`ConvertPtrToString` - Invalid UTF-8 bytes: invalid utf-8 sequence of 1 bytes from index 0

[mattcargile]

I would expect this pipeline to work. It would output some junk but still work. I'm working on Windows 11 and PowerShell 7.5.4.

Error

# Must Run as Admin on Windows
Get-SecureBootUEFI db | ConvertFrom-ByteArrayToBase64 | ConvertTo-String

Workaround No Module

The below works "correctly" and doesn't fail. I think there may be a failure in the interop rust layer.

[System.Text.Encoding]::UTF8.GetString((Get-SecureBootUEFI db).Bytes)

Stacktrace

Here is the Get-Error.

Type        : System.Management.Automation.ActionPreferenceStopException
ErrorRecord : 
    Exception             : 
        Type                        : System.Management.Automation.RuntimeException
        ErrorRecord                 : 
            Exception             : 
                Type    : System.Management.Automation.ParentContainsErrorRecordException
                Message : Invalid UTF-8 bytes: invalid utf-8 sequence of 1 bytes from index 0
                HResult : -2146233087
            CategoryInfo          : NotSpecified: (:) [], ParentContainsErrorRecordException
            FullyQualifiedErrorId : RuntimeException
        WasThrownFromThrowStatement : True
        Message                     : Invalid UTF-8 bytes: invalid utf-8 sequence of 1 bytes from index 0
        HResult                     : -2146233087
    TargetObject          : Invalid UTF-8 bytes: invalid utf-8 sequence of 1 bytes from index 0
    CategoryInfo          : OperationStopped: (Invalid UTF-8 bytes… bytes from index 0:String) [Write-Error], RuntimeException
    FullyQualifiedErrorId : Invalid UTF-8 bytes: invalid utf-8 sequence of 1 bytes from index 0,ConvertFrom-Base64ToString
    InvocationInfo        : 
        MyCommand        : ConvertFrom-Base64ToString
        ScriptLineNumber : 2396
        OffsetInLine     : 28
        HistoryId        : 1007
        ScriptName       : C:\Users\matt\OneDrive - My Company\Documents\PowerShell\Modules\Convert\2.0.0\Convert.psm1
        Line             :             $InputObject | & $Function @splat -ErrorAction $userErrorActionPreference

        Statement        : & $Function @splat -ErrorAction $userErrorActionPreference
        PositionMessage  : At C:\Users\matt\OneDrive - My Company\Documents\PowerShell\Modules\Convert\2.0.0\Convert.psm1:2396 char:28
                           + … putObject | & $Function @splat -ErrorAction $userErrorActionPreferenc …
                           +               ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
        PSScriptRoot     : C:\Users\matt\OneDrive - My Company\Documents\PowerShell\Modules\Convert\2.0.0
        PSCommandPath    : C:\Users\matt\OneDrive - My Company\Documents\PowerShell\Modules\Convert\2.0.0\Convert.psm1
        InvocationName   : &
        CommandOrigin    : Internal
    ScriptStackTrace      : at ConvertFrom-Base64ToString<Process>, C:\Users\matt\OneDrive - My Company\Documents\PowerShell\Modules\Convert\2.0.0\Convert.psm1: line 2962
                            at ConvertTo-String<Process>, C:\Users\matt\OneDrive - My Company\Documents\PowerShell\Modules\Convert\2.0.0\Convert.psm1: line 2396
                            at ConvertPtrToString, C:\Users\matt\OneDrive - My Company\Documents\PowerShell\Modules\Convert\2.0.0\Convert.psm1: line 3072
                            at ConvertFrom-ByteArrayToBase64<Process>, C:\Users\matt\OneDrive - My Company\Documents\PowerShell\Modules\Convert\2.0.0\Convert.psm1: line 2057
                            at <ScriptBlock>, C:\Users\matt\scoop\apps\gsudo\current\Invoke-gsudo.ps1: line 206
                            at <ScriptBlock>, C:\Users\matt\scoop\apps\gsudo\current\Invoke-gsudo.ps1: line 187
                            at <ScriptBlock>, <No file>: line 1
    PipelineIterationInfo : 
              1
              1
TargetSite  : 
    Name          : Invoke
    DeclaringType : [System.Management.Automation.Runspaces.PipelineBase]
    MemberType    : Method
    Module        : System.Management.Automation.dll
Message     : The running command stopped because the preference variable "ErrorActionPreference" or common parameter is set to Stop: Invalid UTF-8 bytes: invalid utf-8 sequence of 1 bytes from index 0
Data        : System.Collections.ListDictionaryInternal
Source      : System.Management.Automation
HResult     : -2146233087
StackTrace  : 
   at System.Management.Automation.Runspaces.PipelineBase.Invoke(IEnumerable input)
   at Microsoft.PowerShell.Executor.ExecuteCommandHelper(Pipeline tempPipeline, Exception& exceptionThrown, ExecutionOptions options)

Workaround With Module

ConvertFrom-ByteArrayToMemoryStream (Get-SecureBootUEFI db).Bytes | ConvertFrom-MemoryStreamToString

Notes

If one has scoop install gsudo, then one can

Invoke-Gsudo { ConvertFrom-ByteArrayToMemoryStream (Get-SecureBootUEFI db).Bytes | ConvertFrom-MemoryStreamToString }