1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330
|
/*
*
* This is a sample file that shows how to use some of the basic C++
* POSIX-style library functions in The Sleuth Kit (www.sleuthkit.org).
* There are also callback-style functions that can be used to read
* the data and partitions.
*
* Copyright (c) 2008>, Brian Carrier <carrier <at> sleuthkit <dot> org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - Neither the Sleuth Kit name nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <tsk/libtsk.h>
static TskHdbInfo *hdb_info;
#define DO_HASHING 1
#define DO_HASHLOOKUP 0
/**
* dent_walk callback function
*/
static TSK_WALK_RET_ENUM
fileAct(TskFsFile * /*fs_file*/, TSK_OFF_T /*a_off*/, TSK_DADDR_T /*addr*/,
char *buf, size_t size, TSK_FS_BLOCK_FLAG_ENUM /*flags*/, void *ptr)
{
TSK_MD5_CTX *md = (TSK_MD5_CTX *) ptr;
if (md == NULL)
return TSK_WALK_CONT;
TSK_MD5_Update(md, (unsigned char *) buf, (unsigned int) size);
return TSK_WALK_CONT;
}
/**
* Process the contents of a file.
*
* @return 1 on error and 0 on success
*/
static uint8_t
procFile(TskFsFile * fs_file, const char *path)
{
TSK_MD5_CTX md;
if ((fs_file->getMeta() == NULL) || (fs_file->getName() == NULL))
return 1;
if (fs_file->getMeta()->getType() != TSK_FS_META_TYPE_REG)
return 0;
//printf("Processing %s%s\n", path, fs_file->name->name);
int myflags = TSK_FS_FILE_WALK_FLAG_NOID;
TSK_MD5_Init(&md);
/* Note that we could also cycle through all of the attributes in the
* file by using one of the tsk_fs_attr_get() functions and walking it
* with tsk_fs_attr_walk(). See the File Systems section of the Library
* User's Guide for more details:
* http://www.sleuthkit.org/sleuthkit/docs/api-docs/ */
if (fs_file->walk
((TSK_FS_FILE_WALK_FLAG_ENUM) myflags, fileAct,
(void *) &md)) {
// ignore errors from deleted files that were being recovered
if (tsk_error_get_errno() != TSK_ERR_FS_RECOVER) {
printf("Processing: %s/%s (%" PRIuINUM ")\n", path,
fs_file->getName()->getName(), fs_file->getMeta()->getAddr());
tsk_error_print(stderr);
}
tsk_error_reset();
}
// otherwise, compute the hash of the file.
else {
unsigned char hash[16];
TSK_MD5_Final(hash, &md);
#if 0
{
int i;
printf("Hash of %s/%s: ", path, fs_file->name->name);
for (i = 0; i < 16; i++) {
printf("%x%x", (hash[i] >> 4) & 0xf, hash[i] & 0xf);
}
printf("\n");
}
#endif
#if DO_HASHLOOKUP
// This code is not currently viable; TskHdbInfo implementation is incomplete.
{
int retval;
retval = tsk_hdb_lookup_raw(hdb_info, (uint8_t *) hash, 16,
TSK_HDB_FLAG_QUICK, NULL, NULL);
if (retval == 1) {
//printf("Ignoring file %s\n", fs_dent->name);
}
else if (retval == 0) {
// printf("Not Ignoring: %s/%s\n", path, name);
}
}
#endif
}
return 0;
}
/**
* file name walk callback. Walk the contents of each file
* that is found.
*/
static TSK_WALK_RET_ENUM
dirAct(TskFsFile * fs_file, const char *path, void * /*ptr*/)
{
fprintf(stdout,
"file systems file name: %s\n", fs_file->getName()->getName());
/* Ignore NTFS System files */
if ((TSK_FS_TYPE_ISNTFS(fs_file->getFsInfo()->getFsType()))
&& (fs_file->getName()->getName()[0] == '$'))
return TSK_WALK_CONT;
/* If the name has corresponding metadata, then walk it */
if (fs_file->getMeta()) {
procFile(fs_file, path);
}
return TSK_WALK_CONT;
}
/**
* Analyze the volume starting at byte offset 'start'
* and walk each file that can be found.
*
* @param img Disk image to be analyzed.
* @param start Byte offset of volume starting location.
*
* @return 1 on error and 0 on success
*/
static uint8_t
procFs(TskImgInfo * img_info, TSK_OFF_T start)
{
TskFsInfo *fs_info = new TskFsInfo();
/* Try it as a file system */
if (fs_info->open(img_info, start, TSK_FS_TYPE_DETECT))
{
delete fs_info;
tsk_error_print(stderr);
/* We could do some carving on the volume data at this point */
return 1;
}
/* Walk the files, starting at the root directory */
if (fs_info->dirWalk(fs_info->getRootINum(),
(TSK_FS_DIR_WALK_FLAG_ENUM) (TSK_FS_DIR_WALK_FLAG_RECURSE),
dirAct, NULL)) {
delete fs_info;
tsk_error_print(stderr);
fs_info->close();
return 1;
}
/* We could do some analysis of unallocated blocks at this point... */
fs_info->close();
delete fs_info;
return 0;
}
/**
* Volume system walk callback function that will analyze
* each volume to find a file system.
*/
static TSK_WALK_RET_ENUM
vsAct(TskVsInfo * vs_info, const TskVsPartInfo * vs_part, void * /*ptr*/)
{
if (procFs(const_cast<TskImgInfo *>(vs_info->getImgInfo()), const_cast<TskVsPartInfo *>(vs_part)->getStart() * vs_info->getBlockSize())) {
// if we return ERROR here, then the walk will stop. But, the
// error could just be because we looked into an unallocated volume.
// do any special error handling / reporting here.
tsk_error_reset();
return TSK_WALK_CONT;
}
return TSK_WALK_CONT;
}
/**
* Process the data as a volume system to find the partitions
* and volumes.
* File system analysis will be performed on each partition.
*
* @param img Image file information structure for data to analyze
* @param start Byte offset to start analyzing from.
*
* @return 1 on error and 0 on success
*/
static uint8_t
procVs(TskImgInfo * img_info, TSK_OFF_T start)
{
TskVsInfo *vs_info = new TskVsInfo();;
// USE mm_walk to get the volumes
if (vs_info->open(img_info, start, TSK_VS_TYPE_DETECT)) {
if (tsk_verbose)
fprintf(stderr,
"Error determining volume system -- trying file systems\n");
/* There was no volume system, but there could be a file system */
tsk_error_reset();
if (procFs(img_info, start)) {
delete vs_info;
return 1;
}
}
else {
fprintf(stderr, "Volume system open, examining each\n");
/* Walk the allocated volumes (skip metadata and unallocated volumes) */
if (vs_info->vsPartWalk(0, vs_info->getPartCount() - 1,
(TSK_VS_PART_FLAG_ENUM) (TSK_VS_PART_FLAG_ALLOC), vsAct,
NULL)) {
delete vs_info;
return 1;
}
}
delete vs_info;
return 0;
}
int
main(int argc, char **argv1)
{
TskImgInfo *img_info = new TskImgInfo();
TSK_TCHAR **argv;
#ifdef TSK_WIN32
// On Windows, get the wide arguments (mingw doesn't support wmain)
argv = CommandLineToArgvW(GetCommandLineW(), &argc);
if (argv == NULL) {
delete img_info;
fprintf(stderr, "Error getting wide arguments\n");
exit(1);
}
#else
argv = (TSK_TCHAR **) argv1;
#endif
if (argc != 2) {
delete img_info;
fprintf(stderr, "Missing image name\n");
exit(1);
}
#if DO_HASHLOOKUP
// This code is not currently viable; TskHdbInfo implementation is incomplete.
/* Setup hash infrastructure */
if ((hdb_info =
tsk_hdb_open(_TSK_T("/XXX/NSRLFile.txt"),
TSK_HDB_OPEN_NONE)) == NULL) {
delete img_info;
tsk_error_print(stderr);
exit(1);
}
if (tsk_hdb_idxsetup(hdb_info, TSK_HDB_HTYPE_MD5_ID) == 0) {
delete img_info;
fprintf(stderr,
"Hash database does not have an index (create one using hfind -i nsrl-md5 HASHFILE\n");
exit(1);
}
#else
hdb_info = NULL;
#endif
if (img_info->open(argv[1], TSK_IMG_TYPE_DETECT, 0) == 1) {
delete img_info;
fprintf(stderr, "Error opening file\n");
tsk_error_print(stderr);
exit(1);
}
if (procVs(img_info, 0)) {
delete img_info;
tsk_error_print(stderr);
exit(1);
}
delete img_info;
return 0;
}
|