Edit File: hashes.cpython-36.pyc
3 �Pf2 � @ sz d dl mZ d dlZd dlmZmZmZ d dlmZ d dl m Z m Z m Z dZ dddgZG d d � d e�ZG d d � d e�ZdS ) � )�absolute_importN)� HashMismatch� HashMissing�InstallationError)� read_chunks)� iteritems�iterkeys� itervaluesZsha256Zsha384Zsha512c @ sJ e Zd ZdZddd�Zdd� Zdd� Zd d � Zd d � Zd d� Z dd� Z dS )�HasheszaA wrapper that builds multiple hashes at once and checks them against known-good values Nc C s |dkr i n|| _ dS )zo :param hashes: A dict of algorithm names pointing to lists of allowed hex digests N)�_allowed)�self�hashes� r � /usr/lib/python3.6/hashes.py�__init__ s zHashes.__init__c C s� i }xJt | j�D ]<}ytj|�||< W q ttfk rJ td| ��Y qX qW x(|D ] }xt|�D ]}|j|� qdW qVW x*t |�D ] \}}|j � | j| kr�dS q�W | j |� dS )z�Check good hashes against ones built from iterable of chunks of data. Raise HashMismatch if none match. zUnknown hash name: %sN) r r �hashlib�new� ValueError� TypeErrorr r �updater � hexdigest�_raise)r Zchunks�gotsZ hash_name�chunk�hashZgotr r r �check_against_chunks s zHashes.check_against_chunksc C s t | j|��d S )N)r r )r r r r r r 7 s z Hashes._raisec C s | j t|��S )zaCheck good hashes against a file-like object Raise HashMismatch if none match. )r r )r �filer r r �check_against_file: s zHashes.check_against_filec C s t |d�� }| j|�S Q R X d S )N�rb)�openr )r �pathr r r r �check_against_pathB s zHashes.check_against_pathc C s t | j�S )z,Return whether I know any known-good hashes.)�boolr )r r r r � __nonzero__F s zHashes.__nonzero__c C s | j � S )N)r# )r r r r �__bool__J s zHashes.__bool__)N) �__name__� __module__� __qualname__�__doc__r r r r r! r# r$ r r r r r s r c s( e Zd ZdZ� fdd�Zdd� Z� ZS )� MissingHashesz�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. c s t t| �jtg id� dS )z!Don't offer the ``hashes`` kwarg.)r N)�superr) r � FAVORITE_HASH)r )� __class__r r r U s zMissingHashes.__init__c C s t |t j� ��d S )N)r r+ r )r r r r r r [ s zMissingHashes._raise)r% r& r' r( r r � __classcell__r r )r, r r) N s r) )Z __future__r r Zpip.exceptionsr r r Z pip.utilsr Zpip._vendor.sixr r r r+ Z STRONG_HASHES�objectr r) r r r r �<module> s :
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