2 # $Id: t-prot,v 1.280 2010/02/11 11:10:47 jochen Exp $
6 use Fcntl qw(O_EXCL O_WRONLY O_CREAT);
7 use Getopt::Mixed qw(nextOption);
8 use constant VER => '2.14';
9 use constant REV => '';
10 use constant REL => q$Revision: 1.280 $=~m/(\d+(?:\.\d+)+)/;
11 # MTA expecting mail on STDIN
12 # (you might have to adjust this if using a different MTA)
13 use constant SENDMAIL => '/usr/sbin/sendmail -oi';
15 # (you might have to adjust those if your libc wants different values)
16 use constant EX_OK => 0;
17 use constant EX_USAGE => 64;
18 use constant EX_DATAERR => 65;
19 use constant EX_UNAVAILABLE => 69;
20 use constant EX_SOFTWARE => 70;
21 use constant EX_IOERR => 74;
22 use constant EX_BOUNCE => EX_UNAVAILABLE;
24 $ad $ads $bigqn $bigqx $boun $check $check_ratio $cr $diff $elli
25 $footers $ftr_ad $ftr_ml $hdrs $indent $kamm $kdiff $kminl $kmaxl
26 $lax $lsig $maxsig $maxlines $mda $ml $gw $ms $ms_smart $msg_quote
27 $msg_ratio $mua $nohdr $ofile $pgpshort $pgpmove $pgpmovevrf $sig
28 $sigint $sign $spass $spass_prefix $sysl $trad $trsp
30 $gpg_WARNING $gpg_Warning $gpg_Cantcheck $gpg_aka $gpg_bad
31 $gpg_expired $gpg_good $gpg_bug
33 $mutt_attachment $mutt_contenttype $mutt_pgpsigned $mutt_beginsigned
34 $mutt_pgpclearsigned $mutt_pgpclearsigstart $mutt_pgpencrypted
35 $mutt_pgpoutstart $mutt_pgpoutend
39 # Please adjust these vals to your needs only if you know what you are
40 # doing. They are no constants because command line can change them or
41 # they are used in some rexexp.
43 $maxsig = 4; # max. valid signature length
44 $maxlines = undef; # no limit of message lines
45 $indent = '>'; # Indent string, regexp to identify a quoted line
46 $kminl = 65; # see decomb() for details
49 $pgpshort = 0; # hide pgp key ids if set
50 $pgpmove = 0; # move pgp output to bottom if set
52 $sign = 1; # max number of sigs tolerated, undef for no limit
53 $boun = "Blocked by $0: This user does not accept TOFUed email. Please see <http://learn.to/quote/> and <http://www.escape.de/users/tolot/mutt/> for more info. Have a nice day!\n";
54 $ftr_ad = undef; # too hard on performance to be default
55 $ftr_ml = undef; # too hard on performance to be default
56 $ofile = '-'; # use STDOUT if nothing is specified
57 $spass_prefix = 'SPAM: ';
58 $check_ratio = 0; # off by default
59 $msg_quote = "Blocked by $0: This message has been rejected because of a full quote. Please see http://learn.to/quote/ and http://www.escape.de/users/tolot/mutt/ for more info. Have a nice day!\n";
60 $msg_ratio = "Blocked by $0: This message has been rejected because of excessive quoting. Please see http://learn.to/quote/ and http://www.escape.de/users/tolot/mutt/ for more info. Have a nice day!\n";
61 # end of user adjusted vals
64 # set the defaults to the C locale
65 $mutt_attachment = '[-- Attachment #';
66 $mutt_contenttype = '[-- Type: ';
67 $mutt_pgpsigned = '[-- End of signed data --]';
68 $mutt_beginsigned = '[-- The following data is signed --]';
69 $mutt_pgpclearsigstart = '[-- BEGIN PGP SIGNED MESSAGE --]';
70 $mutt_pgpclearsigned = '[-- END PGP SIGNED MESSAGE --]';
71 $mutt_pgpencrypted = '[-- End of PGP/MIME encrypted data --]';
72 $mutt_pgpoutstart = '[-- PGP output follows (current time:';
73 $mutt_pgpoutend = '[-- End of PGP output --]';
75 # set the defaults to the C locale
76 $gpg_WARNING = 'WARNING: ';
77 # (yes, the translations in gnupg's po files *are* braindamaged):
78 $gpg_Warning = 'WARNING: ';
79 $gpg_Cantcheck = 'Can\'t check signature: ';
81 $gpg_bad = 'BAD signature from ';
82 $gpg_expired = 'Note: This key has expired!';
83 $gpg_good = 'Good signature from';
84 # (actually, this bugs me quite often since upgrading gpg from v1.0.7):
85 $gpg_bug = '... this is a bug (';
88 # help(): print help text and exit with appropriate exit code
90 print "Usage: $0 [options]
91 -A=DIRECTORY ad footer directory, treat ad footers as signature
92 -a remove ad footers; requires -A
93 --bigq[=n[,x]] remove all but x lines of quotes with more than n
94 lines; default is n=30 and x=10
95 --body input has no headers; does not work with --pgp-short;
96 multipart messages will not be detected
97 -c merge multiple blank lines
98 --check[=FLAGS] check various criteria, print error message and quit;
99 see man page for details
100 -d, --debug print notice to syslog when bouncing; requires -p
101 --diff tolerate diffs appended *after* the signature
102 -e force ellipsis for excessive punctuation
103 --ftr-ad enable aggressive ad footer matching; requires -A
104 --ftr-ml enable aggressive mailing list footer matching; req. -L
105 --groupwise delete Novell Groupwise style TOFU
106 -h, --help show this short help and exit
107 -i=INFILE file to be read; '-' for STDIN (default)
108 -k try to fix \"Kammquotes\"
109 --kminl=n min. line length for wrapped line; requires -k
110 --kmaxl=n max. line length for wrapped line; requires -k
111 --kdiff=n max. length difference between wrapped lines; req. -k
112 -L=DIRECTORY mailing list footer directory, treat mailing list
114 -l delete mailing list footer; requires -L
115 --lax-security use unsafe writing method; USE ON YOUR OWN RISK!
