U
    ÒZj©  ã                   @   sL   d dl Z d dlmZmZ d dlmZ e jr6d dlmZ G dd„ dej	ƒZ
dS )é    N)ÚUnsupportedAlgorithmÚ_Reasons)Úhashes)ÚBackendc                   @   sp   e Zd Zddejddœdd„Zeejdœdd„ƒZd dœd	d
„Ze	ddœdd„Z
e	dœdd„Ze	dœdd„ZdS )Ú_HashContextNr   )ÚbackendÚ	algorithmÚreturnc                 C   s–   || _ || _|d krŒ| jj ¡ }| jj || jjj¡}| j |¡}|| jjjkrdt	d 
|j¡tjƒ‚| jj ||| jjj¡}| j |dk¡ || _d S )Nz+{} is not a supported hash on this backend.r   )Ú
_algorithmÚ_backendÚ_libÚEVP_MD_CTX_newÚ_ffiÚgcÚEVP_MD_CTX_freeZ_evp_md_from_algorithmZNULLr   ÚformatÚnamer   ZUNSUPPORTED_HASHZEVP_DigestInit_exÚopenssl_assertÚ_ctx)Úselfr   r   ÚctxZevp_mdÚres© r   ún/var/www/html/TRUCKING_PROJECT/venv/lib/python3.8/site-packages/cryptography/hazmat/backends/openssl/hashes.pyÚ__init__   s.     ÿÿü  ÿz_HashContext.__init__)r	   c                 C   s   | j S )N)r
   )r   r   r   r   r   +   s    z_HashContext.algorithmc                 C   sV   | j j ¡ }| j j || j jj¡}| j j || j¡}| j  |dk¡ t	| j | j
|d�S )Nr   )r   )r   r   r   r   r   r   ZEVP_MD_CTX_copy_exr   r   r   r   )r   Z
copied_ctxr   r   r   r   Úcopy/   s     ÿz_HashContext.copy)Údatar	   c                 C   s:   | j j |¡}| j j | j|t|ƒ¡}| j  |dk¡ d S )Nr   )r   r   Zfrom_bufferr   ZEVP_DigestUpdater   Úlenr   )r   r   Zdata_ptrr   r   r   r   Úupdate8   s      ÿz_HashContext.updatec                 C   s”   t | jtjƒr|  ¡ S | jj d| jjj	¡}| jj d¡}| jj 
| j||¡}| j |dk¡ | j |d | jjk¡ | jj |¡d |d … S d S )Núunsigned char[]zunsigned int *r   )Ú
isinstancer   r   ZExtendableOutputFunctionÚ_finalize_xofr   r   Únewr   ZEVP_MAX_MD_SIZEZEVP_DigestFinal_exr   r   Údigest_sizeÚbuffer)r   ÚbufZoutlenr   r   r   r   Úfinalize?   s     ÿÿz_HashContext.finalizec                 C   sV   | j j d| jj¡}| j j | j|| jj¡}| j  |dk¡ | j j 	|¡d | jj… S )Nr   r   )
r   r   r"   r   r#   r   ZEVP_DigestFinalXOFr   r   r$   )r   r%   r   r   r   r   r!   O   s     ÿ  ÿz_HashContext._finalize_xof)N)Ú__name__Ú
__module__Ú__qualname__r   ZHashAlgorithmr   Úpropertyr   r   Úbytesr   r&   r!   r   r   r   r   r      s    ÿ þ	r   )ÚtypingZcryptography.exceptionsr   r   Zcryptography.hazmat.primitivesr   ÚTYPE_CHECKINGZ,cryptography.hazmat.backends.openssl.backendr   ZHashContextr   r   r   r   r   Ú<module>   s
   