payload_generator/payload_signer_unittest.cc - aosp/platform/system/update_engine - Git at Google

 //
 // Copyright (C) 2010 The Android Open Source Project
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //      http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
 //

 #include "update_engine/payload_generator/payload_signer.h"

 #include <iterator>
 #include <string>
 #include <vector>

 #include <base/logging.h>
 #include <gtest/gtest.h>

 #include "update_engine/common/hash_calculator.h"
 #include "update_engine/common/test_utils.h"
 #include "update_engine/common/utils.h"
 #include "update_engine/payload_consumer/payload_constants.h"
 #include "update_engine/payload_consumer/payload_verifier.h"
 #include "update_engine/payload_generator/payload_file.h"
 #include "update_engine/update_metadata.pb.h"

 using chromeos_update_engine::test_utils::GetBuildArtifactsPath;
 using std::string;
 using std::vector;

 // Note: the test key was generated with the following command:
 // openssl genrsa -out unittest_key.pem 2048
 // The public-key version is created by the build system.

 namespace chromeos_update_engine {

 const char* kUnittestPrivateKeyPath = "unittest_key.pem";
 const char* kUnittestPublicKeyPath = "unittest_key.pub.pem";
 const char* kUnittestPrivateKey2Path = "unittest_key2.pem";
 const char* kUnittestPublicKey2Path = "unittest_key2.pub.pem";
 const char* kUnittestPrivateKeyRSA4096Path = "unittest_key_RSA4096.pem";
 const char* kUnittestPublicKeyRSA4096Path = "unittest_key_RSA4096.pub.pem";
 const char* kUnittestPrivateKeyECPath = "unittest_key_EC.pem";
 const char* kUnittestPublicKeyECPath = "unittest_key_EC.pub.pem";

 // Some data and its corresponding hash and signature:
 const char kDataToSign[] = "This is some data to sign.";

 // Generated by:
 // echo -n 'This is some data to sign.' | openssl dgst -sha256 -binary |
 //   hexdump -v -e '" " 8/1 "0x%02x, " "\n"'
 const uint8_t kDataHash[] = {0x7a, 0x07, 0xa6, 0x44, 0x08, 0x86, 0x20, 0xa6,
                              0xc1, 0xf8, 0xd9, 0x02, 0x05, 0x63, 0x0d, 0xb7,
                              0xfc, 0x2b, 0xa0, 0xa9, 0x7c, 0x9d, 0x1d, 0x8c,
                              0x01, 0xf5, 0x78, 0x6d, 0xc5, 0x11, 0xb4, 0x06};

