PKCS7 Decrypt Using .pfx or .p12 File

Demonstrates how to decrypt MIME using a specifc PFX file (.pfx or .p12) for the source of certificate(s) and private key(s).

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Dim mime As New Chilkat.Mime()

Dim success As Boolean
success = mime.UnlockComponent("Anything for 30-day trial.")
If (success = false) Then
    TextBox1.Text = TextBox1.Text & mime.LastErrorText & vbCrLf
    Exit Sub
End If


'  Load the MIME
success = mime.LoadMimeFile("encrypted.mim")
If (success = false) Then
    TextBox1.Text = TextBox1.Text & mime.LastErrorText & vbCrLf
    Exit Sub
End If



'  Decrypt using a specific PFX file:
Dim pfxPassword As String
pfxPassword = "myPassword"
success = mime.DecryptUsingPfxFile("c:/myPfxFiles/myCertAndPrivateKey.pfx",pfxPassword)
If (success = false) Then
    TextBox1.Text = TextBox1.Text & mime.LastErrorText & vbCrLf
    Exit Sub
End If


'  Display the decrypted MIME:
TextBox1.Text = TextBox1.Text & mime.GetMime() & vbCrLf


'  Note: The MIME to be decrypted should look something like this
'  when viewed in a text editor:
'  (Note that the Content-Type is application/x-pkcs7-mime)
'  
Content-Disposition: attachment; filename="smime.p7m"
Content-Transfer-Encoding: base64
Content-Type: application/x-pkcs7-mime;
 name="smime.p7m"

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