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| -rw-r--r-- | tests/test_index_hash.c | 388 |
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diff --git a/tests/test_index_hash.c b/tests/test_index_hash.c new file mode 100644 index 00000000..2cf91138 --- /dev/null +++ b/tests/test_index_hash.c @@ -0,0 +1,388 @@ +/////////////////////////////////////////////////////////////////////////////// +// +/// \file test_index_hash.c +/// \brief Tests src/liblzma/common/index_hash.c API functions +/// +/// \note No test included for lzma_index_hash_end since it +/// would be trivial unless tested for memory leaks +/// with something like valgrind +// +// Author: Jia Tan +// +// This file has been put into the public domain. +// You can do whatever you want with this file. +// +/////////////////////////////////////////////////////////////////////////////// + +#include "tests.h" + +// Needed for UNPADDED_SIZE_MIN and UNPADDED_SIZE_MAX macro definitions +// and index_size and vli_ceil4 helper functions +#include "common/index.h" + + +static void +test_lzma_index_hash_init(void) +{ +#ifndef HAVE_DECODERS + assert_skip("Decoder support disabled"); +#else + // First test with NULL index_hash. + // This should create a fresh index_hash. + lzma_index_hash *index_hash = lzma_index_hash_init(NULL, NULL); + assert_true(index_hash != NULL); + + // Next test with non-NULL index_hash. + lzma_index_hash *second_hash = lzma_index_hash_init(index_hash, NULL); + + // It should not create a new index_hash pointer. + // Instead it must just re-init the first index_hash. + assert_true(index_hash == second_hash); + + lzma_index_hash_end(index_hash, NULL); +#endif +} + + +static void +test_lzma_index_hash_append(void) +{ +#ifndef HAVE_DECODERS + assert_skip("Decoder support disabled"); +#else + // Test all invalid parameters + assert_lzma_ret(lzma_index_hash_append(NULL, 0, 0), + LZMA_PROG_ERROR); + + // Test NULL index_hash + assert_lzma_ret(lzma_index_hash_append(NULL, UNPADDED_SIZE_MIN, + LZMA_VLI_MAX), LZMA_PROG_ERROR); + + // Test with invalid Unpadded Size + lzma_index_hash *index_hash = lzma_index_hash_init(NULL, NULL); + assert_true(index_hash != NULL); + assert_lzma_ret(lzma_index_hash_append(index_hash, + UNPADDED_SIZE_MIN - 1, LZMA_VLI_MAX), + LZMA_PROG_ERROR); + + // Test with invalid Uncompressed Size + assert_lzma_ret(lzma_index_hash_append(index_hash, + UNPADDED_SIZE_MIN, LZMA_VLI_MAX + 1), + LZMA_PROG_ERROR); + + // First append a Record describing a small Block. + // This should succeed. + assert_lzma_ret(lzma_index_hash_append(index_hash, + UNPADDED_SIZE_MIN, 1), LZMA_OK); + + // Append another small Record. + assert_lzma_ret(lzma_index_hash_append(index_hash, + UNPADDED_SIZE_MIN, 1), LZMA_OK); + + // Append a Record that would cause the compressed size to grow + // too big + assert_lzma_ret(lzma_index_hash_append(index_hash, + UNPADDED_SIZE_MAX, 1), LZMA_DATA_ERROR); + + lzma_index_hash_end(index_hash, NULL); +#endif +} + + +#ifdef HAVE_DECODERS +// Fill an index_hash with unpadded and uncompressed VLIs +// by calling lzma_index_hash_append +static void +fill_index_hash(lzma_index_hash *index_hash, const lzma_vli *unpadded_sizes, + const lzma_vli *uncomp_sizes, uint32_t block_count) +{ + for (uint32_t i = 0; i < block_count; ++i) + assert_lzma_ret(lzma_index_hash_append(index_hash, + unpadded_sizes[i], uncomp_sizes[i]), LZMA_OK); +} + + +#ifdef HAVE_ENCODERS +// Set the contents of buf to the expected Index based on the +// .xz specification. This needs the unpadded and uncompressed VLIs +// to correctly create the Index. +static void +generate_index(uint8_t *buf, const lzma_vli *unpadded_sizes, + const lzma_vli *uncomp_sizes, uint32_t block_count, + size_t index_max_size) +{ + size_t in_pos = 0; + size_t out_pos = 0; + + // First set Index Indicator + buf[out_pos++] = INDEX_INDICATOR; + + // Next write out Number of Records + assert_lzma_ret(lzma_vli_encode(block_count, &in_pos, buf, + &out_pos, index_max_size), LZMA_STREAM_END); + + // Next