 // Generated with openssl 1.0, which at the time of this writing, you need
 // to download and install yourself. Here's my command:
 // echo -n 'This is some data to sign.' | openssl dgst -sha256 -binary |
 //    ~/local/bin/openssl pkeyutl -sign -inkey unittest_key.pem -pkeyopt
 //    digest:sha256 | hexdump -v -e '" " 8/1 "0x%02x, " "\n"'
 const uint8_t kDataSignature[] = {
     0x9f, 0x86, 0x25, 0x8b, 0xf3, 0xcc, 0xe3, 0x95, 0x5f, 0x45, 0x83, 0xb2,
     0x66, 0xf0, 0x2a, 0xcf, 0xb7, 0xaa, 0x52, 0x25, 0x7a, 0xdd, 0x9d, 0x65,
     0xe5, 0xd6, 0x02, 0x4b, 0x37, 0x99, 0x53, 0x06, 0xc2, 0xc9, 0x37, 0x36,
     0x25, 0x62, 0x09, 0x4f, 0x6b, 0x22, 0xf8, 0xb3, 0x89, 0x14, 0x98, 0x1a,
     0xbc, 0x30, 0x90, 0x4a, 0x43, 0xf5, 0xea, 0x2e, 0xf0, 0xa4, 0xba, 0xc3,
     0xa7, 0xa3, 0x44, 0x70, 0xd6, 0xc4, 0x89, 0xd8, 0x45, 0x71, 0xbb, 0xee,
     0x59, 0x87, 0x3d, 0xd5, 0xe5, 0x40, 0x22, 0x3d, 0x73, 0x7e, 0x2a, 0x58,
     0x93, 0x8e, 0xcb, 0x9c, 0xf2, 0xbb, 0x4a, 0xc9, 0xd2, 0x2c, 0x52, 0x42,
     0xb0, 0xd1, 0x13, 0x22, 0xa4, 0x78, 0xc7, 0xc6, 0x3e, 0xf1, 0xdc, 0x4c,
     0x7b, 0x2d, 0x40, 0xda, 0x58, 0xac, 0x4a, 0x11, 0x96, 0x3d, 0xa0, 0x01,
     0xf6, 0x96, 0x74, 0xf6, 0x6c, 0x0c, 0x49, 0x69, 0x4e, 0xc1, 0x7e, 0x9f,
     0x2a, 0x42, 0xdd, 0x15, 0x6b, 0x37, 0x2e, 0x3a, 0xa7, 0xa7, 0x6d, 0x91,
     0x13, 0xe8, 0x59, 0xde, 0xfe, 0x99, 0x07, 0xd9, 0x34, 0x0f, 0x17, 0xb3,
     0x05, 0x4c, 0xd2, 0xc6, 0x82, 0xb7, 0x38, 0x36, 0x63, 0x1d, 0x9e, 0x21,
     0xa6, 0x32, 0xef, 0xf1, 0x65, 0xe6, 0xed, 0x95, 0x25, 0x9b, 0x61, 0xe0,
     0xba, 0x86, 0xa1, 0x7f, 0xf8, 0xa5, 0x4a, 0x32, 0x1f, 0x15, 0x20, 0x8a,
     0x41, 0xc5, 0xb0, 0xd9, 0x4a, 0xda, 0x85, 0xf3, 0xdc, 0xa0, 0x98, 0x5d,
     0x1d, 0x18, 0x9d, 0x2e, 0x42, 0xea, 0x69, 0x13, 0x74, 0x3c, 0x74, 0xf7,
     0x6d, 0x43, 0xb0, 0x63, 0x90, 0xdb, 0x04, 0xd5, 0x05, 0xc9, 0x73, 0x1f,
     0x6c, 0xd6, 0xfa, 0x46, 0x4e, 0x0f, 0x33, 0x58, 0x5b, 0x0d, 0x1b, 0x55,
     0x39, 0xb9, 0x0f, 0x43, 0x37, 0xc0, 0x06, 0x0c, 0x29, 0x93, 0x43, 0xc7,
     0x43, 0xb9, 0xab, 0x7d};

 namespace {
 void SignSampleData(string* out_signature, const vector<string>& private_keys) {
   uint64_t length = 0;
   EXPECT_TRUE(PayloadSigner::SignatureBlobLength(private_keys, &length));
   EXPECT_GT(length, 0U);
   brillo::Blob hash_blob;
   EXPECT_TRUE(HashCalculator::RawHashOfBytes(
       kDataToSign, strlen(kDataToSign), &hash_blob));
   EXPECT_TRUE(
       PayloadSigner::SignHashWithKeys(hash_blob, private_keys, out_signature));
   EXPECT_EQ(length, out_signature->size());
 }
 }  // namespace

 class PayloadSignerTest : public ::testing::Test {
  protected:
   brillo::Blob hash_data_{std::begin(kDataHash), std::end(kDataHash)};
 };

 TEST_F(PayloadSignerTest, SignSimpleTextTest) {
   string signature;
   SignSampleData(&signature, {GetBuildArtifactsPath(kUnittestPrivateKeyPath)});

   // Check the signature itself
   Signatures signatures;
   EXPECT_TRUE(signatures.ParseFromString(signature));
   EXPECT_EQ(1, signatures.signatures_size());
   const Signatures::Signature& sig = signatures.signatures(0);
   const string& sig_data = sig.data();
   ASSERT_EQ(std::size(kDataSignature), sig_data.size());
   for (size_t i = 0; i < std::size(kDataSignature); i++) {
     EXPECT_EQ(kDataSignature[i], static_cast<uint8_t>(sig_data[i]));
   }
 }

