| // Copyright (c) 2012 The Chromium OS Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include <sys/mount.h> |
| #include <inttypes.h> |
| |
| #include <algorithm> |
| #include <string> |
| #include <vector> |
| |
| #include <base/file_util.h> |
| #include <base/memory/scoped_ptr.h> |
| #include <base/string_util.h> |
| #include <base/stringprintf.h> |
| #include <google/protobuf/repeated_field.h> |
| #include <gtest/gtest.h> |
| |
| #include "update_engine/delta_diff_generator.h" |
| #include "update_engine/delta_performer.h" |
| #include "update_engine/extent_ranges.h" |
| #include "update_engine/full_update_generator.h" |
| #include "update_engine/graph_types.h" |
| #include "update_engine/mock_system_state.h" |
| #include "update_engine/payload_signer.h" |
| #include "update_engine/prefs_mock.h" |
| #include "update_engine/test_utils.h" |
| #include "update_engine/update_metadata.pb.h" |
| #include "update_engine/utils.h" |
| |
| namespace chromeos_update_engine { |
| |
| using std::min; |
| using std::string; |
| using std::vector; |
| using testing::_; |
| using testing::Return; |
| |
| extern const char* kUnittestPrivateKeyPath; |
| extern const char* kUnittestPublicKeyPath; |
| extern const char* kUnittestPrivateKey2Path; |
| extern const char* kUnittestPublicKey2Path; |
| |
| static const size_t kBlockSize = 4096; |
| static const char* kBogusMetadataSignature1 = "awSFIUdUZz2VWFiR+ku0Pj00V7bPQPQFYQSXjEXr3vaw3TE4xHV5CraY3/YrZpBvJ5z4dSBskoeuaO1TNC/S6E05t+yt36tE4Fh79tMnJ/z9fogBDXWgXLEUyG78IEQrYH6/eBsQGT2RJtBgXIXbZ9W+5G9KmGDoPOoiaeNsDuqHiBc/58OFsrxskH8E6vMSBmMGGk82mvgzic7ApcoURbCGey1b3Mwne/hPZ/bb9CIyky8Og9IfFMdL2uAweOIRfjoTeLYZpt+WN65Vu7jJ0cQN8e1y+2yka5112wpRf/LLtPgiAjEZnsoYpLUd7CoVpLRtClp97kN2+tXGNBQqkA=="; |
| |
| static const int kDefaultKernelSize = 4096; // Something small for a test |
| static const char* kNewDataString = "This is new data."; |
| |
| namespace { |
| struct DeltaState { |
| string a_img; |
| string b_img; |
| int image_size; |
| |
| string delta_path; |
| uint64_t metadata_size; |
| |
| string old_kernel; |
| vector<char> old_kernel_data; |
| |
| string new_kernel; |
| vector<char> new_kernel_data; |
| |
| // The in-memory copy of delta file. |
| vector<char> delta; |
| |
| // The mock system state object with which we initialize the |
| // delta performer. |
| MockSystemState mock_system_state; |
| }; |
| |
| enum SignatureTest { |
| kSignatureNone, // No payload signing. |
| kSignatureGenerator, // Sign the payload at generation time. |
| kSignatureGenerated, // Sign the payload after it's generated. |
| kSignatureGeneratedShell, // Sign the generated payload through shell cmds. |
| kSignatureGeneratedShellBadKey, // Sign with a bad key through shell cmds. |
| kSignatureGeneratedShellRotateCl1, // Rotate key, test client v1 |
| kSignatureGeneratedShellRotateCl2, // Rotate key, test client v2 |
| }; |
| |
| // Different options that determine what we should fill into the |
| // install_plan.metadata_signature to simulate the contents received in the |
| // Omaha response. |
| enum MetadataSignatureTest { |
| kEmptyMetadataSignature, |
| kInvalidMetadataSignature, |
| kValidMetadataSignature, |
| }; |
| |
| enum OperationHashTest { |
| kInvalidOperationData, |
| kValidOperationData, |
| }; |
| |
| } // namespace {} |
| |
| static void CompareFilesByBlock(const string& a_file, const string& b_file) { |
| vector<char> a_data, b_data; |
| EXPECT_TRUE(utils::ReadFile(a_file, &a_data)) << "file failed: " << a_file; |
| EXPECT_TRUE(utils::ReadFile(b_file, &b_data)) << "file failed: " << b_file; |
| |
| EXPECT_EQ(a_data.size(), b_data.size()); |
| EXPECT_EQ(0, a_data.size() % kBlockSize); |
| for (size_t i = 0; i < a_data.size(); i += kBlockSize) { |
| EXPECT_EQ(0, i % kBlockSize); |
| vector<char> a_sub(&a_data[i], &a_data[i + kBlockSize]); |
| vector<char> b_sub(&b_data[i], &b_data[i + kBlockSize]); |
| EXPECT_TRUE(a_sub == b_sub) << "Block " << (i/kBlockSize) << " differs"; |
| } |
| } |
| |
| static bool WriteSparseFile(const string& path, off_t size) { |
| int fd = open(path.c_str(), O_CREAT | O_TRUNC | O_WRONLY, 0644); |
| TEST_AND_RETURN_FALSE_ERRNO(fd >= 0); |
| ScopedFdCloser fd_closer(&fd); |
| off_t rc = lseek(fd, size + 1, SEEK_SET); |
| TEST_AND_RETURN_FALSE_ERRNO(rc != static_cast<off_t>(-1)); |
| int return_code = ftruncate(fd, size); |
| TEST_AND_RETURN_FALSE_ERRNO(return_code == 0); |
| return true; |
| } |
| |
| static size_t GetSignatureSize(const string& private_key_path) { |
| const vector<char> data(1, 'x'); |
| vector<char> hash; |
| EXPECT_TRUE(OmahaHashCalculator::RawHashOfData(data, &hash)); |
| vector<char> signature; |
| EXPECT_TRUE(PayloadSigner::SignHash(hash, |
