#!/usr/bin/perl -w
# $Id: t-prot,v 1.218 2005/02/02 13:46:42 jochen Exp $

require 5.006;
use strict;
use Fcntl qw(O_EXCL O_WRONLY O_CREAT);
use Getopt::Mixed qw(nextOption);
use constant VER            => '1.49';
use constant REV            => '';
use constant REL            => q$Revision: 1.218 $=~m/(\d+(?:\.\d+)+)/;
# MTA expecting mail on STDIN
# (you might have to adjust this if using a different MTA)
use constant SENDMAIL       => '/usr/sbin/sendmail -oi';
# From <sysexits.h>
# (you might have to adjust those if your libc wants different values)
use constant EX_OK          =>  0;
use constant EX_USAGE       => 64;
use constant EX_DATAERR     => 65;
use constant EX_UNAVAILABLE => 69;
use constant EX_IOERR       => 74;
use constant EX_BOUNCE      => EX_UNAVAILABLE;
use vars qw(
    $ad $ads $bigqn $bigqx $boun $check $check_ratio $cr $diff $elli
    $footers $ftr_ad $ftr_ml $hdrs $indent $kamm $kdiff $kminl $kmaxl
    $lax $lsig $maxsig $mda $ml $ms $ms_smart $msg_quote $msg_ratio
    $mua $ofile $pgpshort $pgpmove $pgpmovevrf $sig $sigint $sign
    $spass $spass_prefix $sysl $trad $trsp

    $gpg_WARNING $gpg_Warning $gpg_Cantcheck $gpg_aka $gpg_bad
    $gpg_expired $gpg_good $gpg_bug

    $mutt_attachment $mutt_contenttype $mutt_pgpsigned $mutt_beginsigned
    $mutt_pgpclearsigned $mutt_pgpclearsigstart $mutt_pgpencrypted
    $mutt_pgpoutstart $mutt_pgpoutend
);


# Please adjust these vals to your needs (they are no constants because
# command line can change them or they are used in rexexp's):
$0 =~ s!^.*/!!;
$maxsig         = 4;      # max. valid signature length
$indent         = '>';    # Indent string, regexp to identify a quoted line
$kminl          = 65;     # see decomb() for details
$kmaxl          = 80;
$kdiff          = 20;
$pgpshort       = 0;      # hide pgp key ids if set
$pgpmove        = 0;      # move pgp output to bottom if set
$pgpmovevrf     = 0;
$sign           = 1;      # max number of sigs tolerated, undef for no limit
$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";
$ftr_ad         = undef;  # too hard on performance to be default
$ftr_ml         = undef;  # too hard on performance to be default
$ofile          = '-';    # use STDOUT if nothing is specified
$spass_prefix   = 'SPAM: ';
$check_ratio    = .75;    # 3/4 tofu is enough not to accept the message
$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";
$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";
# end of user adjusted vals

