add oauth token endpoint

Author: lbalmaceda

auth0/src/main/java/com/auth0/authentication/AuthenticationAPIClient.java

@@ -29,17 +29,18 @@
 import com.auth0.authentication.result.DatabaseUser;
 import com.auth0.authentication.result.Delegation;
 import com.auth0.authentication.result.UserProfile;
-import com.auth0.request.internal.RequestFactory;
 import com.auth0.request.AuthenticationRequest;
 import com.auth0.request.ParameterizableRequest;
 import com.auth0.request.Request;
+import com.auth0.request.internal.RequestFactory;
 import com.auth0.util.Telemetry;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.squareup.okhttp.HttpUrl;
 import com.squareup.okhttp.OkHttpClient;
 
 import java.util.Map;
 
+import static com.auth0.authentication.ParameterBuilder.GRANT_TYPE_AUTHORIZATION_CODE;
 import static com.auth0.authentication.ParameterBuilder.GRANT_TYPE_PASSWORD;
 
 /**
@@ -67,8 +68,12 @@ public class AuthenticationAPIClient {
     private static final String PASSWORDLESS_PATH = "passwordless";
     private static final String START_PATH = "start";
     private static final String OAUTH_PATH = "oauth";
+    private static final String TOKEN_PATH = "token";
     private static final String RESOURCE_OWNER_PATH = "ro";
     private static final String TOKEN_INFO_PATH = "tokeninfo";
+    private static final String OAUTH_CODE_KEY = "code";
+    private static final String OAUTH_CODE_VERIFIER_KEY = "code_verifier";
+    private static final String REDIRECT_URI_KEY = "redirect_uri";
 
     private final Auth0 auth0;
     private final OkHttpClient client;
@@ -160,7 +165,7 @@ public AuthenticationRequest login(String usernameOrEmail, String password) {
      *      .start(new BaseCallback<Credentials>() {
      *          {@literal}Override
      *          public void onSuccess(Credentials payload) { }
-
+     *
      *          {@literal}Override
      *          public void onFailure(Auth0Exception error) { }
      *      });
@@ -194,7 +199,7 @@ public AuthenticationRequest loginWithOAuthAccessToken(String token, String conn
      *      .start(new BaseCallback<Credentials>() {
      *          {@literal}Override
      *          public void onSuccess(Credentials payload) { }
-
+     *
      *          {@literal}@Override
      *          public void onFailure(Auth0Exception error) { }
      *      });
@@ -223,7 +228,7 @@ public AuthenticationRequest loginWithPhoneNumber(String phoneNumber, String ver
      *      .start(new BaseCallback<Credentials>() {
      *          {@literal}Override
      *          public void onSuccess(Credentials payload) { }
-
+     *
      *          {@literal}@Override
      *          public void onFailure(Auth0Exception error) { }
      *      });
@@ -252,7 +257,7 @@ public AuthenticationRequest loginWithEmail(String email, String verificationCod
      *      .start(new BaseCallback<UserProfile>() {
      *          {@literal}Override
      *          public void onSuccess(UserProfile payload) { }
-
+     *
      *          {@literal}@Override
      *          public void onFailure(Auth0Exception error) { }
      *      });
@@ -677,4 +682,30 @@ private ParameterizableRequest<UserProfile> profileRequest() {
 
         return factory.POST(url, client, mapper, UserProfile.class);
     }
+
+    /**
+     * Fetch the token information from Auth0, using the authorization_code grant type
+     *
+     * @param authorizationCode the authorization code received from the /authorize call.
+     * @param codeVerifier      the code verifier used when requesting a code to /authorize.
+     * @param redirectUri       the uri to redirect after a successful request.
+     * @return a request to configure and start
+     */
+    public AuthenticationRequest token(String authorizationCode, String codeVerifier, String redirectUri) {
+        Map<String, Object> parameters = ParameterBuilder.newBuilder()
+                .setClientId(getClientId())
+                .setGrantType(GRANT_TYPE_AUTHORIZATION_CODE)
+                .set(OAUTH_CODE_KEY, authorizationCode)
+                .set(OAUTH_CODE_VERIFIER_KEY, codeVerifier)
+                .set(REDIRECT_URI_KEY, redirectUri)
+                .asDictionary();
+
+        HttpUrl url = HttpUrl.parse(auth0.getDomainUrl()).newBuilder()
+                .addPathSegment(OAUTH_PATH)
+                .addPathSegment(TOKEN_PATH)
+                .build();
+
+        return factory.authenticationPOST(url, client, mapper)
+                .addAuthenticationParameters(parameters);
+    }
 }

auth0/src/main/java/com/auth0/authentication/ParameterBuilder.java

@@ -32,7 +32,7 @@
 
 /**
  * Builder for Auth0 Authentication API parameters
- *
+ * <p/>
  * You can build your parameters like this
  * <pre><code>
  *     Map<String, Object> parameters = ParameterBuilder.newBuilder()
@@ -49,6 +49,7 @@ public class ParameterBuilder {
 
     public static final String GRANT_TYPE_PASSWORD = "password";
     public static final String GRANT_TYPE_JWT = "urn:ietf:params:oauth:grant-type:jwt-bearer";
+    public static final String GRANT_TYPE_AUTHORIZATION_CODE = "authorization_code";
 
     public static final String SCOPE_OPENID = "openid";
     public static final String SCOPE_OFFLINE_ACCESS = "openid offline_access";