Class: Rex::Proto::Http::AuthDigest

Inherits:
Object
  • Object
show all
Defined in:
lib/rex/proto/http/auth_digest.rb

Instance Method Summary collapse

Instance Method Details

#digest(digest_user, digest_password, method, path, parameters, iis = false) ⇒ Object 



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# File 'lib/rex/proto/http/auth_digest.rb', line 13

def digest(digest_user, digest_password, method, path, parameters, iis = false)
  cnonce = make_cnonce
  nonce_count = 1

  qop = parameters['qop']

  if parameters['algorithm'] =~ /(.*?)(-sess)?$/
    algorithm = case ::Regexp.last_match(1)
                when 'MD5' then Digest::MD5
                when 'MD-5' then Digest::MD5
                when 'SHA1' then Digest::SHA1
                when 'SHA-1' then Digest::SHA1
                when 'SHA2' then Digest::SHA2
                when 'SHA-2' then Digest::SHA2
                when 'SHA256' then Digest::SHA256
                when 'SHA-256' then Digest::SHA256
                when 'SHA384' then Digest::SHA384
                when 'SHA-384' then Digest::SHA384
                when 'SHA512' then Digest::SHA512
                when 'SHA-512' then Digest::SHA512
                when 'RMD160' then Digest::RMD160
                else raise "unknown algorithm \"#{::Regexp.last_match(1)}\""
                end
    algstr = parameters['algorithm']
    sess = ::Regexp.last_match(2)
  else
    algorithm = Digest::MD5
    algstr = 'MD5'
    sess = false
  end
  a1 = if sess
         [
           algorithm.hexdigest("#{digest_user}:#{parameters['realm']}:#{digest_password}"),
           parameters['nonce'],
           cnonce
         ].join ':'
       else
         "#{digest_user}:#{parameters['realm']}:#{digest_password}"
       end

  ha1 = algorithm.hexdigest(a1)
  ha2 = algorithm.hexdigest("#{method}:#{path}")

  request_digest = [ha1, parameters['nonce']]
  request_digest.push(('%08x' % nonce_count), cnonce, qop) if qop
  request_digest << ha2
  request_digest = request_digest.join ':'
  # Same order as IE7
  return [
    "Digest username=\"#{digest_user}\"",
    "realm=\"#{parameters['realm']}\"",
    "nonce=\"#{parameters['nonce']}\"",
    "uri=\"#{path}\"",
    "cnonce=\"#{cnonce}\"",
    "nc=#{'%08x' % nonce_count}",
    "algorithm=#{algstr}",
    "response=\"#{algorithm.hexdigest(request_digest)}\"",
    # The spec says the qop value shouldn't be enclosed in quotes, but
    # some versions of IIS require it and Apache accepts it.  Chrome
    # and Firefox both send it without quotes but IE does it this way.
    # Use the non-compliant-but-everybody-does-it to be as compatible
    # as possible by default.  The user can override if they don't like
    # it.
    if iis
      "qop=\"#{qop}\""
    else
      "qop=#{qop}"
    end,
    if parameters.key? 'opaque'
      "opaque=\"#{parameters['opaque']}\""
    end
  ].compact
end

#make_cnonce ⇒ Object 



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# File 'lib/rex/proto/http/auth_digest.rb', line 9

def make_cnonce
  Digest::MD5.hexdigest '%x' % (::Time.now.to_i + rand(65535))
end