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3
lá˜_Ê  ã               @   sÎ   d dl mZmZmZ d dlZd dlZd dlmZ d dlm	Z	 d dl
mZ ejejƒG dd„ deƒƒZejeƒG dd	„ d	eƒƒZejeƒG d
d„ deƒƒZejeƒG dd„ deƒƒZG dd„ deƒZdd„ ZdS )é    )Úabsolute_importÚdivisionÚprint_functionN)Úutils)Úhashes)Úrsac               @   s   e Zd Zejdd„ ƒZdS )ÚAsymmetricPaddingc             C   s   dS )zE
        A string naming this padding (e.g. "PSS", "PKCS1").
        N© )Úselfr	   r	   ú/usr/lib64/python3.6/padding.pyÚname   s    zAsymmetricPadding.nameN)Ú__name__Ú
__module__Ú__qualname__ÚabcÚabstractpropertyr   r	   r	   r	   r   r      s   r   c               @   s   e Zd ZdZdS )ÚPKCS1v15zEMSA-PKCS1-v1_5N)r   r   r   r   r	   r	   r	   r   r      s   r   c               @   s   e Zd Zeƒ ZdZdd„ ZdS )ÚPSSzEMSA-PSSc             C   sJ   || _ t|tjƒ r&|| jk	r&tdƒ‚|| jk	r@|dk r@tdƒ‚|| _d S )Nzsalt_length must be an integer.r   z$salt_length must be zero or greater.)Ú_mgfÚ
isinstanceÚsixZinteger_typesÚ
MAX_LENGTHÚ	TypeErrorÚ
ValueErrorZ_salt_length)r
   ÚmgfÚsalt_lengthr	   r	   r   Ú__init__#   s    
zPSS.__init__N)r   r   r   Úobjectr   r   r   r	   r	   r	   r   r      s   r   c               @   s   e Zd ZdZdd„ ZdS )ÚOAEPzEME-OAEPc             C   s*   t |tjƒstdƒ‚|| _|| _|| _d S )Nz*Expected instance of hashes.HashAlgorithm.)r   r   ÚHashAlgorithmr   r   Ú
_algorithmZ_label)r
   r   Ú	algorithmZlabelr	   r	   r   r   6   s
    zOAEP.__init__N)r   r   r   r   r   r	   r	   r	   r   r   2   s   r   c               @   s   e Zd Zeƒ Zdd„ ZdS )ÚMGF1c             C   s   t |tjƒstdƒ‚|| _d S )Nz*Expected instance of hashes.HashAlgorithm.)r   r   r   r   r    )r
   r!   r	   r	   r   r   B   s    zMGF1.__init__N)r   r   r   r   r   r   r	   r	   r	   r   r"   ?   s   r"   c             C   s:   t | tjtjfƒstdƒ‚| jd d }||j d }|S )Nz(key must be an RSA public or private keyé   é   é   )r   r   ZRSAPrivateKeyZRSAPublicKeyr   Zkey_sizeZdigest_size)ÚkeyZhash_algorithmZemlenr   r	   r	   r   Úcalculate_max_pss_salt_lengthI   s
    r'   )Z
__future__r   r   r   r   r   Zcryptographyr   Zcryptography.hazmat.primitivesr   Z)cryptography.hazmat.primitives.asymmetricr   Zadd_metaclassÚABCMetar   r   Zregister_interfacer   r   r   r"   r'   r	   r	   r	   r   Ú<module>   s   
