File: //lib/python3/dist-packages/cryptography/hazmat/primitives/__pycache__/padding.cpython-38.pyc
U
�e�] � @ s d dl mZmZmZ d dlZd dlZd dlmZ d dlm Z d dl
m Z e� ej
�G dd� de��Zdd � Zd
d � Zd d
� Zdd� Zdd� ZG dd� de�Ze�e�G dd� de��Ze�e�G dd� de��ZG dd� de�Ze�e�G dd� de��Ze�e�G d d � d e��ZdS ) � )�absolute_import�division�print_functionN)�utils)�AlreadyFinalized)�libc @ s( e Zd Zejdd� �Zejdd� �ZdS )�PaddingContextc C s dS )zR
Pads the provided bytes and returns any available data as bytes.
N� )�self�datar r �H/usr/lib/python3/dist-packages/cryptography/hazmat/primitives/padding.py�update s zPaddingContext.updatec C s dS )z6
Finalize the padding, returns bytes.
Nr �r
r r r �finalize s zPaddingContext.finalizeN)�__name__�
__module__� __qualname__�abc�abstractmethodr
r r r r r r s
r c C s6 d| krdks n t d��| d dkr2t 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 sd | d krt d��t�d|� | |7 } t| �|d }| d ||d � }| ||d d � } | |fS )N� Context was already finalized.r r )r r � _check_bytes�len��buffer_r r Zfinished_blocks�resultr r r �_byte_padding_update' s r c C s, | d krt d��|d t| � }| ||� S )Nr r )r r )r r Z paddingfn�pad_sizer r r �_byte_padding_pad7 s r! c C sn | d krt d��t�d|� | |7 } tt| �|d d d�}| d ||d � }| ||d d � } | |fS )Nr r r � r )r r r �maxr r r r r �_byte_unpadding_update? s r$ c C s\ | d krt d��t| �|d kr(td��|| |d �}|sBtd��t�| d�}| d | � S )Nr r zInvalid padding bytes.���)r r r �sixZ
indexbytes)r r ZcheckfnZvalidr r r r �_byte_unpadding_checkO s r' c @ s$ e Zd Zdd� Zdd� Zdd� ZdS )�PKCS7c C s t |� || _d S �N�r r �r
r r r r �__init__` s zPKCS7.__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 zPKCS7.unpadderN�r r r r, r. r0 r r r r r( _ s r( c @ s, e Zd Zdd� Zdd� Zdd� Zdd� Zd 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 r5 r �r
r r r r r r
r s �
z_PKCS7PaddingContext.updatec C s t �|�| S r) �r& Zint2byte�r
�sizer r r �_paddingw s z _PKCS7PaddingContext._paddingc C s t | j| j| j�}d | _|S r) �r! r5 r r; �r
r r r r r z s �z _PKCS7PaddingContext.finalizeN�r r r r, r
r; r r r r r r- k s r- c @ s$ e Zd Zdd� Zdd� Zdd� ZdS )r/ c C s || _ d| _d S r2 r4 r+ r r r r, � s z _PKCS7UnpaddingContext.__init__c C s t | j|| j�\| _}|S r) �r$ r5 r r7 r r r r
� s �
z _PKCS7UnpaddingContext.updatec C s t | j| jtj�}d | _|S r) )r' r5 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 r/ � s r/ c @ s$ e Zd Zdd� Zdd� Zdd� ZdS )�ANSIX923c C s t |� || _d S r) r* r+ r r r r, � s zANSIX923.__init__c C s
t | j�S r) )�_ANSIX923PaddingContextr r r r r r. � s zANSIX923.padderc C s
t | j�S r) )�_ANSIX923UnpaddingContextr r r r r r0 � s zANSIX923.unpadderNr1 r r r r rA � s rA c @ s, e Zd Zdd� Zdd� Zdd� Zdd� Zd S )
rB c C s || _ d| _d S r2 r4 r+ r r r r, � s z _ANSIX923PaddingContext.__init__c C s t | j|| j�\| _}|S r) r6 r7 r r r r
� s �
z _ANSIX923PaddingContext.updatec C s t �d�|d t �|� S )Nr r" r8 r9 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.finalizeNr> r r r r rB � s rB c @ s$ e Zd Zdd� Zdd� Zdd� ZdS )rC c C s || _ d| _d S r2 r4 r+ r r r r, � s z"_ANSIX923UnpaddingContext.__init__c C s t | j|| j�\| _}|S r) r? r7 r r r r
� s �
z _ANSIX923UnpaddingContext.updatec C s t | j| jtj�}d | _|S r) )r' r5 r r Z#Cryptography_check_ansix923_paddingr= r r r r � s �z"_ANSIX923UnpaddingContext.finalizeNr@ r r r r rC � s rC ) Z
__future__r r r r r& Z cryptographyr Zcryptography.exceptionsr Z%cryptography.hazmat.bindings._paddingr Z
add_metaclass�ABCMeta�objectr r r r! r$ r' r( Zregister_interfacer- r/ rA rB rC r r r r �<module> s,