请问 SSH 用 FIDO2 设备的时候生成的私钥是指向设备的链接，还是真正的私钥？ - V2EX
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BloodBlade

请问 SSH 用 FIDO2 设备的时候生成的私钥是指向设备的链接，还是真正的私钥？

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  •   BloodBlade Dec 4, 2021 2201 views
    This topic created in 1635 days ago, the information mentioned may be changed or developed.
    如果是真正的私钥，有没有办法导入另一个 FIDO2 设备作为备份？
    如果只是链接，那只能在另一个 FIDO2 设备上生成新的密钥来备份吗？
  • 私钥
  • fido2
  • 备份
  • 设备
    2 replies    2021-12-04 17:11:57 +08:00
    dingwen07
        1
    dingwen07  
       Dec 4, 2021
    有两种方式，一种是 Resident Key （现在似乎改名成了 Discoverable Credential ），这种的话密钥是存储在 FIDO 设备内部，通过 ssh-add -K 导入 agent 。另外一种大概是私钥存储在本地的文件，需要使用 FIDO 设备解密。

    任何一种方式都不能导出、备份私钥（标准 FIDO 设备，OnlyKey 这种可以整机备份的除外）
    BloodBlade
        2
    BloodBlade  
    OP
       Dec 4, 2021
    @dingwen07 明白了，看样子只能生成第二对密钥来备份了
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