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3e2cda69 LP |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2015 Lennart Poettering | |
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 | ||
3e2cda69 | 20 | #include "import-compress.h" |
8b43440b LP |
21 | #include "string-table.h" |
22 | #include "util.h" | |
3e2cda69 LP |
23 | |
24 | void import_compress_free(ImportCompress *c) { | |
25 | assert(c); | |
26 | ||
27 | if (c->type == IMPORT_COMPRESS_XZ) | |
28 | lzma_end(&c->xz); | |
587fec42 LP |
29 | else if (c->type == IMPORT_COMPRESS_GZIP) { |
30 | if (c->encoding) | |
31 | deflateEnd(&c->gzip); | |
32 | else | |
33 | inflateEnd(&c->gzip); | |
34 | } else if (c->type == IMPORT_COMPRESS_BZIP2) { | |
35 | if (c->encoding) | |
36 | BZ2_bzCompressEnd(&c->bzip2); | |
37 | else | |
38 | BZ2_bzDecompressEnd(&c->bzip2); | |
39 | } | |
3e2cda69 LP |
40 | |
41 | c->type = IMPORT_COMPRESS_UNKNOWN; | |
42 | } | |
43 | ||
44 | int import_uncompress_detect(ImportCompress *c, const void *data, size_t size) { | |
45 | static const uint8_t xz_signature[] = { | |
46 | 0xfd, '7', 'z', 'X', 'Z', 0x00 | |
47 | }; | |
48 | static const uint8_t gzip_signature[] = { | |
49 | 0x1f, 0x8b | |
50 | }; | |
51 | static const uint8_t bzip2_signature[] = { | |
52 | 'B', 'Z', 'h' | |
53 | }; | |
54 | ||
55 | int r; | |
56 | ||
57 | assert(c); | |
58 | ||
59 | if (c->type != IMPORT_COMPRESS_UNKNOWN) | |
60 | return 1; | |
61 | ||
62 | if (size < MAX3(sizeof(xz_signature), | |
63 | sizeof(gzip_signature), | |
64 | sizeof(bzip2_signature))) | |
65 | return 0; | |
66 | ||
67 | assert(data); | |
68 | ||
69 | if (memcmp(data, xz_signature, sizeof(xz_signature)) == 0) { | |
70 | lzma_ret xzr; | |
71 | ||
72 | xzr = lzma_stream_decoder(&c->xz, UINT64_MAX, LZMA_TELL_UNSUPPORTED_CHECK); | |
73 | if (xzr != LZMA_OK) | |
74 | return -EIO; | |
75 | ||
76 | c->type = IMPORT_COMPRESS_XZ; | |
77 | ||
78 | } else if (memcmp(data, gzip_signature, sizeof(gzip_signature)) == 0) { | |
79 | r = inflateInit2(&c->gzip, 15+16); | |
80 | if (r != Z_OK) | |
81 | return -EIO; | |
82 | ||
83 | c->type = IMPORT_COMPRESS_GZIP; | |
84 | ||
85 | } else if (memcmp(data, bzip2_signature, sizeof(bzip2_signature)) == 0) { | |
86 | r = BZ2_bzDecompressInit(&c->bzip2, 0, 0); | |
87 | if (r != BZ_OK) | |
88 | return -EIO; | |
89 | ||
90 | c->type = IMPORT_COMPRESS_BZIP2; | |
91 | } else | |
92 | c->type = IMPORT_COMPRESS_UNCOMPRESSED; | |
93 | ||
587fec42 LP |
94 | c->encoding = false; |
95 | ||
3e2cda69 LP |
96 | return 1; |
97 | } | |
98 | ||
99 | int import_uncompress(ImportCompress *c, const void *data, size_t size, ImportCompressCallback callback, void *userdata) { | |
100 | int r; | |
101 | ||
102 | assert(c); | |
103 | assert(callback); | |
104 | ||
105 | r = import_uncompress_detect(c, data, size); | |
106 | if (r <= 0) | |
107 | return r; | |
108 | ||
587fec42 LP |
109 | if (c->encoding) |
110 | return -EINVAL; | |
111 | ||
3e2cda69 LP |
112 | if (size <= 0) |
113 | return 1; | |
114 | ||
115 | assert(data); | |
116 | ||
117 | switch (c->type) { | |
118 | ||
119 | case IMPORT_COMPRESS_UNCOMPRESSED: | |
120 | r = callback(data, size, userdata); | |
121 | if (r < 0) | |
122 | return r; | |
123 | ||
124 | break; | |
125 | ||
126 | case IMPORT_COMPRESS_XZ: | |
127 | c->xz.next_in = data; | |
128 | c->xz.avail_in = size; | |
129 | ||
130 | while (c->xz.avail_in > 0) { | |
131 | uint8_t buffer[16 * 1024]; | |
132 | lzma_ret lzr; | |
133 | ||
134 | c->xz.next_out = buffer; | |
135 | c->xz.avail_out = sizeof(buffer); | |
136 | ||
137 | lzr = lzma_code(&c->xz, LZMA_RUN); | |
138 | if (lzr != LZMA_OK && lzr != LZMA_STREAM_END) | |
139 | return -EIO; | |
140 | ||
141 | r = callback(buffer, sizeof(buffer) - c->xz.avail_out, userdata); | |
142 | if (r < 0) | |
143 | return r; | |
144 | } | |
145 | ||
146 | break; | |
147 | ||
148 | case IMPORT_COMPRESS_GZIP: | |
149 | c->gzip.next_in = (void*) data; | |
150 | c->gzip.avail_in = size; | |
151 | ||
152 | while (c->gzip.avail_in > 0) { | |
153 | uint8_t buffer[16 * 1024]; | |
154 | ||
155 | c->gzip.next_out = buffer; | |
156 | c->gzip.avail_out = sizeof(buffer); | |
157 | ||
158 | r = inflate(&c->gzip, Z_NO_FLUSH); | |
159 | if (r != Z_OK && r != Z_STREAM_END) | |
160 | return -EIO; | |
161 | ||
162 | r = callback(buffer, sizeof(buffer) - c->gzip.avail_out, userdata); | |
163 | if (r < 0) | |
164 | return r; | |
165 | } | |
166 | ||
167 | break; | |
168 | ||
169 | case IMPORT_COMPRESS_BZIP2: | |
170 | c->bzip2.next_in = (void*) data; | |
171 | c->bzip2.avail_in = size; | |
172 | ||
173 | while (c->bzip2.avail_in > 0) { | |
174 | uint8_t buffer[16 * 1024]; | |
175 | ||
176 | c->bzip2.next_out = (char*) buffer; | |
177 | c->bzip2.avail_out = sizeof(buffer); | |
178 | ||
179 | r = BZ2_bzDecompress(&c->bzip2); | |
180 | if (r != BZ_OK && r != BZ_STREAM_END) | |
181 | return -EIO; | |
182 | ||
183 | r = callback(buffer, sizeof(buffer) - c->bzip2.avail_out, userdata); | |
184 | if (r < 0) | |
185 | return r; | |
186 | } | |
187 | ||
188 | break; | |
189 | ||
190 | default: | |
191 | assert_not_reached("Unknown compression"); | |
192 | } | |
193 | ||
194 | return 1; | |
195 | } | |
196 | ||
587fec42 LP |
197 | int import_compress_init(ImportCompress *c, ImportCompressType t) { |
198 | int r; | |
199 | ||
200 | assert(c); | |
201 | ||
202 | switch (t) { | |
203 | ||
204 | case IMPORT_COMPRESS_XZ: { | |
205 | lzma_ret xzr; | |
206 | ||
207 | xzr = lzma_easy_encoder(&c->xz, LZMA_PRESET_DEFAULT, LZMA_CHECK_CRC64); | |
208 | if (xzr != LZMA_OK) | |
209 | return -EIO; | |
210 | ||
211 | c->type = IMPORT_COMPRESS_XZ; | |
212 | break; | |
213 | } | |
214 | ||
215 | case IMPORT_COMPRESS_GZIP: | |
216 | r = deflateInit2(&c->gzip, Z_DEFAULT_COMPRESSION, Z_DEFLATED, 15 + 16, 8, Z_DEFAULT_STRATEGY); | |
217 | if (r != Z_OK) | |
218 | return -EIO; | |
219 | ||
220 | c->type = IMPORT_COMPRESS_GZIP; | |
221 | break; | |
222 | ||
223 | case IMPORT_COMPRESS_BZIP2: | |
224 | r = BZ2_bzCompressInit(&c->bzip2, 9, 0, 0); | |
225 | if (r != BZ_OK) | |
226 | return -EIO; | |
227 | ||
228 | c->type = IMPORT_COMPRESS_BZIP2; | |
229 | break; | |
230 | ||
231 | case IMPORT_COMPRESS_UNCOMPRESSED: | |
232 | c->type = IMPORT_COMPRESS_UNCOMPRESSED; | |
233 | break; | |
234 | ||
235 | default: | |
15411c0c | 236 | return -EOPNOTSUPP; |
587fec42 LP |
237 | } |
238 | ||
239 | c->encoding = true; | |
240 | return 0; | |
241 | } | |
242 | ||
243 | static int enlarge_buffer(void **buffer, size_t *buffer_size, size_t *buffer_allocated) { | |
244 | size_t l; | |
245 | void *p; | |
246 | ||
247 | if (*buffer_allocated > *buffer_size) | |
248 | return 0; | |
249 | ||
250 | l = MAX(16*1024U, (*buffer_size * 2)); | |
251 | p = realloc(*buffer, l); | |
252 | if (!p) | |
253 | return -ENOMEM; | |
254 | ||
255 | *buffer = p; | |
256 | *buffer_allocated = l; | |
257 | ||
258 | return 1; | |
259 | } | |
260 | ||
261 | int import_compress(ImportCompress *c, const void *data, size_t size, void **buffer, size_t *buffer_size, size_t *buffer_allocated) { | |
262 | int r; | |
263 | ||
264 | assert(c); | |
265 | assert(buffer); | |
266 | assert(buffer_size); | |
267 | assert(buffer_allocated); | |
268 | ||
269 | if (!c->encoding) | |
270 | return -EINVAL; | |
271 | ||
272 | if (size <= 0) | |
273 | return 0; | |
274 | ||
275 | assert(data); | |
276 | ||
277 | *buffer_size = 0; | |
278 | ||
279 | switch (c->type) { | |
280 | ||
281 | case IMPORT_COMPRESS_XZ: | |
282 | ||
283 | c->xz.next_in = data; | |
284 | c->xz.avail_in = size; | |
285 | ||
286 | while (c->xz.avail_in > 0) { | |
287 | lzma_ret lzr; | |
288 | ||
289 | r = enlarge_buffer(buffer, buffer_size, buffer_allocated); | |
290 | if (r < 0) | |
291 | return r; | |
292 | ||
293 | c->xz.next_out = (uint8_t*) *buffer + *buffer_size; | |
294 | c->xz.avail_out = *buffer_allocated - *buffer_size; | |
295 | ||
296 | lzr = lzma_code(&c->xz, LZMA_RUN); | |
297 | if (lzr != LZMA_OK) | |
298 | return -EIO; | |
299 | ||
300 | *buffer_size += (*buffer_allocated - *buffer_size) - c->xz.avail_out; | |
301 | } | |
302 | ||
303 | break; | |
304 | ||
305 | case IMPORT_COMPRESS_GZIP: | |
306 | ||
307 | c->gzip.next_in = (void*) data; | |
308 | c->gzip.avail_in = size; | |
309 | ||
310 | while (c->gzip.avail_in > 0) { | |
311 | r = enlarge_buffer(buffer, buffer_size, buffer_allocated); | |
312 | if (r < 0) | |
313 | return r; | |
314 | ||
315 | c->gzip.next_out = (uint8_t*) *buffer + *buffer_size; | |
316 | c->gzip.avail_out = *buffer_allocated - *buffer_size; | |
317 | ||
318 | r = deflate(&c->gzip, Z_NO_FLUSH); | |
319 | if (r != Z_OK) | |
320 | return -EIO; | |
321 | ||
322 | *buffer_size += (*buffer_allocated - *buffer_size) - c->gzip.avail_out; | |
323 | } | |
324 | ||
325 | break; | |
326 | ||
327 | case IMPORT_COMPRESS_BZIP2: | |
328 | ||
329 | c->bzip2.next_in = (void*) data; | |
330 | c->bzip2.avail_in = size; | |
331 | ||
332 | while (c->bzip2.avail_in > 0) { | |
333 | r = enlarge_buffer(buffer, buffer_size, buffer_allocated); | |
334 | if (r < 0) | |
335 | return r; | |
336 | ||
337 | c->bzip2.next_out = (void*) ((uint8_t*) *buffer + *buffer_size); | |
338 | c->bzip2.avail_out = *buffer_allocated - *buffer_size; | |
339 | ||
340 | r = BZ2_bzCompress(&c->bzip2, BZ_RUN); | |
341 | if (r != BZ_RUN_OK) | |
342 | return -EIO; | |
343 | ||
344 | *buffer_size += (*buffer_allocated - *buffer_size) - c->bzip2.avail_out; | |
345 | } | |
346 | ||
347 | break; | |
348 | ||
349 | case IMPORT_COMPRESS_UNCOMPRESSED: | |
350 | ||
351 | if (*buffer_allocated < size) { | |
352 | void *p; | |
353 | ||
354 | p = realloc(*buffer, size); | |
355 | if (!p) | |
356 | return -ENOMEM; | |
357 | ||
358 | *buffer = p; | |
359 | *buffer_allocated = size; | |
360 | } | |
361 | ||
362 | memcpy(*buffer, data, size); | |
363 | *buffer_size = size; | |
364 | break; | |
365 | ||
366 | default: | |
15411c0c | 367 | return -EOPNOTSUPP; |
587fec42 LP |
368 | } |
369 | ||
370 | return 0; | |
371 | } | |
372 | ||
373 | int import_compress_finish(ImportCompress *c, void **buffer, size_t *buffer_size, size_t *buffer_allocated) { | |
374 | int r; | |
375 | ||
376 | assert(c); | |
377 | assert(buffer); | |
378 | assert(buffer_size); | |
379 | assert(buffer_allocated); | |
380 | ||
381 | if (!c->encoding) | |
382 | return -EINVAL; | |
383 | ||
384 | *buffer_size = 0; | |
385 | ||
386 | switch (c->type) { | |
387 | ||
388 | case IMPORT_COMPRESS_XZ: { | |
389 | lzma_ret lzr; | |
390 | ||
391 | c->xz.avail_in = 0; | |
392 | ||
393 | do { | |
394 | r = enlarge_buffer(buffer, buffer_size, buffer_allocated); | |
395 | if (r < 0) | |
396 | return r; | |
397 | ||
398 | c->xz.next_out = (uint8_t*) *buffer + *buffer_size; | |
399 | c->xz.avail_out = *buffer_allocated - *buffer_size; | |
400 | ||
401 | lzr = lzma_code(&c->xz, LZMA_FINISH); | |
402 | if (lzr != LZMA_OK && lzr != LZMA_STREAM_END) | |
403 | return -EIO; | |
404 | ||
405 | *buffer_size += (*buffer_allocated - *buffer_size) - c->xz.avail_out; | |
406 | } while (lzr != LZMA_STREAM_END); | |
407 | ||
408 | break; | |
409 | } | |
410 | ||
411 | case IMPORT_COMPRESS_GZIP: | |
412 | c->gzip.avail_in = 0; | |
413 | ||
414 | do { | |
415 | r = enlarge_buffer(buffer, buffer_size, buffer_allocated); | |
416 | if (r < 0) | |
417 | return r; | |
418 | ||
419 | c->gzip.next_out = (uint8_t*) *buffer + *buffer_size; | |
420 | c->gzip.avail_out = *buffer_allocated - *buffer_size; | |
421 | ||
422 | r = deflate(&c->gzip, Z_FINISH); | |
423 | if (r != Z_OK && r != Z_STREAM_END) | |
424 | return -EIO; | |
425 | ||
426 | *buffer_size += (*buffer_allocated - *buffer_size) - c->gzip.avail_out; | |
427 | } while (r != Z_STREAM_END); | |
428 | ||
429 | break; | |
430 | ||
431 | case IMPORT_COMPRESS_BZIP2: | |
432 | c->bzip2.avail_in = 0; | |
433 | ||
434 | do { | |
435 | r = enlarge_buffer(buffer, buffer_size, buffer_allocated); | |
436 | if (r < 0) | |
437 | return r; | |
438 | ||
439 | c->bzip2.next_out = (void*) ((uint8_t*) *buffer + *buffer_size); | |
440 | c->bzip2.avail_out = *buffer_allocated - *buffer_size; | |
441 | ||
442 | r = BZ2_bzCompress(&c->bzip2, BZ_FINISH); | |
443 | if (r != BZ_FINISH_OK && r != BZ_STREAM_END) | |
444 | return -EIO; | |
445 | ||
446 | *buffer_size += (*buffer_allocated - *buffer_size) - c->bzip2.avail_out; | |
447 | } while (r != BZ_STREAM_END); | |
448 | ||
449 | break; | |
450 | ||
451 | case IMPORT_COMPRESS_UNCOMPRESSED: | |
452 | break; | |
453 | ||
454 | default: | |
15411c0c | 455 | return -EOPNOTSUPP; |
587fec42 LP |
456 | } |
457 | ||
458 | return 0; | |
459 | } | |
460 | ||
3e2cda69 LP |
461 | static const char* const import_compress_type_table[_IMPORT_COMPRESS_TYPE_MAX] = { |
462 | [IMPORT_COMPRESS_UNKNOWN] = "unknown", | |
463 | [IMPORT_COMPRESS_UNCOMPRESSED] = "uncompressed", | |
464 | [IMPORT_COMPRESS_XZ] = "xz", | |
465 | [IMPORT_COMPRESS_GZIP] = "gzip", | |
466 | [IMPORT_COMPRESS_BZIP2] = "bzip2", | |
467 | }; | |
468 | ||
469 | DEFINE_STRING_TABLE_LOOKUP(import_compress_type, ImportCompressType); |