def CheckFreeGRRTempSpace(self, _):
"""Mock out the driver loading code to pass the memory image."""
path = tempfiles.GetDefaultGRRTempDirectory()
reply = rdf_client.DiskUsage(path=path,
total=10 * 1024 * 1024 * 1024,
used=5 * 1024 * 1024 * 1024,
free=5 * 1024 * 1024 * 1024)
return [reply]
def _SaveSignatureShard(self, scan_request):
"""Writes a YaraSignatureShard received from the server to disk.
Args:
scan_request: The YaraProcessScanRequest sent by the server.
Returns:
The full Yara signature, if all shards have been received. Otherwise,
None is returned.
"""
def GetShardName(shard_index, num_shards):
return "shard_%02d_of_%02d" % (shard_index, num_shards)
signature_dir = os.path.join(tempfiles.GetDefaultGRRTempDirectory(),
"Sig_%s" % self.session_id.Basename())
# Create the temporary directory and set permissions, if it does not exist.
tempfiles.EnsureTempDirIsSane(signature_dir)
shard_path = os.path.join(
signature_dir,
GetShardName(scan_request.signature_shard.index,
scan_request.num_signature_shards))
with io.open(shard_path, "wb") as f:
f.write(scan_request.signature_shard.payload)
dir_contents = set(os.listdir(signature_dir))
all_shards = [
GetShardName(i, scan_request.num_signature_shards)
for i in range(scan_request.num_signature_shards)
]
if dir_contents.issuperset(all_shards):
# All shards have been received; delete the temporary directory and
# return the full signature.
full_signature = io.BytesIO()
for shard in all_shards:
with io.open(os.path.join(signature_dir, shard), "rb") as f:
full_signature.write(f.read())
shutil.rmtree(signature_dir, ignore_errors=True)
return full_signature.getvalue().decode("utf-8")
else:
return None
def cleanup():
shutil.rmtree(tempfiles.GetDefaultGRRTempDirectory())
def tearDown(self):
super(GRRTempFileTestFilename, self).tearDown()
# The actual GRR temp dir.
os.rmdir(tempfiles.GetDefaultGRRTempDirectory())
self.tempdir_overrider.Stop()
