1 /* $NetBSD: cdf.c,v 1.21 2023/08/18 19:00:11 christos Exp $ */
2
3 /*-
4 * Copyright (c) 2008 Christos Zoulas
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28 /*
29 * Parse Composite Document Files, the format used in Microsoft Office
30 * document files before they switched to zipped XML.
31 * Info from: http://sc.openoffice.org/compdocfileformat.pdf
32 *
33 * N.B. This is the "Composite Document File" format, and not the
34 * "Compound Document Format", nor the "Channel Definition Format".
35 */
36
37 #include "file.h"
38
39 #ifndef lint
40 #if 0
41 FILE_RCSID("@(#)$File: cdf.c,v 1.123 2022/09/24 20:30:13 christos Exp $")
42 #else
43 __RCSID("$NetBSD: cdf.c,v 1.21 2023/08/18 19:00:11 christos Exp $");
44 #endif
45 #endif
46
47 #include <assert.h>
48 #ifdef CDF_DEBUG
49 #include <err.h>
50 #endif
51 #include <stdlib.h>
52 #include <unistd.h>
53 #include <string.h>
54 #include <time.h>
55 #include <ctype.h>
56 #include <limits.h>
57 #ifdef HAVE_BYTESWAP_H
58 #include <byteswap.h>
59 #endif
60 #ifdef HAVE_SYS_BSWAP_H
61 #include <sys/bswap.h>
62 #endif
63
64 #ifndef EFTYPE
65 #define EFTYPE EINVAL
66 #endif
67
68 #ifndef SIZE_T_MAX
69 #define SIZE_T_MAX CAST(size_t, ~0ULL)
70 #endif
71
72 #include "cdf.h"
73
74 #ifdef CDF_DEBUG
75 #define DPRINTF(a) printf a, fflush(stdout)
76 #else
77 #define DPRINTF(a)
78 #endif
79
80 static union {
81 char s[4];
82 uint32_t u;
83 } cdf_bo;
84
85 #define NEED_SWAP (cdf_bo.u == CAST(uint32_t, 0x01020304))
86
87 #define CDF_TOLE8(x) \
88 (CAST(uint64_t, NEED_SWAP ? _cdf_tole8(x) : CAST(uint64_t, x)))
89 #define CDF_TOLE4(x) \
90 (CAST(uint32_t, NEED_SWAP ? _cdf_tole4(x) : CAST(uint32_t, x)))
91 #define CDF_TOLE2(x) \
92 (CAST(uint16_t, NEED_SWAP ? _cdf_tole2(x) : CAST(uint16_t, x)))
93 #define CDF_TOLE(x) (/*CONSTCOND*/sizeof(x) == 2 ? \
94 CDF_TOLE2(CAST(uint16_t, x)) : \
95 (/*CONSTCOND*/sizeof(x) == 4 ? \
96 CDF_TOLE4(CAST(uint32_t, x)) : \
97 CDF_TOLE8(CAST(uint64_t, x))))
98 #define CDF_GETUINT32(x, y) cdf_getuint32(x, y)
99
100 #define CDF_MALLOC(n) cdf_malloc(__FILE__, __LINE__, (n))
101 #define CDF_REALLOC(p, n) cdf_realloc(__FILE__, __LINE__, (p), (n))
102 #define CDF_CALLOC(n, u) cdf_calloc(__FILE__, __LINE__, (n), (u))
103
104
105 /*ARGSUSED*/
106 static void *
cdf_malloc(const char * file,size_t line,size_t n)107 cdf_malloc(const char *file __attribute__((__unused__)),
108 size_t line __attribute__((__unused__)), size_t n)
109 {
110 DPRINTF(("%s,%" SIZE_T_FORMAT "u: %s %" SIZE_T_FORMAT "u\n",
111 file, line, __func__, n));
112 if (n == 0)
113 n++;
114 return malloc(n);
115 }
116
117 /*ARGSUSED*/
118 static void *
cdf_realloc(const char * file,size_t line,void * p,size_t n)119 cdf_realloc(const char *file __attribute__((__unused__)),
120 size_t line __attribute__((__unused__)), void *p, size_t n)
121 {
122 DPRINTF(("%s,%" SIZE_T_FORMAT "u: %s %" SIZE_T_FORMAT "u\n",
123 file, line, __func__, n));
124 return realloc(p, n);
125 }
126
127 /*ARGSUSED*/
128 static void *
cdf_calloc(const char * file,size_t line,size_t n,size_t u)129 cdf_calloc(const char *file __attribute__((__unused__)),
130 size_t line __attribute__((__unused__)), size_t n, size_t u)
131 {
132 DPRINTF(("%s,%" SIZE_T_FORMAT "u: %s %" SIZE_T_FORMAT "u %"
133 SIZE_T_FORMAT "u\n", file, line, __func__, n, u));
134 if (n == 0)
135 n++;
136 return calloc(n, u);
137 }
138
139 #if defined(HAVE_BYTESWAP_H)
140 # define _cdf_tole2(x) bswap_16(x)
141 # define _cdf_tole4(x) bswap_32(x)
142 # define _cdf_tole8(x) bswap_64(x)
143 #elif defined(HAVE_SYS_BSWAP_H)
144 # define _cdf_tole2(x) bswap16(x)
145 # define _cdf_tole4(x) bswap32(x)
146 # define _cdf_tole8(x) bswap64(x)
147 #else
148 /*
149 * swap a short
150 */
151 static uint16_t
_cdf_tole2(uint16_t sv)152 _cdf_tole2(uint16_t sv)
153 {
154 uint16_t rv;
155 uint8_t *s = RCAST(uint8_t *, RCAST(void *, &sv));
156 uint8_t *d = RCAST(uint8_t *, RCAST(void *, &rv));
157 d[0] = s[1];
158 d[1] = s[0];
159 return rv;
160 }
161
162 /*
163 * swap an int
164 */
165 static uint32_t
_cdf_tole4(uint32_t sv)166 _cdf_tole4(uint32_t sv)
167 {
168 uint32_t rv;
169 uint8_t *s = RCAST(uint8_t *, RCAST(void *, &sv));
170 uint8_t *d = RCAST(uint8_t *, RCAST(void *, &rv));
171 d[0] = s[3];
172 d[1] = s[2];
173 d[2] = s[1];
174 d[3] = s[0];
175 return rv;
176 }
177
178 /*
179 * swap a quad
180 */
181 static uint64_t
_cdf_tole8(uint64_t sv)182 _cdf_tole8(uint64_t sv)
183 {
184 uint64_t rv;
185 uint8_t *s = RCAST(uint8_t *, RCAST(void *, &sv));
186 uint8_t *d = RCAST(uint8_t *, RCAST(void *, &rv));
187 d[0] = s[7];
188 d[1] = s[6];
189 d[2] = s[5];
190 d[3] = s[4];
191 d[4] = s[3];
192 d[5] = s[2];
193 d[6] = s[1];
194 d[7] = s[0];
195 return rv;
196 }
197 #endif
198
199 /*
200 * grab a uint32_t from a possibly unaligned address, and return it in
201 * the native host order.