116 --locale=LOCALE internationalization; currently only used with -Mmutt
117 -M, --mua=MUA turn on special treatment for some mail user agents
118 -m delete MS style TOFU; careful: might be too agressive
119 --max-lines=x maximum number of message lines
120 --ms-smart try to be smart with MS style TOFU; req. -Mmutt and -m
121 -o=OUTFILE file to be written to; '-' for STDOUT (default), 'NONE'
123 -P=MESSAGE user defined bounce message; requires -p
124 -p[=ADDRESS] redirect to ADDRESS if no TOFU was found
125 --pgp-move move pgp verification output to bottom; requires -Mmutt
126 --pgp-move-vrf move pgp output if verified and good; requires -Mmutt
127 --pgp-short hide non-relevant pgp key uids; requires -Mmutt
128 -r delete mail header lines
129 -S[=n] supress signatures with more than n lines (default $maxsig)
131 --sigsmax[=n] max number of sigs tolerated, no value for unlimited
132 --spass enable SpamAssassin workaround
133 -t delete traditional style TOFU
134 -v, --version show version string and exit
135 -w delete trailing whitespaces\n";
139 # version(): print version info and exit with appropriate exit code
141 print "$0 v".VER.REV." (Rev. ".REL."), Jochen Striepe <t-prot\@tolot.escape.de>
142 Get the latest version at <http://www.escape.de/users/tolot/mutt/>\n";
146 # sigint_handler(): what to do if we receive a single SIGINT
151 # remove_footers(): remove any trailing appearance of footers contained
152 # in the given directory.
154 my $L = shift; # array of message lines
155 my $S = shift; # array to store removed lines in
156 my $F = shift; # footers dir name
157 my $O = shift; # remove only one footer?
158 my $V = shift; # allow footers match before end of message
162 for ($off = 0; $#$L>=$off && $$L[$#$L-$off] =~ /^\s*$/; $off++) {;};
165 if ($F && scalar(@$L)) {
166 if (!opendir(DIR, $F))
167 { print STDERR "Could not open $F: $!\n"; exit(EX_IOERR); }
168 my @feet = grep { /^[^.]/ && -f "$F/$_" } readdir DIR;
171 foreach my $f (@feet) {
172 if (!open(IN, "$F/$f"))
173 { print STDERR "Could not open $F/$f: $!\n"; exit(EX_IOERR); }
177 if (!scalar(@l)) { next; }
178 for (my $z=0; $z<=$#l; $z++) { chomp($l[$z]); }
181 WIPE: for (my $z=scalar(@$L)-scalar(@l); $z>=0; $z--) {
182 if (scalar(@l)+$z<=scalar(@$L)) {
184 for(my $x=1; $x<=scalar(@l); $x++) {
185 if (index($$L[scalar(@$L)-$x-$z],
186 $l[scalar(@l)-$x])!=0) {
191 unshift(@$S, @$L[$#$L-$#l-$z..$#$L]);
192 splice(@$L, $#$L-$#l-$z);
193 while (scalar(@$L) && $$L[$#$L] =~ /^\s*$/) {
194 unshift(@$S, pop(@$L));
196 if ($O) { last; } else { goto WIPE; }
202 while (scalar(@l)<=scalar(@$L)) {
203 for(my $x=1; $x<=scalar(@l); $x++) {
204 if (index($$L[scalar(@$L)-$x-$off], $l[scalar(@l)-$x])!=0) {
208 unshift(@$S, @$L[$#$L-$off-$#l..$#$L]);
209 splice(@$L, $#$L-$off-$#l);
210 while (scalar(@$L) && $$L[$#$L] =~ /^\s*$/) {
211 unshift(@$S, pop(@$L));
221 # decomb(): Try to detect and fix zig-zag shaped quoting (a.k.a. German
224 my $L = shift; # array of message lines
225 my $V = shift; # array with verbatim list
226 my $max = 0; # plausible wraparound pos
228 # We scan the whole message first for a plausible common maximum line
229 # length where longer lines would be wrapped.
