 4,
1191 hashbuf, sizeof(hashbuf)),
[1]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 */
[225]1202 if (foo_Sc != NULL && 0 == sh_srp_check_zero (foo_Sc))
[1]1203 {
[133]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);
[1]1211
[133]1212
[1]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 */
[133]1242 char M_buf[KEY_LEN+1];
[1]1243 M = sh_srp_M (foo_A, foo_M1,
1244 sh_tiger_hash(foo_Sc,
1245 TIGER_DATA,
[133]1246 sl_strlen(foo_Sc),
1247 hashbuf, sizeof(hashbuf)),
1248 M_buf, sizeof(M_buf)
1249 );
[1]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,
[133]1256 sl_strlen(foo_Sc),
1257 hashbuf, sizeof(hashbuf)),
[1]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,
[132]1270 errorExplain(err_num, expbuf, sizeof(expbuf)),
[1]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,
[132]1278 errorExplain(err_num, expbuf, sizeof(expbuf)),
[1]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);
[34]1298 memset(answer, '\0', 512);
[1]1299 MUNLOCK(answer, 512);
1300 SH_FREE(answer);
1301 SL_RETURN( (-1), _("sh_forward_try_impl"));
1302 }
1303 else
1304 {
[12]1305 if (flag_err_info == SL_TRUE)
1306 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_AUTH);
[1]1307 }
1308 }
1309
1310#endif
1311
1312 /* no message, just session key negotiated
1313 */
1314 if (errmsg == NULL)
1315 {
1316 timeout_val = 1;
[34]1317 memset(answer, 0, 512);
[1]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,
[133]1335 sl_strlen(sh.host.name),
1336 sigbuf, sizeof(sigbuf)),
[1]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,
[133]1408 sl_strlen(buffer),
1409 sigbuf, sizeof(sigbuf)),
[1]1410 KEY_LEN+1);
1411 TPT((0, FIL__, __LINE__, _("msg=<sign %s.>\n"),
1412 sh_util_siggen(skey->session, buffer,
[133]1413 sl_strlen(buffer), sigbuf, sizeof(sigbuf))));
[1]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,
[133]1475 sl_strlen(buffer),
1476 sigbuf, sizeof(sigbuf)),
[1]1477 KEY_LEN);
1478 TPT((0, FIL__, __LINE__, _("msg=<sign %s.>\n"),
1479 sh_util_siggen(skey->session, buffer,
[133]1480 sl_strlen(buffer), sigbuf, sizeof(sigbuf))));
[1]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,
[133]1510 pos,
1511 sigbuf, sizeof(sigbuf)),
[1]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);
[27]1522 }
1523#ifdef SH_WITH_CLIENT
1524 else {
[1]1525 sh_socket_server_cmd(buffer);
1526 }
[27]1527#endif
[1]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
[12]1538 if (flag_err_debug == SL_TRUE)
1539 sh_error_handle((-1), FIL__, __LINE__, 0,
1540 MSG_TCP_CONF);
[1]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 */
[137]1614 ticks = (UINT32) taus_get ();
[1]1615
1616 (void) sl_strlcpy(nclt,
1617 sh_tiger_hash((char *) &ticks,
1618 TIGER_DATA,
[133]1619 (unsigned long)sizeof(UINT32),
1620 hashbuf, sizeof(hashbuf)),
[1]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,
[133]1629 (unsigned long)sl_strlen(buffer),
1630 hashbuf, sizeof(hashbuf)),
[1]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,
[34]1690 TRANS_BYTES + 255);
[1]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;
[219]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 ***/
[1]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);
[12]1745 if (flag_err_info == SL_TRUE)
1746 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_FOK);
[1]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 {
[132]1790 char errbuf[SH_ERRBUF_SIZE];
[1]1791 conn_state = BAD;
1792 timeout_val *= 2;
[132]1793 if (flag_err < 0 || NULL == sh_error_message(flag_err, errbuf, sizeof(errbuf)))
[1]1794 flag_err = EIO;
1795 sh_error_handle((-1), FIL__, __LINE__, flag_err, MSG_TCP_ECONN,
[132]1796 sh_error_message(flag_err, errbuf, sizeof(errbuf)));
[1]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
[20]1813int sh_forward_make_client (const char * str)
[1]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;
[133]1819 char hashbuf[KEYBUF_SIZE];
[1]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,
[133]1847 sh_tiger_hash ((char*)in, TIGER_DATA, PW_LEN,
1848 hashbuf, sizeof(hashbuf)),
[1]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
[20]1862int sh_forward_make_client (const char * str)
[1]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;
[133]1870 char hashbuf[KEYBUF_SIZE];
[1]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);
[133]1900 sl_strlcpy(salt, sh_tiger_hash(key, TIGER_DATA, KEY_LEN,
1901 hashbuf, sizeof(hashbuf)),
1902 17);
[1]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 }
[210]1912 fprintf(stdout, "%s",_("ERROR initializing BigNum library.\n"));
[1]1913 fflush (stdout);
1914 _exit(EXIT_FAILURE);
1915 return -1;
1916}
1917#endif
1918
1919
[20]1920int sh_forward_create_password (const char * dummy)
[1]1921{
1922 UINT32 val[2];
1923 char output[KEY_LEN+1];
[133]1924 char hashbuf[KEYBUF_SIZE];
[1]1925
[137]1926 val[0] = taus_get ();
1927 val[1] = taus_get ();
[1]1928
1929 sl_strlcpy (output,
[133]1930 sh_tiger_hash((char *)(&val[0]), TIGER_DATA, 2*sizeof(UINT32),
1931 hashbuf, sizeof(hashbuf)),
[1]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
[22]2011int sh_forward_use_clt_class (const char * c)
[1]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
[22]2019int sh_forward_use_clt_sev (const char * c)
[1]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
[3]2050
[22]2051int sh_forward_register_client (const char * str)
[1]2052{
2053 client_t * newclt;
2054 client_t * testclt;
2055
[22]2056 const char * ptr;
[1]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 {
[22]2079 (void) safe_logger (0, 0, NULL);
[1]2080 aud__exit(FIL__, __LINE__, EXIT_FAILURE);
2081 }
2082 }
2083
[34]2084 if ((sepnum == 2) && (sep[0] > 0) && (sep[1] > sep[0]))
[1]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;
[132]2110 (void) sh_unix_time(0, newclt->timestamp[CLT_INACTIVE], TIM_MAX);
[22]2111 /* truncate */
[1]2112 sl_strlcpy(newclt->hostname, &str[0], sep[0]+1);
[22]2113 /* truncate */
[1]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
[11]2177static char zap_challenge[SH_CHALLENGE_SIZE] = { 0 };
2178
[1]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 }
[11]2208 memcpy(conn->challenge, zap_challenge, SH_CHALLENGE_SIZE);
[1]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;
[11]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';
[1]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 */
[170]2249void sh_forward_mark_dead (void)
[1]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 */
[170]2267void sh_forward_clean_tree (void)
[1]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{
[34]2302 /* register unsigned long i; */
[1]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;
[132]2314 char expbuf[SH_ERRBUF_SIZE];
[1]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);
[34]2332 length2 = (B_SIZ * blkfac);
2333 if (rem > 0 && (length2 + B_SIZ) > length2)
2334 length2 += B_SIZ;
2335 else
2336 rem = 0;
[1]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 }
[34]2374 else if ((S_TRUE == docrypt) && ((protocol & SH_PROTO_ENC) != 0) &&
2375 ((length2 + 1) > length2))
[1]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,
[132]2387 errorExplain(err_num, expbuf, sizeof(expbuf)),
[1]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,
[132]2397 errorExplain(err_num, expbuf, sizeof(expbuf)),
[1]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,
[132]2413 errorExplain(err_num, expbuf, sizeof(expbuf)),
[1]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 {
[34]2423 if ((length2 + 1) < length2) --length2;
[1]2424 conn->buf = SH_ALLOC(length2 + 1);
2425
[34]2426 memcpy(conn->buf, msg, length2);
2427 /*
[1]2428 for (i = 0; i < length2; ++i)
2429 conn->buf[i] = msg[i];
[34]2430 */
[1]2431 conn->buf[length2] = '\0';
2432 TPT((0, FIL__, __LINE__, _("msg=<no encryption done>\n") ));
2433 }
2434#else
[34]2435 if ((length2 + 1) < length2) --length2;
[1]2436 conn->buf = SH_ALLOC(length2 + 1);
2437
[34]2438 memcpy(conn->buf, msg, length2);
2439 /*
[1]2440 for (i = 0; i < length; ++i)
2441 conn->buf[i] = msg[i];
[34]2442 */
[1]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;
[132]2496 (void) sh_unix_time(0, conn->timestamp[status], TIM_MAX);
[1]2497
2498#if defined(WITH_EXTERNAL)
[22]2499 sl_snprintf(msg, sizeof(msg), _("%s %s %s"),
2500 conn->hostname, conn->timestamp[status], _(clt_stat[status]));
[1]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
[22]2509int sh_forward_set_time_limit (const char * c)
[1]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 */
[170]2528static int client_time_check(void)
[1]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
[22]2559int sh_forward_lookup_level (const char * c)
[1]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
[22]2713int set_socket_peer (const char * c)
[1]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;
[22]2846 size_t len;
[1]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;
[132]2861 char expbuf[SH_ERRBUF_SIZE];
[1]2862#endif
2863
2864
2865#ifdef USE_SRP_PROTOCOL
2866 char * foo_B;
2867 char * foo_Ss;
2868#endif
[133]2869 char hashbuf[KEYBUF_SIZE];
2870 char sigbuf[KEYBUF_SIZE];
[1]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';
[12]2931 if (flag_err_info == SL_TRUE)
2932 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_FAUTH,
2933 &(conn->buf[KEY_LEN]));
[22]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);
[1]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
[34]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
[1]2959 sl_strlcpy (conn->K,
2960 sh_util_siggen(this_client->session_key,
2961 &(conn->buf[KEY_LEN]),
[133]2962 sl_strlen(&(conn->buf[KEY_LEN])),
2963 sigbuf, sizeof(sigbuf)),
[1]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]),
[133]2972 sl_strlen(&(conn->buf[KEY_LEN])),
2973 sigbuf, sizeof(sigbuf))));
[1]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
[137]2998 ticks = (UINT32) taus_get ();
2999
[1]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,
[133]3008 TIGER_DATA, sizeof(UINT32),
3009 hashbuf, sizeof(hashbuf)),
[1]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);
[22]3037 sl_strlcat(conn->A, conn->buf, /* truncate */
[1]3038 2*KEY_LEN+1);
3039 sl_strlcat(conn->A, conn->client_entry->session_key,
3040 3*KEY_LEN+1);
[133]3041 sl_strlcpy (conn->K, sh_tiger_hash(conn->A,TIGER_DATA,3*KEY_LEN,
3042 hashbuf, sizeof(hashbuf)),
[1]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 {
[248]3135 sfd = sl_open_read(FIL__, __LINE__,
3136 conn->FileName, SL_YESPRIV);
[1]3137 if (!SL_ISERROR(sfd))
3138 {
3139 read_buf = SH_ALLOC(TRANS_BYTES);
3140 bytes = sl_read (sfd, read_buf, TRANS_BYTES);
3141 sl_close(sfd);
3142 }
3143
3144 else
3145 {
3146 sh_error_handle((-1), FIL__, __LINE__, sfd,
3147 MSG_E_ACCESS,
3148 (long) geteuid(),
3149 conn->FileName);
3150 }
3151 if (bytes >= 0)
3152 {
3153#ifdef SH_ENCRYPT
3154 /* need to send N * B_SIZ bytes
3155 */
3156 blkfac = bytes / B_SIZ;
3157 rem = bytes - (blkfac * B_SIZ);
3158 if (rem != 0)
3159 {
3160 memset(&read_buf[bytes], '\n', (B_SIZ-rem));
3161 ++blkfac;
3162 send_bytes = blkfac * B_SIZ;
3163 }
3164 else
3165 send_bytes = bytes;
3166
3167 send_buf = hash_me(conn->K, read_buf,
3168 send_bytes);
3169
3170 sh_forward_prep_send_crypt (conn, send_buf,
3171 send_bytes+KEY_LEN,
3172 _("FILE"),
3173 SH_PROTO_BIG|conn->client_entry->encf_flag);
3174#else
3175 send_buf = hash_me(conn->K, read_buf, bytes);
3176 sh_forward_prep_send_crypt (conn, send_buf,
3177 bytes+KEY_LEN,
3178 _("FILE"), SH_PROTO_BIG);
3179#endif
3180 conn->FileSent += bytes;
3181 if (send_buf != NULL)
3182 {
3183 SH_FREE(send_buf);
3184 }
3185 SH_FREE(read_buf);
3186 }
3187 }
3188
3189 if (conn == NULL || conn->FileName == NULL ||
3190 SL_ISERROR(sfd) || bytes < 0)
3191 {
3192 sh_error_handle((-1), FIL__, __LINE__, sfd, MSG_TCP_NFILE,
3193 conn->peer,
3194 (conn->FileName == NULL) ?
