o
    bi                     @  s   d dl mZ d dlZd dlmZ d dl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dZd!ddZd"ddZG dd deZG dd deZdS )#    )annotationsN)Callable)utils)AlreadyFinalized
InvalidKey)constant_timehasheshmac)KeyDerivationFunctionnintreturnbytesc                 C  s   | j dddS )N   big)length	byteorder)to_bytes)r    r   f/home/kim/smarthome/.venv/lib/python3.10/site-packages/cryptography/hazmat/primitives/kdf/concatkdf.py_int_to_u32be   s   r   	algorithmhashes.HashAlgorithmr   	otherinfobytes | NoneNonec                 C  s>   | j d }||krtd| d|d urtd| d S d S )Nl    zCannot derive keys larger than z bits.r   )digest_size
ValueErrorr   _check_bytes)r   r   r   
max_lengthr   r   r   _common_args_checks   s   
r    key_materialutils.Bufferauxfn Callable[[], hashes.HashContext]c                 C  s   t d|  dg}d}d}||kr<| }|t| ||  || ||  |t|d 7 }|d7 }||ksd|d | S )Nr!       r      )r   Z_check_byteslikeupdater   appendfinalizelenjoin)r!   r   r#   r   outputZoutlencounterhr   r   r   _concatkdf_derive    s   

	r0   c                   @  s8   e Zd Z	ddd
dZdddZdddZdddZdS )ConcatKDFHashNr   r   r   r   r   r   backend
typing.Anyc                 C  s4   t ||| || _|| _|d ur|nd| _d| _d S )Nr%   F)r    
_algorithm_length
_otherinfo_used)selfr   r   r   r2   r   r   r   __init__8   s
   
zConcatKDFHash.__init__r   hashes.Hashc                 C  s   t | jS N)r   ZHashr4   r8   r   r   r   _hashF   s   zConcatKDFHash._hashr!   r"   r   c                 C  $   | j rtd| _ t|| j| j| jS NT)r7   r   r0   r5   r=   r6   r8   r!   r   r   r   deriveI      zConcatKDFHash.deriveexpected_keyr   c                 C     t | ||std S r;   r   Zbytes_eqrA   r   r8   r!   rC   r   r   r   verifyQ      zConcatKDFHash.verifyr;   )r   r   r   r   r   r   r2   r3   )r   r:   r!   r"   r   r   r!   r   rC   r   r   r   )__name__
__module____qualname__r9   r=   rA   rG   r   r   r   r   r1   7   s    

r1   c                   @  s8   e Zd Z	ddddZdddZdddZdddZdS )ConcatKDFHMACNr   r   r   r   saltr   r   r2   r3   c                 C  st   t ||| || _|| _|d ur|nd| _|jd u r"t|j d|d u r,d|j }ntd| || _	d| _
d S )Nr%   z is unsupported for ConcatKDF    rO   F)r    r4   r5   r6   
block_size	TypeErrornamer   r   _saltr7   )r8   r   r   rO   r   r2   r   r   r   r9   W   s   

zConcatKDFHMAC.__init__r   	hmac.HMACc                 C  s   t | j| jS r;   )r	   HMACrT   r4   r<   r   r   r   _hmacp   s   zConcatKDFHMAC._hmacr!   r"   r   c                 C  r>   r?   )r7   r   r0   r5   rW   r6   r@   r   r   r   rA   s   rB   zConcatKDFHMAC.deriverC   r   c                 C  rD   r;   rE   rF   r   r   r   rG   {   rH   zConcatKDFHMAC.verifyr;   )
r   r   r   r   rO   r   r   r   r2   r3   )r   rU   rI   rJ   )rK   rL   rM   r9   rW   rA   rG   r   r   r   r   rN   V   s    

rN   )r   r   r   r   )r   r   r   r   r   r   r   r   )
r!   r"   r   r   r#   r$   r   r   r   r   )
__future__r   typingcollections.abcr   Zcryptographyr   Zcryptography.exceptionsr   r   Zcryptography.hazmat.primitivesr   r   r	   Z"cryptography.hazmat.primitives.kdfr
   r   r    r0   r1   rN   r   r   r   r   <module>   s   


