Save public key in OpenSSH format

Question

The Save() method of SshPrivateKey allows you to select a format for the private key. Why doesn't the SavePublicKey() method let you select a format?

Thanks,

John Vottero

Answer 1

SshPrivateKey.SavePublicKey method only supports a single key format (Base64-encoded 'SSH2 PUBLIC KEY') at the moment. If you need to use other public key formats, please let us know which and we will happily add support or them!

Comments

I would like to be able to save the public key in the format that OpenSSH expects.

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Which part of OpenSSH do you mean? If you would like to use the key to authenticate to a server, you need to save a private key, not a public key. If you need a public key to be put into the user's ~/.ssh/authorized_keys file, use SshPrivateKey.GetPublicKey() method with the code from http://www.rebex.net/support/tutorial/sftp/default.aspx#key-generation to transform it into the desired format.

Answer 2

Since version 2013-R3, an overload of the SavePublicKey() method has been added:

SavePublicKey(string, SshPublicKeyFormat)    
SavePublicKey(Stream, SshPublicKeyFormat)

The following formats are supported by the SshPublicKeyFormat enum:

• Ssh2Base64 - Base64-encoded SSH2 public key format.
• Ssh2Raw - Raw SSH2 public key format.