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|
#! /usr/bin/perl -wT
use warnings;
use strict;
use Crypt::Argon2 qw(argon2id_verify);
use Email::Valid;
use String::Random;
use CGI qw(param);
use CGI::Carp qw(fatalsToBrowser);
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;
}
else{
return '<!-- undef -->';
}
}
delete @ENV{qw(IFS PATH CDPATH BASH_ENV)};
$ENV{'PATH'} = '/usr/bin';
my $HOSTNAME = $ENV{'SERVER_NAME'};
my $LINK_TEMPLATE_PATH='/usr/share/webapps/gpigeon/link-template.pl'; # this is the file where the SMTP and mail address values goes
my $msg_form_char_limit = 3000;
my $PASSWD_HASH = q{password_hash_goes_here}; #argon2id hash format
my %text_strings = (link_del_ok => 'Successful removal !',
addr => 'Address',
here => 'here',
addr_ok => 'is valid!',
addr_nok => 'is not valid !',
addr_unknown => 'Unknown',
link_web_title => 'One time GPG messaging form',
link_legend_textarea =>'Type your message below :',
link_send_btn => 'Send',
link_generated_ok => 'Generated a link for',
mailto_body => 'Your link is ',
mailto_subject => 'Link to your one time GPG messaging form',
delete_link_btn_text => 'Delete',
delete_links_btn_text => 'Delete all links',
create_link_btn => 'Generate link',
web_title => 'GPIGEON.CGI: generate one time GPG messaging links !',
web_greet_msg => 'Hi and welcome.',
disconnect_btn_text => 'Disconnect',
refresh_btn_text => 'Refresh',
theader_link => 'Link',
theader_for => 'For',
theader_deletion => 'Deletion',
link_del_failed => 'Deletion failed and here is why : ',
msg_too_long => 'Cannot send message : message length must be under ' .$msg_form_char_limit . ' characters.',
msg_empty => 'Cannot send message : message is empty. You can type up to ' . $msg_form_char_limit . ' characters.',
notif_login_failure => 'Cannot login. Check if your username and password match.'
);
my $cgi_query_get = CGI->new;
my $PASSWD = $cgi_query_get->param('password');
my ($linkgen_notif, $mailisok_notif, $deletion_notif) = undef;
my @created_links = ();
if (argon2id_verify($PASSWD_HASH,$PASSWD)){
my $hidden_pwfield = '<input type="hidden" name="password" value="' . $PASSWD . '">';
if (defined $cgi_query_get->param('supprlien')){
my $pending_deletion = $cgi_query_get->param('supprlien');
my $linkfile_fn = "./l/$pending_deletion";
if (unlink untaint_cgi_filename($linkfile_fn)){
$deletion_notif=qq{<span style="color:green">$text_strings{link_del_ok}</span>};
}
else {
$deletion_notif=qq{<span style="color:red">$text_strings{link_del_failed} $linkfile_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 $linkfile_fn = "./l/$_";
unlink untaint_cgi_filename($linkfile_fn) or die "$!";
$deletion_notif=qq{<span style="color:green">$text_strings{link_del_ok}</span>};
}
}
closedir $link_dir_handle;
}
if (defined $cgi_query_get->param('mail')){
my $link_asker = scalar $cgi_query_get->param('mail');
if ( Email::Valid->address($link_asker) ){
$mailisok_notif = qq{<span style="color:green">$text_strings{addr} $link_asker $text_strings{addr_ok}</span>};
my $escaped_link_asker = escape_arobase($link_asker);
my $str_rand_obj = String::Random->new;
my $random_fn = $str_rand_obj->randregex('\w{64}');
my $GENERATED_FORM_FILENAME = "$random_fn.cgi";
my $HREF_LINK = "https://$HOSTNAME/cgi-bin/l/$GENERATED_FORM_FILENAME";
