contrib/file/src/readcdf.c

   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
  28 #ifndef lint
  29 FILE_RCSID("@(#)$File: readcdf.c,v 1.25 2011/02/10 21:35:05 christos Exp $")
  30 #endif
  31
  32 #include <stdlib.h>
  33 #include <unistd.h>
  34 #include <string.h>
  35 #include <time.h>
  36 #include <ctype.h>
  37
  38 #include "cdf.h"
  39 #include "magic.h"
  40
  41 #define NOTMIME(ms) (((ms)->flags & MAGIC_MIME) == 0)
  42
  43 private int
  44 cdf_file_property_info(struct magic_set *ms, const cdf_property_info_t *info,
  45     size_t count)
  46 {
  47         size_t i;
  48         cdf_timestamp_t tp;
  49         struct timespec ts;
  50         char buf[64];
  51         const char *str = "vnd.ms-office";
  52         const char *s;
  53         int len;
  54
  55         for (i = 0; i < count; i++) {
  56                 cdf_print_property_name(buf, sizeof(buf), info[i].pi_id);
  57                 switch (info[i].pi_type) {
  58                 case CDF_NULL:
  59                         break;
  60                 case CDF_SIGNED16:
  61                         if (NOTMIME(ms) && file_printf(ms, ", %s: %hd", buf,
  62                             info[i].pi_s16) == -1)
  63                                 return -1;
  64                         break;
  65                 case CDF_SIGNED32:
  66                         if (NOTMIME(ms) && file_printf(ms, ", %s: %d", buf,
  67                             info[i].pi_s32) == -1)
  68                                 return -1;
  69                         break;
  70                 case CDF_UNSIGNED32:
  71                         if (NOTMIME(ms) && file_printf(ms, ", %s: %u", buf,
  72                             info[i].pi_u32) == -1)
  73                                 return -1;
  74                         break;
  75                 case CDF_LENGTH32_STRING:
  76                 case CDF_LENGTH32_WSTRING:
  77                         len = info[i].pi_str.s_len;
  78                         if (len > 1) {
  79                                 char vbuf[1024];
  80                                 size_t j, k = 1;
  81
  82                                 if (info[i].pi_type == CDF_LENGTH32_WSTRING)
  83                                     k++;
  84                                 s = info[i].pi_str.s_buf;
  85                                 for (j = 0; j < sizeof(vbuf) && len--;
  86                                     j++, s += k) {
  87                                         if (*s == '\0')
  88                                                 break;
  89                                         if (isprint((unsigned char)*s))
  90                                                 vbuf[j] = *s;
  91                                 }
  92                                 if (j == sizeof(vbuf))
  93                                         --j;
  94                                 vbuf[j] = '\0';
  95                                 if (NOTMIME(ms)) {
  96                                         if (vbuf[0]) {
  97                                                 if (file_printf(ms, ", %s: %s",
  98                                                     buf, vbuf) == -1)
  99                                                         return -1;
 100                                         }
 101                                 } else if (info[i].pi_id ==
 102                                         CDF_PROPERTY_NAME_OF_APPLICATION) {
 103                                         if (strstr(vbuf, "Word"))
 104                                                 str = "msword";
 105                                         else if (strstr(vbuf, "Excel"))
 106                                                 str = "vnd.ms-excel";
 107                                         else if (strstr(vbuf, "Powerpoint"))
 108                                                 str = "vnd.ms-powerpoint";
 109                                         else if (strstr(vbuf,
 110                                             "Crystal Reports"))
 111                                                 str = "x-rpt";
 112                                 }
 113                         }
 114                         break;
 115                 case CDF_FILETIME:
 116                         tp = info[i].pi_tp;
 117                         if (tp != 0) {
 118                                 if (tp < 1000000000000000LL) {
 119                                         char tbuf[64];
 120                                         cdf_print_elapsed_time(tbuf,
 121                                             sizeof(tbuf), tp);
 122                                         if (NOTMIME(ms) && file_printf(ms,
 123                                             ", %s: %s", buf, tbuf) == -1)
 124                                                 return -1;
 125                                 } else {
 126                                         char *c, *ec;
 127                                         cdf_timestamp_to_timespec(&ts, tp);
 128                                         c = cdf_ctime(&ts.tv_sec);
 129                                         if ((ec = strchr(c, '\n')) != NULL)
 130                                                 *ec = '\0';
 131
