Add ability to parse body without verification (#95)

Author: segabriel

tokens/src/main/java/io/scalecube/security/tokens/jwt/JwtTokenResolver.java

@@ -3,9 +3,16 @@
 import java.util.Map;
 import reactor.core.publisher.Mono;
 
-@FunctionalInterface
 public interface JwtTokenResolver {
 
+  /**
+   * Parses and returns token claims without verification.
+   *
+   * @param token jwt token
+   * @return parsed claims
+   */
+  Map<String, Object> parseBody(String token);
+
   /**
    * Verifies and returns token claims if everything went ok.
    *

tokens/src/main/java/io/scalecube/security/tokens/jwt/JwtTokenResolverImpl.java

@@ -82,6 +82,13 @@ public JwtTokenResolverImpl cleanupInterval(Duration cleanupInterval) {
     return c;
   }
 
+  @Override
+  public Map<String, Object> parseBody(String token) {
+    JwtTokenParser tokenParser = tokenParserFactory.newParser(token);
+    JwtToken jwtToken = tokenParser.parseToken();
+    return jwtToken.body();
+  }
+
   @Override
   public Mono<Map<String, Object>> resolve(String token) {
     return Mono.defer(