source: trunk/src/sh_mail.c@ 132

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

Make utility functions thread-safe.
File size: 49.0 KB
Line 
1/* SAMHAIN file system integrity testing */
2/* Copyright (C) 1999, 2000 Rainer Wichmann */
3/* */
4/* This program is free software; you can redistribute it */
5/* and/or modify */
6/* it under the terms of the GNU General Public License as */
7/* published by */
8/* the Free Software Foundation; either version 2 of the License, or */
9/* (at your option) any later version. */
10/* */
11/* This program is distributed in the hope that it will be useful, */
12/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
13/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
14/* GNU General Public License for more details. */
15/* */
16/* You should have received a copy of the GNU General Public License */
17/* along with this program; if not, write to the Free Software */
18/* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
19
20#include "config_xor.h"
21
22#include <stdio.h>
23#include <stdlib.h>
24#include <string.h>
25#include <unistd.h>
26#include <pwd.h>
27#include <sys/types.h>
28#include <sys/stat.h>
29#include <fcntl.h>
30#include <errno.h>
31#include <signal.h>
32#include <setjmp.h>
33
34#if defined(SH_WITH_MAIL)
35
36#if TIME_WITH_SYS_TIME
37#include <sys/time.h>
38#include <time.h>
39#else
40#if HAVE_SYS_TIME_H
41#include <sys/time.h>
42#else
43#include <time.h>
44#endif
45#endif
46
47
48#ifdef HAVE_MEMORY_H
49#include <memory.h>
50#endif
51
52#include "samhain.h"
53#include "sh_error.h"
54#include "sh_unix.h"
55#include "sh_tiger.h"
56#include "sh_mail.h"
57#include "sh_utils.h"
58#include "sh_fifo.h"
59#include "sh_tools.h"
60
61#undef FIL__
62#define FIL__ _("sh_mail.c")
63#undef GOOD
64#undef BAD
65
66static int failedMail = SL_FALSE;
67
68/* MX Resolver Struct
69 */
70typedef struct mx_ {
71 int pref;
72 char * address;
73} mx;
74
75typedef struct dnsrep_ {
76 int count;
77 mx * reply;
78} dnsrep;
79
80static int free_mx (dnsrep * answers);
81static dnsrep * return_mx (char *domain);
82
83/*********************************************
84 * utility function for verifying mails
85 *********************************************/
86
87typedef struct mail_trail_struct {
88 char trail_id[2*SH_MINIBUF];
89 char trail_key[KEY_LEN+1];
90 struct mail_trail_struct * next;
91} mail_trail_type;
92
93static mail_trail_type * mail_trail = NULL;
94
95int sh_mail_sigverify (const char * s)
96{
97 SL_TICKET fd;
98 long i;
99 char * buf;
100 char * bufc;
101 char key[81];
102 char number[2*SH_MINIBUF];
103 char audit_id[2 * SH_MINIBUF];
104 long numsig;
105 char key2[KEY_LEN+1];
106
107 char * theSig;
108
109 mail_trail_type * mail_trail_ptr = NULL;
110
111 sh_error_logoff();
112
113 ASSERT((s != NULL && sl_strlen(s) < PATH_MAX),
114 _("(s != NULL && sl_strlen(s) < PATH_MAX)"));
115
116 if (s == NULL || sl_strlen(s) >= PATH_MAX)
117 _exit (EXIT_FAILURE);
118
119 /* open the file, then check it
120 */
121 if (0 != sl_is_suid())
122 {
123 fprintf(stderr, _("Cannot open file %s in suid mode\n"), s);
124 _exit (EXIT_FAILURE);
125 }
126 if ( SL_ISERROR(fd = sl_open_read (s, SL_NOPRIV)))
127 {
128 fprintf(stderr, _("Could not open file %s\n"), s);
129 _exit (EXIT_FAILURE);
130 }
131
132 buf = SH_ALLOC( (size_t)(SH_BUFSIZE+1));
133 bufc = SH_ALLOC( (size_t)(SH_MAXBUF+1));
134
135 while (1 == 1)
136 {
137 buf[0] = '\0';
138 bufc[0] = '\0';
139
140 /* find start of next message
141 */
142 while (0 != sl_strncmp(buf, _("-----BEGIN MESSAGE-----"),
143 sizeof("-----BEGIN MESSAGE-----")-1))
144 {
145 (void) sh_unix_getline (fd, buf, SH_BUFSIZE);
146 if (buf[0] == '\0')
147 {
148 /* End of mailbox reached, exit.
149 */
150 (void) fflush(stdout);
151 _exit (EXIT_SUCCESS);
152
153 /* Fix for AIX cc complaint.
154 */
155 /*@notreached@*/
156 return 0;
157 }
158 }
159
160 /* Read message, compress into bufc.
161 */
162 while (1 == 1)
163 {
164 (void) sh_unix_getline (fd, buf, SH_BUFSIZE);
165 if (0 == sl_strncmp(buf, _("-----BEGIN SIGNATURE-----"),
166 sizeof("-----BEGIN SIGNATURE-----")-1))
167 break;
168 if (buf[0] == '\0')
169 _exit (EXIT_FAILURE);
170 (void) sh_util_compress(bufc, buf, SH_MAXBUF-KEY_LEN);
171 }
172
173 /* get signature and number
174 */
175 (void) sh_unix_getline (fd, key, (int)sizeof(key));
176 key[KEY_LEN] = '\0';
177
178 (void) sh_unix_getline (fd, number, (int)sizeof(number));
179 number[(2*SH_MINIBUF) - 2] = '\0';
180 numsig = atol (number);
181 (void) sl_strlcpy (audit_id, &number[7], 2*SH_MINIBUF);
182
183 fprintf(stderr, _("Message %06ld Trail %s\n"),
184 numsig, /*@-usedef@*/ audit_id /*@+usedef@*/);
185
186 mail_trail_ptr = mail_trail;
187 while (mail_trail_ptr)
188 {
189 if (0 == sl_strcmp(mail_trail_ptr->trail_id, audit_id))
190 break;
191 mail_trail_ptr = mail_trail_ptr->next;
192 }
193
194 if (!mail_trail_ptr)
195 {
196 if (numsig > 0)
197 {
198 fprintf (stderr, _("ERROR (no key -- cannot check)\n"));
199 continue;
200 }
201 else
202 {
203 mail_trail_ptr = SH_ALLOC (sizeof(mail_trail_type));
204 mail_trail_ptr->next = mail_trail;
205 mail_trail = mail_trail_ptr;
206 (void) sl_strlcpy (mail_trail_ptr->trail_id,
207 audit_id, 2*SH_MINIBUF);
208 }
209 }
210 else if (numsig == 0)
211 {
212 fprintf (stderr, _("ERROR (repeated audit trail)\n"));
213 continue;
214 }
215
216
217 if (numsig == 0)
218 {
219 sh_util_encode(key, bufc, 1, 'A');
220 (void) sl_strlcpy (mail_trail_ptr->trail_key, key, KEY_LEN+1);
221 fprintf (stderr, _("(unchecked)\n"));
222 }
223 else
224 {
225 /* iterate key
226 */
227 (void) sl_strlcpy(key2, mail_trail_ptr->trail_key, KEY_LEN+1);
228 for (i = 0; i < numsig; ++i)
229 {
230 (void) sl_strlcpy (key2,
231 sh_tiger_hash (key2, TIGER_DATA, KEY_LEN),
232 KEY_LEN+1);
233 }
234
235
236 theSig = sh_util_siggen (key2, bufc, sl_strlen(bufc));
237 if (sl_strncmp (key,
238 theSig,
239 KEY_LEN) != 0)
240 {
241 fprintf (stderr, _("(FAILED)\n"));
242 }
243 else
244 {
245 fprintf (stderr, _("(passed)\n"));
246 }
247
248 }
249
250 } /* end scan mailbox */
251
252 /*@notreached@*/
253}
254
255#define SH_FILT_NUM 32
256#define SH_FILT_OR 0
257#define SH_FILT_AND 1
258#define SH_FILT_NOT 2
259#define SH_FILT_INIT { 0, { NULL }, 0, { NULL }, 0, { NULL }}
260
261typedef struct _sh_filter_type
262{
263 int for_c;
264 char * for_v[SH_FILT_NUM];
265 int fand_c;
266 char * fand_v[SH_FILT_NUM];
267 int fnot_c;
268 char * fnot_v[SH_FILT_NUM];
269
270} sh_filter_type;
271
272static
273int sh_filter_filteradd (const char * argstring,
274 sh_filter_type * filter, int ftype)
275{
276 int i = 0;
277 int flag = 0;
278 size_t s;
279
280 char * dup;
281 char * p;
282 char * end;
283 int * ntok;
284 char ** stok;
285
286 SL_ENTER(_("sh_filter_filteradd"));
287
288 if (NULL == argstring)
289 {
290 SL_RETURN((-1), _("sh_filter_filteradd"));
291 }
292
293 if (ftype == SH_FILT_OR) {
294 ntok = &(filter->for_c);
295 stok = filter->for_v;
296 }
297 else if (ftype == SH_FILT_AND) {
298 ntok = &(filter->fand_c);
299 stok = filter->fand_v;
300 }
301 else if (ftype == SH_FILT_NOT) {
302 ntok = &(filter->fnot_c);
303 stok = filter->fnot_v;
304 }
305 else {
306 SL_RETURN((-1), _("sh_filter_filteradd"));
307 }
308
309 *ntok = 0;
310
311 dup = sh_util_strdup(argstring);
312 p = dup;
313
314 do
315 {
316 while (*p == ',' || *p == ' ' || *p == '\t')
317 ++p;
318 if (*p == '\0')
319 break;
320
321 end = p; ++end;
322 if (*end == '\0')
323 break;
324
325 if (*p == '\'')
326 {
327 ++p; end = p; ++end;
328 if (*p == '\0' || *end == '\0')
329 break;
330 while (*end != '\0' && *end != '\'')
331 ++end;
332 }
333 else if (*p == '"')
334 {
335 ++p; end = p; ++end;
336 if (*p == '\0' || *end == '\0')
337 break;
338 while (*end != '\0' && *end != '"')
339 ++end;
340 }
341 else
342 {
343 while (*end != '\0' && *end != ',' && *end != ' ' && *end != '\t')
344 ++end;
345 }
346 if (*end == '\0')
347 flag = 1;
348 else
349 *end = '\0';
350
351 s = strlen(p) + 1;
352 if (stok[i] != NULL)
353 SH_FREE(stok[i]);
354 stok[i] = SH_ALLOC(s);
355 (void) sl_strlcpy(stok[i], p, s);
356
357 p = end; ++p;
358
359 ++i;
360 if (i == SH_FILT_NUM)
361 break;
362 }
363 while (p != NULL && *p != '\0' && flag == 0);
364
365 *ntok = i;
366 SH_FREE(dup);
367
368 SL_RETURN (0, _("sh_filter_filteradd"));
369}
370
371/*
372 * -- check filters
373 */
374static
375int sh_filter_filter (const char * message, sh_filter_type * filter)
376{
377 int i;
378 int j = 0;
379
380 SL_ENTER(_("sh_mail_filter"));
381
382 /* Presence of any of these keywords prevents execution.