 132                                         if (NOTMIME(ms) && file_printf(ms,
 133                                             ", %s: %s", buf, c) == -1)
 134                                                 return -1;
 135                                 }
 136                         }
 137                         break;
 138                 case CDF_CLIPBOARD:
 139                         break;
 140                 default:
 141                         return -1;
 142                 }
 143         }
 144         if (!NOTMIME(ms)) {
 145                 if (file_printf(ms, "application/%s", str) == -1)
 146                         return -1;
 147         }
 148         return 1;
 149 }
 150
 151 private int
 152 cdf_file_summary_info(struct magic_set *ms, const cdf_header_t *h,
 153     const cdf_stream_t *sst)
 154 {
 155         cdf_summary_info_header_t si;
 156         cdf_property_info_t *info;
 157         size_t count;
 158         int m;
 159
 160         if (cdf_unpack_summary_info(sst, h, &si, &info, &count) == -1)
 161                 return -1;
 162
 163         if (NOTMIME(ms)) {
 164                 if (file_printf(ms, "Composite Document File V2 Document") == -1)
 165                         return -1;
 166
 167                 if (file_printf(ms, ", %s Endian",
 168                     si.si_byte_order == 0xfffe ?  "Little" : "Big") == -1)
 169                         return -1;
 170                 switch (si.si_os) {
 171                 case 2:
 172                         if (file_printf(ms, ", Os: Windows, Version %d.%d",
 173                             si.si_os_version & 0xff,
 174                             (uint32_t)si.si_os_version >> 8) == -1)
 175                                 return -1;
 176                         break;
 177                 case 1:
 178                         if (file_printf(ms, ", Os: MacOS, Version %d.%d",
 179                             (uint32_t)si.si_os_version >> 8,
 180                             si.si_os_version & 0xff) == -1)
 181                                 return -1;
 182                         break;
 183                 default:
 184                         if (file_printf(ms, ", Os %d, Version: %d.%d", si.si_os,
 185                             si.si_os_version & 0xff,
 186                             (uint32_t)si.si_os_version >> 8) == -1)
 187                                 return -1;
 188                         break;
 189                 }
 190         }
 191
 192         m = cdf_file_property_info(ms, info, count);
 193         free(info);
 194
 195         return m;
 196 }
 197
 198 protected int
 199 file_trycdf(struct magic_set *ms, int fd, const unsigned char *buf,
 200     size_t nbytes)
 201 {
 202         cdf_info_t info;
 203         cdf_header_t h;
 204         cdf_sat_t sat, ssat;
 205         cdf_stream_t sst, scn;
 206         cdf_dir_t dir;
 207         int i;
 208         const char *expn = "";
 209         const char *corrupt = "corrupt: ";
 210
 211         info.i_fd = fd;
 212         info.i_buf = buf;
 213         info.i_len = nbytes;
 214         if (ms->flags & MAGIC_APPLE)
 215                 return 0;
 216         if (cdf_read_header(&info, &h) == -1)
 217                 return 0;
 218 #ifdef CDF_DEBUG
 219         cdf_dump_header(&h);
 220 #endif
 221
 222         if ((i = cdf_read_sat(&info, &h, &sat)) == -1) {
 223                 expn = "Can't read SAT";
 224                 goto out0;
 225         }
 226 #ifdef CDF_DEBUG
 227         cdf_dump_sat("SAT", &sat, CDF_SEC_SIZE(&h));
 228 #endif
 229
 230         if ((i = cdf_read_ssat(&info, &h, &sat, &ssat)) == -1) {
 231                 expn = "Can't read SSAT";
 232                 goto out1;
 233         }
 234 #ifdef CDF_DEBUG
 235         cdf_dump_sat("SSAT", &ssat, CDF_SHORT_SEC_SIZE(&h));
 236 #endif
 237
 238         if ((i = cdf_read_dir(&info, &h, &sat, &dir)) == -1) {
 239                 expn = "Can't read directory";
 240                 goto out2;
 241         }
 242
 243         if ((i = cdf_read_short_stream(&info, &h, &sat, &dir, &sst)) == -1) {
 244                 expn = "Cannot read short stream";
 245                 goto out3;
 246         }
 247 #ifdef CDF_DEBUG
 248         cdf_dump_dir(&info, &h, &sat, &ssat, &sst, &dir);
 249 #endif
 250
 251         if ((i = cdf_read_summary_info(&info, &h, &sat, &ssat, &sst, &dir,
 252             &scn)) == -1) {
 253                 if (errno == ESRCH) {
 254                         corrupt = expn;
 255                         expn = "No summary info";
 256                 } else {
 257                         expn = "Cannot read summary info";
 258                 }
 259                 goto out4;
 260         }
 261 #ifdef CDF_DEBUG
 262         cdf_dump_summary_info(&h, &scn);
 263 #endif
 264         if ((i = cdf_file_summary_info(ms, &h, &scn)) == -1)
 265                 expn = "Can't expand summary_info";
 266         free(scn.sst_tab);
 267 out4:
 268         free(sst.sst_tab);
 269 out3:
 270         free(dir.dir_tab);
 271 out2:
 272         free(ssat.sat_tab);
 273 out1:
 274         free(sat.sat_tab);
 275 out0:
 276         if (i != 1) {
 277                 if (file_printf(ms, "Composite Document File V2 Document") == -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 }