1 /*
2 * Copyright 2014-2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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 * A copy of the License is located at
7 *
8 * http://aws.amazon.com/apache2.0
9 *
10 * or in the "license" file accompanying this file. This file is distributed
11 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
12 * express or implied. See the License for the specific language governing
13 * permissions and limitations under the License.
14 */
15 package com.amazonaws.auth.internal;
16
17 import com.amazonaws.annotation.Immutable;
18
19 /**
20 * Holds the signing key and the number of days since epoch for the date for
21 * which the signing key was generated.
22 */
23 @Immutable
24 public final class SignerKey {
25
26 private final long numberOfDaysSinceEpoch;
27
28 private final byte[] signingKey;
29
30 public SignerKey(long numberOfDaysSinceEpoch, byte[] signingKey) {
31 if (numberOfDaysSinceEpoch <= 0L) {
32 throw new IllegalArgumentException(
33 "Not able to cache signing key. Signing date to be cached is invalid");
34 }
35 if (signingKey == null) {
36 throw new IllegalArgumentException(
37 "Not able to cache signing key. Signing Key to be cached are null");
38 }
39 this.numberOfDaysSinceEpoch = numberOfDaysSinceEpoch;
40 this.signingKey = signingKey.clone();
41 }
42
43 /**
44 * Returns the number of days since epoch for the date used for generating
45 * signing key.
46 */
47 public long getNumberOfDaysSinceEpoch() {
48 return numberOfDaysSinceEpoch;
49 }
50
51 /**
52 * Returns a copy of the signing key.
53 */
54 public byte[] getSigningKey() {
55 return signingKey.clone();
56 }
57 }
58