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Code source de Mantis 1.1.0rc3 |
1 <?php 2 # Mantis - a php based bugtracking system 3 4 # Copyright (C) 2000 - 2002 Kenzaburo Ito - kenito@300baud.org 5 # Copyright (C) 2002 - 2007 Mantis Team - mantisbt-dev@lists.sourceforge.net 6 7 # Mantis is free software: you can redistribute it and/or modify 8 # it under the terms of the GNU General Public License as published by 9 # the Free Software Foundation, either version 2 of the License, or 10 # (at your option) any later version. 11 # 12 # Mantis is distributed in the hope that it will be useful, 13 # but WITHOUT ANY WARRANTY; without even the implied warranty of 14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 # GNU General Public License for more details. 16 # 17 # You should have received a copy of the GNU General Public License 18 # along with Mantis. If not, see <http://www.gnu.org/licenses/>. 19 20 # -------------------------------------------------------- 21 # $Id: make_captcha_img.php,v 1.8.20.1 2007-10-13 22:33:22 giallu Exp $ 22 # -------------------------------------------------------- 23 24 # ====================================================================== 25 # Author: Marcello Scata' <marcelloscata at users.sourceforge.net> ITALY 26 # ====================================================================== 27 28 # ob_start(); 29 require_once ( 'core.php' ); 30 # ob_flush(); 31 32 $f_public_key = gpc_get_int( 'public_key' ); 33 34 $t_key = strtolower( substr( md5( config_get( 'password_confirm_hash_magic_string' ) . $f_public_key ), 1, 5) ); 35 $t_system_font_folder = config_get( 'system_font_folder' ); 36 $t_font_per_captcha = config_get( 'font_per_captcha' ); 37 38 $t_captcha_init = array( 39 'TTF_folder' => $t_system_font_folder, 40 'TTF_RANGE' => array( $t_font_per_captcha ) 41 ); 42 43 $captcha =& new masc_captcha( $t_captcha_init ); 44 $captcha->make_captcha( $t_key ); 45 46 # 47 # The class below was derived from 48 # http://www.phpclasses.org/browse/package/1163.html 49 # 50 # *** 3.0 Author 51 # Pascal Rehfeldt 52 # Pascal@Pascal-Rehfeldt.com 53 # 54 # http://www.phpclasses.org/browse.html/author/102754.html 55 # 56 # 57 # *** 3.1 License 58 # GNU General Public License (Version 2, June 1991) 59 # 60 # This program is free software; you can redistribute 61 # it and/or modify it under the terms of the GNU 62 # General Public License as published by the Free 63 # Software Foundation; either version 2 of the License, 64 # or (at your option) any later version. 65 # 66 # This program is distributed in the hope that it will 67 # be useful, but WITHOUT ANY WARRANTY; without even the 68 # implied warranty of MERCHANTABILITY or FITNESS FOR A 69 # PARTICULAR PURPOSE. See the GNU General Public License 70 # for more details. 71 # 72 73 class masc_captcha 74 { 75 var $TTF_folder; 76 var $TTF_RANGE = array('ARIAL.TTF'); 77 var $chars = 5; 78 var $minsize = 15; 79 var $maxsize = 15; 80 var $maxrotation = 30; 81 var $noise = FALSE; 82 var $websafecolors = TRUE; 83 var $debug = FALSE; 84 85 var $lx; // width of picture 86 var $ly; // height of picture 87 var $jpegquality = 80; // image quality 88 var $noisefactor = 9; // this will multiplyed with number of chars 89 var $nb_noise; // number of background-noise-characters 90 var $TTF_file; // holds the current selected TrueTypeFont 91 var $gd_version; // holds the Version Number of GD-Library 92 var $r; 93 var $g; 94 var $b; 95 96 97 function masc_captcha( $config ) 98 { 99 // Test for GD-Library(-Version) 100 $this->gd_version = get_gd_version(); 101 if($this->gd_version == 0) die("There is no GD-Library-Support enabled. The Captcha-Class cannot be used!"); 102 if($this->debug) echo "\n<br />-Captcha-Debug: The available GD-Library has major version ".