230 for (my $x=0; $x<$#$L; $x++) {
231 if ($$V[$x]!=1 && $max<length($$L[$x])) { $max = length($$L[$x]); }
234 # Next we see if there are plausible wraparounds.
235 for (my $x=0; $x+1<$#$L; $x++) {
238 # * it must not be verbatim,
239 # * the 2nd line must not be quoted nor empty nor just
240 # underlining some part of the line above (using '^')
241 # nor begin with a whitespace,
242 # * the 1st line must not end with a hyphen,
243 # * the 2nd line must not indicate content was deleted,
244 # * the 2nd line must not be some mutt(1) commentary,
245 # * there must not be a valid word wrap to produce a longer
246 # 1st line (if not quoted),
247 # * the 1st and 2nd line together must not be longer than some
248 # magical upper limit nor shorter than some magical lower
249 # bound nor nearly of the same length, and
250 # * the 3rd line must not be empty.
251 # With all that odds should be quite good that we have an
252 # automatedly wrapped line. Please send a note if you have
253 # additional good criteria. Thanks.
254 if (($$V[$x]!=1 && $$V[$x+1]!=1) &&
255 (index($$L[$x+1], $indent)!=0) &&
256 ($$L[$x+1] !~ /^$/) &&
257 ($$L[$x+1] !~ /^[\s^]/) &&
259 ($$L[$x+1] !~ /^\Q[...]\E\s*$/) &&
260 ($mua ne 'mutt' || $$L[$x+1] !~ /^(?:\e[^\a]+\a)?\[-- /) &&
261 (length($$L[$x])+index($$L[$x+1], ' ')>$max ||
262 (index($$L[$x+1], ' ')<0 &&
263 length($$L[$x])+length($$L[$x+1])>$max)) &&
264 (length($$L[$x])+length($$L[$x+1])<$kmaxl) &&
265 (length($$L[$x])+length($$L[$x+1])>$kminl) &&
266 (length($$L[$x])-length($$L[$x+1])>$kdiff) &&
267 ($$L[$x+2] !~ /^\s*$/))
269 $$L[$x] =~ s/\s*$/' ' . $$L[$x+1]/e;
270 splice(@$L, $x+1, 1);
271 splice(@$V, $x+1, 1);
276 # debigq(): Finds big quotes (more than $n lines quoted) and deletes all
277 # but $x lines of them.
279 my $L = shift; # array of message lines
280 my $V = shift; # array with verbatim list
283 for (my $i=0; $i<=$#$L; $i++) {
290 if (index($$L[$i], $indent)==0) { $k++; } else {
295 $$L[$i] = "[---=| Quote block shrinked by $0: " .
296 "$x lines snipped |=---]\n";
298 splice(@$L, $i, $x-1);
299 splice(@$V, $i, $x-1);
308 # pgp(): treat mutt(1)'s pgp/gpg output contained in signed or encrypted
313 my $L = shift; # message body
314 my $X = shift; # start line
315 my $Z = shift; # end line
320 if (index($$L[$X], "gpg: $gpg_WARNING")==0 ||
321 index($$L[$X], "gpg: $gpg_Warning")==0 ||
322 index($$L[$X], "gpg: $gpg_bad")==0 ||
323 index($$L[$X], "gpg: $gpg_Cantcheck")==0 ||
324 index($$L[$X], "gpg: $gpg_expired")==0 ||
325 index($$L[$X], "gpg: $gpg_bug")==0)
327 if (index($$L[$X], "gpg: $gpg_good")==0)
335 my $L = shift; # message body
336 my $V = shift; # verbatim list
337 my $H = shift; # headers
342 for (my $x=0; $x<scalar(@$L); $x++) {
343 if ($$V[$x]) { next; }
345 if ($$L[$x]=~/^(?:\e[^\a]+\a)?(?:\Q$mutt_pgpoutstart\E)/o)
348 for (my $m=0; $m<scalar(@$H); $m++) {
349 if (index($$H[$m], 'From:')==0) {
352 while (exists($$H[$m]) && $$H[$m] =~ /^\s/)
353 { $from .= $$H[$m]; $m++; }
357 ($from) = $from=~m/(\w[\w.+-]*@(?:[\w.+-]+\.)+[A-Za-z]{2,})/;
361 for (my $i=$x+1; $i<scalar(@$L); $i++) {
362 if ($pgpshort && index($$L[$i], "gpg: $gpg_aka")==0) {
365 if ($uid>1 && index($$L[$i], $from)<0) {
371 elsif ($$L[$i]=~/^(?:\e[^\a]+\a)?(?:\Q$mutt_pgpoutend\E)/o) {
373 ($pgpmovevrf && (!$sigint) && verified($L, $x+1, $i)))
375 push(@{$tmp[++$tmp]}, "\n", @$L[$x..($i+1)]);
