def get_brs():
logging.basicConfig(level=logging.DEBUG)
_logger = logging.getLogger(os.path.basename(__file__))
br = Objects.ByteRun()
br.file_offset = 4128
br.len = 133
brs = Objects.ByteRuns()
brs.append(br)
return brs
def test_all():
_logger = logging.getLogger(os.path.basename(__file__))
logging.basicConfig(level=logging.DEBUG)
br1 = Objects.ByteRun(img_offset=1, len=1)
br2 = Objects.ByteRun(img_offset=2, len=2)
br3 = Objects.ByteRun(img_offset=4, len=3)
dbr = Objects.ByteRuns()
ibr = Objects.ByteRuns()
nbr = Objects.ByteRuns()
dbr.append(br1)
ibr.append(br2)
nbr.append(br3)
dbr.facet = "data"
ibr.facet = "inode"
nbr.facet = "name"
f1 = Objects.FileObject()
f1.data_brs = dbr
f1.inode_brs = ibr
f1.name_brs = nbr
assert f1.data_brs[0].img_offset == 1
assert f1.inode_brs[0].img_offset == 2
assert f1.name_brs[0].img_offset == 4
e1 = f1.to_Element()
#_logger.debug(f1)
#_logger.debug(ET.tostring(e1))
f2 = Objects.FileObject()
f2.populate_from_Element(e1)
#_logger.debug(f2)
assert f2.data_brs[0].img_offset == 1
assert f2.inode_brs[0].img_offset == 2
assert f2.name_brs[0].img_offset == 4
def test_hash_properties():
dobj = Objects.DFXMLObject(version="1.2.0")
fobj = Objects.FileObject()
dobj.append(fobj)
fobj.byte_runs = Objects.ByteRuns()
br = Objects.ByteRun()
fobj.byte_runs.append(br)
fobj.filesize = len(TEST_BYTE_STRING)
br.len = len(TEST_BYTE_STRING)
hash_functions = {"md5", "sha1", "sha224", "sha256", "sha384", "sha512"}
# Key: Hash function.
# Value: Hash of the byte string b"test".
hash_values = dict()
for hash_function in sorted(hash_functions):
hash_object = getattr(hashlib, hash_function)()
hash_object.update(TEST_BYTE_STRING)
hash_values[hash_function] = hash_object.hexdigest()
_logger.debug("hash_values[%r] = %r." %
(hash_function, hash_values[hash_function]))
setattr(fobj, hash_function, hash_values[hash_function])
setattr(br, hash_function, hash_values[hash_function])
assert getattr(fobj, hash_function) == hash_values[hash_function]
assert getattr(br, hash_function) == hash_values[hash_function]
# Do file I/O round trip.
(tmp_filename, dobj_reconst) = libtest.file_round_trip_dfxmlobject(dobj)
try:
fobj_reconst = dobj_reconst.files[0]
br_reconst = fobj_reconst.byte_runs[0]
for hash_function in sorted(hash_functions):
assert getattr(fobj_reconst,
hash_function) == hash_values[hash_function]
assert getattr(br_reconst,
hash_function) == hash_values[hash_function]
except:
_logger.debug("tmp_filename = %r." % tmp_filename)
raise
os.remove(tmp_filename)
def test_all():
br0 = Objects.ByteRun()
br0.img_offset = 0
br0.len = 20
br1 = Objects.ByteRun()
br1.img_offset = 20
br1.len = 30
br2 = Objects.ByteRun()
br2.img_offset = 50
br2.len = 20
brs_contiguous = Objects.ByteRuns()
brs_contiguous.append(br0)
brs_contiguous.append(br1)
brs_contiguous.append(br2)
brs_glommed = Objects.ByteRuns()
brs_glommed.glom(br0)
brs_glommed.glom(br1)
brs_glommed.glom(br2)
brs_discontig = Objects.ByteRuns()
brs_discontig.glom(br0)
brs_discontig.glom(br2)
brs_backward = Objects.ByteRuns()
brs_backward.glom(br1)
brs_backward.glom(br0)
assert len(brs_contiguous) == 3
assert len(brs_glommed) == 1
assert len(brs_discontig) == 2
assert len(brs_backward) == 2
assert brs_glommed[0].len == 70
assert brs_backward[0].len == 30
assert brs_backward[1].len == 20
br_facet_data = Objects.ByteRuns(facet="data")
br_facet_name = Objects.ByteRuns(facet="name")
br_facet_default = Objects.ByteRuns()
assert br_facet_data == br_facet_default
assert br_facet_name != br_facet_data
assert br_facet_name != br_facet_default
def parse(self, in_fh):
"""
Returns a DFXMLObject.
