1002 lines
34 KiB
C
1002 lines
34 KiB
C
/*
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* Extract component parts of OLE2 files (e.g. MS Office Documents)
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*
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* Copyright (C) 2013-2022 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
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* Copyright (C) 2007-2013 Sourcefire, Inc.
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*
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* Authors: Kevin Lin
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*
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* This program is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License version 2 as published by the
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* Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 51
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* Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#if HAVE_CONFIG_H
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#include "clamav-config.h"
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#endif
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
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#include <ctype.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <conv.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#if HAVE_ICONV
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#include <iconv.h>
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#endif
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#include "clamav.h"
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#include "others.h"
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#include "msdoc.h"
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#include "scanners.h"
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#include "fmap.h"
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#include "json_api.h"
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#include "entconv.h"
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#if HAVE_JSON
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static char *
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ole2_convert_utf(summary_ctx_t *sctx, char *begin, size_t sz, const char *encoding)
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{
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char *outbuf = NULL;
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#if HAVE_ICONV
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char *buf, *p1, *p2;
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off_t offset;
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size_t inlen, outlen, nonrev, sz2;
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size_t i;
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int attempt;
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iconv_t cd;
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#else
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UNUSEDPARAM(encoding);
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#endif
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if (NULL == begin) {
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cli_dbgmsg("ole2_convert_utf: invalid parameter\n");
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return NULL;
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}
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if (sz == 0) {
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cli_dbgmsg("ole2_convert_utf: converting empty string\n");
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return cli_calloc(1, 1); // Just send back an empty NULL-terminated string.
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}
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/* applies in the both case */
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if (sctx->codepage == CODEPAGE_US_7BIT_ASCII || sctx->codepage == CODEPAGE_UTF8) {
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char *track;
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size_t bcnt, scnt;
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outbuf = cli_calloc(1, sz + 1);
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if (!(outbuf))
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return NULL;
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memcpy(outbuf, begin, sz);
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track = outbuf + sz - 1;
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if ((sctx->codepage == CODEPAGE_UTF8) && (*track & 0x80)) { /* UTF-8 with a most significant bit */
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/* locate the start of the last character */
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for (bcnt = 1; (track != outbuf); track--, bcnt++) {
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if (((uint8_t)*track & 0xC0) != 0x80)
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break;
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}
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/* count number of set (1) significant bits */
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for (scnt = 0; scnt < sizeof(uint8_t) * 8; scnt++) {
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if (((uint8_t)*track & (0x80 >> scnt)) == 0)
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break;
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}
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if (bcnt != scnt) {
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cli_dbgmsg("ole2_convert_utf: cleaning out %zu bytes from incomplete utf-8 character length %zu\n",
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bcnt, scnt);
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for (; bcnt > 0; bcnt--, track++)
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*track = '\0';
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}
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}
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return outbuf;
