readcdf.c 6.6 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 1.15 2009/04/30 21:03:26 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 = "vnd.ms-office";
  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_SIGNED16:
  53. if (NOTMIME(ms) && file_printf(ms, ", %s: %hd", buf,
  54. info[i].pi_s16) == -1)
  55. return -1;
  56. break;
  57. case CDF_SIGNED32:
  58. if (NOTMIME(ms) && file_printf(ms, ", %s: %d", buf,
  59. info[i].pi_s32) == -1)
  60. return -1;
  61. break;
  62. case CDF_UNSIGNED32:
  63. if (NOTMIME(ms) && file_printf(ms, ", %s: %u", buf,
  64. info[i].pi_u32) == -1)
  65. return -1;
  66. break;
  67. case CDF_LENGTH32_STRING:
  68. len = info[i].pi_str.s_len;
  69. if (len > 1) {
  70. s = info[i].pi_str.s_buf;
  71. if (NOTMIME(ms)) {
  72. char vbuf[1024];
  73. size_t j;
  74. for (j = 0; j < sizeof(vbuf) && len--;
  75. j++, s++) {
  76. if (*s == '\0')
  77. break;
  78. if (isprint((unsigned char)*s))
  79. vbuf[j] = *s;
  80. }
  81. if (j == sizeof(vbuf))
  82. --j;
  83. vbuf[j] = '\0';
  84. if (vbuf[0]) {
  85. if (file_printf(ms, ", %s: %s",
  86. buf, vbuf) == -1)
  87. return -1;
  88. }
  89. } else if (info[i].pi_id ==
  90. CDF_PROPERTY_NAME_OF_APPLICATION) {
  91. if (strstr(s, "Word"))
  92. str = "msword";
  93. else if (strstr(s, "Excel"))
  94. str = "vnd.ms-excel";
  95. else if (strstr(s, "Powerpoint"))
  96. str = "vnd.ms-powerpoint";
  97. }
  98. }
  99. break;
  100. case CDF_FILETIME:
  101. tp = info[i].pi_tp;
  102. if (tp != 0) {
  103. if (tp < 1000000000000000LL) {
  104. char tbuf[64];
  105. cdf_print_elapsed_time(tbuf,
  106. sizeof(tbuf), tp);
  107. if (NOTMIME(ms) && file_printf(ms,
  108. ", %s: %s", buf, tbuf) == -1)
  109. return -1;
  110. } else {
  111. char *c, *ec;
  112. cdf_timestamp_to_timespec(&ts, tp);
  113. c = ctime(&ts.tv_sec);
  114. if ((ec = strchr(c, '\n')) != NULL)
  115. *ec = '\0';
  116. if (NOTMIME(ms) && file_printf(ms,
  117. ", %s: %s", buf, c) == -1)
  118. return -1;
  119. }
  120. }
  121. break;
  122. case CDF_CLIPBOARD:
  123. break;
  124. default:
  125. return -1;
  126. }
  127. }
  128. if (!NOTMIME(ms)) {
  129. if (file_printf(ms, "application/%s", str) == -1)
  130. return -1;
  131. }
  132. return 1;
  133. }
  134. private int
  135. cdf_file_summary_info(struct magic_set *ms, const cdf_stream_t *sst)
  136. {
  137. cdf_summary_info_header_t si;
  138. cdf_property_info_t *info;
  139. size_t count;
  140. int m;
  141. if (cdf_unpack_summary_info(sst, &si, &info, &count) == -1) {
  142. if (si.si_byte_order != 0xfffe)
  143. return 0;
  144. else
  145. return -1;
  146. }
  147. if (si.si_byte_order != 0xfffe)
  148. return 0;
  149. if (NOTMIME(ms)) {
  150. if (file_printf(ms, "CDF V2 Document") == -1)
  151. return -1;
  152. if (file_printf(ms, ", %s Endian",