"""
dobj = Objects.DFXMLObject(version="1.2.0+")
dobj.program = sys.argv[0]
dobj.program_version = __version__
dobj.command_line = " ".join(sys.argv)
dobj.dc["type"] = "Disk image sector map"
dobj.add_creator_library("Python", ".".join(map(str, sys.version_info[0:3]))) #A bit of a bend, but gets the major version information out.
dobj.add_creator_library("Objects.py", Objects.__version__)
dobj.add_creator_library("dfxml.py", Objects.dfxml.__version__)
diobj = Objects.DiskImageObject()
dobj.append(diobj)
brs = Objects.ByteRuns()
diobj.byte_runs = brs
dobj.add_namespace("gddr", Objects.dfxml.XMLNS_DFXML + "#gddrescue")
self._state = ParseState.FILE_OPENED
self._disk_image_len = 0
for (line_no, line) in enumerate(in_fh):
self._line_no = line_no
cleaned_line = line.strip()
if cleaned_line.startswith("0x"):
if self._state in (ParseState.TABLE_HEAD, ParseState.IN_TABLE):
self.transition(ParseState.IN_TABLE)
else:
self.transition(ParseState.CURRENT_POS_RECORD)
elif cleaned_line == "# pos size status":
self.transition(ParseState.TABLE_HEAD)
elif cleaned_line == "# current_pos current_status current_pass":
self.transition(ParseState.CURRENT_POS_HEAD)
else:
self.transition(ParseState.PRE_TABLE)
if self._state != ParseState.IN_TABLE:
continue
br = Objects.ByteRun()
line_parts = cleaned_line.split(" ")
br.img_offset = int(line_parts[0], base=16)
br.len = int(line_parts[1], base=16)
self._disk_image_len = br.img_offset + br.len
# TODO
# Independent design decision, while awaiting a consensus design:
# Only report the byte runs ddrescue was able to collect.
if line_parts[2] != "+":
continue
brs.append(br)
diobj.filesize = self._disk_image_len
_logger.info("diobj.filesize = %r." % diobj.filesize)
self.transition(ParseState.STREAM_COMPLETE)
return dobj
def __init__(self, *args, **kwargs):
super(TCPFlowScannerResult_ZipGenericHeaderDetector,
self).__init__(*args, **kwargs)
self.byte_runs = Objects.ByteRuns()
def make_differential_dfxml(pre, post, **kwargs):
"""
Takes as input two paths to DFXML files. Returns a DFXMLObject.
@param pre String.
@param post String.
@param diff_mode Optional. One of "all" or "idifference".
@param retain_unchanged Optional. Boolean.
@param ignore_properties Optional. Set.
@param annotate_matches Optional. Boolean. True -> matched file objects get a "delta:matched='1'" attribute.
@param rename_requires_hash Optional. Boolean. True -> all matches require matching SHA-1's, if present.
@param ignore_filename_function Optional. Function, string -> Boolean. Returns True if a file name (which can be null) should be ignored.
@param glom_byte_runs Optional. Boolean. Joins contiguous-region byte runs together in FileObject byte run lists.
"""
diff_mode = kwargs.get("diff_mode", "all")
retain_unchanged = kwargs.get("retain_unchanged", False)
ignore_properties = kwargs.get("ignore_properties", set())
annotate_matches = kwargs.get("annotate_matches", False)
rename_requires_hash = kwargs.get("rename_requires_hash", False)
ignore_filename_function = kwargs.get("ignore_filename_function",
ignorable_name)
glom_byte_runs = kwargs.get("glom_byte_runs", False)
_expected_diff_modes = ["all", "idifference"]
if diff_mode not in _expected_diff_modes:
raise ValueError("Differencing mode should be in: %r." %
_expected_diff_modes)
diff_mask_set = set()
if diff_mode == "idifference":
diff_mask_set |= set([
"atime", "byte_runs", "crtime", "ctime", "filename", "filesize",
"md5", "mtime", "sha1"
])
_logger.debug("diff_mask_set = " + repr(diff_mask_set))
#d: The container DFXMLObject, ultimately returned.
