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/*
** The Sleuth Kit
**
** Brian Carrier [carrier <at> sleuthkit [dot] org]
** Copyright (c) 2020 Brian Carrier. All Rights reserved
**
** This software is distributed under the Common Public License 1.0
**
*/
/**
* \file auto_db_java.cpp
* Contains code to populate database with volume and file system information from a specific image.
*/
#include "auto_db_java.h"
#include "jni.h"
#include "tsk/img/img_writer.h"
#if HAVE_LIBEWF
#include "tsk/img/ewf.h"
#include "tsk/img/tsk_img_i.h"
#endif
#include <string.h>
#include <algorithm>
#include <sstream>
using std::stringstream;
using std::for_each;
/**
*/
TskAutoDbJava::TskAutoDbJava()
{
m_curImgId = 0;
m_curVsId = 0;
m_curVolId = 0;
m_curFsId = 0;
m_curFileId = 0;
m_curUnallocDirId = 0;
m_curDirAddr = 0;
m_curDirPath = "";
m_vsFound = false;
m_volFound = false;
m_poolFound = false;
m_stopped = false;
m_foundStructure = false;
m_attributeAdded = false;
m_addFileSystems = true;
m_noFatFsOrphans = false;
m_addUnallocSpace = false;
m_minChunkSize = -1;
m_maxChunkSize = -1;
m_jniEnv = NULL;
tsk_init_lock(&m_curDirPathLock);
}
TskAutoDbJava::~TskAutoDbJava()
{
closeImage();
tsk_deinit_lock(&m_curDirPathLock);
}
/**
* Look up all callback method IDs
* @param jniEnv pointer to java environment this was called from
* @param jobj the TskCaseDbBridge object this was called from
*/
TSK_RETVAL_ENUM
TskAutoDbJava::initializeJni(JNIEnv * jniEnv, jobject jobj) {
m_jniEnv = jniEnv;
m_javaDbObj = m_jniEnv->NewGlobalRef(jobj);
jclass localCallbackClass = m_jniEnv->FindClass("org/sleuthkit/datamodel/TskCaseDbBridge");
if (localCallbackClass == NULL) {
return TSK_ERR;
}
m_callbackClass = (jclass)m_jniEnv->NewGlobalRef(localCallbackClass);
m_addImageMethodID = m_jniEnv->GetMethodID(m_callbackClass, "addImageInfo", "(IJLjava/lang/String;JLjava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;[Ljava/lang/String;)J");
if (m_addImageMethodID == NULL) {
return TSK_ERR;
}
m_addAcquisitionDetailsMethodID = m_jniEnv->GetMethodID(m_callbackClass, "addAcquisitionDetails", "(JLjava/lang/String;)V");
if (m_addAcquisitionDetailsMethodID == NULL) {
return TSK_ERR;
}
m_addVolumeSystemMethodID = m_jniEnv->GetMethodID(m_callbackClass, "addVsInfo", "(JIJJ)J");
if (m_addVolumeSystemMethodID == NULL) {
return TSK_ERR;
}
m_addVolumeMethodID = m_jniEnv->GetMethodID(m_callbackClass, "addVolume", "(JJJJLjava/lang/String;J)J");
if (m_addVolumeMethodID == NULL) {
return TSK_ERR;
}
m_addPoolMethodID = m_jniEnv->GetMethodID(m_callbackClass, "addPool", "(JI)J");
if (m_addPoolMethodID == NULL) {
return TSK_ERR;
}
m_addFileSystemMethodID = m_jniEnv->GetMethodID(m_callbackClass, "addFileSystem", "(JJIJJJJJ)J");
if (m_addFileSystemMethodID == NULL) {
return TSK_ERR;
}
m_addFileMethodID = m_jniEnv->GetMethodID(m_callbackClass, "addFile", "(JJJIIILjava/lang/String;JJIIIIJJJJJIIILjava/lang/String;Ljava/lang/String;JJJ)J");
if (m_addFileMethodID == NULL) {
return TSK_ERR;
}
m_addUnallocParentMethodID = m_jniEnv->GetMethodID(m_callbackClass, "addUnallocFsBlockFilesParent", "(JLjava/lang/String;)J");
if (m_addUnallocParentMethodID == NULL) {
return TSK_ERR;
}
m_addLayoutFileMethodID = m_jniEnv->GetMethodID(m_callbackClass, "addLayoutFile", "(JJJILjava/lang/String;J)J");
if (m_addLayoutFileMethodID == NULL) {
return TSK_ERR;
}
m_addLayoutFileRangeMethodID = m_jniEnv->GetMethodID(m_callbackClass, "addLayoutFileRange", "(JJJJ)J");
if (m_addLayoutFileRangeMethodID == NULL) {
return TSK_ERR;
}
return TSK_OK;
}
/**
* Cache a database object for later use. Should be called on image, volume system, volume,
* pool, and file system.
* @param objId The object ID of the new object
* @param parObjId The object ID of the new object's parent
* @param type The type of object
*/
void
TskAutoDbJava::saveObjectInfo(int64_t objId, int64_t parObjId, TSK_DB_OBJECT_TYPE_ENUM type) {
TSK_DB_OBJECT objectInfo;
objectInfo.objId = objId;
objectInfo.parObjId = parObjId;
objectInfo.type = type;
m_savedObjects.push_back(objectInfo);
}
/**
* Get a previously cached database object.
* @param objId The object ID of the object being loaded
*/
TSK_RETVAL_ENUM
TskAutoDbJava::getObjectInfo(int64_t objId, TSK_DB_OBJECT** obj_info) {
for (vector<TSK_DB_OBJECT>::iterator itObjs = m_savedObjects.begin();
itObjs != m_savedObjects.end(); ++itObjs) {
TSK_DB_OBJECT* tskDbObj = &(*itObjs);
if (tskDbObj->objId == objId) {
*obj_info = tskDbObj;
return TSK_OK;
}
}
// Object not found
return TSK_ERR;
}
/**
* Adds image details to the existing database tables. Object ID for new image stored in objId.
*
* @param type Image type
* @param ssize Size of device sector in bytes (or 0 for default)
* @param objId The object id assigned to the image (out param)
* @param timeZone The timezone the image is from
* @param size The size of the image in bytes.
* @param md5 MD5 hash of the image
* @param sha1 SHA1 hash of the image
* @param sha256 SHA256 hash of the image
* @param deviceId An ASCII-printable identifier for the device associated with the data source that is intended to be unique across multiple cases (e.g., a UUID).
* @param collectionDetails collection details
* @returns TSK_ERR on error, TSK_OK on success
*/
TSK_RETVAL_ENUM
TskAutoDbJava::addImageInfo(int type, TSK_OFF_T ssize, int64_t & objId, const string & timezone, TSK_OFF_T size, const string &md5,
const string& sha1, const string& sha256, const string& deviceId, const string& collectionDetails,
char** img_ptrs, int num_imgs) {
const char *tz_cstr = timezone.c_str();
jstring tzj = m_jniEnv->NewStringUTF(tz_cstr);
const char *md5_cstr = md5.c_str();
jstring md5j = m_jniEnv->NewStringUTF(md5_cstr);
const char *sha1_cstr = sha1.c_str();
jstring sha1j = m_jniEnv->NewStringUTF(sha1_cstr);
const char *sha256_cstr = sha256.c_str();
jstring sha256j = m_jniEnv->NewStringUTF(sha256_cstr);
const char *devId_cstr = deviceId.c_str();
jstring devIdj = m_jniEnv->NewStringUTF(devId_cstr);
const char *coll_cstr = collectionDetails.c_str();
jstring collj = m_jniEnv->NewStringUTF(coll_cstr);
jobjectArray imgNamesj = (jobjectArray)m_jniEnv->NewObjectArray(
num_imgs,
m_jniEnv->FindClass("java/lang/String"),
m_jniEnv->NewStringUTF(""));
for (int i = 0; i < num_imgs; i++) {
m_jniEnv->SetObjectArrayElement(
imgNamesj, i, m_jniEnv->NewStringUTF(img_ptrs[i]));
}
jlong objIdj = m_jniEnv->CallLongMethod(m_javaDbObj, m_addImageMethodID,
type, ssize, tzj, size, md5j, sha1j, sha256j, devIdj, collj, imgNamesj);
objId = (int64_t)objIdj;
if (objId < 0) {
return TSK_ERR;
}
saveObjectInfo(objId, 0, TSK_DB_OBJECT_TYPE_IMG);
return TSK_OK;
}
void
TskAutoDbJava::addAcquisitionDetails(int64_t imgId, const string& collectionDetails) {
const char *coll_cstr = collectionDetails.c_str();
jstring collj = m_jniEnv->NewStringUTF(coll_cstr);
m_jniEnv->CallLongMethod(m_javaDbObj, m_addAcquisitionDetailsMethodID,
imgId, collj);
}
/**
* Adds volume system to database. Object ID for new vs stored in objId.
