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📄 recaptchalib.php(4.96 KB)

Editing: recaptchalib.php

<?php

define("ZCFRECAPTCHAAPI", "http://www.google.com/recaptcha/api");
define("ZCFRECAPTCHASECUREAPI", "https://www.google.com/recaptcha/api");
define("ZCFRECAPTCHAVERIFYSERVER", "www.google.com");

function zcf_recaptcha_qsencode($data) {
    $req = "";
    foreach ($data as $key => $value)
        $req .= $key . '=' . urlencode(stripslashes($value)) . '&';

// Cut the last '&'
    $req = substr($req, 0, strlen($req) - 1);
    return $req;
}

function zcf_recaptcha_http_post($host, $path, $data, $port = 80) {

$req = zcf_recaptcha_qsencode($data);

$http_request = "POST $path HTTP/1.0\r\n";
    $http_request .= "Host: $host\r\n";
    $http_request .= "Content-Type: application/x-www-form-urlencoded;\r\n";
    $http_request .= "Content-Length: " . strlen($req) . "\r\n";
    $http_request .= "User-Agent: reCAPTCHA/PHP\r\n";
    $http_request .= "\r\n";
    $http_request .= $req;

$response = '';
    if (false == ( $fs = @fsockopen($host, $port, $errno, $errstr, 10) )) {
        die('Could not open socket');
    }

fwrite($fs, $http_request);

while (!feof($fs))
        $response .= fgets($fs, 1160); // One TCP-IP packet
    fclose($fs);
    $response = explode("\r\n\r\n", $response, 2);

return $response;
}

function zcf_recaptcha_get_html($pubkey, $error = null, $use_ssl = false) {

if ($use_ssl) {
        $server = ZCFRECAPTCHASECUREAPI;
    } else {
        $server = ZCFRECAPTCHAAPI;
    }

$errorpart = "";
    if ($error) {
        $errorpart = "&amp;error=" . $error;
    }
    return '<script type="text/javascript" src="' . $server . '/challenge?k=' . $pubkey . $errorpart . '"></script>

class WpReCaptchaResponse{

var $is_valid;
    var $error;

}

function zcf_recaptcha_check_answer($privkey, $remoteip, $challenge, $response, $extra_params = array()) {
   
    if ($remoteip == null || $remoteip == '') {
        die("For security reasons, you must pass the remote ip to reCAPTCHA");
    }

//discard spam submissions
    if ($challenge == null || strlen($challenge) == 0 || $response == null || strlen($response) == 0) {
        $recaptcha_response = new WpReCaptchaResponse();
        $recaptcha_response->is_valid = false;
        $recaptcha_response->error = 'incorrect-captcha-sol';
        return $recaptcha_response;
    }

$response = zcf_recaptcha_http_post(ZCFRECAPTCHAVERIFYSERVER, "/recaptcha/api/verify", array(
        'privatekey' => $privkey,
        'remoteip' => $remoteip,
        'challenge' => $challenge,
        'response' => $response
            ) + $extra_params
    );

$answers = explode("\n", $response [1]);
    $recaptcha_response = new WpReCaptchaResponse();

if (trim($answers [0]) == 'true') {
        $recaptcha_response->is_valid = true;
    } else {
        $recaptcha_response->is_valid = false;
        $recaptcha_response->error = $answers [1];
    }
    return $recaptcha_response;
}

function zcf_recaptcha_aes_pad($val) {
    $block_size = 16;
    $numpad = $block_size - (strlen($val) % $block_size);
    return str_pad($val, strlen($val) + $numpad, chr($numpad));
}

function zcf_recaptcha_aes_encrypt($val, $ky) {
    if (!function_exists("mcrypt_encrypt")) {
        die("To use reCAPTCHA Mailhide, you need to have the mcrypt php module installed.");
    }
    $mode = MCRYPT_MODE_CBC;
    $enc = MCRYPT_RIJNDAEL_128;
    $val = zcf_recaptcha_aes_pad($val);
    return mcrypt_encrypt($enc, $ky, $val, $mode, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0");
}

function zcf_recaptcha_mailhide_urlbase64($x) {
    return strtr(base64_encode($x), '+/', '-_');
}

function zcf_recaptcha_mailhide_url($pubkey, $privkey, $email) {

$ky = pack('H*', $privkey);
    $cryptmail = zcf_recaptcha_aes_encrypt($email, $ky);

return "http://www.google.com/recaptcha/mailhide/d?k=" . $pubkey . "&c=" . zcf_recaptcha_mailhide_urlbase64($cryptmail);
}

function zcf_recaptcha_mailhide_email_parts($email) {
    $arr = preg_split("/@/", $email);

if (strlen($arr[0]) <= 4) {
        $arr[0] = substr($arr[0], 0, 1);
    } else if (strlen($arr[0]) <= 6) {
        $arr[0] = substr($arr[0], 0, 3);
    } else {
        $arr[0] = substr($arr[0], 0, 4);
    }
    return $arr;
}

function zcf_recaptcha_mailhide_html($pubkey, $privkey, $email) {
    $emailparts = zcf_recaptcha_mailhide_email_parts($email);
    $url = zcf_recaptcha_mailhide_url($pubkey, $privkey, $email);

return htmlentities($emailparts[0]) . "<a href='" . htmlentities($url) .
            "' onclick=\"window.open('" . htmlentities($url) . "', '', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=500,height=300'); return false;\" title=\"Reveal this e-mail address\">...</a>@" . htmlentities($emailparts [1]);
}

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