d = Objects.DFXMLObject(version="1.2.0")
if sys.argv[0] == os.path.basename(__file__):
d.program = sys.argv[0]
d.program_version = __version__
d.command_line = " ".join(sys.argv)
d.add_namespace("delta", dfxml.XMLNS_DELTA)
d.dc["type"] = "Disk image difference set"
d.add_creator_library("Python", ".".join(
map(str, sys.version_info[0:3]
))) #A bit of a bend, but gets the major version information out.
d.add_creator_library("Objects.py", Objects.__version__)
d.add_creator_library("dfxml.py", Objects.dfxml.__version__)
d.diff_file_ignores |= ignore_properties
_logger.debug("d.diff_file_ignores = " + repr(d.diff_file_ignores))
#The list most of this function is spent on building
fileobjects_changed = []
#Unmodified files; only retained if requested.
fileobjects_unchanged = []
#Key: (partition, inode, filename); value: FileObject
old_fis = None
new_fis = None
#Key: (partition, inode, filename); value: FileObject list
old_fis_unalloc = None
new_fis_unalloc = None
#Key: Partition byte offset within the disk image, paired with the file system type
#Value: VolumeObject
old_volumes = None
new_volumes = None
matched_volumes = dict()
#Populated in distinct (offset, file system type as string) encounter order
volumes_encounter_order = dict()
for infile in [pre, post]:
_logger.debug("infile = %r" % infile)
old_fis = new_fis
new_fis = dict()
old_volumes = new_volumes
new_volumes = dict()
#Fold in the matched volumes - we're just discarding the deleted volumes
for k in matched_volumes:
old_volumes[k] = matched_volumes[k]
matched_volumes = dict()
old_fis_unalloc = new_fis_unalloc
new_fis_unalloc = collections.defaultdict(list)
d.sources.append(infile)
for (i, (event, new_obj)) in enumerate(Objects.iterparse(infile)):
if isinstance(new_obj, Objects.DFXMLObject):
#Inherit desired properties from the source DFXMLObject.
#Inherit namespaces
for (prefix, url) in new_obj.iter_namespaces():
d.add_namespace(prefix, url)
continue
elif isinstance(new_obj, Objects.VolumeObject):
if event == "end":
#This algorithm doesn't yet need to know when a volume is concluded. On to the next object.
continue
offset = new_obj.partition_offset
if offset is None:
raise AttributeError(
"To perform differencing with volumes, the <volume> elements must have a <partition_offset>. Either re-generate your DFXML with partition offsets, or run this program again with the --ignore-volumes flag."
)
#Use the lower-case volume spelling
ftype_str = _lower_ftype_str(new_obj)
#Re-capping the general differential analysis algorithm:
#0. If the volume is in the new list, something's gone wrong.
if (offset, ftype_str) in new_volumes:
_logger.debug("new_obj.partition_offset = %r." % offset)
_logger.warning(
"Encountered a volume that starts at an offset as another volume, in the same disk image. This analysis is based on the assumption that that doesn't happen. Check results that depend on partition mappings."
)
#1. If the volume is in the old list, pop it out of the old list - it's matched.
if old_volumes and (offset, ftype_str) in old_volumes:
_logger.debug(
"Found a volume in post image, at offset %r." % offset)
old_obj = old_volumes.pop((offset, ftype_str))
new_obj.original_volume = old_obj
new_obj.compare_to_original()
matched_volumes[(offset, ftype_str)] = new_obj
#2. If the volume is NOT in the old list, add it to the new list.
else:
_logger.debug("Found a new volume, at offset %r." % offset)
new_volumes[(offset, ftype_str)] = new_obj
volumes_encounter_order[(
offset, ftype_str)] = len(new_volumes) + (
(old_volumes and len(old_volumes))
or 0) + len(matched_volumes)
#3. Afterwards, the old list contains deleted volumes.
