Class: Rex::Proto::Kerberos::Model::ApReq

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

Overview

This class provides a representation of a KRB_AP_REQ definition, containing the Kerberos protocol version number, the message type KRB_AP_REQ, an options field to indicate any options in use, and the ticket and authenticator themselves

Constant Summary

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

AD_IF_RELEVANT, AP_REQ, AS_REP, AS_REQ, AUTHENTICATOR, ERROR_CODES, KDC_OPTION_ALLOW_POST_DATE, KDC_OPTION_ENC_TKT_IN_SKEY, KDC_OPTION_FORWARDABLE, KDC_OPTION_FORWARDED, KDC_OPTION_POST_DATED, KDC_OPTION_PROXIABLE, KDC_OPTION_PROXY, KDC_OPTION_RENEW, KDC_OPTION_RENEWABLE, KDC_OPTION_RENEWABLE_OK, KDC_OPTION_RESERVED, KDC_OPTION_UNUSED_10, KDC_OPTION_UNUSED_11, KDC_OPTION_UNUSED_7, KDC_OPTION_UNUSED_9, KDC_OPTION_VALIDATE, KRB_ERROR, NT_PRINCIPAL, NT_SRV_HST, NT_SRV_INST, NT_SRV_XHST, NT_UID, NT_UNKNOWN, PA_ENC_TIMESTAMP, PA_PAC_REQUEST, PA_PW_SALT, PA_TGS_REQ, TGS_REP, TGS_REQ, TICKET, VERSION

Constants included from Crypto

Crypto::ENC_AS_RESPONSE, Crypto::ENC_KDC_REQUEST_BODY, Crypto::ENC_TGS_RESPONSE, Crypto::RC4_HMAC, Crypto::RSA_MD5

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Element

attr_accessor, attributes, #attributes, decode, #initialize

Methods included from Crypto::RsaMd5

#checksum_rsa_md5

Methods included from Crypto::Rc4Hmac

#decrypt_rc4_hmac, #encrypt_rc4_hmac

Constructor Details

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

Instance Attribute Details

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

client’s choice of a subkey

Returns:



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# File 'lib/rex/proto/kerberos/model/ap_req.rb', line 26

def authenticator
  @authenticator
end

#msg_type ⇒ Fixnum

Returns The type of the protocol message.

Returns:

  • (Fixnum) —

    The type of the protocol message



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# File 'lib/rex/proto/kerberos/model/ap_req.rb', line 16

def msg_type
  @msg_type
end

#options ⇒ Fixnum

Returns request options, affects processing.

Returns:

  • (Fixnum) —

    request options, affects processing



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# File 'lib/rex/proto/kerberos/model/ap_req.rb', line 19

def options
  @options
end

#pvno ⇒ Fixnum

Returns The protocol version number.

Returns:

  • (Fixnum) —

    The protocol version number



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# File 'lib/rex/proto/kerberos/model/ap_req.rb', line 13

def pvno
  @pvno
end

#ticket ⇒ Rex::Proto::Kerberos::Model::Ticket

Returns The ticket authenticating the client to the server.

Returns:



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# File 'lib/rex/proto/kerberos/model/ap_req.rb', line 22

def ticket
  @ticket
end

Instance Method Details

#decode(input) ⇒ Object

Rex::Proto::Kerberos::Model::ApReq decoding isn’t supported

Raises:



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# File 'lib/rex/proto/kerberos/model/ap_req.rb', line 31

def decode(input)
  raise ::NotImplementedError, 'AP-REQ decoding not supported'
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_req.rb', line 38

def encode
  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_options], 2, :CONTEXT_SPECIFIC)
  elems << OpenSSL::ASN1::ASN1Data.new([encode_ticket], 3, :CONTEXT_SPECIFIC)
  elems << OpenSSL::ASN1::ASN1Data.new([encode_authenticator], 4, :CONTEXT_SPECIFIC)
  seq = OpenSSL::ASN1::Sequence.new(elems)

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

  seq_asn1.to_der
end