376 splice(@$L, $x, $i-$x+2);
377 splice(@$V, $x, $i-$x+2);
378 $i -= $#{$tmp[$tmp]}-2;
388 (?:\Q$mutt_pgpencrypted\E |
389 \Q$mutt_pgpclearsigned\E|
393 splice(@$L, $x+1, 0, @{$tmp[$tmp]});
394 for (my $i=$x; $i<scalar(@{$tmp[$tmp]}); $i++) {
395 splice(@$V, $x+1, 0, (0));
397 $x += scalar(@{$tmp[$tmp--]});
403 push(@$L, @{$tmp[$tmp--]});
405 for (my $i=$#$V; $i<$#$L; $i++) { push(@$V, 0); }
409 # write_msg(): output
414 if ((!$lax) && ($O =~ /^>(.*)/) && ($1 ne '-')) {
415 if (!sysopen(OUT, $1, O_EXCL|O_CREAT|O_WRONLY)) {
416 print STDERR "Could not open $1: $!\n"; exit(EX_IOERR);
419 elsif (!open(OUT, $O)) {
420 print STDERR "Could not open $O: $!\n"; exit(EX_IOERR);
433 # process_msg(): This one proc does *everything* what has to be done with
434 # the lines of the message
438 my ($j, $x, $verb) = (0, 0, 0);
439 my (@ads, @hdr, @bo1, @bo2, @ftr, @sig, @vrb, @att) =
440 ((), (), (), (), (), (), (), (), ());
442 # Remove and store lines we might need later...
445 for ($x=0; $x<$#$lines; $x++) { if (@$lines[$x] =~ /^$/) { last; }; }
446 @hdr = @$lines[0..$x];
447 splice(@$lines, 0, $x+1);
449 # remember the original body lines count
450 my $linecount = scalar(@$lines);
453 remove_footers($lines, \@ftr, $footers, undef, $ftr_ml);
456 remove_footers($lines, \@ads, $ads, undef, $ftr_ad);
458 # See if we have a multipart content type. If yes, see if it is already
459 # ripped (e.g. by you MUA, assuming it does not get special treatment with
460 # --mua=foo), otherwise only leave the first part if it is plain text (if
461 # not, we are done - non-text messages are not our business).
462 if ($mua ne 'mutt') {
463 for ($x=0; $x<scalar(@hdr); $x++) {
464 if ($hdr[$x] =~ /^Content-[Tt]ype:\s+(.*)$/) {
467 if ($foo =~ m!^multipart/!) {
470 if ($hdr[$x] =~ /\Wboundary="([^"]+)"/i) { $foo = $1; }
472 for (my $z=1; $x+$z<@hdr && $hdr[$x+$z]=~/^\s/; $z++) {
473 if ($hdr[$x] =~ /\Wboundary="?([^"\s]+)"?$/i) {
481 for (my $x=0; $x<scalar(@$lines); $x++) {
482 if (index($$lines[$x], '--'.$foo)!=0) { next; }
484 my $bar = 'text/plain';
485 for ($x++; $x<@$lines && $$lines[$x]!~/^$/; $x++)
487 if ($$lines[$x] =~ /^Content-[Tt]ype:\s+(.*)/) {
491 if ($x>=scalar(@$lines)) { exit(EX_DATAERR); }
493 if ($bar =~ m!^text/plain!) {
495 for ($z=1; $x+$z<@$lines; $z++) {
496 if (index($$lines[$x+$z], '--'.$foo)==0) {
500 if ($x+$z>=scalar(@$lines)) { exit(EX_DATAERR); }
502 @bo2 = @$lines[$x+$z..$#$lines];
503 splice(@$lines, $x+$z);
504 if ($$lines[$#$lines] =~ /^\s*$/) {
505 unshift(@bo2, pop @$lines);
507 @bo1 = @$lines[0..$x];
508 splice(@$lines, 0, $x+1);
510 # remove mailing list and ad footers within this
512 remove_footers($lines, \@ftr, $footers, undef, $ftr_ml);
513 remove_footers($lines, \@ads, $ads, undef, $ftr_ad);
518 write_msg(($mda?'|'.SENDMAIL." $mda":">$ofile"),
519 ($hdrs?undef:\@hdr), $lines);
533 for ($x=0; $x<scalar(@$lines); $x++) {
534 if ($$lines[$x] =~ /^\s*#v([+-])$/) {
535 $verb = $1 eq '+' ? 1 : 0;
537 } else { $vrb[$x] = $verb; }
540 # Calculate quoting ratio (with respect to verbatims):
541 if ($check && scalar(@$lines)) {
542 my ($y, $z) = (0, 0);
543 for ($x=0; $x<scalar(@$lines); $x++) {
546 if (index($$lines[$x], $indent)==0) { $y++; }
550 if ($y/$z>=$check_ratio) {
556 if ($mua eq 'mutt') {
557 # See if we find pgp output generated by mutt before we scramble
558 # the thing. If yes, see if we can beautify it.
