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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" | |
3df3e884 | 23 | #include "random-util.h" |
843fecc0 | 24 | |
d89c8fdf ZJS |
25 | #ifdef HAVE_XZ |
26 | # define XZ_OK 0 | |
27 | #else | |
28 | # define XZ_OK -EPROTONOSUPPORT | |
29 | #endif | |
30 | ||
92261977 | 31 | #ifdef HAVE_LZ4 |
d89c8fdf ZJS |
32 | # define LZ4_OK 0 |
33 | #else | |
34 | # define LZ4_OK -EPROTONOSUPPORT | |
35 | #endif | |
36 | ||
37 | typedef int (compress_blob_t)(const void *src, uint64_t src_size, | |
fa1c4b51 | 38 | void *dst, size_t *dst_size); |
d89c8fdf | 39 | typedef int (decompress_blob_t)(const void *src, uint64_t src_size, |
fa1c4b51 ZJS |
40 | void **dst, size_t *dst_alloc_size, |
41 | size_t* dst_size, size_t dst_max); | |
d89c8fdf | 42 | typedef int (decompress_sw_t)(const void *src, uint64_t src_size, |
fa1c4b51 ZJS |
43 | void **buffer, size_t *buffer_size, |
44 | const void *prefix, size_t prefix_len, | |
d89c8fdf ZJS |
45 | uint8_t extra); |
46 | ||
47 | typedef int (compress_stream_t)(int fdf, int fdt, off_t max_bytes); | |
48 | typedef int (decompress_stream_t)(int fdf, int fdt, off_t max_size); | |
49 | ||
50 | static void test_compress_decompress(int compression, | |
51 | compress_blob_t compress, | |
c552d602 ZJS |
52 | decompress_blob_t decompress, |
53 | const char *data, | |
54 | size_t data_len, | |
55 | bool may_fail) { | |
843fecc0 | 56 | char compressed[512]; |
fa1c4b51 ZJS |
57 | size_t csize = 512; |
58 | size_t usize = 0; | |
d89c8fdf ZJS |
59 | _cleanup_free_ char *decompressed = NULL; |
60 | int r; | |
61 | ||
c552d602 ZJS |
62 | log_info("/* testing %s %s blob compression/decompression */", |
63 | object_compressed_to_string(compression), data); | |
64 | ||
65 | r = compress(data, data_len, compressed, &csize); | |
66 | if (r == -ENOBUFS) { | |
da927ba9 | 67 | log_info_errno(r, "compression failed: %m"); |
787784c4 | 68 | assert_se(may_fail); |
c552d602 | 69 | } else { |
787784c4 | 70 | assert_se(r == 0); |
c552d602 ZJS |
71 | r = decompress(compressed, csize, |
72 | (void **) &decompressed, &usize, &csize, 0); | |
787784c4 | 73 | assert_se(r == 0); |
c552d602 ZJS |
74 | assert_se(decompressed); |
75 | assert_se(memcmp(decompressed, data, data_len) == 0); | |
76 | } | |
d89c8fdf ZJS |
77 | |
78 | r = decompress("garbage", 7, | |
79 | (void **) &decompressed, &usize, &csize, 0); | |
787784c4 | 80 | assert_se(r < 0); |
d89c8fdf ZJS |
81 | |
82 | /* make sure to have the minimal lz4 compressed size */ | |
83 | r = decompress("00000000\1g", 9, | |
84 | (void **) &decompressed, &usize, &csize, 0); | |
787784c4 | 85 | assert_se(r < 0); |
d89c8fdf ZJS |
86 | |
87 | r = decompress("\100000000g", 9, | |
88 | (void **) &decompressed, &usize, &csize, 0); | |
787784c4 | 89 | assert_se(r < 0); |
d89c8fdf ZJS |
90 | |
91 | memzero(decompressed, usize); | |
843fecc0 RC |
92 | } |
93 | ||
d89c8fdf ZJS |
94 | static void test_decompress_startswith(int compression, |
95 | compress_blob_t compress, | |
c552d602 ZJS |
96 | decompress_sw_t decompress_sw, |
97 | const char *data, | |
98 | size_t data_len, | |
99 | bool may_fail) { | |
d89c8fdf | 100 | |
843fecc0 | 101 | char compressed[512]; |
fa1c4b51 ZJS |
102 | size_t csize = 512; |
103 | size_t usize = 0; | |
d89c8fdf | 104 | _cleanup_free_ char *decompressed = NULL; |
c552d602 | 105 | int r; |
d89c8fdf | 106 | |
c552d602 ZJS |
107 | log_info("/* testing decompress_startswith with %s on %s text*/", |
108 | object_compressed_to_string(compression), data); | |
109 | ||
110 | r = compress(data, data_len, compressed, &csize); | |
111 | if (r == -ENOBUFS) { | |
da927ba9 | 112 | log_info_errno(r, "compression failed: %m"); |
787784c4 | 113 | assert_se(may_fail); |
c552d602 ZJS |
114 | return; |
115 | } | |
787784c4 | 116 | assert_se(r == 0); |
d89c8fdf | 117 | |
d89c8fdf ZJS |
118 | assert_se(decompress_sw(compressed, |
119 | csize, | |
120 | (void **) &decompressed, | |
121 | &usize, | |
c552d602 | 122 | data, strlen(data), '\0') > 0); |
d89c8fdf ZJS |
123 | assert_se(decompress_sw(compressed, |
124 | csize, | |
125 | (void **) &decompressed, | |
126 | &usize, | |
c552d602 | 127 | data, strlen(data), 'w') == 0); |
d89c8fdf ZJS |
128 | assert_se(decompress_sw(compressed, |
129 | csize, | |
130 | (void **) &decompressed, | |
131 | &usize, | |
132 | "barbarbar", 9, ' ') == 0); | |
133 | assert_se(decompress_sw(compressed, | |
134 | csize, | |
135 | (void **) &decompressed, | |
136 | &usize, | |
c552d602 | 137 | data, strlen(data), '\0') > 0); |
843fecc0 RC |
138 | } |
139 | ||
d89c8fdf ZJS |
140 | static void test_compress_stream(int compression, |
141 | const char* cat, | |
142 | compress_stream_t compress, | |
143 | decompress_stream_t decompress, | |
144 | const char *srcfile) { | |
145 | ||
355b59e2 ZJS |
146 | _cleanup_close_ int src = -1, dst = -1, dst2 = -1; |
147 | char pattern[] = "/tmp/systemd-test.xz.XXXXXX", | |
148 | pattern2[] = "/tmp/systemd-test.xz.XXXXXX"; | |
149 | int r; | |
d89c8fdf | 150 | _cleanup_free_ char *cmd = NULL, *cmd2; |
355b59e2 ZJS |
151 | struct stat st = {}; |
152 | ||
d89c8fdf ZJS |
153 | log_debug("/* testing %s compression */", |
154 | object_compressed_to_string(compression)); | |
155 | ||
355b59e2 ZJS |
156 | log_debug("/* create source from %s */", srcfile); |
157 | ||
158 | assert_se((src = open(srcfile, O_RDONLY|O_CLOEXEC)) >= 0); | |
159 | ||
160 | log_debug("/* test compression */"); | |
161 | ||
162 | assert_se((dst = mkostemp_safe(pattern, O_RDWR|O_CLOEXEC)) >= 0); | |
163 | ||
52754725 | 164 | assert_se(compress(src, dst, -1) == 0); |
355b59e2 | 165 | |
d89c8fdf ZJS |
166 | if (cat) { |
167 | assert_se(asprintf(&cmd, "%s %s | diff %s -", cat, pattern, srcfile) > 0); | |
52754725 | 168 | assert_se(system(cmd) == 0); |
d89c8fdf | 169 | } |
355b59e2 ZJS |
170 | |
171 | log_debug("/* test decompression */"); | |
172 | ||
173 | assert_se((dst2 = mkostemp_safe(pattern2, O_RDWR|O_CLOEXEC)) >= 0); | |
174 | ||
175 | assert_se(stat(srcfile, &st) == 0); | |
176 | ||
177 | assert_se(lseek(dst, 0, SEEK_SET) == 0); | |
d89c8fdf | 178 | r = decompress(dst, dst2, st.st_size); |
0c0cdb06 | 179 | assert_se(r == 0); |
355b59e2 ZJS |
180 | |
181 | assert_se(asprintf(&cmd2, "diff %s %s", srcfile, pattern2) > 0); | |
182 | assert_se(system(cmd2) == 0); | |
183 | ||
184 | log_debug("/* test faulty decompression */"); | |
185 | ||
186 | assert_se(lseek(dst, 1, SEEK_SET) == 1); | |
d89c8fdf | 187 | r = decompress(dst, dst2, st.st_size); |
787784c4 | 188 | assert_se(r == -EBADMSG); |
355b59e2 ZJS |
189 | |
190 | assert_se(lseek(dst, 0, SEEK_SET) == 0); | |
191 | assert_se(lseek(dst2, 0, SEEK_SET) == 0); | |
d89c8fdf | 192 | r = decompress(dst, dst2, st.st_size - 1); |
0c0cdb06 | 193 | assert_se(r == -EFBIG); |
355b59e2 ZJS |
194 | |
195 | assert_se(unlink(pattern) == 0); | |
196 | assert_se(unlink(pattern2) == 0); | |
197 | } | |
198 | ||
843fecc0 | 199 | int main(int argc, char *argv[]) { |
c552d602 ZJS |
200 | const char text[] = |
201 | "text\0foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF" | |
202 | "foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF"; | |
203 | ||
204 | char data[512] = "random\0"; | |
355b59e2 ZJS |
205 | |
206 | log_set_max_level(LOG_DEBUG); | |
207 | ||
c552d602 ZJS |
208 | random_bytes(data + 7, sizeof(data) - 7); |
209 | ||
d89c8fdf | 210 | #ifdef HAVE_XZ |
c552d602 ZJS |
211 | test_compress_decompress(OBJECT_COMPRESSED_XZ, compress_blob_xz, decompress_blob_xz, |
212 | text, sizeof(text), false); | |
213 | test_compress_decompress(OBJECT_COMPRESSED_XZ, compress_blob_xz, decompress_blob_xz, | |
214 | data, sizeof(data), true); | |
215 | test_decompress_startswith(OBJECT_COMPRESSED_XZ, | |
216 | compress_blob_xz, decompress_startswith_xz, | |
217 | text, sizeof(text), false); | |
218 | test_decompress_startswith(OBJECT_COMPRESSED_XZ, | |
219 | compress_blob_xz, decompress_startswith_xz, | |
220 | data, sizeof(data), true); | |
d89c8fdf ZJS |
221 | test_compress_stream(OBJECT_COMPRESSED_XZ, "xzcat", |
222 | compress_stream_xz, decompress_stream_xz, argv[0]); | |
223 | #else | |
224 | log_info("/* XZ test skipped */"); | |
225 | #endif | |
c552d602 | 226 | |
d89c8fdf | 227 | #ifdef HAVE_LZ4 |
c552d602 ZJS |
228 | test_compress_decompress(OBJECT_COMPRESSED_LZ4, compress_blob_lz4, decompress_blob_lz4, |
229 | text, sizeof(text), false); | |
230 | test_compress_decompress(OBJECT_COMPRESSED_LZ4, compress_blob_lz4, decompress_blob_lz4, | |
231 | data, sizeof(data), true); | |
232 | test_decompress_startswith(OBJECT_COMPRESSED_LZ4, | |
233 | compress_blob_lz4, decompress_startswith_lz4, | |
234 | text, sizeof(text), false); | |
235 | test_decompress_startswith(OBJECT_COMPRESSED_LZ4, | |
236 | compress_blob_lz4, decompress_startswith_lz4, | |
237 | data, sizeof(data), true); | |
d89c8fdf ZJS |
238 | |
239 | /* Produced stream is not compatible with lz4 binary, skip lz4cat check. */ | |
240 | test_compress_stream(OBJECT_COMPRESSED_LZ4, NULL, | |
241 | compress_stream_lz4, decompress_stream_lz4, argv[0]); | |
242 | #else | |
243 | log_info("/* LZ4 test skipped */"); | |
244 | #endif | |
843fecc0 RC |
245 | |
246 | return 0; | |
247 | } |