# mutt's locales as in mutt-1.3.28 up to mutt-1.4.2.1 {{{
my %mutt_attachment = (
	'bg' => '[-- �������� ����: #',
	'ca' => '[-- Fitxer adjunt #',
	'cs' => '[-- P��loha #',
	'da' => '[-- Brevdel #',
	'de' => '[-- Anhang #',
	'el' => '[-- ���������� #',
	'eo' => '[-- Parto #',
	'es' => '[-- Archivo adjunto #',
	'et' => '[-- Lisa #',
	'fr' => '[-- Attachement #',
	'gl' => '[-- Adxunto #',
	'hu' => '[-- Mell�klet #',
	'id' => '[-- Lampiran #',
	'it' => '[-- Allegato #',
	'ja' => '[-- ź�եե����� #',
	'ko' => '[-- ÷�ι� #',
	'lt' => '[-- Priedas #',
	'nl' => '[-- Bijlage #',
	'pl' => '[-- Za��cznik #',
	'pt_BR' => '[-- Anexo No.',
	'ru' => '[-- �������� #',
	'sk' => '[-- Pr�loha #',
	'sv' => '[-- Bilaga #',
	'tr' => '[-- Eklenti #',
	'uk' => '[-- ������� ����� ',
	'zh_CN' => '[-- ���� #',
	'zh_TW' => '[-- 附件 #'
);
my %mutt_contenttype = (
	'bg' => '[-- ���: ',
	'ca' => '[-- Tipus: ',
	'cs' => '[-- Typ: ',
	'de' => '[-- Typ: ',
	'el' => '[-- �����: ',
	'eo' => '[-- Speco: ',
	'es' => '[-- Tipo: ',
	'et' => '[-- T��p: ',
	'fr' => '[-- Type : ',
	'gl' => '[-- Tipo: ',
	'hu' => '[-- T�pus: ',
	'id' => '[-- Jenis: ',
	'it' => '[-- Tipo: ',
	'ja' => '[-- ������: ',
	'ko' => '[-- ����: ',
	'lt' => '[-- Tipas: ',
	'pl' => '[-- Typ: ',
	'pt_BR' => '[-- Tipo: ',
	'ru' => '[-- ���: ',
	'sk' => '[-- Typ: ',
	'sv' => '[-- Typ: ',
	'tr' => '[-- Tip: ',
	'uk' => '[-- ���: ',
	'zh_CN' => '[-- ��̬:  ',
	'zh_TW' => '[-- 種類：'
);
my %mutt_pgpsigned = (
	'bg' => '[-- ���� �� ����������� ����� --]',
	'ca' => '[-- Final de les dades signades. --]',
	'cs' => '',
	'da' => '[-- Slut p� underskrevne data --]',
	'de' => '[-- Ende der signierten Daten --]',
	'el' => '[-- ����� ��������� �������������� --]',
	'eo' => '[-- Fino de subskribitaj datenoj --]',
	'es' => '',
	'et' => '[-- Allkirjastatud info l�pp --]',
	'fr' => '[-- Fin des donn�es sign�es --]',
	'gl' => '',
	'hu' => '',
	'id' => '[-- Akhir data yang ditandatangani --]',
	'it' => '[-- Fine dei dati firmati --]',
	'ja' => '[-- ��̾�ǡ�����λ --]',
	'ko' => '[-- ���� �ڷ� �� --]',
	'lt' => '',
	'nl' => '',
	'pl' => '[-- Koniec podpisanych danych --]',
	'pt_BR' => '',
	'ru' => '[-- ����� ����������� ������ --]',
	'sk' => '',
	'sv' => '[-- Slut p� signerat data --]',
	'tr' => '',
	'uk' => '[-- ����� �������� ����� --]',
	'zh_CN' => '',
	'zh_TW' => ''
);
my %mutt_beginsigned = (
    'bg' => '[-- �������� ����� �� ��������� --]',
    'ca' => '[-- Les dades seg�ents es troben signades: --]',
    'cs' => '[-- N�sleduj� podepsan� data --]',
    'da' => '[-- F�lgende data er underskrevet --]',
    'de' => '[-- Die folgenden Daten sind signiert --]',
    'el' => '[-- �� ������� �������� ����� ������������� --]',
    'eo' => '[-- La sekvaj datenoj estas subskribitaj --]',
    'es' => '[-- Los siguientes datos est�n firmados --]',
    'et' => '[-- J�rgnev info on allkirjastatud --]',
    'fr' => '[-- Les donn�es suivantes sont sign�es --]',
    'gl' => '[-- Os datos a continuaci�n est�n asinados --]',
    'hu' => '[-- A k�vetkez� adatok al� vannak �rva --]',
    'id' => '[-- Data berikut ini ditandatangani --]',
    'it' => '[-- I seguenti dati sono firmati --]',
    'ja' => '[-- �ʲ��Υǡ����Ͻ�̾����Ƥ��� --]',
    'ko' => '[-- �Ʒ��� �ڷ�� ���� �Ǿ��� --]',
    'lt' => '[-- Toliau einantys duomenys yra pasira�yti --]',
    'nl' => '[-- De volgende gegevens zijn PGP/MIME ondertekend --]',
    'pl' => '[-- Poni�sze dane s� podpisane --]',
    'pt_BR' => '[-- Os dados a seguir est�o assinados --]',
    'ru' => '[-- ������ ����������� ������ --]',
    'sk' => '[-- Nasleduj�ce d�ta s� podp�san� s PGP/MIME --]',
    'sv' => '[-- F�ljande data �r signerat --]',
    'tr' => '[-- Bu bilgi imzalanm��t�r --]',
    'uk' => '[-- ������Φ ��Φ Ц������� --]',
    'zh_CN' => '[-- ���µ������ѱ�ǩ�� --]',
    'zh_TW' => '[-- 以下的資料已被簽署 --]',
);
my %mutt_pgpencrypted = (
	'bg' => '[-- ���� �� PGP/MIME ����������� ����� --]',
	'ca' => '[-- Final de les dades xifrades amb PGP/MIME. --]',
	'cs' => '',
	'da' => '[-- Slut p� PGP/MIME-krypteret data --]',
	'de' => '[-- Ende der PGP/MIME-verschl�sselten Daten --]',
	'el' => '[-- ����� ��������� ���������������� ���� PGP/MIME --]',
	'eo' => '[-- Fino de PGP/MIME-�ifritaj datenoj --]',
	'es' => '',
	'et' => '[-- PGP/MIME kr�ptitud info l�pp --]',
	'fr' => '[-- Fin des donn�es chiffr�es avec PGP/MIME --]',
	'gl' => '',
	'hu' => '',
	'id' => '[-- Akhir data yang dienkripsi dg PGP/MIME --]',
	'it' => '[-- Fine dei dati cifrati con PGP/MIME  --]',
	'ja' => '[-- PGP/MIME�Ź沽�ǡ�����λ --]',
	'ko' => '[-- PGP/MIME ��ȣȭ �ڷ� �� --]',
	'lt' => '',
	'nl' => '',
	'pl' => '[-- Koniec danych zaszyfrowanych PGP/MIME --]',
	'pt_BR' => '',
	'ru' => '[-- ����� ������, ������������� � ������� PGP/MIME --]',
	'sk' => '',
	'sv' => '[-- Slut p� data krypterad enligt PGP/MIME --]',
	'tr' => '',
	'uk' => '[-- ����� �����, ������������ PGP/MIME --]',
	'zh_CN' => '',
	'zh_TW' => ''
);
my %mutt_pgpclearsigned = (
	'bg' => '[-- ���� �� PGP-����������� ����� --]',
	'ca' => '[-- TERMINA EL MISSATGE PGP SIGNAT --]',
	'cs' => '',
	'el' => '[-- ����� �������������� PGP ��������� --]',
	'eo' => '[-- FINO DE PGP-SUBSKRIBITA MESA�O --]',
	'es' => '',
	'et' => '[-- PGP ALLKIRJASTATUD TEATE L�PP --]',
	'fr' => '[-- FIN DE MESSAGE SIGN� PGP --]',
	'gl' => '',
	'hu' => '',
	'id' => '[-- AKHIR PESAN DG TANDATANGAN PGP --]',
	'it' => '[-- FINE DEL MESSAGGIO FIRMATO CON PGP --]',
	'ja' => '[-- PGP��̾��å�������λ --]',
	'ko' => '[-- PGP ���� ���� �� --]',
	'lt' => '',
	'nl' => '',
	'pl' => '[-- KONIEC LISTU PODPISANEGO PGP --]',
	'pt_BR' => '',
	'ru' => '[-- ����� ���������, ������������ PGP --]',
	'sk' => '',
	'sv' => '[-- SLUT P� MEDDELANDE SIGNERAT MED PGP --]',
	'tr' => '',
	'uk' => '[-- ����� ��צ�������� � PGP Ц������ --]',
	'zh_CN' => '',
	'zh_TW' => ''
);
my %mutt_pgpclearsigstart = (
	'bg' => '[-- ������ �� PGP-����������� ����� --]',
	'ca' => '[-- COMEN�A EL MISSATGE PGP SIGNAT --]',
	'cs' => '[-- ZA��TEK PODEPSAN� PGP ZPR�VY --]',
	'el' => '[-- ������ �������������� PGP ��������� --]',
	'eo' => '[-- KOMENCO DE PGP-SUBSKRIBITA MESA�O --]',
	'es' => '[-- PRINCIPIO DEL MENSAJE FIRMADO CON PGP --]',
	'et' => '[-- PGP ALLKIRJASTATUD TEATE ALGUS --]',
	'fr' => '[-- D�BUT DE MESSAGE SIGN� PGP --]',
	'gl' => '[-- COMEZA A MESAXE FIRMADA CON PGP --]',
	'hu' => '[-- PGP AL��RT LEV�L KEZD�DIK --]',
	'id' => '[-- AWAL SURAT DG TANDATANGAN PGP --]',
	'it' => '[-- INIZIO DEL MESSAGGIO FIRMATO CON PGP --]',
	'ja' => '[-- PGP��̾��å��������� --]',
	'ko' => '[-- PGP ���� ���� ���� --]',
	'lt' => '[-- PGP PASIRA�YTO LAI�KO PRAD�IA --]',
	'nl' => '[-- BEGIN PGP ONDERTEKEND BERICHT --]',
	'pl' => '[-- POCZ�TEK LISTU PODPISANEGO PGP --]',
	'pt_BR' => '[-- IN�CIO DE MENSAGEM ASSINADA POR PGP --]',
	'ru' => '[-- ������ ���������, ������������ PGP --]',
	'sk' => '[-- ZA�IATOK SPR�VY PODP�SANEJ S PGP --]',
	'sv' => '[-- MEDDELANDE SIGNERAT MED PGP B�RJAR --]',
	'tr' => '[-- PGP IMZALANMI� ILETI BA�I --]',
	'uk' => '[-- ������� ��צ�������� � PGP Ц������ --]',
	'zh_CN' => '[-- PGP ǩ�����ż���ʼ --]',
	'zh_TW' => '[-- PGP 簽名的信件開始 --]'
);
my %mutt_pgpoutstart = (
	'bg' => '[-- ������ ��������� �� PGP (������ ����: ',
	'ca' => '[-- Aquesta �s l\'eixida de PGP (data actual: ',
	'cs' => '[-- n�sleduje v�stup PGP (aktu�ln� �as: ',
	'da' => '[-- PGP-uddata f�lger (aktuelt tidspunkt: ',
	'de' => '[-- PGP-Ausgabe folgt (aktuelle Zeit: ',
	'el' => '[-- ��������� ������ ��� PGP (�������� ���: ',
	'eo' => '[-- Eligo de PGP sekvas (nuna horo: ',
	'es' => '[-- Salida de PGP a continuaci�n (tiempo actual: ',
	'et' => '[-- j�rgneb PGP v�ljund (praegune aeg: ',
	'fr' => '[-- La sortie PGP suit (heure courante : ',
	'gl' => '[-- Sa�da PGP a continuaci�n (hora actual: ',
	'hu' => '[-- PGP kimenet k�vetkezik (id�: ',
	'id' => '[-- Keluaran dari PGP (waktu skrg: ',
	'it' => '[-- Segue l\'output di PGP (ora attuale: ',
	'ja' => '[-- PGP ���Ϥϰʲ����̤� (���߻���: ',
	'ko' => '[-- PGP ��� (���� �ð�: ',
	'lt' => '[-- Toliau PGP i�vestis (esamas laikas: ',
	'nl' => '[-- PGP uitvoer volgt (Huidige tijd: ',
	'pl' => '[-- Wynik dzia�ania PGP (bie��ca data i czas: ',
	'pt_BR' => '[-- Sa�da do PGP a seguir (hora atual: ',
	'ru' => '[-- ��������� ������ ��������� PGP (������� �����: ',
	'sk' => '[-- Nasleduje v�stup PGP (aktu�lny �as: ',
	'sv' => '[-- Utdata fr�n PGP f�ljer (aktuell tid: ',
	'tr' => '[-- PGP geri verisi (ge�erli zaman: ',
	'uk' => '[-- ����� �� ����Ħ PGP (���: ',
	'zh_CN' => '[-- ����Ϊ PGP ��������ϣ�����ʱ�䣺 ',
	'zh_TW' => '[-- 以下為 PGP 輸出的資料（現在時間：'
);
my %mutt_pgpoutend = (
	'bg' => '[-- ���� �� PGP-��������� --]',
	'ca' => '[-- Final de l\'eixida de PGP. --]',
	'cs' => '[-- Konec v�stupu PGP --]',
	'da' => '[-- Slut p� PGP-uddata --]',
	'de' => '[-- Ende der PGP-Ausgabe --]',
	'el' => '[-- ����� ��� ������ PGP --]',
	'eo' => '[-- Fino de PGP-eligo --]',
	'es' => '[-- Fin de salida PGP --]',
	'et' => '[-- PGP v�ljundi l�pp --]',
	'fr' => '[-- Fin de sortie PGP --]',
	'gl' => '[-- Fin da sa�da PGP --]',
	'hu' => '[-- PGP kimenet v�ge --]',
	'id' => '[-- Akhir keluaran PGP --]',
	'it' => '[-- Fine dell\'output di PGP --]',
	'ja' => '[-- PGP���Ͻ�λ --]',
	'ko' => '[-- PGP ��� �� --]',
	'lt' => '[-- PGP i�vesties pabaiga --]',
	'nl' => '[-- Einde van PGP uitvoer --]',
	'pl' => '[-- Koniec komunikat�w PGP --]',
	'pt_BR' => '[-- Fim da sa�da do PGP --]',
	'ru' => '[-- ����� ������ ��������� PGP --]',
	'sk' => '[-- Koniec v�stupu PGP --]',
	'sv' => '[-- Slut p� utdata fr�n PGP --]',
	'tr' => '[-- PGP geri verisi sonu --]',
	'uk' => '[-- ����� ������ �� ����Ħ PGP --]',
	'zh_CN' => '[-- PGP ������ݽ��� --]',
	'zh_TW' => '[-- PGP 輸出部份結束 --]'
);
# }}}
# set the defaults to the C locale
$mutt_attachment        = '[-- Attachment #';
$mutt_contenttype       = '[-- Type: ';
$mutt_pgpsigned         = '[-- End of signed data --]';
$mutt_beginsigned       = '[-- The following data is signed --]';
$mutt_pgpclearsigstart  = '[-- BEGIN PGP SIGNED MESSAGE --]';
$mutt_pgpclearsigned    = '[-- END PGP SIGNED MESSAGE --]';
$mutt_pgpencrypted      = '[-- End of PGP/MIME encrypted data --]';
$mutt_pgpoutstart       = '[-- PGP output follows (current time:';
$mutt_pgpoutend         = '[-- End of PGP output --]';

