(Classic ASP) 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

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
'  This example requires the Chilkat API to have been previously unlocked.
'  See Global Unlock Sample for sample code.

set crypt = Server.CreateObject("Chilkat_9_5_0.Crypt2")

crypt.CryptAlgorithm = "pki"

set pem = Server.CreateObject("Chilkat_9_5_0.Pem")
success = pem.LoadPemFile("qa_data/pem/myPem.pem","password")
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( pem.LastErrorText) & "</pre>"
    Response.End
End If

' privkey is a Chilkat_9_5_0.PrivateKey
Set privkey = pem.GetPrivateKey(0)
If (pem.LastMethodSuccess <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( pem.LastErrorText) & "</pre>"
    Response.End
End If

' cert is a Chilkat_9_5_0.Cert
Set cert = pem.GetCert(0)
If (pem.LastMethodSuccess <> 1) Then

    Response.Write "<pre>" & Server.HTMLEncode( pem.LastErrorText) & "</pre>"
    Response.End
End If

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

    Response.Write "<pre>" & Server.HTMLEncode( crypt.LastErrorText) & "</pre>"
    Response.End
End If

success = crypt.CkDecryptFile("qa_data/infile.enc","qa_output/outfile.dat")
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( crypt.LastErrorText) & "</pre>"
    Response.End
End If

Response.Write "<pre>" & Server.HTMLEncode( "Success.") & "</pre>"

%>
</body>
</html>