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Editing: factory.cpython-38.pyc
U W[� � @ sn d Z ddlmZmZ ddlmZ ddlmZ ddlm Z ddl m Z m Z m Z mZ ddlZG dd � d ej�ZdS ) z� A Factory for SSH servers. See also L{twisted.conch.openssh_compat.factory} for OpenSSH compatibility. Maintainer: Paul Swartz � )�division�absolute_import)�protocol)�log)�error)�_kex� transport�userauth� connectionNc @ s\ e Zd ZdZejZeje j d�Z dd� Z dd� Z dd� 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 �;/usr/lib/python3/dist-packages/twisted/conch/ssh/factory.py� startFactory! s zSSHFactory.startFactoryc C s@ t j�| |�}| j�� |_| js<t�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. 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)�.0Z kexAlgorithmr r r � <listcomp>> s �z,SSHFactory.buildProtocol.<locals>.<listcomp>) r �Factory� buildProtocolr �keysZsupportedPublicKeysr r �msgZsupportedKeyExchanges)r Zaddr�tr r r r / 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 E 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 P 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 )N)�abs)�i��bitsr r �<lambda>m � z'SSHFactory.getDHPrime.<locals>.<lambda>)�keyr )�sortedr r �randomZchoice)r r% Z primesKeysZrealBitsr r$ r � getDHPrimee 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 �servicer r r � getServicer s zSSHFactory.getServiceN)�__name__� __module__� __qualname__�__doc__r ZSSHServerTransportr r ZSSHUserAuthServerr Z SSHConnectionr, r r r r r r+ r. r r r r r s � r )r2 Z __future__r r Ztwisted.internetr Ztwisted.pythonr Z twisted.conchr Ztwisted.conch.sshr r r r r* r r r r r r �<module> s
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