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[Openupload-svn-update] SF.net SVN: openupload:[17] trunk/plugins/securimage
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From: <ts...@us...> - 2008-10-15 14:13:06
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Revision: 17
http://openupload.svn.sourceforge.net/openupload/?rev=17&view=rev
Author: tsdogs
Date: 2008-10-15 14:12:06 +0000 (Wed, 15 Oct 2008)
Log Message:
-----------
First svn commit
Added Paths:
-----------
trunk/plugins/securimage/LICENSE.txt
trunk/plugins/securimage/README.txt
trunk/plugins/securimage/elephant.ttf
trunk/plugins/securimage/example_form.php
trunk/plugins/securimage/gdfonts/
trunk/plugins/securimage/gdfonts/automatic.gdf
trunk/plugins/securimage/gdfonts/bubblebath.gdf
trunk/plugins/securimage/gdfonts/caveman.gdf
trunk/plugins/securimage/gdfonts/crass.gdf
trunk/plugins/securimage/images/
trunk/plugins/securimage/images/audio_icon.gif
trunk/plugins/securimage/images/refresh.gif
trunk/plugins/securimage/securimage.php
trunk/plugins/securimage/securimage_example.php
trunk/plugins/securimage/securimage_play.php
trunk/plugins/securimage/securimage_show.php
Added: trunk/plugins/securimage/LICENSE.txt
===================================================================
--- trunk/plugins/securimage/LICENSE.txt (rev 0)
+++ trunk/plugins/securimage/LICENSE.txt 2008-10-15 14:12:06 UTC (rev 17)
@@ -0,0 +1,458 @@
+ GNU LESSER GENERAL PUBLIC LICENSE
+ Version 2.1, February 1999
+
+ Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+ 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ Everyone is permitted to copy and distribute verbatim copies
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+ NO WARRANTY
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+DAMAGES.
+
+ END OF TERMS AND CONDITIONS
Added: trunk/plugins/securimage/README.txt
===================================================================
--- trunk/plugins/securimage/README.txt (rev 0)
+++ trunk/plugins/securimage/README.txt 2008-10-15 14:12:06 UTC (rev 17)
@@ -0,0 +1,57 @@
+NAME:
+
+ Securimage - A PHP class for creating and managing form CAPTCHA images
+
+VERSION: 1.0.2
+
+AUTHOR:
+
+ Drew Phillips <dr...@dr...>
+
+DOWNLOAD:
+
+ The latest version can always be
+ found at http://www.phpcaptcha.org
+
+DOCUMENTATION:
+
+ Online documentation of the class, methods, and variables can
+ be found at http://www.phpcaptcha.org/Securimage_Docs/
+
+REQUIREMENTS:
+ PHP 4.3.0
+ GD 2.0
+ FreeType (optional, required for TTF support)
+
+SYNOPSIS:
+
+ require_once 'securimage.php';
+
+ $image = new Securimage();
+
+ $image->show();
+
+ // Code Validation
+
+ $image = new Securimage();
+ if ($image->check($_POST['code']) == true) {
+ echo "Correct!";
+ } else {
+ echo "Sorry, wrong code.";
+ }
+
+DESCRIPTION:
+
+ What is Securimage?
+
+ Securimage is a PHP class that is used to generate and validate CAPTCHA images.
+ The classes uses an existing PHP session or creates its own if none is found to store the
+ CAPTCHA code. Variables within the class are used to control the style and display of the image.
+ The class supports TTF fonts and effects for strengthening the security of the image.
+ If TTF support is not available, GD fonts can be used as well, but certain options such as
+ transparent text and angled letters cannot be used.
+
+
+COPYRIGHT:
+ Copyright (c) 2007 Drew Phillips. All rights reserved.
+ This software is released under the GNU Lesser General Public License.
Added: trunk/plugins/securimage/elephant.ttf
===================================================================
(Binary files differ)
Property changes on: trunk/plugins/securimage/elephant.ttf
___________________________________________________________________
Added: svn:mime-type
+ application/octet-stream
Added: trunk/plugins/securimage/example_form.php
===================================================================
--- trunk/plugins/securimage/example_form.php (rev 0)
+++ trunk/plugins/securimage/example_form.php 2008-10-15 14:12:06 UTC (rev 17)
@@ -0,0 +1,78 @@
+<?php
+
+/**
+ * Project: Securimage: A PHP class for creating and managing form CAPTCHA images<br />
+ * File: form.php<br /><br />
+ *
+ * This is a very simple form sending a username and password.<br />
+ * It demonstrates how you can integrate the image script into your code.<br />
+ * By creating a new instance of the class and passing the user entered code as the only parameter, you can then immediately call $obj->checkCode() which will return true if the code is correct, or false otherwise.<br />
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or any later version.<br /><br />
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.<br /><br />
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA<br /><br />
+ *
+ * Any modifications to the library should be indicated clearly in the source code
+ * to inform users that the changes are not a part of the original software.<br /><br />
+ *
+ * If you found this script useful, please take a quick moment to rate it.<br />
+ * http://www.hotscripts.com/rate/49400.html Thanks.
+ *
+ * @link http://www.phpcaptcha.org Securimage PHP CAPTCHA
+ * @link http://www.phpcaptcha.org/latest.zip Download Latest Version
+ * @link http://www.phpcaptcha.org/Securimage_Docs/ Online Documentation
+ * @copyright 2007 Drew Phillips
+ * @author drew010 <dr...@dr...>
+ * @version 1.0.3.1 (March 23, 2008)
+ * @package Securimage
+ *
+ */ ?>
+<html>
+<head>
+ <title>Securimage Test Form</title>
+</head>
+
+<body>
+
+<?php
+if (empty($_POST)) { ?>
+<form method="POST">
+Username:<br />
+<input type="text" name="username" /><br />
+Password:<br />
+<input type="text" name="password" /><br />
+
+<!-- pass a session id to the query string of the script to prevent ie caching -->
+<img src="securimage_show.php?sid=<?php echo md5(uniqid(time())); ?>"><br />
+<input type="text" name="code" /><br />
+
+<input type="submit" value="Submit Form" />
+</form>
+
+<?php
+} else { //form is posted
+ include("securimage.php");
+ $img = new Securimage();
+ $valid = $img->check($_POST['code']);
+
+ if($valid == true) {
+ echo "<center>Thanks, you entered the correct code.</center>";
+ } else {
+ echo "<center>Sorry, the code you entered was invalid. <a href=\"javascript:history.go(-1)\">Go back</a> to try again.</center>";
+ }
+}
+
+?>
+
+</body>
+</html>
Added: trunk/plugins/securimage/gdfonts/automatic.gdf
===================================================================
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+ application/octet-stream
Added: trunk/plugins/securimage/gdfonts/bubblebath.gdf
===================================================================
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___________________________________________________________________
Added: svn:mime-type
+ application/octet-stream
Added: trunk/plugins/securimage/gdfonts/caveman.gdf
===================================================================
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___________________________________________________________________
Added: svn:mime-type
+ application/octet-stream
Added: trunk/plugins/securimage/gdfonts/crass.gdf
===================================================================
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___________________________________________________________________
Added: svn:mime-type
+ application/octet-stream
Added: trunk/plugins/securimage/images/audio_icon.gif
===================================================================
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Property changes on: trunk/plugins/securimage/images/audio_icon.gif
___________________________________________________________________
Added: svn:mime-type
+ application/octet-stream
Added: trunk/plugins/securimage/images/refresh.gif
===================================================================
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Property changes on: trunk/plugins/securimage/images/refresh.gif
___________________________________________________________________
Added: svn:mime-type
+ application/octet-stream
Added: trunk/plugins/securimage/securimage.php
===================================================================
--- trunk/plugins/securimage/securimage.php (rev 0)
+++ trunk/plugins/securimage/securimage.php 2008-10-15 14:12:06 UTC (rev 17)
@@ -0,0 +1,932 @@
+<?php
+
+/**
+ * Project: Securimage: A PHP class for creating and managing form CAPTCHA images<br />
+ * File: securimage.php<br />
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or any later version.<br /><br />
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.<br /><br />
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA<br /><br />
+ *
+ * Any modifications to the library should be indicated clearly in the source code
+ * to inform users that the changes are not a part of the original software.<br /><br />
+ *
+ * If you found this script useful, please take a quick moment to rate it.<br />
+ * http://www.hotscripts.com/rate/49400.html Thanks.
+ *
+ * @link http://www.phpcaptcha.org Securimage PHP CAPTCHA
+ * @link http://www.phpcaptcha.org/latest.zip Download Latest Version
+ * @link http://www.phpcaptcha.org/Securimage_Docs/ Online Documentation
+ * @copyright 2007 Drew Phillips
+ * @author drew010 <dr...@dr...>
+ * @version 1.0.3.1 (March 24, 2008)
+ * @package Securimage
+ *
+ */
+
+/**
+ ChangeLog
+
+ 1.0.3.1
+ - Error reading from wordlist in some cases caused words to be cut off 1 letter short
+
+ 1.0.3
+ - Removed shadow_text from code which could cause an undefined property error due to removal from previous version
+
+ 1.0.2
+ - Audible CAPTCHA Code wav files
+ - Create codes from a word list instead of random strings
+
+ 1.0
+ - Added the ability to use a selected character set, rather than a-z0-9 only.
