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Editing: low_level.cpython-38.pyc
U ��`T6 � @ s� d Z ddlZddlZddlZddlZddlZddlZddlZddlZddl m Z m Z m Z e� dej�Zdd� Zdd � Zd d � Zd d � Zdd� Zd&dd�Zdd� Zdd� Zdd� Zdd� Zdd� Zd d � Zd d d d!d"d#�Z d$d%� Z dS )'a� Low-level helpers for the SecureTransport bindings. These are Python functions that are not directly related to the high-level APIs but are necessary to get them to work. They include a whole bunch of low-level CoreFoundation messing about and memory management. The concerns in this module are almost entirely about trying to avoid memory leaks and providing appropriate and useful assistance to the higher-level code. � N� )�CFConst�CoreFoundation�Securitys; -----BEGIN CERTIFICATE----- (.*?) -----END CERTIFICATE-----c C s t �t j| t| ��S )zv Given a bytestring, create a CFData object from it. This CFData object must be CFReleased by the caller. )r � CFDataCreate�kCFAllocatorDefault�len)Z bytestring� r �[/opt/alt/python38/lib/python3.8/site-packages/urllib3/contrib/_securetransport/low_level.py�_cf_data_from_bytes s �r c C sZ t | �}dd� | D �}dd� | D �}tj| |� }tj| |� }t�tj|||tjtj�S )zK Given a list of Python tuples, create an associated CFDictionary. c s s | ]}|d V qdS )r Nr ��.0�tr r r � <genexpr>, s z-_cf_dictionary_from_tuples.<locals>.<genexpr>c s s | ]}|d V qdS )r Nr r r r r r - s )r r � CFTypeRefZCFDictionaryCreater Z kCFTypeDictionaryKeyCallBacksZ kCFTypeDictionaryValueCallBacks)ZtuplesZdictionary_size�keys�valuesZcf_keysZ cf_valuesr r r �_cf_dictionary_from_tuples% s �r c C s t �| �}t�tj|tj�}|S )zi Given a Python binary data, create a CFString. The string must be CFReleased by the caller. )�ctypes�c_char_pr ZCFStringCreateWithCStringr r �kCFStringEncodingUTF8)Zpy_bstrZc_str�cf_strr r r �_cfstr; s �r c C s� d}zdt �t jdt�t j��}|s*td��| D ]6}t|�}|sFtd��zt � ||� W 5 t �|� X q.W n@ t k r� } z"|r�t �|� t � d|f ��W 5 d}~X Y nX |S )z� Given a list of Python binary data, create an associated CFMutableArray. The array must be CFReleased by the caller. Raises an ssl.SSLError on failure. Nr �Unable to allocate memory!z Unable to allocate array: %s) r �CFArrayCreateMutabler r �byref�kCFTypeArrayCallBacks� MemoryErrorr � CFRelease�CFArrayAppendValue� BaseException�ssl�SSLError)�lstZcf_arr�itemr �er r r �_create_cfstring_arrayI s* � "r& c C sn t �| t �t j��}t�|tj�}|dkrXt �d�}t� ||dtj�}|sRt d��|j }|dk rj|� d�}|S )z� Creates a Unicode string from a CFString object. Used entirely for error reporting. Yes, it annoys me quite a lot that this function is this complex. Ni z'Error copying C string from CFStringRef�utf-8) r �cast�POINTER�c_void_pr ZCFStringGetCStringPtrr r �create_string_bufferZCFStringGetCString�OSError�value�decode)r- Zvalue_as_void_p�string�buffer�resultr r r �_cf_string_to_unicodeh s& � � r2 c C s\ | dkr dS t �| d�}t|�}t�|� |dks:|dkrBd| }|dkrPtj}||��dS )z[ Checks the return code and throws an exception if there is an error to report r N� z OSStatus %s)r ZSecCopyErrorMessageStringr2 r r r! r" )�errorZexception_classZcf_error_string�outputr r r �_assert_no_error� s r6 c C s� | � dd�} dd� t�| �D �}|s.t�d��t�tjdt� tj ��}|sTt�d��z`|D ]V}t |�}|stt�d��t � tj|�}t�|� |s�t�d��t�||� t�|� qZW n tk r� t�|� Y nX |S ) z� Given a bundle of certs in PEM format, turns them into a CFArray of certs that can be used to validate a cert chain. s � c S s g | ]}t �|�d ���qS )r )�base64� b64decode�group)r �matchr r r � <listcomp>� s z(_cert_array_from_pem.