def _GetVersion(self, args):
"""Call eficheck to find out its version."""
res = client_utils_common.Execute(args.cmd_path, ["--version"])
stdout, stderr, exit_status, time_used = res
# If something went wrong, forward the output directly.
if exit_status:
binary_response = rdf_client_action.ExecuteBinaryResponse(
stdout=stdout,
stderr=stderr,
exit_status=exit_status,
time_used=time_used)
self.SendReply(self.out_rdfvalues[0](response=binary_response))
return
return stdout
def _InstallDeb(self, path, args):
cmd = "/usr/bin/dpkg"
cmd_args = ["-i", path]
time_limit = args.time_limit
client_utils_common.Execute(cmd,
cmd_args,
time_limit=time_limit,
bypass_whitelist=True,
daemon=True)
# The installer will run in the background and kill the main process
# so we just wait. If something goes wrong, the nanny will restart the
# service after a short while and the client will come back to life.
time.sleep(1000)
def ProcessFile(self, path, args):
res = client_utils_common.Execute(
path, args.args, args.time_limit, bypass_whitelist=True)
(stdout, stderr, status, time_used) = res
# Limit output to 10MB so our response doesn't get too big.
stdout = stdout[:10 * 1024 * 1024]
stderr = stderr[:10 * 1024 * 1024]
self.SendReply(
rdf_client.ExecuteBinaryResponse(
stdout=stdout,
stderr=stderr,
exit_status=status,
# We have to return microseconds.
time_used=int(1e6 * time_used)))
def Start(cls, command):
cmd = command.cmd
args = command.args
time_limit = command.time_limit
res = client_utils_common.Execute(cmd, args, time_limit)
(stdout, stderr, status, time_used) = res
# Limit output to 10MB so our response doesn't get too big.
stdout = stdout[:10 * 1024 * 1024]
stderr = stderr[:10 * 1024 * 1024]
yield rdf_client.ExecuteResponse(
request=command,
stdout=stdout,
stderr=stderr,
exit_status=status,
# We have to return microseconds.
time_used=int(1e6 * time_used))
def ProcessFile(self, path, args):
cmd = "/usr/sbin/installer"
cmd_args = ["-pkg", path, "-target", "/"]
time_limit = args.time_limit
res = client_utils_common.Execute(
cmd, cmd_args, time_limit=time_limit, bypass_whitelist=True)
(stdout, stderr, status, time_used) = res
# Limit output to 10MB so our response doesn't get too big.
stdout = stdout[:10 * 1024 * 1024]
stderr = stderr[:10 * 1024 * 1024]
self.SendReply(
rdf_client_action.ExecuteBinaryResponse(
stdout=stdout,
stderr=stderr,
exit_status=status,
# We have to return microseconds.
time_used=int(1e6 * time_used)))
def Run(self, args):
"""Use eficheck to extract the binary image of the flash.
Args:
args: EficheckConfig
Returns:
DumpEfiImageResponse
This action executes eficheck multiple times:
* First to get the binary version, using --version.
* Use --save -b firmware.bin to save the image.
"""
eficheck_version = self._GetVersion(args)
if not eficheck_version:
return False
with tempfiles.TemporaryDirectory(cleanup=False) as tmp_dir:
res = client_utils_common.Execute(args.cmd_path,
["--save", "-b", "firmware.bin"],
cwd=tmp_dir.path)
stdout, stderr, exit_status, time_used = res
binary_response = rdf_client_action.ExecuteBinaryResponse(
stdout=stdout,
stderr=stderr,
exit_status=exit_status,
time_used=time_used)
response = rdf_apple_firmware.DumpEfiImageResponse(
eficheck_version=eficheck_version, response=binary_response)
if exit_status:
tmp_dir.cleanup = True
else:
response.path = rdf_paths.PathSpec(
path=os.path.join(tmp_dir.path, "firmware.bin"),
pathtype=rdf_paths.PathSpec.PathType.TMPFILE)
self.SendReply(response)
def Run(self, args):
"""Use eficheck to extract hash files in plaintext.
Args:
args: EficheckConfig
Returns:
CollectEfiHashesResponse
This action executes eficheck multiple times:
* First to get the binary version, using --version.
* Then with the --generate-hashes option. This will create one or more
.ealf files. Each file contains a binary representation of the hashes
extracted from a part of the flash image (e.g, EFI, SEC).
* For each file generated, we use the --show-hashes option to get a
plaintext representation of the hashes. This raw output is sent to the
server which will perform further parsing.
"""
eficheck_version = self._GetVersion(args)
if not eficheck_version:
return False
with tempfiles.TemporaryDirectory() as tmp_dir:
res = client_utils_common.Execute(args.cmd_path,
["--generate-hashes"],
cwd=tmp_dir.path)
stdout, stderr, exit_status, time_used = res
# If something went wrong, forward the output directly.
if exit_status:
binary_response = rdf_client_action.ExecuteBinaryResponse(
stdout=stdout,
stderr=stderr,
exit_status=exit_status,
time_used=time_used)
self.SendReply(
rdf_apple_firmware.CollectEfiHashesResponse(
response=binary_response))
return
# Otherwise, convert all the files generated and forward the output.
for filename in glob.glob(os.path.join(tmp_dir.path, "*.ealf")):
cmd_args = ["--show-hashes", "-h", filename]
# Get the boot rom version from the filename.
basename = os.path.basename(filename)
if not self._FILENAME_RE.match(basename):
continue
boot_rom_version, _ = os.path.splitext(basename)
stdout, stderr, exit_status, time_used = client_utils_common.Execute(
args.cmd_path, cmd_args, bypass_allowlist=True)
binary_response = rdf_client_action.ExecuteBinaryResponse(
stdout=stdout,
stderr=stderr,
exit_status=exit_status,
time_used=time_used)
self.SendReply(
rdf_apple_firmware.CollectEfiHashesResponse(
eficheck_version=eficheck_version,
boot_rom_version=boot_rom_version,
response=binary_response))
tempfiles.DeleteGRRTempFile(filename)