+ - Added the multi-color text option to use different colors for each letter.
+ - Switched to automatic session handling instead of using files for code storage
+ - Added GD Font support if ttf support is not available. Can use internal GD fonts or load new ones.
+ - Added the ability to set line thickness
+ - Added option for drawing arced lines over letters
+ - Added ability to choose image type for output
+
+*/
+
+/**
+ * Output images in JPEG format
+ */
+define('SI_IMAGE_JPEG', 1);
+/**
+ * Output images in PNG format
+ */
+define('SI_IMAGE_PNG', 2);
+/**
+ * Output images in GIF format
+ * Must have GD >= 2.0.28!
+ */
+define('SI_IMAGE_GIF', 3);
+
+/**
+ * Securimage CAPTCHA Class.
+ *
+ * @package Securimage
+ * @subpackage classes
+ *
+ */
+class Securimage {
+
+ /**
+ * The desired width of the CAPTCHA image.
+ *
+ * @var int
+ */
+ var $image_width = 175;
+
+ /**
+ * The desired width of the CAPTCHA image.
+ *
+ * @var int
+ */
+ var $image_height = 45;
+
+ /**
+ * The image format for output.<br />
+ * Valid options: SI_IMAGE_PNG, SI_IMAGE_JPG, SI_IMAGE_GIF
+ *
+ * @var int
+ */
+ var $image_type = SI_IMAGE_PNG;
+
+ /**
+ * The length of the code to generate.
+ *
+ * @var int
+ */
+ var $code_length = 4;
+
+ /**
+ * The character set for individual characters in the image.<br />
+ * Letters are converted to uppercase.<br />
+ * The font must support the letters or there may be problematic substitutions.
+ *
+ * @var string
+ */
+ var $charset = 'ABCDEFGHKLMNPRSTUVWYZ23456789';
+ //var $charset = '0123456789';
+
+ /**
+ * Create codes using this word list
+ *
+ * @var string The path to the word list to use for creating CAPTCHA codes
+ */
+ var $wordlist_file = '../words/words.txt';
+
+ /**
+ * True to use a word list file instead of a random code
+ *
+ * @var bool
+ */
+ var $use_wordlist = true;
+
+ /**
+ * Whether to use a GD font instead of a TTF font.<br />
+ * TTF offers more support and options, but use this if your PHP doesn't support TTF.<br />
+ *
+ * @var boolean
+ */
+ var $use_gd_font = false;
+
+ /**
+ * The GD font to use.<br />
+ * Internal gd fonts can be loaded by their number.<br />
+ * Alternatively, a file path can be given and the font will be loaded from file.
+ *
+ * @var mixed
+ */
+ var $gd_font_file = 'gdfonts/bubblebath.gdf';
+
+ /**
+ * The approximate size of the font in pixels.<br />
+ * This does not control the size of the font because that is determined by the GD font itself.<br />
+ * This is used to aid the calculations of positioning used by this class.<br />
+ *
+ * @var int
+ */
+ var $gd_font_size = 20;
+
+ // Note: These font options below do not apply if you set $use_gd_font to true with the exception of $text_color
+
+ /**
+ * The path to the TTF font file to load.
+ *
+ * @var string
+ */
+ var $ttf_file = "./elephant.ttf";
+
+ /**
+ * The font size.<br />
+ * Depending on your version of GD, this should be specified as the pixel size (GD1) or point size (GD2)<br />
+ *
+ * @var int
+ */
+ var $font_size = 24;
+
+ /**
+ * The minimum angle in degrees, with 0 degrees being left-to-right reading text.<br />
+ * Higher values represent a counter-clockwise rotation.<br />
+ * For example, a value of 90 would result in bottom-to-top reading text.
+ *
+ * @var int
+ */
+ var $text_angle_minimum = -20;
+
+ /**
+ * The minimum angle in degrees, with 0 degrees being left-to-right reading text.<br />
+ * Higher values represent a counter-clockwise rotation.<br />
+ * For example, a value of 90 would result in bottom-to-top reading text.
+ *
+ * @var int
+ */
+ var $text_angle_maximum = 20;
+
+ /**
+ * The X-Position on the image where letter drawing will begin.<br />
+ * This value is in pixels from the left side of the image.
