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cryptsuite: add another test I missed.

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I just found a file lying around in a different source directory that
contained a test case I'd had trouble with last week, so now I've
recovered it, it ought to go in the test suite as a regression test.
This commit is contained in:
Simon Tatham 2019-01-03 23:42:50 +00:00
parent 188e2525c7
commit 40e18d98ed
1 changed files with 8 additions and 0 deletions
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8
test/cryptsuite.py
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@ -279,6 +279,14 @@ class mpint(unittest.TestCase):
bm = mp_copy(bi) bm = mp_copy(bi)
self.assertEqual(int(mp_mul(am, bm)), ai * bi) self.assertEqual(int(mp_mul(am, bm)), ai * bi)
# A regression test for a bug that came up during development
# of mpint.c, relating to an intermediate value overflowing
# its container.
ai, bi = (2**8512 * 2 // 3), (2**4224 * 11 // 15)
am = mp_copy(ai)
bm = mp_copy(bi)
self.assertEqual(int(mp_mul(am, bm)), ai * bi)
@staticmethod @staticmethod
def nbits(n): def nbits(n):
# Mimic mp_get_nbits for ordinary Python integers. # Mimic mp_get_nbits for ordinary Python integers.