readcdf.c revision 256281
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 29FILE_RCSID("@(#)$File: readcdf.c,v 1.29 2012/02/20 20:04:58 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 43private int 44cdf_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 = NULL; 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_FLOAT: 76 if (NOTMIME(ms) && file_printf(ms, ", %s: %g", buf, 77 info[i].pi_f) == -1) 78 return -1; 79 break; 80 case CDF_DOUBLE: 81 if (NOTMIME(ms) && file_printf(ms, ", %s: %g", buf, 82 info[i].pi_d) == -1) 83 return -1; 84 break; 85 case CDF_LENGTH32_STRING: 86 case CDF_LENGTH32_WSTRING: 87 len = info[i].pi_str.s_len; 88 if (len > 1) { 89 char vbuf[1024]; 90 size_t j, k = 1; 91 92 if (info[i].pi_type == CDF_LENGTH32_WSTRING) 93 k++; 94 s = info[i].pi_str.s_buf; 95 for (j = 0; j < sizeof(vbuf) && len--; 96 j++, s += k) { 97 if (*s == '\0') 98 break; 99 if (isprint((unsigned char)*s)) 100 vbuf[j] = *s; 101 } 102 if (j == sizeof(vbuf)) 103 --j; 104 vbuf[j] = '\0'; 105 if (NOTMIME(ms)) { 106 if (vbuf[0]) { 107 if (file_printf(ms, ", %s: %s", 108 buf, vbuf) == -1) 109 return -1; 110 } 111 } else if (info[i].pi_id == 112 CDF_PROPERTY_NAME_OF_APPLICATION) { 113 if (strstr(vbuf, "Word")) 114 str = "msword"; 115 else if (strstr(vbuf, "Excel")) 116 str = "vnd.ms-excel"; 117 else if (strstr(vbuf, "Powerpoint")) 118 str = "vnd.ms-powerpoint"; 119 else if (strstr(vbuf, 120 "Crystal Reports")) 121 str = "x-rpt"; 122 } 123 } 124 break; 125 case CDF_FILETIME: 126 tp = info[i].pi_tp; 127 if (tp != 0) { 128 if (tp < 1000000000000000LL) { 129 char tbuf[64]; 130 cdf_print_elapsed_time(tbuf, 131 sizeof(tbuf), tp); 132 if (NOTMIME(ms) && file_printf(ms, 133 ", %s: %s", buf, tbuf) == -1) 134 return -1; 135 } else { 136 char *c, *ec; 137 cdf_timestamp_to_timespec(&ts, tp); 138 c = cdf_ctime(&ts.tv_sec); 139 if ((ec = strchr(c, '\n')) != NULL) 140 *ec = '\0'; 141 142 if (NOTMIME(ms) && file_printf(ms, 143 ", %s: %s", buf, c) == -1) 144 return -1; 145 } 146 } 147 break; 148 case CDF_CLIPBOARD: 149 break; 150 default: 151 return -1; 152 } 153 } 154 if (!NOTMIME(ms)) { 155 if (str == NULL) 156 return 0; 157 if (file_printf(ms, "application/%s", str) == -1) 158 return -1; 159 } 160 return 1; 161} 162 163private int 164cdf_file_summary_info(struct magic_set *ms, const cdf_header_t *h, 165 const cdf_stream_t *sst) 166{ 167 cdf_summary_info_header_t si; 168 cdf_property_info_t *info; 169 size_t count; 170 int m; 171 172 if (cdf_unpack_summary_info(sst, h, &si, &info, &count) == -1) 173 return -1; 174 175 if (NOTMIME(ms)) { 176 if (file_printf(ms, "Composite Document File V2 Document") 177 == -1) 178 return -1; 179 180 if (file_printf(ms, ", %s Endian", 181 si.si_byte_order == 0xfffe ? "Little" : "Big") == -1) 182 return -2; 183 switch (si.si_os) { 184 case 2: 185 if (file_printf(ms, ", Os: Windows, Version %d.%d", 186 si.si_os_version & 0xff, 187 (uint32_t)si.si_os_version >> 8) == -1) 188 return -2; 189 break; 190 case 1: 191 if (file_printf(ms, ", Os: MacOS, Version %d.%d", 192 (uint32_t)si.si_os_version >> 8, 193 si.si_os_version & 0xff) == -1) 194 return -2; 195 break; 196 default: 197 if (file_printf(ms, ", Os %d, Version: %d.%d", si.si_os, 198 si.si_os_version & 0xff, 199 (uint32_t)si.si_os_version >> 8) == -1) 200 return -2; 201 break; 202 } 203 } 204 205 m = cdf_file_property_info(ms, info, count); 206 free(info); 207 208 return m == -1 ? -2 : m; 209} 210 211protected int 212file_trycdf(struct magic_set *ms, int fd, const unsigned char *buf, 213 size_t nbytes) 214{ 215 cdf_info_t info; 216 cdf_header_t h; 217 cdf_sat_t sat, ssat; 218 cdf_stream_t sst, scn; 219 cdf_dir_t dir; 220 int i; 221 const char *expn = ""; 222 const char *corrupt = "corrupt: "; 223 224 info.i_fd = fd; 225 info.i_buf = buf; 226 info.i_len = nbytes; 227 if (ms->flags & MAGIC_APPLE) 228 return 0; 229 if (cdf_read_header(&info, &h) == -1) 230 return 0; 231#ifdef CDF_DEBUG 232 cdf_dump_header(&h); 233#endif 234 235 if ((i = cdf_read_sat(&info, &h, &sat)) == -1) { 236 expn = "Can't read SAT"; 237 goto out0; 238 } 239#ifdef CDF_DEBUG 240 cdf_dump_sat("SAT", &sat, CDF_SEC_SIZE(&h)); 241#endif 242 243 if ((i = cdf_read_ssat(&info, &h, &sat, &ssat)) == -1) { 244 expn = "Can't read SSAT"; 245 goto out1; 246 } 247#ifdef CDF_DEBUG 248 cdf_dump_sat("SSAT", &ssat, CDF_SHORT_SEC_SIZE(&h)); 249#endif 250 251 if ((i = cdf_read_dir(&info, &h, &sat, &dir)) == -1) { 252 expn = "Can't read directory"; 253 goto out2; 254 } 255 256 if ((i = cdf_read_short_stream(&info, &h, &sat, &dir, &sst)) == -1) { 257 expn = "Cannot read short stream"; 258 goto out3; 259 } 260#ifdef CDF_DEBUG 261 cdf_dump_dir(&info, &h, &sat, &ssat, &sst, &dir); 262#endif 263 264 if ((i = cdf_read_summary_info(&info, &h, &sat, &ssat, &sst, &dir, 265 &scn)) == -1) { 266 if (errno == ESRCH) { 267 corrupt = expn; 268 expn = "No summary info"; 269 } else { 270 expn = "Cannot read summary info"; 271 } 272 goto out4; 273 } 274#ifdef CDF_DEBUG 275 cdf_dump_summary_info(&h, &scn); 276#endif 277 if ((i = cdf_file_summary_info(ms, &h, &scn)) < 0) 278 expn = "Can't expand summary_info"; 279 if (i == 0) { 280 const char *str = "vnd.ms-office"; 281 cdf_directory_t *d; 282 char name[__arraycount(d->d_name)]; 283 size_t j, k; 284 for (j = 0; j < dir.dir_len; j++) { 285 d = &dir.dir_tab[j]; 286 for (k = 0; k < sizeof(name); k++) 287 name[k] = (char)cdf_tole2(d->d_name[k]); 288 if (strstr(name, "WordDocument") == 0) { 289 str = "msword"; 290 break; 291 } 292 } 293 if (file_printf(ms, "application/%s", str) == -1) 294 return -1; 295 i = 1; 296 } 297 free(scn.sst_tab); 298out4: 299 free(sst.sst_tab); 300out3: 301 free(dir.dir_tab); 302out2: 303 free(ssat.sat_tab); 304out1: 305 free(sat.sat_tab); 306out0: 307 if (i != 1) { 308 if (i == -1) 309 if (file_printf(ms, "Composite Document File V2 Document") 310 == -1) 311 return -1; 312 if (*expn) 313 if (file_printf(ms, ", %s%s", corrupt, expn) == -1) 314 return -1; 315 i = 1; 316 } 317 return i; 318} 319