VY6MPaWR

1package DataClasses.JWToken;
2
3import io.jsonwebtoken.*;
4
5import javax.crypto.spec.SecretKeySpec;
6import javax.xml.bind.DatatypeConverter;
7import java.io.IOException;
8import java.security.Key;
9import java.util.Date;
10import java.util.Map;
11
12public class JsonWebToken {
13    private String key = "secret_key";
14    private String jwt;
15
16    public JsonWebToken(){
17    this.jwt = null;
18    }
19
20    public String CreateJsonWebToken(String id, String isuser, String subject, long ttlMillis){
21//The JWT signature algorithm we will be using to sign the token
22        SignatureAlgorithm signatureAlgorithm = SignatureAlgorithm.HS256;
23
24        long nowMillis = System.currentTimeMillis();
25        Date now = new Date(nowMillis);
26
27//We will sign our JWT with our ApiKey secret
28        byte[] apiKeySecretBytes = DatatypeConverter.parseBase64Binary(key);
29        Key signingKey = new SecretKeySpec(apiKeySecretBytes, signatureAlgorithm.getJcaName());
30
31        Header header = Jwts.header();
32        header.setType("JWT");
33
34        JwtBuilder builder = Jwts.builder().setHeader((Map<String, Object>)
35                header).setId(id)
36                .setIssuedAt(now)
37                .setSubject(subject)
38                .setIssuer(isuser)
39                .signWith(signatureAlgorithm, signingKey);
40
41//if it has been specified, let's add the expiration
42        if (ttlMillis >= 0) {
43            long expMillis = nowMillis + ttlMillis;
44            Date exp = new Date(expMillis);
45            builder.setExpiration(exp);
46        }
47
48//Builds the JWT and serializes it to a compact, URL-safe string
49        return builder.compact();
50    }
51
52    public String ParseJsonWebToken(String jwt) {
53        try {
54            //This line will throw an exception if it is not a signed JWS (as expected)
55            Claims claims = Jwts.parser()
56                    .setSigningKey(DatatypeConverter.parseBase64Binary(key))
57                    .parseClaimsJws(jwt).getBody();
58
59            System.out.println("ID: " + claims.getId());
60            System.out.println("Subject: " + claims.getSubject());
61            System.out.println("Issuer: " + claims.getIssuer());
62            System.out.println("Expiration: " + claims.getExpiration());
63
64            String r = "ID: " + claims.getId() + " Subject: " + claims.getSubject() + " Issuer: " + claims.getIssuer() + " Expiration: " + claims.getExpiration();
65            return r;
66        }
67            catch (ExpiredJwtException eje){
68            return "not signed token";
69        }
70    }
71
72    public String JWT_get_ID(String jwt)throws IOException {
73        try {
74            //This line will throw an exception if it is not a signed JWS (as expected)
75            Claims claims = Jwts.parser()
76                    .setSigningKey(DatatypeConverter.parseBase64Binary(key))
77                    .parseClaimsJws(jwt).getBody();
78
79            return claims.getId();
80        }
81        catch (ExpiredJwtException eje){
82            return "not signed token";
83        }
84    }
85}