141 lines
4.8 KiB
Ruby
141 lines
4.8 KiB
Ruby
# -*- coding: binary -*-
|
|
|
|
module Rex
|
|
module Proto
|
|
module Kerberos
|
|
module Model
|
|
# This class provides a representation of a Kerberos KDC-REQ (response) data
|
|
# definition
|
|
class KdcResponse < Element
|
|
# @!attribute pvno
|
|
# @return [Fixnum] The protocol version number
|
|
attr_accessor :pvno
|
|
# @!attribute msg_type
|
|
# @return [Fixnum] The type of a protocol message
|
|
attr_accessor :msg_type
|
|
# @!attribute crealm
|
|
# @return [String] The realm part of the client's principal identifier
|
|
attr_accessor :crealm
|
|
# @!attribute cname
|
|
# @return [Rex::Proto::Kerberos::Model::PrincipalName] The name part of the client's principal identifier
|
|
attr_accessor :cname
|
|
# @!attribute ticket
|
|
# @return [Rex::Proto::Kerberos::Model::Ticket] The issued ticket
|
|
attr_accessor :ticket
|
|
# @!attribute enc_part
|
|
# @return [Rex::Proto::Kerberos::Model::EncryptedData] The encrypted part of the response
|
|
attr_accessor :enc_part
|
|
|
|
# Decodes the Rex::Proto::Kerberos::Model::KdcResponse from an input
|
|
#
|
|
# @param input [String, OpenSSL::ASN1::ASN1Data] the input to decode from
|
|
# @return [self] if decoding succeeds
|
|
# @raise [RuntimeError] if decoding doesn't succeed
|
|
def decode(input)
|
|
case input
|
|
when String
|
|
decode_string(input)
|
|
when OpenSSL::ASN1::ASN1Data
|
|
decode_asn1(input)
|
|
else
|
|
raise ::RuntimeError, 'Failed to decode KdcResponse, invalid input'
|
|
end
|
|
|
|
self
|
|
end
|
|
|
|
# Rex::Proto::Kerberos::Model::KdcResponse encoding isn't supported
|
|
#
|
|
# @raise [NotImplementedError]
|
|
def encode
|
|
raise ::NotImplementedError, 'KdcResponse encoding not supported'
|
|
end
|
|
|
|
private
|
|
|
|
# Decodes a Rex::Proto::Kerberos::Model::KdcResponse from an String
|
|
#
|
|
# @param input [String] the input to decode from
|
|
def decode_string(input)
|
|
asn1 = OpenSSL::ASN1.decode(input)
|
|
|
|
decode_asn1(asn1)
|
|
end
|
|
|
|
# Decodes a Rex::Proto::Kerberos::Model::KdcResponse
|
|
#
|
|
# @param input [OpenSSL::ASN1::ASN1Data] the input to decode from
|
|
# @raise [RuntimeError] if decoding doesn't succeed
|
|
def decode_asn1(input)
|
|
input.value[0].value.each do |val|
|
|
case val.tag
|
|
when 0
|
|
self.pvno = decode_pvno(val)
|
|
when 1
|
|
self.msg_type = decode_msg_type(val)
|
|
when 3
|
|
self.crealm = decode_crealm(val)
|
|
when 4
|
|
self.cname = decode_cname(val)
|
|
when 5
|
|
self.ticket = decode_ticket(val)
|
|
when 6
|
|
self.enc_part = decode_enc_part(val)
|
|
else
|
|
raise ::RuntimeError, 'Failed to decode KDC-RESPONSE SEQUENCE'
|
|
end
|
|
end
|
|
end
|
|
|
|
# Decodes the pvno from an OpenSSL::ASN1::ASN1Data
|
|
#
|
|
# @param input [OpenSSL::ASN1::ASN1Data] the input to decode from
|
|
# @return [Fixnum]
|
|
def decode_pvno(input)
|
|
input.value[0].value.to_i
|
|
end
|
|
|
|
# Decodes the msg_type from an OpenSSL::ASN1::ASN1Data
|
|
#
|
|
# @param input [OpenSSL::ASN1::ASN1Data] the input to decode from
|
|
# @return [Fixnum]
|
|
def decode_msg_type(input)
|
|
input.value[0].value.to_i
|
|
end
|
|
|
|
# Decodes the crealm field
|
|
#
|
|
# @param input [OpenSSL::ASN1::ASN1Data] the input to decode from
|
|
# @return [String]
|
|
def decode_crealm(input)
|
|
input.value[0].value
|
|
end
|
|
|
|
# Decodes the cname field
|
|
#
|
|
# @param input [OpenSSL::ASN1::ASN1Data] the input to decode from
|
|
# @return [Rex::Proto::Kerberos::Type::PrincipalName]
|
|
def decode_cname(input)
|
|
Rex::Proto::Kerberos::Model::PrincipalName.decode(input.value[0])
|
|
end
|
|
|
|
# Decodes the ticket field
|
|
#
|
|
# @param input [OpenSSL::ASN1::ASN1Data] the input to decode from
|
|
# @return [Rex::Proto::Kerberos::Type::Ticket]
|
|
def decode_ticket(input)
|
|
Rex::Proto::Kerberos::Model::Ticket.decode(input.value[0])
|
|
end
|
|
|
|
# Decodes the enc_part
|
|
#
|
|
# @param input [OpenSSL::ASN1::ASN1Data] the input to decode from
|
|
# @return [Rex::Proto::Kerberos::Model::EncryptedData]
|
|
def decode_enc_part(input)
|
|
Rex::Proto::Kerberos::Model::EncryptedData.decode(input.value[0])
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end |