forked from openkylin/platform_build
releasetools: Add Payload class.
This breaks down the current WriteABOTAPackageWithBrilloScript() into
smaller and testable units, which also prepares for the work in
b/35724498.
Bug: 35724498
Test: python -m unittest test_ota_from_target_files
Test: Get identical A/B OTA packages w/ and w/o the CL.
Change-Id: I2ea45ce98e2d2baa58e94fb829b7242f6fe685a7
(cherry picked from commit 036d721812)
This commit is contained in:
Tao Bao
parent
73b6f5d661
commit
40b1882f40
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@ -360,6 +360,122 @@ class PayloadSigner(object):
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return out_file
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class Payload(object):
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"""Manages the creation and the signing of an A/B OTA Payload."""
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PAYLOAD_BIN = 'payload.bin'
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PAYLOAD_PROPERTIES_TXT = 'payload_properties.txt'
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def __init__(self):
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# The place where the output from the subprocess should go.
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self._log_file = sys.stdout if OPTIONS.verbose else subprocess.PIPE
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self.payload_file = None
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self.payload_properties = None
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def Generate(self, target_file, source_file=None, additional_args=None):
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"""Generates a payload from the given target-files zip(s).
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Args:
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target_file: The filename of the target build target-files zip.
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source_file: The filename of the source build target-files zip; or None if
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generating a full OTA.
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additional_args: A list of additional args that should be passed to
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brillo_update_payload script; or None.
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"""
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if additional_args is None:
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additional_args = []
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payload_file = common.MakeTempFile(prefix="payload-", suffix=".bin")
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cmd = ["brillo_update_payload", "generate",
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"--payload", payload_file,
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"--target_image", target_file]
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if source_file is not None:
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cmd.extend(["--source_image", source_file])
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cmd.extend(additional_args)
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p = common.Run(cmd, stdout=self._log_file, stderr=subprocess.STDOUT)
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stdoutdata, _ = p.communicate()
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assert p.returncode == 0, \
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"brillo_update_payload generate failed: {}".format(stdoutdata)
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self.payload_file = payload_file
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self.payload_properties = None
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def Sign(self, payload_signer):
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"""Generates and signs the hashes of the payload and metadata.
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Args:
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payload_signer: A PayloadSigner() instance that serves the signing work.
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Raises:
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AssertionError: On any failure when calling brillo_update_payload script.
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"""
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assert isinstance(payload_signer, PayloadSigner)
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# 1. Generate hashes of the payload and metadata files.
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payload_sig_file = common.MakeTempFile(prefix="sig-", suffix=".bin")
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metadata_sig_file = common.MakeTempFile(prefix="sig-", suffix=".bin")
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cmd = ["brillo_update_payload", "hash",
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"--unsigned_payload", self.payload_file,
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"--signature_size", "256",
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"--metadata_hash_file", metadata_sig_file,
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"--payload_hash_file", payload_sig_file]
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p1 = common.Run(cmd, stdout=self._log_file, stderr=subprocess.STDOUT)
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p1.communicate()
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assert p1.returncode == 0, "brillo_update_payload hash failed"
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# 2. Sign the hashes.
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signed_payload_sig_file = payload_signer.Sign(payload_sig_file)
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signed_metadata_sig_file = payload_signer.Sign(metadata_sig_file)
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# 3. Insert the signatures back into the payload file.
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signed_payload_file = common.MakeTempFile(prefix="signed-payload-",
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suffix=".bin")
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cmd = ["brillo_update_payload", "sign",
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"--unsigned_payload", self.payload_file,
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"--payload", signed_payload_file,
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"--signature_size", "256",
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"--metadata_signature_file", signed_metadata_sig_file,
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"--payload_signature_file", signed_payload_sig_file]
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p1 = common.Run(cmd, stdout=self._log_file, stderr=subprocess.STDOUT)
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p1.communicate()
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assert p1.returncode == 0, "brillo_update_payload sign failed"
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# 4. Dump the signed payload properties.