$this->gd_version; 103 104 // extracts config array 105 if(is_array($config)) 106 { 107 if($this->debug) echo "\n<br />-Captcha-Debug: Extracts Config-Array in unsecure-mode!"; 108 foreach($config as $k=>$v) $this->$k = $v; 109 } 110 111 // check vars for maxtry, secretposition and min-max-size 112 if($this->minsize > $this->maxsize) 113 { 114 $temp = $this->minsize; 115 $this->minsize = $this->maxsize; 116 $this->maxsize = $temp; 117 if($this->debug) echo "<br />-Captcha-Debug: Arrghh! What do you think I mean with min and max? Switch minsize with maxsize."; 118 } 119 120 // check TrueTypeFonts 121 if(is_array($this->TTF_RANGE)) 122 { 123 if($this->debug) echo "\n<br />-Captcha-Debug: Check given TrueType-Array! (".count($this->TTF_RANGE).")"; 124 $temp = array(); 125 foreach($this->TTF_RANGE as $k=>$v) 126 { 127 if(is_readable($this->TTF_folder.$v)) $temp[] = $v; 128 } 129 $this->TTF_RANGE = $temp; 130 if($this->debug) echo "\n<br />-Captcha-Debug: Valid TrueType-files: (".count($this->TTF_RANGE).")"; 131 //if(count($this->TTF_RANGE) < 1) die('No Truetypefont available for the CaptchaClass.'); 132 } 133 else 134 { 135 if($this->debug) echo "\n<br />-Captcha-Debug: Check given TrueType-File! (".$this->TTF_RANGE.")"; 136 if(!is_readable($this->TTF_folder.$this->TTF_RANGE)) die('No Truetypefont available for the CaptchaClass.'); 137 } 138 139 // select first TrueTypeFont 140 $this->change_TTF(); 141 if($this->debug) echo "\n<br />-Captcha-Debug: Set current TrueType-File: (".$this->TTF_file.")"; 142 143 // get number of noise-chars for background if is enabled 144 $this->nb_noise = $this->noise ? ($this->chars * $this->noisefactor) : 0; 145 if($this->debug) echo "\n<br />-Captcha-Debug: Set number of noise characters to: (".$this->nb_noise.")"; 146 147 // set dimension of image 148 $this->lx = ($this->chars + 1) * (int)(($this->maxsize + $this->minsize) / 1.5); 149 $this->ly = (int)(2.4 * $this->maxsize); 150 if($this->debug) echo "\n<br />-Captcha-Debug: Set image dimension to: (".$this->lx." x ".$this->ly.")"; 151 } 152 153 function make_captcha( $private_key ) 154 { 155 if($this->debug) echo "\n<br />-Captcha-Debug: Generate private key: ($private_key)"; 156 157 // create Image and set the apropriate function depending on GD-Version & websafecolor-value 158 if($this->gd_version >= 2 && !$this->websafecolors) 159 { 160 $func1 = 'imagecreatetruecolor'; 161 $func2 = 'imagecolorallocate'; 162 } 163 else 164 { 165 $func1 = 'imageCreate'; 166 $func2 = 'imagecolorclosest'; 167 } 168 $image = $func1($this->lx,$this->ly); 169 if($this->debug) echo "\n<br />-Captcha-Debug: Generate ImageStream with: ($func1())"; 170 if($this->debug) echo "\n<br />-Captcha-Debug: For colordefinitions we use: ($func2())"; 171 172 173 // Set Backgroundcolor 174 $this->random_color(224, 255); 175 $back = @imagecolorallocate($image, $this->r, $this->g, $this->b); 176 @ImageFilledRectangle($image,0,0,$this->lx,$this->ly,$back); 177 if($this->debug) echo "\n<br />-Captcha-Debug: We allocate one color for Background: (".$this->r."-".$this->g."-".$this->b.")"; 178 179 // allocates the 216 websafe color palette to the image 180 if($this->gd_version < 2 || $this->websafecolors) $this->makeWebsafeColors($image); 181 182 183 // fill with noise or grid 184 if($this->nb_noise > 0) 185 { 186 // random characters in background with random position, angle, color 187 if($this->debug) echo "\n<br />-Captcha-Debug: Fill background with noise: (".$this->nb_noise.")"; 188 for($i=0; $i < $this->nb_noise; $i++) 189 { 190 srand((double)microtime()*1000000); 191 $size = intval(rand((int)($this->minsize / 2.3), (int)($this->maxsize / 1.7))); 192 srand((double)microtime()*1000000); 193 $angle = intval(rand(0, 360)); 194 srand((double)microtime()*1000000); 195 $x = intval(rand(0, $this->lx)); 196 srand((double)microtime()*1000000); 197 $y = intval(rand(0, (int)($this->ly - ($size / 5)))); 198 $this->random_color(160, 224); 199 $color = $func2($image, $this->r, $this->g, $this->b); 200 srand((double)microtime()*1000000); 201 $text = chr(intval(rand(45,250))); 202 if(count ($this->TTF_RANGE)>0){ 203 @ImageTTFText($image, $size, $angle, $x, $y, $color, $this->change_TTF(), $text); 204 } else { 205 imagestring($image,5,$x,$y,$text,$color); 206 } 207 } 208 } 209 else 210 { 211 // generate grid 212 if($this->debug) echo "\n<br />-Captcha-Debug: Fill background with x-gridlines: (".