Class: PacketGen::Plugin::SMB2::Negotiate::Response

Inherits:
Base
  • Object
show all
Defined in:
lib/packetgen/plugin/smb2/negotiate/response.rb

Overview

SMB2 Negotiate response structure 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | StructureSize | SecurityMode | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | DialectRevision | ContextCount | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ServerGUID |

  •                                                           +
    | |
  •                                                           +
    | |
  •                                                           +
    | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| Capabilities | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | MaxTranSize | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | MaxReadSize | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | MaxWriteSize | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | SystemTime |

  •                                                           +
    | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| StartTime |

  •                                                           +
    | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| BufferOffset | BufferLength | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ContextOffset | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Buffer (variable) |

  •                                                           +

| ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Pad (variable) |

  •                                                           +

| ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ContextList (variable) |

  •                                                           +

| ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Author:

  • Sylvain Daubert

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Base

define_smb2_pad_field

Instance Attribute Details

#buffer ⇒ GSSAPI

Returns:



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# File 'lib/packetgen/plugin/smb2/negotiate/response.rb', line 143

define_attr :buffer, GSSAPI, token: :init, optional: ->(h) { h.buffer_offset.positive? }

#buffer_length ⇒ Integer

The length of the #buffer field.

Returns:

  • (Integer) 


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# File 'lib/packetgen/plugin/smb2/negotiate/response.rb', line 136

define_attr :buffer_length, BinStruct::Int16le

#buffer_offset ⇒ Integer

The offset, from the beginning of the SMB2 header of the #buffer.

Returns:

  • (Integer) 


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# File 'lib/packetgen/plugin/smb2/negotiate/response.rb', line 132

define_attr :buffer_offset, BinStruct::Int16le

#cap_dfs ⇒ Boolean

Indicates if Distributed File system (DFS) is supported

Returns:

  • (Boolean) 


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# File 'lib/packetgen/plugin/smb2/negotiate/response.rb', line 104

define_bit_attr :capabilities, endian: :little,
cap_rsv: 25, cap_encryption: 1, cap_dir_leasing: 1,
cap_persistent_handles: 1, cap_multi_channel: 1,
cap_large_mtu: 1, cap_leasing: 1, cap_dfs: 1

#cap_dir_leasing ⇒ Boolean

Indicates if directory leasing is supported

Returns:

  • (Boolean) 


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# File 'lib/packetgen/plugin/smb2/negotiate/response.rb', line 104

define_bit_attr :capabilities, endian: :little,
cap_rsv: 25, cap_encryption: 1, cap_dir_leasing: 1,
cap_persistent_handles: 1, cap_multi_channel: 1,
cap_large_mtu: 1, cap_leasing: 1, cap_dfs: 1

#cap_encryption ⇒ Boolean

Indicates if encryption is supported

Returns:

  • (Boolean) 


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# File 'lib/packetgen/plugin/smb2/negotiate/response.rb', line 104

define_bit_attr :capabilities, endian: :little,
cap_rsv: 25, cap_encryption: 1, cap_dir_leasing: 1,
cap_persistent_handles: 1, cap_multi_channel: 1,
cap_large_mtu: 1, cap_leasing: 1, cap_dfs: 1

#cap_large_mtu ⇒ Boolean

Indicates if multi credit operations are supported

Returns:

  • (Boolean) 


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# File 'lib/packetgen/plugin/smb2/negotiate/response.rb', line 104

define_bit_attr :capabilities, endian: :little,
cap_rsv: 25, cap_encryption: 1, cap_dir_leasing: 1,
cap_persistent_handles: 1, cap_multi_channel: 1,
cap_large_mtu: 1, cap_leasing: 1, cap_dfs: 1

#cap_leasing ⇒ Boolean

Indicates if leasing is supported

Returns:

  • (Boolean) 


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# File 'lib/packetgen/plugin/smb2/negotiate/response.rb', line 104

define_bit_attr :capabilities, endian: :little,
cap_rsv: 25, cap_encryption: 1, cap_dir_leasing: 1,
cap_persistent_handles: 1, cap_multi_channel: 1,
cap_large_mtu: 1, cap_leasing: 1, cap_dfs: 1

#cap_multi_channel ⇒ Boolean

Indicates if multiple channels are supported for a single session

Returns:

  • (Boolean) 


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# File 'lib/packetgen/plugin/smb2/negotiate/response.rb', line 104

define_bit_attr :capabilities, endian: :little,
cap_rsv: 25, cap_encryption: 1, cap_dir_leasing: 1,
cap_persistent_handles: 1, cap_multi_channel: 1,
cap_large_mtu: 1, cap_leasing: 1, cap_dfs: 1

#cap_persistent_handles ⇒ Boolean

Indicates if persisten handles are supported

Returns:

  • (Boolean) 


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# File 'lib/packetgen/plugin/smb2/negotiate/response.rb', line 104

define_bit_attr :capabilities, endian: :little,
cap_rsv: 25, cap_encryption: 1, cap_dir_leasing: 1,
cap_persistent_handles: 1, cap_multi_channel: 1,
cap_large_mtu: 1, cap_leasing: 1, cap_dfs: 1

#capabilities ⇒ Integer

32-bit capabilities field.

