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Use X-Forwarded-Proto to determine port #634

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Use X-Forwarded-Proto to determine port #634

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21 changes: 19 additions & 2 deletions lib/Saml2/Utils.php
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Original file line number Diff line number Diff line change
Expand Up @@ -573,8 +573,8 @@ public static function getSelfPort()
$portnumber = null;
if (self::$_port) {
$portnumber = self::$_port;
} else if (self::getProxyVars() && isset($_SERVER["HTTP_X_FORWARDED_PORT"])) {
$portnumber = $_SERVER["HTTP_X_FORWARDED_PORT"];
} else if (self::getProxyVars() && self::determinePortFromProxyVars() !== null) {
$portnumber = self::determinePortFromProxyVars();
} else if (isset($_SERVER["SERVER_PORT"])) {
$portnumber = $_SERVER["SERVER_PORT"];
} else {
Expand All @@ -591,6 +591,23 @@ public static function getSelfPort()
return $portnumber;
}

/**
* @return null|string The port number inferred from the proxy variables (HTTP_X_FORWARDED_...)
*/
private static function determinePortFromProxyVars()
{
if (isset($_SERVER["HTTP_X_FORWARDED_PORT"])) {
return $_SERVER["HTTP_X_FORWARDED_PORT"];
} else if (isset($_SERVER["HTTP_X_FORWARDED_PROTO"])) {
if ($_SERVER["HTTP_X_FORWARDED_PROTO"] == 'https') {
return '443';
} elseif ($_SERVER["HTTP_X_FORWARDED_PROTO"] == 'http') {
return '80';
}
}
return null;
}

/**
* Checks if https or http.
*
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