How to ssh connect through python Paramiko with ppk public key
PythonSshPuttyParamikoPublic KeyPython Problem Overview
i'm using Paramiko to connect through ssh to a server.
Basic authentication works well, but i can't understand how to connect with public key.
When i connect with putty, the server tell me this:
Using username "root".
Authenticating with public key "[email protected]"
Passphrase for key "[email protected]": [i've inserted the passphrase here]
Last login: Mon Dec 5 09:25:18 2011 from ...
I connect to it with this ppk file:
PuTTY-User-Key-File-2: ssh-rsa
Encryption: aes256-cbc
Comment: rsa-key@dddd.com
Public-Lines: 4
[4 lines key]
Private-Lines: 8
[8 lines key]
Private-MAC: [hash]
With basic auth the error i get (from the log) is:
DEB [20111205-09:48:44.328] thr=1 paramiko.transport: userauth is OK
DEB [20111205-09:48:44.927] thr=1 paramiko.transport: Authentication type (password) not permitted.
DEB [20111205-09:48:44.927] thr=1 paramiko.transport: Allowed methods: ['publickey', 'gssapi-with-mic']
I've tried to include that ppk file and set to auth_public_key, but didn't work.
Can you help me?
Python Solutions
Solution 1 - Python
Ok @Adam and @Kimvais were right, Paramiko cannot parse .ppk files.
So the way to go (thanks to @JimB too) is to convert .ppk file to OpenSSH private key format; this can be achieved using PuTTYgen as described here.
Then it's very simple getting connected with it:
import paramiko
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect('<hostname>', username='<username>', password='<password>', key_filename='<path/to/openssh-private-key-file>')
stdin, stdout, stderr = ssh.exec_command('ls')
print stdout.readlines()
ssh.close()
Solution 2 - Python
For me I doing this:
import paramiko
hostname = 'my hostname or IP'
myuser = 'the user to ssh connect'
mySSHK = '/path/to/sshkey.pub'
sshcon = paramiko.SSHClient() # will create the object
sshcon.set_missing_host_key_policy(paramiko.AutoAddPolicy()) # no known_hosts error
sshcon.connect(hostname, username=myuser, key_filename=mySSHK) # no passwd needed
works for me pretty ok
Solution 3 - Python
To create a valid DSA format private key supported by Paramiko in Puttygen.
Click on Conversions then Export OpenSSH Key
Solution 4 - Python
@VonC's answer to (deleted) duplicate question:
> If, as commented, Paraminko does not support PPK key, the official solution, as seen here, would be to use PuTTYgen.
>
> But you can also use the Python library CkSshKey to make that same conversion directly in your program.
>
> See "Convert PuTTY Private Key (ppk) to OpenSSH (pem)"
>
> python > import sys > import chilkat > > key = chilkat.CkSshKey() > > # Load an unencrypted or encrypted PuTTY private key. > > # If your PuTTY private key is encrypted, set the Password > # property before calling FromPuttyPrivateKey. > # If your PuTTY private key is not encrypted, it makes no diffference > # if Password is set or not set. > key.put_Password("secret") > > # First load the .ppk file into a string: > > keyStr = key.loadText("putty_private_key.ppk") > > # Import into the SSH key object: > success = key.FromPuttyPrivateKey(keyStr) > if (success != True): > print(key.lastErrorText()) > sys.exit() > > # Convert to an encrypted or unencrypted OpenSSH key. > > # First demonstrate converting to an unencrypted OpenSSH key > > bEncrypt = False > unencryptedKeyStr = key.toOpenSshPrivateKey(bEncrypt) > success = key.SaveText(unencryptedKeyStr,"unencrypted_openssh.pem") > if (success != True): > print(key.lastErrorText()) > sys.exit() >