U
    m5{i¸  ã                   @  s¢   d dl mZ 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 d dlmZ ejeeef Zdd	d	d
dd	dœdd„ZG dd„ dƒZdS )é    )ÚannotationsN)ÚquoteÚ	urlencode)Úconstant_timeÚhmac)ÚSHA1ÚSHA256ÚSHA512)ÚInvalidToken)ÚBufferÚHOTPÚstrú
str | Nonezlist[tuple[str, int]])ÚhotpÚ	type_nameÚaccount_nameÚissuerÚextra_parametersÚreturnc                 C  s„   d| j fdt | j¡fd| jj ¡ fg}|d k	r>| d|f¡ | |¡ |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&   úQ/tmp/pip-unpacked-wheel-6hw_jadn/cryptography/hazmat/primitives/twofactor/hotp.pyÚ_generate_uri   s    ý
ÿýr(   c                   @  sl   e Zd Zdddddddd	œd
d„Zdddœdd„Zddddœdd„Zdddœdd„Zdddddœdd„ZdS )r   NTr   ÚintÚHOTPHashTypesz
typing.AnyÚboolÚNone)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
isinstancer)   Ú	TypeErrorr   r   r	   r   r   r   )Úselfr-   r.   r   r/   r0   r&   r&   r'   Ú__init__.   s    
zHOTP.__init__Úbytes)Úcounterr   c                 C  s<   t |tƒstdƒ‚|  |¡}|d| j  }d || j¡ ¡ S )Nz*Counter parameter must be an integer type.é
   z{0:0{1}})r6   r)   r7   Ú_dynamic_truncater   ÚformatÚencode)r8   r;   Ztruncated_valuer   r&   r&   r'   ÚgenerateF   s
    

zHOTP.generate)r   r;   r   c                 C  s   t  |  |¡|¡stdƒ‚d S )Nz#Supplied HOTP value does not match.)r   Zbytes_eqr@   r
   )r8   r   r;   r&   r&   r'   ÚverifyN   s    zHOTP.verifyc                 C  sŒ   t  | j| j¡}z| |jddd�¡ W n$ tk
rL   tdd› d�ƒ‚Y nX | ¡ }|t	|ƒd  d@ }|||d	 … }t
j|dd
�d@ S )Nr3   Úbig)r.   Ú	byteorderzCounter must be between 0 and l   ÿÿÿÿ Ú.é   é   é   )rC   iÿÿÿ)r   ÚHMACr   r   ÚupdateÚto_bytesÚOverflowErrorr5   Úfinalizer4   r)   Ú
from_bytes)r8   r;   ÚctxZ
hmac_valueÚoffsetÚpr&   r&   r'   r=   R   s    zHOTP._dynamic_truncater   r   )r   r;   r   r   c                 C  s   t | d||dt|ƒfgƒS )Nr   r;   )r(   r)   )r8   r   r;   r   r&   r&   r'   Úget_provisioning_uri`   s        ÿzHOTP.get_provisioning_uri)NT)Ú__name__Ú
__module__Ú__qualname__r9   r@   rA   r=   rQ   r&   r&   r&   r'   r   -   s     ú)Ú
__future__r   r   ÚtypingÚurllib.parser   r   Zcryptography.hazmat.primitivesr   r   Z%cryptography.hazmat.primitives.hashesr   r   r	   Z(cryptography.hazmat.primitives.twofactorr
   Zcryptography.utilsr   ÚUnionr*   r(   r   r&   r&   r&   r'   Ú<module>   s   