383 */
384 if (filter->fnot_c > 0)
385 {
386 for (i = 0; i < filter->fnot_c; ++i)
387 {
388 if (NULL != sl_strstr(message, filter->fnot_v[i]))
389 {
390 SL_RETURN ((-1), _("sh_filter_filter"));
391 }
392 }
393 }
394
395 /* Presence of all of these keywords is required for execution.
396 */
397 if (filter->fand_c > 0)
398 {
399 j = 0;
400
401 for (i = 0; i < filter->fand_c; ++i)
402 if (NULL != sl_strstr(message, filter->fand_v[i]))
403 ++j;
404
405 if (j != filter->fand_c)
406 {
407 SL_RETURN ((-1), _("sh_filter_filter"));
408 }
409 }
410
411 /* Presence of at least one of these keywords is required for execution.
412 */
413 if (filter->for_c > 0)
414 {
415 for (i = 0; i < filter->for_c; ++i)
416 {
417 if (NULL != sl_strstr(message, filter->for_v[i]))
418 {
419 goto isok;
420 }
421 }
422 SL_RETURN ((-1), _("sh_filter_filter"));
423 }
424
425 isok:
426 SL_RETURN ((0), _("sh_filter_filter"));
427}
428
429
430static sh_filter_type mail_filter = SH_FILT_INIT;
431
432/*
433 * -- add keywords to the OR filter
434 */
435int sh_mail_add_or (const char * str)
436{
437 return (sh_filter_filteradd (str, &(mail_filter), SH_FILT_OR));
438}
439
440/*
441 * -- add keywords to the AND filter
442 */
443int sh_mail_add_and (const char * str)
444{
445 return (sh_filter_filteradd (str, &(mail_filter), SH_FILT_AND));
446}
447
448/*
449 * -- add keywords to the NOT filter
450 */
451int sh_mail_add_not (const char * str)
452{
453 return (sh_filter_filteradd (str, &(mail_filter), SH_FILT_NOT));
454}
455
456
457static char * address_list[8] = {
458 NULL, NULL, NULL, NULL,
459 NULL, NULL, NULL, NULL
460};
461
462static int address_num = 0;
463static int address_num_compiled = 0;
464static int setaddress_compiled = S_FALSE;
465
466void reset_count_dev_mail(void)
467{
468 /* if not, then we still have the compiled-in address (if any), so we
469 * don' touch them
470 */
471 if (address_num_compiled == -99)
472 address_num = 0;
473 return;
474}
475
476int sh_mail_setaddress (const char * address)
477{
478 char * p;
479
480 SL_ENTER(_("sh_mail_setaddress"));
481
482 if (0 == strcmp(address, _("NULL")))
483 SL_RETURN ( (0), _("sh_mail_setaddress"));
484
485 if (address != NULL && address_num < (2 * SH_PATHBUF / 64 ))
486 {
487 if (address_num < (SH_PATHBUF / 64 ))
488 p = &sh.srvmail.name[address_num*64];
489 else
490 p = &sh.srvmail.alt[address_num*64];
491
492 (void) sl_strlcpy (p, address, 64);
493
494 if ((p == NULL) || ( sl_strlen(address) != sl_strlen(p)))
495 {
496 memset(p, (int)'\0', 64);
497 SL_RETURN ( (-1), _("sh_mail_setaddress"));
498 }
499 address_list[address_num] = p;
500#if 0
501 if (!sl_is_suid())
502 {
503 TPT(( 0, FIL__, __LINE__, _("msg=<address_list[%d] = %s>\n"),
504 address_num, address_list[address_num]));
505 }
506#endif
507 if (setaddress_compiled == S_TRUE)
508 {
509 ++address_num;
510 ++address_num_compiled;
511 }
512 else
513 {
514 if (address_num == address_num_compiled)
515 {
516 address_num = 0;
517 address_num_compiled = -99;
518 }
519 ++address_num;
520 }
521 SL_RETURN ( (0), _("sh_mail_setaddress"));
522 }
523 SL_RETURN ( (-1), _("sh_mail_setaddress"));
524}
525
526int sh_mail_setaddress_int (const char * address)
527{
528 int i;
529 SL_ENTER(_("sh_mail_setaddress_int"));
530 setaddress_compiled = S_TRUE;
531 i = sh_mail_setaddress(address);
532 setaddress_compiled = S_FALSE;
533 SL_RETURN(i, _("sh_mail_setaddress_int"));
534}
535
536int sh_mail_setNum (const char * str)
537{
538 int i = atoi (str);
539
540 SL_ENTER(_("sh_mail_setNum"));
541
542 if (i >= 0 && i < SH_FIFO_MAX)
543 sh.mailNum.alarm_interval = (time_t) i;
544 else
545 SL_RETURN ((-1), _("sh_mail_setNum"));
546 SL_RETURN( (0), _("sh_mail_setNum"));
547}
548
549
550static int all_in_one = S_FALSE;
551
552int sh_mail_setFlag (const char * str)
553{
554 int i;
555 SL_ENTER(_("sh_mail_setFlag"));
556 i = sh_util_flagval(str, &all_in_one);
557 SL_RETURN(i, _("sh_mail_setFlag"));
558}
559
560static char * mail_subject = NULL;
561
562int set_mail_subject (const char * str)
563{
564 SL_ENTER(_("set_mail_subject"));
565 if (!str)
566 SL_RETURN( (-1), _("set_mail_subject"));
567
568 if (mail_subject != NULL)
569 SH_FREE(mail_subject);
570
571 if (0 == sl_strncmp(str, _("NULL"), 4))
572 {
573 mail_subject = NULL;
574 SL_RETURN( 0, _("set_mail_subject"));
575 }
576
577 mail_subject = sh_util_strdup(str);
578 SL_RETURN( (0), _("set_mail_subject"));
579}
580
581
582static SH_FIFO * fifo_mail = NULL;
583
584static
585void sh_mail_emptystack (void)
586{
587 char * msg;
588 size_t len;
589
590 SL_ENTER(_("sh_mail_emptystack"));
591
592 if (fifo_mail == NULL)
593 SL_RET0(_("sh_mail_emptystack"));
594
595 while (NULL != (msg = pop_list(fifo_mail)))
596 {
597 len = sl_strlen(msg);
598 memset(msg, 0, len);
599 SH_FREE(msg);
600 }
601
602 SL_RET0(_("sh_mail_emptystack"));
603}
604
605/* insert "\r\n" after each 998 char
606 */
607static char * split_string(char * str);
608
609int sh_mail_pushstack (/*@null@*/char * msg)
610{
611 char * p;
612 int retval = 0;
613 int status;
614
615 SL_ENTER(_("sh_mail_pushstack"));
616
617 if (msg == NULL || failedMail == SL_TRUE || sh.srvmail.name[0] == '\0')
618 SL_RETURN((0), (_("sh_mail_pushstack")));
619
620 if (0 != sh_filter_filter(msg, &mail_filter))
621 SL_RETURN((0), (_("sh_mail_pushstack")));
622
623#if 0
624 if (msg != NULL && sl_strlen(msg) > 998) /* RFC 2822 */
625 msg[998] = '\0';
626#endif
627
628 p = split_string(msg);
629
630 if (fifo_mail == NULL)
631 {
632 fifo_mail = SH_ALLOC(sizeof(SH_FIFO));
633 fifo_init(fifo_mail);
634 }
635
636 status = push_list (fifo_mail, p);
637 if (status >= 0)
638 ++sh.mailNum.alarm_last;
639
640 SH_FREE(p);
641
642 if (sh.mailNum.alarm_last >= sh.mailNum.alarm_interval)
643 {
644 BREAKEXIT(sh_mail_msg);
645 retval = sh_mail_msg (NULL);
646 }
647
648 if (status == SH_FIFO_MAX)
649 retval = -2;
650 SL_RETURN(retval, (_("sh_mail_pushstack")));
651}
652
653
654/* The mailer.
