(Xojo Plugin) 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 Xojo Plugin Download Xojo Plugin for Windows, Linux, Mac OS X, and ARM, ARM64

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

Dim crypt As New Chilkat.Crypt2

crypt.CryptAlgorithm = "pki"

Dim pem As New Chilkat.Pem
Dim success As Boolean
success = pem.LoadPemFile("qa_data/pem/myPem.pem","password")
If (success <> True) Then
    System.DebugLog(pem.LastErrorText)
    Return
End If

Dim privkey As Chilkat.PrivateKey
privkey = pem.GetPrivateKey(0)
If (pem.LastMethodSuccess <> True) Then
    System.DebugLog(pem.LastErrorText)
    Return
End If

Dim cert As Chilkat.Cert
cert = pem.GetCert(0)
If (pem.LastMethodSuccess <> True) Then

    System.DebugLog(pem.LastErrorText)
    Return
End If

success = crypt.SetDecryptCert2(cert,privkey)
If (success <> True) Then

    System.DebugLog(crypt.LastErrorText)
    Return
End If

success = crypt.CkDecryptFile("qa_data/infile.enc","qa_output/outfile.dat")
If (success <> True) Then
    System.DebugLog(crypt.LastErrorText)
    Return
End If

System.DebugLog("Success.")