从VirtualBox 6.1开始,扩展包强制要求SHA-256签名验证。 如果你用国内镜像站下载的“精简版”扩展包,或从非Oracle官网渠道获取的enigma virtual box定制包,签名验证会失败,导致 vboxmanage extpack install 命令返回“Invalid extension pack signature”错误。
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