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<?php |
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/* For licensing terms, see /license.txt */ |
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/** |
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* @package chamilo.webservices |
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*/ |
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$realm = 'The batcave'; |
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// Just a random id |
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$nonce = uniqid(); |
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// Get the digest from the http header |
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$digest = getDigest(); |
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// If there was no digest, show login |
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if (is_null($digest)) { |
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requireLogin($realm, $nonce); |
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} |
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$digestParts = digestParse($digest); |
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$validUser = 'admin'; |
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$validPass = 'admin'; |
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// Based on all the info we gathered we can figure out what the response should be |
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$A1 = md5("{$digestParts['username']}:{$realm}:{$validPass}"); |
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$A2 = md5("{$_SERVER['REQUEST_METHOD']}:{$digestParts['uri']}"); |
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$validResponse = md5("{$A1}:{$digestParts['nonce']}:{$digestParts['nc']}:{$digestParts['cnonce']}:{$digestParts['qop']}:{$A2}"); |
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if ($digestParts['response'] != $validResponse) { |
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requireLogin($realm, $nonce); |
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} else { |
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// We're in! |
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echo 'a7532ae474e5e66a0c16eddab02e02a7'; |
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exit(); |
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} |
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// This function returns the digest string |
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function getDigest() |
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{ |
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// mod_php |
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if (isset($_SERVER['PHP_AUTH_DIGEST'])) { |
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$digest = $_SERVER['PHP_AUTH_DIGEST']; |
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// most other servers |
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} elseif (isset($_SERVER['HTTP_AUTHENTICATION'])) { |
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if (strpos( |
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strtolower($_SERVER['HTTP_AUTHENTICATION']), |
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'digest' |
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) === 0) { |
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$digest = substr($_SERVER['HTTP_AUTHORIZATION'], 7); |
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} |
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} elseif (isset($_SERVER['HTTP_WWW_AUTHENTICATE'])) { |
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$digest = $_SERVER['HTTP_WWW_AUTHENTICATE']; |
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} |
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return $digest; |
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} |
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// This function forces a login prompt |
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function requireLogin($realm, $nonce) |
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{ |
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header('WWW-Authenticate: Digest realm="'.$realm.'",qop="auth",nonce="'.$nonce.'",opaque="'.md5($realm).'"'); |
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header('HTTP/1.1 401'); |
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echo 'Authentication Canceled'; |
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exit(); |
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} |
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// This function extracts the separate values from the digest string |
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function digestParse($digest) |
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{ |
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// protect against missing data |
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$needed_parts = ['nonce' => 1, 'nc' => 1, 'cnonce' => 1, 'qop' => 1, 'username' => 1, 'uri' => 1, 'response' => 1]; |
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$data = []; |
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preg_match_all('@(\w+)=(?:(?:")([^"]+)"|([^\s,$]+))@', $digest, $matches, PREG_SET_ORDER); |
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foreach ($matches as $m) { |
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$data[$m[1]] = $m[2] ? $m[2] : $m[3]; |
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unset($needed_parts[$m[1]]); |
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} |
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return $needed_parts ? false : $data; |
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} |
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chamilo /
chamilo-lms
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