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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 | ||
20 | #include "compress.h" | |
21 | #include "util.h" | |
22 | #include "macro.h" | |
23 | ||
d89c8fdf ZJS |
24 | #ifdef HAVE_XZ |
25 | # define XZ_OK 0 | |
26 | #else | |
27 | # define XZ_OK -EPROTONOSUPPORT | |
28 | #endif | |
29 | ||
92261977 | 30 | #ifdef HAVE_LZ4 |
d89c8fdf ZJS |
31 | # define LZ4_OK 0 |
32 | #else | |
33 | # define LZ4_OK -EPROTONOSUPPORT | |
34 | #endif | |
35 | ||
36 | typedef int (compress_blob_t)(const void *src, uint64_t src_size, | |
fa1c4b51 | 37 | void *dst, size_t *dst_size); |
d89c8fdf | 38 | typedef int (decompress_blob_t)(const void *src, uint64_t src_size, |
fa1c4b51 ZJS |
39 | void **dst, size_t *dst_alloc_size, |
40 | size_t* dst_size, size_t dst_max); | |
d89c8fdf | 41 | typedef int (decompress_sw_t)(const void *src, uint64_t src_size, |
fa1c4b51 ZJS |
42 | void **buffer, size_t *buffer_size, |
43 | const void *prefix, size_t prefix_len, | |
d89c8fdf ZJS |
44 | uint8_t extra); |
45 | ||
46 | typedef int (compress_stream_t)(int fdf, int fdt, off_t max_bytes); | |
47 | typedef int (decompress_stream_t)(int fdf, int fdt, off_t max_size); | |
48 | ||
49 | static void test_compress_decompress(int compression, | |
50 | compress_blob_t compress, | |
c552d602 ZJS |
51 | decompress_blob_t decompress, |
52 | const char *data, | |
53 | size_t data_len, | |
54 | bool may_fail) { | |
843fecc0 | 55 | char compressed[512]; |
fa1c4b51 ZJS |
56 | size_t csize = 512; |
57 | size_t usize = 0; | |
d89c8fdf ZJS |
58 | _cleanup_free_ char *decompressed = NULL; |
59 | int r; | |
60 | ||
c552d602 ZJS |
61 | log_info("/* testing %s %s blob compression/decompression */", |
62 | object_compressed_to_string(compression), data); | |
63 | ||
64 | r = compress(data, data_len, compressed, &csize); | |
65 | if (r == -ENOBUFS) { | |
da927ba9 | 66 | log_info_errno(r, "compression failed: %m"); |
787784c4 | 67 | assert_se(may_fail); |
c552d602 | 68 | } else { |
787784c4 | 69 | assert_se(r == 0); |
c552d602 ZJS |
70 | r = decompress(compressed, csize, |
71 | (void **) &decompressed, &usize, &csize, 0); | |
787784c4 | 72 | assert_se(r == 0); |
c552d602 ZJS |
73 | assert_se(decompressed); |
74 | assert_se(memcmp(decompressed, data, data_len) == 0); | |
75 | } | |
d89c8fdf ZJS |
76 | |
77 | r = decompress("garbage", 7, | |
78 | (void **) &decompressed, &usize, &csize, 0); | |
787784c4 | 79 | assert_se(r < 0); |
d89c8fdf ZJS |
80 | |
81 | /* make sure to have the minimal lz4 compressed size */ | |
82 | r = decompress("00000000\1g", 9, | |
83 | (void **) &decompressed, &usize, &csize, 0); | |
787784c4 | 84 | assert_se(r < 0); |
d89c8fdf ZJS |
85 | |
86 | r = decompress("\100000000g", 9, | |
87 | (void **) &decompressed, &usize, &csize, 0); | |
787784c4 | 88 | assert_se(r < 0); |
d89c8fdf ZJS |
89 | |
90 | memzero(decompressed, usize); | |
843fecc0 RC |
91 | } |
92 | ||
d89c8fdf ZJS |
93 | static void test_decompress_startswith(int compression, |
94 | compress_blob_t compress, | |
c552d602 ZJS |
95 | decompress_sw_t decompress_sw, |
96 | const char *data, | |
97 | size_t data_len, | |
98 | bool may_fail) { | |
d89c8fdf | 99 | |
843fecc0 | 100 | char compressed[512]; |
fa1c4b51 ZJS |
101 | size_t csize = 512; |
102 | size_t usize = 0; | |
d89c8fdf | 103 | _cleanup_free_ char *decompressed = NULL; |
c552d602 | 104 | int r; |
d89c8fdf | 105 | |
c552d602 ZJS |
106 | log_info("/* testing decompress_startswith with %s on %s text*/", |
107 | object_compressed_to_string(compression), data); | |
108 | ||
109 | r = compress(data, data_len, compressed, &csize); | |
110 | if (r == -ENOBUFS) { | |
da927ba9 | 111 | log_info_errno(r, "compression failed: %m"); |
787784c4 | 112 | assert_se(may_fail); |
c552d602 ZJS |
113 | return; |
114 | } | |
787784c4 | 115 | assert_se(r == 0); |
d89c8fdf | 116 | |
d89c8fdf ZJS |
117 | assert_se(decompress_sw(compressed, |
118 | csize, | |
119 | (void **) &decompressed, | |
120 | &usize, | |
c552d602 | 121 | data, strlen(data), '\0') > 0); |
d89c8fdf ZJS |
122 | assert_se(decompress_sw(compressed, |
123 | csize, | |
124 | (void **) &decompressed, | |
125 | &usize, | |
c552d602 | 126 | data, strlen(data), 'w') == 0); |
d89c8fdf ZJS |
127 | assert_se(decompress_sw(compressed, |
128 | csize, | |
129 | (void **) &decompressed, | |
130 | &usize, | |
131 | "barbarbar", 9, ' ') == 0); | |
132 | assert_se(decompress_sw(compressed, | |
133 | csize, | |
134 | (void **) &decompressed, | |
135 | &usize, | |
c552d602 | 136 | data, strlen(data), '\0') > 0); |
843fecc0 RC |
137 | } |
138 | ||
d89c8fdf ZJS |
139 | static void test_compress_stream(int compression, |
140 | const char* cat, | |
141 | compress_stream_t compress, | |
142 | decompress_stream_t decompress, | |
143 | const char *srcfile) { | |
144 | ||
355b59e2 ZJS |
145 | _cleanup_close_ int src = -1, dst = -1, dst2 = -1; |
146 | char pattern[] = "/tmp/systemd-test.xz.XXXXXX", | |
147 | pattern2[] = "/tmp/systemd-test.xz.XXXXXX"; | |
148 | int r; | |
d89c8fdf | 149 | _cleanup_free_ char *cmd = NULL, *cmd2; |
355b59e2 ZJS |
150 | struct stat st = {}; |
151 | ||
d89c8fdf ZJS |
152 | log_debug("/* testing %s compression */", |
153 | object_compressed_to_string(compression)); | |
154 | ||
355b59e2 ZJS |
155 | log_debug("/* create source from %s */", srcfile); |
156 | ||
157 | assert_se((src = open(srcfile, O_RDONLY|O_CLOEXEC)) >= 0); | |
158 | ||
159 | log_debug("/* test compression */"); | |
160 | ||
161 | assert_se((dst = mkostemp_safe(pattern, O_RDWR|O_CLOEXEC)) >= 0); | |
162 | ||
52754725 | 163 | assert_se(compress(src, dst, -1) == 0); |
355b59e2 | 164 | |
d89c8fdf ZJS |
165 | if (cat) { |
166 | assert_se(asprintf(&cmd, "%s %s | diff %s -", cat, pattern, srcfile) > 0); | |
52754725 | 167 | assert_se(system(cmd) == 0); |
d89c8fdf | 168 | } |
355b59e2 ZJS |
169 | |
170 | log_debug("/* test decompression */"); | |
171 | ||
172 | assert_se((dst2 = mkostemp_safe(pattern2, O_RDWR|O_CLOEXEC)) >= 0); | |
173 | ||
174 | assert_se(stat(srcfile, &st) == 0); | |
175 | ||
176 | assert_se(lseek(dst, 0, SEEK_SET) == 0); | |
d89c8fdf | 177 | r = decompress(dst, dst2, st.st_size); |