write out each Record. + // A Record consists of Unpadded Size and Uncompressed Size + // written next to each other as VLIs. + for (uint32_t i = 0; i < block_count; ++i) { + in_pos = 0; + assert_lzma_ret(lzma_vli_encode(unpadded_sizes[i], &in_pos, + buf, &out_pos, index_max_size), LZMA_STREAM_END); + in_pos = 0; + assert_lzma_ret(lzma_vli_encode(uncomp_sizes[i], &in_pos, + buf, &out_pos, index_max_size), LZMA_STREAM_END); + } + + // Add Index Padding + lzma_vli rounded_out_pos = vli_ceil4(out_pos); + memzero(buf + out_pos, rounded_out_pos - out_pos); + out_pos = rounded_out_pos; + + // Add the CRC32 + write32le(buf + out_pos, lzma_crc32(buf, out_pos, 0)); + out_pos += 4; + + assert_uint_eq(out_pos, index_max_size); +} +#endif +#endif + + +static void +test_lzma_index_hash_decode(void) +{ +#if !defined(HAVE_ENCODERS) || !defined(HAVE_DECODERS) + assert_skip("Encoder or decoder support disabled"); +#else + lzma_index_hash *index_hash = lzma_index_hash_init(NULL, NULL); + assert_true(index_hash != NULL); + + size_t in_pos = 0; + + // Six valid values for the Unpadded Size fields in an Index + const lzma_vli unpadded_sizes[6] = { + UNPADDED_SIZE_MIN, + 1000, + 4000, + 8000, + 16000, + 32000 + }; + + // Six valid values for the Uncompressed Size fields in an Index + const lzma_vli uncomp_sizes[6] = { + 1, + 500, + 8000, + 20, + 1, + 500 + }; + + // Add two Records to an index_hash + fill_index_hash(index_hash, unpadded_sizes, uncomp_sizes, 2); + + const lzma_vli size_two_records = lzma_index_hash_size(index_hash); + assert_uint(size_two_records, >, 0); + uint8_t *index_two_records = tuktest_malloc(size_two_records); + + generate_index(index_two_records, unpadded_sizes, uncomp_sizes, 2, + size_two_records); + + // First test for basic buffer size error + in_pos = size_two_records + 1; + assert_lzma_ret(lzma_index_hash_decode(index_hash, + index_two_records, &in_pos, + size_two_records), LZMA_BUF_ERROR); + + // Next test for invalid Index Indicator + in_pos = 0; + index_two_records[0] ^= 1; + assert_lzma_ret(lzma_index_hash_decode(index_hash, + index_two_records, &in_pos, + size_two_records), LZMA_DATA_ERROR); + index_two_records[0] ^= 1; + + // Next verify the index_hash as expected + in_pos = 0; + assert_lzma_ret(lzma_index_hash_decode(index_hash, + index_two_records, &in_pos, + size_two_records), LZMA_STREAM_END); + + // Next test an index_hash with three Records + index_hash = lzma_index_hash_init(index_hash, NULL); + fill_index_hash(index_hash, unpadded_sizes, uncomp_sizes, 3); + + const lzma_vli size_three_records = lzma_index_hash_size( + index_hash); + assert_uint(size_three_records, >, 0); + uint8_t *index_three_records = tuktest_malloc(size_three_records); + + generate_index(index_three_records, unpadded_sizes, uncomp_sizes, + 3, size_three_records); + + in_pos = 0; + assert_lzma_ret(lzma_index_hash_decode(index_hash, + index_three_records, &in_pos, + size_three_records), LZMA_STREAM_END); + + // Next test an index_hash with five Records + index_hash = lzma_index_hash_init(index_hash, NULL); + fill_index_hash(index_hash, unpadded_sizes, uncomp_sizes, 5); + + const lzma_vli size_five_records = lzma_index_hash_size( + index_hash); + assert_uint(size_five_records, >, 0); + uint8_t *index_five_records = tuktest_malloc(size_five_records); + + generate_index(index_five_records, unpadded_sizes, uncomp_sizes, 5, + size_five_records); + + // Instead of testing all input at once, give input + // one byte at a time + in_pos = 0; + for (lzma_vli i = 0; i < size_five_records - 1; ++i) { + assert_lzma_ret(lzma_index_hash_decode(index_hash, + index_five_records, &in_pos, in_pos + 1), + LZMA_OK); + } + + // Last byte should return LZMA_STREAM_END + assert_lzma_ret(lzma_index_hash_decode(index_hash, + index_five_records, &in_pos, + in_pos + 1), LZMA_STREAM_END); + + // Next test if the index_hash is given an incorrect Unpadded + // Size. Should detect and