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a L��f; � @ s: d dl Z d dlZd dlmZmZmZ d dlmZ d dlm Z ej rNd dl m Z G dd� de jd�ZG d d � d ee jd�ZG d d � d ee jd�ZG d d� dee jd�Zejdeje j dd�ZG dd� deje �Zeeje je jde je j f Z G dd� de�Z G dd� de�Z G dd� de e�Z G dd� de e�Z dS ) � N)�AlreadyFinalized�AlreadyUpdated�NotYetFinalized)�CipherAlgorithm)�modes)�_CipherContextc @ sN e Zd Zejeed�dd��Zejeeed�dd��Zejed�dd ��Z d S ) � CipherContext��data�returnc C s dS )zk Processes the provided bytes through the cipher and returns the results as bytes. N� ��selfr r r ��/sparta/input/_build_configuration/image_build+validate/lib/bmcenv/lib64/python3.9/site-packages/cryptography/hazmat/primitives/ciphers/base.py�update s zCipherContext.update�r �bufr c C s dS )z� Processes the provided bytes and writes the resulting data into the provided buffer. Returns the number of bytes written. Nr �r r r r r r � update_into s zCipherContext.update_into�r c C s dS )zM Returns the results of processing the final block as bytes. Nr �r r r r �finalize' s zCipherContext.finalizeN) �__name__� __module__� __qualname__�abc�abstractmethod�bytesr �intr r r r r r r s r )� metaclassc @ s" e Zd Zejedd�dd��ZdS )�AEADCipherContextNr c C s dS )z3 Authenticates the provided bytes. Nr r r r r � authenticate_additional_data/ s z.AEADCipherContext.authenticate_additional_data)r r r r r r r! r r r r r . s r c @ s" e Zd Zejeed�dd��ZdS )�AEADDecryptionContext��tagr c C s dS )z� Returns the results of processing the final block as bytes and allows delayed passing of the authentication tag. Nr )r r$ r r r �finalize_with_tag7 s z'AEADDecryptionContext.finalize_with_tagN)r r r r r r r% r r r r r" 6 s r" c @ s e Zd Zejed�dd��ZdS )�AEADEncryptionContextr c C s dS )zb Returns tag bytes. This is only available after encryption is finalized. Nr r r r r r$ @ s zAEADEncryptionContext.tagN)r r r r �abstractpropertyr r$ r r r r r& ? s r& �ModeT)�bound� covariantc @ s� e Zd Zdeeejd�dd�Zejde d�dd��Z ejd e d�d d��Z d d� Z ejde d�d d ��Z ejd e d�dd ��Z dd � Z deeje e e f d�dd�ZdS )�CipherN)� algorithm�mode�backendc C sD t |t�std��|d ur4t |tj�s*J �|�|� || _|| _d S )Nz&Expected interface of CipherAlgorithm.)� isinstancer � TypeErrorr r( �validate_for_algorithmr, r- )r r, r- r. r r r �__init__N s zCipher.__init__z'Cipher[modes.ModeWithAuthenticationTag])r r c C s d S �Nr r r r r � encryptora s zCipher.encryptor� _CIPHER_TYPEc C s d S r3 r r r r r r4 g s c C sL t | jtj�r"| jjd ur"td��ddlm} |�| j | j�}| j |dd�S )Nz0Authentication tag must be None when encrypting.r �r. T��encrypt) r/ r- r �ModeWithAuthenticationTagr$ � ValueError�,cryptography.hazmat.backends.openssl.backendr. � create_symmetric_encryption_ctxr, � _wrap_ctx�r r. �ctxr r r r4 m s � �c C s d S r3 r r r r r � decryptorz s zCipher.decryptorc C s d S r3 r r r r r r@ � s