0c0cdb06 | 178 | assert_se(r == 0); |
355b59e2 ZJS |
179 | |
180 | assert_se(asprintf(&cmd2, "diff %s %s", srcfile, pattern2) > 0); | |
181 | assert_se(system(cmd2) == 0); | |
182 | ||
183 | log_debug("/* test faulty decompression */"); | |
184 | ||
185 | assert_se(lseek(dst, 1, SEEK_SET) == 1); | |
d89c8fdf | 186 | r = decompress(dst, dst2, st.st_size); |
787784c4 | 187 | assert_se(r == -EBADMSG); |
355b59e2 ZJS |
188 | |
189 | assert_se(lseek(dst, 0, SEEK_SET) == 0); | |
190 | assert_se(lseek(dst2, 0, SEEK_SET) == 0); | |
d89c8fdf | 191 | r = decompress(dst, dst2, st.st_size - 1); |
0c0cdb06 | 192 | assert_se(r == -EFBIG); |
355b59e2 ZJS |
193 | |
194 | assert_se(unlink(pattern) == 0); | |
195 | assert_se(unlink(pattern2) == 0); | |
196 | } | |
197 | ||
843fecc0 | 198 | int main(int argc, char *argv[]) { |
c552d602 ZJS |
199 | const char text[] = |
200 | "text\0foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF" | |
201 | "foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF"; | |
202 | ||
203 | char data[512] = "random\0"; | |
355b59e2 ZJS |
204 | |
205 | log_set_max_level(LOG_DEBUG); | |
206 | ||
c552d602 ZJS |
207 | random_bytes(data + 7, sizeof(data) - 7); |
208 | ||
d89c8fdf | 209 | #ifdef HAVE_XZ |
c552d602 ZJS |
210 | test_compress_decompress(OBJECT_COMPRESSED_XZ, compress_blob_xz, decompress_blob_xz, |
211 | text, sizeof(text), false); | |
212 | test_compress_decompress(OBJECT_COMPRESSED_XZ, compress_blob_xz, decompress_blob_xz, | |
213 | data, sizeof(data), true); | |
214 | test_decompress_startswith(OBJECT_COMPRESSED_XZ, | |
215 | compress_blob_xz, decompress_startswith_xz, | |
216 | text, sizeof(text), false); | |
217 | test_decompress_startswith(OBJECT_COMPRESSED_XZ, | |
218 | compress_blob_xz, decompress_startswith_xz, | |
219 | data, sizeof(data), true); | |
d89c8fdf ZJS |
220 | test_compress_stream(OBJECT_COMPRESSED_XZ, "xzcat", |
221 | compress_stream_xz, decompress_stream_xz, argv[0]); | |
222 | #else | |
223 | log_info("/* XZ test skipped */"); | |
224 | #endif | |
c552d602 | 225 | |
d89c8fdf | 226 | #ifdef HAVE_LZ4 |
c552d602 ZJS |
227 | test_compress_decompress(OBJECT_COMPRESSED_LZ4, compress_blob_lz4, decompress_blob_lz4, |
228 | text, sizeof(text), false); | |
229 | test_compress_decompress(OBJECT_COMPRESSED_LZ4, compress_blob_lz4, decompress_blob_lz4, | |
230 | data, sizeof(data), true); | |
231 | test_decompress_startswith(OBJECT_COMPRESSED_LZ4, | |
232 | compress_blob_lz4, decompress_startswith_lz4, | |
233 | text, sizeof(text), false); | |
234 | test_decompress_startswith(OBJECT_COMPRESSED_LZ4, | |
235 | compress_blob_lz4, decompress_startswith_lz4, | |
236 | data, sizeof(data), true); | |
d89c8fdf ZJS |
237 | |
238 | /* Produced stream is not compatible with lz4 binary, skip lz4cat check. */ | |
239 | test_compress_stream(OBJECT_COMPRESSED_LZ4, NULL, | |
240 | compress_stream_lz4, decompress_stream_lz4, argv[0]); | |
241 | #else | |
242 | log_info("/* LZ4 test skipped */"); | |
243 | #endif | |
843fecc0 RC |
244 | |
245 | return 0; | |
246 | } |