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properties_file = common.MakeTempFile(prefix="payload-properties-",
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suffix=".txt")
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cmd = ["brillo_update_payload", "properties",
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"--payload", signed_payload_file,
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"--properties_file", properties_file]
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p1 = common.Run(cmd, stdout=self._log_file, stderr=subprocess.STDOUT)
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p1.communicate()
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assert p1.returncode == 0, "brillo_update_payload properties failed"
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if OPTIONS.wipe_user_data:
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with open(properties_file, "a") as f:
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f.write("POWERWASH=1\n")
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self.payload_file = signed_payload_file
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self.payload_properties = properties_file
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def WriteToZip(self, output_zip):
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"""Writes the payload to the given zip.
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Args:
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output_zip: The output ZipFile instance.
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"""
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assert self.payload_file is not None
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assert self.payload_properties is not None
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# Add the signed payload file and properties into the zip. In order to
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# support streaming, we pack them as ZIP_STORED. So these entries can be
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# read directly with the offset and length pairs.
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common.ZipWrite(output_zip, self.payload_file, arcname=Payload.PAYLOAD_BIN,
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compress_type=zipfile.ZIP_STORED)
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common.ZipWrite(output_zip, self.payload_properties,
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arcname=Payload.PAYLOAD_PROPERTIES_TXT,
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compress_type=zipfile.ZIP_STORED)
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def SignOutput(temp_zip_name, output_zip_name):
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pw = OPTIONS.key_passwords[OPTIONS.package_key]
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@ -1122,12 +1238,6 @@ def WriteABOTAPackageWithBrilloScript(target_file, output_file,
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value += ' ' * (expected_length - len(value))
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return value
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# The place where the output from the subprocess should go.
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log_file = sys.stdout if OPTIONS.verbose else subprocess.PIPE
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# Get the PayloadSigner to be used in step 3.
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payload_signer = PayloadSigner()
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# Stage the output zip package for package signing.
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temp_zip_file = tempfile.NamedTemporaryFile()
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output_zip = zipfile.ZipFile(temp_zip_file, "w",
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@ -1143,77 +1253,23 @@ def WriteABOTAPackageWithBrilloScript(target_file, output_file,
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# Metadata to comply with Android OTA package format.
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metadata = GetPackageMetadata(target_info, source_info)
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# 1. Generate payload.
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payload_file = common.MakeTempFile(prefix="payload-", suffix=".bin")
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cmd = ["brillo_update_payload", "generate",
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"--payload", payload_file,
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"--target_image", target_file]
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if source_file is not None:
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cmd.extend(["--source_image", source_file])
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# Generate payload.
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payload = Payload()
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# Enforce a max timestamp this payload can be applied on top of.
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if OPTIONS.downgrade:
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max_timestamp = source_info.GetBuildProp("ro.build.date.utc")
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else:
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max_timestamp = metadata["post-timestamp"]
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cmd.extend(["--max_timestamp", max_timestamp])
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p1 = common.Run(cmd, stdout=log_file, stderr=subprocess.STDOUT)
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p1.communicate()
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assert p1.returncode == 0, "brillo_update_payload generate failed"
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additional_args = ["--max_timestamp", max_timestamp]
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# 2. Generate hashes of the payload and metadata files.
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payload_sig_file = common.MakeTempFile(prefix="sig-", suffix=".bin")
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metadata_sig_file = common.MakeTempFile(prefix="sig-", suffix=".bin")
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cmd = ["brillo_update_payload", "hash",
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"--unsigned_payload", payload_file,
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"--signature_size", "256",
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"--metadata_hash_file", metadata_sig_file,
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"--payload_hash_file", payload_sig_file]
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p1 = common.Run(cmd, stdout=log_file, stderr=subprocess.STDOUT)
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p1.communicate()
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assert p1.returncode == 0, "brillo_update_payload hash failed"
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payload.Generate(target_file, source_file, additional_args)
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# 3. Sign the hashes and insert them back into the payload file.
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# 3a. Sign the payload hash.
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signed_payload_sig_file = payload_signer.Sign(payload_sig_file)
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# Sign the payload.
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payload.Sign(PayloadSigner())
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# 3b. Sign the metadata hash.
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signed_metadata_sig_file = payload_signer.Sign(metadata_sig_file)
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# 3c. Insert the signatures back into the payload file.
