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import os
import re
import lxml.etree
import Bcfg2.Server.Lint
import Bcfg2.Client.Tools.POSIX
import Bcfg2.Client.Tools.VCS
from Bcfg2.Server.Plugins.Packages import Apt, Yum
from Bcfg2.Server.Plugins.Bundler import have_genshi
if have_genshi:
from Bcfg2.Server.Plugins.SGenshi import SGenshiTemplateFile
# format verifying functions
def is_filename(val):
return val.startswith("/") and len(val) > 1
def is_selinux_type(val):
return re.match(r'^[a-z_]+_t', val)
def is_selinux_user(val):
return re.match(r'^[a-z_]+_u', val)
def is_octal_mode(val):
return re.match(r'[0-7]{3,4}', val)
def is_username(val):
return re.match(r'^([a-z]\w{0,30}|\d+)$', val)
def is_device_mode(val):
try:
# checking upper bound seems like a good way to discover some
# obscure OS with >8-bit device numbers
return int(val) > 0
except:
return False
class RequiredAttrs(Bcfg2.Server.Lint.ServerPlugin):
""" verify attributes for configuration entries (as defined in
doc/server/configurationentries) """
def __init__(self, *args, **kwargs):
Bcfg2.Server.Lint.ServerPlugin.__init__(self, *args, **kwargs)
self.required_attrs = dict(
Path=dict(
device=dict(name=is_filename, owner=is_username,
group=is_username,
dev_type=lambda v: \
v in Bcfg2.Client.Tools.POSIX.device_map),
directory=dict(name=is_filename, owner=is_username,
group=is_username, perms=is_octal_mode),
file=dict(name=is_filename, owner=is_username,
group=is_username, perms=is_octal_mode,
__text__=None),
hardlink=dict(name=is_filename, to=is_filename),
symlink=dict(name=is_filename, to=is_filename),
ignore=dict(name=is_filename),
nonexistent=dict(name=is_filename),
permissions=dict(name=is_filename, owner=is_username,
group=is_username, perms=is_octal_mode),
vcs=dict(vcstype=lambda v: (v != 'Path' and
hasattr(Bcfg2.Client.Tools.VCS,
"Install%s" % v)),
revision=None, sourceurl=None)),
Service={
"chkconfig": dict(name=None),
"deb": dict(name=None),
"rc-update": dict(name=None),
"smf": dict(name=None, FMRI=None),
"upstart": dict(name=None)},
Action={None: dict(name=None,
timing=lambda v: v in ['pre', 'post', 'both'],
when=lambda v: v in ['modified', 'always'],
status=lambda v: v in ['ignore', 'check'],
command=None)},
ACL=dict(
default=dict(scope=lambda v: v in ['user', 'group'],
perms=lambda v: re.match('^([0-7]|[rwx\-]{0,3}',
v)),
access=dict(scope=lambda v: v in ['user', 'group'],
perms=lambda v: re.match('^([0-7]|[rwx\-]{0,3}',
v)),
mask=dict(perms=lambda v: re.match('^([0-7]|[rwx\-]{0,3}', v))),
Package={None: dict(name=None)},
SELinux=dict(
boolean=dict(name=None,
value=lambda v: v in ['on', 'off']),
module=dict(name=None, __text__=None),
port=dict(name=lambda v: re.match(r'^\d+(-\d+)?/(tcp|udp)', v),
selinuxtype=is_selinux_type),
fcontext=dict(name=None, selinuxtype=is_selinux_type),
node=dict(name=lambda v: "/" in v,
selinuxtype=is_selinux_type,
proto=lambda v: v in ['ipv6', 'ipv4']),
login=dict(name=is_username,
selinuxuser=is_selinux_user),
user=dict(name=is_selinux_user,
roles=lambda v: all(is_selinux_user(u)
for u in " ".split(v)),
prefix=None),
interface=dict(name=None, selinuxtype=is_selinux_type),
permissive=dict(name=is_selinux_type))
)
def Run(self):
self.check_packages()
if "Defaults" in self.core.plugins:
self.logger.info("Defaults plugin enabled; skipping required "
"attribute checks")
else:
self.check_rules()
self.check_bundles()
@classmethod
def Errors(cls):
return {"unknown-entry-type":"error",
"unknown-entry-tag":"error",
"required-attrs-missing":"error",
"required-attr-format":"error",
"extra-attrs":"warning"}