*
* @param vs_info Struct containing info for this volume system
* @param parObjId Parent object ID for the volume system
* @param objId Object ID of new volume system
* @returns TSK_ERR on error, TSK_OK on success
*/
TSK_RETVAL_ENUM
TskAutoDbJava::addVsInfo(const TSK_VS_INFO* vs_info, int64_t parObjId, int64_t& objId) {
jlong objIdj = m_jniEnv->CallLongMethod(m_javaDbObj, m_addVolumeSystemMethodID,
parObjId, vs_info->vstype, vs_info->offset, (uint64_t)vs_info->block_size);
objId = (int64_t)objIdj;
if (objId < 0) {
return TSK_ERR;
}
// Save the vs info to use for unallocated blocks later
TSK_DB_VS_INFO vs_db;
vs_db.objId = objId;
vs_db.offset = vs_info->offset;
vs_db.vstype = vs_info->vstype;
vs_db.block_size = vs_info->block_size;
m_savedVsInfo.push_back(vs_db);
saveObjectInfo(objId, parObjId, TSK_DB_OBJECT_TYPE_VS);
return TSK_OK;
}
/**
* Adds pool and pool volume system to database. Object ID for new pool vs stored in objId.
*
* @param pool_info Struct containing info for this pool
* @param parObjId Parent object ID for the pool
* @param objId Object ID of new pool volume system
* @returns TSK_ERR on error, TSK_OK on success
*/
TSK_RETVAL_ENUM
TskAutoDbJava::addPoolInfoAndVS(const TSK_POOL_INFO *pool_info, int64_t parObjId, int64_t& objId) {
// Add the pool
jlong poolObjIdj = m_jniEnv->CallLongMethod(m_javaDbObj, m_addPoolMethodID,
parObjId, pool_info->ctype);
int64_t poolObjId = (int64_t)poolObjIdj;
if (poolObjId < 0) {
return TSK_ERR;
}
saveObjectInfo(poolObjId, parObjId, TSK_DB_OBJECT_TYPE_POOL);
// Add the pool volume
jlong objIdj = m_jniEnv->CallLongMethod(m_javaDbObj, m_addVolumeSystemMethodID,
poolObjIdj, TSK_VS_TYPE_APFS, pool_info->img_offset, (uint64_t)pool_info->block_size);
objId = (int64_t)objIdj;
saveObjectInfo(objId, poolObjId, TSK_DB_OBJECT_TYPE_VS);
return TSK_OK;
}
/**
* Adds a pool volume to database. Object ID for new pool volume stored in objId.
*
* @param pool_vol Struct containing info for this pool volume
* @param parObjId Parent object ID
* @param objId Object ID of new pool volume
* @returns TSK_ERR on error, TSK_OK on success
*/
TSK_RETVAL_ENUM
TskAutoDbJava::addPoolVolumeInfo(const TSK_POOL_VOLUME_INFO* pool_vol,
int64_t parObjId, int64_t& objId) {
jstring descj = m_jniEnv->NewStringUTF(pool_vol->desc);
jlong objIdj = m_jniEnv->CallLongMethod(m_javaDbObj, m_addVolumeMethodID,
parObjId, (int64_t)pool_vol->index, pool_vol->block, pool_vol->num_blocks,
descj, pool_vol->flags);
objId = (int64_t)objIdj;
if (objId < 0) {
return TSK_ERR;
}
saveObjectInfo(objId, parObjId, TSK_DB_OBJECT_TYPE_VOL);
return TSK_OK;
}
/**
* Adds a volume to database. Object ID for new volume stored in objId.
*
* @param vs_part Struct containing info for this volume
* @param parObjId Parent object ID
* @param objId Object ID of new volume
* @returns TSK_ERR on error, TSK_OK on success
*/
TSK_RETVAL_ENUM
TskAutoDbJava::addVolumeInfo(const TSK_VS_PART_INFO* vs_part,
int64_t parObjId, int64_t& objId) {
jstring descj = m_jniEnv->NewStringUTF(vs_part->desc);
jlong objIdj = m_jniEnv->CallLongMethod(m_javaDbObj, m_addVolumeMethodID,
parObjId, (uint64_t)vs_part->addr, vs_part->start, vs_part->len,
descj, vs_part->flags);
objId = (int64_t)objIdj;
if (objId < 0) {
return TSK_ERR;
}
// Save the volume info for creating unallocated blocks later
TSK_DB_VS_PART_INFO vs_part_db;
vs_part_db.objId = objId;
vs_part_db.addr = vs_part->addr;
vs_part_db.start = vs_part->start;
vs_part_db.len = vs_part->len;
strncpy(vs_part_db.desc, vs_part->desc, TSK_MAX_DB_VS_PART_INFO_DESC_LEN - 1);
vs_part_db.flags = vs_part->flags;
m_savedVsPartInfo.push_back(vs_part_db);
saveObjectInfo(objId, parObjId, TSK_DB_OBJECT_TYPE_VOL);
return TSK_OK;
}
/**
* Adds a file system to database. Object ID for new file system stored in objId.
*
* @param fs_info Struct containing info for this file system
* @param parObjId Parent object ID
* @param objId Object ID of new file system
* @returns TSK_ERR on error, TSK_OK on success
*/
TSK_RETVAL_ENUM
TskAutoDbJava::addFsInfo(const TSK_FS_INFO* fs_info, int64_t parObjId,
int64_t& objId) {
jlong objIdj = m_jniEnv->CallLongMethod(m_javaDbObj, m_addFileSystemMethodID,
parObjId, fs_info->offset, (int)fs_info->ftype, (uint64_t)fs_info->block_size,
fs_info->block_count, fs_info->root_inum, fs_info->first_inum,
fs_info->last_inum);
objId = (int64_t)objIdj;
if (objId < 0) {
return TSK_ERR;
}
// Save the file system info for creating unallocated blocks later
TSK_DB_FS_INFO fs_info_db;
fs_info_db.objId = objId;
fs_info_db.imgOffset = fs_info->offset;
fs_info_db.fType = fs_info->ftype;
fs_info_db.block_size = fs_info->block_size;
fs_info_db.block_count = fs_info->block_count;
fs_info_db.root_inum = fs_info->root_inum;
fs_info_db.first_inum = fs_info->first_inum;
fs_info_db.last_inum = fs_info->last_inum;
m_savedFsInfo.push_back(fs_info_db);
saveObjectInfo(objId, parObjId, TSK_DB_OBJECT_TYPE_FS);
return TSK_OK;
}
/**
* Adds a file to database. Object ID for new file stored in objId.
*
* @param fs_file
* @param fs_attr
* @param path File path
* @param parObjId Parent object ID
* @param fsObjId Object ID of the file system
* @param objId Object ID of new file
* @param dataSourceObjId Object ID of the data source
* @returns TSK_ERR on error, TSK_OK on success
*/
TSK_RETVAL_ENUM
TskAutoDbJava::addFsFile(TSK_FS_FILE* fs_file,
const TSK_FS_ATTR* fs_attr, const char* path,
int64_t fsObjId, int64_t& objId, int64_t dataSourceObjId) {
if (fs_file->name == NULL)
return TSK_ERR;
// The object id for the parent folder. Will stay as zero if not the root folder
int64_t parObjId = 0;
// Root directory's parent should be the file system object.
// Make sure it doesn't have a name, so that we don't pick up ".." entries
if ((fs_file->fs_info->root_inum == fs_file->name->meta_addr) &&
((fs_file->name->name == NULL) || (strlen(fs_file->name->name) == 0))) {
// File is in the root directory
parObjId = fsObjId;
}
// Add the file to the database
return addFile(fs_file, fs_attr, path, fsObjId, parObjId, dataSourceObjId);
}
/**
* Extract the extension from the given file name and store it in the supplied string.
* @param name A file name
* @param extension The file name extension will be extracted to extension.
*/
void extractExtension(char *name, char *extension) {
char *ext = strrchr(name, '.');
//if ext is not null and is not the entire filename...
if (ext && (name != ext)) {
size_t extLen = strlen(ext);
//... and doesn't only contain the '.' and isn't too long to be a real extension.
if ((1 < extLen) && (extLen < 15)) {
strncpy(extension, ext + 1, extLen - 1);
//normalize to lower case, only works for ascii
for (int i = 0; extension[i]; i++) {
extension[i] = tolower(extension[i]);
}
}
}
}
/**
* Convert a sequence of characters to a jstring object.
* We first convert the character sequence to UTF16 and then
* use the JNI NewString() method to create the jstring.
* We do it this way because we encountered data that contained
* 4 byte (or more) UTF8 encoded characters and the JNI NewStringUTF()
* method does not handle 4 byte UTF8 encoding.
*
* @param input The sequence of characters to be turned into a jstring.
* @param newJString The new jstring object created from the input.
