<?php
//=======================================================================
// File:        JPGRAPH_ANTISPAM.PHP
// Description: Genarate anti-spam challenge
// Created:     2004-10-07
// Ver:         $Id: jpgraph_antispam-digits.php 1930 2010-01-22 20:19:27Z ljp $
//
// Copyright (c) Asial Corporation. All rights reserved.
//========================================================================

class HandDigits
{
    public $digits  = array();
    public $iHeight = 30;
    public $iWidth  = 30;

    public function __construct()
    {
        //==========================================================
        // d6-small.jpg
        //==========================================================
        $this->digits['6'][0] = 645;
        $this->digits['6'][1] =
        '/9j/4AAQSkZJRgABAQEASgBKAAD//gAJSnBHcmFwaP/bAEMACAYGBwYFCAcHBwkJCAoMFA0MCwsMGRITDxQdGh8eHRocHCAkLicg' .
        'IiwjHBwoNyksMDE0NDQfJzk9ODI8LjM0Mv/bAEMBCQkJDAsMGA0NGDIhHCEyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIy' .
        'MjIyMjIyMjIyMjIyMjIyMjIyMv/AABEIAB4AEgMBIgACEQEDEQH/xAAZAAEBAAMBAAAAAAAAAAAAAAAABgMEBwX/xAAvEAABAwMC' .
        'BAQEBwAAAAAAAAABAgMEAAURBiESIjFRBxMUQRUWMmFTYnGRkrHC/8QAFgEBAQEAAAAAAAAAAAAAAAAAAAEC/8QAFhEBAQEAAAAA' .
        'AAAAAAAAAAAAAAER/9oADAMBAAIRAxEAPwDslwiR3oDku8ONttsAvDiVyMcO/ET7ke5/aoOz6k1Vr5htNjW7a7M1yO3NTQU9JUDu' .
        'GgrlSn8xyf6p4gXaHJvNps9/mKZtSkGdMjRwpfqAFBLLACRlZUrJONsI2717No1lbZ10kx7XGnRpKWQ/6GVGMfzEJ5VFIVtsOH6e' .
        'wyKVhYsia0y22pLThSkJK1uniVgdThOM0ol+StIUhpopIyCFq3H8aUVCwnG3PGe4Rp6fLXJtMdyM0ojcIWvIz3HFnAPfrWTXb6GN' .
        'WaLXDwZjVz8pKEfhuIUFg/bAz9sVJ61nt61mxJFslLtq7e5yPqiBT4UDklKw4MDpt+u+9bFiu9riXNu83R+fcr6tohuQ5HQhmK37' .
        'paaC8DruScmg6X8KkjZEhbaB9KEyFYSOw26Uqd+e7Qerl5z74DY/1SomP//Z';

        //==========================================================
        // d2-small.jpg
        //==========================================================
        $this->digits['2'][0] = 606;
        $this->digits['2'][1] =
        '/9j/4AAQSkZJRgABAQEASgBKAAD//gAJSnBHcmFwaP/bAEMACAYGBwYFCAcHBwkJCAoMFA0MCwsMGRITDxQdGh8eHRocHCAkLicg' .
        'IiwjHBwoNyksMDE0NDQfJzk9ODI8LjM0Mv/bAEMBCQkJDAsMGA0NGDIhHCEyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIy' .
        'MjIyMjIyMjIyMjIyMjIyMjIyMv/AABEIAB4AEQMBIgACEQEDEQH/xAAYAAEBAQEBAAAAAAAAAAAAAAAFAAQHAv/EACsQAAEDBAEC' .
        'BAYDAAAAAAAAAAIBAwQABQYRIRIxQVFhcQcTFSJSU5GU0f/EABcBAAMBAAAAAAAAAAAAAAAAAAECAwT/xAAZEQACAwEAAAAAAAAA' .
        'AAAAAAAAARESUUH/2gAMAwEAAhEDEQA/AOqXm/Q8dxmOL4PPSnCSNFixx6nXnkXgRT3Te17JWbGsveueSyLZdbPItNxOKLzTLjou' .
        'gYCSoSoY8ISKSbFeUrzkdlnTL1YshskiErkQnFEZaF8kkdBBVdjyi6RNL5+9F486eS/ECVkcBtDt1vZcho5viS8ZCp9C9tAIAm/F' .
        'VoPRU+HRtJ5JVRP1kP0PfwP+1VKrHBMliXG4Nw8VgE4xGkuqk2S1wTUNEVdIvgpL9iL6KtNxY7WOwo9tt0RCitj0sR2uCbFPPzH1' .
        '7+6rRuSRcljMBMsUy2tky045KOawZk5xtEFBJEROO3hx61kh2rPCIX3MhsyC4QmfTbC6lH8dq5212qwkiG5H6Y/9R2qm+ofxqqsL' .
        'DLZ6f//Z';

