3

gf                 @   s   d dl mZ d dlZd dlmZmZmZ d dlmZm	Z	m
Z
 d dlmZ d dlmZ erd dlmZmZmZmZmZ d dlmZ erd d	lmZ nd d
lmZ dZdddgZG dd deZG dd deZdS )    )absolute_importN)	iteritemsiterkeys
itervalues)HashMismatchHashMissingInstallationError)read_chunks)MYPY_CHECK_RUNNING)DictListBinaryIONoReturnIterator)PY3)_Hash)_hashsha256sha384sha512c               @   s^   e Zd ZdZdddZedd Zdd Zd	d
 Zdd Z	dd Z
dd Zdd Zdd ZdS )HasheszaA wrapper that builds multiple hashes at once and checks them against
    known-good values

    Nc             C   s   |dkri n|| _ dS )zo
        :param hashes: A dict of algorithm names pointing to lists of allowed
            hex digests
        N)_allowed)selfhashes r   >/tmp/pip-unpacked-wheel-v59g9nu1/pip/_internal/utils/hashes.py__init__)   s    zHashes.__init__c             C   s   t dd | jj D S )Nc             s   s   | ]}t |V  qd S )N)len).0digestsr   r   r   	<genexpr>4   s    z&Hashes.digest_count.<locals>.<genexpr>)sumr   values)r   r   r   r   digest_count1   s    zHashes.digest_countc             C   s   || j j|g kS )z/Return whether the given hex digest is allowed.)r   get)r   	hash_name
hex_digestr   r   r   is_hash_allowed6   s    zHashes.is_hash_allowedc             C   s   i }xJt | jD ]<}ytj|||< W q ttfk
rJ   td| Y qX qW x(|D ] }xt|D ]}|j| qdW qVW x*t	|D ]\}}|j
 | j| krdS qW | j| dS )zCheck good hashes against ones built from iterable of chunks of
        data.

        Raise HashMismatch if none match.

        zUnknown hash name: %sN)r   r   hashlibnew
ValueError	TypeErrorr   r   updater   	hexdigest_raise)r   chunksgotsr%   chunkhashgotr   r   r   check_against_chunks?   s    
zHashes.check_against_chunksc             C   s   t | j|d S )N)r   r   )r   r0   r   r   r   r.   W   s    zHashes._raisec             C   s   | j t|S )zaCheck good hashes against a file-like object

        Raise HashMismatch if none match.

        )r4   r	   )r   filer   r   r   check_against_file[   s    zHashes.check_against_filec          	   C   s    t |d}| j|S Q R X d S )Nrb)openr6   )r   pathr5   r   r   r   check_against_pathd   s    zHashes.check_against_pathc             C   s
   t | jS )z,Return whether I know any known-good hashes.)boolr   )r   r   r   r   __nonzero__i   s    zHashes.__nonzero__c             C   s   | j  S )N)r<   )r   r   r   r   __bool__n   s    zHashes.__bool__)N)__name__
__module____qualname____doc__r   propertyr#   r'   r4   r.   r6   r:   r<   r=   r   r   r   r   r   $   s   
		r   c                   s(   e Zd ZdZ fddZdd Z  ZS )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.

    c                s   t t| jtg id dS )z!Don't offer the ``hashes`` kwarg.)r   N)superrC   r   FAVORITE_HASH)r   )	__class__r   r   r   z   s    zMissingHashes.__init__c             C   s   t |t j d S )N)r   rE   r-   )r   r0   r   r   r   r.      s    zMissingHashes._raise)r>   r?   r@   rA   r   r.   __classcell__r   r   )rF   r   rC   s   s   rC   )
__future__r   r(   pip._vendor.sixr   r   r   pip._internal.exceptionsr   r   r   pip._internal.utils.miscr	   pip._internal.utils.typingr
   typingr   r   r   r   r   r   r   r   rE   STRONG_HASHESobjectr   rC   r   r   r   r   <module>   s   
O