-
Notifications
You must be signed in to change notification settings - Fork 6
/
custom-smtp-cli
1137 lines (1007 loc) · 36.1 KB
/
custom-smtp-cli
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
#!/usr/bin/perl
#
# Command line SMTP client with SSL, STARTTLS, SMTP-AUTH and IPv6 support.
# Michal Ludvig, 2003-2019
# See http://smtp-cli.logix.cz for details
# and https://github.com/mludvig/smtp-cli for code.
# Thanks to all contributors for ideas and fixes!
#
my $version = "3.10";
#
# ChangeLog:
# * Version 3.10 (2019-10-16)
# - Use DNS for MX resolution when no --server is given
#
# * Version 3.9 (2018-04-06)
# - Don't attempt to use IO::Socket::INET6 with --ipv4.
#
# * Version 3.8 (2017-07-05)
# - New parameter --local-addr
# - Support body and attachment reading from non-regular files
# - Various protocol fixes
#
# * Version 3.7 (2014-11-21)
# - Support STDIN input with --body-plain=- or --body-html=-
#
# * Version 3.6 (2013-07-11)
# - Improved compatibility with perl < 5.10 and perl >= 5.18
# - Added support for more chars in user-part of email address.
#
# * Version 3.5 (2013-05-08)
# - Improved compliance with SMTP RFC 5321
# - New parameter --text-encoding
#
# * Version 3.4 (2013-02-05)
# - Ok, ok, support both File::Type and File::LibMagic
#
# * Version 3.3 (2012-07-30)
# - Moved from File::Type to File::LibMagic
# (File::Type is no longer maintained and not available
# in EPEL for RHEL 6)
#
# * Version 3.2 (2012-06-26)
# - Fixed syntax error
#
# * Version 3.1 (2012-06-25)
# - New --add-header, --replace-header and --remove-header options.
# - Improved compatibility with new IO::Socket::SSL releases.
#
# * Version 3.0 (2012-01-24)
# - Support for server SSL verification agains CA root cert.
# - Use "Content-Disposition: attachment" for all attachments
# unless --attach-inline was used.
# - No longer default to --server=localhost
# - Support for --charset=<charset> affecting all text/* parts.
# - Ensure "To: undisclosed-recipients:;" if sending only to Bcc.
#
# * Version 2.9 (2011-09-02)
# - Fixed problem when using IPv6 addresses with --server.
# For example with --server 2001:db8::123 it was connecting
# to server 2001:db8:: port 123. Fixed now.
#
# * Version 2.8 (2011-01-05)
# - Added --ssl to support for SSMTP (SMTP over SSL). This is
# turned on by default when --port=465.
#
# * Version 2.7 (2010-09-08)
# - Added support for Cc header (--cc=...)
# - Addressess (From, To, Cc) can now contain a "display name",
# for example --from="Michal Ludvig <[email protected]>"
# - Support for --mail-from and --rcpt-to addresses independent
# on --from, --to, --cc and --bcc
# - Fixed warnings in Perl 5.12
#
# * Version 2.6 (2009-08-05)
# - Message building fixed for plaintext+attachment case.
# - Auto-enable AUTH as soon as --user parameter is used.
# (previously --enable-auth or --auth-plain had to be used
# together with --user, that was confusing).
# - New --print-only parameter for displaying the composed
# MIME message without sending.
# - All(?) non-standard modules are now optional.
# - Displays local and remote address on successfull connect.
#
# * Version 2.5 (2009-07-21)
# - IPv6 support provided the required modules are
# available.
#
# * Version 2.1 (2008-12-08)
# - Make the MIME modules optional. Simply disable
# the required functionality if they're not available.
#
# * Version 2.0 (2008-11-18)
# - Support for message building through MIME::Lite,
# including attachments, multipart, etc.
#
# * Version 1.1 (2006-08-26)
# - STARTTLS and AUTH support
#
# * Version 1.0
# - First public version
#
# This program is licensed under GNU Public License v3 (GPLv3)
#
## Require Perl 5.8 or higher -> we need open(.., .., \$variable) construct
require 5.008;
use strict;