<locals>.<listcomp>z No root certificates specifiedr r z Unable to build cert object!)�replace� _PEM_CERTS_RE�finditerr! r" r r r r r r r r Z SecCertificateCreateWithDatar r � Exception)Z pem_bundleZ der_certsZ cert_arrayZ der_bytesZcertdataZcertr r r �_cert_array_from_pem� s< � � � rA c C s t �� }t�| �|kS )z= Returns True if a given CFTypeRef is a certificate. )r ZSecCertificateGetTypeIDr � CFGetTypeID�r$ Zexpectedr r r �_is_cert� s rD c C s t �� }t�| �|kS )z; Returns True if a given CFTypeRef is an identity. )r ZSecIdentityGetTypeIDr rB rC r r r � _is_identity� s rE c C s� t �d�} t�| dd� ��d�}t�| dd� �}t�� }t j�||�� d�}t � � }t � |t |�|ddt�|��}t|� ||fS )a� This function creates a temporary Mac keychain that we can use to work with credentials. This keychain uses a one-time password and a temporary file to store the data. We expect to have one keychain per socket. The returned SecKeychainRef must be freed by the caller, including calling SecKeychainDelete. Returns a tuple of the SecKeychainRef and the path to the temporary directory that contains it. �( N� r' F)�os�urandomr8 � b16encoder. �tempfile�mkdtemp�path�join�encoder ZSecKeychainRefZSecKeychainCreater r r r6 )Z random_bytes�filename�passwordZ tempdirectoryZ keychain_path�keychain�statusr r r �_temporary_keychain� s �rT c C s g }g }d}t |d��}|�� }W 5 Q R X z�t�tj|t|��}t�� }t� |ddddd| t � |��}t |� t� |�} t| �D ]X} t�|| �} t �| tj�} t| �r�t�| � |�| � q�t| �r�t�| � |�| � q�W 5 |r�t�|� t�|� X ||fS )z� Given a single file, loads all the trust objects from it into arrays and the keychain. Returns a tuple of lists: the first list is a list of identities, the second a list of certs. N�rbr )�open�readr r r r r Z CFArrayRefr Z SecItemImportr r r6 ZCFArrayGetCount�rangeZCFArrayGetValueAtIndexr( r rD ZCFRetain�appendrE ) rR rM � certificates� identitiesZ result_array�fZ raw_filedataZfiledatar1 Z result_count�indexr$ r r r �_load_items_from_file� sJ �� r^ c G s� g }g }dd� |D �}z�|D ]&}t| |�\}}|�|� |�|� q |s�t�� }t�| |d t � |��} t | � |� |� t�|� d�� t�tjdt � tj��} t �||�D ]} t�| | � q�| W �S t �||�D ]}t�|� q�X dS )z� Load certificates and maybe keys from a number of files. Has the end goal of returning a CFArray containing one SecIdentityRef, and then zero or more SecCertificateRef objects, suitable for use as a client certificate trust chain. c s s | ]}|r|V qd S )Nr )r rM r r r r Q s z*_load_client_cert_chain.<locals>.<genexpr>r N)� itertools�chainr r r^ �extendr ZSecIdentityRefZ SecIdentityCreateWithCertificater r r6 rY �popr r r r ) rR �pathsrZ r[ �obj� file_pathZnew_identitiesZ new_certsZ new_identityrS Z trust_chainr$ r r r �_load_client_cert_chain- s8 � �rf )r � )� r )rh r )rh rg )rh rh )ZSSLv2ZSSLv3ZTLSv1zTLSv1.1zTLSv1.2c C sH t | \}}d}d}t�d||�}t|�}d}t�d||||�| }|S )z6 Builds a TLS alert record for an unknown CA. rg �0 z>BB� z>BBBH)�TLS_PROTOCOL_VERSIONS�struct�packr ) �versionZver_majZver_minZseverity_fatalZdescription_unknown_ca�msgZmsg_lenZrecord_type_alert�recordr r r �_build_tls_unknown_ca_alert� s rq )N) �__doc__r8 r r_ rH �rer! rl rK Zbindingsr r r �compile�DOTALLr> r r r r& r2 r6 rA rD rE rT r^ rf rk rq r r r r �<module> s@ � -#7L�
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