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o �)%a� � @ s� d dl Z d dlZd dlmZ d dlmZ d dlmZ dZdddd �Z G d d � d e �Z G d d � d e �Z G dd� de �Z G dd� de jd�ZeZG dd� de jd�ZeZG dd� de jd�ZeZdS )� N)�utils)� _get_backend)� serializationi �return� DHParametersc C s t |�}|�| |�S �N)r �generate_dh_parameters)� generator�key_size�backend� r �N/usr/lib/python3/dist-packages/cryptography/hazmat/primitives/asymmetric/dh.py�generate_parameters s r c @ sb e Zd Zddededeje fdd�Zdd� Zd d � Zdd d �Z e � d �Z e � d�Z e � d�ZdS )�DHParameterNumbersN�p�g�qc C sv t |t�r t |t�std��|d urt |t�std��|dk r#td��|�� tk r0td�t���|| _|| _|| _ d S )Nzp and g must be integerszq must be integer or None� z!DH generator must be 2 or greaterz#p (modulus) must be at least {}-bit) � isinstance�int� TypeError� ValueError� bit_length�_MIN_MODULUS_SIZE�format�_p�_g�_q)�selfr r r r r r �__init__ s � zDHParameterNumbers.__init__c C s2 t |t�stS | j|jko| j|jko| j|jkS r )r r �NotImplementedr r r �r �otherr r r �__eq__) s "�zDHParameterNumbers.__eq__c C � | |k S r r r! r r r �__ne__1 � zDHParameterNumbers.__ne__c C � t |�}|�| �S r )r �load_dh_parameter_numbers�r r r r r � parameters4 � z DHParameterNumbers.parametersr r r r )�__name__� __module__� __qualname__r �typing�Optionalr r# r% r* r �read_only_propertyr r r r r r r r s r c @ �J e Zd Zdefdd�Zdd� Zdd� Zddd d �Ze� d �Z e� d�Z dS )�DHPublicNumbers�parameter_numbersc C �4 t |t�s td��t |t�std��|| _|| _d S )Nzy must be an integer.z5parameters must be an instance of DHParameterNumbers.)r r r r �_y�_parameter_numbers)r �yr4 r r r r > � � zDHPublicNumbers.__init__c C �& t |t�stS | j|jko| j|jkS r )r r3 r r6 r7 r! r r r r# J � �zDHPublicNumbers.__eq__c C r$ r r r! r r r r% S r& zDHPublicNumbers.__ne__Nr � DHPublicKeyc C r' r )r �load_dh_public_numbersr) r r r � public_keyV r+ zDHPublicNumbers.public_keyr6 r7 r )r r< ) r, r- r. r r r# r% r> r r1 r8 r4 r r r r r3 = � r3 c @ r2 )�DHPrivateNumbers�public_numbersc C r5 )Nzx must be an integer.z6public_numbers must be an instance of DHPublicNumbers.)r r r r3 �_x�_public_numbers)r �xrA r r r r _ r9 zDHPrivateNumbers.__init__c C r: r )r r@ r rB rC r! r r r r# k r; zDHPrivateNumbers.__eq__c C r$ r r r! r r r r% t r& zDHPrivateNumbers.__ne__Nr � DHPrivateKeyc C r' r )r �load_dh_private_numbersr) r r r � private_keyw r+ z DHPrivateNumbers.private_keyrC rB r �r rE ) r, r- r. r3 r r# r% rG r r1 rA rD r r r r r@ ^ r? r@ c @ sL e Zd Zejddd��Zejdddddefd d ��Zejdefd d ��Z d S )r r rE c C � dS )z7 Generates and returns a DHPrivateKey. Nr �r r r r �generate_private_key� � z!DHParameters.generate_private_key�encoding�serialization.Encodingr z serialization.ParameterFormatc C rI )z= Returns the parameters serialized as bytes. Nr �r rM r r r r �parameter_bytes� rL z DHParameters.parameter_bytesc C rI )z/ Returns a DHParameterNumbers. Nr rJ r r r r4 � rL z DHParameters.parameter_numbersNrH ) r, r- r. �abc�abstractmethodrK �bytesrP r r4 r r r r r s �� � )� metaclassc @ sd e Zd Zejdefdd��Zejdefdd��Z ejde fdd��Z ejdd d d de fd d ��Z dS )r< r c C rI �z6 The bit length of the prime modulus. Nr rJ r r r r � rL zDHPublicKey.key_sizec C rI )zJ The DHParameters object associated with this public key. Nr rJ r r r r* � rL zDHPublicKey.parametersc C rI )z, Returns a DHPublicNumbers. Nr rJ r r r rA � rL zDHPublicKey.public_numbersrM rN r zserialization.PublicFormatc C rI �z6 Returns the key serialized as bytes. Nr rO r r r � public_bytes� rL zDHPublicKey.public_bytesN)r, r- r. rQ �abstractpropertyr r rR r r* r3 rA rS rW r r r r r< � s ���r< c @ s� e Zd Zejdefdd��Zejdefdd��Z ejde fdd��Z ejdede fd d ��Z ejdefd d ��Zejd dddddde fdd��ZdS )rE r c C rI rU r rJ r r r r � rL zDHPrivateKey.key_sizec C rI )zC The DHPublicKey associated with this private key. Nr rJ r r r r> � rL zDHPrivateKey.public_keyc C rI )zK The DHParameters object associated with this private key. Nr rJ r r r r* � rL zDHPrivateKey.parameters�peer_public_keyc C rI )zn Given peer's DHPublicKey, carry out the key exchange and return shared key as bytes. Nr )r rY r r r �exchange� rL zDHPrivateKey.exchangec C rI )z- Returns a DHPrivateNumbers. Nr rJ r r r �private_numbers� rL z DHPrivateKey.private_numbersrM rN r zserialization.PrivateFormat�encryption_algorithmz(serialization.KeySerializationEncryptionc C rI rV r )r rM r r\ r r r � private_bytes� rL zDHPrivateKey.private_bytesN)r, r- r. rQ rX r r rR r< r> r r* rS rZ r@ r[ r] r r r r rE � s* ����rE r )r r )rQ r/ � cryptographyr � cryptography.hazmat.backendsr � cryptography.hazmat.primitivesr r r �objectr r3 r@ �ABCMetar � DHParametersWithSerializationr< � DHPublicKeyWithSerializationrE � DHPrivateKeyWithSerializationr r r r �<module> s '!! ,
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