mirror of https://git.tukaani.org/xz.git
Tests: Refactor test_stream_flags.c.
Converts test_stream_flags to tuktest. Also the test will now compile and skip properly if encoders or decoders are disabled. Thanks to Sebastian Andrzej Siewior.
This commit is contained in:
Jia Tan
Lasse Collin
parent
827ac5b482
commit
6a86e81cab
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@ -3,7 +3,8 @@
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/// \file test_stream_flags.c
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/// \brief Tests Stream Header and Stream Footer coders
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//
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// Author: Lasse Collin
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// Authors: Jia Tan
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// Lasse Collin
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//
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// This file has been put into the public domain.
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// You can do whatever you want with this file.
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@ -13,168 +14,466 @@
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#include "tests.h"
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static lzma_stream_flags known_flags;
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static lzma_stream_flags decoded_flags;
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static uint8_t buffer[LZMA_STREAM_HEADER_SIZE];
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// Size of the Stream Flags field
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// (taken from src/liblzma/common/stream_flags_common.h)
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#define XZ_STREAM_FLAGS_SIZE 2
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#ifdef HAVE_ENCODERS
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// Header and footer magic bytes for .xz file format
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// (taken from src/liblzma/common/stream_flags_common.c)
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static const uint8_t xz_header_magic[6]
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= { 0xFD, 0x37, 0x7A, 0x58, 0x5A, 0x00 };
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static const uint8_t xz_footer_magic[2] = { 0x59, 0x5A };
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#endif
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static bool
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validate(void)
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#ifdef HAVE_ENCODERS
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static void
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stream_header_encode_helper(lzma_check check)
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{
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// TODO: This could require the specific error type as an argument.
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// We could also test that lzma_stream_flags_compare() gives
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// the correct return values in different situations.
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return lzma_stream_flags_compare(&known_flags, &decoded_flags)
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!= LZMA_OK;
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lzma_stream_flags flags = {
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.version = 0,
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.check = check,
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};
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uint8_t header[LZMA_STREAM_HEADER_SIZE];
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// Encode Stream Header
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assert_lzma_ret(lzma_stream_header_encode(&flags, header), LZMA_OK);
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// Stream Header must start with Header Magic Bytes
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const uint32_t magic_size = sizeof(xz_header_magic);
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assert_array_eq(header, xz_header_magic, magic_size);
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// Next must come Stream Flags
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const uint8_t *encoded_stream_flags = header + magic_size;
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// First byte is always null-byte.
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// Second byte must have the Check ID in the lowest four bits
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// and the highest four bits zero.
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const uint8_t expected_stream_flags[] = { 0, check };
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assert_array_eq(encoded_stream_flags, expected_stream_flags,
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XZ_STREAM_FLAGS_SIZE);
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// Last part is the CRC32 of the Stream Flags
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const uint8_t *crc_ptr = encoded_stream_flags + XZ_STREAM_FLAGS_SIZE;
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const uint32_t expected_crc = lzma_crc32(expected_stream_flags,
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XZ_STREAM_FLAGS_SIZE, 0);
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assert_uint_eq(read32le(crc_ptr), expected_crc);
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}
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#endif
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static void
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test_lzma_stream_header_encode(void)
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{
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#ifndef HAVE_ENCODERS
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assert_skip("Encoder support disabled");
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#else
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for (int i = 0; i < LZMA_CHECK_ID_MAX; i++)
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stream_header_encode_helper(i);
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lzma_stream_flags flags = {
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.version = 0,
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.check = LZMA_CHECK_CRC32
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};
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uint8_t header[LZMA_STREAM_HEADER_SIZE];
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// Should fail if version > 0
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flags.version = 1;
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assert_lzma_ret(lzma_stream_header_encode(&flags, header),
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LZMA_OPTIONS_ERROR);
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flags.version = 0;
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// Should fail if Check ID is invalid
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flags.check = LZMA_CHECK_ID_MAX + 1;
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assert_lzma_ret(lzma_stream_header_encode(&flags, header),
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LZMA_PROG_ERROR);
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flags.check = LZMA_CHECK_CRC32;
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// Should pass even if Backward Size is invalid
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// because Stream Header doesn't have that field.
