PHP
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发表于 5年以前
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Ò»¡¢ÑeÖ¤ÂeʾÀý
¶þ¡¢phpÑeÖ¤ÂeÀa£¬secoder.class.php
<?php
/**
* °²È«ÑeÖ¤Âe
*
* °²È«µÄÑeÖ¤ÂeÒª£ºÑeÖ¤ÂeÎÄ×ÖŤÇu¡¢Ðýת£¬Ê¹Óò»Í¬×ÖÌa£¬Ìi¼Ó¸ÉÈÅÂe
*
* @author Á÷Ë®ÃÏ´º <cmpan(at)qq.com>
* @link http://labs.yulans.cn/YL_Security_Secoder
* @link http://wiki.yulans.cn/docs/yl/security/secoder
*/
class YL_Security_Secoder {
/**
* ÑeÖ¤ÂeµÄsessionµÄϱe
*
* @var string
*/
//public static $seKey = 'sid.sek ey.ylans.cn';
public static $seKey = 'sid';
public static $expire = 3000; // ÑeÖ¤Âe¹ýÆÚʱ¼a£¨s£(C)
/**
* ÑeÖ¤ÂeÖÐʹÓõÄ×Ö*u£¬01IOÈÝÒ×»iÏý£¬½¨Òe²»ÓÃ
*
* @var string
*/
public static $codeSet = '346789ABCDEFGHJKLMNPQRTUVWXY';
public static $fontSize = 25; // ÑeÖ¤Âe×ÖÌa´oС(px)
public static $useCurve = true; // ÊÇ*ñ»»iÏýÇuÏß
public static $useNoise = true; // ÊÇ*ñÌi¼ÓÔÓµa
public static $imageH = 0; // ÑeÖ¤ÂeͼƬ¿i
public static $imageL = 0; // ÑeÖ¤ÂeͼƬ³¤
public static $length = 4; // ÑeÖ¤ÂeλÊý
public static $bg = array(243, 251, 254); // ±³¾°
protected static $_image = null; // ÑeÖ¤ÂeͼƬʵÀý
protected static $_color = null; // ÑeÖ¤Âe×ÖÌaÑÕÉ«
/**
* Êa³oÑeÖ¤Âe²¢°ÑÑeÖ¤ÂeµÄÖµ±£´aeµÄsessionÖÐ
* ÑeÖ¤Âe±£´aeµ½sessionµÄ¸ñʽΪ£º $_SESSION[self::$seKey] = array('code' => 'ÑeÖ¤ÂeÖµ', 'time' => 'ÑeÖ¤Âe´´½¨Ê±¼a');
*/
public static function entry() {
// ͼƬ¿i(px)
self::$imageL || self::$imageL = self::$length * self::$fontSize * 1.5 + self::$fontSize*1.5;
// ͼƬ¸ß(px)
self::$imageH || self::$imageH = self::$fontSize * 2;
// ½¨Á¢Ò»*u self::$imageL x self::$imageH µÄͼÏñ
self::$_image = imagecreate(self::$imageL, self::$imageH);
// ÉeÖñ³¾°
imagecolorallocate(self::$_image, self::$bg[0], self::$bg[1], self::$bg[2]);
// ÑeÖ¤Âe×ÖÌaËae»uÑÕÉ«
self::$_color = imagecolorallocate(self::$_image, mt_rand(1,120), mt_rand(1,120), mt_rand(1,120));
// ÑeÖ¤ÂeʹÓÃËae»u×ÖÌa
//$ttf = dirname(__FILE__) . '/ttfs/' . mt_rand(1, 20) . '.ttf'; 4
$ttf = dirname(__FILE__) . '/ttfs/4.ttf';
if (self::$useNoise) {
// »aeÔÓµa
self::_writeNoise();
}
if (self::$useCurve) {
// »ae¸ÉÈÅÏß
self::_writeCurve();
}
// »aeÑeÖ¤Âe
$code = array(); // ÑeÖ¤Âe
$codeNX = 0; // ÑeÖ¤ÂeµÚN¸o×Ö*uµÄ×o±ß¾a
for ($i = 0; $i<self::$length; $i++) {
