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Tests: test_check: Test corner cases of CLMUL CRC64.

This commit is contained in:
Lasse Collin 2022-12-30 20:10:08 +02:00
parent ce96bb2043
commit dfecda8752
1 changed files with 27 additions and 0 deletions
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27
tests/test_check.c
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@ -50,6 +50,22 @@ static uint8_t *sha256_xz_data;
#endif
#ifdef HAVE_CHECK_CRC64
static const uint8_t *
get_random256(uint32_t *seed)
{
static uint8_t buf[256];
for (size_t i = 0; i < sizeof(buf); ++i) {
*seed = *seed * 1103515245 + 12345;
buf[i] = (uint8_t)(*seed >> 22);
}
return buf;
}
#endif
static void
test_lzma_crc32(void)
{
@ -99,6 +115,17 @@ test_lzma_crc64(void)
for (size_t i = 0; i < sizeof(test_string); ++i)
crc = lzma_crc64(test_string + i, 1, crc);
assert_uint_eq(crc, test_vector);
// Test 4: The CLMUL implementation works on 16-byte chunks.
// Test combination of different start and end alignments
// and also short buffer lengths where special handling is needed.
uint32_t seed = 29;
crc = 0x96E30D5184B7FA2C; // Random initial value
for (size_t start = 0; start < 32; ++start)
for (size_t size = 1; size < 256 - 32; ++size)
crc = lzma_crc64(get_random256(&seed), size, crc);
assert_uint_eq(crc, 0x23AB787177231C9F);
#endif
}