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Jun 25, 2025
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Update guest-attestation-confidential-virtual-machines-design.md #127198

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Update guest-attestation-confidential-virtual-machines-design.md
hyperfinitism Jun 23, 2025
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docs: revert Attestation Report Format changes, update Runtime Data F…
hyperfinitism Jun 25, 2025
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6 changes: 3 additions & 3 deletions ...onfidential-computing/guest-attestation-confidential-virtual-machines-design.md
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Expand Up @@ -94,7 +94,6 @@ Refer to [Azure Confidential VMs attestation guidance & FAQ](https://github.com/
| Report Payload | 32 | 1184 | The hardware report. |
| Runtime Data | 1216 | variable length | The runtime data includes claims endorsed by the hardware report. |


#### Header

| Name | Offset (bytes) | Size (bytes) | Description |
Expand All @@ -114,11 +113,12 @@ The report generated by the hardware (AMD SEV-SNP or Intel TDX). The report_data

| Name | Offset (bytes) | Size (bytes) | Description | Measured |
| :--- | :--- | :--- | :--- | :--- |
| Data Size | 0 | 4 | The size of Runtime Claims. | No |
| Data Size | 0 | 4 | The size of Runtime Data. | No |
| Version | 4 | 4 | Format version. Expected: 1. | No |
| Report Type | 8 | 4 | The type of hardware report. Expected: 2 (AMD SEV-SNP), 4 (Intel TDX) | No |
| Hash Type | 12 | 4 | The algorithm used to hash the runtime data. The hash value is captured in the report_data field of the hardware report. Expected: 1 (SHA-256), 2 (SHA-384), 3 (SHA-512) | No |
| Runtime Claims | 16 | variable length | The runtime claims in JSON format. | Yes |
| Claim Size | 16 | 4 | The size of Runtime Claims. | No |
| Runtime Claims | 20 | variable length | The runtime claims in JSON format. | Yes |

#### Runtime Claims

Expand Down