        //==========================================================
        // d9-small.jpg
        //==========================================================
        $this->digits['9'][0] = 680;
        $this->digits['9'][1] =
        '/9j/4AAQSkZJRgABAQEASgBKAAD//gAJSnBHcmFwaP/bAEMACAYGBwYFCAcHBwkJCAoMFA0MCwsMGRITDxQdGh8eHRocHCAkLicg' .
        'IiwjHBwoNyksMDE0NDQfJzk9ODI8LjM0Mv/bAEMBCQkJDAsMGA0NGDIhHCEyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIy' .
        'MjIyMjIyMjIyMjIyMjIyMjIyMv/AABEIAB4AEgMBIgACEQEDEQH/xAAZAAACAwEAAAAAAAAAAAAAAAAABAUGBwP/xAArEAABAwMD' .
        'AgYBBQAAAAAAAAABAgMEBQYRABIhE1EUIjEzQUIHMlJhcdH/xAAWAQEBAQAAAAAAAAAAAAAAAAACAQD/xAAYEQEAAwEAAAAAAAAA' .
        'AAAAAAAAAREhQf/aAAwDAQACEQMRAD8AkK7brF6X7XpMeGoKhFMLEeT4ZUheEhanF4OcZ2pTgDykk92bZpdCsi7aezLjxkIPUZiV' .
        'RSCy8hah7EkZ27yM7V+iscal5bE22Lon1qNDmSKROd8Sl+Ix1lMOlIS4HGgQpbStoUCnlJz8HmsXtW3Lst2rmBAelLMRRekOwnYz' .
        'Edls9QKKnOVLyk7UgcbzzrdBthqEJJwZbAI4x1U/7o1TaFa9lG36aXaZTy54VrcXUgrzsGdx+T30aNydweqVw1GS87T6Lb86Q4ha' .
        'my/IAYjZBx+snKk99oOQMf1AViE65SY348hzFy6hPKnqtKz7DC1lbqyPrvJKUJ7H+M6Wrt3InP7o1brFNp4bCDGhxGAsqz69VSiQ' .
        'ORwBxrrQ7itm1ac7Hp0WoGTIc3PSn0pccdcP2WorycfA1RaRHjxosZqOyhtDTSAhCf2gDAGjVHTd9sKSCumynFEZK1tIJUe58/ro' .
        '1V1//9k=';

        //==========================================================
        // d5-small.jpg
        //==========================================================
        $this->digits['5'][0] = 632;
        $this->digits['5'][1] =
        '/9j/4AAQSkZJRgABAQEASgBKAAD//gAJSnBHcmFwaP/bAEMACAYGBwYFCAcHBwkJCAoMFA0MCwsMGRITDxQdGh8eHRocHCAkLicg' .
        'IiwjHBwoNyksMDE0NDQfJzk9ODI8LjM0Mv/bAEMBCQkJDAsMGA0NGDIhHCEyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIy' .
        'MjIyMjIyMjIyMjIyMjIyMjIyMv/AABEIAB4AEgMBIgACEQEDEQH/xAAZAAACAwEAAAAAAAAAAAAAAAAABgIFBwT/xAAoEAABAwME' .
        'AQQCAwAAAAAAAAABAgMEBQYRABIhIkEUMVFhBxNCgaH/xAAVAQEBAAAAAAAAAAAAAAAAAAAAAv/EABcRAQEBAQAAAAAAAAAAAAAA' .
        'AAABEUH/2gAMAwEAAhEDEQA/ANGvW4YVOeiRX5b4mv5Sin05IdlupPKdo/j2SO3+6TbPNQvOsTVz33KRT4csR3YUF7Dsh5OSFvug' .
        'kqG4FPBxnjxpvvi4KZb1pTpU+QwxUi2Y7ZIAefUk5ATxnB9/gbtL/wCH1UpuhPUlZlMVaQ0mS8zJjqZOPfc2TwpIUonI9tw40R1r' .
        'WNGq/wBdJR1XT3lqHBUnGCfkfWjRWs1ve249erQqQYjOtN1FqPUpCXQ4WIzQSsJwT0UpRwQPG0nzqyuNHobjsl9kBuWqoOoXtT1/' .
        'WppZcA8lKRj64HxqU+3KpAr6plElRVKef3S4E0K9O8pLXVzKcqSsJAB9wSAca6bSoNXeuA1+5pEV+SGFNU1iKVFqI0Vdx2AJUeoz' .
        '8DGlTDwG3CAf3q/pI0ah6MDhLz6U+EpXwPoaNMU//9k=';