def check_packages(self):
""" check package sources for Source entries with missing attrs """
if 'Packages' in self.core.plugins:
for source in self.core.plugins['Packages'].sources:
if isinstance(source, Yum.YumSource):
if (not source.pulp_id and not source.url and
not source.rawurl):
self.LintError("required-attrs-missing",
"A %s source must have either a url, "
"rawurl, or pulp_id attribute: %s" %
(source.ptype,
self.RenderXML(source.xsource)))
elif not source.url and not source.rawurl:
self.LintError("required-attrs-missing",
"A %s source must have either a url or "
"rawurl attribute: %s" %
(source.ptype,
self.RenderXML(source.xsource)))
if (not isinstance(source, Apt.AptSource) and
source.recommended):
self.LintError("extra-attrs",
"The recommended attribute is not "
"supported on %s sources: %s" %
(source.ptype,
self.RenderXML(source.xsource)))
def check_rules(self):
""" check Rules for Path entries with missing attrs """
if 'Rules' in self.core.plugins:
for rules in self.core.plugins['Rules'].entries.values():
xdata = rules.pnode.data
for path in xdata.xpath("//Path"):
self.check_entry(path, os.path.join(self.config['repo'],
rules.name))
def check_bundles(self):
""" check bundles for BoundPath entries with missing attrs """
if 'Bundler' in self.core.plugins:
for bundle in self.core.plugins['Bundler'].entries.values():
if (self.HandlesFile(bundle.name) and
(not have_genshi or
not isinstance(bundle, SGenshiTemplateFile))):
try:
xdata = lxml.etree.XML(bundle.data)
except (lxml.etree.XMLSyntaxError, AttributeError):
xdata = \
lxml.etree.parse(bundle.template.filepath).getroot()
for path in xdata.xpath("//*[substring(name(), 1, 5) = 'Bound']"):
self.check_entry(path, bundle.name)
def check_entry(self, entry, filename):
""" generic entry check """
if self.HandlesFile(filename):
name = entry.get('name')
tag = entry.tag
if tag.startswith("Bound"):
tag = tag[5:]
if tag not in self.required_attrs:
self.LintError("unknown-entry-tag",
"Unknown entry tag '%s': %s" %
(tag, self.RenderXML(entry)))
if isinstance(self.required_attrs[tag], dict):
etype = entry.get('type')
if etype in self.required_attrs[tag]:
required_attrs = self.required_attrs[tag][etype]
else:
self.LintError("unknown-entry-type",
"Unknown %s type %s: %s" %
(tag, etype, self.RenderXML(entry)))
return
else:
required_attrs = self.required_attrs[tag]
attrs = set(entry.attrib.keys())
if 'dev_type' in required_attrs:
dev_type = entry.get('dev_type')
if dev_type in ['block', 'char']:
# check if major/minor are specified
required_attrs['major'] = is_device_mode
required_attrs['minor'] = is_device_mode
if tag == 'ACL' and 'scope' in required_attrs:
required_attrs[entry.get('scope')] = is_username
if '__text__' in required_attrs:
del required_attrs['__text__']
if (not entry.text and
not entry.get('empty', 'false').lower() == 'true'):
self.LintError("required-attrs-missing",
"Text missing for %s %s in %s: %s" %
(tag, name, filename,
self.RenderXML(entry)))
if not attrs.issuperset(required_attrs.keys()):
self.LintError("required-attrs-missing",
"The following required attribute(s) are "
"missing for %s %s in %s: %s\n%s" %
(tag, name, filename,
", ".join([attr
for attr in
set(required_attrs.keys()).difference(attrs)]),
self.RenderXML(entry)))
for attr, fmt in required_attrs.items():
if fmt and attr in attrs and not fmt(entry.attrib[attr]):
self.LintError("required-attr-format",
"The %s attribute of %s %s in %s is "
"malformed\n%s" %
(attr, tag, name, filename,
self.RenderXML(entry)))
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