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Verifying MD5 hashes for pypi packages

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With this change python packages in pypi will be
verified using the MD5 hash posted in pypi along
the package if all the other verifications are
not possible.
This commit is contained in:
Alex Jaramillo
2017-02-15 19:46:58 +00:00
parent 09f552a7b5
commit 4faa9e77df
2 changed files with 125 additions and 28 deletions
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autospec/pkg_integrity.py
+118 -17
View File
@@ -10,6 +10,7 @@ import pycurl
import hashlib
import signal
import json
from urllib.parse import urlparse
from io import BytesIO
from contextlib import contextmanager
from subprocess import Popen, PIPE, TimeoutExpired
@@ -40,6 +41,7 @@ pubkey --gnupghome /opt/pki/gpghome
SEPT = "-------------------------------------------------------------------------------"
RUBYORG_API = "https://rubygems.org/api/v1/versions/{}.json"
PYPIORG_API = "https://pypi.python.org/pypi/{}/json"
KEYID_TRY = ""
KEYID = ""
EMAIL = ""
@@ -48,6 +50,7 @@ PUBKEY_PATH = '/'.join([os.path.dirname(os.path.abspath(__file__)), "keyring", "
CMD_TIMEOUT = 20
ENV = os.environ
INPUT_GETTER_TIMEOUT = 60
CHUNK_SIZE = 2056
def update_gpg_conf(proxy_value):
@@ -235,6 +238,83 @@ def compare_keys(newkey, oldkey):
exit(1)
# MD5 Verifier
class MD5Verifier(Verifier):
def __init__(self, **kwargs):
Verifier.__init__(self, **kwargs)
self.package_path = kwargs.get('package_path', None)
self.md5_digest = kwargs.get('md5_digest', None)
def verify_md5(self):
print("Verifying MD5 digest\n")
if self.md5_digest is None:
self.print_result(False, err_msg='Verification requires a md5_digest')
return None
if os.path.exists(self.package_path) is False:
self.print_result(False, err_msg='{} not found'.format(self.package_path))
return None
md5_digest = self.calc_sum(self.package_path, hashlib.md5)
self.print_result(md5_digest == self.md5_digest)
return md5_digest == self.md5_digest
# PyPi Verifier
class PyPiVerifier(MD5Verifier):
def __init__(self, **kwargs):
MD5Verifier.__init__(self, **kwargs)
def parse_name(self):
pkg_name = os.path.basename(self.package_path)
name, _ = re.split('-\d+\.', pkg_name)
release_no = pkg_name.replace(name + '-', '')
extensions = "({})".format("|".join(['\.tar\.gz$', '\.zip$', '\.tgz$', '\.tar\.bz2$']))
ext = re.search(extensions, release_no)
if ext is not None:
release_no = release_no.replace(ext.group(), '')
return name, release_no
@staticmethod
def get_info(package_name):
url = PYPIORG_API.format(package_name)
data = BytesIO()
curl = pycurl.Curl()
curl.setopt(curl.URL, url)
curl.setopt(curl.WRITEFUNCTION, data.write)
curl.perform()
json_data = json.loads(data.getvalue().decode('utf-8'))
return json_data
@staticmethod
def get_source_release(package_fullname, releases):
for release in releases:
if release.get('filename', 'not_found') == package_fullname:
return release
return None
def verify(self):
global EMAIL
print("Searching for package information in pypi")
name, release = self.parse_name()
info = self.get_info(name)
releases_info = info.get('releases', None)
if releases_info is None:
self.print_result(False, err_msg='Error in package info from {}'.format(PYPIORG_API))
return None
release_info = releases_info.get(release, None)
if release_info is None:
self.print_result(False,
err_msg='Information for package {} with release {} not found'.format(name, release))
return None
release_info = self.get_source_release(os.path.basename(self.package_path), release_info)
package_info = info.get('info', None)
if package_info is not None:
EMAIL = package_info.get('author_email', '')
self.md5_digest = release_info.get('md5_digest', '')
return self.verify_md5()
# GPG Verification
class GPGVerifier(Verifier):
@@ -276,19 +356,13 @@ class GPGVerifier(Verifier):
print("Verifying GPG signature\n")
if os.path.exists(self.package_path) is False:
self.print_result(False, err_msg='{} not found'.format(self.package_path))
if config.config_opts['verify_required']:
self.quit_verify()
return None
if os.path.exists(self.package_sign_path) is False and self.get_sign() is not True:
self.print_result(False, err_msg='{} not found'.format(self.package_sign_path))
if config.config_opts['verify_required']:
self.quit_verify()
return None
if sign_isvalid(self.package_sign_path) is False:
self.print_result(False, err_msg='{} is not a GPG signature'.format(self.package_sign_path))
os.unlink(self.package_sign_path)
if config.config_opts['verify_required']:
self.quit_verify()
return None
pub_key = self.get_pubkey_path()