my $LINK_FILENAME = "./l/$GENERATED_FORM_FILENAME";
open my $in, '<', $LINK_TEMPLATE_PATH or die "Can't read link template file: $!";
open my $out, '>', $LINK_FILENAME or die "Can't write to link file: $!";
while( <$in> ) {
s/{link_user}/{$link_asker}/g;
s/{link_filename}/{$LINK_FILENAME}/g;
s/{msg_too_long}/$text_strings{msg_too_long}/g;
s/{msg_empty}/$text_strings{msg_empty}/g;
s/{msg_form_char_limit}/$msg_form_char_limit/g;
s/{link_send_btn}/$text_strings{link_send_btn}/g;
print $out $_;
}
close $in or die;
chmod(0755,$LINK_FILENAME) or die;
close $out or die;
$linkgen_notif = qq{<span style="color:green">$text_strings{link_generated_ok} $link_asker: </span><br><a href="$HREF_LINK">$HREF_LINK</a>};
}
else{
$mailisok_notif = qq{<span style="color:red">$text_strings{addr} $link_asker $text_strings{addr_nok}.</span>};
}
}
opendir my $link_dir_handle, './l' or die "Can't open ./l: $!";
while (readdir $link_dir_handle) {
if ($_ ne '.' and $_ ne '..'){
my $linkfile_fn = $_;
my $link_asker = undef;
if (open my $linkfile_handle , '<', "./l/$linkfile_fn"){
for (1..2){
$link_asker = readline $linkfile_handle;
$link_asker =~ s/q\{(.*?)\}//i;
$link_asker = $1;
}
close $linkfile_handle;
if (not defined $link_asker){
$link_asker = $text_strings{unknown};
}
#create links table html
push @created_links,
qq{<tr>
<td><a href="/cgi-bin/l/$linkfile_fn">ici</a></td>
<td><a href="mailto:$link_asker?subject=$text_strings{mailto_subject}&body=$text_strings{mailto_body} http://$HOSTNAME/cgi-bin/l/$linkfile_fn">$link_asker</a></td>
<td>
<form method="POST">
<input type="hidden" name="supprlien" value="$linkfile_fn">
<input type="hidden" name="password" value="$PASSWD">
<input type="submit" value="$text_strings{delete_link_btn_text}">
</form>
</td>
</tr>};
}
else {
close $linkfile_handle;
die 'Content-type: text/plain', "\n\n", "Error: Can't open $linkfile_fn: $!";
}
}
}
closedir $link_dir_handle;
print 'Content-type: text/html',"\n\n",
qq{<!DOCTYPE html>
<html>
<head>
<link rel="icon" sizes="48x48" type="image/ico" href="/favicon.ico">
<link rel="stylesheet" type="text/css" href="/styles.css">
<meta http-equiv="content-type" content="text/html;charset=UTF-8">
<meta charset="UTF-8">
<title>$text_strings{web_title}</title>
</head>
<body>
<p>$text_strings{web_greet_msg}</p>
<form method="POST">
<input type="hidden" name="password" value="0">
<input type="submit" value="$text_strings{disconnect_btn_text}">
</form>
<form method="POST">
$hidden_pwfield
<input type="submit" value="$text_strings{refresh_btn_text}">
</form>
<hr>
<br>
<form method="POST">
$hidden_pwfield
Mail de la personne:<br>
<input tabindex="1" type="text" name="mail">
<input tabindex="2" type="submit" value="$text_strings{create_link_btn}">
</form>},
notif_if_defined($mailisok_notif),
'<br>'
notif_if_defined($linkgen_notif),
qq{<hr>
<form method="POST">
$hidden_pwfield
<input type="hidden" name="supprtout">
<input type="submit" value="$text_strings{delete_links_btn_text}">
</form>},
notif_if_defined($deletion_notif),
qq{<table>
<tr>
<th>$text_strings{theader_link}</th>
<th>$text_strings{theader_for}</th>
<th>$text_strings{theader_deletion}</th>
</tr>
@created_links
</table>
</body>
</html>};
}
else {
print 'Location: /index.html', "\n\n";
}
|
