B4X

AddDetachedSignaturePk

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Demonstrates how to add a detached signature using a certifcate and it's corresponding private key. The easiest way of doing it is when both the certificate and private key are contained together within a PFX (.pfx or .p12) file. This example demonstrates how to use the certificate and its corresponding private key when they are stored in separate files -- a .cer for the certificate, and a .pem for the private key. B4X

Dim success As Boolean = False

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

Dim mime As ChilkatMime
mime.Initialize

'  Load the certificate from a .cer file.
Dim cert As ChilkatCert
cert.Initialize("cert")
success = cert.LoadFromFile("aaworkarea/myCert.cer")
If success = False Then
    Log(cert.LastErrorText)
    Return
End If


'  Load the private key from an encrypted PEM file.
'  (A private key can be loaded from other file formats also..)
Dim privKey As ChilkatPrivateKey
privKey.Initialize("privKey")
success = privKey.LoadEncryptedPemFile("aaworkarea/myPrivateKey.pem", "myPassword")
If success = False Then
    Log(privKey.LastErrorText)
    Return
End If


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

'  Sign the MIME (adds a PKCS7 detached signature)
success = mime.AddDetachedSignaturePk(cert, privKey)
If success = False Then
    Log(mime.LastErrorText)
    Return
End If


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


Log("success!")