shell 如何读/写SSH私钥(id_rsa)

v8wbuo2f  于 2023-01-31  发布在  Shell
关注(0)|答案(2)|浏览(374)

作为自动化CloudInit设置的一部分,我会自动为用户生成公钥/私钥,从文件中阅读它们,然后将它们保存在bash变量中,如下所示

public_key=$(cat /path/to/id_rsa.pub)
private_key=$(cat /path/to/id_rsa)

然后,我通过Cloud Init将它们写入目标计算机,如下所示

- sudo -H -u aryan bash -c 'echo "$public_key" > ~/.ssh/id_rsa.pub'
- sudo -H -u aryan bash -c 'echo "$private_key" > ~/.ssh/id_rsa'

公钥写得正确,但是私钥写在一行中,然后SSH抱怨它的格式错误。

-----BEGIN RSA PRIVATE KEY-----                                                                 
 MIICXAIBAAKBgQCpOipW5Xyjc9jLE6AX/0HktpZtyokJap9k5njJl3uw7VpcUITW               
 3UzHHZor4b4N1x8wp17Y0udPsrcPtfJR+pVSr0s6ZMkjX0B7J5jE64iPlVOkO+ww               
 b4CMlonViWeTJ/+gSLkfC2EDfSqPTEOWx44Vs7Mt2qi5Rvq/Po81NDrK2QIDAQAB               
 AoGAcklZ9r2dYzYFn4BtikdVVQUKqrMxwS5E33vW7y5i1qY1dErcq89g3shbKm+W               
 TvqNkeo23+/vT5++idmzATJeTQ+uhRidPrU6XTWd4I8LvHB6dYIGKpGuciv4NWG0               
 3CLDt5IRLpAJ8qAl3tmitWadZw7lJtGAWg+7zdbIoP07XhECQQD32vBAwePlB/ZY               
 CsRNeIDUWtAGaxqBvssmbh4wfCYZDH+3BJbyMG0AWycE0YLZLlACKzTUu5PC8CKu               
 zQBKb02LAkEArsnGdJ7ipDTZZWl1Q42M494SfQUA9+he12WU6O2o2BJqr8cVRG2V               
 BJHHXvdHB+xWRMpo0vxTiGdDIDqPwfPdqwJBAMBpkgvjuYSqur48lYpC21h/q3Dg               
 IrLIqDMMV5lyN61Ie7lb8cbQez5EhTUDZN4vSuN0IU5o1FwIShSDhw9B+uMCQFwN               
 UiJLJ0uZtcCOCL76BnBfnVcQUpE9ZO2FxyXhPGIHWP6YF6BBIhEVAW4HRvZqRojW               
 HNy5HPkigRyxGtLnrx8CQFWZtrGiBIrYRsrf9fwXv4DTB5z7sQLEf8x2dwvif34O               
 +bYMoDJPewr3ti88KJP4rubmIS9PTCAJxEfMBPkZHvE=                                   
 -----END RSA PRIVATE KEY-----

但是我有这个(截断)

-----BEGIN RSA PRIVATE KEY-----MIICXAIBAAKBgQCpOipW5Xyjc9jLE6AX/0HktpZtyokJ...

**问题:**如何正确地将私钥读入变量,然后将其写入文本文件
**注意:**最简单的方法是复制文件,但我认为Cloudinit不支持cp/scp。如果支持,请告诉我如何操作

txu3uszq

txu3uszq1#

您需要将 command substitution 引起来以保留换行符:

private_key="$(cat /path/to/id_rsa)"
wfveoks0

wfveoks02#

对于cloud-init ssh设置,你可以在部署之前生成私钥和公钥,然后使用cloud-init用这些ssh密钥部署服务器。这样,你的计算机上将总是有相同的私钥,并且能够ssh到新的服务器。如果错误的人访问cloud-config文件,也可能是一个安全问题
样本代码:

ssh_authorized_keys:
  - ssh-rsa AAA... user@server
ssh_keys:
  rsa_private: |
    -----BEGIN RSA PRIVATE KEY-----
    MIIEpwIBAAKCAQIA3FurAzWIiBuNd1ew2sM3s/eOg+Sf9nSQPcEzNyNTkhxSwkxf
    3fgNlSpoBc1s7XD9DefpzGT/lxZzVQcQGJ7NnxddRKOH8Uhhp75L3Q18L4z4bZNM
    zX5ngtZopa4SoFWiMCVljXeWy4CpuQdpD8N9Bpb+9IYCVOzitnrD2UM2ubf6imOq
    Saeiyi3/SdftcUO3uhjemLkg9d2nwvfbJUqSFR4NGR5nsOxxMC4tnxylDRN88qE3
    fSrSQHY+qTu+3mKQ6J7VKUM7e0jRD/vQK64V0f6AqKLxta7XFeA8sIa0qbGNQHBk
    Zg+OOFYUz4x0qbwmwuQR9RS6HnBLXvdcZb36nXkCAwEAAQKCAQEfx+jGMbZbSv4A
    NFmBc55ZCl83joWzmeQjw/WLAkFPVV5qP3GkJd5voQoXrCUFqcIVe1kw7XAfblF7
    9eTQaDbntwrwl1VH61SKSNvQKd27Tf2WgCQXjx+Gsz2sh4qQLUmTABHBcXoCJ7BS
    y0rPxzYE+UoUIi+7595ayyHr99Gwv1/N78xw7PS+oyxmn4rsbFYfWbkKWKgbizAm
    oxM5EE1g1Mn9m0ocruYzTiPIHLGMsfeqMDzHG7lK0rTL0nqFP/QegZkSE0hQ/fJm
    gS44NnFQ1HeQB3GCbgJlQFNVNHPueZevEemZ5QEuPIhYmG8+GlGRl9aFto9BGDa7
    z0Ct29HeAQKBgQ95Z86CIZIsSWhjt0ZjW0DzFd6JQC+gKxmxcaELZPL+M0jh2zMV
    9jCIPERV4RKwzttKm/tGz2Zh+FsToi0Ie1TW4uVArGcFeX+XsTIrcIyIwzoFixR1
    k2Rv9ZwJGQgapTokhoVidAMRUIZfN/2HH4y2ZnIdOUDpP8FpknFiTXFoEQKBgQ49
    hWHFwKFB6sprKq+dJkFgNEhtdn4q0K5NrBgwHm6h2sO3tyIwVMCmhwHtBnEQOovg
    W7dM/GYqpxE76qaJBoHFht0RGPxt1wbQRbjwZ78KdMrLa+RZlFRVdPU5QXEcYu+H
    jqIiTf/aDl69cdQ8dkJoGwjjT80R4t2zy+7iKqqG6QKBgQbqYhsniytRgYkWr2zU
    sI6pVMe3nSPrt/dmlvq7JeV296Kf1bnSAdGUwSJlIw6AWCInCOjWr4/5Ds5dSuhH
    Vx8GXibIrYPpLXB5caaTRVx5Lo66tXpyRWnoo2KVqks15UvD0R7BbkmErnEvEs3K
    Wq4/Qi+Toe3Blk2xCdKEdUnOkQKfgQLZXC5LmlapEYieGFQ6ZMT/snYrMGHdvxKg
    h6XvOqd3yoUN5J36fXpt1uUTvw4v6QbDRJZP2M+4COTxz+ix0ZN1KZ5hJVabw0Gh
    udFeh+M4/FT2jgeJxJt63YOSiP1QaJrzzB20L1bZEbbywCtuTVrL6VzF3dlxkqo4
    pryMk2y6wQKBgQ3MpmrMTRS3bA7h6qMvaZep6Pke6gsXSgGpbU9mFB2ja8IKIVLZ
    iVLjmcN1ItqKtYbD01WURkcV3ne+E9bbDYrBQmPDfaO+VbUgBVTjmybLpamrci5k
    DcDQVCymHy0EwAqGOuWKM8EgbxuTKDGuUX9Q0TI23fwTc9rB6j3FEAnyvQ==
    -----END RSA PRIVATE KEY-----

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