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캡챠 노이즈 추가

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chicpro
2015-11-16 14:01:03 +09:00
parent 34c633ebb9
commit 644250f3f3
2 changed files with 97 additions and 89 deletions
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170
plugin/kcaptcha/kcaptcha.lib.php
View File

@ -35,96 +35,98 @@ class KCAPTCHA{
$alphabet_length=strlen($alphabet);
do{
/*
// generating random keystring
while(true){
$this->keystring='';
for($i=0;$i<$length;$i++){
$this->keystring.=$allowed_symbols{mt_rand(0,strlen($allowed_symbols)-1)};
}
if(!preg_match('/cp|cb|ck|c6|c9|rn|rm|mm|co|do|cl|db|qp|qb|dp|ww/', $this->keystring)) break;
}
*/
$font_file=$fonts[mt_rand(0, count($fonts)-1)];
$font=imagecreatefrompng($font_file);
imagealphablending($font, true);
$fontfile_width=imagesx($font);
$fontfile_height=imagesy($font)-1;
$font_metrics=array();
$symbol=0;
$reading_symbol=false;
$font_file=$fonts[mt_rand(0, count($fonts)-1)];
$font=imagecreatefrompng($font_file);
imagealphablending($font, true);
$fontfile_width=imagesx($font);
$fontfile_height=imagesy($font)-1;
$font_metrics=array();
$symbol=0;
$reading_symbol=false;
// loading font
for($i=0;$i<$fontfile_width && $symbol<$alphabet_length;$i++){
$transparent = (imagecolorat($font, $i, 0) >> 24) == 127;
// loading font
for($i=0;$i<$fontfile_width && $symbol<$alphabet_length;$i++){
$transparent = (imagecolorat($font, $i, 0) >> 24) == 127;
if(!$reading_symbol && !$transparent){
$font_metrics[$alphabet{$symbol}]=array('start'=>$i);
$reading_symbol=true;
continue;
}
if(!$reading_symbol && !$transparent){
$font_metrics[$alphabet{$symbol}]=array('start'=>$i);
$reading_symbol=true;
continue;
}
if($reading_symbol && $transparent){
$font_metrics[$alphabet{$symbol}]['end']=$i;
$reading_symbol=false;
$symbol++;
continue;
}
}
if($reading_symbol && $transparent){
$font_metrics[$alphabet{$symbol}]['end']=$i;
$reading_symbol=false;
$symbol++;
continue;
}
}
$img=imagecreatetruecolor($width, $height);
imagealphablending($img, true);
$white=imagecolorallocate($img, 255, 255, 255);
$black=imagecolorallocate($img, 0, 0, 0);
$img=imagecreatetruecolor($width, $height);
imagealphablending($img, true);
$white=imagecolorallocate($img, 255, 255, 255);
$black=imagecolorallocate($img, 0, 0, 0);
imagefilledrectangle($img, 0, 0, $width-1, $height-1, $white);
imagefilledrectangle($img, 0, 0, $width-1, $height-1, $white);
// draw text
$x=1;
for($i=0;$i<strlen($this->keystring);$i++){
$m=$font_metrics[$this->keystring{$i}];
// draw text
$x=1;
$odd=mt_rand(0,1);
if($odd==0) $odd=-1;
for($i=0;$i<$length;$i++){
$m=$font_metrics[$this->keystring{$i}];
$y=mt_rand(-$fluctuation_amplitude, $fluctuation_amplitude)+($height-$fontfile_height)/2+2;
$y=(($i%2)*$fluctuation_amplitude - $fluctuation_amplitude/2)*$odd
+ mt_rand(-round($fluctuation_amplitude/3), round($fluctuation_amplitude/3))
+ ($height-$fontfile_height)/2;
if($no_spaces){
$shift=0;
if($i>0){
$shift=10000;
for($sy=7;$sy<$fontfile_height-20;$sy+=1){
for($sx=$m['start']-1;$sx<$m['end'];$sx+=1){
$rgb=imagecolorat($font, $sx, $sy);
$opacity=$rgb>>24;
if($opacity<127){
$left=$sx-$m['start']+$x;
$py=$sy+$y;
if($py>$height) break;
for($px=min($left,$width-1);$px>$left-12 && $px>=0;$px-=1){
$color=imagecolorat($img, $px, $py) & 0xff;
if($color+$opacity<190){
if($shift>$left-$px){
$shift=$left-$px;
}
break;
}
}
break;
}
}
}
if($shift==10000){
$shift=mt_rand(4,6);
}
if($no_spaces){
$shift=0;
if($i>0){
$shift=10000;
for($sy=3;$sy<$fontfile_height-10;$sy+=1){
for($sx=$m['start']-1;$sx<$m['end'];$sx+=1){
$rgb=imagecolorat($font, $sx, $sy);
$opacity=$rgb>>24;
if($opacity<127){
$left=$sx-$m['start']+$x;
$py=$sy+$y;
if($py>$height) break;
for($px=min($left,$width-1);$px>$left-200 && $px>=0;$px-=1){
$color=imagecolorat($img, $px, $py) & 0xff;
if($color+$opacity<170){ // 170 - threshold
if($shift>$left-$px){
$shift=$left-$px;
}
break;
}
}
break;
}
}
}
if($shift==10000){
$shift=mt_rand(4,6);
}
}
}else{
$shift=1;
}
imagecopy($img, $font, $x-$shift, $y, $m['start'], 1, $m['end']-$m['start'], $fontfile_height);
$x+=$m['end']-$m['start']-$shift;
}
}while($x>=$width-10); // while not fit in canvas
}
}else{
$shift=1;
}
imagecopy($img, $font, $x-$shift, $y, $m['start'], 1, $m['end']-$m['start'], $fontfile_height);
$x+=$m['end']-$m['start']-$shift;
}
//noise
$white=imagecolorallocate($font, 255, 255, 255);
$black=imagecolorallocate($font, 0, 0, 0);
for($i=0;$i<(($height-30)*$x)*$white_noise_density;$i++){
imagesetpixel($img, mt_rand(0, $x-1), mt_rand(10, $height-15), $white);
}
for($i=0;$i<(($height-30)*$x)*$black_noise_density;$i++){
imagesetpixel($img, mt_rand(0, $x-1), mt_rand(10, $height-15), $black);
}
$center=$x/2;
@ -235,21 +237,17 @@ class KCAPTCHA{
// 캡챠 HTML 코드 출력
function captcha_html($class="captcha")
{
if(is_mobile())
$class .= ' m_captcha';
$html .= "\n".'<script>var g5_captcha_url = "'.G5_CAPTCHA_URL.'";</script>';
//$html .= "\n".'<script>var g5_captcha_path = "'.G5_CAPTCHA_PATH.'";</script>';
$html .= "\n".'<script src="'.G5_CAPTCHA_URL.'/kcaptcha.js"></script>';
$html .= "\n".'<fieldset id="captcha" class="'.$class.'">';
$html .= "\n".'<legend><label for="captcha_key">자동등록방지</label></legend>';
if (is_mobile()) $html .= '<audio src="#" id="captcha_audio" controls></audio>';
//$html .= "\n".'<img src="#" alt="" id="captcha_img">';
$html .= "\n".'<img src="javascript:void(0);" alt="" id="captcha_img">';
if (!is_mobile()) $html .= "\n".'<button type="button" id="captcha_mp3"><span></span>숫자음성듣기</button>';
$html .= "\n".'<button type="button" id="captcha_mp3"><span></span>숫자음성듣기</button>';
$html .= "\n".'<button type="button" id="captcha_reload"><span></span>새로고침</button>';
$html .= '<input type="text" name="captcha_key" id="captcha_key" required class="captcha_box required" size="6" maxlength="6">';
$html .= "\n".'<span id="captcha_info">자동등록방지 숫자를 순서대로 입력하세요.</span>';
$html .= "\n".'<span id="captcha_info">자동등록방지 영숫자를 순서대로 입력하세요.</span>';
$html .= "\n".'</fieldset>';
return $html;
}

