Method getMasterKeyOrNull

src/FileRise/Support/CryptoAtRest.php:112–140

()

    }

    public static function getMasterKeyOrNull(): ?string
    {
        if (!self::isAvailable()) {
            return null;
        }
        if (self::$cachedKey !== null) {
            return self::$cachedKey;
        }

        $env = getenv('FR_ENCRYPTION_MASTER_KEY');
        if (is_string($env) && $env !== '') {
            $k = self::parseKeyString($env);
            if ($k !== null) {
                self::$cachedKey = $k;
                return $k;
            }
        }

        $kf = self::keyFilePath();
        if (is_file($kf)) {
            $bin = @file_get_contents($kf);
            if (is_string($bin) && strlen($bin) === SODIUM_CRYPTO_SECRETSTREAM_XCHACHA20POLY1305_KEYBYTES) {
                self::$cachedKey = $bin;
                return $bin;
            }
        }

        return null;
    }

    public static function requireMasterKey(): string
    {