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 d dlmZ d dlmZ d dlmZ d dlmZ G d	d
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eZdS )    )absolute_importdivisionprint_function)UnsupportedAlgorithm_Reasons)_get_backend)HMACBackend)constant_time)InvalidToken)HOTP)_generate_uric               @   s.   e Zd ZdddZdd Zdd Zd	d
 ZdS )TOTPNTc             C   s:   t |}t|tstdtj|| _t|||||| _d S )Nz.Backend object does not implement HMACBackend.)	r   
isinstancer   r   r   ZBACKEND_MISSING_INTERFACE
_time_stepr   _hotp)selfkeyZlength	algorithmZ	time_stepZbackendZenforce_key_length r   /usr/lib64/python3.6/totp.py__init__   s    	
zTOTP.__init__c             C   s   t || j }| jj|S )N)intr   r   generate)r   timeZcounterr   r   r   r   $   s    zTOTP.generatec             C   s   t j| j||stdd S )Nz#Supplied TOTP value does not match.)r	   Zbytes_eqr   r
   )r   totpr   r   r   r   verify(   s    zTOTP.verifyc             C   s   t | jd||dt| jfgS )Nr   Zperiod)r   r   r   r   )r   Zaccount_nameZissuerr   r   r   get_provisioning_uri,   s    zTOTP.get_provisioning_uri)NT)__name__
__module____qualname__r   r   r   r   r   r   r   r   r      s
    
r   N)Z
__future__r   r   r   Zcryptography.exceptionsr   r   Zcryptography.hazmat.backendsr   Z'cryptography.hazmat.backends.interfacesr   Zcryptography.hazmat.primitivesr	   Z(cryptography.hazmat.primitives.twofactorr
   Z-cryptography.hazmat.primitives.twofactor.hotpr   Z.cryptography.hazmat.primitives.twofactor.utilsr   objectr   r   r   r   r   <module>   s   