o
    e                      @  sn  d dl mZ d dlZd dlZd dlmZ d dlmZmZ d dl	m
Z
mZ d dlmZ G dd dejd	ZG d
d deejd	ZG dd deejd	ZG dd deejd	ZG dd deejd	Zd4ddZd5ddZd6d d!Zd7d"d#ZG d$d% d%eZG d&d' d'eZG d(d) d)eZG d*d+ d+eZG d,d- d-eZG d.d/ d/eZG d0d1 d1eZG d2d3 d3eeZdS )8    )annotationsN)utils)UnsupportedAlgorithm_Reasons)BlockCipherAlgorithmCipherAlgorithm)
algorithmsc                   @  s0   e Zd ZeejdddZejddd	Zd
S )Modereturnstrc                 C     dS )z@
        A string naming this mode (e.g. "ECB", "CBC").
        N selfr   r   _/var/www/html/venv/lib/python3.10/site-packages/cryptography/hazmat/primitives/ciphers/modes.pyname       z	Mode.name	algorithmr   Nonec                 C  r   )zq
        Checks that all the necessary invariants of this (mode, algorithm)
        combination are met.
        Nr   r   r   r   r   r   validate_for_algorithm   r   zMode.validate_for_algorithmN)r
   r   r   r   r
   r   )__name__
__module____qualname__propertyabcabstractmethodr   r   r   r   r   r   r	      s    r	   )	metaclassc                   @      e Zd ZeejdddZdS )ModeWithInitializationVectorr
   bytesc                 C  r   )zP
        The value of the initialization vector for this mode as bytes.
        Nr   r   r   r   r   initialization_vector$   r   z2ModeWithInitializationVector.initialization_vectorNr
   r!   )r   r   r   r   r   r   r"   r   r   r   r   r    #       r    c                   @  r   )ModeWithTweakr
   r!   c                 C  r   )z@
        The value of the tweak for this mode as bytes.
        Nr   r   r   r   r   tweak-   r   zModeWithTweak.tweakNr#   )r   r   r   r   r   r   r&   r   r   r   r   r%   ,   r$   r%   c                   @  r   )ModeWithNoncer
   r!   c                 C  r   )z@
        The value of the nonce for this mode as bytes.
        Nr   r   r   r   r   nonce6   r   zModeWithNonce.nonceNr#   )r   r   r   r   r   r   r(   r   r   r   r   r'   5   r$   r'   c                   @  r   )ModeWithAuthenticationTagr
   typing.Optional[bytes]c                 C  r   )zP
        The value of the tag supplied to the constructor of this mode.
        Nr   r   r   r   r   tag?   r   zModeWithAuthenticationTag.tagNr
   r*   )r   r   r   r   r   r   r+   r   r   r   r   r)   >   r$   r)   r   r   r   r
   r   c                 C  s$   |j dkr|jdkrtdd S d S )N   AESz=Only 128, 192, and 256 bit keys are allowed for this AES mode)key_sizer   
ValueErrorr   r   r   r   _check_aes_key_lengthG   s
   r1   r   c                 C  s0   t | jd |jkrtdt | j| jd S )N   zInvalid IV size ({}) for {}.)lenr"   
block_sizer0   formatr   r   r   r   r   _check_iv_lengthN   s   r6   r(   r!   r   r   c                 C  sL   t |tst| dtjt| d |jkr$tdt|  d| dd S )N" requires a block cipher algorithmr2   zInvalid nonce size (z) for .)