| private_key_path, |
| &signature)); |
| return signature.size(); |
| } |
| |
| static void SignGeneratedPayload(const string& payload_path, |
| uint64_t* out_metadata_size) { |
| int signature_size = GetSignatureSize(kUnittestPrivateKeyPath); |
| vector<char> hash; |
| ASSERT_TRUE(PayloadSigner::HashPayloadForSigning( |
| payload_path, |
| vector<int>(1, signature_size), |
| &hash)); |
| vector<char> signature; |
| ASSERT_TRUE(PayloadSigner::SignHash(hash, |
| kUnittestPrivateKeyPath, |
| &signature)); |
| ASSERT_TRUE(PayloadSigner::AddSignatureToPayload( |
| payload_path, |
| vector<vector<char> >(1, signature), |
| payload_path, |
| out_metadata_size)); |
| EXPECT_TRUE(PayloadSigner::VerifySignedPayload( |
| payload_path, |
| kUnittestPublicKeyPath, |
| kSignatureMessageOriginalVersion)); |
| } |
| |
| static void SignGeneratedShellPayload(SignatureTest signature_test, |
| const string& payload_path) { |
| string private_key_path = kUnittestPrivateKeyPath; |
| if (signature_test == kSignatureGeneratedShellBadKey) { |
| ASSERT_TRUE(utils::MakeTempFile("/tmp/key.XXXXXX", |
| &private_key_path, |
| NULL)); |
| } else { |
| ASSERT_TRUE(signature_test == kSignatureGeneratedShell || |
| signature_test == kSignatureGeneratedShellRotateCl1 || |
| signature_test == kSignatureGeneratedShellRotateCl2); |
| } |
| ScopedPathUnlinker key_unlinker(private_key_path); |
| key_unlinker.set_should_remove(signature_test == |
| kSignatureGeneratedShellBadKey); |
| // Generates a new private key that will not match the public key. |
| if (signature_test == kSignatureGeneratedShellBadKey) { |
| LOG(INFO) << "Generating a mismatched private key."; |
| ASSERT_EQ(0, |
| System(StringPrintf( |
| "openssl genrsa -out %s 2048", |
| private_key_path.c_str()))); |
| } |
| int signature_size = GetSignatureSize(private_key_path); |
| string hash_file; |
| ASSERT_TRUE(utils::MakeTempFile("/tmp/hash.XXXXXX", &hash_file, NULL)); |
| ScopedPathUnlinker hash_unlinker(hash_file); |
| string signature_size_string; |
| if (signature_test == kSignatureGeneratedShellRotateCl1 || |
| signature_test == kSignatureGeneratedShellRotateCl2) |
| signature_size_string = StringPrintf("%d:%d", |
| signature_size, signature_size); |
| else |
| signature_size_string = StringPrintf("%d", signature_size); |
| ASSERT_EQ(0, |
| System(StringPrintf( |
| "./delta_generator -in_file %s -signature_size %s " |
| "-out_hash_file %s", |
| payload_path.c_str(), |
| signature_size_string.c_str(), |
| hash_file.c_str()))); |
| |
| // Pad the hash |
| vector<char> hash; |
| ASSERT_TRUE(utils::ReadFile(hash_file, &hash)); |
| ASSERT_TRUE(PayloadSigner::PadRSA2048SHA256Hash(&hash)); |
| ASSERT_TRUE(WriteFileVector(hash_file, hash)); |
| |
| string sig_file; |
| ASSERT_TRUE(utils::MakeTempFile("/tmp/signature.XXXXXX", &sig_file, NULL)); |
| ScopedPathUnlinker sig_unlinker(sig_file); |
| ASSERT_EQ(0, |
| System(StringPrintf( |
| "openssl rsautl -raw -sign -inkey %s -in %s -out %s", |
| private_key_path.c_str(), |
| hash_file.c_str(), |
| sig_file.c_str()))); |
| string sig_file2; |
| ASSERT_TRUE(utils::MakeTempFile("/tmp/signature.XXXXXX", &sig_file2, NULL)); |
| ScopedPathUnlinker sig2_unlinker(sig_file2); |
| if (signature_test == kSignatureGeneratedShellRotateCl1 || |
| signature_test == kSignatureGeneratedShellRotateCl2) { |
| ASSERT_EQ(0, |
| System(StringPrintf( |
| "openssl rsautl -raw -sign -inkey %s -in %s -out %s", |
| kUnittestPrivateKey2Path, |
| hash_file.c_str(), |
| sig_file2.c_str()))); |
| // Append second sig file to first path |
| sig_file += ":" + sig_file2; |
| } |
| |
| ASSERT_EQ(0, |
| System(StringPrintf( |
| "./delta_generator -in_file %s -signature_file %s " |
| "-out_file %s", |
| payload_path.c_str(), |
| sig_file.c_str(), |
| payload_path.c_str()))); |
| int verify_result = |
| System(StringPrintf( |
| "./delta_generator -in_file %s -public_key %s -public_key_version %d", |
| payload_path.c_str(), |
| signature_test == kSignatureGeneratedShellRotateCl2 ? |
| kUnittestPublicKey2Path : kUnittestPublicKeyPath, |
| signature_test == kSignatureGeneratedShellRotateCl2 ? 2 : 1)); |
| if (signature_test == kSignatureGeneratedShellBadKey) { |
| ASSERT_NE(0, verify_result); |
| } else { |
| ASSERT_EQ(0, verify_result); |
| } |
| } |
| |
| static void GenerateDeltaFile(bool full_kernel, |
| bool full_rootfs, |
| bool noop, |
| SignatureTest signature_test, |
| DeltaState *state) { |
| EXPECT_TRUE(utils::MakeTempFile("/tmp/a_img.XXXXXX", &state->a_img, NULL)); |
| EXPECT_TRUE(utils::MakeTempFile("/tmp/b_img.XXXXXX", &state->b_img, NULL)); |
| CreateExtImageAtPath(state->a_img, NULL); |
| |
| state->image_size = static_cast<int>(utils::FileSize(state->a_img)); |
