Creating a SIG image definition with security type TrustedLaunchSupported fails

Describe the bug

Command Name az sig image-definition create

Errors:

(InvalidParameter) The value 'TrustedLaunchSupported' for feature 'SecurityType' is invalid. Allowed characters are English alphanumerical characters with spaces and commas. The length of the value cannot exceed 100 characters.
Code: InvalidParameter
Message: The value 'TrustedLaunchSupported' for feature 'SecurityType' is invalid. Allowed characters are English alphanumerical characters with spaces and commas. The length of the value cannot exceed 100 characters.
Target: galleryImage.properties.features

To Reproduce:

Steps to reproduce the behavior. Note that argument values have been redacted, as they may contain sensitive information.

• Create SIG
• az sig image-definition create --resource-group {} -l {} --gallery-name {} --gallery-image-definition {} --publisher {} --offer {} --sku {} --os-type Linux --os-state generalized --hyper-v-generation V2 --features SecurityType=TrustedLaunchSupported

Expected Behavior

Image definition should be created successfully. See examples in the docs: https://learn.microsoft.com/en-us/cli/azure/sig/image-definition?view=azure-cli-latest#az-sig-image-definition-create

Environment Summary

Linux-5.15.0-48-generic-x86_64-with-glibc2.35, Ubuntu 22.04.1 LTS
Python 3.10.5
Installer: DEB

azure-cli 2.40.0

Extensions:
ssh 1.0.1
account 0.2.2

Dependencies:
msal 1.18.0b1
azure-mgmt-resource 21.1.0b1

Additional Context

[sandeepraichura]

@malt3 @litian1992 - I’m looking into this, and I’ll keep you posted soon

[litian1992]

If you create an image definition with Trusted Launch supported (in portal or anyway), you will see something like below with az sig image-definition show:

...
  "features": [
    {
      "name": "SecurityType",
      "value": "TrustedLaunch"
    }
  ],
...

And so I’m able to create one again using CLI with SecurityType equal to TrustedLaunch. But then where I fail to execute is it equal to TrustedLaunchAndConfidentialVmSupported. Any help please?