B4X

Set the JWS Payload from BinData

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetPayloadBd, which sets the payload to be signed from the binary bytes in a BinData.

Background. JWS (JSON Web Signature) integrity-protects a payload with a signature or MAC. The header alg names the algorithm; this example uses HMAC-SHA256 (HS256) with a symmetric MAC key.

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Dim success As Boolean = False

Dim jws As ChilkatJws
jws.Initialize

'  Set the payload from the binary bytes in a BinData.
Dim bdPayload As ChilkatBinData
bdPayload.Initialize
bdPayload.AppendString("Binary content to sign.", "utf-8")

success = jws.SetPayloadBd(bdPayload)
If success = False Then
    Log(jws.LastErrorText)
    Return
End If

Log("Payload set.")