parmiko problem

George Trojan george.trojan at noaa.gov
Mon Jul 19 16:06:59 EDT 2010


I have a problem with connecting to a host without specifying password 
(but with ssh keys configured correctly. That is

[tina src]$ sftp alice
Connecting to alice...
sftp>

works, but the code

import paramiko
paramiko.util.log_to_file('/tmp/paramiko')
t = paramiko.Transport(('alice', 22))
t.connect(username='gtrojan') # , password='a-passwd'])
sftp = paramiko.SFTPClient.from_transport(t)
sftp.close()
t.close()

results in the following output in /tmp/paramiko:

DEB [20100719-19:58:22.497] thr=1   paramiko.transport: starting thread 
(client mode): 0xb81e1150L
INF [20100719-19:58:22.501] thr=1   paramiko.transport: Connected 
(version 2.0, client OpenSSH_4.3)
DEB [20100719-19:58:22.502] thr=1   paramiko.transport: kex 
algos:['diffie-hellman-group-exchange-sha1', 
'diffie-hellman-group14-sha1', 'diffie-hellman-group1-sha1'] server 
key:['ssh-rsa', 'ssh-dss'] client encrypt:['aes128-cbc', '3des-cbc', 
'blowfish-cbc', 'cast128-cbc', 'arcfour128', 'arcfour256', 'arcfour', 
'aes192-cbc', 'aes256-cbc', 'rijndael-cbc at lysator.liu.se', 'aes128-ctr', 
'aes192-ctr', 'aes256-ctr'] server encrypt:['aes128-cbc', '3des-cbc', 
'blowfish-cbc', 'cast128-cbc', 'arcfour128', 'arcfour256', 'arcfour', 
'aes192-cbc', 'aes256-cbc', 'rijndael-cbc at lysator.liu.se', 'aes128-ctr', 
'aes192-ctr', 'aes256-ctr'] client mac:['hmac-md5', 'hmac-sha1', 
'hmac-ripemd160', 'hmac-ripemd160 at openssh.com', 'hmac-sha1-96', 
'hmac-md5-96'] server mac:['hmac-md5', 'hmac-sha1', 'hmac-ripemd160', 
'hmac-ripemd160 at openssh.com', 'hmac-sha1-96', 'hmac-md5-96'] client 
compress:['none', 'zlib at openssh.com'] server compress:['none', 
'zlib at openssh.com'] client lang:[''] server lang:[''] kex follows?False
DEB [20100719-19:58:22.502] thr=1   paramiko.transport: Ciphers agreed: 
local=aes128-ctr, remote=aes128-ctr
DEB [20100719-19:58:22.502] thr=1   paramiko.transport: using kex 
diffie-hellman-group1-sha1; server key type ssh-rsa; cipher: local 
aes128-ctr, remote aes128-ctr; mac: local hmac-sha1, remote hmac-sha1; 
compression: local none, remote none
DEB [20100719-19:58:22.571] thr=1   paramiko.transport: Switch to new 
keys ...
DEB [20100719-19:58:22.578] thr=2   paramiko.transport: [chan 1] Max 
packet in: 34816 bytes
WAR [20100719-19:58:22.611] thr=1   paramiko.transport: Oops, unhandled 
type 3
DEB [20100719-20:00:22.502] thr=1   paramiko.transport: EOF in transport 
thread

and a traceback in the terminal:

Traceback (most recent call last):
   File "./try.py", line 18, in <module>
     sftp = paramiko.SFTPClient.from_transport(t)
   File "build/bdist.linux-x86_64/egg/paramiko/sftp_client.py", line 
102, in from_transport
   File "build/bdist.linux-x86_64/egg/paramiko/transport.py", line 655, 
in open_session
   File "build/bdist.linux-x86_64/egg/paramiko/transport.py", line 745, 
in open_channel
EOFError

When the remove the comment on the connect() line and specify password 
the code works fine. Is this a bug, or I am missing something? I am 
running Python 2.6.3 on Centos 5.4.

George



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