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Add support for KRB_AP_REQ

bug/bundler_fix
jvazquez-r7 2014-12-16 18:39:42 -06:00
parent 0f55a98450
commit 2649d482fe
4 changed files with 519 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
lib/rex/proto/kerberos/model.rb
View File

@ -15,6 +15,7 @@ module Rex
KRB_ERROR = 30
TICKET = 1
AUTHENTICATOR = 2
AP_REQ = 14
# Encryption Message Id's
ENC_KDC_REQUEST_BODY = 10
@ -74,12 +75,13 @@ require 'rex/proto/kerberos/model/checksum'
require 'rex/proto/kerberos/model/pre_auth_pac_request'
require 'rex/proto/kerberos/model/pre_auth_enc_time_stamp'
require 'rex/proto/kerberos/model/pre_auth_data'
require 'rex/proto/kerberos/model/kdc_request_body'
require 'rex/proto/kerberos/model/kdc_request'
require 'rex/proto/kerberos/model/ap_req'
require 'rex/proto/kerberos/model/krb_error'
require 'rex/proto/kerberos/model/encryption_key'
require 'rex/proto/kerberos/model/authenticator'
require 'rex/proto/kerberos/model/ticket'
require 'rex/proto/kerberos/model/last_request'
require 'rex/proto/kerberos/model/kdc_request_body'
require 'rex/proto/kerberos/model/kdc_request'
require 'rex/proto/kerberos/model/enc_kdc_response'
require 'rex/proto/kerberos/model/kdc_response'

89
lib/rex/proto/kerberos/model/ap_req.rb Normal file
View File

@ -0,0 +1,89 @@
# -*- coding: binary -*-
module Rex
module Proto
module Kerberos
module Model
class ApReq < 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 options
# @return [Fixnum] request options, affects processing
attr_accessor :options
# @!attribute ticket
# @return [Rex::Proto::Kerberos::Model::Ticket] The ticket authenticating the client to the server
attr_accessor :ticket
# @!attribute authenticator
# @return [Rex::Proto::Kerberos::Model::EncryptedData] This contains the authenticator, which includes the
# client's choice of a subkey
attr_accessor :authenticator
def decode(input)
raise ::RuntimeError, 'AP-REQ decoding not supported'
end
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
private
# Encodes the pvno field
#
# @return [OpenSSL::ASN1::Integer]
def encode_pvno
bn = OpenSSL::BN.new(pvno)
int = OpenSSL::ASN1::Integer(bn)
int
end
# Encodes the msg_type field
#
# @return [OpenSSL::ASN1::Integer]
def encode_msg_type
bn = OpenSSL::BN.new(msg_type)
int = OpenSSL::ASN1::Integer(bn)
int
end
# Encodes the options field
#
# @return [OpenSSL::ASN1::BitString]
def encode_options
OpenSSL::ASN1::BitString.new([options].pack('N'))
end
# Encodes the ticket field
#
# @return [String]
def encode_ticket
ticket.encode
end
# Encodes the authenticator field
#
# @return [String]
def encode_authenticator
authenticator.encode
end
end
end
end
end
end

2
lib/rex/proto/kerberos/model/kdc_request.rb
View File

@ -52,7 +52,7 @@ module Rex
private
# Encodes the etype field
# Encodes the pvno field
#
# @return [OpenSSL::ASN1::Integer]
def encode_pvno