+ *
+ * @var int
+ */
+ var $text_x_start = 8;
+
+ /**
+ * Letters can be spaced apart at random distances.<br />
+ * This is the minimum distance between two letters.<br />
+ * This should be <i>at least</i> as wide as a font character.<br />
+ * Small values can cause letters to be drawn over eachother.<br />
+ *
+ * @var int
+ */
+ var $text_minimum_distance = 30;
+
+ /**
+ * Letters can be spaced apart at random distances.<br />
+ * This is the maximum distance between two letters.<br />
+ * This should be <i>at least</i> as wide as a font character.<br />
+ * Small values can cause letters to be drawn over eachother.<br />
+ *
+ * @var int
+ */
+ var $text_maximum_distance = 33;
+
+ /**
+ * The background color for the image.<br />
+ * This should be specified in HTML hex format.<br />
+ * Make sure to include the preceding # sign!
+ *
+ * @var string
+ */
+ var $image_bg_color = "#e3daed";
+
+ /**
+ * The text color to use for drawing characters.<br />
+ * This value is ignored if $use_multi_text is set to true.<br />
+ * Make sure this contrasts well with the background color.<br />
+ * Specify the color in HTML hex format with preceding # sign
+ *
+ * @see Securimage::$use_multi_text
+ * @var string
+ */
+ var $text_color = "#ff0000";
+
+ /**
+ * Set to true to use multiple colors for each character.
+ *
+ * @see Securimage::$multi_text_color
+ * @var boolean
+ */
+ var $use_multi_text = true;
+
+ /**
+ * String of HTML hex colors to use.<br />
+ * Separate each possible color with commas.<br />
+ * Be sure to precede each value with the # sign.
+ *
+ * @var string
+ */
+ var $multi_text_color = "#0a68dd,#f65c47,#8d32fd";
+
+ /**
+ * Set to true to make the characters appear transparent.
+ *
+ * @see Securimage::$text_transparency_percentage
+ * @var boolean
+ */
+ var $use_transparent_text = true;
+
+ /**
+ * The percentage of transparency, 0 to 100.<br />
+ * A value of 0 is completely opaque, 100 is completely transparent (invisble)
+ *
+ * @see Securimage::$use_transparent_text
+ * @var int
+ */
+ var $text_transparency_percentage = 15;
+
+
+ // Line options
+ /**
+ * Draw vertical and horizontal lines on the image.
+ *
+ * @see Securimage::$line_color
+ * @see Securimage::$line_distance
+ * @see Securimage::$line_thickness
+ * @see Securimage::$draw_lines_over_text
+ * @var boolean
+ */
+ var $draw_lines = true;
+
+ /**
+ * The color of the lines drawn on the image.<br />
+ * Use HTML hex format with preceding # sign.
+ *
+ * @see Securimage::$draw_lines
+ * @var string
+ */
+ var $line_color = "#80BFFF";
+
+ /**
+ * How far apart to space the lines from eachother in pixels.
+ *
+ * @see Securimage::$draw_lines
+ * @var int
+ */
+ var $line_distance = 5;
+
+ /**
+ * How thick to draw the lines in pixels.<br />
+ * 1-3 is ideal depending on distance
+ *
+ * @see Securimage::$draw_lines
+ * @see Securimage::$line_distance
+ * @var int
+ */
+ var $line_thickness = 1;
+
+ /**
+ * Set to true to draw angled lines on the image in addition to the horizontal and vertical lines.
+ *
+ * @see Securimage::$draw_lines
+ * @var boolean
+ */
+ var $draw_angled_lines = false;
+
+ /**
+ * Draw the lines over the text.<br />
+ * If fales lines will be drawn before putting the text on the image.<br />
+ * This can make the image hard for humans to read depending on the line thickness and distance.
+ *
+ * @var boolean
+ */
+ var $draw_lines_over_text = false;
+
+ /**
+ * For added security, it is a good idea to draw arced lines over the letters to make it harder for bots to segment the letters.<br />
+ * Two arced lines will be drawn over the text on each side of the image.<br />
+ * This is currently expirimental and may be off in certain configurations.
+ *
+ * @var boolean
+ */
+ var $arc_linethrough = true;
+
+ /**
+ * The colors or color of the arced lines.<br />
+ * Use HTML hex notation with preceding # sign, and separate each value with a comma.<br />
+ * This should be similar to your font color for single color images.
+ *
+ * @var string
+ */
+ var $arc_line_colors = "#8080ff";
+
+ /**
+ * Full path to the WAV files to use to make the audio files, include trailing /.<br />
+ * Name Files [A-Z0-9].wav
+ *
+ * @since 1.0.1
+ * @var string
+ */
+ var $audio_path = './audio/';
+
+
+ //END USER CONFIGURATION
+ //There should be no need to edit below unless you really know what you are doing.
