-#!/usr/bin/env python
+# Copyright 2012 GRNET S.A. All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or
+# without modification, are permitted provided that the following
+# conditions are met:
+#
+# 1. Redistributions of source code must retain the above
+# copyright notice, this list of conditions and the following
+# disclaimer.
+#
+# 2. Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following
+# disclaimer in the documentation and/or other materials
+# provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
+# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+# The views and conclusions contained in the software and
+# documentation are those of the authors and should not be
+# interpreted as representing official policies, either expressed
+# or implied, of GRNET S.A.
import re
+import sys
+
+from image_creator.os_type import OSBase, sysprep
-from image_creator.os_type import OSBase
class Unix(OSBase):
- def get_metadata(self):
- meta = super(Unix, self).get_metadata()
- meta["USERS"] = " ".join(self.get_passworded_users())
- return meta
- def get_passworded_users(self):
-
- users = []
+ sensitive_userdata = [
+ '.bash_history',
+ '.gnupg',
+ '.ssh'
+ ]
+
+ def __init__(self, rootdev, ghandler, output):
+ super(Unix, self).__init__(rootdev, ghandler, output)
+ self.meta["USERS"] = " ".join(self._get_passworded_users())
+ # Delete the USERS metadata if empty
+ if not len(self.meta['USERS']):
+ self.out.warn("No passworded users found!")
+ del self.meta['USERS']
+
+ def _get_passworded_users(self):
+ users = []
regexp = re.compile('(\S+):((?:!\S+)|(?:[^!*]\S+)|):(?:\S*:){6}')
- for line in open('/etc/shadow', 'r').readlines():
+ for line in self.g.cat('/etc/shadow').splitlines():
match = regexp.match(line)
if not match:
continue
user, passwd = match.groups()
if len(passwd) > 0 and passwd[0] == '!':
- print "Warning: %s is locked" % user
+ self.out.warn("Ignoring locked %s account." % user)
else:
users.append(user)
return users
- def cleanup_sensitive_data(self):
- cleanup_userdata()
- cleanup_tmp()
- cleanup_log()
+ @sysprep(enabled=False)
+ def remove_user_accounts(self, print_header=True):
+ """Remove all user accounts with id greater than 1000"""
+
+ if print_header:
+ self.out.output("Removing all user accounts with id greater than "
+ "1000")
+
+ if 'USERS' not in self.meta:
+ return
+
+ # Remove users from /etc/passwd
+ passwd = []
+ removed_users = {}
+ metadata_users = self.meta['USERS'].split()
+ for line in self.g.cat('/etc/passwd').splitlines():
+ fields = line.split(':')
+ if int(fields[2]) > 1000:
+ removed_users[fields[0]] = fields
+ # remove it from the USERS metadata too
+ if fields[0] in metadata_users:
+ metadata_users.remove(fields[0])
+ else:
+ passwd.append(':'.join(fields))
+
+ self.meta['USERS'] = " ".join(metadata_users)
+
+ # Delete the USERS metadata if empty
+ if not len(self.meta['USERS']):
+ del self.meta['USERS']
+
+ self.g.write('/etc/passwd', '\n'.join(passwd) + '\n')
+
+ # Remove the corresponding /etc/shadow entries
+ shadow = []
+ for line in self.g.cat('/etc/shadow').splitlines():
+ fields = line.split(':')
+ if fields[0] not in removed_users:
+ shadow.append(':'.join(fields))
+
+ self.g.write('/etc/shadow', "\n".join(shadow) + '\n')
+
+ # Remove the corresponding /etc/group entries
+ group = []
+ for line in self.g.cat('/etc/group').splitlines():
+ fields = line.split(':')
+ # Remove groups tha have the same name as the removed users
+ if fields[0] not in removed_users:
+ group.append(':'.join(fields))
+
+ self.g.write('/etc/group', '\n'.join(group) + '\n')
+
+ # Remove home directories
+ for home in [field[5] for field in removed_users.values()]:
+ if self.g.is_dir(home) and home.startswith('/home/'):
+ self.g.rm_rf(home)
+
+ @sysprep()
+ def cleanup_passwords(self, print_header=True):
+ """Remove all passwords and lock all user accounts"""
+
+ if print_header:
+ self.out.output("Cleaning up passwords & locking all user "
+ "accounts")
+
+ shadow = []
+
+ for line in self.g.cat('/etc/shadow').splitlines():
+ fields = line.split(':')
+ if fields[1] not in ('*', '!'):
+ fields[1] = '!'
+
+ shadow.append(":".join(fields))
+
+ self.g.write('/etc/shadow', "\n".join(shadow) + '\n')
+
+ @sysprep()
+ def cleanup_cache(self, print_header=True):
+ """Remove all regular files under /var/cache"""
+
+ if print_header:
+ self.out.output('Removing files under /var/cache')
+
+ self.foreach_file('/var/cache', self.g.rm, ftype='r')
+
+ @sysprep()
+ def cleanup_tmp(self, print_header=True):
+ """Remove all files under /tmp and /var/tmp"""
+
+ if print_header:
+ self.out.output('Removing files under /tmp and /var/tmp')
+
+ self.foreach_file('/tmp', self.g.rm_rf, maxdepth=1)
+ self.foreach_file('/var/tmp', self.g.rm_rf, maxdepth=1)
+
+ @sysprep()
+ def cleanup_log(self, print_header=True):
+ """Empty all files under /var/log"""
+
+ if print_header:
+ self.out.output('Emptying all files under /var/log')
+
+ self.foreach_file('/var/log', self.g.truncate, ftype='r')
+
+ @sysprep(enabled=False)
+ def cleanup_mail(self, print_header=True):
+ """Remove all files under /var/mail and /var/spool/mail"""
+
+ if print_header:
+ self.out.output('Removing files under /var/mail & /var/spool/mail')
+
+ self.foreach_file('/var/spool/mail', self.g.rm_rf, maxdepth=1)
+ self.foreach_file('/var/mail', self.g.rm_rf, maxdepth=1)
+
+ @sysprep()
+ def cleanup_userdata(self, print_header=True):
+ """Delete sensitive userdata"""
+
+ homedirs = ['/root'] + self.ls('/home/')
+
+ if print_header:
+ self.out.output("Removing sensitive user data under %s" %
+ " ".join(homedirs))
+
+ for homedir in homedirs:
+ for data in self.sensitive_userdata:
+ fname = "%s/%s" % (homedir, data)
+ if self.g.is_file(fname):
+ self.g.scrub_file(fname)
+ elif self.g.is_dir(fname):
+ self.foreach_file(fname, self.g.scrub_file, ftype='r')
# vim: set sta sts=4 shiftwidth=4 sw=4 et ai :
projects / snf-image-creator / blobdiff