use IO::Socket::INET;
use MIME::Base64 qw(encode_base64 decode_base64);
use Getopt::Long;
use Socket qw(:DEFAULT :crlf);
use POSIX;
use Term::ANSIColor;
use strict;
my @valid_encodings = ("7bit", "8bit", "binary", "base64", "quoted-printable");
my ($user, $pass, $host, $port, $addr_family, $localaddr,
$use_login, $use_plain, $use_cram_md5,
$ehlo_ok, $auth_ok, $starttls_ok, $ssl, $verbose,
$hello_host, $datasrc,
$mail_from, @rcpt_to, $from, @to, @cc, @bcc,
$missing_modules_ok, $missing_modules_count,
$subject, $body_plain, $body_html, $charset, $text_encoding, $print_only,
@attachments, @attachments_inline,
@add_headers, @replace_headers, @remove_headers,
$ssl_ca_file, $ssl_ca_path,
$sock, $built_message);
$host = undef;
$port = 'smtp(25)';
$addr_family = AF_UNSPEC;
$localaddr = undef;
$hello_host = 'localhost';
$verbose = 0;
$use_login = 0;
$use_plain = 0;
$use_cram_md5 = 0;
$starttls_ok = 1;
$ssl = undef;
$auth_ok = 0;
$ehlo_ok = 1;
$missing_modules_ok = 0;
$missing_modules_count = 0;
$charset = undef;
$text_encoding = "quoted-printable";
$print_only = 0;
# Get command line options.
GetOptions (
'host|server=s' => \$host,
'port=i' => \$port,
'4|ipv4' => sub { $addr_family = AF_INET; },
'6|ipv6' => sub { $addr_family = AF_INET6; },
'local-addr=s' => \$localaddr,
'user=s' => \$user, 'password=s' => \$pass,
'auth-login' => \$use_login,
'auth-plain' => \$use_plain,
'auth-cram-md5' => \$use_cram_md5,
'disable-ehlo' => sub { $ehlo_ok = 0; },
'force-ehlo' => sub { $ehlo_ok = 2; },
'hello-host|ehlo-host|helo-host=s' => \$hello_host,
'auth|enable-auth' => \$auth_ok,
'disable-starttls|disable-tls|disable-ssl' =>
sub { $starttls_ok = 0; },
'ssl' => sub { $ssl = 1 },
'disable-ssl' => sub { $ssl = 0 },
'mail-from=s' => \$mail_from,
'rcpt-to=s' => \@rcpt_to,
'from=s' => \$from,
'to=s' => \@to,
'cc=s' => \@cc,
'bcc=s' => \@bcc,
'data=s' => \$datasrc,
'subject=s' => \$subject,
'body|body-plain=s' => \$body_plain,
'body-html=s' => \$body_html,
'charset=s' => \$charset,
'text-encoding=s' => \$text_encoding,
'attachment|attach=s' => \@attachments,
'attachment-inline|attach-inline=s' => \@attachments_inline,
'add-header=s' => \@add_headers,
'replace-header=s' => \@replace_headers,
'remove-header=s' => \@remove_headers,
'print-only' => \$print_only,
'missing-modules-ok' => \$missing_modules_ok,
'ssl-ca-file=s' => \$ssl_ca_file,
'ssl-ca-path=s' => \$ssl_ca_path,
'v|verbose+' => \$verbose,
'version' => sub { &version() },
'help' => sub { &usage() } );
#### Try to load optional modules
## IO::Socket::SSL and Net::SSLeay are optional
my $have_ssl = eval { require IO::Socket::SSL; require Net::SSLeay; 1; };
if (not $have_ssl and not $missing_modules_ok) {
warn("!!! IO::Socket::SSL and/or Net::SSLeay modules are not found\n");
warn("!!! These modules are required for SSL and STARTTLS support\n");
$missing_modules_count += 2;
}
## IO::Socket::INET6 and Socket6 are optional
my $socket6 = eval { require IO::Socket::INET6; require Socket6; 1; };
if (not $socket6 and not ($addr_family == AF_INET)) {
if ($addr_family == AF_INET6) {
die("!!! IO::Socket::INET6 and Socket6 modules are not found\nIPv6 support is not available\n");
}
if (not $missing_modules_ok) {
warn("!!! IO::Socket::INET6 -- optional module not found\n");
warn("!!! Socket6 -- optional module not found\n");
warn("!!! These modules are required for IPv6 support\n\n");
$missing_modules_count += 2;
}
}
## MIME::Lite dependency is optional
my $mime_lite = eval { require MIME::Lite; 1; };
if (not $mime_lite and not $missing_modules_ok) {
warn("!!! MIME::Lite -- optional module not found\n");
warn("!!! Used for composing messages from --subject, --body, --attachment, etc.\n\n");
$missing_modules_count++;
}
