Visual Basic 6.0
Visual Basic 6.0
Encrypt MIME for a Recipient Certificate
See more MIME Examples
Demonstrates encrypting the current MIME entity for a single recipient using the Mime.Encrypt method. The entity is replaced with CMS/PKCS #7 encrypted S/MIME that only the holder of the recipient's private key can read.
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.
Background. S/MIME encryption uses the recipient's public certificate to protect a message so that only the matching private key can recover it. The recipient certificate must be RSA-based. Only the recipient's public key is needed to encrypt—the private key is required to decrypt.
Chilkat Visual Basic 6.0 Downloads
Dim success As Long
success = 0
Dim mime As New ChilkatMime
success = mime.SetBodyFromPlainText("This message will be encrypted.")
If (success = 0) Then
Debug.Print mime.LastErrorText
Exit Sub
End If
' Load the recipient's certificate (public key only is sufficient for encrypting).
Dim cert As New ChilkatCert
success = cert.LoadFromFile("qa_data/recipient.cer")
If (success = 0) Then
Debug.Print cert.LastErrorText
Exit Sub
End If
' Encrypt for the recipient. The entity is replaced with CMS/PKCS #7 encrypted S/MIME that only
' the holder of the recipient's private key can decrypt. The certificate must be RSA-based.
success = mime.Encrypt(cert)
If (success = 0) Then
Debug.Print mime.LastErrorText
Exit Sub
End If
success = mime.SaveMime("qa_output/encrypted.eml")
If (success = 0) Then
Debug.Print mime.LastErrorText
Exit Sub
End If
Debug.Print "Message encrypted."