Okta Client Credentails - API access

Question

I created Oka application (API Services) for machine to machine Auth. I set client authentication as "Public key / Private key".

Can someone help with Spring boot application that connects to this API via public/private key method and gets access token.

I implemented Client Secret authentication by passing credentials in header.

I am new to public/private key method. Appreciate the help.

I am trying to implement public/private key auth method to get access token from OKTA.

Answer 1

For client credentials, basic auth, I am using this code: HttpHeaders httpHeaders = new HttpHeaders();

    httpHeaders.setContentType(MediaType.APPLICATION_JSON);
    String auth = "user name"+":"+"password";
    byte[] encodedAuth = java.util.Base64.getEncoder().encode(auth.getBytes());
    httpHeaders.set("Authorization", "Basic " + new String(encodedAuth));
    httpHeaders.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
    httpHeaders.setAccept(List.of(MediaType.APPLICATION_JSON));
    MultiValueMap<String, String> reqBodyData = new LinkedMultiValueMap<>();
    reqBodyData.add("grant_type","client_credentials");
    HttpEntity<MultiValueMap<String, String>> requestEntity = new HttpEntity<>(reqBodyData, httpHeaders);
    LinkedHashMap<String, String> result = (LinkedHashMap<String, String>) restTemplate.postForEntity("<<auth token end point>>",
            requestEntity, Object.class).getBody();
    String accessToken = result.get("access_token");

Will need to find a way for pub-private key insteasd of basic auth.