(Visual FoxPro) Duplicate OpensSSL to Sign File and Output Binary DER

This example duplicates the following:

openssl smime -sign -in INPUT.xml -signer SIGN.PEM -passin pass:MYPASS -outform der -binary -nodetach -out SIGNED.P7M

Note: Although "smime" is the OpenSSL command, it's not actually producing S/MIME. The arguments "-outform der -binary" indicates that the output is binary DER (i.e. the PKCS7 binary signature). The input can be any type of file: XML, PDF, JPG, ... *anything*...

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

LOCAL loCrypt
LOCAL loPem
LOCAL lnSuccess
LOCAL loPrivkey
LOCAL loCert
LOCAL loCertFromP12

* This example 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')

* Load the PEM containing cert + private key.
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Pem')
loPem = CreateObject('Chilkat.Pem')
lnSuccess = loPem.LoadPemFile("qa_data/pem/myPem.pem","password")
IF (lnSuccess <> 1) THEN
    ? loPem.LastErrorText
    RELEASE loCrypt
    RELEASE loPem
    CANCEL
ENDIF

loPrivkey = loPem.GetPrivateKey(0)
IF (loPem.LastMethodSuccess <> 1) THEN
    ? loPem.LastErrorText
    RELEASE loCrypt
    RELEASE loPem
    CANCEL
ENDIF

loCert = loPem.GetCert(0)
IF (loPem.LastMethodSuccess <> 1) THEN
    RELEASE loPrivkey
    ? loPem.LastErrorText
    RELEASE loCrypt
    RELEASE loPem
    CANCEL
ENDIF

lnSuccess = loCrypt.SetSigningCert2(loCert,loPrivkey)
IF (lnSuccess <> 1) THEN
    RELEASE loPrivkey
    RELEASE loCert
    ? loCrypt.LastErrorText
    RELEASE loCrypt
    RELEASE loPem
    CANCEL
ENDIF

RELEASE loPrivkey
RELEASE loCert

* Alternatively, we could use a .pfx/.p12 file.
* (Chilkat also supports other formats/sources for cert/private keys...)
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Cert')
loCertFromP12 = CreateObject('Chilkat.Cert')
lnSuccess = loCertFromP12.LoadPfxFile("qa_data/p12/myP12.p12","password")
IF (lnSuccess <> 1) THEN
    ? loCertFromP12.LastErrorText
    RELEASE loCrypt
    RELEASE loPem
    RELEASE loCertFromP12
    CANCEL
ENDIF

* The certificate, when loaded from a .pfx/.p12, will automatically 
* include the associated private key, assuming it's present in the .p12.
* We don't have to explicitly provide the private key as in the
* lines of code above that use the PEM file.
lnSuccess = loCrypt.SetSigningCert(loCertFromP12)
IF (lnSuccess <> 1) THEN
    ? loCrypt.LastErrorText
    RELEASE loCrypt
    RELEASE loPem
    RELEASE loCertFromP12
    CANCEL
ENDIF

* Create the opaque signature (PKCS7 binary DER that contains both the signature and original file data).
lnSuccess = loCrypt.CreateP7M("qa_data/infile.anything","qa_output/outfile.p7m")
IF (lnSuccess <> 1) THEN
    ? loCrypt.LastErrorText
    RELEASE loCrypt
    RELEASE loPem
    RELEASE loCertFromP12
    CANCEL
ENDIF

? "Success."

RELEASE loCrypt
RELEASE loPem
RELEASE loCertFromP12