## File::LibMagic dependency is optional
my $file_libmagic = eval { require File::LibMagic; File::LibMagic->new(); };
## File::Type dependency is optional
## Not needed if File::LibMagic is available
my $file_type = eval { require File::Type; File::Type->new(); };
if (not $file_libmagic and not $file_type and not $missing_modules_ok) {
warn("!!! Neither File::LibMagic nor File::Type module found.\n");
warn("!!! Used for guessing MIME types of attachments. Optional.\n\n");
$missing_modules_count++;
}
## Term::ReadKey dependency is optional
my $have_term_readkey = eval { require Term::ReadKey; 1; };
if (not $have_term_readkey and not $missing_modules_ok) {
warn("!!! Term::ReadKey -- optional module not found\n");
warn("!!! Used for hidden reading SMTP password from the terminal\n\n");
$missing_modules_count++;
}
my $have_hmac_md5 = eval { require Digest::HMAC_MD5; 1; };
if (not $have_hmac_md5 and not $missing_modules_ok) {
if ($use_cram_md5) {
die("!!! CRAM-MD5 authentication is not available because Digest::HMAC_MD5 module is missing\n");
}
warn("!!! Digest::HMAC_MD5 -- optional module missing\n");
warn("!!! Used for CRAM-MD5 authentication method\n");
$missing_modules_count++;
}
my $have_dns = eval { require Net::DNS; 1; };
if (not $have_dns and not $missing_modules_ok) {
warn("!!! Net::DNS -- optional module not found\n");
warn("!!! Used for resolving recipient MX record\n");
$missing_modules_count++;
}
## Advise about --missing-modules-ok parameter
if ($missing_modules_count) {
warn("!!! Use --missing-modules-ok if you don't need the above listed modules\n");
warn("!!! and don't want to see this message again.\n\n");
}
## Make sure the --text-encoding value is valid
if (not grep(/^$text_encoding$/, @valid_encodings))
{
die ("The --text-encoding value is invalid: $text_encoding\nMust be one of: " . join(', ', @valid_encodings) . "\n");
}
# Extract $mail_from address from $from
if (not defined($mail_from) and defined($from)) {
$mail_from = &find_email_addr($from) or
die ("The --from string does not contain a valid email address: $from\n");
}
# Extract @rcpt_to list from @to, @cc and @bcc
if (not @rcpt_to) {
foreach my $rcpt (@to, @cc, @bcc) {
my $rcpt_addr = &find_email_addr($rcpt);
if (not defined($rcpt_addr)) {
warn("No valid email address found in: $rcpt\n");
next;
}
push(@rcpt_to, $rcpt_addr);
}
}
# Ensure "To: undisclosed-recipients:;" when sending only to Bcc's
if (not @to and not @cc) {
push(@to, "undisclosed-recipients:;");
}
## Make sure we've got a server name to connect to
if (not defined($host)) {
if ($print_only) {
# We're printing to stdout only, let's assign just about any
# hostname to satisfy the next few tests.
$host = "localhost";
} elsif ($have_dns) {
my @rcpt0 = split(/@/, $rcpt_to[0]);
my $rcpt0_domain = $rcpt0[1];
my $res = Net::DNS::Resolver->new;
my @mx = Net::DNS::mx($res, $rcpt0_domain);
#my @mx = $res->mx($rcpt_to[0]);
if (@mx) {
$host = $mx[0]->exchange;
print("Resolved MX for $rcpt_to[0]: $host\n");
}
}
# If still not defined...
if (not defined($host)) {
die("Error: Specify the SMTP server with --server=hostname[:port]\n");
}
}
## Accept hostname with port number as host:port
## Either it's a hostname:port or 1.2.3.4:port or [2001:db8::1]:port.
## Don't parse 2001:db8::1 as $host=2001:db8:: and $port=1!
if (($host =~ /^([^:]+):([:alnum:]+)$/) or
($host =~ /^\[([[:xdigit:]:]+)\]:([:alnum:]+)$/))
{
$host = $1;
$port = $2;
}
## Automatically start in SSL mode if port == 465 (SSMTP)
if (not defined($ssl)) {
$ssl = ($port == 465);
}
# Build the MIME message if required
if (defined($subject) or defined($body_plain) or defined($body_html) or
@attachments or @attachments_inline) {
if (not $mime_lite) {
die("Module MIME::Lite is not available. Unable to build the message, sorry.\n".
