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https://github.com/xcat2/confluent.git
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824253ae8c
This actually uses the previously commited class, with one fix for the structure of the key as passed into the callback.
137 lines
5.0 KiB
Python
137 lines
5.0 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2015 Lenovo
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# This plugin provides an ssh implementation comforming to the 'console'
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# specification. consoleserver or shellserver would be equally likely
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# to use this.
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import confluent.exceptions as cexc
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import confluent.interface.console as conapi
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import confluent.log as log
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import eventlet
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import hashlib
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paramiko = eventlet.import_patched('paramiko')
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class HostKeyHandler(paramiko.client.MissingHostKeyPolicy):
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def __init__(self, configmanager, node):
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self.cfm = configmanager
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self.node = node
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def missing_host_key(self, client, hostname, key):
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fingerprint = 'sha512$' + hashlib.sha512(key.asbytes()).hexdigest()
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cfg = self.cfm.get_node_attributes(
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self.node, ('pubkeys.ssh', 'pubkeys.addpolicy'))
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if 'pubkeys.ssh' not in cfg[self.node]:
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if ('pubkeys.addpolicy' in cfg[self.node] and
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cfg[self.node]['pubkeys.addpolicy'] and
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cfg[self.node]['pubkeys.addpolicy']['value'] == 'manual'):
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raise cexc.PubkeyInvalid('New ssh key detected',
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key, fingerprint, 'pubkeys.ssh')
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auditlog = log.Logger('audit')
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auditlog.log({'node': self.node, 'event': 'sshautoadd',
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'fingerprint': fingerprint})
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self.cfm.set_node_attributes(
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{self.node: {'pubkeys.ssh': fingerprint}})
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return True
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elif cfg[self.node]['pubkeys.ssh']['value'] == fingerprint:
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return True
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raise cexc.PubKeyInvalid(
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'Mismatched SSH host key detected', key, fingerprint, 'pubkeys.ssh'
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)
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class SshShell(conapi.Console):
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def __init__(self, node, config, username='', password=''):
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self.node = node
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self.ssh = None
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self.nodeconfig = config
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self.username = username
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self.password = password
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self.inputmode = 0 # 0 = username, 1 = password...
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def recvdata(self):
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while self.connected:
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pendingdata = self.shell.recv(8192)
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if pendingdata == '':
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self.datacallback(conapi.ConsoleEvent.Disconnect)
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return
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self.datacallback(pendingdata)
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def connect(self, callback):
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# for now, we just use the nodename as the presumptive ssh destination
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# TODO(jjohnson2): use a 'nodeipget' utility function for architectures
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# that would rather not use the nodename as anything but an opaque
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# identifier
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self.datacallback = callback
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if self.username is not '':
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self.logon()
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else:
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self.inputmode = 0
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callback('\r\nlogin as: ')
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return
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def logon(self):
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self.ssh = paramiko.SSHClient()
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self.ssh.set_missing_host_key_policy(
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HostKeyHandler(self.nodeconfig, self.node))
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try:
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self.ssh.connect(self.node, username=self.username,
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password=self.password, allow_agent=False,
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look_for_keys=False)
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except paramiko.AuthenticationException:
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self.inputmode = 0
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self.username = ''
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self.password = ''
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self.datacallback('\r\nlogin as: ')
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return
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self.inputmode = 2
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self.connected = True
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self.shell = self.ssh.invoke_shell()
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self.rxthread = eventlet.spawn(self.recvdata)
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def write(self, data):
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if self.inputmode == 0:
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self.username += data
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if '\r' in self.username:
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self.username, self.password = self.username.split('\r')
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lastdata = data.split('\r')[0]
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if lastdata != '':
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self.datacallback(lastdata)
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self.datacallback('\r\nEnter password: ')
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self.inputmode = 1
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else:
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# echo back typed data
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self.datacallback(data)
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elif self.inputmode == 1:
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self.password += data
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if '\r' in self.password:
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self.password = self.password.split('\r')[0]
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self.datacallback('\r\n')
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self.logon()
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else:
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self.shell.sendall(data)
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def close(self):
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if self.ssh is not None:
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self.ssh.close()
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def create(nodes, element, configmanager, inputdata):
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if len(nodes) == 1:
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return SshShell(nodes[0], configmanager) |