+
+ /**
+ * The gd image resource.
+ *
+ * @access private
+ * @var resource
+ */
+ var $im;
+
+ /**
+ * The background image resource
+ *
+ * @access private
+ * @var resource
+ */
+ var $bgimg;
+
+ /**
+ * The code generated by the script
+ *
+ * @access private
+ * @var string
+ */
+ var $code;
+
+ /**
+ * The code that was entered by the user
+ *
+ * @access private
+ * @var string
+ */
+ var $code_entered;
+
+ /**
+ * Whether or not the correct code was entered
+ *
+ * @access private
+ * @var boolean
+ */
+ var $correct_code;
+
+ /**
+ * Class constructor.<br />
+ * Because the class uses sessions, this will attempt to start a session if there is no previous one.<br />
+ * If you do not start a session before calling the class, the constructor must be called before any
+ * output is sent to the browser.
+ *
+ * <code>
+ * $securimage = new Securimage();
+ * </code>
+ *
+ */
+ function Securimage()
+ {
+ if ( session_id() == '' ) { // no session has been started yet, which is needed for validation
+ session_start();
+ }
+ }
+
+ /**
+ * Generate a code and output the image to the browser.
+ *
+ * <code>
+ * <?php
+ * include 'securimage.php';
+ * $securimage = new Securimage();
+ * $securimage->show('bg.jpg');
+ * ?>
+ * </code>
+ *
+ * @param string $background_image The path to an image to use as the background for the CAPTCHA
+ */
+ function show($background_image = "")
+ {
+ if($background_image != "" && is_readable($background_image)) {
+ $this->bgimg = $background_image;
+ }
+
+ $this->doImage();
+ }
+
+ /**
+ * Validate the code entered by the user.
+ *
+ * <code>
+ * $code = $_POST['code'];
+ * if ($securimage->check($code) == false) {
+ * die("Sorry, the code entered did not match.");
+ * } else {
+ * $valid = true;
+ * }
+ * </code>
+ * @param string $code The code the user entered
+ * @return boolean true if the code was correct, false if not
+ */
+ function check($code)
+ {
+ $this->code_entered = $code;
+ $this->validate();
+ return $this->correct_code;
+ }
+
+ /**
+ * Generate and output the image
+ *
+ * @access private
+ *
+ */
+ function doImage()
+ {
+ if($this->use_transparent_text == true || $this->bgimg != "") {
+ $this->im = imagecreatetruecolor($this->image_width, $this->image_height);
+ $bgcolor = imagecolorallocate($this->im, hexdec(substr($this->image_bg_color, 1, 2)), hexdec(substr($this->image_bg_color, 3, 2)), hexdec(substr($this->image_bg_color, 5, 2)));
+ imagefilledrectangle($this->im, 0, 0, imagesx($this->im), imagesy($this->im), $bgcolor);
+ } else { //no transparency
+ $this->im = imagecreate($this->image_width, $this->image_height);
+ $bgcolor = imagecolorallocate($this->im, hexdec(substr($this->image_bg_color, 1, 2)), hexdec(substr($this->image_bg_color, 3, 2)), hexdec(substr($this->image_bg_color, 5, 2)));
+ }
+
+ if($this->bgimg != "") { $this->setBackground(); }
+
+ $this->createCode();
+
+ if (!$this->draw_lines_over_text && $this->draw_lines) $this->drawLines();
+
+ $this->drawWord();
+
+ if ($this->arc_linethrough == true) $this->arcLines();
+
+ if ($this->draw_lines_over_text && $this->draw_lines) $this->drawLines();
+
+ $this->output();
+
+ }
+
+ /**
+ * Set the background of the CAPTCHA image
+ *
+ * @access private
+ *
+ */
+ function setBackground()
+ {
+ $dat = @getimagesize($this->bgimg);
+ if($dat == false) { return; }
+
+ switch($dat[2]) {
+ case 1: $newim = @imagecreatefromgif($this->bgimg); break;
+ case 2: $newim = @imagecreatefromjpeg($this->bgimg); break;
+ case 3: $newim = @imagecreatefrompng($this->bgimg); break;
+ case 15: $newim = @imagecreatefromwbmp($this->bgimg); break;
+ case 16: $newim = @imagecreatefromxbm($this->bgimg); break;
+ default: return;
