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|
#! /usr/bin/perl -wT
use warnings;
use strict;
use Digest::SHA qw(sha256_hex);
use Email::Valid;
use String::Random;
use CGI qw(param);
#use CGI::Carp qw(fatalsToBrowser);
sub escape_arobase {
my $mailaddress = shift;
my $arobase = '@';
my $espaced_arob = q{\@};
my $escapedmailaddress = $mailaddress;
$escapedmailaddress =~ s/$arobase/$espaced_arob/;
return $escapedmailaddress;
}
sub untaint_cgi_filename {
my $filename = shift;
if ($filename =~ /^([-\@\w.\/]+)$/) {
#data untainted
$filename = $1;
}
else {
die "$!";
}
chomp $filename;
return $filename;
}
sub notif_if_defined{
my $notif = shift;
if (defined $notif){
return $notif;
}
}
delete @ENV{qw(IFS PATH CDPATH BASH_ENV)};
# execute 'printf "yourpassword" | sha256sum' on a terminal
# and copy the long string
$ENV{'PATH'} = '/usr/bin';
my $HAS_MAILSERVER = 0;
my $SRV_NAME = $ENV{'SERVER_NAME'};
my $HTML_CONTENT_TYPE_HEADER = 'Content-type: text/html';
my $HTML_CHARSET = 'UTF-8';
my $HTML_CSS = '/gpigeon.css';
my $mymailaddr = q{your_mail_address_goes_here};
my $mymailaddr_pw = q{your_mail_address_password_goes_here};
my $mymail_smtp = q{smtp_domain_goes_here};
my $mymail_smtport = q{smtp_port_goes_here};
my $mymail_gpgid = q{gpgid_goes_here}; #0xlong keyid form
my $PASSWD_HASH = q{password_hash_goes_here};
my $mymailaddr_escaped = escape_arobase($mymailaddr);
my $msg_form_char_limit = 3000;
my @text_strings = ('Succesfull deletion!',
'Address',
'is valid!',
'is not valid !',
'Unknown', # displays on main page table when supposed sender isn't identified
'Message length must be under$msg_form_char_limit chars.',
'One time GPG messaging form', # title for generated links
'Type your message below, ',
'Send to me',
'Generated a link for', #displays if link gen is successful
'Link to your one time GPG messaging form', # mail subject when clicking a mailto: link in table
'Your link is ', # message body when clicking a mailto: link in table
'Delete', # text on button for deleting links
'Damn! I cannot open ', # message when file opening fails
'GPIGEON.CGI: generate one time GPG messaging links !', # main page title!
'Hi and welcome.', # a greeting at the top of the main page.
'Disconnect', # disconnect button text on main page
'Refresh', # refresh button text
'Generate link', #link generation button text
"Generated links by you, <b>$mymailaddr</b>:", # label above links table
'Delete all links', # delete all links button text
'Link', # first table header, 'Link'
'For', # second table header, 'For'
'Deletion', # third table header, 'Delete'
'Deletion failed and here is why : ',
'Cannot send message : message length must be under ' .$msg_form_char_limit . ' characters.',
'Cannot send message : message is empty. You can type up to ' . $msg_form_char_limit . ' characters.'
);
my $cgi_query_get = CGI->new;
my $PASSWD = $cgi_query_get->param('password');
my $psswd_formfield = '<input type="hidden" name="password" value="' . $cgi_query_get->param('password') . '">',"\n";
my ($notif_de_creation, $notif_mail_valide, $notif_suppression) = undef;
my @created_links = ();
if ( sha256_hex($PASSWD) eq $PASSWD_HASH and $ENV{'REQUEST_METHOD'} eq 'POST'){
if (defined $cgi_query_get->param('supprlien')){
my $pending_deletion = $cgi_query_get->param('supprlien');
my $gpg_form_fn = "./l/$pending_deletion";
if (unlink untaint_cgi_filename($gpg_form_fn)){
$notif_suppression='<span style="color:green">'.$text_strings[0].'</span>';
}
else {
$notif_suppression='<span style="color:red">'. $text_strings[24] . $gpg_form_fn.':'. $! .'</span>';
}
}
if (defined $cgi_query_get->param('supprtout')){
opendir my $link_dir_handle, './l' or die "Can't open ./l: $!";
while (readdir $link_dir_handle) {
if ($_ ne '.' and $_ ne '..'){
my $gpg_form_fn = "./l/$_";
unlink untaint_cgi_filename($gpg_form_fn) or die "$!";
$notif_suppression='<span style="color:green">'. $text_strings[0] .'</span>';
}
}
closedir $link_dir_handle;
}
if (defined $cgi_query_get->param('mail')){
my $non_gpguser = scalar $cgi_query_get->param('mail');
if ( Email::Valid->address($non_gpguser) ){
$notif_mail_valide = '<span style="color:green">'. $text_strings[1] . ' '. $non_gpguser.' '. $text_strings[2] . '</span>';
my $escaped_non_gpguser = escape_arobase($non_gpguser);
my $random_mailform_fn_str = String::Random->new;
my @mailform_fn_str_buffer = ();
for (1..5){
push @mailform_fn_str_buffer,
$random_mailform_fn_str->randregex('\w{1,15}[0-9]{1,15}');
}
my $mailform_fn_str_buffer_nospace = join('',@mailform_fn_str_buffer);
my $GENERATED_FORM_FILENAME = "$mailform_fn_str_buffer_nospace.cgi";
my $MAILFORM_LINK = "http://$SRV_NAME/cgi-bin/l/$GENERATED_FORM_FILENAME";
my $MAILFORM_RELPATH = "./l/$GENERATED_FORM_FILENAME";
if (open my $gpg_form_fh, ">", $MAILFORM_RELPATH){
print $gpg_form_fh '#! /usr/bin/perl -wT',"\n\n",
' my $non_gpguser = q{'. $non_gpguser .'};', "\n",
'delete @ENV{qw(IFS PATH CDPATH BASH_ENV)};', "\n",
'$ENV{\'PATH\'}="/usr/bin";',
'use warnings;', "\n",
'use strict;',"\n",
'use GPG;',"\n",
'#use CGI::Carp qw(fatalsToBrowser);',
'use CGI qw(param);', "\n",
'my $cgi_query_get = CGI->new;', "\n",
'my ($msg_form, $enc_msg, $error_processing_msg,$msg_form_char_limit) = undef;', "\n",
'$msg_form_char_limit = '. $msg_form_char_limit . ' ;', "\n",
'$msg_form = $cgi_query_get->param(\'msg\');', "\n",
'my $length_msg_form = length $msg_form;', "\n",
'if ($length_msg_form > $msg_form_char_limit){', "\n",
' $error_processing_msg = q{<span style="color:red"><b>'. $text_strings[25] .'.</b></span>};', "\n",
'} elsif ( $length_msg_form eq 0 ){', "\n",
' $error_processing_msg = q{<span style="color:red"><b>'. $text_strings[26] . '.</b></span>};', "\n",
'} else {', "\n",
'if (defined $cgi_query_get->param(\'msg\') and $ENV{\'REQUEST_METHOD\'} eq \'POST\'){',"\n",
' $msg_form =~ tr/\r//d;', "\n",
' my $gpg = new GPG(gnupg_path => "/usr/bin", homedir => "/usr/share/www-data/.gnupg/");', "\n",
' $enc_msg = $gpg->encrypt("De la part de " . $non_gpguser . ":\n". $msg_form, \''. $mymail_gpgid .'\') or die $gpg->error();', "\n";
if ($HAS_MAILSERVER){
undef $mymailaddr_escaped;
print $gpg_form_fh 'use Mail::Sendmail;',
'%mail = ( To => \''.$mymailaddr.'\',' , "\n",
' From => \''.$mymailaddr.'\',', "\n",
' Subject => \'Gpigeon\' ', "\n",
' Message => "$enc_msg\n" ', "\n",
');', "\n",
'sendmail(%mail) or die $Mail::Sendmail::error;', "\n";
}
else {
print $gpg_form_fh 'use Net::SMTP;',"\n",
'use Net::SMTPS;',"\n",
'my $smtp = Net::SMTPS->new(\''. $mymail_smtp .'\', Port => \''. $mymail_smtport .'\', doSSL => \'ssl\', Debug_SSL => 0);', "\n",
'$smtp->auth(\''. $mymailaddr .'\', \''. $mymailaddr_pw .'\') or die;', "\n",
'$smtp->mail(\''. $mymailaddr .'\') or die "Net::SMTP module has broke: $!.";', "\n",
'if ($smtp->to(\''. $mymailaddr .'\')){', "\n",
' $smtp->data();', "\n",
' $smtp->datasend("To: '. $mymailaddr_escaped .'\n");', "\n",
' $smtp->datasend("\n");', "\n",
' $smtp->datasend("$enc_msg\n");', "\n",
' $smtp->dataend();', "\n",
'}', "\n",
'else {', "\n",
' die $smtp->message();', "\n",
'}', "\n";
}
print $gpg_form_fh 'unlink "../' . $MAILFORM_RELPATH . '";', "\n",
'print "Location: /merci/index.html\n\n";', "\n",
'}', "\n",
'}', "\n",
'print "Content-type: text/html", "\n\n";', "\n",
'print q{<!DOCTYPE html>', "\n",
'<html>', "\n",
' <head>', "\n",
' <link rel="icon" sizes="48x48" type="image/ico" href="/favicon.ico">', "\n",
