B4X

Get a JWS Unprotected Header

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.GetUnprotectedH, which copies the optional unprotected header of a signature into a JsonObject.

Background. The unprotected header is present only in JSON serialization forms that carry one. It is not covered by the signature.

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Dim success As Boolean = False

Dim jws As ChilkatJws
jws.Initialize

'  Load the JWS compact serialization.
Dim jwsCompact As String = "eyJhbGciOiJIUzI1NiJ9.VGhpcyBpcyB0aGUgY29udGVudCB0byBzaWduLg.<signature>"
success = jws.LoadJws(jwsCompact)
If success = False Then
    Log(jws.LastErrorText)
    Return
End If


'  Copy the optional unprotected header of signature 0 into a JsonObject.  This applies to JWS in a
'  JSON serialization form that carries an unprotected header.
Dim json As ChilkatJsonObject
json.Initialize
success = jws.GetUnprotectedH(0, json)
If success = False Then
    Log(jws.LastErrorText)
    Return
End If


json.EmitCompact = False
Log(json.Emit)