"Use --data and provide a complete email payload including headers instead.\n");
}
if (defined($datasrc)) {
die("Requested building a message and at the same time used --data parameter.\n".
"That's not possible, sorry.\n");
}
if (defined($body_plain)) {
if (-e $body_plain) {
local $/=undef;
open(FILE, $body_plain);
$body_plain = <FILE>;
close(FILE);
} elsif ($body_plain eq "-") {
local $/=undef;
$body_plain = <STDIN>;
}
}
if (defined($body_html)) {
if (-e $body_html) {
local $/=undef;
open(FILE, $body_html);
$body_html = <FILE>;
close(FILE);
} elsif ($body_html eq "-") {
local $/=undef;
$body_html = <STDIN>;
}
}
my $message = &build_message();
open(BUILT_MESSAGE, "+>", \$built_message);
$datasrc = "///built_message";
if ($print_only) {
$message->print();
exit(0);
} else {
$message->print(\*BUILT_MESSAGE);
}
seek(BUILT_MESSAGE, 0, 0);
}
# Username was given -> enable AUTH
if ($user)
{ $auth_ok = 1; }
# If at least one --auth-* option was given, enable AUTH.
if ($use_login + $use_plain + $use_cram_md5 > 0)
{ $auth_ok = 1; }
# If --enable-auth was given, enable all AUTH methods.
elsif ($auth_ok && ($use_login + $use_plain + $use_cram_md5 == 0))
{
$use_login = 1;
$use_plain = 1;
$use_cram_md5 = 1 if ($have_hmac_md5);
}
# Exit if user haven't specified username for AUTH.
if ($auth_ok && !defined ($user))
{ die ("SMTP AUTH support requested without --user\n"); }
# Ask for password if it wasn't supplied on the command line.
if ($auth_ok && defined ($user) && !defined ($pass))
{
if ($have_term_readkey) {
# Set echo off.
Term::ReadKey::ReadMode (2);
} else {
warn ("Module Term::ReadKey not available - password WILL NOT be hidden!!!\n");
}
printf ("Enter password for %s@%s : ", $user, $host);
$pass = <>;
if ($have_term_readkey) {
# Restore echo.
Term::ReadKey::ReadMode (0);
printf ("\n");
}
exit if (! defined ($pass));
chop ($pass);
}
# Connect to the SMTP server.
my %connect_args = (
PeerAddr => $host,
PeerPort => $port,
Proto => 'tcp',
Timeout => 5);
if (defined($localaddr)) {
$connect_args{'LocalAddr'} = $localaddr;
}
if ($addr_family == AF_INET) {
# If the user requested --ipv4 don't even bother with INET6 module
# (although it should work some users reported problems)
$sock = IO::Socket::INET->new(%connect_args) or die ("Connect failed: $@\n");
} else {
# Either --ipv6 or no preference - do the best we can
$connect_args{'Domain'} = $addr_family;
$sock = IO::Socket::INET6->new(%connect_args) or die ("Connect failed: $@\n");
}
if ($verbose >= 1) {
my $addr_fmt = "%s";
$addr_fmt = "[%s]" if ($sock->sockhost() =~ /:/); ## IPv6 connection
printf ("Connection from $addr_fmt:%s to $addr_fmt:%s\n",
$sock->sockhost(), $sock->sockport(),
$sock->peerhost(), $sock->peerport());
}
if ($ssl) {
printf ("Starting SMTP/SSL...\n") if ($verbose >= 1);
&socket_to_ssl($sock);
}
my ($code, $text);
my (%features);
# Wait for the welcome message of the server.
($code, $text) = &get_line ($sock);
die ("Unknown welcome string: '$code $text'\n") if ($code != 220);
$ehlo_ok-- if ($text !~ /ESMTP/);
# Send EHLO
&say_hello ($sock, $ehlo_ok, $hello_host, \%features) or exit (1);
# Run the SMTP session
my $exitcode = &run_smtp ();