| |
| // Extend the "partitions" holding the file system a bit. |
| EXPECT_EQ(0, System(base::StringPrintf( |
| "dd if=/dev/zero of=%s seek=%d bs=1 count=1", |
| state->a_img.c_str(), |
| state->image_size + 1024 * 1024 - 1))); |
| EXPECT_EQ(state->image_size + 1024 * 1024, utils::FileSize(state->a_img)); |
| |
| // Make some changes to the A image. |
| { |
| string a_mnt; |
| ScopedLoopMounter b_mounter(state->a_img, &a_mnt, 0); |
| |
| EXPECT_TRUE(utils::WriteFile(StringPrintf("%s/hardtocompress", |
| a_mnt.c_str()).c_str(), |
| reinterpret_cast<const char*>(kRandomString), |
| sizeof(kRandomString) - 1)); |
| // Write 1 MiB of 0xff to try to catch the case where writing a bsdiff |
| // patch fails to zero out the final block. |
| vector<char> ones(1024 * 1024, 0xff); |
| EXPECT_TRUE(utils::WriteFile(StringPrintf("%s/ones", |
| a_mnt.c_str()).c_str(), |
| &ones[0], |
| ones.size())); |
| } |
| |
| if (noop) { |
| EXPECT_TRUE(file_util::CopyFile(FilePath(state->a_img), |
| FilePath(state->b_img))); |
| } else { |
| CreateExtImageAtPath(state->b_img, NULL); |
| EXPECT_EQ(0, System(base::StringPrintf( |
| "dd if=/dev/zero of=%s seek=%d bs=1 count=1", |
| state->b_img.c_str(), |
| state->image_size + 1024 * 1024 - 1))); |
| EXPECT_EQ(state->image_size + 1024 * 1024, utils::FileSize(state->b_img)); |
| |
| // Make some changes to the B image. |
| string b_mnt; |
| ScopedLoopMounter b_mounter(state->b_img, &b_mnt, 0); |
| |
| EXPECT_EQ(0, system(StringPrintf("cp %s/hello %s/hello2", b_mnt.c_str(), |
| b_mnt.c_str()).c_str())); |
| EXPECT_EQ(0, system(StringPrintf("rm %s/hello", b_mnt.c_str()).c_str())); |
| EXPECT_EQ(0, system(StringPrintf("mv %s/hello2 %s/hello", b_mnt.c_str(), |
| b_mnt.c_str()).c_str())); |
| EXPECT_EQ(0, system(StringPrintf("echo foo > %s/foo", |
| b_mnt.c_str()).c_str())); |
| EXPECT_EQ(0, system(StringPrintf("touch %s/emptyfile", |
| b_mnt.c_str()).c_str())); |
| EXPECT_TRUE(WriteSparseFile(StringPrintf("%s/fullsparse", b_mnt.c_str()), |
| 1024 * 1024)); |
| EXPECT_EQ(0, system(StringPrintf("dd if=/dev/zero of=%s/partsparese bs=1 " |
| "seek=4096 count=1", |
| b_mnt.c_str()).c_str())); |
| EXPECT_EQ(0, system(StringPrintf("cp %s/srchardlink0 %s/tmp && " |
| "mv %s/tmp %s/srchardlink1", |
| b_mnt.c_str(), b_mnt.c_str(), |
| b_mnt.c_str(), b_mnt.c_str()).c_str())); |
| EXPECT_EQ(0, system(StringPrintf("rm %s/boguslink && " |
| "echo foobar > %s/boguslink", |
| b_mnt.c_str(), b_mnt.c_str()).c_str())); |
| EXPECT_TRUE(utils::WriteFile(StringPrintf("%s/hardtocompress", |
| b_mnt.c_str()).c_str(), |
| reinterpret_cast<const char*>(kRandomString), |
| sizeof(kRandomString))); |
| } |
| |
| string old_kernel; |
| EXPECT_TRUE(utils::MakeTempFile("/tmp/old_kernel.XXXXXX", |
| &state->old_kernel, |
| NULL)); |
| |
| string new_kernel; |
| EXPECT_TRUE(utils::MakeTempFile("/tmp/new_kernel.XXXXXX", |
| &state->new_kernel, |
| NULL)); |
| |
| state->old_kernel_data.resize(kDefaultKernelSize); |
| state->new_kernel_data.resize(state->old_kernel_data.size()); |
| FillWithData(&state->old_kernel_data); |
| FillWithData(&state->new_kernel_data); |
| |
| // change the new kernel data |
| strcpy(&state->new_kernel_data[0], kNewDataString); |
| |
| if (noop) { |
| state->old_kernel_data = state->new_kernel_data; |
| } |
| |
| // Write kernels to disk |
| EXPECT_TRUE(utils::WriteFile(state->old_kernel.c_str(), |
| &state->old_kernel_data[0], |
| state->old_kernel_data.size())); |
| EXPECT_TRUE(utils::WriteFile(state->new_kernel.c_str(), |
| &state->new_kernel_data[0], |
| state->new_kernel_data.size())); |
| |
| EXPECT_TRUE(utils::MakeTempFile("/tmp/delta.XXXXXX", |
| &state->delta_path, |
| NULL)); |
| LOG(INFO) << "delta path: " << state->delta_path; |
| { |
| string a_mnt, b_mnt; |
| ScopedLoopMounter a_mounter(state->a_img, &a_mnt, MS_RDONLY); |
| ScopedLoopMounter b_mounter(state->b_img, &b_mnt, MS_RDONLY); |
| const string private_key = |
| signature_test == kSignatureGenerator ? kUnittestPrivateKeyPath : ""; |
| EXPECT_TRUE( |
| DeltaDiffGenerator::GenerateDeltaUpdateFile( |
| full_rootfs ? "" : a_mnt, |
| full_rootfs ? "" : state->a_img, |
| b_mnt, |
| state->b_img, |
| full_kernel ? "" : state->old_kernel, |
| state->new_kernel, |
| state->delta_path, |
| private_key, |
| &state->metadata_size)); |
| } |
| |
| if (signature_test == kSignatureGenerated) { |
| // Generate the signed payload and update the metadata size in state to |
| // reflect the new size after adding the signature operation to the |
| // manifest. |
| SignGeneratedPayload(state->delta_path, &state->metadata_size); |
| } else if (signature_test == kSignatureGeneratedShell || |
