(Visual FoxPro) Create .p7s using Smart Card or USB Token

Demonstrates how to create a .p7s using a certificate stored on a smart card or USB token.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

LOCAL loCrypt
LOCAL loCert
LOCAL lnSuccess
LOCAL loJsonSignedAttrs
LOCAL lcInFile
LOCAL lcSigFile

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

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Crypt2')
loCrypt = CreateObject('Chilkat.Crypt2')

* Use a certificate on a smartcard or USB token.
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Cert')
loCert = CreateObject('Chilkat.Cert')

* Provide the smartcard PIN.
loCert.SmartCardPin = "000000"

* Load the certificate on the smartcard currently in the reader (or on the USB token).
lnSuccess = loCert.LoadFromSmartcard("")
IF (lnSuccess <> 1) THEN
    ? loCert.LastErrorText
    RELEASE loCrypt
    RELEASE loCert
    CANCEL
ENDIF

* Provide the certificate for signing.
lnSuccess = loCrypt.SetSigningCert(loCert)
IF (lnSuccess <> 1) THEN
    ? loCrypt.LastErrorText
    RELEASE loCrypt
    RELEASE loCert
    CANCEL
ENDIF

* Indicate that SHA-256 should be used.
loCrypt.HashAlgorithm = "sha256"

* Specify the signed attributes to be included.
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.JsonObject')
loJsonSignedAttrs = CreateObject('Chilkat.JsonObject')
loJsonSignedAttrs.UpdateInt("contentType",1)
loJsonSignedAttrs.UpdateInt("signingTime",1)
loJsonSignedAttrs.UpdateInt("messageDigest",1)
loJsonSignedAttrs.UpdateInt("signingCertificateV2",1)
loCrypt.SigningAttributes = loJsonSignedAttrs.Emit()

lcInFile = "qa_data/xml/IT01234567890_11002.xml"
lcSigFile = "qa_output/IT01234567890_11002.xml.p7s"

* Create the .p7s, which is a signature file that does not embed the original data.
* (To create a signature file that also embeds the original data, call CreateP7M instead)
lnSuccess = loCrypt.CreateP7S(lcInFile,lcSigFile)
IF (lnSuccess = 0) THEN
    ? loCrypt.LastErrorText
    RELEASE loCrypt
    RELEASE loCert
    RELEASE loJsonSignedAttrs
    CANCEL
ENDIF

? "Success."

RELEASE loCrypt
RELEASE loCert
RELEASE loJsonSignedAttrs