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Add TINYIB_CAPTCHA

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Trevor Slocum 2014-11-06 03:34:19 -08:00
parent e7c69c9a95
commit e2d433ff16
11 changed files with 647 additions and 7 deletions
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1
imgboard.php
View file

@ -70,6 +70,7 @@ if (isset($_POST['message']) || isset($_POST['file'])) {
list($loggedin, $isadmin) = manageCheckLogIn();
$rawpost = isRawPost();
if (!$loggedin) {
checkCAPTCHA();
checkBanned();
checkMessageSize();
checkFlood();

386
inc/captcha.php Normal file
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@ -0,0 +1,386 @@
<?php
/**
* Script for generation of CAPTCHAs
*
* @author Jose Rodriguez <jose.rodriguez@exec.cl>
* @license GPLv3
* @link http://code.google.com/p/cool-php-captcha
* @version 0.3
*
*/
session_start();
putenv('GDFONTPATH=' . realpath('./fonts/'));
$captcha = new SimpleCaptcha();
$captcha->CreateImage();
/**
* SimpleCaptcha class
*
*/
class SimpleCaptcha {
/** Width of the image */
public $width = 175;
/** Height of the image */
public $height = 55;
/** Dictionary word file (empty for random text) */
public $wordsFile = '';
/**
* Path for resource files (fonts, words, etc.)
*
* "resources" by default. For security reasons, is better move this
* directory to another location outise the web server
*
*/
public $resourcesPath = './fonts';
/** Min word length (for non-dictionary random text generation) */
public $minWordLength = 4;
/**
* Max word length (for non-dictionary random text generation)
*
* Used for dictionary words indicating the word-length
* for font-size modification purposes
*/
public $maxWordLength = 6;
/** Sessionname to store the original text */
public $session_var = 'tinyibcaptcha';
/** Background color in RGB-array */
public $backgroundColor = array(254, 254, 254);
/** Foreground colors in RGB-array */
public $colors = array(
array(27, 78, 181), // blue
array(22, 163, 35), // green
array(214, 36, 7), // red
);
/** Shadow color in RGB-array or null */
public $shadowColor = array(0, 0, 0);
/** Horizontal line through the text */
public $lineWidth = 3;
/**
* Font configuration
*
* - font: TTF file
* - spacing: relative pixel space between character
* - minSize: min font size
* - maxSize: max font size
*/
public $fonts = array(
'Roboto-Regular' => array('spacing' => 0, 'minSize' => 27, 'maxSize' => 27, 'font' => 'roboto_regular.ttf'),
'Roboto-Bold' => array('spacing' => 0, 'minSize' => 27, 'maxSize' => 27, 'font' => 'roboto_bold.ttf')
);
/** Wave configuracion in X and Y axes */
public $Yperiod = 12;
public $Yamplitude = 14;
public $Xperiod = 11;
public $Xamplitude = 5;
/** letter rotation clockwise */
public $maxRotation = 8;
/**
* Internal image size factor (for better image quality)
* 1: low, 2: medium, 3: high
*/
public $scale = 3;
/**
* Blur effect for better image quality (but slower image processing).
* Better image results with scale=3
*/
public $blur = true;
/** Debug? */
public $debug = false;
/** Image format: jpeg or png */
public $imageFormat = 'png';
/** GD image */
public $im;
public function __construct($config = array()) {
}
