Class: Rex::Proto::Kerberos::Model::ApRep

Inherits:
Element
  • Object
show all
Defined in:
lib/rex/proto/kerberos/model/ap_rep.rb

Overview

This class provides a representation of a Kerberos AP-REP (response) data definition

Constant Summary

Constants included from Rex::Proto::Kerberos::Model

AP_REP, AP_REQ, AS_REP, AS_REQ, AUTHENTICATOR, ENC_AP_REP_PART, ENC_KRB_CRED_PART, KRB_CRED, KRB_ERROR, TGS_REP, TGS_REQ, TICKET, VERSION

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Element

attr_accessor, attributes, #attributes, decode, #initialize

Constructor Details

This class inherits a constructor from Rex::Proto::Kerberos::Model::Element

Instance Attribute Details

#enc_part ⇒ Rex::Proto::Kerberos::Model::EncryptedData

Returns The encrypted part of the response.

Returns:



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# File 'lib/rex/proto/kerberos/model/ap_rep.rb', line 18

def enc_part
  @enc_part
end

#msg_type ⇒ Integer

Returns The type of a protocol message.

Returns:

  • (Integer) —

    The type of a protocol message



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# File 'lib/rex/proto/kerberos/model/ap_rep.rb', line 15

def msg_type
  @msg_type
end

#pvno ⇒ Integer

Returns The protocol version number.

Returns:

  • (Integer) —

    The protocol version number



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# File 'lib/rex/proto/kerberos/model/ap_rep.rb', line 12

def pvno
  @pvno
end

Instance Method Details

#decode(input) ⇒ self

Decodes the Rex::Proto::Kerberos::Model::ApRep from an input

Parameters:

  • input (String, OpenSSL::ASN1::ASN1Data) —

    the input to decode from

Returns:

  • (self) —

    if decoding succeeds

Raises:



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# File 'lib/rex/proto/kerberos/model/ap_rep.rb', line 25

def decode(input)
  case input
  when String
    decode_string(input)
  when OpenSSL::ASN1::ASN1Data
    decode_asn1(input)
  else
    raise ::Rex::Proto::Kerberos::Model::Error::KerberosDecodingError, 'Failed to decode ApRep, invalid input'
  end

  self
end

#decrypt_enc_part(key) ⇒ Object 



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# File 'lib/rex/proto/kerberos/model/ap_rep.rb', line 59

def decrypt_enc_part(key)
  data = enc_part.decrypt_asn1(key, Rex::Proto::Kerberos::Crypto::KeyUsage::AP_REP_ENCPART)

  result = Rex::Proto::Kerberos::Model::EncApRepPart::decode(data)
end

#encode ⇒ String

Encodes the Rex::Proto::Kerberos::Model::ApReq into an ASN.1 String

Returns:

  • (String) 


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# File 'lib/rex/proto/kerberos/model/ap_rep.rb', line 41

def encode
  to_asn1.to_der
end

#to_asn1 ⇒ OpenSSL::ASN1::ASN1Data

Returns The ap_req ASN1Data.

Returns:

  • (OpenSSL::ASN1::ASN1Data) —

    The ap_req ASN1Data



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# File 'lib/rex/proto/kerberos/model/ap_rep.rb', line 46

def to_asn1
  elems = []

  elems << OpenSSL::ASN1::ASN1Data.new([encode_pvno], 0, :CONTEXT_SPECIFIC)
  elems << OpenSSL::ASN1::ASN1Data.new([encode_msg_type], 1, :CONTEXT_SPECIFIC)
  elems << OpenSSL::ASN1::ASN1Data.new([encode_enc_part], 2, :CONTEXT_SPECIFIC)

  seq = OpenSSL::ASN1::Sequence.new(elems)

  seq_asn1 = OpenSSL::ASN1::ASN1Data.new([seq], AP_REP, :APPLICATION)
  seq_asn1
end