Class: HrrRbSsh::Authentication::Method::KeyboardInteractive

Inherits:
HrrRbSsh::Authentication::Method show all
Includes:
Loggable
Defined in:
lib/hrr_rb_ssh/authentication/method/keyboard_interactive.rb,
lib/hrr_rb_ssh/authentication/method/keyboard_interactive/context.rb,
lib/hrr_rb_ssh/authentication/method/keyboard_interactive/info_request.rb,
lib/hrr_rb_ssh/authentication/method/keyboard_interactive/info_response.rb

Defined Under Namespace

Classes: Context, InfoRequest, InfoResponse

Constant Summary collapse

NAME = 
'keyboard-interactive'
PREFERENCE = 
30

Instance Attribute Summary

Attributes included from Loggable

#log_key, #logger

Instance Method Summary collapse

Methods included from Loggable

#log_debug, #log_error, #log_fatal, #log_info, #log_warn

Methods included from SubclassWithPreferenceListable

#[], #inherited, #list_preferred, #list_supported

Constructor Details

#initialize(transport, options, variables, authentication_methods, logger: nil) ⇒ KeyboardInteractive

Returns a new instance of KeyboardInteractive.



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# File 'lib/hrr_rb_ssh/authentication/method/keyboard_interactive.rb', line 15

def initialize transport, options, variables, authentication_methods, logger: nil
  self.logger = logger
  @transport = transport
  @options = options
  @authenticator = options.fetch( 'authentication_keyboard_interactive_authenticator', Authenticator.new{ false } )
  @variables = variables
  @authentication_methods = authentication_methods
end

Instance Method Details

#authenticate(userauth_request_message) ⇒ Object 



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# File 'lib/hrr_rb_ssh/authentication/method/keyboard_interactive.rb', line 24

def authenticate userauth_request_message
  log_info { "authenticate" }
  log_debug { "userauth request: " + userauth_request_message.inspect }
  username = userauth_request_message[:'user name']
  submethods = userauth_request_message[:'submethods']
  context = Context.new(@transport, username, submethods, @variables, @authentication_methods, logger: logger)
  @authenticator.authenticate context
end

#request_authentication(username, service_name) ⇒ Object 



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# File 'lib/hrr_rb_ssh/authentication/method/keyboard_interactive.rb', line 33

def request_authentication username, service_name
  message = {
    :'message number' => Message::SSH_MSG_USERAUTH_REQUEST::VALUE,
    :"user name"      => username,
    :"service name"   => service_name,
    :"method name"    => NAME,
    :"language tag"   => "",
    :'submethods'     => "",
  }
  payload = Message::SSH_MSG_USERAUTH_REQUEST.new(logger: logger).encode message
  @transport.send payload

  payload = @transport.receive
  case payload[0,1].unpack("C")[0]
  when Message::SSH_MSG_USERAUTH_INFO_REQUEST::VALUE
    message = Message::SSH_MSG_USERAUTH_INFO_REQUEST.new(logger: logger).decode payload
    num_responses = @options['client_authentication_keyboard_interactive'].size
    message = {
      :'message number' => Message::SSH_MSG_USERAUTH_INFO_RESPONSE::VALUE,
      :'num-responses'  => num_responses,
    }
    message_responses = @options['client_authentication_keyboard_interactive'].map.with_index{ |response, i|
      {:"response[#{i+1}]" => response}
    }.inject(Hash.new){ |a, b| a.merge(b) }
    message.update(message_responses)
    payload = Message::SSH_MSG_USERAUTH_INFO_RESPONSE.new(logger: logger).encode message
    @transport.send payload
    @transport.receive
  else
    payload
  end
end