| signature_test == kSignatureGeneratedShellBadKey || |
| signature_test == kSignatureGeneratedShellRotateCl1 || |
| signature_test == kSignatureGeneratedShellRotateCl2) { |
| SignGeneratedShellPayload(signature_test, state->delta_path); |
| } |
| } |
| |
| static void ApplyDeltaFile(bool full_kernel, bool full_rootfs, bool noop, |
| SignatureTest signature_test, DeltaState* state, |
| bool hash_checks_mandatory, |
| OperationHashTest op_hash_test, |
| DeltaPerformer** performer) { |
| // Check the metadata. |
| { |
| DeltaArchiveManifest manifest; |
| EXPECT_TRUE(PayloadSigner::LoadPayload(state->delta_path, |
| &state->delta, |
| &manifest, |
| &state->metadata_size)); |
| LOG(INFO) << "Metadata size: " << state->metadata_size; |
| |
| if (signature_test == kSignatureNone) { |
| EXPECT_FALSE(manifest.has_signatures_offset()); |
| EXPECT_FALSE(manifest.has_signatures_size()); |
| } else { |
| EXPECT_TRUE(manifest.has_signatures_offset()); |
| EXPECT_TRUE(manifest.has_signatures_size()); |
| Signatures sigs_message; |
| EXPECT_TRUE(sigs_message.ParseFromArray( |
| &state->delta[state->metadata_size + manifest.signatures_offset()], |
| manifest.signatures_size())); |
| if (signature_test == kSignatureGeneratedShellRotateCl1 || |
| signature_test == kSignatureGeneratedShellRotateCl2) |
| EXPECT_EQ(2, sigs_message.signatures_size()); |
| else |
| EXPECT_EQ(1, sigs_message.signatures_size()); |
| const Signatures_Signature& signature = sigs_message.signatures(0); |
| EXPECT_EQ(1, signature.version()); |
| |
| uint64_t expected_sig_data_length = 0; |
| vector<string> key_paths (1, kUnittestPrivateKeyPath); |
| if (signature_test == kSignatureGeneratedShellRotateCl1 || |
| signature_test == kSignatureGeneratedShellRotateCl2) { |
| key_paths.push_back(kUnittestPrivateKey2Path); |
| } |
| EXPECT_TRUE(PayloadSigner::SignatureBlobLength( |
| key_paths, |
| &expected_sig_data_length)); |
| EXPECT_EQ(expected_sig_data_length, manifest.signatures_size()); |
| EXPECT_FALSE(signature.data().empty()); |
| } |
| |
| if (noop) { |
| EXPECT_EQ(1, manifest.install_operations_size()); |
| EXPECT_EQ(1, manifest.kernel_install_operations_size()); |
| } |
| |
| if (full_kernel) { |
| EXPECT_FALSE(manifest.has_old_kernel_info()); |
| } else { |
| EXPECT_EQ(state->old_kernel_data.size(), |
| manifest.old_kernel_info().size()); |
| EXPECT_FALSE(manifest.old_kernel_info().hash().empty()); |
| } |
| |
| if (full_rootfs) { |
| EXPECT_FALSE(manifest.has_old_rootfs_info()); |
| } else { |
| EXPECT_EQ(state->image_size, manifest.old_rootfs_info().size()); |
| EXPECT_FALSE(manifest.old_rootfs_info().hash().empty()); |
| } |
| |
| EXPECT_EQ(state->new_kernel_data.size(), manifest.new_kernel_info().size()); |
| EXPECT_EQ(state->image_size, manifest.new_rootfs_info().size()); |
| |
| EXPECT_FALSE(manifest.new_kernel_info().hash().empty()); |
| EXPECT_FALSE(manifest.new_rootfs_info().hash().empty()); |
| } |
| |
| PrefsMock prefs; |
| EXPECT_CALL(prefs, SetInt64(kPrefsManifestMetadataSize, |
| state->metadata_size)).WillOnce(Return(true)); |
| EXPECT_CALL(prefs, SetInt64(kPrefsUpdateStateNextOperation, _)) |
| .WillRepeatedly(Return(true)); |
| EXPECT_CALL(prefs, GetInt64(kPrefsUpdateStateNextOperation, _)) |
| .WillOnce(Return(false)); |
| EXPECT_CALL(prefs, SetInt64(kPrefsUpdateStateNextDataOffset, _)) |
| .WillRepeatedly(Return(true)); |
| EXPECT_CALL(prefs, SetString(kPrefsUpdateStateSHA256Context, _)) |
| .WillRepeatedly(Return(true)); |
| if (op_hash_test == kValidOperationData && signature_test != kSignatureNone) { |
| EXPECT_CALL(prefs, SetString(kPrefsUpdateStateSignedSHA256Context, _)) |
| .WillOnce(Return(true)); |
| EXPECT_CALL(prefs, SetString(kPrefsUpdateStateSignatureBlob, _)) |
| .WillOnce(Return(true)); |
| } |
| |
| // Update the A image in place. |
| InstallPlan install_plan; |
| install_plan.hash_checks_mandatory = hash_checks_mandatory; |
| install_plan.metadata_size = state->metadata_size; |
| LOG(INFO) << "Setting payload metadata size in Omaha = " |
| << state->metadata_size; |
| ASSERT_TRUE(PayloadSigner::GetMetadataSignature( |
| &state->delta[0], |
| state->metadata_size, |
| kUnittestPrivateKeyPath, |
| &install_plan.metadata_signature)); |
| EXPECT_FALSE(install_plan.metadata_signature.empty()); |
| |
| *performer = new DeltaPerformer(&prefs, |
| &state->mock_system_state, |
| &install_plan); |
| EXPECT_TRUE(utils::FileExists(kUnittestPublicKeyPath)); |
| (*performer)->set_public_key_path(kUnittestPublicKeyPath); |
| |
| EXPECT_EQ(state->image_size, |
| OmahaHashCalculator::RawHashOfFile(state->a_img, |
| state->image_size, |
| &install_plan.rootfs_hash)); |
| EXPECT_TRUE(OmahaHashCalculator::RawHashOfData(state->old_kernel_data, |
