B UvgT @szddlmZddlZddlmZmZmZddlmZm Z m Z ddl m Z dZ dddgZGd d d eZGd d d eZdS) )absolute_importN) iteritemsiterkeys itervalues) HashMismatch HashMissingInstallationError) read_chunkssha256sha384sha512c@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-install-r_9ig3yj/pip/pip/_internal/utils/hashes.py__init__szHashes.__init__c Csi}xJt|jD]<}yt|||<Wqttfk rJtd|YqXqWx(|D] }xt|D]}||qdWqVWx*t |D]\}}| |j|krdSqW| |dS)zCheck good hashes against ones built from iterable of chunks of data. Raise HashMismatch if none match. zUnknown hash name: %sN) rrhashlibnew ValueError TypeErrorrrupdater hexdigest_raise)rchunksgots hash_namechunkhashgotrrrcheck_against_chunks"s zHashes.check_against_chunkscCst|j|dS)N)rr)rrrrrr9sz 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 }||SQRXdS)Nrb)openr#)rpathr"rrrcheck_against_pathDs zHashes.check_against_pathcCs t|jS)z,Return whether I know any known-good hashes.)boolr)rrrr __nonzero__HszHashes.__nonzero__cCs|S)N)r))rrrr__bool__LszHashes.__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)superr/r FAVORITE_HASH)r) __class__rrrWszMissingHashes.__init__cCst|tdS)N)rr1r)rrrrrr]szMissingHashes._raise)r+r,r-r.rr __classcell__rr)r2rr/Ps r/) __future__rrZpip._vendor.sixrrrpip._internal.exceptionsrrrpip._internal.utils.miscr r1 STRONG_HASHESobjectr r/rrrrs   :