mdw@git.distorted.org.uk Git - catacomb-python/blob - t/t-rand.py

   1 ### -*-python-*-
   2 ###
   3 ### Testing random-generator functionality
   4 ###
   5 ### (c) 2019 Straylight/Edgeware
   6 ###
   7
   8 ###----- Licensing notice ---------------------------------------------------
   9 ###
  10 ### This file is part of the Python interface to Catacomb.
  11 ###
  12 ### Catacomb/Python is free software: you can redistribute it and/or
  13 ### modify it under the terms of the GNU General Public License as
  14 ### published by the Free Software Foundation; either version 2 of the
  15 ### License, or (at your option) any later version.
  16 ###
  17 ### Catacomb/Python is distributed in the hope that it will be useful, but
  18 ### WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20 ### General Public License for more details.
  21 ###
  22 ### You should have received a copy of the GNU General Public License
  23 ### along with Catacomb/Python.  If not, write to the Free Software
  24 ### Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  25 ### USA.
  26
  27 ###--------------------------------------------------------------------------
  28 ### Imported modules.
  29
  30 import catacomb as C
  31 import unittest as U
  32 import testutils as T
  33
  34 ###--------------------------------------------------------------------------
  35 class TestRandomGenerator (U.TestCase):
  36
  37   def check_rand(me, rng):
  38
  39     for i in T.range(50):
  40       x = rng.byte()
  41       me.assertEqual(type(x), int)
  42       me.assertTrue(0 <= x < 256)
  43
  44     x = rng.word()
  45     me.assertTrue(0 <= x <= 0xffffffff)
  46
  47     for i in T.range(50):
  48       x = rng.range(10)
  49       me.assertEqual(type(x), int)
  50       me.assertTrue(0 <= x < 10)
  51     x = rng.range(T.MAXFIXNUM + 1)
  52     me.assertEqual(type(x), C.MP)
  53
  54     for i in T.range(50):
  55       x = rng.mp(123, 7)
  56       me.assertEqual(type(x), C.MP)
  57       me.assertEqual(x.nbits, 123)
  58       me.assertEqual(x&7, 7)
  59     me.assertRaises((OverflowError, ValueError), rng.mp, 128, -1)
  60     me.assertRaises((OverflowError, ValueError), rng.mp, 128, C.MPW_MAX + 1)
  61
  62     x = rng.block(17)
  63     me.assertEqual(type(x), C.ByteString)
  64     me.assertEqual(len(x), 17)
  65
  66   def test_lcrand(me):
  67     rng = C.LCRand(0)
  68     me.assertFalse(rng.cryptop)
  69     w0 = rng.word()
  70     rng.seedint(0)
  71     me.assertEqual(rng.word(), w0)
  72
  73   def test_firand(me):
  74     rng = C.FibRand(0)
  75     me.assertFalse(rng.cryptop)
  76     w0 = rng.word()
  77     rng.seedint(0)
  78     me.assertEqual(rng.word(), w0)
  79
  80   def test_truerand(me):
  81     rng = C.TrueRand()
  82     me.assertTrue(rng.cryptop)
  83     me.check_rand(rng)
  84     rng.key(T.span(23))
  85     rng.seed(256)
  86     me.assertRaises(ValueError, rng.seed, C.RAND_IBITS + 1)
  87     rng.seedint(-314)
  88     rng.seedword(0x12345678)
  89     rng.seedrand(T.detrand("seed-truerand"))
  90     rng.seedblock(T.span(123))
  91     rng.add(T.span(123), 978)
  92     rng.gate()
  93     rng.stretch()
  94     rng.timer()
  95     me.check_rand(rng)
  96
  97   def test_cryptorand(me):
  98     for r, kw in [("rijndael-counter", {}),
  99                   ("rc4", {}),
 100                   ("xchacha20", { "nonce": T.span(24) }),
 101                   ("seal", { "i": 12345678 }),
 102                   ("shake128", { "func": T.bin("TEST"),
 103                                  "perso": T.bin("Catacomb/Python test") }),
 104                   ("kmac256", { "perso": T.bin("Catacomb/Python test") })]:
 105       rcls = C.gccrands[r]
 106       rng = rcls(T.span(rcls.keysz.default), **kw)
 107       me.assertTrue(rng.cryptop)
 108
 109   def test_sslrand(me):
 110     rng = C.SSLRand(T.span(16), T.span(32), C.md5, C.sha)
 111     me.check_rand(rng)
 112   def test_tlsdx(me):
 113     rng = C.TLSDataExpansion(T.span(16), T.span(32), C.sha256_hmac)
 114     me.check_rand(rng)
 115   def test_tlsprf(me):
 116     rng = C.TLSPRF(T.span(16), T.span(32), C.md5_hmac, C.sha_hmac)
 117     me.check_rand(rng)
 118
 119   def test_dsarand(me):
 120     seed = T.span(16)
 121     n = C.MP.loadb(seed)
 122     rng = C.DSARand(seed)
 123     me.check_rand(rng)
 124     if T.MAXFIXNUM == (1 << 31) - 1: steps = 153 + 3
 125     elif T.MAXFIXNUM == (1 << 63) - 1: steps = 153
 126     else: steps = None
 127     if steps is not None: me.assertEqual(rng.seed, (n + steps).storeb(16))
 128
 129   def test_bbs(me):
 130     ev = T.EventRecorder()
 131     drng = T.detrand("bbs")
 132     rngpriv = C.BBSPriv.generate(1536, event = ev, rng = drng)
 133     me.assertEqual(rngpriv.n.nbits, 1536)
 134     me.assertEqual(rngpriv.p&3, 3)
 135     me.assertEqual(rngpriv.q&3, 3)
 136     me.assertTrue(rngpriv.p.primep())
 137     me.assertTrue(rngpriv.q.primep())
 138     me.assertEqual(rngpriv.n, rngpriv.p*rngpriv.q)
 139     me.assertEqual(ev.events,
 140                    "[p [s]:F10/P7/D]"
 141                    "[p [t]:F2/P7/D]"
 142                    "[p [r]:F7/P7/D]"
 143                    "[p:F6/P3/D]"
 144                    "[q [s]:P7/D]"
 145                    "[q [t]:F33/P7/D]"
 146                    "[q [r]:F33/P7/D]"
 147                    "[q:F55/P3/D]")
 148
 149     x0 = drng.range(rngpriv.n)
 150     rngpriv.seedmp(x0)
 151     rng = C.BlumBlumShub(rngpriv.n, x0)
 152     me.check_rand(rngpriv)
 153     me.check_rand(rng)
 154     me.assertEqual(rngpriv.x, rng.x)
 155
 156     msg = T.span(123)
 157     rng.wrap()
 158     ct = rng.mask(msg)
 159     rng.wrap()
 160
 161     rngpriv.x = rng.x
 162     nsteps = (123*8 + 7)//(rng.stepsz)
 163     rngpriv.rew(nsteps + 1)
 164     me.assertEqual(rngpriv.mask(ct), msg)
 165
 166 ###----- That's all, folks --------------------------------------------------
 167
 168 if __name__ == "__main__": U.main()