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<?php
/*
* Copyright (c) 2009 by Jeff Weisberg
* Author: Jeff Weisberg
* Created: 2009-Jun-22 16:44 (EDT)
* Function: SolveMedia API php code
*
* $Id$
*
* This is a PHP library that handles calling SolveMedia.
* - Documentation and latest version
* http://www.solvemedia.com/
* - Get a SolveMedia API Keys
* http://api.solvemedia.com/public/signup
*/
/* This code is based on code from,
* and copied, modified and distributed with permission in accordance with its terms:
*
* Copyright (c) 2007 reCAPTCHA
* AUTHORS:
* Mike Crawford
* Ben Maurer
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
/**
* The solvemedia server URL's
*/
define("ADCOPY_API_SERVER", "http://api.solvemedia.com");
define("ADCOPY_API_SECURE_SERVER", "https://api-secure.solvemedia.com");
define("ADCOPY_VERIFY_SERVER", "verify.solvemedia.com");
define("ADCOPY_SIGNUP", "http://api.solvemedia.com/public/signup");
/**
* Encodes the given data into a query string format
* @param $data - array of string elements to be encoded
* @return string - encoded request
*/
function _adcopy_qsencode ($data) {
$req = "";
foreach ( $data as $key => $value )
$req .= $key . '=' . urlencode( stripslashes($value) ) . '&';
// Cut the last '&'
$req=substr($req,0,strlen($req)-1);
return $req;
}
/**
* Submits an HTTP POST to a solvemedia server
* @param string $host
* @param string $path
* @param array $data
* @param int port
* @return array response
*/
function _adcopy_http_post($host, $path, $data, $port = 80) {
$req = _adcopy_qsencode ($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: solvemedia/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, 1024); // One TCP-IP packet [sic]
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 solvemedia HTML widget
* is embedded within the HTML form it was called from.
* @param string $pubkey A public key for solvemedia
* @param string $error The error given by solvemedia (optional, default is null)
* @param boolean $use_ssl Should the request be made over ssl? (optional, default is false)
* @return string - The HTML to be embedded in the user's form.
*/
function solvemedia_get_html ($pubkey, $error = null, $use_ssl = false)
{
if ($pubkey == null || $pubkey == '') {
die ("To use solvemedia you must get an API key from <a href='" . ADCOPY_SIGNUP . "'>" . ADCOPY_SIGNUP . "</a>");
}
if ($use_ssl) {
$server = ADCOPY_API_SECURE_SERVER;
} else {
$server = ADCOPY_API_SERVER;
}
$errorpart = "";
if ($error) {
$errorpart = ";error=1";
}
return '<script type="text/javascript" src="'. $server . '/papi/challenge.script?k=' . $pubkey . $errorpart . '"></script>
<noscript>
<iframe src="'. $server . '/papi/challenge.noscript?k=' . $pubkey . $errorpart . '" height="300" width="500" frameborder="0"></iframe><br/>
<textarea name="adcopy_challenge" rows="3" cols="40"></textarea>
<input type="hidden" name="adcopy_response" value="manual_challenge"/>
</noscript>';
}
/**
* A SolveMediaResponse is returned from solvemedia_check_answer()
*/
class SolveMediaResponse {
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 string $hashkey
* @return SolveMediaResponse
*/
function solvemedia_check_answer ($privkey, $remoteip, $challenge, $response, $hashkey = '' )
{
if ($privkey == null || $privkey == '') {
die ("To use solvemedia you must get an API key from <a href='" . ADCOPY_SIGNUP . "'>" . ADCOPY_SIGNUP . "</a>");
}
if ($remoteip == null || $remoteip == '') {
die ("For security reasons, you must pass the remote ip to solvemedia");
}
//discard spam submissions
if ($challenge == null || strlen($challenge) == 0 || $response == null || strlen($response) == 0) {
$adcopy_response = new SolveMediaResponse();
$adcopy_response->is_valid = false;
$adcopy_response->error = 'incorrect-solution';
return $adcopy_response;
}
$response = _adcopy_http_post (ADCOPY_VERIFY_SERVER, "/papi/verify",
array (
'privatekey' => $privkey,
'remoteip' => $remoteip,
'challenge' => $challenge,
'response' => $response
)
);
$answers = explode ("\n", $response [1]);
$adcopy_response = new SolveMediaResponse();
if( strlen($hashkey) ){
# validate message authenticator
$hash = sha1( $answers[0] . $challenge . $hashkey );
if( $hash != $answers[2] ){
$adcopy_response->is_valid = false;
$adcopy_response->error = 'hash-fail';
return $adcopy_response;
}
}
if (trim ($answers [0]) == 'true') {
$adcopy_response->is_valid = true;
}
else {
$adcopy_response->is_valid = false;
$adcopy_response->error = $answers [1];
}
return $adcopy_response;
}
/**
* gets a URL where the user can sign up for solvemedia. 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 $appname The name of your application
*/
function solvemedia_get_signup_url ($domain = null, $appname = null) {
return ADCOPY_SIGNUP . "?" . _adcopy_qsencode (array ('domain' => $domain, 'app' => $appname));
}
/* Mailhide related code */
/* [ deleted ] */
?>