| &install_plan.kernel_hash)); |
| |
| EXPECT_EQ(0, (*performer)->Open(state->a_img.c_str(), 0, 0)); |
| EXPECT_TRUE((*performer)->OpenKernel(state->old_kernel.c_str())); |
| |
| ActionExitCode expected_error, actual_error; |
| bool continue_writing; |
| switch(op_hash_test) { |
| case kInvalidOperationData: { |
| // Muck with some random offset post the metadata size so that |
| // some operation hash will result in a mismatch. |
| int some_offset = state->metadata_size + 300; |
| LOG(INFO) << "Tampered value at offset: " << some_offset; |
| state->delta[some_offset]++; |
| expected_error = kActionCodeDownloadOperationHashMismatch; |
| continue_writing = false; |
| break; |
| } |
| |
| case kValidOperationData: |
| default: |
| // no change. |
| expected_error = kActionCodeSuccess; |
| continue_writing = true; |
| break; |
| } |
| |
| // Write at some number of bytes per operation. Arbitrarily chose 5. |
| const size_t kBytesPerWrite = 5; |
| for (size_t i = 0; i < state->delta.size(); i += kBytesPerWrite) { |
| size_t count = min(state->delta.size() - i, kBytesPerWrite); |
| bool write_succeeded = ((*performer)->Write(&state->delta[i], |
| count, |
| &actual_error)); |
| // Normally write_succeeded should be true every time and |
| // actual_error should be kActionCodeSuccess. If so, continue the loop. |
| // But if we seeded an operation hash error above, then write_succeeded |
| // will be false. The failure may happen at any operation n. So, all |
| // Writes until n-1 should succeed and the nth operation will fail with |
| // actual_error. In this case, we should bail out of the loop because |
| // we cannot proceed applying the delta. |
| if (!write_succeeded) { |
| LOG(INFO) << "Write failed. Checking if it failed with expected error"; |
| EXPECT_EQ(expected_error, actual_error); |
| if (!continue_writing) { |
| LOG(INFO) << "Cannot continue writing. Bailing out."; |
| break; |
| } |
| } |
| |
| EXPECT_EQ(kActionCodeSuccess, actual_error); |
| } |
| |
| // If we had continued all the way through, Close should succeed. |
| // Otherwise, it should fail. Check appropriately. |
| bool close_result = (*performer)->Close(); |
| if (continue_writing) |
| EXPECT_EQ(0, close_result); |
| else |
| EXPECT_LE(0, close_result); |
| } |
| |
| void VerifyPayloadResult(DeltaPerformer* performer, |
| DeltaState* state, |
| ActionExitCode expected_result) { |
| if (!performer) { |
| EXPECT_TRUE(!"Skipping payload verification since performer is NULL."); |
| return; |
| } |
| |
| int expected_times = (expected_result == kActionCodeSuccess) ? 1 : 0; |
| EXPECT_CALL(*(state->mock_system_state.mock_payload_state()), |
| DownloadComplete()).Times(expected_times); |
| |
| LOG(INFO) << "Verifying payload for expected result " |
| << expected_result; |
| EXPECT_EQ(expected_result, performer->VerifyPayload( |
| OmahaHashCalculator::OmahaHashOfData(state->delta), |
| state->delta.size())); |
| LOG(INFO) << "Verified payload."; |
| |
| if (expected_result != kActionCodeSuccess) { |
| // no need to verify new partition if VerifyPayload failed. |
| return; |
| } |
| |
| CompareFilesByBlock(state->old_kernel, state->new_kernel); |
| CompareFilesByBlock(state->a_img, state->b_img); |
| |
| vector<char> updated_kernel_partition; |
| EXPECT_TRUE(utils::ReadFile(state->old_kernel, &updated_kernel_partition)); |
| EXPECT_EQ(0, strncmp(&updated_kernel_partition[0], kNewDataString, |
| strlen(kNewDataString))); |
| |
| uint64_t new_kernel_size; |
| vector<char> new_kernel_hash; |
| uint64_t new_rootfs_size; |
| vector<char> new_rootfs_hash; |
| EXPECT_TRUE(performer->GetNewPartitionInfo(&new_kernel_size, |
| &new_kernel_hash, |
| &new_rootfs_size, |
| &new_rootfs_hash)); |
| EXPECT_EQ(kDefaultKernelSize, new_kernel_size); |
| vector<char> expected_new_kernel_hash; |
| EXPECT_TRUE(OmahaHashCalculator::RawHashOfData(state->new_kernel_data, |
| &expected_new_kernel_hash)); |
| EXPECT_TRUE(expected_new_kernel_hash == new_kernel_hash); |
| EXPECT_EQ(state->image_size, new_rootfs_size); |
| vector<char> expected_new_rootfs_hash; |
| EXPECT_EQ(state->image_size, |
| OmahaHashCalculator::RawHashOfFile(state->b_img, |
| state->image_size, |
| &expected_new_rootfs_hash)); |
| EXPECT_TRUE(expected_new_rootfs_hash == new_rootfs_hash); |
| } |
| |
| void VerifyPayload(DeltaPerformer* performer, |
| DeltaState* state, |
| SignatureTest signature_test) { |
| ActionExitCode expected_result = kActionCodeSuccess; |
| switch (signature_test) { |
| case kSignatureNone: |
| expected_result = kActionCodeSignedDeltaPayloadExpectedError; |
| break; |
| case kSignatureGeneratedShellBadKey: |
| expected_result = kActionCodeDownloadPayloadPubKeyVerificationError; |
