Generate valid openssh ssh key under windows

I've some persons that are under windows, and they need a public/private RSA keys pair in order to get them authenticated to gistosis, a GIT server. We use SmartGit as our GIT GUI, and this tool require the private key to be in the format of OpenSSH.

Using puttyGen, I've been able to get a openssh public key, t开发者_开发问答hat is printed in the window, but not a private key. I can only save a private key using the Save button, and it save a format that is not like the one we have using the *nix tool.

How can we use windows tool in order to generate a VALID openssh compatible public and private key ?

Thanks.

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puttygen has a menu: Conversion -> Export OpenSSH Key That will save the private key to the openssh format.