Fixed issues in JWT Authenticator

components/webapp-authenticator-framework/org.wso2.carbon.webapp.authenticator.framework/src/main/java/org/wso2/carbon/webapp/authenticator/framework/authenticator/JWTAuthenticator.java

@@ -48,7 +48,7 @@ import java.util.StringTokenizer;
 public class JWTAuthenticator implements WebappAuthenticator {
 
     private static final Log log = LogFactory.getLog(JWTAuthenticator.class);
-	public static final String SIGNED_JWT_AUTH_USERNAME = "Username";
+    public static final String SIGNED_JWT_AUTH_USERNAME = "http://wso2.org/claims/enduser";
     private static final String JWT_AUTHENTICATOR = "JWT";
     private static final String JWT_ASSERTION_HEADER = "X-JWT-Assertion";
 
@@ -83,11 +83,10 @@ public class JWTAuthenticator implements WebappAuthenticator {
         KeyStoreManager keyStoreManager = KeyStoreManager.getInstance(MultitenantConstants.SUPER_TENANT_ID);
         try {
             keyStoreManager.getDefaultPrimaryCertificate();
-			String authorizationHeader = request.getHeader(HTTPConstants.HEADER_AUTHORIZATION);
+            String authorizationHeader = request.getHeader(JWT_ASSERTION_HEADER);
-			String headerData = decodeAuthorizationHeader(authorizationHeader);
             JWSVerifier verifier =
                     new RSASSAVerifier((RSAPublicKey) keyStoreManager.getDefaultPublicKey());
-			SignedJWT jwsObject = SignedJWT.parse(headerData);
+            SignedJWT jwsObject = SignedJWT.parse(authorizationHeader);
             if (jwsObject.verify(verifier)) {
                 String username = jwsObject.getJWTClaimsSet().getStringClaim(SIGNED_JWT_AUTH_USERNAME);
                 String tenantDomain = MultitenantUtils.getTenantDomain(username);
@@ -108,6 +107,8 @@ public class JWTAuthenticator implements WebappAuthenticator {
                         authenticationInfo.setStatus(Status.CONTINUE);
                     }
                 }
+            } else {
+                authenticationInfo.setStatus(Status.FAILURE);
             }
         } catch (UserStoreException e) {
             log.error("Error occurred while obtaining the user.", e);