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https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
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270 lines
6.5 KiB
C
270 lines
6.5 KiB
C
/*-
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* Copyright (c) 2008 Christos Zoulas
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "file.h"
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#ifndef lint
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FILE_RCSID("@(#)$File: readcdf.c,v 1.18 2009/05/06 20:48:22 christos Exp $")
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#endif
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <time.h>
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#include <ctype.h>
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#include "cdf.h"
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#include "magic.h"
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#define NOTMIME(ms) (((ms)->flags & MAGIC_MIME) == 0)
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private int
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cdf_file_property_info(struct magic_set *ms, const cdf_property_info_t *info,
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size_t count)
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{
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size_t i;
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cdf_timestamp_t tp;
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struct timespec ts;
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char buf[64];
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const char *str = "vnd.ms-office";
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const char *s;
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int len;
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for (i = 0; i < count; i++) {
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cdf_print_property_name(buf, sizeof(buf), info[i].pi_id);
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switch (info[i].pi_type) {
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case CDF_SIGNED16:
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if (NOTMIME(ms) && file_printf(ms, ", %s: %hd", buf,
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info[i].pi_s16) == -1)
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return -1;
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break;
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case CDF_SIGNED32:
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if (NOTMIME(ms) && file_printf(ms, ", %s: %d", buf,
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info[i].pi_s32) == -1)
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return -1;
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break;
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case CDF_UNSIGNED32:
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if (NOTMIME(ms) && file_printf(ms, ", %s: %u", buf,
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info[i].pi_u32) == -1)
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return -1;
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break;
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case CDF_LENGTH32_STRING:
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len = info[i].pi_str.s_len;
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if (len > 1) {
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s = info[i].pi_str.s_buf;
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if (NOTMIME(ms)) {
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char vbuf[1024];
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size_t j;
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for (j = 0; j < sizeof(vbuf) && len--;
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j++, s++) {
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if (*s == '\0')
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break;
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if (isprint((unsigned char)*s))
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vbuf[j] = *s;
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}
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if (j == sizeof(vbuf))
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--j;
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vbuf[j] = '\0';
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if (vbuf[0]) {
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if (file_printf(ms, ", %s: %s",
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buf, vbuf) == -1)
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return -1;
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}
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} else if (info[i].pi_id ==
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CDF_PROPERTY_NAME_OF_APPLICATION) {
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if (strstr(s, "Word"))
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str = "msword";
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else if (strstr(s, "Excel"))
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str = "vnd.ms-excel";
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else if (strstr(s, "Powerpoint"))
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str = "vnd.ms-powerpoint";
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}
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}
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break;
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case CDF_FILETIME:
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tp = info[i].pi_tp;
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if (tp != 0) {
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if (tp < 1000000000000000LL) {
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char tbuf[64];
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cdf_print_elapsed_time(tbuf,
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sizeof(tbuf), tp);
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if (NOTMIME(ms) && file_printf(ms,
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", %s: %s", buf, tbuf) == -1)
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return -1;
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} else {
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char *c, *ec;
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cdf_timestamp_to_timespec(&ts, tp);
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c = ctime(&ts.tv_sec);
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if ((ec = strchr(c, '\n')) != NULL)
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*ec = '\0';
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if (NOTMIME(ms) && file_printf(ms,
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", %s: %s", buf, c) == -1)
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return -1;
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}
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}
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break;
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case CDF_CLIPBOARD:
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break;
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default:
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return -1;
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}
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}
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if (!NOTMIME(ms)) {
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if (file_printf(ms, "application/%s", str) == -1)
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return -1;
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}
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return 1;
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}
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private int
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cdf_file_summary_info(struct magic_set *ms, const cdf_stream_t *sst)
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{
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cdf_summary_info_header_t si;
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cdf_property_info_t *info;
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size_t count;
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int m;
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if (cdf_unpack_summary_info(sst, &si, &info, &count) == -1)
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return -1;
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if (NOTMIME(ms)) {
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if (file_printf(ms, "CDF V2 Document") == -1)
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return -1;
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if (file_printf(ms, ", %s Endian",
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si.si_byte_order == 0xfffe ? "Little" : "Big") == -1)
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return -1;
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switch (si.si_os) {
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case 2:
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if (file_printf(ms, ", Os: Windows, Version %d.%d",
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si.si_os_version & 0xff, si.si_os_version >> 8)
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== -1)
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return -1;
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break;
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case 1:
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if (file_printf(ms, ", Os: MacOS, Version %d.%d",
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si.si_os_version >> 8, si.si_os_version & 0xff)
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== -1)
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return -1;
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break;
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default:
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if (file_printf(ms, ", Os %d, Version: %d.%d", si.si_os,
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si.si_os_version & 0xff, si.si_os_version >> 8)
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== -1)
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return -1;
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break;
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}
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}
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m = cdf_file_property_info(ms, info, count);
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free(info);
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return m;
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}
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protected int
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file_trycdf(struct magic_set *ms, int fd, const unsigned char *buf,
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size_t nbytes)
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{
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cdf_info_t info;
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cdf_header_t h;
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cdf_sat_t sat, ssat;
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cdf_stream_t sst, scn;
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cdf_dir_t dir;
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int i;
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const char *expn = "";
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info.i_fd = fd;
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info.i_buf = buf;
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info.i_len = nbytes;
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if (ms->flags & MAGIC_APPLE)
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return 0;
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if (cdf_read_header(&info, &h) == -1)
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return 0;
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#ifdef CDF_DEBUG
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cdf_dump_header(&h);
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#endif
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if ((i = cdf_read_sat(&info, &h, &sat)) == -1) {
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expn = "Can't read SAT";
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goto out0;
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}
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#ifdef CDF_DEBUG
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cdf_dump_sat("SAT", &sat, CDF_SEC_SIZE(&h));
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#endif
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if ((i = cdf_read_ssat(&info, &h, &sat, &ssat)) == -1) {
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expn = "Can't read SSAT";
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goto out1;
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}
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#ifdef CDF_DEBUG
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cdf_dump_sat("SSAT", &ssat, CDF_SHORT_SEC_SIZE(&h));
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#endif
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if ((i = cdf_read_dir(&info, &h, &sat, &dir)) == -1) {
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expn = "Can't read directory";
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goto out2;
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}
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if ((i = cdf_read_short_stream(&info, &h, &sat, &dir, &sst)) == -1) {
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expn = "Cannot read short stream";
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goto out3;
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}
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#ifdef CDF_DEBUG
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cdf_dump_dir(&info, &h, &sat, &ssat, &sst, &dir);
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#endif
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if ((i = cdf_read_summary_info(&info, &h, &sat, &ssat, &sst, &dir,
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&scn)) == -1) {
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expn = "Cannot read summary info";
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goto out4;
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}
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#ifdef CDF_DEBUG
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cdf_dump_summary_info(&h, &scn);
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#endif
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if ((i = cdf_file_summary_info(ms, &scn)) == -1)
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expn = "Can't expand summary_info";
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free(scn.sst_tab);
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out4:
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free(sst.sst_tab);
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out3:
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free(dir.dir_tab);
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out2:
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free(ssat.sat_tab);
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out1:
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free(sat.sat_tab);
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out0:
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if (i != 1) {
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if (file_printf(ms, "CDF V2 Document") == -1)
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return -1;
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if (*expn)
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if (file_printf(ms, ", corrupt: %s", expn) == -1)
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return -1;
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i = 1;
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}
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return i;
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}
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