o
    5Wc                  
   @   sj  d dl Z d dlZd dlmZ d dlmZ d dlmZmZ G dd de j	dZ
ded	dfd
dZdeje deded	ejeef fddZdeje dedejegef d	efddZdeje deded	ejeef fddZdeje dedejegef d	efddZG dd dZG dd de
ZG dd de
ZG dd dZG d d! d!e
ZG d"d# d#e
ZdS )$    N)utils)AlreadyFinalized)check_ansix923_paddingcheck_pkcs7_paddingc                   @   s8   e Zd ZejdedefddZejdefddZdS )PaddingContextdatareturnc                 C      dS )zR
        Pads the provided bytes and returns any available data as bytes.
        N )selfr   r
   r
   HD:\Flask\env\Lib\site-packages\cryptography/hazmat/primitives/padding.pyupdate       zPaddingContext.updatec                 C   r	   )z6
        Finalize the padding, returns bytes.
        Nr
   r   r
   r
   r   finalize   r   zPaddingContext.finalizeN)__name__
__module____qualname__abcabstractmethodbytesr   r   r
   r
   r
   r   r      s
    r   )	metaclass
block_sizer   c                 C   s<   d|   krdkst d t d| d dkrt dd S )Nr   i  z%block_size must be in range(0, 2041).   z#block_size must be a multiple of 8.)
ValueError)r   r
   r
   r   _byte_padding_check   s   r   buffer_r   c                 C   sh   | d u rt dtd| | t|7 } t| |d  }| d ||d   }| ||d  d  } | |fS )NContext was already finalized.r   r   )r   r   _check_bytesliker   lenr   r   r   Zfinished_blocksresultr
   r
   r   _byte_padding_update'   s   r"   	paddingfnc                 C   s,   | d u rt d|d t|  }| || S )Nr   r   )r   r   )r   r   r#   pad_sizer
   r
   r   _byte_padding_pad9   s   r%   c                 C   sr   | d u rt dtd| | t|7 } tt| |d  d d}| d ||d   }| ||d  d  } | |fS )Nr   r   r      r   )r   r   r   r   maxr   r    r
   r
   r   _byte_unpadding_updateE   s   r(   checkfnc                 C   sR   | d u rt dt| |d krtd|| }|std| d }| d |  S )Nr   r   zInvalid padding bytes.)r   r   r   )r   r   r)   Zvalidr$   r
   r
   r   _byte_unpadding_checkW   s   r+   c                   @   6   e Zd ZdefddZdefddZdefddZd	S )
PKCS7r   c                 C      t | || _d S Nr   r   r   r   r
   r
   r   __init__l      
zPKCS7.__init__r   c                 C   
   t | jS r/   )_PKCS7PaddingContextr   r   r
   r
   r   padderp      
zPKCS7.padderc                 C   r4   r/   )_PKCS7UnpaddingContextr   r   r
   r
   r   unpadders   r7   zPKCS7.unpadderNr   r   r   intr2   r   r6   r9   r
   r
   r
   r   r-   k       r-   c                   @   \   e Zd ZU eje ed< defddZdedefddZ	d	edefd
dZ
defddZdS )r5   _bufferr   c                 C      || _ d| _d S N    r   r>   r1   r
   r
   r   r2   z      
z_PKCS7PaddingContext.__init__r   r   c                 C      t | j|| j\| _}|S r/   r"   r>   r   r   r   r!   r
   r
   r   r         

z_PKCS7PaddingContext.updatesizec                 C   s   t |g| S r/   r   r   rH   r
   r
   r   _padding   s   z_PKCS7PaddingContext._paddingc                 C      t | j| j| j}d | _|S r/   r%   r>   r   rK   r   r!   r
   r
   r   r      
   z_PKCS7PaddingContext.finalizeNr   r   r   typingOptionalr   __annotations__r;   r2   r   rK   r   r
   r
   r
   r   r5   w      
 r5   c                   @   J   e Zd ZU eje ed< defddZdedefddZ	defd	d
Z
dS )r8   r>   r   c                 C   r?   r@   rB   r1   r
   r
   r   r2      rC   z_PKCS7UnpaddingContext.__init__r   r   c                 C   rD   r/   r(   r>   r   rF   r
   r
   r   r      rG   z_PKCS7UnpaddingContext.updatec                 C      t | j| jt}d | _|S r/   )r+   r>   r   r   rN   r
   r
   r   r      s
   
z_PKCS7UnpaddingContext.finalizeNr   r   r   rQ   rR   r   rS   r;   r2   r   r   r
   r
   r
   r   r8      
   
 r8   c                   @   r,   )
ANSIX923r   c                 C   r.   r/   r0   r1   r
   r
   r   r2      r3   zANSIX923.__init__r   c                 C   r4   r/   )_ANSIX923PaddingContextr   r   r
   r
   r   r6      r7   zANSIX923.padderc                 C   r4   r/   )_ANSIX923UnpaddingContextr   r   r
   r
   r   r9      r7   zANSIX923.unpadderNr:   r
   r
   r
   r   rZ      r<   rZ   c                   @   r=   )r[   r>   r   c                 C   r?   r@   rB   r1   r
   r
   r   r2      rC   z _ANSIX923PaddingContext.__init__r   r   c                 C   rD   r/   rE   rF   r
   r
   r   r      rG   z_ANSIX923PaddingContext.updaterH   c                 C   s   t dg|d  t |g S )Nr   r&   rI   rJ   r
   r
   r   rK      s   z _ANSIX923PaddingContext._paddingc                 C   rL   r/   rM   rN   r
   r
   r   r      rO   z _ANSIX923PaddingContext.finalizeNrP   r
   r
   r
   r   r[      rT   r[   c                   @   rU   )r\   r>   r   c                 C   r?   r@   rB   r1   r
   r
   r   r2      rC   z"_ANSIX923UnpaddingContext.__init__r   r   c                 C   rD   r/   rV   rF   r
   r
   r   r      rG   z _ANSIX923UnpaddingContext.updatec                 C   rW   r/   )r+   r>   r   r   rN   r
   r
   r   r      s   z"_ANSIX923UnpaddingContext.finalizeNrX   r
   r
   r
   r   r\      rY   r\   )r   rQ   Zcryptographyr   Zcryptography.exceptionsr   Z"cryptography.hazmat.bindings._rustr   r   ABCMetar   r;   r   rR   r   Tupler"   Callabler%   r(   r+   r-   r5   r8   rZ   r[   r\   r
   r
   r
   r   <module>   sb   



