readcdf.c 11 KB

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  1. /*-
  2. * Copyright (c) 2008 Christos Zoulas
  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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  15. * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  16. * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17. * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  18. * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  19. * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  20. * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  21. * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  22. * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  23. * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  24. * POSSIBILITY OF SUCH DAMAGE.
  25. */
  26. #include "file.h"
  27. #ifndef lint
  28. FILE_RCSID("@(#)$File: readcdf.c,v 1.27 2011/09/28 13:30:10 christos Exp $")
  29. #endif
  30. #include <stdlib.h>
  31. #include <unistd.h>
  32. #include <string.h>
  33. #include <time.h>
  34. #include <ctype.h>
  35. #include "cdf.h"
  36. #include "magic.h"
  37. #define NOTMIME(ms) (((ms)->flags & MAGIC_MIME) == 0)
  38. private int
  39. cdf_file_property_info(struct magic_set *ms, const cdf_property_info_t *info,
  40. size_t count)
  41. {
  42. size_t i;
  43. cdf_timestamp_t tp;
  44. struct timespec ts;
  45. char buf[64];
  46. const char *str = NULL;
  47. const char *s;
  48. int len;
  49. for (i = 0; i < count; i++) {
  50. cdf_print_property_name(buf, sizeof(buf), info[i].pi_id);
  51. switch (info[i].pi_type) {
  52. case CDF_NULL:
  53. break;
  54. case CDF_SIGNED16:
  55. if (NOTMIME(ms) && file_printf(ms, ", %s: %hd", buf,
  56. info[i].pi_s16) == -1)
  57. return -1;
  58. break;
  59. case CDF_SIGNED32:
  60. if (NOTMIME(ms) && file_printf(ms, ", %s: %d", buf,
  61. info[i].pi_s32) == -1)
  62. return -1;
  63. break;
  64. case CDF_UNSIGNED32:
  65. if (NOTMIME(ms) && file_printf(ms, ", %s: %u", buf,
  66. info[i].pi_u32) == -1)
  67. return -1;
  68. break;
  69. case CDF_LENGTH32_STRING:
  70. case CDF_LENGTH32_WSTRING:
  71. len = info[i].pi_str.s_len;
  72. if (len > 1) {
  73. char vbuf[1024];
  74. size_t j, k = 1;
  75. if (info[i].pi_type == CDF_LENGTH32_WSTRING)
  76. k++;
  77. s = info[i].pi_str.s_buf;
  78. for (j = 0; j < sizeof(vbuf) && len--;
  79. j++, s += k) {
  80. if (*s == '\0')
  81. break;
  82. if (isprint((unsigned char)*s))
  83. vbuf[j] = *s;
  84. }
  85. if (j == sizeof(vbuf))
  86. --j;
  87. vbuf[j] = '\0';
  88. if (NOTMIME(ms)) {
  89. if (vbuf[0]) {
  90. if (file_printf(ms, ", %s: %s",
  91. buf, vbuf) == -1)
  92. return -1;
  93. }
  94. } else if (info[i].pi_id ==
  95. CDF_PROPERTY_NAME_OF_APPLICATION) {
  96. if (strstr(vbuf, "Word"))
  97. str = "msword";
  98. else if (strstr(vbuf, "Excel"))
  99. str = "vnd.ms-excel";
  100. else if (strstr(vbuf, "Powerpoint"))
  101. str = "vnd.ms-powerpoint";
  102. else if (strstr(vbuf,
  103. "Crystal Reports"))
  104. str = "x-rpt";
  105. }
  106. }
  107. break;
  108. case CDF_FILETIME:
  109. tp = info[i].pi_tp;
  110. if (tp != 0) {
  111. if (tp < 1000000000000000LL) {
  112. char tbuf[64];
  113. cdf_print_elapsed_time(tbuf,
  114. sizeof(tbuf), tp);
  115. if (NOTMIME(ms) && file_printf(ms,
  116. ", %s: %s", buf, tbuf) == -1)
  117. return -1;
  118. } else {
  119. char *c, *ec;
  120. cdf_timestamp_to_timespec(&ts, tp);
  121. c = cdf_ctime(&ts.tv_sec);
  122. if ((ec = strchr(c, '\n')) != NULL)
  123. *ec = '\0';
  124. if (NOTMIME(ms) && file_printf(ms,
  125. ", %s: %s", buf, c) == -1)
  126. return -1;
  127. }
  128. }
  129. break;
  130. case CDF_CLIPBOARD:
  131. break;
  132. default:
  133. return -1;
  134. }
  135. }
  136. if (!NOTMIME(ms)) {
  137. if (str == NULL)
  138. return 0;
  139. if (file_printf(ms, "application/%s", str) == -1)
  140. return -1;
  141. }
  142. return 1;
  143. }
  144. private int
  145. cdf_file_summary_info(struct magic_set *ms, const cdf_header_t *h,
