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///////////////////////////////////////////////////////////////////////////////
//
/// \file test_stream_flags.c
/// \brief Tests Stream Header and Stream tail coders
//
// Copyright (C) 2007 Lasse Collin
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
///////////////////////////////////////////////////////////////////////////////
#include "tests.h"
static lzma_stream_flags known_flags;
static lzma_stream_flags decoded_flags;
static uint8_t buffer[LZMA_STREAM_HEADER_SIZE + LZMA_STREAM_TAIL_SIZE];
static lzma_stream strm = LZMA_STREAM_INIT;
static bool
validate(void)
{
if (known_flags.check != decoded_flags.check
|| known_flags.has_crc32 != decoded_flags.has_crc32
|| known_flags.is_multi != decoded_flags.is_multi)
return true;
return false;
}
static bool
test_header_decoder(size_t expected_size, lzma_ret expected_ret)
{
memcrap(&decoded_flags, sizeof(decoded_flags));
if (lzma_stream_header_decoder(&strm, &decoded_flags) != LZMA_OK)
return true;
if (coder_loop(&strm, buffer, expected_size, NULL, 0,
expected_ret, LZMA_RUN))
return true;
if (expected_ret != LZMA_STREAM_END)
return false;
return validate();
}
static void
test_header(void)
{
memcrap(buffer, sizeof(buffer));
expect(lzma_stream_header_encode(buffer, &known_flags) == LZMA_OK);
succeed(test_header_decoder(LZMA_STREAM_HEADER_SIZE, LZMA_STREAM_END));
}
static bool
test_tail_decoder(size_t expected_size, lzma_ret expected_ret)
{
memcrap(&decoded_flags, sizeof(decoded_flags));
if (lzma_stream_tail_decoder(&strm, &decoded_flags) != LZMA_OK)
return true;
if (coder_loop(&strm, buffer, expected_size, NULL, 0,
expected_ret, LZMA_RUN))
return true;
if (expected_ret == LZMA_STREAM_END && validate())
return true;
return false;
}
static void
test_tail(void)
{
memcrap(buffer, sizeof(buffer));
expect(lzma_stream_tail_encode(buffer, &known_flags) == LZMA_OK);
succeed(test_tail_decoder(LZMA_STREAM_TAIL_SIZE, LZMA_STREAM_END));
}
static void
test_encode_invalid(void)
{
known_flags.check = LZMA_CHECK_ID_MAX + 1;
known_flags.has_crc32 = false;
known_flags.is_multi = false;
expect(lzma_stream_header_encode(buffer, &known_flags)
== LZMA_PROG_ERROR);
expect(lzma_stream_tail_encode(buffer, &known_flags)
== LZMA_PROG_ERROR);
known_flags.check = (lzma_check_type)(-1);
expect(lzma_stream_header_encode(buffer, &known_flags)
== LZMA_PROG_ERROR);
expect(lzma_stream_tail_encode(buffer, &known_flags)
== LZMA_PROG_ERROR);
}
static void
test_decode_invalid(void)
{
known_flags.check = LZMA_CHECK_NONE;
known_flags.has_crc32 = false;
known_flags.is_multi = false;
expect(lzma_stream_header_encode(buffer, &known_flags) == LZMA_OK);
// Test 1 (invalid Magic Bytes)
buffer[5] ^= 1;
succeed(test_header_decoder(6, LZMA_DATA_ERROR));
buffer[5] ^= 1;
// Test 2a (valid CRC32)
uint32_t crc = lzma_crc32(buffer + 6, 1, 0);
for (size_t i = 0; i < 4; ++i)
buffer[7 + i] = crc >> (i * 8);
succeed(test_header_decoder(LZMA_STREAM_HEADER_SIZE, LZMA_STREAM_END));
// Test 2b (invalid Stream Flags with valid CRC32)
buffer[6] ^= 0x20;
crc = lzma_crc32(buffer + 6, 1, 0);
for (size_t i = 0; i < 4; ++i)
buffer[7 + i] = crc >> (i * 8);
succeed(test_header_decoder(7, LZMA_HEADER_ERROR));
// Test 3 (invalid CRC32)
expect(lzma_stream_header_encode(buffer, &known_flags) == LZMA_OK);
buffer[LZMA_STREAM_HEADER_SIZE - 1] ^= 1;
succeed(test_header_decoder(LZMA_STREAM_HEADER_SIZE, LZMA_DATA_ERROR));
// Test 4 (invalid Stream Flags)
expect(lzma_stream_tail_encode(buffer, &known_flags) == LZMA_OK);
buffer[0] ^= 0x40;
succeed(test_tail_decoder(1, LZMA_HEADER_ERROR));
buffer[0] ^= 0x40;
// Test 5 (invalid Magic Bytes)
buffer[2] ^= 1;
succeed(test_tail_decoder(3, LZMA_DATA_ERROR));
}
int
main(void)
{
lzma_init();
// Valid headers
for (lzma_check_type check = LZMA_CHECK_NONE;
check <= LZMA_CHECK_ID_MAX; ++check) {
for (int has_crc32 = 0; has_crc32 <= 1; ++has_crc32) {
for (int is_multi = 0; is_multi <= 1; ++is_multi) {
known_flags.check = check;
known_flags.has_crc32 = has_crc32;
known_flags.is_multi = is_multi;
test_header();
test_tail();
}
}
}
// Invalid headers
test_encode_invalid();
test_decode_invalid();
lzma_end(&strm);
return 0;
}
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