3195 _("(NULL)") : conn->FileName);
3196 status_update (conn->client_entry, CLT_FAILED);
3197 sh_forward_do_free (conn);
3198 }
3199
3200 }
3201
3202 else if (0 == check_request_nerr((char *)&(conn->head[3]),
3203 _("RECV")) &&
3204 conn->client_entry != NULL &&
3205 conn->K != NULL &&
3206 conn->FileName != NULL)
3207 {
3208
3209 TPT(( 0, FIL__, __LINE__,
3210 _("msg=<File transfer - RCVT (5+).>\n")));
3211
3212 if (conn->FileSent == conn->FileLength)
3213 {
3214 send_buf = hash_me(conn->K, conn->peer,
3215 sl_strlen(conn->peer));
3216#ifdef SH_ENCRYPT
3217 sh_forward_prep_send_crypt (conn, send_buf,
3218 sl_strlen(conn->peer)+KEY_LEN,
3219 _("EEOT"),
3220 SH_PROTO_BIG|conn->client_entry->encf_flag);
3221#else
3222 sh_forward_prep_send_crypt (conn, send_buf,
3223 sl_strlen(conn->peer)+KEY_LEN,
3224 _("EEOT"),
3225 SH_PROTO_BIG);
3226#endif
3227 SH_FREE(send_buf);
3228 }
3229 else
3230 {
3231 bytes = -1;
[248]3232 sfd = sl_open_read(FIL__, __LINE__,
3233 conn->FileName, SL_YESPRIV);
[1]3234 if (!SL_ISERROR(sfd))
3235 {
3236 read_buf = SH_ALLOC(TRANS_BYTES);
3237 sl_seek (sfd, (off_t) conn->FileSent);
3238 bytes = sl_read (sfd, read_buf, TRANS_BYTES);
3239 sl_close(sfd);
3240 }
3241 else
3242 {
3243 sh_error_handle((-1), FIL__, __LINE__, sfd,
3244 MSG_E_ACCESS,
3245 (long) geteuid(),
3246 conn->FileName);
3247 }
3248 if (bytes >= 0)
3249 {
3250#ifdef SH_ENCRYPT
3251 /* need to send N * B_SIZ bytes
3252 */
3253 blkfac = bytes / B_SIZ;
3254 rem = bytes - (blkfac * B_SIZ);
3255 if (rem != 0)
3256 {
3257 memset(&read_buf[bytes], '\n', (B_SIZ-rem));
3258 ++blkfac;
3259 send_bytes = blkfac * B_SIZ;
3260 }
3261 else
3262 send_bytes = bytes;
3263
3264 send_buf = hash_me(conn->K, read_buf,
3265 send_bytes);
3266
3267 sh_forward_prep_send_crypt (conn, send_buf,
3268 send_bytes+KEY_LEN,
3269 _("FILE"),
3270 SH_PROTO_BIG|conn->client_entry->encf_flag);
3271#else
3272
3273 send_buf = hash_me(conn->K, read_buf, bytes);
3274 sh_forward_prep_send_crypt (conn, send_buf,
3275 bytes+KEY_LEN,
3276 _("FILE"),
3277 SH_PROTO_BIG);
3278#endif
3279
3280 conn->FileSent += bytes;
3281 SH_FREE(send_buf);
3282 SH_FREE(read_buf);
3283 }
3284 else
3285 {
3286 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_NFILE,
3287 conn->peer,
3288 (conn->FileName == NULL) ?
3289 _("(NULL)") : conn->FileName);
3290 status_update (conn->client_entry, CLT_FAILED);
3291 sh_forward_do_free (conn);
3292 }
3293 }
3294 }
3295
3296
3297 else if (0 == check_request_nerr((char *)&(conn->head[3]),
3298 _("EOTE")) &&
3299 conn->client_entry != NULL)
3300 {
3301
3302 TPT(( 0, FIL__, __LINE__,
3303 _("msg=<File transfer - EOTE (7).>\n")));
3304
[12]3305 if (flag_err_info == SL_TRUE)
3306 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_OKFILE,
3307 conn->peer);
[1]3308
3309 if ((conn->client_entry->status_now != CLT_SUSPEND) &&
3310 (conn->client_entry->status_now != CLT_TOOLONG))
3311 { status_update (conn->client_entry, CLT_FILE); }
3312 else
3313 { conn->client_entry->session_key[0] = '\0'; }
3314 conn->client_entry->last_connect = time (NULL);
3315 sh_forward_do_free (conn);
3316 }
3317
3318
3319 /* client does something unexpected
3320 */
3321 else /* ---- ??? ----- */
3322 {
3323 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_FINV,
3324 1, conn->pass, conn->peer,
3325 '\\', conn->head[3], '\\',conn->head[4],
3326 '\\', conn->head[5], '\\',conn->head[6]);
3327 status_update (conn->client_entry, CLT_FAILED);
3328 sh_forward_do_free (conn);
3329 }
3330 }
3331
3332 else if (state == SH_DO_WRITE) /* finished writing */
3333 {
3334 TPT(( 0, FIL__, __LINE__, _("msg=<File transfer - (wait).>\n")));
3335
3336 /* challenge is sent, now wait for message from client
3337 */
3338 conn->headcount = 0;
3339 conn->bytecount = 0;
3340 conn->bytes_to_send = 0;
3341 conn->bytes_to_get = 0;
3342 if (conn->buf != NULL)
3343 {
3344 SH_FREE(conn->buf);
3345 conn->buf = NULL;
3346 }
3347 conn->state = CONN_READING;
3348 }
3349 SL_RET0(_("check_protocol"));
3350 }
3351
3352 /* --------- message exchange -----------
3353 */
3354 if ((conn->head[0] & SH_PROTO_SRP) == 0 &&
3355 (conn->head[0] & SH_PROTO_MSG) != 0 /* is set */ )
3356 {
3357
3358 if (state == SH_DO_READ) /* finished reading */
3359 {
3360
3361 TPT(( 0, FIL__, __LINE__, _("msg=<Message transfer - entry.>\n")));
3362
3363 /* client requests challenge
3364 */
3365 if (0 == check_request_nerr ((char *)&(conn->head[3]), _("HELO")))
3366 {
3367
3368 TPT(( 0, FIL__, __LINE__,
3369 _("msg=<Message transfer - HELO (1).>\n")));
3370
3371 if (conn->buf == NULL || sl_strlen(conn->buf) <= KEY_LEN )
3372 {
3373 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_NOCLT);
3374 sh_forward_do_free (conn);
3375 SL_RET0(_("check_protocol"));
3376 }
3377
3378 TPT(( 0, FIL__, __LINE__, _("msg=<Rcvt %s.>\n"), conn->buf));
3379
3380 /* ---- search the register -----
3381 */
3382 this_client = search_register (conn, KEY_LEN);
3383 if (NULL == this_client)
3384 SL_RET0(_("check_protocol"));
3385
3386 /* ---- force authentication -----
3387 */
3388 if ( (this_client->session_key[0] == '\0') ||
3389 ((time(NULL)-this_client->session_key_timer)
3390 > (time_t) TIMEOUT_KEY)
3391 )
3392 {
3393
3394 /* fake an auth request and jump there
3395 */
3396 conn->head[0] = (conn->head[0] | SH_PROTO_SRP);
3397 conn->head[3] = 'S';
3398 conn->head[4] = 'A';
3399 conn->head[5] = 'L';
3400 conn->head[6] = 'T';
[12]3401 if (flag_err_info == SL_TRUE)
3402 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_FAUTH,
3403 &(conn->buf[KEY_LEN]));
[22]3404 len = sl_strlen(&(conn->buf[KEY_LEN])) + 1;
3405 /* &(conn->buf[KEY_LEN]) is hostname */
3406 /* may overlap, thus only memmove is correct */
3407 memmove(conn->buf, &(conn->buf[KEY_LEN]), len);
[1]3408 this_client->session_key[0] = '\0';
3409 this_client->session_key_timer = (time_t) 1;
3410
3411 goto servInit;
3412 }
3413
3414 /* check whether hostname is properly signed
3415 */
3416 if (conn->K != NULL)
3417 {
3418 SH_FREE(conn->K);
3419 conn->K = NULL;
3420 }
[34]3421 /* FIXME len = sl_strlen(&(conn->buf[KEY_LEN])) + KEY_LEN + 1; */
3422 conn->K = SH_ALLOC(KEY_LEN + 1);
[1]3423
3424 sl_strlcpy (conn->K,
3425 sh_util_siggen(this_client->session_key,
3426 &(conn->buf[KEY_LEN]),
[133]3427 sl_strlen(&(conn->buf[KEY_LEN])),
3428 sigbuf, sizeof(sigbuf)),
[1]3429 KEY_LEN+1);
3430 TPT((0, FIL__, __LINE__, _("msg=<host %s>\n"),
3431 &(conn->buf[KEY_LEN])));
3432 TPT((0, FIL__, __LINE__, _("msg=<ckey %s>\n"),
3433 this_client->session_key));
3434 TPT((0, FIL__, __LINE__, _("msg=<sign %s>\n"), conn->K));
3435
3436 if (0 != sl_strncmp(conn->K, conn->buf, KEY_LEN))
3437 {
3438 TPT(( 0, FIL__, __LINE__, _("msg=<Rcvt %s>\n"), conn->buf));
3439 TPT(( 0, FIL__, __LINE__, _("msg=<Want %s>\n"), conn->K));
3440 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_BADCONN,
3441 _("Signature mismatch"),
3442 &(conn->buf[KEY_LEN]));
3443
3444 this_client->session_key_timer =
3445 time(NULL) - (2*TIMEOUT_KEY);
3446
3447 sh_forward_do_free (conn);
3448 SL_RET0(_("check_protocol"));
3449 }
3450 SH_FREE(conn->K);
3451 conn->K = NULL;
3452
3453 /* -- create a nonce and send it --
3454 */
3455
3456 conn->client_entry = this_client;
3457 sl_strlcpy (conn->peer, &(conn->buf[KEY_LEN]), SH_MINIBUF+1);
3458
[137]3459 ticks = (UINT32) taus_get ();
3460
[1]3461 test = (char *) &ticks;
3462 sh_util_cpylong (conn->challenge, test, 4);
3463 conn->challenge[4] = '\0';
3464 for (i = 0; i < 4; ++i)
3465 if (conn->challenge[i] == '\0')
3466 conn->challenge[i] = 0x01;
3467
3468 sh_forward_prep_send (conn, conn->challenge, 5, _("TALK"),
3469 SH_PROTO_MSG);
3470 TPT(( 0, FIL__, __LINE__, _("msg=<Sent %s.>\n"),
3471 hu_trans(conn->challenge)));
3472 }
3473
3474 /* Client has send a message. Check whether we are in proper
3475 * state, and verify message.
