Sign a JWS with an HMAC Key from BinData

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetMacKeyBd, which sets the symmetric MAC key for a signature from the raw bytes in a BinData.

Dim success As Boolean = False

Dim jws As New Chilkat.Jws

'  Protected header specifying HMAC-SHA256.
Dim header As New Chilkat.JsonObject
header.UpdateString("alg","HS256")
success = jws.SetProtectedHeader(0,header)
If (success = False) Then
    Debug.WriteLine(jws.LastErrorText)
    Exit Sub
End If


Dim bIncludeBom As Boolean = False
success = jws.SetPayload("This is the content to sign.","utf-8",bIncludeBom)
If (success = False) Then
    Debug.WriteLine(jws.LastErrorText)
    Exit Sub
End If


'  Set the symmetric MAC key for signature 0 from the raw bytes in a BinData.  In production, obtain
'  the key material from a secure source.
Dim bdKey As New Chilkat.BinData
bdKey.AppendEncoded("YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU=","base64")
success = jws.SetMacKeyBd(0,bdKey)
If (success = False) Then
    Debug.WriteLine(jws.LastErrorText)
    Exit Sub
End If


Dim jwsCompact As String = jws.CreateJws()
If (jws.LastMethodSuccess = False) Then
    Debug.WriteLine(jws.LastErrorText)
    Exit Sub
End If

Debug.WriteLine(jwsCompact)