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flags.backward_size = LZMA_VLI_MAX + 1;
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assert_lzma_ret(lzma_stream_header_encode(&flags, header), LZMA_OK);
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#endif
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}
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static bool
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test_header_decoder(lzma_ret expected_ret)
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#if defined(HAVE_ENCODERS)
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static void
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stream_footer_encode_helper(lzma_check check)
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{
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memcrap(&decoded_flags, sizeof(decoded_flags));
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lzma_stream_flags flags = {
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.version = 0,
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.check = check,
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.backward_size = LZMA_BACKWARD_SIZE_MIN,
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};
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if (lzma_stream_header_decode(&decoded_flags, buffer) != expected_ret)
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return true;
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uint8_t footer[LZMA_STREAM_HEADER_SIZE];
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if (expected_ret != LZMA_OK)
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return false;
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// Encode Stream Footer
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assert_lzma_ret(lzma_stream_footer_encode(&flags, footer), LZMA_OK);
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// Header doesn't have Backward Size, so make
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// lzma_stream_flags_compare() ignore it.
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decoded_flags.backward_size = LZMA_VLI_UNKNOWN;
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return validate();
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// Stream Footer must start with CRC32
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const uint32_t crc = read32le(footer);
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const uint32_t expected_crc = lzma_crc32(footer + sizeof(uint32_t),
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LZMA_STREAM_HEADER_SIZE - (sizeof(uint32_t) +
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sizeof(xz_footer_magic)), 0);
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assert_uint_eq(crc, expected_crc);
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// Next the Backward Size
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const uint32_t backwards_size = read32le(footer + sizeof(uint32_t));
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const uint32_t expected_backwards_size = flags.backward_size / 4 - 1;
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assert_uint_eq(backwards_size, expected_backwards_size);
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// Next the Stream Flags
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const uint8_t *stream_flags = footer + sizeof(uint32_t) * 2;
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// First byte must be null
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assert_uint_eq(stream_flags[0], 0);
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// Second byte must have the Check ID in the lowest four bits
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// and the highest four bits zero.
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assert_uint_eq(stream_flags[1], check);
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// And ends with Footer Magic Bytes
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const uint8_t *expected_footer_magic = stream_flags +
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XZ_STREAM_FLAGS_SIZE;
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assert_array_eq(expected_footer_magic, xz_footer_magic,
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sizeof(xz_footer_magic));
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}
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#endif
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static void
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test_lzma_stream_footer_encode(void)
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{
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#ifndef HAVE_ENCODERS
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assert_skip("Encoder support disabled");
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#else
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for (int i = 0; i < LZMA_CHECK_ID_MAX; i++)
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stream_footer_encode_helper(i);
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lzma_stream_flags flags = {
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.version = 0,
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.backward_size = LZMA_BACKWARD_SIZE_MIN,
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.check = LZMA_CHECK_CRC32
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};
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uint8_t footer[LZMA_STREAM_HEADER_SIZE];
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// Should fail if version > 0
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flags.version = 1;
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assert_lzma_ret(lzma_stream_footer_encode(&flags, footer),
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LZMA_OPTIONS_ERROR);
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flags.version = 0;
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// Should fail if Check ID is invalid
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flags.check = LZMA_CHECK_ID_MAX + 1;
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assert_lzma_ret(lzma_stream_footer_encode(&flags, footer),
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LZMA_PROG_ERROR);
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// Should fail if Backward Size is invalid
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flags.backward_size -= 1;
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assert_lzma_ret(lzma_stream_footer_encode(&flags, footer),
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LZMA_PROG_ERROR);
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flags.backward_size += 2;
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assert_lzma_ret(lzma_stream_footer_encode(&flags, footer),
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LZMA_PROG_ERROR);
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flags.backward_size = LZMA_BACKWARD_SIZE_MAX + 4;
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assert_lzma_ret(lzma_stream_footer_encode(&flags, footer),
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LZMA_PROG_ERROR);
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#endif
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}
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#if defined(HAVE_ENCODERS) && defined(HAVE_DECODERS)
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static void
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stream_header_decode_helper(lzma_check check)
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{
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lzma_stream_flags flags = {
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.version = 0,
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.check = check
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};
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uint8_t header[LZMA_STREAM_HEADER_SIZE];
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assert_lzma_ret(lzma_stream_header_encode(&flags, header), LZMA_OK);
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lzma_stream_flags dest_flags;
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assert_lzma_ret(lzma_stream_header_decode(&dest_flags, header),
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LZMA_OK);
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// Version should be 0
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assert_uint_eq(dest_flags.version, 0);
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// Backward Size should be LZMA_VLI_UNKNOWN
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assert_uint_eq(dest_flags.backward_size, LZMA_VLI_UNKNOWN);
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// Check ID must equal the argument given to this function.
