1 | <?php |
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2 | /** |
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3 | * CAPTCHA class For XOOPS |
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4 | * |
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5 | * You may not change or alter any portion of this comment or credits |
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6 | * of supporting developers from this source code or any supporting source code |
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7 | * which is considered copyrighted (c) material of the original comment or credit authors. |
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8 | * This program is distributed in the hope that it will be useful, |
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9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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11 | * |
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12 | * @copyright (c) 2000-2021 XOOPS Project (https://xoops.org) |
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13 | * @license GNU GPL 2 (https://www.gnu.org/licenses/gpl-2.0.html) |
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14 | * @since 2.3.0 |
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15 | * @author Taiwen Jiang <[email protected]> |
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16 | * @package class |
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17 | * @subpackage CAPTCHA |
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18 | */ |
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19 | |||
20 | include __DIR__ . '/../../../../mainfile.php'; |
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21 | |||
22 | error_reporting(0); |
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23 | $xoopsLogger->activated = false; |
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24 | |||
25 | /** |
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26 | * Class XoopsCaptchaImageHandler |
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27 | */ |
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28 | class XoopsCaptchaImageHandler |
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29 | { |
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30 | public $config = []; |
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31 | public $code; |
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32 | public $mode = 'gd'; |
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33 | public $invalid = false; |
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34 | |||
35 | public $oImage; |
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36 | public $font; |
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37 | public $spacing; |
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38 | public $width; |
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39 | public $height; |
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40 | |||
41 | public $captchaHandler; |
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42 | |||
43 | /** |
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44 | * |
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45 | */ |
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46 | public function __construct() |
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47 | { |
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48 | xoops_load('XoopsCaptcha'); |
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49 | $this->captchaHandler = XoopsCaptcha::getInstance(); |
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50 | $this->config = $this->captchaHandler->loadConfig('image'); |
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51 | } |
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52 | |||
53 | public function loadImage() |
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54 | { |
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55 | $this->generateCode(); |
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56 | $this->createImage(); |
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57 | } |
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58 | |||
59 | /** |
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60 | * Create Code |
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61 | */ |
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62 | public function generateCode() |
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63 | { |
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64 | if ($this->invalid) { |
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65 | return false; |
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66 | } |
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67 | |||
68 | if ($this->mode === 'bmp') { |
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69 | $this->config['num_chars'] = 4; |
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70 | $this->code = mt_rand(10 ** ($this->config['num_chars'] - 1), (int)str_pad('9', $this->config['num_chars'], '9')); |
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71 | } else { |
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72 | $raw_code = md5(uniqid(mt_rand(), true)); |
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73 | if (!empty($this->config['skip_characters'])) { |
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74 | $valid_code = str_replace($this->config['skip_characters'], '', $raw_code); |
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75 | $this->code = substr($valid_code, 0, $this->config['num_chars']); |
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76 | } else { |
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77 | $this->code = substr($raw_code, 0, $this->config['num_chars']); |
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78 | } |
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79 | if (!$this->config['casesensitive']) { |
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80 | $this->code = strtoupper($this->code); |
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81 | } |
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82 | } |
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83 | $this->captchaHandler->setCode($this->code); |
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84 | |||
85 | return true; |
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86 | } |
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87 | |||
88 | /** |
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89 | * @return string|bool |
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90 | */ |
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91 | public function createImage() |
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92 | { |
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93 | if ($this->invalid) { |
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94 | header('Content-type: image/gif'); |
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95 | readfile(XOOPS_ROOT_PATH . '/images/subject/icon2.gif'); |
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96 | |||
97 | return null; |
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98 | } |
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99 | |||
100 | if ($this->mode === 'bmp') { |
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101 | return $this->createImageBmp(); |
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102 | } else { |
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103 | return $this->createImageGd(); |
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104 | } |
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105 | } |
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106 | |||
107 | /** |
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108 | * @param string $name |
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109 | * @param string $extension |
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110 | * |
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111 | * @return array|mixed |
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112 | */ |
