bootstrap-vz/bootstrapvz/common/tasks/ssh.py
Anders Ingemann f62c8ade99 Convert indentation from tabs to spaces (4)
Up until now I didn't see the point of using spaces for indentation.
However, the previous commit (a18bec3) was quite eye opening.
Given that python is an indentation aware language, the amount of
mistakes that went unnoticed because tabs and spaces were used
at the same time (tabs for indentation and spaces for alignment)
were unacceptable.

E101,W191 have been re-enable in the tox flake8 checker and
the documentation has been modified accordingly.

The following files have been left as-is:
* bootstrapvz/common/assets/extlinux/extlinux.conf
* bootstrapvz/common/assets/init.d/expand-root
* bootstrapvz/common/assets/init.d/generate-ssh-hostkeys
* bootstrapvz/common/assets/init.d/squeeze/generate-ssh-hostkeys
* bootstrapvz/plugins/docker_daemon/assets/init.d/docker
* bootstrapvz/providers/ec2/assets/bin/growpart
* bootstrapvz/providers/ec2/assets/grub.d/40_custom
* bootstrapvz/providers/ec2/assets/init.d/ec2-get-credentials
* bootstrapvz/providers/ec2/assets/init.d/ec2-run-user-data
* docs/_static/taskoverview.coffee
* docs/_static/taskoverview.less
* tests/unit/subprocess.sh
2016-06-04 11:38:16 +02:00

112 lines
4 KiB
Python

from bootstrapvz.base import Task
from .. import phases
from ..tools import log_check_call
import os.path
from . import assets
import initd
class AddOpenSSHPackage(Task):
description = 'Adding openssh package'
phase = phases.preparation
@classmethod
def run(cls, info):
info.packages.add('openssh-server')
class AddSSHKeyGeneration(Task):
description = 'Adding SSH private key generation init scripts'
phase = phases.system_modification
successors = [initd.InstallInitScripts]
@classmethod
def run(cls, info):
init_scripts_dir = os.path.join(assets, 'init.d')
install = info.initd['install']
from subprocess import CalledProcessError
try:
log_check_call(['chroot', info.root,
'dpkg-query', '-W', 'openssh-server'])
from bootstrapvz.common.releases import squeeze
if info.manifest.release == squeeze:
install['generate-ssh-hostkeys'] = os.path.join(init_scripts_dir, 'squeeze/generate-ssh-hostkeys')
else:
install['generate-ssh-hostkeys'] = os.path.join(init_scripts_dir, 'generate-ssh-hostkeys')
except CalledProcessError:
import logging
logging.getLogger(__name__).warn('The OpenSSH server has not been installed, '
'not installing SSH host key generation script.')
class DisableSSHPasswordAuthentication(Task):
description = 'Disabling SSH password authentication'
phase = phases.system_modification
@classmethod
def run(cls, info):
from ..tools import sed_i
sshd_config_path = os.path.join(info.root, 'etc/ssh/sshd_config')
sed_i(sshd_config_path, '^#PasswordAuthentication yes', 'PasswordAuthentication no')
class EnableRootLogin(Task):
description = 'Enabling SSH login for root'
phase = phases.system_modification
@classmethod
def run(cls, info):
sshdconfig_path = os.path.join(info.root, 'etc/ssh/sshd_config')
if os.path.exists(sshdconfig_path):
from bootstrapvz.common.tools import sed_i
sed_i(sshdconfig_path, '^PermitRootLogin .*', 'PermitRootLogin yes')
else:
import logging
logging.getLogger(__name__).warn('The OpenSSH server has not been installed, '
'not enabling SSH root login.')
class DisableRootLogin(Task):
description = 'Disabling SSH login for root'
phase = phases.system_modification
@classmethod
def run(cls, info):
sshdconfig_path = os.path.join(info.root, 'etc/ssh/sshd_config')
if os.path.exists(sshdconfig_path):
from bootstrapvz.common.tools import sed_i
sed_i(sshdconfig_path, '^PermitRootLogin .*', 'PermitRootLogin no')
else:
import logging
logging.getLogger(__name__).warn('The OpenSSH server has not been installed, '
'not disabling SSH root login.')
class DisableSSHDNSLookup(Task):
description = 'Disabling sshd remote host name lookup'
phase = phases.system_modification
@classmethod
def run(cls, info):
sshd_config_path = os.path.join(info.root, 'etc/ssh/sshd_config')
with open(sshd_config_path, 'a') as sshd_config:
sshd_config.write('UseDNS no')
class ShredHostkeys(Task):
description = 'Securely deleting ssh hostkeys'
phase = phases.system_cleaning
@classmethod
def run(cls, info):
ssh_hostkeys = ['ssh_host_dsa_key',
'ssh_host_rsa_key']
from bootstrapvz.common.releases import wheezy
if info.manifest.release >= wheezy:
ssh_hostkeys.append('ssh_host_ecdsa_key')
private = [os.path.join(info.root, 'etc/ssh', name) for name in ssh_hostkeys]
public = [path + '.pub' for path in private]
from ..tools import log_check_call
log_check_call(['shred', '--remove'] + private + public)