Classic ASP

Sign a JWS with a Certificate

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetSigningCert, which sets the certificate whose associated private key is used to create a signature.

The file path is relative to the application's current working directory. An absolute path may also be used. Supply the path appropriate to your own environment.

Background. The certificate must have an accessible private key. This is convenient when the signing identity is held as a certificate (for example loaded from a PFX).

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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")

'  Protected header specifying RSASSA-PKCS1-v1_5 with SHA-256 (RS256).
set header = Server.CreateObject("Chilkat.JsonObject")
success = header.UpdateString("alg","RS256")
success = jws.SetProtectedHeader(0,header)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( jws.LastErrorText) & "</pre>"
    Response.End
End If

bIncludeBom = 0
success = jws.SetPayload("This is the content to sign.","utf-8",bIncludeBom)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( jws.LastErrorText) & "</pre>"
    Response.End
End If

'  The file path is relative to the application's current working directory.  An absolute path
'  may also be used.  Supply the path appropriate to your own environment.
'  The PFX password should come from a secure source rather than being hard-coded.
pfxPassword = "myPfxPassword"

'  Load a certificate that has an associated private key, then set it as the signing certificate for
'  signature 0.  The certificate's private key is used to create the signature.
set cert = Server.CreateObject("Chilkat.Cert")
success = cert.LoadPfxFile("qa_data/signer.pfx",pfxPassword)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( cert.LastErrorText) & "</pre>"
    Response.End
End If

success = jws.SetSigningCert(0,cert)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( jws.LastErrorText) & "</pre>"
    Response.End
End If

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

Response.Write "<pre>" & Server.HTMLEncode( jwsCompact) & "</pre>"

%>
</body>
</html>