B4X

Add S/MIME Signature using PFX

See more MIME Examples

Add a digital signature to a MIME message using the certificate + private key from a PFX file. B4X

Dim success As Boolean = False

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

Dim mime As ChilkatMime
mime.Initialize

'  Load a PFX file into a certificate object.
Dim cert As ChilkatCert
cert.Initialize("cert")
Dim pfxFilepath As String = "pfxFiles/something.pfx"
Dim pfxPassword As String = "secret"
success = cert.LoadPfxFile(pfxFilepath, pfxPassword)
If success = False Then
    Log(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
    Log(mime.LastErrorText)
    Return
End If


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


Log("success!")