1 /* test_inflate_sync.cc - Test inflateSync using full flush deflate and corrupted data */
2
3 #include "zbuild.h"
4 #ifdef ZLIB_COMPAT
5 # include "zlib.h"
6 #else
7 # include "zlib-ng.h"
8 #endif
9
10 #include <stdio.h>
11 #include <stdint.h>
12 #include <stdlib.h>
13 #include <string.h>
14
15 #include "test_shared.h"
16
17 #include <gtest/gtest.h>
18
TEST(inflate,sync)19 TEST(inflate, sync) {
20 PREFIX3(stream) c_stream, d_stream;
21 uint8_t compr[128], uncompr[128];
22 z_size_t compr_len = sizeof(compr), uncompr_len = sizeof(uncompr);
23 int err;
24
25 memset(&c_stream, 0, sizeof(c_stream));
26
27 /* build compressed stream with full flush */
28 err = PREFIX(deflateInit)(&c_stream, Z_DEFAULT_COMPRESSION);
29 EXPECT_EQ(err, Z_OK);
30
31 c_stream.next_in = (z_const unsigned char *)hello;
32 c_stream.next_out = compr;
33 c_stream.avail_in = 3;
34 c_stream.avail_out = (uint32_t)compr_len;
35
36 err = PREFIX(deflate)(&c_stream, Z_FULL_FLUSH);
37 EXPECT_EQ(err, Z_OK);
38
39 /* force an error in first compressed block */
40 compr[3]++;
41 c_stream.avail_in = hello_len-3;
42
43 err = PREFIX(deflate)(&c_stream, Z_FINISH);
44 EXPECT_EQ(err, Z_STREAM_END);
45
46 err = PREFIX(deflateEnd)(&c_stream);
47 EXPECT_EQ(err, Z_OK);
48
49 compr_len = (z_size_t)c_stream.total_out;
50
51 memset(&d_stream, 0, sizeof(d_stream));
52 /* just read the zlib header */
53 d_stream.next_in = compr;
54 d_stream.avail_in = 2;
55
56 err = PREFIX(inflateInit)(&d_stream);
57 EXPECT_EQ(err, Z_OK);
58
59 d_stream.next_out = uncompr;
60 d_stream.avail_out = (uint32_t)uncompr_len;
61
62 err = PREFIX(inflate)(&d_stream, Z_NO_FLUSH);
63 EXPECT_EQ(err, Z_OK);
64
65 /* read all compressed data, but skip damaged part */
66 d_stream.avail_in = (uint32_t)compr_len-2;
67 err = PREFIX(inflateSync)(&d_stream);
68 EXPECT_EQ(err, Z_OK);
69
70 err = PREFIX(inflate)(&d_stream, Z_FINISH);
71 EXPECT_EQ(err, Z_STREAM_END);
72
73 err = PREFIX(inflateEnd)(&d_stream);
74 EXPECT_EQ(err, Z_OK);
75 }
76