  153. si.si_byte_order == 0xfffe ? "Little" : "Big") == -1)
  154. return -1;
  155. switch (si.si_os) {
  156. case 2:
  157. if (file_printf(ms, ", Os: Windows, Version %d.%d",
  158. si.si_os_version & 0xff, si.si_os_version >> 8)
  159. == -1)
  160. return -1;
  161. break;
  162. case 1:
  163. if (file_printf(ms, ", Os: MacOS, Version %d.%d",
  164. si.si_os_version >> 8, si.si_os_version & 0xff)
  165. == -1)
  166. return -1;
  167. break;
  168. default:
  169. if (file_printf(ms, ", Os %d, Version: %d.%d", si.si_os,
  170. si.si_os_version & 0xff, si.si_os_version >> 8)
  171. == -1)
  172. return -1;
  173. break;
  174. }
  175. }
  176. m = cdf_file_property_info(ms, info, count);
  177. free(info);
  178. return m;
  179. }
  180. protected int
  181. file_trycdf(struct magic_set *ms, int fd, const unsigned char *buf,
  182. size_t nbytes)
  183. {
  184. cdf_info_t info;
  185. cdf_header_t h;
  186. cdf_sat_t sat, ssat;
  187. cdf_stream_t sst, scn;
  188. cdf_dir_t dir;
  189. int i;
  190. const char *expn = "";
  191. info.i_fd = fd;
  192. info.i_buf = buf;
  193. info.i_len = nbytes;
  194. if (ms->flags & MAGIC_APPLE)
  195. return 0;
  196. if (cdf_read_header(&info, &h) == -1)
  197. return 0;
  198. #ifdef CDF_DEBUG
  199. cdf_dump_header(&h);
  200. #endif
  201. if (cdf_read_sat(&info, &h, &sat) == -1) {
  202. expn = "Can't read SAT";
  203. return -1;
  204. }
  205. #ifdef CDF_DEBUG
  206. cdf_dump_sat("SAT", &sat, CDF_SEC_SIZE(&h));
  207. #endif
  208. if ((i = cdf_read_ssat(&info, &h, &sat, &ssat)) == -1) {
  209. expn = "Can't read SSAT";
  210. goto out1;
  211. }
  212. #ifdef CDF_DEBUG
  213. cdf_dump_sat("SSAT", &ssat, CDF_SHORT_SEC_SIZE(&h));
  214. #endif
  215. if ((i = cdf_read_dir(&info, &h, &sat, &dir)) == -1) {
  216. expn = "Can't read directory";
  217. goto out2;
  218. }
  219. if ((i = cdf_read_short_stream(&info, &h, &sat, &dir, &sst)) == -1) {
  220. expn = "Cannot read short stream";
  221. goto out3;
  222. }
  223. #ifdef CDF_DEBUG
  224. cdf_dump_dir(&info, &h, &sat, &ssat, &sst, &dir);
  225. #endif
  226. if ((i = cdf_read_summary_info(&info, &h, &sat, &ssat, &sst, &dir,
  227. &scn)) == -1) {
  228. expn = "";
  229. goto out4;
  230. }
  231. #ifdef CDF_DEBUG
  232. cdf_dump_summary_info(&h, &scn);
  233. #endif
  234. if ((i = cdf_file_summary_info(ms, &scn)) == -1)
  235. expn = "Can't expand summary_info";
  236. free(scn.sst_tab);
  237. out4:
  238. free(sst.sst_tab);
  239. out3:
  240. free(dir.dir_tab);
  241. out2:
  242. free(ssat.sat_tab);
  243. out1:
  244. free(sat.sat_tab);
  245. if (i != 1) {
  246. if (file_printf(ms, "CDF V2 Document") == -1)
  247. return -1;
  248. if (*expn)
  249. if (file_printf(ms, ", corrupt: %s", expn) == -1)
  250. return -1;
  251. i = 1;
  252. }
  253. return i;
  254. }