![]() The file will look like this: -BEGIN RSA PUBLIC KEY. But I have it in my notes I've collated over the years and I'll include it here for wholesome goodness. To be honest, I don't know what this key is used for as I haven't needed it. Bonus: The PKCS#1 PEM-encoded Public Key Format Now that you have an OpenSSH Private Key, you can use the ssh-keygen tool as above to perform manipulations on the key. Save the file as id_rsa (without an extension).On the menu bar, click "Conversions" > "Export OpenSSH key".On the menu bar, click "File" > "Load private key".If you only have the PUTTY Private Key ( id_rsa.ppk file), you will need to convert it first. If you have your OpenSSH Private Key ( id_rsa file), you can generate the OpenSSH Public Key File using: ssh-keygen -f ~/.ssh/id_rsa -y > ~/.ssh/id_rsa.pub If you are making use of ssh-agent, you will likely also have access to ssh-keygen. The format of the key is simply ssh-rsa and can be created by rearranging the SSH-2 formatted file. To save it as a file, you have to manually copy it from the text box and paste it into a new text file.įor the key shown above, this would be: ssh-rsa AAAAB3NzaC1yc2EAAAABJQAAAQEAhl/CNy9wI1GVdiHAJQV0CkHnMEqW7+Si9WYFi2fSBrsGcmqeb5EwgnhmTcPgtM5ptGBjUZR84nxjZ8SPmnLDiDyHDPIsmwLBHxcppY0fhRSGtWL5fT8DGm9EfXaO1QN8c31VU/IkD8niWA6NmHNE1qEqpph3DznVzIm3oMrongEjGw7sDP48ZTZp2saYVAKEEuGC1YYcQ1g20yESzo7aP70ZeHmQqI9nTyEAip3mL20+qHNsHfW8hJAchaUN8CwNQABJaOozYijiIUgdbtSTMRDYPi7fjhgB3bA9tBjh7cOyuU/c4M4D6o2mAVYdLAWMBkSoLG8Oel6TCcfpO/nElw= github-example-key However it is generated and shown in the text box titled "Public key for pasting into OpenSSH authorized_keys file". TBjh7cOyuU/c4M4D6o2mAVYdLAWMBkSoLG8Oel6TCcfpO/nElw=Ĭontrary to popular belief, this format doesn't get saved by the generator. Ip3mL20+qHNsHfW8hJAchaUN8CwNQABJaOozYijiIUgdbtSTMRDYPi7fjhgB3bA9 OMrongEjGw7sDP48ZTZp2saYVAKEEuGC1YYcQ1g20yESzo7aP70ZeHmQqI9nTyEA PY0fhRSGtWL5fT8DGm9EfXaO1QN8c31VU/IkD8niWA6NmHNE1qEqpph3DznVzIm3 ![]() I2fSBrsGcmqeb5EwgnhmTcPgtM5ptGBjUZR84nxjZ8SPmnLDiDyHDPIsmwLBHxcp When you save a key using the PuTTY Key Generator using the "Save public key" button, it will be saved in the format defined by RFC 4716.ĪAAAB3NzaC1yc2EAAAABJQAAAQEAhl/CNy9wI1GVdiHAJQV0CkHnMEqW7+Si9WYF ![]() Link to the relevant PuTTY documentation SSH-2 Adjust these details to suit your needs as desired. Furthermore, for copy-paste convenience, the parent folder of the keys will be assumed to be ~/.ssh/. Note: Throughout my explanation, the key files I will be using/generating will be named id_rsa with their appropriate extensions. It simply boils down to the fact that the PuTTY Key Generator generates two different public key formats depending on what you do in the program. However, I can also elaborate and answer why the warning is there. As Roland mentioned in their answer, it's a warning that the ssh-agent doesn't understand the format of the public key and even then, the public key will not be used locally. ![]()
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