3476 */
3477 else if (0 ==
3478 check_request_nerr((char *)&(conn->head[3]), _("MESG")) &&
3479 conn->client_entry != NULL &&
3480 conn->client_entry->session_key[0] != '\0' &&
3481 (len = sl_strlen(conn->buf) - KEY_LEN) > 0 &&
3482 sl_strlen(conn->challenge) == 4)
3483 {
3484 TPT(( 0, FIL__, __LINE__,
3485 _("msg=<Message transfer - MESG (3).>\n")));
3486
3487#ifdef SH_ENCRYPT
3488 if (conn->client_entry->encf_flag == 0) {
3489 conn->client_entry->ency_flag = 0;
3490 }
3491 if ((conn->client_entry->ency_flag != 0) &&
3492 ((conn->head[0] & SH_PROTO_ENC) == 0))
3493 {
3494 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_MISENC,
3495 _("message transfer"),
3496#ifdef SH_ENCRYPT_2
3497 _("version2"),
3498#else
3499 _("version1"),
3500#endif
3501 _("none"));
3502 /* conn->client_entry->ency_flag = 0; */
3503 }
3504 else if ((conn->client_entry->ency_flag != 0) &&
3505 ((conn->head[0] & SH_MASK_ENC) !=
3506 conn->client_entry->ency_flag))
3507 {
3508 sh_error_handle(SH_ERR_NOTICE, FIL__, __LINE__, 0,
3509 MSG_TCP_MISENC,
3510 _("message transfer"),
3511#ifdef SH_ENCRYPT_2
3512 _("version2"),
3513#else
3514 _("version1"),
3515#endif
3516 ((conn->head[0] & SH_PROTO_EN2) == SH_PROTO_EN2) ? _("version2") : _("version1"));
3517 conn->client_entry->ency_flag =
3518 (conn->head[0] & SH_MASK_ENC);
3519 }
3520#else
3521 if ((conn->head[0] & SH_PROTO_ENC) != 0)
3522 {
3523 sh_error_handle((-1), FIL__, __LINE__, 0,
3524 MSG_TCP_MISENC,
3525 _("message transfer"),
3526 _("none"),
3527 ((conn->head[0] & SH_PROTO_EN2) == SH_PROTO_EN2) ? _("version2") : _("version1"));
3528 }
3529#endif
3530
3531 TPT(( 0, FIL__, __LINE__, _("msg=<Rcvt %s.>\n"), conn->buf));
3532 /* get hash from message end, truncate message
3533 */
3534 sl_strlcpy(hash, &(conn->buf[len]), KEY_LEN+1);
3535 conn->buf[len] = '\0';
3536
3537 /* verify hash
3538 */
3539 buffer = sh_util_strconcat(conn->buf, conn->challenge, NULL);
3540 i = sl_strncmp(hash,
3541 sh_util_siggen(conn->client_entry->session_key,
3542 buffer,
[133]3543 sl_strlen(buffer),
3544 sigbuf, sizeof(sigbuf)),
[1]3545 KEY_LEN);
3546 TPT((0, FIL__, __LINE__, _("msg=<sign %s.>\n"),
3547 sh_util_siggen(conn->client_entry->session_key,
3548 buffer,
[133]3549 sl_strlen(buffer),
3550 sigbuf, sizeof(sigbuf))));
[1]3551
3552
3553 if (0 != i)
3554 {
3555 TPT((0, FIL__, __LINE__, _("msg=<update status>\n")));
3556 status_update (conn->client_entry, CLT_FAILED);
3557 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_BADCONN,
3558 _("Msg signature mismatch"), conn->peer);
3559 conn->client_entry->session_key_timer =
3560 time(NULL) - (2*TIMEOUT_KEY);
3561 sh_forward_do_free (conn);
3562 SL_RET0(_("check_protocol"));
3563 }
3564 else
3565 {
3566 conn->client_entry->last_connect = time (NULL);
3567
3568 if (NULL != sl_strstr(conn->buf, _("EXIT")))
3569 {
3570 TPT((0, FIL__, __LINE__, _("msg=<update status>\n")));
3571 conn->client_entry->exit_flag = 1;
3572 status_update (conn->client_entry, CLT_EXITED);
3573 }
3574 else if (NULL != sl_strstr(conn->buf, _("PANIC")))
3575 {
3576 TPT((0, FIL__, __LINE__, _("msg=<update status>\n")));
3577 status_update (conn->client_entry, CLT_PANIC);
3578 }
3579 else if (NULL != sl_strstr(conn->buf, _("SUSPEND")))
3580 {
3581 TPT((0, FIL__, __LINE__, _("msg=<update status>\n")));
3582 status_update (conn->client_entry, CLT_SUSPEND);
3583 }
3584 else if (NULL != sl_strstr(conn->buf, _("POLICY")))
3585 {
3586 TPT((0, FIL__, __LINE__, _("msg=<update status>\n")));
3587 status_update (conn->client_entry, CLT_POLICY);
3588 }
3589 else if (NULL != sl_strstr(conn->buf,
3590 _("File check completed")))
3591 {
3592 TPT((0, FIL__, __LINE__, _("msg=<update status>\n")));
3593 status_update (conn->client_entry, CLT_CHECK);
3594 }
3595 else if (NULL != sl_strstr(conn->buf, _("START")))
3596 {
3597 TPT((0, FIL__, __LINE__, _("msg=<update status>\n")));
3598 sh_socket_add2reload (conn->client_entry->hostname);
3599 if (conn->client_entry->status_now == CLT_SUSPEND) {
3600 status_update (conn->client_entry, CLT_ILLEGAL);
3601 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_ILL,
3602 conn->peer);
3603 }
3604 else
3605 status_update (conn->client_entry, CLT_STARTED);
3606 }
3607 else
3608 {
3609 TPT((0, FIL__, __LINE__, _("msg=<update status>\n")));
3610 if (0 != sl_strcmp(conn->buf,
3611 _("Runtime configuration reloaded")))
3612 {
3613 sh_socket_add2reload (conn->client_entry->hostname);
3614 }
3615 status_update (conn->client_entry, CLT_MSG);
3616 }
3617
3618 TPT((0, FIL__, __LINE__, _("msg=<status updated>\n")));
3619 clt_sev = atoi(conn->buf);
3620 clt_class = (-1);
3621 ptok = strchr(conn->buf, '?');
3622 if (ptok != NULL)
3623 {
3624 ++ptok;
3625 if (ptok != NULL && sh.flag.client_class == S_TRUE)
3626 clt_class = atoi(ptok); /* is a global */
3627 ptok = strchr(ptok, '?');
3628 if (ptok != NULL)
3629 ++ptok;
3630 }
3631 if (sh.flag.client_severity == S_FALSE)
3632 clt_sev = (-1);
3633
3634 /* here we expect an xml formatted message, thus we don't
3635 escape xml special chars (flag == 0) */
3636 ptok =
3637 sh_tools_safe_name ((ptok!=NULL) ? ptok : conn->buf, 0);
3638
3639 /* push client name to error routine
3640 */
3641 sh_error_set_peer(sh_strip_domain (conn->peer));
3642 sh_error_handle(clt_sev, FIL__, __LINE__, 0, MSG_TCP_MSG,
3643 sh_strip_domain (conn->peer),
3644 ptok);
3645 sh_error_set_peer(NULL);
3646
3647 TPT((0, FIL__, __LINE__, _("msg=<%s>\n"), ptok));
3648 SH_FREE(ptok);
3649 clt_class = (-1);
3650 }
3651 memset(buffer, '\0', sl_strlen(buffer));
3652 SH_FREE(buffer);
3653
3654 /* SERVER CONF SEND
3655 */
3656 buffer = sh_util_strconcat(conn->buf,
3657 conn->challenge,
3658 NULL);
3659 sl_strlcpy(hash,
3660 sh_util_siggen ( conn->client_entry->session_key,
3661 buffer,
[133]3662 sl_strlen(buffer),
3663 sigbuf, sizeof(sigbuf)),
[1]3664 KEY_LEN+1);
3665
3666 /* --- SERVER CMD --- */
3667 cmd = sh_socket_check (conn->peer);
3668
3669 if (cmd != NULL)
3670 {
3671 /* max cmd size is SH_MAXMSGLEN bytes
3672 */
3673 sl_strlcpy(&hash[KEY_LEN], cmd, SH_MAXMSGLEN);
3674 sl_strlcat(&hash[KEY_LEN],
3675 sh_util_siggen ( conn->client_entry->session_key,
3676 &hash[KEY_LEN],
[133]3677 sl_strlen(&hash[KEY_LEN]),
3678 sigbuf, sizeof(sigbuf)),
[1]3679 SH_MAXMSGLEN+KEY_LEN+1);
3680
3681 TPT((0, FIL__, __LINE__, _("CONF SEND <0> <%s>\n"),
3682 &hash[KEY_LEN]));
3683
3684 } else {
3685
3686 TPT((0, FIL__, __LINE__, _("CONF SEND <0> <[NULL]>\n")));
3687
3688 }
3689 /* --- SERVER CMD END --- */
3690
3691 TPT((0, FIL__, __LINE__, _("msg=<sign %s.>\n"),
3692 sh_util_siggen(conn->client_entry->session_key,
3693 buffer,
[133]3694 sl_strlen(buffer),
3695 sigbuf, sizeof(sigbuf))));
[1]3696
3697#ifdef SH_ENCRYPT
3698 sh_forward_prep_send_crypt (conn, hash,
3699 sl_strlen(hash) /* KEY_LEN */,
3700 _("CONF"),
3701 SH_PROTO_MSG|SH_PROTO_END|conn->client_entry->ency_flag);
3702#else
3703 sh_forward_prep_send_crypt (conn, hash,
3704 sl_strlen(hash) /* KEY_LEN */,
3705 _("CONF"),
3706 SH_PROTO_MSG|SH_PROTO_END);
3707#endif
3708
3709 memset(buffer, '\0', sl_strlen(buffer));
3710 SH_FREE(buffer);
3711
3712 /* sh_forward_do_free (conn); */
3713 }
3714
3715 /* client does something unexpected
3716 */
3717 else /* ---- ??? ----- */
3718 {
3719 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_FINV,
3720 2, conn->pass, conn->peer,
3721 '\\', conn->head[3], '\\',conn->head[4],
3722 '\\', conn->head[5], '\\',conn->head[6]);
3723 status_update (conn->client_entry, CLT_FAILED);
3724 conn->client_entry->session_key_timer =
3725 time(NULL) - (2*TIMEOUT_KEY);
3726 sh_forward_do_free (conn);
3727 }
3728 }
3729 else if (state == SH_DO_WRITE) /* finished writing */
3730 {
3731 if (0 != (conn->head[0] & SH_PROTO_END))
3732 {
[12]3733 if (flag_err_debug == SL_TRUE)
3734 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_OKMSG,
3735 sh_strip_domain (conn->peer));
[1]3736 sh_forward_do_free (conn);
3737 SL_RET0(_("check_protocol"));
3738 }
3739
3740 TPT(( 0, FIL__, __LINE__, _("msg=<Msg transfer - (wait).>\n")));
3741
3742 /* challenge is sent, now wait for message from client
3743 */
3744 conn->headcount = 0;
3745 conn->bytecount = 0;
3746 conn->bytes_to_send = 0;
3747 conn->bytes_to_get = 0;
3748 if (conn->buf != NULL)
3749 {
3750 SH_FREE(conn->buf);
3751 conn->buf = NULL;
3752 }
3753 conn->state = CONN_READING;
3754 }
3755 TPT((0, FIL__, __LINE__, _("msg=<return>\n") ));
3756 SL_RET0(_("check_protocol"));
3757 }
3758
3759 /* --------- authentication -----------
3760 */
3761
3762 /* entry point for jump from message forward if session key must
3763 * be re-initialized
3764 */
3765 servInit:
3766
3767 if ( (conn->head[0] & SH_PROTO_SRP) != 0 /* is set */ )
3768 {
3769
3770#ifndef USE_SRP_PROTOCOL
3771
3772 if (state == SH_DO_READ) /* finished reading */
3773 {
3774 TPT((0, FIL__, __LINE__, _("msg=<Authentication - entry.>\n")));
3775
3776 /* first pass -- client request salt
3777 */
3778 if (conn->pass == 1)
3779 {
3780
3781 TPT((0, FIL__, __LINE__,
3782 _("msg=<Authentication - SALT (1).>\n")));
3783
3784 if (conn->buf == NULL || sl_strlen(conn->buf) == 0)
3785 {
3786 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_NOCLT);
3787 sh_forward_do_free (conn);
3788 SL_RET0(_("check_protocol"));
3789 }
3790
3791
3792 /* search the register
3793 */
3794
3795 this_client = search_register (conn, 0);
3796 if (NULL == this_client)
3797 SL_RET0(_("check_protocol"));
3798
3799
3800 conn->client_entry = this_client;
3801 sl_strlcpy (conn->peer, conn->buf, SH_MINIBUF+1);
3802
3803 if (0 != check_request_s((char *)&(conn->head[3]),
3804 _("SALT"),conn->peer))
3805 {
3806 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_BADCONN,
3807 _("No salt requested"), conn->peer);
3808 status_update (conn->client_entry, CLT_FAILED);
3809 conn->client_entry->session_key_timer =
3810 time(NULL) - (2*TIMEOUT_KEY);
3811 sh_forward_do_free (conn);
3812 SL_RET0(_("check_protocol"));
3813 }
3814
3815
3816 /* -- create server nounce v --
3817 */
[137]3818 ticks = (UINT32) taus_get ();
[1]3819
3820 if (conn->A != NULL)
3821 {
3822 SH_FREE(conn->A);
3823 conn->A = NULL;
3824 }
3825 conn->A = SH_ALLOC(KEY_LEN+1);
3826
3827 sl_strlcpy(conn->A,
3828 sh_tiger_hash((char *) &ticks,
[133]3829 TIGER_DATA, sizeof(UINT32),
3830 hashbuf, sizeof(hashbuf)),
[1]3831 KEY_LEN+1);
3832 u[0] = 'I'; u[1] = 'N'; u[2] = 'I'; u[3] = 'T'; u[4] = '\0';
3833
3834 if (conn->M1 != NULL)
3835 {
3836 SH_FREE(conn->M1);
3837 conn->M1 = NULL;
3838 }
3839 conn->M1 = SH_ALLOC(2*KEY_LEN+1);
3840
3841 /* compute hash key H(v(server), P)v(server)
3842 */
3843 sh_passwd (conn->A, conn->client_entry->verifier,
3844 NULL, conn->M1);
3845
3846 sl_strlcat(conn->M1, conn->A, 2*KEY_LEN+1);
3847
3848
3849 /* --- send H(v(server), P)v(server) ----
3850 */
3851 sh_forward_prep_send (conn,
3852 conn->M1,
3853 sl_strlen(conn->M1),
3854 u,
3855 (conn->head[0]|SH_PROTO_SRP));
3856
3857 SH_FREE(conn->M1);
3858 conn->M1 = NULL;
3859 }
3860
3861 /* client -- third pass
3862 * Message is H(H(u,v),P)u
3863 *
3864 * A := v, verifier := H(password),
3865 */
