aboutsummaryrefslogtreecommitdiff
path: root/tests/test_stream_flags.c
blob: 0de87cd15ddcb005cb070d12569feb57f3b02680 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
///////////////////////////////////////////////////////////////////////////////
//
/// \file       test_stream_flags.c
/// \brief      Tests Stream Header and Stream Footer 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];


static bool
validate(void)
{
	return !lzma_stream_flags_equal(&known_flags, &decoded_flags);
}


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_equal() ignore it.
	decoded_flags.backward_size = LZMA_VLI_VALUE_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_type)(-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_VALUE_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);
	integer_write_32(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);
	integer_write_32(buffer + 8, crc);
	succeed(test_header_decoder(LZMA_HEADER_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);
	integer_write_32(buffer, crc);
	succeed(test_footer_decoder(LZMA_HEADER_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)
{
	lzma_init();

	// Valid headers
	known_flags.backward_size = 1024;
	for (lzma_check_type check = LZMA_CHECK_NONE;
			check <= LZMA_CHECK_ID_MAX; ++check) {
		test_header();
		test_footer();
	}

	// Invalid headers
	test_encode_invalid();
	test_decode_invalid();

	return 0;
}