U
    /j                     @  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ddZG dd dZdS )    )annotationsN)quote	urlencode)constant_timehmac)SHA1SHA256SHA512)InvalidToken)BufferHOTPstr
str | Nonezlist[tuple[str, int]])hotp	type_nameaccount_nameissuerextra_parametersreturnc                 C  s   d| j fdt| jfd| jj fg}|d k	r>|d|f || |rbt	| dt	| nt	|}d| d| dt
| S )	Ndigitssecret	algorithmr   :z
otpauth:///?)_lengthbase64	b32encode_key
_algorithmnameupperappendextendr   r   )r   r   r   r   r   
parameterslabel r&   Q/tmp/pip-unpacked-wheel-qzbw3lpx/cryptography/hazmat/primitives/twofactor/hotp.py_generate_uri   s    
r(   c                   @  sl   e Zd Zdddddddd	d
dZdddddZddddddZdddddZdddddddZdS )r   NTr   intHOTPHashTypesz
typing.AnyboolNone)keylengthr   backendenforce_key_lengthr   c                 C  st   t |dk r|dkrtdt|ts.td|dk s>|dkrFtdt|tttfs^td|| _|| _	|| _
d S )	N   Tz'Key length has to be at least 128 bits.z)Length parameter must be an integer type.      z)Length of HOTP has to be between 6 and 8.z)Algorithm must be SHA1, SHA256 or SHA512.)len
ValueError
isinstancer)   	TypeErrorr   r   r	   r   r   r   )selfr-   r.   r   r/   r0   r&   r&   r'   __init__.   s    
zHOTP.__init__bytes)counterr   c                 C  s<   t |tstd| |}|d| j  }d|| j S )Nz*Counter parameter must be an integer type.
   z{0:0{1}})r6   r)   r7   _dynamic_truncater   formatencode)r8   r;   Ztruncated_valuer   r&   r&   r'   generateF   s
    

zHOTP.generate)r   r;   r   c                 C  s   t | ||stdd S )Nz#Supplied HOTP value does not match.)r   Zbytes_eqr@   r
   )r8   r   r;   r&   r&   r'   verifyN   s    zHOTP.verifyc                 C  s   t | j| j}z||jddd W n$ tk
rL   tdd dY nX | }|t	|d  d@ }|||d	  }t
j|dd
d@ S )Nr3   big)r.   	byteorderzCounter must be between 0 and l    .         )rC   i)r   HMACr   r   updateto_bytesOverflowErrorr5   finalizer4   r)   
from_bytes)r8   r;   ctxZ
hmac_valueoffsetpr&   r&   r'   r=   R   s    zHOTP._dynamic_truncater   r   )r   r;   r   r   c                 C  s   t | d||dt|fgS )Nr   r;   )r(   r)   )r8   r   r;   r   r&   r&   r'   get_provisioning_uri`   s        zHOTP.get_provisioning_uri)NT)__name__
__module____qualname__r9   r@   rA   r=   rQ   r&   r&   r&   r'   r   -   s     )
__future__r   r   typingurllib.parser   r   Zcryptography.hazmat.primitivesr   r   Z%cryptography.hazmat.primitives.hashesr   r   r	   Z(cryptography.hazmat.primitives.twofactorr
   Zcryptography.utilsr   Unionr*   r(   r   r&   r&   r&   r'   <module>   s   