1 /*
2 * Copyright (C) 2014 jsonwebtoken.io
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package io.jsonwebtoken.impl.crypto;
17
18 import io.jsonwebtoken.SignatureAlgorithm;
19
20 import java.security.Key;
21 import java.security.MessageDigest;
22 import java.util.Arrays;
23
24 public class MacValidator implements SignatureValidator {
25
26 private final MacSigner signer;
27
28 public MacValidator(SignatureAlgorithm alg, Key key) {
29 this.signer = new MacSigner(alg, key);
30 }
31
32 @Override
33 public boolean isValid(byte[] data, byte[] signature) {
34 byte[] computed = this.signer.sign(data);
35 return MessageDigest.isEqual(computed, signature);
36 }
37 }
38