3866 else if (conn->pass == 3 &&
3867 conn->client_entry != NULL)
3868 {
3869
3870 TPT((0, FIL__, __LINE__,
3871 _("msg=<Authentication - PASS (3).>\n")));
3872
3873 if (0 != check_request_s((char *) &(conn->head[3]), _("PASS"),
3874 conn->peer) ||
3875 sl_strlen(conn->buf) <= KEY_LEN ||
3876 conn->A == NULL)
3877 {
3878 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_BADCONN,
3879 _("Invalid client request"), conn->peer);
3880 status_update (conn->client_entry, CLT_FAILED);
3881 conn->client_entry->session_key_timer =
3882 time(NULL) - (2*TIMEOUT_KEY);
3883 sh_forward_do_free (conn);
3884 SL_RET0(_("check_protocol"));
3885 }
3886
3887 /* store random nonce u from client
3888 */
3889 if (conn->K != NULL)
3890 {
3891 SH_FREE(conn->K);
3892 conn->K = NULL;
3893 }
3894 conn->K = SH_ALLOC(KEY_LEN+1);
3895 sl_strlcpy(conn->K, &(conn->buf[KEY_LEN]), KEY_LEN+1);
3896
3897 /* verify random nonce u from client
3898 */
3899 if (conn->M1 != NULL)
3900 {
3901 SH_FREE(conn->M1);
3902 conn->M1 = NULL;
3903 }
3904 conn->M1 = sh_util_strconcat(conn->K, conn->A, NULL);
3905
3906 TPT((0, FIL__, __LINE__, _("msg=<c/r: K = %s>\n"), conn->K));
3907 TPT((0, FIL__, __LINE__, _("msg=<c/r: A = %s>\n"), conn->A));
3908 TPT((0, FIL__, __LINE__, _("msg=<c/r: M = %s>\n"), conn->M1));
3909
3910 sl_strlcpy(hash, sh_tiger_hash (conn->M1,
3911 TIGER_DATA,
[133]3912 sl_strlen(conn->M1),
3913 hashbuf, sizeof(hashbuf)),
3914 KEY_LEN+1);
[1]3915 sh_passwd (hash, conn->client_entry->verifier, NULL, conn->M1);
3916
3917 TPT((0, FIL__, __LINE__, _("msg=<c/r: H = %s>\n"), hash));
3918 TPT((0, FIL__, __LINE__, _("msg=<c/r: P = %s>\n"), conn->M1));
3919
3920 if ( 0 != sl_strncmp(conn->M1, conn->buf, KEY_LEN))
3921 {
3922 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_BADCONN,
3923 _("Session key mismatch"), conn->peer);
3924 status_update (conn->client_entry, CLT_FAILED);
3925 conn->client_entry->session_key_timer =
3926 time(NULL) - (2*TIMEOUT_KEY);
3927 sh_forward_do_free (conn);
3928 SL_RET0(_("check_protocol"));
3929 }
3930
3931
3932 /* ---- compute hash key H(v, P, u) ----
3933 */
3934
3935 sh_passwd (conn->A, conn->client_entry->verifier, conn->K,
3936 conn->M1);
3937
3938 sl_strlcpy(conn->client_entry->session_key,
3939 conn->M1, KEY_LEN+1);
3940 TPT((0, FIL__, __LINE__, _("msg=<c/r: Key = %s>\n"),
3941 conn->client_entry->session_key));
3942
3943#ifdef SH_ENCRYPT
3944 err_num = makeKey(&(conn->client_entry->keyInstE),
3945 DIR_ENCRYPT, 192,
3946 conn->client_entry->session_key);
3947 if (err_num < 0)
3948 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
[132]3949 errorExplain(err_num, expbuf, sizeof(expbuf)),
[1]3950 _("check_protocol: makeKey"));
3951 err_num = makeKey(&(conn->client_entry->keyInstD),
3952 DIR_DECRYPT, 192,
3953 conn->client_entry->session_key);
3954 if (err_num < 0)
3955 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
[132]3956 errorExplain(err_num, expbuf, sizeof(expbuf)),
[1]3957 _("check_protocol: makeKey"));
3958#endif
3959
3960 if (conn->K != NULL) SH_FREE (conn->K);
3961 conn->K = NULL;
3962 if (conn->A != NULL) SH_FREE (conn->A);
3963 conn->A = NULL;
3964 if (conn->M1 != NULL) SH_FREE (conn->M1);
3965 conn->M1 = NULL;
3966
3967 /* if (conn->client_entry->status_now == CLT_STARTED */
3968 if (((conn->client_entry->status_now != CLT_INACTIVE) &&
3969 (conn->client_entry->status_now != CLT_EXITED) &&
3970 (conn->client_entry->status_now != CLT_SUSPEND))
3971 && conn->client_entry->session_key_timer > (time_t) 1)
3972 {
3973 status_update (conn->client_entry, CLT_ILLEGAL);
3974 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_ILL,
3975 conn->peer);
3976 }
3977 else if (conn->client_entry->session_key_timer == (time_t) 0)
3978 {
3979 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_NEW,
3980 conn->peer);
3981 if (conn->client_entry->status_now != CLT_SUSPEND)
3982 status_update (conn->client_entry, CLT_STARTED);
3983 }
3984
3985 conn->client_entry->session_key_timer = time (NULL);
3986 conn->client_entry->last_connect = time (NULL);
3987
3988 /* put in read state
3989 */
3990 sh_forward_prep_send (conn,
3991 _("AUTH"),
3992 5,
3993 _("AUTH"),
3994 (conn->head[0]|SH_PROTO_SRP));
3995
3996 }
3997 else
3998 {
3999 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_FINV,
4000 3, conn->pass, conn->peer,
4001 '\\', conn->head[3], '\\', conn->head[4],
4002 '\\', conn->head[5], '\\', conn->head[6]);
4003 sh_forward_do_free (conn);
4004 }
4005 }
4006
4007#else
4008 /* use SRP */
4009
4010
4011 if (state == SH_DO_READ) /* finished reading */
4012 {
4013
4014 TPT((0, FIL__, __LINE__, _("msg=<Authentication - entry.>\n")));
4015
4016 /* first pass -- client request salt
4017 */
4018 if (conn->pass == 1)
4019 {
4020 TPT((0, FIL__, __LINE__,
4021 _("msg=<Authentication - SALT (1).>\n")));
4022
4023 if (conn->buf == NULL)
4024 {
4025 sh_error_handle( (-1), FIL__, __LINE__, 0, MSG_TCP_NOCLT);
4026 sh_forward_do_free (conn);
4027 SL_RET0(_("check_protocol"));
4028 }
4029
4030 /* search the register
4031 */
4032 this_client = search_register(conn, 0);
4033 if (NULL == this_client)
4034 SL_RET0(_("check_protocol"));
4035
4036 conn->client_entry = this_client;
4037 sl_strlcpy (conn->peer, conn->buf, SH_MINIBUF+1);
4038
4039 if (0 != check_request_s((char *)&(conn->head[3]), _("SALT"),
4040 conn->peer))
4041 {
4042 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_BADCONN,
4043 _("No salt requested"), conn->peer);
4044 status_update (conn->client_entry, CLT_FAILED);
4045 conn->client_entry->session_key_timer =
4046 time(NULL) - (2*TIMEOUT_KEY);
4047 sh_forward_do_free (conn);
4048 SL_RET0(_("check_protocol"));
4049 }
4050
4051
4052 u[0] = 'I'; u[1] = 'N'; u[2] = 'I'; u[3] = 'T'; u[4] = '\0';
4053
4054 sh_forward_prep_send (conn,
4055 conn->client_entry->salt,
4056 sl_strlen(conn->client_entry->salt),
4057 u,
4058 (conn->head[0]|SH_PROTO_SRP));
4059 }
4060
4061 /* client has sent A -- third pass
4062 */
4063 else if (conn->pass == 3 &&
4064 conn->client_entry != NULL)
4065 {
4066
4067 TPT((0, FIL__, __LINE__,
4068 _("msg=<Authentication - PC01 (3).>\n")));
4069
4070 if (0 != check_request_s((char *)&(conn->head[3]),_("PC01"),conn->peer)||
4071 conn->buf == NULL
4072 )
4073 {
4074 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_BADCONN,
4075 _("Invalid client request"), conn->peer);
4076 status_update (conn->client_entry, CLT_FAILED);
4077 conn->client_entry->session_key_timer =
4078 time(NULL) - (2*TIMEOUT_KEY);
4079 sh_forward_do_free (conn);
4080 SL_RET0(_("check_protocol"));
4081 }
4082
4083 if (0 != sh_srp_init())
4084 {
4085 status_update (conn->client_entry, CLT_FAILED);
4086 sh_error_handle(SH_ERR_SEVERE, FIL__, __LINE__, 0,
4087 MSG_TCP_EBGN);
4088 sh_forward_do_free (conn);
4089 SL_RET0(_("check_protocol"));
4090 }
4091
4092
4093 /* check A, only send B if correct
4094 */
4095 if ( sl_strlen(conn->buf) < SH_BUFSIZE &&
4096 0 == sh_srp_check_zero (conn->buf) )
4097 {
4098 len = sl_strlen(conn->buf)+1;
4099
4100 if (conn->A != NULL)
4101 {
4102 SH_FREE(conn->A);
4103 conn->A = NULL;
4104 }
4105 conn->A = SH_ALLOC(len);
4106 sl_strlcpy (conn->A, conn->buf, len);
4107
4108 /*
4109 * compute B
4110 */
4111 if (0 != sh_srp_make_a ()) /* b random number */
4112 {
4113 status_update (conn->client_entry, CLT_FAILED);
4114
4115 sh_error_handle(SH_ERR_SEVERE, FIL__, __LINE__, 0,
4116 MSG_TCP_EBGN);
4117 sh_srp_exit();
4118 sh_forward_do_free (conn);
4119 SL_RET0(_("check_protocol"));
4120 }
4121
4122 foo_B = sh_srp_B /* B = v + g^b */
4123 (conn->client_entry->verifier);
4124
4125 if (foo_B == NULL)
4126 {
4127 status_update (conn->client_entry, CLT_FAILED);
4128
4129 sh_error_handle(SH_ERR_SEVERE, FIL__, __LINE__, 0,
4130 MSG_TCP_EBGN);
4131 sh_srp_exit();
4132 sh_forward_do_free (conn);
4133 SL_RET0(_("check_protocol"));
4134 }
4135
4136 TPT((0, FIL__, __LINE__, _("msg=<srp: A = %s>\n"), conn->A));
4137 TPT((0, FIL__, __LINE__, _("msg=<srp: B = %s>\n"), foo_B));
4138
4139 /*
4140 * create nonce u
4141 */
[137]4142 ticks = (UINT32) taus_get ();
4143
[1]4144 test = (char *) &ticks;
4145 sh_util_cpylong (u, test, 4); /* u nounce */
4146 u[4] = '\0';
4147 sl_strlcpy(conn->challenge,
[133]4148 sh_tiger_hash(u, TIGER_DATA, 4, hashbuf, sizeof(hashbuf)),
[1]4149 SH_CHALLENGE_SIZE);
4150
4151 TPT((0, FIL__, __LINE__, _("msg=<srp: u = %03o-%03o-%03o-%03o>\n"), u[0], u[1], u[2], u[3]));
4152 TPT((0, FIL__, __LINE__, _("msg=<srp: U = %s>\n"),
4153 conn->challenge));
4154
4155 /*
4156 * compute the session key K and M1 = Hash(A,B,K)
4157 */
4158 foo_Ss = sh_srp_S_s (conn->challenge,
4159 conn->A,
4160 conn->client_entry->verifier);
[225]4161
4162 if (foo_Ss == NULL || 0 != sh_srp_check_zero (foo_Ss))
[1]4163 {
4164 status_update (conn->client_entry, CLT_FAILED);
4165
4166 sh_error_handle(SH_ERR_SEVERE, FIL__, __LINE__, 0,
4167 MSG_TCP_EBGN);
4168 sh_srp_exit();
4169 sh_forward_do_free (conn);
4170 SL_RET0(_("check_protocol"));
4171 }
4172
4173 if (conn->K != NULL)
4174 {
4175 SH_FREE(conn->K);
4176 conn->K = NULL;
4177 }
4178 conn->K = SH_ALLOC(KEY_LEN+1);
4179 sl_strlcpy(conn->K,
4180 sh_tiger_hash(foo_Ss, TIGER_DATA,
[133]4181 sl_strlen(foo_Ss),
4182 hashbuf, sizeof(hashbuf)),
[1]4183 KEY_LEN+1);
4184
4185 if (conn->M1 != NULL)
4186 {
4187 SH_FREE(conn->M1);
4188 conn->M1 = NULL;
4189 }
4190 conn->M1 = SH_ALLOC(KEY_LEN+1);
[133]4191 sh_srp_M (conn->A, foo_B, conn->K, conn->M1, KEY_LEN+1);
[1]4192
4193 TPT((0, FIL__, __LINE__, _("msg=<srp:Ss = %s>\n"), foo_Ss));
4194 TPT((0, FIL__, __LINE__, _("msg=<srp: K = %s>\n"), conn->K));
4195 TPT((0, FIL__, __LINE__, _("msg=<srp:M1 = %s>\n"),conn->M1));
4196
4197 /*
4198 * send B
4199 */
4200 sh_forward_prep_send (conn,
4201 foo_B,
4202 sl_strlen(foo_B)+1,
4203 u,
4204 (conn->head[0]|SH_PROTO_SRP));
4205 if (foo_Ss != NULL)
4206 {
4207 SH_FREE(foo_Ss);
4208 foo_Ss = NULL;
4209 }
4210 if (foo_B != NULL)
4211 {
4212 SH_FREE(foo_B);
4213 foo_B = NULL;
4214 }
4215 }
4216 else
4217 {
4218 status_update (conn->client_entry, CLT_FAILED);
4219
4220 sh_error_handle(SH_ERR_SEVERE, FIL__, __LINE__, 0,
4221 MSG_TCP_EZERO);
4222 sh_forward_do_free (conn);
4223 }
4224
4225 sh_srp_exit();
4226 }
4227
4228 /* client has sent M1 -- fifth pass
4229 */
4230 else if (conn->pass == 5 &&
4231 conn->client_entry != NULL)
4232 {
4233 TPT((0, FIL__, __LINE__,
4234 _("msg=<Authentication - PC02 (5).>\n")));
4235
4236 /* check that the state is valid
4237 */
4238 if (0 != check_request_s((char *)&(conn->head[3]), _("PC02"),
4239 conn->peer) ||
4240 conn->A == NULL || conn->K == NULL || conn->M1 == NULL)
4241 {
4242 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_BADCONN,
4243 _("Invalid client request"), conn->peer);
4244 status_update (conn->client_entry, CLT_FAILED);
4245 conn->client_entry->session_key_timer =
4246 time(NULL) - (2*TIMEOUT_KEY);
4247 sh_forward_do_free (conn);
4248 SL_RET0(_("check_protocol"));
4249 }
4250
4251 /* ------ verify M1 = H(A, B, K) -------
4252 * ----- send M2 = H(A, M1, K) -------
4253 */
4254 if (conn->buf != NULL &&
