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.

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

success = 0

set jws = CreateObject("Chilkat.Jws")

'  Protected header specifying RSASSA-PKCS1-v1_5 with SHA-256 (RS256).
set header = CreateObject("Chilkat.JsonObject")
success = header.UpdateString("alg","RS256")
success = jws.SetProtectedHeader(0,header)
If (success = 0) Then
    outFile.WriteLine(jws.LastErrorText)
    WScript.Quit
End If

bIncludeBom = 0
success = jws.SetPayload("This is the content to sign.","utf-8",bIncludeBom)
If (success = 0) Then
    outFile.WriteLine(jws.LastErrorText)
    WScript.Quit
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 = CreateObject("Chilkat.Cert")
success = cert.LoadPfxFile("qa_data/signer.pfx",pfxPassword)
If (success = 0) Then
    outFile.WriteLine(cert.LastErrorText)
    WScript.Quit
End If

success = jws.SetSigningCert(0,cert)
If (success = 0) Then
    outFile.WriteLine(jws.LastErrorText)
    WScript.Quit
End If

jwsCompact = jws.CreateJws()
If (jws.LastMethodSuccess = 0) Then
    outFile.WriteLine(jws.LastErrorText)
    WScript.Quit
End If

outFile.WriteLine(jwsCompact)

outFile.Close