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3
lá˜_«  ã               @   s‚  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	m
Z
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jƒG d	d
„ d
eƒƒ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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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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"ejeƒejeƒG d%d&„ d&eƒƒƒZ#ejeƒejeƒG d'd(„ d(eƒƒƒZ$ejeƒG d)d*„ d*eƒƒZ%ejeƒG d+d,„ d,eƒƒZ&ejeƒG d-d.„ d.eƒƒZ'dS )/é    )Úabsolute_importÚdivisionÚprint_functionN)Úutils)ÚAlreadyFinalizedÚUnsupportedAlgorithmÚ_Reasons)Ú_get_backend)ÚHashBackendc               @   s(   e Zd Zejdd„ ƒZejdd„ ƒZdS )ÚHashAlgorithmc             C   s   dS )zH
        A string naming this algorithm (e.g. "sha256", "md5").
        N© )Úselfr   r   ú/usr/lib64/python3.6/hashes.pyÚname   s    zHashAlgorithm.namec             C   s   dS )z<
        The size of the resulting digest in bytes.
        Nr   )r   r   r   r   Údigest_size   s    zHashAlgorithm.digest_sizeN)Ú__name__Ú
__module__Ú__qualname__ÚabcÚabstractpropertyr   r   r   r   r   r   r      s   r   c               @   sD   e Zd Zejdd„ ƒZejdd„ ƒZejdd„ ƒZejdd„ ƒZ	d	S )
ÚHashContextc             C   s   dS )zD
        A HashAlgorithm that will be used by this context.
        Nr   )r   r   r   r   Ú	algorithm&   s    zHashContext.algorithmc             C   s   dS )z@
        Processes the provided bytes through the hash.
        Nr   )r   Údatar   r   r   Úupdate,   s    zHashContext.updatec             C   s   dS )zR
        Finalizes the hash context and returns the hash digest as bytes.
        Nr   )r   r   r   r   Úfinalize2   s    zHashContext.finalizec             C   s   dS )zM
        Return a HashContext that is a copy of the current context.
        Nr   )r   r   r   r   Úcopy8   s    zHashContext.copyN)
r   r   r   r   r   r   Úabstractmethodr   r   r   r   r   r   r   r   $   s   r   c               @   s   e Zd ZdZdS )ÚExtendableOutputFunctionz7
    An interface for extendable output functions.
    N)r   r   r   Ú__doc__r   r   r   r   r   ?   s   r   c               @   s8   e Zd Zddd„ZejdƒZdd„ Zdd„ Zd	d
„ Z	dS )ÚHashNc             C   s`   t |ƒ}t|tƒstdtjƒ‚t|tƒs0tdƒ‚|| _|| _	|d krV| j	j
| jƒ| _n|| _d S )Nz.Backend object does not implement HashBackend.z*Expected instance of hashes.HashAlgorithm.)r	   Ú
isinstancer
   r   r   ZBACKEND_MISSING_INTERFACEr   Ú	TypeErrorÚ
_algorithmÚ_backendZcreate_hash_ctxr   Ú_ctx)r   r   ÚbackendÚctxr   r   r   Ú__init__H   s    

zHash.__init__r"   c             C   s.   | j d krtdƒ‚tjd|ƒ | j j|ƒ d S )NzContext was already finalized.r   )r$   r   r   Z_check_bytesliker   )r   r   r   r   r   r   ]   s    
zHash.updatec             C   s*   | j d krtdƒ‚t| j| j| j jƒ dS )NzContext was already finalized.)r%   r&   )r$   r   r   r   r#   r   )r   r   r   r   r   c   s    
z	Hash.copyc             C   s&   | j d krtdƒ‚| j jƒ }d | _ |S )NzContext was already finalized.)r$   r   r   )r   Zdigestr   r   r   r   j   s
    

zHash.finalize)NN)
r   r   r   r'   r   Úread_only_propertyr   r   r   r   r   r   r   r   r   F   s
   