| break; |
| default: break; // appease gcc |
| } |
| |
| VerifyPayloadResult(performer, state, expected_result); |
| } |
| |
| void DoSmallImageTest(bool full_kernel, bool full_rootfs, bool noop, |
| SignatureTest signature_test, |
| bool hash_checks_mandatory) { |
| DeltaState state; |
| DeltaPerformer *performer; |
| GenerateDeltaFile(full_kernel, full_rootfs, noop, signature_test, &state); |
| ScopedPathUnlinker a_img_unlinker(state.a_img); |
| ScopedPathUnlinker b_img_unlinker(state.b_img); |
| ScopedPathUnlinker delta_unlinker(state.delta_path); |
| ScopedPathUnlinker old_kernel_unlinker(state.old_kernel); |
| ScopedPathUnlinker new_kernel_unlinker(state.new_kernel); |
| ApplyDeltaFile(full_kernel, full_rootfs, noop, signature_test, |
| &state, hash_checks_mandatory, kValidOperationData, |
| &performer); |
| VerifyPayload(performer, &state, signature_test); |
| } |
| |
| // Calls delta performer's Write method by pretending to pass in bytes from a |
| // delta file whose metadata size is actual_metadata_size and tests if all |
| // checks are correctly performed if the install plan contains |
| // expected_metadata_size and that the result of the parsing are as per |
| // hash_checks_mandatory flag. |
| void DoMetadataSizeTest(uint64_t expected_metadata_size, |
| uint64_t actual_metadata_size, |
| bool hash_checks_mandatory) { |
| PrefsMock prefs; |
| InstallPlan install_plan; |
| install_plan.hash_checks_mandatory = hash_checks_mandatory; |
| MockSystemState mock_system_state; |
| DeltaPerformer performer(&prefs, &mock_system_state, &install_plan); |
| EXPECT_EQ(0, performer.Open("/dev/null", 0, 0)); |
| EXPECT_TRUE(performer.OpenKernel("/dev/null")); |
| |
| // Set a valid magic string and version number 1. |
| EXPECT_TRUE(performer.Write("CrAU", 4)); |
| uint64_t version = htobe64(1); |
| EXPECT_TRUE(performer.Write(&version, 8)); |
| |
| install_plan.metadata_size = expected_metadata_size; |
| ActionExitCode error_code; |
| // When filling in size in manifest, exclude the size of the 20-byte header. |
| uint64_t size_in_manifest = htobe64(actual_metadata_size - 20); |
| bool result = performer.Write(&size_in_manifest, 8, &error_code); |
| if (expected_metadata_size == actual_metadata_size || |
| !hash_checks_mandatory) { |
| EXPECT_TRUE(result); |
| } else { |
| EXPECT_FALSE(result); |
| EXPECT_EQ(kActionCodeDownloadInvalidMetadataSize, error_code); |
| } |
| |
| EXPECT_LT(performer.Close(), 0); |
| } |
| |
| // Generates a valid delta file but tests the delta performer by suppling |
| // different metadata signatures as per omaha_metadata_signature flag and |
| // sees if the result of the parsing are as per hash_checks_mandatory flag. |
| void DoMetadataSignatureTest(MetadataSignatureTest metadata_signature_test, |
| SignatureTest signature_test, |
| bool hash_checks_mandatory) { |
| DeltaState state; |
| |
| // Using kSignatureNone since it doesn't affect the results of our test. |
| // If we've to use other signature options, then we'd have to get the |
| // metadata size again after adding the signing operation to the manifest. |
| GenerateDeltaFile(true, true, false, signature_test, &state); |
| |
| ScopedPathUnlinker a_img_unlinker(state.a_img); |
| ScopedPathUnlinker b_img_unlinker(state.b_img); |
| ScopedPathUnlinker delta_unlinker(state.delta_path); |
| ScopedPathUnlinker old_kernel_unlinker(state.old_kernel); |
| ScopedPathUnlinker new_kernel_unlinker(state.new_kernel); |
| |
| // Loads the payload and parses the manifest. |
| vector<char> payload; |
| EXPECT_TRUE(utils::ReadFile(state.delta_path, &payload)); |
| LOG(INFO) << "Payload size: " << payload.size(); |
| |
| InstallPlan install_plan; |
| install_plan.hash_checks_mandatory = hash_checks_mandatory; |
| install_plan.metadata_size = state.metadata_size; |
| |
| DeltaPerformer::MetadataParseResult expected_result, actual_result; |
| ActionExitCode expected_error, actual_error; |
| |
| // Fill up the metadata signature in install plan according to the test. |
| switch (metadata_signature_test) { |
| case kEmptyMetadataSignature: |
| install_plan.metadata_signature.clear(); |
| expected_result = DeltaPerformer::kMetadataParseError; |
| expected_error = kActionCodeDownloadMetadataSignatureMissingError; |
| break; |
| |
| case kInvalidMetadataSignature: |
| install_plan.metadata_signature = kBogusMetadataSignature1; |
| expected_result = DeltaPerformer::kMetadataParseError; |
| expected_error = kActionCodeDownloadMetadataSignatureMismatch; |
| break; |
| |
| case kValidMetadataSignature: |
| default: |
| // Set the install plan's metadata size to be the same as the one |
| // in the manifest so that we pass the metadata size checks. Only |