559 if ($pgpshort || $pgpmove || $pgpmovevrf) { pgp($lines, \@vrb, \@hdr); }
561 # Remove all but the first attachment (if this is text/plain)
562 # mutt did introduce (bah!). Remember, all this ugliness could
563 # be replaced with a proper and clean edit_filter patch in
565 for ($x=$#$lines; $x>=0; $x--) {
566 if ($vrb[$x]) { next; }
567 # The following regexp's are quite ugly because for most users
568 # these lines are coloured using termcap... (bah!)
570 /^(?:\e[^\a]+\a)?\Q$mutt_attachment\E(\d+)/o &&
575 (?:\Q$mutt_contenttype\E)
576 (?:text/plain|application/pgp)
580 (?:\Q$mutt_pgpsigned\E |
581 \Q$mutt_pgpclearsigned\E|
582 \Q$mutt_pgpencrypted\E)
585 # Strip attachments to prepare further processing
586 unshift(@att, @$lines[$x..$#$lines]);
588 # Try to fix trailing empty lines
589 while (scalar(@$lines) && $$lines[$#$lines] =~
590 /^(?:\e[^\a]+\a)?\s*$/) {
591 unshift(@att, pop(@$lines));
594 # Remove ML and ad footers within attachments:
596 if ($ml) { remove_footers($lines, \@tmp, $footers, undef); }
597 if ($ad) { remove_footers($lines, \@tmp, $ads, undef); }
598 $x = scalar(@$lines);
602 # care about the rest
604 for ($x=0; $x<$#att; $x++) {
605 if ($vrb[scalar(@$lines)+$x]) { next; }
607 # Pipe message/rfc822 parts to another instance of
608 # process_msg() for further processing.
609 # Please note that we cannot see what a hierarchy the
610 # original message had -- if there were message/rfc822
611 # parts within other message/rfc822 parts constellations
612 # can occur which we cannot resolve. Therefore we simply
613 # do not even try to be smart. This should work for most
615 # The following regexp is quite ugly because for most
616 # users the line is coloured using termcap... (bah!)
618 /^(?:\e[^\a]+\a)?\Q$mutt_attachment\E\d+/o &&
621 (?:\Q$mutt_contenttype\E) (?:message/rfc822|multipart/alternative)
625 while ($att[$x] !~ /^\s*$/) { $x++; }
628 my @tmp = @att[$x..$#att];
630 splice(@att, $x, scalar(@att)-$x, @tmp);
638 if (scalar(@$lines)) {
643 for ($x = $#$lines; $x>=0; $x--) {
645 if ($$lines[$x] =~ /^-- $/) {
647 for (my $i=1; $x+$i+1<scalar(@$lines); $i++) {
648 if ($$lines[$x+$i] =~ /^-{3}\s+\S/ &&
649 $$lines[$x+$i+1] =~ /^\+{3}\s+\S/)
652 unshift(@sig, @$lines[$x..$#$lines]);
658 if (defined($sign) && ++$sn==$sign) { last; } else { next; }
662 if ($sig || ($lsig && ($#$lines-$x-$empty>$lsig))) {
663 if ($lsig && !$sig) {
664 unshift(@sig, "[---=| Overlong signature removed by $0: " .
665 (scalar(@$lines)-$x) . " lines snipped |=---]\n");
670 unshift(@sig, @$lines[$x..$#$lines]);
673 if (defined($sign) && ++$sn==$sign) { last; } else { next; }
675 # any trailing newlines?
676 elsif ($chk_empty && $$lines[$x] =~ /^\s*$/) { $empty++; }
677 elsif ($chk_empty) { $chk_empty = 0; }
682 # See if there is some Kammquoting to fix:
683 if ($kamm) { decomb($lines, \@vrb); }
685 # Now care about TOFU.
686 # One common mispractice is M$ and Groupwise style TOFU:
688 # bloat this array if you want more internationalization:
689 my @tofu = ('Original Message',
690 'Original-Nachricht',
691 'Ursprüngliche Nachricht',
692 'Ursprüngliche Nachricht',
693 'Ursprungliche Nachricht',
695 'Ursprungligt meddelande',
696 'Oorspronkelijk bericht',
697 'Message d\'origine',
699 'Weitergeleitete Nachricht / Forwarded Message');
700 my $k = 0; # any text above?
