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/*
* Copyright 2022 Anton Tananaev (anton@traccar.org)
*
* 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 org.traccar.api.signature;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.commons.codec.binary.Base64;
import org.traccar.storage.StorageException;
import javax.inject.Inject;
import java.io.IOException;
import java.security.GeneralSecurityException;
import java.util.Date;
import java.util.concurrent.TimeUnit;
public class TokenManager {
private static final int DEFAULT_EXPIRATION_DAYS = 7;
private final ObjectMapper objectMapper;
private final CryptoManager cryptoManager;
public static class Data {
@JsonProperty("u")
private long userId;
@JsonProperty("e")
private Date expiration;
}
@Inject
public TokenManager(ObjectMapper objectMapper, CryptoManager cryptoManager) {
this.objectMapper = objectMapper;
this.cryptoManager = cryptoManager;
}
public String generateToken(
long userId, Date expiration) throws IOException, GeneralSecurityException, StorageException {
Data data = new Data();
data.userId = userId;
if (expiration != null) {
data.expiration = expiration;
} else {
data.expiration = new Date(System.currentTimeMillis() + TimeUnit.DAYS.toMillis(DEFAULT_EXPIRATION_DAYS));
}
byte[] encoded = objectMapper.writeValueAsBytes(data);
return Base64.encodeBase64URLSafeString(cryptoManager.sign(encoded));
}
public long verifyToken(String token) throws IOException, GeneralSecurityException, StorageException {
byte[] encoded = cryptoManager.verify(Base64.decodeBase64(token));
Data data = objectMapper.readValue(encoded, Data.class);
if (data.expiration.before(new Date())) {
throw new SecurityException("Token has expired");
}
return data.userId;
}
}
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