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/*
* ============LICENSE_START=======================================================
* ONAP : ccsdk features
* ================================================================================
* Copyright (C) 2021 highstreet technologies GmbH Intellectual Property.
* All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*
*/
package org.onap.ccsdk.features.sdnr.wt.oauthprovider.providers;
import com.auth0.jwt.JWT;
import com.auth0.jwt.algorithms.Algorithm;
import com.auth0.jwt.exceptions.JWTDecodeException;
import com.auth0.jwt.exceptions.JWTVerificationException;
import com.auth0.jwt.interfaces.DecodedJWT;
import com.auth0.jwt.interfaces.JWTVerifier;
import java.io.IOException;
import java.security.Security;
import java.util.Arrays;
import java.util.Date;
import java.util.Optional;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.onap.ccsdk.features.sdnr.wt.oauthprovider.data.Config;
import org.onap.ccsdk.features.sdnr.wt.oauthprovider.data.UserTokenPayload;
import org.onap.ccsdk.features.sdnr.wt.oauthprovider.http.AuthHttpServlet;
import org.apache.shiro.authc.BearerToken;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class TokenCreator {
private static final Logger LOG = LoggerFactory.getLogger(AuthHttpServlet.class.getName());
private final String issuer;
private static TokenCreator _instance;
private final long tokenLifetimeSeconds;
private final Algorithm algorithm;
private static final String ROLES_CLAIM = "roles";
private static final String FAMILYNAME_CLAIM = "family_name";
private static final String NAME_CLAIM = "name";
private static final String PROVIDERID_CLAIM = "provider_id";
private static final String COOKIE_NAME_AUTH = "token";
static {
Security.addProvider(
new BouncyCastleProvider()
);
}
public static TokenCreator getInstance(Config config) throws IllegalArgumentException, IOException {
if (_instance == null) {
_instance = new TokenCreator(config);
}
return _instance;
}
public static TokenCreator getInstance(String alg, String secret, String issuer, long tokenLifetime)
throws IllegalArgumentException, IOException {
return getInstance(alg, secret, null, issuer, tokenLifetime);
}
public static TokenCreator getInstance(String alg, String secret, String pubkey, String issuer, long tokenLifetime)
throws IllegalArgumentException, IOException {
if (_instance == null) {
_instance = new TokenCreator(alg, secret, pubkey, issuer, tokenLifetime);
}
return _instance;
}
private TokenCreator(Config config) throws IllegalArgumentException, IOException {
this(config.getAlgorithm(), config.getTokenSecret(), config.getPublicKey(), config.getTokenIssuer(),
config.getTokenLifetime());
}
private TokenCreator(String alg, String secret, String pubkey, String issuer, long tokenLifetime)
throws IllegalArgumentException, IOException {
this.issuer = issuer;
this.tokenLifetimeSeconds = tokenLifetime;
this.algorithm = this.createAlgorithm(alg, secret, pubkey);
}
private Algorithm createAlgorithm(String alg, String secret, String pubkey)
throws IllegalArgumentException, IOException {
if (alg == null) {
alg = Config.TOKENALG_HS256;
}
switch (alg) {
case Config.TOKENALG_HS256:
return Algorithm.HMAC256(secret);
case Config.TOKENALG_RS256:
return Algorithm.RSA256(RSAKeyReader.getPublicKey(pubkey), RSAKeyReader.getPrivateKey(secret));
case Config.TOKENALG_RS512:
return Algorithm.RSA512(RSAKeyReader.getPublicKey(pubkey), RSAKeyReader.getPrivateKey(secret));
case Config.TOKENALG_CLIENT_RS256:
return Algorithm.RSA256(RSAKeyReader.getPublicKey(pubkey), null);
case Config.TOKENALG_CLIENT_RS512:
return Algorithm.RSA512(RSAKeyReader.getPublicKey(pubkey), null);
}
throw new IllegalArgumentException(String.format("unable to find algorithm for %s", alg));
}
public BearerToken createNewJWT(UserTokenPayload data) {
final String token = JWT.create().withIssuer(issuer).withExpiresAt(new Date(data.getExp()))
.withIssuedAt(new Date(data.getIat())).withSubject(data.getPreferredUsername())
.withClaim(NAME_CLAIM, data.getGivenName()).withClaim(FAMILYNAME_CLAIM, data.getFamilyName())
.withClaim(PROVIDERID_CLAIM, data.getProviderId())
.withArrayClaim(ROLES_CLAIM, data.getRoles().toArray(new String[data.getRoles().size()]))
.sign(this.algorithm);
LOG.trace("token created: {}", token);
return new BearerToken(token);
}
public DecodedJWT verify(String token) {
DecodedJWT jwt = null;
LOG.debug("try to verify token {}", token);
try {
JWTVerifier verifier = JWT.require(this.algorithm).withIssuer(issuer).build();
jwt = verifier.verify(token);
} catch (JWTVerificationException e) {
LOG.warn("unable to verify token {}:", token, e);
}
return jwt;
}
public long getDefaultExp() {
return new Date().getTime() + (this.tokenLifetimeSeconds * 1000);
}
public long getDefaultExp(long expIn) {
return new Date().getTime() + expIn;
}
public long getDefaultIat() {
return new Date().getTime();
}
public String getBearerToken(HttpServletRequest req) {
return this.getBearerToken(req, false);
}
public String getBearerToken(HttpServletRequest req, boolean checkCookie) {
final String authHeader = req.getHeader("Authorization");
if ((authHeader == null || !authHeader.startsWith("Bearer")) && checkCookie) {
Cookie[] cookies = req.getCookies();
Optional<Cookie> ocookie = Optional.empty();
if (cookies != null) {
ocookie = Arrays.stream(cookies).filter(c -> c != null && COOKIE_NAME_AUTH.equals(c.getName()))
.findFirst();
}
if (ocookie.isEmpty()) {
return null;
}
return ocookie.get().getValue();
}
return authHeader.substring(7);
}
public UserTokenPayload decode(HttpServletRequest req) throws JWTDecodeException {
final String token = this.getBearerToken(req);
return token != null ? this.decode(token) : null;
}
public UserTokenPayload decode(String token) {
if (token == null) {
return null;
}
DecodedJWT jwt = JWT.decode(token);
UserTokenPayload data = new UserTokenPayload();
data.setRoles(Arrays.asList(jwt.getClaim(ROLES_CLAIM).asArray(String.class)));
data.setExp(jwt.getExpiresAt().getTime());
data.setFamilyName(jwt.getClaim(FAMILYNAME_CLAIM).asString());
data.setGivenName(jwt.getClaim(NAME_CLAIM).asString());
data.setPreferredUsername(jwt.getClaim(NAME_CLAIM).asString());
data.setProviderId(jwt.getClaim(PROVIDERID_CLAIM).asString());
return data;
}
public Cookie createAuthCookie(BearerToken data) {
Cookie cookie = new Cookie(COOKIE_NAME_AUTH, data.getToken());
cookie.setMaxAge((int) this.tokenLifetimeSeconds);
cookie.setPath("/");
cookie.setHttpOnly(true);
cookie.setSecure(true);
return cookie;
}
}
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