202 */
203 static uint32_t
cdf_getuint32(const uint8_t * p,size_t offs)204 cdf_getuint32(const uint8_t *p, size_t offs)
205 {
206 uint32_t rv;
207 (void)memcpy(&rv, p + offs * sizeof(uint32_t), sizeof(rv));
208 return CDF_TOLE4(rv);
209 }
210
211 #define CDF_UNPACK(a) \
212 (void)memcpy(&(a), &buf[len], sizeof(a)), len += sizeof(a)
213 #define CDF_UNPACKA(a) \
214 (void)memcpy((a), &buf[len], sizeof(a)), len += sizeof(a)
215
216 uint16_t
cdf_tole2(uint16_t sv)217 cdf_tole2(uint16_t sv)
218 {
219 return CDF_TOLE2(sv);
220 }
221
222 uint32_t
cdf_tole4(uint32_t sv)223 cdf_tole4(uint32_t sv)
224 {
225 return CDF_TOLE4(sv);
226 }
227
228 uint64_t
cdf_tole8(uint64_t sv)229 cdf_tole8(uint64_t sv)
230 {
231 return CDF_TOLE8(sv);
232 }
233
234 void
cdf_swap_header(cdf_header_t * h)235 cdf_swap_header(cdf_header_t *h)
236 {
237 size_t i;
238
239 h->h_magic = CDF_TOLE8(h->h_magic);
240 h->h_uuid[0] = CDF_TOLE8(h->h_uuid[0]);
241 h->h_uuid[1] = CDF_TOLE8(h->h_uuid[1]);
242 h->h_revision = CDF_TOLE2(h->h_revision);
243 h->h_version = CDF_TOLE2(h->h_version);
244 h->h_byte_order = CDF_TOLE2(h->h_byte_order);
245 h->h_sec_size_p2 = CDF_TOLE2(h->h_sec_size_p2);
246 h->h_short_sec_size_p2 = CDF_TOLE2(h->h_short_sec_size_p2);
247 h->h_num_sectors_in_sat = CDF_TOLE4(h->h_num_sectors_in_sat);
248 h->h_secid_first_directory = CDF_TOLE4(h->h_secid_first_directory);
249 h->h_min_size_standard_stream =
250 CDF_TOLE4(h->h_min_size_standard_stream);
251 h->h_secid_first_sector_in_short_sat =
252 CDF_TOLE4(CAST(uint32_t, h->h_secid_first_sector_in_short_sat));
253 h->h_num_sectors_in_short_sat =
254 CDF_TOLE4(h->h_num_sectors_in_short_sat);
255 h->h_secid_first_sector_in_master_sat =
256 CDF_TOLE4(CAST(uint32_t, h->h_secid_first_sector_in_master_sat));
257 h->h_num_sectors_in_master_sat =
258 CDF_TOLE4(h->h_num_sectors_in_master_sat);
259 for (i = 0; i < __arraycount(h->h_master_sat); i++) {
260 h->h_master_sat[i] =
261 CDF_TOLE4(CAST(uint32_t, h->h_master_sat[i]));
262 }
263 }
264
265 void
cdf_unpack_header(cdf_header_t * h,char * buf)266 cdf_unpack_header(cdf_header_t *h, char *buf)
267 {
268 size_t i;
269 size_t len = 0;
270
271 CDF_UNPACK(h->h_magic);
272 CDF_UNPACKA(h->h_uuid);
273 CDF_UNPACK(h->h_revision);
274 CDF_UNPACK(h->h_version);
275 CDF_UNPACK(h->h_byte_order);
276 CDF_UNPACK(h->h_sec_size_p2);
277 CDF_UNPACK(h->h_short_sec_size_p2);
278 CDF_UNPACKA(h->h_unused0);
279 CDF_UNPACK(h->h_num_sectors_in_sat);
280 CDF_UNPACK(h->h_secid_first_directory);
281 CDF_UNPACKA(h->h_unused1);
282 CDF_UNPACK(h->h_min_size_standard_stream);
283 CDF_UNPACK(h->h_secid_first_sector_in_short_sat);
284 CDF_UNPACK(h->h_num_sectors_in_short_sat);
285 CDF_UNPACK(h->h_secid_first_sector_in_master_sat);
286 CDF_UNPACK(h->h_num_sectors_in_master_sat);
287 for (i = 0; i < __arraycount(h->h_master_sat); i++)
288 CDF_UNPACK(h->h_master_sat[i]);
289 }
290
291 void
cdf_swap_dir(cdf_directory_t * d)292 cdf_swap_dir(cdf_directory_t *d)
293 {
294 d->d_namelen = CDF_TOLE2(d->d_namelen);
295 d->d_left_child = CDF_TOLE4(CAST(uint32_t, d->d_left_child));
296 d->d_right_child = CDF_TOLE4(CAST(uint32_t, d->d_right_child));
297 d->d_storage = CDF_TOLE4(CAST(uint32_t, d->d_storage));
298 d->d_storage_uuid[0] = CDF_TOLE8(d->d_storage_uuid[0]);
299 d->d_storage_uuid[1] = CDF_TOLE8(d->d_storage_uuid[1]);
300 d->d_flags = CDF_TOLE4(d->d_flags);
301 d->d_created = CDF_TOLE8(CAST(uint64_t, d->d_created));
302 d->d_modified = CDF_TOLE8(CAST(uint64_t, d->d_modified));
303 d->d_stream_first_sector = CDF_TOLE4(
304 CAST(uint32_t, d->d_stream_first_sector));
305 d->d_size = CDF_TOLE4(d->d_size);
306 }
307
308 void
cdf_swap_class(cdf_classid_t * d)309 cdf_swap_class(cdf_classid_t *d)
310 {
311 d->cl_dword = CDF_TOLE4(d->cl_dword);
312 d->cl_word[0] = CDF_TOLE2(d->cl_word[0]);
313 d->cl_word[1] = CDF_TOLE2(d->cl_word[1]);
314 }
315
316 void
cdf_unpack_dir(cdf_directory_t * d,char * buf)317 cdf_unpack_dir(cdf_directory_t *d, char *buf)
318 {
319 size_t len = 0;
320
321 CDF_UNPACKA(d->d_name);
322 CDF_UNPACK(d->d_namelen);
323 CDF_UNPACK(d->d_type);
324 CDF_UNPACK(d->d_color);
325 CDF_UNPACK(d->d_left_child);
326 CDF_UNPACK(d->d_right_child);
327 CDF_UNPACK(d->d_storage);
328 CDF_UNPACKA(d->d_storage_uuid);
329 CDF_UNPACK(d->d_flags);
330 CDF_UNPACK(d->d_created);
331 CDF_UNPACK(d->d_modified);
332 CDF_UNPACK(d->d_stream_first_sector);
333 CDF_UNPACK(d->d_size);
334 CDF_UNPACK(d->d_unused0);
335 }
336
337 int
cdf_zero_stream(cdf_stream_t * scn)338 cdf_zero_stream(cdf_stream_t *scn)
339 {
340 scn->sst_len = 0;
341 scn->sst_dirlen = 0;
342 scn->sst_ss = 0;
343 free(scn->sst_tab);
344 scn->sst_tab = NULL;
345 return -1;
346 }
347
348 static size_t
cdf_check_stream(const cdf_stream_t * sst,const cdf_header_t * h)349 cdf_check_stream(const cdf_stream_t *sst, const cdf_header_t *h)
350 {
351 size_t ss = sst->sst_dirlen < h->h_min_size_standard_stream ?
352 CDF_SHORT_SEC_SIZE(h) : CDF_SEC_SIZE(h);
353 assert(ss == sst->sst_ss);
354 return sst->sst_ss;
355 }
356
357 static int
cdf_check_stream_offset(const cdf_stream_t * sst,const cdf_header_t * h,const void * p,size_t tail,int line)358 cdf_check_stream_offset(const cdf_stream_t *sst, const cdf_header_t *h,
359 const void *p, size_t tail, int line)
360 {
361 const char *b = RCAST(const char *, sst->sst_tab);
362 const char *e = RCAST(const char *, p) + tail;
363 size_t ss = cdf_check_stream(sst, h);
364 /*LINTED*/(void)&line;
365 if (e >= b && CAST(size_t, e - b) <= ss * sst->sst_len)
366 return 0;
367 DPRINTF(("%d: offset begin %p < end %p || %" SIZE_T_FORMAT "u"
368 " > %" SIZE_T_FORMAT "u [%" SIZE_T_FORMAT "u %"
369 SIZE_T_FORMAT "u]\n", line, b, e, (size_t)(e - b),
370 ss * sst->sst_len, ss, sst->sst_len));
371 errno = EFTYPE;
372 return -1;
373 }
374
375 static ssize_t
cdf_read(const cdf_info_t * info,off_t off,void * buf,size_t len)376 cdf_read(const cdf_info_t *info, off_t off, void *buf, size_t len)
377 {
378 size_t siz = CAST(size_t, off + len);
379
380 if (CAST(off_t, off + len) != CAST(off_t, siz))
381 goto out;
382
383 if (info->i_buf != NULL && info->i_len >= siz) {
384 (void)memcpy(buf, &info->i_buf[off], len);
385 return CAST(ssize_t, len);
386 }
387
388 if (info->i_fd == -1)
389 goto out;
390
391 if (pread(info->i_fd, buf, len, off) != CAST(ssize_t, len))
392 return -1;
393
394 return CAST(ssize_t, len);
395 out:
396 errno = EINVAL;
397 return -1;
398 }
399
400 int
cdf_read_header(const cdf_info_t * info,cdf_header_t * h)401 cdf_read_header(const cdf_info_t *info, cdf_header_t *h)
402 {
403 char buf[512];
404
405 (void)memcpy(cdf_bo.s, "\01\02\03\04", 4);
406 if (cdf_read(info, CAST(off_t, 0), buf, sizeof(buf)) == -1)
407 return -1;
408 cdf_unpack_header(h, buf);
409 cdf_swap_header(h);
410 if (h->h_magic != CDF_MAGIC) {
411 DPRINTF(("Bad magic %#" INT64_T_FORMAT "x != %#"
412 INT64_T_FORMAT "x\n",
413 (unsigned long long)h->h_magic,
414 (unsigned long long)CDF_MAGIC));
415 goto out;
416 }
417 if (h->h_sec_size_p2 > 20) {
418 DPRINTF(("Bad sector size %hu\n", h->h_sec_size_p2));
419 goto out;
420 }
421 if (h->h_short_sec_size_p2 > 20) {
422 DPRINTF(("Bad short sector size %hu\n",
423 h->h_short_sec_size_p2));
424 goto out;
425 }
426 return 0;
427 out:
428 errno = EFTYPE;
429 return -1;
430 }
431
432
433 ssize_t
cdf_read_sector(const cdf_info_t * info,void * buf,size_t offs,size_t len,const cdf_header_t * h,cdf_secid_t id)434 cdf_read_sector(const cdf_info_t *info, void *buf, size_t offs, size_t len,
435 const cdf_header_t *h, cdf_secid_t id)
436 {
437 size_t ss = CDF_SEC_SIZE(h);
438 size_t pos;
439
440 if (SIZE_T_MAX / ss < CAST(size_t, id))
441 return -1;
442
443 pos = CDF_SEC_POS(h, id);
444 assert(ss == len);
445 return cdf_read(info, CAST(off_t, pos), RCAST(char *, buf) + offs, len);
446 }
447
448 ssize_t
cdf_read_short_sector(const cdf_stream_t * sst,void * buf,size_t offs,size_t len,const cdf_header_t * h,cdf_secid_t id)449 cdf_read_short_sector(const cdf_stream_t *sst, void *buf, size_t offs,
450 size_t len, const cdf_header_t *h, cdf_secid_t id)
451 {
452 size_t ss = CDF_SHORT_SEC_SIZE(h);
453 size_t pos;
454
455 if (SIZE_T_MAX / ss < CAST(size_t, id))
456 return -1;
457
458 pos = CDF_SHORT_SEC_POS(h, id);
459 assert(ss == len);
460 if (pos + len > CDF_SEC_SIZE(h) * sst->sst_len) {
461 DPRINTF(("Out of bounds read %" SIZE_T_FORMAT "u > %"
462 SIZE_T_FORMAT "u\n",
463 pos + len, CDF_SEC_SIZE(h) * sst->sst_len));
464 goto out;
465 }
466 (void)memcpy(RCAST(char *, buf) + offs,
467 RCAST(const char *, sst->sst_tab) + pos, len);
468 return len;
469 out:
470 errno = EFTYPE;
471 return -1;
472 }
473
474 /*
475 * Read the sector allocation table.
476 */
477 int
cdf_read_sat(const cdf_info_t * info,cdf_header_t * h,cdf_sat_t * sat)478 cdf_read_sat(const cdf_info_t *info, cdf_header_t *h, cdf_sat_t *sat)
479 {
480 size_t i, j, k;
481 size_t ss = CDF_SEC_SIZE(h);
482 cdf_secid_t *msa, mid, sec;
483 size_t nsatpersec = (ss / sizeof(mid)) - 1;
484
485 for (i = 0; i < __arraycount(h->h_master_sat); i++)
486 if (h->h_master_sat[i] == CDF_SECID_FREE)
487 break;
488
489 #define CDF_SEC_LIMIT (UINT32_MAX / (64 * ss))
490 if ((nsatpersec > 0 &&
491 h->h_num_sectors_in_master_sat > CDF_SEC_LIMIT / nsatpersec) ||
492 i > CDF_SEC_LIMIT) {
493 DPRINTF(("Number of sectors in master SAT too big %u %"
494 SIZE_T_FORMAT "u\n", h->h_num_sectors_in_master_sat, i));
495 errno = EFTYPE;
496 return -1;
497 }
498
499 sat->sat_len = h->h_num_sectors_in_master_sat * nsatpersec + i;
500 DPRINTF(("sat_len = %" SIZE_T_FORMAT "u ss = %" SIZE_T_FORMAT "u\n",
501 sat->sat_len, ss));
502 if ((sat->sat_tab = CAST(cdf_secid_t *, CDF_CALLOC(sat->sat_len, ss)))
503 == NULL)
504 return -1;
505
506 for (i = 0; i < __arraycount(h->h_master_sat); i++) {
507 if (h->h_master_sat[i] < 0)
508 break;
509 if (cdf_read_sector(info, sat->sat_tab, ss * i, ss, h,
510 h->h_master_sat[i]) != CAST(ssize_t, ss)) {
511 DPRINTF(("Reading sector %d", h->h_master_sat[i]));
512 goto out1;
513 }
514 }
515
516 if ((msa = CAST(cdf_secid_t *, CDF_CALLOC(1, ss))) == NULL)
517 goto out1;
518
519 mid = h->h_secid_first_sector_in_master_sat;
520 for (j = 0; j < h->h_num_sectors_in_master_sat; j++) {
521 if (mid < 0)
522 goto out;
523 if (j >= CDF_LOOP_LIMIT) {
524 DPRINTF(("Reading master sector loop limit"));
525 goto out3;
526 }
527 if (cdf_read_sector(info, msa, 0, ss, h, mid) !=
528 CAST(ssize_t, ss)) {
529 DPRINTF(("Reading master sector %d", mid));
530 goto out2;
531 }
532 for (k = 0; k < nsatpersec; k++, i++) {
533 sec = CDF_TOLE4(CAST(uint32_t, msa[k]));
534 if (sec < 0)
535 goto out;
536 if (i >= sat->sat_len) {
537 DPRINTF(("Out of bounds reading MSA %"
538 SIZE_T_FORMAT "u >= %" SIZE_T_FORMAT "u",
539 i, sat->sat_len));
540 goto out3;
541 }
542 if (cdf_read_sector(info, sat->sat_tab, ss * i, ss, h,
543 sec) != CAST(ssize_t, ss)) {
544 DPRINTF(("Reading sector %d",
545 CDF_TOLE4(msa[k])));
546 goto out2;
547 }
548 }
549 mid = CDF_TOLE4(CAST(uint32_t, msa[nsatpersec]));
550 }
551 out:
552 sat->sat_len = i;
553 free(msa);
554 return 0;
555 out3:
556 errno = EFTYPE;
557 out2:
558 free(msa);
559 out1:
560 free(sat->sat_tab);
561 return -1;
562 }
563
564 size_t
cdf_count_chain(const cdf_sat_t * sat,cdf_secid_t sid,size_t size)565 cdf_count_chain(const cdf_sat_t *sat, cdf_secid_t sid, size_t size)
566 {
567 size_t i, j;
568 cdf_secid_t maxsector = CAST(cdf_secid_t, (sat->sat_len * size)
569 / sizeof(maxsector));
570
571 DPRINTF(("Chain:"));
572 if (sid == CDF_SECID_END_OF_CHAIN) {
573 /* 0-length chain. */
574 DPRINTF((" empty\n"));
575 return 0;
576 }
577
578 for (j = i = 0; sid >= 0; i++, j++) {
579 DPRINTF((" %d", sid));
580 if (j >= CDF_LOOP_LIMIT) {
581 DPRINTF(("Counting chain loop limit"));
582 goto out;
583 }
584 if (sid >= maxsector) {
585 DPRINTF(("Sector %d >= %d\n", sid, maxsector));
586 goto out;
587 }
588 sid = CDF_TOLE4(CAST(uint32_t, sat->sat_tab[sid]));
589 }
590 if (i == 0) {
591 DPRINTF((" none, sid: %d\n", sid));
592 goto out;
593
594 }
595 DPRINTF(("\n"));
596 return i;
597 out:
598 errno = EFTYPE;
599 return CAST(size_t, -1);
600 }
601
602 int
cdf_read_long_sector_chain(const cdf_info_t * info,const cdf_header_t * h,const cdf_sat_t * sat,cdf_secid_t sid,size_t len,cdf_stream_t * scn)603 cdf_read_long_sector_chain(const cdf_info_t *info, const cdf_header_t *h,
604 const cdf_sat_t *sat, cdf_secid_t sid, size_t len, cdf_stream_t *scn)
605 {
606 size_t ss = CDF_SEC_SIZE(h), i, j;
607 ssize_t nr;
608 scn->sst_tab = NULL;
609 scn->sst_len = cdf_count_chain(sat, sid, ss);
610 scn->sst_dirlen = MAX(h->h_min_size_standard_stream, len);
611 scn->sst_ss = ss;
612
613 if (sid == CDF_SECID_END_OF_CHAIN || len == 0)
614 return cdf_zero_stream(scn);
615
616 if (scn->sst_len == CAST(size_t, -1))
617 goto out;
618
619 scn->sst_tab = CDF_CALLOC(scn->sst_len, ss);
620 if (scn->sst_tab == NULL)
621 return cdf_zero_stream(scn);
622
623 for (j = i = 0; sid >= 0; i++, j++) {
624 if (j >= CDF_LOOP_LIMIT) {
625 DPRINTF(("Read long sector chain loop limit"));
626 goto out;
627 }
628 if (i >= scn->sst_len) {
629 DPRINTF(("Out of bounds reading long sector chain "
630 "%" SIZE_T_FORMAT "u > %" SIZE_T_FORMAT "u\n", i,
631 scn->sst_len));
632 goto out;
633 }
634 if ((nr = cdf_read_sector(info, scn->sst_tab, i * ss, ss, h,
635 sid)) != CAST(ssize_t, ss)) {
636 if (i == scn->sst_len - 1 && nr > 0) {
637 /* Last sector might be truncated */
638 return 0;
639 }
640 DPRINTF(("Reading long sector chain %d", sid));
641 goto out;
642 }
643 sid = CDF_TOLE4(CAST(uint32_t, sat->sat_tab[sid]));
644 }
645 return 0;
646 out:
647 errno = EFTYPE;
648 return cdf_zero_stream(scn);
649 }
650
651 int
cdf_read_short_sector_chain(const cdf_header_t * h,const cdf_sat_t * ssat,const cdf_stream_t * sst,cdf_secid_t sid,size_t len,cdf_stream_t * scn)652 cdf_read_short_sector_chain(const cdf_header_t *h,
653 const cdf_sat_t *ssat, const cdf_stream_t *sst,
654 cdf_secid_t sid, size_t len, cdf_stream_t *scn)
655 {
656 size_t ss = CDF_SHORT_SEC_SIZE(h), i, j;
657 scn->sst_tab = NULL;
658 scn->sst_len = cdf_count_chain(ssat, sid, CDF_SEC_SIZE(h));
659 scn->sst_dirlen = len;
660 scn->sst_ss = ss;
661
662 if (scn->sst_len == CAST(size_t, -1))
663 goto out;
664
665 scn->sst_tab = CDF_CALLOC(scn->sst_len, ss);
666 if (scn->sst_tab == NULL)
667 return cdf_zero_stream(scn);
668
669 for (j = i = 0; sid >= 0; i++, j++) {
670 if (j >= CDF_LOOP_LIMIT) {
671 DPRINTF(("Read short sector chain loop limit"));
672 goto out;
673 }
674 if (i >= scn->sst_len) {
675 DPRINTF(("Out of bounds reading short sector chain "
676 "%" SIZE_T_FORMAT "u > %" SIZE_T_FORMAT "u\n",
677 i, scn->sst_len));
678 goto out;
679 }
680 if (cdf_read_short_sector(sst, scn->sst_tab, i * ss, ss, h,
681 sid) != CAST(ssize_t, ss)) {
682 DPRINTF(("Reading short sector chain %d", sid));
683 goto out;
684 }
685 sid = CDF_TOLE4(CAST(uint32_t, ssat->sat_tab[sid]));
