(Xojo Plugin) Add S/MIME Signature using PFX

Add a digital signature to a MIME message using the certificate + private key from a PFX file.

Chilkat Xojo Plugin Download Xojo Plugin for Windows, Linux, Mac OS X, and ARM, ARM64

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

Dim mime As New Chilkat.Mime

// Load a PFX file into a certificate object.
Dim cert As New Chilkat.Cert
Dim pfxFilepath As String
pfxFilepath = "pfxFiles/something.pfx"
Dim pfxPassword As String
pfxPassword = "secret"
Dim success As Boolean
success = cert.LoadPfxFile(pfxFilepath,pfxPassword)
If (success = False) Then
    System.DebugLog(cert.LastErrorText)
    Return
End If

success = mime.SetBodyFromPlainText("This is the plain-text MIME body.")

mime.Charset = "utf-8"
mime.Encoding = "quoted-printable"

// Sign the MIME (adds a PKCS7 detached signature)
success = mime.AddDetachedSignature(cert)
If (success = False) Then
    System.DebugLog(mime.LastErrorText)
    Return
End If

// Save the S/MIME to a file.
success = mime.SaveMime("/temp/signedMime.txt")
If (success = False) Then
    System.DebugLog(mime.LastErrorText)
    Return
End If

System.DebugLog("success!")