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signed_payload_file = common.MakeTempFile(prefix="signed-payload-",
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suffix=".bin")
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cmd = ["brillo_update_payload", "sign",
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"--unsigned_payload", payload_file,
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"--payload", signed_payload_file,
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"--signature_size", "256",
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"--metadata_signature_file", signed_metadata_sig_file,
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"--payload_signature_file", signed_payload_sig_file]
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p1 = common.Run(cmd, stdout=log_file, stderr=subprocess.STDOUT)
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p1.communicate()
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assert p1.returncode == 0, "brillo_update_payload sign failed"
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# 4. Dump the signed payload properties.
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properties_file = common.MakeTempFile(prefix="payload-properties-",
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suffix=".txt")
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cmd = ["brillo_update_payload", "properties",
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"--payload", signed_payload_file,
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"--properties_file", properties_file]
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p1 = common.Run(cmd, stdout=log_file, stderr=subprocess.STDOUT)
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p1.communicate()
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assert p1.returncode == 0, "brillo_update_payload properties failed"
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if OPTIONS.wipe_user_data:
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with open(properties_file, "a") as f:
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f.write("POWERWASH=1\n")
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# Add the signed payload file and properties into the zip. In order to
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# support streaming, we pack payload.bin, payload_properties.txt and
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# care_map.txt as ZIP_STORED. So these entries can be read directly with
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# the offset and length pairs.
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common.ZipWrite(output_zip, signed_payload_file, arcname="payload.bin",
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compress_type=zipfile.ZIP_STORED)
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common.ZipWrite(output_zip, properties_file,
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arcname="payload_properties.txt",
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compress_type=zipfile.ZIP_STORED)
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# Write the payload into output zip.
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payload.WriteToZip(output_zip)
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# If dm-verity is supported for the device, copy contents of care_map
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# into A/B OTA package.
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@ -1224,6 +1280,8 @@ def WriteABOTAPackageWithBrilloScript(target_file, output_file,
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namelist = target_zip.namelist()
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if care_map_path in namelist:
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care_map_data = target_zip.read(care_map_path)
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# In order to support streaming, care_map.txt needs to be packed as
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# ZIP_STORED.
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common.ZipWriteStr(output_zip, "care_map.txt", care_map_data,
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compress_type=zipfile.ZIP_STORED)
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else:
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@ -15,12 +15,14 @@
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#
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import copy
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import os
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import os.path
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import unittest
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import zipfile
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import common
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from ota_from_target_files import (
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_LoadOemDicts, BuildInfo, GetPackageMetadata, PayloadSigner,
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_LoadOemDicts, BuildInfo, GetPackageMetadata, Payload, PayloadSigner,
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WriteFingerprintAssertion)
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@ -564,3 +566,157 @@ class PayloadSignerTest(unittest.TestCase):
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verify_file = os.path.join(self.testdata_dir, self.SIGNED_SIGFILE)
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self._assertFilesEqual(verify_file, signed_file)
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class PayloadTest(unittest.TestCase):
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def setUp(self):
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self.testdata_dir = get_testdata_dir()
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self.assertTrue(os.path.exists(self.testdata_dir))
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common.OPTIONS.wipe_user_data = False
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common.OPTIONS.payload_signer = None
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common.OPTIONS.payload_signer_args = None
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common.OPTIONS.package_key = os.path.join(self.testdata_dir, 'testkey')
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common.OPTIONS.key_passwords = {
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common.OPTIONS.package_key : None,
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}
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def tearDown(self):
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common.Cleanup()
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@staticmethod
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def _construct_target_files():
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target_files = common.MakeTempFile(prefix='target_files-', suffix='.zip')
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with zipfile.ZipFile(target_files, 'w') as target_files_zip:
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# META/update_engine_config.txt
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target_files_zip.writestr(
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'META/update_engine_config.txt',
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"PAYLOAD_MAJOR_VERSION=2\nPAYLOAD_MINOR_VERSION=4\n")
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# META/ab_partitions.txt
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ab_partitions = ['boot', 'system', 'vendor']
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target_files_zip.writestr(
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'META/ab_partitions.txt',
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'\n'.join(ab_partitions))
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# Create dummy images for each of them.
