git.distorted.org.uk Git - u/mdw/catacomb/blob - utils/genpgroup

   1 #! /usr/bin/python
   2
   3 import mLib as M
   4 import catacomb as C
   5 from sys import argv
   6 from os import environ
   7
   8 _, name, plen, qlen, seed = argv
   9 plen = int(plen)
  10 qlen = int(qlen)
  11
  12 if seed == '!':
  13   seed = C.rmd160().hash(name).done()
  14 else:
  15   seed = M.base64_decode(seed)
  16 rng = C.rmd160_mgfrand(seed)
  17
  18 dhi, ff = C.DHInfo.genlimlee(plen, qlen, rng = rng)
  19
  20 kf = C.KeyFile(environ.get('TMPDIR', '/tmp') + 'keyring', C.KOPEN_WRITE)
  21 id = C.ReadBuffer(seed).getu32()
  22 k = kf.newkey(id, 'dh-param')
  23 k.data = C.KeyDataStructured({'p': C.KeyDataMP(dhi.p, 'shared'),
  24                               'q': C.KeyDataMP(dhi.r, 'shared'),
  25                               'g': C.KeyDataMP(dhi.g, 'shared')})
  26 k.attr['factor'] = ', '.join([str(f) for f in ff])
  27 k.attr['genseed'] = M.base64_encode(seed)
  28 k.attr['seedalg'] = 'rmd160-mgf'
  29
  30 def words(buf):
  31   buf = C.ReadBuffer(buf)
  32   while not buf.endp:
  33     yield buf.getu32()
  34 h = C.rmd160()
  35 k.fingerprint(h)
  36 fprhex = '-'.join(['%x' % w for w in words(h.done())])
  37
  38 print '# --- %s ---' % name
  39 print '#'
  40 print '# keyid = %x' % id
  41 print '# seed = %s' % M.base64_encode(seed)
  42 print '# fingerprint = %s' % fprhex
  43 print ''
  44 print 'group %s' % name
  45 print '  p %s' % dhi.p
  46 print '  q %s' % dhi.r
  47 print '  g %s' % dhi.g
  48 for f in ff: print '#:factor %s' % f
  49 print