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l_                 @   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G dd deZejejG d	d
 d
eZejejG dd deZejeG dd deZejeG dd deZejeG dd deZejeG dd deZejeG dd deZejeG dd deZejeG dd deZejeG dd deZejeG dd deZejeG dd  d eZ ejeG d!d" d"eZ!ejeG d#d$ d$eZ"ejeejeG d%d& d&eZ#ejeejeG d'd( d(eZ$ejeG d)d* d*eZ%ejeG d+d, d,eZ&ejeG d-d. d.eZ'dS )/    )absolute_importdivisionprint_functionN)utils)AlreadyFinalizedUnsupportedAlgorithm_Reasons)_get_backend)HashBackendc               @   s(   e Zd Zejdd Zejdd ZdS )HashAlgorithmc             C   s   dS )zH
        A string naming this algorithm (e.g. "sha256", "md5").
        N )selfr   r   /usr/lib64/python3.6/hashes.pyname   s    zHashAlgorithm.namec             C   s   dS )z<
        The size of the resulting digest in bytes.
        Nr   )r   r   r   r   digest_size   s    zHashAlgorithm.digest_sizeN)__name__
__module____qualname__abcabstractpropertyr   r   r   r   r   r   r      s   r   c               @   sD   e Zd Zejdd Zejdd Zejdd Zejdd Z	d	S )
HashContextc             C   s   dS )zD
        A HashAlgorithm that will be used by this context.
        Nr   )r   r   r   r   	algorithm&   s    zHashContext.algorithmc             C   s   dS )z@
        Processes the provided bytes through the hash.
        Nr   )r   datar   r   r   update,   s    zHashContext.updatec             C   s   dS )zR
        Finalizes the hash context and returns the hash digest as bytes.
        Nr   )r   r   r   r   finalize2   s    zHashContext.finalizec             C   s   dS )zM
        Return a HashContext that is a copy of the current context.
        Nr   )r   r   r   r   copy8   s    zHashContext.copyN)
r   r   r   r   r   r   abstractmethodr   r   r   r   r   r   r   r   $   s   r   c               @   s   e Zd ZdZdS )ExtendableOutputFunctionz7
    An interface for extendable output functions.
    N)r   r   r   __doc__r   r   r   r   r   ?   s   r   c               @   s8   e Zd ZdddZejdZdd Zdd Zd	d
 Z	dS )HashNc             C   s`   t |}t|tstdtjt|ts0td|| _|| _	|d krV| j	j
| j| _n|| _d S )Nz.Backend object does not implement HashBackend.z*Expected instance of hashes.HashAlgorithm.)r	   
isinstancer
   r   r   ZBACKEND_MISSING_INTERFACEr   	TypeError
_algorithm_backendZcreate_hash_ctxr   _ctx)r   r   backendctxr   r   r   __init__H   s    

zHash.__init__r"   c             C   s.   | j d krtdtjd| | j j| d S )NzContext was already finalized.r   )r$   r   r   Z_check_bytesliker   )r   r   r   r   r   r   ]   s    
zHash.updatec             C   s*   | j d krtdt| j| j| j j dS )NzContext was already finalized.)r%   r&   )r$   r   r   r   r#   r   )r   r   r   r   r   c   s    
z	Hash.copyc             C   s&   | j d krtd| j j }d | _ |S )NzContext was already finalized.)r$   r   r   )r   Zdigestr   r   r   r   j   s
    

zHash.finalize)NN)
r   r   r   r'   r   read_only_propertyr   r   r   r   r   r   r   r   r   F   s
   

r   c               @   s   e Zd ZdZdZdZdS )SHA1Zsha1   @   N)r   r   r   r   r   
block_sizer   r   r   r   r)   r   s   r)   c               @   s   e Zd ZdZdZdZdS )
SHA512_224z
sha512-224      N)r   r   r   r   r   r,   r   r   r   r   r-   y   s   r-   c               @   s   e Zd ZdZdZdZdS )
SHA512_256z
sha512-256    r/   N)r   r   r   r   r   r,   r   r   r   r   r0      s   r0   c               @   s   e Zd ZdZdZdZdS )SHA224Zsha224r.   r+   N)r   r   r   r   r   r,   r   r   r   r   r2      s   r2   c               @   s   e Zd ZdZdZdZdS )SHA256Zsha256r1   r+   N)r   r   r   r   r   r,   r   r   r   r   r3      s   r3   c               @   s   e Zd ZdZdZdZdS )SHA384Zsha3840   r/   N)r   r   r   r   r   r,   r   r   r   r   r4      s   r4   c               @   s   e Zd ZdZdZdZdS )SHA512Zsha512r+   r/   N)r   r   r   r   r   r,   r   r   r   r   r6      s   r6   c               @   s   e Zd ZdZdZdS )SHA3_224zsha3-224r.   N)r   r   r   r   r   r   r   r   r   r7      s   r7   c               @   s   e Zd ZdZdZdS )SHA3_256zsha3-256r1   N)r   r   r   r   r   r   r   r   r   r8      s   r8   c               @   s   e Zd ZdZdZdS )SHA3_384zsha3-384r5   N)r   r   r   r   r   r   r   r   r   r9      s   r9   c               @   s   e Zd ZdZdZdS )SHA3_512zsha3-512r+   N)r   r   r   r   r   r   r   r   r   r:      s   r:   c               @   s"   e Zd ZdZdd ZejdZdS )SHAKE128Zshake128c             C   s.   t |tjstd|dk r$td|| _d S )Nzdigest_size must be an integer   z&digest_size must be a positive integer)r    sixinteger_typesr!   
ValueError_digest_size)r   r   r   r   r   r'      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ZdS )SHAKE256Zshake256c             C   s.   t |tjstd|dk r$td|| _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'      s
    zSHAKE256.__init__r@   N)r   r   r   r   r'   r   r(   r   r   r   r   r   rA      s   	rA   c               @   s   e Zd ZdZdZdZdS )MD5Zmd5   r+   N)r   r   r   r   r   r,   r   r   r   r   rB      s   rB   c               @   s.   e Zd ZdZdZdZdZdd Zej	dZ
dS )	BLAKE2bZblake2br+   r<   r/   c             C   s   |dkrt d|| _d S )Nr+   zDigest size must be 64)r?   r@   )r   r   r   r   r   r'      s    zBLAKE2b.__init__r@   N)r   r   r   r   _max_digest_size_min_digest_sizer,   r'   r   r(   r   r   r   r   r   rD      s   rD   c               @   s.   e Zd ZdZdZdZdZdd Zej	dZ
dS )	BLAKE2sZblake2sr+   r1   r<   c             C   s   |dkrt d|| _d S )Nr1   zDigest size must be 32)r?   r@   )r   r   r   r   r   r'      s    zBLAKE2s.__init__r@   N)r   r   r   r   r,   rE   rF   r'   r   r(   r   r   r   r   r   rG      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_metaclassABCMeta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   <module>   s`   +

