105 lines
2.7 KiB
Python
105 lines
2.7 KiB
Python
#!/usr/bin/python
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# This demo is like demo_simple.py, but it doesn't try to use select()
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# to poll the ssh channel for reading, so it can be used on Windows.
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# It logs into a shell, executes "ls", prints out the results, and
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# exits.
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import sys, os, base64, getpass, socket, traceback
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import paramiko
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##### utility functions
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def load_host_keys():
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filename = os.environ['HOME'] + '/.ssh/known_hosts'
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keys = {}
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try:
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f = open(filename, 'r')
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except Exception, e:
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print '*** Unable to open host keys file (%s)' % filename
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return
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for line in f:
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keylist = line.split(' ')
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if len(keylist) != 3:
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continue
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hostlist, keytype, key = keylist
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hosts = hostlist.split(',')
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for host in hosts:
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if not keys.has_key(host):
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keys[host] = {}
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if keytype == 'ssh-rsa':
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keys[host][keytype] = paramiko.RSAKey(data=base64.decodestring(key))
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elif keytype == 'ssh-dss':
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keys[host][keytype] = paramiko.DSSKey(data=base64.decodestring(key))
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f.close()
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return keys
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# setup logging
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paramiko.util.log_to_file('demo.log')
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# get hostname
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username = ''
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if len(sys.argv) > 1:
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hostname = sys.argv[1]
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if hostname.find('@') >= 0:
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username, hostname = hostname.split('@')
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else:
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hostname = raw_input('Hostname: ')
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if len(hostname) == 0:
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print '*** Hostname required.'
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sys.exit(1)
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port = 22
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if hostname.find(':') >= 0:
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hostname, portstr = hostname.split(':')
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port = int(portstr)
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# get username
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if username == '':
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default_username = getpass.getuser()
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username = raw_input('Username [%s]: ' % default_username)
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if len(username) == 0:
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username = default_username
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password = getpass.getpass('Password for %s@%s: ' % (username, hostname))
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# get host key, if we know one
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hostkeytype = None
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hostkey = None
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hkeys = load_host_keys()
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if hkeys.has_key(hostname):
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hostkeytype = hkeys[hostname].keys()[0]
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hostkey = hkeys[hostname][hostkeytype]
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print 'Using host key of type %s' % hostkeytype
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# now, connect and use paramiko Transport to negotiate SSH2 across the connection
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try:
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t = paramiko.Transport((hostname, port))
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t.connect(username=username, password=password, hostkey=hostkey)
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chan = t.open_session()
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chan.get_pty()
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print '*** Here we go!'
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print
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print '>>> ls'
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chan.exec_command('ps auxww')
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f = chan.makefile('r+')
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for line in f:
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print line.strip('\n')
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chan.close()
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t.close()
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except Exception, e:
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print '*** Caught exception: ' + str(e.__class__) + ': ' + str(e)
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traceback.print_exc()
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try:
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t.close()
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except:
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pass
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sys.exit(1)
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