16
plugin/kcaptcha/kcaptcha_config.php
View File

@ -6,21 +6,31 @@ $alphabet = "0123456789abcdefghijklmnopqrstuvwxyz"; # do not change without chan
# symbols used to draw CAPTCHA
$allowed_symbols = "0123456789"; #digits
//$allowed_symbols = "0123456789abcdef"; #digits // 스캔 방지를 위하여 abcdef 추가 151029 15:00
//$allowed_symbols = "abcdeghkmnpqsuvxyz"; #digits
//$allowed_symbols = "23456789abcdeghkmnpqsuvxyz"; #alphabet without similar symbols (o=0, 1=l, i=j, t=f)
# folder with fonts
$fontsdir = 'fonts';
$fontsdir = 'fonts';
# CAPTCHA string length
//$length = mt_rand(5,6); # random 5 or 6
$length = 6;
# CAPTCHA image size (you do not need to change it, whis parameters is optimal)
$width = 120;
$width = 160;
$height = 60;
# symbol's vertical fluctuation amplitude divided by 2
$fluctuation_amplitude = 5;
//$fluctuation_amplitude = 5;
//$fluctuation_amplitude = 11; // 파동&진폭 151028 14:00
$fluctuation_amplitude = 5; // 파동&진폭 원래대로 151029 15:00
#noise
//$white_noise_density=0; // no white noise
$white_noise_density=1/6;
//$black_noise_density=0; // no black noise
$black_noise_density=1/20;
# increase safety by prevention of spaces between symbols
$no_spaces = false;