PowerShell

Sign a File to Create a .p7s (Detached Signature)

See more Encryption Examples

_LANGUAGE_ example to create a detached signature file (.p7s) for any type file. The signature can be verified by calling VerifyP7S and passing the original filename and the .p7s filename. PowerShell

Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

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

$crypt = New-Object Chilkat.Crypt2

# Use a digital certificate and private key from a PFX file (.pfx or .p12).
$signingCertSubject = "Acme Inc"
$pfxFilename = "/Users/chilkat/testData/pfx/acme.pfx"
$pfxPassword = "test123"

$certStore = New-Object Chilkat.CertStore
$success = $certStore.LoadPfxFile($pfxFilename,$pfxPassword)
if ($success -ne $true) {
    $($certStore.LastErrorText)
    exit
}

$jsonCN = New-Object Chilkat.JsonObject
$jsonCN.UpdateString("CN",$signingCertSubject)

$cert = New-Object Chilkat.Cert
$success = $certStore.FindCert($jsonCN,$cert)
if ($success -eq $false) {
    $("Failed to find certificate by subject common name.")
    exit
}

# Tell the crypt component to use this cert.
$success = $crypt.SetSigningCert($cert)

# We can sign any type of file, creating a .p7s as output:
$inFile = "/Users/chilkat/testData/pdf/sample.pdf"
$sigFile = "/Users/chilkat/testData/p7s/sample.p7s"

$success = $crypt.CreateP7S($inFile,$sigFile)
if ($success -eq $false) {
    $($crypt.LastErrorText)
    exit
}

$success = $crypt.VerifyP7S($inFile,$sigFile)
if ($success -eq $false) {
    $($crypt.LastErrorText)
    exit
}

$("Success!")