public function CreateImage() {
$ini = microtime(true);
/** Initialization */
$this->ImageAllocate();
/** Text insertion */
$text = $this->GetCaptchaText();
$fontcfg = $this->fonts[array_rand($this->fonts)];
$this->WriteText($text, $fontcfg);
$_SESSION[$this->session_var] = $text;
/** Transformations */
if (!empty($this->lineWidth)) {
$this->WriteLine();
}
$this->WaveImage();
if ($this->blur && function_exists('imagefilter')) {
imagefilter($this->im, IMG_FILTER_GAUSSIAN_BLUR);
}
$this->ReduceImage();
if ($this->debug) {
imagestring($this->im, 1, 1, $this->height - 8,
"$text {$fontcfg['font']} " . round((microtime(true) - $ini) * 1000) . "ms",
$this->GdFgColor
);
}
/** Output */
$this->WriteImage();
$this->Cleanup();
}
/**
* Creates the image resources
*/
protected function ImageAllocate() {
// Cleanup
if (!empty($this->im)) {
imagedestroy($this->im);
}
$this->im = imagecreatetruecolor($this->width * $this->scale, $this->height * $this->scale);
// Background color
$this->GdBgColor = imagecolorallocate($this->im,
$this->backgroundColor[0],
$this->backgroundColor[1],
$this->backgroundColor[2]
);
imagefilledrectangle($this->im, 0, 0, $this->width * $this->scale, $this->height * $this->scale, $this->GdBgColor);
// Foreground color
$color = $this->colors[mt_rand(0, sizeof($this->colors) - 1)];
$this->GdFgColor = imagecolorallocate($this->im, $color[0], $color[1], $color[2]);
// Shadow color
if (!empty($this->shadowColor) && is_array($this->shadowColor) && sizeof($this->shadowColor) >= 3) {
$this->GdShadowColor = imagecolorallocate($this->im,
$this->shadowColor[0],
$this->shadowColor[1],
$this->shadowColor[2]
);
}
}
/**
* Text generation
*
* @return string Text
*/
protected function GetCaptchaText() {
$text = $this->GetDictionaryCaptchaText();
if (!$text) {
$text = $this->GetRandomCaptchaText();
}
return $text;
}
/**
* Random text generation
*
* @return string Text
*/
protected function GetRandomCaptchaText($length = null) {
if (empty($length)) {
$length = rand($this->minWordLength, $this->maxWordLength);
}
$words = "abcdefghijlmnopqrstvwyz";
$vocals = "aeiou";
$text = "";
$vocal = rand(0, 1);
for ($i = 0; $i < $length; $i++) {
if ($vocal) {
$text .= substr($vocals, mt_rand(0, 4), 1);
} else {
$text .= substr($words, mt_rand(0, 22), 1);
}
$vocal = !$vocal;
}
return $text;
}
/**
* Random dictionary word generation
*
* @param boolean $extended Add extended "fake" words
* @return string Word
*/
function GetDictionaryCaptchaText($extended = false) {
if (empty($this->wordsFile)) {
return false;
}
// Full path of words file
if (substr($this->wordsFile, 0, 1) == '/') {
$wordsfile = $this->wordsFile;
} else {
$wordsfile = $this->resourcesPath . '/' . $this->wordsFile;
}
if (!file_exists($wordsfile)) {
return false;
}
$fp = fopen($wordsfile, "r");
$length = strlen(fgets($fp));
if (!$length) {
return false;
}
$line = rand(1, (filesize($wordsfile) / $length) - 2);
if (fseek($fp, $length * $line) == -1) {
return false;
}
$text = trim(fgets($fp));
fclose($fp);
/** Change ramdom volcals */
if ($extended) {
$text = preg_split('//', $text, -1, PREG_SPLIT_NO_EMPTY);
$vocals = array('a', 'e', 'i', 'o', 'u');
foreach ($text as $i => $char) {