655 */
656static int sh_mail_end_conn (FILE * connfile, int fd);
657static FILE * sh_mail_start_conn (int aFlag, int * fd);
658
659static
660void sh_mail_get_subject(char * message,
661 char * mheader, size_t len)
662{
663 st_format rep_serv_tab[] = {
664 { 'T', S_FMT_TIME, 0, 0, NULL},
665 { 'H', S_FMT_STRING, 0, 0, NULL},
666 { 'M', S_FMT_STRING, 0, 0, NULL},
667 { 'S', S_FMT_STRING, 0, 0, NULL},
668 {'\0', S_FMT_ULONG, 0, 0, NULL},
669 };
670
671 char * p;
672 char * mptr;
673 char sev[8];
674
675 SL_ENTER(_("sh_mail_get_subject"));
676
677 (void) sl_strlcpy(mheader, _("Subject: "), len);
678 if (NULL == strchr(mail_subject, '%'))
679 {
680 (void) sl_strlcat(mheader, mail_subject, len);
681 SL_RET0(_("sh_mail_get_subject"));
682 }
683
684
685 rep_serv_tab[0].data_ulong = (unsigned long) time(NULL);
686 rep_serv_tab[1].data_str = sh.host.name;
687
688 /* fast forward to the important part
689 */
690 mptr = sl_strstr(message, _("msg="));
691 if (mptr)
692 {
693 mptr += 4;
694 rep_serv_tab[2].data_str = mptr;
695 }
696 else
697 rep_serv_tab[2].data_str = message;
698
699 mptr = sl_strstr(message, _("sev="));
700 if (mptr)
701 {
702 mptr += 5;
703 sev[0] = *mptr; ++mptr;
704 sev[1] = *mptr; ++mptr;
705 sev[2] = *mptr; ++mptr;
706 sev[3] = *mptr; ++mptr;
707 sev[4] = '\0';
708 }
709 else
710 {
711 mptr = message;
712 sev[0] = *mptr; ++mptr;
713 sev[1] = *mptr; ++mptr;
714 sev[2] = *mptr; ++mptr;
715 sev[3] = *mptr; ++mptr;
716 if (*mptr == ' ') {
717 sev[4] = '\0';
718 } else {
719 sev[4] = *mptr; ++mptr;
720 if (*mptr == ' ') {
721 sev[5] = '\0';
722 } else {
723 sev[5] = *mptr;
724 sev[6] = '\0';
725 }
726 }
727 }
728 rep_serv_tab[3].data_str = sev;
729
730
731 p = sh_util_formatted(mail_subject, rep_serv_tab);
732 (void) sl_strlcat(mheader, p, len);
733 SH_FREE(p);
734 SL_RET0(_("sh_mail_get_subject"));
735}
736
737
738#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
739#include <sys/mman.h>
740#endif
741
742static char * sh_mail_realloc (char * inbuf, size_t * insize, size_t increase)
743{
744 size_t newsize;
745 char * outbuf = inbuf;
746
747 SL_ENTER(_("sh_mail_realloc"));
748
749 if (sl_ok_adds((*insize), 1))
750 {
751 newsize = (*insize) + 1;
752
753 if (sl_ok_adds(newsize, increase))
754 {
755 newsize += increase;
756
757 outbuf = SH_ALLOC(newsize);
758 MLOCK(outbuf, newsize);
759 (void) sl_strlcpy(outbuf, inbuf, newsize);
760
761 memset (inbuf, 0, (*insize));
762 MUNLOCK(inbuf, (*insize));
763 SH_FREE(inbuf);
764
765 *insize = newsize;
766 }
767 }
768
769 SL_RETURN( (outbuf), _("sh_mail_realloc"));
770}
771
772int sh_mail_msg (/*@null@*/char * message)
773{
774 char subject[32+32+SH_MINIBUF+2+3+SH_PATHBUF];
775 char mheader[32+32+SH_MINIBUF+2+3];
776
777 char * mailMsg;
778 char * popMsg;
779 int status = 0, errcount;
780 size_t wrlen;
781 int i;
782 int num_popped = 0;
783 int retval = -1;
784
785 char * bufcompress;
786 static int failcount = 0;
787 static int isfirst = 1;
788 static int mailcount = 0;
789 FILE * connfile = NULL;
790
791 struct sigaction old_act;
792 struct sigaction new_act;
793
794 static time_t id_audit = 0;
795 static time_t fail_time = 0;
796 static time_t success_time = 0;
797
798 static int ma_block = 0;
799
800 int ma_socket = -1;
801
802 SH_FIFO * fifo_temp = NULL;
803
804 char * theSig;
805 char * theMsg = NULL;
806
807 /* #define SH_MAILBUF (256) */
808#define SH_MAILBUF (8*4096)
809
810 size_t msgbufsize = SH_MAILBUF;
811 size_t combufsize = SH_MAILBUF;
812 char timebuf[81];
813
814 SL_ENTER(_("sh_mail_msg"));
815
816 if (ma_block == 1)
817 SL_RETURN( (0), _("sh_mail_msg"));
818
819 /* Return if we cannot mail.
820 */
821 if (failedMail == SL_TRUE)
822 SL_RETURN((-1), _("sh_mail_msg"));
823
824 if (failedMail == SL_FALSE && address_list[0] == NULL)
825 {
826 TPT((0, FIL__, __LINE__,
827 _("msg=<Mail error: no recipient address.>\n")));
828 failedMail = SL_TRUE;
829 SL_RETURN((-1), _("sh_mail_msg"));
830 }
831
832 if ( (success_time > 0) && (fail_time > 0) &&
833 (time(NULL) - success_time) > 3600*SH_MAX_FAIL)
834 {
835 ma_block = 1;
836 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_SRV_FAIL,
837 _("mail"), address_list[0]);
838 ma_block = 0;
839 sh_mail_emptystack();
840 sh.mailNum.alarm_last = 0;
841 failedMail = SL_TRUE;
842 SL_RETURN((-1), _("sh_mail_msg"));
843 }
844
845 /* Try at most each hour.
