Paramiko example using private key

paramiko_example.py

import paramiko
k = paramiko.RSAKey.from_private_key_file("/Users/whatever/Downloads/mykey.pem")
c = paramiko.SSHClient()
c.set_missing_host_key_policy(paramiko.AutoAddPolicy())
print "connecting"
c.connect( hostname = "www.acme.com", username = "ubuntu", pkey = k )
print "connected"
commands = [ "/home/ubuntu/firstscript.sh", "/home/ubuntu/secondscript.sh" ]
for command in commands:
	print "Executing {}".format( command )
	stdin , stdout, stderr = c.exec_command(command)
	print stdout.read()
	print( "Errors")
	print stderr.read()
c.close()

export the PPK file to a PEM format

I can't understand how works this code. I do this steps:

• run ssh-keygen -t rsa in server
• and then I copy the host's id_rsa to any txt file on the client(my computer)
• and then run this code(paramiko_example.py)

But I get error message which is

paramiko.ssh_exception.AuthenticationException: Authentication failed.

What is the thing I'm missing?

Hello guys,

I am facing the same issue like @arjunbhoot. I have a working ppk file via putty and filezilla. I tried to puttygen -> Conversions -> Export Open SSH Key and named the file as .pem but does not work. any ideas ?! last version paramiko , python 3.6

Works for me pretty nicely!

"Just a note, if you have generated your keys via puttygen and they are in ppk format, it's not going to work, go back to puttygen, load you ppk key and export it as OpenSSH (Conversion -> Export OpenSSH Key) and save it with .pem file."

:\python27\lib\site-packages\paramiko\client.pyc in _auth(self, username, password, pkey, key_filenames, allow_agent, look_for_keys, gss_auth, gss_kex, gss_deleg_creds, gss_host, passphrase)
712 # if we got an auth-failed exception earlier, re-raise it
713 if saved_exception is not None:
--> 714 raise saved_exception
715 raise SSHException('No authentication methods available')
716

AuthenticationException: Authentication failed.

Hai guys,
I am having a issue with connecting to the remote server .

import StringIO
import paramiko
ssh=paramiko.SSHclient()
f='C:\USers\Documents\private.ppk'
f=StringIO.StringIO(f)
mykey=Paramiko.RSAKey.from_private_key_file(f)
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect(198.168.2.1,root,pkey=mykey)
print"conneced "
ERROR:
COERCING TO UNICODE :need string or buffer , instance found

if any one know the reason let me know

@arjunbhoot did you ever resolve this?

@AymanEG figure this out?

Thank you, sir.

worked for me, after generating the key file in PEM format:

ssh-keygen -m pem -t rsa -C "test"

The new default format provided by ssh-keygen is still not supported apparently; see paramiko/paramiko#618

Thanks

error: raise TypeError("Expected unicode or bytes, got {!r}".format(s))
TypeError: Expected unicode or bytes, got <paramiko.rsakey.RSAKey object at 0x000002909C542D30>

use pythn3.7 and lasted paramiko.
Can someone help me?

not working
resulted error is "paramiko.ssh_exception.SSHException: not a valid RSA private key file"

there is my file data
---- BEGIN SSH2 PUBLIC KEY ----
Comment: "rsa-key-20111127"
AAAAB3NzaC1yc2EAAAABJQAAAIEAqAxgtgyVlblABlabLa
---- END SSH2 PUBLIC KEY ----

Please dont share any kind of keys although shown in comments

Thank you so much for providing this example!

I found this link useful: https://adamdehaven.com/blog/how-to-generate-an-ssh-key-and-add-your-public-key-to-the-server-for-authentication/
Added the key id_rsa to ssh-agent, and
In python code: ssh.connect(hostname, username=myuser, look_for_keys=True, allow_agent=True)
got rid of this errror. hope this helps.

update paramiko to latest version and then it will work even with you new OPENSSH key format

@alexanderfournier make ssh key on computer, authorise on server, use key in program

Error:

File "/usr/lib/python3.6/site-packages/paramiko/pkey.py", line 289, in _read_private_key
raise SSHException("not a valid " + tag + " private key file")
paramiko.ssh_exception.SSHException: not a valid RSA private key file

it worked for me when I created key with type RSA

ssh-keygen -m pem -t rsa

moreover in python3.8 print statement will not work the way it is mentioned above. Also changed from read to readlines and created a loop

xlist = (stdout.readlines())
for i in xlist:
print(i)
print("++++++++++++++++")

Nothing else need to be changed.

