U
    *}fo                     @   s  d dl mZmZmZ d dlZd dl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d	 Zd
d Zdd Zdd Zdd ZG dd deZeeG dd deZeeG dd deZG dd deZeeG dd deZeeG dd deZdS )    )absolute_importdivisionprint_functionN)utils)AlreadyFinalized)libc                   @   s(   e Zd Zejdd Zejdd ZdS )PaddingContextc                 C   s   dS )zR
        Pads the provided bytes and returns any available data as bytes.
        N )selfdatar	   r	   J/tmp/pip-unpacked-wheel-x36vw73o/cryptography/hazmat/primitives/padding.pyupdate   s    zPaddingContext.updatec                 C   s   dS )z6
        Finalize the padding, returns bytes.
        Nr	   r
   r	   r	   r   finalize   s    zPaddingContext.finalizeN)__name__
__module____qualname__abcabstractmethodr   r   r	   r	   r	   r   r      s   
r   c                 C   s6   d|   krdksn t d| d dkr2t dd S )Nr   i  z%block_size must be in range(0, 2041).   z#block_size must be a multiple of 8.)
ValueError)
block_sizer	   r	   r   _byte_padding_check   s    r   c                 C   sh   | d k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_byteslikebyteslenbuffer_r   r   Zfinished_blocksresultr	   r	   r   _byte_padding_update'   s    r    c                 C   s,   | d krt d|d t|  }| || S )Nr   r   )r   r   )r   r   Z	paddingfnpad_sizer	   r	   r   _byte_padding_pad7   s    r"   c                 C   sr   | d k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_update?   s    r%   c                 C   s\   | d krt dt| |d kr(td|| |d }|sBtdt| d}| d |  S )Nr   r   zInvalid padding bytes.)r   r   r   six
indexbytes)r   r   ZcheckfnZvalidr!   r	   r	   r   _byte_unpadding_checkO   s    r)   c                   @   s$   e Zd Zdd Zdd Zdd ZdS )PKCS7c                 C   s   t | || _d S Nr   r   r
   r   r	   r	   r   __init__`   s    zPKCS7.__init__c                 C   s
   t | jS r+   )_PKCS7PaddingContextr   r   r	   r	   r   padderd   s    zPKCS7.padderc                 C   s
   t | jS r+   )_PKCS7UnpaddingContextr   r   r	   r	   r   unpadderg   s    zPKCS7.unpadderNr   r   r   r.   r0   r2   r	   r	   r	   r   r*   _   s   r*   c                   @   s,   e Zd Zdd Zdd Zdd Zdd Zd	S )
r/   c                 C   s   || _ d| _d S N    r   _bufferr-   r	   r	   r   r.   m   s    z_PKCS7PaddingContext.__init__c                 C   s   t | j|| j\| _}|S r+   r    r7   r   r
   r   r   r	   r	   r   r   r   s      
z_PKCS7PaddingContext.updatec                 C   s   t || S r+   r'   int2byter
   sizer	   r	   r   _paddingx   s    z_PKCS7PaddingContext._paddingc                 C   s   t | j| j| j}d | _|S r+   r"   r7   r   r>   r
   r   r	   r	   r   r   {   s      z_PKCS7PaddingContext.finalizeNr   r   r   r.   r   r>   r   r	   r	   r	   r   r/   k   s   r/   c                   @   s$   e Zd Zdd Zdd Zdd ZdS )r1   c                 C   s   || _ d| _d S r4   r6   r-   r	   r	   r   r.      s    z_PKCS7UnpaddingContext.__init__c                 C   s   t | j|| j\| _}|S r+   r%   r7   r   r9   r	   r	   r   r      s      
z_PKCS7UnpaddingContext.updatec                 C   s   t | j| jtj}d | _|S r+   )r)   r7   r   r   Z Cryptography_check_pkcs7_paddingr@   r	   r	   r   r      s      z_PKCS7UnpaddingContext.finalizeNr   r   r   r.   r   r   r	   r	   r	   r   r1      s   r1   c                   @   s$   e Zd Zdd Zdd Zdd ZdS )ANSIX923c                 C   s   t | || _d S r+   r,   r-   r	   r	   r   r.      s    zANSIX923.__init__c                 C   s
   t | jS r+   )_ANSIX923PaddingContextr   r   r	   r	   r   r0      s    zANSIX923.padderc                 C   s
   t | jS r+   )_ANSIX923UnpaddingContextr   r   r	   r	   r   r2      s    zANSIX923.unpadderNr3   r	   r	   r	   r   rD      s   rD   c                   @   s,   e Zd Zdd Zdd Zdd Zdd Zd	S )
rE   c                 C   s   || _ d| _d S r4   r6   r-   r	   r	   r   r.      s    z _ANSIX923PaddingContext.__init__c                 C   s   t | j|| j\| _}|S r+   r8   r9   r	   r	   r   r      s      
z_ANSIX923PaddingContext.updatec                 C   s   t d|d  t | S )Nr   r#   r:   r<   r	   r	   r   r>      s    z _ANSIX923PaddingContext._paddingc                 C   s   t | j| j| j}d | _|S r+   r?   r@   r	   r	   r   r      s      z _ANSIX923PaddingContext.finalizeNrA   r	   r	   r	   r   rE      s   rE   c                   @   s$   e Zd Zdd Zdd Zdd ZdS )rF   c                 C   s   || _ d| _d S r4   r6   r-   r	   r	   r   r.      s    z"_ANSIX923UnpaddingContext.__init__c                 C   s   t | j|| j\| _}|S r+   rB   r9   r	   r	   r   r      s      
z _ANSIX923UnpaddingContext.updatec                 C   s   t | j| jtj}d | _|S r+   )r)   r7   r   r   Z#Cryptography_check_ansix923_paddingr@   r	   r	   r   r      s    z"_ANSIX923UnpaddingContext.finalizeNrC   r	   r	   r	   r   rF      s   rF   )
__future__r   r   r   r   r'   Zcryptographyr   Zcryptography.exceptionsr   Z%cryptography.hazmat.bindings._paddingr   add_metaclassABCMetaobjectr   r   r    r"   r%   r)   r*   Zregister_interfacer/   r1   rD   rE   rF   r	   r	   r	   r   <module>   s,   