686 }
687 return 0;
688 out:
689 errno = EFTYPE;
690 return cdf_zero_stream(scn);
691 }
692
693 int
cdf_read_sector_chain(const cdf_info_t * info,const cdf_header_t * h,const cdf_sat_t * sat,const cdf_sat_t * ssat,const cdf_stream_t * sst,cdf_secid_t sid,size_t len,cdf_stream_t * scn)694 cdf_read_sector_chain(const cdf_info_t *info, const cdf_header_t *h,
695 const cdf_sat_t *sat, const cdf_sat_t *ssat, const cdf_stream_t *sst,
696 cdf_secid_t sid, size_t len, cdf_stream_t *scn)
697 {
698
699 if (len < h->h_min_size_standard_stream && sst->sst_tab != NULL)
700 return cdf_read_short_sector_chain(h, ssat, sst, sid, len,
701 scn);
702 else
703 return cdf_read_long_sector_chain(info, h, sat, sid, len, scn);
704 }
705
706 int
cdf_read_dir(const cdf_info_t * info,const cdf_header_t * h,const cdf_sat_t * sat,cdf_dir_t * dir)707 cdf_read_dir(const cdf_info_t *info, const cdf_header_t *h,
708 const cdf_sat_t *sat, cdf_dir_t *dir)
709 {
710 size_t i, j;
711 size_t ss = CDF_SEC_SIZE(h), ns, nd;
712 char *buf;
713 cdf_secid_t sid = h->h_secid_first_directory;
714
715 ns = cdf_count_chain(sat, sid, ss);
716 if (ns == CAST(size_t, -1))
717 return -1;
718
719 nd = ss / CDF_DIRECTORY_SIZE;
720
721 dir->dir_len = ns * nd;
722 dir->dir_tab = CAST(cdf_directory_t *,
723 CDF_CALLOC(dir->dir_len, sizeof(dir->dir_tab[0])));
724 if (dir->dir_tab == NULL)
725 return -1;
726
727 if ((buf = CAST(char *, CDF_MALLOC(ss))) == NULL) {
728 free(dir->dir_tab);
729 return -1;
730 }
731
732 for (j = i = 0; i < ns; i++, j++) {
733 if (j >= CDF_LOOP_LIMIT) {
734 DPRINTF(("Read dir loop limit"));
735 goto out;
736 }
737 if (cdf_read_sector(info, buf, 0, ss, h, sid) !=
738 CAST(ssize_t, ss)) {
739 DPRINTF(("Reading directory sector %d", sid));
740 goto out;
741 }
742 for (j = 0; j < nd; j++) {
743 cdf_unpack_dir(&dir->dir_tab[i * nd + j],
744 &buf[j * CDF_DIRECTORY_SIZE]);
745 }
746 sid = CDF_TOLE4(CAST(uint32_t, sat->sat_tab[sid]));
747 }
748 if (NEED_SWAP)
749 for (i = 0; i < dir->dir_len; i++)
750 cdf_swap_dir(&dir->dir_tab[i]);
751 free(buf);
752 return 0;
753 out:
754 free(dir->dir_tab);
755 free(buf);
756 errno = EFTYPE;
757 return -1;
758 }
759
760
761 int
cdf_read_ssat(const cdf_info_t * info,const cdf_header_t * h,const cdf_sat_t * sat,cdf_sat_t * ssat)762 cdf_read_ssat(const cdf_info_t *info, const cdf_header_t *h,
763 const cdf_sat_t *sat, cdf_sat_t *ssat)
764 {
765 size_t i, j;
766 size_t ss = CDF_SEC_SIZE(h);
767 cdf_secid_t sid = h->h_secid_first_sector_in_short_sat;
768
769 ssat->sat_tab = NULL;
770 ssat->sat_len = cdf_count_chain(sat, sid, ss);
771 if (ssat->sat_len == CAST(size_t, -1))
772 goto out;
773
774 ssat->sat_tab = CAST(cdf_secid_t *, CDF_CALLOC(ssat->sat_len, ss));
775 if (ssat->sat_tab == NULL)
776 goto out1;
777
778 for (j = i = 0; sid >= 0; i++, j++) {
779 if (j >= CDF_LOOP_LIMIT) {
780 DPRINTF(("Read short sat sector loop limit"));
781 goto out;
782 }
783 if (i >= ssat->sat_len) {
784 DPRINTF(("Out of bounds reading short sector chain "
785 "%" SIZE_T_FORMAT "u > %" SIZE_T_FORMAT "u\n", i,
786 ssat->sat_len));
787 goto out;
788 }
789 if (cdf_read_sector(info, ssat->sat_tab, i * ss, ss, h, sid) !=
790 CAST(ssize_t, ss)) {
791 DPRINTF(("Reading short sat sector %d", sid));
792 goto out1;
793 }
794 sid = CDF_TOLE4(CAST(uint32_t, sat->sat_tab[sid]));
795 }
796 return 0;
797 out:
798 errno = EFTYPE;
799 out1:
800 free(ssat->sat_tab);
801 return -1;
802 }
803
804 int
cdf_read_short_stream(const cdf_info_t * info,const cdf_header_t * h,const cdf_sat_t * sat,const cdf_dir_t * dir,cdf_stream_t * scn,const cdf_directory_t ** root)805 cdf_read_short_stream(const cdf_info_t *info, const cdf_header_t *h,
806 const cdf_sat_t *sat, const cdf_dir_t *dir, cdf_stream_t *scn,
807 const cdf_directory_t **root)
808 {
809 size_t i;
810 const cdf_directory_t *d;
811
812 *root = NULL;
813 for (i = 0; i < dir->dir_len; i++)
814 if (dir->dir_tab[i].d_type == CDF_DIR_TYPE_ROOT_STORAGE)
815 break;
816
817 /* If the it is not there, just fake it; some docs don't have it */
818 if (i == dir->dir_len) {
819 DPRINTF(("Cannot find root storage dir\n"));
820 goto out;
821 }
822 d = &dir->dir_tab[i];
823 *root = d;
824
825 /* If the it is not there, just fake it; some docs don't have it */
826 if (d->d_stream_first_sector < 0) {
827 DPRINTF(("No first secror in dir\n"));
828 goto out;
829 }
830
831 return cdf_read_long_sector_chain(info, h, sat,
832 d->d_stream_first_sector, d->d_size, scn);
833 out:
834 scn->sst_tab = NULL;
835 (void)cdf_zero_stream(scn);
836 return 0;
837 }
838
839 static int
cdf_namecmp(const char * d,const uint16_t * s,size_t l)840 cdf_namecmp(const char *d, const uint16_t *s, size_t l)
841 {
842 for (; l--; d++, s++)
843 if (*d != CDF_TOLE2(*s))
844 return CAST(unsigned char, *d) - CDF_TOLE2(*s);
845 return 0;
846 }
847
848 int
cdf_read_doc_summary_info(const cdf_info_t * info,const cdf_header_t * h,const cdf_sat_t * sat,const cdf_sat_t * ssat,const cdf_stream_t * sst,const cdf_dir_t * dir,cdf_stream_t * scn)849 cdf_read_doc_summary_info(const cdf_info_t *info, const cdf_header_t *h,
850 const cdf_sat_t *sat, const cdf_sat_t *ssat, const cdf_stream_t *sst,
851 const cdf_dir_t *dir, cdf_stream_t *scn)
852 {
853 return cdf_read_user_stream(info, h, sat, ssat, sst, dir,
854 "\05DocumentSummaryInformation", scn);
855 }
856
857 int
cdf_read_summary_info(const cdf_info_t * info,const cdf_header_t * h,const cdf_sat_t * sat,const cdf_sat_t * ssat,const cdf_stream_t * sst,const cdf_dir_t * dir,cdf_stream_t * scn)858 cdf_read_summary_info(const cdf_info_t *info, const cdf_header_t *h,
859 const cdf_sat_t *sat, const cdf_sat_t *ssat, const cdf_stream_t *sst,
860 const cdf_dir_t *dir, cdf_stream_t *scn)
861 {
862 return cdf_read_user_stream(info, h, sat, ssat, sst, dir,
863 "\05SummaryInformation", scn);
864 }
865
866 int
cdf_read_user_stream(const cdf_info_t * info,const cdf_header_t * h,const cdf_sat_t * sat,const cdf_sat_t * ssat,const cdf_stream_t * sst,const cdf_dir_t * dir,const char * name,cdf_stream_t * scn)867 cdf_read_user_stream(const cdf_info_t *info, const cdf_header_t *h,
868 const cdf_sat_t *sat, const cdf_sat_t *ssat, const cdf_stream_t *sst,
