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ƒƒƒƒZdS )$é )Úabsolute_importÚdivisionÚprint_functionN)Úutilsc @ s( e Zd Zejdd„ ƒZejdd„ ƒZdS )ÚModec C s dS )z@
A string naming this mode (e.g. "ECB", "CBC").
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Checks that all the necessary invariants of this (mode, algorithm)
combination are met.
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The value of the initialization vector for this mode as bytes.
Nr )r r r r Úinitialization_vector s z2ModeWithInitializationVector.initialization_vectorN)r
r r r r r r r r r r s r c @ s e Zd Zejdd„ ƒZdS )Ú
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The value of the tweak for this mode as bytes.
Nr )r r r r Útweak) s zModeWithTweak.tweakN)r
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The value of the nonce for this mode as bytes.
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The value of the tag supplied to the constructor of this mode.
Nr )r r r r Útag; s z ModeWithAuthenticationTag.tagN)r
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r1 c @ s* e Zd Zd Zdd„ ZejdƒZdd„ ZdS )ÚCTRc C s t jd|ƒ || _d S )Nr )r r& Ú_nonce)r r r r r r( ® s z CTR.__init__r3 c C s: t | |ƒ t| jƒd |jkr6tdjt| jƒ| jƒƒ‚d S )Nr z Invalid nonce size ({}) for {}.)r r r r! r r" r
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„ Z dS )ÚGCMé é' r r é@ Nr+ c C st t jd|ƒ t|ƒdkr tdƒ‚|| _|d k rdt jd|ƒ |dk rJtdƒ‚t|ƒ|k rdtdj|ƒƒ‚|| _|| _d S )Nr r z-initialization_vector must be at least 1 byter é zmin_tag_length must be >= 4z.Authentication tag must be {} bytes or longer.) r r& r r r' Ú _check_bytesr" Ú_tagZ_min_tag_length)r r r Zmin_tag_lengthr r r r( Æ s z GCM.__init__r: r' c C s t | |ƒ d S )N)r )r r r r r r Þ s zGCM.validate_for_algorithml l ÿÿl àÿ? l l )Nr+ ) r
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