Administrative SSH interface for network services.
Create SSH Server public key / private key pair
$ mkdir keys $ ckeygen -b 2048 -t rsa -f keys/id_rsa
Custom protocol over SSH:
$ twistd -ny ./txsshadmin/demo.tac
Manhole REPL over SSH:
Create Your Own SSH Service
Create a Protocol Handler
Subclass txsshadmin.proto_dispatcher.BaseHandler. Override handler methods you wish to customize. When the handler is created, the SSH avatar is assigned to its avatar attribute. Each handler method is passed an instance of the dispatcher.
Create a Protocol Factory
Use txsshadmin.proto_dispatcher.makeSSHDispatcherProtocolFactory() to create a protocol factory from your handler.
Create an SSH Avatar
Subclass txsshadmin.cred_base.SSHBaseAvatar to create an avatar for your ssh service. Assign the protocol factory you created to its protocolFactory attribute. The avatar is where you can define the capabilities of authenticated users. A protocol handler for a service with users with various capabilities may delegate its handlers to its avatar.
Create a Realm
The realm determines what avatar (if any) is returned when the authenticated avatar ID and a list of interfaces is provided to the realm. The resulting avatar should support at least one of the provided interfaces.
For a simple realm that returns only a single type of avatar, you can subclass txsshadmin.cred_base.SSHBaseRealm and set the avatarFactory attribute to an avatar factory. For more sophisticated realms, you can include logic that returns different avatars based on capabilities keyed to the avatar ID.
Create the SSH Service
Subclass txsshadmin.service.SSHServiceBase. Set the realm attribute equal to an instance of your realm.
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