How to make a ssh connection with python

Question

Can anyone recommend something for making a ssh connection in python  I need it to be compatible with any OS    I ve already tried pyssh only to get an error with SIGCHLD  which I ve read is because Windows lacks this  I ve tried getting paramiko to work  but I ve had errors between paramiko and Crypto to the point where the latest versions of each won t work together   Python 2 6 1 currently on a Windows machine

User · Accepted Answer

Notice that this doesn t work in Windows   The module pxssh does exactly what you want  For example  to run  ls -l  and to print the output  you need to do something like that    from pexpect import pxssh s   pxssh pxssh   if not s login   localhost    myusername    mypassword        print  SSH session failed on login       print str s  else      print  SSH session login successful      s sendline   ls -l       s prompt             match the prompt     print s before       print everything before the prompt      s logout     Some links   Pxssh docs   http   dsnra jpl nasa gov software Python site-packages Contrib pxssh html Pexpect  pxssh is based on pexpect    http   pexpect readthedocs io en stable

User · Answer

You can easily make SSH connections using SSHLibrary  Read this post    https   workpython blogspot com 2020 04 creating-ssh-connections-with-python html

User · Answer

Twisted has SSH support   http   www devshed com c a Python SSH-with-Twisted   The twisted conch package adds SSH support to Twisted  This chapter shows how you can use the modules in twisted conch to build SSH servers and clients  Setting Up a Custom SSH Server The command line is an incredibly efficient interface for certain tasks  System administrators love the ability to manage applications by typing commands without having to click through a graphical user interface  An SSH shell is even better  as it   s accessible from anywhere on the Internet  You can use twisted conch to create an SSH server that provides access to a custom shell with commands you define  This shell will even support some extra features like command history  so that you can scroll through the commands you   ve already typed  How Do I Do That  Write a subclass of  twisted conch recvline HistoricRecvLine that implements your shell protocol  HistoricRecvLine is similar to twisted protocols basic LineReceiver   but with higher-level features for controlling the terminal  Write a subclass of twisted conch recvline HistoricRecvLine that implements your shell protocol  HistoricRecvLine is similar to twisted protocols basic LineReceiver  but with higher-level features for controlling the terminal  To make your shell available through SSH  you need to implement a few different classes that twisted conch needs to build an SSH server  First  you need the twisted cred authentication classes  a portal  credentials checkers  and a realm that returns avatars  Use twisted conch avatar ConchUser as the base class for your avatar  Your avatar class should also implement twisted conch interfaces ISession   which includes an openShell method in which you create a Protocol to manage the user   s interactive session  Finally  create a twisted conch ssh factory SSHFactory object and set its portal attribute to an instance of your portal  Example 10-1 demonstrates a custom SSH server that authenticates users by their username and password  It gives each user a shell that provides several commands  Example 10-1  sshserver py  from twisted cred import portal  checkers  credentials from twisted conch import error  avatar  recvline  interfaces as conchinterfaces from twisted conch ssh import factory  userauth  connection  keys  session  common from twisted conch insults import insults from twisted application import service  internet from zope interface import implements import os  class SSHDemoProtocol recvline HistoricRecvLine       def   init   self  user           self user   user      def connectionMade self          recvline HistoricRecvLine connectionMade self          self terminal write  quot Welcome to my test SSH server  quot           self terminal nextLine            self do help           self showPrompt        def showPrompt self            self terminal write  quot    quot        def getCommandFunc self  cmd           return getattr self     do       cmd  None       def lineReceived self  line           line   line strip           if line               cmdAndArgs   line split               cmd   cmdAndArgs 0              args   cmdAndArgs 1               func   self getCommandFunc cmd              if func                  try                     func  args                 except Exception  e                      self terminal write  quot Error   s quot    e                     self terminal nextLine               else                 self terminal write  quot No such command  quot                  self terminal nextLine           self showPrompt        def do help self  cmd                quot Get help on a command  Usage  help command quot          if cmd               func   self getCommandFunc cmd              if func                  self terminal write func   doc                    self terminal nextLine                   return          publicMethods   filter              lambda funcname  funcname startswith    do       dir self            commands    cmd replace    do           1  for cmd in publicMethods           self terminal write  quot Commands   quot     quot   quot  join commands           self terminal nextLine        def do echo self   args            quot Echo a string  Usage  echo my line of text quot          self terminal write  quot   quot  join args            self terminal nextLine        def do whoami self            quot Prints your user name  Usage  whoami quot          self terminal write self user username          self terminal nextLine        def do quit self            quot Ends your session  Usage  quit quot           self terminal write  quot Thanks for playing  quot           self terminal nextLine            self terminal loseConnection        def do clear self            quot Clears the screen  Usage  clear quot           self terminal reset    class SSHDemoAvatar avatar ConchUser        implements conchinterfaces ISession       def   init   self  username            avatar ConchUser   init   self           self username   username          self channelLookup update     session    session SSHSession        def openShell self  protocol            serverProtocol   insults ServerProtocol SSHDemoProtocol  self          serverProtocol makeConnection protocol          protocol makeConnection session wrapProtocol serverProtocol        def getPty self  terminal  windowSize  attrs           return None      def execCommand self  protocol  cmd            raise NotImplementedError      def closed self           pass  class SSHDemoRealm      implements portal IRealm       def requestAvatar self  avatarId  mind   interfaces           if conchinterfaces IConchUser in interfaces              return interfaces 0   SSHDemoAvatar avatarId   lambda  None         else              raise Exception   quot No supported interfaces found  quot   def getRSAKeys        if not  os path exists    public key     and os path exists    private key                 generate a RSA keypair         print  quot Generating RSA keypair    quot           from Crypto PublicKey import RSA          KEY LENGTH   1024         rsaKey   RSA generate KEY LENGTH  common entropy get bytes          publicKeyString   keys makePublicKeyString rsaKey           privateKeyString   keys makePrivateKeyString rsaKey            save keys for next time         file    public key        w b     write publicKeyString          file    private key        w b     write privateKeyString          print  quot done  quot      else          publicKeyString   file    public key     read           privateKeyString   file    private key     read        return publicKeyString  privateKeyString  if   name       quot   main   quot       sshFactory   factory SSHFactory        sshFactory portal   portal Portal SSHDemoRealm        users       admin        aaa        guest        bbb         sshFactory portal registerChecker   checkers InMemoryUsernamePasswordDatabaseDontUse   users        pubKeyString  privKeyString   getRSAKeys       sshFactory publicKeys                ssh-rsa     keys getPublicKeyString data pubKeyString       sshFactory privateKeys                ssh-rsa     keys getPrivateKeyObject data privKeyString        from twisted internet import reactor      reactor listenTCP 2222  sshFactory       reactor run     mospagebreak title Setting Up a Custom SSH Server continued    sshserver py will run an SSH server on port 2222  Connect to this server with an SSH client using the username admin and password aaa  and try typing some commands     ssh admin localhost -p 2222  admin localhost   s password  aaa   gt  gt  gt  Welcome to my test SSH server    Commands  clear echo help quit whoami   whoami admin   help echo Echo a string  Usage  echo my line of text   echo hello SSH world  hello SSH world    quit  Connection to localhost closed

[python] How to make a ssh connection with python?

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