4255 sl_strncmp(conn->buf, conn->M1, KEY_LEN) == 0)
4256 {
4257 /*
4258 * send M2
4259 */
[133]4260 char M_buf[KEY_LEN+1];
[1]4261 sh_forward_prep_send (conn,
[133]4262 sh_srp_M (conn->A, conn->M1, conn->K,
4263 M_buf, sizeof(M_buf)),
[1]4264 KEY_LEN+1,
4265 _("PARP"),
4266 (conn->head[0]|SH_PROTO_SRP));
4267
4268 if (conn->A != NULL) SH_FREE(conn->A); conn->A = NULL;
4269 if (conn->M1 != NULL) SH_FREE(conn->M1); conn->M1 = NULL;
4270 sl_strlcpy(conn->client_entry->session_key,
4271 conn->K, KEY_LEN+1);
4272 TPT((0, FIL__, __LINE__, _("msg=<key %s>\n"),
4273 conn->client_entry->session_key));
4274
4275#ifdef SH_ENCRYPT
4276 err_num = makeKey(&(conn->client_entry->keyInstE),
4277 DIR_ENCRYPT, 192,
4278 conn->client_entry->session_key);
4279 if (err_num < 0)
4280 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
[132]4281 errorExplain(err_num, expbuf, sizeof(expbuf)),
[1]4282 _("sh_forward_prep_send_int: makeKey"));
4283 err_num = makeKey(&(conn->client_entry->keyInstD),
4284 DIR_DECRYPT, 192,
4285 conn->client_entry->session_key);
4286 if (err_num < 0)
4287 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
[132]4288 errorExplain(err_num, expbuf, sizeof(expbuf)),
[1]4289 _("sh_forward_prep_send_int: makeKey"));
4290#endif
4291
4292 if (conn->K != NULL) SH_FREE(conn->K); conn->K = NULL;
4293
4294 conn->client_entry->last_connect = time (NULL);
4295
4296 if (((conn->client_entry->status_now != CLT_INACTIVE) &&
4297 (conn->client_entry->status_now != CLT_EXITED) &&
4298 (conn->client_entry->status_now != CLT_SUSPEND))
4299 && conn->client_entry->session_key_timer > (time_t) 1)
4300 {
4301 status_update (conn->client_entry, CLT_ILLEGAL);
4302
4303 sh_error_handle((-1), FIL__, __LINE__, 0,
4304 MSG_TCP_ILL,
4305 conn->peer);
4306 }
4307 else if (conn->client_entry->session_key_timer == (time_t) 0)
4308 {
4309 sh_error_handle((-1), FIL__, __LINE__, 0,
4310 MSG_TCP_NEW,
4311 conn->peer);
4312 if (conn->client_entry->status_now != CLT_SUSPEND)
4313 status_update (conn->client_entry, CLT_STARTED);
4314 }
4315 conn->client_entry->session_key_timer = time (NULL);
4316
4317 }
4318 else
4319 {
4320 status_update (conn->client_entry, CLT_FAILED);
4321 conn->client_entry->session_key_timer =
4322 time(NULL) - (2*TIMEOUT_KEY);
4323
4324 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_BADCONN,
4325 _("Session key mismatch"), conn->peer);
4326 sh_forward_do_free (conn);
4327 }
4328 }
4329
4330 else
4331 {
4332 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_FINV,
4333 4, conn->pass, conn->peer,
4334 '\\', conn->head[3], '\\', conn->head[4],
4335 '\\', conn->head[5], '\\', conn->head[6]);
4336 sh_forward_do_free (conn);
4337 }
4338 }
4339
4340#endif
4341
4342 else if (state == SH_DO_WRITE) /* finished writing */
4343 {
4344 TPT((0, FIL__, __LINE__, _("msg=<Authentication -- (wait).>\n")));
4345
4346 conn->headcount = 0;
4347 conn->bytecount = 0;
4348 conn->bytes_to_send = 0;
4349 conn->bytes_to_get = 0;
4350 if (conn->buf != NULL)
4351 {
4352 SH_FREE(conn->buf);
4353 conn->buf = NULL;
4354 }
4355 conn->state = CONN_READING;
4356 }
4357 }
4358 SL_RET0(_("check_protocol"));
4359}
4360
4361
4362/***********************************************************
4363 *
4364 * SERVER RECEIVE FUNCTION
4365 *
4366 ***********************************************************
4367 */
4368int sh_forward_do_read (sh_conn_t * conn)
4369{
4370 unsigned long byteread; /* bytes read */
4371
4372#ifdef SH_ENCRYPT
4373
4374 unsigned long blkfac = 0;
4375 /* unsigned long length2; */
4376 char * p = NULL, * q = NULL;
4377 RIJ_BYTE inBlock[B_SIZ];
4378 RIJ_BYTE outBlock[B_SIZ];
4379 unsigned int j;
4380 cipherInstance cipherInst;
4381 int err_num;
[132]4382 char expbuf[SH_ERRBUF_SIZE];
[1]4383#endif
4384
4385 SL_ENTER(_("sh_forward_do_read"));
4386
4387 if (conn->state == CONN_SENDING)
4388 {
4389 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_SYNC,
4390 conn->peer);
4391 SL_RETURN( (-1), _("sh_forward_do_read"));
4392 }
4393
4394 if (conn->headcount < SH_HEADER_SIZE)
4395 {
4396 conn->bytes_to_get = SH_HEADER_SIZE - conn->headcount;
4397 byteread = read (conn->fd, &(conn->head[conn->headcount]),
4398 conn->bytes_to_get);
4399 if (byteread > 0 || errno == EINTR)
4400 {
4401 if (byteread > 0)
4402 conn->headcount += byteread;
4403 if (conn->headcount == SH_HEADER_SIZE)
4404 {
4405 conn->bytes_to_get =
4406 (256 * (unsigned int)conn->head[1] +
4407 (unsigned int)conn->head[2]);
4408 SH_SHOWPROT(conn->head, '<');
4409 conn->bytecount = 0;
4410 }
4411 }
4412 else
4413 {
4414 goto conn_reset;
4415 }
4416 SL_RETURN( (0), _("sh_forward_do_read"));
4417 }
4418
4419
4420 /* limit message size
4421 */
4422 /*
4423 conn->bytes_to_get =
4424 (conn->bytes_to_get > (16*SH_BUFSIZE - 1)) ?
4425 (16*SH_BUFSIZE - 1) : conn->bytes_to_get;
4426 */
4427 conn->bytes_to_get = (conn->bytes_to_get > TRANS_BYTES) ?
4428 TRANS_BYTES : conn->bytes_to_get;
4429
4430 if (conn->headcount == SH_HEADER_SIZE && conn->bytes_to_get > 0)
4431 {
4432 if ((conn->bytecount > 0) && (conn->bytes_to_get > conn->bytecount))
4433 {
4434 /* do nothing */;
4435 }
4436 else
4437 {
4438 if (conn->buf != NULL)
4439 SH_FREE (conn->buf);
[34]4440 conn->buf = SH_ALLOC(conn->bytes_to_get + 1); /* <= TRANS_BYTES+1 */
[1]4441 conn->bytecount = 0;
4442 }
4443
4444 byteread = read (conn->fd, &(conn->buf[conn->bytecount]),
4445 conn->bytes_to_get - conn->bytecount);
4446 if (byteread > 0 || errno == EINTR)
4447 {
4448 if (byteread > 0)
4449 conn->bytecount += byteread;
4450 if (conn->bytecount == conn->bytes_to_get)
4451 {
4452 ++conn->pass;
4453 /* always terminate with NULL - we might use sl_strcmp()
4454 */
4455 conn->buf[conn->bytecount] = '\0';
4456 conn->state = CONN_PAUSE;
4457
4458#ifdef SH_ENCRYPT
4459 if ((conn->head[0] & SH_PROTO_EN2) != 0) /* if encrypted */
4460 {
4461 conn->buf =
4462 sh_tools_revertPack (conn->head, conn->buf,
4463 &(conn->client_entry->keyInstD),
4464 conn->bytecount);
4465 }
4466 else if ((conn->head[0] & SH_PROTO_ENC) != 0) /* if encrypted */
4467 {
4468 /* Decrypt only complete blocks.
4469 * If there is an incomplete block,
4470 * something is wrong anyway.
4471 * Decrypt in place.
4472 */
4473 blkfac = conn->bytecount / B_SIZ;
4474 /* length2 = (B_SIZ * blkfac); */
4475 p = conn->buf;
4476 q = conn->buf;
4477
4478 err_num = cipherInit (&cipherInst, MODE_CBC, NULL);
4479 if (err_num < 0)
4480 sh_error_handle((-1), FIL__, __LINE__, -1, MSG_E_SUBGEN,
[132]4481 errorExplain(err_num, expbuf, sizeof(expbuf)),
[1]4482 _("sh_forward_do_read: cipherInit"));
4483
4484 for (j = 0; j < blkfac; ++j)
4485 {
4486 memcpy(inBlock, p, B_SIZ);
4487 err_num = blockDecrypt(&cipherInst,
4488 &(conn->client_entry->keyInstD),
4489 inBlock, 128 * BNUM, outBlock);
4490 if (err_num < 0)
4491 sh_error_handle((-1), FIL__, __LINE__, -1,
4492 MSG_E_SUBGEN,
[132]4493 errorExplain(err_num, expbuf, sizeof(expbuf)),
[1]4494 _("sh_forward_do_read: blockDecrypt"));
4495 memcpy(q, outBlock, B_SIZ);
4496 p += 16;
4497 q += 16;
4498 }
4499 }
4500#endif
4501
4502 /* ------ HERE CALL check_protocol(conn) ------- */
4503 check_protocol(conn, SH_DO_READ);
4504 }
4505 }
4506 else
4507 {
4508 goto conn_reset;
4509 }
4510 }
4511
4512 else if (conn->headcount == SH_HEADER_SIZE && conn->bytes_to_get == 0)
4513 {
4514 if (conn->buf != NULL)
4515 SH_FREE (conn->buf);
4516 conn->buf = NULL;
4517 conn->bytecount = 0;
4518 ++conn->pass;
4519 conn->state = CONN_PAUSE;
4520 /* fprintf(stderr, "\n**** FIXME null read ****\n\n"); */
4521 /* ------ HERE CALL check_protocol(conn) ------- */
4522 check_protocol(conn, SH_DO_READ);
4523 }
4524
4525 SL_RETURN( (0), _("sh_forward_do_read"));
4526
4527 conn_reset:
4528 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_RESET,
4529 conn->peer);
4530 sh_forward_do_free ( conn );
4531 SL_RETURN( (-1), _("sh_forward_do_read"));
4532}
4533
4534#if !defined(O_NONBLOCK)
4535#if defined(O_NDELAY)
4536#define O_NONBLOCK O_NDELAY
4537#else
4538#define O_NONBLOCK 0
4539#endif
4540#endif
4541
4542/* send to the client
4543 */
4544int sh_forward_do_write (sh_conn_t * conn)
4545{
4546 int flags;
4547 long arg = 0;
4548 long bytesent; /* bytes read */
4549
4550 SL_ENTER(_("sh_forward_do_write"));
4551
4552 /* ---- consistency check ------
4553 */
4554 if (conn->state == CONN_READING)
4555 {
4556 sh_error_handle( (-1), FIL__, __LINE__, 0, MSG_TCP_SYNC,
4557 conn->peer);
4558 SL_RETURN( (-1), _("sh_forward_do_write"));
4559 }
4560
4561
4562 flags = retry_fcntl (FIL__, __LINE__, conn->fd, F_GETFL, arg);
4563 retry_fcntl (FIL__, __LINE__, conn->fd, F_SETFL, flags|O_NONBLOCK);
4564
4565 /* ---- send the header ------
4566 */
4567 if (conn->headcount < SH_HEADER_SIZE)
4568 {
4569 conn->bytes_to_send = SH_HEADER_SIZE - conn->headcount;
4570 bytesent = write (conn->fd,
4571 &(conn->head[conn->headcount]),
4572 conn->bytes_to_send);
4573 if (bytesent >= 0 || errno == EINTR || errno == EAGAIN)
4574 {
4575 if (bytesent > 0)
4576 conn->headcount += bytesent;
4577 if (conn->headcount == SH_HEADER_SIZE)
4578 {
4579 conn->bytes_to_send =
4580 (256 * (int)conn->head[1] + (int)conn->head[2]);
4581 }
4582 }
4583 else
4584 {
4585 goto conn_reset_w;
4586 }
4587 if (conn->fd >= 0)
4588 retry_fcntl (FIL__, __LINE__, conn->fd, F_SETFL, flags);
4589 SL_RETURN( (0), _("sh_forward_do_write"));
4590 }
4591
4592
4593 /* ---- send the body ------
4594 */
4595
4596 if (conn->headcount == SH_HEADER_SIZE && conn->bytes_to_send > 0 &&
4597 conn->buf != NULL)
4598 {
4599 bytesent = write (conn->fd, &(conn->buf[conn->bytecount]),
4600 conn->bytes_to_send - conn->bytecount);
4601 if (bytesent >= 0 || errno == EINTR || errno == EAGAIN)
4602 {
4603 if (bytesent > 0)
4604 conn->bytecount += bytesent;
4605 if (conn->bytecount == conn->bytes_to_send)
4606 {
4607 ++conn->pass;
4608 conn->state = CONN_PAUSE;
4609 /* ------ HERE CALL check_protocol(conn) ------- */
4610 check_protocol(conn, SH_DO_WRITE);
4611 }
4612 }
4613 else
4614 {
4615 goto conn_reset_w;
4616 }
4617 }
4618
4619 else if (conn->headcount == SH_HEADER_SIZE && conn->bytes_to_send == 0)
4620 {
4621 ++conn->pass;
4622 conn->state = CONN_PAUSE;
4623 /* fprintf(stderr, "\n**** FIXME null write ****\n\n"); */
4624 /* ------ HERE CALL check_protocol(conn) ------- */
4625 check_protocol(conn, SH_DO_WRITE);
4626 }
4627
4628 if (conn->fd >= 0)
4629 retry_fcntl (FIL__, __LINE__, conn->fd, F_SETFL, flags);
4630 SL_RETURN( (0), _("sh_forward_do_write"));
4631
4632 conn_reset_w:
4633 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_RESET,
4634 conn->peer);
4635 sh_forward_do_free ( conn );
4636 SL_RETURN( (-1), _("sh_forward_do_write"));
4637}
4638
4639/* accept a connection from a client
4640 */
4641#include <syslog.h>
4642#ifdef SH_USE_LIBWRAP
4643#include <tcpd.h>
4644
4645#ifndef ALLOW_SEVERITY
4646#define ALLOW_SEVERITY LOG_INFO
4647#define DENY_SEVERITY LOG_WARNING
4648#endif
4649
4650int allow_severity;
4651int deny_severity;
4652#endif
4653
4654int sh_forward_accept (int sock, sh_conn_t * newconn)
4655{
4656 int errflag;
4657 int rc;
