o
    )%a1                  
   @   sl  d dl Z d dlZd dlmZ d dlmZ d dl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e
ge
f d	efddZG dd deZG dd de	ZG dd de	ZG dd deZG d d! d!e	ZG d"d# d#e	ZdS )$    N)utils)AlreadyFinalized)libc                   @   s8   e Zd ZejdedefddZejdefddZdS )PaddingContextdatareturnc                 C      dS )zR
        Pads the provided bytes and returns any available data as bytes.
        N )selfr   r	   r	   H/usr/lib/python3/dist-packages/cryptography/hazmat/primitives/padding.pyupdate       zPaddingContext.updatec                 C   r   )z6
        Finalize the padding, returns bytes.
        Nr	   r
   r	   r	   r   finalize   r   zPaddingContext.finalizeN)__name__
__module____qualname__abcabstractmethodbytesr   r   r	   r	   r	   r   r      s
    r   )	metaclass
block_sizer   c                 C   s<   d|   krdkst d t d| d dkrt dd S )Nr   i  z%block_size must be in range(0, 2041).   z#block_size must be a multiple of 8.)
ValueError)r   r	   r	   r   _byte_padding_check   s   r   buffer_r   c                 C   sh   | d u rt dtd| | t|7 } t| |d  }| d ||d   }| ||d  d  } | |fS )NContext was already finalized.r   r   )r   r   _check_bytesliker   lenr   r   r   finished_blocksresultr	   r	   r   _byte_padding_update$   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_pad6   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_updateB   s   r(   checkfnc                 C   sX   | d u rt dt| |d krtd|| |d }|s!td| d }| d |  S )Nr   r   zInvalid padding bytes.)r   r   r   )r   r   r)   validr$   r	   r	   r   _byte_unpadding_checkT   s   r,   c                   @   s*   e Zd ZdefddZdd Zdd ZdS )	PKCS7r   c                 C      t | || _d S Nr   r   r
   r   r	   r	   r   __init__i      
zPKCS7.__init__c                 C   
   t | jS r/   )_PKCS7PaddingContextr   r   r	   r	   r   padderm      
zPKCS7.padderc                 C   r4   r/   )_PKCS7UnpaddingContextr   r   r	   r	   r   unpadderp   r7   zPKCS7.unpadderN)r   r   r   intr2   r6   r9   r	   r	   r	   r   r-   h   s    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   w      
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
   rF   r	   r	   r   _padding   s   z_PKCS7PaddingContext._paddingc                 C      t | j| j| j}d | _|S r/   r%   r<   r   rI   r
   r!   r	   r	   r   r      
   z_PKCS7PaddingContext.finalizeNr   r   r   typingOptionalr   __annotations__r:   r2   r   rI   r   r	   r	   r	   r   r5   t      
 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>   r@   r1   r	   r	   r   r2      rA   z_PKCS7UnpaddingContext.__init__r   r   c                 C   rB   r/   r(   r<   r   rD   r	   r	   r   r      rE   z_PKCS7UnpaddingContext.updatec                 C      t | j| jtj}d | _|S r/   )r,   r<   r   r    Cryptography_check_pkcs7_paddingrL   r	   r	   r   r      rM   z_PKCS7UnpaddingContext.finalizeNr   r   r   rO   rP   r   rQ   r:   r2   r   r   r	   r	   r	   r   r8      
   
 r8   c                   @   s6   e Zd ZdefddZdefddZdefddZd	S )
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.unpadderN)r   r   r   r:   r2   r   r6   r9   r	   r	   r	   r   rY      s    rY   c                   @   r;   )rZ   r<   r   c                 C   r=   r>   r@   r1   r	   r	   r   r2      rA   z _ANSIX923PaddingContext.__init__r   r   c                 C   rB   r/   rC   rD   r	   r	   r   r      rE   z_ANSIX923PaddingContext.updaterF   c                 C   s   t dg|d  t |g S )Nr   r&   rG   rH   r	   r	   r   rI      s   z _ANSIX923PaddingContext._paddingc                 C   rJ   r/   rK   rL   r	   r	   r   r      rM   z _ANSIX923PaddingContext.finalizeNrN   r	   r	   r	   r   rZ      rR   rZ   c                   @   rS   )r[   r<   r   c                 C   r=   r>   r@   r1   r	   r	   r   r2      rA   z"_ANSIX923UnpaddingContext.__init__r   r   c                 C   rB   r/   rT   rD   r	   r	   r   r      rE   z _ANSIX923UnpaddingContext.updatec                 C   rU   r/   )r,   r<   r   r   #Cryptography_check_ansix923_paddingrL   r	   r	   r   r      s   z"_ANSIX923UnpaddingContext.finalizeNrW   r	   r	   r	   r   r[      rX   r[   )r   rO   cryptographyr   cryptography.exceptionsr   %cryptography.hazmat.bindings._paddingr   ABCMetar   r:   r   rP   r   Tupler"   Callabler%   r(   r,   objectr-   r5   r8   rY   rZ   r[   r	   r	   r	   r   <module>   sb   