# Good bye...
&send_line ($sock, "QUIT\n");
($code, $text) = &get_line ($sock);
die ("Unknown QUIT response '$code'.\n") if ($code != 221);
exit $exitcode;
# This is the main SMTP "engine".
sub run_smtp
{
# See if we could start encryption
if ((defined ($features{'STARTTLS'}) || defined ($features{'TLS'})) && $starttls_ok && !$have_ssl)
{
warn ("Module IO::Socket::SSL is missing - STARTTLS support disabled.\n");
warn ("Use --disable-starttls or install the modules to avoid this warning.\n");
undef ($features{'STARTTLS'});
undef ($features{'TLS'});
}
if ((defined ($features{'STARTTLS'}) || defined ($features{'TLS'})) && $starttls_ok)
{
printf ("Starting TLS...\n") if ($verbose >= 1);
&send_line ($sock, "STARTTLS\n");
($code, $text) = &get_line ($sock);
die ("Unknown STARTTLS response '$code'.\n") if ($code != 220);
&socket_to_ssl($sock);
# Send EHLO again (required by the SMTP standard).
&say_hello ($sock, $ehlo_ok, $hello_host, \%features) or return 0;
}
# See if we should authenticate ourself
if (defined ($features{'AUTH'}) && $auth_ok)
{
printf ("AUTH method (%s): ", $features{'AUTH'}) if ($verbose >= 1);
## Try DIGEST-MD5 first
# Actually we won't. It never worked reliably here.
# After all DIGEST-MD5 is on a way to deprecation
# see this thread: http://www.imc.org/ietf-sasl/mail-archive/msg02996.html
# Instead use CRAM-MD5 if supported by the server
if ($features{'AUTH'} =~ /CRAM-MD5/i && $use_cram_md5)
{
printf ("using CRAM-MD5\n") if ($verbose >= 1);
&send_line ($sock, "AUTH CRAM-MD5\n");
($code, $text) = &get_line ($sock);
if ($code != 334)
{ die ("AUTH CRAM-MD5 failed: $code $text\n"); }
my $response = &encode_cram_md5 ($text, $user, $pass);
&send_line ($sock, "%s\n", $response);
($code, $text) = &get_line ($sock);
if ($code != 235)
{ die ("AUTH CRAM-MD5 failed: $code $text\n"); }
}
# Eventually try LOGIN method
elsif ($features{'AUTH'} =~ /LOGIN/i && $use_login)
{
printf ("using LOGIN\n") if ($verbose >= 1);
&send_line ($sock, "AUTH LOGIN\n");
($code, $text) = &get_line ($sock);
if ($code != 334)
{ die ("AUTH LOGIN failed: $code $text\n"); }
&send_line ($sock, "%s\n", encode_base64 ($user, ""));
($code, $text) = &get_line ($sock);
if ($code != 334)
{ die ("AUTH LOGIN failed: $code $text\n"); }
&send_line ($sock, "%s\n", encode_base64 ($pass, ""));
($code, $text) = &get_line ($sock);
if ($code != 235)
{ die ("AUTH LOGIN failed: $code $text\n"); }
}
# Or finally PLAIN if nothing else was supported.
elsif ($features{'AUTH'} =~ /PLAIN/i && $use_plain)
{
printf ("using PLAIN\n") if ($verbose >= 1);
&send_line ($sock, "AUTH PLAIN %s\n",
encode_base64 ("$user\0$user\0$pass", ""));
($code, $text) = &get_line ($sock);
if ($code != 235)
{ die ("AUTH PLAIN failed: $code $text\n"); }
}
# Complain otherwise.
else
{
warn ("No supported authentication method\n".
