From 3b2e04f16a595893e8736a9b816bad81ecc8bf6a Mon Sep 17 00:00:00 2001 From: Starla Insigna Date: Fri, 12 Mar 2010 21:46:15 -0500 Subject: Added working CAPTCHA After a little digging, it turned out that the reason that reCAPTCHA always failed was because the reCAPTCHA server was blocked to the server. This should've been obvious as the reCAPTCHA always worked on the development server. --- includes/recaptchalib.php | 277 ---------------------------------------------- 1 file changed, 277 deletions(-) delete mode 100755 includes/recaptchalib.php (limited to 'includes/recaptchalib.php') diff --git a/includes/recaptchalib.php b/includes/recaptchalib.php deleted file mode 100755 index 897c509..0000000 --- a/includes/recaptchalib.php +++ /dev/null @@ -1,277 +0,0 @@ - $value ) - $req .= $key . '=' . urlencode( stripslashes($value) ) . '&'; - - // Cut the last '&' - $req=substr($req,0,strlen($req)-1); - return $req; -} - - - -/** - * Submits an HTTP POST to a reCAPTCHA server - * @param string $host - * @param string $path - * @param array $data - * @param int port - * @return array response - */ -function _recaptcha_http_post($host, $path, $data, $port = 80) { - - $req = _recaptcha_qsencode ($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; -} - - - -/** - * Gets the challenge HTML (javascript and non-javascript version). - * This is called from the browser, and the resulting reCAPTCHA HTML widget - * is embedded within the HTML form it was called from. - * @param string $pubkey A public key for reCAPTCHA - * @param string $error The error given by reCAPTCHA (optional, default is null) - * @param boolean $use_ssl Should the request be made over ssl? (optional, default is false) - - * @return string - The HTML to be embedded in the user's form. - */ -function recaptcha_get_html ($pubkey, $error = null, $use_ssl = false) -{ - if ($pubkey == null || $pubkey == '') { - die ("To use reCAPTCHA you must get an API key from http://recaptcha.net/api/getkey"); - } - - if ($use_ssl) { - $server = RECAPTCHA_API_SECURE_SERVER; - } else { - $server = RECAPTCHA_API_SERVER; - } - - $errorpart = ""; - if ($error) { - $errorpart = "&error=" . $error; - } - return ' - - '; -} - - - - -/** - * A ReCaptchaResponse is returned from recaptcha_check_answer() - */ -class ReCaptchaResponse { - var $is_valid; - var $error; -} - - -/** - * Calls an HTTP POST function to verify if the user's guess was correct - * @param string $privkey - * @param string $remoteip - * @param string $challenge - * @param string $response - * @param array $extra_params an array of extra variables to post to the server - * @return ReCaptchaResponse - */ -function recaptcha_check_answer ($privkey, $remoteip, $challenge, $response, $extra_params = array()) -{ - if ($privkey == null || $privkey == '') { - die ("To use reCAPTCHA you must get an API key from http://recaptcha.net/api/getkey"); - } - - if ($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 ReCaptchaResponse(); - $recaptcha_response->is_valid = false; - $recaptcha_response->error = 'incorrect-captcha-sol'; - return $recaptcha_response; - } - - $response = _recaptcha_http_post (RECAPTCHA_VERIFY_SERVER, "/verify", - array ( - 'privatekey' => $privkey, - 'remoteip' => $remoteip, - 'challenge' => $challenge, - 'response' => $response - ) + $extra_params - ); - - $answers = explode ("\n", $response [1]); - $recaptcha_response = new ReCaptchaResponse(); - - if (trim ($answers [0]) == 'true') { - $recaptcha_response->is_valid = true; - } - else { - $recaptcha_response->is_valid = false; - $recaptcha_response->error = $answers [1]; - } - return $recaptcha_response; - -} - -/** - * gets a URL where the user can sign up for reCAPTCHA. If your application - * has a configuration page where you enter a key, you should provide a link - * using this function. - * @param string $domain The domain where the page is hosted - * @param string $appname The name of your application - */ -function recaptcha_get_signup_url ($domain = null, $appname = null) { - return "http://recaptcha.net/api/getkey?" . _recaptcha_qsencode (array ('domain' => $domain, 'app' => $appname)); -} - -function _recaptcha_aes_pad($val) { - $block_size = 16; - $numpad = $block_size - (strlen ($val) % $block_size); - return str_pad($val, strlen ($val) + $numpad, chr($numpad)); -} - -/* Mailhide related code */ - -function _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; - $val=_recaptcha_aes_pad($val); - return mcrypt_encrypt($enc, $ky, $val, $mode, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"); -} - - -function _recaptcha_mailhide_urlbase64 ($x) { - return strtr(base64_encode ($x), '+/', '-_'); -} - -/* gets the reCAPTCHA Mailhide url for a given email, public key and private key */ -function recaptcha_mailhide_url($pubkey, $privkey, $email) { - if ($pubkey == '' || $pubkey == null || $privkey == "" || $privkey == null) { - die ("To use reCAPTCHA Mailhide, you have to sign up for a public and private key, " . - "you can do so at http://mailhide.recaptcha.net/apikey"); - } - - - $ky = pack('H*', $privkey); - $cryptmail = _recaptcha_aes_encrypt ($email, $ky); - - return "http://mailhide.recaptcha.net/d?k=" . $pubkey . "&c=" . _recaptcha_mailhide_urlbase64 ($cryptmail); -} - -/** - * gets the parts of the email to expose to the user. - * eg, given johndoe@example,com return ["john", "example.com"]. - * the email is then displayed as john...@example.com - */ -function _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 $arr; -} - -/** - * Gets html to display an email address given a public an private key. - * to get a key, go to: - * - * http://mailhide.recaptcha.net/apikey - */ -function recaptcha_mailhide_html($pubkey, $privkey, $email) { - $emailparts = _recaptcha_mailhide_email_parts ($email); - $url = recaptcha_mailhide_url ($pubkey, $privkey, $email); - - return htmlentities($emailparts[0]) . "...@" . htmlentities ($emailparts [1]); - -} - - -?> -- cgit 1.4.1