701 my $tmp = 0; # flagged if inside PGP output
703 DONE: for ($x=0; $x<scalar(@$lines); $x++) {
705 foreach my $tmp (@tofu) {
706 if (($ms && $$lines[$x] =~ /^\s?-+\s?$tmp\s?-+/) ||
708 ($$lines[$x] =~ /^>>>[^\<]+<[^\>]+> \d\d?\/\d\d?\/\d\d? \d\d?:\d\d [AP]M >>>/ ||
709 $$lines[$x] =~ /^>>> On [A-Z][a-z][a-z]?, [A-Z][a-z][a-z]? \d\d?, \d\d\d\d at [ \d]\d:\d\d [AP]M, in message/))) {
717 if ((!$k) && $$lines[$x] !~ /^\s*$/o &&
720 # this line seems not necessary since mutt-1.5.18:
721 $$lines[$x] !~ /^\e[^\a]+\a$/o &&
723 /^(?:\e[^\a]+\a)?(?:\Q$mutt_attachment\E)/o &&
725 /^(?:\e[^\a]+\a)?(?:\Q$mutt_contenttype\E)/o)) &&
726 ((!$spass) || index($$lines[$x], $spass_prefix)!=0))
728 if ($mua eq 'mutt' && (!$tmp) &&
730 /^(?:\e[^\a]+\a)?(?:\Q$mutt_pgpoutstart\E)/o) {
732 } elsif ($mua eq 'mutt' && $tmp &&
734 /^(?:\e[^\a]+\a)?(?:\Q$mutt_beginsigned\E)/o ||
736 /^(?:\e[^\a]+\a)?(?:\Q$mutt_pgpclearsigstart\E)/o)) {
745 # try to avoid false positives and only delete m$ style tofu if
746 # there is text above
748 if (!$ms_smart) { goto CLEAN; }
750 # first, see if there is pgp stuff inside the tofu:
751 my $p = 0; # levels of pgp signed parts
753 for (my $i=$x+1; $i<scalar(@$lines); $i++) {
755 /^(?:\e[^\a]+\a)?(?:\Q$mutt_pgpclearsigstart\E)/o) {
760 STAIRS: for (my $i=0; $i<scalar(@att); $i++) {
761 if ($p==0 && $att[$i] =~ /^(?:\e[^\a]+\a)?\[-- /o) {
766 /^(?:\e[^\a]+\a)?(?:\Q$mutt_pgpclearsigned\E)/o) {
767 splice(@att, 0, $i+1);
775 # now removing is safe:
776 CLEAN: $j = scalar(@$lines)-$x;
781 # Nothing? Then try traditional TOFU (deleting M$ style TOFU is done
782 # much more aggressively, so we won't need to search any more if we
784 if ($trad && (!$j) && !$vrb[$#$lines]) {
785 if (scalar(@$lines) && $$lines[$#$lines] =~ /^\s*$/) {
786 unshift(@sig, pop(@$lines));
792 for (my $i=$#$lines; $i>=0; $i--) {
793 if ($$lines[$i] =~ /^$indent/o) {
797 elsif ($$lines[$i] !~ /^\s*$/) { last; }
801 # if there is no text above, we will assume the message is meant
802 # as forwarding and therefore OK
803 for (my $i=$k-1; $i>=0; $i--) {
804 if ($$lines[$i] !~ /^\s*$/o) {
817 # OK, if we found TOFU, we will leave a message that we were here...
819 # make sendmail bounce if we shall be picky
820 # and indeed found something:
826 eval { require Sys::Syslog; };
827 if ($@) { warn $@; } else {
828 Sys::Syslog::setlogsock('unix');
829 Sys::Syslog::openlog("$0[$$]", 'pid', 'mail');
830 Sys::Syslog::syslog('debug', 'bounced message %s', $hdr[0]);
831 Sys::Syslog::closelog();
839 # if we were invoked just for checking and indeed found something,
840 # print out the error message and quit:
846 push(@$lines, "[---=| TOFU protection by $0: " .
847 "$j lines snipped |=---]\n");
849 elsif ($mda eq '1') { exit EX_OK; }
851 # Care for huge blocks of quoted original message:
852 if ($bigqn) { debigq($lines, \@vrb); }
854 # Care for trailing whitespaces:
856 for ($x=0; $x<scalar(@$lines); $x++) {
857 if (!$vrb[$x]) { $$lines[$x] =~ s/[\ \t]+$//; }
861 # Care for punctuation abuse:
863 for ($x=0; $x<scalar(@$lines); $x++) {
864 if (!$vrb[$x]) { $$lines[$x] =~ s/(([.?!])\2\2)\2+/$1/g; }
868 # (Nearly) at last care for multiple blank lines. (Do not do this
869 # earlier -- the way it is done right now would screw up the verbatim
873 for ($x=scalar(@$lines)-1; $x>=0; $x--) {
874 if ((!$vrb[$x]) && $$lines[$x] =~ /^\s*$/) {
875 if ($t<2) { $t++; } else { splice(@$lines, $x, 1); }
881 # Everything changing the body is done now. Time to fix the line count
882 # header so naive clients do not get confused. Just to be sure, append
883 # the old line count to X-headers.
