Class: Rex::Proto::Kerberos::Model::KdcRequest

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

Overview

This class provides a representation of a Kerberos KDC-REQ (request) data definition

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

#msg_typeInteger

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/kdc_request.rb', line 15

def msg_type
  @msg_type
end

#pa_dataArray<Rex::Proto::Kerberos::Model::PreAuthData>

be needed before credentials can be issued or decrypted

Returns:


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

def pa_data
  @pa_data
end

#pvnoInteger

Returns The protocol version number.

Returns:

  • (Integer)

    The protocol version number


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

def pvno
  @pvno
end

#req_bodyRex::Proto::Kerberos::Model:::KdcRequestBody

Returns The request body.

Returns:

  • (Rex::Proto::Kerberos::Model:::KdcRequestBody)

    The request body


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

def req_body
  @req_body
end

Instance Method Details

#decode(input) ⇒ self

Decodes the Rex::Proto::Kerberos::Model::KdcRequest 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/kdc_request.rb', line 29

def decode(input)
  case input
  when String
    decode_string(input)
  when OpenSSL::ASN1::ASN1Data
    decode_asn1(input)
  else
    raise ::RuntimeError, 'Failed to decode KdcRequest, invalid input'
  end

  self
end

#encodeString

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

Returns:

  • (String)

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# File 'lib/rex/proto/kerberos/model/kdc_request.rb', line 45

def encode
  pvno_asn1 = OpenSSL::ASN1::ASN1Data.new([encode_pvno], 1, :CONTEXT_SPECIFIC)
  msg_type_asn1 = OpenSSL::ASN1::ASN1Data.new([encode_msg_type], 2, :CONTEXT_SPECIFIC)
  pa_data_asn1 = OpenSSL::ASN1::ASN1Data.new([encode_pa_data], 3, :CONTEXT_SPECIFIC)
  req_body_asn1 = OpenSSL::ASN1::ASN1Data.new([encode_req_body], 4, :CONTEXT_SPECIFIC)
  seq = OpenSSL::ASN1::Sequence.new([pvno_asn1, msg_type_asn1, pa_data_asn1, req_body_asn1])
  seq_asn1 = OpenSSL::ASN1::ASN1Data.new([seq], msg_type, :APPLICATION)
  seq_asn1.to_der
end