$code[$i] = self::$codeSet[mt_rand(0, 27)];
$codeNX += mt_rand(self::$fontSize*1.2, self::$fontSize*1.6);
// дһ¸oÑeÖ¤Âe×Ö*u
imagettftext(self::$_image, self::$fontSize, mt_rand(-40, 70), $codeNX, self::$fontSize*1.5, self::$_color, $ttf, $code[$i]);
}
// ±£´aeÑeÖ¤Âe
isset($_SESSION) || session_start();
$_SESSION[self::$seKey]['code'] = join('', $code); // °ÑУÑeÂe±£´aeµ½session
$_SESSION[self::$seKey]['time'] = time(); // ÑeÖ¤Âe´´½¨Ê±¼a
header('Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate');
header('Cache-Control: post-check=0, pre-check=0', false);
header('Pragma: no-cache');
header("content-type: image/png");
// Êa³oͼÏñ
imagepng(self::$_image);
imagedestroy(self::$_image);
}
/**
* »Ò»ÌoÓÉÁ½ÌoÁ¬ÔÚÒ»Æ𹹳ɵÄËae»uÕýÏÒº¯ÊýÇuÏß×÷¸ÉÈÅÏß(Äa¿ÉÒԸijɸu˧µÄÇuÏߺ¯Êý)
*
* ¸ßÖеÄÊýѧ¹«Ê½Õ¦¶¼ÍuÁËÄu£¬Ð´³oÀ´
* ÕýÏÒÐͺ¯Êý½aÎoʽ£ºy=Asin(¦Øx+¦Õ)+b
* ¸÷³£ÊýÖµ¶Ôº¯ÊýͼÏñµÄÓ°Ïi£º
* A£º¾o¶¨*aÖµ£¨¼´×ÝÏoÀÉiѹËoµÄ±¶Êý£(C)
* b£º±iʾ²¨ÐÎÔÚYÖaµÄλÖùØϵ»o×ÝÏoÒƶ¯¾aÀe£¨ÉϼÓϼo£(C)
* ¦Õ£º¾o¶¨²¨ÐÎÓeXÖaλÖùØϵ»oºaÏoÒƶ¯¾aÀe£¨×o¼ÓÓÒ¼o£(C)
* ¦Ø£º¾o¶¨ÖÜÆÚ£¨×iСÕýÖÜÆÚT=2¦Ð/¨O¦Ø¨O£(C)
*
*/
protected static function _writeCurve() {
$A = mt_rand(1, self::$imageH/2); // Õñ*u
$b = mt_rand(-self::$imageH/4, self::$imageH/4); // YÖa*½ÏoÆ«ÒÆÁ¿
$f = mt_rand(-self::$imageH/4, self::$imageH/4); // XÖa*½ÏoÆ«ÒÆÁ¿
$T = mt_rand(self::$imageH*1.5, self::$imageL*2); // ÖÜÆÚ
$w = (2* M_PI)/$T;
$px1 = 0; // ÇuÏߺa×ø±eÆðʼλÖÃ
$px2 = mt_rand(self::$imageL/2, self::$imageL * 0.667); // ÇuÏߺa×ø±e½aÊøλÖÃ
for ($px=$px1; $px<=$px2; $px=$px+ 0.9) {
if ($w!=0) {
$py = $A * sin($w*$px + $f)+ $b + self::$imageH/2; // y = Asin(¦Øx+¦Õ) + b
$i = (int) ((self::$fontSize - 6)/4);
while ($i > 0) {
imagesetpixel(self::$_image, $px + $i, $py + $i, self::$_color); // ÕaÀi»ÏñËصa±ÈimagettftextºÍimagestringÐÔÄÜÒªºÃºÜ¶a
$i--;
}
}
}
$A = mt_rand(1, self::$imageH/2); // Õñ*u
$f = mt_rand(-self::$imageH/4, self::$imageH/4); // XÖa*½ÏoÆ«ÒÆÁ¿
$T = mt_rand(self::$imageH*1.5, self::$imageL*2); // ÖÜÆÚ
$w = (2* M_PI)/$T;
$b = $py - $A * sin($w*$px + $f) - self::$imageH/2;
$px1 = $px2;
$px2 = self::$imageL;
for ($px=$px1; $px<=$px2; $px=$px+ 0.9) {
if ($w!=0) {
$py = $A * sin($w*$px + $f)+ $b + self::$imageH/2; // y = Asin(¦Øx+¦Õ) + b
$i = (int) ((self::$fontSize - 8)/4);
