U
    öEZh-  ã                   @   sF   d dl Z d dlmZ d dlmZmZmZ d dlmZ G dd„ dƒZ	dS )é    N)Úutils)ÚAlreadyFinalizedÚUnsupportedAlgorithmÚ_Reasons)Ú_Poly1305Contextc                   @   s†   e Zd ZU eje ed< edœdd„Zeddœdd„Z	ed	œd
d„Z
eddœdd„Zeeeedœdd„ƒZeeeeddœdd„ƒZdS )ÚPoly1305Ú_ctx)Úkeyc                 C   s0   ddl m} | ¡ s tdtjƒ‚| |¡| _d S )Nr   )Úbackendz5poly1305 is not supported by this version of OpenSSL.)Z,cryptography.hazmat.backends.openssl.backendr
   Zpoly1305_supportedr   r   ZUNSUPPORTED_MACZcreate_poly1305_ctxr   )Úselfr	   r
   © r   ún/home/aprabhat/apps/x.techxrdev.in/venv/lib/python3.8/site-packages/cryptography/hazmat/primitives/poly1305.pyÚ__init__   s    þzPoly1305.__init__N)ÚdataÚreturnc                 C   s.   | j d krtdƒ‚t d|¡ | j  |¡ d S )NúContext was already finalized.r   )r   r   r   Z_check_byteslikeÚupdate)r   r   r   r   r   r      s    
zPoly1305.update)r   c                 C   s&   | j d krtdƒ‚| j  ¡ }d | _ |S )Nr   )r   r   Úfinalize)r   Úmacr   r   r   r   #   s
    

zPoly1305.finalize)Útagr   c                 C   s:   t  d|¡ | jd krtdƒ‚| jd  }| _| |¡ d S )Nr   r   )r   Ú_check_bytesr   r   Úverify)r   r   Úctxr   r   r   r   *   s
    
zPoly1305.verify)r	   r   r   c                 C   s   t |ƒ}| |¡ | ¡ S ©N)r   r   r   )Úclsr	   r   Úpr   r   r   Úgenerate_tag2   s    
zPoly1305.generate_tag)r	   r   r   r   c                 C   s    t |ƒ}| |¡ | |¡ d S r   )r   r   r   )r   r	   r   r   r   r   r   r   Ú
verify_tag8   s    
zPoly1305.verify_tag)Ú__name__Ú
__module__Ú__qualname__ÚtypingÚOptionalr   Ú__annotations__Úbytesr   r   r   r   Úclassmethodr   r   r   r   r   r   r      s   

r   )
r!   Zcryptographyr   Zcryptography.exceptionsr   r   r   Z-cryptography.hazmat.backends.openssl.poly1305r   r   r   r   r   r   Ú<module>   s   