 TEST_F(PayloadSignerTest, VerifyAllSignatureTest) {
   string signature;
   SignSampleData(&signature,
                  {GetBuildArtifactsPath(kUnittestPrivateKeyPath),
                   GetBuildArtifactsPath(kUnittestPrivateKey2Path),
                   GetBuildArtifactsPath(kUnittestPrivateKeyRSA4096Path),
                   GetBuildArtifactsPath(kUnittestPrivateKeyECPath)});

   // Either public key should pass the verification.
   for (const auto& path : {kUnittestPublicKeyPath,
                            kUnittestPublicKey2Path,
                            kUnittestPublicKeyRSA4096Path,
                            kUnittestPublicKeyECPath}) {
     string public_key;
     EXPECT_TRUE(utils::ReadFile(GetBuildArtifactsPath(path), &public_key));
     auto payload_verifier = PayloadVerifier::CreateInstance(public_key);
     EXPECT_TRUE(payload_verifier != nullptr);
     EXPECT_TRUE(payload_verifier->VerifySignature(signature, hash_data_));
   }
 }

 TEST_F(PayloadSignerTest, VerifySignatureTest) {
   string signature;
   SignSampleData(&signature, {GetBuildArtifactsPath(kUnittestPrivateKeyPath)});

   string public_key;
   EXPECT_TRUE(utils::ReadFile(GetBuildArtifactsPath(kUnittestPublicKeyPath),
                               &public_key));
   auto payload_verifier = PayloadVerifier::CreateInstance(public_key);
   EXPECT_TRUE(payload_verifier != nullptr);
   EXPECT_TRUE(payload_verifier->VerifySignature(signature, hash_data_));

   // Passing the invalid key should fail the verification.
   public_key.clear();
   EXPECT_TRUE(utils::ReadFile(GetBuildArtifactsPath(kUnittestPublicKey2Path),
                               &public_key));
   payload_verifier = PayloadVerifier::CreateInstance(public_key);
   EXPECT_TRUE(payload_verifier != nullptr);
   EXPECT_FALSE(payload_verifier->VerifySignature(signature, hash_data_));
 }

 TEST_F(PayloadSignerTest, SkipMetadataSignatureTest) {
   ScopedTempFile payload_file("payload.XXXXXX");
   PayloadGenerationConfig config;
   config.version.major = kBrilloMajorPayloadVersion;
   PayloadFile payload;
   EXPECT_TRUE(payload.Init(config));
   uint64_t metadata_size;
   EXPECT_TRUE(payload.WritePayload(
       payload_file.path(), "/dev/null", "", &metadata_size));
   const vector<size_t> sizes = {256};
   brillo::Blob unsigned_payload_hash, unsigned_metadata_hash;
   EXPECT_TRUE(PayloadSigner::HashPayloadForSigning(payload_file.path(),
                                                    sizes,
                                                    &unsigned_payload_hash,
                                                    &unsigned_metadata_hash));
   EXPECT_TRUE(
       payload.WritePayload(payload_file.path(),
                            "/dev/null",
                            GetBuildArtifactsPath(kUnittestPrivateKeyPath),
                            &metadata_size));
   brillo::Blob signed_payload_hash, signed_metadata_hash;
   EXPECT_TRUE(PayloadSigner::HashPayloadForSigning(
       payload_file.path(), sizes, &signed_payload_hash, &signed_metadata_hash));
   EXPECT_EQ(unsigned_payload_hash, signed_payload_hash);
   EXPECT_EQ(unsigned_metadata_hash, signed_metadata_hash);
 }

 TEST_F(PayloadSignerTest, VerifySignedPayloadTest) {
   ScopedTempFile payload_file("payload.XXXXXX");
   PayloadGenerationConfig config;
   config.version.major = kBrilloMajorPayloadVersion;
   PayloadFile payload;
   EXPECT_TRUE(payload.Init(config));
   uint64_t metadata_size;
   EXPECT_TRUE(
       payload.WritePayload(payload_file.path(),
                            "/dev/null",
                            GetBuildArtifactsPath(kUnittestPrivateKeyPath),
                            &metadata_size));
   EXPECT_TRUE(PayloadSigner::VerifySignedPayload(
       payload_file.path(), GetBuildArtifactsPath(kUnittestPublicKeyPath)));
 }

