U KQh2 @szddlmZddlZddlmZmZmZddlmZddl m Z m Z m Z dZ dddgZGd d d eZGd d d eZdS) )absolute_importN) HashMismatch HashMissingInstallationError) read_chunks) iteritemsiterkeys itervaluessha256sha384sha512c@sJeZdZdZdddZddZddZd d Zd d Zd dZ ddZ dS)HasheszaA wrapper that builds multiple hashes at once and checks them against known-good values NcCs|dkr in||_dS)zo :param hashes: A dict of algorithm names pointing to lists of allowed hex digests N)_allowed)selfhashesr//tmp/pip-build-tlro1kwj/pip/pip/utils/hashes.py__init__szHashes.__init__c Csi}t|jD]<}zt|||<Wqttfk rHtd|YqXq|D]}t|D]}||q\qPt |D] \}}| |j|krvdSqv| |dS)zCheck good hashes against ones built from iterable of chunks of data. Raise HashMismatch if none match. zUnknown hash name: %sN) rrhashlibnew ValueError TypeErrorrr updater hexdigest_raise)rchunksgots hash_namechunkhashgotrrrcheck_against_chunks s zHashes.check_against_chunkscCst|j|dSN)rrrrrrrr7sz Hashes._raisecCs|t|S)zaCheck good hashes against a file-like object Raise HashMismatch if none match. )r!r)rfilerrrcheck_against_file:szHashes.check_against_filec Cs,t|d}||W5QRSQRXdS)Nrb)openr%)rpathr$rrrcheck_against_pathBs zHashes.check_against_pathcCs t|jS)z,Return whether I know any known-good hashes.)boolrrrrr __nonzero__FszHashes.__nonzero__cCs|Sr")r,r+rrr__bool__JszHashes.__bool__)N) __name__ __module__ __qualname____doc__rr!rr%r)r,r-rrrrr s r cs(eZdZdZfddZddZZS) MissingHasheszA 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. cstt|jtgiddS)z!Don't offer the ``hashes`` kwarg.)rN)superr2r FAVORITE_HASHr+ __class__rrrUszMissingHashes.__init__cCst|tdSr")rr4rr#rrrr[szMissingHashes._raise)r.r/r0r1rr __classcell__rrr5rr2Ns r2) __future__rrpip.exceptionsrrr pip.utilsrZpip._vendor.sixrrr r4 STRONG_HASHESobjectr r2rrrrs   :