846 */
847 if ((fail_time > 0) && (time(NULL) - fail_time) < 3/*600*/)
848 {
849 if (failcount > 3)
850 {
851 /* -- Save for later. --
852 */
853 sh_mail_pushstack (message);
854 ++failcount;
855
856 SL_RETURN((-1), _("sh_mail_msg"));
857 }
858 else
859 {
860 (void) retry_msleep(2, 0);
861 ++failcount;
862 }
863 }
864
865 /* -- Reset time of last failure. --
866 */
867 fail_time = 0;
868
869 /* -- Polling, empty queue. --
870 */
871 if (message == NULL && sh.mailNum.alarm_last == 0)
872 SL_RETURN((-1), _("sh_mail_msg"));
873
874 /* -- Filtered. --
875 */
876 if (message != NULL && 0 != sh_filter_filter(message, &mail_filter))
877 SL_RETURN((-1), (_("sh_mail_msg")));
878
879
880
881 /* --------- Build complete message. ------------------------ */
882
883 theMsg = split_string(message);
884
885 /* ---------- Header ---------------------------------------- */
886
887 if (mail_subject == NULL)
888 {
889 (void) sl_strlcpy(mheader, _("Subject: "), sizeof(mheader)-5);
890 (void) sl_strlcat(mheader, sh_unix_time (0, timebuf, sizeof(timebuf)),
891 sizeof(mheader)-5);
892 (void) sl_strlcat(mheader, " ", sizeof(mheader)-5);
893 (void) sl_strlcat(mheader, sh.host.name, sizeof(mheader)-5);
894 }
895 else
896 {
897
898 if (message == NULL)
899 {
900 theMsg = pop_list(fifo_mail);
901 message = theMsg;
902 if (message)
903 --sh.mailNum.alarm_last;
904 }
905
906 if (message)
907 {
908 sh_mail_get_subject(message, mheader, sizeof(mheader)-5);
909 }
910 else
911 {
912 (void) sl_strlcpy(mheader, _("Subject: "), sizeof(mheader)-5);
913 (void) sl_strlcat(mheader, sh_unix_time (0, timebuf, sizeof(timebuf)),
914 sizeof(mheader)-5);
915 (void) sl_strlcat(mheader, " ", sizeof(mheader)-5);
916 (void) sl_strlcat(mheader, sh.host.name, sizeof(mheader)-5);
917 }
918 }
919
920 /* RFC 821: Header is terminated by an empty line
921 */
922 (void) sl_strlcat(mheader, "\015\012\015\012", sizeof(mheader));
923
924 /* ---------- Message --------------------------------------- */
925
926 (void) sl_strlcpy(subject, sh_unix_time (0, timebuf, sizeof(timebuf)),
927 sizeof(subject));
928 (void) sl_strlcat(subject, " ", sizeof(subject));
929 (void) sl_strlcat(subject, sh.host.name, sizeof(subject));
930 (void) sl_strlcat(subject, "\r\n", sizeof(subject));
931
932
933 mailMsg = (char *) SH_ALLOC (msgbufsize);
934 bufcompress = (char *) SH_ALLOC (combufsize);
935
936 MLOCK(mailMsg , msgbufsize);
937 MLOCK(bufcompress , combufsize);
938
939 (void) sl_strlcpy(mailMsg, mheader, msgbufsize);
940 bufcompress[0] = '\0';
941
942 (void) sl_strlcat(mailMsg, _("-----BEGIN MESSAGE-----\r\n"), msgbufsize);
943 (void) sl_strlcat(mailMsg, subject, msgbufsize);
944 (void) sh_util_compress (bufcompress, subject,
945 (combufsize - KEY_LEN - 1));
946 if (message != NULL)
947 {
948 if ((sl_strlen(theMsg) + sl_strlen(mailMsg) + 1) >
949 (msgbufsize-(4*KEY_LEN)))
950 {
951 mailMsg = sh_mail_realloc(mailMsg,
952 &msgbufsize, sl_strlen(theMsg)+2);
953 bufcompress = sh_mail_realloc(bufcompress,
954 &combufsize, sl_strlen(theMsg));
955 }
956 (void) sl_strlcat(mailMsg, theMsg, msgbufsize-(4*KEY_LEN));
957 (void) sl_strlcat(mailMsg, "\r\n", msgbufsize-(4*KEY_LEN));
958
959 (void) sh_util_compress (bufcompress, theMsg, combufsize-KEY_LEN-1);
960 }
961
962 if (sh.mailNum.alarm_last > 0)
963 {
964 fifo_temp = SH_ALLOC (sizeof(SH_FIFO));
965 fifo_init (fifo_temp);
966
967 while ( NULL != (popMsg = pop_list(fifo_mail)) )
968 {
969 (void) push_list (fifo_temp, popMsg);
970
971 if ((sl_strlen(popMsg) + sl_strlen(mailMsg) + 1) >
972 (msgbufsize-(4*KEY_LEN)))
973 {
974 mailMsg = sh_mail_realloc(mailMsg,
975 &msgbufsize,
976 sl_strlen(popMsg)+2);
977 bufcompress = sh_mail_realloc(bufcompress,
978 &combufsize,
979 sl_strlen(popMsg));
980 }
981
982 (void) sl_strlcat(mailMsg, popMsg, msgbufsize-(4*KEY_LEN));
983 (void) sl_strlcat(mailMsg, "\r\n", msgbufsize-(4*KEY_LEN));
984 (void) sh_util_compress(bufcompress, popMsg, combufsize-KEY_LEN-1);
985 SH_FREE(popMsg);
986 --sh.mailNum.alarm_last;
987 ++num_popped;
988 }
989 }
990
991 /* ------ signature block ------------------------------------ */
992
993 (void) sl_strlcat(mailMsg, _("-----BEGIN SIGNATURE-----\r\n"), msgbufsize);
994
995 /* Generate new signature key.
996 */
997 if (isfirst == 1)
998 {
999 BREAKEXIT(sh_util_keyinit);
1000 (void) sh_util_keyinit (skey->mailkey_old, KEY_LEN+1);
1001 }
1002
1003 /* iterate the key
1004 */
1005 (void) sl_strlcpy(skey->mailkey_new,
1006 sh_tiger_hash (skey->mailkey_old, TIGER_DATA, KEY_LEN),
1007 KEY_LEN+1);
1008
1009 if (isfirst == 0)
1010 {
1011 /* Sign the message with the signature key.
1012 */
1013 theSig = sh_util_siggen (skey->mailkey_new,
1014 bufcompress, sl_strlen(bufcompress));
1015 (void) sl_strlcat (mailMsg,
1016 theSig,
1017 msgbufsize);
1018 }
1019 else
1020 {
1021 id_audit = time (NULL);
1022
1023 /* reveal first signature key
1024 */
1025 /* flawfinder: ignore */
1026 (void) sl_strlcpy(skey->crypt, skey->mailkey_new, KEY_LEN+1);
1027
1028 BREAKEXIT(sh_util_encode);
1029 /* flawfinder: ignore */
1030 sh_util_encode(skey->crypt, bufcompress, 0, 'A');
1031
1032 /* flawfinder: ignore */
1033 (void) sl_strlcat (mailMsg, skey->crypt, msgbufsize);
1034 /* flawfinder: ignore */
1035 memset (skey->crypt, 0, KEY_LEN);
1036 isfirst = 0;
1037 }
1038 (void) sl_strlcat (mailMsg, "\r\n", msgbufsize);
1039
1040 /* X(n) -> X(n-1)
1041 */
1042 (void) sl_strlcpy (skey->mailkey_old, skey->mailkey_new, KEY_LEN+1);
1043
1044 sl_snprintf(subject, sizeof(subject), _("%06d %010ld::%s\r\n"),
1045 mailcount, (long) id_audit, sh.host.name);
1046
1047 (void) sl_strlcat (mailMsg, subject, msgbufsize);
1048 ++mailcount;
1049
1050 (void) sl_strlcat (mailMsg, _("-----END MESSAGE-----"), msgbufsize);
1051
1052
1053
1054 /* ---------- Connect ---------------------------------------- */
1055
1056
1057
1058 /* -- Catch (ignore) 'broken pipe'.
