diff options
Diffstat (limited to 'venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/hashes.py')
-rw-r--r-- | venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/hashes.py | 115 |
1 files changed, 0 insertions, 115 deletions
diff --git a/venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/hashes.py b/venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/hashes.py deleted file mode 100644 index c6df7a1..0000000 --- a/venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/hashes.py +++ /dev/null @@ -1,115 +0,0 @@ -from __future__ import absolute_import - -import hashlib - -from pip._vendor.six import iteritems, iterkeys, itervalues - -from pip._internal.exceptions import ( - HashMismatch, HashMissing, InstallationError, -) -from pip._internal.utils.misc import read_chunks -from pip._internal.utils.typing import MYPY_CHECK_RUNNING - -if MYPY_CHECK_RUNNING: - from typing import ( # noqa: F401 - Dict, List, BinaryIO, NoReturn, Iterator - ) - from pip._vendor.six import PY3 - if PY3: - from hashlib import _Hash # noqa: F401 - else: - from hashlib import _hash as _Hash # noqa: F401 - - -# The recommended hash algo of the moment. Change this whenever the state of -# the art changes; it won't hurt backward compatibility. -FAVORITE_HASH = 'sha256' - - -# Names of hashlib algorithms allowed by the --hash option and ``pip hash`` -# Currently, those are the ones at least as collision-resistant as sha256. -STRONG_HASHES = ['sha256', 'sha384', 'sha512'] - - -class Hashes(object): - """A wrapper that builds multiple hashes at once and checks them against - known-good values - - """ - def __init__(self, hashes=None): - # type: (Dict[str, List[str]]) -> None - """ - :param hashes: A dict of algorithm names pointing to lists of allowed - hex digests - """ - self._allowed = {} if hashes is None else hashes - - def check_against_chunks(self, chunks): - # type: (Iterator[bytes]) -> None - """Check good hashes against ones built from iterable of chunks of - data. - - Raise HashMismatch if none match. - - """ - gots = {} - for hash_name in iterkeys(self._allowed): - try: - gots[hash_name] = hashlib.new(hash_name) - except (ValueError, TypeError): - raise InstallationError('Unknown hash name: %s' % hash_name) - - for chunk in chunks: - for hash in itervalues(gots): - hash.update(chunk) - - for hash_name, got in iteritems(gots): - if got.hexdigest() in self._allowed[hash_name]: - return - self._raise(gots) - - def _raise(self, gots): - # type: (Dict[str, _Hash]) -> NoReturn - raise HashMismatch(self._allowed, gots) - - def check_against_file(self, file): - # type: (BinaryIO) -> None - """Check good hashes against a file-like object - - Raise HashMismatch if none match. - - """ - return self.check_against_chunks(read_chunks(file)) - - def check_against_path(self, path): - # type: (str) -> None - with open(path, 'rb') as file: - return self.check_against_file(file) - - def __nonzero__(self): - # type: () -> bool - """Return whether I know any known-good hashes.""" - return bool(self._allowed) - - def __bool__(self): - # type: () -> bool - return self.__nonzero__() - - -class MissingHashes(Hashes): - """A workalike for Hashes used when we're missing a hash for a requirement - - It computes the actual hash of the requirement and raises a HashMissing - exception showing it to the user. - - """ - def __init__(self): - # type: () -> None - """Don't offer the ``hashes`` kwarg.""" - # Pass our favorite hash in to generate a "gotten hash". With the - # empty list, it will never match, so an error will always raise. - super(MissingHashes, self).__init__(hashes={FAVORITE_HASH: []}) - - def _raise(self, gots): - # type: (Dict[str, _Hash]) -> NoReturn - raise HashMissing(gots[FAVORITE_HASH].hexdigest()) |