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assert_uint_eq(dest_flags.check, check);
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}
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#endif
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static void
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test_lzma_stream_header_decode(void)
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{
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#if !defined(HAVE_ENCODERS) || !defined(HAVE_DECODERS)
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assert_skip("Encoder or decoder support disabled");
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#else
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for (int i = 0; i < LZMA_CHECK_ID_MAX; i++)
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stream_header_decode_helper(i);
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lzma_stream_flags flags = {
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.version = 0,
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.check = LZMA_CHECK_CRC32
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};
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uint8_t header[LZMA_STREAM_HEADER_SIZE];
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lzma_stream_flags dest;
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// First encode known flags to header buffer
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assert_lzma_ret(lzma_stream_header_encode(&flags, header), LZMA_OK);
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// Should fail if magic bytes do not match
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header[0] ^= 1;
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assert_lzma_ret(lzma_stream_header_decode(&dest, header),
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LZMA_FORMAT_ERROR);
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header[0] ^= 1;
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// Should fail if a reserved bit is set
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uint8_t *stream_flags = header + sizeof(xz_header_magic);
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stream_flags[0] = 1;
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// Need to adjust CRC32 after making a change since the CRC32
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// is verified before decoding the Stream Flags field.
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uint8_t *crc32_ptr = header + sizeof(xz_header_magic)
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+ XZ_STREAM_FLAGS_SIZE;
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const uint32_t crc_orig = read32le(crc32_ptr);
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uint32_t new_crc32 = lzma_crc32(
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stream_flags, XZ_STREAM_FLAGS_SIZE, 0);
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write32le(crc32_ptr, new_crc32);
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assert_lzma_ret(lzma_stream_header_decode(&dest, header),
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LZMA_OPTIONS_ERROR);
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stream_flags[0] = 0;
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write32le(crc32_ptr, crc_orig);
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// Should fail if upper bits of check ID are set
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stream_flags[1] |= 0xF0;
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new_crc32 = lzma_crc32(stream_flags, XZ_STREAM_FLAGS_SIZE, 0);
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write32le(crc32_ptr, new_crc32);
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assert_lzma_ret(lzma_stream_header_decode(&dest, header),
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LZMA_OPTIONS_ERROR);
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stream_flags[1] = flags.check;
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write32le(crc32_ptr, crc_orig);
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// Should fail if CRC32 does not match.
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// First, alter a byte in the Stream Flags.
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stream_flags[0] = 1;
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assert_lzma_ret(lzma_stream_header_decode(&dest, header),
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LZMA_DATA_ERROR);
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stream_flags[0] = 0;
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// Next, change the CRC32.
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*crc32_ptr ^= 1;
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assert_lzma_ret(lzma_stream_header_decode(&dest, header),
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LZMA_DATA_ERROR);
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#endif
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}
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#if defined(HAVE_ENCODERS) && defined(HAVE_DECODERS)
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static void
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stream_footer_decode_helper(lzma_check check)
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{
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lzma_stream_flags flags = {
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.version = 0,
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.backward_size = LZMA_BACKWARD_SIZE_MIN,
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.check = check,
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};
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uint8_t footer[LZMA_STREAM_HEADER_SIZE];
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assert_lzma_ret(lzma_stream_footer_encode(&flags, footer), LZMA_OK);
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lzma_stream_flags dest_flags;
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assert_lzma_ret(lzma_stream_footer_decode(&dest_flags, footer),
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LZMA_OK);
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// Version should be 0.
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assert_uint_eq(dest_flags.version, 0);
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// Backward Size should equal the value from the flags.
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assert_uint_eq(dest_flags.backward_size, flags.backward_size);
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// Check ID must equal argument given to this function.