 }  // namespace chromeos_update_engine
	//
	// Copyright (C) 2010 The Android Open Source Project
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// http://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,
	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	// See the License for the specific language governing permissions and
	// limitations under the License.
	//

	#include "update_engine/payload_generator/payload_signer.h"

	#include <iterator>
	#include <string>
	#include <vector>

	#include <base/logging.h>
	#include <gtest/gtest.h>

	#include "update_engine/common/hash_calculator.h"
	#include "update_engine/common/test_utils.h"
	#include "update_engine/common/utils.h"
	#include "update_engine/payload_consumer/payload_constants.h"
	#include "update_engine/payload_consumer/payload_verifier.h"
	#include "update_engine/payload_generator/payload_file.h"
	#include "update_engine/update_metadata.pb.h"

	using chromeos_update_engine::test_utils::GetBuildArtifactsPath;
	using std::string;
	using std::vector;

	// Note: the test key was generated with the following command:
	// openssl genrsa -out unittest_key.pem 2048
	// The public-key version is created by the build system.

	namespace chromeos_update_engine {

	const char* kUnittestPrivateKeyPath = "unittest_key.pem";
	const char* kUnittestPublicKeyPath = "unittest_key.pub.pem";
	const char* kUnittestPrivateKey2Path = "unittest_key2.pem";
	const char* kUnittestPublicKey2Path = "unittest_key2.pub.pem";
	const char* kUnittestPrivateKeyRSA4096Path = "unittest_key_RSA4096.pem";
	const char* kUnittestPublicKeyRSA4096Path = "unittest_key_RSA4096.pub.pem";
	const char* kUnittestPrivateKeyECPath = "unittest_key_EC.pem";
	const char* kUnittestPublicKeyECPath = "unittest_key_EC.pub.pem";

	// Some data and its corresponding hash and signature:
	const char kDataToSign[] = "This is some data to sign.";

	// Generated by:
	// echo -n 'This is some data to sign.' \| openssl dgst -sha256 -binary \|
	// hexdump -v -e '" " 8/1 "0x%02x, " "\n"'
	const uint8_t kDataHash[] = {0x7a, 0x07, 0xa6, 0x44, 0x08, 0x86, 0x20, 0xa6,
	0xc1, 0xf8, 0xd9, 0x02, 0x05, 0x63, 0x0d, 0xb7,
	0xfc, 0x2b, 0xa0, 0xa9, 0x7c, 0x9d, 0x1d, 0x8c,
	0x01, 0xf5, 0x78, 0x6d, 0xc5, 0x11, 0xb4, 0x06};

