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Parameters dont support secret() function #1078

@Gijsreyn

Description

@Gijsreyn

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Summary

While working on writing documentation around the secret() function, I encountered an issue on parameterizing secret retrieval. I have the following secret extension available:

Image

When I declare the following configuration document:

$schema: https://aka.ms/dsc/schemas/v3/bundled/config/document.json
parameters:
  myString:
    type: secureString
    defaultValue: "[secret('MySecret')]"
resources:
- name: Database Connection
  type: Microsoft.DSC.Debug/Echo
  properties:
    output: "[parameters('myString')]"

It throws me an error:

2025-08-25T09:27:59.097593Z DEBUG dsc::subcommand: 334: No parameters specified
2025-08-25T09:27:59.097749Z DEBUG dsc_lib::configure: 719: Processing parameter 'osFamily'
2025-08-25T09:27:59.097901Z DEBUG dsc_lib::configure: 721: Set default parameter 'osFamily'
2025-08-25T09:27:59.098080Z DEBUG dsc_lib::parser: 48: Parsing statement: [secret('MySecret')]
2025-08-25T09:27:59.098224Z DEBUG dsc_lib::parser: 89: Parsing expression
2025-08-25T09:27:59.098331Z DEBUG dsc_lib::parser::expressions: 43: Parsing function '{Node function (0, 1) - (0, 19)}'
2025-08-25T09:27:59.098459Z DEBUG dsc_lib::parser::functions: 57: Function name: 'secret'
2025-08-25T09:27:59.098591Z DEBUG dsc_lib::parser::functions: 80: Argument is a value: 'String("MySecret")'
2025-08-25T09:27:59.098722Z ERROR dsc::subcommand: 377: Parameter input failure: Function 'secret': No extensions supporting secrets was found

Steps to reproduce

Steps described in the description.

Expected behavior

The `secret()` function can be used in parameters.

Actual behavior

No extensions supporting secret was found.

Error details

No extensions supporting secret was found.

Environment data

Name                           Value
----                           -----
PSVersion                      7.5.2
PSEdition                      Core
GitCommitId                    7.5.2
OS                             Microsoft Windows 10.0.26100
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

Version

dsc 3.2.0-preview.4

Visuals

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