| // then we can get to manifest signature checks. |
| ASSERT_TRUE(PayloadSigner::GetMetadataSignature( |
| &payload[0], |
| state.metadata_size, |
| kUnittestPrivateKeyPath, |
| &install_plan.metadata_signature)); |
| EXPECT_FALSE(install_plan.metadata_signature.empty()); |
| expected_result = DeltaPerformer::kMetadataParseSuccess; |
| expected_error = kActionCodeSuccess; |
| break; |
| } |
| |
| // Ignore the expected result/error if hash checks are not mandatory. |
| if (!hash_checks_mandatory) { |
| expected_result = DeltaPerformer::kMetadataParseSuccess; |
| expected_error = kActionCodeSuccess; |
| } |
| |
| // Create the delta performer object. |
| PrefsMock prefs; |
| DeltaPerformer delta_performer(&prefs, |
| &state.mock_system_state, |
| &install_plan); |
| |
| // Use the public key corresponding to the private key used above to |
| // sign the metadata. |
| EXPECT_TRUE(utils::FileExists(kUnittestPublicKeyPath)); |
| delta_performer.set_public_key_path(kUnittestPublicKeyPath); |
| |
| // Parse the delta payload we created. |
| DeltaArchiveManifest manifest; |
| uint64_t parsed_metadata_size; |
| |
| // Init actual_error with an invalid value so that we make sure |
| // ParsePayloadMetadata properly populates it in all cases. |
| actual_error = kActionCodeUmaReportedMax; |
| actual_result = delta_performer.ParsePayloadMetadata(payload, &manifest, |
| &parsed_metadata_size, &actual_error); |
| |
| EXPECT_EQ(expected_result, actual_result); |
| EXPECT_EQ(expected_error, actual_error); |
| |
| // Check that the parsed metadata size is what's expected. This test |
| // implicitly confirms that the metadata signature is valid, if required. |
| EXPECT_EQ(state.metadata_size, parsed_metadata_size); |
| } |
| |
| void DoOperationHashMismatchTest(OperationHashTest op_hash_test, |
| bool hash_checks_mandatory) { |
| DeltaState state; |
| GenerateDeltaFile(true, true, false, kSignatureGenerated, &state); |
| ScopedPathUnlinker a_img_unlinker(state.a_img); |
| ScopedPathUnlinker b_img_unlinker(state.b_img); |
| ScopedPathUnlinker delta_unlinker(state.delta_path); |
| ScopedPathUnlinker old_kernel_unlinker(state.old_kernel); |
| ScopedPathUnlinker new_kernel_unlinker(state.new_kernel); |
| DeltaPerformer *performer; |
| ApplyDeltaFile(true, true, false, kSignatureGenerated, |
| &state, hash_checks_mandatory, op_hash_test, &performer); |
| } |
| |
| class DeltaPerformerTest : public ::testing::Test { }; |
| |
| TEST(DeltaPerformerTest, ExtentsToByteStringTest) { |
| uint64_t test[] = {1, 1, 4, 2, kSparseHole, 1, 0, 1}; |
| COMPILE_ASSERT(arraysize(test) % 2 == 0, array_size_uneven); |
| const uint64_t block_size = 4096; |
| const uint64_t file_length = 5 * block_size - 13; |
| |
| google::protobuf::RepeatedPtrField<Extent> extents; |
| for (size_t i = 0; i < arraysize(test); i += 2) { |
| Extent* extent = extents.Add(); |
| extent->set_start_block(test[i]); |
| extent->set_num_blocks(test[i + 1]); |
| } |
| |
| string expected_output = "4096:4096,16384:8192,-1:4096,0:4083"; |
| string actual_output; |
| EXPECT_TRUE(DeltaPerformer::ExtentsToBsdiffPositionsString(extents, |
| block_size, |
| file_length, |
| &actual_output)); |
| EXPECT_EQ(expected_output, actual_output); |
| } |
| |
| TEST(DeltaPerformerTest, RunAsRootSmallImageTest) { |
| bool hash_checks_mandatory = false; |
| DoSmallImageTest(false, false, false, kSignatureGenerator, |
| hash_checks_mandatory); |
| } |
| |
| TEST(DeltaPerformerTest, RunAsRootFullKernelSmallImageTest) { |
| bool hash_checks_mandatory = false; |
| DoSmallImageTest(true, false, false, kSignatureGenerator, |
| hash_checks_mandatory); |
| } |
| |
| TEST(DeltaPerformerTest, RunAsRootFullSmallImageTest) { |
| bool hash_checks_mandatory = true; |
| DoSmallImageTest(true, true, false, kSignatureGenerator, |
| hash_checks_mandatory); |
| } |
| |
| TEST(DeltaPerformerTest, RunAsRootNoopSmallImageTest) { |
| bool hash_checks_mandatory = false; |
| DoSmallImageTest(false, false, true, kSignatureGenerator, |
| hash_checks_mandatory); |
| } |
| |
| TEST(DeltaPerformerTest, RunAsRootSmallImageSignNoneTest) { |
| bool hash_checks_mandatory = false; |
| DoSmallImageTest(false, false, false, kSignatureNone, |
| hash_checks_mandatory); |
| } |
| |
| TEST(DeltaPerformerTest, RunAsRootSmallImageSignGeneratedTest) { |
| bool hash_checks_mandatory = true; |
| DoSmallImageTest(false, false, false, kSignatureGenerated, |
| hash_checks_mandatory); |
| } |
| |
| TEST(DeltaPerformerTest, RunAsRootSmallImageSignGeneratedShellTest) { |
| bool hash_checks_mandatory = false; |
| DoSmallImageTest(false, false, false, kSignatureGeneratedShell, |
| hash_checks_mandatory); |
