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a k�h� � @ sj d Z ddlZddlmZ ddlmZ ddlmZmZm Z m Z ddl m Z ddl mZ G dd � d e j�ZdS ) z� A Factory for SSH servers. See also L{twisted.conch.openssh_compat.factory} for OpenSSH compatibility. Maintainer: Paul Swartz � N)�chain)�error)�_kex� connection� transport�userauth)�protocol)�Loggerc @ sb e Zd ZdZe� ZejZe j e j d�Z dd� Zdd� Zdd� Zd d � Zd d � Zd d� Zdd� ZdS )� SSHFactoryz$ A Factory for SSH servers. )� ssh-userauths ssh-connectionc C sV t | d�s| �� | _t | d�s(| �� | _| jr4| js>t�d��t | d�sR| �� | _dS )z4 Check for public and private keys. � publicKeys� privateKeyszno host keys, failing�primesN) �hasattr� getPublicKeysr �getPrivateKeysr r Z ConchError� getPrimesr ��self� r ��/root/rpmbuild/BUILDROOT/imh-python39-modules-3.9.7-92.el8.x86_64/opt/imh-python/lib/python3.9/site-packages/twisted/conch/ssh/factory.py� startFactory# s zSSHFactory.startFactoryc C sV t j�| |�}tt�dd� | j�� D ���|_| j sR| j � d� dd� |j D �|_ |S )a= Create an instance of the server side of the SSH protocol. @type addr: L{twisted.internet.interfaces.IAddress} provider @param addr: The address at which the server will listen. @rtype: L{twisted.conch.ssh.transport.SSHServerTransport} @return: The built transport. c s s | ]}|� � V qd S �N)Z supportedSignatureAlgorithms)�.0�keyr r r � <genexpr>< s z+SSHFactory.buildProtocol.<locals>.<genexpr>zTdisabling non-fixed-group key exchange algorithms because we cannot find moduli filec S s$ g | ] }t �|�s t �|�r|�qS r )r Z isFixedGroupZisEllipticCurve)r Z kexAlgorithmr r r � <listcomp>E s �z,SSHFactory.buildProtocol.<locals>.<listcomp>) r �Factory� buildProtocol�listr � from_iterabler �valuesZsupportedPublicKeysr �_log�infoZsupportedKeyExchanges)r �addr�tr r r r 0 s ����zSSHFactory.buildProtocolc C s t d��dS )z� Called when the factory is started to get the public portions of the servers host keys. Returns a dictionary mapping SSH key types to public key strings. @rtype: L{dict} zgetPublicKeys unimplementedN��NotImplementedErrorr r r r r L s zSSHFactory.getPublicKeysc C s t d��dS )z� Called when the factory is started to get the private portions of the servers host keys. Returns a dictionary mapping SSH key types to L{twisted.conch.ssh.keys.Key} objects. @rtype: L{dict} z getPrivateKeys unimplementedNr& r r r r r V s zSSHFactory.getPrivateKeysc C s dS )z� Called when the factory is started to get Diffie-Hellman generators and primes to use. Returns a dictionary mapping number of bits to lists of tuple of (generator, prime). @rtype: L{dict} Nr r r r r r ` s zSSHFactory.getPrimesc s2 t | j�� � fdd�d�}|d }t�| j| �S )z� Return a tuple of (g, p) for a Diffe-Hellman process, with p being as close to bits bits as possible. @type bits: L{int} @rtype: L{tuple} c s t | � �S r )�abs)�i��bitsr r �<lambda>q � z'SSHFactory.getDHPrime.<locals>.<lambda>)r r )�sortedr �keys�random�choice)r r+ Z primesKeysZrealBitsr r* r � getDHPrimei s zSSHFactory.getDHPrimec C s |dkst |d�r | j| S dS )z� Return a class to use as a service for the given transport. @type transport: L{transport.SSHServerTransport} @type service: L{bytes} @rtype: subclass of L{service.SSHService} r ZavatarN)r �services)r r Zservicer r r � getServiceu s zSSHFactory.getServiceN)�__name__� __module__� __qualname__�__doc__r r" r ZSSHServerTransportr r ZSSHUserAuthServerr Z SSHConnectionr3 r r r r r r2 r4 r r r r r s � r )r8 r0 � itertoolsr Z twisted.conchr Ztwisted.conch.sshr r r r Ztwisted.internetr Ztwisted.loggerr r r r r r r �<module> s
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