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Get-AuthenticodeSignature

JuanPablo Jofre|Last Updated: 12/22/2016
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3 Contributors

SYNOPSIS

Gets information about the Authenticode signature in a file.

SYNTAX

ByPath (Default)

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

ByLiteralPath

Get-AuthenticodeSignature -LiteralPath <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.

EXAMPLES

-------------------------- EXAMPLE 1 --------------------------

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

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

-------------------------- EXAMPLE 2 --------------------------

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

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 --------------------------

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

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".

PARAMETERS

-FilePath

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.

Type: String[]
Parameter Sets: ByPath
Aliases: 

Required: True
Position: 1
Default value: None
Accept pipeline input: True (ByPropertyName, ByValue)
Accept wildcard characters: True

-LiteralPath

Specifies the path to the file being examined. Unlike FilePath, the value of the LiteralPath parameter is used exactly as it is typed. No characters are interpreted as wildcards. If the path includes escape characters, enclose it in single quotation marks. Single quotation marks tell Windows PowerShell not to interpret any characters as escape sequences.

Type: String[]
Parameter Sets: ByLiteralPath
Aliases: PSPath

Required: True
Position: Named
Default value: None
Accept pipeline input: True (ByPropertyName)
Accept wildcard characters: False

CommonParameters

This cmdlet supports the common parameters: -Debug, -ErrorAction, -ErrorVariable, -InformationAction, -InformationVariable, -OutVariable, -OutBuffer, -PipelineVariable, -Verbose, -WarningAction, and -WarningVariable. For more information, see about_CommonParameters (http://go.microsoft.com/fwlink/?LinkID=113216).

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.

*

Get-ExecutionPolicy

Set-AuthenticodeSignature

Set-ExecutionPolicy

about_Execution_Policies

about_Signing

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