869 const cdf_dir_t *dir, const char *name, cdf_stream_t *scn)
870 {
871 const cdf_directory_t *d;
872 int i = cdf_find_stream(dir, name, CDF_DIR_TYPE_USER_STREAM);
873
874 if (i <= 0) {
875 memset(scn, 0, sizeof(*scn));
876 return -1;
877 }
878
879 d = &dir->dir_tab[i - 1];
880 return cdf_read_sector_chain(info, h, sat, ssat, sst,
881 d->d_stream_first_sector, d->d_size, scn);
882 }
883
884 int
cdf_find_stream(const cdf_dir_t * dir,const char * name,int type)885 cdf_find_stream(const cdf_dir_t *dir, const char *name, int type)
886 {
887 size_t i, name_len = strlen(name) + 1;
888
889 for (i = dir->dir_len; i > 0; i--)
890 if (dir->dir_tab[i - 1].d_type == type &&
891 cdf_namecmp(name, dir->dir_tab[i - 1].d_name, name_len)
892 == 0)
893 break;
894 if (i > 0)
895 return CAST(int, i);
896
897 DPRINTF(("Cannot find type %d `%s'\n", type, name));
898 errno = ESRCH;
899 return 0;
900 }
901
902 #define CDF_SHLEN_LIMIT (UINT32_MAX / 64)
903 #define CDF_PROP_LIMIT (UINT32_MAX / (64 * sizeof(cdf_property_info_t)))
904
905 static const void *
cdf_offset(const void * p,size_t l)906 cdf_offset(const void *p, size_t l)
907 {
908 return CAST(const void *, CAST(const uint8_t *, p) + l);
909 }
910
911 static const uint8_t *
cdf_get_property_info_pos(const cdf_stream_t * sst,const cdf_header_t * h,const uint8_t * p,const uint8_t * e,size_t i)912 cdf_get_property_info_pos(const cdf_stream_t *sst, const cdf_header_t *h,
913 const uint8_t *p, const uint8_t *e, size_t i)
914 {
915 size_t tail = (i << 1) + 1;
916 size_t ofs;
917
918 if (p >= e) {
919 DPRINTF(("Past end %p < %p\n", e, p));
920 return NULL;
921 }
922
923 if (cdf_check_stream_offset(sst, h, p, (tail + 1) * sizeof(uint32_t),
924 __LINE__) == -1)
925 return NULL;
926
927 ofs = CDF_GETUINT32(p, tail);
928 if (ofs < 2 * sizeof(uint32_t)) {
929 DPRINTF(("Offset too small %zu\n", ofs));
930 return NULL;
931 }
932
933 ofs -= 2 * sizeof(uint32_t);
934 if (ofs > CAST(size_t, e - p)) {
935 DPRINTF(("Offset too big %zu %td\n", ofs, e - p));
936 return NULL;
937 }
938
939 return CAST(const uint8_t *, cdf_offset(CAST(const void *, p), ofs));
940 }
941
942 static cdf_property_info_t *
cdf_grow_info(cdf_property_info_t ** info,size_t * maxcount,size_t incr)943 cdf_grow_info(cdf_property_info_t **info, size_t *maxcount, size_t incr)
944 {
945 cdf_property_info_t *inp;
946 size_t newcount = *maxcount + incr;
947
948 if (newcount > CDF_PROP_LIMIT) {
949 DPRINTF(("exceeded property limit %" SIZE_T_FORMAT "u > %"
950 SIZE_T_FORMAT "u\n", newcount, CDF_PROP_LIMIT));
951 goto out;
952 }
953 inp = CAST(cdf_property_info_t *,
954 CDF_REALLOC(*info, newcount * sizeof(*inp)));
955 if (inp == NULL)
956 goto out;
957
958 *info = inp;
959 *maxcount = newcount;
960 return inp;
961 out:
962 free(*info);
963 *maxcount = 0;
964 *info = NULL;
965 return NULL;
966 }
967
968 static int
cdf_copy_info(cdf_property_info_t * inp,const void * p,const void * e,size_t len)969 cdf_copy_info(cdf_property_info_t *inp, const void *p, const void *e,
970 size_t len)
971 {
972 if (inp->pi_type & CDF_VECTOR)
973 return 0;
974
975 if (CAST(size_t, CAST(const char *, e) - CAST(const char *, p)) < len)
976 return 0;
977
978 (void)memcpy(&inp->pi_val, p, len);
979
980 switch (len) {
981 case 2:
982 inp->pi_u16 = CDF_TOLE2(inp->pi_u16);
983 break;
984 case 4:
985 inp->pi_u32 = CDF_TOLE4(inp->pi_u32);
986 break;
987 case 8:
988 inp->pi_u64 = CDF_TOLE8(inp->pi_u64);
989 break;
990 default:
991 abort();
992 }
993 return 1;
994 }
995
996 int
cdf_read_property_info(const cdf_stream_t * sst,const cdf_header_t * h,uint32_t offs,cdf_property_info_t ** info,size_t * count,size_t * maxcount)997 cdf_read_property_info(const cdf_stream_t *sst, const cdf_header_t *h,
998 uint32_t offs, cdf_property_info_t **info, size_t *count, size_t *maxcount)
999 {
1000 const cdf_section_header_t *shp;
1001 cdf_section_header_t sh;
1002 const uint8_t *p, *q, *e;
1003 size_t i, o4, nelements, j, slen, left;
1004 cdf_property_info_t *inp;
1005
1006 if (offs > UINT32_MAX / 4) {
1007 errno = EFTYPE;
1008 goto out;
1009 }
1010 shp = CAST(const cdf_section_header_t *,
1011 cdf_offset(sst->sst_tab, offs));
1012 if (cdf_check_stream_offset(sst, h, shp, sizeof(*shp), __LINE__) == -1)
1013 goto out;
1014 sh.sh_len = CDF_TOLE4(shp->sh_len);
1015 if (sh.sh_len > CDF_SHLEN_LIMIT) {
1016 errno = EFTYPE;
1017 goto out;
1018 }
1019
1020 if (cdf_check_stream_offset(sst, h, shp, sh.sh_len, __LINE__) == -1)
1021 goto out;
1022
1023 sh.sh_properties = CDF_TOLE4(shp->sh_properties);
1024 DPRINTF(("section len: %u properties %u\n", sh.sh_len,
1025 sh.sh_properties));
1026 if (sh.sh_properties > CDF_PROP_LIMIT)
1027 goto out;
1028 inp = cdf_grow_info(info, maxcount, sh.sh_properties);
1029 if (inp == NULL)
1030 goto out;
1031 inp += *count;
1032 *count += sh.sh_properties;
1033 p = CAST(const uint8_t *, cdf_offset(sst->sst_tab, offs + sizeof(sh)));
1034 e = CAST(const uint8_t *, cdf_offset(shp, sh.sh_len));
1035 if (p >= e || cdf_check_stream_offset(sst, h, e, 0, __LINE__) == -1)
1036 goto out;
1037
1038 for (i = 0; i < sh.sh_properties; i++) {
1039 if ((q = cdf_get_property_info_pos(sst, h, p, e, i)) == NULL)
1040 goto out;
1041 inp[i].pi_id = CDF_GETUINT32(p, i << 1);
1042 left = CAST(size_t, e - q);
1043 if (left < sizeof(uint32_t)) {
1044 DPRINTF(("short info (no type)_\n"));
1045 goto out;
1046 }
1047 inp[i].pi_type = CDF_GETUINT32(q, 0);
1048 DPRINTF(("%" SIZE_T_FORMAT "u) id=%#x type=%#x offs=%#tx,%#x\n",
1049 i, inp[i].pi_id, inp[i].pi_type, q - p, offs));
1050 if (inp[i].pi_type & CDF_VECTOR) {
1051 if (left < sizeof(uint32_t) * 2) {
1052 DPRINTF(("missing CDF_VECTOR length\n"));
1053 goto out;
1054 }
1055 nelements = CDF_GETUINT32(q, 1);
1056 if (nelements > CDF_ELEMENT_LIMIT || nelements == 0) {
1057 DPRINTF(("CDF_VECTOR with nelements == %"
1058 SIZE_T_FORMAT "u\n", nelements));
1059 goto out;
1060 }
1061 slen = 2;
1062 } else {
1063 nelements = 1;
1064 slen = 1;
1065 }
1066 o4 = slen * sizeof(uint32_t);
1067 if (inp[i].pi_type & (CDF_ARRAY|CDF_BYREF|CDF_RESERVED))
1068 goto unknown;
1069 switch (inp[i].pi_type & CDF_TYPEMASK) {
1070 case CDF_NULL:
1071 case CDF_EMPTY:
1072 break;
1073 case CDF_SIGNED16:
1074 if (!cdf_copy_info(&inp[i], &q[o4], e, sizeof(int16_t)))
1075 goto unknown;
1076 break;
1077 case CDF_SIGNED32:
1078 case CDF_BOOL:
1079 case CDF_UNSIGNED32:
1080 case CDF_FLOAT:
1081 if (!cdf_copy_info(&inp[i], &q[o4], e, sizeof(int32_t)))
1082 goto unknown;
1083 break;
1084 case CDF_SIGNED64:
1085 case CDF_UNSIGNED64:
1086 case CDF_DOUBLE:
1087 case CDF_FILETIME:
1088 if (!cdf_copy_info(&inp[i], &q[o4], e, sizeof(int64_t)))
1089 goto unknown;
1090 break;
1091 case CDF_LENGTH32_STRING:
1092 case CDF_LENGTH32_WSTRING:
1093 if (nelements > 1) {
1094 size_t nelem = inp - *info;
1095 inp = cdf_grow_info(info, maxcount, nelements);
1096 if (inp == NULL)
1097 goto out;
1098 inp += nelem;
1099 }
1100 for (j = 0; j < nelements && i < sh.sh_properties;
1101 j++, i++)
1102 {
1103 uint32_t l;
1104
1105 if (o4 + sizeof(uint32_t) > left)
1106 goto out;
1107
1108 l = CDF_GETUINT32(q, slen);
1109 o4 += sizeof(uint32_t);
1110 if (o4 + l > left)
1111 goto out;
1112
1113 inp[i].pi_str.s_len = l;
1114 inp[i].pi_str.s_buf = CAST(const char *,
1115 CAST(const void *, &q[o4]));
1116
1117 DPRINTF(("o=%" SIZE_T_FORMAT "u l=%d(%"
1118 SIZE_T_FORMAT "u), t=%" SIZE_T_FORMAT
1119 "u s=%.*s\n", o4, l,
1120 CDF_ROUND(l, sizeof(l)),
1121 left, (int)l, inp[i].pi_str.s_buf));
1122
1123 if (l & 1)
1124 l++;
1125
1126 slen += l >> 1;
1127 o4 = slen * sizeof(uint32_t);
1128 }
1129 i--;
1130 break;
1131 case CDF_CLIPBOARD:
1132 if (inp[i].pi_type & CDF_VECTOR)
1133 goto unknown;
1134 break;
1135 default:
1136 unknown:
1137 memset(&inp[i].pi_val, 0, sizeof(inp[i].pi_val));
1138 DPRINTF(("Don't know how to deal with %#x\n",
1139 inp[i].pi_type));
1140 break;
1141 }
1142 }
1143 return 0;
1144 out:
1145 free(*info);
1146 *info = NULL;
1147 *count = 0;
1148 *maxcount = 0;
1149 errno = EFTYPE;
1150 return -1;
1151 }
1152
1153 int
cdf_unpack_summary_info(const cdf_stream_t * sst,const cdf_header_t * h,cdf_summary_info_header_t * ssi,cdf_property_info_t ** info,size_t * count)1154 cdf_unpack_summary_info(const cdf_stream_t *sst, const cdf_header_t *h,
1155 cdf_summary_info_header_t *ssi, cdf_property_info_t **info, size_t *count)
1156 {
1157 size_t maxcount;
1158 const cdf_summary_info_header_t *si =
1159 CAST(const cdf_summary_info_header_t *, sst->sst_tab);
1160 const cdf_section_declaration_t *sd =
1161 CAST(const cdf_section_declaration_t *, RCAST(const void *,
1162 RCAST(const char *, sst->sst_tab)
1163 + CDF_SECTION_DECLARATION_OFFSET));
1164
1165 if (cdf_check_stream_offset(sst, h, si, sizeof(*si), __LINE__) == -1 ||
1166 cdf_check_stream_offset(sst, h, sd, sizeof(*sd), __LINE__) == -1)
1167 return -1;
1168 ssi->si_byte_order = CDF_TOLE2(si->si_byte_order);
1169 ssi->si_os_version = CDF_TOLE2(si->si_os_version);
1170 ssi->si_os = CDF_TOLE2(si->si_os);
1171 ssi->si_class = si->si_class;
1172 cdf_swap_class(&ssi->si_class);
1173 ssi->si_count = CDF_TOLE4(si->si_count);
1174 *count = 0;
1175 maxcount = 0;
1176 *info = NULL;
1177 if (cdf_read_property_info(sst, h, CDF_TOLE4(sd->sd_offset), info,
1178 count, &maxcount) == -1)
1179 return -1;
1180 return 0;
1181 }
1182
1183
1184 #define extract_catalog_field(t, f, l) \
1185 if (b + l + sizeof(cep->f) > eb) { \
1186 cep->ce_namlen = 0; \
1187 break; \
1188 } \
1189 memcpy(&cep->f, b + (l), sizeof(cep->f)); \
1190 ce[i].f = CAST(t, CDF_TOLE(cep->f))
1191
1192 int
cdf_unpack_catalog(const cdf_header_t * h,const cdf_stream_t * sst,cdf_catalog_t ** cat)1193 cdf_unpack_catalog(const cdf_header_t *h, const cdf_stream_t *sst,
1194 cdf_catalog_t **cat)
1195 {
1196 size_t ss = cdf_check_stream(sst, h);
1197 const char *b = CAST(const char *, sst->sst_tab);
1198 const char *nb, *eb = b + ss * sst->sst_len;
1199 size_t nr, i, j, k;
1200 cdf_catalog_entry_t *ce;
1201 uint16_t reclen;
1202 const uint16_t *np;
1203
1204 for (nr = 0;; nr++) {
1205 memcpy(&reclen, b, sizeof(reclen));
1206 reclen = CDF_TOLE2(reclen);
1207 if (reclen == 0)
1208 break;
1209 b += reclen;
1210 if (b > eb)
1211 break;
1212 }
1213 if (nr == 0)
1214 return -1;
1215 nr--;
1216 *cat = CAST(cdf_catalog_t *,
1217 CDF_MALLOC(sizeof(cdf_catalog_t) + nr * sizeof(*ce)));
1218 if (*cat == NULL)
1219 return -1;
1220 ce = (*cat)->cat_e;
1221 memset(ce, 0, nr * sizeof(*ce));
1222 b = CAST(const char *, sst->sst_tab);
1223 for (j = i = 0; i < nr; b += reclen) {
1224 cdf_catalog_entry_t *cep = &ce[j];
1225 uint16_t rlen;
1226
1227 extract_catalog_field(uint16_t, ce_namlen, 0);
1228 extract_catalog_field(uint16_t, ce_num, 4);
1229 extract_catalog_field(uint64_t, ce_timestamp, 8);
1230 reclen = cep->ce_namlen;
1231
1232 if (reclen < 14) {
1233 cep->ce_namlen = 0;
1234 continue;
1235 }
1236
1237 cep->ce_namlen = __arraycount(cep->ce_name) - 1;
1238 rlen = reclen - 14;
1239 if (cep->ce_namlen > rlen)
1240 cep->ce_namlen = rlen;
1241
1242 np = CAST(const uint16_t *, CAST(const void *, (b + 16)));
1243 nb = CAST(const char *, CAST(const void *,
1244 (np + cep->ce_namlen)));
1245 if (nb > eb) {
1246 cep->ce_namlen = 0;
1247 break;
1248 }
1249
1250 for (k = 0; k < cep->ce_namlen; k++)
1251 cep->ce_name[k] = np[k]; /* XXX: CDF_TOLE2? */
1252 cep->ce_name[cep->ce_namlen] = 0;
1253 j = i;
1254 i++;
1255 }
1256 (*cat)->cat_num = j;
1257 return 0;
1258 }
1259
1260 int
cdf_print_classid(char * buf,size_t buflen,const cdf_classid_t * id)1261 cdf_print_classid(char *buf, size_t buflen, const cdf_classid_t *id)
1262 {
1263 return snprintf(buf, buflen, "%.8x-%.4x-%.4x-%.2x%.2x-"
1264 "%.2x%.2x%.2x%.2x%.2x%.2x", id->cl_dword, id->cl_word[0],
1265 id->cl_word[1], id->cl_two[0], id->cl_two[1], id->cl_six[0],
1266 id->cl_six[1], id->cl_six[2], id->cl_six[3], id->cl_six[4],
1267 id->cl_six[5]);
1268 }
1269
1270 static const struct {
1271 uint32_t v;
1272 const char *n;
1273 } vn[] = {
1274 { CDF_PROPERTY_CODE_PAGE, "Code page" },
1275 { CDF_PROPERTY_TITLE, "Title" },
1276 { CDF_PROPERTY_SUBJECT, "Subject" },
1277 { CDF_PROPERTY_AUTHOR, "Author" },
1278 { CDF_PROPERTY_KEYWORDS, "Keywords" },
1279 { CDF_PROPERTY_COMMENTS, "Comments" },
1280 { CDF_PROPERTY_TEMPLATE, "Template" },
1281 { CDF_PROPERTY_LAST_SAVED_BY, "Last Saved By" },
1282 { CDF_PROPERTY_REVISION_NUMBER, "Revision Number" },