1059 */
1060 new_act.sa_handler = SIG_IGN;
1061 sigemptyset( &new_act.sa_mask ); /* set an empty mask */
1062 new_act.sa_flags = 0; /* init sa_flags */
1063
1064 (void) sigaction (SIGPIPE, &new_act, &old_act);
1065
1066 i = 0;
1067 errcount = 0;
1068
1069 if (all_in_one == S_FALSE)
1070 {
1071 while (address_list[i] != NULL && i < address_num)
1072 {
1073 connfile = sh_mail_start_conn (i, &ma_socket);
1074
1075 if (NULL != connfile)
1076 {
1077 wrlen = fwrite (mailMsg, 1, sl_strlen(mailMsg),
1078 connfile);
1079 wrlen -= sl_strlen(mailMsg);
1080 if (wrlen == 0)
1081 status = sh_mail_end_conn (connfile, ma_socket);
1082 else
1083 status = -1;
1084 }
1085 if (NULL == connfile || status != 0)
1086 {
1087 ma_block = 1;
1088 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_SRV_FAIL,
1089 _("mail"), address_list[i]);
1090 ma_block = 0;
1091 ++errcount;
1092 ++sh.statistics.mail_failed;
1093 }
1094 else
1095 {
1096 ++sh.statistics.mail_success;
1097 }
1098
1099 if (connfile != NULL)
1100 {
1101 (void) fclose (connfile);
1102 connfile = NULL;
1103 }
1104 ++i;
1105 }
1106 }
1107 else
1108 {
1109 connfile = sh_mail_start_conn ( -9 , &ma_socket);
1110
1111 if (NULL != connfile)
1112 {
1113 wrlen = fwrite (mailMsg, 1, sl_strlen(mailMsg), connfile);
1114 wrlen -= sl_strlen(mailMsg);
1115 if (wrlen == 0)
1116 status = sh_mail_end_conn (connfile, ma_socket);
1117 else
1118 status = -1;
1119 }
1120 if (NULL == connfile || status != 0)
1121 {
1122 ma_block = 1;
1123 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_SRV_FAIL,
1124 _("mail"), address_list[0]);
1125 ma_block = 0;
1126 errcount = address_num;
1127 ++sh.statistics.mail_failed;
1128 }
1129 else
1130 {
1131 ++sh.statistics.mail_success;
1132 }
1133
1134 if (connfile != NULL)
1135 {
1136 (void) fclose (connfile);
1137 connfile = NULL;
1138 }
1139 }
1140
1141
1142 memset (bufcompress, 0, combufsize);
1143 MUNLOCK(bufcompress , combufsize);
1144 SH_FREE(bufcompress);
1145
1146 memset (mailMsg, 0, msgbufsize);
1147 MUNLOCK(mailMsg , msgbufsize);
1148 SH_FREE(mailMsg);
1149
1150 /* --- Stay responsible for delivery in case of failure --- */
1151
1152 if (errcount == address_num && fifo_temp != NULL)
1153 {
1154 while ( (NULL != (popMsg = pop_list(fifo_temp))) )
1155 {
1156 if (push_list (fifo_mail, popMsg) >= 0)
1157 ++sh.mailNum.alarm_last;
1158 SH_FREE(popMsg);
1159 }
1160 if (message != NULL)
1161 {
1162 if (fifo_mail == NULL)
1163 {
1164 fifo_mail = SH_ALLOC(sizeof(SH_FIFO));
1165 fifo_init(fifo_mail);
1166 }
1167 retval = push_list (fifo_mail, theMsg);
1168 if (retval >= 0)
1169 ++sh.mailNum.alarm_last;
1170 if (retval == SH_FIFO_MAX)
1171 retval = -2;
1172 else
1173 retval = -1;
1174 }
1175 }
1176 else if (fifo_temp != NULL)
1177 {
1178 while ( (NULL != (popMsg = pop_list(fifo_temp))) )
1179 {
1180 SH_FREE(popMsg);
1181 }
1182 }
1183 if (fifo_temp != NULL)
1184 SH_FREE(fifo_temp);
1185
1186 /*
1187 if (connfile != NULL)
1188 fclose (connfile);
1189 */
1190
1191 if (theMsg != NULL)
1192 SH_FREE(theMsg);
1193
1194 /* --- Reset signal. ---
1195 */
1196 (void) sigaction (SIGPIPE, &old_act, NULL);
1197
1198 if (errcount == address_num)
1199 {
1200 fail_time = time(NULL);
1201 SL_RETURN((retval), _("sh_mail_msg"));
1202 }
1203 success_time = time(NULL);
1204 failcount = 0;
1205
1206 SL_RETURN((0), _("sh_mail_msg"));
1207}
1208
1209
1210/*
1211 *
1212 * SMTP CODE BELOW
1213 *
1214 *
1215 */
1216
1217#include <ctype.h>
1218#ifdef HOST_IS_HPUX
1219#define _XOPEN_SOURCE_EXTENDED
1220#endif
1221#include <netdb.h>
1222#include <sys/types.h>
1223#include <sys/socket.h>
1224#include <netinet/in.h>
1225#ifndef S_SPLINT_S
1226#include <arpa/inet.h>
1227#else
1228#define AF_INET 2
1229#endif
1230
1231#define SH_NEED_GETHOSTBYXXX
1232#include "sh_static.h"
1233
1234/* missing on HP-UX 10.20 */
1235#ifndef IPPORT_SMTP
1236#define IPPORT_SMTP 25
1237#endif
1238
1239static int sh_mail_wait(int code, FILE * m_socket);
1240
1241static char * relay_host = NULL;
1242
1243int sh_mail_set_relay (const char * str_s)
1244{
1245 SL_ENTER(_("sh_mail_set_relay"));
1246
1247 if (str_s == NULL)
1248 SL_RETURN( -1, _("sh_mail_set_relay"));
1249
1250 if (relay_host != NULL)
1251 {
1252 SH_FREE (relay_host);
1253 relay_host = NULL;
1254 }
1255
1256 if (0 == sl_strncmp(str_s, _("NULL"), 4))
1257 {
1258 SL_RETURN( 0, _("sh_mail_set_relay"));
1259 }
1260
1261 relay_host = sh_util_strdup(str_s);
1262
1263 SL_RETURN( 0, _("sh_mail_set_relay"));
1264}
1265
1266static char * mail_sender = NULL;
1267
1268int sh_mail_set_sender (const char *str)
1269{
1270 if (mail_sender != NULL)
1271 {
1272 SH_FREE (mail_sender);
1273 mail_sender = NULL;
1274 }
1275 if (str != NULL)
1276 {
1277 mail_sender = sh_util_strdup (str);
1278 }
1279 if (mail_sender == NULL)
1280 {
1281 return -1;
1282 }
1283 return 0;
1284}
1285
1286
1287/*************************
1288 *
1289 * start connection
1290 * for details on SMTP, see RFC 821
1291 */
1292
1293static time_t time_wait = 300;
1294
1295static FILE * sh_mail_start_conn (int aFlag, int * ma_socket)
1296{
1297 char * address;
1298
1299 int ecount;
1300
1301 char this_address[256];
1302 char ma_machine[256];
1303 char ma_user[256];
1304 char error_msg[256];
1305 char error_call[SH_MINIBUF];
1306 int error_num = 0;
1307 register int i, j, k;
1308 FILE * connFile = NULL;
1309 struct tm * my_tm;
1310#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
1311 struct tm time_tm;
1312#endif
1313 time_t my_time;
1314 char my_tbuf[128];
1315
1316 int fd;
1317
1318 dnsrep * answers;
1319 mx * result;
1320
1321 SL_ENTER(_("sh_mail_start_conn"));
1322
1323 *ma_socket = -1;
1324 time_wait = 300;
1325
1326 if (aFlag >= 0)
1327 address = address_list[aFlag];
1328 else
1329 address = address_list[0];
1330
1331 TPT(( 0, FIL__, __LINE__, _("msg=<aFlag %d address %s>\n"),
1332 aFlag, address));
1333
1334 /* ------- split adress ------------------ */
1335
1336 if (0 == strcmp(address, _("NULL")))
1337 {
1338 SL_RETURN( NULL, _("sh_mail_start_conn"));
1339 }
1340
1341 if (strchr (address, '@') == NULL) {
1342 (void) sl_strlcpy(ma_user, address, 256);
1343 (void) sl_strlcpy(ma_machine, _("localhost"), 256);
1344 } else {
1345 i = 0;
1346 while (i < 255 && address[i] != '@') {
1347 ma_user[i] = address[i];
1348 ++i;
1349 }
1350
1351 /* adress[i] = '@'
1352 */
1353 ma_user[i] = '\0';
1354 j = i + 1; k = i; i = 0;
1355 while (i < 255 && address[i+j] != '\0') {
1356 ma_machine[i] = address[i+j];
1357 ++i;
1358 }
1359 ma_machine[i] = '\0';
1360 if (address[k] != '@' || address[k+i+1] != '\0')
1361 {
1362 SL_RETURN( NULL, _("sh_mail_start_conn"));
1363 }
1364 }
1365
1366
1367 if (relay_host != NULL)
1368 {
1369 (void) sl_strlcpy (ma_machine, relay_host, sizeof(ma_machine));
1370 TPT((0, FIL__, __LINE__, _("msg=<user %s machine %s>\n"),
1371 ma_user, ma_machine));
1372 fd = connect_port (ma_machine, IPPORT_SMTP,
1373 error_call, &error_num, error_msg, 256);
1374 }
1375 else
1376 {
1377 answers = return_mx (ma_machine);
1378 if (answers)
1379 {
1380 result = answers->reply;
