VBScript

Create a JWS

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.CreateJws, which creates and returns a JWS from the current payload, headers, and signing key.

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.

Chilkat VBScript Downloads

Download Chilkat for VBScript

VBScript

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")

'  Set the protected header for signer 0, specifying the signature algorithm (alg).
set header = CreateObject("Chilkat.JsonObject")
success = header.UpdateString("alg","HS256")
success = jws.SetProtectedHeader(0,header)
If (success = 0) Then
    outFile.WriteLine(jws.LastErrorText)
    WScript.Quit
End If

'  Set the payload to be signed.
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

'  Provide the HMAC key (base64) for signer 0.  In production, obtain the key from a secure source
'  rather than hard-coding it.
base64Key = "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU="
success = jws.SetMacKey(0,base64Key,"base64")
If (success = 0) Then
    outFile.WriteLine(jws.LastErrorText)
    WScript.Quit
End If

'  Create the JWS from the current payload, headers, and signing key.  The returned string is the
'  JWS (compact serialization by default).
jwsCompact = jws.CreateJws()
If (jws.LastMethodSuccess = 0) Then
    outFile.WriteLine(jws.LastErrorText)
    WScript.Quit
End If

outFile.WriteLine(jwsCompact)

outFile.Close