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113 | public function getList($name, $extension = '') |
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114 | { |
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115 | xoops_load('XoopsCache'); |
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116 | if ($items = XoopsCache::read("captcha_captcha_{$name}")) { |
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117 | return $items; |
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118 | } |
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119 | |||
120 | require_once XOOPS_ROOT_PATH . '/class/xoopslists.php'; |
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121 | $file_path = XOOPS_ROOT_PATH . "/class/captcha/image/{$name}"; |
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122 | $files = XoopsLists::getFileListAsArray($file_path); |
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123 | $items = []; |
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124 | foreach ($files as $item) { |
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125 | if (empty($extension) || preg_match("/(\.{$extension})$/i", $item)) { |
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126 | $items[] = $item; |
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127 | } |
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128 | } |
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129 | XoopsCache::write("captcha_captcha_{$name}", $items); |
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130 | |||
131 | return $items; |
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132 | } |
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133 | |||
134 | /** |
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135 | * Create CAPTCHA iamge with GD |
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136 | * Originated by DuGris' SecurityImage |
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137 | * --------------------------------------------------------------------------- // |
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138 | * Class : SecurityImage 1.5 // |
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139 | * Author: DuGris aka L. Jen <http://www.dugris.info> // |
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140 | * Email : [email protected] // |
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141 | * Licence: GNU // |
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142 | * Project: The XOOPS Project // |
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143 | * --------------------------------------------------------------------------- // |
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144 | */ |
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145 | public function createImageGd() |
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146 | { |
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147 | $this->loadFont(); |
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148 | $this->setImageSize(); |
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149 | |||
150 | $this->oImage = imagecreatetruecolor((int)$this->width, (int)$this->height); |
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151 | $background = imagecolorallocate($this->oImage, 255, 255, 255); |
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152 | imagefilledrectangle($this->oImage, 0, 0, (int)$this->width, (int)$this->height, $background); |
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153 | |||
154 | switch ($this->config['background_type']) { |
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155 | default: |
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156 | case 0: |
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157 | $this->drawBars(); |
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158 | break; |
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159 | |||
160 | case 1: |
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161 | $this->drawCircles(); |
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162 | break; |
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163 | |||
164 | case 2: |
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165 | $this->drawLines(); |
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166 | break; |
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167 | |||
168 | case 3: |
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169 | $this->drawRectangles(); |
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170 | break; |
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171 | |||
172 | case 4: |
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173 | $this->drawEllipses(); |
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174 | break; |
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175 | |||
176 | case 5: |
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177 | $this->drawPolygons(); |
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178 | break; |
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179 | |||
180 | case 100: |
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181 | $this->createFromFile(); |
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182 | break; |
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183 | } |
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184 | $this->drawBorder(); |
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185 | $this->drawCode(); |
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186 | |||
187 | header('Content-type: image/jpeg'); |
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188 | if (!imagejpeg($this->oImage)) { |
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189 | // Log or handle the error as you see fit |
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190 | return false; |
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191 | } |
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192 | |||
193 | if (!imagedestroy($this->oImage)) { |
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194 | // Log or handle the error as you see fit |
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195 | return false; |
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196 | } |
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197 | |||
198 | return true; |
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199 | } |
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200 | |||
201 | public function loadFont() |
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202 | { |
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203 | $fonts = $this->getList('fonts', 'ttf'); |
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204 | $this->font = XOOPS_ROOT_PATH . '/class/captcha/image/fonts/' . $fonts[array_rand($fonts)]; |
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205 | } |
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206 | |||
207 | public function setImageSize() |
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208 | { |
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209 | $MaxCharWidth = 0; |
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210 | $MaxCharHeight = 0; |
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211 | $oImage = imagecreatetruecolor(100, 100); |
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212 | $text_color = imagecolorallocate($oImage, mt_rand(0, 100), mt_rand(0, 100), mt_rand(0, 100)); |
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213 | $FontSize = $this->config['fontsize_max']; |
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214 | for ($Angle = -30; $Angle <= 30; ++$Angle) { |
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215 | for ($i = 65; $i <= 90; ++$i) { |
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216 | $CharDetails = imageftbbox($FontSize, $Angle, $this->font, chr($i), []); |
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217 | $_MaxCharWidth = abs($CharDetails[0] + $CharDetails[2]); |
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218 | if ($_MaxCharWidth > $MaxCharWidth) { |
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219 | $MaxCharWidth = $_MaxCharWidth; |
