phpBB und Anti Bot

################################################################################
##
## Mod Title: Advanced Visual Confirmation
## Mod Author: AmigaLink < webmaster@amigalink.de > (Markus Schmidt) http://www.EssenMitFreude.info
##
## Mod Description: This MOD replaces the original CAPTCHA of the phpBB Visual Confirmation.
## 
## Mod Version: 1.2.0b
##
##
## Compatibility: phpBB >= 2.0.11
## (This installation guide is for phpBB 2.0.21)
## (If you uses an older phpBB you should urgently update!!!)
##
## Installation Level: Easy 
## Installation Time: 4 Minutes 
##
## Files To Edit: 5
## profile.php
## includes/constants.php
## includes/functions.php
## includes/usercp_register.php
## templates/subSilver/profile_add_body.tpl
##
## Included Files: 5
## admin/admin_captcha_config.php
## includes/usercp_confirm.php
## language/lang_english/lang_admin_captcha.php
## language/lang_german/lang_admin_captcha.php
## templates/subSilver/admin/admin_captcha_config.tpl
##
################################################################################
##
## The following sites also contain the latest version of this MOD: 
## 
## http://www.AmigaLink.de
## http://www.phpBB.de
## http://www.phpBBhacks.com
## 
## Full support for this MOD can be obtained at: 
##
## http://www.AmigaLink.de
##
################################################################################
##
## 2007-01-07 - Version 1.2.0b
## - little change at db_update.php
##
## 2006-12-27 - Version 1.2.0a
## - add russian language file (THX to Edgar for translation)
## - add better english language file (THX to Teelk for polish)
## - little changes for phpbb.de MOD valitation
##
## 2006-11-12 - Version 1.2.0
## - configurable example code for ACP added
## - background image functions added
## - better way to calculate letter size, position and color
## - chess is now a real chess, with random position and rectangle size
## - some code changes
## - second preview and AVC version info added to ACP
## - add db_update.php
##
## 2006-06-21 - Version 1.1.1
## - add coincidence-generated variable code lengthens 
##
## 2006-03-30 - Version 1.1.0
## - some colors changed for better recognition
## - random font per letter added (idea by cYbercOsmOnauT)
## - a security change
## - some codechanges for higher CAPTCHA security
## ^ some colors changed
## ^ shuffle the defined colors before take one (by cYbercOsmOnauT)
## ^ better way to calculate letter size and position (partly based on an idea of cYbercOsmOnauT)
## - add possibility to generate JPEG with adjustable quality 
## - chess, ellipses, arcs and lines now can defined as random
## - better way to position the shadow letters
## - adjustable lattice color
## - own lang files added
## - now compatibly with servers which need a absolut path to load TTFonts
##
## 2006-03-16 - Version 1.0.1
## - missing files added
##
## 2006-03-15 - Version 1.0.0
## - first release
##
################################################################################
##
## This hack is released under the GPL License. 
## This hack can be freely used, but not distributed, without permission.
## Intellectual Property Rights are retained by the hack author(s) 
## listed above.
##
################################################################################
##
## BEFORE ADDING THIS HACK TO YOUR FORUM, please be sure to backup ALL
## affected files.
##
################################################################################
#
#-----[ PLEASE NOTE ]------------------------------------------
#
# At least GD library 1.6 with freetype are needed!
# For JPEG are GD 1.8 needed.
# Deactivate the Ellipses if you have PHP lower than 4.0.6.
#
#
#-----[ COPY FILES ]------------------------------------------
#
# Copy / upload the following files to your phpBB root directory.
# The phpBB root directory is the directory on your server containing index.php
#

admin/admin_captcha_config.php to admin/admin_captcha_config.php
includes/usercp_confirm.php to includes/usercp_confirm.php
language/lang_english/lang_admin_captcha.php to language/lang_english/lang_admin_captcha.php
language/lang_german/lang_admin_captcha.php to language/lang_german/lang_admin_captcha.php
templates/subSilver/admin/admin_captcha_config.tpl to templates/subSilver/admin/admin_captcha_config.tpl
captcha/fonts/* to captcha/fonts/*

#
#----------[ SQL ]--------------------------------------
#
# Run the following SQL statement to update your phpBB database.
# You can use phpMyAdmin or a similar tool to run this update.
#
# IMPORTANT: If you have changed the table prefix from the default of phpBB2,
# please be sure to replace phpbb with your prefix BEFORE running this update.
#

CREATE TABLE `phpbb_captcha_config` (
 `config_name` varchar(255) NOT NULL default '',
 `config_value` varchar(100) NOT NULL default '',
 PRIMARY KEY (`config_name`)
) TYPE=MyISAM;

