<?php // Wiem, ze ten kod to czysta ohyda. Coz. require_once("inc/functions.php"); require_once("inc/ic-encrypt.php"); global $config; function getImages() { global $config; $lines = explode("\n",file_get_contents($config["imgcaptcha_list"])); for($i=0;$i<count($lines);$i++) { $lines[$i] = explode(",",$lines[$i]); } return $lines; } function getIPath($img) { global $config; return $config["imgcaptcha_images"] . "/" . $img; } function pickImage($lines) { $src = FALSE; while($src == FALSE) { $pick = rand(0,count($lines)-1); if($lines[$pick][0] != "") $src = imagecreatefrompng(getIPath($lines[$pick][0])); } imagedestroy($src); return $pick; } function ncfix($a) { if($a>255) { return 255; } if($a<0) { return 0; } return $a; } function randString($length, $charset='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+=') { $str = ''; $count = strlen($charset); while ($length--) { $str .= $charset[rand(0, $count-1)]; } return $str; } function generateCaptchaHash() { global $config; $lines = getImages(); $pick = pickImage($lines); $enctext = $pick . ",," . time() . ",," . $_SERVER["REMOTE_ADDR"] . ",," . randString(12); $converter = new Encryption; return $converter->encode($config["imgcaptcha_key"],$enctext); } function ic_verifyHash($enctext, $output) { global $config; //print "VERIFY: " . $enctext . " " . $output . "<br>"; $converter = new Encryption; $dectext = explode(",,",$converter->decode($config["imgcaptcha_key"],$enctext)); if(count($dectext)<4) return true; $lines = getImages(); $pick = $dectext[0]; $time = time()-$dectext[1]; if($time>$config["imgcaptcha_time_limit"]) return true; $lp = $lines[$pick]; for($i=1;$i<count($lp);$i++) { if(strcasecmp($lp[$i],$output)==0) return false; } return true; } function getPick($enctext) { global $config; $converter = new Encryption; $dectext = explode(",,",$converter->decode($config["imgcaptcha_key"],$enctext)); if(count($dectext)<=1) return; //SC $lines = getImages(); return $dectext[0]; } function generateImage($enctext) { global $config; $lines = getImages(); $pick = getPick($enctext); if(!isset($lines[$pick])) return; //SC $src = imagecreatefrompng(getIPath($lines[$pick][0])); if($src == FALSE) return; //SC $maxc = 8; $icw = $config["imgcaptcha_width"]; $ich = $config["imgcaptcha_height"]; $dst = imagecreatetruecolor($icw,$ich); $srcxm = imagesx($src)-$icw; $srcym = imagesy($src)-$ich; $srcx = rand(0,$srcxm-1); $srcy = rand(0,$srcym-1); imagecopy($dst,$src,0,0,$srcx,$srcy,$icw,$ich); // Obfuscation step 1 imagecopymergegray($dst,$dst,0,0,0,0,$icw,$ich,rand(20,45)); // Obfuscation step 1.5 for($i=0;$i<8;$i++) { $w = rand(5,10); $h = rand(5,10); $x = rand(0,$icw-1-$w); $y = rand(0,$ich-1-$h); $x2 = rand(0,$icw-1); $y2 = rand(0,$ich-1); imagefilledrectangle($dst,$x,$y,$x+$w,$y+$h,imagecolorat($dst,$x2,$y2)); } for($i=0;$i<5;$i++) { $w = rand(20,40); $h = rand(20,40); $x = rand(0,$icw-1-$w); $y = rand(0,$ich-1-$h); imagecopymergegray($dst,$dst,$x,$y,$x,$y,$w,$h,0); } // Obfuscation step 2 for($i=0;$i<$icw*$ich;$i++) { $x = $i%$icw; $y = $i/$icw; $c = imagecolorat($dst,$x,$y); if(rand(0,4) == 2) { $nc = $c ^ rand(0,16777215); } else { $nc = imagecolorat($dst,rand(0,$icw-1),rand(0,$ich-1)); } if(rand(18,24)!=21 and $c != 0 and $c != 0xFF00FF) { $nc = ncfix(($c&0xFF) + rand(-16,16)) | ncfix((($c>>8)&0xFF) + rand(-8,8))<<8 | ncfix((($c>>16)&0xFF) + rand(-32,32))<<16; $nc1 = $nc&0xFF ^ ($nc>>8)&0xFF ^ ($nc>>16)&0xFF; } else { $nc1 = $nc&0xFF; if($nc1>($maxc*25)) $nc1 = $nc % ($maxc*25); } $nc2 = $nc1 | $nc1<<8 | $nc1<<16; if(rand(0,1)==0) $nc2=$nc; imagesetpixel($dst,$x,$y,$nc2); } // Obfuscation step 3 for($i=0;$i<rand(10,30);$i++) { $x1 = rand(0,$icw-1); $x2 = rand(0,$icw-1); $y1 = rand(0,$ich-1); $y2 = rand(0,$ich-1); $color = imagecolorallocate($dst, rand(0,$maxc)*25, rand(0,$maxc)*25, rand(0,$maxc)*25); imageline($dst,$x1,$y1,$x2,$y2,$color); } imagepng($dst); } //header('Content-Type: image/png'); //$t = generateCaptchaHash(); //generateImage($t); ?>