if (mt_rand(0, 1) && in_array($char, $vocals)) {
$text[$i] = $vocals[mt_rand(0, 4)];
}
}
$text = implode('', $text);
}
return $text;
}
/**
* Horizontal line insertion
*/
protected function WriteLine() {
$x1 = $this->width * $this->scale * .15;
$x2 = $this->textFinalX;
$y1 = rand($this->height * $this->scale * .40, $this->height * $this->scale * .65);
$y2 = rand($this->height * $this->scale * .40, $this->height * $this->scale * .65);
$width = $this->lineWidth / 2 * $this->scale;
for ($i = $width * -1; $i <= $width; $i++) {
imageline($this->im, $x1, $y1 + $i, $x2, $y2 + $i, $this->GdFgColor);
}
}
/**
* Text insertion
*/
protected function WriteText($text, $fontcfg = array()) {
if (empty($fontcfg)) {
// Select the font configuration
$fontcfg = $this->fonts[array_rand($this->fonts)];
}
$fontfile = $fontcfg['font'];
/** Increase font-size for shortest words: 9% for each glyph missing */
$lettersMissing = $this->maxWordLength - strlen($text);
$fontSizefactor = 1 + ($lettersMissing * 0.09);
// Text generation (char by char)
$x = 20 * $this->scale;
$y = round(($this->height * 27 / 40) * $this->scale);
$length = strlen($text);
for ($i = 0; $i < $length; $i++) {
$degree = rand($this->maxRotation * -1, $this->maxRotation);
$fontsize = rand($fontcfg['minSize'], $fontcfg['maxSize']) * $this->scale * $fontSizefactor;
$letter = substr($text, $i, 1);
if ($this->shadowColor) {
$coords = imagettftext($this->im, $fontsize, $degree,
$x + $this->scale, $y + $this->scale,
$this->GdShadowColor, $fontfile, $letter);
}
$coords = imagettftext($this->im, $fontsize, $degree,
$x, $y,
$this->GdFgColor, $fontfile, $letter);
$x += ($coords[2] - $x) + ($fontcfg['spacing'] * $this->scale);
}
$this->textFinalX = $x;
}
/**
* Wave filter
*/
protected function WaveImage() {
// X-axis wave generation
$xp = $this->scale * $this->Xperiod * rand(1, 3);
$k = rand(0, 100);
for ($i = 0; $i < ($this->width * $this->scale); $i++) {
imagecopy($this->im, $this->im,
$i - 1, sin($k + $i / $xp) * ($this->scale * $this->Xamplitude),
$i, 0, 1, $this->height * $this->scale);
}
// Y-axis wave generation
$k = rand(0, 100);
$yp = $this->scale * $this->Yperiod * rand(1, 2);
for ($i = 0; $i < ($this->height * $this->scale); $i++) {
imagecopy($this->im, $this->im,
sin($k + $i / $yp) * ($this->scale * $this->Yamplitude), $i - 1,
0, $i, $this->width * $this->scale, 1);
}
}
/**
* Reduce the image to the final size
*/
protected function ReduceImage() {
// Reduzco el tama<6D>o de la imagen
$imResampled = imagecreatetruecolor($this->width, $this->height);
imagecopyresampled($imResampled, $this->im,
0, 0, 0, 0,
$this->width, $this->height,
$this->width * $this->scale, $this->height * $this->scale
);
imagedestroy($this->im);
$this->im = $imResampled;
}
/**
* File generation
*/
protected function WriteImage() {
if ($this->imageFormat == 'png' && function_exists('imagepng')) {
imagealphablending($this->im, true);
imagesavealpha($this->im, false);
imagecolortransparent($this->im, $this->GdBgColor);
header("Content-type: image/png");
imagepng($this->im);
} else {
header("Content-type: image/jpeg");
imagejpeg($this->im, null, 80);
}
}
/**
* Cleanup
*/
protected function Cleanup() {
imagedestroy($this->im);
}
}