884 my $l = scalar(@bo1) + scalar(@$lines) + scalar(@att) + scalar(@bo2) +
885 (!$sig?scalar(@sig):0) + (!$ml?scalar(@ftr):0) +
886 (!$ad?scalar(@ads):0);
887 if ($linecount-$l!=0) {
888 for ($x=0; $x<scalar(@hdr); $x++) {
890 s/^(Lines:\s+)(\d+)/$1.($2-$linecount+$l)/e)
892 $hdr[$#hdr] = "X-Old-Lines: $2\n";
898 # Finally, before leaving we put everything back in right order.
899 unshift(@$lines, (!$hdrs?@hdr:()), @bo1);
900 push(@$lines, (!$sig?@sig:()), (!$ad?@ads:()), (!$ml?@ftr:()), @att,
906 my $locale = $ENV{'LC_ALL'}?$ENV{'LC_ALL'}:
907 ($ENV{'LC_MESSAGES'}?$ENV{'LC_MESSAGES'}:$ENV{'LANG'});
909 # command line switches
910 ($ad, $ads, $bigqn, $bigqx, $check, $cr, $sysl, $diff, $elli, $footers, $lax,
911 $ml, $gw, $ms, $ms_smart, $mda, $mua, $hdrs, $kamm, $lsig, $nohdr, $sig,
912 $sigint, $spass, $trad, $trsp) =
913 (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
914 my $ifile = '-'; # use STDIN if nothing specified
916 # get command line params:
917 Getopt::Mixed::init('a A=s c d e h i=s k L=s l m M=s o=s P=s p:s r S:i'.
918 ' s t v w bigq:s body check:s debug>d diff ftr-ad ftr-ml groupwise'.
919 ' help>h kminl=i kmaxl=i kdiff=i lax-security locale=s max-lines=i'.
920 ' ms-smart mua>M pgp-short pgp-move pgp-move-vrf sigsmax:i spass'.
922 while (my ($opt, $val, $pretty) = nextOption()) {
923 if ($opt eq 'a') { $ad = 1; }
924 elsif ($opt eq 'A') { $ads = $val; }
925 elsif ($opt eq 'bigq') {
926 if ($val !~ /^(?:(\d+)(?:,(\d+))?)?$/) { help(); }
929 if ($bigqn<=0 || $bigqx<=0 || $bigqn<=$bigqx) { help(); }
931 elsif ($opt eq 'body') { $nohdr = 1; $hdrs = 1; }
932 elsif ($opt eq 'c') { $cr = 1; }
933 elsif ($opt eq 'check') {
935 while ($val && $val =~ /^([^,\s]+)(?:,(\S+))?$/) {
939 if ($foo =~ /^ratio(?:=(0?\.\d+))?$/) {
940 $check_ratio = $1?$1:0.75;
944 elsif ($opt eq 'd') { $sysl = 1; }
945 elsif ($opt eq 'diff') { $diff = 1; }
946 elsif ($opt eq 'e') { $elli = 1; }
947 elsif ($opt eq 'ftr-ad') { $ftr_ad = 1; $ad = 1; }
948 elsif ($opt eq 'ftr-ml') { $ftr_ml = 1; $ml = 1; }
949 elsif ($opt eq 'groupwise') { $gw = 1; }
950 elsif ($opt eq 'i') { $ifile = $val; }
951 elsif ($opt eq 'k') { $kamm = 1; }
952 elsif ($opt eq 'kminl') { $kminl = $val; $kamm = 1; }
953 elsif ($opt eq 'kmaxl') { $kmaxl = $val; $kamm = 1; }
954 elsif ($opt eq 'kdiff') { $kdiff = $val; $kamm = 1; }
955 elsif ($opt eq 'L') { $footers = $val; }
956 elsif ($opt eq 'l') { $ml = 1; }
957 elsif ($opt eq 'lax-security') { $lax = 1; }
958 elsif ($opt eq 'locale') { $locale = $val; }
959 elsif ($opt eq 'm') { $ms = 1; }
960 elsif ($opt eq 'max-lines') { $maxlines = $val; }
961 elsif ($opt eq 'ms-smart') { $ms_smart = 1; $ms = 1; }
962 elsif ($opt eq 'M') {
965 if ($mua eq 'mutt') {
966 # mutt still displays the message when ^C'ing pgp verification:
967 $SIG{'INT'} = 'sigint_handler';
970 elsif ($opt eq 'o') { $ofile = $val; }
971 elsif ($opt eq 'P') { $boun = $val; }
972 elsif ($opt eq 'p') { $mda = $val ? $val : '1'; }
973 elsif ($opt eq 'pgp-short') { $pgpshort = 1; }
974 elsif ($opt eq 'pgp-move') { $pgpmove = 1; }
975 elsif ($opt eq 'pgp-move-vrf') { $pgpmovevrf = 1; }
976 elsif ($opt eq 'r') { $hdrs = 1; }
