Integrity-protect stateful partition on CS image #251
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This commit enables a dm-crypt layer of encryption with integrity (using authenticated encryption with additional data) on the partition backing /dev/stateful. This mechanism slows down boot by ~1min. The key is stored in memory, and, as a result, the writable, "stateful" partition is wiped on subsequent boots.
jkl73
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Oct 12, 2022
alexmwu
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Dec 16, 2022
Breaking Changes: New Features: Add IsHardened in launch spec: google#244 Add container logging redirect policy: google#249 Add SEV-SNP attestation support: google#240 Integrity-protect stateful partition on CS image: google#251 Retry launcher OIDC token refresh with backoff: google#261 Change restart policy behavior to reboot: google#260 Add ability to GetGCEInstanceInfo from a certificate: google#267 Bug Fixes: COS event log: require CEL events to use PCR13, add a launch separator, and don't skip unknown events: google#246 Measure LaunchSeparator event: google#247 Skip unallocated PCR selections when reading all PCRs: google#258 Remove gRPC client and use of insecure credentials: google#262 Fix server.VerifyAttestation proto merging(google#263) and defer of os.Exit(google#264): google#265 Other Changes: Add fake verifier client: google#234 Update CI Go Version to 1.19: google#241 Add launcher integration testing support: google#255 Test multi-writer PD creation disabled: google#256 Update go-sev-guest dependency to v0.2.6: google#259 Change OIDC retry policy to hourly and add jitter to refresh time: google#266 Add wrapper cloudbuild workflow to trigger image build and testing: google#269
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alexmwu
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Dec 16, 2022
Breaking Changes: New Features: Add IsHardened in launch spec: #244 Add container logging redirect policy: #249 Add SEV-SNP attestation support: #240 Integrity-protect stateful partition on CS image: #251 Retry launcher OIDC token refresh with backoff: #261 Change restart policy behavior to reboot: #260 Add ability to GetGCEInstanceInfo from a certificate: #267 Bug Fixes: COS event log: require CEL events to use PCR13, add a launch separator, and don't skip unknown events: #246 Measure LaunchSeparator event: #247 Skip unallocated PCR selections when reading all PCRs: #258 Remove gRPC client and use of insecure credentials: #262 Fix server.VerifyAttestation proto merging(#263) and defer of os.Exit(#264): #265 Other Changes: Add fake verifier client: #234 Update CI Go Version to 1.19: #241 Add launcher integration testing support: #255 Test multi-writer PD creation disabled: #256 Update go-sev-guest dependency to v0.2.6: #259 Change OIDC retry policy to hourly and add jitter to refresh time: #266 Add wrapper cloudbuild workflow to trigger image build and testing: #269
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This commit enables a dm-crypt layer of encryption with integrity (using authenticated encryption with additional data) on the partition backing /dev/stateful.
This mechanism slows down boot by ~1min.
The key is stored in memory, and, as a result, the writable, "stateful" partition is wiped on subsequent boots.
Testing
Ran
./run_cloudbuild.sh debugin test project.Created vm from output image.
Examined serial log of the VM: