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///////////////////////////////////////////////////////////////////////////////
//
/// \file test_stream_flags.c
/// \brief Tests Stream Header and Stream Footer coders
//
// Author: Lasse Collin
//
// This file has been put into the public domain.
// You can do whatever you want with this file.
//
///////////////////////////////////////////////////////////////////////////////
#include "tests.h"
static lzma_stream_flags known_flags;
static lzma_stream_flags decoded_flags;
static uint8_t buffer[LZMA_STREAM_HEADER_SIZE];
static bool
validate(void)
{
// TODO: This could require the specific error type as an argument.
// We could also test that lzma_stream_flags_compare() gives
// the correct return values in different situations.
return lzma_stream_flags_compare(&known_flags, &decoded_flags)
!= LZMA_OK;
}
static bool
test_header_decoder(lzma_ret expected_ret)
{
memcrap(&decoded_flags, sizeof(decoded_flags));
if (lzma_stream_header_decode(&decoded_flags, buffer) != expected_ret)
return true;
if (expected_ret != LZMA_OK)
return false;
// Header doesn't have Backward Size, so make
// lzma_stream_flags_compare() ignore it.
decoded_flags.backward_size = LZMA_VLI_UNKNOWN;
return validate();
}
static void
test_header(void)
{
memcrap(buffer, sizeof(buffer));
expect(lzma_stream_header_encode(&known_flags, buffer) == LZMA_OK);
succeed(test_header_decoder(LZMA_OK));
}
static bool
test_footer_decoder(lzma_ret expected_ret)
{
memcrap(&decoded_flags, sizeof(decoded_flags));
if (lzma_stream_footer_decode(&decoded_flags, buffer) != expected_ret)
return true;
if (expected_ret != LZMA_OK)
return false;
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_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);
unaligned_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);
unaligned_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);
unaligned_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();
}
// Invalid headers
test_encode_invalid();
test_decode_invalid();
return 0;
}
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