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/*
** fls
** The Sleuth Kit
**
** Given an image and directory inode, display the file names and
** directories that exist (both active and deleted)
**
** Brian Carrier [carrier <at> sleuthkit [dot] org]
** Copyright (c) 2006-2011 Brian Carrier, Basis Technology. All Rights reserved
** Copyright (c) 2003-2005 Brian Carier. All rights reserved
**
** TASK
** Copyright (c) 2002 @stake Inc. All rights reserved
**
** TCTUTILs
** Copyright (c) 2001 Brian Carrier. All rights reserved
**
**
** This software is distributed under the Common Public License 1.0
**
*/
/** \file fls_lib.c
* Contains the library code associated with the TSK fls tool to list files in a directory.
*/
#include "tsk_fs_i.h"
/** \internal
* Structure to store data for callbacks.
*/
typedef struct {
/* Time skew of the system in seconds */
int32_t sec_skew;
/*directory prefix for printing mactime output */
char *macpre;
int flags;
} FLS_DATA;
/* this is a wrapper type function that takes care of the runtime
* flags
*
* fs_attr should be set to NULL for all non-NTFS file systems
*/
static void
printit(TSK_FS_FILE * fs_file, const char *a_path,
const TSK_FS_ATTR * fs_attr, const FLS_DATA * fls_data)
{
TSK_FS_HASH_RESULTS hash_results;
if ((!(fls_data->flags & TSK_FS_FLS_FULL)) && (a_path)) {
uint8_t printed = 0;
unsigned int i;
// lazy way to find out how many dirs there could be
for (i = 0; a_path[i] != '\0'; i++) {
if ((a_path[i] == '/') && (i != 0)) {
tsk_fprintf(stdout, "+");
printed = 1;
}
}
if (printed)
tsk_fprintf(stdout, " ");
}
if (fls_data->flags & TSK_FS_FLS_MAC) {
if (fls_data->flags & TSK_FS_FLS_HASH) {
if(0 == tsk_fs_file_hash_calc(fs_file, &hash_results,
TSK_BASE_HASH_MD5)){
tsk_fs_name_print_mac_md5(stdout, fs_file, a_path, fs_attr,
fls_data->macpre, fls_data->sec_skew,
hash_results.md5_digest);
tsk_printf("\n");
}
else {
unsigned char null_buf[16];
// If the hash calculation had errors, pass in a buffer of nulls
memset(null_buf, 0, 16);
tsk_fs_name_print_mac_md5(stdout, fs_file, a_path, fs_attr,
fls_data->macpre, fls_data->sec_skew,
null_buf);
tsk_printf("\n");
}
}
else {
tsk_fs_name_print_mac(stdout, fs_file, a_path,
fs_attr, fls_data->macpre, fls_data->sec_skew);
tsk_printf("\n");
}
}
else if (fls_data->flags & TSK_FS_FLS_LONG) {
tsk_fs_name_print_long(stdout, fs_file, a_path, fs_file->fs_info,
fs_attr, TSK_FS_FLS_FULL & fls_data->flags ? 1 : 0,
fls_data->sec_skew);
tsk_printf("\n");
}
else {
tsk_fs_name_print(stdout, fs_file, a_path, fs_file->fs_info,
fs_attr, TSK_FS_FLS_FULL & fls_data->flags ? 1 : 0);
tsk_printf("\n");
}
}
/*
* call back action function for dent_walk
*/
static TSK_WALK_RET_ENUM
print_dent_act(TSK_FS_FILE * fs_file, const char *a_path, void *ptr)
{
FLS_DATA *fls_data = (FLS_DATA *) ptr;
/* only print dirs if TSK_FS_FLS_DIR is set and only print everything
** else if TSK_FS_FLS_FILE is set (or we aren't sure what it is)
*/
if (((fls_data->flags & TSK_FS_FLS_DIR) &&
((fs_file->meta) &&
(TSK_FS_IS_DIR_META(fs_file->meta->type))))
|| ((fls_data->flags & TSK_FS_FLS_FILE) && (((fs_file->meta)
&& ( ! TSK_FS_IS_DIR_META(fs_file->meta->type)))
|| (!fs_file->meta)))) {
/* Make a special case for NTFS so we can identify all of the
* alternate data streams!