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220 | } |
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221 | $_MaxCharHeight = abs($CharDetails[1] + $CharDetails[5]); |
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222 | if ($_MaxCharHeight > $MaxCharHeight) { |
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223 | $MaxCharHeight = $_MaxCharHeight; |
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224 | } |
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225 | } |
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226 | } |
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227 | imagedestroy($oImage); |
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228 | |||
229 | $this->height = $MaxCharHeight + 2; |
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230 | $this->spacing = (int)(($this->config['num_chars'] * $MaxCharWidth) / $this->config['num_chars']); |
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231 | $this->width = ($this->config['num_chars'] * $MaxCharWidth) + ($this->spacing / 2); |
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232 | } |
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233 | |||
234 | /** |
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235 | * Return random background |
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236 | * |
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237 | * @return string|null |
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238 | */ |
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239 | public function loadBackground() |
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240 | { |
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241 | $RandBackground = null; |
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242 | if ($backgrounds = $this->getList('backgrounds', '(gif|jpg|png)')) { |
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243 | $RandBackground = XOOPS_ROOT_PATH . '/class/captcha/image/backgrounds/' . $backgrounds[array_rand($backgrounds)]; |
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244 | } |
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245 | |||
246 | return $RandBackground; |
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247 | } |
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248 | |||
249 | /** |
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250 | * Draw Image background |
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251 | */ |
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252 | public function createFromFile() |
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253 | { |
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254 | if ($RandImage = $this->loadBackground()) { |
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255 | $ImageType = @getimagesize($RandImage); |
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256 | if (isset($ImageType[2])) { |
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257 | switch ($ImageType[2]) { |
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258 | case 1: |
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259 | $BackgroundImage = imagecreatefromgif($RandImage); |
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260 | break; |
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261 | |||
262 | case 2: |
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263 | $BackgroundImage = imagecreatefromjpeg($RandImage); |
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264 | break; |
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265 | |||
266 | case 3: |
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267 | $BackgroundImage = imagecreatefrompng($RandImage); |
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268 | break; |
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269 | } |
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270 | } |
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271 | } |
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272 | if (!empty($BackgroundImage)) { |
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273 | imagecopyresized($this->oImage, $BackgroundImage, 0, 0, 0, 0, imagesx($this->oImage), imagesy($this->oImage), imagesx($BackgroundImage), imagesy($BackgroundImage)); |
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274 | imagedestroy($BackgroundImage); |
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275 | } else { |
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276 | $this->drawBars(); |
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277 | } |
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278 | } |
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279 | |||
280 | /** |
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281 | * Draw Code |
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282 | */ |
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283 | public function drawCode() |
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284 | { |
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285 | for ($i = 0; $i < $this->config['num_chars']; ++$i) { |
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286 | // select random greyscale colour |
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287 | $text_color = imagecolorallocate($this->oImage, mt_rand(0, 100), mt_rand(0, 100), mt_rand(0, 100)); |
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288 | |||
289 | // write text to image |
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290 | $Angle = mt_rand(10, 30); |
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291 | if ($i % 2) { |
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292 | $Angle = mt_rand(-30, -10); |
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293 | } |
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294 | |||
295 | // select random font size |
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296 | $FontSize = mt_rand($this->config['fontsize_min'], $this->config['fontsize_max']); |
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297 | |||
298 | $CharDetails = imageftbbox($FontSize, $Angle, $this->font, $this->code[$i], []); |
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299 | $CharHeight = abs($CharDetails[1] + $CharDetails[5]); |
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300 | |||
301 | // calculate character starting coordinates |
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302 | $posX = ($this->spacing / 2) + ($i * $this->spacing); |
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303 | $posY = 2 + ($this->height / 2) + ($CharHeight / 4); |
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304 | |||
305 | imagefttext($this->oImage, $FontSize, $Angle, (int)$posX, (int)$posY, $text_color, $this->font, $this->code[$i], []); |
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306 | } |
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307 | } |
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308 | |||
309 | /** |
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310 | * Draw Border |
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311 | */ |
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312 | public function drawBorder() |
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313 | { |
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314 | $rgb = mt_rand(50, 150); |
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315 | $border_color = imagecolorallocate($this->oImage, $rgb, $rgb, $rgb); |
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316 | imagerectangle($this->oImage, 0, 0, $this->width - 1, $this->height - 1, $border_color); |
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317 | } |
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318 | |||
319 | /** |
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320 | * Draw Circles background |
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321 | */ |
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322 | public function drawCircles() |
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323 | { |
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324 | for ($i = 1; $i <= $this->config['background_num']; ++$i) { |