        //==========================================================
        // d1-small.jpg
        //==========================================================
        $this->digits['1'][0] = 646;
        $this->digits['1'][1] =
        '/9j/4AAQSkZJRgABAQEASgBKAAD//gAJSnBHcmFwaP/bAEMACAYGBwYFCAcHBwkJCAoMFA0MCwsMGRITDxQdGh8eHRocHCAkLicg' .
        'IiwjHBwoNyksMDE0NDQfJzk9ODI8LjM0Mv/bAEMBCQkJDAsMGA0NGDIhHCEyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIy' .
        'MjIyMjIyMjIyMjIyMjIyMjIyMv/AABEIAB4AEwMBIgACEQEDEQH/xAAZAAADAAMAAAAAAAAAAAAAAAAABQYCBAf/xAApEAACAQMD' .
        'AwQBBQAAAAAAAAABAgMEBREABiESMUEHEyJRkSNCYXGB/8QAFgEBAQEAAAAAAAAAAAAAAAAAAAEC/8QAFxEBAQEBAAAAAAAAAAAA' .
        'AAAAAAEREv/aAAwDAQACEQMRAD8A6jdd4WLbstILnc4Uq0VoWpkJknb6IjXLHJUePOlez923fcW4r1SxWlqC2UbdKirQif3Xw3yA' .
        'OFAGT09/kO3OmV3a20MFRf6lIYPcpy7yRRAzgxjIy2M8YwcdiBzpX6d22VNvUlTXsFkuwkrKqNSfnK7F8OTzwrAY+l5zoxKskudN' .
        'EgQPUT9PBkWF3DH+1GPxo1mLnRoAqF2VRgGOFmX/AAgY/GjRUP6hVMFv2FuFqUvUGrpDFJMBnpdyF5bsAQew7Hxzp6LZNT0yQ1DI' .
        'wp0QCFBhD0jCsfLZHxbx5xxpTuvb1+v9PV7Ztk9roLPLCjmSSN3mX5ZwqjCgZX7PfWxDQb2in96pv9qq46aTE0bW4x9ceAWAYPwS' .
        'PsYzoixgmheBGjIVcYCnjp/jHjHbRpe1JLn9OnopE/a0ykvjwDx47aNMXqP/2Q==';

        //==========================================================
        // d8-small.jpg
        //==========================================================
        $this->digits['8'][0] = 694;
        $this->digits['8'][1] =
        '/9j/4AAQSkZJRgABAQEASgBKAAD//gAJSnBHcmFwaP/bAEMACAYGBwYFCAcHBwkJCAoMFA0MCwsMGRITDxQdGh8eHRocHCAkLicg' .
        'IiwjHBwoNyksMDE0NDQfJzk9ODI8LjM0Mv/bAEMBCQkJDAsMGA0NGDIhHCEyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIy' .
        'MjIyMjIyMjIyMjIyMjIyMjIyMv/AABEIAB4AFQMBIgACEQEDEQH/xAAYAAADAQEAAAAAAAAAAAAAAAAABgcEBf/EACsQAAEDAwMD' .
        'AwMFAAAAAAAAAAECAwQFBhEAEiEUMVEHE0EVYYEiIzJCsf/EABYBAQEBAAAAAAAAAAAAAAAAAAIAAf/EABcRAQEBAQAAAAAAAAAA' .
        'AAAAAAABERL/2gAMAwEAAhEDEQA/AKL6gVVUa0i1T5QjvTprUJMlxW4R9zgQXe/AH+kaWrntqlWjaq7gpcmotXAw82ht9yY4tch8' .
        'uAFC0k7VBXPGMY51ruiaue+bThIj+7NbWqS+7HDxajFf6AlB/k44o8ZOABk4xkL0X0tZiojKrlRuGRJjugqldSlKGf6t7BuUQe3J' .
        '44xxxrA1a4KVJipLidri8uLHgqOcfjOPxo0o2hdDvS1CmV2Yl6fS5ioipIQR1CAlKkLKR2UUqAI8g6NRSwuuyHab6s1ufLI/Zai7' .
        'UBJOxhTS0+6B32pWSFH4CidOdWU0ukLiN1BLr0zG5Sdm3GRvcPhIT858DvjXNrVsSLnm/VIdTXS6tTnFsxZTSN3jchaTwps+O/z9' .
        'tcBVq3hIX0tYqlIiQHdy5CqRHKHXEjAOMgBKjnvyRk4xrQa7OiGt1K5biYZL8SoVEpjOqkFsONtJCNwASeCQrn7aNUKnQYtLp7EC' .
        'EylmLHQltptPZKQOBo1FzH//2Q==';

