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#!/usr/bin/python
#
# Fetch login credentials for EC2
# Copyright 2008 Canonical Ltd.
#
# Author: Soren Hansen <soren@canonical.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
import urllib
import os
from configobj import ConfigObj
api_ver = '2008-02-01'
metadata = None
filename='/etc/ec2-init/ec2-config.cfg'
config = ConfigObj(filename)
user = config['user']
config_root = config['DISABLE_ROOT']
def get_ssh_keys():
base_url = 'http://169.254.169.254/%s/meta-data' % api_ver
data = urllib.urlopen('%s/public-keys/' % base_url).read()
keyids = [line.split('=')[0] for line in data.split('\n')]
return [urllib.urlopen('%s/public-keys/%d/openssh-key' % (base_url, int(keyid))).read().rstrip() for keyid in keyids]
def setup_user_keys(k,user):
if not os.path.exists('/home/%s/.ssh' %(user)):
os.mkdir('/home/%s/.ssh' %(user))
authorized_keys = '/home/%s/.ssh/authorized_keys' % user
fp = open(authorized_keys, 'a')
fp.write(''.join(['%s\n' % key for key in keys]))
fp.close()
os.system('chown -R %s:%s /home/%s/.ssh' %(user,user,user))
def setup_root_user(k,root_config):
if root_config == "1":
fp = open('/root/.ssh/authorized_keys', 'a')
fp.write("command=\"echo \'Please ssh to the ubuntu user on this host instead of root\';echo;sleep 10\" ")
fp.write(''.join(['%s\n' % key for key in keys]))
fp.close()
elif root_config == "0":
print "You choose to disable the root user, god help you."
else:
print "%s - I dont understand that opion."
os.umask(077)
if user == "":
print "User must exist in %s" %(filename)
sys.exit(0)
keys = get_ssh_keys()
setup_user_keys(keys,user)
setup_root_user(keys,config_root)
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