4658 struct sockaddr_in addr;
4659#ifdef SH_USE_LIBWRAP
4660 struct request_info request;
4661 char errbuf[128];
4662 char daemon[128];
4663#endif
4664
4665 /* handle AIX (size_t addrlen) in wrapper
4666 */
4667 int addrlen = sizeof(addr);
4668
4669 SL_ENTER(_("sh_forward_accept"));
4670
4671 rc = retry_accept(FIL__, __LINE__, sock,
4672 (struct sockaddr *) &addr, &addrlen);
4673
4674 if (rc >= 0)
4675 {
4676
4677 if (addrlen == 0)
4678 {
4679 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_E_SUBGEN,
4680 _("Connecting entity unknown"), _("accept"));
4681 newconn->fd = -1;
4682 newconn->state = CONN_FREE;
4683 close(rc);
4684 SL_RETURN( (-1), _("sh_forward_accept"));
4685 }
4686
4687#ifdef SH_USE_LIBWRAP
4688 sl_strlcpy(daemon, SH_INSTALL_NAME, 128);
4689 request_init(&request, RQ_DAEMON, daemon, RQ_FILE, rc, 0);
4690 fromhost(&request);
4691 if (!hosts_access(&request))
4692 {
4693 sl_strlcpy(errbuf, _("Refused connection from "), 128);
4694 sl_strlcat(errbuf, eval_client(&request), 128);
4695
4696 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_E_SUBGEN,
4697 errbuf, _("libwrap"));
4698 newconn->fd = -1;
4699 newconn->state = CONN_FREE;
4700 close(rc);
4701 SL_RETURN( (-1), _("sh_forward_accept"));
4702 }
4703#endif
4704
4705 memcpy (&(newconn->addr_peer), &addr, sizeof(struct sockaddr_in));
4706
4707 /* prepare for usage of connection
4708 */
4709 (void) retry_fcntl( FIL__, __LINE__, rc, F_SETFD, 1 );
4710 newconn->fd = rc;
4711 newconn->state = CONN_READING;
4712 newconn->timer = (unsigned long) time (NULL);
4713
[12]4714 if (flag_err_info == SL_TRUE)
4715 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_CNEW, newconn->fd);
[1]4716
4717 SL_RETURN( (0), _("sh_forward_accept"));
4718 }
4719 else
4720 {
[132]4721 char err_buf[SH_ERRBUF_SIZE];
[1]4722 errflag = errno;
4723 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_E_SUBGEN,
[132]4724 sh_error_message(errflag,err_buf, sizeof(err_buf)), _("accept"));
[1]4725 newconn->fd = -1;
4726 newconn->state = CONN_FREE;
4727 SL_RETURN( (-1), _("sh_forward_accept"));
4728 }
4729}
4730
4731extern char sh_sig_msg[64]; /* defined in sh_unix.c */
4732
4733/* ------------ port and interface -------
4734 */
4735static unsigned int server_port = SH_DEFAULT_PORT;
4736
[22]4737int sh_forward_set_port (const char * str)
[1]4738{
4739 int retval = 0;
4740 unsigned long i;
[22]4741 char * endptr;
[1]4742
4743 SL_ENTER(_("sh_forward_set_port"));
4744 i = strtoul (str, &endptr, 0);
4745 if (endptr == str) {
4746 retval = -1;
4747 } else if (i > 65535) {
4748 retval = -1;
4749 } else {
4750 server_port = i;
4751 }
4752 SL_RETURN( (retval), _("sh_forward_set_port"));
4753}
4754
4755static struct in_addr server_interface;
4756static int use_server_interface = 0;
4757
[22]4758int sh_forward_set_interface (const char * str)
[1]4759{
4760 if (0 == strcmp(str, _("INADDR_ANY")))
4761 {
4762 use_server_interface = 0;
4763 return 0;
4764 }
4765 if (0 == /*@-unrecog@*/inet_aton(str, &server_interface)/*@+unrecog@*/)
4766 {
4767 use_server_interface = 0;
4768 return -1;
4769 }
4770 use_server_interface = 1;
4771 return 0;
4772}
4773
4774/* ------------ print error --------------
4775 */
4776struct sock_err_st {
4777 char msg[128];
4778 int errnum;
4779 int port;
4780 int line;
4781 int euid;
4782};
4783
4784static struct sock_err_st sock_err[2];
4785
4786void sh_forward_printerr(char * str, int errnum, unsigned int port, int line)
4787{
4788 int slot = 0;
4789
4790 if (port != server_port)
4791 slot = 1;
4792 if (str == NULL)
4793 sock_err[slot].msg[0] = '\0';
4794 else
4795 sl_strlcpy(sock_err[slot].msg, str, 128);
4796 sock_err[slot].errnum = errnum;
4797 sock_err[slot].port = port;
4798 sock_err[slot].line = line;
4799 sock_err[slot].euid = (int) geteuid();
4800}
4801
4802int sh_forward_printerr_final(int slot)
4803{
[132]4804 char errbuf[SH_ERRBUF_SIZE];
4805
[1]4806 SL_ENTER(_("sh_forward_printerr_final"));
4807 if (sock_err[slot].msg[0] != '\0')
4808 {
4809 dlog(1, FIL__, __LINE__,
4810 _("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"),
[132]4811 sh_error_message(sock_err[slot].errnum, errbuf, sizeof(errbuf)),
4812 sock_err[slot].euid,
[1]4813 sock_err[slot].port);
4814 sh_error_handle((-1), FIL__, sock_err[slot].line,
4815 sock_err[slot].errnum, MSG_EXIT_ABORTS,
[132]4816 sh_error_message(sock_err[slot].errnum, errbuf, sizeof(errbuf)),
[1]4817 sh.prg_name,
4818 sock_err[slot].msg);
4819 SL_RETURN((-1), _("sh_forward_printerr_final"));
4820 }
4821 SL_RETURN(0, _("sh_forward_printerr_final"));
4822}
4823
[219]4824#define TIME_OUT_DEF 900
4825static unsigned long time_out_val = TIME_OUT_DEF;
4826
4827int sh_forward_set_timeout (const char * c)
4828{
4829 long val;
4830
4831 SL_ENTER(_("sh_forward_set_time_out"));
4832
4833 val = strtol (c, (char **)NULL, 10);
4834
4835 if (val == 0)
4836 {
4837 val = TIME_OUT_DEF;
4838 }
4839 else if (val < 0)
4840 {
4841 time_out_val = TIME_OUT_DEF;
4842 SL_RETURN( (-1), _("sh_forward_set_time_out"));
4843 }
4844
4845 time_out_val = (unsigned long) val;
4846 SL_RETURN( (0), _("sh_forward_set_time_out"));
4847}
4848
4849
[1]4850static sh_conn_t * conns = NULL;
4851static int maxconn = 0; /* maximum number of simultaneous connections */
4852
4853
4854#ifdef INET_SYSLOG
4855#define INET_SUSPEND_TIME 180 /* equal to 3 minutes */
4856#define SH_MINSOCK 3
4857int create_syslog_socket (int flag);
4858static int recv_syslog_socket (int fd);
4859static int syslog_sock = -1;
4860#else
4861#define SH_MINSOCK 2
4862#endif
4863
4864extern int pf_unix_fd;
4865
4866/* the tcp socket, and the function to establish it
4867 */
4868static int sh_tcp_sock = -1;
4869
[170]4870int sh_create_tcp_socket (void)
[1]4871{
4872 struct sockaddr_in addr;
4873 int addrlen = sizeof(addr);
4874
4875 int sock = -1;
4876 int errnum = 0;
4877 int flag = 1; /* non-zero to enable an option */
4878
4879 SL_ENTER(_("sh_create_tcp_socket"));
4880
4881 sh_forward_printerr (NULL, 0, server_port, __LINE__);
4882
4883 /* create the socket, bind() it and listen()
4884 */
4885 if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0 )
4886 {
4887 errnum = errno;
4888 sh_forward_printerr (_("socket"), errnum, server_port, __LINE__);
4889 SL_RETURN((-1), _("sl_create_tcp_socket"));
4890 }
4891 (void) retry_fcntl( FIL__, __LINE__, sock, F_SETFD, 1 );
4892
4893 if ( setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
4894 (void *) &flag, sizeof(flag)) < 0 )
4895 {
4896 errnum = errno;
4897 sh_forward_printerr (_("setsockopt"), errnum, server_port, __LINE__);
4898 SL_RETURN((-1), _("sl_create_tcp_socket"));
4899 }
4900
4901 addr.sin_family = AF_INET;
4902 addr.sin_port = htons(server_port);
4903 if (use_server_interface == 0)
4904 addr.sin_addr.s_addr = INADDR_ANY;
4905 else
4906 memcpy(&addr.sin_addr, &server_interface, sizeof(struct in_addr));
4907
4908 if ( bind(sock, (struct sockaddr *) &addr, addrlen) < 0)
4909 {
4910 errnum = errno;
4911 sh_forward_printerr (_("bind"), errnum, server_port, __LINE__);
4912 SL_RETURN((-1), _("sl_create_tcp_socket"));
4913 }
4914
4915 if ( retry_fcntl( FIL__, __LINE__, sock, F_SETFL, O_NONBLOCK ) < 0 )
4916 {
4917 errnum = errno;
4918 sh_forward_printerr (_("fcntl"), errnum, server_port, __LINE__);
4919 SL_RETURN((-1), _("sl_create_tcp_socket"));
4920 }
4921
4922 if ( listen(sock, 5) < 0)
4923 {
4924 errnum = errno;
4925 sh_forward_printerr (_("listen"), errnum, server_port, __LINE__);
4926 SL_RETURN((-1), _("sl_create_tcp_socket"));
4927 }
4928
4929 sh_tcp_sock = sock;
4930
4931 SL_RETURN((sock), _("sl_create_tcp_socket"));
4932}
4933
4934/*****************************************
4935 *
4936 * This is the server main loop.
4937 *
4938 * The server is set up for listening, and
4939 * and starts a select() loop.
4940 *
4941 *****************************************/
4942
4943void sh_receive()
4944{
4945#ifdef SH_USE_XML
4946 extern int sh_log_file (char * message, char * inet_peer);
4947#endif
4948
4949 int sock = -1;
4950 sh_conn_t * cx;
4951 fd_set readset;
4952 fd_set writeset;
4953 struct timeval tv;
4954 int num_sel;
4955 int errnum;
4956 int nowconn;
4957 int status;
4958 int high_fd;
4959 register int i;
4960 long dummy = 0;
4961 unsigned long time_now;
4962 unsigned long time_last = 0;
[219]4963 unsigned long time_out = time_out_val;
[1]4964
4965 time_t told;
4966 time_t tcurrent;
4967
4968 unsigned long tchkold;
4969
4970 struct sigaction new_act;
4971 struct sigaction old_act;
[171]4972
4973 int setsize_fd;
[1]4974
4975 SL_ENTER(_("sh_receive"));
4976
4977 /* ignore SIGPIPE (instead get EPIPE if connection is closed)
4978 * --- we have called sh_unix_init() already ---
4979 */
4980 new_act.sa_handler = SIG_IGN;
[22]4981 sigemptyset( &new_act.sa_mask ); /* set an empty mask */
4982 new_act.sa_flags = 0; /* init sa_flags */
[1]4983 retry_sigaction (FIL__, __LINE__, SIGPIPE, &new_act, &old_act);
4984
4985 if ( sh_forward_printerr_final(0) < 0)
4986 {
4987 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
4988 }
4989 sock = sh_tcp_sock;
4990
4991 /* ****************************************************************
4992 *
4993 * This is a non-forking server. We use select() on the listen()
4994 * socket to watch for new connections. For new connections, accept()
4995 * will return a new socket that is put in the read/write filesets.
4996 * Data about active connections are kept in the 'conns' table.
4997 *
4998 ******************************************************************/
4999
5000 /* The table to hold info on sockets.
5001 * We reserve 6 file descriptors for misc. use.
5002 * The POSIX lower limit on open files seems to be eight.
5003 */
[171]5004 maxconn = get_open_max() - 6;
5005 /* ugly fix for FreeBSD compiler warning; casting FD_SETSIZE in the
5006 * conditional expression does not suppress the warning... */
5007 setsize_fd = (int)FD_SETSIZE;
5008 maxconn = (setsize_fd < maxconn) ? setsize_fd : maxconn;
[1]5009
[34]5010 if (maxconn < 0 || !sl_ok_muls(maxconn, sizeof(sh_conn_t)))
5011 {
5012 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_START_SRV,
5013 0, sock);
5014 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
5015 }
[1]5016 conns = SH_ALLOC (sizeof(sh_conn_t) * maxconn);
5017
5018 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_START_SRV,
5019 (maxconn-1), sock);
5020
5021 /* timer
5022 */
5023 tcurrent = (unsigned long) time (NULL);
5024 told = tcurrent;
5025
5026 tchkold = tcurrent;
5027
5028 for (i = SH_MINSOCK; i < maxconn; ++i)
5029 {
5030 conns[i].buf = NULL;
5031 conns[i].K = NULL;
5032 conns[i].A = NULL;
5033 conns[i].M1 = NULL;
5034 conns[i].FileName = NULL;
5035 conns[i].fd = -1;
5036 sh_forward_do_free ( &conns[i]);
5037 }
5038
5039 /* status init
5040 */
5041 server_status.conn_open = 0;
5042 server_status.conn_total = 0;
5043 server_status.conn_max = maxconn-1;
5044 server_status.start = time (NULL);
5045 server_status.last = (time_t) 0;
5046
5047 nowconn = 1;
5048 tv.tv_sec = 5;
5049 tv.tv_usec = 0;
5050
5051 /* conns[0] is the listen() socket. Always in read mode.
