[EDIT] FILE: cmac.cpython-36.pyc
3 ꅭh� � @ s| d dl mZmZmZ d dlmZ d dlmZmZm Z d dl m Z d dl m Z d dlmZmZ ejej�G dd� de��Zd S ) � )�absolute_import�division�print_function)�utils)�AlreadyFinalized�UnsupportedAlgorithm�_Reasons)� _get_backend)� CMACBackend)�ciphers�macc @ s6 e Zd Zd dd�Zdd� Zdd� Zdd � Zd d � ZdS ) �CMACNc C sb t |�}t|t�s tdtj��t|tj�s2td��|| _ || _ |d krX| j j | j �| _ n|| _ d S )Nz.Backend object does not implement CMACBackend.z*Expected instance of BlockCipherAlgorithm.) r � isinstancer r r ZBACKEND_MISSING_INTERFACEr ZBlockCipherAlgorithm� TypeError� _algorithm�_backendZcreate_cmac_ctx�_ctx)�self� algorithm�backend�ctx� r � /usr/lib64/python3.6/cmac.py�__init__ s z CMAC.__init__c C s. | j d krtd��tjd|� | j j|� d S )Nz Context was already finalized.�data)r r r � _check_bytes�update)r r r r r r & s z CMAC.updatec C s& | j d krtd��| j j� }d | _ |S )Nz Context was already finalized.)r r �finalize)r Zdigestr r r r - s z CMAC.finalizec C s: t jd|� | jd kr td��| jd }| _|j|� d S )N� signaturez Context was already finalized.)r r r r �verify)r r r r r r r 4 s z CMAC.verifyc C s* | j d krtd��t| j| j| j j� d�S )Nz Context was already finalized.)r r )r r r r r �copy)r r r r r < s z CMAC.copy)NN)�__name__� __module__� __qualname__r r r r r r r r r r s r N)Z __future__r r r Z cryptographyr Zcryptography.exceptionsr r r Z cryptography.hazmat.backendsr Z'cryptography.hazmat.backends.interfacesr Z cryptography.hazmat.primitivesr r Zregister_interfaceZ MACContext�objectr r r r r �<module> s
SAVE
CANCEL