| } |
| |
| TEST(DeltaPerformerTest, RunAsRootSmallImageSignGeneratedShellBadKeyTest) { |
| bool hash_checks_mandatory = false; |
| DoSmallImageTest(false, false, false, kSignatureGeneratedShellBadKey, |
| hash_checks_mandatory); |
| } |
| |
| TEST(DeltaPerformerTest, RunAsRootSmallImageSignGeneratedShellRotateCl1Test) { |
| bool hash_checks_mandatory = false; |
| DoSmallImageTest(false, false, false, kSignatureGeneratedShellRotateCl1, |
| hash_checks_mandatory); |
| } |
| |
| TEST(DeltaPerformerTest, RunAsRootSmallImageSignGeneratedShellRotateCl2Test) { |
| bool hash_checks_mandatory = false; |
| DoSmallImageTest(false, false, false, kSignatureGeneratedShellRotateCl2, |
| hash_checks_mandatory); |
| } |
| |
| TEST(DeltaPerformerTest, BadDeltaMagicTest) { |
| PrefsMock prefs; |
| InstallPlan install_plan; |
| MockSystemState mock_system_state; |
| DeltaPerformer performer(&prefs, &mock_system_state, &install_plan); |
| EXPECT_EQ(0, performer.Open("/dev/null", 0, 0)); |
| EXPECT_TRUE(performer.OpenKernel("/dev/null")); |
| EXPECT_TRUE(performer.Write("junk", 4)); |
| EXPECT_TRUE(performer.Write("morejunk", 8)); |
| EXPECT_FALSE(performer.Write("morejunk", 8)); |
| EXPECT_LT(performer.Close(), 0); |
| } |
| |
| TEST(DeltaPerformerTest, IsIdempotentOperationTest) { |
| DeltaArchiveManifest_InstallOperation op; |
| EXPECT_TRUE(DeltaPerformer::IsIdempotentOperation(op)); |
| *(op.add_dst_extents()) = ExtentForRange(0, 5); |
| EXPECT_TRUE(DeltaPerformer::IsIdempotentOperation(op)); |
| *(op.add_src_extents()) = ExtentForRange(4, 1); |
| EXPECT_FALSE(DeltaPerformer::IsIdempotentOperation(op)); |
| op.clear_src_extents(); |
| *(op.add_src_extents()) = ExtentForRange(5, 3); |
| EXPECT_TRUE(DeltaPerformer::IsIdempotentOperation(op)); |
| *(op.add_dst_extents()) = ExtentForRange(20, 6); |
| EXPECT_TRUE(DeltaPerformer::IsIdempotentOperation(op)); |
| *(op.add_src_extents()) = ExtentForRange(19, 2); |
| EXPECT_FALSE(DeltaPerformer::IsIdempotentOperation(op)); |
| } |
| |
| TEST(DeltaPerformerTest, WriteUpdatesPayloadState) { |
| PrefsMock prefs; |
| InstallPlan install_plan; |
| MockSystemState mock_system_state; |
| DeltaPerformer performer(&prefs, &mock_system_state, &install_plan); |
| EXPECT_EQ(0, performer.Open("/dev/null", 0, 0)); |
| EXPECT_TRUE(performer.OpenKernel("/dev/null")); |
| |
| EXPECT_CALL(*(mock_system_state.mock_payload_state()), |
| DownloadProgress(4)).Times(1); |
| EXPECT_CALL(*(mock_system_state.mock_payload_state()), |
| DownloadProgress(8)).Times(2); |
| |
| EXPECT_TRUE(performer.Write("junk", 4)); |
| EXPECT_TRUE(performer.Write("morejunk", 8)); |
| EXPECT_FALSE(performer.Write("morejunk", 8)); |
| EXPECT_LT(performer.Close(), 0); |
| } |
| |
| TEST(DeltaPerformerTest, MissingMandatoryMetadataSizeTest) { |
| DoMetadataSizeTest(0, 75456, true); |
| } |
| |
| TEST(DeltaPerformerTest, MissingNonMandatoryMetadataSizeTest) { |
| DoMetadataSizeTest(0, 123456, false); |
| } |
| |
| TEST(DeltaPerformerTest, InvalidMandatoryMetadataSizeTest) { |
| DoMetadataSizeTest(13000, 140000, true); |
| } |
| |
| TEST(DeltaPerformerTest, InvalidNonMandatoryMetadataSizeTest) { |
| DoMetadataSizeTest(40000, 50000, false); |
| } |
| |
| TEST(DeltaPerformerTest, ValidMandatoryMetadataSizeTest) { |
| DoMetadataSizeTest(85376, 85376, true); |
| } |
| |
| TEST(DeltaPerformerTest, RunAsRootMandatoryEmptyMetadataSignatureTest) { |
| DoMetadataSignatureTest(kEmptyMetadataSignature, kSignatureGenerated, true); |
| } |
| |
| TEST(DeltaPerformerTest, RunAsRootNonMandatoryEmptyMetadataSignatureTest) { |
| DoMetadataSignatureTest(kEmptyMetadataSignature, kSignatureGenerated, false); |
| } |
| |
| TEST(DeltaPerformerTest, RunAsRootMandatoryInvalidMetadataSignatureTest) { |
| DoMetadataSignatureTest(kInvalidMetadataSignature, kSignatureGenerated, true); |
| } |
| |
| TEST(DeltaPerformerTest, RunAsRootNonMandatoryInvalidMetadataSignatureTest) { |
| DoMetadataSignatureTest(kInvalidMetadataSignature, kSignatureGenerated, |
| false); |
| } |
| |
| TEST(DeltaPerformerTest, RunAsRootMandatoryValidMetadataSignature1Test) { |
| DoMetadataSignatureTest(kValidMetadataSignature, kSignatureNone, true); |
| } |
| |
| TEST(DeltaPerformerTest, RunAsRootMandatoryValidMetadataSignature2Test) { |
| DoMetadataSignatureTest(kValidMetadataSignature, kSignatureGenerated, true); |
| } |
| |
| TEST(DeltaPerformerTest, RunAsRootNonMandatoryValidMetadataSignatureTest) { |
| DoMetadataSignatureTest(kValidMetadataSignature, kSignatureGenerated, false); |
| } |
| |
| TEST(DeltaPerformerTest, RunAsRootMandatoryOperationHashMismatchTest) { |
| DoOperationHashMismatchTest(kInvalidOperationData, true); |
| } |
| |
| } // namespace chromeos_update_engine |