mirror of
https://github.com/edgelesssys/constellation.git
synced 2024-10-01 01:36:09 -04:00
21 lines
1006 B
Markdown
21 lines
1006 B
Markdown
# Obtain current Azure SNP ID key digest
|
|
|
|
On Azure, Constellation verifies that the SNP attestation report contains Azure's ID key digest.
|
|
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.
|
|
There's a [sample](https://github.com/Azure/confidential-computing-cvm-guest-attestation) on how to do this, but it's not straightforward.
|
|
So we created tooling to make things easier.
|
|
|
|
Perform the following steps to get the ID key digest:
|
|
|
|
1. Create an Ubuntu CVM on Azure with secure boot enabled and ssh into it.
|
|
2. Run
|
|
```
|
|
docker run --rm --privileged -v/sys/kernel/security:/sys/kernel/security ghcr.io/edgelesssys/constellation/get-azure-snp-jwt
|
|
```
|
|
This executes the guest attestation and prints the JWT received from the MAA. (It's the long base64 blob.)
|
|
3. Copy the JWT and run **on your local trusted machine**:
|
|
```
|
|
go run verify.go <jwt>
|
|
```
|
|
On success it prints the ID key digest.
|