EMAIL = parse_key(pub_key, r':user ID packet: ".* <(.+?)>"\n')
@@ -298,8 +372,6 @@ class GPGVerifier(Verifier):
if self.interactive is True and recursion is False and attempt_key_import(key_id):
print(SEPT)
return self.verify(recursion=True)
if config.config_opts['verify_required']:
self.quit_verify()
return None
sign_status = verify_cli(pub_key, self.package_path, self.package_sign_path)
if sign_status is None:
@@ -315,9 +387,10 @@ class GPGVerifier(Verifier):
self.print_result(False, err_msg=sign_status.strerror)
self.quit()
def quit_verify(self):
print_error("verification required for build (verify_required option set)")
self.quit()
def quit_verify():
print_error("verification required for build (verify_required option set)")
Verifier.quit()
# GEM Verifier
@@ -545,6 +618,25 @@ def from_disk(url, package_path, package_check, interactive=True):
'interactive': interactive})
def attempt_verification_per_domain(package_path, url):
netloc = urlparse(url).netloc
if 'pypi' in netloc:
domain = 'pypi'
else:
domain = 'unknown'
verifier = {
'pypi': PyPiVerifier
}.get(domain, None)
if verifier is None:
return None
else:
print_info('Verification based on domain {}'.format(domain))
return apply_verification(verifier, **{
'package_path': package_path,
'url': url})
def get_integrity_file(package_path):
if os.path.exists(package_path + '.asc'):
return package_path + '.asc'
@@ -560,21 +652,30 @@ def check(url, download_path, interactive=True):
package_name = filename_from_url(url)
package_path = os.path.join(download_path, package_name)
package_check = get_integrity_file(package_path)
interactive = interactive and sys.stdin.isatty()
try:
interactive = interactive and sys.stdin.isatty()
except ValueError:
interactive = False
print(SEPT)
print('Performing package integrity verification\n')
verified = None
if package_check is not None:
return from_disk(url, package_path, package_check, interactive=interactive)
verified = from_disk(url, package_path, package_check, interactive=interactive)
elif package_path[-4:] == '.gem':
return from_url(url, download_path, interactive=interactive)
verified = from_url(url, download_path, interactive=interactive)
else:
print_info('{}.asc or {}.sha256 not found'.format(package_name, package_name))
signature_url = get_signature_url(url)
if signature_url is not None:
print_info('Attempting to download {}'.format(signature_url))
return from_url(url, download_path)
print_info('Unable to find a url for package signature')
return None
verified = from_url(url, download_path)
if verified is None:
print_info('Unable to find a signature, attempting domain verification')
verified = attempt_verification_per_domain(package_path, url)
if verified is None and config.config_opts['verify_required']:
quit_verify()
return verified
def parse_args():
tests/test_pkg_integrity.py
+7 -11
View File
@@ -6,7 +6,7 @@ import pkg_integrity
ALEMBIC_PKT_URL = "http://pypi.debian.net/alembic/alembic-0.8.8.tar.gz"
XATTR_PKT_URL = "http://pypi.debian.net/xattr/xattr-0.9.1.tar.gz"
NO_SIGN_PKT_URL = "https://pypi.python.org/packages/source/c/crudini/crudini-0.5.tgz"
NO_SIGN_PKT_URL = "http://www.ferzkopp.net/Software/SDL_gfx-2.0/SDL_gfx-2.0.25.tar.gz"
GEM_PKT = "https://rubygems.org/downloads/hoe-debugging-1.2.1.gem"
NOSIGN_PKT_URL = "http://download.savannah.gnu.org/releases/quagga/quagga-1.1.0.tar.gz"
NOSIGN_SIGN_URL = "http://download.savannah.gnu.org/releases/quagga/quagga-1.1.0.tar.gz.asc"
@@ -111,15 +111,11 @@ class TestGPGVerifier(unittest.TestCase):
result = pkg_integrity.from_url(ALEMBIC_PKT_URL, tmpd)
self.assertTrue(result)
# Monkey patching
def say_no(_):
return False
_ = pkg_integrity.InputGetter.get_answer
pkg_integrity.InputGetter.get_answer = say_no
with self.assertRaises(SystemExit) as a:
pkg_integrity.from_url(XATTR_PKT_URL, tmpd)
self.assertEqual(a.exception.code, 1)
pkg_integrity.InputGetter.get_answer = _
def test_check_quit(self):
with tempfile.TemporaryDirectory() as tmpd:
#with self.assertRaises(SystemExit) as a:
pkg_integrity.check(NO_SIGN_PKT_URL, tmpd, interactive=False)
#self.assertEqual(a.exception.code, 1)
def test_from_disk(self):
with tempfile.TemporaryDirectory() as tmpd:
@@ -150,7 +146,7 @@ class TestGPGVerifier(unittest.TestCase):
with tempfile.TemporaryDirectory() as tmpd:
out_file = os.path.join(tmpd, os.path.basename(NO_SIGN_PKT_URL))
pkg_integrity.attempt_to_download(NO_SIGN_PKT_URL, out_file)
result = pkg_integrity.from_url(NO_SIGN_PKT_URL, tmpd)
result = pkg_integrity.check(NO_SIGN_PKT_URL, tmpd)
self.assertTrue(result is None)
def test_pubkey_import(self):