isinstancer   r   r   UNSUPPORTED_CIPHERr3   r4   r0   )r(   r   r   r   r   r   _check_nonce_lengthY   s   
r;   c                 C  s4   t |tst|  dtjt| | t| | d S )Nr7   )r9   r   r   r   r:   r1   r6   r   r   r   r   _check_iv_and_key_lengthe   s   

r<   c                   @  ,   e Zd Zd Zd	ddZed
ddZeZdS )CBCr"   r!   c                 C     t d| || _d S Nr"   r   _check_byteslike_initialization_vectorr   r"   r   r   r   __init__t      
zCBC.__init__r
   c                 C     | j S NrC   r   r   r   r   r"   x      zCBC.initialization_vectorNr"   r!   r#   	r   r   r   r   rE   r   r"   r<   r   r   r   r   r   r>   q       
r>   c                   @  2   e Zd Zd ZdddZedddZdddZdS )XTSr&   r!   c                 C  s*   t d| t|dkrtd|| _d S )Nr&      z!tweak must be 128-bits (16 bytes))r   rB   r3   r0   _tweak)r   r&   r   r   r   rE      s   
zXTS.__init__r
   c                 C  rG   rH   )rQ   r   r   r   r   r&      rJ   z	XTS.tweakr   r   r   c                 C  s0   t |tjtjfrtd|jdvrtdd S )Nz\The AES128 and AES256 classes do not support XTS, please use the standard AES class instead.)r-   i   z\The XTS specification requires a 256-bit key for AES-128-XTS and 512-bit key for AES-256-XTS)r9   r   AES128AES256	TypeErrorr/   r0   r   r   r   r   r      s   
zXTS.validate_for_algorithmN)r&   r!   r#   r   )r   r   r   r   rE   r   r&   r   r   r   r   r   rO      s    
rO   c                   @  s   e Zd Zd ZeZdS )ECBN)r   r   r   r   r1   r   r   r   r   r   rU      s    rU   c                   @  r=   )OFBr"   r!   c                 C  r?   r@   rA   rD   r   r   r   rE      rF   zOFB.__init__r
   c                 C  rG   rH   rI   r   r   r   r   r"      rJ   zOFB.initialization_vectorNrK   r#   rL   r   r   r   r   rV      rM   rV   c                   @  r=   )CFBr"   r!   c                 C  r?   r@   rA   rD   r   r   r   rE      rF   zCFB.__init__r
   c                 C  rG   rH   rI   r   r   r   r   r"      rJ   zCFB.initialization_vectorNrK   r#   rL   r   r   r   r   rW      rM   rW   c                   @  r=   )CFB8r"   r!   c                 C  r?   r@   rA   rD   r   r   r   rE      rF   zCFB8.__init__r
   c                 C  rG   rH   rI   r   r   r   r   r"      rJ   zCFB8.initialization_vectorNrK   r#   rL   r   r   r   r   rX      rM   rX   c                   @  rN   )CTRr(   r!   c                 C  r?   )Nr(   )r   rB   _nonce)r   r(   r   r   r   rE      rF   zCTR.__init__r
   c                 C  rG   rH   )rZ   r   r   r   r   r(      rJ   z	CTR.noncer   r   r   c                 C  s   t | | t| j| j| d S rH   )r1   r;   r(   r   r   r   r   r   r      s   
zCTR.validate_for_algorithmN)r(   r!   r#   r   )r   r   r   r   rE   r   r(   r   r   r   r   r   rY      s    
rY   c                   @  sN   e Zd Zd ZdZdZ		ddddZedddZedddZ	dddZ
dS )GCMl   ? l            NrP   r"   r!   r+   r*   min_tag_lengthintc                 C  s   t d| t|dk st|dkrtd|| _|d ur8t d| |dk r+tdt||k r8td||| _|| _d S )	Nr"   r2      zIinitialization_vector must be between 8 and 128 bytes (64 and 1024 bits).r+      zmin_tag_length must be >= 4z.Authentication tag must be {} bytes or longer.)	r   rB   r3   r0   rC   _check_bytesr5   _tag_min_tag_length)r   r"   r+   r\   r   r   r   rE      s$   
zGCM.__init__r
   c                 C  rG   rH   )ra   r   r   r   r   r+      rJ   zGCM.tagc                 C  rG   rH   rI   r   r   r   r   r"     rJ   zGCM.initialization_vectorr   r   r   c                 C  sX   t | | t|tstdtj|jd }| jd ur(t| j|kr*t	d
|d S d S )Nz%GCM requires a block cipher algorithmr2   z0Authentication tag cannot be more than {} bytes.)r1   r9   r   r   r   r:   r4   ra   r3   r0   r5   )r   r   block_size_bytesr   r   r   r     s   


zGCM.validate_for_algorithm)NrP   )r"   r!   r+   r*   r\   r]   r,   r#   r   )r   r   r   r   _MAX_ENCRYPTED_BYTES_MAX_AAD_BYTESrE   r   r+   r"   r   r   r   r   r   r[      s    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   ) 
__future__r   r   typingcryptographyr   cryptography.exceptionsr   r   /cryptography.hazmat.primitives._cipheralgorithmr   r   &cryptography.hazmat.primitives.ciphersr   ABCMetar	   r    r%   r'   r)   r1   r6   r;   r<   r>   rO   rU   rV   rW   rX   rY   r[   r   r   r   r   <module>   s0   			
	


