![]() The client public key must be stored in a location that is accessible by the SSH server to authenticate the server by the client conversely, the server public key must be placed on the client side to authenticate the client by the server. The public can key can be freely shared with anyone to autenticate another party, while the private key must be kept secret. The public key encrypts messages that can only be decrypted by the private key. Assymetric encryption requires two associated keys, the private key and the public key. In symmetric key cryptography, a single key is used by the sending and receiving parties to encrypt and decrypt messages. To secure the transmitted data, SSH employs forms of symmetric encryption, assymetric encryption, and hashing. The client and server authenticate each other and pass commands and output back and forth. SSH uses client-server architecture, connecting an SSH client with an SSH server. Secure Shell (SSH) is cryptographic network protocol for secure remote login, command execution and file transfer over untrusted networks. This section discusses how to connect to AzureSynapseAnalytics through SSH. Local_bind_address=('0.0.0.Connecting to AzureSynapseAnalytics Using SSH Remote_bind_address=('remote_host', remote_ssh_port), # remote_server ('jump_server_host', jump_ssh_port), # jump server Now, it works without Exception ValueError: No password or public key available!. MIIEpAIBAAKCAQEAuFSEXjLMwyAJ54d5hQQjyIE+4l5pZw7GuYFDgNCzXjl6CNwVĬopy it to my local mac, and test it. ![]() Now the ~/.ssh/id_rsa on my linux OS looks like: -BEGIN RSA PRIVATE KEY. Ssh-copy-id -i ~/.ssh/id_rsa.pub -p ssh_port I authorize access to the key with ssh-copy-id -i ~/.ssh/id_rsa.pub -p ssh_port. So, I generate a new key in a linux OS, with command of ssh-keygen -t rsa, then # raise SSHException: not a valid RSA private key file # id_rsa with `-BEGIN OPENSSH PRIVATE KEY-` ![]() The key is a, that means, the ~/.ssh/id_rsa should be convert to paramiko.pkey correctly. **Private** key file name (``str``) to obtain the public keyįrom or a **public** key (:class:``) According to the source code of sshtunnel model: ssh_pkey (str or paramiko.PKey): In fact, the ssh_pkey should be started with -BEGIN RSA PRIVATE KEY. In my case, my macOS ~/.ssh/id_rsa start with -BEGIN OPENSSH PRIVATE KEY- which is not the proper start line. What might be happening here? Am I misunderstanding something about the expected arguments for SSHTunnelForwarder? Something more fundamental about the key and password? This happens whether ssh_pkey is pointing to the public key or the private key. If I run the code without having already logged into the server at some point earlier, I receive this error: ValueError: No password or public key available! (But the password is there - ssh_private_key_password - no?) If I log into "my.server" separately and enter my private key password in the dialog for storage by ssh-agent, and then run the code above, it works as expected. Everything is working fine, except that sshtunnel doesn't seem to recognize my ssh_private_key_password unless I've already entered it elsewhere (or more likely I'm making a mistake when providing it). I'm using sshtunnel to connect to connect to a remote server and on to a database from there.
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