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assert_uint_eq(dest_flags.check, check);
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}
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#endif
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static void
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test_lzma_stream_footer_decode(void)
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{
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#if !defined(HAVE_ENCODERS) || !defined(HAVE_DECODERS)
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assert_skip("Encoder or decoder support disabled");
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#else
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for (int i = 0; i < LZMA_CHECK_ID_MAX; i++)
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stream_footer_decode_helper(i);
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lzma_stream_flags flags = {
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.version = 0,
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.check = LZMA_CHECK_CRC32,
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.backward_size = LZMA_BACKWARD_SIZE_MIN
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};
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uint8_t footer[LZMA_STREAM_HEADER_SIZE];
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lzma_stream_flags dest;
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// First encode known flags to the footer buffer
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assert_lzma_ret(lzma_stream_footer_encode(&flags, footer), LZMA_OK);
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// Should fail if magic bytes do not match
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footer[LZMA_STREAM_HEADER_SIZE - 1] ^= 1;
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assert_lzma_ret(lzma_stream_footer_decode(&dest, footer),
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LZMA_FORMAT_ERROR);
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footer[LZMA_STREAM_HEADER_SIZE - 1] ^= 1;
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// Should fail if a reserved bit is set.
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// In the Stream Footer, the Stream Flags follow the CRC32 (4 bytes)
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// and the Backward Size (4 bytes)
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uint8_t *stream_flags = footer + sizeof(uint32_t) * 2;
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stream_flags[0] = 1;
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// Need to adjust the CRC32 so it will not fail that check instead
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uint8_t *crc32_ptr = footer;
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const uint32_t crc_orig = read32le(crc32_ptr);
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uint8_t *backward_size = footer + sizeof(uint32_t);
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uint32_t new_crc32 = lzma_crc32(backward_size, sizeof(uint32_t) +
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XZ_STREAM_FLAGS_SIZE, 0);
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write32le(crc32_ptr, new_crc32);
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assert_lzma_ret(lzma_stream_footer_decode(&dest, footer),
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LZMA_OPTIONS_ERROR);
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stream_flags[0] = 0;
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write32le(crc32_ptr, crc_orig);
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// Should fail if upper bits of check ID are set
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stream_flags[1] |= 0xF0;
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new_crc32 = lzma_crc32(backward_size, sizeof(uint32_t) +
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XZ_STREAM_FLAGS_SIZE, 0);
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write32le(crc32_ptr, new_crc32);
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assert_lzma_ret(lzma_stream_footer_decode(&dest, footer),
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LZMA_OPTIONS_ERROR);
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stream_flags[1] = flags.check;
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write32le(crc32_ptr, crc_orig);
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// Should fail if CRC32 does not match.
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// First, alter a byte in the Stream Flags.
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stream_flags[0] = 1;
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assert_lzma_ret(lzma_stream_footer_decode(&dest, footer),
