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# Copyright (C) 2014-2015 Codethink Limited
#
# 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; version 2 of the License.
#
# 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
# This plugin is used as part of the Baserock automated release process.
#
# See: <http://wiki.baserock.org/guides/release-process> for more information.
import warnings
import re
import cliapp
import morphlib
class CVECheckPlugin(cliapp.Plugin):
def enable(self):
self.app.add_subcommand(
'cve-check', self.cve_check,
arg_synopsis='REPO REF MORPH [MORPH]...')
def disable(self):
pass
def cve_check(self, args):
'''Certify that any given system definition is reproducable.
Command line arguments:
* `REPO` is a git repository URL.
* `REF` is a branch or other commit reference in that repository.
* `MORPH` is a system morphology name at that ref.
'''
if len(args) < 3:
raise cliapp.AppException(
'Wrong number of arguments to certify command '
'(see help)')
repo, ref = args[0], args[1]
system_filenames = map(morphlib.util.sanitise_morphology_path,
args[2:])
self.lrc, self.rrc = morphlib.util.new_repo_caches(self.app)
self.resolver = morphlib.artifactresolver.ArtifactResolver()
self.cve_db = CVEDataBase()
self.version_guesser = VersionGuesser()
for system_filename in system_filenames:
self.certify_system(repo, ref, system_filename)
def certify_system(self, repo, ref, system_filename):
'''Certify reproducibility of system.'''
self.app.status(
msg='Creating source pool for %s' % system_filename, chatty=True)
source_pool = morphlib.sourceresolver.create_source_pool(
self.lrc, self.rrc, repo, ref, system_filename,
cachedir=self.app.settings['cachedir'],
update_repos = not self.app.settings['no-git-update'],
status_cb=self.app.status)
self.app.status(
msg='Resolving artifacts for %s' % system_filename, chatty=True)
root_artifacts = self.resolver.resolve_root_artifacts(source_pool)
def find_artifact_by_name(artifacts_list, filename):
for a in artifacts_list:
if a.source.filename == filename:
return a
raise ValueError
system_artifact = find_artifact_by_name(root_artifacts,
system_filename)
aliases = self.app.settings['repo-alias']
resolver = morphlib.repoaliasresolver.RepoAliasResolver(aliases)
for source in set(a.source for a in system_artifact.walk()):
if source.morphology['kind'] != 'chunk':
continue
name = source.morphology['name']
ref = source.original_ref
print(' Checking chunk: {}'.format(name))
# Ensure we have a cache of the repo
if not self.lrc.has_repo(source.repo_name):
self.lrc.cache_repo(source.repo_name)
cached = self.lrc.get_repo(source.repo_name)
version = self.version_guesser.guess_version(cached, ref)
self.cve_db.check_vulnerability(name, version)
class CVEDetail:
"""
A single CVE
"""
def __init__(self, id, ranges):
self.id = id
self.ranges = ranges
def check_vulnerability(self, version):
print(' {}:'.format(self.id))
for r in self.ranges:
print(' version is {}; vulnerable range is: {} to {}'.
format(version, r[0], r[1]))
class CVESoftware:
"""
A piece of software we track CVEs for
"""
def __init__(self, name):
self.name = name
self.cves = []
def add_cve(self, id, ranges):
cve = CVEDetail(id, ranges)
self.cves.append(cve)
def check_vulnerability(self, version):
for v in self.cves:
v.check_vulnerability(version)
class CVEDataBase:
"""
Provides CVE checking functionality
"""
def __init__(self):
# TODO: In the future this could connect to a DB or load YAML data
# For now it just creates a hardcoded DB
self.db = []
self._add_software('libpng',
[['CVE-2014-9495', [['0', '1.5.20'],
['1.6.9', '1.6.15']]],
['CVE-2014-0333', [['1.6.0', '1.6.9' ]]]
])
self._add_software('openssl-new',
[['CVE-2014-3567', [['1.0.1', '1.0.1i' ],
['1.0.0', '1.0.0n' ],
['0.9.8', '0.9.8zc']]],
['CVE-2014-3568', [['1.0.1', '1.0.1i' ],
['1.0.0', '1.0.0n' ],
['0.9.8', '0.9.8zc']]],
['CVE-2014-3513', [['1.0.1', '1.0.1i' ]]],
['CVE-2015-0289', [['1.0.2', '1.0.2' ],
['1.0.1', '1.0.1l' ],
['1.0.0', '1.0.0q' ],
['0.9.8', '0.9.8ze']]]
])
def _add_software(self, name, cves):
sw = CVESoftware(name)
for v in cves:
sw.add_cve(v[0], v[1])
self.db.append(sw)
def check_vulnerability(self, name, version):
for s in self.db:
if s.name != name:
continue
s.check_vulnerability(version)
break
class ProjectVersionGuesser(object):
def __init__(self, interesting_files):
self.interesting_files = interesting_files
def file_contents(self, cached, ref, tree):
filenames = [x for x in self.interesting_files if x in tree]
if filenames:
for filename in filenames:
yield filename, cached.read_file(filename, ref)
class AutotoolsVersionGuesser(ProjectVersionGuesser):
def __init__(self):
ProjectVersionGuesser.__init__(self, [
'configure.ac',
'configure.in',
'configure.ac.in',
'configure.in.in',
])
def guess_version(self, cached, ref, tree):
version = None
for filename, data in self.file_contents(cached, ref, tree):
# First, try to grep for AC_INIT()
version = self._check_ac_init(data)
if version:
break
return version
def _check_ac_init(self, data):
data = data.replace('\n', ' ')
for macro in ['AC_INIT', 'AM_INIT_AUTOMAKE']:
pattern = r'.*%s\((.*?)\).*' % macro
if not re.match(pattern, data):
continue
acinit = re.sub(pattern, r'\1', data)
if acinit:
version = acinit.split(',')
if macro == 'AM_INIT_AUTOMAKE' and len(version) == 1:
continue
version = version[0] if len(version) == 1 else version[1]
version = re.sub('[\[\]]', '', version).strip()
version = version.split()[0]
if version:
if version and version[0].isdigit():
return version
return None
class VersionGuesser(object):
def __init__(self):
self.guessers = [
AutotoolsVersionGuesser()
]
def guess_version(self, cached, ref):
version = None
tree = cached.list_files(ref, recurse=False)
for guesser in self.guessers:
version = guesser.guess_version(cached, ref, tree)
if version:
return version
# Fall back to `git describe` which always gives something
return cached.version_guess(ref)
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