Get the Certificate Used for Decryption

See more MIME Examples

Loads a CMS/PKCS #7 encrypted S/MIME message and decrypts it back to the original MIME content.

After a successful decryption, LastDecryptCert loads the certificate(s) actually used into a Cert object, indexed from zero up to NumDecryptCerts minus one.

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.

Dim success As Boolean = False

Dim mime As ChilkatMime
mime.Initialize
success = mime.LoadMimeFile("qa_data/encrypted.eml")
If success = False Then
    Log(mime.LastErrorText)
    Return
End If


'  Configure a decryption source and decrypt.
Dim pfxPassword As String = "myPfxPassword"
success = mime.AddPfxSourceFile("qa_data/recipient.pfx", pfxPassword)
If success = False Then
    Log(mime.LastErrorText)
    Return
End If

success = mime.Decrypt
If success = False Then
    Log(mime.LastErrorText)
    Return
End If


'  After a successful decryption, load the certificate(s) that were used.  The 1st argument is the
'  zero-based index and the 2nd is a Cert that receives the certificate.
Dim n As Int = mime.NumDecryptCerts
Dim cert As ChilkatCert
cert.Initialize("cert")
Dim i As Int
For i = 0 To n - 1
    success = mime.LastDecryptCert(i, cert)
    If success = False Then
        Log(mime.LastErrorText)
        Return
    End If

    Log("Decrypted with: " & cert.SubjectCN)
Next