1381 fd = -1;
1382 for (i = 0; i < answers->count; ++i)
1383 {
1384 (void) sl_strlcpy(ma_machine, result[i].address,
1385 sizeof(ma_machine));
1386 TPT((0, FIL__, __LINE__,
1387 _("msg=<user %s mx %s pref %d>\n"),
1388 ma_user, ma_machine, result[i].pref));
1389 fd = connect_port (ma_machine, IPPORT_SMTP,
1390 error_call, &error_num, error_msg, 256);
1391 if (fd >= 0)
1392 break;
1393 }
1394 (void) free_mx(answers);
1395 }
1396 else
1397 {
1398 (void) sl_strlcpy(error_call, _("return_mx"), SH_MINIBUF);
1399 (void) sl_strlcpy(error_msg, _("The specified host is unknown: "),
1400 256);
1401 (void) sl_strlcat(error_msg, ma_machine, 256);
1402 fd = -1;
1403 }
1404 }
1405
1406
1407 if (fd < 0)
1408 {
1409 sh_error_handle ((-1), FIL__, __LINE__, error_num,
1410 MSG_E_NET, error_msg, error_call,
1411 _("email"), ma_machine);
1412 SL_RETURN( NULL, _("sh_mail_start_conn"));
1413 }
1414
1415 /* associate a FILE structure with it
1416 */
1417 connFile = fdopen (fd, "r+");
1418 if (connFile == NULL)
1419 {
1420 TPT(( 0, FIL__, __LINE__, _("msg=<fdopen() failed>\n")));
1421 (void) close(fd);
1422 SL_RETURN( NULL, _("sh_mail_start_conn"));
1423 }
1424
1425
1426 /* say HELO to the other socket
1427 */
1428 if (0 == sh_mail_wait (220, fd))
1429 {
1430 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_E_NET,
1431 _("Timeout on SMTP session init"),
1432 _("sh_mail_start_conn"),
1433 _("mail"), sh.host.name);
1434 TPT(( 0, FIL__, __LINE__, _("msg=<Timeout>\n")));
1435 (void) fclose(connFile);
1436 SL_RETURN( NULL, _("sh_mail_start_conn"));
1437 }
1438
1439 (void) fflush(connFile);
1440
1441 if (0 != is_numeric(sh.host.name))
1442 {
1443 TPT(( 0, FIL__, __LINE__, _("msg=<HELO [%s]>%c%c"),
1444 sh.host.name, 13, 10));
1445 }
1446 else
1447 {
1448 TPT(( 0, FIL__, __LINE__, _("msg=<HELO %s>%c%c"),
1449 sh.host.name, 13, 10));
1450 }
1451 if (0 != is_numeric(sh.host.name))
1452 fprintf(connFile, _("HELO [%s]%c%c"), sh.host.name, 13, 10);
1453 else
1454 fprintf(connFile, _("HELO %s%c%c"), sh.host.name, 13, 10);
1455
1456 (void) fflush(connFile);
1457
1458 if (0 == sh_mail_wait(250, fd))
1459 {
1460 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_E_NET,
1461 _("HELO failed"), _("sh_mail_start_conn"),
1462 _("mail"), sh.host.name);
1463
1464 TPT(( 0, FIL__, __LINE__, _("msg=<Timeout.>\n")));
1465 (void) fclose(connFile);
1466 SL_RETURN( NULL, _("sh_mail_start_conn"));
1467 }
1468
1469 /* tell them who we are
1470 */
1471 (void) sl_strlcpy (this_address,
1472 mail_sender ? mail_sender : DEFAULT_SENDER, 256);
1473 if (NULL == strchr(this_address, '@'))
1474 {
1475 (void) sl_strlcat (this_address, "@", 256);
1476 if (0 != is_numeric(sh.host.name))
1477 (void) sl_strlcat (this_address, _("example.com"), 256);
1478 else
1479 (void) sl_strlcat (this_address, sh.host.name, 256);
1480 }
1481
1482 TPT(( 0, FIL__, __LINE__, _("msg=<MAIL FROM:<%s>>%c%c"),
1483 this_address, 13, 10));
1484
1485 (void) fflush(connFile);
1486 /*@-usedef@*/
1487 fprintf(connFile, _("MAIL FROM:<%s>%c%c"), this_address, 13, 10);
1488 /*@+usedef@*/
1489 (void) fflush(connFile);
1490
1491 if (0 == sh_mail_wait(250, fd))
1492 {
1493 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_E_NET,
1494 _("MAIL FROM failed"), _("sh_mail_start_conn"),
1495 _("mail"), this_address);
1496 TPT(( 0, FIL__, __LINE__, _("msg=<Timeout.>\n")));
1497 (void) fclose(connFile);
1498 SL_RETURN( NULL, _("sh_mail_start_conn"));
1499 }
1500
1501 /* tell them who to send mail to
1502 */
1503 if (aFlag >= 0)
1504 {
1505 TPT(( 0, FIL__, __LINE__, _("msg=<RCPT TO:<%s>>%c%c"),
1506 address, 13, 10));
1507
1508 (void) fflush(connFile);
1509 fprintf(connFile, _("RCPT TO:<%s>%c%c"), address, 13, 10);
1510 (void) fflush(connFile);
1511
1512 if (0 == sh_mail_wait(250, fd))
1513 {
1514 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_E_NET,
1515 _("RCPT TO failed"), _("sh_mail_start_conn"),
1516 _("mail"), address);
1517 TPT(( 0, FIL__, __LINE__, _("msg=<Timeout.>\n")));
1518 (void) fclose(connFile);
1519 SL_RETURN( NULL, _("sh_mail_start_conn"));
1520 }
1521 }
1522 else
1523 {
1524 ecount = 0;
1525 for (i = 0; i < address_num; ++i)
1526 {
1527 if (address_list[i] == NULL) /* paranoia */
1528 break;
1529 TPT(( 0, FIL__, __LINE__, _("msg=<RCPT TO:<%s>>%c%c"),
1530 address_list[i], 13, 10));
1531
1532 (void) fflush(connFile);
1533 fprintf(connFile, _("RCPT TO:<%s>%c%c"), address_list[i], 13, 10);
1534 (void) fflush(connFile);
1535
1536 if (0 == sh_mail_wait(250, fd))
1537 {
1538 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_E_NET,
1539 _("RCPT TO failed"), _("sh_mail_start_conn"),
1540 _("mail"), address_list[i]);
1541
1542 TPT(( 0, FIL__, __LINE__, _("msg=<Timeout.>\n")));
1543 ++ecount;
1544 }
1545 }
1546 if (ecount == address_num)
1547 {
1548 (void) fclose(connFile);
1549 SL_RETURN( NULL, _("sh_mail_start_conn"));
1550 }
1551 }
1552
1553 /* Send the message
1554 */
1555 TPT(( 0, FIL__, __LINE__, _("msg=<DATA>%c%c"), 13, 10));
1556
1557 (void) fflush(connFile);
1558 fprintf(connFile, _("DATA%c%c"), 13, 10);
1559 (void) fflush(connFile);
1560
1561 if (0 == sh_mail_wait(354, fd))
1562 {
1563 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_E_NET,
1564 _("DATA failed"), _("sh_mail_start_conn"),
1565 _("mail"), address);
1566 TPT(( 0, FIL__, __LINE__, _("msg=<Timeout.>\n")));
1567 (void) fclose(connFile);
1568 SL_RETURN( NULL, _("sh_mail_start_conn"));
1569 }
1570
1571
1572 my_time = time(NULL);
1573#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
1574 my_tm = localtime_r(&my_time, &time_tm);
1575#else
1576 my_tm = localtime(&my_time);
1577#endif
1578 (void) strftime(my_tbuf, 127, _("%a, %d %b %Y %H:%M:%S %Z"), my_tm);
1579
1580 TPT(( 0, FIL__, __LINE__, _("msg=<From: <%s>%c%cTo: <%s>%c%cDate: %s>%c%c"),
1581 this_address, 13, 10, address, 13, 10, my_tbuf, 13, 10));
1582
1583 (void) fflush(connFile);
1584 fprintf(connFile,
1585 _("From: <%s>%c%c"\
1586 "To: <%s>%c%c"\
1587 "Date: %s%c%c"),
1588 this_address, 13, 10,
1589 address, 13, 10,
1590 my_tbuf, 13, 10);
1591
1592 *ma_socket = fd;
1593 SL_RETURN( connFile, _("sh_mail_start_conn"));
1594}
1595
1596/*************************
1597 *
1598 * end connection
1599 *
1600 */
1601
1602static int sh_mail_end_conn (FILE * connFile, int fd)
1603{
1604 SL_ENTER(_("sh_mail_end_conn"));
1605
1606 time_wait = 300;
1607
1608 (void) fflush(connFile);
1609 fprintf(connFile, _("%c%c.%c%c"), 13, 10, 13, 10);
1610 (void) fflush(connFile);
1611
1612 TPT(( 0, FIL__, __LINE__, _("msg=<message end written>\n")));
1613
1614 if (0 != sh_mail_wait(250, fd))
1615 {
1616 (void) fflush(connFile);
1617 fprintf(connFile, _("QUIT%c%c"), 13, 10);
1618 (void) fflush(connFile);
1619 TPT(( 0, FIL__, __LINE__, _("msg=<exit>\n")));
1620
1621 SL_RETURN (0, _("sh_mail_end_conn"));
1622 }
1623
1624 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_E_NET,
1625 _("QUIT failed"), _("sh_mail_end_conn"),
1626 _("mail"), _("SMTP server"));
1627
1628 TPT(( 0, FIL__, __LINE__, _("msg=<abnormal exit>\n")));
1629
