Matt's FormMail.pl Code Part 1:
#!/usr/bin/perl
##############################################################################
# FormMail Version 1.92 #
# Copyright 1995-2002 Matt Wright mattw@scriptarchive.com #
# Created 06/09/95 Last Modified 04/21/02 #
# Matt's Script Archive, Inc.: http://www.scriptarchive.com/ #
##############################################################################
# COPYRIGHT NOTICE #
# Copyright 1995-2002 Matthew M. Wright All Rights Reserved. #
# #
# FormMail may be used and modified free of charge by anyone so long as this #
# copyright notice and the comments above remain intact. By using this #
# code you agree to indemnify Matthew M. Wright from any liability that #
# might arise from its use. #
# #
# Selling the code for this program without prior written consent is #
# expressly forbidden. In other words, please ask first before you try and #
# make money off of my program. #
# #
# Obtain permission before redistributing this software over the Internet or #
# in any other medium. In all cases copyright and header must remain intact. #
##############################################################################
# ACCESS CONTROL FIX: Peter D. Thompson Yezek #
# http://www.securityfocus.com/archive/1/62033 #
##############################################################################
# Define Variables #
# Detailed Information Found In README File. #
# $mailprog defines the location of your sendmail program on your unix #
# system. The flags -i and -t should be passed to sendmail in order to #
# have it ignore single dots on a line and to read message for recipients #
$mailprog = '/usr/sbin/sendmail -i -t';
# @referers allows forms to be located only on servers which are defined #
# in this field. This security fix from the last version which allowed #
# anyone on any server to use your FormMail script on their web site. #
@referers = ('singaporean-directory.com','203.116.66.44');
# @recipients defines the e-mail addresses or domain names that e-mail can #
# be sent to. This must be filled in correctly to prevent SPAM and allow #
# valid addresses to receive e-mail. Read the documentation to find out how #
# this variable works!!! It is EXTREMELY IMPORTANT. #
@recipients = &fill_recipients(@referers);
# ACCESS CONTROL FIX: Peter D. Thompson Yezek #
# @valid_ENV allows the sysadmin to define what environment variables can #
# be reported via the env_report directive. This was implemented to fix #
# the problem reported at http://www.securityfocus.com/bid/1187 #
@valid_ENV = ('REMOTE_HOST','REMOTE_ADDR','REMOTE_USER','HTTP_USER_AGENT');
# Done #
##############################################################################
use LWP::UserAgent;
# Check Referring URL
&check_url;
# Retrieve Date
&get_date;
# Parse Form Contents
&parse_form;
# Check Required Fields
&check_required;
# Check the captcha challenge and response.
&check_captcha;
# Send E-Mail
&send_mail;
# Return HTML Page or Redirect User
&return_html;
##############################################################################
# Check the CAPTCHA response via the reCAPTCHA service.
sub check_captcha {
my $ua = LWP::UserAgent->new();
my $result=$ua->post(
'http://api-verify.recaptcha.net/verify',
{
privatekey => 'your_private_key',
remoteip => $ENV{'REMOTE_ADDR'},
challenge => $Form{'recaptcha_challenge_field'},
response => $Form{'recaptcha_response_field'}
});
if ( $result->is_success && $result->content =~ /^true/) {
return;
} else {
&error('captcha_failed');
}
}
# NOTE rev1.91: This function is no longer intended to stop abuse, that #
# functionality is now embedded in the checks made on @recipients and the #
# recipient form field. #
sub check_url {
# Localize the check_referer flag which determines if user is valid. #
local($check_referer) = 0;
# If a referring URL was specified, for each valid referer, make sure #
# that a valid referring URL was passed to FormMail. #
if ($ENV{'HTTP_REFERER'}) {
foreach $referer (@referers) {
if ($ENV{'HTTP_REFERER'} =~ m|https?://([^/]*)$referer|i) {
$check_referer = 1;
last;
}
}
}
else {
$check_referer = 1;
}
# If the HTTP_REFERER was invalid, send back an error. #
if ($check_referer != 1) { &error('bad_referer') }
}
sub get_date {
# Define arrays for the day of the week and month of the year. #
@days = ('Sunday','Monday','Tuesday','Wednesday',
'Thursday','Friday','Saturday');
@months = ('January','February','March','April','May','June','July',
'August','September','October','November','December');
# Get the current time and format the hour, minutes and seconds. Add #
# 1900 to the year to get the full 4 digit year. #
($sec,$min,$hour,$mday,$mon,$year,$wday) = (localtime(time))[0,1,2,3,4,5,6];
$time = sprintf("%02d:%02d:%02d",$hour,$min,$sec);
$year += 1900;
# Format the date. #
$date = "$days[$wday], $months[$mon] $mday, $year at $time";
}
sub parse_form {
# Define the configuration associative array. #
%Config = ('recipient','', 'subject','',
'EMAIL','', 'NAME','',
'TITLE','', 'URL','',
'DESCRIPTION','', 'CATEGORY','',
'RECIPROCAL','', 'missing_fields_redirect','',
'redirect','', 'bgcolor','',
'background','', 'link_color','',
'vlink_color','', 'text_color','',
'alink_color','', 'title','',
'sort','', 'print_config','',
'required','', 'env_report','',
'return_link_title','', 'return_link_url','',
'print_blank_fields','');
# Determine the form's REQUEST_METHOD (GET or POST) and split the form #
# fields up into their name-value pairs. If the REQUEST_METHOD was #
# not GET or POST, send an error. #
if ($ENV{'REQUEST_METHOD'} eq 'GET') {
# Split the name-value pairs
@pairs = split(/&/, $ENV{'QUERY_STRING'});
}
elsif ($ENV{'REQUEST_METHOD'} eq 'POST') {
# Get the input
read(STDIN, $buffer, $ENV{'CONTENT_LENGTH'});
# Split the name-value pairs
@pairs = split(/&/, $buffer);
}
else {
&error('request_method');
}
# For each name-value pair: #
foreach $pair (@pairs) {
# Split the pair up into individual variables. #
local($name, $value) = split(/=/, $pair);
# Decode the form encoding on the name and value variables. #
# v1.92: remove null bytes #
$name =~ tr/+/ /;
$name =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg;
$name =~ tr/\0//d;
$value =~ tr/+/ /;
$value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg;
$value =~ tr/\0//d;
# If the field name has been specified in the %Config array, it will #
# return a 1 for defined($Config{$name}}) and we should associate #
# this value with the appropriate configuration variable. If this #
# is not a configuration form field, put it into the associative #
# array %Form, appending the value with a ', ' if there is already a #
# value present. We also save the order of the form fields in the #
# @Field_Order array so we can use this order for the generic sort. #
if (defined($Config{$name})) {
$Config{$name} = $value;
}
else {
if ($Form{$name} ne '') {
$Form{$name} = "$Form{$name}, $value";
}
else {
push(@Field_Order,$name);
$Form{$name} = $value;
}
}
}