resolved Issue #7

src/main/java/io/jsonwebtoken/PrematureJwtException.java

@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2014 jsonwebtoken.io
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.jsonwebtoken;
+
+/**
+ * Exception indicating that a JWT was accepted before it is allowed to be accessed and must be rejected.
+ *
+ * @since 0.3
+ */
+public class PrematureJwtException extends JwtException {
+
+    public PrematureJwtException(String message) {
+        super(message);
+    }
+
+    @SuppressWarnings("UnusedDeclaration")
+    public PrematureJwtException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}

src/main/java/io/jsonwebtoken/impl/DefaultJwtParser.java

@@ -26,6 +26,7 @@
 import io.jsonwebtoken.JwtHandlerAdapter;
 import io.jsonwebtoken.JwtParser;
 import io.jsonwebtoken.MalformedJwtException;
+import io.jsonwebtoken.PrematureJwtException;
 import io.jsonwebtoken.SignatureAlgorithm;
 import io.jsonwebtoken.SignatureException;
 import io.jsonwebtoken.UnsupportedJwtException;
@@ -190,7 +191,6 @@ public Jwt parse(String jwt) throws ExpiredJwtException, MalformedJwtException,
                 }
             }
 
-            /*
             //https://tools.ietf.org/html/draft-ietf-oauth-json-web-token-30#section-4.1.5
             //token MUST NOT be accepted before any specified nbf time:
             Date nbf = claims.getNotBefore();
@@ -209,7 +209,6 @@ public Jwt parse(String jwt) throws ExpiredJwtException, MalformedJwtException,
                     throw new PrematureJwtException(msg);
                 }
             }
-            */
         }
 
         // =============== Signature =================

src/test/groovy/io/jsonwebtoken/JwtParserTest.groovy

@@ -174,7 +174,6 @@ class JwtParserTest {
         }
     }
 
-    /*
     @Test
     void testParseWithPrematureJwt() {
 
@@ -188,7 +187,6 @@ class JwtParserTest {
             assertTrue e.getMessage().startsWith('JWT must not be accepted before ')
         }
     }
-    */
 
     // ========================================================================
     // parsePlaintextJwt tests
@@ -322,6 +320,20 @@ class JwtParserTest {
         }
     }
 
+    @Test
+    void testParseClaimsJwtWithPrematureJwt() {
+
+        Date nbf = new Date(System.currentTimeMillis() + 100000);
+
+        String compact = Jwts.builder().setSubject('Joe').setNotBefore(nbf).compact();
+
+        try {
+            Jwts.parser().parseClaimsJwt(compact);
+        } catch (PrematureJwtException e) {
+            assertTrue e.getMessage().startsWith('JWT must not be accepted before ')
+        }
+    }
+
     // ========================================================================
     // parsePlaintextJws tests
     // ========================================================================
@@ -425,6 +437,22 @@ class JwtParserTest {
         }
     }
 
+    @Test
+    void testParseClaimsJwsWithPrematureJws() {
+
+        byte[] key = randomKey()
+
+        Date nbf = new Date(System.currentTimeMillis() + 100000);
+
+        String compact = Jwts.builder().setSubject('Joe').setNotBefore(nbf).signWith(SignatureAlgorithm.HS256, key).compact();
+
+        try {
+            Jwts.parser().parseClaimsJws(compact);
+        } catch (PrematureJwtException e) {
+            assertTrue e.getMessage().startsWith('JWT must not be accepted before ')
+        }
+    }
+
     @Test
     void testParseClaimsJwsWithPlaintextJwt() {