	// Generated with openssl 1.0, which at the time of this writing, you need
	// to download and install yourself. Here's my command:
	// echo -n 'This is some data to sign.' \| openssl dgst -sha256 -binary \|
	// ~/local/bin/openssl pkeyutl -sign -inkey unittest_key.pem -pkeyopt
	// digest:sha256 \| hexdump -v -e '" " 8/1 "0x%02x, " "\n"'
	const uint8_t kDataSignature[] = {
	0x9f, 0x86, 0x25, 0x8b, 0xf3, 0xcc, 0xe3, 0x95, 0x5f, 0x45, 0x83, 0xb2,
	0x66, 0xf0, 0x2a, 0xcf, 0xb7, 0xaa, 0x52, 0x25, 0x7a, 0xdd, 0x9d, 0x65,
	0xe5, 0xd6, 0x02, 0x4b, 0x37, 0x99, 0x53, 0x06, 0xc2, 0xc9, 0x37, 0x36,
	0x25, 0x62, 0x09, 0x4f, 0x6b, 0x22, 0xf8, 0xb3, 0x89, 0x14, 0x98, 0x1a,
	0xbc, 0x30, 0x90, 0x4a, 0x43, 0xf5, 0xea, 0x2e, 0xf0, 0xa4, 0xba, 0xc3,
	0xa7, 0xa3, 0x44, 0x70, 0xd6, 0xc4, 0x89, 0xd8, 0x45, 0x71, 0xbb, 0xee,
	0x59, 0x87, 0x3d, 0xd5, 0xe5, 0x40, 0x22, 0x3d, 0x73, 0x7e, 0x2a, 0x58,
	0x93, 0x8e, 0xcb, 0x9c, 0xf2, 0xbb, 0x4a, 0xc9, 0xd2, 0x2c, 0x52, 0x42,
	0xb0, 0xd1, 0x13, 0x22, 0xa4, 0x78, 0xc7, 0xc6, 0x3e, 0xf1, 0xdc, 0x4c,
	0x7b, 0x2d, 0x40, 0xda, 0x58, 0xac, 0x4a, 0x11, 0x96, 0x3d, 0xa0, 0x01,
	0xf6, 0x96, 0x74, 0xf6, 0x6c, 0x0c, 0x49, 0x69, 0x4e, 0xc1, 0x7e, 0x9f,
	0x2a, 0x42, 0xdd, 0x15, 0x6b, 0x37, 0x2e, 0x3a, 0xa7, 0xa7, 0x6d, 0x91,
	0x13, 0xe8, 0x59, 0xde, 0xfe, 0x99, 0x07, 0xd9, 0x34, 0x0f, 0x17, 0xb3,
	0x05, 0x4c, 0xd2, 0xc6, 0x82, 0xb7, 0x38, 0x36, 0x63, 0x1d, 0x9e, 0x21,
	0xa6, 0x32, 0xef, 0xf1, 0x65, 0xe6, 0xed, 0x95, 0x25, 0x9b, 0x61, 0xe0,
	0xba, 0x86, 0xa1, 0x7f, 0xf8, 0xa5, 0x4a, 0x32, 0x1f, 0x15, 0x20, 0x8a,
	0x41, 0xc5, 0xb0, 0xd9, 0x4a, 0xda, 0x85, 0xf3, 0xdc, 0xa0, 0x98, 0x5d,
	0x1d, 0x18, 0x9d, 0x2e, 0x42, 0xea, 0x69, 0x13, 0x74, 0x3c, 0x74, 0xf7,
	0x6d, 0x43, 0xb0, 0x63, 0x90, 0xdb, 0x04, 0xd5, 0x05, 0xc9, 0x73, 0x1f,
	0x6c, 0xd6, 0xfa, 0x46, 0x4e, 0x0f, 0x33, 0x58, 0x5b, 0x0d, 0x1b, 0x55,
	0x39, 0xb9, 0x0f, 0x43, 0x37, 0xc0, 0x06, 0x0c, 0x29, 0x93, 0x43, 0xc7,
	0x43, 0xb9, 0xab, 0x7d};

	namespace {
	void SignSampleData(string* out_signature, const vector<string>& private_keys) {
	uint64_t length = 0;
	EXPECT_TRUE(PayloadSigner::SignatureBlobLength(private_keys, &length));
	EXPECT_GT(length, 0U);
	brillo::Blob hash_blob;
	EXPECT_TRUE(HashCalculator::RawHashOfBytes(
	kDataToSign, strlen(kDataToSign), &hash_blob));
	EXPECT_TRUE(
	PayloadSigner::SignHashWithKeys(hash_blob, private_keys, out_signature));
	EXPECT_EQ(length, out_signature->size());
	}
	} // namespace

	class PayloadSignerTest : public ::testing::Test {
	protected:
	brillo::Blob hash_data_{std::begin(kDataHash), std::end(kDataHash)};
	};

	TEST_F(PayloadSignerTest, SignSimpleTextTest) {
	string signature;
	SignSampleData(&signature, {GetBuildArtifactsPath(kUnittestPrivateKeyPath)});

	// Check the signature itself
	Signatures signatures;
	EXPECT_TRUE(signatures.ParseFromString(signature));
	EXPECT_EQ(1, signatures.signatures_size());
	const Signatures::Signature& sig = signatures.signatures(0);
	const string& sig_data = sig.data();
	ASSERT_EQ(std::size(kDataSignature), sig_data.size());
	for (size_t i = 0; i < std::size(kDataSignature); i++) {
	EXPECT_EQ(kDataSignature[i], static_cast<uint8_t>(sig_data[i]));
	}
	}

