170 lines
7.1 KiB
Python
170 lines
7.1 KiB
Python
from __future__ import print_function
|
|
|
|
import csv
|
|
import hashlib
|
|
import os.path
|
|
import re
|
|
import stat
|
|
import time
|
|
from collections import OrderedDict
|
|
from distutils import log as logger
|
|
from zipfile import ZIP_DEFLATED, ZipInfo, ZipFile
|
|
|
|
from wheel.cli import WheelError
|
|
from wheel.util import urlsafe_b64decode, as_unicode, native, urlsafe_b64encode, as_bytes, StringIO
|
|
|
|
# Non-greedy matching of an optional build number may be too clever (more
|
|
# invalid wheel filenames will match). Separate regex for .dist-info?
|
|
WHEEL_INFO_RE = re.compile(
|
|
r"""^(?P<namever>(?P<name>.+?)-(?P<ver>.+?))(-(?P<build>\d[^-]*))?
|
|
-(?P<pyver>.+?)-(?P<abi>.+?)-(?P<plat>.+?)\.whl$""",
|
|
re.VERBOSE)
|
|
|
|
|
|
def get_zipinfo_datetime(timestamp=None):
|
|
# Some applications need reproducible .whl files, but they can't do this without forcing
|
|
# the timestamp of the individual ZipInfo objects. See issue #143.
|
|
timestamp = int(os.environ.get('SOURCE_DATE_EPOCH', timestamp or time.time()))
|
|
return time.gmtime(timestamp)[0:6]
|
|
|
|
|
|
class WheelFile(ZipFile):
|
|
"""A ZipFile derivative class that also reads SHA-256 hashes from
|
|
.dist-info/RECORD and checks any read files against those.
|
|
"""
|
|
|
|
_default_algorithm = hashlib.sha256
|
|
|
|
def __init__(self, file, mode='r', compression=ZIP_DEFLATED):
|
|
basename = os.path.basename(file)
|
|
self.parsed_filename = WHEEL_INFO_RE.match(basename)
|
|
if not basename.endswith('.whl') or self.parsed_filename is None:
|
|
raise WheelError("Bad wheel filename {!r}".format(basename))
|
|
|
|
ZipFile.__init__(self, file, mode, compression=compression, allowZip64=True)
|
|
|
|
self.dist_info_path = '{}.dist-info'.format(self.parsed_filename.group('namever'))
|
|
self.record_path = self.dist_info_path + '/RECORD'
|
|
self._file_hashes = OrderedDict()
|
|
self._file_sizes = {}
|
|
if mode == 'r':
|
|
# Ignore RECORD and any embedded wheel signatures
|
|
self._file_hashes[self.record_path] = None, None
|
|
self._file_hashes[self.record_path + '.jws'] = None, None
|
|
self._file_hashes[self.record_path + '.p7s'] = None, None
|
|
|
|
# Fill in the expected hashes by reading them from RECORD
|
|
try:
|
|
record = self.open(self.record_path)
|
|
except KeyError:
|
|
raise WheelError('Missing {} file'.format(self.record_path))
|
|
|
|
with record:
|
|
for line in record:
|
|
line = line.decode('utf-8')
|
|
path, hash_sum, size = line.rsplit(u',', 2)
|
|
if hash_sum:
|
|
algorithm, hash_sum = hash_sum.split(u'=')
|
|
try:
|
|
hashlib.new(algorithm)
|
|
except ValueError:
|
|
raise WheelError('Unsupported hash algorithm: {}'.format(algorithm))
|
|
|
|
if algorithm.lower() in {'md5', 'sha1'}:
|
|
raise WheelError(
|
|
'Weak hash algorithm ({}) is not permitted by PEP 427'
|
|
.format(algorithm))
|
|
|
|
self._file_hashes[path] = (
|
|
algorithm, urlsafe_b64decode(hash_sum.encode('ascii')))
|
|
|
|
def open(self, name_or_info, mode="r", pwd=None):
|
|
def _update_crc(newdata, eof=None):
|
|
if eof is None:
|
|
eof = ef._eof
|
|
update_crc_orig(newdata)
|
|
else: # Python 2
|
|
update_crc_orig(newdata, eof)
