B
    `d                 @   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-hu9qqap1/pip/_internal/utils/hashes.py__init__)   s    zHashes.__init__c             C   s   t dd | 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 |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 }xLt | jD ]>}yt|||< W q ttfk
rL   td|Y qX qW x(|D ] }xt|D ]}|	| qfW qXW x*t
|D ]\}}| | j| krdS qW | | dS )zCheck good hashes against ones built from iterable of chunks of
        data.

        Raise HashMismatch if none match.

        zUnknown hash name: {}N)r   r   hashlibnew
ValueError	TypeErrorr   formatr   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   r1   r   r   r   r/   Y   s    zHashes._raisec             C   s   |  t|S )zaCheck good hashes against a file-like object

        Raise HashMismatch if none match.

        )r5   r	   )r   filer   r   r   check_against_file]   s    zHashes.check_against_filec          	   C   s    t |d}| |S Q R X d S )Nrb)openr7   )r   pathr6   r   r   r   check_against_pathf   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__k   s    zHashes.__nonzero__c             C   s   |   S )N)r=   )r   r   r   r   __bool__p   s    zHashes.__bool__)N)__name__
__module____qualname____doc__r   propertyr#   r'   r5   r/   r7   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)superrD   r   FAVORITE_HASH)r   )	__class__r   r   r   |   s    zMissingHashes.__init__c             C   s   t |t  d S )N)r   rF   r.   )r   r1   r   r   r   r/      s    zMissingHashes._raise)r?   r@   rA   rB   r   r/   __classcell__r   r   )rG   r   rD   u   s   rD   )
__future__r   r(   Z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   rF   STRONG_HASHESobjectr   rD   r   r   r   r   <module>   s   
Q