89 lines
2.7 KiB
Ruby
89 lines
2.7 KiB
Ruby
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# -*- coding: binary -*-
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module Rex
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module Proto
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module Kerberos
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module Model
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class ApReq < Element
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# @!attribute pvno
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# @return [Fixnum] The protocol version number
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attr_accessor :pvno
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# @!attribute msg_type
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# @return [Fixnum] The type of a protocol message
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attr_accessor :msg_type
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# @!attribute options
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# @return [Fixnum] request options, affects processing
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attr_accessor :options
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# @!attribute ticket
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# @return [Rex::Proto::Kerberos::Model::Ticket] The ticket authenticating the client to the server
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attr_accessor :ticket
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# @!attribute authenticator
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# @return [Rex::Proto::Kerberos::Model::EncryptedData] This contains the authenticator, which includes the
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# client's choice of a subkey
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attr_accessor :authenticator
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def decode(input)
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raise ::RuntimeError, 'AP-REQ decoding not supported'
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end
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def encode
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elems = []
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elems << OpenSSL::ASN1::ASN1Data.new([encode_pvno], 0, :CONTEXT_SPECIFIC)
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elems << OpenSSL::ASN1::ASN1Data.new([encode_msg_type], 1, :CONTEXT_SPECIFIC)
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elems << OpenSSL::ASN1::ASN1Data.new([encode_options], 2, :CONTEXT_SPECIFIC)
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elems << OpenSSL::ASN1::ASN1Data.new([encode_ticket], 3, :CONTEXT_SPECIFIC)
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elems << OpenSSL::ASN1::ASN1Data.new([encode_authenticator], 4, :CONTEXT_SPECIFIC)
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seq = OpenSSL::ASN1::Sequence.new(elems)
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seq_asn1 = OpenSSL::ASN1::ASN1Data.new([seq], AP_REQ, :APPLICATION)
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seq_asn1.to_der
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end
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private
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# Encodes the pvno field
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#
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# @return [OpenSSL::ASN1::Integer]
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def encode_pvno
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bn = OpenSSL::BN.new(pvno)
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int = OpenSSL::ASN1::Integer(bn)
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int
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end
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# Encodes the msg_type field
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#
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# @return [OpenSSL::ASN1::Integer]
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def encode_msg_type
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bn = OpenSSL::BN.new(msg_type)
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int = OpenSSL::ASN1::Integer(bn)
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int
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end
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# Encodes the options field
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#
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# @return [OpenSSL::ASN1::BitString]
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def encode_options
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OpenSSL::ASN1::BitString.new([options].pack('N'))
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end
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# Encodes the ticket field
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#
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# @return [String]
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def encode_ticket
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ticket.encode
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end
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# Encodes the authenticator field
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#
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# @return [String]
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def encode_authenticator
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authenticator.encode
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end
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end
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end
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end
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end
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end
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