(VBScript) S/MIME Encrypt .eml without Sending

See more Email Object Examples

Demonstrates how to encrypt an email using the recipient's digital certificate. This example just encrypts, and does not send the email.

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)

success = 0

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

set email = CreateObject("Chilkat.Email")

success = email.LoadEml("c:/temp/email/unencrypted.eml")
If (success = 0) Then
    outFile.WriteLine(email.LastErrorText)
    WScript.Quit
End If

' The email content is encrypted using AES with a 256-bit key, operating in GCM mode, which provides authenticated encryption.
email.Pkcs7CryptAlg = "aes-gcm"
email.Pkcs7KeyLength = 256
email.OaepPadding = 1
email.OaepHash = "sha256"
email.OaepMgfHash = "sha256"

set cert = CreateObject("Chilkat.Cert")
success = cert.LoadFromFile("c/temps/cert/recipient.cer")
If (success = 0) Then
    outFile.WriteLine(cert.LastErrorText)
    WScript.Quit
End If

email.SendEncrypted = 1
success = email.SetEncryptCert(cert)

set sbSmime = CreateObject("Chilkat.StringBuilder")

' The mailman object applies the encryption by rendering the email according to the instructions (property settings) provided in the email object.
' No email is sent.
set mailman = CreateObject("Chilkat.MailMan")
success = mailman.RenderToMimeSb(email,sbSmime)
If (success = 0) Then
    outFile.WriteLine(mailman.LastErrorText)
    WScript.Quit
End If

success = sbSmime.WriteFile("c:/temp/encryptedEmail.eml","utf-8",0)
If (success = 0) Then
    outFile.WriteLine(mailman.LastErrorText)
    WScript.Quit
End If

outFile.WriteLine("Success!")

outFile.Close