(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).

Note: This example requires Chilkat v11.0.0 or greater.

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

LOCAL lnSuccess
LOCAL loCrypt
LOCAL loPem
LOCAL loPrivkey
LOCAL loCert

lnSuccess = 0

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

loCrypt = CreateObject('Chilkat.Crypt2')

loCrypt.CryptAlgorithm = "pki"

loPem = CreateObject('Chilkat.Pem')
lnSuccess = loPem.LoadPemFile("qa_data/pem/myPem.pem","password")
IF (lnSuccess = 0) THEN
    ? loPem.LastErrorText
    RELEASE loCrypt
    RELEASE loPem
    CANCEL
ENDIF

loPrivkey = CreateObject('Chilkat.PrivateKey')
lnSuccess = loPem.PrivateKeyAt(0,loPrivkey)
IF (lnSuccess = 0) THEN
    ? loPem.LastErrorText
    RELEASE loCrypt
    RELEASE loPem
    RELEASE loPrivkey
    CANCEL
ENDIF

loCert = CreateObject('Chilkat.Cert')
lnSuccess = loPem.CertAt(0,loCert)
IF (lnSuccess = 0) THEN
    ? loPem.LastErrorText
    RELEASE loCrypt
    RELEASE loPem
    RELEASE loPrivkey
    RELEASE loCert
    CANCEL
ENDIF

lnSuccess = loCrypt.SetDecryptCert2(loCert,loPrivkey)
IF (lnSuccess = 0) THEN
    ? loCrypt.LastErrorText
    RELEASE loCrypt
    RELEASE loPem
    RELEASE loPrivkey
    RELEASE loCert
    CANCEL
ENDIF

lnSuccess = loCrypt.CkDecryptFile("qa_data/infile.enc","qa_output/outfile.dat")
IF (lnSuccess = 0) THEN
    ? loCrypt.LastErrorText
    RELEASE loCrypt
    RELEASE loPem
    RELEASE loPrivkey
    RELEASE loCert
    CANCEL
ENDIF

? "Success."

RELEASE loCrypt
RELEASE loPem
RELEASE loPrivkey
RELEASE loCert