Again quoting whole text...
Michael H. Warfield, on July 17. 2000, wrote:
: On Mon, Jul 17, 2000 at 07:26:20AM -0700, [EMAIL PROTECTED] wrote:
: > Just do this as the user:
:
: > In SSH1:
: > $ rm ~/.ssh/identity*
: > $ ssh-keygen
:
: > In SSH2:
: > $ rm ~/.ssh2/id_dsa_1024_a*
: > $ ssh-keygen2
:
: :-)
:
: Somehow, I don't think that was quite what he was asking. I think
: what he was asking for was how to recover the public key, given the private
: key. I was thinking that OpenSSH had an option in ssh-keygen for doing
: something like this, but I can't find it now. It has some translation
: options for key formats, but that's about it.
:
: The only reason I can see for doing this is where you have
: distributed your public key and then accidently deleted or corrupted
: your public key. For that, I would say just extract back the public
: key from one of the systems that have it in an authorize_keys file on
: in a known_hosts file.
:
: Mathmatically, it should be real easy. Just read the private key
: and feed it back into the algorithm to regenerate the public key. For
: RSA keys, the two primes and the private modulus were saved in the
: private key, so you have everything you need. I'm not totally sure there
: is a sufficient reason for needing that functionality, though.
Our cryptographer Mika Kojo implemented this for ssh-keygen2. This
modification will appear in the next release. He implemented it for
debug purposes, and I don't know if it actually works, but what the
hell :)
: > On Fri, Jul 14, 2000 at 04:49:28PM -0400, Jeremy Hansen wrote:
: > >
: > >
: > > I need to regenerate my public key from an identity file, how do I do
: > > this? I assume it somehow possible as long as I have the secret key and
: > > passphrase.
: > >
: > > Thanks
: > > -jeremy
: > >
: > -------------------------------------------------------------------------
: > Anne Carasik | Economists state their GNP growth
: > Principal Consultant | projections to the nearest tenth of
: > SSH Communications Security, Inc. | a percentage point to prove they have
: > Email: [EMAIL PROTECTED] | a sense of humor. -Edgar R. Fiedler
: > -------------------------------------------------------------------------
: > Unless stated otherwise above, the opinions expressed herein are my own,
: > not of my employer.
:
: --
: Michael H. Warfield | (770) 985-6132 | [EMAIL PROTECTED]
: (The Mad Wizard) | (770) 331-2437 | http://www.wittsend.com/mhw/
: NIC whois: MHW9 | An optimist believes we live in the best of all
: PGP Key: 0xDF1DD471 | possible worlds. A pessimist is sure of it!
--
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