Visual FoxPro Requires Chilkat v11.7.0+

Remove the Authenticode Signature from an MSI, PowerShell, or VBScript File

See more Code Signing Examples

Demonstrates how to remove the Authenticode signature from a Windows Installer package (.msi), a PowerShell file (.ps1, .psm1, .psd1), or a VBScript file (.vbs). Removing the signature from these file types requires Chilkat v11.7.0 or later. Visual FoxPro

LOCAL lnSuccess
LOCAL lcPath
LOCAL loCodeSign
LOCAL loSigInfo
LOCAL lnValid

lnSuccess = 0

*  This example requires the Chilkat API to have been previously unlocked.
*  See Global Unlock Sample for sample code.

*  Starting in Chilkat v11.7.0, RemoveSignature can remove the Authenticode signature from
*    - Windows Installer packages (.msi)
*    - PowerShell scripts, modules, and data files (.ps1, .psm1, .psd1)
*    - VBScript files (.vbs)
*  in addition to EXE and DLL files.

*  This example removes the signature from a signed PowerShell script.
*  To remove the signature from an .msi or a .vbs, pass the path of that file instead.
lcPath = "C:/someDir/Deploy.ps1"

loCodeSign = CreateObject('Chilkat.CodeSign')

*  The file is modified in place.  Keep a copy if the signed file is still needed.
*  
*  For a PowerShell or VBScript file, the signature comment block is removed from the end of the file.
*  For an MSI, the digital signature stream and the extended signature stream (MsiDigitalSignatureEx)
*  are removed from the package.
lnSuccess = loCodeSign.RemoveSignature(lcPath)
IF (lnSuccess = 0) THEN
    ? loCodeSign.LastErrorText
    RELEASE loCodeSign
    CANCEL
ENDIF

? "The signature was removed."

*  The file is now unsigned, so VerifySignature returns false.
loSigInfo = CreateObject('Chilkat.JsonObject')
lnValid = loCodeSign.VerifySignature(lcPath,loSigInfo)
? "has a valid signature: " + STR(lnValid)

RELEASE loCodeSign
RELEASE loSigInfo