o
    b                     @   s2   d dl mZmZ d dlmZ G dd dejZdS )    )UnsupportedAlgorithm_Reasons)hashesc                   @   sj   e Zd ZddejfddZedejfddZddd	Zd
e	ddfddZ
de	fddZde	fddZdS )_HashContextN	algorithmc                 C   s   || _ || _|d u rF| jj }| jj|| jjj}| j|}|| jjjkr2t	d
|jtj| jj||| jjj}| j|dk || _d S )Nz+{} is not a supported hash on this backend.r   )
_algorithm_backend_libEVP_MD_CTX_new_ffigcEVP_MD_CTX_freeZ_evp_md_from_algorithmZNULLr   formatnamer   ZUNSUPPORTED_HASHZEVP_DigestInit_exopenssl_assert_ctx)selfbackendr   ctxZevp_mdres r   j/var/www/secure340b-portal/env/lib/python3.10/site-packages/cryptography/hazmat/backends/openssl/hashes.py__init__   s(   

z_HashContext.__init__returnc                 C   s   | j S N)r   )r   r   r   r   r   $   s   z_HashContext.algorithmc                 C   sV   | j j }| j j|| j jj}| j j|| j}| j |dk t	| j | j
|dS )Nr   )r   )r   r	   r
   r   r   r   ZEVP_MD_CTX_copy_exr   r   r   r   )r   Z
copied_ctxr   r   r   r   copy(   s   
z_HashContext.copydatac                 C   s:   | j j|}| j j| j|t|}| j |dk d S )Nr   )r   r   from_bufferr	   ZEVP_DigestUpdater   lenr   )r   r   Zdata_ptrr   r   r   r   update1   s
   z_HashContext.updatec                 C   s   t | jtjr|  S | jjd| jjj	}| jjd}| jj
| j||}| j|dk | j|d | jjk | jj|d |d  S )Nunsigned char[]zunsigned int *r   )
isinstancer   r   ZExtendableOutputFunction_finalize_xofr   r   newr	   ZEVP_MAX_MD_SIZEZEVP_DigestFinal_exr   r   digest_sizebuffer)r   bufZoutlenr   r   r   r   finalize8   s   
z_HashContext.finalizec                 C   sV   | j jd| jj}| j j| j|| jj}| j |dk | j j	|d | jj S )Nr    r   )
r   r   r#   r   r$   r	   ZEVP_DigestFinalXOFr   r   r%   )r   r&   r   r   r   r   r"   H   s   z_HashContext._finalize_xofr   )r   r   )__name__
__module____qualname__r   ZHashAlgorithmr   propertyr   r   bytesr   r'   r"   r   r   r   r   r   
   s    
	r   N)Zcryptography.exceptionsr   r   Zcryptography.hazmat.primitivesr   ZHashContextr   r   r   r   r   <module>   s   