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f d � � Y� � � Z d S(! i ( t absolute_importt divisiont print_functionN( t utilst Modec B` s, e Z e j d � � Z e j d � � Z RS( c C` s d S( s@
A string naming this mode (e.g. "ECB", "CBC").
N( ( t self( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyt name s c C` s d S( sq
Checks that all the necessary invariants of this (mode, algorithm)
combination are met.
N( ( R t algorithm( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyt validate_for_algorithm s ( t __name__t
__module__t abct abstractpropertyR t abstractmethodR ( ( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyR s t ModeWithInitializationVectorc B` s e Z e j d � � Z RS( c C` s d S( sP
The value of the initialization vector for this mode as bytes.
N( ( R ( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyt initialization_vector s ( R R
R R R ( ( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyR s t
ModeWithTweakc B` s e Z e j d � � Z RS( c C` s d S( s@
The value of the tweak for this mode as bytes.
N( ( R ( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyt tweak) s ( R R
R R R ( ( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyR ' s t
ModeWithNoncec B` s e Z e j d � � Z RS( c C` s d S( s@
The value of the nonce for this mode as bytes.
N( ( R ( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyt nonce2 s ( R R
R R R ( ( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyR 0 s t ModeWithAuthenticationTagc B` s e Z e j d � � Z RS( c C` s d S( sP
The value of the tag supplied to the constructor of this mode.
N( ( R ( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyt tag; s ( R R
R R R ( ( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyR 9 s c C` s1 | j d k r- | j d k r- t d � � n d S( Ni t AESs= Only 128, 192, and 256 bit keys are allowed for this AES mode( t key_sizeR t
ValueError( R R ( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyt _check_aes_key_lengthB s c C` sG t | j � d | j k rC t d j t | j � | j � � � n d S( Ni s Invalid IV size ({}) for {}.( t lenR t
block_sizeR t formatR ( R R ( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyt _check_iv_lengthI s c C` s t | | � t | | � d S( N( R R ( R R ( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyt _check_iv_and_key_lengthP s
t CBCc B` s, e Z d Z d � Z e j d � Z e Z RS( R c C` s t j d | � | | _ d S( NR ( R t _check_bytesliket _initialization_vector( R R ( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyt __init__Z s R! ( R R
R R" R t read_only_propertyR R R ( ( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyR U s t XTSc B` s/ e Z d Z d � Z e j d � Z d � Z RS( R$ c C` s> t j d | � t | � d k r1 t d � � n | | _ d S( NR i s! tweak must be 128-bits (16 bytes)( R R R R t _tweak( R R ( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyR" g s R% c C` s" | j d k r t d � � n d S( Ni i s\ The XTS specification requires a 256-bit key for AES-128-XTS and 512-bit key for AES-256-XTS( i i ( R R ( R R ( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyR q s ( R R
R R" R R# R R ( ( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyR$ b s t ECBc B` s e Z d Z e Z RS( R& ( R R
R R R ( ( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyR& y s t OFBc B` s, e Z d Z d � Z e j d � Z e Z RS( R' c C` s t j d | � | | _ d S( NR ( R R R! ( R R ( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyR" � s R! ( R R
R R" R R# R R R ( ( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyR' � s t CFBc B` s, e Z d Z d � Z e j d � Z e Z RS( R( c C` s t j d | � | | _ d S( NR ( R R R! ( R R ( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyR" � s R! ( R R
R R" R R# R R R ( ( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyR( � s t CFB8c B` s, e Z d Z d � Z e j d � Z e Z RS( R) c C` s t j d | � | | _ d S( NR ( R R R! ( R R ( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyR" � s R! ( R R
R R" R R# R R R ( ( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyR) � s t CTRc B` s/ e Z d Z d � Z e j d � Z d � Z RS( R* c C` s t j d | � | | _ d S( NR ( R R t _nonce( R R ( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyR" � s R+ c C` sT t | | � t | j � d | j k rP t d j t | j � | j � � � n d S( Ni s Invalid nonce size ({}) for {}.( R R R R R R R ( R R ( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyR � s
( R R
R R" R R# R R ( ( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyR* � s t GCMc B` sP e Z d Z d
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� Z RS( R, i i' i i i@ i c C` s� t j d | � t | � d k r1 t d � � n | | _ | d k r� t j d | � | d k rq t d � � n t | � | k r� t d j | � � � q� n | | _ | | _ d S( NR i s- initialization_vector must be at least 1 byteR i s min_tag_length must be >= 4s. Authentication tag must be {} bytes or longer.(
R R R R R! t Nonet _check_bytesR t _tagt _min_tag_length( R R R t min_tag_length( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyR" � s R/ R! c C` s t | | � d S( N( R ( R R ( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyR � s I � I ��� I�� l l N( R R
R t _MAX_ENCRYPTED_BYTESt _MAX_AAD_BYTESR- R" R R# R R R ( ( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyR, � s ( t
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add_metaclasst ABCMetat objectR R R R R R R R t register_interfaceR R$ R& R' R( R) R* R, ( ( ( sT /tmp/pip-install-A1qMVe/cryptography/cryptography/hazmat/primitives/ciphers/modes.pyt <module> sP