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Re: ssh public keys and pam



I am not an expert on SSH, but storing the public key in LDAP would only allow you to authenticate the machine against the stored key in LDAP. I am a little bit in the dark as to how you would authenticate the user this way, unless you had the user enter the passphrase used to create the public key and use that as the PAM_AUTHTOK value.

Perhaps some more information on it?

Daniel Jacober wrote:

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Jason

Yes that's exactly what I would like to do.
I would like to store the SSH public keys in an LDAP - Directory
instead of storing them locally.
Then I would like to authenticate against those keys. This way I could
control access to all our servers via LDAP.

I first tried to hack pam_ldap - module but I read about issues in a
newsgroup

http://www.opensolaris.org/jive/thread.jspa?threadID=614&tstart=15

Therefore I tried to make my own module. But I can't find a way to get
the public key into the pam-module. All I get is the password after
SSH pubkey authentication fails.

Any hint on this subject is greatly appreciated.

Regards Daniel

I don't have experience working with ssh keys, but with PAM and
LDAP. What exactly do you want to do? Use the SSH keys as
authentication or something?

Daniel Jacober wrote:

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Eric

Thanks for your hint, nevertheless I would like to get the public
key into the pam_module. Does anyone have experience with that?

Regards Daniel



Here's what I'm trying to do: I would like to store my public
keys centrally on an LDAP - Server and redirect public key
authentication with PAM to the LDAP - Server.


Sounds like you're looking for OpenSSH LDAP public key support.
There's a patch here:

http://www.opendarwin.org/projects/openssh-lpk/

- -Eric

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--
Jason Gerfen

"My girlfriend threated to
leave me if I went boarding...
I will miss her."
~ DIATRIBE aka FBITKK


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