* @returns TSK_ERR on error, TSK_OK on success
*/
TSK_RETVAL_ENUM TskAutoDbJava::createJString(const char * input, jstring & newJString) {
size_t input_len = strlen(input) + 1;
UTF16 * utf16_input;
if ((utf16_input = (UTF16 *)tsk_malloc(input_len * sizeof(UTF16))) == NULL) {
return TSK_ERR;
}
UTF8 * source = (UTF8 *)input;
UTF16 * target = utf16_input;
if (tsk_UTF8toUTF16((const UTF8 **)&source, (const UTF8 *)&source[input_len], &target, &target[input_len], TSKlenientConversion) != TSKconversionOK) {
free(utf16_input);
return TSK_ERR;
}
/*
* To determine the length of the new string we we subtract the address
* of the start of the UTF16 buffer from the address at the end of the
* UTF16 buffer (target is advanced in the call to the conversion routine
* above).
*/
newJString = m_jniEnv->NewString(utf16_input, (target - utf16_input) - 1);
free(utf16_input);
return TSK_OK;
}
/**
* Adds a file and its associated slack file to database.
* Does not learn object ID for new files, and files may
* not be added to the database immediately.
*
* @param fs_file
* @param fs_attr
* @param path File path
* @param fsObjId Object ID of the file system
* @param parObjId Parent object ID if known, 0 otherwise
* @param dataSourceObjId Object ID of the data source
* @returns TSK_ERR on error, TSK_OK on success
*/
TSK_RETVAL_ENUM
TskAutoDbJava::addFile(TSK_FS_FILE* fs_file,
const TSK_FS_ATTR* fs_attr, const char* path,
int64_t fsObjId, int64_t parObjId,
int64_t dataSourceObjId)
{
time_t mtime = 0;
time_t crtime = 0;
time_t ctime = 0;
time_t atime = 0;
TSK_OFF_T size = 0;
int meta_type = 0;
int meta_flags = 0;
int meta_mode = 0;
int meta_seq = 0;
int gid = 0;
int uid = 0;
int type = TSK_FS_ATTR_TYPE_NOT_FOUND;
int idx = 0;
if (fs_file->name == NULL)
return TSK_OK;
if (fs_file->meta) {
mtime = fs_file->meta->mtime;
atime = fs_file->meta->atime;
ctime = fs_file->meta->ctime;
crtime = fs_file->meta->crtime;
meta_type = fs_file->meta->type;
meta_flags = fs_file->meta->flags;
meta_mode = fs_file->meta->mode;
gid = fs_file->meta->gid;
uid = fs_file->meta->uid;
meta_seq = fs_file->meta->seq;
}
size_t attr_nlen = 0;
if (fs_attr) {
type = fs_attr->type;
idx = fs_attr->id;
size = fs_attr->size;
if (fs_attr->name) {
if ((fs_attr->type != TSK_FS_ATTR_TYPE_NTFS_IDXROOT) ||
(strcmp(fs_attr->name, "$I30") != 0)) {
attr_nlen = strlen(fs_attr->name);
}
}
}
// sanity check
if (size < 0) {
size = 0;
}
// combine name and attribute name
size_t len = strlen(fs_file->name->name);
char * name;
size_t nlen = len + attr_nlen + 11; // Extra space for possible colon and '-slack'
if ((name = (char *)tsk_malloc(nlen)) == NULL) {
return TSK_ERR;
}
strncpy(name, fs_file->name->name, nlen);
char extension[24] = "";
extractExtension(name, extension);
// Add the attribute name
if (attr_nlen > 0) {
strncat(name, ":", nlen - strlen(name));
if (fs_attr != NULL) {
strncat(name, fs_attr->name, nlen - strlen(name));
}
}
jstring namej;
if (createJString(name, namej) != TSK_OK) {
free(name);
return TSK_ERR;
}
// clean up path
// +2 = space for leading slash and terminating null
size_t path_len = strlen(path) + 2;
char* escaped_path;
if ((escaped_path = (char *)tsk_malloc(path_len)) == NULL) {
free(name);
return TSK_ERR;
}
strncpy(escaped_path, "/", path_len);
strncat(escaped_path, path, path_len - strlen(escaped_path));
jstring pathj;
if (createJString(escaped_path, pathj) != TSK_OK) {
free(name);
free(escaped_path);
return TSK_ERR;
}
// Escaped path is not needed beyond this point so free it.
free(escaped_path);
jstring extj;
if (createJString(extension, extj) != TSK_OK) {
free(name);
return TSK_ERR;
}
/* NTFS uses sequence, otherwise we hash the path. We do this to map to the
* correct parent folder if there are two from the root dir that eventually point to
* the same folder (one deleted and one allocated) or two hard links. */
jlong par_seqj;
if (TSK_FS_TYPE_ISNTFS(fs_file->fs_info->ftype))
{
par_seqj = fs_file->name->par_seq;
}
else {
par_seqj = -1;
}
TSK_INUM_T par_meta_addr = fs_file->name->par_addr;
// Add the file to the database
jlong ret_val = m_jniEnv->CallLongMethod(m_javaDbObj, m_addFileMethodID,
parObjId, fsObjId,
dataSourceObjId,
TSK_DB_FILES_TYPE_FS,
type, idx, namej,
fs_file->name->meta_addr, (uint64_t)fs_file->name->meta_seq,
fs_file->name->type, meta_type, fs_file->name->flags, meta_flags,
size,
(unsigned long long)crtime, (unsigned long long)ctime, (unsigned long long) atime, (unsigned long long) mtime,
meta_mode, gid, uid,
pathj, extj,
(uint64_t)meta_seq, par_meta_addr, par_seqj);
if (ret_val < 0) {
free(name);
return TSK_ERR;
}
// Add entry for the slack space.
// Current conditions for creating a slack file:
// - File name is not empty, "." or ".."
// - Data is non-resident
// - The allocated size is greater than the initialized file size
// See github issue #756 on why initsize and not size.
// - The data is not compressed
if ((fs_attr != NULL)
&& ((strlen(name) > 0) && (!TSK_FS_ISDOT(name)))
&& (!(fs_file->meta->flags & TSK_FS_META_FLAG_COMP))
&& (fs_attr->flags & TSK_FS_ATTR_NONRES)
&& (fs_attr->nrd.allocsize > fs_attr->nrd.initsize)) {
strncat(name, "-slack", 6);
if (strlen(extension) > 0) {
strncat(extension, "-slack", 6);
}
jstring slackNamej;
if (createJString(name, slackNamej) != TSK_OK) {
free(name);
return TSK_ERR;
}
jstring slackExtj;
if (createJString(extension, slackExtj) != TSK_OK) {
free(name);
return TSK_ERR;
}
TSK_OFF_T slackSize = fs_attr->nrd.allocsize - fs_attr->nrd.initsize;
// Add slack file to database
jlong ret_val = m_jniEnv->CallLongMethod(m_javaDbObj, m_addFileMethodID,
parObjId, fsObjId,
dataSourceObjId,
TSK_DB_FILES_TYPE_SLACK,
type, idx, slackNamej,
fs_file->name->meta_addr, (uint64_t)fs_file->name->meta_seq,
TSK_FS_NAME_TYPE_REG, TSK_FS_META_TYPE_REG, fs_file->name->flags, meta_flags,
slackSize,
(unsigned long long)crtime, (unsigned long long)ctime, (unsigned long long) atime, (unsigned long long) mtime,
meta_mode, gid, uid, // md5TextPtr, known,
pathj, slackExtj,
(uint64_t)meta_seq, par_meta_addr, par_seqj);
if (ret_val < 0) {
free(name);
return TSK_ERR;
}
}
free(name);
return TSK_OK;
}
// Internal function object to check for range overlap
typedef struct _checkFileLayoutRangeOverlap {
const vector<TSK_DB_FILE_LAYOUT_RANGE> & ranges;
bool hasOverlap;
explicit _checkFileLayoutRangeOverlap(const vector<TSK_DB_FILE_LAYOUT_RANGE> & ranges)
: ranges(ranges), hasOverlap(false) {}
bool getHasOverlap() const { return hasOverlap; }
void operator() (const TSK_DB_FILE_LAYOUT_RANGE & range) {
if (hasOverlap)
return; //no need to check other
uint64_t start = range.byteStart;
uint64_t end = start + range.byteLen;
vector<TSK_DB_FILE_LAYOUT_RANGE>::const_iterator it;
for (it = ranges.begin(); it != ranges.end(); ++it) {
const TSK_DB_FILE_LAYOUT_RANGE * otherRange = &(*it);
if (&range == otherRange)
continue; //skip, it's the same range
uint64_t otherStart = otherRange->byteStart;
uint64_t otherEnd = otherStart + otherRange->byteLen;
if (start <= otherEnd && end >= otherStart) {
hasOverlap = true;
break;
}
}
}
} checkFileLayoutRangeOverlap;
/**
* Internal helper method to add unalloc, unused and carved files with layout ranges to db
* Generates file_name and populates tsk_files, tsk_objects and tsk_file_layout tables
* Adds a single entry to tsk_files table with an auto-generated file name, tsk_objects table, and one or more entries to tsk_file_layout table
* @param dbFileType Type of file
* @param parentObjId Id of the parent object in the database (fs, volume, or image)
* @param fsObjId parent fs, or NULL if the file is not associated with fs
* @param size Number of bytes in file
* @param ranges vector containing one or more TSK_DB_FILE_LAYOUT_RANGE layout ranges (in)
* @param objId object id of the file object created (output)
* @param dataSourceObjId The object ID for the data source
* @returns TSK_OK on success or TSK_ERR on error.
