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| author | Lasse Collin <lasse.collin@tukaani.org> | 2022-12-30 20:10:08 +0200 |
|---|---|---|
| committer | Lasse Collin <lasse.collin@tukaani.org> | 2022-12-30 20:10:08 +0200 |
| commit | dfecda875211f737d0db92dc1d3c58a3a2afb0c0 (patch) | |
| tree | 2d6a7a78b4f7c6d6d948a594d852813a6b6abd09 /tests/test_check.c | |
| parent | Tests: Clarify a comment in test_lzip_decoder.c. (diff) | |
| download | xz-dfecda875211f737d0db92dc1d3c58a3a2afb0c0.tar.xz | |
Tests: test_check: Test corner cases of CLMUL CRC64.
Diffstat (limited to 'tests/test_check.c')
| -rw-r--r-- | tests/test_check.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/tests/test_check.c b/tests/test_check.c index 3c3a6e46..bc52f403 100644 --- a/tests/test_check.c +++ b/tests/test_check.c @@ -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 } |