(VBScript) 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

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

' 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")
set crypt = CreateObject("Chilkat.Crypt2")

crypt.CryptAlgorithm = "pki"

' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Pem")
set pem = CreateObject("Chilkat.Pem")
success = pem.LoadPemFile("qa_data/pem/myPem.pem","password")
If (success <> 1) Then
    outFile.WriteLine(pem.LastErrorText)
    WScript.Quit
End If

' privkey is a Chilkat.PrivateKey
Set privkey = pem.GetPrivateKey(0)
If (pem.LastMethodSuccess <> 1) Then
    outFile.WriteLine(pem.LastErrorText)
    WScript.Quit
End If

' cert is a Chilkat.Cert
Set cert = pem.GetCert(0)
If (pem.LastMethodSuccess <> 1) Then

    outFile.WriteLine(pem.LastErrorText)
    WScript.Quit
End If

success = crypt.SetDecryptCert2(cert,privkey)
If (success <> 1) Then

    outFile.WriteLine(crypt.LastErrorText)
    WScript.Quit
End If

success = crypt.CkDecryptFile("qa_data/infile.enc","qa_output/outfile.dat")
If (success <> 1) Then
    outFile.WriteLine(crypt.LastErrorText)
    WScript.Quit
End If

outFile.WriteLine("Success.")

outFile.Close