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LZMA_DATA_ERROR);
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stream_flags[0] = 0;
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// Next, change the CRC32
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*crc32_ptr ^= 1;
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assert_lzma_ret(lzma_stream_footer_decode(&dest, footer),
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LZMA_DATA_ERROR);
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#endif
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}
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static void
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test_header(void)
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test_lzma_stream_flags_compare(void)
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{
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memcrap(buffer, sizeof(buffer));
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expect(lzma_stream_header_encode(&known_flags, buffer) == LZMA_OK);
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succeed(test_header_decoder(LZMA_OK));
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}
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lzma_stream_flags first = {
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.version = 0,
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.backward_size = LZMA_BACKWARD_SIZE_MIN,
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.check = LZMA_CHECK_CRC32,
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};
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lzma_stream_flags second = first;
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static bool
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test_footer_decoder(lzma_ret expected_ret)
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{
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memcrap(&decoded_flags, sizeof(decoded_flags));
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// First test should pass
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assert_lzma_ret(lzma_stream_flags_compare(&first, &second), LZMA_OK);
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if (lzma_stream_footer_decode(&decoded_flags, buffer) != expected_ret)
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return true;
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// Altering either version should cause an error
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first.version = 1;
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assert_lzma_ret(lzma_stream_flags_compare(&first, &second),
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LZMA_OPTIONS_ERROR);
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second.version = 1;
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assert_lzma_ret(lzma_stream_flags_compare(&first, &second),
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LZMA_OPTIONS_ERROR);
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first.version = 0;
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assert_lzma_ret(lzma_stream_flags_compare(&first, &second),
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LZMA_OPTIONS_ERROR);
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second.version = 0;
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if (expected_ret != LZMA_OK)
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return false;
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// Check types must be under the maximum
|
||||
first.check = LZMA_CHECK_ID_MAX + 1;
|
||||
assert_lzma_ret(lzma_stream_flags_compare(&first, &second),
|
||||
LZMA_PROG_ERROR);
|
||||
second.check = LZMA_CHECK_ID_MAX + 1;
|
||||
assert_lzma_ret(lzma_stream_flags_compare(&first, &second),
|
||||
LZMA_PROG_ERROR);
|
||||
first.check = LZMA_CHECK_CRC32;
|
||||
assert_lzma_ret(lzma_stream_flags_compare(&first, &second),
|
||||
LZMA_PROG_ERROR);
|
||||
second.check = LZMA_CHECK_CRC32;
|
||||
|
||||
return validate();
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
test_footer(void)
|
||||
{
|
||||
memcrap(buffer, sizeof(buffer));
|
||||
expect(lzma_stream_footer_encode(&known_flags, buffer) == LZMA_OK);
|
||||
succeed(test_footer_decoder(LZMA_OK));
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
test_encode_invalid(void)
|
||||
{
|
||||
known_flags.check = (lzma_check)(LZMA_CHECK_ID_MAX + 1);
|
||||
known_flags.backward_size = 1024;
|
||||
|
||||
expect(lzma_stream_header_encode(&known_flags, buffer)
|
||||
== LZMA_PROG_ERROR);
|
||||
|
||||
expect(lzma_stream_footer_encode(&known_flags, buffer)
|
||||
== LZMA_PROG_ERROR);
|
||||
|
||||
known_flags.check = (lzma_check)(-1);
|
||||
|
||||
expect(lzma_stream_header_encode(&known_flags, buffer)