# gpg's locales as in gpg-1.4.0 {{{
my %gpg_WARNING = (
	'be' => '',
	'ca' => 'AV�S: ',
	'cs' => 'VAROV�N�: ',
	'da' => 'ADVARSEL: ',
	'de' => 'WARNUNG: ',
	'el' => '�������������: ',
	'eo' => 'AVERTO: ',
	'es' => 'ATENCI�N: ',
	'et' => 'HOIATUS: ',
	'fi' => 'VAROITUS: ',
	'fr' => 'ATTENTION: ',
	'gl' => 'AVISO: ',
	'hu' => 'FIGYELEM: ',
	'id' => 'PERINGATAN: ',
	'it' => 'ATTENZIONE: ',
	'ja' => '�ٹ�: ',
	'pl' => 'OSTRZE�ENIE: ',
	'pt' => 'AVISO: ',
	'pt_BR' => 'AVISO: ',
	'ro' => 'AVERTISMENT: ',
	'ru' => 'ВНИМАНИЕ: ',
	'sk' => 'VAROVANIE: ',
	'sv' => 'VARNING: ',
	'tr' => 'UYARI: ',
	'zh_CN' => '警告：我们不信任这把密钥！',
	'zh_TW' => 'ĵ�i�G�ڭ� *��* �H���o����_�I'
);
my %gpg_Warning = (
	'be' => '',
	'ca' => 'AV�S: ',
	'cs' => 'VAROV�N�: ',
	'da' => '',
	'de' => 'Warnung: ',
	'el' => '�������������: ',
	'eo' => 'AVERTO: ',
	'es' => 'ATENCI�N: ',
	'et' => 'HOIATUS: ',
	'fi' => 'VAROITUS: ',
	'fr' => 'AVERTISSEMENT: ',
	'gl' => 'AVISO: ',
	'hu' => 'FIGYELEM: ',
	'id' => 'PERINGATAN: ',
	'it' => 'ATTENZIONE: ',
	'ja' => '�ٹ�: ',
	'pl' => 'OSTRZE�ENIE: ',
	'pt' => 'CUIDADO: ',
	'pt_BR' => 'CUIDADO: ',
	'ro' => 'AVERTISMENT: ',
	'ru' => 'ВНИМАНИЕ: ',
	'sk' => 'VAROVANIE: ',
	'sv' => 'VARNING: ',
	'tr' => 'UYARI: ',
	'zh_CN' => '警告：加密过的报文已经变造！',
	'zh_TW' => 'ĵ�i�G�[�K�L���T���w�g�Q�ܳy�F�I'
);
my %gpg_Cantcheck = (
	'be' => '',
	'ca' => 'No sha pogut comprovar la signatura: ',
	'cs' => 'Nemohu ov��it podpis: ',
	'da' => 'Kan ikke tjekke signatur: ',
	'de' => 'Unterschrift kann nicht gepr�ft werden: ',
	'el' => '�������� ������� ��� ���������: ',
	'eo' => 'Ne povas kontroli subskribon: ',
	'es' => 'Imposible comprobar la firma: ',
	'et' => 'Allkirja ei saa kontrollida: ',
	'fi' => 'Allekirjoitusta ei voi tarkistaa: ',
	'fr' => 'Impossible de v�rifier la signature: ',
	'gl' => 'Non foi posible verifica-la sinatura: ',
	'hu' => 'Nem tudom ellen�rizni az al��r�st: ',
	'id' => 'Tidak dapat memeriksa signature: ',
	'it' => 'Impossibile controllare la firma: ',
	'ja' => '��̾�򸡺��Ǥ��ޤ���: ',
	'pl' => 'Nie mo�na sprawdzi� podpisu: ',
	'pt' => 'Imposs�vel verificar assinatura: ',
	'pt_BR' => 'Imposs�vel verificar assinatura: ',
	'ro' => 'Nu pot verifica semn�tura: ',
	'ru' => 'Не могу проверить подпись: ',
	'sk' => 'Nem��em overi� podpis: ',
	'sv' => 'Kan inte verifiera signaturen: ',
	'tr' => 'İmza kontrol edilemedi: ',
	'zh_CN' => '无法检查签字：',
	'zh_TW' => '�L�k�ˬdñ���G '
);
my %gpg_aka = (
	'be' => '',
	'ca' => '              alias ',
	'cs' => '                alias ',
	'da' => '              alias ',
	'de' => '                    alias ',
	'el' => '                ������ ��� ',
	'eo' => '            alinome ',
	'es' => '                alias ',
	'et' => '                 ka ',
	'fr' => '                alias � ',
	'gl' => '               alias ',
	'hu' => '               azaz ',
	'id' => '              alias ',
	'it' => '                alias ',
	'ja' => '                ��̾��',
	'pl' => '                        alias ',
	'pt' => '                   ou ',
	'pt_BR' => '                   ou ',
	'sk' => '                alias ',
	'sv' => '      även känd som ',
	'tr' => '                den ',
	'zh_CN' => '              亦即“',
	'zh_TW' => '                ��Y '
);
my %gpg_bad = (
	'be' => 'нерэчаісны хэш-альгарытм ',
	'ca' => 'Signatura INCORRECTA de ',
	'cs' => '�PATN� podpis od ',
	'da' => 'D�RLIG signatur fra ',
	'de' => 'FALSCHE Unterschrift von ',
	'el' => '���� �������� ��� ',
	'eo' => 'MALBONA subskribo de ',
	'es' => 'Firma INCORRECTA de ',
	'et' => 'HALB allkiri kasutajalt ',
	'fi' => 'VÄÄRÄ allekirjoitus lähettäjältä ',
	'fr' => 'MAUVAISE signature de � ',
	'gl' => 'Sinatura INCORRECTA de',
	'hu' => 'ROSSZ al��r�s a k�vetkez�t�l: ',
	'id' => 'signature BURUK dari ',
	'it' => 'Firma NON corretta da ',
	'ja' => '��',
	'pl' => 'NIEPOPRAWNY podpis z�o�ony przez ',
	'pt' => 'Assinatura INCORRECTA de ',
	'pt_BR' => 'Assinatura INCORRETA de ',
	'ro' => 'Semn�tur� INCORECT� din ',
	'ru' => 'ПЛОХАЯ подпись от ',
	'sk' => 'ZL� podpis od ',
	'sv' => 'FELAKTIG signatur från ',
	'tr' => 'KÖTÜ imza: ',
	'zh_CN' => '已损坏的签字，来自于“',
	'zh_TW' => '*�l�a* ��ñ���Ӧ۩� '
);
my %gpg_expired = (
	'be' => '',
	'ca' => 'Nota: La clau ha caducat!',
	'cs' => 'Pozn�mka: Skon�ila platnost tohoto kl��e!',
	'da' => 'Bem�rk: Denne n�gle er for�ldet!',
	'de' => 'Hinweis: Dieser Schl�ssel ist verfallen!',
	'el' => '��������: ���� �� ������ ���� �����!',
	'eo' => 'Noto: �i tiu �losilo eksvalidi�is!',
	'es' => 'Nota: �Esta clave ha caducado!',
	'et' => 'M�rkus: See v�ti on aegunud!',
	'fi' => 'Huom: Tämä avain on vanhentunut!',
	'fr' => 'Note: Cette cl� a expir� !',
	'gl' => 'Nota: �Esta chave xa caducou!',
	'hu' => 'Megjegyz�s: Ez a kulcs lej�rt!',
	'id' => 'Catatan: Kunci ini telah berakhir!',
	'it' => 'Nota: questa chiave � scaduta!',
	'ja' => '����: ���θ�����λ�Ǥ�!',
	'pl' => 'Uwaga: Data wa�no�ci tego klucza up�yn�a!',
	'pt' => 'Nota: Esta chave expirou!',
	'pt_BR' => 'Nota: Esta chave expirou!',
	'ro' => 'Not�: Aceast� cheie a expirat!',
	'ru' => 'ПРЕДУПРЕЖДАЮ: Данный ключ просрочен!',
	'sk' => 'Pozn�mka: Skon�ila platnos� tohto k���a!',
	'sv' => 'Obs: Giltighetstiden för denna nyckel har gått ut!',
	'tr' => 'Bilgi: Bu anahtarın kullanım süresi dolmuştu!',
	'zh_CN' => '注意：这把密钥已经过期了！',
	'zh_TW' => '�Ъ`�N�G�o����_�w�g�L���F�I'
);
my %gpg_good = (
	'be' => 'нерэчаісны хэш-альгарытм ',
	'ca' => 'Signatura correcta de ',
	'cs' => 'Dobr� podpis od ',
	'da' => 'God signatur fra ',
	'de' => 'Korrekte Unterschrift von ',
	'el' => '���� �������� ��� ',
	'eo' => 'Bona subskribo de ',
	'es' => 'Firma correcta de ',
	'et' => 'Korrektne allkiri kasutajalt ',
	'fi' => 'Allekirjoitus täsmää lähettäjään ',
	'fr' => 'Bonne signature de � ',
	'gl' => 'Sinatura correcta de ',
	'hu' => 'J� al��r�s a k�vetkez�t�l: ',
	'id' => 'Signature baik dari ',
	'it' => 'Firma valida da ',
	'ja' => '��',
	'pl' => 'Poprawny podpis z�o�ony przez ',
	'pt' => 'Assinatura correcta de ',
	'pt_BR' => 'Assinatura correta de ',
	'ro' => 'Semn�tur� bun� din ',
	'ru' => 'Действительная подпись от ',
	'sk' => 'Dobr� podpis od ',
	'sv' => 'Korrekt signatur från ',
	'tr' => 'Kullanıcı kimliği: ',
	'zh_CN' => '完好的签字，来自于“',
	'zh_TW' => '���n��ñ���Ӧ۩� '
);
my %gpg_bug = (
	'be' => '',
	'ca' => '... a�� �s un bug (',
	'cs' => '... toto je chyba v programu (',
	'da' => '... dette er en fejl (',
	'de' => '... dies ist ein Bug (Programmfehler) (',
	'el' => '... ���� ����� bug (',
	'eo' => '... �i tio estas cimo (',
	'es' => '... esto es un bug (',
	'et' => '... see on viga (',
	'fi' => '...tämä on ohjelmistovika (',
	'fr' => '... cest un bug (',
	'gl' => '... isto � un erro (',
	'hu' => 'Ez egy programhiba... (',
	'id' => '... kesalahan (',
	'it' => '... questo � un bug (',
	'ja' => '... �Х��Ǥ� (',
	'pl' => '... to jest b��d programu (',
	'pt' => '... isto � um bug (',
	'pt_BR' => '... isto � um bug (',
	'ro' => '... acesta este un bug (',
	'ru' => ' ... это ошибка (',
	'sk' => '... toto je chyba v programe (',
	'sv' => '... detta är ett fel i programmet (',
	'tr' => '... bu bir yazılım hatası (',
	'zh_CN' => '……这是个程序缺陷(',
	'zh_TW' => '... �o�O�ӷ岫 ('
);
# }}}
# set the defaults to the C locale
$gpg_WARNING            = 'WARNING: ';
# (yes, the translations in gnupg's po files *are* braindamaged):
$gpg_Warning            = 'WARNING: ';
$gpg_Cantcheck          = 'Can\'t check signature: ';
$gpg_aka                = '                aka ';
$gpg_bad                = 'BAD signature from ';
$gpg_expired            = 'Note: This key has expired!';
$gpg_good               = 'Good signature from';
# (actually, this bugs me quite often since upgrading gpg from v1.0.7):
$gpg_bug                = '... this is a bug (';


# help(): print help text and exit with appropriate exit code
sub help {
    print "Usage: $0 [options] 
  -a              remove ad footers; requires -A
  -A=DIRECTORY    ad footer directory, treat ad footers as signature
  --bigq[=n[,x]]  remove all but x lines of quotes with more than n
                  lines; default is n=30 and x=10
  -c              merge multiple blank lines
  --check[=FLAGS] check various criteria, print error message and quit;
                  see man page for details
  -d, --debug     print notice to syslog when bouncing; requires -p
  --diff          tolerate diffs appended *after* the signature
  -e              force ellipsis for excessive punctuation
  --ftr-ad        enable aggressive ad footer matching; requires -A
  --ftr-ml        enable aggressive mailing list footer matching; req. -L
  -h, --help      show this short help and exit
  -i=INFILE       file to be read; '-' for STDIN (default)
  -k              try to fix \"Kammquotes\"
  --kminl=n       min. line length for wrapped line; requires -k
  --kmaxl=n       max. line length for wrapped line; requires -k
  --kdiff=n       max. length difference between wrapped lines; req. -k
  -L=DIRECTORY    mailling list footer directory, treat mailing list
                  footers as signature
  -l              delete mailing list footer; requires -L
  --lax-security  use unsafe writing method; USE ON YOUR OWN RISK!
  --locale=LOCALE internationalization; currently only used with -Mmutt
  -M, --mua=MUA   turn on special treatment for some mail user agents
  -m              delete MS style TOFU; careful: might be too agressive
  --ms-smart      try to be smart with MS style TOFU; req. -Mmutt and -m
  -o=OUTFILE      file to be written to; '-' for STDOUT (default), 'NONE'
                  for no output at all
  -P=MESSAGE      user defined bounce message; requires -p
  -p[=ADDRESS]    redirect to ADDRESS if no TOFU was found
  --pgp-move      move pgp verification output to bottom; requires -Mmutt
  --pgp-move-vrf  move pgp output if verified and good; requires -Mmutt
  --pgp-short     hide non-relevant pgp key uids; requires -Mmutt
  -r              delete mail header lines
  -S[=n]          supress signatures with more than n lines; 
                  default is $maxsig if n not specified
  -s              delete signature
  --sigsmax[=n]   max number of sigs tolerated, no value for unlimited
  --spass         enable SpamAssassin workaround
  -t              delete traditional style TOFU
  -v, --version   show version string and exit
  -w              delete trailing whitespaces\n";
    exit(EX_USAGE);
}

# version(): print version info and exit with appropriate exit code
sub version {
    print "$0 v".VER.REV." (Rev. ".REL."), Jochen Striepe <t-prot\@tolot.escape.de>
Get the latest version at <http://www.escape.de/users/tolot/mutt/>\n";
    exit(EX_OK);
}

# sigint_handler(): what to do if we receive a single SIGINT
sub sigint_handler {
    $sigint = 1;
}

# esc(): escapes a scalar reference for use in perl regexp
sub esc { ${$_[0]} =~ s/([\[\]\(\)\*\.\-\^\$\@])/\\$1/go; }

# remove_footers(): remove any trailing appearance of footers contained
# in the given directory.
sub remove_footers {
    my $L = shift;        # array of message lines
    my $S = shift;        # array to store removed lines in
    my $F = shift;        # footers dir name
    my $O = shift;        # remove only one footer?
    my $V = shift;        # allow footers match before end of message
    my $off;

    if (!defined $V) {
        for ($off = 0; $#$L>=$off && $$L[$#$L-$off] =~ /^\s*$/; $off++) {;};
    }

    if ($F && scalar(@$L)) {
        if (!opendir(DIR, $F)) { print STDERR "Could not open $F: $!\n"; exit(EX_IOERR); }
        my @feet = grep { /^[^.]/ && -f "$F/$_" } readdir DIR;
        closedir DIR;

        foreach my $f (@feet) {
            if (!open(IN, "$F/$f")) { print STDERR "Could not open $F/$f: $!\n"; exit(EX_IOERR); }
            my @l = <IN>;
            close IN;

            if (!scalar(@l)) { next; }
            for (my $z=0; $z<=$#l; $z++) { chomp($l[$z]); }

            if (defined $V) {
                WIPE: for (my $z=scalar(@$L)-scalar(@l); $z>=0; $z--)
                {
                    if (scalar(@l)+$z<=scalar(@$L)) {
                        my $y = 0;
                        for(my $x=1; $x<=scalar(@l); $x++) {
                            if (index($$L[scalar(@$L)-$x-$z], $l[scalar(@l)-$x])!=0) {
                                $y = 1;
                            }
                        }
                        if (!$y) {
                            unshift(@$S, @$L[$#$L-$#l-$z..$#$L]);
                            splice(@$L, $#$L-$#l-$z);
                            while (scalar(@$L) && $$L[$#$L] =~ /^\s*$/) {
                                unshift(@$S, pop(@$L));
                            }
                            if ($O) { last; } else { goto WIPE; }
                        }
                    }
                }
            }
            else {
                while (scalar(@l)<=scalar(@$L)) {
                    for(my $x=1; $x<=scalar(@l); $x++) {
                        if (index($$L[scalar(@$L)-$x-$off], $l[scalar(@l)-$x])!=0) { 
                            goto FINISH;
                        }
                    }
                    unshift(@$S, @$L[$#$L-$off-$#l..$#$L]);
                    splice(@$L, $#$L-$off-$#l);
                    while (scalar(@$L) && $$L[$#$L] =~ /^\s*$/) {
                        unshift(@$S, pop(@$L));
                    }
                    if ($O) { last; }
                }
                FINISH:
            }
        }
    }
}

# decomb(): Try to detect and fix zig-zag shaped quoting (a.k.a. German
# "Kammquoting").
sub decomb {
    my $L = shift;        # array of message lines
    my $V = shift;        # array with verbatim list
    my $max = 0;        # plausible wraparound pos

    # We scan the whole message first for a plausible common maximum line
    # length where longer lines would be wrapped.
    for (my $x=0; $x<$#$L; $x++) {
        if ($$V[$x]!=1 && $max<length($$L[$x])) { $max = length($$L[$x]); }
    }

    # Next we see if there are plausible wraparounds.    
    for (my $x=0; $x+1<$#$L; $x++) {

        # OK, 
        # * it must not be verbatim,
        # * the 2nd line must not be quoted nor empty nor just 
        #   underlining some part of the line above (using '^')
        #   nor begin with a whitespace,
        # * the 1st line must not end with a hyphen,
        # * the 2nd line must not be some mutt(1) commentary,
        # * there must not be a valid word wrap to produce a longer
        #   1st line (if not quoted),
        # * the 1st and 2nd line together must not be longer than some
        #   magical upper limit nor shorter than some magical lower
        #   bound nor nearly of the same length, and
        # * the 3rd line must not be empty.
        # With all that odds should be quite good that we have an
        # automatedly wrapped line. Please send a note if you have
        # additional good criteria. Thanks.
        if (($$V[$x]!=1 && $$V[$x+1]!=1) &&
            (index($$L[$x+1], $indent)!=0) &&
            ($$L[$x+1] !~ /^$/) &&
            ($$L[$x+1] !~ /^[\s^]/) &&
            ($$L[$x] !~ /-$/) &&
            ($mua ne 'mutt' || $$L[$x+1] !~ /^(?:\e.+?\a)?\[-- .* --]/) &&
            (length($$L[$x])+index($$L[$x+1], ' ')>$max ||
                (index($$L[$x+1], ' ')<0 && length($$L[$x])+length($$L[$x+1])>$max)) &&
            (length($$L[$x])+length($$L[$x+1])<$kmaxl) &&
            (length($$L[$x])+length($$L[$x+1])>$kminl) &&
            (length($$L[$x])-length($$L[$x+1])>$kdiff) &&
            ($$L[$x+2] !~ /^\s*$/))
        {
            $$L[$x] =~ s/\s*$/' ' . $$L[$x+1]/e;
            splice(@$L, $x+1, 1);
            splice(@$V, $x+1, 1);
        }
    }
}

# debigq(): Finds big quotes (more than $n lines quoted) and deletes all
# but $x lines of them.
sub debigq {
    my $L = shift;        # array of message lines
    my $V = shift;        # array with verbatim list
    my $k = 0;

    for (my $i=0; $i<=$#$L; $i++) {

        if ($$V[$i]) { 
            $k = 0;
            next;
        }

        if (index($$L[$i], $indent)==0) { $k++; } else { 
            if ($k>$bigqn) {
                my $x = $k-$bigqx;
                $i -= $k;

                $$L[$i] = "[---=| Quote block shrinked by $0: " .
                    "$x lines snipped |=---]\n";
                $i++;
                splice(@$L, $i, $x-1);
                splice(@$V, $i, $x-1);

                $i++;
            }
            $k = 0;
        }
    }
}

# pgp(): treat mutt(1)'s pgp/gpg output contained in signed or encrypted
# messages
sub pgp {

    sub verified {
        my $L = shift;    # message body
        my $X = shift;    # start line
        my $Z = shift;    # end line

		my $ok = 0;

        while ($X<$Z) {
            if ($$L[$X] =~ /^gpg:\s(?:$gpg_WARNING|$gpg_Warning|$gpg_bad|$gpg_Cantcheck|$gpg_expired)/o)
                { return 0; }
            if ($$L[$X] =~ /^gpg:\s$gpg_bug/o)
                { return 0; }
            if ($$L[$X] =~ /^gpg:\s$gpg_good/o)
                { $ok = 1; }
            $X++;
        }

        return $ok;
    }

    my $L = shift;        # message body
    my $V = shift;        # verbatim list
    my $H = shift;        # headers

    my @tmp = ();
    my $tmp = 0;

    for (my $x=0; $x<scalar(@$L); $x++) {
        if ($$V[$x]) { next; }

        if ($$L[$x]=~/^(?:\e.+?\a)?(?:$mutt_pgpoutstart)/o)
        {
            my $from;
            for (my $m=0; $m<scalar(@$H); $m++) {
                if ($$H[$m] =~ /^From:/) {
                    $from = $$H[$m];
                    $m++;
                    while ($$H[$m] =~ /^\s/) { $from .= $$H[$m]; $m++; }
                    last;
                }
            }
            ($from) = $from=~m/([a-z\d][a-z_\d\+-\.]*\@(?:[a-z_\d\+-\.]+\.)+[a-z]{2,})/i;
            esc(\$from);

            my $uid = 1;

            for (my $i=$x+1; $i<scalar(@$L); $i++) {
                if ($pgpshort && $$L[$i] =~ /^gpg:\s$gpg_aka/o) { $uid++; }

                if ($pgpshort && $uid>1 &&
                    $$L[$i] =~ /^gpg:\s$gpg_aka/o && $$L[$i] !~ /$from/)
                { 
                    splice(@$L, $i, 1);
                    splice(@$V, $i, 1);
                    $i--;
                }
                elsif ($$L[$i]=~/^(?:\e.+?\a)?(?:$mutt_pgpoutend)/o)
                {
                    if ($pgpmove ||
                        ($pgpmovevrf && (!$sigint) && verified($L, $x+1, $i)))
                    {
                        push(@{$tmp[++$tmp]}, "\n", @$L[$x..($i+1)]);
                        splice(@$L, $x, $i-$x+2);
                        splice(@$V, $x, $i-$x+2);
                        $i -= $#{$tmp[$tmp]}-2;
                    }
                    $x = $i;
                    last;
                }
            }
        }
        elsif ($tmp &&
            $$L[$x]=~/^(?:\e.+?\a)?(?:$mutt_pgpencrypted|$mutt_pgpclearsigned|$mutt_pgpsigned)/o)
        {
            splice(@$L, $x+1, 0, @{$tmp[$tmp]});
            for (my $i=$x; $i<scalar(@{$tmp[$tmp]}); $i++) {
                splice(@$V, $x+1, 0, (0));
            }
            $x += scalar(@{$tmp[$tmp--]});
            pop(@tmp);
        }
    }

    while ($tmp>0) {
        push(@$L, @{$tmp[$tmp--]});
        pop(@tmp);
        for (my $i=$#$V; $i<$#$L; $i++) { push(@$V, 0); }
    }
}