*/
TSK_RETVAL_ENUM
TskAutoDbJava::addFileWithLayoutRange(const TSK_DB_FILES_TYPE_ENUM dbFileType, const int64_t parentObjId,
const int64_t fsObjId, const uint64_t size,
vector<TSK_DB_FILE_LAYOUT_RANGE>& ranges, int64_t& objId,
int64_t dataSourceObjId) {
const size_t numRanges = ranges.size();
if (numRanges < 1) {
tsk_error_reset();
tsk_error_set_errno(TSK_ERR_AUTO_DB);
tsk_error_set_errstr("Error addFileWithLayoutRange() - no ranges present");
return TSK_ERR;
}
stringstream fileNameSs;
switch (dbFileType) {
case TSK_DB_FILES_TYPE_UNALLOC_BLOCKS:
fileNameSs << "Unalloc";
break;
case TSK_DB_FILES_TYPE_UNUSED_BLOCKS:
fileNameSs << "Unused";
break;
case TSK_DB_FILES_TYPE_CARVED:
fileNameSs << "Carved";
break;
default:
stringstream sserr;
tsk_error_reset();
tsk_error_set_errno(TSK_ERR_AUTO_DB);
sserr << "Error addFileWithLayoutRange() - unsupported file type for file layout range: ";
sserr << (int)dbFileType;
tsk_error_set_errstr("%s", sserr.str().c_str());
return TSK_ERR;
}
//ensure layout ranges are sorted (to generate file name and to be inserted in sequence order)
sort(ranges.begin(), ranges.end());
//dome some checking
//ensure there is no overlap and each range has unique byte range
const checkFileLayoutRangeOverlap & overlapRes =
for_each(ranges.begin(), ranges.end(), checkFileLayoutRangeOverlap(ranges));
if (overlapRes.getHasOverlap()) {
tsk_error_reset();
tsk_error_set_errno(TSK_ERR_AUTO_DB);
tsk_error_set_errstr("Error addFileWithLayoutRange() - overlap detected between ranges");
return TSK_ERR;
}
//construct filename with parent obj id, start byte of first range, end byte of last range
fileNameSs << "_" << parentObjId << "_" << ranges[0].byteStart;
fileNameSs << "_" << (ranges[numRanges - 1].byteStart + ranges[numRanges - 1].byteLen);
jstring namej = m_jniEnv->NewStringUTF(fileNameSs.str().c_str());
// Insert into tsk files and tsk objects
jlong objIdj = m_jniEnv->CallLongMethod(m_javaDbObj, m_addLayoutFileMethodID,
parentObjId, fsObjId, dataSourceObjId, dbFileType, namej, size);
objId = (int64_t)objIdj;
if (objId < 0) {
return TSK_ERR;
}
// Fill in fileObjId and insert ranges
for (vector<TSK_DB_FILE_LAYOUT_RANGE>::iterator it = ranges.begin();
it != ranges.end(); ++it) {
TSK_DB_FILE_LAYOUT_RANGE & range = *it;
range.fileObjId = objId;
if (-1 == m_jniEnv->CallLongMethod(m_javaDbObj, m_addLayoutFileRangeMethodID,
objId, range.byteStart, range.byteLen, (uint64_t)range.sequence)) {
return TSK_ERR;
}
}
return TSK_OK;
}
/**
* Adds information about a unallocated file with layout ranges into the database.
* Adds a single entry to tsk_files table with an auto-generated file name, tsk_objects table, and one or more entries to tsk_file_layout table
* @param parentObjId Id of the parent object in the database (fs, volume, or image)
* @param fsObjId parent fs, or NULL if the file is not associated with fs
* @param size Number of bytes in file
* @param ranges vector containing one or more TSK_DB_FILE_LAYOUT_RANGE layout ranges (in)
* @param objId object id of the file object created (output)
* @param dataSourceObjId The object ID for the data source
* @returns TSK_OK on success or TSK_ERR on error.
*/
TSK_RETVAL_ENUM
TskAutoDbJava::addUnallocBlockFile(const int64_t parentObjId, const int64_t fsObjId, const uint64_t size,
vector<TSK_DB_FILE_LAYOUT_RANGE>& ranges, int64_t& objId,
int64_t dataSourceObjId) {
return addFileWithLayoutRange(TSK_DB_FILES_TYPE_UNALLOC_BLOCKS, parentObjId, fsObjId, size, ranges, objId,
dataSourceObjId);
}
/**
* Adds information about a unused file with layout ranges into the database.
* Adds a single entry to tsk_files table with an auto-generated file name, tsk_objects table, and one or more entries to tsk_file_layout table
* @param parentObjId Id of the parent object in the database (fs, volume, or image)
* @param fsObjId parent fs, or NULL if the file is not associated with fs
* @param size Number of bytes in file
* @param ranges vector containing one or more TSK_DB_FILE_LAYOUT_RANGE layout ranges (in)
* @param objId object id of the file object created (output)
* @param dataSourceObjId The object ID for the data source
* @returns TSK_OK on success or TSK_ERR on error.
*/
TSK_RETVAL_ENUM
TskAutoDbJava::addUnusedBlockFile(const int64_t parentObjId, const int64_t fsObjId, const uint64_t size,
vector<TSK_DB_FILE_LAYOUT_RANGE>& ranges, int64_t& objId,
int64_t dataSourceObjId) {
return addFileWithLayoutRange(TSK_DB_FILES_TYPE_UNUSED_BLOCKS, parentObjId, fsObjId, size, ranges, objId,
dataSourceObjId);
}
/**
* Add a virtual dir to hold unallocated block files for this file system.
* @param fsObjId Object ID of the file system
* @param objId Object ID of the created virtual dir
* @param dataSourceObjId Object ID of the data source
*/
TSK_RETVAL_ENUM
TskAutoDbJava::addUnallocFsBlockFilesParent(const int64_t fsObjId, int64_t& objId,
int64_t dataSourceObjId) {
const char * const unallocDirName = "$Unalloc";
jstring namej = m_jniEnv->NewStringUTF(unallocDirName);
jlong objIdj = m_jniEnv->CallLongMethod(m_javaDbObj, m_addUnallocParentMethodID,
fsObjId, namej);
objId = (int64_t)objIdj;
if (objId < 0) {
return TSK_ERR;
}
return TSK_OK;
}
/**
* Adds a new volume that will hold the unallocated blocks for the pool.
*
* @param vol_index The index for the new volume (should be one higher than the number of pool volumes)
* @param parObjId The object ID of the parent volume system
* @param objId Will be set to the object ID of the new volume
*
* @returns TSK_ERR on error, TSK_OK on success
*/
TSK_RETVAL_ENUM
TskAutoDbJava::addUnallocatedPoolVolume(int vol_index, int64_t parObjId, int64_t& objId)
{
const char *desc = "Unallocated Blocks";
jstring descj = m_jniEnv->NewStringUTF(desc);
jlong objIdj = m_jniEnv->CallLongMethod(m_javaDbObj, m_addVolumeMethodID,
parObjId, vol_index, 0, 0,
descj, 0);
objId = (int64_t)objIdj;
if (objId < 0) {
return TSK_ERR;
}
return TSK_OK;
}
void TskAutoDbJava::close() {
if (m_jniEnv == NULL) {
return;
}
if (m_javaDbObj != NULL) {
m_jniEnv->DeleteGlobalRef(m_javaDbObj);
}
if (m_callbackClass != NULL) {
m_jniEnv->DeleteGlobalRef(m_callbackClass);
}
}
int64_t TskAutoDbJava::getImageID() {
return m_curImgId;
}
void TskAutoDbJava::closeImage() {
TskAuto::closeImage();
}
void TskAutoDbJava::setAddFileSystems(bool addFileSystems) {
m_addFileSystems = addFileSystems;
}
void TskAutoDbJava::setNoFatFsOrphans(bool noFatFsOrphans) {
m_noFatFsOrphans = noFatFsOrphans;
}
void TskAutoDbJava::setAddUnallocSpace(bool addUnallocSpace) {
setAddUnallocSpace(addUnallocSpace, -1);
}
void TskAutoDbJava::setAddUnallocSpace(bool addUnallocSpace, int64_t minChunkSize) {
m_addUnallocSpace = addUnallocSpace;
m_minChunkSize = minChunkSize;
m_maxChunkSize = -1;
}
void TskAutoDbJava::setAddUnallocSpace(int64_t minChunkSize, int64_t maxChunkSize) {
m_addUnallocSpace = true;
m_minChunkSize = minChunkSize;
m_maxChunkSize = maxChunkSize;
}
/**
* Adds an image to the database.
