ConvertFrom-SecureString.ps1

# .ExternalHelp Utility.PS-help.xml
function ConvertFrom-SecureString {
    [CmdletBinding(DefaultParameterSetName = 'Secure', HelpUri = 'https://go.microsoft.com/fwlink/?LinkID=113287')]
    param(
        [Parameter(Mandatory = $true, Position = 0, ValueFromPipeline = $true)]
        [securestring]
        ${SecureString},

        [Parameter(ParameterSetName = 'PlainText')]
        [switch]
        ${AsPlainText},

        [Parameter(ParameterSetName = 'PlainText')]
        [switch]
        ${Force},

        [Parameter(ParameterSetName = 'Secure', Position = 1)]
        [securestring]
        ${SecureKey},

        [Parameter(ParameterSetName = 'Open')]
        [byte[]]
        ${Key}
    )

    begin {
        ## Command Extension
        if (${AsPlainText}) {
            if ($PSVersionTable.PSVersion -ge [version]'7.0') {
                Write-Warning 'PowerShell 7 introduced an AsPlainText parameter to the ConvertFrom-SecureString cmdlet.'
            }
            if (!${Force}) {
                Write-Warning 'The system cannot protect plain text output. To suppress this warning, reissue the command specifying the Force parameter.'
            }
            return
        }

        ## Remove extra parameters (not needed because with these parameters the original command never executes)
        #if ($PSBoundParameters.ContainsKey('AsPlainText')) { [void] $PSBoundParameters.Remove('AsPlainText') }
        #if ($PSBoundParameters.ContainsKey('Force')) { [void] $PSBoundParameters.Remove('Force') }

        ## Resume Command
        try {
            $outBuffer = $null
            if ($PSBoundParameters.TryGetValue('OutBuffer', [ref]$outBuffer)) {
                $PSBoundParameters['OutBuffer'] = 1
            }
            $wrappedCmd = $ExecutionContext.InvokeCommand.GetCommand('Microsoft.PowerShell.Security\ConvertFrom-SecureString', [System.Management.Automation.CommandTypes]::Cmdlet)
            $scriptCmd = { & $wrappedCmd @PSBoundParameters }
            $steppablePipeline = $scriptCmd.GetSteppablePipeline($myInvocation.CommandOrigin)
            $steppablePipeline.Begin($PSCmdlet)
        }
        catch {
            throw
        }
    }

    process {
        ## Command Extension
        if (${AsPlainText}) {
            #if (${Force}) {
                try {
                    [IntPtr] $BSTR = [System.Runtime.InteropServices.Marshal]::SecureStringToBSTR($SecureString)
                    Write-Output ([System.Runtime.InteropServices.Marshal]::PtrToStringBSTR($BSTR))
                }
                finally {
                    [System.Runtime.InteropServices.Marshal]::ZeroFreeBSTR($BSTR)
                }
            #}
            return
        }

        ## Resume Command
        try {
            $steppablePipeline.Process($_)
        }
        catch {
            throw
        }
    }

    end {
        ## Command Extension
        if (${AsPlainText}) { return }

        ## Resume Command
        try {
            $steppablePipeline.End()
        }
        catch {
            throw
        }
    }
    <#
 
    .ForwardHelpTargetName Microsoft.PowerShell.Security\ConvertFrom-SecureString
    .ForwardHelpCategory Cmdlet
 
    #>

}

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