def EficheckCollectHashes(self, args):
stderr = b"Unable to collect the hashes"
exec_response = rdf_client_action.ExecuteBinaryResponse(stderr=stderr,
exit_status=-1)
response = rdf_apple_firmware.CollectEfiHashesResponse(
response=exec_response)
return [response]
def EficheckCollectHashes(self, args):
stdout = (
b"01:00:00:00190048:00003c5f:"
b"4d37da42-3a0c-4eda-b9eb-bc0e1db4713b:"
b"03a3fb4ca9b65be048b04e44ab5d1dd8e1af1ca9d1f53a5e96e8ae0125a02bb2")
exec_response = rdf_client_action.ExecuteBinaryResponse(
stdout=stdout, exit_status=0)
response = rdf_apple_firmware.CollectEfiHashesResponse(
eficheck_version="1.9.6",
boot_rom_version="MBP101.B00",
response=exec_response)
return [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)