Not able to add SSH Key in Jenkins Configuration

Question

I Have installed 'Publish Over SSH' plugin in Jenkins and would like to transfer few files to SSH Server after each Build .

I have generated the private key using puttygen with passphrase and have given the OpenSSH Public Key in 'authorization_keys' in SSH Server.

Using the generated private key and passphrase , I'm able to login to the SSH Server through PuTTY.

But in Jenkins I'm not able to add the SSH Key. Getting the below Error.

jenkins.plugins.publish_over.BapPublisherException: Failed to add SSH key. Message [The cipher 'aes256-cbc' is required, but it is not available.

Answer 1

Most of the tools (including Jenkins) support keys in OpenSSH format (generated using ssh-keygen), not in the PuTTY format (generated using PuTTYgen). Generate a new key using ssh-keygen or convert the PPK to OpenSSH format.

I wrote the following information in the SO Documentation.

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Convert PPK (PuTTY key) to OpenSSH format

You might receive from your peer private key in PPK format, which seems it does not work in OpenSSH (command-line ssh). The client will be asking for the passphrase, because of OpenSSH bug.

$ ssh -i mykey.ppk example.com
Enter passphrase for mykey.ppk:

You need to convert the key to OpenSSH format using PuTTYgen (command-line version):

puttygen mykey.ppk -o mykey.key -O private-openssh

Or in GUI version:

• Open PuttyGen
• Click Load
• Load your private key
• Go to Conversions->Export OpenSSH and export your private key
• Copy your private key to ~/.ssh/id_rsa

Source: SO answer, Unix SE answer