Encrypt MIME for Multiple Recipients

See more MIME Examples

Demonstrates encrypting the current MIME entity for several recipients at once. A certificate is added for each recipient with AddEncryptCert, and EncryptN then produces a single CMS/PKCS #7 message that each recipient can independently decrypt.

The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

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

set mime = CreateObject("Chilkat.Mime")
success = mime.SetBodyFromPlainText("This message will be encrypted.")
If (success = 0) Then
    outFile.WriteLine(mime.LastErrorText)
    WScript.Quit
End If

'  Add a certificate for each intended recipient.  Every recipient receives an independently
'  wrapped copy of the message key.
set cert1 = CreateObject("Chilkat.Cert")
success = cert1.LoadFromFile("qa_data/recipient1.cer")
If (success = 0) Then
    outFile.WriteLine(cert1.LastErrorText)
    WScript.Quit
End If

success = mime.AddEncryptCert(cert1)
If (success = 0) Then
    outFile.WriteLine(mime.LastErrorText)
    WScript.Quit
End If

set cert2 = CreateObject("Chilkat.Cert")
success = cert2.LoadFromFile("qa_data/recipient2.cer")
If (success = 0) Then
    outFile.WriteLine(cert2.LastErrorText)
    WScript.Quit
End If

success = mime.AddEncryptCert(cert2)
If (success = 0) Then
    outFile.WriteLine(mime.LastErrorText)
    WScript.Quit
End If

'  Encrypt for every added recipient at once.
success = mime.EncryptN()
If (success = 0) Then
    outFile.WriteLine(mime.LastErrorText)
    WScript.Quit
End If

success = mime.SaveMime("qa_output/encrypted_multi.eml")
If (success = 0) Then
    outFile.WriteLine(mime.LastErrorText)
    WScript.Quit
End If

outFile.WriteLine("Message encrypted for multiple recipients.")

outFile.Close