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    array('hash_hmac', 'SHA256'),        'HS512' => array('hash_hmac', 'SHA512'),        'HS384' => array('hash_hmac', 'SHA384'),        'RS256' => array('openssl', 'SHA256'),    );    /**     * Decodes a JWT string into a PHP object.     *     * @param string            $jwt            The JWT     * @param string|array|null $key            The key, or map of keys.     *                                          If the algorithm used is asymmetric, this is the public key     * @param array             $allowed_algs   List of supported verification algorithms     *                                          Supported algorithms are 'HS256', 'HS384', 'HS512' and 'RS256'     *     * @return object The JWT's payload as a PHP object     *     * @throws DomainException              Algorithm was not provided     * @throws UnexpectedValueException     Provided JWT was invalid     * @throws SignatureInvalidException    Provided JWT was invalid because the signature verification failed     * @throws BeforeValidException         Provided JWT is trying to be used before it's eligible as defined by 'nbf'     * @throws BeforeValidException         Provided JWT is trying to be used before it's been created as defined by 'iat'     * @throws ExpiredException             Provided JWT has since expired, as defined by the 'exp' claim     *     * @uses jsonDecode     * @uses urlsafeB64Decode     */    public static function decode($jwt)    {        $key = config('token.secret');        $allowed_algs = [config('token.alg')];        if (empty($key)) {            return false;        }        $tks = explode('.', $jwt);        if (count($tks) != 3) {            return false;        }        list($headb64, $bodyb64, $cryptob64) = $tks;        if (null === ($header = self::jsonDecode(self::urlsafeB64Decode($headb64)))) {            return false;        }        if (null === $payload = self::jsonDecode(self::urlsafeB64Decode($bodyb64))) {            return false;        }        $sig = self::urlsafeB64Decode($cryptob64);                if (empty($header->alg)) {            return false;        }        if (empty(self::$supported_algs[$header->alg])) {            return false;        }        if (!is_array($allowed_algs) || !in_array($header->alg, $allowed_algs)) {            return false;        }        if (is_array($key) || $key instanceof \ArrayAccess) {            if (isset($header->kid)) {                $key = $key[$header->kid];            } else {                return false;            }        }        // Check the signature        if (!self::verify("$headb64.$bodyb64", $sig, $key, $header->alg)) {            return false;        }        // Check if the nbf if it is defined. This is the time that the        // token can actually be used. If it's not yet that time, abort.        if (isset($payload->nbf) && $payload->nbf > (time() + self::$leeway)) {            return false;        }        // Check that this token has been created before 'now'. This prevents        // using tokens that have been created for later use (and haven't        // correctly used the nbf claim).        if (isset($payload->iat) && $payload->iat > (time() + self::$leeway)) {            return false;        }        // Check if this token has expired.        if (isset($payload->exp) && (time() - self::$leeway) >= $payload->exp) {            return 10002;        }        if (isset($payload->uid)) {            if (!self::verifyPlatform($payload->uid)) {                return false;            }        }        return $payload;    }    public static function authorization()    {        $token = app('request')->header('X-'.config('app.name').'-Authorization');        Log::debug('Authorization', ['token' => $token]);        if ($payload = self::decode($token)) {            Log::debug('payload', ['payload' => $payload]);            if (is_object($payload) && property_exists($payload, 'uid')) {                return $payload->uid;            }        }        if ($payload == 10002) {            return 'token-expired';        }        return false;    }    public static function refresh()    {        $token = app('request')->header('X-'.config('app.name').'