contrib/add-tor

   1 #!/usr/bin/ruby
   2
   3 # add-tor  -  Add a tor fingerprint line to the approved-routers file
   4 #
   5 # Tor's approved-routers file is expected to be versioned using RCS.
   6 # This script checks for uncommitted changes, does a checkout of the
   7 # file, adds the new fingerprint with a comment stating the server's
   8 # operator, and commits the file to RCS again (using -u so that the
   9 # working copy is not removed.
  10 #
  11 # Operator and fingerprint line are read from stdin.
  12 #
  13 # Before adding a fingerprint line, approved-routers is checked for
  14 # rough syntactical correctness.  This script also checks that the
  15 # nickname and fingerprint to be added do not already exist in the
  16 # binding list.
  17
  18
  19 # Copyright (c) 2006 by Peter Palfrader
  20 #
  21 # Permission is hereby granted, free of charge, to any person obtaining
  22 # a copy of this software and associated documentation files (the
  23 # "Software"), to deal in the Software without restriction, including
  24 # without limitation the rights to use, copy, modify, merge, publish,
  25 # distribute, sublicense, and/or sell copies of the Software, and to
  26 # permit persons to whom the Software is furnished to do so, subject to
  27 # the following conditions:
  28 #
  29 # The above copyright notice and this permission notice shall be
  30 # included in all copies or substantial portions of the Software.
  31 #
  32 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  33 # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  34 # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  35 # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  36 # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  37 # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  38 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  39
  40 BINDING = '/etc/tor/approved-routers'
  41
  42 def mysys(cmd)
  43         unless system(cmd)
  44                 STDERR.puts "ERROR: #{cmd} failed"
  45                 exit 1
  46         end
  47 end
  48
  49 def check_nick(n)
  50         n =~ /^[a-zA-Z0-9]+$/
  51 end
  52
  53 def check_fpr(fpr)
  54         fpr =~ /^([0-9A-F]{4} ){9}[0-9A-F]{4}$/
  55 end
  56
  57 def parse_fprline(fprline)
  58         n = fprline[0 ... fprline.index(' ')]
  59         f = fprline[fprline.index(' ') + 1 .. -1 ]
  60         unless check_nick(n) and check_fpr(f)
  61                 STDERR.puts "Invalid fpr syntax '#{fprline}'"
  62                 exit 1
  63         end
  64         [n, f]
  65 end
  66
  67
  68
  69 unless system("rcsdiff -q -u #{BINDING}")
  70         STDERR.puts "Uncommitted changes in #{BINDING}.  Aborting."
  71         exit 1
  72 end
  73
  74 puts "Checking out #{BINDING}..."
  75 mysys("co -l #{BINDING}")
  76
  77 print "Operator: "
  78 @operator = readline.chop
  79 unless @operator.index('@')
  80         STDERR.puts "ERROR: No @ found"
  81         exit 1
  82 end
  83
  84 print "FPR Line: "
  85 @fprline = readline.chop
  86 (@nickname, @fpr) = parse_fprline(@fprline)
  87
  88 binding = File.new(BINDING,  "r+")
  89 binding.readlines.each do |line|
  90         line.chop!
  91         next if line[0..0] == "#"
  92         (n,f) = parse_fprline(line)
  93         if (n == @nickname)
  94                 STDERR.puts
  95                 STDERR.puts "ERROR: Nickname #{n} already exists in #{BINDING} (fpr: #{f})"
  96                 exit 1
  97         end
  98         if (f == @fpr)
  99                 STDERR.puts
 100                 STDERR.puts "ERROR: Fpr #{f} already exists in #{BINDING} (nickname: #{n})"
 101                 exit 1
 102         end
 103 end
 104
 105 puts
 106 puts '| # ' + @operator
 107 puts '| '   + @fprline
 108 puts
 109
 110 binding.puts '# '+@operator
 111 binding.puts @fprline
 112 binding.close
 113
 114 puts "Committing #{BINDING}..."
 115 mysys("ci -u -m'Add #{@nickname}' #{BINDING}")