|
||||
== LZMA_PROG_ERROR);
|
||||
|
||||
expect(lzma_stream_footer_encode(&known_flags, buffer)
|
||||
== LZMA_PROG_ERROR);
|
||||
|
||||
known_flags.check = LZMA_CHECK_NONE;
|
||||
known_flags.backward_size = 0;
|
||||
|
||||
// Header encoder ignores backward_size.
|
||||
expect(lzma_stream_header_encode(&known_flags, buffer) == LZMA_OK);
|
||||
|
||||
expect(lzma_stream_footer_encode(&known_flags, buffer)
|
||||
== LZMA_PROG_ERROR);
|
||||
|
||||
known_flags.backward_size = LZMA_VLI_MAX;
|
||||
|
||||
expect(lzma_stream_header_encode(&known_flags, buffer) == LZMA_OK);
|
||||
|
||||
expect(lzma_stream_footer_encode(&known_flags, buffer)
|
||||
== LZMA_PROG_ERROR);
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
test_decode_invalid(void)
|
||||
{
|
||||
known_flags.check = LZMA_CHECK_NONE;
|
||||
known_flags.backward_size = 1024;
|
||||
|
||||
expect(lzma_stream_header_encode(&known_flags, buffer) == LZMA_OK);
|
||||
|
||||
// Test 1 (invalid Magic Bytes)
|
||||
buffer[5] ^= 1;
|
||||
succeed(test_header_decoder(LZMA_FORMAT_ERROR));
|
||||
buffer[5] ^= 1;
|
||||
|
||||
// Test 2a (valid CRC32)
|
||||
uint32_t crc = lzma_crc32(buffer + 6, 2, 0);
|
||||
write32le(buffer + 8, crc);
|
||||
succeed(test_header_decoder(LZMA_OK));
|
||||
|
||||
// Test 2b (invalid Stream Flags with valid CRC32)
|
||||
buffer[6] ^= 0x20;
|
||||
crc = lzma_crc32(buffer + 6, 2, 0);
|
||||
write32le(buffer + 8, crc);
|
||||
succeed(test_header_decoder(LZMA_OPTIONS_ERROR));
|
||||
|
||||
// Test 3 (invalid CRC32)
|
||||
expect(lzma_stream_header_encode(&known_flags, buffer) == LZMA_OK);
|
||||
buffer[9] ^= 1;
|
||||
succeed(test_header_decoder(LZMA_DATA_ERROR));
|
||||
|
||||
// Test 4 (invalid Stream Flags with valid CRC32)
|
||||
expect(lzma_stream_footer_encode(&known_flags, buffer) == LZMA_OK);
|
||||
buffer[9] ^= 0x40;
|
||||
crc = lzma_crc32(buffer + 4, 6, 0);
|
||||
write32le(buffer, crc);
|
||||
succeed(test_footer_decoder(LZMA_OPTIONS_ERROR));
|
||||
|
||||
// Test 5 (invalid Magic Bytes)
|
||||
expect(lzma_stream_footer_encode(&known_flags, buffer) == LZMA_OK);
|
||||
buffer[11] ^= 1;
|
||||
succeed(test_footer_decoder(LZMA_FORMAT_ERROR));
|
||||
}
|
||||
|
||||
|
||||
int
|
||||
main(void)
|
||||
{
|
||||
// Valid headers
|
||||
known_flags.backward_size = 1024;
|
||||
for (lzma_check check = LZMA_CHECK_NONE;
|
||||
check <= LZMA_CHECK_ID_MAX; ++check) {
|
||||
test_header();
|
||||
test_footer();
|
||||
// Check types must be equal
|
||||
for (uint32_t i = 0; i < LZMA_CHECK_ID_MAX; i++) {
|
||||
first.check = i;
|
||||
if (i == second.check)
|
||||
assert_lzma_ret(lzma_stream_flags_compare(&first,
|
||||
&second), LZMA_OK);
|
||||
else
|
||||
assert_lzma_ret(lzma_stream_flags_compare(&first,
|
||||
&second), LZMA_DATA_ERROR);
|
||||
}
|
||||
first.check = LZMA_CHECK_CRC32;
|
||||
|
||||
// Invalid headers
|
||||
test_encode_invalid();
|
||||
test_decode_invalid();
|
||||
// Backward Size comparison is skipped if either are LZMA_VLI_UNKNOWN
|
||||
first.backward_size = LZMA_VLI_UNKNOWN;
|
||||
assert_lzma_ret(lzma_stream_flags_compare(&first, &second), LZMA_OK);
|
||||
second.backward_size = LZMA_VLI_MAX + 1;
|
||||
assert_lzma_ret(lzma_stream_flags_compare(&first, &second), LZMA_OK);
|
||||
second.backward_size = LZMA_BACKWARD_SIZE_MIN;
|
||||
|
||||
return 0;
|
||||
// Backward Sizes need to be valid
|
||||
first.backward_size = LZMA_VLI_MAX + 4;
|
||||
assert_lzma_ret(lzma_stream_flags_compare(&first, &second),
|
||||
LZMA_PROG_ERROR);
|
||||
second.backward_size = LZMA_VLI_MAX + 4;
|
||||
assert_lzma_ret(lzma_stream_flags_compare(&first, &second),
|
||||
LZMA_PROG_ERROR);
|
||||
first.backward_size = LZMA_BACKWARD_SIZE_MIN;
|
||||
assert_lzma_ret(lzma_stream_flags_compare(&first, &second),
|
||||
LZMA_PROG_ERROR);
|
||||
second.backward_size = LZMA_BACKWARD_SIZE_MIN;
|
||||
|
||||
// Backward Sizes must be equal
|
||||
second.backward_size = first.backward_size + 4;
|
||||
assert_lzma_ret(lzma_stream_flags_compare(&first, &second),
|
||||
LZMA_DATA_ERROR);
|
||||
|
||||
// Should fail if Backward Sizes are > LZMA_BACKWARD_SIZE_MAX
|
||||
// even though they are equal
|
||||
first.backward_size = LZMA_BACKWARD_SIZE_MAX + 1;
|
||||
second.backward_size = LZMA_BACKWARD_SIZE_MAX + 1;
|
||||
assert_lzma_ret(lzma_stream_flags_compare(&first, &second),
|
||||
LZMA_PROG_ERROR);
|
||||
}
|
||||
|
||||
|
||||
extern int
|
||||
main(int argc, char **argv)
|
||||
{
|
||||
tuktest_start(argc, argv);
|
||||
tuktest_run(test_lzma_stream_header_encode);
|
||||
tuktest_run(test_lzma_stream_footer_encode);
|
||||
tuktest_run(test_lzma_stream_header_decode);
|
||||
tuktest_run(test_lzma_stream_footer_decode);
|
||||
tuktest_run(test_lzma_stream_flags_compare);
|
||||
return tuktest_end();
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue