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Create a CAdES-T Signature

See more CAdES Examples

Demonstrates how to create a signature with an external timestamp that certifies the time of signing. This requires an online TSA (Time Stamping Authority) service that is capable of producing RFC 3161 compliant timestamps.

Note: This example requires Chilkat v9.5.0.78 or greater.

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Local $bSuccess = False

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

$oCrypt = ObjCreate("Chilkat.Crypt2")

; This example will use a certificate + private key from a .pfx/.p12 file.
; On Windows systems, it is also possible to use certs on smartcards/usb tokens or certs pre-installed in the Windows registry.
$oCert = ObjCreate("Chilkat.Cert")

Local $sPfxPath = "qa_data/pfx/myCertAndKey.p12"
Local $sPfxPassword = "test123"

$bSuccess = $oCert.LoadPfxFile($sPfxPath,$sPfxPassword)
If ($bSuccess <> True) Then
    ConsoleWrite($oCert.LastErrorText & @CRLF)
    Exit
EndIf

$bSuccess = $oCrypt.SetSigningCert($oCert)

; Use SHA-256 rather than the default of SHA-1
$oCrypt.HashAlgorithm = "sha256"

; Create JSON that tells Chilkat what signing attributes to include:
$oAttrs = ObjCreate("Chilkat.JsonObject")
$oAttrs.UpdateBool("contentType",True)
$oAttrs.UpdateBool("signingTime",True)
$oAttrs.UpdateBool("messageDigest",True)
$oAttrs.UpdateBool("signingCertificateV2",True)

; A CAdES-T signature is one that includes a timestampToken created by an online TSA (time stamping authority).
; We must include the TSA's URL, as well as a few options to indicate what is desired.
; Except for the TSA URL, the options shown here are typically what you would need.
$oAttrs.UpdateBool("timestampToken.enabled",True)
$oAttrs.UpdateString("timestampToken.tsaUrl","https://freetsa.org/tsr")
$oAttrs.UpdateBool("timestampToken.addNonce",False)
$oAttrs.UpdateBool("timestampToken.requestTsaCert",True)
$oAttrs.UpdateString("timestampToken.hashAlg","sha256")

$oCrypt.SigningAttributes = $oAttrs.Emit()

Local $sInFile = "qa_data/json/sample.json"
Local $sOutFile = "qa_output/sample_cades_t.p7m"

; This creates the CAdES-T signature.  During the signature creation, it
; communicates with the TSA to get a timestampToken.
$bSuccess = $oCrypt.CreateP7M($sInFile,$sOutFile)
If ($bSuccess <> True) Then
    ConsoleWrite($oCrypt.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("Success." & @CRLF)