' <link rel="stylesheet" type="text/css" href="'. $HTML_CSS .'">',
' <meta http-equiv="content-type" content="text/html;charset='. $HTML_CHARSET .'">',"\n",'<meta charset="'. $HTML_CHARSET .'">',"\n",
' <title>Formulaire d\'envoi de message GPG</title>',"\n",
' </head>', "\n",
' <body>', "\n",
' <p>'. $text_strings[7] . '<b>' . $non_gpguser .'</b> :</p>', "\n",
' <form method="POST">', "\n",
' <textarea wrap="off" cols="50" rows="30" name="msg"></textarea><br>',
'};', "\n",
'if (defined $error_processing_msg){printf $error_processing_msg;}', "\n",
'printf qq{ <br>
<input type="submit" value="'. $text_strings[8] .'">', "\n",
' </form>', "\n",
' </body>', "\n",
'</html> };';
close $gpg_form_fh;
chmod(0755,$MAILFORM_RELPATH);
$notif_de_creation='<span style="color:green">'. $text_strings[9] . $non_gpguser .'</span><br><a href="'. $MAILFORM_LINK .'">'. $MAILFORM_LINK .'</a>';
}
else{
close $gpg_form_fh and die "Can't open $MAILFORM_RELPATH: $!";
}
}
else{
$notif_mail_valide = "<span style='color:red'>$text_strings[1] $non_gpguser $text_strings[3].</span>";
}
}
opendir my $link_dir_handle, './l' or die "Can't open ./l: $!";
while (readdir $link_dir_handle) {
if ($_ ne '.' and $_ ne '..'){
my $gpg_form_fn = $_;
my $non_gpguser = undef;
if (open my $gpg_form_handle , '<', "./l/$gpg_form_fn"){
for (1..3){
$non_gpguser = readline $gpg_form_handle;
$non_gpguser =~ s/q\{(.*?)\}//i;
$non_gpguser = $1;
}
close $gpg_form_handle;
if (not defined $non_gpguser){
$non_gpguser = $text_strings[4];
}
#create links table html
push @created_links,
'<tr>
<td><a href="/cgi-bin/l/'. $gpg_form_fn .'">ici</a></td>
<td><a href="mailto:'. $non_gpguser .'?subject='. $text_strings[10] .'&body='. $text_strings[11] .'http://$SRV_NAME/cgi-bin/l/'. $gpg_form_fn .'">'.$non_gpguser.'</a></td>
<td>
<form method="POST">
<input type="hidden" name="supprlien" value="'. $gpg_form_fn .'">
<input type="hidden" name="password" value="'. $cgi_query_get->param('password') .'">
<input type="submit" value="'. $text_strings[12] .'">
</form>
</td>
</tr>';
}
else {
close $gpg_form_handle;
die 'Content-type: text/plain', "\n\n", "$text_strings[13] $gpg_form_fn: $!";
}
}
}
closedir $link_dir_handle;
print $HTML_CONTENT_TYPE_HEADER,"\n\n",
'<!DOCTYPE html>
<html>
<head>
<link rel="icon" sizes="48x48" type="image/ico" href="/favicon.ico">
<link rel="stylesheet" type="text/css" href="'. $HTML_CSS .'">
<meta http-equiv="content-type" content="text/html;charset='. $HTML_CHARSET .'">',"\n",'<meta charset="'. $HTML_CHARSET .'">
<title>'. $text_strings[14] .'</title>
</head>
<body>
<p>'. $text_strings[15] .'</p>
<form method="POST">
<input type="hidden" name="password" value="0">
<input type="submit" value="'. $text_strings[16] .'">
</form>
<form method="POST">',
$psswd_formfield,
'<input type="submit" value="'. $text_strings[17] .'">
</form>
<hr>
<br>
<form method="POST">',
$psswd_formfield,
'Mail de la personne:<br>
<input tabindex="1" type="text" name="mail">
<input tabindex="2" type="submit" value="'. $text_strings[18] .'">
</form>';
print notif_if_defined($notif_mail_valide);
print '<br>';
print notif_if_defined($notif_de_creation);
print '<hr>
<p>'. $text_strings[19] .'</p>',
'<form method="POST">',
$psswd_formfield,
'<input type="hidden" name="supprtout">
<input type="submit" value="'. $text_strings[20] .'">
</form>',
notif_if_defined($notif_suppression),
'<table>
<tr>
<th>'. $text_strings[21] .'</th>',
'<th>'. $text_strings[22] .'</th>',
'<th>'. $text_strings[23] .'</th>',
'</tr>',
"@created_links",
'</table>
</body>
</html>';
}
else {
print 'Location: /index.html', "\n\n";
}
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