corp-ssh-helper-helper is a helper tool to interact with DUTs (DUT stands for Device under test) from inside the ChromiumOS SDK chroot where corp-ssh-helper is not available.
If you have installed a similar tool (e.g. go/old-corp-ssh-helper-helper), please remember to uninstall it before using this.
Namely, there should be nothing existing at /usr/bin/corp-ssh-helper in your ChromiumOS SDK chroot. Also src/scripts/.local_mounts shouldn't contain /usr/bin/corp-ssh-helper.
(inside the chroot) $ ls /usr/bin/corp-ssh-helper # This should fail (inside the chroot) $ grep /usr/bin/corp-ssh-helper ~/chromiumos/src/scripts/.local_mounts # This shouldn't match with any line
To install corp-ssh-helper-helper, mount the corp-ssh-helper-helper-client.py file as /usr/bin/corp-ssh-helper inside the ChromiumOS SDK chroot.
To do this, run the following command outside the chroot.
(outside the chroot) $ echo $HOME/chromiumos/src/platform/dev/contrib/corp-ssh-helper-helper/corp-ssh-helper-helper-client.py /usr/bin/corp-ssh-helper >> ~/chromiumos/src/scripts/.local_mounts
If you are lucky, you don't have to do anything, as cros_sdk copies ~/.ssh/config outside the chroot when entering the chroot, and your config file may contain the required ProxyCommand setup. Otherwise, you need to create ~/.ssh/config inside the chroot, and the following is to use the helper for $DUT (replace $DUT with an IP address or a host name).
You may also need to copy your testing_rsa or partner_testing_rsa keys from outside of the chroot to inside of the chroot, in the ~/.ssh directory. More information on these keys is available at http://go/chromeos-lab-duts-ssh#setup-private-key-and-ssh-config.
To ensure that this config is persistent every time you enter the chroot, be sure to add this in the ssh-config OUTSIDE the chroot, then re-enter the chroot to confirm that the ssh config in your chroot updated properly.
Host $DUT ProxyCommand corp-ssh-helper %h %p
See http://go/arc-corp-ssh-helper-notes and http://go/chromeos-lab-duts-ssh to learn more.
To use corp-ssh-helper-helper, you need to start the server outside the chroot.
(outside the chroot) ~/chromiumos$ src/platform/dev/contrib/corp-ssh-helper-helper/corp-ssh-helper-helper-server.py
After starting the server, you can use SSH in the same way as you do outside the chroot. The client script will automatically forward the connection request to the server running outside the chroot.
(inside the chroot) $ ssh $DUT
The same goes for tools like tast run and cros deploy.
You can uninstall this tool by deleting /usr/bin/corp-ssh-helper and ~/chromiumos/corp-ssh-helper-helper.sock inside the chroot.
(inside the chroot) $ sudo rm /usr/bin/corp-ssh-helper ~/chromiumos/.corp-ssh-helper-helper.sock