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Annotation of botnow/captcha.png, Revision 1.1.1.1

1.1       bountyht    1: <?php
                      2:
                      3: $hash = explode("/", $_SERVER["REQUEST_URI"])[1];
                      4: $fpr{"hash"} = $hash;
                      5: $fpr{"remoteaddr"} = $_SERVER['REMOTE_ADDR'];
                      6: $fpr{"httpxforwarded"} = $_SERVER['HTTP_X_FORWARDED_FOR'];
                      7: $fpr{"time"} = date("Y-m-d H:i:s");
                      8: foreach (getallheaders() as $key => $value) {
                      9:        if ($key == "User-Agent") {
                     10:                $fpr{"useragent"} = $value;
                     11:        } elseif ($key == "Upgrade-Insecure-Requests") {
                     12:                $fpr{"upgradeinsecure"} = $value;
                     13:        } elseif ($key == "Host") {
                     14:                $fpr{"host"} = $value;
                     15:        } elseif ($key == "Dnt") {
                     16:                $fpr{"dnt"} = $value;
                     17:        } elseif ($key == "Connection") {
                     18:                $fpr{"connection"} = $value;
                     19:        } elseif ($key == "Cache-Control") {
                     20:                $fpr{"cachecontrol"} = $value;
                     21:        } elseif ($key == "Accept-Language") {
                     22:                $fpr{"acceptlanguage"} = $value;
                     23:        } elseif ($key == "Accept-Encoding") {
                     24:                $fpr{"acceptencoding"} = $value;
                     25:        } elseif ($key == "Accept") {
                     26:                $fpr{"accept"} = $value;
                     27:        }
                     28: }
                     29:
                     30: class wwwdb extends SQLite3 {
                     31:        function __construct() {
                     32:                $this->open('/botnow/botnow.db');
                     33:        }
                     34: }
                     35: $wwwdb = new wwwdb();
                     36: if(!$wwwdb) {
                     37:        echo $wwwdb->lastErrorMsg();
                     38: } else {
                     39:        foreach ($fpr as $key => $value) {
                     40:                $keys[] = $key;
                     41:                $values[] = $value;
                     42:        }
                     43:        $keystr = '"'.implode('","', $keys).'"';
                     44:        $valstr = '"'.implode('","', $values).'"';
                     45:        $sql =<<<EOF
                     46: INSERT INTO www ($keystr)
                     47: VALUES ($valstr);
                     48: EOF;
                     49:
                     50:        if (!$wwwdb->exec($sql)) {
                     51:                echo $db->lastErrorMsg();
                     52:                return;
                     53:        }
                     54:
                     55:        $sql =<<<EOF
                     56: SELECT * from bnc;
                     57: EOF;
                     58:        $ret = $wwwdb->query($sql);
                     59:        while($row = $ret->fetchArray(SQLITE3_ASSOC)) {
                     60: //             echo "hash: $hash, row['hashid']: ".$row['hashid']."<br>\n";
                     61:                if ($hash == $row['hashid']) {
                     62:                        $captcha = $row['captcha'];
                     63: //                     echo $captcha;
                     64:                }
                     65:        }
                     66:        $wwwdb->close();
                     67: //             echo "Records created successfully\n";
                     68: }
                     69: session_start();
                     70:
                     71: // The capcha will be stored
                     72: // for the session
                     73: $_SESSION["captcha"] = $captcha;
                     74:
                     75: // Generate a 50x24 standard captcha image
                     76: $im = imagecreatetruecolor(250, 120);
                     77:
                     78: // Blue color
                     79: $bg = imagecolorallocate($im, 22, 86, 165);
                     80:
                     81: // White color
                     82: $fg = imagecolorallocate($im, 255, 255, 255);
                     83:
                     84: // Give the image a blue background
                     85: imagefill($im, 0, 0, $bg);
                     86:
                     87: // Print the captcha text in the image
                     88: // with random position & size
                     89: //imagestring($im, 5, rand(1, 40), rand(1, 40),  $captcha, $fg);
                     90: imagettftext($im , 96, 0, rand(0,130), 120-rand(0,60), $fg , 'intuitive.ttf', $captcha);
                     91: //imagettftext($im , 96, 0, rand(20, 50), rand(20, 50), $fg , 'eczar.ttf', $captcha);
                     92:
                     93: // VERY IMPORTANT: Prevent any Browser Cache!!
                     94: header("Cache-Control: no-store,
                     95:             no-cache, must-revalidate");
                     96:
                     97: // The PHP-file will be rendered as image
                     98: header('Content-type: image/png');
                     99:
                    100: // Finally output the captcha as
                    101: // PNG image the browser
                    102: imagepng($im);
                    103:
                    104: // Free memory
                    105: imagedestroy($im);
                    106: ?>