Can't you generate a public key from a private one easily? | Hacker News

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		skeletonjelly on July 25, 2013 \| parent \| context \| favorite \| on: More Git and GitHub Secrets Can't you generate a public key from a private one easily?

gbaygon on July 25, 2013 [–]

Yes:

  ssh-keygen -y -f private_key.pem > public_key.pub

emmelaich on July 25, 2013 | [–]

Yes and no. It extracts the public key from the private key file. The "private" key file includes both keys.

The public key file doesn't.

dlitz on July 26, 2013 | | [–]

> The "private" key file includes both keys.

It wouldn't need to, though. Given the private key (n,d), the public key is probably (n,65537).

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