*
* @param a_num Number of image parts
* @param a_images Array of paths to the image parts
* @param a_type Image type
* @param a_ssize Size of device sector in bytes (or 0 for default)
* @param a_deviceId An ASCII-printable identifier for the device associated with the data source that is intended to be unique across multiple cases (e.g., a UUID).
* @return 0 for success, 1 for failure
*/
uint8_t
TskAutoDbJava::openImageUtf8(int a_num, const char *const a_images[],
TSK_IMG_TYPE_ENUM a_type, unsigned int a_ssize, const char* a_deviceId)
{
uint8_t retval =
TskAuto::openImageUtf8(a_num, a_images, a_type, a_ssize);
if (retval != 0) {
return retval;
}
if (addImageDetails(a_deviceId)) {
return 1;
}
return 0;
}
/**
* Adds an image to the database.
*
* @param a_num Number of image parts
* @param a_images Array of paths to the image parts
* @param a_type Image type
* @param a_ssize Size of device sector in bytes (or 0 for default)
* @param a_deviceId An ASCII-printable identifier for the device associated with the data source that is intended to be unique across multiple cases (e.g., a UUID).
* @return 0 for success, 1 for failure
*/
uint8_t
TskAutoDbJava::openImage(int a_num, const TSK_TCHAR * const a_images[],
TSK_IMG_TYPE_ENUM a_type, unsigned int a_ssize, const char* a_deviceId)
{
#ifdef TSK_WIN32
uint8_t retval = TskAuto::openImage(a_num, a_images, a_type, a_ssize);
if (retval != 0) {
return retval;
}
return (addImageDetails(a_deviceId));
#else
return openImageUtf8(a_num, a_images, a_type, a_ssize, a_deviceId);
#endif
}
/**
* Adds an image to the database. Requires that m_img_info is already initialized
*
* @param a_deviceId An ASCII-printable identifier for the device associated with the data source that is intended to be unique across multiple cases (e.g., a UUID).
* @return 0 for success, 1 for failure
*/
uint8_t
TskAutoDbJava::openImage(const char* a_deviceId)
{
if (m_img_info == NULL) {
return 1;
}
return(addImageDetails(a_deviceId));
}
/**
* Adds image details to the existing database tables.
*
* @param deviceId An ASCII-printable identifier for the device associated with the data source that is intended to be unique across multiple cases (e.g., a UUID).
* @return Returns 0 for success, 1 for failure
*/
uint8_t
TskAutoDbJava::addImageDetails(const char* deviceId)
{
string md5 = "";
string sha1 = "";
string collectionDetails = "";
#if HAVE_LIBEWF
if (m_img_info->itype == TSK_IMG_TYPE_EWF_EWF) {
// @@@ This should really probably be inside of a tsk_img_ method
IMG_EWF_INFO *ewf_info = (IMG_EWF_INFO *)m_img_info;
if (ewf_info->md5hash_isset) {
md5 = ewf_info->md5hash;
}
if (ewf_info->sha1hash_isset) {
sha1 = ewf_info->sha1hash;
}
collectionDetails = ewf_get_details(ewf_info);
}
#endif
// If the image has already been added to the database, update the acquisition details and return.
if (m_curImgId > 0) {
addAcquisitionDetails(m_curImgId, collectionDetails);
return 0;
}
string devId;
if (NULL != deviceId) {
devId = deviceId;
} else {
devId = "";
}
char **img_ptrs;
#ifdef TSK_WIN32
// convert image paths to UTF-8
img_ptrs = (char **)tsk_malloc(m_img_info->num_img * sizeof(char *));
if (img_ptrs == NULL) {
return 1;
}
for (int i = 0; i < m_img_info->num_img; i++) {
char * img2 = (char*)tsk_malloc(1024 * sizeof(char));
UTF8 *ptr8;
UTF16 *ptr16;
ptr8 = (UTF8 *)img2;
ptr16 = (UTF16 *)m_img_info->images[i];
uint8_t retval =
tsk_UTF16toUTF8_lclorder((const UTF16 **)&ptr16, (UTF16 *)
& ptr16[TSTRLEN(m_img_info->images[i]) + 1], &ptr8,
(UTF8 *)((uintptr_t)ptr8 + 1024), TSKlenientConversion);
if (retval != TSKconversionOK) {
tsk_error_reset();
tsk_error_set_errno(TSK_ERR_AUTO_UNICODE);
tsk_error_set_errstr("Error converting image to UTF-8\n");
return 1;
}
img_ptrs[i] = img2;
}
#else
img_ptrs = m_img_info->images;
#endif
if (TSK_OK != addImageInfo(m_img_info->itype, m_img_info->sector_size,
m_curImgId, m_curImgTZone, m_img_info->size, md5, sha1, "", devId, collectionDetails,
img_ptrs, m_img_info->num_img)) {
registerError();
return 1;
}
#ifdef TSK_WIN32
//cleanup
for (int i = 0; i < m_img_info->num_img; ++i) {
free(img_ptrs[i]);
}
free(img_ptrs);
#endif
return 0;
}
TSK_FILTER_ENUM
TskAutoDbJava::filterVs(const TSK_VS_INFO * vs_info)
{
m_vsFound = true;
if (TSK_OK != addVsInfo(vs_info, m_curImgId, m_curVsId)) {
registerError();
return TSK_FILTER_STOP;
}
return TSK_FILTER_CONT;
}
TSK_FILTER_ENUM
TskAutoDbJava::filterPool(const TSK_POOL_INFO * pool_info)
{
m_poolFound = true;
if (m_volFound && m_vsFound) {
// there's a volume system and volume
if (TSK_OK != addPoolInfoAndVS(pool_info, m_curVolId, m_curPoolVs)) {
registerError();
return TSK_FILTER_STOP;
}
// Save the parent obj ID for the pool
m_poolOffsetToParentId[pool_info->img_offset] = m_curVolId;
}
else {
// pool doesn't live in a volume, use image as parent
if (TSK_OK != addPoolInfoAndVS(pool_info, m_curImgId, m_curPoolVs)) {
registerError();
return TSK_FILTER_STOP;
}
// Save the parent obj ID for the pool
m_poolOffsetToParentId[pool_info->img_offset] = m_curImgId;
}
// Store the volume system object ID for later use
m_poolOffsetToVsId[pool_info->img_offset] = m_curPoolVs;
return TSK_FILTER_CONT;
}
/**
* Adds unallocated pool blocks to a new volume.
*
* @param numPool Will be updated with the number of pools processed
*
* @return Returns 0 for success, 1 for failure
*/
TSK_RETVAL_ENUM
TskAutoDbJava::addUnallocatedPoolBlocksToDb(size_t & numPool) {
for (size_t i = 0; i < m_poolInfos.size(); i++) {
const TSK_POOL_INFO * pool_info = m_poolInfos[i];
if (m_poolOffsetToVsId.find(pool_info->img_offset) == m_poolOffsetToVsId.end()) {
tsk_error_reset();
tsk_error_set_errno(TSK_ERR_AUTO_DB);
tsk_error_set_errstr("Error addUnallocatedPoolBlocksToDb() - could not find volume system object ID for pool at offset %lld", pool_info->img_offset);
return TSK_ERR;
}
int64_t curPoolVs = m_poolOffsetToVsId[pool_info->img_offset];
/* Make sure the pool_info is still allocated */
if (pool_info->tag != TSK_POOL_INFO_TAG) {
tsk_error_reset();
tsk_error_set_errno(TSK_ERR_AUTO_DB);
tsk_error_set_errstr("Error addUnallocatedPoolBlocksToDb() - pool_info is not allocated");
return TSK_ERR;
}
/* Only APFS pools are currently supported */
if (pool_info->ctype != TSK_POOL_TYPE_APFS) {
continue;
}
/* Increment the count of pools found */
numPool++;
/* Create the volume */
int64_t unallocVolObjId;
if (TSK_ERR == addUnallocatedPoolVolume(pool_info->num_vols, curPoolVs, unallocVolObjId)) {
tsk_error_reset();
tsk_error_set_errno(TSK_ERR_AUTO_DB);
tsk_error_set_errstr("Error addUnallocatedPoolBlocksToDb() - error createing unallocated space pool volume");
return TSK_ERR;
}
/* Create the unallocated space files */
TSK_FS_ATTR_RUN * unalloc_runs = tsk_pool_unallocated_runs(pool_info);
TSK_FS_ATTR_RUN * current_run = unalloc_runs;
vector<TSK_DB_FILE_LAYOUT_RANGE> ranges;
while (current_run != NULL) {
TSK_DB_FILE_LAYOUT_RANGE tempRange(current_run->addr * pool_info->block_size, current_run->len * pool_info->block_size, 0);
ranges.push_back(tempRange);
int64_t fileObjId = 0;
if (TSK_ERR == addUnallocBlockFile(unallocVolObjId, 0, current_run->len * pool_info->block_size, ranges, fileObjId, m_curImgId)) {
registerError();
tsk_fs_attr_run_free(unalloc_runs);
return TSK_ERR;
}
current_run = current_run->next;
ranges.clear();
}
tsk_fs_attr_run_free(unalloc_runs);
}
return TSK_OK;
}
TSK_FILTER_ENUM
TskAutoDbJava::filterPoolVol(const TSK_POOL_VOLUME_INFO * pool_vol)
{
if (TSK_OK != addPoolVolumeInfo(pool_vol, m_curPoolVs, m_curPoolVol)) {
registerError();
return TSK_FILTER_STOP;
}
return TSK_FILTER_CONT;
}
TSK_FILTER_ENUM
TskAutoDbJava::filterVol(const TSK_VS_PART_INFO * vs_part)
{
m_volFound = true;
m_foundStructure = true;
m_poolFound = false;
if (TSK_OK != addVolumeInfo(vs_part, m_curVsId, m_curVolId)) {
registerError();
return TSK_FILTER_STOP;
}
return TSK_FILTER_CONT;
}
TSK_FILTER_ENUM
TskAutoDbJava::filterFs(TSK_FS_INFO * fs_info)
{
TSK_FS_FILE *file_root;
m_foundStructure = true;
if (m_poolFound) {
// there's a pool
if (TSK_OK != addFsInfo(fs_info, m_curPoolVol, m_curFsId)) {
registerError();
return TSK_FILTER_STOP;
}
}
else if (m_volFound && m_vsFound) {
// there's a volume system and volume
if (TSK_OK != addFsInfo(fs_info, m_curVolId, m_curFsId)) {
registerError();
return TSK_FILTER_STOP;
}
}
else {
// file system doesn't live in a volume, use image as parent
if (TSK_OK != addFsInfo(fs_info, m_curImgId, m_curFsId)) {
registerError();
return TSK_FILTER_STOP;
}
}
// We won't hit the root directory on the walk, so open it now
if ((file_root = tsk_fs_file_open(fs_info, NULL, "/")) != NULL) {
processFile(file_root, "");
tsk_fs_file_close(file_root);
file_root = NULL;
}
// make sure that flags are set to get all files -- we need this to
// find parent directory
TSK_FS_DIR_WALK_FLAG_ENUM filterFlags = (TSK_FS_DIR_WALK_FLAG_ENUM)
(TSK_FS_DIR_WALK_FLAG_ALLOC | TSK_FS_DIR_WALK_FLAG_UNALLOC);
//check if to skip processing of FAT orphans
if (m_noFatFsOrphans
&& TSK_FS_TYPE_ISFAT(fs_info->ftype) ) {
filterFlags = (TSK_FS_DIR_WALK_FLAG_ENUM) (filterFlags | TSK_FS_DIR_WALK_FLAG_NOORPHAN);
}
setFileFilterFlags(filterFlags);
return TSK_FILTER_CONT;
}
/* Insert the file data into the file table.
* @param fs_file
* @param fs_attr
* @param path
* Returns TSK_ERR on error.
*/
TSK_RETVAL_ENUM
TskAutoDbJava::insertFileData(TSK_FS_FILE * fs_file,
const TSK_FS_ATTR * fs_attr, const char *path)
{
if (TSK_ERR == addFsFile(fs_file, fs_attr, path, m_curFsId, m_curFileId,
m_curImgId)) {
registerError();
return TSK_ERR;
}
return TSK_OK;
}
/**
* Analyzes the open image and adds image info to a database.
* Does not deal with transactions and such. Refer to startAddImage()
* for more control.
* @returns 1 if a critical error occurred (DB doesn't exist, no file system, etc.), 2 if errors occurred at some point adding files to the DB (corrupt file, etc.), and 0 otherwise. Errors will have been registered.
*/
uint8_t TskAutoDbJava::addFilesInImgToDb()
{
// @@@ This seems bad because we are overriding what the user may
// have set. We should remove the public API if we are going to
// override it -- presumably this was added so that we always have
// unallocated volume space...
setVolFilterFlags((TSK_VS_PART_FLAG_ENUM) (TSK_VS_PART_FLAG_ALLOC |
TSK_VS_PART_FLAG_UNALLOC));
uint8_t retVal = 0;
if (findFilesInImg()) {
// map the boolean return value from findFiles to the three-state return value we use
// @@@ findFiles should probably return this three-state enum too
if (m_foundStructure == false) {
retVal = 1;
}
else {
retVal = 2;
}
}
TSK_RETVAL_ENUM addUnallocRetval = TSK_OK;
if (m_addUnallocSpace)
addUnallocRetval = addUnallocSpaceToDb();
// findFiles return value trumps unalloc since it can return either 2 or 1.
if (retVal) {
return retVal;
}
else if (addUnallocRetval == TSK_ERR) {
return 2;
}
else {
return 0;
}
}
/**
* Start the process to add image/file metadata to database inside of a transaction.
* User must call either commitAddImage() to commit the changes,
* or revertAddImage() to revert them.
*
* @param numImg Number of image parts
* @param imagePaths Array of paths to the image parts
* @param imgType Image type
* @param sSize Size of device sector in bytes (or 0 for default)
* @param deviceId An ASCII-printable identifier for the device associated with the data source that is intended to be unique across multiple cases (e.g., a UUID)
* @return 0 for success, 1 for failure
*/
uint8_t
TskAutoDbJava::startAddImage(int numImg, const TSK_TCHAR * const imagePaths[],
TSK_IMG_TYPE_ENUM imgType, unsigned int sSize, const char* deviceId)
{
if (tsk_verbose)
tsk_fprintf(stderr, "TskAutoDbJava::startAddImage: Starting add image process\n");
if (openImage(numImg, imagePaths, imgType, sSize, deviceId)) {
tsk_error_set_errstr2("TskAutoDbJava::startAddImage");
registerError();
return 1;
}
if (m_imageWriterEnabled) {
tsk_img_writer_create(m_img_info, m_imageWriterPath);
}
if (m_addFileSystems) {
return addFilesInImgToDb();
} else {
return 0;
}
}
/**
* Start the process to add image/file metadata to database inside of a transaction.
* User must call either commitAddImage() to commit the changes,
* or revertAddImage() to revert them.
*
* @param img_info Previously initialized TSK_IMG_INFO object
* @param deviceId An ASCII-printable identifier for the device associated with the data source that is intended to be unique across multiple cases (e.g., a UUID)
* @return 0 for success, 1 for failure
*/
uint8_t
TskAutoDbJava::startAddImage(TSK_IMG_INFO * img_info, const char* deviceId)
{
openImageHandle(img_info);
if (m_img_info == NULL) {
return 1;
}
if (tsk_verbose)
tsk_fprintf(stderr, "TskAutoDbJava::startAddImage: Starting add image process\n");
if (openImage(deviceId)) {
tsk_error_set_errstr2("TskAutoDbJava::startAddImage");
registerError();
return 1;
}
if (m_imageWriterEnabled) {
if (tsk_img_writer_create(m_img_info, m_imageWriterPath)) {
registerError();
return 1;
}
}
if (m_addFileSystems) {
return addFilesInImgToDb();
}
else {
return 0;
}
}
#ifdef WIN32
/**
* Start the process to add image/file metadata to database inside of a transaction.
* Same functionality as addFilesInImgToDb(). Reverts
* all changes on error. User must call either commitAddImage() to commit the changes,
* or revertAddImage() to revert them.
*
* @param numImg Number of image parts
* @param imagePaths Array of paths to the image parts
* @param imgType Image type
* @param sSize Size of device sector in bytes (or 0 for default)
* @param deviceId An ASCII-printable identifier for the device associated with the data source that is intended to be unique across multiple cases (e.g., a UUID)
* @return 0 for success 1, for failure
*/
uint8_t
TskAutoDbJava::startAddImage(int numImg, const char *const imagePaths[],
TSK_IMG_TYPE_ENUM imgType, unsigned int sSize, const char* deviceId)
{
if (tsk_verbose)
tsk_fprintf(stderr, "TskAutoDbJava::startAddImage_utf8: Starting add image process\n");
if (openImageUtf8(numImg, imagePaths, imgType, sSize, deviceId)) {
tsk_error_set_errstr2("TskAutoDbJava::startAddImage");
registerError();
return 1;
}
if (m_imageWriterEnabled) {
tsk_img_writer_create(m_img_info, m_imageWriterPath);
}
if (m_addFileSystems) {
return addFilesInImgToDb();
} else {
return 0;
}
}
#endif
/**
* Cancel the running process. Will not be handled immediately.
