new default jwt validator method

Author: BastiaanJansen

src/main/java/com/bastiaanjansen/jwt/ClaimValidator.java

@@ -1,5 +1,6 @@
 package com.bastiaanjansen.jwt;
 
+@FunctionalInterface
 public interface ClaimValidator {
     boolean validate(Object value);
 }

src/main/java/com/bastiaanjansen/jwt/DefaultJWTValidator.java

@@ -125,6 +125,16 @@ public Builder withOneOfAudience(String... audience) {
                 }
                 return false;
             });
+
+            return this;
+        }
+
+        public Builder withAllOfAudience(String... audience) {
+            withClaim(Payload.Registered.AUDIENCE, value -> {
+                String[] values = (String[]) value;
+                return Arrays.asList(values).containsAll(Arrays.asList(audience));
+            });
+
             return this;
         }
 
@@ -195,10 +205,10 @@ public DefaultJWTValidator build() {
     }
 
     public Map<String, ClaimValidator> getHeaderValidators() {
-        return headerValidators;
+        return new HashMap<>(headerValidators);
     }
 
     public Map<String, ClaimValidator> getPayloadValidators() {
-        return payloadValidators;
+        return new HashMap<>(payloadValidators);
     }
 }

src/test/java/com/bastiaanjansen/jwt/DefaultJWTValidatorTest.java

@@ -159,6 +159,22 @@ void validateWithValidAudience_doesNotThrow() throws JWTCreationException {
         assertDoesNotThrow(() -> validator.validate(jwt));
     }
 
+    @Test
+    void validateWithValidAllAudience_doesNotThrow() throws JWTCreationException {
+        JWT jwt = new JWT.Builder(algorithm).withAudience("aud1", "aud2", "aud3").build();
+        JWTValidator validator = new DefaultJWTValidator.Builder().withAllOfAudience("aud1", "aud2").build();
+
+        assertDoesNotThrow(() -> validator.validate(jwt));
+    }
+
+    @Test
+    void validateWithValidAllAudience_throwsJWTValidationException() throws JWTCreationException {
+        JWT jwt = new JWT.Builder(algorithm).withAudience("aud1", "aud3").build();
+        JWTValidator validator = new DefaultJWTValidator.Builder().withAllOfAudience("aud1", "aud2").build();
+
+        assertThrows(JWTValidationException.class, () -> validator.validate(jwt));
+    }
+
     @Test
     void validateWithInvalidExpirationDate_throwsJWTValidationException() throws JWTCreationException {
         JWT jwt = new JWT.Builder(algorithm).withExpirationTime(100).build();