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B �5�g� � @ s� d dl Z d dlmZmZmZmZmZmZ d dlm Z m Z m Z d dl m Z erdd dl mZ d dlmZ dZddd gZG d d � d �ZG d d � d e�ZdS )� N)� TYPE_CHECKING�BinaryIO�Dict�Iterable�List�Optional)� HashMismatch� HashMissing�InstallationError)� read_chunks)�_Hash)�NoReturn�sha256�sha384�sha512c @ s� e Zd ZdZd%eeeee f dd�dd�Zd d d�dd�Z e e d �d d ��Z eee d �d d�Zee dd�dd�Zeedf dd�dd�Zedd�dd�Zedd�dd �Zeeef e d�d d �Ze d �d d �Zee d�d!d"�Ze d �d#d$�ZdS )&�HasheszaA wrapper that builds multiple hashes at once and checks them against known-good values N)�hashes�returnc C s8 i }|dk r.x |� � D ]\}}t|�||< qW || _dS )zo :param hashes: A dict of algorithm names pointing to lists of allowed hex digests N)�items�sorted�_allowed)�selfr �allowed�alg�keys� r �;/tmp/pip-install-251nq386/pip/pip/_internal/utils/hashes.py�__init__ s zHashes.__init__)�otherr c sf t |t�stS |s�S �s |S i }x:|j�� D ],\� }� �jkrBq.� �fdd�|D �|� < q.W t|�S )Nc s g | ]}|�j � kr|�qS r )r )�.0�v)r r r r � <listcomp>; s z"Hashes.__and__.<locals>.<listcomp>)� isinstancer �NotImplementedr r )r r �new�valuesr )r r r �__and__+ s zHashes.__and__)r c C s t dd� | j�� D ��S )Nc s s | ]}t |�V qd S )N)�len)r Zdigestsr r r � <genexpr>@ s z&Hashes.digest_count.<locals>.<genexpr>)�sumr r% )r r r r � digest_count> s zHashes.digest_count)� hash_name� hex_digestr c C s || j �|g �kS )z/Return whether the given hex digest is allowed.)r �get)r r+ r, r r r �is_hash_allowedB s zHashes.is_hash_allowed)�chunksr c C s� i }xL| j �� D ]>}yt�|�||< W q ttfk rL td|� ���Y qX qW x(|D ] }x|�� D ]}|�|� qfW qXW x*|� � D ] \}}|� � | j | kr�dS q�W | � |� dS )z�Check good hashes against ones built from iterable of chunks of data. Raise HashMismatch if none match. zUnknown hash name: N) r r �hashlibr$ � ValueError� TypeErrorr r% �updater � hexdigest�_raise)r r/ �gotsr+ �chunk�hash�gotr r r �check_against_chunksF s zHashes.check_against_chunksr r )r6 r c C s t | j|��d S )N)r r )r r6 r r r r5 ] s z Hashes._raise)�filer c C s | � t|��S )zaCheck good hashes against a file-like object Raise HashMismatch if none match. )r: r )r r; r r r �check_against_file` s zHashes.check_against_file)�pathr c C s t |d�� }| �|�S Q R X d S )N�rb)�openr< )r r= r; r r r �check_against_pathh s zHashes.check_against_pathc C s* x$|� � D ]\}}| �||�r dS q W dS )z3Return whether any of the given hashes are allowed.TF)r r. )r r r+ r, r r r � has_one_ofl s zHashes.has_one_ofc C s t | j�S )z,Return whether I know any known-good hashes.)�boolr )r r r r �__bool__s s zHashes.__bool__c C s t |t�stS | j|jkS )N)r" r r# r )r r r r r �__eq__w s z Hashes.__eq__c C s" t d�tdd� | j�� D ����S )N�,c s s* | ]"\}}|D ]}d � ||f�V qqdS )�:N)�join)r r Z digest_list�digestr r r r( � s z"Hashes.__hash__.<locals>.<genexpr>)r8 rG r r r )r r r r �__hash__| s zHashes.__hash__)N)�__name__� __module__� __qualname__�__doc__r r �strr r r& �property�intr* rB r. r �bytesr: r5 r r< r@ rA rC �objectrD rI r r r r r s " r c s> e Zd ZdZdd�� fdd� Zeedf dd�d d �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. N)r c s t � jtg id� dS )z!Don't offer the ``hashes`` kwarg.)r N)�superr � FAVORITE_HASH)r )� __class__r r r � s zMissingHashes.__init__r r )r6 r c C s t |t �� ��d S )N)r rU r4 )r r6 r r r r5 � s zMissingHashes._raise) rJ rK rL rM r r rN r5 � __classcell__r r )rV r rS � s rS )r0 �typingr r r r r r �pip._internal.exceptionsr r r �pip._internal.utils.miscr r r rU � STRONG_HASHESr rS r r r r �<module> s o
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