r   c               @   s   e Zd ZdZdZdZdS )ÚSHA1Zsha1é   é@   N)r   r   r   r   r   Ú
block_sizer   r   r   r   r)   r   s   r)   c               @   s   e Zd ZdZdZdZdS )Ú
SHA512_224z
sha512-224é   é€   N)r   r   r   r   r   r,   r   r   r   r   r-   y   s   r-   c               @   s   e Zd ZdZdZdZdS )Ú
SHA512_256z
sha512-256é    r/   N)r   r   r   r   r   r,   r   r   r   r   r0   €   s   r0   c               @   s   e Zd ZdZdZdZdS )ÚSHA224Zsha224r.   r+   N)r   r   r   r   r   r,   r   r   r   r   r2   ‡   s   r2   c               @   s   e Zd ZdZdZdZdS )ÚSHA256Zsha256r1   r+   N)r   r   r   r   r   r,   r   r   r   r   r3   Ž   s   r3   c               @   s   e Zd ZdZdZdZdS )ÚSHA384Zsha384é0   r/   N)r   r   r   r   r   r,   r   r   r   r   r4   •   s   r4   c               @   s   e Zd ZdZdZdZdS )ÚSHA512Zsha512r+   r/   N)r   r   r   r   r   r,   r   r   r   r   r6   œ   s   r6   c               @   s   e Zd ZdZdZdS )ÚSHA3_224zsha3-224r.   N)r   r   r   r   r   r   r   r   r   r7   £   s   r7   c               @   s   e Zd ZdZdZdS )ÚSHA3_256zsha3-256r1   N)r   r   r   r   r   r   r   r   r   r8   ©   s   r8   c               @   s   e Zd ZdZdZdS )ÚSHA3_384zsha3-384r5   N)r   r   r   r   r   r   r   r   r   r9   ¯   s   r9   c               @   s   e Zd ZdZdZdS )ÚSHA3_512zsha3-512r+   N)r   r   r   r   r   r   r   r   r   r:   µ   s   r:   c               @   s"   e Zd ZdZdd„ ZejdƒZdS )ÚSHAKE128Zshake128c             C   s.   t |tjƒstdƒ‚|dk r$tdƒ‚|| _d S )Nzdigest_size must be an integeré   z&digest_size must be a positive integer)r    ÚsixÚinteger_typesr!   Ú
ValueErrorÚ_digest_size)r   r   r   r   r   r'   À   s
    zSHAKE128.__init__r@   N)r   r   r   r   r'   r   r(   r   r   r   r   r   r;   »   s   	r;   c               @   s"   e Zd ZdZdd„ ZejdƒZdS )ÚSHAKE256Zshake256c             C   s.   t |tjƒstdƒ‚|dk r$tdƒ‚|| _d S )Nzdigest_size must be an integerr<   z&digest_size must be a positive integer)r    r=   r>   r!   r?   r@   )r   r   r   r   r   r'   Ñ   s
    zSHAKE256.__init__r@   N)r   r   r   r   r'   r   r(   r   r   r   r   r   rA   Ì   s   	rA   c               @   s   e Zd ZdZdZdZdS )ÚMD5Zmd5é   r+   N)r   r   r   r   r   r,   r   r   r   r   rB   Ý   s   rB   c               @   s.   e Zd ZdZdZdZdZdd„ Zej	dƒZ
dS )	ÚBLAKE2bZblake2br+   r<   r/   c             C   s   |dkrt dƒ‚|| _d S )Nr+   zDigest size must be 64)r?   r@   )r   r   r   r   r   r'   ë   s    zBLAKE2b.__init__r@   N)r   r   r   r   Ú_max_digest_sizeÚ_min_digest_sizer,   r'   r   r(   r   r   r   r   r   rD   ä   s   rD   c               @   s.   e Zd ZdZdZdZdZdd„ Zej	dƒZ
dS )	ÚBLAKE2sZblake2sr+   r1   r<   c             C   s   |dkrt dƒ‚|| _d S )Nr1   zDigest size must be 32)r?   r@   )r   r   r   r   r   r'   ü   s    zBLAKE2s.__init__r@   N)r   r   r   r   r,   rE   rF   r'   r   r(   r   r   r   r   r   rG   õ   s   rG   )(Z
__future__r   r   r   r   r=   Zcryptographyr   Zcryptography.exceptionsr   r   r   Zcryptography.hazmat.backendsr	   Z'cryptography.hazmat.backends.interfacesr
   Zadd_metaclassÚABCMetaÚobjectr   r   r   Zregister_interfacer   r)   r-   r0   r2   r3   r4   r6   r7   r8   r9   r:   r;   rA   rB   rD   rG   r   r   r   r   Ú<module>   s`   +

