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21 lines
1006 B
Markdown
21 lines
1006 B
Markdown
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# Obtain current Azure SNP ID key digest
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On Azure, Constellation verifies that the SNP attestation report contains Azure's ID key digest.
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Currently, the only way to verify this digest's origin is to perform guest attestation with the help of the Microsoft Azure Attestation (MAA) service.
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There's a [sample](https://github.com/Azure/confidential-computing-cvm-guest-attestation) on how to do this, but it's not straightforward.
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So we created tooling to make things easier.
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Perform the following steps to get the ID key digest:
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1. Create an Ubuntu CVM on Azure with secure boot enabled and ssh into it.
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2. Run
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```
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docker run --rm --privileged -v/sys/kernel/security:/sys/kernel/security ghcr.io/edgelesssys/constellation/get-azure-snp-jwt
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```
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This executes the guest attestation and prints the JWT received from the MAA. (It's the long base64 blob.)
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3. Copy the JWT and run **on your local trusted machine**:
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```
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go run verify.go <jwt>
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```
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On success it prints the ID key digest.
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