Class: Rex::Parser::NmapXMLStreamParser

Inherits:
Object
  • Object
show all
Defined in:
lib/rex/parser/nmap_xml.rb

Overview

Stream parser for nmap -oX xml output

Yields a hash representing each host found in the xml stream. Each host will look something like the following: { “status” => “up”, “addrs” => { “ipv4” => “192.168.0.1”, “mac” => “00:0d:87:a1:df:72” }, “ports” => [ { “portid” => “22”, “state” => “closed”, … }, { “portid” => “80”, “state” => “open”, … }, … ] }

Usage:

parser = NmapXMLStreamParser.new { |host|
  # do stuff with the host
}
REXML::Document.parse_stream(File.new(nmap_xml), parser)

– or –

parser = NmapXMLStreamParser.new
parser.on_found_host = Proc.new { |host|
  # do stuff with the host
}
REXML::Document.parse_stream(File.new(nmap_xml), parser)

This parser does not maintain state as well as a tree parser, so malformed xml will trip it up. Nmap shouldn't ever output malformed xml, so it's not a big deal.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(&block) ⇒ NmapXMLStreamParser

Create a new stream parser for NMAP XML output

If given a block, it will be stored in on_found_host, otherwise you need to set it explicitly, e.g.:

parser = NmapXMLStreamParser.new
parser.on_found_host = Proc.new { |host|
  # do stuff with the host
}
REXML::Document.parse_stream(File.new(nmap_xml), parser)

57
58
59
60
# File 'lib/rex/parser/nmap_xml.rb', line 57

def initialize(&block)
  reset_state
  on_found_host = block if block
end

Instance Attribute Details

#on_found_hostObject

Callback for processing each found host


44
45
46
# File 'lib/rex/parser/nmap_xml.rb', line 44

def on_found_host
  @on_found_host
end

Instance Method Details

#attlistObject

:nodoc:


160
161
# File 'lib/rex/parser/nmap_xml.rb', line 160

def attlist # :nodoc:
end

#cdataObject

:nodoc:


154
155
# File 'lib/rex/parser/nmap_xml.rb', line 154

def cdata # :nodoc:
end

#comment(str) ⇒ Object

:nodoc:


156
157
# File 'lib/rex/parser/nmap_xml.rb', line 156

def comment(str) # :nodoc:
end

#instruction(name, instruction) ⇒ Object

:nodoc:


158
159
# File 'lib/rex/parser/nmap_xml.rb', line 158

def instruction(name, instruction) # :nodoc:
end

#reset_stateObject


62
63
64
65
# File 'lib/rex/parser/nmap_xml.rb', line 62

def reset_state
  @host = { "status" => nil, "addrs" => {}, "ports" => [], "scripts" => {} }
  @state = nil
end

#tag_end(name) ⇒ Object


139
140
141
142
143
144
145
146
147
# File 'lib/rex/parser/nmap_xml.rb', line 139

def tag_end(name)
  case name
  when "port"
    @state = nil
  when "host"
    on_found_host.call(@host) if on_found_host
    reset_state
  end
end

#tag_start(name, attributes) ⇒ Object


67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
# File 'lib/rex/parser/nmap_xml.rb', line 67

def tag_start(name, attributes)
  begin
    case name
    when "address"
      @host["addrs"][attributes["addrtype"]] = attributes["addr"]
      if (attributes["addrtype"] =~ /ipv[46]/)
        @host["addr"] = attributes["addr"]
      end
    when "osclass"
      # If there is more than one, take the highest accuracy.  In case of
      # a tie, this will have the effect of taking the last one in the
      # list.  Last is really no better than first but nmap appears to
      # put OSes in chronological order, at least for Windows.
      # Accordingly, this will report XP instead of 2000, 7 instead of
      # Vista, etc, when each has the same accuracy.
      if (@host["os_accuracy"].to_i <= attributes["accuracy"].to_i)
        @host["os_vendor"]   = attributes["vendor"]
        @host["os_family"]   = attributes["osfamily"]
        @host["os_version"]  = attributes["osgen"]
        @host["os_accuracy"] = attributes["accuracy"]
      end
    when "osmatch"
      if(attributes["accuracy"].to_i == 100)
        @host["os_match"] = attributes["name"]
      end
    when "uptime"
      @host["last_boot"]   = attributes["lastboot"]
    when "hostname"
      if(attributes["type"] == "PTR")
        @host["reverse_dns"] = attributes["name"]
      end
    when "status"
      # <status> refers to the liveness of the host; values are "up" or "down"
      @host["status"] = attributes["state"]
      @host["status_reason"] = attributes["reason"]
    when "port"
      @host["ports"].push(attributes)
    when "state"
      # <state> refers to the state of a port; values are "open", "closed", or "filtered"
      @host["ports"].last["state"] = attributes["state"]
    when "service"
      # Store any service and script info with the associated port.  There shouldn't
      # be any collisions on attribute names here, so just merge them.
      @host["ports"].last.merge!(attributes)
    when "script"
      # Associate scripts under a port tag with the appropriate port.
      # Other scripts from <hostscript> tags can only be associated with
      # the host and scripts from <postscript> tags don't really belong
      # to anything, so ignore them
      if @state == :in_port_tag
        @host["ports"].last["scripts"] ||= {}
        @host["ports"].last["scripts"][attributes["id"]] = attributes["output"]
      elsif @host
        @host["scripts"] ||= {}
        @host["scripts"][attributes["id"]] = attributes["output"]
      else
        # post scripts are used for things like comparing all the found
        # ssh keys to see if multiple hosts have the same key
        # fingerprint.  Ignore them.
      end
    when "trace"
      @host["trace"] = {"port" => attributes["port"], "proto" => attributes["proto"], "hops" => [] }
    when "hop"
      if @host["trace"]
        @host["trace"]["hops"].push(attributes)
      end
    end
  rescue NoMethodError => err
    raise err unless err.message =~ /NilClass/
  end
end

#text(str) ⇒ Object

We don't need these methods, but they're necessary to keep REXML happy


150
151
# File 'lib/rex/parser/nmap_xml.rb', line 150

def text(str) # :nodoc:
end

#xmldecl(version, encoding, standalone) ⇒ Object

:nodoc:


152
153
# File 'lib/rex/parser/nmap_xml.rb', line 152

def xmldecl(version, encoding, standalone) # :nodoc:
end