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 1.22 2010/01/20 01:36:55 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 = 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_stream_t *sst) 153 { 154 cdf_summary_info_header_t si; 155 cdf_property_info_t *info; 156 size_t count; 157 int m; 158 159 if (cdf_unpack_summary_info(sst, &si, &info, &count) == -1) 160 return -1; 161 162 if (NOTMIME(ms)) { 163 if (file_printf(ms, "CDF V2 Document") == -1) 164 return -1; 165 166 if (file_printf(ms, ", %s Endian", 167 si.si_byte_order == 0xfffe ? "Little" : "Big") == -1) 168 return -1; 169 switch (si.si_os) { 170 case 2: 171 if (file_printf(ms, ", Os: Windows, Version %d.%d", 172 si.si_os_version & 0xff, 173 (uint32_t)si.si_os_version >> 8) == -1) 174 return -1; 175 break; 176 case 1: 177 if (file_printf(ms, ", Os: MacOS, Version %d.%d", 178 (uint32_t)si.si_os_version >> 8, 179 si.si_os_version & 0xff) == -1) 180 return -1; 181 break; 182 default: 183 if (file_printf(ms, ", Os %d, Version: %d.%d", si.si_os, 184 si.si_os_version & 0xff, 185 (uint32_t)si.si_os_version >> 8) == -1) 186 return -1; 187 break; 188 } 189 } 190 191 m = cdf_file_property_info(ms, info, count); 192 free(info); 193 194 return m; 195 } 196 197 protected int 198 file_trycdf(struct magic_set *ms, int fd, const unsigned char *buf, 199 size_t nbytes) 200 { 201 cdf_info_t info; 202 cdf_header_t h; 203 cdf_sat_t sat, ssat; 204 cdf_stream_t sst, scn; 205 cdf_dir_t dir; 206 int i; 207 const char *expn = ""; 208 const char *corrupt = "corrupt: "; 209 210 info.i_fd = fd; 211 info.i_buf = buf; 212 info.i_len = nbytes; 213 if (ms->flags & MAGIC_APPLE) 214 return 0; 215 if (cdf_read_header(&info, &h) == -1) 216 return 0; 217 #ifdef CDF_DEBUG 218 cdf_dump_header(&h); 219 #endif 220 221 if ((i = cdf_read_sat(&info, &h, &sat)) == -1) { 222 expn = "Can't read SAT"; 223 goto out0; 224 } 225 #ifdef CDF_DEBUG 226 cdf_dump_sat("SAT", &sat, CDF_SEC_SIZE(&h)); 227 #endif 228 229 if ((i = cdf_read_ssat(&info, &h, &sat, &ssat)) == -1) { 230 expn = "Can't read SSAT"; 231 goto out1; 232 } 233 #ifdef CDF_DEBUG 234 cdf_dump_sat("SSAT", &ssat, CDF_SHORT_SEC_SIZE(&h)); 235 #endif 236 237 if ((i = cdf_read_dir(&info, &h, &sat, &dir)) == -1) { 238 expn = "Can't read directory"; 239 goto out2; 240 } 241 242 if ((i = cdf_read_short_stream(&info, &h, &sat, &dir, &sst)) == -1) { 243 expn = "Cannot read short stream"; 244 goto out3; 245 } 246 #ifdef CDF_DEBUG 247 cdf_dump_dir(&info, &h, &sat, &ssat, &sst, &dir); 248 #endif 249 250 if ((i = cdf_read_summary_info(&info, &h, &sat, &ssat, &sst, &dir, 251 &scn)) == -1) { 252 if (errno == ESRCH) { 253 corrupt = expn; 254 expn = "No summary info"; 255 } else { 256 expn = "Cannot read summary info"; 257 } 258 goto out4; 259 } 260 #ifdef CDF_DEBUG 261 cdf_dump_summary_info(&h, &scn); 262 #endif 263 if ((i = cdf_file_summary_info(ms, &scn)) == -1) 264 expn = "Can't expand summary_info"; 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, "CDF V2 Document") == -1) 277 return -1; 278 if (*expn) 279 if (file_printf(ms, ", %s%s", corrupt, expn) == -1) 280 return -1; 281 i = 1; 282 } 283 return i; 284 } 285