report LZMA_DATA_ERROR + index_hash = lzma_index_hash_init(index_hash, NULL); + fill_index_hash(index_hash, unpadded_sizes, uncomp_sizes, 5); + // The sixth Record will have an invalid Unpadded Size + assert_lzma_ret(lzma_index_hash_append(index_hash, + unpadded_sizes[5] + 1, + uncomp_sizes[5]), LZMA_OK); + + const lzma_vli size_six_records = lzma_index_hash_size( + index_hash); + + assert_uint(size_six_records, >, 0); + uint8_t *index_six_records = tuktest_malloc(size_six_records); + + generate_index(index_six_records, unpadded_sizes, uncomp_sizes, 6, + size_six_records); + in_pos = 0; + assert_lzma_ret(lzma_index_hash_decode(index_hash, + index_six_records, &in_pos, + size_six_records), LZMA_DATA_ERROR); + + // Next test if the Index is corrupt (invalid CRC32). + // Should detect and report LZMA_DATA_ERROR + index_hash = lzma_index_hash_init(index_hash, NULL); + fill_index_hash(index_hash, unpadded_sizes, uncomp_sizes, 2); + + index_two_records[size_two_records - 1] ^= 1; + + in_pos = 0; + assert_lzma_ret(lzma_index_hash_decode(index_hash, + index_two_records, &in_pos, + size_two_records), LZMA_DATA_ERROR); + + // Next test with Index and index_hash struct not matching + // a Record + index_hash = lzma_index_hash_init(index_hash, NULL); + fill_index_hash(index_hash, unpadded_sizes, uncomp_sizes, 2); + // Recalculate Index with invalid Unpadded Size + const lzma_vli unpadded_sizes_invalid[2] = { + unpadded_sizes[0], + unpadded_sizes[1] + 1 + }; + + generate_index(index_two_records, unpadded_sizes_invalid, + uncomp_sizes, 2, size_two_records); + + in_pos = 0; + assert_lzma_ret(lzma_index_hash_decode(index_hash, + index_two_records, &in_pos, + size_two_records), LZMA_DATA_ERROR); + + lzma_index_hash_end(index_hash, NULL); +#endif +} + + +static void +test_lzma_index_hash_size(void) +{ +#ifndef HAVE_DECODERS + assert_skip("Decoder support disabled"); +#else + lzma_index_hash *index_hash = lzma_index_hash_init(NULL, NULL); + assert_true(index_hash != NULL); + + // First test empty index_hash + // Expected size should be: + // Index Indicator - 1 byte + // Number of Records - 1 byte + // List of Records - 0 bytes + // Index Padding - 2 bytes + // CRC32 - 4 bytes + // Total - 8 bytes + assert_uint_eq(lzma_index_hash_size(index_hash), 8); + + // Append a Record describing a small Block to the index_hash + assert_lzma_ret(lzma_index_hash_append(index_hash, + UNPADDED_SIZE_MIN, 1), LZMA_OK); + + // Expected size should be: + // Index Indicator - 1 byte + // Number of Records - 1 byte + // List of Records - 2 bytes + // Index Padding - 0 bytes + // CRC32 - 4 bytes + // Total - 8 bytes + lzma_vli expected_size = 8; + assert_uint_eq(lzma_index_hash_size(index_hash), expected_size); + + // Append additional small Record + assert_lzma_ret(lzma_index_hash_append(index_hash, + UNPADDED_SIZE_MIN, 1), LZMA_OK); + + // Expected size should be: + // Index Indicator - 1 byte + // Number of Records - 1 byte + // List of Records - 4 bytes + // Index Padding - 2 bytes + // CRC32 - 4 bytes + // Total - 12 bytes + expected_size = 12; + assert_uint_eq(lzma_index_hash_size(index_hash), expected_size); + + // Append a larger Record to the index_hash (3 bytes for each VLI) + const lzma_vli three_byte_vli = 0x10000; + assert_lzma_ret(lzma_index_hash_append(index_hash, + three_byte_vli, three_byte_vli), LZMA_OK); + + // Expected size should be: + // Index Indicator - 1 byte + // Number of Records - 1 byte + // List of Records - 10 bytes + // Index Padding - 0 bytes + // CRC32 - 4 bytes + // Total - 16 bytes + expected_size = 16; + assert_uint_eq(lzma_index_hash_size(index_hash), expected_size); + + lzma_index_hash_end(index_hash, NULL); +#endif +} + + +extern int +main(int argc, char **argv) +{ + tuktest_start(argc, argv); + tuktest_run(test_lzma_index_hash_init); + tuktest_run(test_lzma_index_hash_append); + tuktest_run(test_lzma_index_hash_decode); + tuktest_run(test_lzma_index_hash_size); + return tuktest_end(); +} |