#Record the ID
new_obj.id = volumes_encounter_order[(offset, ftype_str)]
#Move on to the next object
continue
elif not isinstance(new_obj, Objects.FileObject):
#The rest of this loop compares only file objects.
continue
if ignore_filename_function(new_obj.filename):
continue
#Simplify byte runs if requested
if glom_byte_runs:
if new_obj.byte_runs:
temp_byte_runs = Objects.ByteRuns()
for run in new_obj.byte_runs:
temp_byte_runs.glom(run)
new_obj.byte_runs = temp_byte_runs
#Normalize the partition number
if new_obj.volume_object is None:
new_obj.partition = None
else:
vo = new_obj.volume_object
fts = _lower_ftype_str(vo)
new_obj.partition = volumes_encounter_order[(
vo.partition_offset, fts)]
#Define the identity key of this file -- affected by the --ignore argument
_key_partition = None if "partition" in ignore_properties else new_obj.partition
_key_inode = None if "inode" in ignore_properties else new_obj.inode
_key_filename = None if "filename" in ignore_properties else new_obj.filename
key = (_key_partition, _key_inode, _key_filename)
#Ignore unallocated content comparisons until a later loop. The unique identification of deleted files needs a little more to work.
if not new_obj.alloc:
new_fis_unalloc[key].append(new_obj)
continue
#The rest of this loop is irrelevant until the second DFXML file.
if old_fis is None:
new_fis[key] = new_obj
continue
if key in old_fis:
#Extract the old fileobject and check for changes
old_obj = old_fis.pop(key)
new_obj.original_fileobject = old_obj
new_obj.compare_to_original(file_ignores=d.diff_file_ignores)
#_logger.debug("Diffs: %r." % _diffs)
_diffs = new_obj.diffs - d.diff_file_ignores
#_logger.debug("Diffs after ignore-set: %r." % _diffs)
if diff_mask_set:
_diffs &= diff_mask_set
#_logger.debug("Diffs after mask-set: %r." % _diffs)
if len(_diffs) > 0:
#_logger.debug("Remaining diffs: " + repr(_diffs))
fileobjects_changed.append(new_obj)
else:
#Unmodified file; only keep if requested.
if retain_unchanged:
fileobjects_unchanged.append(new_obj)
else:
#Store the new object
new_fis[key] = new_obj
#The rest of the files loop is irrelevant until the second file.
if old_fis is None:
continue
_logger.debug("len(old_fis) = %d" % len(old_fis))
_logger.debug("len(old_fis_unalloc) = %d" % len(old_fis_unalloc))
_logger.debug("len(new_fis) = %d" % len(new_fis))
_logger.debug("len(new_fis_unalloc) = %d" % len(new_fis_unalloc))
_logger.debug("len(fileobjects_changed) = %d" %
len(fileobjects_changed))
#Identify renames - only possible if 1-to-1. Many-to-many renames are just left as new and deleted files.
_logger.debug("Detecting renames...")
fileobjects_renamed = []
def _make_name_map(d):
"""Returns a dictionary, mapping (partition, inode) -> {filename}."""
retdict = collections.defaultdict(lambda: set())
for (partition, inode, filename) in d.keys():
retdict[(partition, inode)].add(filename)
return retdict
old_inode_names = _make_name_map(old_fis)
new_inode_names = _make_name_map(new_fis)
for key in new_inode_names.keys():
(partition, inode) = key
if len(new_inode_names[key]) != 1:
continue
if not key in old_inode_names:
continue
if len(old_inode_names[key]) != 1:
continue
if rename_requires_hash:
#Peek at the set elements by doing a quite-ephemeral list cast
old_obj = old_fis[(partition, inode,
list(old_inode_names[key])[0])]
new_obj = new_fis[(partition, inode,
list(new_inode_names[key])[0])]
if old_obj.sha1 != new_obj.sha1:
continue
#Found a match if we're at this point in the loop
old_name = old_inode_names[key].pop()
new_name = new_inode_names[key].pop()
old_obj = old_fis.pop((partition, inode, old_name))
new_obj = new_fis.pop((partition, inode, new_name))
new_obj.original_fileobject = old_obj
new_obj.compare_to_original(file_ignores=d.diff_file_ignores)
fileobjects_renamed.append(new_obj)
_logger.debug("len(old_fis) -> %d" % len(old_fis))
_logger.debug("len(new_fis) -> %d" % len(new_fis))
_logger.debug("len(fileobjects_changed) -> %d" %
len(fileobjects_changed))
_logger.debug("len(fileobjects_renamed) = %d" %
len(fileobjects_renamed))
#Identify files that just changed inode number - basically, doing the rename detection again
_logger.debug("Detecting inode number changes...")