+ }
+
+ if(!$newim) return;
+
+ imagecopy($this->im, $newim, 0, 0, 0, 0, $this->image_width, $this->image_height);
+ }
+
+ /**
+ * Draw arced lines over the text
+ *
+ * @access private
+ *
+ */
+ function arcLines()
+ {
+ $colors = explode(',', $this->arc_line_colors);
+ imagesetthickness($this->im, 3);
+
+ $color = $colors[rand(0, sizeof($colors) - 1)];
+ $linecolor = imagecolorallocate($this->im, hexdec(substr($color, 1, 2)), hexdec(substr($color, 3, 2)), hexdec(substr($color, 5, 2)));
+
+ $xpos = $this->text_x_start + ($this->font_size * 2) + rand(-5, 5);
+ $width = $this->image_width / 2.66 + rand(3, 10);
+ $height = $this->font_size * 2.14 - rand(3, 10);
+
+ if ( rand(0,100) % 2 == 0 ) {
+ $start = rand(0,66);
+ $ypos = $this->image_height / 2 - rand(5, 15);
+ $xpos += rand(5, 15);
+ } else {
+ $start = rand(180, 246);
+ $ypos = $this->image_height / 2 + rand(5, 15);
+ }
+
+ $end = $start + rand(75, 110);
+
+ imagearc($this->im, $xpos, $ypos, $width, $height, $start, $end, $linecolor);
+
+ $color = $colors[rand(0, sizeof($colors) - 1)];
+ $linecolor = imagecolorallocate($this->im, hexdec(substr($color, 1, 2)), hexdec(substr($color, 3, 2)), hexdec(substr($color, 5, 2)));
+
+ if ( rand(1,75) % 2 == 0 ) {
+ $start = rand(45, 111);
+ $ypos = $this->image_height / 2 - rand(5, 15);
+ $xpos += rand(5, 15);
+ } else {
+ $start = rand(200, 250);
+ $ypos = $this->image_height / 2 + rand(5, 15);
+ }
+
+ $end = $start + rand(75, 100);
+
+ imagearc($this->im, $this->image_width * .75, $ypos, $width, $height, $start, $end, $linecolor);
+ }
+
+ /**
+ * Draw lines on the image
+ *
+ * @access private
+ *
+ */
+ function drawLines()
+ {
+ $linecolor = imagecolorallocate($this->im, hexdec(substr($this->line_color, 1, 2)), hexdec(substr($this->line_color, 3, 2)), hexdec(substr($this->line_color, 5, 2)));
+ imagesetthickness($this->im, $this->line_thickness);
+
+ //vertical lines
+ for($x = 1; $x < $this->image_width; $x += $this->line_distance) {
+ imageline($this->im, $x, 0, $x, $this->image_height, $linecolor);
+ }
+
+ //horizontal lines
+ for($y = 11; $y < $this->image_height; $y += $this->line_distance) {
+ imageline($this->im, 0, $y, $this->image_width, $y, $linecolor);
+ }
+
+ if ($this->draw_angled_lines == true) {
+ for ($x = -($this->image_height); $x < $this->image_width; $x += $this->line_distance) {
+ imageline($this->im, $x, 0, $x + $this->image_height, $this->image_height, $linecolor);
+ }
+
+ for ($x = $this->image_width + $this->image_height; $x > 0; $x -= $this->line_distance) {
+ imageline($this->im, $x, 0, $x - $this->image_height, $this->image_height, $linecolor);
+ }
+ }
+ }
+
+ /**
+ * Draw the CAPTCHA code over the image
+ *
+ * @access private
+ *
+ */
+ function drawWord()
+ {
+ if ($this->use_gd_font == true) {
+ if (!is_int($this->gd_font_file)) { //is a file name
+ $font = @imageloadfont($this->gd_font_file);
+ if ($font == false) {
+ trigger_error("Failed to load GD Font file {$this->gd_font_file} ", E_USER_WARNING);
+ return;
+ }
+ } else { //gd font identifier
+ $font = $this->gd_font_file;
+ }
+
+ $color = imagecolorallocate($this->im, hexdec(substr($this->text_color, 1, 2)), hexdec(substr($this->text_color, 3, 2)), hexdec(substr($this->text_color, 5, 2)));
+ imagestring($this->im, $font, $this->text_x_start, ($this->image_height / 2) - ($this->gd_font_size / 2), $this->code, $color);
+
+ } else { //ttf font
+ if($this->use_transparent_text == true) {
+ $alpha = intval($this->text_transparency_percentage / 100 * 127);
+ $font_color = imagecolorallocatealpha($this->im, hexdec(substr($this->text_color, 1, 2)), hexdec(substr($this->text_color, 3, 2)), hexdec(substr($this->text_color, 5, 2)), $alpha);
