PowerBuilder

Export a Public Key as a JWK

Demonstrates the Chilkat PublicKey.GetJwk method, which returns the public key as a compact JWK (JSON Web Key). It takes no arguments; binary values use Base64url without padding and the member order is stable across calls.

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 a public key to JWK is exactly what you do to publish it in a JWK Set (a jwks_uri endpoint) so others can verify your signatures. The stable member order matters because it makes the output reproducible, which is important when the JWK feeds into a thumbprint.

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PowerBuilder

integer li_rc
integer li_Success
oleobject loo_PubKey
string ls_Jwk

li_Success = 0

//  Load a public key to export.  LoadFromFile inspects the content, so it accepts DER, PEM, XML,
//  JWK, and other supported representations.
loo_PubKey = create oleobject
li_rc = loo_PubKey.ConnectToNewObject("Chilkat.PublicKey")
if li_rc < 0 then
    destroy loo_PubKey
    MessageBox("Error","Connecting to COM object failed")
    return
end if
li_Success = loo_PubKey.LoadFromFile("qa_data/public.pem")
if li_Success = 0 then
    Write-Debug loo_PubKey.LastErrorText
    destroy loo_PubKey
    return
end if

//  Export the public key as a compact JWK (JSON Web Key).  Binary values use Base64url without
//  padding, and the member order is stable across calls.
ls_Jwk = loo_PubKey.GetJwk()
if loo_PubKey.LastMethodSuccess = 0 then
    Write-Debug loo_PubKey.LastErrorText
    destroy loo_PubKey
    return
end if

Write-Debug ls_Jwk


destroy loo_PubKey