def _make_inode_map(d):
"""Returns a dictionary, mapping (partition, filename) -> inode."""
retdict = dict()
for (partition, inode, filename) in d.keys():
if (partition, filename) in retdict:
_logger.warning(
"Multiple instances of the file path %r were found in partition %r; this violates an assumption of this program, that paths are unique within partitions."
% (filename, partition))
retdict[(partition, filename)] = inode
return retdict
old_name_inodes = _make_inode_map(old_fis)
new_name_inodes = _make_inode_map(new_fis)
for key in new_name_inodes.keys():
if not key in old_name_inodes:
continue
(partition, name) = key
old_obj = old_fis.pop((partition, old_name_inodes[key], name))
new_obj = new_fis.pop((partition, new_name_inodes[key], name))
new_obj.original_fileobject = old_obj
#TODO Test for what chaos ensues when filename is in the ignore list.
new_obj.compare_to_original(file_ignores=d.diff_file_ignores)
fileobjects_changed.append(new_obj)
_logger.debug("len(old_fis) -> %d" % len(old_fis))
_logger.debug("len(new_fis) -> %d" % len(new_fis))
_logger.debug("len(fileobjects_changed) -> %d" %
len(fileobjects_changed))
#And that's the end of the allocated-only, per-volume analysis.
#We may be able to match files that aren't allocated against files we think are deleted
_logger.debug("Detecting modifications from unallocated files...")
fileobjects_deleted = []
for key in new_fis_unalloc:
#1 partition; 1 inode number; 1 name, repeated: Too ambiguous to compare.
if len(new_fis_unalloc[key]) != 1:
continue
if key in old_fis_unalloc:
if len(old_fis_unalloc[key]) == 1:
#The file was unallocated in the previous image, too.
old_obj = old_fis_unalloc[key].pop()
new_obj = new_fis_unalloc[key].pop()
new_obj.original_fileobject = old_obj
new_obj.compare_to_original(
file_ignores=d.diff_file_ignores)
#The file might not have changed. It's interesting if it did, though.
_diffs = new_obj.diffs - diff_mask_set
#_logger.debug("Diffs: %r." % _diffs)
if diff_mask_set:
_diffs &= diff_mask_set
#_logger.debug("Diffs after mask-set: %r." % _diffs)
if len(_diffs) > 0:
_logger.debug("Remaining diffs: " + repr(_diffs))
fileobjects_changed.append(new_obj)
elif retain_unchanged:
fileobjects_unchanged.append(new_obj)
elif key in old_fis:
#Identified a deletion.
old_obj = old_fis.pop(key)
new_obj = new_fis_unalloc[key].pop()
new_obj.original_fileobject = old_obj
new_obj.compare_to_original(file_ignores=d.diff_file_ignores)
fileobjects_deleted.append(new_obj)
_logger.debug("len(old_fis) -> %d" % len(old_fis))
_logger.debug("len(old_fis_unalloc) -> %d" % len(old_fis_unalloc))
_logger.debug("len(new_fis) -> %d" % len(new_fis))
_logger.debug("len(new_fis_unalloc) -> %d" % len(new_fis_unalloc))
_logger.debug("len(fileobjects_changed) -> %d" %
len(fileobjects_changed))
_logger.debug("len(fileobjects_deleted) -> %d" %
len(fileobjects_deleted))
#After deletion matching is performed, one might want to look for files migrating to other partitions.
#However, since between-volume migration creates a new deleted file, this algorithm instead ignores partition migrations.
#AJN TODO Thinking about it a little more, I can't suss out a reason against trying this match. It's complicated if we try looking for reallocations in new_fis, strictly from new_fis_unalloc.
#TODO We might also want to match the unallocated objects based on metadata addresses. Unfortunately, that requires implementation of additional byte runs, which hasn't been fully designed yet in the DFXML schema.
#Begin output.