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for partition in ab_partitions:
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target_files_zip.writestr('IMAGES/' + partition + '.img',
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os.urandom(len(partition)))
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return target_files
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def _create_payload_full(self):
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target_file = self._construct_target_files()
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payload = Payload()
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payload.Generate(target_file)
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return payload
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def _create_payload_incremental(self):
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target_file = self._construct_target_files()
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source_file = self._construct_target_files()
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payload = Payload()
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payload.Generate(target_file, source_file)
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return payload
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def test_Generate_full(self):
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payload = self._create_payload_full()
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self.assertTrue(os.path.exists(payload.payload_file))
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def test_Generate_incremental(self):
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payload = self._create_payload_incremental()
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self.assertTrue(os.path.exists(payload.payload_file))
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def test_Generate_additionalArgs(self):
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target_file = self._construct_target_files()
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source_file = self._construct_target_files()
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payload = Payload()
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# This should work the same as calling payload.Generate(target_file,
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# source_file).
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payload.Generate(
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target_file, additional_args=["--source_image", source_file])
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self.assertTrue(os.path.exists(payload.payload_file))
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def test_Generate_invalidInput(self):
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target_file = self._construct_target_files()
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common.ZipDelete(target_file, 'IMAGES/vendor.img')
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payload = Payload()
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self.assertRaises(AssertionError, payload.Generate, target_file)
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def test_Sign_full(self):
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payload = self._create_payload_full()
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payload.Sign(PayloadSigner())
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output_file = common.MakeTempFile(suffix='.zip')
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with zipfile.ZipFile(output_file, 'w') as output_zip:
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payload.WriteToZip(output_zip)
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import check_ota_package_signature
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check_ota_package_signature.VerifyAbOtaPayload(
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os.path.join(self.testdata_dir, 'testkey.x509.pem'),
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output_file)
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def test_Sign_incremental(self):
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payload = self._create_payload_incremental()
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payload.Sign(PayloadSigner())
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output_file = common.MakeTempFile(suffix='.zip')
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with zipfile.ZipFile(output_file, 'w') as output_zip:
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payload.WriteToZip(output_zip)
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import check_ota_package_signature
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check_ota_package_signature.VerifyAbOtaPayload(
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os.path.join(self.testdata_dir, 'testkey.x509.pem'),
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output_file)
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def test_Sign_withDataWipe(self):
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common.OPTIONS.wipe_user_data = True
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payload = self._create_payload_full()
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payload.Sign(PayloadSigner())
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with open(payload.payload_properties) as properties_fp:
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self.assertIn("POWERWASH=1", properties_fp.read())
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def test_Sign_badSigner(self):
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"""Tests that signing failure can be captured."""
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payload = self._create_payload_full()
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payload_signer = PayloadSigner()
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payload_signer.signer_args.append('bad-option')
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self.assertRaises(AssertionError, payload.Sign, payload_signer)
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def test_WriteToZip(self):
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payload = self._create_payload_full()
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payload.Sign(PayloadSigner())
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output_file = common.MakeTempFile(suffix='.zip')
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with zipfile.ZipFile(output_file, 'w') as output_zip:
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payload.WriteToZip(output_zip)
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with zipfile.ZipFile(output_file) as verify_zip:
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# First make sure we have the essential entries.
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namelist = verify_zip.namelist()
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self.assertIn(Payload.PAYLOAD_BIN, namelist)
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self.assertIn(Payload.PAYLOAD_PROPERTIES_TXT, namelist)
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# Then assert these entries are stored.
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for entry_info in verify_zip.infolist():
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if entry_info.filename not in (Payload.PAYLOAD_BIN,
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Payload.PAYLOAD_PROPERTIES_TXT):
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continue
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self.assertEqual(zipfile.ZIP_STORED, entry_info.compress_type)
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def test_WriteToZip_unsignedPayload(self):
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"""Unsigned payloads should not be allowed to be written to zip."""
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payload = self._create_payload_full()
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output_file = common.MakeTempFile(suffix='.zip')
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with zipfile.ZipFile(output_file, 'w') as output_zip:
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self.assertRaises(AssertionError, payload.WriteToZip, output_zip)
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# Also test with incremental payload.
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payload = self._create_payload_incremental()
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output_file = common.MakeTempFile(suffix='.zip')
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with zipfile.ZipFile(output_file, 'w') as output_zip:
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self.assertRaises(AssertionError, payload.WriteToZip, output_zip)
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