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843fecc0 RC |
1 | /*** |
2 | This file is part of systemd | |
3 | ||
4 | Copyright 2014 Ronny Chevalier | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
e3cc7fc4 ZJS |
20 | #ifdef HAVE_LZ4 |
21 | #include <lz4.h> | |
22 | #endif | |
23 | ||
b5efdb8a | 24 | #include "alloc-util.h" |
843fecc0 | 25 | #include "compress.h" |
3ffd4af2 | 26 | #include "fd-util.h" |
0d39fa9c | 27 | #include "fileio.h" |
843fecc0 | 28 | #include "macro.h" |
3df3e884 | 29 | #include "random-util.h" |
3ffd4af2 | 30 | #include "util.h" |
843fecc0 | 31 | |
d89c8fdf ZJS |
32 | #ifdef HAVE_XZ |
33 | # define XZ_OK 0 | |
34 | #else | |
35 | # define XZ_OK -EPROTONOSUPPORT | |
36 | #endif | |
37 | ||
92261977 | 38 | #ifdef HAVE_LZ4 |
d89c8fdf ZJS |
39 | # define LZ4_OK 0 |
40 | #else | |
41 | # define LZ4_OK -EPROTONOSUPPORT | |
42 | #endif | |
43 | ||
44 | typedef int (compress_blob_t)(const void *src, uint64_t src_size, | |
5d6f46b6 | 45 | void *dst, size_t dst_alloc_size, size_t *dst_size); |
d89c8fdf | 46 | typedef int (decompress_blob_t)(const void *src, uint64_t src_size, |
fa1c4b51 ZJS |
47 | void **dst, size_t *dst_alloc_size, |
48 | size_t* dst_size, size_t dst_max); | |
d89c8fdf | 49 | typedef int (decompress_sw_t)(const void *src, uint64_t src_size, |
fa1c4b51 ZJS |
50 | void **buffer, size_t *buffer_size, |
51 | const void *prefix, size_t prefix_len, | |
d89c8fdf ZJS |
52 | uint8_t extra); |
53 | ||
59f448cf LP |
54 | typedef int (compress_stream_t)(int fdf, int fdt, uint64_t max_bytes); |
55 | typedef int (decompress_stream_t)(int fdf, int fdt, uint64_t max_size); | |
d89c8fdf ZJS |
56 | |
57 | static void test_compress_decompress(int compression, | |
58 | compress_blob_t compress, | |
c552d602 ZJS |
59 | decompress_blob_t decompress, |
60 | const char *data, | |
61 | size_t data_len, | |
62 | bool may_fail) { | |
843fecc0 | 63 | char compressed[512]; |
5d6f46b6 | 64 | size_t csize, usize = 0; |
d89c8fdf ZJS |
65 | _cleanup_free_ char *decompressed = NULL; |
66 | int r; | |
67 | ||
c552d602 ZJS |
68 | log_info("/* testing %s %s blob compression/decompression */", |
69 | object_compressed_to_string(compression), data); | |
70 | ||
5d6f46b6 | 71 | r = compress(data, data_len, compressed, sizeof(compressed), &csize); |
c552d602 | 72 | if (r == -ENOBUFS) { |
da927ba9 | 73 | log_info_errno(r, "compression failed: %m"); |
787784c4 | 74 | assert_se(may_fail); |
c552d602 | 75 | } else { |
787784c4 | 76 | assert_se(r == 0); |
c552d602 ZJS |
77 | r = decompress(compressed, csize, |
78 | (void **) &decompressed, &usize, &csize, 0); | |
787784c4 | 79 | assert_se(r == 0); |
c552d602 ZJS |
80 | assert_se(decompressed); |
81 | assert_se(memcmp(decompressed, data, data_len) == 0); | |
82 | } | |
d89c8fdf ZJS |
83 | |
84 | r = decompress("garbage", 7, | |
85 | (void **) &decompressed, &usize, &csize, 0); | |
787784c4 | 86 | assert_se(r < 0); |
d89c8fdf ZJS |
87 | |
88 | /* make sure to have the minimal lz4 compressed size */ | |
89 | r = decompress("00000000\1g", 9, | |
90 | (void **) &decompressed, &usize, &csize, 0); | |
787784c4 | 91 | assert_se(r < 0); |
d89c8fdf ZJS |
92 | |
93 | r = decompress("\100000000g", 9, | |
94 | (void **) &decompressed, &usize, &csize, 0); | |
787784c4 | 95 | assert_se(r < 0); |
d89c8fdf ZJS |
96 | |
97 | memzero(decompressed, usize); | |
843fecc0 RC |
98 | } |
99 | ||
d89c8fdf ZJS |
100 | static void test_decompress_startswith(int compression, |
101 | compress_blob_t compress, | |
c552d602 ZJS |
102 | decompress_sw_t decompress_sw, |
103 | const char *data, | |
104 | size_t data_len, | |
105 | bool may_fail) { | |
d89c8fdf | 106 | |
843fecc0 | 107 | char compressed[512]; |
5d6f46b6 | 108 | size_t csize, usize = 0; |
d89c8fdf | 109 | _cleanup_free_ char *decompressed = NULL; |
c552d602 | 110 | int r; |
d89c8fdf | 111 | |
c552d602 ZJS |
112 | log_info("/* testing decompress_startswith with %s on %s text*/", |
113 | object_compressed_to_string(compression), data); | |
114 | ||
5d6f46b6 | 115 | r = compress(data, data_len, compressed, sizeof(compressed), &csize); |
c552d602 | 116 | if (r == -ENOBUFS) { |
da927ba9 | 117 | log_info_errno(r, "compression failed: %m"); |
787784c4 | 118 | assert_se(may_fail); |
c552d602 ZJS |
119 | return; |
120 | } | |
787784c4 | 121 | assert_se(r == 0); |
d89c8fdf | 122 | |
d89c8fdf ZJS |
123 | assert_se(decompress_sw(compressed, |
124 | csize, | |
125 | (void **) &decompressed, | |
126 | &usize, | |
c552d602 | 127 | data, strlen(data), '\0') > 0); |
d89c8fdf ZJS |
128 | assert_se(decompress_sw(compressed, |
129 | csize, | |
130 | (void **) &decompressed, | |
131 | &usize, | |
c552d602 | 132 | data, strlen(data), 'w') == 0); |
d89c8fdf ZJS |
133 | assert_se(decompress_sw(compressed, |
134 | csize, | |
135 | (void **) &decompressed, | |
136 | &usize, | |
137 | "barbarbar", 9, ' ') == 0); | |
138 | assert_se(decompress_sw(compressed, | |
139 | csize, | |
140 | (void **) &decompressed, | |
141 | &usize, | |
c552d602 | 142 | data, strlen(data), '\0') > 0); |
843fecc0 RC |
143 | } |
144 | ||
d89c8fdf ZJS |
145 | static void test_compress_stream(int compression, |
146 | const char* cat, | |
147 | compress_stream_t compress, | |
148 | decompress_stream_t decompress, | |
149 | const char *srcfile) { | |
150 | ||
355b59e2 | 151 | _cleanup_close_ int src = -1, dst = -1, dst2 = -1; |
4b5bc539 ZJS |
152 | char pattern[] = "/tmp/systemd-test.compressed.XXXXXX", |
153 | pattern2[] = "/tmp/systemd-test.compressed.XXXXXX"; | |
355b59e2 | 154 | int r; |
d89c8fdf | 155 | _cleanup_free_ char *cmd = NULL, *cmd2; |
355b59e2 ZJS |
156 | struct stat st = {}; |
157 | ||
d89c8fdf ZJS |
158 | log_debug("/* testing %s compression */", |
159 | object_compressed_to_string(compression)); | |
160 | ||
355b59e2 ZJS |
161 | log_debug("/* create source from %s */", srcfile); |
162 | ||
163 | assert_se((src = open(srcfile, O_RDONLY|O_CLOEXEC)) >= 0); | |
164 | ||
165 | log_debug("/* test compression */"); | |
166 | ||
167 | assert_se((dst = mkostemp_safe(pattern, O_RDWR|O_CLOEXEC)) >= 0); | |
168 | ||
52754725 | 169 | assert_se(compress(src, dst, -1) == 0); |
355b59e2 | 170 | |
d89c8fdf ZJS |
171 | if (cat) { |
172 | assert_se(asprintf(&cmd, "%s %s | diff %s -", cat, pattern, srcfile) > 0); | |
52754725 | 173 | assert_se(system(cmd) == 0); |
d89c8fdf | 174 | } |
355b59e2 ZJS |
175 | |
176 | log_debug("/* test decompression */"); | |
177 | ||
178 | assert_se((dst2 = mkostemp_safe(pattern2, O_RDWR|O_CLOEXEC)) >= 0); | |
179 | ||
180 | assert_se(stat(srcfile, &st) == 0); | |
181 | ||
182 | assert_se(lseek(dst, 0, SEEK_SET) == 0); | |
d89c8fdf | 183 | r = decompress(dst, dst2, st.st_size); |
0c0cdb06 | 184 | assert_se(r == 0); |
355b59e2 ZJS |
185 | |
186 | assert_se(asprintf(&cmd2, "diff %s %s", srcfile, pattern2) > 0); | |
187 | assert_se(system(cmd2) == 0); | |
188 | ||
189 | log_debug("/* test faulty decompression */"); | |
190 | ||
191 | assert_se(lseek(dst, 1, SEEK_SET) == 1); | |
d89c8fdf | 192 | r = decompress(dst, dst2, st.st_size); |
4b5bc539 | 193 | assert_se(r == -EBADMSG || r == 0); |
355b59e2 ZJS |
194 | |
195 | assert_se(lseek(dst, 0, SEEK_SET) == 0); | |
196 | assert_se(lseek(dst2, 0, SEEK_SET) == 0); | |
d89c8fdf | 197 | r = decompress(dst, dst2, st.st_size - 1); |
0c0cdb06 | 198 | assert_se(r == -EFBIG); |
355b59e2 ZJS |
199 | |
200 | assert_se(unlink(pattern) == 0); | |
201 | assert_se(unlink(pattern2) == 0); | |
202 | } | |
203 | ||
e3cc7fc4 ZJS |
204 | #ifdef HAVE_LZ4 |
205 | static void test_lz4_decompress_partial(void) { | |
206 | char buf[20000]; | |
207 | size_t buf_size = sizeof(buf), compressed; | |
208 | int r; | |
209 | ||
210 | char huge[4096*1024]; | |
211 | memset(huge, 'x', sizeof(huge)); | |
212 | memcpy(huge, "HUGE=", 5); | |
213 | ||
214 | r = LZ4_compress_limitedOutput(huge, buf, sizeof(huge), buf_size); | |
215 | assert_se(r >= 0); | |
216 | compressed = r; | |
217 | log_info("Compressed %zu → %zu", sizeof(huge), compressed); | |
218 | ||
219 | r = LZ4_decompress_safe(buf, huge, r, sizeof(huge)); | |
220 | assert_se(r >= 0); | |
221 | log_info("Decompressed → %i", r); | |
222 | ||
223 | r = LZ4_decompress_safe_partial(buf, huge, | |
224 | compressed, | |
225 | 12, (int) sizeof(huge)); | |
226 | assert_se(r >= 0); | |
227 | log_info("Decompressed partial %i/%zu → %i", 12, sizeof(huge), r); | |
228 | ||
229 | /* We expect this to fail, because that's how current lz4 works. If this | |
230 | * call succeeds, then lz4 has been fixed, and we need to change our code. | |
231 | */ | |
232 | r = LZ4_decompress_safe_partial(buf, huge, | |
233 | compressed, | |
234 | 12, (int) sizeof(huge) - 1); | |
235 | assert_se(r < 0); | |
236 | log_info("Decompressed partial %i/%zu → %i", 12, sizeof(huge), r); | |
237 | } | |
238 | #endif | |
239 | ||
843fecc0 | 240 | int main(int argc, char *argv[]) { |
c552d602 ZJS |
241 | const char text[] = |
242 | "text\0foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF" | |
243 | "foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF"; | |
244 | ||
245 | char data[512] = "random\0"; | |
355b59e2 ZJS |
246 | |
247 | log_set_max_level(LOG_DEBUG); | |
248 | ||
c552d602 ZJS |
249 | random_bytes(data + 7, sizeof(data) - 7); |
250 | ||
d89c8fdf | 251 | #ifdef HAVE_XZ |
c552d602 ZJS |
252 | test_compress_decompress(OBJECT_COMPRESSED_XZ, compress_blob_xz, decompress_blob_xz, |
253 | text, sizeof(text), false); | |
254 | test_compress_decompress(OBJECT_COMPRESSED_XZ, compress_blob_xz, decompress_blob_xz, | |
255 | data, sizeof(data), true); | |
256 | test_decompress_startswith(OBJECT_COMPRESSED_XZ, | |
257 | compress_blob_xz, decompress_startswith_xz, | |
258 | text, sizeof(text), false); | |
259 | test_decompress_startswith(OBJECT_COMPRESSED_XZ, | |
260 | compress_blob_xz, decompress_startswith_xz, | |
261 | data, sizeof(data), true); | |
d89c8fdf ZJS |
262 | test_compress_stream(OBJECT_COMPRESSED_XZ, "xzcat", |
263 | compress_stream_xz, decompress_stream_xz, argv[0]); | |
264 | #else | |
265 | log_info("/* XZ test skipped */"); | |
266 | #endif | |
c552d602 | 267 | |
d89c8fdf | 268 | #ifdef HAVE_LZ4 |
c552d602 ZJS |
269 | test_compress_decompress(OBJECT_COMPRESSED_LZ4, compress_blob_lz4, decompress_blob_lz4, |
270 | text, sizeof(text), false); | |
271 | test_compress_decompress(OBJECT_COMPRESSED_LZ4, compress_blob_lz4, decompress_blob_lz4, | |
272 | data, sizeof(data), true); | |
273 | test_decompress_startswith(OBJECT_COMPRESSED_LZ4, | |
274 | compress_blob_lz4, decompress_startswith_lz4, | |
275 | text, sizeof(text), false); | |
276 | test_decompress_startswith(OBJECT_COMPRESSED_LZ4, | |
277 | compress_blob_lz4, decompress_startswith_lz4, | |
278 | data, sizeof(data), true); | |
d89c8fdf | 279 | |
4b5bc539 | 280 | test_compress_stream(OBJECT_COMPRESSED_LZ4, "lz4cat", |
d89c8fdf | 281 | compress_stream_lz4, decompress_stream_lz4, argv[0]); |
e3cc7fc4 ZJS |
282 | |
283 | test_lz4_decompress_partial(); | |
d89c8fdf ZJS |
284 | #else |
285 | log_info("/* LZ4 test skipped */"); | |
286 | #endif | |
843fecc0 RC |
287 | |
288 | return 0; | |
289 | } |