# write_msg(): output
sub write_msg {
    my $O = shift;
    my $l;

    if ((!$lax) && ($O =~ /^>(.*)/) && ($1 ne '-')) {
        if (!sysopen(OUT, $1, O_EXCL|O_CREAT|O_WRONLY)) { 
            print STDERR "Could not open $1: $!\n"; exit(EX_IOERR);
        }
    }
    elsif (!open(OUT, $O)) { 
        print STDERR "Could not open $O: $!\n"; exit(EX_IOERR);
    }
    while (scalar(@_)) {
        $l = shift;
        if (defined $l) {
            $^W = 0;
            print OUT @$l;
            $^W = 1;
        }
    }
    close OUT;
}

# process_msg(): This one proc does *everything* what has to be done with
# the lines of the message
sub process_msg {
    my $lines = shift;

    my ($j, $x, $verb) = (0, 0, 0);
    my (@ads, @hdr, @bo1, @bo2, @ftr, @sig, @vrb, @att) = 
        ((), (), (), (), (), (), (), (), ());

    # First, remove and store lines we might need later...
    # Remove headers:
    for ($x=0; $x<$#$lines; $x++) { if (@$lines[$x] =~ /^$/) { last; }; }
    @hdr = @$lines[0..$x];
    splice(@$lines, 0, $x+1);
    # remember the original body lines count
    my $linecount = scalar(@$lines);


    # See if we have a multipart content type. If yes, see if it is already
    # ripped (e.g. by mutt(1)), otherwise only leave the first part if it
    # is plain text (if not, we are done - non-text messages are not our
    # business).
    if ($mua ne 'mutt') { 
        for ($x=0; $x<scalar(@hdr); $x++) {
            if ($hdr[$x] =~ /^Content-Type:\s+(.*)$/i) {
                my $foo = $1;

                if ($foo =~ /^multipart\//i) {
                    undef $foo;

                    if ($hdr[$x] =~ /\Wboundary="([^"]+)"/i) { $foo = $1; }
                    else { 
                        for (my $z=1; $x+$z<@hdr && $hdr[$x+$z]=~/^\s/; $z++) {
                            if ($hdr[$x] =~ /\Wboundary="?([^"\s]+)"?$/i) { 
                                $foo = $1;
                                last;
                            }
                        }
                    }

                    if (defined $foo) {
                        for (my $x=0; $x<scalar(@$lines); $x++) {
                            if (index($$lines[$x], '--'.$foo)!=0) { next; }

                            my $bar = 'text/plain';
                            for ($x++; $x<@$lines && $$lines[$x]!~/^$/; $x++)
                            {
                                if ($$lines[$x] =~ /^Content-Type:\s+(.*)/i) { 
                                    $bar = $1;
                                }
                            }
                            if ($x>=scalar(@$lines)) { exit(EX_DATAERR); }

                            if ($bar =~ /^text\/plain/i) {
                                my $z;
                                for ($z=1; $x+$z<@$lines; $z++) {
                                    if (index($$lines[$x+$z], '--'.$foo)==0) {
                                        last;
                                    }
                                }
                                if ($x+$z>=scalar(@$lines)) { exit(EX_DATAERR); }

                                @bo2 = @$lines[$x+$z..$#$lines];
                                splice(@$lines, $x+$z);
                                if ($$lines[$#$lines] =~ /^\s*$/) {
                                    unshift(@bo2, pop @$lines);
                                }
                                @bo1 = @$lines[0..$x];
                                splice(@$lines, 0, $x+1);
                                last;
                            }
                            else { 
                                write_msg(($mda?'|'.SENDMAIL." $mda":">$ofile"),
                                    ($hdrs?undef:\@hdr), $lines);
                                exit;
                            }
                        }
                    }
                }
                last;
            }
        } 
    }


    # Protect verbatims:
    $verb = 0;
    for ($x=0; $x<scalar(@$lines); $x++) {
        if ($$lines[$x] =~ /^\s*#v([+-])$/) { 
            $verb = $1 eq '+' ? 1 : 0;
            $vrb[$x] = 1;
        } else { $vrb[$x] = $verb; }
    }

    # Calculate quoting ratio (with respect to verbatims):
    if ($check && scalar(@$lines)) {
        my ($y, $z) = (0, 0);
        for ($x=0; $x<scalar(@$lines); $x++) {
            if (!$vrb[$x]) {
                $z++;
                if ($$lines[$x] =~ /^$indent/) { $y++; }
            }
        }
        $y = $y/$z;

        if ($y>=$check_ratio) {
            print $msg_ratio;
            exit EX_UNAVAILABLE;
        }
    }

    # Remove ML footers:
    remove_footers($lines, \@ftr, $footers, undef, $ftr_ml);

    # Remove ad footers:
    remove_footers($lines, \@ads, $ads, undef, $ftr_ad);

    if ($mua eq 'mutt') {
        # See if we find pgp output generated by mutt before we scramble
        # the thing. If yes, see if we can beautify it.
        if ($pgpshort || $pgpmove || $pgpmovevrf) { pgp($lines, \@vrb, \@hdr); }

        # Remove all but the first attachment (if this is text/plain)
        # mutt did introduce (bah!). Remember, all this ugliness could
        # be replaced with a proper and clean edit_filter patch in 
        # mutt(1) itself...
        for ($x=$#$lines; $x>=0; $x--) {
            if ($vrb[$x]) { next; }
            # The following regexp's are quite ugly because for most users
            # these lines are coloured using termcap... (bah!)
            if (($$lines[$x] =~ /^(?:\e.+?\a)?$mutt_attachment(\d+)(?::.*)? \-\-\]/o &&
                    (($1 ne '1') ||
                    ($x<$#$lines &&
                        $$lines[$x+1] !~ /^(?:\e.+?\a)?(?:$mutt_contenttype)(?:text\/plain|application\/pgp)/io))) ||
                ($$lines[$x] =~ /^(?:\e.+?\a)?(?:$mutt_pgpsigned|$mutt_pgpclearsigned|$mutt_pgpencrypted)/o))
            { 
                # Strip attachments to prepare further processing
                unshift(@att, @$lines[$x..$#$lines]);
                splice(@$lines, $x);
                # Try to fix trailing empty lines
                while (scalar(@$lines) && $$lines[$#$lines] =~ /^(?:\e.+?\a)?\s*$/) { 
                    unshift(@att, pop(@$lines));
                }

                # Remove ML and ad footers within attachments:
                my @tmp;
                if ($ml) { remove_footers($lines, \@tmp, $footers, undef); }
                if ($ad) { remove_footers($lines, \@tmp, $ads,     undef); }
                $x = scalar(@$lines);
            }
        }

        # care about the rest
        if (scalar(@att)) {
            for ($x=0; $x<$#att; $x++) {
                if ($vrb[scalar(@$lines)+$x]) { next; }

                # Pipe message/rfc822 parts to another instance of
                # process_msg() for further processing.
                # Please note that we cannot see what a hierarchy the
                # original message had -- if there were message/rfc822
                # parts within other message/rfc822 parts constellations
                # can occur which we cannot resolve. Therefore we simply
                # do not even try to be smart. This should work for most
                # situations.
                # The following regexp is quite ugly because for most
                # users the line is coloured using termcap... (bah!)
                if ($att[$x]=~/^(?:\e.+?\a)?$mutt_attachment\d+.* --\]/o &&
                    $att[$x+1] =~ /^(?:\e.+?\a)?(?:$mutt_contenttype)message\/rfc822/o)
                {
                    $x += 2;
                    while ($att[$x] !~ /^\s*$/) { $x++; }
                    $x++;

                    my @tmp = @att[$x..$#att];
                    process_msg(\@tmp);
                    splice(@att, $x, scalar(@att)-$x, @tmp);
                    $x += scalar(@tmp);
                }
            }
        }
    }

