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The size of a block as an integer in bits (e.g. 64, 128).
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Returns the results of processing the final block as bytes.
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Authenticates the provided bytes.
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Returns tag bytes. This is only available after encryption is
finalized.
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ValueErrorr6 � create_symmetric_encryption_ctxr0 � _wrap_ctx�r �ctxr r r � encryptorg s ��zCipher.encryptorc C s | j �| j| j�}| j|dd�S )NFr9 )r6 � create_symmetric_decryption_ctxr0 r1 r> r? r r r � decryptorr s �zCipher.decryptorc C s* t | jtj�r|r
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z_CipherContext.__init__r r c C s | j d u r td��| j �|�S �N� Context was already finalized.)rK r r! r r r r r! � s
z_CipherContext.updatec C s | j d u r td��| j �||�S rL )rK r r$ r" r r r r$ � s
z_CipherContext.update_intoc C s& | j d u r td��| j �� }d | _ |S rL )rK r r% r r r r r% � s
z_CipherContext.finalizeN) r r r r8 r' r! r r$ r% r r r r rG � s
rG c @ sx e Zd Zdd� Zdefdd�Zdedefdd �Zdedefd
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deddfdd�Z dS )rF c C s" || _ d| _d| _d | _d| _d S )Nr F)rK �_bytes_processed�_aad_bytes_processed�_tag�_updatedr? r r r r8 � s
z_AEADCipherContext.__init__� data_sizec C sV | j d u r td��d| _| j|7 _| j| j jjkr)td�| j jj| j jj���d S )NrM Tz+{} has a maximum encrypted byte limit of {}) rK r rQ rN �_mode�_MAX_ENCRYPTED_BYTESr< �format�name)r rR r r r � _check_limit� s
���z _AEADCipherContext._check_limitr r c C s | � t|�� | j�|�S rD )rW �lenrK r! r r r r r! � s z_AEADCipherContext.updatec C s | � t|�� | j�||�S rD )rW rX rK r$ r" r r r r$ � s z _AEADCipherContext.update_intoc C s0 | j d u r td��| j �� }| j j| _d | _ |S rL )rK r r% r, rP r r r r r% � s
z_AEADCipherContext.finalizer, c C s2 | j d u r td��| j �|�}| j j| _d | _ |S rL )rK r r- r, rP )r r, r r r r r- � s
z$_AEADCipherContext.finalize_with_tagNc C sn | j d u r td��| jrtd��| jt|�7 _| j| j jjkr/td� | j jj
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