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The only way to resolve this is to give macOS users an alternative solution to the problem, and that solution is to use SecureTransport. We use ctypes here because this solution must not require a compiler. That's because pip is not allowed to require a compiler either. This is not intended to be a seriously long-term solution to this problem. The hope is that PEP 543 will eventually solve this issue for us, at which point we can retire this contrib module. But in the short term, we need to solve the impending tire fire that is Python on Mac without this kind of contrib module. So...here we are. To use this module, simply import and inject it:: import urllib3.contrib.securetransport urllib3.contrib.securetransport.inject_into_urllib3() Happy TLSing! � )�absolute_importN� )�util� )�Security� SecurityConst�CoreFoundation)�_assert_no_error�_cert_array_from_pem�_temporary_keychain�_load_client_cert_chain)� _fileobject)�backport_makefile�inject_into_urllib3�extract_from_urllib3Ti @ �PROTOCOL_SSLv2�PROTOCOL_SSLv3�PROTOCOL_TLSv1�PROTOCOL_TLSv1_1�PROTOCOL_TLSv1_2� PROTOCOL_TLSc C s( t tj_tt_ttj_dt_dtj_dS )zG Monkey-patch urllib3 with SecureTransport-backed SSL-support. TN)�SecureTransportContextr �ssl_� SSLContext�HAS_SNI�IS_SECURETRANSPORT� r r �%/usr/lib/python3.6/securetransport.pyr � s c C s( t tj_tt_ttj_dt_dtj_dS )z> Undo monkey-patching by :func:`inject_into_urllib3`. 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Nr z timed out)�_connection_refs�getr �errSSLInternal�socket� gettimeoutr Z wait_for_read�error�errno�EAGAIN�ctypes�c_charZ from_address� recv_into�errSSLClosedGraceful� ECONNRESET�EPIPE�errSSLClosedAbort�errSSLWouldBlock� Exception� _exception) � connection_id� data_buffer�data_length_pointer�wrapped_socket� base_socketZrequested_length�timeoutr% Z read_countZ remaining�bufferZ chunk_size�er r r �_read_callback� sN r: c C s\ d}�y t j| �}|dkr tjS |j}|d }tj||�}|j� }d}d} yZxT| |k r�|dksf|dkr�tj ||�s�tj t j d��|j |�} | | 7 } || d� }qNW W nb tj k �r } zB| j }|dk r�|t j kr�| |d< |t jks�|t jkr�tjS � W Y dd} ~ X nX | |d< | |k�r tjS dS tk �rV } z|dk �rF| |_tjS d} ~ X nX dS )zx SecureTransport write callback. This is called by ST to request that data actually be sent on the network. Nr z timed out)r r! r r" r# r( � string_atr$ r Zwait_for_writer% r& r' �sendr, r- r. r/ r0 r1 ) r2 r3 r4 r5 r6 Zbytes_to_write�datar7 r% �sentZ chunk_sentr9 r r r �_write_callback� sD r? c @ s� e Zd ZdZdd� Zejdd� �Zdd� Zdd � Z d d � Z d d � Z dd� Z dd� Z d(dd�Zdd� Zdd� Zdd� Zdd � Zd d � Zd d � Zd)d"d#�Zd$d%� Zd&d'� ZdS )*� WrappedSocketz� API-compatibility wrapper for Python's OpenSSL wrapped socket object. Note: _makefile_refs, _drop(), and _reuse() are needed for the garbage collector of PyPy. c C sL || _ d | _d| _d| _d | _d | _d | _d | _| j j� | _ | j j d� d S )Nr F) r# �context�_makefile_refs�_closedr1 � _keychain� _keychain_dir�_client_cert_chainr$ �_timeout� settimeout)�selfr# r r r �__init__( s zWrappedSocket.__init__c c s4 d| _ dV | j dk r0| j d }| _ | j� |�dS )a] A context manager that can be used to wrap calls that do I/O from SecureTransport. If any of the I/O callbacks hit an exception, this context manager will correctly propagate the exception after the fact. This avoids silently swallowing those exceptions. It also correctly forces the socket closed. N)r1 �close)rI Z exceptionr r r �_raise_on_error: s z WrappedSocket._raise_on_errorc C s2 t jtt� t� }t j| j|tt��}t|� dS )a4 Sets up the allowed ciphers. By default this matches the set in util.ssl_.DEFAULT_CIPHERS, at least as supported by macOS. This is done custom and doesn't allow changing at this time, mostly because parsing OpenSSL cipher strings is going to be a freaking nightmare. N)r ZSSLCipherSuite�len� CIPHER_SUITESZSSLSetEnabledCiphersrA r )rI �ciphers�resultr r r � _set_ciphersO s zWrappedSocket._set_ciphersc C s |sdS t jj|�r2t|d��}|j� }W dQ R X d}tj� }z�t|�}tj| j t j |��}t |� |srt jd��tj||�}t |� tj|d�}t |� tj� }tj|t j |��}t |� W d|r�tj|� |dk r�tj|� X tjtjf}|j|k�r t jd|j ��dS )z� Called when we have set custom validation. We do this in two cases: first, when cert validation is entirely disabled; and second, when using a custom trust DB. N�rbz Failed to copy trust referenceTz)certificate verify failed, error code: %d)�os�path�isfile�open�readr � SecTrustRefr �SSLCopyPeerTrustrA r( �byrefr �sslZSSLErrorZ SecTrustSetAnchorCertificatesZ!SecTrustSetAnchorCertificatesOnlyZSecTrustResultTypeZSecTrustEvaluater � CFReleaser ZkSecTrustResultUnspecifiedZkSecTrustResultProceed�value) rI �verify� trust_bundle�fZ cert_array�trustrP Z trust_resultZ successesr r r �_custom_validate\ s@ z WrappedSocket._custom_validatec C s� t jdtjtj�| _t j| jtt�} t | � t �4 t | �d } x| t krV| d d } q@W | t | < W dQ R X t j | j| �} t | � |r�t|t�s�|jd�}t j| j|t|��} t | � | j� t j| j|�} t | � t j| j|�} t | � | s�|dk �rt j| jtjd�} t | � |�rNt� \| _| _t| j||�| _ t j | j| j �} t | � xf| j � �R t j | j�} | tj k�r~t!j"d��n(| tj#k�r�| j$||� �wPn t | � P W dQ R X �qPW dS )z� Actually performs the TLS handshake. This is run automatically by wrapped socket, and shouldn't be needed in user code. 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Z SSLReadFuncrc Z SSLWriteFuncrd �objectr@ r� r r r r r �<module> s� 76
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