o
    5Îhù  ã                   @   sZ   d Z ddlmZ ddlZddlmZmZmZ dgZdd„ Z	dd	„ Z
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ZG dd„ deƒZdS )a¹  
passlib.crypto._md4 -- fallback implementation of MD4

Helper implementing insecure and obsolete md4 algorithm.
used for NTHASH format, which is also insecure and broken,
since it's just md4(password).

Implementated based on rfc at http://www.faqs.org/rfcs/rfc1320.html

.. note::

    This shouldn't be imported directly, it's merely used conditionally
    by ``passlib.crypto.lookup_hash()`` when a native implementation can't be found.
é    )ÚhexlifyN)Úbascii_to_strÚirangeÚPY3Úmd4c                 C   s   | |@ |  |@ B S ©N© ©ÚxÚyÚzr   r   úg/var/www/html/construction_image-detection-poc/venv/lib/python3.10/site-packages/passlib/crypto/_md4.pyÚF   s   r   c                 C   s   | |@ | |@ B ||@ B S r   r   r	   r   r   r   ÚG!   s   r   l   ÿÿ c                   @   sŠ  e Zd ZdZd Zd ZZdZdZdZ	dZ
d<dd„Zg d¢g d	¢g d
¢g d¢g d¢g d¢g d¢g d¢g d¢g d¢g d¢g d¢g d¢g d¢g d¢g d¢gZg d¢g d¢g d¢g d¢g d¢g d¢g d¢g d¢g d¢g d ¢g d!¢g d"¢g d#¢g d$¢g d%¢g d&¢gZg d¢g d'¢g d(¢g d)¢g d¢g d*¢g d¢g d+¢g d¢g d,¢g d-¢g d.¢g d#¢g d/¢g d0¢g d1¢gZd2d3„ Zd4d5„ Zd6d7„ Zd8d9„ Zd:d;„ ZdS )=r   aÓ  pep-247 compatible implementation of MD4 hash algorithm

    .. attribute:: digest_size

        size of md4 digest in bytes (16 bytes)

    .. method:: update

        update digest by appending additional content

    .. method:: copy

        create clone of digest object, including current state

    .. method:: digest

        return bytes representing md4 digest of current content

    .. method:: hexdigest

        return hexadecimal version of digest
    é   é@   r   Nc                 C   s,   d| _ g d¢| _d| _|r|  |¡ d S d S )Nr   )i#Egl   ‰+›_ l   þ\u1 ivT2ó    )Ú_countÚ_stateÚ_bufÚupdate)ÚselfÚcontentr   r   r   Ú__init__N   s   
ÿzmd4.__init__)r   é   é   é   r   r   )r   r   r   r   r   é   )r   r   r   r   r   é   )r   r   r   r   r   é   )r   r   r   r   é   r   )r   r   r   r   é   r   )r   r   r   r   é   r   )r   r   r   r   r   r   )r   r   r   r   é   r   )r   r   r   r   é	   r   )r   r   r   r   é
   r   )r   r   r   r   r   r   )r   r   r   r   é   r   )r   r   r   r   é   r   )r   r   r   r   é   r   )r   r   r   r   é   r   )r   r   r   r   r    r!   )r   r   r   r   r#   r$   )r   r   r   r   r&   r'   )r   r   r   r   r   r   )r   r   r   r   r!   r!   )r   r   r   r   r$   r$   )r   r   r   r   r'   r'   )r   r   r   r   r   r   )r   r   r   r   r"   r!   )r   r   r   r   r%   r$   )r   r   r   r   r(   r'   )r   r   r   r   r   r   )r   r   r   r   r   r!   )r   r   r   r   r   r$   )r   r   r   r   r)   r'   )r   r   r   r   r#   r$   )r   r   r   r   r    r   )r   r   r   r   r&   r)   )r   r   r   r   r%   r$   )r   r   r   r   r(   r)   )r   r   r   r   r$   r$   )r   r   r   r   r!   r   )r   r   r   r   r'   r)   )r   r   r   r   r   r$   )r   r   r   r   r   r   )r   r   r   r   r)   r)   c                 C   sl  t  d|¡}| j}t|ƒ}| jD ],\}}}}}	}
|| t|| || || ƒ ||	  t@ }||
> t@ |d|
 ?  ||< q| jD ].\}}}}}	}
|| t|| || || ƒ ||	  d t@ }||
> t@ |d|
 ?  ||< q@| j	D ].\}}}}}	}
|| || || A || A  ||	  d t@ }||
> t@ |d|
 ?  ||< qrt
dƒD ]}|| ||  t@ ||< q¥dS )zprocess 64 byte blockz<16Ié    i™y‚Zi¡ëÙnr    N)ÚstructÚunpackr   ÚlistÚ_round1r   ÚMASK_32Ú_round2r   Ú_round3r   )r   ÚblockÚXÚorigÚstateÚaÚbÚcÚdÚkÚsÚtÚir   r   r   Ú_processš   s   ,00ÿzmd4._processc                 C   sŠ   t |tƒstrtdƒ‚| d¡}| j}|r|| }d}t|ƒ}	 |d }||kr;|  |||… ¡ |  jd7  _|}n	||d … | _d S q )Nzexpected bytesÚasciir   Tr   r   )	Ú
isinstanceÚbytesr   Ú	TypeErrorÚencoder   Úlenr>   r   )r   r   ÚbufÚidxÚendÚnextr   r   r   r   ¶   s$   

øz
md4.updatec                 C   s&   t ƒ }| j|_t| jƒ|_| j|_|S r   )r   r   r-   r   r   )r   Úotherr   r   r   ÚcopyÌ   s
   zmd4.copyc                 C   sÆ   t | jƒ}| j}| jd t|ƒd  }|d ddt|ƒ d   t d|t@ |d? t@ ¡ }t|ƒd	krG|  |d d… ¡ |  |dd … ¡ nt|ƒdksOJ ‚|  |¡ tjd
g| j¢R Ž }|| _|S )Ni   r#   ó   €ó    éw   r   z<2Ir*   é€   z<4I)	r-   r   r   r   rD   r+   Úpackr/   r>   )r   r4   rE   Úmsglenr2   Úoutr   r   r   ÚdigestÓ   s   
ÿ
z
md4.digestc                 C   s   t t|  ¡ ƒƒS r   )r   r   rR   )r   r   r   r   Ú	hexdigestë   s   zmd4.hexdigestr   )Ú__name__Ú
__module__Ú__qualname__Ú__doc__ÚnameÚdigest_sizeÚ
digestsizeÚ
block_sizer   r   r   r   r.   r0   r1   r>   r   rJ   rR   rS   r   r   r   r   r   ,   s‚    
	ííí)rW   Úbinasciir   r+   Úpasslib.utils.compatr   r   r   Ú__all__r   r   r/   Úobjectr   r   r   r   r   Ú<module>   s    