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325 | $randomcolor = imagecolorallocate($this->oImage, mt_rand(190, 255), mt_rand(190, 255), mt_rand(190, 255)); |
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326 | imagefilledellipse($this->oImage, mt_rand(0, $this->width - 10), mt_rand(0, $this->height - 3), mt_rand(10, 20), mt_rand(20, 30), $randomcolor); |
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327 | } |
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328 | } |
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329 | |||
330 | /** |
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331 | * Draw Lines background |
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332 | */ |
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333 | public function drawLines() |
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334 | { |
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335 | for ($i = 0; $i < $this->config['background_num']; ++$i) { |
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336 | $randomcolor = imagecolorallocate($this->oImage, mt_rand(190, 255), mt_rand(190, 255), mt_rand(190, 255)); |
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337 | imageline($this->oImage, mt_rand(0, $this->width), mt_rand(0, $this->height), mt_rand(0, $this->width), mt_rand(0, $this->height), $randomcolor); |
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338 | } |
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339 | } |
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340 | |||
341 | /** |
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342 | * Draw Rectangles background |
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343 | */ |
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344 | public function drawRectangles() |
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345 | { |
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346 | for ($i = 1; $i <= $this->config['background_num']; ++$i) { |
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347 | $randomcolor = imagecolorallocate($this->oImage, mt_rand(190, 255), mt_rand(190, 255), mt_rand(190, 255)); |
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348 | imagefilledrectangle($this->oImage, mt_rand(0, $this->width), mt_rand(0, $this->height), mt_rand(0, $this->width), mt_rand(0, $this->height), $randomcolor); |
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349 | } |
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350 | } |
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351 | |||
352 | /** |
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353 | * Draw Bars background |
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354 | */ |
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355 | public function drawBars() |
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356 | { |
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357 | for ($i = 0; $i <= $this->height;) { |
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358 | $randomcolor = imagecolorallocate($this->oImage, mt_rand(190, 255), mt_rand(190, 255), mt_rand(190, 255)); |
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359 | imageline($this->oImage, 0, (int)$i, (int)$this->width, (int)$i, (int)$randomcolor); |
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360 | $i += 2.5; |
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361 | } |
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362 | for ($i = 0; $i <= $this->width;) { |
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363 | $randomcolor = imagecolorallocate($this->oImage, mt_rand(190, 255), mt_rand(190, 255), mt_rand(190, 255)); |
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364 | imageline($this->oImage, (int)$i, 0, (int)$i, (int)$this->height, (int)$randomcolor); |
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365 | $i += 2.5; |
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366 | } |
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367 | } |
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368 | |||
369 | /** |
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370 | * Draw Ellipses background |
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371 | */ |
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372 | public function drawEllipses() |
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373 | { |
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374 | for ($i = 1; $i <= $this->config['background_num']; ++$i) { |
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375 | $randomcolor = imagecolorallocate($this->oImage, mt_rand(190, 255), mt_rand(190, 255), mt_rand(190, 255)); |
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376 | imageellipse($this->oImage, mt_rand(0, $this->width), mt_rand(0, $this->height), mt_rand(0, $this->width), mt_rand(0, $this->height), $randomcolor); |
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377 | } |
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378 | } |
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379 | |||
380 | /** |
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381 | * Draw polygons background |
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382 | */ |
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383 | public function drawPolygons() |
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384 | { |
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385 | for ($i = 1; $i <= $this->config['background_num']; ++$i) { |
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386 | $randomcolor = imagecolorallocate($this->oImage, mt_rand(190, 255), mt_rand(190, 255), mt_rand(190, 255)); |
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387 | $coords = []; |
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388 | for ($j = 1; $j <= $this->config['polygon_point']; ++$j) { |
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389 | $coords[] = mt_rand(0, $this->width); |
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390 | $coords[] = mt_rand(0, $this->height); |
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391 | } |
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392 | imagefilledpolygon($this->oImage, $coords, $this->config['polygon_point'], $randomcolor); |
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393 | } |
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394 | } |
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395 | /**#@-*/ |
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396 | |||
397 | /** |
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398 | * Create CAPTCHA image with BMP |
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399 | * |
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400 | * TODO |
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401 | * @param string $file |
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402 | * @return string |
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403 | */ |
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404 | public function createImageBmp($file = '') |
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405 | { |
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406 | $image = ''; |
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407 | |||
408 | if (empty($file)) { |
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409 | header('Content-type: image/bmp'); |
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410 | echo $image; |
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411 | } else { |
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412 | return $image; |
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413 | } |
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414 | return null; |
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415 | } |
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416 | } |
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417 | |||
418 | $imageHandler = new XoopsCaptchaImageHandler(); |
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419 | $imageHandler->loadImage(); |
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420 |