5052 */
5053 conns[0].fd = sock;
5054 conns[0].state = CONN_READING;
5055 high_fd = sock;
5056
5057 conns[1].fd = pf_unix_fd;
5058 conns[1].state = CONN_READING;
5059 high_fd = (pf_unix_fd > high_fd) ? pf_unix_fd : high_fd;
5060
5061#ifdef INET_SYSLOG
5062 conns[2].fd = -1;
5063 if ( sh_forward_printerr_final(1) < 0)
5064 {
5065 SH_FREE(conns);
5066 conns = NULL;
5067 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
5068 }
5069 sock = syslog_sock;
5070
5071 if (sock >= 0)
5072 {
5073 conns[2].fd = sock;
5074 conns[2].state = CONN_READING;
5075 high_fd = (high_fd > conns[2].fd) ? high_fd : conns[2].fd;
5076 }
5077#endif
5078
5079 sh_html_write(all_clients);
5080
5081 /* This is the select() loop.
5082 */
5083 while (1 == 1)
5084 {
5085
5086 if (sig_raised > 0)
5087 {
5088 TPT((0, FIL__, __LINE__, _("msg=<Process a signal.>\n")))
5089
5090 if (sig_termfast == 1) /* SIGTERM */
5091 {
5092 TPT((0, FIL__, __LINE__, _("msg=<Terminate.>\n")));
5093 strncpy (sh_sig_msg, _("SIGTERM"), 20);
5094 --sig_raised; --sig_urgent;
5095 aud_exit (FIL__, __LINE__, EXIT_SUCCESS);
5096 }
5097
5098 if (sig_config_read_again == 1)
5099 {
5100 TPT((0, FIL__, __LINE__, _("msg=<Re-read configuration.>\n")));
5101 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_RECONF);
5102
5103
5104 /* -- Delete the name server cache. --
5105 */
5106
5107 delete_cache();
5108#if defined(WITH_EXTERNAL)
5109 /* -- Delete list of external tasks. --
5110 */
5111 (void) sh_ext_cleanup();
5112#endif
[215]5113#if defined(SH_WITH_MAIL)
5114 sh_nmail_free();
5115#endif
[1]5116 /* - mark all clients dead
5117 * - read configuration file
5118 * - remove clients still dead
5119 */
5120 sh_forward_mark_dead ();
5121
5122 reset_count_dev_console();
5123 reset_count_dev_time();
5124 sl_trust_purge_user();
5125
5126 (void) sh_readconf_read ();
5127 for (i = SH_MINSOCK; i < maxconn; ++i)
5128 if (conns[i].state != CONN_FREE &&
5129 conns[i].client_entry != NULL &&
5130 conns[i].client_entry->dead_flag == 1)
5131 sh_forward_do_free ( &conns[i]);
5132 sh_forward_clean_tree ();
5133
5134 sig_config_read_again = 0;
5135 --sig_raised;
5136 }
5137
5138 if (sig_fresh_trail == 1) /* SIGIOT */
5139 {
5140 /* Logfile access
5141 */
5142#ifdef SH_USE_XML
5143 sh_log_file (NULL, NULL);
5144#endif
5145 TPT((0, FIL__, __LINE__, _("msg=<Logfile stop/restart.>\n")));
5146 sh_error_only_stderr (S_TRUE);
5147 sh_unix_rm_lock_file(sh.srvlog.name);
5148 retry_msleep(3, 0);
5149 sh.flag.log_start = S_TRUE;
5150 sh_error_only_stderr (S_FALSE);
5151 sig_fresh_trail = 0;
5152 --sig_raised;
5153 }
5154
5155
5156 if (sig_terminate == 1 && nowconn < 2) /* SIGQUIT */
5157 {
5158 TPT((0, FIL__, __LINE__, _("msg=<Terminate.>\n")));
5159 strncpy (sh_sig_msg, _("SIGQUIT"), 20);
5160 --sig_raised; --sig_urgent;
5161 aud_exit (FIL__, __LINE__, EXIT_SUCCESS);
5162 }
5163
5164
5165 if (sig_debug_switch == 1) /* SIGUSR1 */
5166 {
5167 TPT((0, FIL__, __LINE__, _("msg=<Debug switch.>\n")));
5168 sh_error_dbg_switch();
5169 sig_debug_switch = 0;
5170 --sig_raised;
5171 }
5172
[19]5173 if (sig_suspend_switch > 0) /* SIGUSR2 */
[1]5174 {
5175 TPT((0, FIL__, __LINE__, _("msg=<Suspend switch.>\n")));
5176 if (sh_global_suspend_flag == 1) {
5177 sh_global_suspend_flag = 0;
5178 } else {
5179 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_SUSPEND,
5180 sh.prg_name);
5181 sh_global_suspend_flag = 1;
5182 }
[19]5183 --sig_suspend_switch;
[1]5184 --sig_raised; --sig_urgent;
5185 }
5186
5187 sig_raised = (sig_raised < 0) ? 0 : sig_raised;
5188 sig_urgent = (sig_urgent < 0) ? 0 : sig_urgent;
5189 TPT((0, FIL__, __LINE__, _("msg=<End signal processing.>\n")));
5190 }
5191
5192 if (sh_global_suspend_flag == 1)
5193 {
5194 (void) retry_msleep (1, 0);
5195 continue;
5196 }
5197
5198 /* Recompute the descriptor set. select() modifies it,
5199 * thus we update it using the info from the connection table.
5200 * Also recompute the number of open connections.
5201 */
5202 FD_ZERO( &readset );
5203 FD_ZERO( &writeset );
5204 FD_SET(conns[0].fd, &readset );
5205 high_fd = conns[0].fd;
5206
5207 if (conns[1].fd > -1)
5208 {
5209 FD_SET(conns[1].fd, &readset );
5210 high_fd = (high_fd > conns[1].fd) ? high_fd : conns[1].fd;
5211 }
5212
5213#ifdef INET_SYSLOG
5214 if (conns[2].fd > -1)
5215 {
5216 FD_SET(conns[2].fd, &readset );
5217 high_fd = (high_fd > conns[2].fd) ? high_fd : conns[2].fd;
5218 }
5219#endif
5220
5221 time_now = (unsigned long) time (NULL);
5222 nowconn = 1;
5223
5224 for (i = SH_MINSOCK; i < maxconn; ++i)
5225 {
5226 /* eliminate timed out connections
5227 */
5228 if (conns[i].state != CONN_FREE)
5229 {
5230 if (time_now-conns[i].timer > time_out)
5231 {
5232 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_TCP_TIMOUT,
5233 conns[i].peer);
5234 sh_forward_do_free ( &conns[i]);
5235 }
5236 else
5237 ++nowconn;
5238 }
5239
5240
5241 if (conns[i].state == CONN_READING)
5242 {
5243 FD_SET(conns[i].fd, &readset);
5244 high_fd = (high_fd < conns[i].fd ? conns[i].fd : high_fd);
5245 }
5246 else if (conns[i].state == CONN_SENDING)
5247 {
5248 FD_SET(conns[i].fd, &writeset);
5249 high_fd = (high_fd < conns[i].fd ? conns[i].fd : high_fd);
5250 }
5251 }
5252
5253 /* -- Exponentially reduce timeout limit if more than 1/2 full. --
5254 */
[219]5255 /* Eliminate this, will cause problems when too much clients are
5256 * starting up. */
5257#if 0
[1]5258 if (nowconn > (maxconn/2))
5259 time_out = ( (time_out/2) > 1) ? (time_out/2) : 1;
5260 else
[219]5261 time_out = time_out_val;
5262#endif
[1]5263
5264
5265 /* -- Do the select(). --
5266 */
5267 num_sel = select(high_fd+1, &readset, &writeset, NULL, &tv);
5268 errnum = errno;
5269
5270 /* reset timeout - modified by select() on some systems
5271 */
5272 tv.tv_sec = 5;
5273 tv.tv_usec = 0;
5274
5275
5276 if ( (time_now - time_last) > 2L)
5277 {
5278 time_last = time_now;
5279 if (sh_html_write(all_clients) < 0)
5280 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_E_HTML);
5281 }
5282
5283
5284 /* Error handling.
5285 */
5286 if ( num_sel < 0 ) /* some error */
5287 {
[132]5288 char errbuf[SH_ERRBUF_SIZE];
5289
[1]5290 if (sig_raised == 1)
5291 {
5292 sig_raised = 2;
5293 continue;
5294 }
5295
5296 if ( errnum == EINTR)
5297 continue; /* try again */
5298
5299 if ( errnum == EBADF)
5300 {
5301 /* seek and destroy the bad fd
5302 */
5303 for (i = SH_MINSOCK; i < high_fd; ++i)
5304 {
5305 if ((conns[i].state == CONN_READING) ||
5306 (conns[i].state == CONN_SENDING))
5307 {
5308 if (-1 == retry_fcntl(FIL__, __LINE__,
5309 conns[i].fd, F_GETFL, dummy))
5310 sh_forward_do_free ( &conns[i]);
5311 }
5312 }
5313 continue;
5314 }
5315
5316 sh_error_handle((-1), FIL__, __LINE__, errnum, MSG_EXIT_ABORTS,
[132]5317 sh_error_message(errnum, errbuf, sizeof(errbuf)),
[1]5318 sh.prg_name,
5319 _("select"));
5320 aud_exit(FIL__, __LINE__, EXIT_FAILURE );
5321 }
5322
5323
5324 /* log the timestamp
5325 */
5326 if ((tcurrent - told) > sh.looptime )
5327 {
5328 told = tcurrent;
5329#ifdef MEM_DEBUG
5330 sh_mem_check();
5331 sh_unix_count_mlock();
5332#else
5333 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_STAMP);
5334#endif
5335 }
5336
5337#if defined(SH_WITH_MAIL)
5338 /*
5339 * flush the mail queue
5340 */
5341 if (tcurrent - sh.mailTime.alarm_last > sh.mailTime.alarm_interval)
5342 {
5343 TPT((0, FIL__, __LINE__, _("msg=<Flush mail queue.>\n")))
[214]5344 (void) sh_nmail_flush ();
[1]5345 sh.mailTime.alarm_last = tcurrent;
5346 }
5347#endif
5348#ifdef MEM_DEBUG
5349 sh_mem_dump();
5350#endif
5351
5352 tcurrent = (unsigned long) time (NULL);
5353
[19]5354 /* check for time limit exceeded
5355 */
5356 if ((tcurrent - tchkold) > (unsigned int) 3 )
5357 {
5358 tchkold = tcurrent;
5359 client_time_check(/* all_clients */);
5360 }
5361
5362 /* seed / re-seed the PRNG if required
5363 */
5364 (void) taus_seed();
5365
[1]5366 /* select() timeout handling.
5367 */
5368 if ( num_sel == 0 ) /* timeout - no connection */
5369 {
5370 if (sh_html_write(all_clients) < 0)
5371 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_E_HTML);
5372 continue;
5373 }
5374
5375 /* New connection.
5376 */
5377 if ( FD_ISSET(conns[0].fd , &readset )) /* a new connection */
5378 {
5379 --num_sel;
5380 status = 0;
5381 if (nowconn < maxconn && sig_terminate == 0 && sig_termfast == 0)
5382 {
5383 i = SH_MINSOCK;
5384 while (i < maxconn)
5385 {
5386 if (conns[i].state == CONN_FREE)
5387 {
5388 status = sh_forward_accept (conns[0].fd, &conns[i]);
5389 if (status == 0)
5390 {
5391 high_fd =
5392 (high_fd > conns[i].fd ? high_fd : conns[i].fd);
5393 ++server_status.conn_open;
5394 ++server_status.conn_total;
5395 server_status.last = time (NULL);
5396 }
5397 break;
5398 }
5399 ++i;
5400 }
5401 }
5402 if (status == 0)
5403 continue;
5404 }
5405
5406 /* check for commands on the socket
5407 */
5408 if (conns[1].fd > (-1) && FD_ISSET(conns[1].fd , &readset ))
5409 {
5410 sh_socket_poll();
5411 }
5412
5413#ifdef INET_SYSLOG
5414 if (conns[2].fd > (-1) && FD_ISSET(conns[2].fd , &readset ))
5415 {
5416 recv_syslog_socket (conns[2].fd);
5417 }
5418#endif
5419
5420 /* Check for pending read/write on the rest of the sockets.
