o
    bw	                     @   sf   d dl Z d dlmZ d dlmZmZmZ d dlmZ d dl	m
Z
mZ d dlmZ G dd dejZdS )	    N)utils)AlreadyFinalizedUnsupportedAlgorithm_Reasons)_get_backend)BackendHMACBackend)hashesc                   @   s   e Zd Z		ddedejdeje fddZ	e
dejfdd	Zd
eddfddZdddZdefddZdeddfddZdS )HMACNkey	algorithmbackendc                 C   sl   t |}t|tstdtjt|tjstd|| _	|| _
|| _|d u r1| j
|| j| _d S || _d S )Nz.Backend object does not implement HMACBackend.z*Expected instance of hashes.HashAlgorithm.)r   
isinstancer   r   r   ZBACKEND_MISSING_INTERFACEr	   HashAlgorithm	TypeError
_algorithm_backend_keyZcreate_hmac_ctxr   _ctx)selfr   r   r   ctx r   b/var/www/secure340b-portal/env/lib/python3.10/site-packages/cryptography/hazmat/primitives/hmac.py__init__   s   

zHMAC.__init__returnc                 C   s   | j S )N)r   r   r   r   r   r   -   s   zHMAC.algorithmdatac                 C   s.   | j d u r	tdtd| | j | d S )NContext was already finalized.r   )r   r   r   Z_check_byteslikeupdate)r   r   r   r   r   r   1   s   
zHMAC.updatec                 C   s.   | j d u r	tdt| j| j| j| j  dS )Nr   )r   r   )r   r   r
   r   r   r   copyr   r   r   r   r   7   s   
z	HMAC.copyc                 C   s&   | j d u r	td| j  }d | _ |S )Nr   )r   r   finalize)r   digestr   r   r   r    A   s
   

zHMAC.finalize	signaturec                 C   s:   t d| | jd u rtd| jd }| _|| d S )Nr"   r   )r   _check_bytesr   r   verify)r   r"   r   r   r   r   r$   H   s
   
zHMAC.verify)NN)r   r
   )__name__
__module____qualname__bytesr	   r   typingOptionalr   r   propertyr   r   r   r    r$   r   r   r   r   r
      s     


r
   )r)   Zcryptographyr   Zcryptography.exceptionsr   r   r   Zcryptography.hazmat.backendsr   Z'cryptography.hazmat.backends.interfacesr   r   Zcryptography.hazmat.primitivesr	   ZHashContextr
   r   r   r   r   <module>   s   