INSERT INTO `phpbb_captcha_config` VALUES ('width', '350');
INSERT INTO `phpbb_captcha_config` VALUES ('height', '90');
INSERT INTO `phpbb_captcha_config` VALUES ('exsample_code', 'SAMPLE');
INSERT INTO `phpbb_captcha_config` VALUES ('background_color', '#E5ECF9');
INSERT INTO `phpbb_captcha_config` VALUES ('jpeg', '0');
INSERT INTO `phpbb_captcha_config` VALUES ('jpeg_quality', '50');
INSERT INTO `phpbb_captcha_config` VALUES ('pre_letters', '0');
INSERT INTO `phpbb_captcha_config` VALUES ('pre_letters_great', '0');
INSERT INTO `phpbb_captcha_config` VALUES ('font', '0');
INSERT INTO `phpbb_captcha_config` VALUES ('trans_letters', '0');
INSERT INTO `phpbb_captcha_config` VALUES ('chess', '0');
INSERT INTO `phpbb_captcha_config` VALUES ('ellipses', '1');
INSERT INTO `phpbb_captcha_config` VALUES ('arcs', '0');
INSERT INTO `phpbb_captcha_config` VALUES ('lines', '1');
INSERT INTO `phpbb_captcha_config` VALUES ('image', '0');
INSERT INTO `phpbb_captcha_config` VALUES ('bg_transition', '25');
INSERT INTO `phpbb_captcha_config` VALUES ('gammacorrect', '0.8');
INSERT INTO `phpbb_captcha_config` VALUES ('foreground_lattice_x', '15');
INSERT INTO `phpbb_captcha_config` VALUES ('foreground_lattice_y', '15');
INSERT INTO `phpbb_captcha_config` VALUES ('lattice_color', '#FFFFFF');
INSERT INTO `phpbb_captcha_config` VALUES ('avc_version', '1.2.0b');

ALTER TABLE `phpbb_confirm` CHANGE `code` `code` CHAR(10) NOT NULL;

#
#----------[ OPEN ]-------------------------------------
#

profile.php

#
#----------[ FIND ]-------------------------------------
#

 else if ( $mode == 'confirm' )
 {
 // Visual Confirmation
 if ( $userdata['session_logged_in'] )

#
#----------[ REPLACE WITH ]-----------------------------
#

 else if ( $mode == 'confirm' )
 {
 // Visual Confirmation
 if ( $userdata['session_logged_in'] && (htmlspecialchars($HTTP_GET_VARS['id']) != 'Admin'))

#
#----------[ OPEN ]-------------------------------------
#

includes/constants.php

#
#----------[ FIND ]-------------------------------------
#

define('CONFIG_TABLE', $table_prefix.'config');

#
#----------[ AFTER, ADD ]-------------------------------
#

define('CAPTCHA_CONFIG_TABLE', $table_prefix.'captcha_config');

#
#----------[ OPEN ]-------------------------------------
#

includes/functions.php

#
#----------[ FIND ]-------------------------------------
#

 include($phpbb_root_path . 'language/lang_' . $board_config['default_lang'] . '/lang_admin.' . $phpEx);

#
#----------[ AFTER, ADD ]-------------------------------
#

 include($phpbb_root_path . 'language/lang_' . $board_config['default_lang'] . '/lang_admin_captcha.' . $phpEx);

#
#----------[ OPEN ]-------------------------------------
#

includes/usercp_register.php

#
#----------[ FIND ]-------------------------------------
#

 // Generate the required confirmation code
 // NB 0 (zero) could get confused with O (the letter) so we make change it
 $code = dss_rand();
 $code = substr(str_replace('0', 'Z', strtoupper(base_convert($code, 16, 35))), 2, 6);

#
#----------[ REPLACE WITH ]-----------------------------
#

 // Generate the required confirmation code
 $code_length = mt_rand(4, 6);
 $code = dss_rand();
 $code = strtoupper(base_convert($code, 16, 35));
 $code = str_replace('I', '', $code); // The letter I could get confused with the letter J and the number 1 (one) so we remove it
 $code = str_replace('0', '', $code); // NB 0 (zero) could get confused with O (the letter) so we remove it
 $code = substr($code, 2, $code_length);

#
#----------[ OPEN ]-------------------------------------
#

templates/subSilver/profile_add_body.tpl

#
#----------[ FIND ]-------------------------------------
#

 <td class="row2"><input type="text" class="post" style="width: 200px" name="confirm_code" size="6" maxlength="6" value="" /></td>

#
#----------[ REPLACE WITH ]-----------------------------
#

 <td class="row2"><input type="text" class="post" style="width: 200px" name="confirm_code" size="10" maxlength="10" value="" /></td>

#
#-----[ SAVE/CLOSE ALL FILES ]--------------------------
#
# EoM