*/
if ((TSK_FS_TYPE_ISNTFS(fs_file->fs_info->ftype))
&& (fs_file->meta)) {
uint8_t printed = 0;
int i, cnt;
// cycle through the attributes
cnt = tsk_fs_file_attr_getsize(fs_file);
for (i = 0; i < cnt; i++) {
const TSK_FS_ATTR *fs_attr =
tsk_fs_file_attr_get_idx(fs_file, i);
if (!fs_attr)
continue;
if (fs_attr->type == TSK_FS_ATTR_TYPE_NTFS_DATA) {
printed = 1;
if (fs_file->meta->type == TSK_FS_META_TYPE_DIR) {
/* we don't want to print the ..:blah stream if
* the -a flag was not given
*/
if ((fs_file->name->name[0] == '.')
&& (fs_file->name->name[1])
&& (fs_file->name->name[2] == '\0')
&& ((fls_data->flags & TSK_FS_FLS_DOT) == 0)) {
continue;
}
}
printit(fs_file, a_path, fs_attr, fls_data);
}
else if (fs_attr->type == TSK_FS_ATTR_TYPE_NTFS_IDXROOT) {
printed = 1;
/* If it is . or .. only print it if the flags say so,
* we continue with other streams though in case the
* directory has a data stream
*/
if (!((TSK_FS_ISDOT(fs_file->name->name)) &&
((fls_data->flags & TSK_FS_FLS_DOT) == 0)))
printit(fs_file, a_path, fs_attr, fls_data);
}
/* Print the FILE_NAME times if this is the same attribute
* that we collected the times from. */
else if ((fs_attr->type == TSK_FS_ATTR_TYPE_NTFS_FNAME) &&
(fs_attr->id == fs_file->meta->time2.ntfs.fn_id) &&
(fls_data->flags & TSK_FS_FLS_MAC)) {
/* If it is . or .. only print it if the flags say so,
* we continue with other streams though in case the
* directory has a data stream
*/
if (!((TSK_FS_ISDOT(fs_file->name->name)) &&
((fls_data->flags & TSK_FS_FLS_DOT) == 0)))
printit(fs_file, a_path, fs_attr, fls_data);
}
}
/* A user reported that an allocated file had the standard
* attributes, but no $Data. We should print something */
if (printed == 0) {
printit(fs_file, a_path, NULL, fls_data);
}
}
else {
/* skip it if it is . or .. and we don't want them */
if (!((TSK_FS_ISDOT(fs_file->name->name))
&& ((fls_data->flags & TSK_FS_FLS_DOT) == 0)))
printit(fs_file, a_path, NULL, fls_data);
}
}
return TSK_WALK_CONT;
}
/* Returns 0 on success and 1 on error */
uint8_t
tsk_fs_fls(TSK_FS_INFO * fs, TSK_FS_FLS_FLAG_ENUM lclflags,
TSK_INUM_T inode, TSK_FS_DIR_WALK_FLAG_ENUM flags, TSK_TCHAR * tpre,
int32_t skew)
{
FLS_DATA data;
data.flags = lclflags;
data.sec_skew = skew;
#ifdef TSK_WIN32
{
UTF8 *ptr8;
UTF16 *ptr16;
int retval;
if ((tpre != NULL) && (TSTRLEN(tpre) > 0)) {
size_t clen = TSTRLEN(tpre) * 4;
data.macpre = (char *) tsk_malloc(clen);
if (data.macpre == NULL) {
return 1;
}
ptr8 = (UTF8 *) data.macpre;
ptr16 = (UTF16 *) tpre;
retval =
tsk_UTF16toUTF8_lclorder((const UTF16 **) &ptr16, (UTF16 *)
& ptr16[TSTRLEN(tpre) + 1], &ptr8,
(UTF8 *) ((uintptr_t) ptr8 + clen), TSKlenientConversion);
if (retval != TSKconversionOK) {
tsk_error_reset();
tsk_error_set_errno(TSK_ERR_FS_UNICODE);
tsk_error_set_errstr
("Error converting fls mactime pre-text to UTF-8 %d\n",
retval);
return 1;
}
}
else {
data.macpre = (char *) tsk_malloc(1);
if (data.macpre == NULL) {
return 1;
}
data.macpre[0] = '\0';
}
retval = tsk_fs_dir_walk(fs, inode, flags, print_dent_act, &data);
free(data.macpre);
data.macpre = NULL;
return retval;
}
#else
data.macpre = tpre;
return tsk_fs_dir_walk(fs, inode, flags, print_dent_act, &data);
#endif
}
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