3
ãde¡  ã               @   s    d dl Z d dlZd dlmZmZ d dlmZmZ d dlm	Z	m
Z
mZ d dlmZ eje	e
ef Zdeeeje ejejeef  edœdd	„ZG d
d„ dƒZdS )é    N)ÚquoteÚ	urlencode)Úconstant_timeÚhmac)ÚSHA1ÚSHA256ÚSHA512)ÚInvalidTokenÚHOTP)ÚhotpÚ	type_nameÚaccount_nameÚissuerÚextra_parametersÚreturnc             C   s„   d| j fdtj| jƒfd| jjjƒ fg}|d k	r>|jd|fƒ |j|ƒ |rbt	|ƒ› dt	|ƒ› �nt	|ƒ}d|› d|› dt
|ƒ› �S )	NÚdigitsÚsecretÚ	algorithmr   ú:z
otpauth://ú/ú?)Ú_lengthÚbase64Ú	b32encodeÚ_keyÚ
_algorithmÚnameÚupperÚappendÚextendr   r   )r   r   r   r   r   Ú
parametersÚlabel© r"   úd/var/www/agendate/envp3/lib/python3.6/site-packages/cryptography/hazmat/primitives/twofactor/hotp.pyÚ_generate_uri   s    
r$   c               @   st   e Zd Zdeeeejeddœdd„Z	eedœdd„Z
eedd	œd
d„Zeedœdd„Zeeeje edœdd„ZdS )r
   NT)ÚkeyÚlengthr   ÚbackendÚenforce_key_lengthr   c             C   st   t |ƒdk r|dkrtdƒ‚t|tƒs.tdƒ‚|dk s>|dkrFtdƒ‚t|tttfƒs^tdƒ‚|| _|| _	|| _
d S )	Né   Tz'Key length has to be at least 128 bits.z)Length parameter must be an integer type.é   é   z)Length of HOTP has to be between 6 and 8.z)Algorithm must be SHA1, SHA256 or SHA512.)ÚlenÚ
ValueErrorÚ
isinstanceÚintÚ	TypeErrorr   r   r   r   r   r   )Úselfr%   r&   r   r'   r(   r"   r"   r#   Ú__init__,   s    
zHOTP.__init__)Úcounterr   c             C   s*   | j |ƒ}|d| j  }dj|| jƒjƒ S )Né
   z{0:0{1}})Ú_dynamic_truncater   ÚformatÚencode)r1   r3   Ztruncated_valuer   r"   r"   r#   ÚgenerateD   s    
zHOTP.generate)r   r3   r   c             C   s   t j| j|ƒ|ƒstdƒ‚d S )Nz#Supplied HOTP value does not match.)r   Zbytes_eqr8   r	   )r1   r   r3   r"   r"   r#   ÚverifyI   s    zHOTP.verifyc             C   sb   t j| j| jƒ}|j|jddd�ƒ |jƒ }|t|ƒd  d@ }|||d … }tj	|dd�d@ S )	Nr+   Úbig)r&   Ú	byteorderé   é   é   )r;   iÿÿÿ)
r   ÚHMACr   r   ÚupdateÚto_bytesÚfinalizer,   r/   Ú
from_bytes)r1   r3   ÚctxZ
hmac_valueÚoffsetÚpr"   r"   r#   r5   M   s    zHOTP._dynamic_truncate)r   r3   r   r   c             C   s   t | d||dt|ƒfgƒS )Nr   r3   )r$   r/   )r1   r   r3   r   r"   r"   r#   Úget_provisioning_uriV   s    zHOTP.get_provisioning_uri)NT)Ú__name__Ú
__module__Ú__qualname__Úbytesr/   ÚHOTPHashTypesÚtypingÚAnyÚboolr2   r8   r9   r5   ÚstrÚOptionalrG   r"   r"   r"   r#   r
   +   s    
)r   rM   Úurllib.parser   r   Zcryptography.hazmat.primitivesr   r   Z%cryptography.hazmat.primitives.hashesr   r   r   Z(cryptography.hazmat.primitives.twofactorr	   ÚUnionrL   rP   rQ   ÚListÚTupler/   r$   r
   r"   r"   r"   r#   Ú<module>   s   