#! /usr/bin/python

import mLib as M
import catacomb as C
from sys import argv
from os import environ

_, name, plen, qlen, seed = argv
plen = int(plen)
qlen = int(qlen)

if seed == '!':
  seed = C.rmd160().hash(name).done()
else:
  seed = M.base64_decode(seed)
rng = C.rmd160_mgfrand(seed)

dhi, ff = C.DHInfo.genlimlee(plen, qlen, rng = rng)

kf = C.KeyFile(environ.get('TMPDIR', '/tmp') + 'keyring', C.KOPEN_WRITE)
id = C.ReadBuffer(seed).getu32()
k = kf.newkey(id, 'dh-param')
k.data = C.KeyDataStructured({'p': C.KeyDataMP(dhi.p, 'shared'),
			      'q': C.KeyDataMP(dhi.r, 'shared'),
			      'g': C.KeyDataMP(dhi.g, 'shared')})
k.attr['factor'] = ', '.join([str(f) for f in ff])
k.attr['genseed'] = M.base64_encode(seed)
k.attr['seedalg'] = 'rmd160-mgf'

def words(buf):
  buf = C.ReadBuffer(buf)
  while not buf.endp:
    yield buf.getu32()
h = C.rmd160()
k.fingerprint(h)
fprhex = '-'.join(['%x' % w for w in words(h.done())])

print '# --- %s ---' % name
print '#'
print '# keyid = %x' % id
print '# seed = %s' % M.base64_encode(seed)
print '# fingerprint = %s' % fprhex
print ''
print 'group %s' % name
print '	 p %s' % dhi.p
print '	 q %s' % dhi.r
print '	 g %s' % dhi.g
for f in ff: print '#:factor %s' % f
print