#First, annotate the volume objects.
for key in new_volumes:
v = new_volumes[key]
v.annos.add("new")
for key in old_volumes:
v = old_volumes[key]
v.annos.add("deleted")
for key in matched_volumes:
v = matched_volumes[key]
if len(v.diffs) > 0:
v.annos.add("modified")
#Build list of FileObject appenders, child volumes of the DFXML Document.
#Key: Partition number, or None
#Value: Reference to the VolumeObject corresponding with that partition number. None -> the DFXMLObject.
appenders = dict()
for volume_dict in [new_volumes, matched_volumes, old_volumes]:
for (offset, ftype_str) in volume_dict:
veo = volumes_encounter_order[(offset, ftype_str)]
if veo in appenders:
raise ValueError(
"This pair is already in the appenders dictionary, which was supposed to be distinct: "
+ repr((offset, ftype_str)) + ", encounter order " +
str(veo) + ".")
v = volume_dict[(offset, ftype_str)]
appenders[veo] = v
d.append(v)
#Add in the default appender, the DFXML Document itself.
appenders[None] = d
#A file should only be considered "modified" if its contents have changed.
content_diffs = set(["md5", "sha1", "sha256"])
def _maybe_match_attr(obj):
"""Just adds the 'matched' annotation when called."""
if annotate_matches:
obj.annos.add("matched")
#Populate DFXMLObject.
for key in new_fis:
#TODO If this script ever does a series of >2 DFXML files, these diff additions need to be removed for the next round.
fi = new_fis[key]
fi.annos.add("new")
appenders[fi.partition].append(fi)
for key in new_fis_unalloc:
for fi in new_fis_unalloc[key]:
fi.annos.add("new")
appenders[fi.partition].append(fi)
for fi in fileobjects_deleted:
#Independently flag for name, content, and metadata modifications
if len(fi.diffs - content_diffs) > 0:
fi.annos.add("changed")
if len(content_diffs.intersection(fi.diffs)) > 0:
fi.annos.add("modified")
if "filename" in fi.diffs:
fi.annos.add("renamed")
fi.annos.add("deleted")
_maybe_match_attr(fi)
appenders[fi.partition].append(fi)
for key in old_fis:
ofi = old_fis[key]
nfi = Objects.FileObject()
nfi.original_fileobject = ofi
nfi.annos.add("deleted")
appenders[ofi.partition].append(nfi)
for key in old_fis_unalloc:
for ofi in old_fis_unalloc[key]:
nfi = Objects.FileObject()
nfi.original_fileobject = ofi
nfi.annos.add("deleted")
appenders[ofi.partition].append(nfi)
for fi in fileobjects_renamed:
#Independently flag for content and metadata modifications
if len(content_diffs.intersection(fi.diffs)) > 0:
fi.annos.add("modified")
if len(fi.diffs - content_diffs) > 0:
fi.annos.add("changed")
fi.annos.add("renamed")
_maybe_match_attr(fi)
appenders[fi.partition].append(fi)
for fi in fileobjects_changed:
#Independently flag for content and metadata modifications
if len(content_diffs.intersection(fi.diffs)) > 0:
fi.annos.add("modified")
if len(fi.diffs - content_diffs) > 0:
fi.annos.add("changed")
_maybe_match_attr(fi)
appenders[fi.partition].append(fi)
for fi in fileobjects_unchanged:
_maybe_match_attr(fi)
appenders[fi.partition].append(fi)
#Output
return d
def main():
dobj = Objects.DFXMLObject(version="1.2.0")
dobj.program = sys.argv[0]
dobj.program_version = __version__
dobj.command_line = " ".join(sys.argv)
dobj.dc["type"] = "Example"
dobj.add_creator_library("Python", ".".join(map(str, sys.version_info[0:3]))) #A bit of a bend, but gets the major version information out.