while ($i > 0) {
imagesetpixel(self::$_image, $px + $i, $py + $i, self::$_color); // ÕaÀi(while)Ñ»*»ÏñËصa±ÈimagettftextºÍimagestringÓÃ×ÖÌa´oСһ´Î»³o£¨²»ÓÃÕawhileÑ»*£(C)ÐÔÄÜÒªºÃºÜ¶a
$i--;
}
}
}
}
/**
* »ÔÓµa
* ÍuͼƬÉÏд²»Í¬ÑÕÉ«µÄ×Öĸ»oÊý×Ö
*/
protected static function _writeNoise() {
for($i = 0; $i < 10; $i++){
//ÔÓµaÑÕÉ«
$noiseColor = imagecolorallocate(
self::$_image,
mt_rand(150,225),
mt_rand(150,225),
mt_rand(150,225)
);
for($j = 0; $j < 5; $j++) {
// »aeÔÓµa
imagestring(
self::$_image,
5,
mt_rand(-10, self::$imageL),
mt_rand(-10, self::$imageH),
self::$codeSet[mt_rand(0, 27)], // ÔÓµaÎı¾ÎªËae»uµÄ×Öĸ»oÊý×Ö
$noiseColor
);
}
}
}
/**
* ÑeÖ¤ÑeÖ¤ÂeÊÇ*ñÕýÈ*
*
* @param string $code Óû§ÑeÖ¤Âe
* @param bool Óû§ÑeÖ¤ÂeÊÇ*ñÕýÈ*
*/
public static function check($code) {
isset($_SESSION) || session_start();
// ÑeÖ¤Âe²»ÄÜΪ¿Õ
if(empty($code) || empty($_SESSION[self::$seKey])) {
//echo $_SESSION[self::$seKey]['code'].'1';
return false;
}
// session ¹ýÆÚ
if(time() - $_SESSION[self::$seKey]['time'] > self::$expire) {
unset($_SESSION[self::$seKey]);
//echo $_SESSION[self::$seKey]['code'].'2';
return false;
//return 0;
}
// if($code == $_SESSION[self::$seKey]['code']) {
if(strtoupper($code) == $_SESSION[self::$seKey]['code']) { //²»Çø*Ö´oСд±È½Ï
//echo $_SESSION[self::$seKey]['code'].'3';
return true;
}
//echo $_SESSION[self::$seKey]['code'].'4';
return false;
}
}
// useage
/*
YL_Security_Secoder::$useNoise = false; // Òª¸u°²È«µÄ»°¸Ä³Étrue
YL_Security_Secoder::$useCurve = true;
YL_Security_Secoder::entry();
*/
/*
// ÑeÖ¤ÑeÖ¤Âe
if (!YL_Security_Secoder::check(@$_POST['secode'])) {
print 'error secode';
}
*/
Èý¡¢µ÷Óý¨
1¡¢ÏÔʾÑeÖ¤ÂeÒ³Ãaecode.php
<?php
session_start();
require 'secoder.class.php'; //ÏÈ°ÑÀa°uº¬½øÀ´£¬Êµ¼ÊÂ*¾¶¸u¾Ýʵ¼ÊÇe¿o½øÐÐÐ޸ġ£
$vcode = new YL_Security_Secoder(); //ʵÀý»¯Ò»¸o¶ÔÏo
$vcode->entry();
?>
2¡¢¼i²eÑeÖ¤ÂeÊÇñÕýÈ
<?php
session_start();
require 'secoder.class.php'; //ÏÈ°ÑÀa°uº¬½øÀ´£¬Êµ¼ÊÂ*¾¶¸u¾Ýʵ¼ÊÇe¿o½øÐÐÐ޸ġ£
$vcode = new YL_Security_Secoder(); //ʵÀý»¯Ò»¸o¶ÔÏo
//$vcode->entry();
$code = $_GET['code'];
echo $vcode->check($code);
//$_SESSION['code'] = $vc->getCode();//ÑeÖ¤Âe±£´aeµ½SESSIONÖÐ
?>
3¡¢ÑeÖ¤ÂeÊaÈe¿oµ÷ÓÃÒ³Ãae
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