Generación de token web y token de acceso de JSON

Este artículo explica el código necesario para generar el JWT y el token de acceso necesarios para realizar llamadas REST a Adobe Campaign Standard

Generar token web JSON

El primer paso para utilizar la API de Adobe Campaign es generar JWT. Existen numerosos ejemplos de código sobre cómo generar JWT para ACS. Puede seguir esta muestra de código java para generar JWT.

Para utilizar la API ACS con AEM Forms, necesitamos crear JWT dentro de un paquete OSGi. Se ha utilizado el siguiente fragmento de código para generar JWT en este paquete OSGI de muestra. Los detalles sobre la instancia ACS se recuperan de las propiedades de configuración OSGI que se establecen como se muestra arriba.

configuración

A. Los valores que se muestran aquí son valores ficticios

El siguiente código obtiene los detalles sobre Adobe Campaign Server desde la configuración OSGI. Creamos una clave privada de las líneas 80 a 104.

Una vez que tengamos la clave privada crearemos el 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;
    }

 }

Generar token de acceso

A continuación, intercambiamos el JWT generado por un token de acceso realizando una llamada del POST. Este token de acceso se enviará como clave de autorización en el encabezado HTTP para las llamadas REST posteriores

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