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Get-AuthenticodeSignature

Updated: April 21, 2010

Applies To: Windows PowerShell 2.0

Gets information about the Authenticode signature in a file.

Syntax

Get-AuthenticodeSignature [-FilePath] <string[]> [<CommonParameters>]

Description

The Get-AuthenticodeSignature cmdlet gets information about the Authenticode signature in a file. If the file is not signed, the information is retrieved, but the fields are blank.

Parameters

-FilePath <string[]>

Specifies the path to the file being examined. Wildcards are permitted, but they must lead to a single file. The parameter name ("FilePath") is optional.

 

Required?

true

Position?

1

Default Value

none

Accept Pipeline Input?

true (ByValue, ByPropertyName)

Accept Wildcard Characters?

false

<CommonParameters>

This command supports the common parameters: Verbose, Debug, ErrorAction, ErrorVariable, OutBuffer, OutVariable, WarningAction, and WarningVariable. For more information, see about_CommonParameters.

Inputs and Outputs

The input type is the type of the objects that you can pipe to the cmdlet. The return type is the type of the objects that the cmdlet returns.

 

Inputs

System.String

You can pipe a string that contains a file path to Get-AuthenticodeSignature.

Outputs

System.Management.Automation.Signature

Get-AuthenticodeSignature returns a signature object for each signature that it gets.

Notes

For information about Authenticode signatures in Windows PowerShell, see about_Signing.

Example 1

C:\PS>get-AuthenticodeSignature -filepath C:\Test\NewScript.ps1

Description

-----------

This command gets information about the Authenticode signature in the NewScript.ps1 file. It uses the FilePath parameter to specify the file.

Example 2

C:\PS>get-authenticodesignature test.ps1, test1.ps1, sign-file.ps1, makexml.ps1

Description

-----------

This command gets information about the Authenticode signature in the four files listed at the command line. In this command, the name of the FilePath parameter, which is optional, is omitted.

Example 3

C:\PS>get-childitem $pshome\*.* | foreach-object {Get-AuthenticodeSignature $_} | where {$_.status -eq "Valid"}

Description

-----------

This command lists all of the files in the $pshome directory that have a valid Authenticode signature. The $pshome automatic variable contains the path to the Windows PowerShell installation directory.

The command uses the Get-ChildItem cmdlet to get the files in the $pshome directory. It uses a pattern of *.* to exclude directories (although it also excludes files without a dot in the filename).

The command uses a pipeline operator (|) to send the files in $pshome to the Foreach-Object cmdlet, where Get-AuthenticodeSignature is called for each file.

The results of the Get-AuthenticodeSignature command are sent to a Where-Object command that selects only the signature objects with a status of "Valid".

See Also

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