c C s* ddl m} |�| j| j�}| j|dd�S )Nr r6 Fr7 )r; r. � create_symmetric_decryption_ctxr, r- r= r> r r r r@ � s ��_BackendCipherContext)r? r8 r c C s0 t | jtj�r$|rt|�S t|�S nt|�S d S r3 )r/ r- r r9 �_AEADEncryptionContext�_AEADDecryptionContextr )r r? r8 r r r r= � s zCipher._wrap_ctx)N)r r r r r( �typing�Anyr2 �overloadr& r4 r r" r@ �bool�Unionr= r r r r r+ M s: �� �� �� ��r+ c @ s\ e Zd ZU ejd ed< ddd�dd�Zeed�dd �Zeee d �d d �Z ed �dd�Z dS )r rB �_ctxN�r? r c C s || _ d S r3 )rJ �r r? r r r r2 � s z_CipherContext.__init__r c C s | j d u rtd��| j �|�S �N� Context was already finalized.)rJ r r r r r r r � s z_CipherContext.updater c C s | j d u rtd��| j �||�S rM )rJ r r r r r r r � s z_CipherContext.update_intor c C s& | j d u rtd��| j �� }d | _ |S rM )rJ r r r r r r r � s z_CipherContext.finalize) r r r rE �Optional�__annotations__r2 r r r r r r r r r r � s r c @ s� e Zd ZU ejd ed< eje ed< ddd�dd�Zedd�d d �Z eed �d d �Z eeed�dd�Z ed�dd�Z edd �dd�Z dS )�_AEADCipherContextrB rJ �_tagNrK c C s" || _ d| _d| _d | _d| _d S )Nr F)rJ �_bytes_processed�_aad_bytes_processedrR �_updatedrL r r r r2 � s z_AEADCipherContext.__init__)� data_sizer c C sV | j d u rtd��d| _| j|7 _| j| j jjkrRtd�| j jj| j jj���d S )NrN Tz+{} has a maximum encrypted byte limit of {}) rJ r rU rS �_mode�_MAX_ENCRYPTED_BYTESr: �format�name)r rV r r r � _check_limit� s ��z _AEADCipherContext._check_limitr c C s( | � t|�� | jd us J �| j�|�S r3 )r[ �lenrJ r r r r r r � s z_AEADCipherContext.updater c C s* | � t|�� | jd us J �| j�||�S r3 )r[ r\ rJ r r r r r r � s z _AEADCipherContext.update_intor c C s0 | j d u rtd��| j �� }| j j| _d | _ |S rM )rJ r r r$ rR r r r r r � s z_AEADCipherContext.finalizec C sn | j d u rtd��| jr td��| jt|�7 _| j| j jjkr^td� | j jj | j jj���| j � |� d S )NrN z'Update has been called on this context.z%{} has a maximum AAD byte limit of {}) rJ r rU r rT r\ rW �_MAX_AAD_BYTESr: rY rZ r! r r r r r! � s ��z/_AEADCipherContext.authenticate_additional_data)r r r rE rO rP r r2 r r[ r r r r! r r r r rQ � s rQ c @ s e Zd Zeed�dd�ZdS )rD r# c C s2 | j d u rtd��| j �|�}| j j| _d | _ |S rM )rJ r r% r$ rR )r r$ r r r r r% � s z(_AEADDecryptionContext.finalize_with_tagN)r r r r r% r r r r rD � s rD c @ s e Zd Zeed�dd��ZdS )rC r c C s& | j d urtd��| jd us J �| jS )Nz4You must finalize encryption before getting the tag.)rJ r rR r r r r r$ s �z_AEADEncryptionContext.tagN)r r r �propertyr r$ r r r r rC s rC )!r rE �cryptography.exceptionsr r r �/cryptography.hazmat.primitives._cipheralgorithmr �&cryptography.hazmat.primitives.ciphersr � TYPE_CHECKING�,cryptography.hazmat.backends.openssl.ciphersr rB �ABCMetar r r" r& �TypeVarrO r( �Genericr+ rI � ModeWithNonce� ModeWithTweak�ECB� ModeWithInitializationVectorr5 rQ rD rC r r r r �<module> s8 �O��� <
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