def EXTRACT_EMBEDDED(s, buff):
EXTRACT_FILES = {}
CHILD_BUFF = {}
stream = StringInputStream(buff)
subfile = SearchSubfile(stream)
subfile.loadParsers(categories=None, parser_ids=None)
subfile.stats = {}
subfile.next_offset = None
counter = 0
last_start = 0
last_end = 0
while subfile.current_offset < subfile.size:
subfile.datarate.update(subfile.current_offset)
for offset, parser in subfile.findMagic(subfile.current_offset):
# Don't care about extracting the base file, just what's within it
# False positives often return sizes exceeding the size of the file
# they also may not even posess a content size at all, weed em out
if (
offset != 0
and parser.content_size != subfile.size
and parser.content_size < subfile.size
and parser.content_size
):
start = offset // 8
end = start + parser.content_size // 8
# We want to make sure we aren't pulling sub files out of ones
# we are already extracting, we will be doing that later anyway
# when the module is run again on the 'buffer' returned key value
if start >= last_end:
EXTRACT_FILES["Object_%s" % counter] = OrderedDict(
[
("Start", "%s bytes" % start),
("End", "%s bytes" % end),
("Description", parser.description),
("Buffer", buff[start:end]),
]
)
counter += 1
last_start = start
last_end = end
subfile.current_offset += subfile.slice_size
if subfile.next_offset:
subfile.current_offset = max(subfile.current_offset, subfile.next_offset)
subfile.current_offset = min(subfile.current_offset, subfile.size)
return EXTRACT_FILES
def EXTRACT_EMBEDDED(s, buff):
EXTRACT_FILES = {}
CHILD_BUFF = {}
stream = StringInputStream(buff)
subfile = SearchSubfile(stream)
subfile.loadParsers(categories=None, parser_ids=None)
subfile.stats = {}
subfile.next_offset = None
counter = 0
last_start = 0
last_end = 0
while subfile.current_offset < subfile.size:
subfile.datarate.update(subfile.current_offset)
for offset, parser in subfile.findMagic(subfile.current_offset):
# Don't care about extracting the base file, just what's within it
# False positives often return sizes exceeding the size of the file
# they also may not even posess a content size at all, weed em out
if offset != 0 and parser.content_size != subfile.size \
and parser.content_size < subfile.size and parser.content_size:
start = offset // 8
end = start + parser.content_size // 8
# We want to make sure we aren't pulling sub files out of ones
# we are already extracting, we will be doing that later anyway
# when the module is run again on the 'buffer' returned key value
if start >= last_end:
EXTRACT_FILES['Object_%s' % counter] = OrderedDict([
('Start', '%s bytes' % start),
('End', '%s bytes' % end),
('Description', parser.description),
('Buffer', buff[start:end])
])
counter += 1
last_start = start
last_end = end
subfile.current_offset += subfile.slice_size
if subfile.next_offset:
subfile.current_offset = max(subfile.current_offset,
subfile.next_offset)
subfile.current_offset = min(subfile.current_offset, subfile.size)
return EXTRACT_FILES
def file_subfiles(filename):
if filename and filename != "":
offset, size, memorylimit, filemaxsize = 0, 999999, 50 * 1024 * 1024, 100 * 1024 * 1024
stream = FileInputStream(unicodeFilename(filename),
real_filename=filename)
subfile = SearchSubfile(stream, offset, size)
try:
subfile.loadParsers()
subfile.stats = {}
subfile.verbose = False
subfile.next_offset = None
subfiles = []
while subfile.current_offset < subfile.size:
_ = subfile.datarate.update(subfile.current_offset)
for offset, parser in subfile.findMagic(
subfile.current_offset):
try:
size = parser.content_size // 8 if parser.content_size else None
except Exception as ex:
size = None
try:
description = parser.description if not (
parser.content_size
) or parser.content_size // 8 < filemaxsize else parser.__class__.__name__
except Exception as ex:
description = None
offset = offset // 8
# skip the first subfile
# as its the original file itself
if offset == 0:
continue
with open(filename, "rb") as fo:
filedata = fo.read()
mimetype = data_mimetype(
filedata[offset:offset + size]
) if offset > 0 and size and size > 0 else None
md5 = data_hashes(
filedata[offset:offset + size],
"md5") if offset >= 0 and size > 0 else None
sha256 = data_hashes(
filedata[offset:offset + size],
"sha256") if (offset or offset == 0) and size else None
ssdeep = data_hashes(
filedata[offset:offset + size],
"ssdeep") if (offset or offset == 0) and size else None
subfiles.append({
"offset": offset,
"size": size,
"mimetype": mimetype,
"description": description,
"hashes": {
"md5": md5,
"sha256": sha256,
"ssdeep": ssdeep
}
})
subfile.current_offset += subfile.slice_size
if subfile.next_offset:
subfile.current_offset = max(subfile.current_offset,
subfile.next_offset)
subfile.current_offset = min(subfile.current_offset,
subfile.size)
except MemoryError:
error("[!] Memory error!")
return subfiles
