From 01ea3d4b9a3c6f3e0303c2d421a248715a96af99 Mon Sep 17 00:00:00 2001 From: Richard van der Hoff Date: Tue, 24 May 2016 17:52:35 +0100 Subject: Fix handling of integer wraparound in megolm.c --- tests/test_megolm.cpp | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'tests') diff --git a/tests/test_megolm.cpp b/tests/test_megolm.cpp index 871de36..bf53346 100644 --- a/tests/test_megolm.cpp +++ b/tests/test_megolm.cpp @@ -82,4 +82,20 @@ std::uint8_t random_bytes[] = assert_equals(expected3, megolm_get_data(&mr), MEGOLM_RATCHET_LENGTH); } +{ + TestCase test_case("Megolm::advance wraparound"); + + Megolm mr1, mr2; + + megolm_init(&mr1, random_bytes, 0xffffffffUL); + megolm_advance_to(&mr1, 0x1000000); + assert_equals(0x1000000U, mr1.counter); + + megolm_init(&mr2, random_bytes, 0); + megolm_advance_to(&mr2, 0x2000000); + assert_equals(0x2000000U, mr2.counter); + + assert_equals(megolm_get_data(&mr2), megolm_get_data(&mr1), MEGOLM_RATCHET_LENGTH); +} + } -- cgit v1.2.3