Generazione del token web JSON e del token di accesso

Questo articolo spiega il codice necessario per generare JWT e Access Token necessari per effettuare chiamate REST ad Adobe Campaign Standard

Genera token web JSON

Il primo passaggio nell’utilizzo dell’API di Adobe Campaign consiste nella generazione di JWT. Ci sono numerosi esempi di codice su come generare JWT per ACS. Puoi seguire questo esempio di codice java per generare JWT.

Per utilizzare l’API ACS con AEM Forms, dobbiamo creare JWT all’interno di un bundle OSGi. Il seguente frammento di codice è stato utilizzato per generare JWT in questo bundle OSGI di esempio. I dettagli sull’istanza ACS vengono recuperati dalle proprietà di configurazione OSGI impostate come mostrato sopra.

configurazione

A. I valori mostrati sono valori fittizi

Il codice seguente recupera i dettagli sul server Adobe Campaign dalla configurazione OSGI. Creiamo una chiave privata dalle linee 80-104.

Una volta che abbiamo la chiave privata, creiamo il Token Web JSON.

package aemformwithcampaign.core.services.impl;
import static io.jsonwebtoken.SignatureAlgorithm.RS256;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.security.KeyFactory;
import java.security.NoSuchAlgorithmException;
import java.security.interfaces.RSAPrivateKey;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.KeySpec;
import java.security.spec.PKCS8EncodedKeySpec;
import java.util.ArrayList;

import java.util.HashMap;
import java.util.List;

import javax.jcr.Node;

import org.apache.commons.compress.utils.IOUtils;
import org.apache.http.Consts;
import org.apache.http.HttpEntity;
import org.apache.http.HttpHost;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.apache.sling.api.resource.Resource;
import org.apache.sling.api.resource.ResourceResolver;
import org.json.JSONObject;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Reference;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.mergeandfuse.getserviceuserresolver.GetResolver;

import aemforms.campaign.core.CampaignService;
import aemformwithcampaign.core.*;
import formsandcampaign.demo.CampaignConfigurationService;
import io.jsonwebtoken.Jwts;
@Component(service=CampaignService.class, immediate = true)
public class CampaignServiceImpl implements CampaignService {
 private final Logger log = LoggerFactory.getLogger(getClass());

    @Reference
    CampaignConfigurationService config;
    @Reference
    GetResolver getResolver;
    private static final String SERVER_FQDN = "mc.adobe.io";
    private static final String AUTH_SERVER_FQDN = "ims-na1.adobelogin.com";
    private static final String AUTH_ENDPOINT = "/ims/exchange/jwt/";
    private static final String CREATE_PROFILE_ENDPOINT = "/campaign/profileAndServicesExt/profile/";
 @SuppressWarnings("unused")
 @Override
 public String getAccessToken() throws IOException, NoSuchAlgorithmException, InvalidKeySpecException {
  // TODO Auto-generated method stub
  log.info("JWT: Generating Token");

        String apikey = config.getApiKey();
        log.debug("The API Key i got was "+apikey);
        String techact = config.getTechAcct();
        String orgid = config.getOrgId();
        String clientsecret = config.getClientSecret();
        String realm = config.getDomainRealm();
        
        HttpClient httpClient = HttpClientBuilder.create().build();
        Long expirationTime = System.currentTimeMillis() / 1000 + 86400L;
        try {
         ResourceResolver rr = getResolver.getServiceResolver();
            Resource privateKeyRes = rr.getResource("/etc/key/campaign/private.key");
         InputStream is = privateKeyRes.adaptTo(InputStream.class);
            BufferedInputStream bis = new BufferedInputStream(is);
            ByteArrayOutputStream buf = new ByteArrayOutputStream();
            int result = bis.read();
            while (result != -1) {
                byte b = (byte) result;
                buf.write(b);
                result = bis.read();
            }

