Génération du jeton Web JSON et du jeton d’accès

Cet article explique le code nécessaire à la génération de JWT et de jeton d’accès nécessaires pour effectuer des appels REST vers Adobe Campaign Standard.

Générer un jeton Web JSON

La première étape de l’utilisation de l’API Adobe Campaign consiste à générer JWT. Il existe de nombreux exemples de code sur la manière de générer JWT pour ACS. Vous pouvez suivre cet exemple de code java pour générer JWT.

Pour utiliser l’API ACS avec AEM Forms, nous devons créer JWT dans un lot OSGi. Le fragment de code suivant a été utilisé pour générer JWT dans cet exemple de lot OSGI. Les détails de l’instance ACS sont récupérés à partir des propriétés de configuration OSGI définies comme illustré ci-dessus.

configuration

A. Les valeurs affichées ici sont des valeurs factices.

Le code suivant récupère les détails sur le serveur Adobe Campaign à partir de la configuration OSGI. Nous créons une clé privée des lignes 80 à 104.

Une fois que nous avons la clé privée, nous créons le jeton 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;
    }

 }

Générer un jeton d’accès

Nous échangeons ensuite le jeton JWT généré pour un jeton d’accès en effectuant un appel de POST. Ce jeton d’accès sera alors envoyé en tant que clé d’autorisation dans l’en-tête HTTP pour les appels REST suivants

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