"advertised by the server.\n");
return 1;
}
printf ("Authentication of $user\@$host succeeded\n") if ($verbose >= 1);
}
# We can do a relay-test now if a recipient was set.
if ($#rcpt_to >= 0)
{
if (!defined ($mail_from))
{
warn ("From: address not set. Using empty one.\n");
$mail_from = "";
}
&send_line ($sock, "MAIL FROM:<%s>\n", $mail_from);
($code, $text) = &get_line ($sock);
if ($code != 250)
{
#warn ("MAIL FROM <$mail_from> failed: '$code $text'\n");
#printf ("<$mail_from> user is invalid: '$code $text'\n");
#print colored( sprintf("$mail_from: user is invalid '$code $text'\n"), 'red' );
print (POSIX::strftime( "%B %d, %Y %X", localtime())." : ".colored( sprintf("$mail_from: user is invalid '$code $text'\n"), 'red' ));
return 1;
}
else
{
#printf ("<$mail_from> user is valid '$code $text'\n");
#print colored( sprintf("$mail_from: user is valid '$code $text'\n"), 'yellow' );
print (POSIX::strftime( "%B %d, %Y %X", localtime())." : ".colored( sprintf("$mail_from: user is valid '$code $text'\n"), 'yellow' ));
}
my $i;
for ($i=0; $i <= $#rcpt_to; $i++)
{
&send_line ($sock, "RCPT TO:<%s>\n", $rcpt_to[$i]);
($code, $text) = &get_line ($sock);
if ($code != 250)
{
#warn ("RCPT TO <".$rcpt_to[$i]."> ".
# "failed: '$code $text'\n");
#printf ("<%s> user is invalid '$code $text'\n",$rcpt_to[$i]);
#print colored( sprintf("%s: user is invalid '$code $text'\n", $rcpt_to[$i]), 'red' );
print (POSIX::strftime( "%B %d, %Y %X", localtime())." : ".colored( sprintf("%s: user is invalid '$code $text'\n", $rcpt_to[$i]), 'red' ));
return 0;
}
else
{
#printf ("<%s> user is valid '$code $text'\n",$rcpt_to[$i]);
#print POSIX::strftime( "%A, %B %d, %Y %X", localtime());
#print colored( sprintf("%s: user is valid '$code $text'\n", $rcpt_to[$i]), 'green' );
print (POSIX::strftime( "%B %d, %Y %X", localtime())." : ".colored( sprintf("%s: user is valid '$code $text'\n", $rcpt_to[$i]), 'green' ))
}
}
}
# Wow, we should even send something!
if (defined ($datasrc))
{
if ($datasrc eq "///built_message")
{
*MAIL = *BUILT_MESSAGE;
}
elsif ($datasrc eq "-")
{
*MAIL = *STDIN;
}
elsif (!open (MAIL, $datasrc))
{
warn ("Can't open file '$datasrc'\n");
return 0;
}
&send_line ($sock, "DATA\n");
($code, $text) = &get_line ($sock);
if ($code != 354)
{
warn ("DATA failed: '$code $text'\n");
return 0;
}
while (<MAIL>)
{
my $line = $_;
# RFC 5321 section 4.5.2 - leading dot must be doubled
$line =~ s/^\./\.\./;
# RFC 5321 section 2.3.8 - ensure CR-LF line ending
$line =~ s/[\r\n]+$/$CRLF/;
$sock->print ($line);
}
close (MAIL);
$sock->printf ("$CRLF.$CRLF");
($code, $text) = &get_line ($sock);
if ($code != 250)
{
#warn ("DATA not send: '$code $text'\n");
#print ("Email Delivery Failed: '$code $text'\n");
#print colored( sprintf("Email Delivery Failed: '$code $text'\n"), 'red' );
print (POSIX::strftime( "%B %d, %Y %X", localtime())." : ".colored( sprintf("Email Delivery Failed: '$code $text'\n"), 'red' ));
return 0;
}
else
{
#print ("Email Delivery Successful: '$code $text'\n");
#print colored( sprintf("Email Delivery Successful: '$code $text'\n"), 'magenta' );
print (POSIX::strftime( "%B %d, %Y %X", localtime())." : ".colored( sprintf("Email Delivery Successful: '$code $text'\n"), 'magenta' ));
}
}
# Perfect. Everything succeeded!
return 1;
}
# Get one line of response from the server.
sub get_one_line ($)
{
my $sock = shift;
my ($code, $sep, $text) = ($sock->getline() =~ /(\d+)(.)([^\r]*)/);
my $more;
$more = ($sep eq "-");
if ($verbose)
{ printf ("[%d] '%s'\n", $code, $text); }
return ($code, $text, $more);