-Authorization');        if ($token) {            if ($payload = self::decode($token)) {                if (is_object($payload)) {                    // 超过1天                    if (property_exists($payload, 'exp')) {                        if ((time()+config('token.ttl')*60-$payload->exp) > config('token.refresh_ttl')*60) {                            return self::new_token($payload);                        }                    }                    // 版本号不匹配                    if (property_exists($payload, 'ver')) {                        if(version_compare(config('token.ver'), $payload->ver) != 0){                            return self::new_token($payload);                        }                    }                    // 没有版本号                    if (!property_exists($payload, 'ver')) {                        return self::new_token($payload);                    }                }            }        }        return false;    }    private static function new_token($payload)    {        return self::encode([                'uid' => $payload->uid,                'ver' => config('token.ver')            ]);    }    private static function str_mix($domain, $uuid)    {        $uuid = explode('-', $uuid);        $domain = explode('.', $domain);        $mixed = array_merge($uuid, $domain);        arsort($mixed);        return implode('-', $mixed);    }    private static function parse_domain($url)    {           $data = parse_url($url);        $host = $data['host'];        if (preg_match('/^www.*$/', $host)) {            return str_replace('www.', '', $host);        }        return $host;    }    /**     * Converts and signs a PHP object or array into a JWT string.     *     * @param object|array  $payload    PHP object or array     * @param string        $key        The secret key.     *                                  If the algorithm used is asymmetric, this is the private key     * @param string        $alg        The signing algorithm.     *                                  Supported algorithms are 'HS256', 'HS384', 'HS512' and 'RS256'     * @param array         $head       An array with header elements to attach     *     * @return string A signed JWT     *     * @uses jsonEncode     * @uses urlsafeB64Encode     */    public static function encode($payload, $keyId = null, $head = null)    {        $key = config('token.secret');        $alg = config('token.alg');        if (!isset($payload['exp'])) {            $payload['exp'] = time() + config('token.ttl') * 60;        }        if (isset($payload['uid'])) {            $payload['platform'] = self::setPlatform($payload['uid']);        }        $header = array('typ' => 'JWT', 'alg' => $alg);        if ($keyId !== null) {            $header['kid'] = $keyId;        }        if ( isset($head) && is_array($head) ) {            $header = array_merge($head, $header);        }        $segments = array();        $segments[] = self::urlsafeB64Encode(self::jsonEncode($header));        $segments[] = self::urlsafeB64Encode(self::jsonEncode($payload));        $signing_input = implode('.', $segments);        $signature = self::sign($signing_input, $key, $alg);        $segments[] = self::urlsafeB64Encode($signature);        return implode('.', $segments);    }    /**     * Sign a string with a given key and algorithm.     *     * @param string            $msg    The message to sign     * @param string|resource   $key    The secret key     * @param string            $alg    The signing algorithm.     *                                  Supported algorithms are 'HS256', 'HS384', 'HS512' and 'RS256'     *     * @return string An encrypted message     *     * @throws DomainException Unsupported algorithm was specified     */    public static function sign($msg, $key, $alg = 'HS256')    {        if (empty(self::$supported_algs[$alg])) {            return false;        }        list($function, $algorithm) = self::$supported_algs[$alg];        switch($function) {            case 'hash_hmac':                return hash_hmac($algorithm, $msg, $key, true);            case 'openssl':                $signature = '';                $success = openssl_sign($msg, $signature, $key, $algorithm);                if (!$success) {                    return false;                } else {                    return $signature;                }        }    }    /**     * Verify a signature with the message, key and method. Not all methods     * are symmetric, so we must have a separate verify and sign method.     *     * @param string            $msg        The original message (header and body)     * @param string            $signature  The original signature     * @param string|resource   $key        For HS*, a string key works. for RS*, must be a resource of an openssl public key     * @param string            $alg        The algorithm     *     * @return bool     *     * @throws DomainException Invalid Algorithm or OpenSSL failure     */    private static function verify($msg, $signature, $key, $alg)    {        if (empty(self::$supported_algs[$alg])) {            return false;        }        list($function, $algorithm) = self::$supported_algs[$alg];        switch($function) {            case 'openssl':                $success = openssl_verify($msg, $signature, $key, $algorithm);                if (!