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    *”}fô  ã                   @   s€   d dl mZmZmZ d dlmZmZ d dlmZ d dl	m
Z
 d dlmZ d dlmZ d dlmZ d dlmZ G d	d
„ d
eƒZdS )é    )Úabsolute_importÚdivisionÚprint_function)ÚUnsupportedAlgorithmÚ_Reasons)Ú_get_backend)ÚHMACBackend)Úconstant_time)ÚInvalidToken)ÚHOTP)Ú_generate_uric                   @   s.   e Zd Zddd„Zdd„ Zdd„ Zd	d
„ ZdS )ÚTOTPNTc                 C   s:   t |ƒ}t|tƒstdtjƒ‚|| _t|||||ƒ| _d S )Nz.Backend object does not implement HMACBackend.)	r   Ú
isinstancer   r   r   ZBACKEND_MISSING_INTERFACEÚ
_time_stepr   Ú_hotp)ÚselfÚkeyÚlengthÚ	algorithmZ	time_stepÚbackendZenforce_key_length© r   úQ/tmp/pip-unpacked-wheel-x36vw73o/cryptography/hazmat/primitives/twofactor/totp.pyÚ__init__   s    	
þzTOTP.__init__c                 C   s   t || j ƒ}| j |¡S )N)Úintr   r   Úgenerate)r   ÚtimeÚcounterr   r   r   r   $   s    zTOTP.generatec                 C   s   t  |  |¡|¡stdƒ‚d S )Nz#Supplied TOTP value does not match.)r	   Zbytes_eqr   r
   )r   Útotpr   r   r   r   Úverify(   s    zTOTP.verifyc                 C   s   t | jd||dt| jƒfgƒS )Nr   Zperiod)r   r   r   r   )r   Zaccount_nameZissuerr   r   r   Úget_provisioning_uri,   s    ûzTOTP.get_provisioning_uri)NT)Ú__name__Ú
__module__Ú__qualname__r   r   r   r   r   r   r   r   r      s     ù
r   N)Ú
__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   Úobjectr   r   r   r   r   Ú<module>   s   