U
    *”}fÊ  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 ej¡G dd„ deƒƒZe e¡G dd	„ d	eƒƒZe e¡G d
d„ deƒƒZe e¡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	   úU/tmp/pip-unpacked-wheel-x36vw73o/cryptography/hazmat/primitives/asymmetric/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   sH   || _ t|tjƒs$|| jk	r$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sixÚinteger_typesÚ
MAX_LENGTHÚ	TypeErrorÚ
ValueErrorZ_salt_length)r
   ÚmgfÚsalt_lengthr	   r	   r   Ú__init__#   s    
ÿþ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	algorithmÚ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 r    )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   sF   t | tjtjfƒstdƒ‚| jd d }||j d }|dksBt‚|S )Nz(key must be an RSA public or private keyé   é   é   r   )r   r   ZRSAPrivateKeyZRSAPublicKeyr   Zkey_sizeÚdigest_sizeÚAssertionError)ÚkeyZhash_algorithmZemlenr   r	   r	   r   Úcalculate_max_pss_salt_lengthI   s    r,   )Ú
__future__r   r   r   r   r   Zcryptographyr   Zcryptography.hazmat.primitivesr   Z)cryptography.hazmat.primitives.asymmetricr   Úadd_metaclassÚABCMetar   r   Zregister_interfacer   r   r   r%   r,   r	   r	   r	   r   Ú<module>   s   

