openssh unix dev - Oct 2004 - launch ssh-add with a passphrase as parameter

Hello,

I have the following problem.
I have an application which is running and which has already request a
passphrase to the user.

This application needs to launch ssh agent and ssh add, but I do not want
to be prompt again for the passphrase.
My private key is of course encrypted with the passphrase.

How can I do ?

My only idea for the moment is to change the variable value of
ask_passphrase and to redirect it to a program that I will write.
This program will request to my running application the passphrase.

Does anybody see a more simple way ?

Thank you by advance

Patrice

On Tue, Oct 19, 2004 at 02:22:30PM +0200, Patrice.Gonthier at alcatel.fr
wrote:
> Does anybody see a more simple way ?
Perhaps making your other application use ssh-agent is easier than
the other way around? I don't know..


//Peter

Patrice.Gonthier at alcatel.fr wrote:
> Hello,
> 
> I have the following problem.
> I have an application which is running and which has already request a
> passphrase to the user.
> 
> This application needs to launch ssh agent and ssh add, but I do not want
> to be prompt again for the passphrase.
> My private key is of course encrypted with the passphrase.
> 
> How can I do ?
Abuse SSH_ASKPASS:

cat > ~/.ssh/key-passphrase << EOF
your passphrase goes here
EOF
chmod 0600 .ssh/key-passphrase

cat > ~/.ssh/add-passphrase.sh << EOF
#!/bin/sh
cat ~/.ssh/key-passphrase << EOF
EOF
chmod 0700 ~/.ssh/add-passphrase.sh

DISPLAY=junk SSH_ASKPASS=~/.ssh/add-passphrase.sh ssh-add </dev/null