1630 SL_RETURN ((-1), _("sh_mail_end_conn"));
1631}
1632
1633
1634
1635/****************************
1636 *
1637 * Handle server replies
1638 *
1639 *
1640 */
1641
1642static int sh_mail_wait(int code, int ma_socket)
1643{
1644 int rcode, g;
1645
1646 char c;
1647
1648 char errmsg[128];
1649
1650 enum {
1651 WAIT_CODE_START,
1652 WAIT_CODE,
1653 WAIT_NL,
1654 WAIT_NL_CONT
1655 } state;
1656
1657 time_t waited_time;
1658
1659 SL_ENTER(_("mail_wait"));
1660
1661 waited_time = time(NULL);
1662
1663 /* timeout after 5 minutes
1664 */
1665
1666 rcode = 0;
1667 state = WAIT_CODE_START;
1668
1669 while (sl_read_timeout_fd (ma_socket, &c, 1, time_wait, SL_FALSE) > 0) {
1670
1671 g = (int) c;
1672
1673 if ( (g=fgetc(ma_socket)) == EOF)
1674 {
1675 TPT((0, FIL__, __LINE__, _("msg=<mail_wait: EOF>\n")));
1676 SL_RETURN( 0, _("mail_wait"));
1677 }
1678
1679 switch(state) {
1680
1681 /* wait for start of a numerical code
1682 */
1683 case WAIT_CODE_START:
1684 if (0 != isspace(g))
1685 break; /* Skip white space */
1686 if (0 == isdigit(g))
1687 return 0; /* No leading number */
1688 rcode = g-(int)'0'; /* convert to number */
1689 state = WAIT_CODE;
1690 break;
1691
1692 /* wait for completion of numerical code
1693 */
1694 case WAIT_CODE:
1695 if (0 != isdigit(g)) {
1696 rcode = rcode * 10 + (g-(int)'0'); /* next digit */
1697 break;
1698 }
1699 /*@+charintliteral@*/
1700 state = ((g == '-') ? WAIT_NL_CONT : WAIT_NL);
1701 /*@-charintliteral@*/
1702 break;
1703
1704 /* wait for newline, then return with status code
1705 */
1706 case WAIT_NL:
1707 /*@+charintliteral@*/
1708 if (g != '\n')
1709 break;
1710 /*@-charintliteral@*/
1711
1712 TPT((0, FIL__, __LINE__,
1713 _("msg=<mail_wait: OK got %d (%d) need %d (%d)>\n"),
1714 rcode, (int)(rcode/100), code, (int)(code/100) ));
1715 g = ((int)(rcode/100) == (int)(code/100)) ? 1 : 0;
1716 if (g != 1)
1717 {
1718 sl_snprintf(errmsg, sizeof(errmsg),
1719 _("Bad response (%d), expected %d"), rcode, code);
1720
1721 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_E_NET,
1722 errmsg, _("sh_mail_wait"),
1723 _("mail"), _("SMTP server"));
1724 }
1725 waited_time = time(NULL) - waited_time;
1726 time_wait -= waited_time;
1727 TPT((0, FIL__, __LINE__,
1728 _("msg=<mail_wait: time_wait reduced to %d sec>\n"),
1729 (int) time_wait));
1730 SL_RETURN( (g), _("mail_wait")) ;
1731
1732 /* wait for continuation line
1733 */
1734 /*@fallthrough@*//* no, but splint doesn't understand */
1735 case WAIT_NL_CONT:
1736 /*@+charintliteral@*/
1737 if (g == '\n')
1738 state = WAIT_CODE_START; /* There is a continuation line */
1739 /*@-charintliteral@*/
1740 break;
1741
1742 default:
1743
1744 TPT((0, FIL__, __LINE__, _("msg=<mail_wait: bad>\n")));
1745 SL_RETURN( 0, _("mail_wait"));
1746
1747 }
1748 }
1749
1750 TPT((0, FIL__, __LINE__, _("msg=<mail_wait: failed>\n")));
1751
1752 /* Failed, EOF or error on socket */
1753 SL_RETURN( 0, _("mail_wait"));
1754}
1755
1756/* -- function to insert "\r\n" after each 998 chars --
1757 */
1758
1759#define SPLIT_AT 998
1760
1761static char * split_string(char * str)
1762{
1763 size_t size;
1764 size_t blocks;
1765 int count = 0;
1766
1767 char * p, * p0;
1768 char * q;
1769
1770 if (!str)
1771 return NULL;
1772
1773 size = strlen(str) + 1;
1774 blocks = 1 + (size / SPLIT_AT);
1775
1776 if (sl_ok_muls(2, blocks) && sl_ok_adds(size, (2*blocks)))
1777 {
1778 size = size + (2*blocks);
1779 }
1780 else
1781 {
1782 /* integer overflow, do not split */
1783 p = sh_util_strdup(str);
1784 return p;
1785 }
1786
1787 p = SH_ALLOC(size);
1788 memset(p, 0, size);
1789
1790 p0 = p;
1791
1792 q = str;
1793 while (*q != '\0') {
1794 *p = *q;
1795 ++p;
1796 ++q;
1797 ++count;
1798 if (0 == (count % SPLIT_AT)) {
1799 count = 0;
1800 *p = '\r';
1801 ++p;
1802 *p = '\n';
1803 ++p;
1804 }
1805 }
1806 /* fprintf(stderr, "used = %d\n", strlen(p0)); */
1807
1808 return p0;
1809}
1810
1811
1812
1813/*****************************************************************
1814 *
1815 * MX Resolver Routines
1816 *
1817 *****************************************************************/
1818
1819#if defined(HAVE_ARPA_NAMESER_H)
1820
1821#include <netinet/in.h>
1822#ifdef __APPLE__
1823#define BIND_8_COMPAT 1
1824#endif
1825#ifndef S_SPLINT_S
1826#include <arpa/nameser.h>
1827#include <resolv.h>
1828#endif
1829#include <netdb.h>
1830#include <sys/socket.h>
1831#ifndef S_SPLINT_S
1832#include <arpa/inet.h>
1833#endif
1834
1835#include "sh_tools.h"
1836
1837#ifndef HFIXEDSZ
1838#define HFIXEDSZ 12
1839#endif
1840#ifndef QFIXEDSZ
1841#define QFIXEDSZ 4
1842#endif
1843
1844/*@unused@*//* used in get_mx() which is not parsed by splint */
1845static unsigned int get_short (unsigned char * loc)
1846{
1847 unsigned int retval = 0;
1848 if (loc)
1849 {
1850 /* byte order: MSB first
1851 */
1852 /*@+charint@*/
1853 retval = (((unsigned char) * loc) * 256) | ((unsigned char) * (loc + 1));
1854 /*@-charint@*/
1855 }
1856 return (retval);
1857}
1858
1859/* parser errors with splint */
1860#ifndef S_SPLINT_S
1861static dnsrep * get_mx (char *hostname)
1862{
1863 int ret, length, status;
1864 mx * result;
1865 size_t len;
1866
1867 typedef union
1868 {
1869 HEADER head;
1870 unsigned char buffer[4096];
1871 } querybuf;
1872
1873 querybuf reply;
1874 char expanded[1024];
1875 unsigned char * comp_dn, * eom;
1876 HEADER * header;
1877 int type, rdlength, pref;
1878 unsigned int count, index;
1879 dnsrep * retval;
1880
1881 SL_ENTER(_("get_mx"));
1882
1883 if (0 != res_init ())
1884 SL_RETURN (NULL, _("get_mx"));
1885
1886 errno = 0;
1887 length = res_query (hostname, C_IN, T_MX,
1888 (unsigned char *) &reply, 4095);
1889 if (length < 1)
1890 {
1891 char errbuf[SH_ERRBUF_SIZE];
1892
1893 /* error handling
1894 */
1895 if (length == -1)
1896 {
1897 if (errno == ECONNREFUSED)
1898 status = ECONNREFUSED;
1899 else
1900 status = h_errno;
1901
1902#ifdef FIL__
1903 sh_error_handle (SH_ERR_ALL, FIL__, __LINE__, status, MSG_E_SUBGEN,
1904 (errno == ECONNREFUSED) ?
1905 sh_error_message (status, errbuf, sizeof(errbuf)) :
1906 sh_tools_errmessage(status, errbuf, sizeof(errbuf)),
1907 _("res_query"));
1908#else
1909 if (errno == ECONNREFUSED)
1910 fprintf(stderr, " ERROR: %s: \n", strerror(errno)); /* TESTONLY */
1911 else
1912 fprintf(stderr, "HERROR: %s\n", hstrerror(h_errno));/* TESTONLY */
1913#endif
1914 }
1915 SL_RETURN (NULL, _("get_mx"));
1916 }
1917
1918 ret = 0;
1919 header = (HEADER *) &reply;
1920
1921 /* start of data section
1922 */
1923 comp_dn = (unsigned char *) &reply + HFIXEDSZ;
1924
1925 /* end-of-message
1926 */
1927 eom = (unsigned char *) &reply + length;
1928
1929 /* HEADER NAME -- must be skipped or decompressed
1930 * TYPE -- type of data we got back, 16 bit integer
1931 * CLASS -- class we got back, also a 16 bit integer
1932 * TTL -- 32 bit time-to-live. just skip this
1933 * RDLENGTH -- length of the data to follow
1934 * RDATA -- the data:
1935 * PREF -- 16 bit preference
1936 * MX -- name of mail exchanger, must be decompressed
1937 */
1938
1939 /* Skip the query data.
1940 * QDCOUNT is the number of entries (unsigned 16 bit int).
1941 */
1942 count = ntohs (header->qdcount);
1943 for (index = 0; index < count; ++index)
1944 {
1945 ret = dn_skipname (comp_dn, eom);
1946 comp_dn += ret + QFIXEDSZ;
1947 if (ret < 1 || comp_dn >= eom)
1948 SL_RETURN (NULL, _("get_mx"));
1949 }
1950 count = ntohs (header->ancount);
1951 if (count < 1)
1952 SL_RETURN (NULL, _("get_mx"));
1953
1954 retval = SH_ALLOC (sizeof (dnsrep));
1955 if (!retval)
1956 SL_RETURN (NULL, _("get_mx"));
1957 retval->count = count;
1958
1959 /* allocate space for the results */
1960
1961 if (!sl_ok_muls(count, sizeof (mx)))
1962 {
1963 SH_FREE (retval);
1964 SL_RETURN (NULL, _("get_mx"));
1965 }
1966
1967 result = SH_ALLOC (count * sizeof (mx));
1968
1969 if (!result)
1970 {
1971 SH_FREE (retval);
1972 SL_RETURN (NULL, _("get_mx"));
1973 }
1974 retval->reply = result;
1975
1976 do
1977 {
1978 /* HEADER NAME
1979 */
1980 ret = dn_expand ((unsigned char *) &reply, eom, comp_dn,
1981 (char *) expanded, 1023);
1982 comp_dn += ret;
1983 if (ret < 1 || comp_dn >= eom)
1984 {
1985 SH_FREE (result);
1986 SH_FREE (retval);
1987 SL_RETURN (NULL, _("get_mx"));
1988 }
1989
1990 /* TYPE
1991 */
1992 type = get_short (comp_dn);
1993 comp_dn += 2;
1994 if (type != T_MX || comp_dn >= eom)
1995 {
1996 SH_FREE (result);
1997 SH_FREE (retval);
1998 SL_RETURN (NULL, _("get_mx"));
1999 }
2000
2001 /* CLASS (re-use 'type' var)
2002 */
2003 type = get_short (comp_dn);
2004 comp_dn += 2;
2005 if (comp_dn >= eom)
2006 {
2007 SH_FREE (result);
2008 SH_FREE (retval);
2009 SL_RETURN (NULL, _("get_mx"));
2010 }
2011
2012 /* TTL
2013 */
2014 comp_dn += 4;
2015 if (comp_dn >= eom)
2016 {
2017 SH_FREE (result);
2018 SH_FREE (retval);
2019 SL_RETURN (NULL, _("get_mx"));
2020 }
2021
2022 /* RDLENGTH
2023 */
2024 rdlength = get_short (comp_dn);
2025 comp_dn += 2;
2026 if (rdlength < 1 || comp_dn >= eom)
2027 {
2028 SH_FREE (result);
2029 SH_FREE (retval);
2030 SL_RETURN (NULL, _("get_mx"));
2031 }
2032
2033 /* RDATA
2034 */
2035 pref = get_short (comp_dn);
2036 comp_dn += 2;
2037 if (comp_dn >= eom)
2038 {
2039 SH_FREE (result);
2040 SH_FREE (retval);
2041 SL_RETURN (NULL, _("get_mx"));
2042 }
2043
2044 ret = dn_expand ((unsigned char *) &reply, eom, comp_dn,
2045 (char *) expanded, 1023);
2046 comp_dn += ret;
2047 if (ret < 1)
2048 {
2049 SH_FREE (result);
2050 SH_FREE (retval);
2051 SL_RETURN (NULL, _("get_mx"));
2052 }
2053 count--;
2054
2055 /* fill in the struct
2056 */
2057 result[count].pref = pref;
2058 len = strlen (expanded) + 1;
2059 result[count].address = SH_ALLOC (len);
2060 sl_strlcpy (result[count].address, expanded, len);
2061 }
2062 while (ret > 0 && comp_dn < eom && count);
2063
2064 SL_RETURN (retval, _("get_mx"));
2065}
2066/* ifndef S_SPLINT_S */
2067#endif
2068
2069/* #if defined(HAVE_ARPA_NAMESER_H) */
2070#endif
2071
2072
2073static int comp_mx_pref (const void * a, const void * b)
2074{
2075 const mx * ax = (const mx *) a;
2076 const mx * bx = (const mx *) b;
2077
2078 if (ax->pref > bx->pref)
2079 return 1;
2080 else if (ax->pref < bx->pref)
2081 return -1;
2082 else
2083 return 0;
2084}
2085
2086/*
2087 * return_mx returns a list of valid mail exchangers for domain
2088 */
2089static dnsrep * return_mx (char *domain)
2090{
2091 struct hostent *host = NULL;
2092 dnsrep * answers = NULL;
2093 mx * result;
2094 dnsrep * retval;
2095 char errmsg[128];
2096 size_t len;
2097
2098 SL_ENTER(_("return_mx"));
2099
2100#if defined(HAVE_ARPA_NAMESER_H)
2101 if (domain != NULL)
2102 answers = /*@-unrecog@*/get_mx (domain)/*@+unrecog@*/;
2103#endif
2104
2105 if (answers != NULL && answers->count > 0)
2106 {
2107 qsort(answers->reply, (size_t) answers->count, sizeof(mx),
2108 comp_mx_pref);
2109 SL_RETURN (answers, _("return_mx"));
2110 }
2111 else
2112 {
2113 if (domain != NULL)
2114 {
2115#if defined(HAVE_ARPA_NAMESER_H)
2116#ifdef FIL__
2117 (void) sl_strlcpy (errmsg, _("No MX record for domain "), 127);
2118 (void) sl_strlcat (errmsg, domain, 127);
2119 sh_error_handle (SH_ERR_ALL, FIL__, __LINE__, 0, MSG_E_SUBGEN,
2120 errmsg,
2121 _("get_mx"));
2122#else
2123 /* flawfinder: ignore *//* test code only */
2124 strcpy (errmsg, /* known to fit */
2125 _("No MX record for domain "));
2126 strncat (errmsg, domain, 100);
2127 errmsg[122] = '\0';
2128 fprintf(stderr, "Warning: %s\n", errmsg);
2129#endif
2130#endif
2131 }
2132 if (domain != NULL)
2133 host = /*@-unrecog@*/sh_gethostbyname (domain)/*@+unrecog@*/;
2134 if (!host)
2135 {
2136#ifdef FIL__
2137 (void) sl_strlcpy (errmsg, _("Unknown host "), 127);
2138 (void) sl_strlcat (errmsg, domain, 127);
2139 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_E_SUBGEN,
2140 errmsg,
2141 _("return_mx"));
2142#endif
2143 SL_RETURN (NULL, _("return_mx"));
2144 }
2145 result = SH_ALLOC (sizeof (mx));
2146 retval = SH_ALLOC (sizeof (dnsrep));
2147 retval->reply = result;
2148 retval->count = 1;
2149 result->pref = 0;
2150 /*@-type@*/
2151 len = strlen (host->h_name) + 1;
2152 result->address = SH_ALLOC (len);
2153 sl_strlcpy (result->address, host->h_name, len);
2154 /*@+type@*/
2155 SL_RETURN (retval, _("return_mx"));
2156 }
2157}
2158
2159static int free_mx (dnsrep * answers)
2160{
2161 mx * result;
2162 int i;
2163
2164 SL_ENTER(_("free_mx"));
2165 if (!answers)
2166 SL_RETURN (0, _("return_mx"));
2167
2168 result = answers->reply;
2169 for (i = 0; i < answers->count; ++i)
2170 {
2171 SH_FREE (result[i].address);
2172 }
2173 SH_FREE(result);
2174 SH_FREE(answers);
2175 SL_RETURN (0, _("return_mx"));
2176}
2177
2178#ifdef TEST_ONLY
2179int main(int argc, char * argv[])
2180{
2181 int i;
2182 dnsrep * answers;
2183 mx * result;
2184
2185 if (argc < 2)
2186 {
2187 fprintf(stderr, "Usage: dns <hostname>\n");
2188 return -1;
2189 }
2190 answers = return_mx(argv[1]);
2191
2192 if (!answers)
2193 {
2194 fprintf(stderr, "No answer\n");
2195 return -1;
2196 }
2197
2198 if (answers->count > 0)
2199 {
2200 result = answers->reply;
2201 for (i = 0; i < answers->count; ++i)
2202 {
2203 fprintf(stderr, "Record %3d: [%3d] %s\n", i,
2204 result[i].pref, result[i].address);
2205 }
2206 }
2207 else
2208 {
2209 fprintf(stderr, "No answer\n");
2210 free_mx(answers);
2211 return -1;
2212 }
2213 free_mx(answers);
2214 return (0);
2215}
2216#endif
2217
2218
2219
2220/* if defined(SH_WITH_MAIL) */
2221#endif
2222
2223
2224
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