Xojo Plugin Requires Chilkat v10.1.2+

Send Signed Email using PFX File (long version)

Demonstrates how to send a signed email using a digital certificate w/ private key stored in a PFX file. Xojo Plugin

Dim success As Boolean
success = False

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

//  The mailman object is used for sending and receiving email.
Dim mailman As New Chilkat.MailMan

//  Set the SMTP server.
mailman.SmtpHost = "smtp.mymailserver.com"

//  Create a new email object
Dim email As New Chilkat.Email

email.Subject = "This email is signed"
email.Body = "This is a digitally signed mail"
email.From = "Chilkat Admin <admin@chilkatsoft.com>"
success = email.AddTo("Chilkat Support","support@chilkatsoft.com")

//  Indicate that the email should be sent signed.
email.SendSigned = True

//  Load a PFX file into a certificate store object.
//  Then locate the certificate matching the  sender's email address,
//  and use it for signing.
//  (a PFX file may contain more than one certificate.)
Dim certStore As New Chilkat.CertStore
//  The 1st argument is the path of the PFX file, the 2nd arg is the 
//  PFX file's password:
success = certStore.LoadPfxFile("/pfx_files/chilkatsoft_secret.pfx","secret")
If (success <> True) Then
    System.DebugLog(certStore.LastErrorText)
    Return
End If

//  Find the certificate for the email address:
Dim jsonE As New Chilkat.JsonObject
success = jsonE.UpdateString("email","admin@chilkatsoft.com")

Dim cert As New Chilkat.Cert
success = certStore.FindCert(jsonE,cert)
If (success = False) Then
    System.DebugLog(certStore.LastErrorText)
    Return
End If

//  Alternatively, if a PFX file is known to contain a single certificate,
//  you may load it directly into a Chilkat certificate object.
//  This snippet of source code shows how:
Dim cert2 As New Chilkat.Cert
//  The 1st argument is the filename, the 2nd arg is the 
//  PFX file's password:
success = cert2.LoadPfxFile("/pfx_files/chilkatsoft_secret.pfx","secret")
If (success <> True) Then
    System.DebugLog(cert2.LastErrorText)
    Return
End If

//  This example will use the cert from the certStore...
success = email.SetSigningCert(cert)

//  Signed email can be sent in two different ways.  
//  In a multipart/signed email, the signature is attached as a separate MIME part.
//  In an opaque email (signedData) the content of the email is encapsulated within the signature
//  and the email is sent as "application/pkcs7-mime". 
//  Either should be fine, but some receiving systems might require one or the other..
mailman.OpaqueSigning = False

//  Send a signed email.
success = mailman.SendEmail(email)
If (success <> True) Then
    System.DebugLog(mailman.LastErrorText)
Else
    //  The LastErrorText property provides information
    //  even when successful.
    System.DebugLog(mailman.LastErrorText)
    System.DebugLog("Mail Sent!")
End If