'InputCaptcha',
':html' => "",
':args' => array('value', 'placeholder', 'required'),
'size' => 5,
'autocomplete' => 'off',
'name' => $CaptchaName,
'class' => 'inputbox'
));
SDVA($InputTags['captcha1'], $InputTags['captcha']);
$InputTags['captcha1'][':fn'] = 'InputCaptcha1';
array_unshift($EditFunctions, 'RequireCaptcha');
SDV($HandleActions['captchaimage'], 'HandleCaptchaImage');
SDV($HandleAuth['captchaimage'], 'read');
if (!function_exists('pm_session_start')) {
function pm_session_start() {
return @session_start();
}
}
function RequireCaptcha($pagename, $page, $new) {
global $EnablePostCaptchaRequired, $MessagesFmt,
$CaptchaRequiredFmt, $EnablePost;
if (!IsEnabled($EnablePostCaptchaRequired, 0)) return;
if (IsCaptcha()) return;
SDV($CaptchaRequiredFmt,
"$[Must enter valid code]
");
$MessagesFmt[] = $CaptchaRequiredFmt;
$EnablePost = 0;
}
function IsCaptcha() {
global $CaptchaPmToken, $IsCaptcha, $CaptchaName, $EnableCaptchaSession;
if (isset($IsCaptcha)) return $IsCaptcha;
if ($CaptchaPmToken && !pmtoken(1)) return 0;
$key = @$_POST['captchakey'];
$resp = @$_POST[$CaptchaName];
$sid = session_id();
pm_session_start();
if (!is_null($key) && $resp && isset($_SESSION['captcha-challenges'][$key])) {
# response posted
if ($_SESSION['captcha-challenges'][$key] == $resp)
$IsCaptcha = 1;
else
# prevent replay
unset($_SESSION['captcha-challenges'][$key]);
}
if (IsEnabled($EnableCaptchaSession, 0)) {
$IsCaptcha |= @$_SESSION['iscaptcha'];
$_SESSION['iscaptcha'] = $IsCaptcha;
}
$IsCaptcha = (int)@$IsCaptcha;
if (!$sid) session_write_close();
return $IsCaptcha;
}
function InputCaptcha($pagename, $type, $args) {
CaptchaValue();
return Keep(InputToHTML($pagename, $type, $args, $opt));
}
function InputCaptcha1($pagename, $type, $args) {
if (@$_SESSION['iscaptcha']) return '';
CaptchaValue();
$chall = CaptchaFn($pagename);
return Keep($chall.InputToHTML($pagename, $type, $args, $opt));
}
function CaptchaValue() {
global $CaptchaKey, $CaptchaValue;
if ($CaptchaKey > '' &&
@$_SESSION['captcha-challenges'][$CaptchaKey] == $CaptchaValue)
return $CaptchaValue;
$sid = session_id();
pm_session_start();
if ($CaptchaKey == '') {
if (isset($_SESSION['captcha-challenges']))
$CaptchaKey = max(array_keys($_SESSION['captcha-challenges']))+1;
else $CaptchaKey = 0;
}
$_SESSION['captcha-challenges'][$CaptchaKey] = $CaptchaValue;
if (!$sid) session_write_close();
return $CaptchaValue;
}
function CaptchaFn($pagename) {
global $CaptchaChallenge, $EnableCaptchaImage;
if (@$CaptchaChallenge) return $CaptchaChallenge;
if ($EnableCaptchaImage) return CaptchaImage($pagename);
return CaptchaValue();
}
function CaptchaImage($pagename) {
global $CaptchaImageFmt, $CaptchaImageEmbedFmt, $CaptchaImageCSS, $EnableCaptchaImageDataURI;
NoCache();
$value = CaptchaValue();
SDV($CaptchaImageCSS, "border: none; vertical-align:top;");
SDV($CaptchaImageFmt, "
");
SDV($CaptchaImageEmbedFmt, "
");
if (! IsEnabled($EnableCaptchaImageDataURI, 0))
return Keep(FmtPageName($CaptchaImageFmt, $pagename));
ob_start();
CreateCaptchaImage($value);
$i = base64_encode(ob_get_clean());
return Keep(sprintf($CaptchaImageEmbedFmt, $i));
}
function HandleCaptchaImage($pagename, $auth = 'read') {
global $CaptchaImage;
$key = @$_REQUEST['captchakey'];
if ($key == '') return '';
pm_session_start();
$value = @$_SESSION['captcha-challenges'][$key];
if (!$value) {
$value = 'Error';
}
header('Content-type: image/jpeg');
header('Cache-Control: no-store, no-cache, must-revalidate');
header('Expires: Tue, 01 Jan 2002 00:00:00 GMT');
CreateCaptchaImage($value);
return;
}
function CreateCaptchaImage($value) {
global $CaptchaRandFn;
$width = 60;
$height = 22;
$fontwidth = 10;
$fontheight = 14;
$img = imagecreatetruecolor($width, $height);
$white = imagecolorallocate($img, 240, 240, 240);
imagefilledrectangle($img, 0, 0, $width, $height, $white);
imagealphablending($img, 1);
imagecolortransparent($img);
for($i=0; $i < 100; $i++) {
$r = $CaptchaRandFn(200, 255); $g = $CaptchaRandFn(200, 255); $b = $CaptchaRandFn(200, 255);
$color = imagecolorallocate($img, $r, $g, $b);
imagefilledellipse($img, round($CaptchaRandFn(0, $width)), round($CaptchaRandFn(0, $height)),
@round($CaptchaRandFn(0, $width/8)), @round($CaptchaRandFn(0, $height/4)), $color);
}
$vlen = strlen($value);
$x = $CaptchaRandFn(2, ($width)/($vlen+1));
for($i=0; $i < $vlen; $i++) {
$y = $CaptchaRandFn(2, $height - $fontheight - 2);
$r = $CaptchaRandFn(0, 150); $g = $CaptchaRandFn(0, 150); $b = $CaptchaRandFn(0, 150);
$fg = imagecolorallocatealpha($img, $r, $g, $b, 30);
$c = substr($value, $i, 1);
imagechar($img, 5, $x, $y, $c, $fg);
$min = min($fontwidth + 2, ($width-$x)/($vlen-$i));
$max = max($fontwidth + 2, ($width-$x)/($vlen-$i));
$x += @$CaptchaRandFn($min, $max);
}
imagejpeg($img);
imagedestroy($img);
return;
}