Just a note, if you have generated your keys via puttygen and they are in ppk format, it's not going to work, go back to puttygen, load you ppk key and export it as OpenSSH (Conversion -> Export OpenSSH Key)

Hi, I've converted the file to OpenSSH (with puttygen)
but now if I use pkey = pk.RSAKey.from_private_key_file(key_filename)
On the connect I got

Authentication failed

If I use the filename
ssh.connect(hostname=ip_server, username=username, key_filename=key_filename)
I got

 raise ValueError("q must be exactly 160, 224, or 256 bits long")

ValueError: q must be exactly 160, 224, or 256 bits long

Just a note, if you have generated your keys via puttygen and they are in ppk format, it's not going to work, go back to puttygen, load you ppk key and export it as OpenSSH (Conversion -> Export OpenSSH Key)

Worked perfectly for me. Thanks a lot!

Not working for me

Traceback (most recent call last):
File "/opt/cms/scripts/bam_sdrtrace.py", line 227, in
transfer_file1()
File "/opt/cms/scripts/bam_sdrtrace.py", line 148, in transfer_file1
k = paramiko.RSAKey.from_private_key_file("/home/esbc/.ssh/authorized_keys")
File "/usr/lib/python2.7/site-packages/paramiko/pkey.py", line 196, in from_private_key_file
key = cls(filename=filename, password=password)
File "/usr/lib/python2.7/site-packages/paramiko/rsakey.py", line 45, in init
self._from_private_key_file(filename, password)
File "/usr/lib/python2.7/site-packages/paramiko/rsakey.py", line 163, in _from_private_key_file
data = self._read_private_key_file('RSA', filename, password)
File "/usr/lib/python2.7/site-packages/paramiko/pkey.py", line 268, in _read_private_key_file
data = self._read_private_key(tag, f, password)
File "/usr/lib/python2.7/site-packages/paramiko/pkey.py", line 277, in _read_private_key
raise SSHException('not a valid ' + tag + ' private key file')
paramiko.ssh_exception.SSHException: not a valid RSA private key file

socket.py", line 918, in getaddrinfo for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno 11001] getaddrinfo failed
what's wrong

Not working for me, while use the key using ssh client it works

Traceback (most recent call last):
File "/Users/xx/code/compute-ops/scripts/launch_intance_benchmark.py", line 105, in
k = paramiko.RSAKey.from_private_key_file("/Users/xx/.ssh/id_rsa.pem")
File "/Users/xx/code/compute-ops/venv3/lib/python3.7/site-packages/paramiko/pkey.py", line 206, in from_private_key_file
key = cls(filename=filename, password=password)
File "/Users/xx/code/compute-ops/venv3/lib/python3.7/site-packages/paramiko/rsakey.py", line 48, in init
self._from_private_key_file(filename, password)
File "/Users/xx/code/compute-ops/venv3/lib/python3.7/site-packages/paramiko/rsakey.py", line 169, in _from_private_key_file
data = self._read_private_key_file('RSA', filename, password)
File "/Users/xx/code/compute-ops/venv3/lib/python3.7/site-packages/paramiko/pkey.py", line 279, in _read_private_key_file
data = self._read_private_key(tag, f, password)
File "/Users/xx/code/compute-ops/venv3/lib/python3.7/site-packages/paramiko/pkey.py", line 289, in _read_private_key
raise SSHException('not a valid ' + tag + ' private key file')
paramiko.ssh_exception.SSHException: not a valid RSA private key file

Converting the key
resolves the error
ssh-keygen -p -m PEM -f ~/.ssh/id_rsa

thanks.
if your private key is in .ppk, you need convert to .pem.

I resolve this problem with version paramiko-2.10.4

I see this error:

ModuleNotFoundError: No module named 'paramiko'