+ } else { //no transparency
+ $font_color = imagecolorallocate($this->im, hexdec(substr($this->text_color, 1, 2)), hexdec(substr($this->text_color, 3, 2)), hexdec(substr($this->text_color, 5, 2)));
+ }
+
+ $x = $this->text_x_start;
+ $strlen = strlen($this->code);
+ $y_min = ($this->image_height / 2) + ($this->font_size / 2) - 2;
+ $y_max = ($this->image_height / 2) + ($this->font_size / 2) + 2;
+ $colors = explode(',', $this->multi_text_color);
+
+ for($i = 0; $i < $strlen; ++$i) {
+ $angle = rand($this->text_angle_minimum, $this->text_angle_maximum);
+ $y = rand($y_min, $y_max);
+ if ($this->use_multi_text == true) {
+ $idx = rand(0, sizeof($colors) - 1);
+ $r = substr($colors[$idx], 1, 2);
+ $g = substr($colors[$idx], 3, 2);
+ $b = substr($colors[$idx], 5, 2);
+ if($this->use_transparent_text == true) {
+ $font_color = imagecolorallocatealpha($this->im, "0x$r", "0x$g", "0x$b", $alpha);
+ } else {
+ $font_color = imagecolorallocate($this->im, "0x$r", "0x$g", "0x$b");
+ }
+ }
+ imagettftext($this->im, $this->font_size, $angle, $x, $y, $font_color, $this->ttf_file, $this->code{$i});
+
+ $x += rand($this->text_minimum_distance, $this->text_maximum_distance);
+ } //for loop
+ } //else ttf font
+ } //function
+
+ /**
+ * Create a code and save to the session
+ *
+ * @since 1.0.1
+ *
+ */
+ function createCode()
+ {
+ $this->code = false;
+
+ if ($this->use_wordlist && is_readable($this->wordlist_file)) {
+ $this->code = $this->readCodeFromFile();
+ }
+
+ if ($this->code == false) {
+ $this->code = $this->generateCode($this->code_length);
+ }
+
+ $this->saveData();
+ }
+
+ /**
+ * Generate a code
+ *
+ * @access private
+ * @param int $len The code length
+ * @return string
+ */
+ function generateCode($len)
+ {
+ $code = '';
+
+ for($i = 1, $cslen = strlen($this->charset); $i <= $len; ++$i) {
+ $code .= strtoupper( $this->charset{rand(0, $cslen - 1)} );
+ }
+ return $code;
+ }
+
+ /**
+ * Reads a word list file to get a code
+ *
+ * @access private
+ * @since 1.0.2
+ * @return mixed false on failure, a word on success
+ */
+ function readCodeFromFile()
+ {
+ $fp = @fopen($this->wordlist_file, 'rb');
+ if (!$fp) return false;
+
+ $fsize = filesize($this->wordlist_file);
+ if ($fsize < 32) return false; // too small of a list to be effective
+
+ if ($fsize < 128) {
+ $max = $fsize; // still pretty small but changes the range of seeking
+ } else {
+ $max = 128;
+ }
+
+ fseek($fp, rand(0, $fsize - $max), SEEK_SET);
+ $data = fread($fp, 128); // read a random 128 bytes from file
+ fclose($fp);
+ $data = preg_replace("/\r?\n/", "\n", $data);
+
+ $start = strpos($data, "\n", rand(0, 100)) + 1; // random start position
+ $end = strpos($data, "\n", $start); // find end of word
+
+ return strtolower(substr($data, $start, $end - $start)); // return substring in 128 bytes
+ }
+
+ /**
+ * Output image to the browser
+ *
+ * @access private
+ *
+ */
+ function output()
+ {
+ header("Expires: Sun, 1 Jan 2000 12:00:00 GMT");
+ header("Last-Modified: " . gmdate("D, d M Y H:i:s") . "GMT");
+ header("Cache-Control: no-store, no-cache, must-revalidate");
+ header("Cache-Control: post-check=0, pre-check=0", false);
+ header("Pragma: no-cache");
+
+ switch($this->image_type)
+ {
+ case SI_IMAGE_JPEG:
+ header("Content-Type: image/jpeg");
+ imagejpeg($this->im, null, 90);
+ break;
+
+ case SI_IMAGE_GIF:
+ header("Content-Type: image/gif");
+ imagegif($this->im);
+ break;
+
+ default:
+ header("Content-Type: image/png");
+ imagepng($this->im);
+ break;
+ }
+
+ imagedestroy($this->im);
+ }
+
+ /**
+ * Get WAV file data of the spoken code.<br />
+ * This is appropriate for output to the browser as audio/x-wav
+ *
+ * @since 1.0.1
