Visual Basic 6.0

Set the Recipient Encryption Certificate

Demonstrates the Chilkat Email.SetEncryptCert method, which sets the explicit recipient encryption certificate for sending an encrypted email. This example loads the recipient's certificate, sets it, and enables encrypted sending.

Background: To encrypt a message for a recipient you need their public certificate — hence a .cer file (no private key) suffices. SetEncryptCert specifies a single recipient certificate; to encrypt for multiple recipients, use AddEncryptCert once per certificate. Either way, setting SendEncrypted to true is what actually requests encryption when the message is sent.

Chilkat Visual Basic 6.0 Downloads

Download Chilkat for Visual Basic 6.0

Visual Basic 6.0

Dim success As Long
success = 0

'  Demonstrates the SetEncryptCert method, which sets the explicit recipient encryption
'  certificate for sending an encrypted email.

Dim email As New ChilkatEmail
email.Subject = "Encrypted email"
email.Body = "This message will be sent S/MIME encrypted."
email.From = "alice@example.com"
success = email.AddTo("Bob","bob@example.com")

'  Load the recipient's certificate (only the public key is needed to encrypt).
Dim cert As New ChilkatCert
success = cert.LoadFromFile("qa_data/certs/recipient.cer")
If (success = 0) Then
    Debug.Print cert.LastErrorText
    Exit Sub
End If

'  Set the explicit recipient encryption certificate.
success = email.SetEncryptCert(cert)
If (success = 0) Then
    Debug.Print email.LastErrorText
    Exit Sub
End If

'  Request encrypted sending.
email.SendEncrypted = 1

Debug.Print "Encryption certificate set."

'  Note: The path "qa_data/certs/recipient.cer" is a relative local filesystem path,
'  relative to the current working directory of the running application.