(int)($this->lx / (int)($this->minsize / 1.5)).")"; 213 for($i=0; $i < $this->lx; $i += (int)($this->minsize / 1.5)) 214 { 215 $this->random_color(160, 224); 216 $color = $func2($image, $this->r, $this->g, $this->b); 217 @imageline($image, $i, 0, $i, $this->ly, $color); 218 } 219 if($this->debug) echo "\n<br />-Captcha-Debug: Fill background with y-gridlines: (".(int)($this->ly / (int)(($this->minsize / 1.8))).")"; 220 for($i=0 ; $i < $this->ly; $i += (int)($this->minsize / 1.8)) 221 { 222 $this->random_color(160, 224); 223 $color = $func2($image, $this->r, $this->g, $this->b); 224 @imageline($image, 0, $i, $this->lx, $i, $color); 225 } 226 } 227 228 // generate Text 229 if($this->debug) echo "\n<br />-Captcha-Debug: Fill forground with chars and shadows: (".$this->chars.")"; 230 for($i=0, $x = intval(rand($this->minsize,$this->maxsize)); $i < $this->chars; $i++) 231 { 232 $text = strtoupper(substr($private_key, $i, 1)); 233 srand((double)microtime()*1000000); 234 $angle = intval(rand(($this->maxrotation * -1), $this->maxrotation)); 235 srand((double)microtime()*1000000); 236 $size = intval(rand($this->minsize, $this->maxsize)); 237 srand((double)microtime()*1000000); 238 $y = intval(rand((int)($size * 1.5), (int)($this->ly - ($size / 7)))); 239 $this->random_color(0, 127); 240 $color = $func2($image, $this->r, $this->g, $this->b); 241 $this->random_color(0, 127); 242 $shadow = $func2($image, $this->r + 127, $this->g + 127, $this->b + 127); 243 if(count($this->TTF_RANGE) > 0){ 244 @ImageTTFText($image, $size, $angle, $x + (int)($size / 15), $y, $shadow, $this->change_TTF(), $text); 245 @ImageTTFText($image, $size, $angle, $x, $y - (int)($size / 15), $color, $this->TTF_file, $text); 246 } else { 247 $t_font = rand(3,5); 248 imagestring($image,$t_font,$x + (int)($size / 15),$y-20,$text,$color); 249 imagestring($image,$t_font,$x,$y - (int)($size / 15)-20,$text,$color); 250 } 251 $x += (int)($size + ($this->minsize / 5)); 252 } 253 header('Content-type: image/jpeg'); 254 @ImageJPEG($image, '', $this->jpegquality); 255 @ImageDestroy($image); 256 if($this->debug) echo "\n<br />-Captcha-Debug: Destroy Imagestream."; 257 } 258 259 /** @private **/ 260 function makeWebsafeColors(&$image) 261 { 262 for($r = 0; $r <= 255; $r += 51) 263 { 264 for($g = 0; $g <= 255; $g += 51) 265 { 266 for($b = 0; $b <= 255; $b += 51) 267 { 268 $color = imagecolorallocate($image, $r, $g, $b); 269 //$a[$color] = array('r'=>$r,'g'=>$g,'b'=>$b); 270 } 271 } 272 } 273 if($this->debug) echo "\n<br />-Captcha-Debug: Allocate 216 websafe colors to image: (".imagecolorstotal($image).")"; 274 } 275 276 function random_color($min,$max) 277 { 278 srand((double)microtime() * 1000000); 279 $this->r = intval(rand($min,$max)); 280 srand((double)microtime() * 1000000); 281 $this->g = intval(rand($min,$max)); 282 srand((double)microtime() * 1000000); 283 $this->b = intval(rand($min,$max)); 284 } 285 286 function change_TTF() 287 { 288 if(count($this->TTF_RANGE) > 0){ 289 if(is_array($this->TTF_RANGE)) 290 { 291 srand((float)microtime() * 10000000); 292 $key = array_rand($this->TTF_RANGE); 293 $this->TTF_file = $this->TTF_folder.$this->TTF_RANGE[$key]; 294 } 295 else 296 { 297 $this->TTF_file = $this->TTF_folder.$this->TTF_RANGE; 298 } 299 return $this->TTF_file; 300 } 301 } 302 303 } // END CLASS masc_captcha 304 305 ?>
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| Généré le : Thu Nov 29 09:42:17 2007 | par Balluche grâce à PHPXref 0.7 |
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