openssh unix dev - Apr 2006 - automating ssh-keygen

I am trying to automate ssh-keygen creating keys without a passphrase.
 How can I run a script that calls ssh-keygen so that it does NOT
require a passphrase?  When I was testing on the command line I
created a file that contained 2 line feeds and piped it into stdin.  I
got a message mentioning that ssh-askpass could not be found and it
completed.  I did not try the keys but I would like to be able to
generate them without any error messages.  Is this possible?

thanks

--
What profits a man if he gains the whole world yet loses his soul?

Hi Doug--

On April 17, dlochart at gmail.com said:

 > I am trying to automate ssh-keygen creating keys without a
 > passphrase.

Modern versions of openssh's ssh-keygen allow you to specify a new
passphrase on the command line with the -N argument.  So:

  ssh-keygen -N '' -f ./newkey -t rsa -q

would make ./newkey (the passwordless, private key), and ./newkey.pub
(the public key).  It should return without errors in most normal
situations.  -q ("quiet") avoids printing the normal status messages
generated by ssh-keygen.

Please read the man page for ssh-keygen ("man ssh-keygen" or use the
web [0]) for more details.

hth,

	--dkg


[0] http://www.openbsd.org/cgi-bin/man.cgi?query=ssh-keygen

Doug Lochart wrote:
> I am trying to automate ssh-keygen creating keys without a passphrase.
> How can I run a script that calls ssh-keygen so that it does NOT
> require a passphrase?  When I was testing on the command line I
> created a file that contained 2 line feeds and piped it into stdin.  I
> got a message mentioning that ssh-askpass could not be found and it
> completed.
That didn't work because ssh-keygen reads its passphrases from its 
controlling terminal (or ssh-askpass) not stdin.
> I did not try the keys but I would like to be able to
> generate them without any error messages.  Is this possible?
$ ssh-keygen -N '' -f foo

-- 
Darren Tucker (dtucker at zip.com.au)
GPG key 8FF4FA69 / D9A3 86E9 7EEE AF4B B2D4  37C9 C982 80C7 8FF4 FA69
     Good judgement comes with experience. Unfortunately, the experience
usually comes from bad judgement.