            String privatekeyString = buf.toString();
            privatekeyString  = privatekeyString.replaceAll("\\n", "").replace("-----BEGIN PRIVATE KEY-----", "").replace("-----END PRIVATE KEY-----", "");
            log.debug("The sanitized private key string is "+privatekeyString);
            // Create the private key
            KeyFactory keyFactory = KeyFactory.getInstance("RSA");
            log.debug("The key factory algorithm is "+keyFactory.getAlgorithm());
            byte []byteArray = privatekeyString.getBytes();
            log.debug("The array length is "+byteArray.length);
            //KeySpec ks = new PKCS8EncodedKeySpec(Base64.getDecoder().decode(keyString));
            byte[] encodedBytes = javax.xml.bind.DatatypeConverter.parseBase64Binary(privatekeyString);
            //KeySpec ks = new PKCS8EncodedKeySpec(byteArray);
            KeySpec ks = new PKCS8EncodedKeySpec(encodedBytes);
            String metascopes[] = new String[]{"ent_campaign_sdk"};
            RSAPrivateKey privateKey = (RSAPrivateKey) keyFactory.generatePrivate(ks);
            HashMap<String, Object> jwtClaims = new HashMap<>();
            jwtClaims.put("iss", orgid);
            jwtClaims.put("sub", techact);
            jwtClaims.put("exp", expirationTime);
            jwtClaims.put("aud", "https://" + AUTH_SERVER_FQDN + "/c/" + apikey);
            //jwtClaims.put("https://" + AUTH_SERVER_FQDN + "/s/" + realm, true);
            for (String metascope : metascopes) {
                jwtClaims.put("https://" + AUTH_SERVER_FQDN + "/s/" + metascope,java.lang.Boolean.TRUE);
            }
            
            // Create the final JWT token
            String jwtToken = Jwts.builder().setClaims(jwtClaims).signWith(RS256, privateKey).compact();
            log.debug("#####The jwtToken is  ####"+jwtToken+"#######");
            HttpHost authServer = new HttpHost(AUTH_SERVER_FQDN, 443, "https");
            HttpPost authPostRequest = new HttpPost(AUTH_ENDPOINT);
            authPostRequest.addHeader("Cache-Control", "no-cache");
            List<NameValuePair> params = new ArrayList<NameValuePair>();
            params.add(new BasicNameValuePair("client_id", apikey));
            params.add(new BasicNameValuePair("client_secret", clientsecret));
            params.add(new BasicNameValuePair("jwt_token", jwtToken));
            authPostRequest.setEntity(new UrlEncodedFormEntity(params, Consts.UTF_8));
            HttpResponse response = httpClient.execute(authServer, authPostRequest);
            if (200 != response.getStatusLine().getStatusCode()) {
                HttpEntity ent = response.getEntity();
                String content = EntityUtils.toString(ent);
                log.error("JWT: Server Returned Error\n", response.getStatusLine().getReasonPhrase());
                log.error("ERROR DETAILS: \n", content);
                throw new IOException("Server returned error: " + response.getStatusLine().getReasonPhrase());
            }
            HttpEntity entity = response.getEntity();
            JsonObject jo = new JsonParser().parse(EntityUtils.toString(entity)).getAsJsonObject();
            log.debug("Returning access_token " + jo.get("access_token").getAsString());
            return jo.get("access_token").getAsString();


        }
        catch (Exception e)
        {
         e.printStackTrace();
        }
  return null;
 }
 @Override
 public String createProfile(JsonObject profile) {
  // TODO Auto-generated method stub
  String jwtToken = null;
  try {
   jwtToken = getAccessToken();
  } catch (NoSuchAlgorithmException e2) {
   // TODO Auto-generated catch block
   e2.printStackTrace();
  } catch (InvalidKeySpecException e2) {
   // TODO Auto-generated catch block
   e2.printStackTrace();
  } catch (IOException e2) {
   // TODO Auto-generated catch block
   e2.printStackTrace();
  }
        String tenant = config.getTenant();
        String apikey = config.getApiKey();
        String path = "/" + tenant + CREATE_PROFILE_ENDPOINT;
        log.debug("The API Key is "+apikey);
        log.debug("###The Path is "+path);
        HttpHost server = new HttpHost(SERVER_FQDN, 443, "https");
        HttpPost postReq = new HttpPost(path);
        postReq.addHeader("Cache-Control", "no-cache");
        postReq.addHeader("Content-Type", "application/json");
        postReq.addHeader("X-Api-Key", apikey);
        postReq.addHeader("Authorization", "Bearer " + jwtToken);
        StringEntity se = null;
        log.debug("Creating profile for"+profile.toString());
  try {
   se = new StringEntity(profile.toString());

  } catch (UnsupportedEncodingException e1) {
   // TODO Auto-generated catch block
   e1.printStackTrace();
  }
  postReq.setEntity(se);
  HttpClient httpClient = HttpClientBuilder.create().build();
  HttpResponse result;
   try {
    result = httpClient.execute(server, postReq);
    JsonObject responseJson = new JsonParser().parse(EntityUtils.toString(result.getEntity()))
    .getAsJsonObject();
    log.debug("The response on creating profile is " + responseJson.toString());
    return responseJson.get("PKey").getAsString();

   } catch (ClientProtocolException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }

  return null;
    }

 }

Genera token di accesso

Quindi scambiamo il JWT generato per un token di accesso effettuando una chiamata POST. Questo token di accesso verrà quindi inviato come chiave di autorizzazione nell’intestazione HTTP per le successive chiamate REST

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