| // |
| // 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 <string> |
| #include <vector> |
| |
| #include <base/logging.h> |
| #include <gtest/gtest.h> |
| |
| #include "update_engine/common/hash_calculator.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 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"; |
| |
| // 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(brillo::Blob* out_signature_blob, |
| const vector<string>& private_keys) { |
| brillo::Blob data_blob(std::begin(kDataToSign), |
| std::begin(kDataToSign) + strlen(kDataToSign)); |
| uint64_t length = 0; |
| EXPECT_TRUE(PayloadSigner::SignatureBlobLength(private_keys, &length)); |
| EXPECT_GT(length, 0); |
| brillo::Blob hash_blob; |
| EXPECT_TRUE(HashCalculator::RawHashOfBytes(data_blob.data(), |
| data_blob.size(), |
| &hash_blob)); |
| EXPECT_TRUE(PayloadSigner::SignHashWithKeys( |
| hash_blob, |
| private_keys, |
| out_signature_blob)); |
| EXPECT_EQ(length, out_signature_blob->size()); |
| } |
| } // namespace |
| |
| class PayloadSignerTest : public ::testing::Test { |
| protected: |
| void SetUp() override { |
| PayloadVerifier::PadRSA2048SHA256Hash(&padded_hash_data_); |
| } |
| |
| void DoWriteAndLoadPayloadTest(const PayloadGenerationConfig& config) { |
| PayloadFile payload; |
| payload.Init(config); |
| string payload_path; |
| EXPECT_TRUE(utils::MakeTempFile("payload.XXXXXX", &payload_path, nullptr)); |
| ScopedPathUnlinker payload_path_unlinker(payload_path); |
| uint64_t metadata_size; |
| EXPECT_TRUE( |
| payload.WritePayload(payload_path, "/dev/null", "", &metadata_size)); |
| brillo::Blob payload_blob; |
| DeltaArchiveManifest manifest; |
| uint64_t load_metadata_size, load_major_version; |
| EXPECT_TRUE(PayloadSigner::LoadPayload(payload_path, &payload_blob, |
| &manifest, &load_major_version, &load_metadata_size, nullptr)); |
| EXPECT_EQ(utils::FileSize(payload_path), payload_blob.size()); |
| EXPECT_EQ(config.major_version, load_major_version); |
| EXPECT_EQ(metadata_size, load_metadata_size); |
| } |
| |
| brillo::Blob padded_hash_data_{std::begin(kDataHash), std::end(kDataHash)}; |
| }; |
| |
| TEST_F(PayloadSignerTest, LoadPayloadV1Test) { |
| PayloadGenerationConfig config; |
| config.major_version = kChromeOSMajorPayloadVersion; |
| DoWriteAndLoadPayloadTest(config); |
| } |
| |
| TEST_F(PayloadSignerTest, LoadPayloadV2Test) { |
| PayloadGenerationConfig config; |
| config.major_version = kBrilloMajorPayloadVersion; |
| DoWriteAndLoadPayloadTest(config); |
| } |
| |
| TEST_F(PayloadSignerTest, SignSimpleTextTest) { |
| brillo::Blob signature_blob; |
| SignSampleData(&signature_blob, {kUnittestPrivateKeyPath}); |
| |
| // Check the signature itself |
| Signatures signatures; |
| EXPECT_TRUE(signatures.ParseFromArray(signature_blob.data(), |
| signature_blob.size())); |
| EXPECT_EQ(1, signatures.signatures_size()); |
| const Signatures_Signature& signature = signatures.signatures(0); |
| EXPECT_EQ(1, signature.version()); |
| const string sig_data = signature.data(); |
| ASSERT_EQ(arraysize(kDataSignature), sig_data.size()); |
| for (size_t i = 0; i < arraysize(kDataSignature); i++) { |
| EXPECT_EQ(kDataSignature[i], static_cast<uint8_t>(sig_data[i])); |
| } |
| } |
| |
| TEST_F(PayloadSignerTest, VerifyAllSignatureTest) { |
| brillo::Blob signature_blob; |
| SignSampleData(&signature_blob, |
| {kUnittestPrivateKeyPath, kUnittestPrivateKey2Path}); |
| |
| // Either public key should pass the verification. |
| EXPECT_TRUE(PayloadVerifier::VerifySignature(signature_blob, |
| kUnittestPublicKeyPath, |
| padded_hash_data_)); |
| EXPECT_TRUE(PayloadVerifier::VerifySignature(signature_blob, |
| kUnittestPublicKey2Path, |
| padded_hash_data_)); |
| } |
| |
| TEST_F(PayloadSignerTest, VerifySignatureTest) { |
| brillo::Blob signature_blob; |
| SignSampleData(&signature_blob, {kUnittestPrivateKeyPath}); |
| |
| EXPECT_TRUE(PayloadVerifier::VerifySignature(signature_blob, |
| kUnittestPublicKeyPath, |
| padded_hash_data_)); |
| // Passing the invalid key should fail the verification. |
| EXPECT_FALSE(PayloadVerifier::VerifySignature(signature_blob, |
| kUnittestPublicKey2Path, |
| padded_hash_data_)); |
| } |
| |
| TEST_F(PayloadSignerTest, SkipMetadataSignatureTest) { |
| string payload_path; |
| EXPECT_TRUE(utils::MakeTempFile("payload.XXXXXX", &payload_path, nullptr)); |
| ScopedPathUnlinker payload_path_unlinker(payload_path); |
| |
| PayloadGenerationConfig config; |
| config.major_version = kBrilloMajorPayloadVersion; |
| PayloadFile payload; |
| EXPECT_TRUE(payload.Init(config)); |
| uint64_t metadata_size; |
| EXPECT_TRUE( |
| payload.WritePayload(payload_path, "/dev/null", "", &metadata_size)); |
| const vector<int> sizes = {256}; |
| brillo::Blob unsigned_payload_hash, unsigned_metadata_hash; |
| EXPECT_TRUE(PayloadSigner::HashPayloadForSigning( |
| payload_path, sizes, &unsigned_payload_hash, &unsigned_metadata_hash)); |
| EXPECT_TRUE(payload.WritePayload( |
| payload_path, "/dev/null", kUnittestPrivateKeyPath, &metadata_size)); |
| brillo::Blob signed_payload_hash, signed_metadata_hash; |
| EXPECT_TRUE(PayloadSigner::HashPayloadForSigning( |
| payload_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) { |
| string payload_path; |
| EXPECT_TRUE(utils::MakeTempFile("payload.XXXXXX", &payload_path, nullptr)); |
| ScopedPathUnlinker payload_path_unlinker(payload_path); |
| |
| PayloadGenerationConfig config; |
| config.major_version = kBrilloMajorPayloadVersion; |
| PayloadFile payload; |
| EXPECT_TRUE(payload.Init(config)); |
| uint64_t metadata_size; |
| EXPECT_TRUE(payload.WritePayload( |
| payload_path, "/dev/null", kUnittestPrivateKeyPath, &metadata_size)); |
| EXPECT_TRUE(PayloadSigner::VerifySignedPayload(payload_path, |
| kUnittestPublicKeyPath)); |
| } |
| |
| } // namespace chromeos_update_engine |