977 elsif ($opt eq 'S') { $lsig = $val ? $val : $maxsig; }
978 elsif ($opt eq 's') { $sig = 1; }
979 elsif ($opt eq 'sigsmax') { $sign = $val ? $val : undef; }
980 elsif ($opt eq 'spass') { $spass = 1; }
981 elsif ($opt eq 't') { $trad = 1; }
982 elsif ($opt eq 'v') { version(); }
983 elsif ($opt eq 'w') { $trsp = 1; }
986 Getopt::Mixed::cleanup();
987 if (($ml && $footers eq '')|| # no -l without -L
988 ($ad && $ads eq '')|| # no -a without -A
989 ($nohdr && $pgpshort)|| # --body and --pgp-short are like oil and water
990 ($ifile eq '')|| # no empty -i
991 ($ofile eq '')) # no empty -o
995 if ($mua eq 'mutt') {
996 if (defined $locale && $locale ne '' && $locale ne 'C' && $locale ne 'POSIX') {
997 eval { require Locale::gettext; };
998 if ($@) { warn $@; exit(EX_SOFTWARE); } else {
999 Locale::gettext::textdomain('mutt');
1000 ($mutt_attachment) =
1001 Locale::gettext::gettext("[-- Attachment #%d") =~
1003 ($mutt_contenttype) =
1004 Locale::gettext::gettext("[-- Type: %s/%s, Encoding: %s, Size: %s --]\n") =~
1007 Locale::gettext::gettext("[-- End of signed data --]\n") =~
1009 ($mutt_beginsigned) =
1010 Locale::gettext::gettext("[-- The following data is signed --]\n\n") =~
1012 ($mutt_pgpclearsigned) =
1013 Locale::gettext::gettext("[-- END PGP SIGNED MESSAGE --]\n") =~
1015 ($mutt_pgpclearsigstart) =
1016 Locale::gettext::gettext("[-- BEGIN PGP SIGNED MESSAGE --]\n") =~
1018 ($mutt_pgpencrypted) =
1019 Locale::gettext::gettext("[-- End of PGP/MIME encrypted data --]\n") =~
1021 ($mutt_pgpoutstart) =
1022 Locale::gettext::gettext("[-- PGP output follows (current time: %c) --]\n") =~
1025 Locale::gettext::gettext("[-- End of PGP output --]\n") =~
1028 Locale::gettext::textdomain('gnupg');
1030 Locale::gettext::gettext("WARNING: using insecure random number generator!!\n") =~
1033 Locale::gettext::gettext("WARNING: message was encrypted with a weak key in the symmetric cipher.\n") =~
1036 Locale::gettext::gettext("Can't check signature: %s\n") =~
1039 Locale::gettext::gettext((' 'x16).'aka "%s"') =~
1042 Locale::gettext::gettext('BAD signature from "%s"') =~
1045 Locale::gettext::gettext("Note: This key has expired!\n") =~
1048 Locale::gettext::gettext('Good signature from "%s"') =~
1049 m/^(([^"«%]*))["«%]/;
1051 Locale::gettext::gettext("... this is a bug (%s:%d:%s)\n") =~
1057 elsif ($ms_smart || $pgpshort || $pgpmove || $pgpmovevrf) { help(); }
1061 if (!open(IN, $ifile))
1062 { print STDERR "Could not open $ifile: $!\n"; exit(EX_IOERR); }
1066 # First, check msg length and stop processing if msg is too long:
1067 if ((defined $maxlines) && (@message > $maxlines)) {
1068 if ($ofile ne 'NONE') {
1069 if ($mua eq 'mutt') {
1072 do { $x++; } while ($x<$#message && $message[$x]!~/^$/);
1075 splice(@message, $x, 0,
1076 ("[---=| Processing by $0 skipped: message too long |=---]\n\n"));
1079 write_msg(($mda?'|'.SENDMAIL." $mda":">$ofile"), \@message);
1081 if ($mua eq 'mutt') { exit(EX_OK); }
1085 # this should be self-explanatory:
1086 process_msg(\@message);
1088 # Finally, print clean lines:
1089 if ($ofile ne 'NONE') {
1090 write_msg(($mda?'|'.SENDMAIL." $mda":">$ofile"), \@message);
1093 # vim600:set foldmethod=marker: