1 /*-
2 * Copyright (c) 2003-2007,2013 Tim Kientzle
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25 #include "test.h"
26 __FBSDID("$FreeBSD$");
27
28 #include <errno.h>
29 #include <stdlib.h>
30 #include <string.h>
31
32 /*
33 * This is a somewhat tricky test that verifies the ability to
34 * write and read very large entries to zip archives.
35 *
36 * See test_tar_large.c for more information about the machinery
37 * being used here.
38 */
39
40 static size_t nullsize;
41 static void *nulldata;
42
43 struct fileblock {
44 struct fileblock *next;
45 int size;
46 void *buff;
47 int64_t gap_size; /* Size of following gap */
48 };
49
50 struct fileblocks {
51 int64_t filesize;
52 int64_t fileposition;
53 int64_t gap_remaining;
54 void *buff;
55 struct fileblock *first;
56 struct fileblock *current;
57 struct fileblock *last;
58 };
59
60 /* The following size definitions simplify things below. */
61 #define KB ((int64_t)1024)
62 #define MB ((int64_t)1024 * KB)
63 #define GB ((int64_t)1024 * MB)
64 #define TB ((int64_t)1024 * GB)
65
66 static int64_t memory_read_skip(struct archive *, void *, int64_t request);
67 static ssize_t memory_read(struct archive *, void *, const void **buff);
68 static ssize_t memory_write(struct archive *, void *, const void *, size_t);
69
le16(const void * _p)70 static uint16_t le16(const void *_p) {
71 const uint8_t *p = _p;
72 return p[0] | (p[1] << 8);
73 }
74
le32(const void * _p)75 static uint32_t le32(const void *_p) {
76 const uint8_t *p = _p;
77 return le16(p) | ((uint32_t)le16(p + 2) << 16);
78 }
79
le64(const void * _p)80 static uint64_t le64(const void *_p) {
81 const uint8_t *p = _p;
82 return le32(p) | ((uint64_t)le32(p + 4) << 32);
83 }
84
85 static ssize_t
memory_write(struct archive * a,void * _private,const void * buff,size_t size)86 memory_write(struct archive *a, void *_private, const void *buff, size_t size)
87 {
88 struct fileblocks *private = _private;
89 struct fileblock *block;
90
91 (void)a;
92
93 if ((const char *)nulldata <= (const char *)buff
94 && (const char *)buff < (const char *)nulldata + nullsize) {
95 /* We don't need to store a block of gap data. */
96 private->last->gap_size += (int64_t)size;
97 } else {
98 /* Yes, we're assuming the very first write is metadata. */
99 /* It's header or metadata, copy and save it. */
100 block = (struct fileblock *)malloc(sizeof(*block));
101 memset(block, 0, sizeof(*block));
102 block->size = (int)size;
103 block->buff = malloc(size);
104 memcpy(block->buff, buff, size);
105 if (private->last == NULL) {
106 private->first = private->last = block;
107 } else {
108 private->last->next = block;
109 private->last = block;
110 }
111 block->next = NULL;
112 }
113 private->filesize += size;
114 return ((long)size);
115 }
116
117 static ssize_t
memory_read(struct archive * a,void * _private,const void ** buff)118 memory_read(struct archive *a, void *_private, const void **buff)
119 {
120 struct fileblocks *private = _private;
121 ssize_t size;
122
123 (void)a;
124
125 while (private->current != NULL && private->buff == NULL && private->gap_remaining == 0) {
126 private->current = private->current->next;
127 if (private->current != NULL) {
128 private->buff = private->current->buff;
129 private->gap_remaining = private->current->gap_size;
130 }
131 }
132
133 if (private->current == NULL)
134 return (0);
135
136 /* If there's real data, return that. */
137 if (private->buff != NULL) {
138 *buff = private->buff;
139 size = ((char *)private->current->buff + private->current->size)
140 - (char *)private->buff;
141 private->buff = NULL;
142 private->fileposition += size;
143 return (size);
144 }
145
146 /* Big gap: too big to return all at once, so just return some. */
147 if (private->gap_remaining > (int64_t)nullsize) {
148 private->gap_remaining -= nullsize;
149 *buff = nulldata;
150 private->fileposition += nullsize;
151 return (nullsize);
152 }
153
154 /* Small gap: finish the gap and prep for next block. */
155 if (private->gap_remaining > 0) {
156 size = (ssize_t)private->gap_remaining;
157 *buff = nulldata;
158 private->gap_remaining = 0;
159 private->fileposition += size;
160
161 private->current = private->current->next;
162 if (private->current != NULL) {
163 private->buff = private->current->buff;
164 private->gap_remaining = private->current->gap_size;
165 }
166
167 return (size);
168 }
169 fprintf(stderr, "\n\n\nInternal failure\n\n\n");
170 exit(1);
171 }
172
173 static int
memory_read_open(struct archive * a,void * _private)174 memory_read_open(struct archive *a, void *_private)
175 {
176 struct fileblocks *private = _private;
177
178 (void)a; /* UNUSED */
179
180 private->current = private->first;
181 private->fileposition = 0;
182 if (private->current != NULL) {
183 private->buff = private->current->buff;
184 private->gap_remaining = private->current->gap_size;
185 }
186 return (ARCHIVE_OK);
187 }
188
189 static int64_t
memory_read_seek(struct archive * a,void * _private,int64_t offset,int whence)190 memory_read_seek(struct archive *a, void *_private, int64_t offset, int whence)
191 {
192 struct fileblocks *private = _private;
193
194 (void)a;
195 if (whence == SEEK_END) {
196 offset = private->filesize + offset;
197 } else if (whence == SEEK_CUR) {
198 offset = private->fileposition + offset;
199 }
200
201 if (offset < 0) {
202 fprintf(stderr, "\n\n\nInternal failure: negative seek\n\n\n");
203 exit(1);
204 }
205
206 /* We've converted the request into a SEEK_SET. */
207 private->fileposition = offset;
208
209 /* Walk the block list to find the new position. */
210 offset = 0;
211 private->current = private->first;
212 while (private->current != NULL) {
213 if (offset + private->current->size > private->fileposition) {
214 /* Position is in this block. */
215 private->buff = (char *)private->current->buff
216 + private->fileposition - offset;
217 private->gap_remaining = private->current->gap_size;
218 return private->fileposition;
219 }
220 offset += private->current->size;
221 if (offset + private->current->gap_size > private->fileposition) {
222 /* Position is in this gap. */
223 private->buff = NULL;
224 private->gap_remaining = private->current->gap_size
225 - (private->fileposition - offset);
226 return private->fileposition;
227 }
228 offset += private->current->gap_size;
229 /* Skip to next block. */
230 private->current = private->current->next;
231 }
232 if (private->fileposition == private->filesize) {
233 return private->fileposition;
234 }
235 fprintf(stderr, "\n\n\nInternal failure: over-sized seek\n\n\n");
236 exit(1);
237 }
238
239 static int64_t
memory_read_skip(struct archive * a,void * _private,int64_t skip)240 memory_read_skip(struct archive *a, void *_private, int64_t skip)
241 {
242 struct fileblocks *private = _private;
243 int64_t old_position = private->fileposition;
244 int64_t new_position = memory_read_seek(a, _private, skip, SEEK_CUR);
245 return (new_position - old_position);
246 }
247
248 static struct fileblocks *
fileblocks_new(void)249 fileblocks_new(void)
250 {
251 struct fileblocks *fileblocks;
252
253 fileblocks = calloc(1, sizeof(struct fileblocks));
254 return fileblocks;
255 }
256
257 static void
fileblocks_free(struct fileblocks * fileblocks)258 fileblocks_free(struct fileblocks *fileblocks)
259 {
260 while (fileblocks->first != NULL) {
261 struct fileblock *b = fileblocks->first;
262 fileblocks->first = fileblocks->first->next;
263 free(b->buff);
264 free(b);
265 }
266 free(fileblocks);
267 }
268
269
270 /* The sizes of the entries we're going to generate. */
271 static int64_t test_sizes[] = {
272 /* Test for 32-bit signed overflow. */
273 2 * GB - 1, 2 * GB, 2 * GB + 1,
274 /* Test for 32-bit unsigned overflow. */
275 4 * GB - 1, 4 * GB, 4 * GB + 1,
276 /* And beyond ... because we can. */
277 16 * GB - 1, 16 * GB, 16 * GB + 1,
278 64 * GB - 1, 64 * GB, 64 * GB + 1,
279 256 * GB - 1, 256 * GB, 256 * GB + 1,
280 1 * TB,
281 0
282 };
283
284
285 static void
verify_large_zip(struct archive * a,struct fileblocks * fileblocks)286 verify_large_zip(struct archive *a, struct fileblocks *fileblocks)
287 {
288 char namebuff[64];
289 struct archive_entry *ae;
290 int i;
291
292 assertEqualIntA(a, ARCHIVE_OK,
293 archive_read_set_options(a, "zip:ignorecrc32"));
294 assertEqualIntA(a, ARCHIVE_OK,
295 archive_read_set_open_callback(a, memory_read_open));
296 assertEqualIntA(a, ARCHIVE_OK,
297 archive_read_set_read_callback(a, memory_read));
298 assertEqualIntA(a, ARCHIVE_OK,
299 archive_read_set_skip_callback(a, memory_read_skip));
300 assertEqualIntA(a, ARCHIVE_OK,
301 archive_read_set_seek_callback(a, memory_read_seek));
302 assertEqualIntA(a, ARCHIVE_OK,
303 archive_read_set_callback_data(a, fileblocks));
304 assertEqualIntA(a, ARCHIVE_OK, archive_read_open1(a));
305
306 /*
307 * Read entries back.
308 */
309 for (i = 0; test_sizes[i] > 0; i++) {
310 assertEqualIntA(a, ARCHIVE_OK,
311 archive_read_next_header(a, &ae));
312 sprintf(namebuff, "file_%d", i);
313 assertEqualString(namebuff, archive_entry_pathname(ae));
314 assertEqualInt(test_sizes[i], archive_entry_size(ae));
315 }
316 assertEqualIntA(a, 0, archive_read_next_header(a, &ae));
317 assertEqualString("lastfile", archive_entry_pathname(ae));
318
319 assertEqualIntA(a, ARCHIVE_EOF, archive_read_next_header(a, &ae));
320
321 /* Close out the archive. */
322 assertEqualIntA(a, ARCHIVE_OK, archive_read_close(a));
323 }
324
DEFINE_TEST(test_write_format_zip_large)325 DEFINE_TEST(test_write_format_zip_large)
326 {
327 int i;
328 char namebuff[64];
329 struct fileblocks *fileblocks = fileblocks_new();
330 struct archive_entry *ae;
331 struct archive *a;
332 const char *p;
333 const char *cd_start, *zip64_eocd, *zip64_locator, *eocd;
334 int64_t cd_size;
335 char *buff;
336 int64_t filesize;
337 size_t writesize, buffsize, s;
338
339 nullsize = (size_t)(1 * MB);
340 nulldata = malloc(nullsize);
341 memset(nulldata, 0xAA, nullsize);
342
343 /*
344 * Open an archive for writing.
345 */
346 a = archive_write_new();
347 archive_write_set_format_zip(a);
348 assertEqualIntA(a, ARCHIVE_OK,
349 archive_write_set_options(a, "zip:compression=store"));
350 assertEqualIntA(a, ARCHIVE_OK,
351 archive_write_set_options(a, "zip:fakecrc32"));
352 assertEqualIntA(a, ARCHIVE_OK,
353 archive_write_set_bytes_per_block(a, 0)); /* No buffering. */
354 assertEqualIntA(a, ARCHIVE_OK,
355 archive_write_open(a, fileblocks, NULL, memory_write, NULL));
356
357 /*
358 * Write a series of large files to it.
359 */
360 for (i = 0; test_sizes[i] != 0; i++) {
361 assert((ae = archive_entry_new()) != NULL);
362 sprintf(namebuff, "file_%d", i);
363 archive_entry_copy_pathname(ae, namebuff);
364 archive_entry_set_mode(ae, S_IFREG | 0755);
365 filesize = test_sizes[i];
366 archive_entry_set_size(ae, filesize);
367
368 assertEqualIntA(a, ARCHIVE_OK,
369 archive_write_header(a, ae));
370 archive_entry_free(ae);
371
372 /*
373 * Write the actual data to the archive.