        //==========================================================
        // d4-small.jpg
        //==========================================================
        $this->digits['4'][0] = 643;
        $this->digits['4'][1] =
        '/9j/4AAQSkZJRgABAQEASgBKAAD//gAJSnBHcmFwaP/bAEMACAYGBwYFCAcHBwkJCAoMFA0MCwsMGRITDxQdGh8eHRocHCAkLicg' .
        'IiwjHBwoNyksMDE0NDQfJzk9ODI8LjM0Mv/bAEMBCQkJDAsMGA0NGDIhHCEyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIy' .
        'MjIyMjIyMjIyMjIyMjIyMjIyMv/AABEIAB4AEgMBIgACEQEDEQH/xAAYAAADAQEAAAAAAAAAAAAAAAAABAYHAv/EAC0QAAIBAwQA' .
        'BAMJAAAAAAAAAAECAwQFEQAGEiETFDFBUmGBByIjUVNxobHR/8QAFgEBAQEAAAAAAAAAAAAAAAAAAAIB/8QAGBEBAAMBAAAAAAAA' .
        'AAAAAAAAAAERIVH/2gAMAwEAAhEDEQA/ANjM00Nxmt1xiWW31CZp5uJwoAAaOQ/n7qfcZHqO5my3q5XX7R6ijiqnNut9u4NyJ4yv' .
        'JJyjYr8Xhrn5g599J7x3ulBNU7Zo7dXXXcLQ8kURYi4epYtkALjOePv1nUvbLvV7P3BZm3DR3eh88Kp7pVzBZI6iUhGWRRGWwE44' .
        'HX3V+uiL1uHgt+vL/H+aNJQ3CSeCOaFqSaJ1DJKs/TqRkMOvQjvRorHE4pRDLNWLGlRHGUeYIORXs9e5B7OP31E0fmdyb/t0DJ4Q' .
        '27bfx3YZzPUIoAAz7IpOD6cuxq0uNumqLfVNDOqXBoZEjnZcqhIPXH4c46+WkdoWOltu3IDDLLLVVR83UVcuPEmmcZZ2/rHoAANG' .
        'GI7KIY1ijoLeEQBVCwIoAHpgY6Hy0aZe7mJ2jeHLKcEhusj6aNKgzr//2Q==';

        //==========================================================
        // d7-small.jpg
        //==========================================================
        $this->digits['7'][0] = 658;
        $this->digits['7'][1] =
        '/9j/4AAQSkZJRgABAQEASgBKAAD//gAJSnBHcmFwaP/bAEMACAYGBwYFCAcHBwkJCAoMFA0MCwsMGRITDxQdGh8eHRocHCAkLicg' .
        'IiwjHBwoNyksMDE0NDQfJzk9ODI8LjM0Mv/bAEMBCQkJDAsMGA0NGDIhHCEyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIy' .
        'MjIyMjIyMjIyMjIyMjIyMjIyMv/AABEIAB4AEgMBIgACEQEDEQH/xAAZAAACAwEAAAAAAAAAAAAAAAAABgEFBwT/xAAuEAABAwIE' .
        'BAQGAwAAAAAAAAABAgMEBREABiExEhMiQSMyUXEHFBclVJFhk9L/xAAXAQADAQAAAAAAAAAAAAAAAAAAAQID/8QAGREBAQEAAwAA' .
        'AAAAAAAAAAAAAAEREiFR/9oADAMBAAIRAxEAPwDXq9mCjZeQ05VZ5ZST4bfEpa3VdglCbqUe+g9MZ5Uq7V8415WXoMSdQ6etgSps' .
        '19wpkCMDZKUpv0FZvbi1NzpYasMDLDUbMVXrtQdbeeU23xLWkj5RlLYK0J7anW9gbAjCzkOtsVSUJUdtc6dVZK51UeaFm4LKbhpC' .
        'l7EhIFkDW974GbRI2XorUVls1OTdKAOqUpR0Hc3198GITQ6k+hLwrEpoODiDenRfW23bBicg78JXxPpD0mgVOW5PAivNNpahsPW5' .
        '8xxQaSVkboQnhsnYm5OHqDGp1IpsalMKjMsMIC3+XZKbJFth62/QOEfMOZqZXp9JcKZTcGmTky3meSi7xQklI81vMR+sXIz/AEgp' .
        'Q0qPNu6ea8Q2jqtbp8+2w9h/OKORc/cpHjt1dDSHOtLZ4ekHW23bBjj+o9H/AB539aP94MG0+L//2Q==';