|
|
|
|
running_hash.update(newdata)
|
|
if eof and running_hash.digest() != expected_hash:
|
|
raise WheelError("Hash mismatch for file '{}'".format(native(ef_name)))
|
|
|
|
ef = ZipFile.open(self, name_or_info, mode, pwd)
|
|
ef_name = as_unicode(name_or_info.filename if isinstance(name_or_info, ZipInfo)
|
|
else name_or_info)
|
|
if mode == 'r' and not ef_name.endswith('/'):
|
|
if ef_name not in self._file_hashes:
|
|
raise WheelError("No hash found for file '{}'".format(native(ef_name)))
|
|
|
|
algorithm, expected_hash = self._file_hashes[ef_name]
|
|
if expected_hash is not None:
|
|
# Monkey patch the _update_crc method to also check for the hash from RECORD
|
|
running_hash = hashlib.new(algorithm)
|
|
update_crc_orig, ef._update_crc = ef._update_crc, _update_crc
|
|
|
|
return ef
|
|
|
|
def write_files(self, base_dir):
|
|
logger.info("creating '%s' and adding '%s' to it", self.filename, base_dir)
|
|
deferred = []
|
|
for root, dirnames, filenames in os.walk(base_dir):
|
|
# Sort the directory names so that `os.walk` will walk them in a
|
|
# defined order on the next iteration.
|
|
dirnames.sort()
|
|
for name in sorted(filenames):
|
|
path = os.path.normpath(os.path.join(root, name))
|
|
if os.path.isfile(path):
|
|
arcname = os.path.relpath(path, base_dir).replace(os.path.sep, '/')
|
|
if arcname == self.record_path:
|
|
pass
|
|
elif root.endswith('.dist-info'):
|
|
deferred.append((path, arcname))
|
|
else:
|
|
self.write(path, arcname)
|
|
|
|
deferred.sort()
|
|
for path, arcname in deferred:
|
|
self.write(path, arcname)
|
|
|
|
def write(self, filename, arcname=None, compress_type=None):
|
|
with open(filename, 'rb') as f:
|
|
st = os.fstat(f.fileno())
|
|
data = f.read()
|
|
|
|
zinfo = ZipInfo(arcname or filename, date_time=get_zipinfo_datetime(st.st_mtime))
|
|
zinfo.external_attr = (stat.S_IMODE(st.st_mode) | stat.S_IFMT(st.st_mode)) << 16
|
|
zinfo.compress_type = compress_type or self.compression
|
|
self.writestr(zinfo, data, compress_type)
|
|
|
|
def writestr(self, zinfo_or_arcname, bytes, compress_type=None):
|
|
ZipFile.writestr(self, zinfo_or_arcname, bytes, compress_type)
|
|
fname = (zinfo_or_arcname.filename if isinstance(zinfo_or_arcname, ZipInfo)
|
|
else zinfo_or_arcname)
|
|
logger.info("adding '%s'", fname)
|
|
if fname != self.record_path:
|
|
hash_ = self._default_algorithm(bytes)
|
|
self._file_hashes[fname] = hash_.name, native(urlsafe_b64encode(hash_.digest()))
|
|
self._file_sizes[fname] = len(bytes)
|
|
|
|
def close(self):
|
|
# Write RECORD
|
|
if self.fp is not None and self.mode == 'w' and self._file_hashes:
|
|
data = StringIO()
|
|
writer = csv.writer(data, delimiter=',', quotechar='"', lineterminator='\n')
|
|
writer.writerows((
|
|
(
|
|
fname,
|
|
algorithm + "=" + hash_,
|
|
self._file_sizes[fname]
|
|
)
|
|
for fname, (algorithm, hash_) in self._file_hashes.items()
|
|
))
|
|
writer.writerow((format(self.record_path), "", ""))
|
|
zinfo = ZipInfo(native(self.record_path), date_time=get_zipinfo_datetime())
|
|
zinfo.compress_type = self.compression
|
|
zinfo.external_attr = 0o664 << 16
|
|
self.writestr(zinfo, as_bytes(data.getvalue()))
|
|
|
|
ZipFile.close(self)
|