  146. const cdf_stream_t *sst)
  147. {
  148. cdf_summary_info_header_t si;
  149. cdf_property_info_t *info;
  150. size_t count;
  151. int m;
  152. if (cdf_unpack_summary_info(sst, h, &si, &info, &count) == -1)
  153. return -1;
  154. if (NOTMIME(ms)) {
  155. if (file_printf(ms, "Composite Document File V2 Document") == -1)
  156. return -1;
  157. if (file_printf(ms, ", %s Endian",
  158. si.si_byte_order == 0xfffe ? "Little" : "Big") == -1)
  159. return -1;
  160. switch (si.si_os) {
  161. case 2:
  162. if (file_printf(ms, ", Os: Windows, Version %d.%d",
  163. si.si_os_version & 0xff,
  164. (uint32_t)si.si_os_version >> 8) == -1)
  165. return -1;
  166. break;
  167. case 1:
  168. if (file_printf(ms, ", Os: MacOS, Version %d.%d",
  169. (uint32_t)si.si_os_version >> 8,
  170. si.si_os_version & 0xff) == -1)
  171. return -1;
  172. break;
  173. default:
  174. if (file_printf(ms, ", Os %d, Version: %d.%d", si.si_os,
  175. si.si_os_version & 0xff,
  176. (uint32_t)si.si_os_version >> 8) == -1)
  177. return -1;
  178. break;
  179. }
  180. }
  181. m = cdf_file_property_info(ms, info, count);
  182. free(info);
  183. return m;
  184. }
  185. protected int
  186. file_trycdf(struct magic_set *ms, int fd, const unsigned char *buf,
  187. size_t nbytes)
  188. {
  189. cdf_info_t info;
  190. cdf_header_t h;
  191. cdf_sat_t sat, ssat;
  192. cdf_stream_t sst, scn;
  193. cdf_dir_t dir;
  194. int i;
  195. const char *expn = "";
  196. const char *corrupt = "corrupt: ";
  197. info.i_fd = fd;
  198. info.i_buf = buf;
  199. info.i_len = nbytes;
  200. if (ms->flags & MAGIC_APPLE)
  201. return 0;
  202. if (cdf_read_header(&info, &h) == -1)
  203. return 0;
  204. #ifdef CDF_DEBUG
  205. cdf_dump_header(&h);
  206. #endif
  207. if ((i = cdf_read_sat(&info, &h, &sat)) == -1) {
  208. expn = "Can't read SAT";
  209. goto out0;
  210. }
  211. #ifdef CDF_DEBUG
  212. cdf_dump_sat("SAT", &sat, CDF_SEC_SIZE(&h));
  213. #endif
  214. if ((i = cdf_read_ssat(&info, &h, &sat, &ssat)) == -1) {
  215. expn = "Can't read SSAT";
  216. goto out1;
  217. }
  218. #ifdef CDF_DEBUG
  219. cdf_dump_sat("SSAT", &ssat, CDF_SHORT_SEC_SIZE(&h));
  220. #endif
  221. if ((i = cdf_read_dir(&info, &h, &sat, &dir)) == -1) {
  222. expn = "Can't read directory";
  223. goto out2;
  224. }
  225. if ((i = cdf_read_short_stream(&info, &h, &sat, &dir, &sst)) == -1) {
  226. expn = "Cannot read short stream";
  227. goto out3;
  228. }
  229. #ifdef CDF_DEBUG
  230. cdf_dump_dir(&info, &h, &sat, &ssat, &sst, &dir);
  231. #endif
  232. if ((i = cdf_read_summary_info(&info, &h, &sat, &ssat, &sst, &dir,
  233. &scn)) == -1) {
  234. if (errno == ESRCH) {
  235. corrupt = expn;
  236. expn = "No summary info";
  237. } else {
  238. expn = "Cannot read summary info";
  239. }
  240. goto out4;
  241. }
  242. #ifdef CDF_DEBUG
  243. cdf_dump_summary_info(&h, &scn);
  244. #endif
  245. if ((i = cdf_file_summary_info(ms, &h, &scn)) == -1)
  246. expn = "Can't expand summary_info";
  247. if (i == 0) {
  248. const char *str = "vnd.ms-office";
  249. cdf_directory_t *d;
  250. char name[__arraycount(d->d_name)];
  251. size_t j, k;
  252. for (j = 0; j < dir.dir_len; j++) {
  253. d = &dir.dir_tab[j];
  254. for (k = 0; k < sizeof(name); k++)
  255. name[k] = (char)cdf_tole2(d->d_name[k]);
  256. if (strstr(name, "WordDocument") == 0) {
  257. str = "msword";
  258. break;
  259. }
  260. }
  261. if (file_printf(ms, "application/%s", str) == -1)
  262. return -1;
  263. i = 1;
  264. }
  265. free(scn.sst_tab);
  266. out4:
  267. free(sst.sst_tab);
  268. out3:
  269. free(dir.dir_tab);
  270. out2:
  271. free(ssat.sat_tab);
  272. out1:
  273. free(sat.sat_tab);
  274. out0:
  275. if (i != 1) {
  276. if (file_printf(ms, "Composite Document File V2 Document")
  277. == -1)
  278. return -1;
  279. if (*expn)
  280. if (file_printf(ms, ", %s%s", corrupt, expn) == -1)
  281. return -1;
  282. i = 1;
  283. }
  284. return i;
  285. }