}
# Get concatenated lines of response from the server.
sub get_line ($)
{
my $sock = shift;
my ($code, $text, $more) = &get_one_line ($sock);
while ($more) {
my ($code2, $line);
($code2, $line, $more) = &get_one_line ($sock);
$text .= " $line";
die ("Error code changed from $code to $code2. That's illegal.\n") if ($code ne $code2);
}
return ($code, $text);
}
# Send one line back to the server
sub send_line ($@)
{
my $socket = shift;
my @args = @_;
if ($verbose)
{ printf ("> "); printf (@args); }
$args[0] =~ s/\n/$CRLF/g;
$socket->printf (@args);
}
sub socket_to_ssl($)
{
if (!$have_ssl) {
die ("SSL/TLS support is not available due to missing modules. Sorry.\n");
}
# Do Net::SSLeay initialization
Net::SSLeay::load_error_strings();
Net::SSLeay::SSLeay_add_ssl_algorithms();
Net::SSLeay::randomize();
if (! IO::Socket::SSL->start_SSL($sock, {
SSL_ca_file => $ssl_ca_file,
SSL_ca_path => $ssl_ca_path,
SSL_verify_mode => (defined($ssl_ca_file) or defined($ssl_ca_path)) ? 0x01 : 0x00,
}))
{
die ("SSL/TLS: ".IO::Socket::SSL::errstr()."\n");
}
if ($verbose >= 1)
{
printf ("Using cipher: %s\n", $sock->get_cipher ());
printf ("%s", $sock->dump_peer_certificate());
}
}
# Helper function to encode CRAM-MD5 challenge
sub encode_cram_md5 ($$$)
{
my ($ticket64, $username, $password) = @_;
my $ticket = decode_base64($ticket64) or
die ("Unable to decode Base64 encoded string '$ticket64'\n");
print "Decoded CRAM-MD5 challenge: $ticket\n" if ($verbose > 1);
my $password_md5 = Digest::HMAC_MD5::hmac_md5_hex($ticket, $password);
return encode_base64 ("$username $password_md5", "");
}
# Store all server's ESMTP features to a hash.
sub say_hello ($$$$)
{
my ($sock, $ehlo_ok, $hello_host, $featref) = @_;
my ($feat, $param);
my $hello_cmd = $ehlo_ok > 0 ? "EHLO" : "HELO";
&send_line ($sock, "$hello_cmd $hello_host\n");
my ($code, $text, $more) = &get_one_line ($sock);
if ($code != 250)
{
warn ("$hello_cmd failed: '$code $text'\n");
return 0;
}
# Empty the hash
%{$featref} = ();
($feat, $param) = ($text =~ /^(\w+)[= ]*(.*)$/);
$featref->{$feat} = $param;
# Load all features presented by the server into the hash
while ($more == 1)
{
($code, $text, $more) = &get_one_line ($sock);
($feat, $param) = ($text =~ /^(\w+)[= ]*(.*)$/);
$featref->{$feat} = $param;
}
return 1;
}
sub find_email_addr($)
{
my $addr = shift;
if ($addr =~ /([A-Z0-9._%=#+-]+@(?:[A-Z0-9-]+\.)+[A-Z]+)\b/i) {
return $1;
}
return undef;
}
sub guess_mime_type($)
{
my $filename = shift;
if (defined($file_libmagic)) {
## Use File::LibMagic if possible
return $file_libmagic->checktype_filename($filename);
} elsif (defined($file_type)) {
## Use File::Type if possible
return $file_type->mime_type($filename);
} else {
## Module File::LibMagic is not available
## Still recognise some common extensions
return "image/jpeg" if ($filename =~ /\.jpe?g/i);
return "image/gif" if ($filename =~ /\.gif/i);
return "image/png" if ($filename =~ /\.png/i);
return "text/plain" if ($filename =~ /\.txt/i);
return "application/zip" if ($filename =~ /\.zip/i);
return "application/x-gzip" if ($filename =~ /\.t?gz/i);
return "application/x-bzip" if ($filename =~ /\.t?bz2?/i);
}
return "application/octet-stream";
}
sub basename($)
{
my $path = shift;
my @parts = split(/\//, $path);
return $parts[$#parts];
}
sub prepare_attachment($)
{
my $attachment = shift;
my ($path, $mime_type);
if (-e $attachment) {
$path = $attachment;
$mime_type = guess_mime_type($attachment);
} elsif ($attachment =~ /(.*)@([^@]*)$/ and -e $1) {
$path = $1;
$mime_type = $2;
}
return ($path, $mime_type);
}
sub attach_attachments($$@)
{
my $message = shift;
my $disposition = shift;
my @attachments = @_;
foreach my $attachment (@attachments) {
my ($path, $mime_type) = prepare_attachment($attachment);
if (not defined($path)) {
#warn("$attachment: File not found. Ignoring.\n");
next;
}
$message->attach(
Type => $mime_type,
Path => $path,
Id => basename($path),
Disposition => $disposition,
);
}
}
sub safe_attach($$)
{
my ($message, $part) = @_;
## Remove some headers when $part is becoming a subpart of $message
$part->delete("Date");
$part->delete("X-Mailer");
$part->attr("MIME-Version" => undef);
$message->attach($part);
return $message;
}
sub mime_message($$)
{
my ($type, $data) = @_;
