VBScript

Export a Private Key as a JWK

Demonstrates the Chilkat PrivateKey.GetJwk method, which exports the key as a compact JWK (JSON Web Key). It takes no arguments; binary values use Base64url without padding.

Note: The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: JWK is the JSON key format used across modern web security — JWT, OAuth, OpenID Connect. Exporting to it lets you publish a key into a JWK Set or hand it to a web framework that speaks JWK. Note this is the private JWK: it includes the private parameters (d and, for RSA, the CRT values), so it is highly sensitive — publish only the public JWK derived from ToPublicKey when sharing.

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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

'  Load a private key to export.
set privKey = CreateObject("Chilkat.PrivateKey")
success = privKey.LoadPemFile("qa_data/private.pem")
If (success = 0) Then
    outFile.WriteLine(privKey.LastErrorText)
    WScript.Quit
End If

'  Export as a compact JWK (JSON Web Key).  Binary values use Base64url without padding.
jwk = privKey.GetJwk()
If (privKey.LastMethodSuccess = 0) Then
    outFile.WriteLine(privKey.LastErrorText)
    WScript.Quit
End If

outFile.WriteLine(jwk)

outFile.Close