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 import io.jsonwebtoken.lang.Assert;
20
21 import java.security.Key;
22
23 public class DefaultSignerFactory implements SignerFactory {
24
25 public static final SignerFactory INSTANCE = new DefaultSignerFactory();
26
27 @Override
28 public Signer createSigner(SignatureAlgorithm alg, Key key) {
29 Assert.notNull(alg, "SignatureAlgorithm cannot be null.");
30 Assert.notNull(key, "Signing Key cannot be null.");
31
32 switch (alg) {
33 case HS256:
34 case HS384:
35 case HS512:
36 return new MacSigner(alg, key);
37 case RS256:
38 case RS384:
39 case RS512:
40 case PS256:
41 case PS384:
42 case PS512:
43 return new RsaSigner(alg, key);
44 case ES256:
45 case ES384:
46 case ES512:
47 return new EllipticCurveSigner(alg, key);
48 default:
49 throw new IllegalArgumentException("The '" + alg.name() + "' algorithm cannot be used for signing.");
50 }
51 }
52 }
53