*/
void
TskAutoDbJava::stopAddImage()
{
if (tsk_verbose)
tsk_fprintf(stderr, "TskAutoDbJava::stopAddImage: Stop request received\n");
m_stopped = true;
setStopProcessing();
// flag is checked every time processFile() is called
}
/**
* Set the current image's timezone
*/
void
TskAutoDbJava::setTz(string tzone)
{
m_curImgTZone = tzone;
}
/**
* Set the object ID for the data source
*/
void
TskAutoDbJava::setDatasourceObjId(int64_t img_id)
{
m_curImgId = img_id;
}
TSK_RETVAL_ENUM
TskAutoDbJava::processFile(TSK_FS_FILE * fs_file, const char *path)
{
// Check if the process has been canceled
if (m_stopped) {
if (tsk_verbose)
tsk_fprintf(stderr, "TskAutoDbJava::processFile: Stop request detected\n");
return TSK_STOP;
}
/* Update the current directory, which can be used to show
* progress. If we get a directory, then use its name. We
* do this so that when we are searching for orphan files, then
* we at least show $OrphanFiles as status. The secondary check
* is to grab the parent folder from files once we return back
* into a folder when we are doing our depth-first recursion. */
if (isDir(fs_file)) {
m_curDirAddr = fs_file->name->meta_addr;
tsk_take_lock(&m_curDirPathLock);
m_curDirPath = string(path) + fs_file->name->name;
tsk_release_lock(&m_curDirPathLock);
}
else if (m_curDirAddr != fs_file->name->par_addr) {
m_curDirAddr = fs_file->name->par_addr;
tsk_take_lock(&m_curDirPathLock);
m_curDirPath = path;
tsk_release_lock(&m_curDirPathLock);
}
/* process the attributes. The case of having 0 attributes can occur
* with virtual / sparse files and HFS directories.
* At some point, this can probably be cleaned
* up if TSK is more consistent about if there should always be an
* attribute or not. Sometimes, none of the attributes are added
* because of their type and we always want to add a reference to
* every file. */
TSK_RETVAL_ENUM retval = TSK_OK;
m_attributeAdded = false;
if (tsk_fs_file_attr_getsize(fs_file) > 0) {
retval = processAttributes(fs_file, path);
}
// insert a general row if we didn't add a specific attribute one
if ((retval == TSK_OK) && (m_attributeAdded == false)) {
retval = insertFileData(fs_file, NULL, path);
}
// reset the file id
m_curFileId = 0;
if (retval == TSK_STOP)
return TSK_STOP;
else
return TSK_OK;
}
// we return only OK or STOP -- errors are registered only and OK is returned.
TSK_RETVAL_ENUM
TskAutoDbJava::processAttribute(TSK_FS_FILE * fs_file,
const TSK_FS_ATTR * fs_attr, const char *path)
{
// add the file metadata for the default attribute type
if (isDefaultType(fs_file, fs_attr)) {
if (insertFileData(fs_attr->fs_file, fs_attr, path) == TSK_ERR) {
registerError();
return TSK_OK;
}
else {
m_attributeAdded = true;
}
}
return TSK_OK;
}
/**
* Callback invoked per every unallocated block in the filesystem
* Creates file ranges and file entries
* A single file entry per consecutive range of blocks
* @param a_block block being walked
* @param a_ptr a pointer to an UNALLOC_BLOCK_WLK_TRACK struct
* @returns TSK_WALK_CONT if continue, otherwise TSK_WALK_STOP if stop processing requested
*/
TSK_WALK_RET_ENUM TskAutoDbJava::fsWalkUnallocBlocksCb(const TSK_FS_BLOCK *a_block, void *a_ptr) {
UNALLOC_BLOCK_WLK_TRACK * unallocBlockWlkTrack = (UNALLOC_BLOCK_WLK_TRACK *) a_ptr;
if (unallocBlockWlkTrack->tskAutoDbJava.m_stopAllProcessing)
return TSK_WALK_STOP;
// initialize if this is the first block
if (unallocBlockWlkTrack->isStart) {
unallocBlockWlkTrack->isStart = false;
unallocBlockWlkTrack->curRangeStart = a_block->addr;
unallocBlockWlkTrack->prevBlock = a_block->addr;
unallocBlockWlkTrack->size = unallocBlockWlkTrack->fsInfo.block_size;
unallocBlockWlkTrack->nextSequenceNo = 0;
return TSK_WALK_CONT;
}
// We want to keep consecutive blocks in the same run, so simply update prevBlock and the size
// if this one is consecutive with the last call. But, if we have hit the max chunk
// size, then break up this set of consecutive blocks.
if ((a_block->addr == unallocBlockWlkTrack->prevBlock + 1) && ((unallocBlockWlkTrack->maxChunkSize <= 0) ||
(unallocBlockWlkTrack->size < unallocBlockWlkTrack->maxChunkSize))) {
unallocBlockWlkTrack->prevBlock = a_block->addr;
unallocBlockWlkTrack->size += unallocBlockWlkTrack->fsInfo.block_size;
return TSK_WALK_CONT;
}
// this block is not contiguous with the previous one or we've hit the maximum size; create and add a range object
const uint64_t rangeStartOffset = unallocBlockWlkTrack->curRangeStart * unallocBlockWlkTrack->fsInfo.block_size
+ unallocBlockWlkTrack->fsInfo.offset;
const uint64_t rangeSizeBytes = (1 + unallocBlockWlkTrack->prevBlock - unallocBlockWlkTrack->curRangeStart)
* unallocBlockWlkTrack->fsInfo.block_size;
unallocBlockWlkTrack->ranges.push_back(TSK_DB_FILE_LAYOUT_RANGE(rangeStartOffset, rangeSizeBytes, unallocBlockWlkTrack->nextSequenceNo++));
// Return (instead of adding this run) if we are going to:
// a) Make one big file with all unallocated space (minChunkSize == 0)
// or
// b) Only make an unallocated file once we have at least chunkSize bytes
// of data in our current run (minChunkSize > 0)
// In either case, reset the range pointers and add this block to the size
if ((unallocBlockWlkTrack->minChunkSize == 0) ||
((unallocBlockWlkTrack->minChunkSize > 0) &&
(unallocBlockWlkTrack->size < unallocBlockWlkTrack->minChunkSize))) {
unallocBlockWlkTrack->size += unallocBlockWlkTrack->fsInfo.block_size;
unallocBlockWlkTrack->curRangeStart = a_block->addr;
unallocBlockWlkTrack->prevBlock = a_block->addr;
return TSK_WALK_CONT;
}
// at this point we are either chunking and have reached the chunk limit
// or we're not chunking. Either way we now add what we've got to the DB
int64_t fileObjId = 0;
TskAutoDbJava & tskAutoDbJava = unallocBlockWlkTrack->tskAutoDbJava;
if (tskAutoDbJava.addUnallocBlockFile(tskAutoDbJava.m_curUnallocDirId,
unallocBlockWlkTrack->fsObjId, unallocBlockWlkTrack->size, unallocBlockWlkTrack->ranges, fileObjId, tskAutoDbJava.m_curImgId) == TSK_ERR) {
// @@@ Handle error -> Don't have access to registerError() though...
}
// reset
unallocBlockWlkTrack->curRangeStart = a_block->addr;
unallocBlockWlkTrack->prevBlock = a_block->addr;
unallocBlockWlkTrack->size = unallocBlockWlkTrack->fsInfo.block_size; // The current block is part of the new range
unallocBlockWlkTrack->ranges.clear();
unallocBlockWlkTrack->nextSequenceNo = 0;
//we don't know what the last unalloc block is in advance
//and will handle the last range in addFsInfoUnalloc()
return TSK_WALK_CONT;
}
/**
* Add unallocated space for the given file system to the database.
* Create files for consecutive unalloc block ranges.
