1 /* SPDX-License-Identifier: LGPL-2.1+ */
9 #include "alloc-util.h"
14 #include "memory-util.h"
15 #include "path-util.h"
16 #include "random-util.h"
18 #include "tmpfile-util.h"
23 # define XZ_OK -EPROTONOSUPPORT
29 # define LZ4_OK -EPROTONOSUPPORT
32 #define HUGE_SIZE (4096*1024)
34 typedef int (compress_blob_t
)(const void *src
, uint64_t src_size
,
35 void *dst
, size_t dst_alloc_size
, size_t *dst_size
);
36 typedef int (decompress_blob_t
)(const void *src
, uint64_t src_size
,
37 void **dst
, size_t *dst_alloc_size
,
38 size_t* dst_size
, size_t dst_max
);
39 typedef int (decompress_sw_t
)(const void *src
, uint64_t src_size
,
40 void **buffer
, size_t *buffer_size
,
41 const void *prefix
, size_t prefix_len
,
44 typedef int (compress_stream_t
)(int fdf
, int fdt
, uint64_t max_bytes
);
45 typedef int (decompress_stream_t
)(int fdf
, int fdt
, uint64_t max_size
);
48 _unused_
static void test_compress_decompress(const char *compression
,
49 compress_blob_t compress
,
50 decompress_blob_t decompress
,
55 size_t csize
, usize
= 0;
56 _cleanup_free_
char *decompressed
= NULL
;
59 log_info("/* testing %s %s blob compression/decompression */",
62 r
= compress(data
, data_len
, compressed
, sizeof(compressed
), &csize
);
64 log_info_errno(r
, "compression failed: %m");
68 r
= decompress(compressed
, csize
,
69 (void **) &decompressed
, &usize
, &csize
, 0);
71 assert_se(decompressed
);
72 assert_se(memcmp(decompressed
, data
, data_len
) == 0);
75 r
= decompress("garbage", 7,
76 (void **) &decompressed
, &usize
, &csize
, 0);
79 /* make sure to have the minimal lz4 compressed size */
80 r
= decompress("00000000\1g", 9,
81 (void **) &decompressed
, &usize
, &csize
, 0);
84 r
= decompress("\100000000g", 9,
85 (void **) &decompressed
, &usize
, &csize
, 0);
88 memzero(decompressed
, usize
);
91 _unused_
static void test_decompress_startswith(const char *compression
,
92 compress_blob_t compress
,
93 decompress_sw_t decompress_sw
,
99 _cleanup_free_
char *compressed1
= NULL
, *compressed2
= NULL
, *decompressed
= NULL
;
100 size_t csize
, usize
= 0, len
;
103 log_info("/* testing decompress_startswith with %s on %.20s text */",
106 #define BUFSIZE_1 512
107 #define BUFSIZE_2 20000
109 compressed
= compressed1
= malloc(BUFSIZE_1
);
110 assert_se(compressed1
);
111 r
= compress(data
, data_len
, compressed
, BUFSIZE_1
, &csize
);
113 log_info_errno(r
, "compression failed: %m");
116 compressed
= compressed2
= malloc(BUFSIZE_2
);
117 assert_se(compressed2
);
118 r
= compress(data
, data_len
, compressed
, BUFSIZE_2
, &csize
);
125 r
= decompress_sw(compressed
, csize
, (void **) &decompressed
, &usize
, data
, len
, '\0');
127 r
= decompress_sw(compressed
, csize
, (void **) &decompressed
, &usize
, data
, len
, 'w');
129 r
= decompress_sw(compressed
, csize
, (void **) &decompressed
, &usize
, "barbarbar", 9, ' ');
131 r
= decompress_sw(compressed
, csize
, (void **) &decompressed
, &usize
, data
, len
- 1, data
[len
-1]);
133 r
= decompress_sw(compressed
, csize
, (void **) &decompressed
, &usize
, data
, len
- 1, 'w');
135 r
= decompress_sw(compressed
, csize
, (void **) &decompressed
, &usize
, data
, len
, '\0');
139 _unused_
static void test_decompress_startswith_short(const char *compression
,
140 compress_blob_t compress
,
141 decompress_sw_t decompress_sw
) {
143 #define TEXT "HUGE=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
149 log_info("/* %s with %s */", __func__
, compression
);
151 r
= compress(TEXT
, sizeof TEXT
, buf
, sizeof buf
, &csize
);
154 for (i
= 1; i
< strlen(TEXT
); i
++) {
155 size_t alloc_size
= i
;
156 _cleanup_free_
void *buf2
= NULL
;
158 assert_se(buf2
= malloc(i
));
160 assert_se(decompress_sw(buf
, csize
, &buf2
, &alloc_size
, TEXT
, i
, TEXT
[i
]) == 1);
161 assert_se(decompress_sw(buf
, csize
, &buf2
, &alloc_size
, TEXT
, i
, 'y') == 0);
165 _unused_
static void test_compress_stream(const char *compression
,
167 compress_stream_t compress
,
168 decompress_stream_t decompress
,
169 const char *srcfile
) {
171 _cleanup_close_
int src
= -1, dst
= -1, dst2
= -1;
172 _cleanup_(unlink_tempfilep
) char
173 pattern
[] = "/tmp/systemd-test.compressed.XXXXXX",
174 pattern2
[] = "/tmp/systemd-test.compressed.XXXXXX";
176 _cleanup_free_
char *cmd
= NULL
, *cmd2
= NULL
;
179 r
= find_binary(cat
, NULL
);
181 log_error_errno(r
, "Skipping %s, could not find %s binary: %m", __func__
, cat
);
185 log_debug("/* testing %s compression */", compression
);
187 log_debug("/* create source from %s */", srcfile
);
189 assert_se((src
= open(srcfile
, O_RDONLY
|O_CLOEXEC
)) >= 0);
191 log_debug("/* test compression */");
193 assert_se((dst
= mkostemp_safe(pattern
)) >= 0);
195 assert_se(compress(src
, dst
, -1) == 0);
198 assert_se(asprintf(&cmd
, "%s %s | diff %s -", cat
, pattern
, srcfile
) > 0);
199 assert_se(system(cmd
) == 0);
202 log_debug("/* test decompression */");
204 assert_se((dst2
= mkostemp_safe(pattern2
)) >= 0);
206 assert_se(stat(srcfile
, &st
) == 0);
208 assert_se(lseek(dst
, 0, SEEK_SET
) == 0);
209 r
= decompress(dst
, dst2
, st
.st_size
);
212 assert_se(asprintf(&cmd2
, "diff %s %s", srcfile
, pattern2
) > 0);
213 assert_se(system(cmd2
) == 0);
215 log_debug("/* test faulty decompression */");
217 assert_se(lseek(dst
, 1, SEEK_SET
) == 1);
218 r
= decompress(dst
, dst2
, st
.st_size
);
219 assert_se(IN_SET(r
, 0, -EBADMSG
));
221 assert_se(lseek(dst
, 0, SEEK_SET
) == 0);
222 assert_se(lseek(dst2
, 0, SEEK_SET
) == 0);
223 r
= decompress(dst
, dst2
, st
.st_size
- 1);
224 assert_se(r
== -EFBIG
);
229 static void test_lz4_decompress_partial(void) {
230 char buf
[20000], buf2
[100];
231 size_t buf_size
= sizeof(buf
), compressed
;
233 _cleanup_free_
char *huge
= NULL
;
235 log_debug("/* %s */", __func__
);
237 assert_se(huge
= malloc(HUGE_SIZE
));
238 memcpy(huge
, "HUGE=", STRLEN("HUGE="));
239 memset(&huge
[STRLEN("HUGE=")], 'x', HUGE_SIZE
- STRLEN("HUGE=") - 1);
240 huge
[HUGE_SIZE
- 1] = '\0';
242 r
= LZ4_compress_default(huge
, buf
, HUGE_SIZE
, buf_size
);
245 log_info("Compressed %i → %zu", HUGE_SIZE
, compressed
);
247 r
= LZ4_decompress_safe(buf
, huge
, r
, HUGE_SIZE
);
249 log_info("Decompressed → %i", r
);
251 r
= LZ4_decompress_safe_partial(buf
, huge
,
255 log_info("Decompressed partial %i/%i → %i", 12, HUGE_SIZE
, r
);
257 for (size_t size
= 1; size
< sizeof(buf2
); size
++) {
258 /* This failed in older lz4s but works in newer ones. */
259 r
= LZ4_decompress_safe_partial(buf
, buf2
, compressed
, size
, size
);
260 log_info("Decompressed partial %zu/%zu → %i (%s)", size
, size
, r
,
261 r
< 0 ? "bad" : "good");
262 if (r
>= 0 && LZ4_versionNumber() >= 10803)
263 /* lz4 <= 1.8.2 should fail that test, let's only check for newer ones */
264 assert_se(memcmp(buf2
, huge
, r
) == 0);
269 int main(int argc
, char *argv
[]) {
271 _unused_
const char text
[] =
272 "text\0foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF"
273 "foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF";
275 /* The file to test compression on can be specified as the first argument */
276 const char *srcfile
= argc
> 1 ? argv
[1] : argv
[0];
278 char data
[512] = "random\0";
280 _cleanup_free_
char *huge
= NULL
;
282 assert_se(huge
= malloc(HUGE_SIZE
));
283 memcpy(huge
, "HUGE=", STRLEN("HUGE="));
284 memset(&huge
[STRLEN("HUGE=")], 'x', HUGE_SIZE
- STRLEN("HUGE=") - 1);
285 huge
[HUGE_SIZE
- 1] = '\0';
287 test_setup_logging(LOG_DEBUG
);
289 random_bytes(data
+ 7, sizeof(data
) - 7);
292 test_compress_decompress("XZ", compress_blob_xz
, decompress_blob_xz
,
293 text
, sizeof(text
), false);
294 test_compress_decompress("XZ", compress_blob_xz
, decompress_blob_xz
,
295 data
, sizeof(data
), true);
297 test_decompress_startswith("XZ",
298 compress_blob_xz
, decompress_startswith_xz
,
299 text
, sizeof(text
), false);
300 test_decompress_startswith("XZ",
301 compress_blob_xz
, decompress_startswith_xz
,
302 data
, sizeof(data
), true);
303 test_decompress_startswith("XZ",
304 compress_blob_xz
, decompress_startswith_xz
,
305 huge
, HUGE_SIZE
, true);
307 test_compress_stream("XZ", "xzcat",
308 compress_stream_xz
, decompress_stream_xz
, srcfile
);
310 test_decompress_startswith_short("XZ", compress_blob_xz
, decompress_startswith_xz
);
313 log_info("/* XZ test skipped */");
317 test_compress_decompress("LZ4", compress_blob_lz4
, decompress_blob_lz4
,
318 text
, sizeof(text
), false);
319 test_compress_decompress("LZ4", compress_blob_lz4
, decompress_blob_lz4
,
320 data
, sizeof(data
), true);
322 test_decompress_startswith("LZ4",
323 compress_blob_lz4
, decompress_startswith_lz4
,
324 text
, sizeof(text
), false);
325 test_decompress_startswith("LZ4",
326 compress_blob_lz4
, decompress_startswith_lz4
,
327 data
, sizeof(data
), true);
328 test_decompress_startswith("LZ4",
329 compress_blob_lz4
, decompress_startswith_lz4
,
330 huge
, HUGE_SIZE
, true);
332 test_compress_stream("LZ4", "lz4cat",
333 compress_stream_lz4
, decompress_stream_lz4
, srcfile
);
335 test_lz4_decompress_partial();
337 test_decompress_startswith_short("LZ4", compress_blob_lz4
, decompress_startswith_lz4
);
340 log_info("/* LZ4 test skipped */");
344 test_compress_decompress("ZSTD", compress_blob_zstd
, decompress_blob_zstd
,
345 text
, sizeof(text
), false);
346 test_compress_decompress("ZSTD", compress_blob_zstd
, decompress_blob_zstd
,
347 data
, sizeof(data
), true);
349 test_decompress_startswith("ZSTD",
350 compress_blob_zstd
, decompress_startswith_zstd
,
351 text
, sizeof(text
), false);
352 test_decompress_startswith("ZSTD",
353 compress_blob_zstd
, decompress_startswith_zstd
,
354 data
, sizeof(data
), true);
355 test_decompress_startswith("ZSTD",
356 compress_blob_zstd
, decompress_startswith_zstd
,
357 huge
, HUGE_SIZE
, true);
359 test_compress_stream("ZSTD", "zstdcat",
360 compress_stream_zstd
, decompress_stream_zstd
, srcfile
);
362 test_decompress_startswith_short("ZSTD", compress_blob_zstd
, decompress_startswith_zstd
);
364 log_info("/* ZSTD test skipped */");
369 log_info("/* XZ, LZ4 and ZSTD tests skipped */");
370 return EXIT_TEST_SKIP
;