dobj.add_creator_library("Objects.py", Objects.__version__)
dobj.add_creator_library("dfxml.py", Objects.dfxml.__version__)
vobj = Objects.VolumeObject()
dobj.append(vobj)
vobj.ftype_str = "examplefs"
# Define file system position.
vobj.byte_runs = Objects.ByteRuns()
vbr = Objects.ByteRun()
vobj.byte_runs.append(vbr)
vbr.img_offset = FILE_SYSTEM_START
vbr.len = DISK_IMAGE_SIZE - FILE_SYSTEM_START
fobj_specs = [
(
"first_sector.bin",
[
(0, 512)
]
),
(
"first_four_kilobytes.bin",
[
(0, 4000)
]
),
(
"contiguous_before_bad_region.dat",
[
(FILE_SYSTEM_START + 4096*1, 4096)
]
),
(
"contiguous_around_bad_region_left_edge.dat",
[
(DAMAGE_REGION_START - 4096, 8192)
]
),
(
"contiguous_in_bad_region.dat",
[
(DAMAGE_REGION_START + 4096*1, 4096)
]
),
(
"contiguous_around_bad_region_right_edge.dat",
[
(GOOD_REGION_START - 4096*1, 8192)
]
),
(
"contiguous_after_bad_region.dat",
[
(GOOD_REGION_START + 4096*2, 4096)
]
),
(
"fragmented_all_before_bad_region.dat",
[
(FILE_SYSTEM_START + 4096*10, 4096),
(FILE_SYSTEM_START + 4096*20, 4096),
(FILE_SYSTEM_START + 4096*30, 4096)
]
),
(
"fragmented_all_after_bad_region.dat",
[
(GOOD_REGION_START + 4096*10, 4096),
(GOOD_REGION_START + 4096*20, 4096),
(GOOD_REGION_START + 4096*30, 4096)
]
),
(
"fragmented_all_inside_bad_region.dat",
[
(DAMAGE_REGION_START + 4096*10, 4096),
(DAMAGE_REGION_START + 4096*20, 4096),
(DAMAGE_REGION_START + 4096*30, 4096)
]
),
(
"fragmented_beginning_inside_bad_region.dat",
[
(DAMAGE_REGION_START + 4096*40, 4096),
(GOOD_REGION_START + 4096*40, 4096)
]
),
(
"fragmented_middle_inside_bad_region.dat",
[
(FILE_SYSTEM_START + 4096*50, 4096),
(DAMAGE_REGION_START + 4096*50, 4096),
(GOOD_REGION_START + 4096*50, 4096)
]
),
(
"fragmented_end_inside_bad_region.dat",
[
(FILE_SYSTEM_START + 4096*60, 4096),
(DAMAGE_REGION_START + 4096*60, 4096)
]
),
(
"after_disk_image_end.dat",
[
(DISK_IMAGE_SIZE + 4096*1000, 4096)
]
),
(
"fragmented_partially_recoverable_directory",
[
(FILE_SYSTEM_START + 4096*170, 4096),
(DAMAGE_REGION_START + 4096*170, 4096),
(GOOD_REGION_START + 4096*170, 4096),
]
),
(
"fragmented_partially_recoverable_directory/child_file_1",
[
(FILE_SYSTEM_START + 4096*180, 4096)
]
),
(
"fragmented_partially_recoverable_directory/child_file_2",
[
(FILE_SYSTEM_START + 4096*190, 4096)
]
),
(
"fragmented_partially_recoverable_directory/child_file_3",
[
(FILE_SYSTEM_START + 4096*200, 4096)
]
),
(
"fragmented_partially_recoverable_directory/child_file_4",
[
(FILE_SYSTEM_START + 4096*210, 4096)
]
),
(
"fragmented_partially_recoverable_directory/child_file_9",
[
(GOOD_REGION_START + 4096*180, 4096)
]
)
]
for fobj_spec in fobj_specs:
fobj = Objects.FileObject()
vobj.append(fobj)
fobj.filename = fobj_spec[0]
fobj.alloc = True
# Naming convention for this sample - the .bin files are virtual files that reference a region outside of the file system.
if fobj.filename == "fragmented_partially_recoverable_directory":
fobj.name_type = "d"
elif fobj.filename.endswith(".bin"):
fobj.name_type = "v"
else:
fobj.name_type = "r"
fobj.data_brs = Objects.ByteRuns()
for interval in fobj_spec[1]:
br = Objects.ByteRun()
fobj.data_brs.append(br)
br.img_offset = interval[0]
br.len = interval[1]
fobj.filesize = sum([br.len for br in fobj.data_brs])
dobj.print_dfxml()