* @param dbFsInfo fs to process
* @returns TSK_OK on success, TSK_ERR on error
*/
TSK_RETVAL_ENUM TskAutoDbJava::addFsInfoUnalloc(const TSK_DB_FS_INFO & dbFsInfo) {
// Unalloc space is handled separately for APFS
if (dbFsInfo.fType == TSK_FS_TYPE_APFS) {
return TSK_OK;
}
//open the fs we have from database
TSK_FS_INFO * fsInfo = tsk_fs_open_img(m_img_info, dbFsInfo.imgOffset, dbFsInfo.fType);
if (fsInfo == NULL) {
tsk_error_set_errstr2("TskAutoDbJava::addFsInfoUnalloc: error opening fs at offset %" PRIdOFF, dbFsInfo.imgOffset);
registerError();
return TSK_ERR;
}
//create a "fake" dir to hold the unalloc files for the fs
if (addUnallocFsBlockFilesParent(dbFsInfo.objId, m_curUnallocDirId, m_curImgId) == TSK_ERR) {
tsk_error_set_errstr2("addFsInfoUnalloc: error creating dir for unallocated space");
registerError();
return TSK_ERR;
}
//walk unalloc blocks on the fs and process them
//initialize the unalloc block walk tracking
UNALLOC_BLOCK_WLK_TRACK unallocBlockWlkTrack(*this, *fsInfo, dbFsInfo.objId, m_minChunkSize, m_maxChunkSize);
uint8_t block_walk_ret = tsk_fs_block_walk(fsInfo, fsInfo->first_block, fsInfo->last_block, (TSK_FS_BLOCK_WALK_FLAG_ENUM)(TSK_FS_BLOCK_WALK_FLAG_UNALLOC | TSK_FS_BLOCK_WALK_FLAG_AONLY),
fsWalkUnallocBlocksCb, &unallocBlockWlkTrack);
if (block_walk_ret == 1) {
stringstream errss;
tsk_fs_close(fsInfo);
errss << "TskAutoDbJava::addFsInfoUnalloc: error walking fs unalloc blocks, fs id: ";
errss << unallocBlockWlkTrack.fsObjId;
tsk_error_set_errstr2("%s", errss.str().c_str());
registerError();
return TSK_ERR;
}
if(m_stopAllProcessing) {
tsk_fs_close(fsInfo);
return TSK_OK;
}
// handle creation of the last range
// make range inclusive from curBlockStart to prevBlock
const uint64_t byteStart = unallocBlockWlkTrack.curRangeStart * fsInfo->block_size + fsInfo->offset;
const uint64_t byteLen = (1 + unallocBlockWlkTrack.prevBlock - unallocBlockWlkTrack.curRangeStart) * fsInfo->block_size;
unallocBlockWlkTrack.ranges.push_back(TSK_DB_FILE_LAYOUT_RANGE(byteStart, byteLen, unallocBlockWlkTrack.nextSequenceNo++));
int64_t fileObjId = 0;
if (addUnallocBlockFile(m_curUnallocDirId, dbFsInfo.objId, unallocBlockWlkTrack.size, unallocBlockWlkTrack.ranges, fileObjId, m_curImgId) == TSK_ERR) {
registerError();
tsk_fs_close(fsInfo);
return TSK_ERR;
}
//cleanup
tsk_fs_close(fsInfo);
return TSK_OK;
}
/**
* Process all unallocated space for this disk image and create "virtual" files with layouts
* @returns TSK_OK on success, TSK_ERR on error
*/
TSK_RETVAL_ENUM TskAutoDbJava::addUnallocSpaceToDb() {
if (m_stopAllProcessing) {
return TSK_OK;
}
size_t numVsP = 0;
size_t numFs = 0;
size_t numPool = 0;
TSK_RETVAL_ENUM retFsSpace = addUnallocFsSpaceToDb(numFs);
TSK_RETVAL_ENUM retVsSpace = addUnallocVsSpaceToDb(numVsP);
TSK_RETVAL_ENUM retPoolSpace = addUnallocatedPoolBlocksToDb(numPool);
//handle case when no fs and no vs partitions and no pools
TSK_RETVAL_ENUM retImgFile = TSK_OK;
if (numVsP == 0 && numFs == 0 && numPool == 0) {
retImgFile = addUnallocImageSpaceToDb();
}
if (retFsSpace == TSK_ERR || retVsSpace == TSK_ERR || retPoolSpace == TSK_ERR || retImgFile == TSK_ERR)
return TSK_ERR;
else
return TSK_OK;
}
/**
* Process each file system in the database and add its unallocated sectors to virtual files.
* @param numFs (out) number of filesystems found
* @returns TSK_OK on success, TSK_ERR on error (if some or all fs could not be processed)
*/
TSK_RETVAL_ENUM TskAutoDbJava::addUnallocFsSpaceToDb(size_t & numFs) {
if(m_stopAllProcessing) {
return TSK_OK;
}
numFs = m_savedFsInfo.size();
TSK_RETVAL_ENUM allFsProcessRet = TSK_OK;
for (vector<TSK_DB_FS_INFO>::iterator it = m_savedFsInfo.begin(); it!= m_savedFsInfo.end(); ++it) {
if (m_stopAllProcessing) {
break;
}
if (addFsInfoUnalloc(*it) == TSK_ERR)
allFsProcessRet = TSK_ERR;
}
//TODO set parent_path for newly created virt dir/file hierarchy for consistency
return allFsProcessRet;
}
/**
* Process each volume in the database and add its unallocated sectors to virtual files.
* @param numVsP (out) number of vs partitions found
* @returns TSK_OK on success, TSK_ERR on error
*/
TSK_RETVAL_ENUM TskAutoDbJava::addUnallocVsSpaceToDb(size_t & numVsP) {
numVsP = m_savedVsPartInfo.size();
//get fs infos to see if this vspart has fs
for (vector<TSK_DB_VS_PART_INFO>::const_iterator it = m_savedVsPartInfo.begin();
it != m_savedVsPartInfo.end(); ++it) {
if (m_stopAllProcessing) {
break;
}
const TSK_DB_VS_PART_INFO &vsPart = *it;
//interested in unalloc, meta, or alloc and no fs
if ( (vsPart.flags & (TSK_VS_PART_FLAG_UNALLOC | TSK_VS_PART_FLAG_META)) == 0 ) {
//check if vspart has no fs
bool hasFs = false;
for (vector<TSK_DB_FS_INFO>::const_iterator itFs = m_savedFsInfo.begin();
itFs != m_savedFsInfo.end(); ++itFs) {
const TSK_DB_FS_INFO & fsInfo = *itFs;
TSK_DB_OBJECT* fsObjInfo = NULL;
if (getObjectInfo(fsInfo.objId, &fsObjInfo) == TSK_ERR ) {
stringstream errss;
errss << "addUnallocVsSpaceToDb: error getting object info for fs from db, objId: " << fsInfo.objId;
tsk_error_set_errstr2("%s", errss.str().c_str());
registerError();
return TSK_ERR;
}
if (fsObjInfo->parObjId == vsPart.objId) {
hasFs = true;
break;
}
}
if (hasFs == true) {
//skip processing this vspart
continue;
}
// Check if the volume contains a pool
bool hasPool = false;
for (std::map<int64_t, int64_t>::iterator iter = m_poolOffsetToParentId.begin(); iter != m_poolOffsetToParentId.end(); ++iter) {
if (iter->second == vsPart.objId) {
hasPool = true;
}
}
if (hasPool) {
// Skip processing this vspart
continue;
}
}
// Get sector size and image offset from parent vs info
// Get parent id of this vs part
TSK_DB_OBJECT* vsPartObj = NULL;
if (getObjectInfo(vsPart.objId, &vsPartObj) == TSK_ERR) {
stringstream errss;
errss << "addUnallocVsSpaceToDb: error getting object info for vs part from db, objId: " << vsPart.objId;
tsk_error_set_errstr2("%s", errss.str().c_str());
registerError();
return TSK_ERR;
}
if (vsPartObj == NULL) {
return TSK_ERR;
}
TSK_DB_VS_INFO* vsInfo = NULL;
for (vector<TSK_DB_VS_INFO>::iterator itVs = m_savedVsInfo.begin();
itVs != m_savedVsInfo.end(); ++itVs) {
TSK_DB_VS_INFO* temp_vs_info = &(*itVs);
if (temp_vs_info->objId == vsPartObj->parObjId) {
vsInfo = temp_vs_info;
}
}
if (vsInfo == NULL ) {
stringstream errss;
errss << "addUnallocVsSpaceToDb: error getting volume system info from db, objId: " << vsPartObj->parObjId;
tsk_error_set_errstr2("%s", errss.str().c_str());
registerError();
return TSK_ERR;
}
// Create an unalloc file with unalloc part, with vs part as parent
vector<TSK_DB_FILE_LAYOUT_RANGE> ranges;
const uint64_t byteStart = vsInfo->offset + vsInfo->block_size * vsPart.start;
const uint64_t byteLen = vsInfo->block_size * vsPart.len;
TSK_DB_FILE_LAYOUT_RANGE tempRange(byteStart, byteLen, 0);
ranges.push_back(tempRange);
int64_t fileObjId = 0;
if (addUnallocBlockFile(vsPart.objId, 0, tempRange.byteLen, ranges, fileObjId, m_curImgId) == TSK_ERR) {
registerError();
return TSK_ERR;
}
}
return TSK_OK;
}
/**
* Adds unalloc space for the image if there is no volumes and no file systems.
*
* @returns TSK_OK on success, TSK_ERR on error
*/
TSK_RETVAL_ENUM TskAutoDbJava::addUnallocImageSpaceToDb() {
const TSK_OFF_T imgSize = getImageSize();
if (imgSize == -1) {
tsk_error_set_errstr("addUnallocImageSpaceToDb: error getting current image size, can't create unalloc block file for the image.");
registerError();
return TSK_ERR;
}
else {
TSK_DB_FILE_LAYOUT_RANGE tempRange(0, imgSize, 0);
//add unalloc block file for the entire image
vector<TSK_DB_FILE_LAYOUT_RANGE> ranges;
ranges.push_back(tempRange);
int64_t fileObjId = 0;
if (TSK_ERR == addUnallocBlockFile(m_curImgId, 0, imgSize, ranges, fileObjId, m_curImgId)) {
return TSK_ERR;
}
}
return TSK_OK;
}
/**
* Returns the directory currently being analyzed by processFile().
* Safe to use from another thread than processFile().
*
* @returns curDirPath string representing currently analyzed directory
*/
const std::string TskAutoDbJava::getCurDir() {
string curDirPath;
tsk_take_lock(&m_curDirPathLock);
curDirPath = m_curDirPath;
tsk_release_lock(&m_curDirPathLock);
return curDirPath;
}
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