(Visual FoxPro) Duplicate OpensSSL Command that Decrypts Binary DER

This example duplicates the following:

openssl smime -decrypt -in INPUT_FILE -inform der -binary -out OUTPUT_FILE -recip PEM_CERT_AND_KEY -passin pass:PRIVKEY_PASSWORD

Note: Although "smime" is the OpenSSL command, we're not really dealing with S/MIME. The arguments "-inform der -binary" indicate that the input is simply the binary DER (i.e. the PKCS7 binary encrypted object). The output can be any type of file (whatever was encrypted).

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

LOCAL loCrypt
LOCAL loPem
LOCAL lnSuccess
LOCAL loPrivkey
LOCAL loCert

* 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')

loCrypt.CryptAlgorithm = "pki"

* 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.SetDecryptCert2(loCert,loPrivkey)
IF (lnSuccess <> 1) THEN
    RELEASE loPrivkey
    RELEASE loCert
    ? loCrypt.LastErrorText
    RELEASE loCrypt
    RELEASE loPem
    CANCEL
ENDIF

RELEASE loPrivkey
RELEASE loCert

lnSuccess = loCrypt.CkDecryptFile("qa_data/infile.enc","qa_output/outfile.dat")
IF (lnSuccess <> 1) THEN
    ? loCrypt.LastErrorText
    RELEASE loCrypt
    RELEASE loPem
    CANCEL
ENDIF

? "Success."

RELEASE loCrypt
RELEASE loPem