        //==========================================================
        // d3-small.jpg
        //==========================================================
        $this->digits['3'][0] = 662;
        $this->digits['3'][1] =
        '/9j/4AAQSkZJRgABAQEASgBKAAD//gAJSnBHcmFwaP/bAEMACAYGBwYFCAcHBwkJCAoMFA0MCwsMGRITDxQdGh8eHRocHCAkLicg' .
        'IiwjHBwoNyksMDE0NDQfJzk9ODI8LjM0Mv/bAEMBCQkJDAsMGA0NGDIhHCEyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIy' .
        'MjIyMjIyMjIyMjIyMjIyMjIyMv/AABEIAB4AEgMBIgACEQEDEQH/xAAZAAACAwEAAAAAAAAAAAAAAAAABAUGBwL/xAArEAABBAED' .
        'AwMDBQEAAAAAAAABAgMEBREABhIhMUEiMmETFZEHFkJDUdH/xAAWAQEBAQAAAAAAAAAAAAAAAAABAAL/xAAYEQEBAQEBAAAAAAAA' .
        'AAAAAAAAEQExQf/aAAwDAQACEQMRAD8A0vclruBdk3VVLLUNssGRJsZSCtqOjlgJAHvcOD6c4HnOdIbcttw1W5P29cFEhuawqTXS' .
        'VsJjnCMBxKkJJx7goAde+ceJfdNxU0UNlyymyXHi6kxWUNl1S3EnkAEIHX2nv86qtTuZr9Q9+1VhRsOoYpYcgSVyAE/TdewkJxnK' .
        'sBCjkdPGpnOtFMd3PqsXgfOAgD8Y0aX+11H9rDDjn8lr9yj5J+dGqsqxaw6Cc9cQZU4Sp7zTJsIrKlcUEKwhSin1JABI45GUjqOu' .
        'lbOvjbc3Ts9ynjGCy445UuFLYRzbWgrT6fhSCQSMDke+pew2zYVly/d7YchNqkMJZnQpgV9J8IzwWFJyUrAJHYgjvpLbu37G5nR7' .
        'vck5C3YRKYEOEVJZj8kjKypXqWvirjk9h+dB9i4faa89TDZUfKlIyT8k+To10a6KTkpcJ/0vL/7o0TS//9k=';
    }
}

class AntiSpam
{
    private $iNumber = '';

    public function __construct($aNumber = '')
    {
        $this->iNumber = $aNumber;
    }

    public function Rand($aLen)
    {
        $d = '';
        for ($i = 0; $i < $aLen; ++$i) {
            $d .= rand(1, 9);
        }
        $this->iNumber = $d;
        return $d;
    }

    public function Stroke()
    {
        $n = strlen($this->iNumber);
        for ($i = 0; $i < $n; ++$i) {
            if (!is_numeric($this->iNumber[$i]) || $this->iNumber[$i] == 0) {
                return false;
            }
        }

        $dd  = new HandDigits();
        $n   = strlen($this->iNumber);
        $img = @imagecreatetruecolor($n * $dd->iWidth, $dd->iHeight);
        if ($img < 1) {
            return false;
        }
        $start = 0;
        for ($i = 0; $i < $n; ++$i) {
            $size = $dd->digits[$this->iNumber[$i]][0];
            $dimg = imagecreatefromstring(base64_decode($dd->digits[$this->iNumber[$i]][1]));
            imagecopy($img, $dimg, $start, 0, 0, 0, imagesx($dimg), $dd->iHeight);
            $start += imagesx($dimg);
        }
        $resimg = @imagecreatetruecolor($start + 4, $dd->iHeight + 4);
        if ($resimg < 1) {
            return false;
        }
        imagecopy($resimg, $img, 2, 2, 0, 0, $start, $dd->iHeight);
        header("Content-type: image/jpeg");
        imagejpeg($resimg);
        return true;
    }
}
