o
    
c                  
   @   s   d dl 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edefdd	Zd
ejdede je ddfddZdedede jg ejf dedef
ddZG dd deZG dd deZdS )    N)utils)AlreadyFinalized
InvalidKey)constant_timehasheshmac)KeyDerivationFunctionnreturnc                 C   s   | j dddS )N   big)length	byteorder)to_bytes)r	    r   Y/opt/certbot/lib/python3.10/site-packages/cryptography/hazmat/primitives/kdf/concatkdf.py_int_to_u32be   s   r   	algorithmr   	otherinfoc                 C   s<   | j d }||krtd||d urtd| d S d S )Nl    z'Cannot derive keys larger than {} bits.r   )digest_size
ValueErrorformatr   _check_bytes)r   r   r   
max_lengthr   r   r   _common_args_checks   s   
r   key_materialauxfnc                 C   s   t d|  dg}d}d}||kr<| }|t| ||  || ||  |t|d 7 }|d7 }||ksd|d | S )Nr       r      )r   _check_byteslikeupdater   appendfinalizelenjoin)r   r   r   r   outputoutlencounterhr   r   r   _concatkdf_derive    s   

	r*   c                	   @   sl   e Zd Z	ddejdedeje dej	fddZ
dejfd	d
ZdedefddZdededdfddZdS )ConcatKDFHashNr   r   r   backendc                 C   s4   t ||| || _|| _|d ur|nd| _d| _d S )Nr   F)r   
_algorithm_length
_otherinfo_used)selfr   r   r   r,   r   r   r   __init__8   s
   
zConcatKDFHash.__init__r
   c                 C   s   t | jS N)r   Hashr-   r1   r   r   r   _hashF   s   zConcatKDFHash._hashr   c                 C   $   | j rtd| _ t|| j| j| jS NT)r0   r   r*   r.   r6   r/   r1   r   r   r   r   deriveI      zConcatKDFHash.deriveexpected_keyc                 C      t | ||std S r3   r   bytes_eqr:   r   r1   r   r<   r   r   r   verifyQ      zConcatKDFHash.verifyr3   )__name__
__module____qualname__r   HashAlgorithminttypingOptionalbytesAnyr2   r4   r6   r:   rA   r   r   r   r   r+   7   s    
r+   c                   @   sv   e Zd Z	ddejdedeje deje dej	f
ddZ
d	ejfd
dZded	efddZdeded	dfddZdS )ConcatKDFHMACNr   r   saltr   r,   c                 C   st   t ||| || _|| _|d ur|nd| _|jd u r"td|j|d u r,d|j }nt	d| || _
d| _d S )Nr   z{} is unsupported for ConcatKDF    rM   F)r   r-   r.   r/   
block_size	TypeErrorr   namer   r   _saltr0   )r1   r   r   rM   r   r,   r   r   r   r2   W   s   


zConcatKDFHMAC.__init__r
   c                 C   s   t | j| jS r3   )r   HMACrR   r-   r5   r   r   r   _hmacr   s   zConcatKDFHMAC._hmacr   c                 C   r7   r8   )r0   r   r*   r.   rT   r/   r9   r   r   r   r:   u   r;   zConcatKDFHMAC.deriver<   c                 C   r=   r3   r>   r@   r   r   r   rA   }   rB   zConcatKDFHMAC.verifyr3   )rC   rD   rE   r   rF   rG   rH   rI   rJ   rK   r2   r   rS   rT   r:   rA   r   r   r   r   rL   V   s     
rL   )rH   cryptographyr   cryptography.exceptionsr   r   cryptography.hazmat.primitivesr   r   r   "cryptography.hazmat.primitives.kdfr   rG   rJ   r   rF   rI   r   CallableHashContextr*   r+   rL   r   r   r   r   <module>   s8   

