PowerBuilder

Load a Private Key from a JWK

Demonstrates the Chilkat PrivateKey.LoadJwk method, which loads a private key from JWK (JSON Web Key) JSON. The only argument is the JWK JSON string. Supported key types are RSA, EC, and Ed25519 (kty=OKP).

Background: JWK is the JSON key format used throughout modern web security — JWT signing, OAuth, OpenID Connect — so this loader is what you use to consume a key from a JWK Set or an identity provider. A private JWK includes the private parameters (d and, for RSA, the CRT values); a public-only JWK omits them. As JSON in the clear, a private JWK must be handled as sensitive material.

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integer li_rc
integer li_Success
oleobject loo_PrivKey
string ls_Jwk

li_Success = 0

//  Demonstrates the PrivateKey.LoadJwk method, which loads a private key from JWK (JSON Web Key)
//  JSON.  The only argument is the JWK JSON string.  Supported key types are RSA, EC, and
//  Ed25519 (kty=OKP).

loo_PrivKey = create oleobject
li_rc = loo_PrivKey.ConnectToNewObject("Chilkat.PrivateKey")
if li_rc < 0 then
    destroy loo_PrivKey
    MessageBox("Error","Connecting to COM object failed")
    return
end if

//  A private JWK.  For a real key, "d" (and the other private parameters) would be present.
ls_Jwk = "{~"kty~":~"EC~",~"crv~":~"P-256~",~"x~":~"...~",~"y~":~"...~",~"d~":~"...~"}"

li_Success = loo_PrivKey.LoadJwk(ls_Jwk)
if li_Success = 0 then
    Write-Debug loo_PrivKey.LastErrorText
    destroy loo_PrivKey
    return
end if

Write-Debug "Loaded a " + loo_PrivKey.KeyType + " private key."


destroy loo_PrivKey