public static function sign()

in src/JWT.php [204:238]

• 34 lines of code
• 9 McCabe index (conditional complexity)

    public static function sign($msg, $key, $alg)
    {
        if (empty(static::$supported_algs[$alg])) {
            throw new DomainException('Algorithm not supported');
        }
        list($function, $algorithm) = static::$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) {
                    throw new DomainException("OpenSSL unable to sign data");
                }
                if ($alg === 'ES256') {
                    $signature = self::signatureFromDER($signature, 256);
                } elseif ($alg === 'ES384') {
                    $signature = self::signatureFromDER($signature, 384);
                }
                return $signature;
            case 'sodium_crypto':
                if (!function_exists('sodium_crypto_sign_detached')) {
                    throw new DomainException('libsodium is not available');
                }
                try {
                    // The last non-empty line is used as the key.
                    $lines = array_filter(explode("\n", $key));
                    $key = base64_decode(end($lines));
                    return sodium_crypto_sign_detached($msg, $key);
                } catch (Exception $e) {
                    throw new DomainException($e->getMessage(), 0, $e);
                }
        }
    }