    # Remove signature:
    if (scalar(@$lines)) { 
        my $sn = 0;
        for ($x = $#$lines; $x>=0; $x--) {
            if ((!$vrb[$x]) && $$lines[$x] =~ /^-- $/) {
                if ($diff) {
                    for (my $i=1; $x+$i+1<scalar(@$lines); $i++) {
                        if ($$lines[$x+$i] =~ /^\-\-\-\s+\S/ &&
                            $$lines[$x+$i+1] =~ /^\+\+\+\s+\S/)
                        {
                            $sig = 0;
                            unshift(@sig, @$lines[$x..$#$lines]);
                            splice(@$lines, $x);
                            last;
                        }
                    }
                    if (scalar(@sig)) {
                        if (defined($sign) && ++$sn==$sign) { last; } else { next; }
                    }
                }

                if ($sig || ($lsig && ($#$lines-$x>$lsig))) {
                    if ($lsig && !$sig) {
                        unshift(@sig, "[---=| Overlong signature removed by $0: " .
                            (scalar(@$lines)-$x) . " lines snipped |=---]\n");
                    }
                    splice(@$lines, $x);
                }
                else {
                    unshift(@sig, @$lines[$x..$#$lines]);
                    splice(@$lines, $x);
                }
                if (defined($sign) && ++$sn==$sign) { last; } else { next; }
            }
        }
    }

    # See if there is some Kammquoting to fix:
    if ($kamm) { decomb($lines, \@vrb); }

    # Now care about TOFU.
    # One common mispractice is M$ style TOFU:
    if ($ms) {
        # bloat this array if you want more internationalization:
        my @tofu = ('Original Message',
                    'Urspr�ngliche Nachricht',
                    'Ursprungliche Nachricht',
                    'Mensagem original',
                    'Ursprungligt meddelande',
                    'Oorspronkelijk bericht',
                    'Message d\'origine',
                    'Forwarded message',
                    'Weitergeleitete Nachricht / Forwarded Message');
        my $k = 0;    # any text above?
        my $tmp = 0;  # flagged if inside PGP output

        DONE: for ($x=0; $x<scalar(@$lines); $x++) { 
            if (!$vrb[$x]) {
                foreach my $tmp (@tofu) {
                    if ($$lines[$x] =~ /^-+\s?$tmp\s?-+/) { 
                        $x++;
                        $trad = 0;
                        $bigqn = 0;
                        last DONE; 
                    }
                }

                if ((!$k) && $$lines[$x] !~ /^\s*$/o &&
                    ((!$mua) ||
                     ($mua eq 'mutt' &&
                         $$lines[$x] !~ /^(?:\e.+?\a)?(?:$mutt_attachment)/o &&
                         $$lines[$x] !~ /^(?:\e.+?\a)?(?:$mutt_contenttype)/o)) &&
                    ((!$spass) || $$lines[$x]!~/^$spass_prefix/o))
                {
                    if ($mua eq 'mutt' && (!$tmp) &&
                        $$lines[$x] =~ /^(?:\e.+?\a)?(?:$mutt_pgpoutstart)/o) {
                        $tmp = 1; 
                    } elsif ($mua eq 'mutt' && $tmp && 
                        ($$lines[$x] =~ /^(?:\e.+?\a)?(?:$mutt_beginsigned)/o ||
                         $$lines[$x] =~ /^(?:\e.+?\a)?(?:$mutt_pgpclearsigstart)/o)) {
                        $tmp = 0;
                    } elsif (!$tmp) {
                        $k = 1;
                    }
                }
            }
        }

        # try to avoid false positives and only delete m$ style tofu if
        # there is text above
        if ($k) {
            if (!$ms_smart) { goto CLEAN; }

            # first, see if there is pgp stuff inside the tofu:
            my $p = 0;    # levels of pgp signed parts

            for (my $i=$x+1; $i<scalar(@$lines); $i++) {
                if ($$lines[$i] =~ /^(?:\e.+?\a)?(?:$mutt_pgpclearsigstart)/o) {
                    $p++;
                }
            }
            if ($p) {
                STAIRS: for (my $i=0; $i<scalar(@att); $i++) {
                    if ($p==0 && $att[$i] =~ /^(?:\e.+?\a)?\[\-\-\ /o) {
                        splice(@att, 0, $i);
                        unshift(@att, "\n");
                        goto CLEAN;
                    } elsif ($att[$i] =~ /^(?:\e.+?\a)?(?:$mutt_pgpclearsigned)/o) {
                        splice(@att, 0, $i+1);
                        $p--;
                        goto STAIRS;
                    }
                }
                splice(@att);
            }

            # now removing is safe:
            CLEAN: $j = scalar(@$lines)-$x;
            splice(@$lines, $x);
        }
    }

    # Nothing? Then try traditional TOFU (deleting M$ style TOFU is done
    # much more aggressively, so we won't need to search any more if we
    # did find some):
    if ($trad && (!$j) && !$vrb[$#$lines]) {
        if (scalar(@$lines) && $$lines[$#$lines] =~ /^\s*$/) { 
            unshift(@sig, pop(@$lines));
        }

        my $k;
        my $x = 1;

        for (my $i=$#$lines; $i>=0; $i--) {
            if ($$lines[$i] =~ /^$indent/o) {
                $j++;
                $k = $i;
            }
            elsif ($$lines[$i] !~ /^\s*$/) { last; }
        }

        if ($j) {
            # if there is no text above, we will assume the message is meant
            # as forwarding and therefore OK
            for (my $i=$k-1; $i>=0; $i--) {
                if ($$lines[$i] !~ /^\s*$/o) {
                   $x = 0;
                   last;
                }
            }
            if ($x) {
                $j = 0;
            } else {
                splice(@$lines, $k);
            }
        }
    }

    # OK, if we found TOFU, we will leave a message that we were here...
    if ($j) { 
        # make sendmail bounce if we shall be picky 
        # and indeed found something:
        if ($mda) { 
            if ($mda ne '1') { 
                print STDERR $boun;

                if ($sysl) {
                    eval { require Sys::Syslog; }; 
                    if ($@) { warn $@; } else {
                        Sys::Syslog::setlogsock('unix');
                        Sys::Syslog::openlog("$0[$$]", 'pid', 'mail');
                        Sys::Syslog::syslog('debug', 'bounced message %s', $hdr[0]);
                        Sys::Syslog::closelog();
                    }
                }
            }

            exit EX_BOUNCE;
        }

        # if we were invoked just for checking and indeed found something,
        # print out the error message and quit:
        if ($check) {
            print $msg_quote;
            exit EX_UNAVAILABLE;
        }

        push(@$lines, "[---=| TOFU protection by $0: " .
            "$j lines snipped |=---]\n");
    }
    elsif ($mda eq '1') { exit EX_OK; }

    # Care for huge blocks of quoted original message:
    if ($bigqn) { debigq($lines, \@vrb); }

    # Care for trailing whitespaces:
    if ($trsp) {
        for ($x=0; $x<scalar(@$lines); $x++) { 
            if (!$vrb[$x]) { $$lines[$x] =~ s/[\ \t]+$//; }
        }
    }

    # Care for punctuation abuse:
    if ($elli) {
        for ($x=0; $x<scalar(@$lines); $x++) { 
            if (!$vrb[$x]) { $$lines[$x] =~ s/(([.?!])\2\2)\2+/$1/eg; }
        }
    }

    # (Nearly) at last care for multiple blank lines. (Do not do this
    # earlier -- the way it is done right now would screw up the verbatim
    # list)
    if ($cr) {
        my $t = 0;
        for ($x=scalar(@$lines)-1; $x>=0; $x--) {
            if ((!$vrb[$x]) && $$lines[$x] =~ /^\s*$/) { 
                if ($t<2) { $t++; } else { splice(@$lines, $x, 1); }
            }
            else { $t = 0; }
        }
    }

    # Everything changing the body is done now. Time to fix the line count
    # header so naive clients do not get confused. Just to be sure, append
    # the old line count to X-headers.
    my $l = scalar(@bo1) + scalar(@$lines) + scalar(@att) + scalar(@bo2) +
                (!$sig?scalar(@sig):0) + (!$ml?scalar(@ftr):0) + 
                (!$ad?scalar(@ads):0);
    if ($linecount-$l!=0) {
        for ($x=0; $x<scalar(@hdr); $x++) {
            if ($hdr[$x] =~ 
                s/^(Lines:\s+)(\d+)/$1.($2-$linecount+$l)/e)
            { 
                $hdr[$#hdr] = "X-Old-Lines: $2\n";
                push(@hdr, "\n");
            }
        }
    }

