o
     `	                     @   sx   d dl mZmZm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 d dlmZ eejG dd deZd	S )
    )absolute_importdivisionprint_function)utils)AlreadyFinalizedUnsupportedAlgorithm_Reasons)_get_backend)HMACBackend)hashesc                   @   s@   e Zd ZdddZedZdd Zdd Zd	d
 Z	dd Z
dS )HMACNc                 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   ZHashAlgorithm	TypeError
_algorithm_backend_keyZcreate_hmac_ctx	algorithm_ctx)selfkeyr   backendctx r   yhome/ych/rk3568/buildroot/output/rockchip_rk3568/host/lib/python3.10/site-packages/cryptography/hazmat/primitives/hmac.py__init__   s   

zHMAC.__init__r   c                 C   s.   | j d u r	tdtd| | j | d S )NContext was already finalized.data)r   r   r   Z_check_byteslikeupdate)r   r   r   r   r   r   )   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   copy)r   r   r   r   r   /   s   
z	HMAC.copyc                 C   s&   | j d u r	td| j  }d | _ |S )Nr   )r   r   finalize)r   digestr   r   r   r   9   s
   

zHMAC.finalizec                 C   s:   t d| | jd u rtd| jd }| _|| d S )N	signaturer   )r   _check_bytesr   r   verify)r   r!   r   r   r   r   r#   @   s
   
zHMAC.verify)NN)__name__
__module____qualname__r   r   Zread_only_propertyr   r   r   r   r#   r   r   r   r   r      s    


r   N)
__future__r   r   r   cryptographyr   Zcryptography.exceptionsr   r   r   Zcryptography.hazmat.backendsr	   Z'cryptography.hazmat.backends.interfacesr
   Zcryptography.hazmat.primitivesr   Zregister_interfaceZHashContextobjectr   r   r   r   r   <module>   s   
