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require 'rasn1'
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module Rex::Proto::Gss
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  # Negotiation token returned by the target to the initiator
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  # https://www.rfc-editor.org/rfc/rfc2478
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  class SpnegoNegTokenTarg < RASN1::Model
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    ACCEPT_COMPLETED = 'accept-completed'
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    ACCEPT_INCOMPLETE = 'accept-incomplete'
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    REJECT = 'reject'
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    REQUEST_MIC = 'request-mic'
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    NEG_RESULTS = { ACCEPT_COMPLETED => 0,
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                    ACCEPT_INCOMPLETE => 1,
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                    REJECT => 2,
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                    REQUEST_MIC => 3}
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    sequence :token, explicit: 1, class: :context, constructed: true,
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              content: [enumerated(:neg_result, enum: NEG_RESULTS, explicit: 0, class: :context, constructed: true, optional: true),
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                        objectid(:supported_mech, explicit: 1, class: :context, constructed: true, optional: true),
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                        octet_string(:response_token, explicit: 2, class: :context, constructed: true, optional: true),
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                        octet_string(:mech_list_mic, explicit: 3, class: :context, constructed: true, optional: true)
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    ]
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    def neg_result
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      self[:neg_result].value
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    end
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    def supported_mech
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      self[:supported_mech].value
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    end
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    def response_token
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      self[:response_token].value
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    end
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    def mech_list_mic
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      self[:mech_list_mic].value
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    end
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  end
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end
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