5421 */
5422 for ( i = SH_MINSOCK; num_sel > 0 && i < maxconn; ++i )
5423 {
5424 if (sig_termfast == 1)
5425 break;
5426
5427 cx = &conns[i];
5428 if ( cx->state == CONN_READING &&
5429 FD_ISSET( cx->fd, &readset ) )
5430 {
5431 --num_sel;
5432 sh_forward_do_read ( cx );
5433 }
5434 else if ( cx->state == CONN_SENDING &&
5435 FD_ISSET( cx->fd, &writeset ) )
5436 {
5437 --num_sel;
5438 sh_forward_do_write ( cx );
5439 }
5440 }
[19]5441 /* continue */
[1]5442 }
5443 /* notreached */
5444}
5445
[170]5446void free_client_tree (void)
[1]5447{
5448 SL_ENTER(_("free_client_tree"));
5449 zAVLFreeTree (all_clients, free_client);
5450 SL_RET0(_("free_client_tree"));
5451}
5452
5453void sh_forward_free_all ()
5454{
5455 register int i;
5456
5457 SL_ENTER(_("sh_forward_free_all"));
5458
5459 if (conns != NULL)
5460 for (i = SH_MINSOCK; i < maxconn; ++i)
5461 {
5462 sh_forward_do_free ( &conns[i]);
5463 }
5464
5465
5466 free_client_tree ();
5467
5468 if (conns != NULL)
5469 SH_FREE (conns);
5470
5471 SL_RET0(_("sh_forward_free_all"));
5472}
5473
5474#ifdef INET_SYSLOG
5475
5476#ifdef HAVE_INET_ATON
5477static char * my_inet_ntoa(struct in_addr in)
5478{
5479 return inet_ntoa(in);
5480}
5481#else
5482static char * my_inet_ntoa(struct in_addr in)
5483{
5484 unsigned char a, b, c, d;
5485 static char foo[16];
5486 char bar[4];
5487 memcpy (bar, &(in.s_addr), 4); /* memory alignment (?) */
5488 memcpy (&a, &bar[0], 1);
5489 memcpy (&b, &bar[1], 1);
5490 memcpy (&c, &bar[2], 1);
5491 memcpy (&d, &bar[3], 1);
5492 sprintf(foo, "%d.%d.%d.%d", /* known to fit */
5493 (int) a, (int) b, (int) c, (int) d);
5494 return foo;
5495}
5496#endif
5497
5498
5499/* Unlike Linux / FreeBSD, most systems don't define the stuff below
5500 * in syslog.h
5501 */
5502
5503#ifndef LOG_FAC
5504#define LOG_FAC(p) (((p) & LOG_FACMASK) >> 3)
5505#endif
5506
5507#ifndef LOG_PRI
5508#define LOG_PRI(p) ((p) & LOG_PRIMASK)
5509#endif
5510
5511typedef struct sh_code {
5512 char *c_name;
5513 int c_val;
5514} SH_CODE;
5515
5516SH_CODE sh_facilitynames[] =
5517{
5518#ifdef LOG_AUTH
5519 { N_("auth"), LOG_AUTH },
5520#endif
5521#ifdef LOG_AUTHPRIV
5522 { N_("authpriv"), LOG_AUTHPRIV },
5523#endif
5524#ifdef LOG_CRON
5525 { N_("cron"), LOG_CRON },
5526#endif
5527#ifdef LOG_DAEMON
5528 { N_("daemon"), LOG_DAEMON },
5529#endif
5530#ifdef LOG_FTP
5531 { N_("ftp"), LOG_FTP },
5532#endif
5533#ifdef LOG_KERN
5534 { N_("kern"), LOG_KERN },
5535#endif
5536#ifdef LOG_LPR
5537 { N_("lpr"), LOG_LPR },
5538#endif
5539#ifdef LOG_MAIL
5540 { N_("mail"), LOG_MAIL },
5541#endif
5542#ifdef INTERNAL_MARK
5543 { N_("mark"), INTERNAL_MARK }, /* INTERNAL */
5544#endif
5545#ifdef LOG_NEWS
5546 { N_("news"), LOG_NEWS },
5547#endif
5548#ifdef LOG_AUTH
5549 { N_("security"), LOG_AUTH }, /* DEPRECATED */
5550#endif
5551#ifdef LOG_SYSLOG
5552 { N_("syslog"), LOG_SYSLOG },
5553#endif
5554#ifdef LOG_USER
5555 { N_("user"), LOG_USER },
5556#endif
5557#ifdef LOG_UUCP
5558 { N_("uucp"), LOG_UUCP },
5559#endif
5560#ifdef LOG_LOCAL0
5561 { N_("local0"), LOG_LOCAL0 },
5562#endif
5563#ifdef LOG_LOCAL1
5564 { N_("local1"), LOG_LOCAL1 },
5565#endif
5566#ifdef LOG_LOCAL2
5567 { N_("local2"), LOG_LOCAL2 },
5568#endif
5569#ifdef LOG_LOCAL3
5570 { N_("local3"), LOG_LOCAL3 },
5571#endif
5572#ifdef LOG_LOCAL4
5573 { N_("local4"), LOG_LOCAL4 },
5574#endif
5575#ifdef LOG_LOCAL5
5576 { N_("local5"), LOG_LOCAL5 },
5577#endif
5578#ifdef LOG_LOCAL6
5579 { N_("local6"), LOG_LOCAL6 },
5580#endif
5581#ifdef LOG_LOCAL7
5582 { N_("local7"), LOG_LOCAL7 },
5583#endif
5584 { NULL, -1 }
5585};
5586
5587
5588SH_CODE sh_prioritynames[] =
5589{
5590#ifdef LOG_ALERT
5591 { N_("alert"), LOG_ALERT },
5592#endif
5593#ifdef LOG_CRIT
5594 { N_("crit"), LOG_CRIT },
5595#endif
5596#ifdef LOG_DEBUG
5597 { N_("debug"), LOG_DEBUG },
5598#endif
5599#ifdef LOG_EMERG
5600 { N_("emerg"), LOG_EMERG },
5601#endif
5602#ifdef LOG_ERR
5603 { N_("err"), LOG_ERR },
5604#endif
5605#ifdef LOG_ERR
5606 { N_("error"), LOG_ERR }, /* DEPRECATED */
5607#endif
5608#ifdef LOG_INFO
5609 { N_("info"), LOG_INFO },
5610#endif
5611#ifdef INTERNAL_NOPRI
5612 { N_("none"), INTERNAL_NOPRI }, /* INTERNAL */
5613#endif
5614#ifdef LOG_NOTICE
5615 { N_("notice"), LOG_NOTICE },
5616#endif
5617#ifdef LOG_EMERG
5618 { N_("panic"), LOG_EMERG }, /* DEPRECATED */
5619#endif
5620#ifdef LOG_WARNING
5621 { N_("warn"), LOG_WARNING }, /* DEPRECATED */
5622#endif
5623#ifdef LOG_WARNING
5624 { N_("warning"), LOG_WARNING },
5625#endif
5626 { NULL, -1 }
5627};
5628
5629static int enable_syslog_socket = S_FALSE;
5630
5631static int recv_syslog_socket (int fd)
5632{
5633 static time_t return_next = 0;
5634 int priority = 0;
5635 int fac, pri;
5636 int i;
5637 char * cfac = NULL;
5638 char * cpri = NULL;
5639 int res;
5640 char * tmp;
5641 char * bptr;
5642 char * ptr = NULL;
5643 char buf[1048];
5644 struct sockaddr_in from;
[132]5645 char errbuf[SH_ERRBUF_SIZE];
[1]5646
5647 /* The 6th argument in recvfrom is *socklen_t in Linux and *BSD,
5648 * but *int everywhere else. Because socklen_t is unsigned int, there
5649 * should be no problem as long as sizeof(struct sockaddr_in) < INT_MAX ...
5650 */
5651 int fromlen = sizeof(from);
5652
5653 if (enable_syslog_socket == S_FALSE)
5654 return 0;
5655
5656 SL_ENTER(_("recv_syslog_socket"));
5657
5658 if (return_next > 0)
5659 {
5660 if ( (time(NULL) - return_next) < 2)
5661 SL_RETURN( 0, _("recv_syslog_socket"));
5662 else
5663 return_next = 0;
5664 }
5665
5666 res = recvfrom(fd, buf, 1047, 0, (struct sockaddr *) &from, &fromlen);
5667
5668 if (res > 0)
5669 {
5670 res = (res < 1047) ? res : 1047;
5671 buf[res] = '\0';
5672 if (res > 1 && buf[res-1] == '\n')
5673 buf[res-1] = '\0';
5674
5675 /* here we expect an xml formatted message, thus we don't
5676 escape xml special chars (flag == 0) */
5677 /* commented out to not escape twice */
5678 /* bptr = sh_tools_safe_name(buf, 0); */
5679 bptr = buf;
5680
5681 if (!bptr || !(*bptr))
5682 {
5683 res = errno;
5684 TPT(( 0, FIL__, __LINE__, _("msg=<UDP error: %d>\n"), res));
5685 sh_error_handle((-1), FIL__, __LINE__, res, MSG_ERR_SYSLOG,
[132]5686 sh_error_message(res, errbuf, sizeof(errbuf)),
5687 my_inet_ntoa(from.sin_addr));
[1]5688 SL_RETURN( (-1), _("recv_syslog_socket"));
5689 }
5690
5691 TPT(( 0, FIL__, __LINE__, _("msg=<UDP message from %s>\n"),
5692 my_inet_ntoa(from.sin_addr)));
5693 ptr = bptr;
5694 i = 0;
5695 if (*ptr == '<')
5696 {
5697 ++ptr; ++i;
5698 while (i < res &&
5699 (unsigned char) *ptr > 47 && (unsigned char) *ptr < 58)
5700 {
5701 priority = 10 * priority + (*ptr - '0');
5702 ++ptr;
5703 ++i;
5704 }
5705 if (*ptr == '>')
5706 ++ptr;
5707 }
5708 fac = LOG_FAC(priority);
5709 i = 0;
5710 while (sh_facilitynames[i].c_name != NULL)
5711 {
5712 if (sh_facilitynames[i].c_val == (fac<<3))
5713 { cfac = sh_util_strdup(_(sh_facilitynames[i].c_name)); break; }
5714 ++i;
5715 }
5716 pri = LOG_PRI(priority);
5717 i = 0;
5718 while (sh_prioritynames[i].c_name != NULL)
5719 {
5720 if (sh_prioritynames[i].c_val == pri)
5721 { cpri = sh_util_strdup(_(sh_prioritynames[i].c_name)); break; }
5722 ++i;
5723 }
5724
5725 /* here we do not expect an xml formatted message, thus we escape
5726 xml special chars (flag == 1) */
5727 tmp = sh_tools_safe_name (ptr, 1);
5728 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_INET_SYSLOG,
5729 my_inet_ntoa(from.sin_addr),
5730 (cfac == NULL) ? _("none") : cfac,
5731 (cpri == NULL) ? _("none") : cpri,
5732 (ptr == NULL) ? _("none") : ptr);
5733 if (cfac != NULL)
5734 SH_FREE(cfac);
5735 if (cpri != NULL)
5736 SH_FREE(cpri);
5737 SH_FREE(tmp);
5738 /* SH_FREE(bptr); */
5739 }
5740
5741 else if (res < 0 && errno != EINTR)
5742 {
5743 res = errno;
5744 TPT(( 0, FIL__, __LINE__, _("msg=<UDP error: %d>\n"), res));
5745 sh_error_handle((-1), FIL__, __LINE__, res, MSG_ERR_SYSLOG,
[132]5746 sh_error_message(res, errbuf, sizeof(errbuf)),
5747 my_inet_ntoa(from.sin_addr));
[1]5748
5749 /* don't accept anything the next 2 seconds
5750 */
5751 return_next = time(NULL);
5752 SL_RETURN( (-1), _("recv_syslog_socket"));
5753 }
5754 SL_RETURN( (0), _("recv_syslog_socket"));
5755}
5756
[22]5757int set_syslog_active(const char * c)
[1]5758{
5759 return sh_util_flagval(c, &enable_syslog_socket);
5760}
5761
5762/* callerFlag == S_TRUE means override the enable_syslog_socket flag
5763 */
5764int create_syslog_socket (int callerFlag)
5765{
5766 int flag = 1; /* non-zero to enable an option */
5767 int sock;
5768 int errnum;
5769 int res;
5770 struct sockaddr_in addr;
5771 int addrlen = sizeof(addr);
5772
5773 SL_ENTER(_("create_syslog_socket"));
5774
5775 if (callerFlag == S_FALSE)
5776 {
5777 if (enable_syslog_socket == S_FALSE && syslog_sock >= 0)
5778 {
5779 /* user does not wish to use this facility
5780 */
5781 TPT(( 0, FIL__, __LINE__, _("msg=<close syslog socket>\n")));
5782 close(syslog_sock);
5783 syslog_sock = -1;
5784 }
5785 SL_RETURN((-1), _("create_syslog_socket"));
5786 }
5787
5788 sh_forward_printerr (NULL, 0, 514, __LINE__);
5789
5790 /* create the socket, bind() it and listen()
5791 */
5792 sock = socket(AF_INET, SOCK_DGRAM, 0);
5793
5794 if (sock < 0)
5795 {
5796 errnum = errno;
5797 sh_forward_printerr (_("syslog socket"), errnum, 514, __LINE__);
5798 SL_RETURN((-1), _("create_syslog_socket"));
5799 }
5800 (void) retry_fcntl( FIL__, __LINE__, sock, F_SETFD, 1 );
5801
5802 if ( setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
5803 (void *) &flag, sizeof(flag)) < 0 )
5804 {
5805 errnum = errno;
5806 sh_forward_printerr (_("syslog setsockopt SO_REUSEADDR"),
5807 errnum, 514, __LINE__);
5808 SL_RETURN((-1), _("create_syslog_socket"));
5809 }
5810
5811#if defined(SO_BSDCOMPAT)
5812 if ( setsockopt(sock, SOL_SOCKET, SO_BSDCOMPAT,
5813 (void *) &flag, sizeof(flag)) < 0 )
5814 {
5815 errnum = errno;
5816 sh_forward_printerr (_("syslog setsockopt SO_BSDCOMPAT"),
5817 errnum, 514, __LINE__);
5818 SL_RETURN((-1), _("create_syslog_socket"));
5819 }
5820#endif
5821
5822 memset(&addr, 0, sizeof(addr));
5823 addr.sin_family = AF_INET;
5824 addr.sin_port = htons(514);
5825
5826 res = bind(sock, (struct sockaddr *) &addr, addrlen);
5827
5828 if ( res < 0)
5829 {
5830 errnum = errno;
5831 sh_forward_printerr (_("syslog bind"), errnum, 514, __LINE__);
5832 close(sock);
5833 SL_RETURN((-1), _("create_syslog_socket"));
5834 }
5835
5836 syslog_sock = sock;
5837
5838 SL_RETURN((sock), _("create_syslog_socket"));
5839}
5840/* #ifdef INET_SYSLOG */
5841#endif
5842
5843
5844
5845/* #ifdef SH_WITH_SERVER */
5846#endif
5847
5848
5849
5850
5851
5852
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