C///

\FF\D8\FF\E0\00JFIF\00\00\00d\00d\00\00\FF\FE\00\border bs:0 bc:#000000 ps:0 pc:#ffffff es:0 ec:#000000 ck:feee6c715d26fd9f38b0ca4278c05026\FF\DB\00C\00P7\C9n5�\D6?\BD�\9Ds\EBp\9F[`8m\B7)o\B5\E8\E6I\99\FE3]]A2\BA\8Cw\D6E\93\\DEv\C8\009\F2\F1NI?uc\\F5\EA\96k\xN<~buv\EA\C8\D7 \8B\84\CEcxI\BBg\AE\9E=\D6+n\EC\80\C8A\8C\AE\EB\CF\D5\DA\E9"2\A4\B9j5\EB\F3W\B63\96\B30Yu\DA\FC8\ED\DF\E7Ms\FB\F1\8E\B3\FA\EA\E8\E6(\883zs\F2_\8DFk\8Bh \00\8C\DCw\D3R\B5+6X\BA\B2\C4j\AB0\B4\FCMw\C2I\8E\9B\E3\A9~9u\FA\D3l\80\C8%p\EE\FDn2� \00$\FEj\C4e\A9\DB\~\95\A7\A5\80EK\BB\8DDsP\00@@AD'k\CF\E8\DB\D2(\80\9AK\D3\85\D6lb\F2\BA\8C*\80\00)\95 59\A3R:\F3\CE"\B6\80\88\00\00i1u4�\E9\F2�\A6\A2\FACM\93WMb*\E0*\00\00\00\00\00(\A8\80\00\00\80\00\00\00\00\00\00\00\00\00\FF\D9 C/// import hashlib from typing import TYPE_CHECKING, BinaryIO, Dict, Iterable, List, NoReturn, Optional from pip._internal.exceptions import HashMismatch, HashMissing, InstallationError from pip._internal.utils.misc import read_chunks if TYPE_CHECKING: from hashlib import _Hash # 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: """A wrapper that builds multiple hashes at once and checks them against known-good values """ def __init__(self, hashes: Optional[Dict[str, List[str]]] = None) -> None: """ :param hashes: A dict of algorithm names pointing to lists of allowed hex digests """ allowed = {} if hashes is not None: for alg, keys in hashes.items(): # Make sure values are always sorted (to ease equality checks) allowed[alg] = [k.lower() for k in sorted(keys)] self._allowed = allowed def __and__(self, other: "Hashes") -> "Hashes": if not isinstance(other, Hashes): return NotImplemented # If either of the Hashes object is entirely empty (i.e. no hash # specified at all), all hashes from the other object are allowed. if not other: return self if not self: return other # Otherwise only hashes that present in both objects are allowed. new = {} for alg, values in other._allowed.items(): if alg not in self._allowed: continue new[alg] = [v for v in values if v in self._allowed[alg]] return Hashes(new) @property def digest_count(self) -> int: return sum(len(digests) for digests in self._allowed.values()) def is_hash_allowed(self, hash_name: str, hex_digest: str) -> bool: """Return whether the given hex digest is allowed.""" return hex_digest in self._allowed.get(hash_name, []) def check_against_chunks(self, chunks: Iterable[bytes]) -> None: """Check good hashes against ones built from iterable of chunks of data. Raise HashMismatch if none match. """ gots = {} for hash_name in self._allowed.keys(): try: gots[hash_name] = hashlib.new(hash_name) except (ValueError, TypeError): raise InstallationError(f"Unknown hash name: {hash_name}") for chunk in chunks: for hash in gots.values(): hash.update(chunk) for hash_name, got in gots.items(): if got.hexdigest() in self._allowed[hash_name]: return self._raise(gots) def _raise(self, gots: Dict[str, "_Hash"]) -> "NoReturn": raise HashMismatch(self._allowed, gots) def check_against_file(self, file: BinaryIO) -> None: """Check good hashes against a file-like object Raise Ha