Class: RubySMB::Dcerpc::Srvsvc::NetShareEnumAll

Inherits:
BinData::Record
  • Object
show all
Defined in:
lib/ruby_smb/dcerpc/srvsvc/net_share_enum_all.rb

Overview

https://msdn.microsoft.com/en-us/library/cc247293.aspx

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#opnum ⇒ Object (readonly)

Returns the value of attribute opnum.



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# File 'lib/ruby_smb/dcerpc/srvsvc/net_share_enum_all.rb', line 8

def opnum
  @opnum
end

Class Method Details

.parse_response(response) ⇒ Object 



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# File 'lib/ruby_smb/dcerpc/srvsvc/net_share_enum_all.rb', line 44

def self.parse_response(response)

  shares = []

  res = response.dup
  win_error = res.slice!(-4, 4).unpack("V")[0]

  if win_error != 0
    raise RuntimeError, "Invalid DCERPC response: win_error = #{win_error}"
  end

  # Remove unused data
  res.slice!(0, 12) # level, CTR header, Reference ID of CTR
  share_count = res.slice!(0, 4).unpack("V")[0]
  res.slice!(0, 4) # Reference ID of CTR1
  share_max_count = res.slice!(0, 4).unpack("V")[0]

  if share_max_count != share_count
    raise RuntimeError, "Invalid DCERPC response: count != count max (#{share_count}/#{share_max_count})"
  end

  # ReferenceID / Type / ReferenceID of Comment
  types = res.slice!(0, share_count * 12).scan(/.{12}/n).map { |a| a[4, 2].unpack("v")[0] }

  share_count.times do |t|
    length, offset, max_length = res.slice!(0, 12).unpack("VVV")
    if offset != 0
      raise RuntimeError, "Invalid DCERPC response: offset != 0 (#{offset})"
    end

    if length != max_length
      raise RuntimeError, "Invalid DCERPC response: length !=max_length (#{length}/#{max_length})"
    end
    name = res.slice!(0, 2 * length).gsub('\x00', '')
    res.slice!(0, 2) if length % 2 == 1 # pad

    comment_length, comment_offset, comment_max_length = res.slice!(0, 12).unpack("VVV")

    if comment_offset != 0
      raise RuntimeError, "Invalid DCERPC response: comment_offset != 0 (#{comment_offset})"
    end

    if comment_length != comment_max_length
      raise RuntimeError, "Invalid DCERPC response: comment_length != comment_max_length (#{comment_length}/#{comment_max_length})"
    end

    comment = res.slice!(0, 2 * comment_length)

    res.slice!(0, 2) if comment_length % 2 == 1 # pad

    name = name.gsub("\x00", "")
    s_type = ['DISK', 'PRINTER', 'DEVICE', 'IPC', 'SPECIAL', 'TEMPORARY'][types[t]].gsub("\x00", "")
    comment = comment.gsub("\x00", "")

    shares << [name, s_type, comment]
  end

  shares
end

Instance Method Details

#initialize_instance ⇒ Object 



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# File 'lib/ruby_smb/dcerpc/srvsvc/net_share_enum_all.rb', line 34

def initialize_instance
  super
  @opnum = NET_SHARE_ENUM_ALL
end

#pad_length ⇒ Object 



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# File 'lib/ruby_smb/dcerpc/srvsvc/net_share_enum_all.rb', line 39

def pad_length
  offset = (server_unc.abs_offset + server_unc.to_binary_s.length) % 4
  (4 - offset) % 4
end