Classic ASP

Load and Validate a JWS from a String

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.LoadJws, which loads a JWS from its compact serialization string. The example then supplies the MAC key and validates the signature.

Background. Validate returns 1 when the signature or MAC is cryptographically valid, 0 when it is not, or a negative value on error. The key for the signer index must be provided before validating.

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Classic ASP

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
success = 0

set jws = Server.CreateObject("Chilkat.Jws")

'  Load the JWS compact serialization.
jwsCompact = "eyJhbGciOiJIUzI1NiJ9.VGhpcyBpcyB0aGUgY29udGVudCB0byBzaWduLg.<signature>"
success = jws.LoadJws(jwsCompact)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( jws.LastErrorText) & "</pre>"
    Response.End
End If

'  Provide the HMAC key for signer 0, then validate the signature.  Validate returns 1 when the
'  signature is cryptographically valid, 0 when it is not, or a negative value on error.
base64Key = "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU="
success = jws.SetMacKey(0,base64Key,"base64")
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( jws.LastErrorText) & "</pre>"
    Response.End
End If

v = jws.Validate(0)
If (v < 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( jws.LastErrorText) & "</pre>"
    Response.End
End If

If (v <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( "The signature is not valid.") & "</pre>"
    Response.End
End If

Response.Write "<pre>" & Server.HTMLEncode( "The signature is valid.") & "</pre>"

%>
</body>
</html>