	TEST_F(PayloadSignerTest, VerifyAllSignatureTest) {
	string signature;
	SignSampleData(&signature,
	{GetBuildArtifactsPath(kUnittestPrivateKeyPath),
	GetBuildArtifactsPath(kUnittestPrivateKey2Path),
	GetBuildArtifactsPath(kUnittestPrivateKeyRSA4096Path),
	GetBuildArtifactsPath(kUnittestPrivateKeyECPath)});

	// Either public key should pass the verification.
	for (const auto& path : {kUnittestPublicKeyPath,
	kUnittestPublicKey2Path,
	kUnittestPublicKeyRSA4096Path,
	kUnittestPublicKeyECPath}) {
	string public_key;
	EXPECT_TRUE(utils::ReadFile(GetBuildArtifactsPath(path), &public_key));
	auto payload_verifier = PayloadVerifier::CreateInstance(public_key);
	EXPECT_TRUE(payload_verifier != nullptr);
	EXPECT_TRUE(payload_verifier->VerifySignature(signature, hash_data_));
	}
	}

	TEST_F(PayloadSignerTest, VerifySignatureTest) {
	string signature;
	SignSampleData(&signature, {GetBuildArtifactsPath(kUnittestPrivateKeyPath)});

	string public_key;
	EXPECT_TRUE(utils::ReadFile(GetBuildArtifactsPath(kUnittestPublicKeyPath),
	&public_key));
	auto payload_verifier = PayloadVerifier::CreateInstance(public_key);
	EXPECT_TRUE(payload_verifier != nullptr);
	EXPECT_TRUE(payload_verifier->VerifySignature(signature, hash_data_));

	// Passing the invalid key should fail the verification.
	public_key.clear();
	EXPECT_TRUE(utils::ReadFile(GetBuildArtifactsPath(kUnittestPublicKey2Path),
	&public_key));
	payload_verifier = PayloadVerifier::CreateInstance(public_key);
	EXPECT_TRUE(payload_verifier != nullptr);
	EXPECT_FALSE(payload_verifier->VerifySignature(signature, hash_data_));
	}

	TEST_F(PayloadSignerTest, SkipMetadataSignatureTest) {
	ScopedTempFile payload_file("payload.XXXXXX");
	PayloadGenerationConfig config;
	config.version.major = kBrilloMajorPayloadVersion;
	PayloadFile payload;
	EXPECT_TRUE(payload.Init(config));
	uint64_t metadata_size;
	EXPECT_TRUE(payload.WritePayload(
	payload_file.path(), "/dev/null", "", &metadata_size));
	const vector<size_t> sizes = {256};
	brillo::Blob unsigned_payload_hash, unsigned_metadata_hash;
	EXPECT_TRUE(PayloadSigner::HashPayloadForSigning(payload_file.path(),
	sizes,
	&unsigned_payload_hash,
	&unsigned_metadata_hash));
	EXPECT_TRUE(
	payload.WritePayload(payload_file.path(),
	"/dev/null",
	GetBuildArtifactsPath(kUnittestPrivateKeyPath),
	&metadata_size));
	brillo::Blob signed_payload_hash, signed_metadata_hash;
	EXPECT_TRUE(PayloadSigner::HashPayloadForSigning(
	payload_file.path(), sizes, &signed_payload_hash, &signed_metadata_hash));
	EXPECT_EQ(unsigned_payload_hash, signed_payload_hash);
	EXPECT_EQ(unsigned_metadata_hash, signed_metadata_hash);
	}

	TEST_F(PayloadSignerTest, VerifySignedPayloadTest) {
	ScopedTempFile payload_file("payload.XXXXXX");
	PayloadGenerationConfig config;
	config.version.major = kBrilloMajorPayloadVersion;
	PayloadFile payload;
	EXPECT_TRUE(payload.Init(config));
	uint64_t metadata_size;
	EXPECT_TRUE(
	payload.WritePayload(payload_file.path(),
	"/dev/null",
	GetBuildArtifactsPath(kUnittestPrivateKeyPath),
	&metadata_size));
	EXPECT_TRUE(PayloadSigner::VerifySignedPayload(
	payload_file.path(), GetBuildArtifactsPath(kUnittestPublicKeyPath)));
	}

	} // namespace chromeos_update_engine