## Set QP encoding for text/* types, let MIME::Lite decide for all other types.
my $encoding = $type =~ /^text\// ? $text_encoding : undef;
my $message = MIME::Lite->new(
Type => $type,
Encoding=> $encoding,
Data => $data);
$message->attr('content-type.charset' => $charset) if (($type =~ /^text\//i) and defined($charset));
return $message;
}
sub build_message
{
my ($part_plain, $part_html, $part_body, $message);
if (@attachments_inline) {
if (not defined($body_html)) {
die("Inline attachments (--attach-inline) must be used with --body-html\n");
}
$part_html = MIME::Lite->new(Type => 'multipart/related');
$part_html->attach(Type => 'text/html', Data => $body_html);
attach_attachments($part_html, "inline", @attachments_inline);
$message = $part_html;
# undefine $body_html to prevent confusion in the next if()
undef($body_html);
}
if (defined($body_html)) {
$part_html = mime_message('text/html', $body_html);
$message = $part_html;
}
if (defined($body_plain)) {
$part_plain = mime_message('text/plain', $body_plain);
$message = $part_plain;
}
if (defined($part_plain) and defined($part_html)) {
$part_body = mime_message("multipart/alternative", undef);
safe_attach($part_body, $part_plain);
safe_attach($part_body, $part_html);
$message = $part_body;
}
if (@attachments) {
if (defined($message)) {
# We already have some plaintext and/or html content built
# => make it the first part of multipart/mixed
my $message_body = $message;
$message = mime_message("multipart/mixed", undef);
safe_attach($message, $message_body);
attach_attachments($message, "attachment", @attachments);
} elsif ($#attachments == 0) {
# Only one single attachment - let it be the body
my ($path, $mime_type) = prepare_attachment($attachments[0]);
if (not defined($path)) {
die($attachments[0].": File not found. No other message parts defined. Aborting.\n");
}
$message = MIME::Lite->new(
Type => $mime_type,
Path => $path);
} else {
# Message consisting only of attachments
$message = mime_message("multipart/mixed", undef);
attach_attachments($message, "attachment", @attachments);
}
}
# Last resort - empty plaintext message
if (!defined($message)) {
$message = mime_message("TEXT", "");
}
$message->replace("From" => $from);
$message->replace("To" => join(", ", @to));
$message->replace("Cc" => join(", ", @cc));
$message->replace("Subject" => $subject);
$message->replace("X-Mailer" => "smtp-cli $version, see http://smtp-cli.logix.cz");
$message->replace("Message-ID" => "<".time()."-".int(rand(999999))."\@smtp-cli>");
for my $header (@add_headers) {
my ($hdr, $val) = ($header =~ /^([^:]+):\s*(.*)$/);
die("Not a valid header format: ${header}\n") if (not $hdr or not $val);
$message->add($hdr => $val);
}
for my $header (@replace_headers) {
my ($hdr, $val) = ($header =~ /^([^:]+):\s*(.*)$/);
die("Not a valid header format: ${header}\n") if (not $hdr or not $val);
$message->replace($hdr => $val);
}
for my $header (@remove_headers) {
my ($hdr) = ($header =~ /^([^:\s]+)/);
$message->replace($header => "");
}
return $message;
}
sub version ()
{
print "smtp-cli version $version\n";
exit (0);
}
sub usage ()
{
printf (
"Simple SMTP client written in Perl that supports advanced
features like STARTTLS and SMTP-AUTH and IPv6. It can also
create messages from components (files, text snippets) and
attach files.