U
    çe¨]Õ  ã                   @   sÖ   d dl mZmZmZ d dl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	   úS/usr/lib/python3/dist-packages/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$salt_length must be zero or greater.)Ú_mgfÚ
isinstanceÚsixZinteger_typesÚ
MAX_LENGTHÚ	TypeErrorÚ
ValueErrorZ_salt_length)r
   ÚmgfÚsalt_lengthr	   r	   r   Ú__init__$   s    ÿ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   5   s
    zOAEP.__init__N)r   r   r   r   r   r	   r	   r	   r   r   1   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   A   s    zMGF1.__init__N)r   r   r   r   r   r   r	   r	   r	   r   r#   >   s   r#   c                 C   sP   t | tjtjfƒstdƒ‚tt | jd d ¡ƒ}||j	 d }|dksLt
‚|S )Nz(key must be an RSA public or private keyé   g       @é   r   )r   r   ZRSAPrivateKeyZRSAPublicKeyr   ÚintÚmathZceilZkey_sizeZdigest_sizeÚAssertionError)ÚkeyZhash_algorithmZemlenr   r	   r	   r   Úcalculate_max_pss_salt_lengthH   s    r*   )Z
__future__r   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    