374 */
375 while (filesize > 0) {
376 writesize = nullsize;
377 if ((int64_t)writesize > filesize)
378 writesize = (size_t)filesize;
379 assertEqualIntA(a, (int)writesize,
380 (int)archive_write_data(a, nulldata, writesize));
381 filesize -= writesize;
382 }
383 }
384
385 assert((ae = archive_entry_new()) != NULL);
386 archive_entry_copy_pathname(ae, "lastfile");
387 archive_entry_set_mode(ae, S_IFREG | 0755);
388 assertA(0 == archive_write_header(a, ae));
389 archive_entry_free(ae);
390
391 /* Close out the archive. */
392 assertEqualIntA(a, ARCHIVE_OK, archive_write_close(a));
393 assertEqualInt(ARCHIVE_OK, archive_write_free(a));
394
395 /*
396 * Read back with seeking reader:
397 */
398 a = archive_read_new();
399 assertEqualIntA(a, ARCHIVE_OK,
400 archive_read_support_format_zip_seekable(a));
401 verify_large_zip(a, fileblocks);
402 assertEqualInt(ARCHIVE_OK, archive_read_free(a));
403
404 /*
405 * Read back with streaming reader:
406 */
407 a = archive_read_new();
408 assertEqualIntA(a, ARCHIVE_OK,
409 archive_read_support_format_zip_streamable(a));
410 verify_large_zip(a, fileblocks);
411 assertEqualInt(ARCHIVE_OK, archive_read_free(a));
412
413 /*
414 * Manually verify some of the final bytes of the archives.
415 */
416 /* Collect the final bytes together */
417 #define FINAL_SIZE 8192
418 buff = malloc(FINAL_SIZE);
419 buffsize = 0;
420 memory_read_open(NULL, fileblocks);
421 memory_read_seek(NULL, fileblocks, -FINAL_SIZE, SEEK_END);
422 while ((s = memory_read(NULL, fileblocks, (const void **)&p)) > 0) {
423 memcpy(buff + buffsize, p, s);
424 buffsize += s;
425 }
426 assertEqualInt(buffsize, FINAL_SIZE);
427
428 p = buff + buffsize;
429
430 /* Verify regular end-of-central-directory record */
431 eocd = p - 22;
432 assertEqualMem(eocd, "PK\005\006\0\0\0\0", 8);
433 assertEqualMem(eocd + 8, "\021\0\021\0", 4); /* 17 entries total */
434 cd_size = le32(eocd + 12);
435 /* Start of CD offset should be 0xffffffff */
436 assertEqualMem(eocd + 16, "\xff\xff\xff\xff", 4);
437 assertEqualMem(eocd + 20, "\0\0", 2); /* No Zip comment */
438
439 /* Verify Zip64 locator */
440 zip64_locator = p - 42;
441 assertEqualMem(zip64_locator, "PK\006\007\0\0\0\0", 8);
442 zip64_eocd = p - (fileblocks->filesize - le64(zip64_locator + 8));
443 assertEqualMem(zip64_locator + 16, "\001\0\0\0", 4);
444
445 /* Verify Zip64 end-of-cd record. */
446 assert(zip64_eocd == p - 98);
447 assertEqualMem(zip64_eocd, "PK\006\006", 4);
448 assertEqualInt(44, le64(zip64_eocd + 4)); // Size of EoCD record - 12
449 assertEqualMem(zip64_eocd + 12, "\055\0", 2); // Made by version: 45
450 assertEqualMem(zip64_eocd + 14, "\055\0", 2); // Requires version: 45
451 assertEqualMem(zip64_eocd + 16, "\0\0\0\0", 4); // This disk
452 assertEqualMem(zip64_eocd + 20, "\0\0\0\0", 4); // Total disks
453 assertEqualInt(17, le64(zip64_eocd + 24)); // Entries on this disk
454 assertEqualInt(17, le64(zip64_eocd + 32)); // Total entries
455 cd_size = le64(zip64_eocd + 40);
456 cd_start = p - (fileblocks->filesize - le64(zip64_eocd + 48));
457
458 assert(cd_start + cd_size == zip64_eocd);
459
460 assertEqualInt(le64(zip64_eocd + 48) // Start of CD
461 + cd_size
462 + 56 // Size of Zip64 EOCD
463 + 20 // Size of Zip64 locator
464 + 22, // Size of EOCD
465 fileblocks->filesize);
466
467 // TODO: Scan entire Central Directory, sanity-check all data
468 assertEqualMem(cd_start, "PK\001\002", 4);
469
470 fileblocks_free(fileblocks);
471 free(buff);
472 free(nulldata);
473 }
474