1283 { CDF_PROPERTY_TOTAL_EDITING_TIME, "Total Editing Time" },
1284 { CDF_PROPERTY_LAST_PRINTED, "Last Printed" },
1285 { CDF_PROPERTY_CREATE_TIME, "Create Time/Date" },
1286 { CDF_PROPERTY_LAST_SAVED_TIME, "Last Saved Time/Date" },
1287 { CDF_PROPERTY_NUMBER_OF_PAGES, "Number of Pages" },
1288 { CDF_PROPERTY_NUMBER_OF_WORDS, "Number of Words" },
1289 { CDF_PROPERTY_NUMBER_OF_CHARACTERS, "Number of Characters" },
1290 { CDF_PROPERTY_THUMBNAIL, "Thumbnail" },
1291 { CDF_PROPERTY_NAME_OF_APPLICATION, "Name of Creating Application" },
1292 { CDF_PROPERTY_SECURITY, "Security" },
1293 { CDF_PROPERTY_LOCALE_ID, "Locale ID" },
1294 };
1295
1296 int
cdf_print_property_name(char * buf,size_t bufsiz,uint32_t p)1297 cdf_print_property_name(char *buf, size_t bufsiz, uint32_t p)
1298 {
1299 size_t i;
1300
1301 for (i = 0; i < __arraycount(vn); i++)
1302 if (vn[i].v == p)
1303 return snprintf(buf, bufsiz, "%s", vn[i].n);
1304 return snprintf(buf, bufsiz, "%#x", p);
1305 }
1306
1307 int
cdf_print_elapsed_time(char * buf,size_t bufsiz,cdf_timestamp_t ts)1308 cdf_print_elapsed_time(char *buf, size_t bufsiz, cdf_timestamp_t ts)
1309 {
1310 int len = 0;
1311 int days, hours, mins, secs;
1312
1313 ts /= CDF_TIME_PREC;
1314 secs = CAST(int, ts % 60);
1315 ts /= 60;
1316 mins = CAST(int, ts % 60);
1317 ts /= 60;
1318 hours = CAST(int, ts % 24);
1319 ts /= 24;
1320 days = CAST(int, ts);
1321
1322 if (days) {
1323 len += snprintf(buf + len, bufsiz - len, "%dd+", days);
1324 if (CAST(size_t, len) >= bufsiz)
1325 return len;
1326 }
1327
1328 if (days || hours) {
1329 len += snprintf(buf + len, bufsiz - len, "%.2d:", hours);
1330 if (CAST(size_t, len) >= bufsiz)
1331 return len;
1332 }
1333
1334 len += snprintf(buf + len, bufsiz - len, "%.2d:", mins);
1335 if (CAST(size_t, len) >= bufsiz)
1336 return len;
1337
1338 len += snprintf(buf + len, bufsiz - len, "%.2d", secs);
1339 return len;
1340 }
1341
1342 char *
cdf_u16tos8(char * buf,size_t len,const uint16_t * p)1343 cdf_u16tos8(char *buf, size_t len, const uint16_t *p)
1344 {
1345 size_t i;
1346 for (i = 0; i < len && p[i]; i++)
1347 buf[i] = CAST(char, p[i]);
1348 buf[i] = '\0';
1349 return buf;
1350 }
1351
1352 #ifdef CDF_DEBUG
1353 void
cdf_dump_header(const cdf_header_t * h)1354 cdf_dump_header(const cdf_header_t *h)
1355 {
1356 size_t i;
1357
1358 #define DUMP(a, b) (void)fprintf(stderr, "%40.40s = " a "\n", # b, h->h_ ## b)
1359 #define DUMP2(a, b) (void)fprintf(stderr, "%40.40s = " a " (" a ")\n", # b, \
1360 h->h_ ## b, 1 << h->h_ ## b)
1361 DUMP("%d", revision);
1362 DUMP("%d", version);
1363 DUMP("%#x", byte_order);
1364 DUMP2("%d", sec_size_p2);
1365 DUMP2("%d", short_sec_size_p2);
1366 DUMP("%d", num_sectors_in_sat);
1367 DUMP("%d", secid_first_directory);
1368 DUMP("%d", min_size_standard_stream);
1369 DUMP("%d", secid_first_sector_in_short_sat);
1370 DUMP("%d", num_sectors_in_short_sat);
1371 DUMP("%d", secid_first_sector_in_master_sat);
1372 DUMP("%d", num_sectors_in_master_sat);
1373 for (i = 0; i < __arraycount(h->h_master_sat); i++) {
1374 if (h->h_master_sat[i] == CDF_SECID_FREE)
1375 break;
1376 (void)fprintf(stderr, "%35.35s[%.3" SIZE_T_FORMAT "u] = %d\n",
1377 "master_sat", i, h->h_master_sat[i]);
1378 }
1379 }
1380
1381 void
cdf_dump_sat(const char * prefix,const cdf_sat_t * sat,size_t size)1382 cdf_dump_sat(const char *prefix, const cdf_sat_t *sat, size_t size)
1383 {
1384 size_t i, j, s = size / sizeof(cdf_secid_t);
1385
1386 for (i = 0; i < sat->sat_len; i++) {
1387 (void)fprintf(stderr, "%s[%" SIZE_T_FORMAT "u]:\n%.6"
1388 SIZE_T_FORMAT "u: ", prefix, i, i * s);
1389 for (j = 0; j < s; j++) {
1390 (void)fprintf(stderr, "%5d, ",
1391 CDF_TOLE4(sat->sat_tab[s * i + j]));
1392 if ((j + 1) % 10 == 0)
1393 (void)fprintf(stderr, "\n%.6" SIZE_T_FORMAT
1394 "u: ", i * s + j + 1);
1395 }
1396 (void)fprintf(stderr, "\n");
1397 }
1398 }
1399
1400 void
cdf_dump(const void * v,size_t len)1401 cdf_dump(const void *v, size_t len)
1402 {
1403 size_t i, j;
1404 const unsigned char *p = v;
1405 char abuf[16];
1406
1407 (void)fprintf(stderr, "%.4x: ", 0);
1408 for (i = 0, j = 0; i < len; i++, p++) {
1409 (void)fprintf(stderr, "%.2x ", *p);
1410 abuf[j++] = isprint(*p) ? *p : '.';
1411 if (j == 16) {
1412 j = 0;
1413 abuf[15] = '\0';
1414 (void)fprintf(stderr, "%s\n%.4" SIZE_T_FORMAT "x: ",
1415 abuf, i + 1);
1416 }
1417 }
1418 (void)fprintf(stderr, "\n");
1419 }
1420
1421 void
cdf_dump_stream(const cdf_stream_t * sst)1422 cdf_dump_stream(const cdf_stream_t *sst)
1423 {
1424 size_t ss = sst->sst_ss;
1425 cdf_dump(sst->sst_tab, ss * sst->sst_len);
1426 }
1427
1428 void
cdf_dump_dir(const cdf_info_t * info,const cdf_header_t * h,const cdf_sat_t * sat,const cdf_sat_t * ssat,const cdf_stream_t * sst,const cdf_dir_t * dir)1429 cdf_dump_dir(const cdf_info_t *info, const cdf_header_t *h,
1430 const cdf_sat_t *sat, const cdf_sat_t *ssat, const cdf_stream_t *sst,
1431 const cdf_dir_t *dir)
1432 {
1433 size_t i, j;
1434 cdf_directory_t *d;
1435 char name[__arraycount(d->d_name)];
1436 cdf_stream_t scn;
1437 struct timespec ts;
1438
1439 static const char *types[] = { "empty", "user storage",
1440 "user stream", "lockbytes", "property", "root storage" };
1441
1442 for (i = 0; i < dir->dir_len; i++) {
1443 char buf[26];
1444 d = &dir->dir_tab[i];
1445 for (j = 0; j < sizeof(name); j++)
1446 name[j] = (char)CDF_TOLE2(d->d_name[j]);
1447 (void)fprintf(stderr, "Directory %" SIZE_T_FORMAT "u: %s\n",
1448 i, name);
1449 if (d->d_type < __arraycount(types))
1450 (void)fprintf(stderr, "Type: %s\n", types[d->d_type]);
1451 else
1452 (void)fprintf(stderr, "Type: %d\n", d->d_type);
1453 (void)fprintf(stderr, "Color: %s\n",
1454 d->d_color ? "black" : "red");
1455 (void)fprintf(stderr, "Left child: %d\n", d->d_left_child);
1456 (void)fprintf(stderr, "Right child: %d\n", d->d_right_child);
1457 (void)fprintf(stderr, "Flags: %#x\n", d->d_flags);
1458 cdf_timestamp_to_timespec(&ts, d->d_created);
1459 (void)fprintf(stderr, "Created %s", cdf_ctime(&ts.tv_sec, buf));
1460 cdf_timestamp_to_timespec(&ts, d->d_modified);
1461 (void)fprintf(stderr, "Modified %s",
1462 cdf_ctime(&ts.tv_sec, buf));
1463 (void)fprintf(stderr, "Stream %d\n", d->d_stream_first_sector);
