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'''This handles authentication setup'''
__revision__ = '$Revision$'
from Bcfg2.Server.Generator import Generator, GeneratorInitError, DirectoryBacked
class Account(Generator):
'''This module generates account config files,
based on an internal data repo:
static.(passwd|group|limits.conf) -> static entries
dyn.(passwd|group) -> dynamic entries (usually acquired from yp)
useraccess -> users to be granted login access on some hosts
superusers -> users to be granted root privs on all hosts
rootlike -> users to be granted root privs on some hosts
'''
__name__ = 'Account'
__version__ = '$Id$'
__author__ = 'bcfg-dev@mcs.anl.gov'
def __init__(self, core, datastore):
Generator.__init__(self, core, datastore)
self.__provides__ = {'ConfigFile':{'/etc/passwd':self.from_yp_cb,
'/etc/group':self.from_yp_cb,
'/etc/security/limits.conf':self.gen_limits_cb,
'/root/.ssh/authorized_keys':self.gen_root_keys_cb}}
try:
self.repository = DirectoryBacked(self.data, self.core.fam)
self.ssh = DirectoryBacked("%s/ssh"%(self.data), self.core.fam)
except:
self.LogError("Failed to load repos: %s, %s" % (self.data, "%s/ssh" % (self.data)))
raise GeneratorInitError
def from_yp_cb(self, entry, metadata):
'''Build password file from cached yp data'''
fname = entry.attrib['name'].split('/')[-1]
entry.text = self.repository.entries["static.%s" % (fname)].data
entry.text += self.repository.entries["dyn.%s" % (fname)].data
entry.attrib.update({'owner':'root', 'group':'root', 'perms':'0644'})
def gen_limits_cb(self, entry, metadata):
'''Build limits entries based on current ACLs'''
entry.text = self.repository.entries["static.limits.conf"].data
superusers = self.repository.entries["superusers"].data.split()
useraccess = self.repository.entries["useraccess"].data
users = [user for (user, host) in useraccess if host == metadata.hostname]
entry.attrib.upate({'owner':'root', 'group':'root', 'perms':'0600'})
entry.text += "".join(["%s hard maxlogins 1024\n" % uname for uname in superusers + users])
if "*" not in users:
entry.text += "* hard maxlogins 0\n"
def gen_root_keys_cb(self, entry, metadata):
'''Build root authorized keys file based on current ACLs'''
data = ''
superusers = self.repository.entries['superusers'].data.split()
rootlike = [line.split(':', 1) for line in self.repository.entries['rootlike'].data.split()]
superusers += [user for (user, host) in rootlike if host == metadata.hostname]
data = ''
for user in superusers:
if self.ssh.entries.has_key(user):
data += self.ssh.entries[user].data
entry.attrib.update({'owner':'root', 'group':'root', 'perms':'0600'})
entry.text = data
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