    # Finally, before leaving we put everything back in right order.
    unshift(@$lines, (!$hdrs?@hdr:()), @bo1);
    push(@$lines, (!$sig?@sig:()), (!$ad?@ads:()), (!$ml?@ftr:()), @att,
        @bo2);
}


# environment
my $locale = $ENV{'LC_ALL'}?$ENV{'LC_ALL'}:($ENV{'LC_MESSAGES'}?$ENV{'LC_MESSAGES'}:$ENV{'LANG'});

# command line switches
($ad, $ads, $bigqn, $bigqx, $check, $cr, $sysl, $diff, $elli, $footers, $lax,
    $ml, $ms, $ms_smart, $mda, $mua, $hdrs, $kamm, $lsig, $sig, $sigint,
    $spass, $trad, $trsp) =
    (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
my $ifile   = '-';    # use STDIN if nothing specified

# get command line params:
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'.
    ' s t v w bigq:s check:s debug>d diff ftr-ad ftr-ml help>h kminl=i'.
    ' kmaxl=i kdiff=i lax-security locale=s ms-smart mua>M pgp-short'.
    ' pgp-move pgp-move-vrf sigsmax:i spass version>v');
while (my ($opt, $val, $pretty) = nextOption()) {
    if    ($opt eq 'a')     { $ad = 1; }
    elsif ($opt eq 'A')     { $ads = $val; }
    elsif ($opt eq 'bigq')  { 
        if ($val !~ /^(?:(\d+)(?:,(\d+))?)?$/) { help(); }
        $bigqn = $1?$1:30; 
        $bigqx = $2?$2:10;
        if ($bigqn<=0 || $bigqx<=0 || $bigqn<=$bigqx) { help(); }
    }
    elsif ($opt eq 'c')     { $cr = 1; }
    elsif ($opt eq 'check') {
        $check = 1;
        while ($val && $val =~ s/^([^,\s]+)(?:,(\S+))?$/$2/) {
            my $foo = $1;

            if ($foo =~ /^ratio=(0?\.\d+)$/) {
                $check_ratio = $1?$1:1;
            }
        }
    }
    elsif ($opt eq 'd')     { $sysl = 1; }
    elsif ($opt eq 'diff')  { $diff = 1; }
    elsif ($opt eq 'e')     { $elli = 1; }
    elsif ($opt eq 'ftr-ad') { $ftr_ad = 1; $ad = 1; }
    elsif ($opt eq 'ftr-ml') { $ftr_ml = 1; $ml = 1; }
    elsif ($opt eq 'i')     { $ifile = $val; }
    elsif ($opt eq 'k')     { $kamm = 1; }
    elsif ($opt eq 'kminl') { $kminl = $val; $kamm = 1; }
    elsif ($opt eq 'kmaxl') { $kmaxl = $val; $kamm = 1; }
    elsif ($opt eq 'kdiff') { $kdiff = $val; $kamm = 1; }
    elsif ($opt eq 'L')     { $footers = $val; }
    elsif ($opt eq 'l')     { $ml = 1; }
    elsif ($opt eq 'lax-security') { $lax = 1; }
    elsif ($opt eq 'locale') { $locale = $val; }
    elsif ($opt eq 'm')     { $ms = 1; }
    elsif ($opt eq 'ms-smart') { $ms_smart = 1; $ms = 1; }
    elsif ($opt eq 'M') {
        $mua = lc($val);

        if ($mua eq 'mutt') {
            # mutt still displays the message when ^C'ing pgp verification:
            $SIG{'INT'} = 'sigint_handler';
        }
    }
    elsif ($opt eq 'o')     { $ofile = $val; }
    elsif ($opt eq 'P')     { $boun = $val; }
    elsif ($opt eq 'p')     { $mda = $val ? $val : '1'; }
    elsif ($opt eq 'pgp-short') { $pgpshort = 1; }
    elsif ($opt eq 'pgp-move') { $pgpmove = 1; }
    elsif ($opt eq 'pgp-move-vrf') { $pgpmovevrf = 1; }
    elsif ($opt eq 'r')     { $hdrs = 1; }
    elsif ($opt eq 'S')     { $lsig = $val ? $val : $maxsig; }
    elsif ($opt eq 's')     { $sig = 1; }
    elsif ($opt eq 'sigsmax') { $sign = $val ? $val : undef; }
    elsif ($opt eq 'spass') { $spass = 1; }
    elsif ($opt eq 't')     { $trad = 1; }
    elsif ($opt eq 'v')     { version(); }
    elsif ($opt eq 'w')     { $trsp = 1; }
    else                    { help(); }
}
Getopt::Mixed::cleanup();
if (($ml && $footers eq '')||    # no -l without -L
    ($ad && $ads eq '')||        # no -a without -A
    ($ifile eq '')||             # no empty -i
    ($ofile eq ''))              # no empty -o
{ help(); }


if ($mua eq 'mutt') {
    if (defined $locale && $locale ne '' && $locale ne 'C' && $locale ne 'POSIX') {
        foreach my $key (keys %mutt_attachment) {
            if ($locale =~ /^$key/) {
                if ($mutt_attachment{$key}) 
                    { $mutt_attachment = $mutt_attachment{$key}; }
                if ($mutt_contenttype{$key})
                    { $mutt_contenttype = $mutt_contenttype{$key}; }
                if ($mutt_pgpsigned{$key})
                    { $mutt_pgpsigned = $mutt_pgpsigned{$key}; }
                if ($mutt_beginsigned{$key})
                    { $mutt_beginsigned = $mutt_beginsigned{$key}; }
                if ($mutt_pgpclearsigned{$key})
                    { $mutt_pgpclearsigned = $mutt_pgpclearsigned{$key}; }
                if ($mutt_pgpclearsigstart{$key})
                    { $mutt_pgpclearsigstart = $mutt_pgpclearsigstart{$key}; }
                if ($mutt_pgpencrypted{$key})
                    { $mutt_pgpencrypted = $mutt_pgpencrypted{$key}; }
                if ($mutt_pgpoutstart{$key})
                    { $mutt_pgpoutstart = $mutt_pgpoutstart{$key}; }
                if ($mutt_pgpoutend{$key})
                    { $mutt_pgpoutend = $mutt_pgpoutend{$key}; }
                last;
            }
        }
        foreach my $key (keys %gpg_WARNING) {
            if ($locale =~ /^$key/) {
                if ($gpg_WARNING{$key})
                    { $gpg_WARNING = $gpg_WARNING{$key}; }
                if ($gpg_Warning{$key})
                    { $gpg_Warning = $gpg_Warning{$key}; }
                if ($gpg_Cantcheck{$key})
                    { $gpg_Cantcheck = $gpg_Cantcheck{$key}; }
                if ($gpg_aka{$key})
                    { $gpg_aka = $gpg_aka{$key}; }
                if ($gpg_bad{$key})
                    { $gpg_bad = $gpg_bad{$key}; }
                if ($gpg_expired{$key})
                    { $gpg_expired = $gpg_expired{$key}; }
                if ($gpg_good{$key})
                    { $gpg_good = $gpg_good{$key}; }
                last;
            }
        }
    }

    esc(\$mutt_attachment);
    esc(\$mutt_contenttype);
    esc(\$mutt_pgpsigned);
    esc(\$mutt_beginsigned);
    esc(\$mutt_pgpclearsigned);
    esc(\$mutt_pgpclearsigstart);
    esc(\$mutt_pgpencrypted);
    esc(\$mutt_pgpoutstart);
    esc(\$mutt_pgpoutend);

    esc(\$gpg_WARNING);
    esc(\$gpg_Warning);
    esc(\$gpg_Cantcheck);
    esc(\$gpg_aka);
    esc(\$gpg_bad);
    esc(\$gpg_expired);
    esc(\$gpg_good);
    esc(\$gpg_bug);
}
else {
    if ($ms_smart || $pgpshort || $pgpmove || $pgpmovevrf) { help(); }
}

esc(\$spass_prefix);


# Read message:
if (!open(IN, $ifile)) { print STDERR "Could not open $ifile: $!\n"; exit(EX_IOERR); }
my @message = <IN>;
close IN;

# this should be self-explanatory:
process_msg(\@message);

# Finally, print clean lines:
if ($ofile ne 'NONE') {
    write_msg(($mda?'|'.SENDMAIL." $mda":">$ofile"), \@message);
}

# vim600:set foldmethod=marker:
# eof