Class: SASL::GssApi

Inherits:
Mechanism show all
Defined in:
lib/sasl/gssapi.rb

Instance Attribute Summary

Attributes inherited from Mechanism

#mechanism, #preferences

Instance Method Summary collapse

Methods inherited from Mechanism

#failure?, #success?

Constructor Details

#initialize(*args) ⇒ GssApi

Returns a new instance of GssApi.

Raises:

  • (LoadError) 


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# File 'lib/sasl/gssapi.rb', line 17

def initialize(*args)
    raise LoadError.new("You need gssapi gem in order to use this class") if not HasGSSAPI
    super(*args)
    preferences.config[:gss_opts] = {} if not preferences.config.include? :gss_opts    
    preferences.config[:secure_layer] = false if preferences.config[:secure_layer]==nil
end

Instance Method Details

#receive(message_name, content) ⇒ Object 



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# File 'lib/sasl/gssapi.rb', line 32

def receive(message_name, content)
  case message_name
  when 'challenge'
    case @state
    when :authneg
        if @cli.init_context(content, preferences.gss_opts)
            if false #http
                @state = :waiting_result
            else
                @state = :ssfcap
            end
        else
            @state = :failure
        end
        response = nil  
    when :ssfcap
        ssf = @cli.unwrap_message(content)
        if not ssf.size == 4
            raise "token too short or long (#{ssf.size}). Should be 4."
        end

        if not preferences.secure_layer 
            # No security wanted
            response = @cli.wrap_message(0)
        else
            response = @cli.wrap_message(ssf)
        end
        @state = :waiting_result
    else
        raise "Invalid state #{@state}. Did you called start method?"
    end
    result=['response', response]
  when 'success'
     result=super
     if preferences.secure_layer 
        securelayer_wrapper = proc {|io| SASL::GssSecureLayer.new(io,@cli) }
        result=['securelayer_wrapper', securelayer_wrapper]
     end
  else
    result=super
  end
  result
end

#start ⇒ Object 



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# File 'lib/sasl/gssapi.rb', line 24

def start
    @state = :authneg
    (@service,@host)=preferences.digest_uri.split("/")
    @cli = GSSAPI::Simple.new(@host, @service)
    tok = @cli.init_context(nil, preferences.gss_opts)
    ['auth', tok ]
end