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}
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#if HAVE_ICONV
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p1 = buf = cli_calloc(1, sz);
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if (!(buf))
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return NULL;
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memcpy(buf, begin, sz);
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inlen = sz;
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/* encoding lookup if not specified */
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if (!encoding) {
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for (i = 0; i < NUMCODEPAGES; ++i) {
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if (sctx->codepage == codepage_entries[i].codepage)
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encoding = codepage_entries[i].encoding;
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else if (sctx->codepage < codepage_entries[i].codepage) {
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/* assuming sorted array */
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break;
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}
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}
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if (!encoding) {
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cli_warnmsg("ole2_convert_utf: could not locate codepage encoding for %d\n", sctx->codepage);
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sctx->flags |= OLE2_CODEPAGE_ERROR_NOTFOUND;
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free(buf);
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return NULL;
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}
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}
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cd = iconv_open("UTF-8", encoding);
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if (cd == (iconv_t)(-1)) {
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char errbuf[128];
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cli_strerror(errno, errbuf, sizeof(errbuf));
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cli_errmsg("ole2_convert_utf: could not initialize iconv for encoding %s: %s\n", encoding, errbuf);
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sctx->flags |= OLE2_CODEPAGE_ERROR_UNINITED;
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} else {
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offset = 0;
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for (attempt = 1; attempt <= 3; ++attempt) {
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/* charset to UTF-8 should never exceed sz*6 */
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sz2 = (attempt * 2) * sz;
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/* use cli_realloc, reuse the buffer that has already been translated */
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outbuf = (char *)cli_realloc(outbuf, sz2 + 1);
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if (!outbuf) {
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free(buf);
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iconv_close(cd);
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return NULL;
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}
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outlen = sz2 - offset;
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p2 = outbuf + offset;
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/* conversion */
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nonrev = iconv(cd, &p1, &inlen, &p2, &outlen);
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if (errno == EILSEQ) {
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cli_dbgmsg("ole2_convert_utf: input buffer contains invalid character for its encoding\n");
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sctx->flags |= OLE2_CODEPAGE_ERROR_INVALID;
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break;
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} else if (errno == EINVAL && nonrev == (size_t)-1) {
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cli_dbgmsg("ole2_convert_utf: input buffer contains incomplete multibyte character\n");
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sctx->flags |= OLE2_CODEPAGE_ERROR_INCOMPLETE;
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break;
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} else if (inlen == 0) {
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// cli_dbgmsg("ole2_convert_utf: input buffer is successfully translated\n");
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break;
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}
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// outbuf[sz2 - outlen] = '\0';
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// cli_dbgmsg("%u %s\n", inlen, outbuf);
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offset = sz2 - outlen;
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if (attempt < 3)
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cli_dbgmsg("ole2_convert_utf: outbuf is too small, resizing %llu -> %llu\n",
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(long long unsigned)((attempt * 2) * sz), (long long unsigned)(((attempt + 1) * 2) * sz));
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}
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if (errno == E2BIG && nonrev == (size_t)-1) {
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cli_dbgmsg("ole2_convert_utf: buffer could not be fully translated\n");
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sctx->flags |= OLE2_CODEPAGE_ERROR_OUTBUFTOOSMALL;
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}
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outbuf[sz2 - outlen] = '\0';
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}
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iconv_close(cd);
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free(buf);
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#endif
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/* this should force base64 encoding if NULL */
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return outbuf;
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}
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static int
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ole2_process_property(summary_ctx_t *sctx, unsigned char *databuf, uint32_t offset)
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{
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uint16_t proptype, padding;
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int ret = CL_SUCCESS;
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if (cli_json_timeout_cycle_check(sctx->ctx, &(sctx->toval)) != CL_SUCCESS) {
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sctx->flags |= OLE2_SUMMARY_FLAG_TIMEOUT;
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return CL_ETIMEOUT;
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}
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if (offset + sizeof(proptype) + sizeof(padding) > sctx->pssize) {
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sctx->flags |= OLE2_SUMMARY_ERROR_OOB;
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return CL_EFORMAT;
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}
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memcpy(&proptype, databuf + offset, sizeof(proptype));
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offset += sizeof(proptype);
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memcpy(&padding, databuf + offset, sizeof(padding));
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offset += sizeof(padding);
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/* endian conversion */
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proptype = sum16_endian_convert(proptype);
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// cli_dbgmsg("proptype: 0x%04x\n", proptype);
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if (padding != 0) {
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cli_dbgmsg("ole2_process_property: invalid padding value, non-zero\n");
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sctx->flags |= OLE2_SUMMARY_ERROR_INVALID_ENTRY;
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return CL_EFORMAT;
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}
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switch (proptype) {
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case PT_EMPTY:
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case PT_NULL:
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ret = cli_jsonnull(sctx->summary, sctx->propname);
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break;
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case PT_INT16: {
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int16_t dout;
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if (offset + sizeof(dout) > sctx->pssize) {
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sctx->flags |= OLE2_SUMMARY_ERROR_OOB;
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return CL_EFORMAT;
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}
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memcpy(&dout, databuf + offset, sizeof(dout));
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offset += sizeof(dout);
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/* endian conversion */
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dout = sum16_endian_convert(dout);
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if (sctx->writecp) {
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sctx->codepage = (uint16_t)dout;
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ret = cli_jsonint(sctx->summary, sctx->propname, sctx->codepage);
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} else
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ret = cli_jsonint(sctx->summary, sctx->propname, dout);
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break;
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}
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case PT_INT32:
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case PT_INT32v1: {
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int32_t dout;
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if (offset + sizeof(dout) > sctx->pssize) {
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sctx->flags |= OLE2_SUMMARY_ERROR_OOB;
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return CL_EFORMAT;
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}
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memcpy(&dout, databuf + offset, sizeof(dout));
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offset += sizeof(dout);
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/* endian conversion */
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dout = sum32_endian_convert(dout);
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ret = cli_jsonint(sctx->summary, sctx->propname, dout);
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break;
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}
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case PT_FLOAT32: /* review this please */
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{
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float dout;
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if (offset + sizeof(dout) > sctx->pssize) {
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sctx->flags |= OLE2_SUMMARY_ERROR_OOB;
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return CL_EFORMAT;
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}
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memcpy(&dout, databuf + offset, sizeof(dout));
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offset += sizeof(dout);
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/* endian conversion */
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dout = sum32_endian_convert(dout);
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ret = cli_jsondouble(sctx->summary, sctx->propname, dout);
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break;
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}
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case PT_DATE:
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case PT_DOUBLE64: /* review this please */
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{
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double dout;
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if (offset + sizeof(dout) > sctx->pssize) {
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sctx->flags |= OLE2_SUMMARY_ERROR_OOB;
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return CL_EFORMAT;
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}
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memcpy(&dout, databuf + offset, sizeof(dout));
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offset += sizeof(dout);
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/* endian conversion */
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dout = sum64_endian_convert(dout);
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ret = cli_jsondouble(sctx->summary, sctx->propname, dout);
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break;
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}
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case PT_BOOL: {
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uint16_t dout;
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if (offset + sizeof(dout) > sctx->pssize) {
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sctx->flags |= OLE2_SUMMARY_ERROR_OOB;
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return CL_EFORMAT;
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}
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memcpy(&dout, databuf + offset, sizeof(dout));
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offset += sizeof(dout);
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/* no need for endian conversion */
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ret = cli_jsonbool(sctx->summary, sctx->propname, dout);
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break;
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}
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case PT_INT8v1: {
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int8_t dout;
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if (offset + sizeof(dout) > sctx->pssize) {
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sctx->flags |= OLE2_SUMMARY_ERROR_OOB;
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return CL_EFORMAT;
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}
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memcpy(&dout, databuf + offset, sizeof(dout));
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offset += sizeof(dout);
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/* no need for endian conversion */
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ret = cli_jsonint(sctx->summary, sctx->propname, dout);
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break;
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}
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case PT_UINT8: {
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uint8_t dout;
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if (offset + sizeof(dout) > sctx->pssize) {
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sctx->flags |= OLE2_SUMMARY_ERROR_OOB;
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return CL_EFORMAT;
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}
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memcpy(&dout, databuf + offset, sizeof(dout));
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offset += sizeof(dout);
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/* no need for endian conversion */
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ret = cli_jsonint(sctx->summary, sctx->propname, dout);
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break;
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}
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case PT_UINT16: {
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uint16_t dout;
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if (offset + sizeof(dout) > sctx->pssize) {
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sctx->flags |= OLE2_SUMMARY_ERROR_OOB;
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return CL_EFORMAT;
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}
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memcpy(&dout, databuf + offset, sizeof(dout));
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offset += sizeof(dout);
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/* endian conversion */
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dout = sum16_endian_convert(dout);
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if (sctx->writecp)
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sctx->codepage = dout;
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ret = cli_jsonint(sctx->summary, sctx->propname, dout);
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break;
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}
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case PT_UINT32:
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case PT_UINT32v1: {
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uint32_t dout;
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if (offset + sizeof(dout) > sctx->pssize) {
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sctx->flags |= OLE2_SUMMARY_ERROR_OOB;
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return CL_EFORMAT;
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}
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memcpy(&dout, databuf + offset, sizeof(dout));
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offset += sizeof(dout);
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/* endian conversion */
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dout = sum32_endian_convert(dout);
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ret = cli_jsonint(sctx->summary, sctx->propname, dout);
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break;
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}
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case PT_INT64: {
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int64_t dout;
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if (offset + sizeof(dout) > sctx->pssize) {
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sctx->flags |= OLE2_SUMMARY_ERROR_OOB;
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return CL_EFORMAT;
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}
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memcpy(&dout, databuf + offset, sizeof(dout));
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offset += sizeof(dout);
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/* endian conversion */
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dout = sum64_endian_convert(dout);
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ret = cli_jsonint64(sctx->summary, sctx->propname, dout);
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break;
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}
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case PT_UINT64: {
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uint64_t dout;
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if (offset + sizeof(dout) > sctx->pssize) {
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sctx->flags |= OLE2_SUMMARY_ERROR_OOB;
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return CL_EFORMAT;
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}
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memcpy(&dout, databuf + offset, sizeof(dout));
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offset += sizeof(dout);
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/* endian conversion */
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dout = sum64_endian_convert(dout);
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ret = cli_jsonint64(sctx->summary, sctx->propname, dout);
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break;
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}
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case PT_BSTR:
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case PT_LPSTR:
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if (sctx->codepage == 0) {
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cli_dbgmsg("ole2_propset_json: current codepage is unknown, cannot parse char stream\n");
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sctx->flags |= OLE2_SUMMARY_FLAG_CODEPAGE;
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} else {
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uint32_t strsize;
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char *outstr, *outstr2;
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if (offset + sizeof(strsize) > sctx->pssize) {
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sctx->flags |= OLE2_SUMMARY_ERROR_OOB;
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return CL_EFORMAT;
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}
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memcpy(&strsize, databuf + offset, sizeof(strsize));
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offset += sizeof(strsize);
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/* endian conversion? */
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strsize = sum32_endian_convert(strsize);
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if (offset + strsize > sctx->pssize) {
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sctx->flags |= OLE2_SUMMARY_ERROR_OOB;
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return CL_EFORMAT;
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}
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/* limitation on string length */
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if (strsize > PROPSTRLIMIT) {
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cli_dbgmsg("ole2_process_property: property string sized %lu truncated to size %lu\n",
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(unsigned long)strsize, (unsigned long)PROPSTRLIMIT);
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sctx->flags |= OLE2_SUMMARY_FLAG_TRUNC_STR;
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strsize = PROPSTRLIMIT;
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}
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outstr = cli_calloc(strsize + 1, 1); /* last char must be NULL */
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if (!outstr) {
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return CL_EMEM;
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}
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strncpy(outstr, (const char *)(databuf + offset), strsize);
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/* conversion of various encodings to UTF-8 */
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outstr2 = ole2_convert_utf(sctx, outstr, strsize, NULL);
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if (!outstr2) {
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/* use base64 encoding when all else fails! */
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char b64jstr[PROPSTRLIMIT];
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/* outstr2 should be 4/3 times the original (rounded up) */
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outstr2 = cl_base64_encode(outstr, strsize);
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if (!outstr2) {
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cli_dbgmsg("ole2_process_property: failed to convert to base64 string\n");
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free(outstr);
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return CL_EMEM;
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}
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snprintf(b64jstr, PROPSTRLIMIT, "%s_base64", sctx->propname);
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ret = cli_jsonbool(sctx->summary, b64jstr, 1);
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if (ret != CL_SUCCESS) {
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free(outstr);
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free(outstr2);
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return ret;
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}
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}
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ret = cli_jsonstr(sctx->summary, sctx->propname, outstr2);
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free(outstr);
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free(outstr2);
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}
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break;
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case PT_LPWSTR: {
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uint32_t strsize;
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char *outstr, *outstr2;
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if (offset + sizeof(strsize) > sctx->pssize) {
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sctx->flags |= OLE2_SUMMARY_ERROR_OOB;
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return CL_EFORMAT;
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}
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memcpy(&strsize, databuf + offset, sizeof(strsize));
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offset += sizeof(strsize);
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/* endian conversion; wide strings are by length, not size (x2) */
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strsize = sum32_endian_convert(strsize) * 2;
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/* limitation on string length */
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if (strsize > (2 * PROPSTRLIMIT)) {
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cli_dbgmsg("ole2_process_property: property string sized %lu truncated to size %lu\n",
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(unsigned long)strsize, (unsigned long)(2 * PROPSTRLIMIT));
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sctx->flags |= OLE2_SUMMARY_FLAG_TRUNC_STR;
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strsize = (2 * PROPSTRLIMIT);
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}
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if (offset + strsize > sctx->pssize) {
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sctx->flags |= OLE2_SUMMARY_ERROR_OOB;
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return CL_EFORMAT;
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}
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outstr = cli_calloc(strsize + 2, 1); /* last two chars must be NULL */
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if (!outstr) {
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return CL_EMEM;
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}
|
|
memcpy(outstr, (const char *)(databuf + offset), strsize);
|
|
/* conversion of 16-width char strings (UTF-16 or UTF-16LE??) to UTF-8 */
|
|
outstr2 = ole2_convert_utf(sctx, outstr, strsize, UTF16_MS);
|
|
if (!outstr2) {
|
|
/* use base64 encoding when all else fails! */
|
|
char b64jstr[PROPSTRLIMIT];
|
|
|
|
outstr2 = cl_base64_encode(outstr, strsize);
|
|
if (!outstr2) {
|
|
free(outstr);
|
|
return CL_EMEM;
|
|
}
|
|
|
|
snprintf(b64jstr, PROPSTRLIMIT, "%s_base64", sctx->propname);
|
|
ret = cli_jsonbool(sctx->summary, b64jstr, 1);
|
|
if (ret != CL_SUCCESS) {
|
|
free(outstr);
|
|
free(outstr2);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
ret = cli_jsonstr(sctx->summary, sctx->propname, outstr2);
|
|
free(outstr);
|
|
free(outstr2);
|
|
break;
|
|
}
|
|
case PT_FILETIME: {
|
|
uint32_t ltime, htime;
|
|
uint64_t wtime = 0, utime = 0;
|
|
|
|
if (offset + sizeof(ltime) + sizeof(htime) > sctx->pssize) {
|
|
sctx->flags |= OLE2_SUMMARY_ERROR_OOB;
|
|
return CL_EFORMAT;
|
|
}
|
|
memcpy(<ime, databuf + offset, sizeof(ltime));
|
|
offset += sizeof(ltime);
|
|
memcpy(&htime, databuf + offset, sizeof(htime));
|
|
offset += sizeof(ltime);
|
|
ltime = sum32_endian_convert(ltime);
|
|
htime = sum32_endian_convert(htime);
|
|
|
|
/* UNIX timestamp formatting */
|
|
wtime = htime;
|
|
wtime <<= 32;
|
|
wtime |= ltime;
|
|
|
|
utime = wtime / 10000000;
|
|
utime -= 11644473600LL;
|
|
|
|
if ((uint32_t)((utime & 0xFFFFFFFF00000000) >> 32)) {
|
|
cli_dbgmsg("ole2_process_property: UNIX timestamp is larger than 32-bit number\n");
|
|
} else {
|
|
ret = cli_jsonint(sctx->summary, sctx->propname, (uint32_t)(utime & 0xFFFFFFFF));
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
cli_dbgmsg("ole2_process_property: unhandled property type 0x%04x for %s property\n",
|
|
proptype, sctx->propname);
|
|
sctx->flags |= OLE2_SUMMARY_FLAG_UNHANDLED_PROPTYPE;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void ole2_translate_docsummary_propid(summary_ctx_t *sctx, uint32_t propid)
|
|
{
|
|
switch (propid) {
|
|
case DSPID_CODEPAGE:
|
|
sctx->writecp = 1; /* must be set ONLY for codepage */
|
|
sctx->propname = "CodePage";
|
|
break;
|
|
case DSPID_CATEGORY:
|
|
sctx->propname = "Category";
|
|
break;
|
|
case DSPID_PRESFORMAT:
|
|
sctx->propname = "PresentationTarget";
|
|
break;
|
|
case DSPID_BYTECOUNT:
|
|
sctx->propname = "Bytes";
|
|
break;
|
|
case DSPID_LINECOUNT:
|
|
sctx->propname = "Lines";
|
|
break;
|
|
case DSPID_PARCOUNT:
|
|
sctx->propname = "Paragraphs";
|
|
break;
|
|
case DSPID_SLIDECOUNT:
|
|
sctx->propname = "Slides";
|
|
break;
|
|
case DSPID_NOTECOUNT:
|
|
sctx->propname = "Notes";
|
|
break;
|
|
case DSPID_HIDDENCOUNT:
|
|
sctx->propname = "HiddenSlides";
|
|
break;
|
|
case DSPID_MMCLIPCOUNT:
|
|
sctx->propname = "MMClips";
|
|
break;
|
|
case DSPID_SCALE:
|
|
sctx->propname = "Scale";
|
|
break;
|
|
case DSPID_HEADINGPAIR: /* VT_VARIANT | VT_VECTOR */
|
|
sctx->propname = "HeadingPairs";
|
|
break;
|
|
case DSPID_DOCPARTS: /* VT_VECTOR | VT_LPSTR */
|
|
sctx->propname = "DocPartTitles";
|
|
break;
|
|
case DSPID_MANAGER:
|
|
sctx->propname = "Manager";
|
|
break;
|
|
case DSPID_COMPANY:
|
|
sctx->propname = "Company";
|
|
break;
|
|
case DSPID_LINKSDIRTY:
|
|
sctx->propname = "LinksDirty";
|
|
break;
|
|
case DSPID_CCHWITHSPACES:
|
|
sctx->propname = "Char&WSCount";
|
|
break;
|
|
case DSPID_SHAREDDOC: /* SHOULD BE FALSE! */
|
|
sctx->propname = "SharedDoc";
|
|
break;
|
|
case DSPID_LINKBASE: /* moved to user-defined */
|
|
sctx->propname = "LinkBase";
|
|
break;
|
|
case DSPID_HLINKS: /* moved to user-defined */
|
|
sctx->propname = "HyperLinks";
|
|
break;
|
|
case DSPID_HYPERLINKSCHANGED:
|
|
sctx->propname = "HyperLinksChanged";
|
|
break;
|
|
case DSPID_VERSION:
|
|
sctx->propname = "Version";
|
|
break;
|
|
case DSPID_DIGSIG:
|
|
sctx->propname = "DigitalSig";
|
|
break;
|
|
case DSPID_CONTENTTYPE:
|
|
sctx->propname = "ContentType";
|
|
break;
|
|
case DSPID_CONTENTSTATUS:
|
|
sctx->propname = "ContentStatus";
|
|
break;
|
|
case DSPID_LANGUAGE:
|
|
sctx->propname = "Language";
|
|
break;
|
|
case DSPID_DOCVERSION:
|
|
sctx->propname = "DocVersion";
|
|
break;
|
|
default:
|
|
cli_dbgmsg("ole2_docsum_propset_json: unrecognized propid!\n");
|
|
sctx->flags |= OLE2_SUMMARY_FLAG_UNKNOWN_PROPID;
|
|
}
|
|
}
|
|
|
|
static void ole2_translate_summary_propid(summary_ctx_t *sctx, uint32_t propid)
|
|
{
|
|
switch (propid) {
|
|
case SPID_CODEPAGE:
|
|
sctx->writecp = 1; /* must be set ONLY for codepage */
|
|
sctx->propname = "CodePage";
|
|
break;
|
|
case SPID_TITLE:
|
|
sctx->propname = "Title";
|
|
break;
|
|
case SPID_SUBJECT:
|
|
sctx->propname = "Subject";
|
|
break;
|
|
case SPID_AUTHOR:
|
|
sctx->propname = "Author";
|
|
break;
|
|
case SPID_KEYWORDS:
|
|
sctx->propname = "Keywords";
|
|
break;
|
|
case SPID_COMMENTS:
|
|
sctx->propname = "Comments";
|
|
break;
|
|
case SPID_TEMPLATE:
|
|
sctx->propname = "Template";
|
|
break;
|
|
case SPID_LASTAUTHOR:
|
|
sctx->propname = "LastAuthor";
|
|
break;
|
|
case SPID_REVNUMBER:
|
|
sctx->propname = "RevNumber";
|
|
break;
|
|
case SPID_EDITTIME:
|
|
sctx->propname = "EditTime";
|
|
break;
|
|
case SPID_LASTPRINTED:
|
|
sctx->propname = "LastPrinted";
|
|
break;
|
|
case SPID_CREATEDTIME:
|
|
sctx->propname = "CreatedTime";
|
|
break;
|
|
case SPID_MODIFIEDTIME:
|
|
sctx->propname = "ModifiedTime";
|
|
break;
|
|
case SPID_PAGECOUNT:
|
|
sctx->propname = "PageCount";
|
|
break;
|
|
case SPID_WORDCOUNT:
|
|
sctx->propname = "WordCount";
|
|
break;
|
|
case SPID_CHARCOUNT:
|
|
sctx->propname = "CharCount";
|
|
break;
|
|
case SPID_THUMBNAIL:
|
|
sctx->propname = "Thumbnail";
|
|
break;
|
|
case SPID_APPNAME:
|
|
sctx->propname = "AppName";
|
|
break;
|
|
case SPID_SECURITY:
|
|
sctx->propname = "Security";
|
|
break;
|
|
default:
|
|
cli_dbgmsg("ole2_translate_summary_propid: unrecognized propid!\n");
|
|
sctx->flags |= OLE2_SUMMARY_FLAG_UNKNOWN_PROPID;
|
|
}
|
|
}
|
|
|
|
static int ole2_summary_propset_json(summary_ctx_t *sctx, off_t offset)
|
|
{
|
|
unsigned char *hdr, *ps;
|
|
uint32_t numprops, limitprops;
|
|
off_t foff = offset, psoff = 0;
|
|
uint32_t poffset;
|
|
int ret;
|
|
uint32_t i;
|
|
|
|
cli_dbgmsg("in ole2_summary_propset_json\n");
|
|
|
|
/* summary ctx propset-specific setup*/
|
|
sctx->codepage = 0;
|
|
sctx->writecp = 0;
|
|
sctx->propname = NULL;
|
|
|
|
/* examine property set metadata */
|
|
if ((foff + (2 * sizeof(uint32_t))) > sctx->maplen) {
|
|
sctx->flags |= OLE2_SUMMARY_ERROR_TOOSMALL;
|
|
return CL_EFORMAT;
|
|
}
|
|
hdr = (unsigned char *)fmap_need_off_once(sctx->sfmap, foff, (2 * sizeof(uint32_t)));
|
|
if (!hdr) {
|
|
sctx->flags |= OLE2_SUMMARY_ERROR_DATABUF;
|
|
return CL_EREAD;
|
|
}
|
|
// foff+=(2*sizeof(uint32_t)); // keep foff pointing to start of propset segment
|
|
psoff += (2 * sizeof(uint32_t));
|
|
memcpy(&(sctx->pssize), hdr, sizeof(sctx->pssize));
|
|
memcpy(&numprops, hdr + sizeof(sctx->pssize), sizeof(numprops));
|
|
/* endian conversion */
|
|
sctx->pssize = sum32_endian_convert(sctx->pssize);
|
|
numprops = sum32_endian_convert(numprops);
|
|
cli_dbgmsg("ole2_summary_propset_json: pssize: %u, numprops: %u\n", sctx->pssize, numprops);
|
|
if (numprops > PROPCNTLIMIT) {
|
|
sctx->flags |= OLE2_SUMMARY_LIMIT_PROPS;
|
|
limitprops = PROPCNTLIMIT;
|
|
} else {
|
|
limitprops = numprops;
|
|
}
|
|
cli_dbgmsg("ole2_summary_propset_json: processing %u of %u (%u max) properties\n",
|
|
limitprops, numprops, PROPCNTLIMIT);
|
|
|
|
/* extract remaining fragment of propset */
|
|
if ((size_t)(foff + (sctx->pssize)) > (size_t)(sctx->maplen)) {
|
|
sctx->flags |= OLE2_SUMMARY_ERROR_TOOSMALL;
|
|
return CL_EFORMAT;
|
|
}
|
|
ps = (unsigned char *)fmap_need_off_once(sctx->sfmap, foff, sctx->pssize);
|
|
if (!ps) {
|
|
sctx->flags |= OLE2_SUMMARY_ERROR_DATABUF;
|
|
return CL_EREAD;
|
|
}
|
|
|
|
/* iterate over the properties */
|
|
for (i = 0; i < limitprops; ++i) {
|
|
uint32_t propid, propoff;
|
|
|
|
if (psoff + sizeof(propid) + sizeof(poffset) > sctx->pssize) {
|
|
sctx->flags |= OLE2_SUMMARY_ERROR_OOB;
|
|
return CL_EFORMAT;
|
|
}
|
|
memcpy(&propid, ps + psoff, sizeof(propid));
|
|
psoff += sizeof(propid);
|
|
memcpy(&propoff, ps + psoff, sizeof(propoff));
|
|
psoff += sizeof(propoff);
|
|
/* endian conversion */
|
|
propid = sum32_endian_convert(propid);
|
|
propoff = sum32_endian_convert(propoff);
|
|
cli_dbgmsg("ole2_summary_propset_json: propid: 0x%08x, propoff: %u\n", propid, propoff);
|
|
|
|
sctx->propname = NULL;
|
|
sctx->writecp = 0;
|
|
switch (sctx->mode) {
|
|
case 1:
|
|
ole2_translate_docsummary_propid(sctx, propid);
|
|
break;
|
|
default:
|
|
ole2_translate_summary_propid(sctx, propid);
|
|
}
|
|
|
|
if (sctx->propname != NULL) {
|
|
ret = ole2_process_property(sctx, ps, propoff);
|
|
if (ret != CL_SUCCESS)
|
|
return ret;
|
|
} else {
|
|
/* add unknown propid flag */
|
|
}
|
|
}
|
|
|
|
return CL_SUCCESS;
|
|
}
|
|
|
|
static int cli_ole2_summary_json_cleanup(summary_ctx_t *sctx, int retcode)
|
|
{
|
|
json_object *jarr;
|
|
|
|
cli_dbgmsg("in cli_ole2_summary_json_cleanup: %d[%x]\n", retcode, sctx->flags);
|
|
|
|
if (sctx->sfmap) {
|
|
funmap(sctx->sfmap);
|
|
}
|
|
|
|
if (sctx->flags) {
|
|
jarr = cli_jsonarray(sctx->summary, "ParseErrors");
|
|
|
|
/* summary errors */
|
|
if (sctx->flags & OLE2_SUMMARY_ERROR_TOOSMALL) {
|
|
cli_jsonstr(jarr, NULL, "OLE2_SUMMARY_ERROR_TOOSMALL");
|
|
}
|
|
if (sctx->flags & OLE2_SUMMARY_ERROR_OOB) {
|
|
cli_jsonstr(jarr, NULL, "OLE2_SUMMARY_ERROR_OOB");
|
|
}
|
|
if (sctx->flags & OLE2_SUMMARY_ERROR_DATABUF) {
|
|
cli_jsonstr(jarr, NULL, "OLE2_SUMMARY_ERROR_DATABUF");
|
|
}
|
|
if (sctx->flags & OLE2_SUMMARY_ERROR_INVALID_ENTRY) {
|
|
cli_jsonstr(jarr, NULL, "OLE2_SUMMARY_ERROR_INVALID_ENTRY");
|
|
}
|
|
if (sctx->flags & OLE2_SUMMARY_LIMIT_PROPS) {
|
|
cli_jsonstr(jarr, NULL, "OLE2_SUMMARY_LIMIT_PROPS");
|
|
}
|
|
if (sctx->flags & OLE2_SUMMARY_FLAG_TIMEOUT) {
|
|
cli_jsonstr(jarr, NULL, "OLE2_SUMMARY_FLAG_TIMEOUT");
|
|
}
|
|
if (sctx->flags & OLE2_SUMMARY_FLAG_CODEPAGE) {
|
|
cli_jsonstr(jarr, NULL, "OLE2_SUMMARY_FLAG_CODEPAGE");
|
|
}
|
|
if (sctx->flags & OLE2_SUMMARY_FLAG_UNKNOWN_PROPID) {
|
|
cli_jsonstr(jarr, NULL, "OLE2_SUMMARY_FLAG_UNKNOWN_PROPID");
|
|
}
|
|
if (sctx->flags & OLE2_SUMMARY_FLAG_UNHANDLED_PROPTYPE) {
|
|
cli_jsonstr(jarr, NULL, "OLE2_SUMMARY_FLAG_UNHANDLED_PROPTYPE");
|
|
}
|
|
if (sctx->flags & OLE2_SUMMARY_FLAG_TRUNC_STR) {
|
|
cli_jsonstr(jarr, NULL, "OLE2_SUMMARY_FLAG_TRUNC_STR");
|
|
}
|
|
|
|
/* codepage translation errors */
|
|
if (sctx->flags & OLE2_CODEPAGE_ERROR_NOTFOUND) {
|
|
cli_jsonstr(jarr, NULL, "OLE2_CODEPAGE_ERROR_NOTFOUND");
|
|
}
|
|
if (sctx->flags & OLE2_CODEPAGE_ERROR_UNINITED) {
|
|
cli_jsonstr(jarr, NULL, "OLE2_CODEPAGE_ERROR_UNINITED");
|
|
}
|
|
if (sctx->flags & OLE2_CODEPAGE_ERROR_INVALID) {
|
|
cli_jsonstr(jarr, NULL, "OLE2_CODEPAGE_ERROR_INVALID");
|
|
}
|
|
if (sctx->flags & OLE2_CODEPAGE_ERROR_INCOMPLETE) {
|
|
cli_jsonstr(jarr, NULL, "OLE2_CODEPAGE_ERROR_INCOMPLETE");
|
|
}
|
|
if (sctx->flags & OLE2_CODEPAGE_ERROR_OUTBUFTOOSMALL) {
|
|
cli_jsonstr(jarr, NULL, "OLE2_CODEPAGE_ERROR_OUTBUFTOOSMALL");
|
|
}
|
|
}
|
|
|
|
return retcode;
|
|
}
|
|
|
|
int cli_ole2_summary_json(cli_ctx *ctx, int fd, int mode)
|
|
{
|
|
summary_ctx_t sctx;
|
|
STATBUF statbuf;
|
|
off_t foff = 0;
|
|
unsigned char *databuf;
|
|
summary_stub_t sumstub;
|
|
propset_entry_t pentry;
|
|
int ret = CL_SUCCESS;
|
|
|
|
cli_dbgmsg("in cli_ole2_summary_json\n");
|
|
|
|
/* preliminary sanity checks */
|
|
if (ctx == NULL) {
|
|
return CL_ENULLARG;
|
|
}
|
|
|
|
if (fd < 0) {
|
|
cli_dbgmsg("ole2_summary_json: invalid file descriptor\n");
|
|
return CL_ENULLARG; /* placeholder */
|
|
}
|
|
|
|
if (mode < 0 || mode > 2) {
|
|
cli_dbgmsg("ole2_summary_json: invalid mode specified\n");
|
|
return CL_ENULLARG; /* placeholder */
|
|
}
|
|
|
|
/* summary ctx setup */
|
|
memset(&sctx, 0, sizeof(sctx));
|
|
sctx.ctx = ctx;
|
|
sctx.mode = mode;
|
|
|
|
if (FSTAT(fd, &statbuf) == -1) {
|
|
cli_dbgmsg("ole2_summary_json: cannot stat file descriptor\n");
|
|
return CL_ESTAT;
|
|
}
|
|
|
|
sctx.sfmap = fmap(fd, 0, statbuf.st_size, NULL);
|
|
if (!sctx.sfmap) {
|
|
cli_dbgmsg("ole2_summary_json: failed to get fmap\n");
|
|
return CL_EMAP;
|
|
}
|
|
sctx.maplen = sctx.sfmap->len;
|
|
cli_dbgmsg("ole2_summary_json: streamsize: %zu\n", sctx.maplen);
|
|
|
|
switch (mode) {
|
|
case 1:
|
|
sctx.summary = cli_jsonobj(ctx->wrkproperty, "DocSummaryInfo");
|
|
break;
|
|
case 2:
|
|
sctx.summary = cli_jsonobj(ctx->wrkproperty, "Hwp5SummaryInfo");
|
|
break;
|
|
case 0:
|
|
default:
|
|
sctx.summary = cli_jsonobj(ctx->wrkproperty, "SummaryInfo");
|
|
break;
|
|
}
|
|
|
|
if (!sctx.summary) {
|
|
cli_errmsg("ole2_summary_json: no memory for json object.\n");
|
|
return cli_ole2_summary_json_cleanup(&sctx, CL_EMEM);
|
|
}
|
|
|
|
sctx.codepage = 0;
|
|
sctx.writecp = 0;
|
|
|
|
/* acquire property stream metadata */
|
|
if (sctx.maplen < sizeof(summary_stub_t)) {
|
|
sctx.flags |= OLE2_SUMMARY_ERROR_TOOSMALL;
|
|
return cli_ole2_summary_json_cleanup(&sctx, CL_EFORMAT);
|
|
}
|
|
databuf = (unsigned char *)fmap_need_off_once(sctx.sfmap, foff, sizeof(summary_stub_t));
|
|
if (!databuf) {
|
|
sctx.flags |= OLE2_SUMMARY_ERROR_DATABUF;
|
|
return cli_ole2_summary_json_cleanup(&sctx, CL_EREAD);
|
|
}
|
|
foff += sizeof(summary_stub_t);
|
|
memcpy(&sumstub, databuf, sizeof(summary_stub_t));
|
|
|
|
/* endian conversion and checks */
|
|
sumstub.byte_order = le16_to_host(sumstub.byte_order);
|
|
if (sumstub.byte_order != 0xfffe) {
|
|
cli_dbgmsg("ole2_summary_json: byteorder 0x%x is invalid\n", sumstub.byte_order);
|
|
sctx.flags |= OLE2_SUMMARY_ERROR_INVALID_ENTRY;
|
|
return cli_ole2_summary_json_cleanup(&sctx, CL_EFORMAT);
|
|
}
|
|
sumstub.version = sum16_endian_convert(sumstub.version); /*unused*/
|
|
sumstub.system = sum32_endian_convert(sumstub.system); /*unused*/
|
|
sumstub.num_propsets = sum32_endian_convert(sumstub.num_propsets);
|
|
if (sumstub.num_propsets != 1 && sumstub.num_propsets != 2) {
|
|
cli_dbgmsg("ole2_summary_json: invalid number of property sets\n");
|
|
sctx.flags |= OLE2_SUMMARY_ERROR_INVALID_ENTRY;
|
|
return cli_ole2_summary_json_cleanup(&sctx, CL_EFORMAT);
|
|
}
|
|
|
|
cli_dbgmsg("ole2_summary_json: byteorder 0x%x\n", sumstub.byte_order);
|
|
cli_dbgmsg("ole2_summary_json: %u property set(s) detected\n", sumstub.num_propsets);
|
|
|
|
/* first property set (index=0) is always SummaryInfo or DocSummaryInfo */
|
|
if ((sctx.maplen - foff) < sizeof(propset_entry_t)) {
|
|
sctx.flags |= OLE2_SUMMARY_ERROR_TOOSMALL;
|
|
return cli_ole2_summary_json_cleanup(&sctx, CL_EFORMAT);
|
|
}
|
|
databuf = (unsigned char *)fmap_need_off_once(sctx.sfmap, foff, sizeof(propset_entry_t));
|
|
if (!databuf) {
|
|
sctx.flags |= OLE2_SUMMARY_ERROR_DATABUF;
|
|
return cli_ole2_summary_json_cleanup(&sctx, CL_EREAD);
|
|
}
|
|
foff += sizeof(propset_entry_t);
|
|
memcpy(&pentry, databuf, sizeof(propset_entry_t));
|
|
/* endian conversion */
|
|
pentry.offset = sum32_endian_convert(pentry.offset);
|
|
|
|
if ((ret = ole2_summary_propset_json(&sctx, pentry.offset)) != CL_SUCCESS) {
|
|
return cli_ole2_summary_json_cleanup(&sctx, ret);
|
|
}
|
|
|
|
/* second property set (index=1) is always a custom property set (if present) */
|
|
if (sumstub.num_propsets == 2) {
|
|
cli_jsonbool(ctx->wrkproperty, "HasUserDefinedProperties", 1);
|
|
}
|
|
|
|
return cli_ole2_summary_json_cleanup(&sctx, CL_SUCCESS);
|
|
}
|
|
#endif /* HAVE_JSON */
|