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# -*- coding: binary -*-
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###
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#
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# A reference to some sort of information.  This is typically a URL, but could
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# be any type of referential value that people could use to research a topic.
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#
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###
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class Msf::Module::Reference
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  #
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  # Serialize a reference from a string.
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  #
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  def self.from_s(str)
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    return self.new(str)
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  end
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  #
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  # Initializes a reference from a string.
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  #
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  def initialize(in_str)
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    self.str = in_str
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  end
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  #
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  # Compares references to see if they're equal.
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  #
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  def ==(tgt)
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    return (tgt.to_s == to_s)
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  end
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  #
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  # Returns the reference as a string.
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  #
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  def to_s
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    return self.str
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  end
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  #
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  # Serializes the reference instance from a string.
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  #
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  def from_s(in_str)
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    self.str = in_str
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  end
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  #
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  # The reference string.
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  #
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  attr_reader :str
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protected
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  attr_writer :str # :nodoc:
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end
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###
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#
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# A reference to a website.
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#
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###
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class Msf::Module::SiteReference < Msf::Module::Reference
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  #
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  # Class method that translates a URL into a site reference instance.
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  #
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  def self.from_s(str)
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    instance = self.new
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    if (instance.from_s(str) == false)
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      return nil
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    end
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    return instance
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  end
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  #
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  # Initializes a site reference from an array.  ary[0] is the site and
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  # ary[1] is the site context identifier, such as CVE.
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  #
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  def self.from_a(ary)
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    return nil if (ary.length < 2)
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    self.new(ary[0], ary[1])
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  end
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  #
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  # Initialize the site reference.
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  # If you're updating the references, please also update:
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  # * tools/module_reference.rb
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  # * https://docs.metasploit.com/docs/development/developing-modules/module-metadata/module-reference-identifiers.html
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  #
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  def initialize(in_ctx_id = 'Unknown', in_ctx_val = '')
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    self.ctx_id  = in_ctx_id
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    self.ctx_val = in_ctx_val
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    if in_ctx_id == 'CVE'
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      self.site = "https://nvd.nist.gov/vuln/detail/CVE-#{in_ctx_val}"
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    elsif in_ctx_id == 'CWE'
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      self.site = "https://cwe.mitre.org/data/definitions/#{in_ctx_val}.html"
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    elsif in_ctx_id == 'BID'
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      self.site = "http://www.securityfocus.com/bid/#{in_ctx_val}"
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    elsif in_ctx_id == 'MSB'
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      year = in_ctx_val[2..3]
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      century = year[0] == '9' ? '19' : '20'
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      self.site = "https://docs.microsoft.com/en-us/security-updates/SecurityBulletins/#{century}#{year}/#{in_ctx_val}"
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    elsif in_ctx_id == 'EDB'
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      self.site = "https://www.exploit-db.com/exploits/#{in_ctx_val}"
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    elsif in_ctx_id == 'US-CERT-VU'
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      self.site = "https://www.kb.cert.org/vuls/id/#{in_ctx_val}"
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    elsif in_ctx_id == 'ZDI'
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      self.site = "http://www.zerodayinitiative.com/advisories/ZDI-#{in_ctx_val}"
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    elsif in_ctx_id == 'WPVDB'
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      self.site = "https://wpscan.com/vulnerability/#{in_ctx_val}"
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    elsif in_ctx_id == 'PACKETSTORM'
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      self.site = "https://packetstormsecurity.com/files/#{in_ctx_val}"
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    elsif in_ctx_id == 'URL'
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      self.site = in_ctx_val.to_s
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    elsif in_ctx_id == 'LOGO'
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      self.site = "Logo: #{in_ctx_val}"
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    elsif in_ctx_id == 'SOUNDTRACK'
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      self.site = "Soundtrack: #{in_ctx_val}"
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    else
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      self.site  = in_ctx_id
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      self.site += " (#{in_ctx_val})" if (in_ctx_val)
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    end
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  end
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  #
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  # Returns the absolute site URL.
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  #
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  def to_s
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    return site || ''
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  end
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  #
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  # Serializes a site URL string.
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  #
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  def from_s(str)
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    if (/(http:\/\/|https:\/\/|ftp:\/\/)/.match(str))
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      self.site = str
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      self.ctx_id  = 'URL'
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      self.ctx_val = self.site
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    else
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      return false
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    end
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    return true
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  end
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  #
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  # The site being referenced.
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  #
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  attr_reader :site
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  #
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  # The context identifier of the site, such as CVE.
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  #
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  attr_reader :ctx_id
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  #
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  # The context value of the reference, such as MS02-039
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  #
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  attr_reader :ctx_val
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protected
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  attr_writer :site, :ctx_id, :ctx_val
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end
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