SSH keypair not working for Jenkins CLI

[Eric Fetzer]

I am attempting to connect into Jenkins via id_rsa/id_rsa.pub.  My keys are obviously good because I do this all over the place with ssh.  Jenkins-cli.jar seems a bit confused to me.  Please take a look at my output:

$ /cygdrive/c/Java/bin/java -jar jenkins-cli.jar -s http://myserver:8080/ -i /home/efetzer/.ssh/id_rsa who-am-i
No such file exists: \home\efetzer\.ssh\id_rsa
Jenkins CLI
Usage: java -jar jenkins-cli.jar [-s URL] command [opts...] args...
Options:
-s URL       : the server URL (defaults to the JENKINS_URL env var)
-i KEY       : SSH private key file used for authentication
-p HOST:PORT : HTTP proxy host and port for HTTPS proxy tunneling. See http://jenkins-ci.org/https-proxy-tunnel
-noCertificateCheck : bypass HTTPS certificate check entirely. Use with caution
-noKeyAuth   : dont try to load the SSH authentication private key. Conflicts with -i

The available commands depend on the server. Run the help command to
see the list.

$ ls /home/efetzer/.ssh
id_rsa  id_rsa.pub  known_hosts

It appears as though Jenkins-cli.jar windowafied my directory seperators.  It's true I'm on a winders box, but running in Cygwin.  Any help would be appreciated.

Thanks,

Eric

[Victor Martinez]

Have you tried with the full path where you have your cygwin installation, lets assume your installation is based on /cygdrive/c/cygwin then your full home path should be something like:

/cygdrive/c/cygwin/home/efetzer

[Eric Fetzer]

OK, answering my own question because I've been hammering at it.  The only thing that seems to work is to use a completely relative path:

$ /cygdrive/c/Java/bin/java -jar jenkins-cli.jar -s http://myserver:8080/ -i ../.ssh/id_rsa who-am-i
Authenticated as: efetzer

...

Anyone with a clue as to why?  Maybe this won't be an issue once I move to the Linux box I will be using in the real world...

[Eric Fetzer]

Just tried Victor, no such luck:

$ /cygdrive/c/Java/bin/java -jar jenkins-cli.jar -s http://myserver:8080/ -i /cygdrive/c/CYGWIN/home/efetzer/.ssh/id_rsa who-am-i
No such file exists: \cygdrive\c\CYGWIN\home\efetzer\.ssh\id_rsa

Jenkins CLI
Usage: java -jar jenkins-cli.jar [-s URL] command [opts...] args...
Options:
-s URL       : the server URL (defaults to the JENKINS_URL env var)
-i KEY       : SSH private key file used for authentication
-p HOST:PORT : HTTP proxy host and port for HTTPS proxy tunneling. See http://jenkins-ci.org/https-proxy-tunnel
-noCertificateCheck : bypass HTTPS certificate check entirely. Use with caution
-noKeyAuth   : dont try to load the SSH authentication private key. Conflicts with -i

The available commands depend on the server. Run the help command to
see the list.

$ ls /cygdrive/c/CYGWIN/home/efetzer/.ssh
id_rsa  id_rsa.pub  known_hosts

[Benjamin Lau]

notice how the directory separator characters are being switched from
/ to \. My guess is that if you used
C:\\cygwin\\home\\efetzer\\.ssh\\id_rsa it might work the way you
expect. The java binary you're using isn't aware of what cygwin is
doing with paths and such so my guess is that it's behaving like any
other windows executable in this context.

Cheers,
Ben

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[Eric Fetzer]

Ahhh, you got it Ben!  That did it.  Thanks!  Something to note for CYGWIN usage with CLI...