1464 (void)fprintf(stderr, "Size %d\n", d->d_size);
1465 switch (d->d_type) {
1466 case CDF_DIR_TYPE_USER_STORAGE:
1467 (void)fprintf(stderr, "Storage: %d\n", d->d_storage);
1468 break;
1469 case CDF_DIR_TYPE_USER_STREAM:
1470 if (sst == NULL)
1471 break;
1472 if (cdf_read_sector_chain(info, h, sat, ssat, sst,
1473 d->d_stream_first_sector, d->d_size, &scn) == -1) {
1474 warn("Can't read stream for %s at %d len %d",
1475 name, d->d_stream_first_sector, d->d_size);
1476 break;
1477 }
1478 cdf_dump_stream(&scn);
1479 free(scn.sst_tab);
1480 break;
1481 default:
1482 break;
1483 }
1484
1485 }
1486 }
1487
1488 void
cdf_dump_property_info(const cdf_property_info_t * info,size_t count)1489 cdf_dump_property_info(const cdf_property_info_t *info, size_t count)
1490 {
1491 cdf_timestamp_t tp;
1492 struct timespec ts;
1493 char buf[64];
1494 size_t i, j;
1495
1496 for (i = 0; i < count; i++) {
1497 cdf_print_property_name(buf, sizeof(buf), info[i].pi_id);
1498 (void)fprintf(stderr, "%" SIZE_T_FORMAT "u) %s: ", i, buf);
1499 switch (info[i].pi_type) {
1500 case CDF_NULL:
1501 break;
1502 case CDF_SIGNED16:
1503 (void)fprintf(stderr, "signed 16 [%hd]\n",
1504 info[i].pi_s16);
1505 break;
1506 case CDF_SIGNED32:
1507 (void)fprintf(stderr, "signed 32 [%d]\n",
1508 info[i].pi_s32);
1509 break;
1510 case CDF_UNSIGNED32:
1511 (void)fprintf(stderr, "unsigned 32 [%u]\n",
1512 info[i].pi_u32);
1513 break;
1514 case CDF_FLOAT:
1515 (void)fprintf(stderr, "float [%g]\n",
1516 info[i].pi_f);
1517 break;
1518 case CDF_DOUBLE:
1519 (void)fprintf(stderr, "double [%g]\n",
1520 info[i].pi_d);
1521 break;
1522 case CDF_LENGTH32_STRING:
1523 (void)fprintf(stderr, "string %u [%.*s]\n",
1524 info[i].pi_str.s_len,
1525 info[i].pi_str.s_len, info[i].pi_str.s_buf);
1526 break;
1527 case CDF_LENGTH32_WSTRING:
1528 (void)fprintf(stderr, "string %u [",
1529 info[i].pi_str.s_len);
1530 for (j = 0; j < info[i].pi_str.s_len - 1; j++)
1531 (void)fputc(info[i].pi_str.s_buf[j << 1], stderr);
1532 (void)fprintf(stderr, "]\n");
1533 break;
1534 case CDF_FILETIME:
1535 tp = info[i].pi_tp;
1536 if (tp < 1000000000000000LL) {
1537 cdf_print_elapsed_time(buf, sizeof(buf), tp);
1538 (void)fprintf(stderr, "timestamp %s\n", buf);
1539 } else {
1540 char tbuf[26];
1541 cdf_timestamp_to_timespec(&ts, tp);
1542 (void)fprintf(stderr, "timestamp %s",
1543 cdf_ctime(&ts.tv_sec, tbuf));
1544 }
1545 break;
1546 case CDF_CLIPBOARD:
1547 (void)fprintf(stderr, "CLIPBOARD %u\n", info[i].pi_u32);
1548 break;
1549 default:
1550 DPRINTF(("Don't know how to deal with %#x\n",
1551 info[i].pi_type));
1552 break;
1553 }
1554 }
1555 }
1556
1557
1558 void
cdf_dump_summary_info(const cdf_header_t * h,const cdf_stream_t * sst)1559 cdf_dump_summary_info(const cdf_header_t *h, const cdf_stream_t *sst)
1560 {
1561 char buf[128];
1562 cdf_summary_info_header_t ssi;
1563 cdf_property_info_t *info;
1564 size_t count;
1565
1566 (void)&h;
1567 if (cdf_unpack_summary_info(sst, h, &ssi, &info, &count) == -1)
1568 return;
1569 (void)fprintf(stderr, "Endian: %#x\n", ssi.si_byte_order);
1570 (void)fprintf(stderr, "Os Version %d.%d\n", ssi.si_os_version & 0xff,
1571 ssi.si_os_version >> 8);
1572 (void)fprintf(stderr, "Os %d\n", ssi.si_os);
1573 cdf_print_classid(buf, sizeof(buf), &ssi.si_class);
1574 (void)fprintf(stderr, "Class %s\n", buf);
1575 (void)fprintf(stderr, "Count %d\n", ssi.si_count);
1576 cdf_dump_property_info(info, count);
1577 free(info);
1578 }
1579
1580
1581 void
cdf_dump_catalog(const cdf_header_t * h,const cdf_stream_t * sst)1582 cdf_dump_catalog(const cdf_header_t *h, const cdf_stream_t *sst)
1583 {
1584 cdf_catalog_t *cat;
1585 cdf_unpack_catalog(h, sst, &cat);
1586 const cdf_catalog_entry_t *ce = cat->cat_e;
1587 struct timespec ts;
1588 char tbuf[64], sbuf[256];
1589 size_t i;
1590
1591 printf("Catalog:\n");
1592 for (i = 0; i < cat->cat_num; i++) {
1593 cdf_timestamp_to_timespec(&ts, ce[i].ce_timestamp);
1594 printf("\t%d %s %s", ce[i].ce_num,
1595 cdf_u16tos8(sbuf, ce[i].ce_namlen, ce[i].ce_name),
1596 cdf_ctime(&ts.tv_sec, tbuf));
1597 }
1598 free(cat);
1599 }
1600
1601 #endif
1602
1603 #ifdef TEST
1604 int
main(int argc,char * argv[])1605 main(int argc, char *argv[])
1606 {
1607 int i;
1608 cdf_header_t h;
1609 cdf_sat_t sat, ssat;
1610 cdf_stream_t sst, scn;
1611 cdf_dir_t dir;
1612 cdf_info_t info;
1613 const cdf_directory_t *root;
1614 #ifdef __linux__
1615 #define getprogname() __progname
1616 extern char *__progname;
1617 #endif
1618 if (argc < 2) {
1619 (void)fprintf(stderr, "Usage: %s <filename>\n", getprogname());
1620 return -1;
1621 }
1622
1623 info.i_buf = NULL;
1624 info.i_len = 0;
1625 for (i = 1; i < argc; i++) {
1626 if ((info.i_fd = open(argv[1], O_RDONLY)) == -1)
1627 err(EXIT_FAILURE, "Cannot open `%s'", argv[1]);
1628
1629 if (cdf_read_header(&info, &h) == -1)
1630 err(EXIT_FAILURE, "Cannot read header");
1631 #ifdef CDF_DEBUG
1632 cdf_dump_header(&h);
1633 #endif
1634
1635 if (cdf_read_sat(&info, &h, &sat) == -1)
1636 err(EXIT_FAILURE, "Cannot read sat");
1637 #ifdef CDF_DEBUG
1638 cdf_dump_sat("SAT", &sat, CDF_SEC_SIZE(&h));
1639 #endif
1640
1641 if (cdf_read_ssat(&info, &h, &sat, &ssat) == -1)
1642 err(EXIT_FAILURE, "Cannot read ssat");
1643 #ifdef CDF_DEBUG
1644 cdf_dump_sat("SSAT", &ssat, CDF_SHORT_SEC_SIZE(&h));
1645 #endif
1646
1647 if (cdf_read_dir(&info, &h, &sat, &dir) == -1)
1648 err(EXIT_FAILURE, "Cannot read dir");
1649
1650 if (cdf_read_short_stream(&info, &h, &sat, &dir, &sst, &root)
1651 == -1)
1652 err(EXIT_FAILURE, "Cannot read short stream");
1653 #ifdef CDF_DEBUG
1654 cdf_dump_stream(&sst);
1655 #endif
1656
1657 #ifdef CDF_DEBUG
1658 cdf_dump_dir(&info, &h, &sat, &ssat, &sst, &dir);
1659 #endif
1660
1661
1662 if (cdf_read_summary_info(&info, &h, &sat, &ssat, &sst, &dir,
1663 &scn) == -1)
1664 warn("Cannot read summary info");
1665 #ifdef CDF_DEBUG
1666 else
1667 cdf_dump_summary_info(&h, &scn);
1668 #endif
1669 if (cdf_read_user_stream(&info, &h, &sat, &ssat, &sst,
1670 &dir, "Catalog", &scn) == -1)
1671 warn("Cannot read catalog");
1672 #ifdef CDF_DEBUG
1673 else
1674 cdf_dump_catalog(&h, &scn);
1675 #endif
1676
1677 (void)close(info.i_fd);
1678 }
1679
1680 return 0;
1681 }
1682 #endif
1683