3
inc/defines.php
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@ -30,6 +30,9 @@ if (!defined('TINYIB_WEBM')) {
if (!defined('TINYIB_NOFILEOK')) {
define('TINYIB_NOFILEOK', false);
}
if (!defined('TINYIB_CAPTCHA')) {
define('TINYIB_CAPTCHA', false);
}
if (!defined('TINYIB_REQMOD')) {
define('TINYIB_REQMOD', 'disable');
}

4
inc/flatfile/flatfile_utils.php
View file

@ -71,9 +71,9 @@ class TableUtils {
/** Uses 'define' to create global constants for all the column names */
function createDefines(&$tables) {
foreach ($tables as $tablename => $discard) {
$tabledef = & $tables[$tablename]; // PHP4 compatible
$tabledef = &$tables[$tablename]; // PHP4 compatible
foreach ($tabledef as $colname => $discard) {
$coldef = & $tabledef[$colname];
$coldef = &$tabledef[$colname];
define(strtoupper($tablename) . '_' . $colname, $coldef->index);
}
}

203
inc/fonts/LICENSE Normal file
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@ -0,0 +1,203 @@
Font data copyright Google 2012
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
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inc/fonts/roboto_bold.ttf Normal file
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inc/fonts/roboto_regular.ttf Normal file
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19
inc/functions.php
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@ -187,8 +187,8 @@ function writePage($filename, $contents) {
}
function fixLinksInRes($html) {
$search = array(' href="css/', ' src="js/', ' href="src/', ' href="thumb/', ' href="res/', ' href="imgboard.php', ' href="favicon.ico', 'src="thumb/', ' action="imgboard.php');
$replace = array(' href="../css/', ' src="../js/', ' href="../src/', ' href="../thumb/', ' href="../res/', ' href="../imgboard.php', ' href="../favicon.ico', 'src="../thumb/', ' action="../imgboard.php');
$search = array(' href="css/', ' src="js/', ' href="src/', ' href="thumb/', ' href="res/', ' href="imgboard.php', ' href="favicon.ico', 'src="thumb/', 'src="inc/', ' action="imgboard.php');
$replace = array(' href="../css/', ' src="../js/', ' href="../src/', ' href="../thumb/', ' href="../res/', ' href="../imgboard.php', ' href="../favicon.ico', 'src="../thumb/', 'src="../inc/', ' action="../imgboard.php');
return str_replace($search, $replace, $html);
}
@ -221,6 +221,21 @@ function deletePostImages($post) {
}
}
function checkCAPTCHA() {
if (!TINYIB_CAPTCHA) {
return; // CAPTCHA is disabled
}
$captcha = isset($_POST['captcha']) ? strtolower(trim($_POST['captcha'])) : '';
$captcha_solution = isset($_SESSION['tinyibcaptcha']) ? strtolower(trim($_SESSION['tinyibcaptcha'])) : '';
if ($captcha == '') {
fancyDie('Please enter the CAPTCHA text.');
} else if ($captcha != $captcha_solution) {
fancyDie('Incorrect CAPTCHA text entered. Please try again.<br>Click the image to retrieve a new CAPTCHA.');
}
}
function checkBanned() {
$ban = banByIP($_SERVER['REMOTE_ADDR']);
if ($ban) {

22
inc/html.php
View file

@ -214,8 +214,19 @@ EOF;
$file_input_html = '';
$unique_posts_html = '';
if (TINYIB_REQMOD != 'disable') {
$reqmod_html = '<li>All posts' . (TINYIB_REQMOD == 'files' ? ' with a file attached' : '') . ' will be moderated before being shown.</li>';
$captcha_html = '';
if (TINYIB_CAPTCHA) {
$captcha_html = <<<EOF
<tr>
<td class="postblock">
CAPTCHA
</td>
<td>
<input type="text" name="captcha" id="captcha" autocomplete="off" size="6" accesskey="c">&nbsp;&nbsp;(enter the text below)<br>
<img id="captchaimage" src="inc/captcha.php" width="175" height="55" alt="CAPTCHA" onclick="javascript:reloadCAPTCHA()" style="margin-top: 5px;cursor: pointer;">
</td>
</tr>
EOF;
}
if (TINYIB_PIC || TINYIB_WEBM || TINYIB_SWF) {
@ -238,6 +249,10 @@ EOF;
EOF;
}
if (TINYIB_REQMOD != 'disable') {
$reqmod_html = '<li>All posts' . (TINYIB_REQMOD == 'files' ? ' with a file attached' : '') . ' will be moderated before being shown.</li>';
}
$thumbnails_html = '';
if (TINYIB_PIC) {
$thumbnails_html = "<li>Images greater than $maxdimensions will be thumbnailed.</li>";
@ -298,13 +313,14 @@ EOF;
<textarea id="message" name="message" cols="48" rows="4" accesskey="m"></textarea>
</td>
</tr>
$captcha_html
$file_input_html
<tr>
<td class="postblock">
Password
</td>
<td>
<input type="password" name="password" id="newpostpassword" size="8" accesskey="p">&nbsp;(for post and file deletion)
<input type="password" name="password" id="newpostpassword" size="8" accesskey="p">&nbsp;&nbsp;(for post and file deletion)
</td>
</tr>
<tr>

15
js/tinyib.js
View file

@ -23,6 +23,21 @@ function quotePost(postID) {
return false;
}
function reloadCAPTCHA() {
var captcha_element = document.getElementById("captcha");
if (captcha_element) {
captcha_element.focus();
captcha_element.value = "";
}
var captchaimg_element = document.getElementById("captchaimage");
if (captchaimg_element) {
captchaimg_element.src += "#new";
}
return false;
}
document.addEventListener('DOMContentLoaded', function () {
var newpostpassword = document.getElementById("newpostpassword");
if (newpostpassword) {

1
settings.default.php
View file

@ -14,6 +14,7 @@ define('TINYIB_MODPASS', ""); // Moderators only have access to delete (
// Board description and behavior
define('TINYIB_BOARD', "b"); // Unique identifier for this board using only letters and numbers
define('TINYIB_BOARDDESC', "TinyIB"); // Displayed at the top of every page
define('TINYIB_CAPTCHA', false); // Reduce spam by requiring users to pass a CAPTCHA when posting (click Rebuild All in the management panel after enabling)
define('TINYIB_REQMOD', "disable"); // Require moderation before displaying posts: disable / files / all (see README for instructions, only MySQL is supported)
// Board appearance