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pyopenssl.cpython-38.pyc
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U ��.e8@ � @ s\ d Z ddlmZ ddlZddlmZ ddlmZ ddl m Z zddl m Z W n$ ek rp G dd � d e�Z Y nX dd lmZmZ dd lmZ zdd lmZ W n$ ek r� dZd dlmZ Y nX ddlZddlZd dlm Z ddl Z d dl m Z ddgZ dZ!e j"ej#j$ej%ej#j&iZ'e(ed��r@e(ej#d��r@ej#j)e'ej*< e(ed��rhe(ej#d��rhej#j+e'ej,< e(ed��r�e(ej#d��r�ej#j-e'ej.< ej/ej#j0ej1ej#j2ej3ej#j2ej#j4 iZ5e6dd� e5�7� D ��Z8d Z9e j!Z:e j;j<Z=e�>e?�Z@d d� ZAd d� ZBd d � ZCd!d"� ZDd#d$� ZEG d%d&� d&eF�ZGe�r6d.d(d)�ZHneZHeHeG_HG d*d+� d+eF�ZId,d-� ZJdS )/ab SSL with SNI_-support for Python 2. Follow these instructions if you would like to verify SSL certificates in Python 2. Note, the default libraries do *not* do certificate checking; you need to do additional work to validate certificates yourself. This needs the following packages installed: * pyOpenSSL (tested with 16.0.0) * cryptography (minimum 1.3.4, from pyopenssl) * idna (minimum 2.0, from cryptography) However, pyopenssl depends on cryptography, which depends on idna, so while we use all three directly here we end up having relatively few packages required. You can install them with the following command: pip install pyopenssl cryptography idna To activate certificate checking, call :func:`~urllib3.contrib.pyopenssl.inject_into_urllib3` from your Python code before you begin making HTTP requests. This can be done in a ``sitecustomize`` module, or at any other time before your application begins using ``urllib3``, like this:: try: import urllib3.contrib.pyopenssl urllib3.contrib.pyopenssl.inject_into_urllib3() except ImportError: pass Now you can use :mod:`urllib3` as you normally would, and it will support SNI when the required modules are installed. Activating this module also has the positive side effect of disabling SSL/TLS compression in Python 2 (see `CRIME attack`_). If you want to configure the default list of supported cipher suites, you can set the ``urllib3.contrib.pyopenssl.DEFAULT_SSL_CIPHER_LIST`` variable. .. _sni: https://en.wikipedia.org/wiki/Server_Name_Indication .. _crime attack: https://en.wikipedia.org/wiki/CRIME_(security_exploit) � )�absolute_importN)�x509)�backend)� _Certificate)�UnsupportedExtensionc @ s e Zd ZdS )r N)�__name__� __module__� __qualname__� r r �I/usr/lib/python3.8/site-packages/pip/_vendor/urllib3/contrib/pyopenssl.pyr 7 s r )�timeout�error)�BytesIO)� _fileobject� )�backport_makefile)�six)�util�inject_into_urllib3�extract_from_urllib3T�PROTOCOL_SSLv3� SSLv3_METHOD�PROTOCOL_TLSv1_1�TLSv1_1_METHOD�PROTOCOL_TLSv1_2�TLSv1_2_METHODc c s | ]\}}||fV qd S �Nr )�.0�k�vr r r � <genexpr>g s r i @ c C s4 t � tt_ttj_tt_ttj_dt_dtj_dS )z7Monkey-patch urllib3 with PyOpenSSL-backed SSL-support.TN)�_validate_dependencies_met�PyOpenSSLContextr � SSLContext�ssl_�HAS_SNI� IS_PYOPENSSLr r r r r s s c C s. t t_t tj_tt_ttj_dt_dtj_dS )z4Undo monkey-patching by :func:`inject_into_urllib3`.FN)�orig_util_SSLContextr r# r$ �orig_util_HAS_SNIr% r& r r r r r � s c C sR ddl m} t| dd�dkr$td��ddlm} |� }t|dd�dkrNtd��dS ) z{ Verifies that PyOpenSSL's package-level dependencies have been met. 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If the name cannot be idna-encoded then we return None signalling that the name given should be skipped. c S sv ddl m} zJdD ]8}| �|�r| t|�d� } |�d�|�| � W S q|�| �W S |jjk rp Y dS X dS )z� Borrowed wholesale from the Python Cryptography Project. It turns out that we can't just safely call `idna.encode`: it can explode for wildcard names. This avoids that problem. r )�idna)z*.�.N�ascii)Z pip._vendorr/ � startswith�len�encodeZcoreZ IDNAError)�namer/ �prefixr r r � idna_encode� s z'_dnsname_to_stdlib.<locals>.idna_encode�:N)� r �utf-8)�sys� version_info�decode)r5 r7 r r r �_dnsname_to_stdlib� s r> c C s� t | d�r| �� }n tt| j�}z|j�tj�j }W nZ tj k rN g Y S tj t tj tfk r� } zt�d|� g W Y �S d}~X Y nX dd� tt|�tj��D �}|�dd� |�tj�D �� |S )zU Given an PyOpenSSL certificate, provides all the subject alternative names. �to_cryptographyz�A problem was encountered with the certificate that prevented urllib3 from finding the SubjectAlternativeName field. This can affect certificate validation. 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