Returns:

  • (Integer) 


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# File 'lib/packetgen/plugin/smb2/negotiate/response.rb', line 104

define_bit_attr :capabilities, endian: :little,
cap_rsv: 25, cap_encryption: 1, cap_dir_leasing: 1,
cap_persistent_handles: 1, cap_multi_channel: 1,
cap_large_mtu: 1, cap_leasing: 1, cap_dfs: 1

#context_count ⇒ Integer

Only for SMB3 dialect.

Returns:

  • (Integer) 


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# File 'lib/packetgen/plugin/smb2/negotiate/response.rb', line 76

define_attr :context_count, BinStruct::Int16le

#context_list ⇒ ArrayOfContext

If #dialect has the value 0x0311, then this field must contain an array of Context

Returns:



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# File 'lib/packetgen/plugin/smb2/negotiate/response.rb', line 154

define_attr :context_list, ArrayOfContext, builder: ->(h, t) { t.new(counter: h[:context_count]) }

#context_offset ⇒ Integer

Only for SMB3 dialect.

Returns:

  • (Integer) 


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# File 'lib/packetgen/plugin/smb2/negotiate/response.rb', line 140

define_attr :context_offset, BinStruct::Int32le

#dialect ⇒ Integer

16-bit prefered SMB2 protocol dialect number.

Returns:

  • (Integer) 


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# File 'lib/packetgen/plugin/smb2/negotiate/response.rb', line 72

define_attr :dialect, BinStruct::Int16le

#max_read_size ⇒ Integer

32-bit value indicating the maximum size of a READ request

Returns:

  • (Integer) 


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# File 'lib/packetgen/plugin/smb2/negotiate/response.rb', line 116

define_attr :max_read_size, BinStruct::Int32le

#max_trans_size ⇒ Integer

32-bit value indicating the maximum size of the buffer used for QUERY_INFO, QUERY_DIRECTORY, SET_INFO and CHANGE_NOTIFY operations.

Returns:

  • (Integer) 


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# File 'lib/packetgen/plugin/smb2/negotiate/response.rb', line 112

define_attr :max_trans_size, BinStruct::Int32le

#max_write_size ⇒ Integer

32-bit value indicating the maximum size of a WRITE request

Returns:

  • (Integer) 


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# File 'lib/packetgen/plugin/smb2/negotiate/response.rb', line 120

define_attr :max_write_size, BinStruct::Int32le

#pad ⇒ Object

Optional padding between the end of the #buffer field and the first negotiate context in #context_list so that the first negotiate context is 8-byte aligned



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# File 'lib/packetgen/plugin/smb2/negotiate/response.rb', line 149

define_smb2_pad_field :pad

#security_mode ⇒ Integer

16-bit security mode field.

Returns:

  • (Integer) 


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# File 'lib/packetgen/plugin/smb2/negotiate/response.rb', line 68

define_attr :security_mode, BinStruct::Int16leEnum, enum: Negotiate::Request::SECURITY_MODES

#server_guid ⇒ Object

Returns [].

Returns:

  • []



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# File 'lib/packetgen/plugin/smb2/negotiate/response.rb', line 79

define_attr :server_guid, GUID

#start_time ⇒ SMB::Filetime

Start time of the SMB2 server

Returns:



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# File 'lib/packetgen/plugin/smb2/negotiate/response.rb', line 128

define_attr :start_time, SMB::Filetime

#structure_size ⇒ Integer

16-bit negotiate request structure size. Should be 65.

Returns:

  • (Integer) 


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# File 'lib/packetgen/plugin/smb2/negotiate/response.rb', line 64

define_attr :structure_size, BinStruct::Int16le, default: 65

#system_time ⇒ SMB::Filetime

System time of the SMB2 server

Returns:



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# File 'lib/packetgen/plugin/smb2/negotiate/response.rb', line 124

define_attr :system_time, SMB::Filetime

Class Method Details

.protocol_name ⇒ String

Protocol name

Returns:

  • (String) 


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# File 'lib/packetgen/plugin/smb2/negotiate/response.rb', line 158

def self.protocol_name
  'SMB2::Negotiate::Response'
end

Instance Method Details

#calc_length ⇒ void

This method returns an undefined value.

Calculate and set #context_offset, #buffer_offset, #buffer_length and #pad fields. Also calculate lengths in contexts.



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# File 'lib/packetgen/plugin/smb2/negotiate/response.rb', line 181

def calc_length
  self[:pad].read(SMB2::MAX_PADDING)
  calc_buffer_fields
  calc_context_fields
end

#inspect ⇒ String

Returns:

  • (String) 


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# File 'lib/packetgen/plugin/smb2/negotiate/response.rb', line 163

def inspect
  super do |attr|
    next unless attr == :capabilities

    value = bits_on(attr).select { |b| respond_to?("#{b}?") && send("#{b}?") }
                         .map(&:to_s)
                         .join(',')
                         .gsub!('cap_', '')
    value = '%-16s (0x%08x)' % [value, self[attr].to_i]
    str = PacketGen::Inspect.shift_level
    str << (PacketGen::Inspect::FMT_ATTR % [self[attr].class.to_s.sub(/.*::/, ''), attr, value])
  end
end