425
spec/lib/rex/proto/kerberos/model/ap_req_spec.rb Normal file
View File

@ -0,0 +1,425 @@
# -*- coding:binary -*-
require 'spec_helper'
require 'rex/proto/kerberos'
describe Rex::Proto::Kerberos::Model::ApReq do
subject(:ap_req) do
described_class.new
end
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=end
let(:sample) do
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end
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@tagging=nil,
@value=
"\x81O\x84\xF4!\x93\xE5J\xCC%\x89S\xB3\xEEG\xF13\xDD\x15\xDCf\x05\x90\xE7g\x90\x1D\xBE\x03\xAAF\x02\xD0&M\e\xBB\x1F\t\xD4\xDCE\xBB\xA0|\xD0\xF2C\x9F\xAByL\x8F6\x9E\fXa\xC7\xAD`\xB2D1\xFE\x89@%\xFB\x8Bqi\"\x87\xABnQ\x8E:\xEDd\x16:\x7FM\xB6\xA1\xC8i\xD0\x12_\x01\xD8!8)\xE2\x97cZM\xBF\xC9\xD7\xE9\xC4\a(\x89\xDD\xC1a\xBA\xCC\x12r(\ep=\x1F\xAEP\xD5\x88[\xCA\x00U\xD8\xE9\xDD\x1C\x91~e\x99M\x97l\xB8\xC5\x89\xE1\xAFL\xE4\xB6:y\\\xCE\xF4\xA93y_i\xB9\x16\xBA\x12\x03)\xB1\x80\x89!\x1A\x93\xCD\xE7:\xBA\xCAW\x94G:i\x1A\x1A\x9D\x1D*\x1D6\x82\xFE">]>]>]>]>]>
=end
let(:ticket_der) do
"\x61\x82\x01\x0c\x30\x82\x01\x08\xa0\x03\x02\x01\x05\xa1\x0c\x1b" +
"\x0a\x44\x45\x4d\x4f\x2e\x4c\x4f\x43\x41\x4c\xa2\x1f\x30\x1d\xa0" +
"\x03\x02\x01\x01\xa1\x16\x30\x14\x1b\x06\x6b\x72\x62\x74\x67\x74" +
"\x1b\x0a\x44\x45\x4d\x4f\x2e\x4c\x4f\x43\x41\x4c\xa3\x81\xd1\x30" +
"\x81\xce\xa0\x03\x02\x01\x17\xa1\x03\x02\x01\x02\xa2\x81\xc1\x04" +
"\x81\xbe\x81\x4f\x84\xf4\x21\x93\xe5\x4a\xcc\x25\x89\x53\xb3\xee" +
"\x47\xf1\x33\xdd\x15\xdc\x66\x05\x90\xe7\x67\x90\x1d\xbe\x03\xaa" +
"\x46\x02\xd0\x26\x4d\x1b\xbb\x1f\x09\xd4\xdc\x45\xbb\xa0\x7c\xd0" +
"\xf2\x43\x9f\xab\x79\x4c\x8f\x36\x9e\x0c\x58\x61\xc7\xad\x60\xb2" +
"\x44\x31\xfe\x89\x40\x25\xfb\x8b\x71\x69\x22\x87\xab\x6e\x51\x8e" +
"\x3a\xed\x64\x16\x3a\x7f\x4d\xb6\xa1\xc8\x69\xd0\x12\x5f\x01\xd8" +
"\x21\x38\x29\xe2\x97\x63\x5a\x4d\xbf\xc9\xd7\xe9\xc4\x07\x28\x89" +
"\xdd\xc1\x61\xba\xcc\x12\x72\x28\x1b\x70\x3d\x1f\xae\x50\xd5\x88" +
"\x5b\xca\x00\x55\xd8\xe9\xdd\x1c\x91\x7e\x65\x99\x4d\x97\x6c\xb8" +
"\xc5\x89\xe1\xaf\x4c\xe4\xb6\x3a\x79\x5c\xce\xf4\xa9\x33\x79\x5f" +
"\x69\xb9\x16\xba\x12\x03\x29\xb1\x80\x89\x21\x1a\x93\xcd\xe7\x3a" +
"\xba\xca\x57\x94\x47\x3a\x69\x1a\x1a\x9d\x1d\x2a\x1d\x36\x82\xfe"
end
let(:cipher) do
"\x2b\xea\x95\x7c\x26\x13\x06\x25\x21\x8d\xf7\xcd\x0f\x5b\xac\xc8" +
"\x4f\x35\xdb\xad\x13\xc9\xfb\xf7\x0f\x0a\x20\xcd\x7c\xb7\xc0\xd1" +
"\x8c\xb6\x8d\x0f\x81\x88\xce\xc2\xf1\xcb\xe3\xc1\x02\x3d\x09\x7e" +
"\x4d\xb8\x3f\x0e\x8b\x28\x78\x90\x77\x68\x81\xe3\xc4\x88\x7a\x84" +
"\xe8\x06\x82\x9d\xb9\x35\xba\xc1\x20\x8c\x7a\x93\xfe\xd1\x16\xe5" +
"\xc5\x34\x7e\x49\xc5\x9b\x80\x5a\x52\x37\xce\x56\x4f\x9d\x47\x38" +
"\xe9\x72\xb2\x37\x01\x0f\xdf\x90\x8f\x14\xca\xce\x94\x10\xd9\x0e" +
"\x86\x08\xe9\xa3\x3d\x16\x6a\x8a\x51\x00\x6a\x30\x7a\x3d\x4e\x65" +
"\x6e\x82\xa1\xe6\x59\xd4\xbb\x95\x5c\xbc\xc8\x36\xe1\x95\xca\x7e" +
"\x41\x3c\x66\xc4\xdc\x41"
end
describe "#encode" do
it "encodes Rex::Proto::Kerberos::Model::ApReq correctly" do
ticket = Rex::Proto::Kerberos::Model::Ticket.decode(ticket_der)
authenticator = Rex::Proto::Kerberos::Model::EncryptedData.new(
etype: 23,
cipher: cipher
)
ap_req.pvno = 5
ap_req.msg_type = 14
ap_req.options = 0
ap_req.ticket = ticket
ap_req.authenticator = authenticator
expect(ap_req.encode).to eq(sample)
end
end
end