$success) {                    return false;                } else {                    return $signature;                }            case 'hash_hmac':            default:                $hash = hash_hmac($algorithm, $msg, $key, true);                if (function_exists('hash_equals')) {                    return hash_equals($signature, $hash);                }                $len = min(self::safeStrlen($signature), self::safeStrlen($hash));                $status = 0;                for ($i = 0; $i < $len; $i++) {                    $status |= (ord($signature[$i]) ^ ord($hash[$i]));                }                $status |= (self::safeStrlen($signature) ^ self::safeStrlen($hash));                return ($status === 0);        }    }    /**     * Decode a JSON string into a PHP object.     *     * @param string $input JSON string     *     * @return object Object representation of JSON string     *     * @throws DomainException Provided string was invalid JSON     */    public static function jsonDecode($input)    {        if (version_compare(PHP_VERSION, '5.4.0', '>=') && !(defined('JSON_C_VERSION') && PHP_INT_SIZE > 4)) {            /** In PHP >=5.4.0, json_decode() accepts an options parameter, that allows you             * to specify that large ints (like Steam Transaction IDs) should be treated as             * strings, rather than the PHP default behaviour of converting them to floats.             */            $obj = json_decode($input, false, 512, JSON_BIGINT_AS_STRING);        } else {            /** Not all servers will support that, however, so for older versions we must             * manually detect large ints in the JSON string and quote them (thus converting             *them to strings) before decoding, hence the preg_replace() call.             */            $max_int_length = strlen((string) PHP_INT_MAX) - 1;            $json_without_bigints = preg_replace('/:\s*(-?\d{'.$max_int_length.',})/', ': "$1"', $input);            $obj = json_decode($json_without_bigints);        }        if (function_exists('json_last_error') && $errno = json_last_error()) {            self::handleJsonError($errno);        } elseif ($obj === null && $input !== 'null') {            return false;        }        return $obj;    }    /**     * Encode a PHP object into a JSON string.     *     * @param object|array $input A PHP object or array     *     * @return string JSON representation of the PHP object or array     *     * @throws DomainException Provided object could not be encoded to valid JSON     */    public static function jsonEncode($input)    {        $json = json_encode($input);        if (function_exists('json_last_error') && $errno = json_last_error()) {            self::handleJsonError($errno);        } elseif ($json === 'null' && $input !== null) {            return false;        }        return $json;    }    /**     * Decode a string with URL-safe Base64.     *     * @param string $input A Base64 encoded string     *     * @return string A decoded string     */    public static function urlsafeB64Decode($input)    {        $remainder = strlen($input) % 4;        if ($remainder) {            $padlen = 4 - $remainder;            $input .= str_repeat('=', $padlen);        }        return base64_decode(strtr($input, '-_', '+/'));    }    /**     * Encode a string with URL-safe Base64.     *     * @param string $input The string you want encoded     *     * @return string The base64 encode of what you passed in     */    public static function urlsafeB64Encode($input)    {        return str_replace('=', '', strtr(base64_encode($input), '+/', '-_'));    }    /**     * Helper method to create a JSON error.     *     * @param int $errno An error number from json_last_error()     *     * @return void     */    private static function handleJsonError($errno)    {        $messages = array(            JSON_ERROR_DEPTH => 'Maximum stack depth exceeded',            JSON_ERROR_CTRL_CHAR => 'Unexpected control character found',            JSON_ERROR_SYNTAX => 'Syntax error, malformed JSON'        );        return false;    }    /**     * Get the number of bytes in cryptographic strings.     *     * @param string     *     * @return int     */    private static function safeStrlen($str)    {        if (function_exists('mb_strlen')) {            return mb_strlen($str, '8bit');        }        return strlen($str);    }    private static function setPlatform($uid)    {        $platform = Header::getUserAgent('Platform');        $key = "platform:{$uid}";        // cache        Cache::put($key, $platform, 0);        return $platform;    }    private static function verifyPlatform($uid)    {           return true;        $platform = Header::getUserAgent('Platform');        $key = "platform:{$uid}";        if ($platform == Cache::get($key)) {            return true;        }        return false;    }}

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