+ * @return string WAV data
+ *
+ */
+ function getAudibleCode()
+ {
+ $letters = array();
+ $code = $this->getCode();
+
+ if ($code == '') {
+ $this->createCode();
+ $code = $this->getCode();
+ }
+
+ for($i = 0; $i < strlen($code); ++$i) {
+ $letters[] = $code{$i};
+ }
+
+ return $this->generateWAV($letters);
+ }
+
+ /**
+ * Save the code in the session
+ *
+ * @access private
+ *
+ */
+ function saveData()
+ {
+ $_SESSION['securimage_code_value'] = strtolower($this->code);
+ }
+
+ /**
+ * Validate the code to the user code
+ *
+ * @access private
+ *
+ */
+ function validate()
+ {
+ if ( isset($_SESSION['securimage_code_value']) && !empty($_SESSION['securimage_code_value']) ) {
+ if ( $_SESSION['securimage_code_value'] == strtolower(trim($this->code_entered)) ) {
+ $this->correct_code = true;
+ $_SESSION['securimage_code_value'] = '';
+ } else {
+ $this->correct_code = false;
+ }
+ } else {
+ $this->correct_code = false;
+ }
+ }
+
+ /**
+ * Get the captcha code
+ *
+ * @since 1.0.1
+ * @return string
+ */
+ function getCode()
+ {
+ if (isset($_SESSION['securimage_code_value']) && !empty($_SESSION['securimage_code_value'])) {
+ return $_SESSION['securimage_code_value'];
+ } else {
+ return '';
+ }
+ }
+
+ /**
+ * Check if the user entered code was correct
+ *
+ * @access private
+ * @return boolean
+ */
+ function checkCode()
+ {
+ return $this->correct_code;
+ }
+
+ /**
+ * Generate a wav file by concatenating individual files
+ * @since 1.0.1
+ * @access private
+ * @param array $letters Array of letters to build a file from
+ * @return string WAV file data
+ */
+ function generateWAV($letters)
+ {
+ $first = true; // use first file to write the header...
+ $data_len = 0;
+ $files = array();
+ $out_data = '';
+
+ foreach ($letters as $letter) {
+ $filename = $this->audio_path . strtoupper($letter) . '.wav';
+
+ $fp = fopen($filename, 'rb');
+
+ $file = array();
+
+ $data = fread($fp, filesize($filename)); // read file in
+
+ $header = substr($data, 0, 36);
+ $body = substr($data, 44);
+
+
+ $data = unpack('NChunkID/VChunkSize/NFormat/NSubChunk1ID/VSubChunk1Size/vAudioFormat/vNumChannels/VSampleRate/VByteRate/vBlockAlign/vBitsPerSample', $header);
+
+ $file['sub_chunk1_id'] = $data['SubChunk1ID'];
+ $file['bits_per_sample'] = $data['BitsPerSample'];
+ $file['channels'] = $data['NumChannels'];
+ $file['format'] = $data['AudioFormat'];
+ $file['sample_rate'] = $data['SampleRate'];
+ $file['size'] = $data['ChunkSize'] + 8;
+ $file['data'] = $body;
+
+ if ( ($p = strpos($file['data'], 'LIST')) !== false) {
+ // If the LIST data is not at the end of the file, this will probably break your sound file
+ $info = substr($file['data'], $p + 4, 8);
+ $data = unpack('Vlength/Vjunk', $info);
+ $file['data'] = substr($file['data'], 0, $p);
+ $file['size'] = $file['size'] - (strlen($file['data']) - $p);
+ }
+
+ $files[] = $file;
+ $data = null;
+ $header = null;
+ $body = null;
+
+ $data_len += strlen($file['data']);
+
+ fclose($fp);
+ }
+
+ $out_data = '';
+ for($i = 0; $i < sizeof($files); ++$i) {
+ if ($i == 0) { // output header
+ $out_data .= pack('C4VC8', ord('R'), ord('I'), ord('F'), ord('F'), $data_len + 36, ord('W'), ord('A'), ord('V'), ord('E'), ord('f'), ord('m'), ord('t'), ord(' '));
+
+ $out_data .= pack('VvvVVvv',
+ 16,
+ $files[$i]['format'],
+ $files[$i]['channels'],
+ $files[$i]['sample_rate'],
+ $files[$i]['sample_rate'] * (($files[$i]['bits_per_sample'] * $files[$i]['channels']) / 8),
+ ($files[$i]['bits_per_sample'] * $files[$i]['channels']) / 8,
+ $files[$i]['bits_per_sample'] );
+
+ $out_data .= pack('C4', ord('d'), ord('a'), ord('t'), ord('a'));
+
+ $ou...
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